From 6798243ceb7b97c515000ea64e6335da223b042e Mon Sep 17 00:00:00 2001 From: "DESKTOP-4RNDQIC\\29019" <290198252@qq.com> Date: Mon, 4 Oct 2021 22:45:36 +0800 Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=B1=8F=E5=B9=95=E6=8D=95?= =?UTF-8?q?=E8=8E=B7=E5=8A=9F=E8=83=BD?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .gitignore | 4 + client/qt_gl_/yuvgl/conanfile.txt | 4 + client/qt_gl_/yuvgl/inc/qedit.h | 66 + client/qt_gl_/yuvgl/inc/zlib.h | 1916 +++++++++++++++++ client/qt_gl_/yuvgl/librtmp/hashswf.c | 1 + client/qt_gl_/yuvgl/librtmp/parseurl.c | 1 + client/qt_gl_/yuvgl/librtmp/rtmp.c | 15 +- client/qt_gl_/yuvgl/librtmp/strncasecmp.h | 17 + client/qt_gl_/yuvgl/librtmp/zlib.h | 1916 +++++++++++++++++ client/qt_gl_/yuvgl/main.cpp | 8 +- client/qt_gl_/yuvgl/mainwindow.ui | 8 +- client/qt_gl_/yuvgl/media/AACAudioCoder.cpp | 2 +- client/qt_gl_/yuvgl/media/DXGICapture.cpp | 683 ++++++ client/qt_gl_/yuvgl/media/DXGICapture.h | 92 + client/qt_gl_/yuvgl/media/DXGICaptureHelper.h | 960 +++++++++ client/qt_gl_/yuvgl/media/DXGICaptureTypes.h | 150 ++ client/qt_gl_/yuvgl/media/VideoCoder.h | 1 - client/qt_gl_/yuvgl/media/audiocaptureff.cpp | 21 +- client/qt_gl_/yuvgl/media/screen_capture.cpp | 31 + client/qt_gl_/yuvgl/media/screen_capture.h | 14 + client/qt_gl_/yuvgl/qedit.h | 66 + client/qt_gl_/yuvgl/ui_mainwindow.h | 161 ++ client/qt_gl_/yuvgl/ui_process.h | 63 + client/qt_gl_/yuvgl/ui_qsstoast.h | 55 + client/qt_gl_/yuvgl/ui_toast.h | 52 + client/qt_gl_/yuvgl/yuvgl.pro | 65 +- client/qt_gl_/yuvgl/yuvgl.pro.user | 6 +- client/qt_gl_/yuvgl/zlib.h | 1916 +++++++++++++++++ 28 files changed, 8250 insertions(+), 44 deletions(-) create mode 100644 client/qt_gl_/yuvgl/conanfile.txt create mode 100644 client/qt_gl_/yuvgl/inc/qedit.h create mode 100644 client/qt_gl_/yuvgl/inc/zlib.h create mode 100644 client/qt_gl_/yuvgl/librtmp/strncasecmp.h create mode 100644 client/qt_gl_/yuvgl/librtmp/zlib.h create mode 100644 client/qt_gl_/yuvgl/media/DXGICapture.cpp create mode 100644 client/qt_gl_/yuvgl/media/DXGICapture.h create mode 100644 client/qt_gl_/yuvgl/media/DXGICaptureHelper.h create mode 100644 client/qt_gl_/yuvgl/media/DXGICaptureTypes.h create mode 100644 client/qt_gl_/yuvgl/media/screen_capture.cpp create mode 100644 client/qt_gl_/yuvgl/media/screen_capture.h create mode 100644 client/qt_gl_/yuvgl/qedit.h create mode 100644 client/qt_gl_/yuvgl/ui_mainwindow.h create mode 100644 client/qt_gl_/yuvgl/ui_process.h create mode 100644 client/qt_gl_/yuvgl/ui_qsstoast.h create mode 100644 client/qt_gl_/yuvgl/ui_toast.h create mode 100644 client/qt_gl_/yuvgl/zlib.h diff --git a/.gitignore b/.gitignore index 59f4bba..7a8312d 100644 --- a/.gitignore +++ b/.gitignore @@ -31,3 +31,7 @@ client/qt_gl_/yuvgl/yuvgl.pro.user.3ffb486 client/qt_gl_/yuvgl/yuvgl.pro.user.4.10-pre1 client/qt_gl_/yuvgl/yuvgl.pro.user.bccf4b5 client/qt_gl_/yuvgl/yuvgl.pro.user.ed68183.4.8-pre1 +client/qt_gl_/yuvgl/debug/ +client/qt_gl_/build-yuvgl-Desktop_Qt_5_14_0_MSVC2017_64bit-Debug/ +client/qt_gl_/build-yuvgl-Desktop_Qt_5_14_0_MSVC2017_32bit-Debug/ +client/qt_gl_/build-yuvgl-Desktop_Qt_5_14_0_MinGW_64_bit-Debug/ diff --git a/client/qt_gl_/yuvgl/conanfile.txt b/client/qt_gl_/yuvgl/conanfile.txt new file mode 100644 index 0000000..3134468 --- /dev/null +++ b/client/qt_gl_/yuvgl/conanfile.txt @@ -0,0 +1,4 @@ +[requires] +ffmpeg/4.2.1 +[imports] +.,* -> ./third/msvc32 @ folder=True, ignore_case=True, excludes=*.html *.jpeg \ No newline at end of file diff --git a/client/qt_gl_/yuvgl/inc/qedit.h b/client/qt_gl_/yuvgl/inc/qedit.h new file mode 100644 index 0000000..a520288 --- /dev/null +++ b/client/qt_gl_/yuvgl/inc/qedit.h @@ -0,0 +1,66 @@ + +#include +#include + +#pragma comment(lib, "strmiids.lib") + +#ifndef __qedit_h__ +#define __qedit_h__ + +/////////////////////////////////////////////////////////////////////////////////// + +#pragma once + +/////////////////////////////////////////////////////////////////////////////////// + +struct __declspec(uuid("0579154a-2b53-4994-b0d0-e773148eff85")) + ISampleGrabberCB : IUnknown +{ + // + // Raw methods provided by interface + // + + virtual HRESULT __stdcall SampleCB( + double SampleTime, + struct IMediaSample * pSample) = 0; + virtual HRESULT __stdcall BufferCB( + double SampleTime, + unsigned char * pBuffer, + long BufferLen) = 0; +}; + + + + +struct __declspec(uuid("6b652fff-11fe-4fce-92ad-0266b5d7c78f")) + ISampleGrabber : IUnknown +{ + // + // Raw methods provided by interface + // + + virtual HRESULT __stdcall SetOneShot( + long OneShot) = 0; + virtual HRESULT __stdcall SetMediaType( + struct _AMMediaType * pType) = 0; + virtual HRESULT __stdcall GetConnectedMediaType( + struct _AMMediaType * pType) = 0; + virtual HRESULT __stdcall SetBufferSamples( + long BufferThem) = 0; + virtual HRESULT __stdcall GetCurrentBuffer( + /*[in,out]*/ long * pBufferSize, + /*[out]*/ long * pBuffer) = 0; + virtual HRESULT __stdcall GetCurrentSample( + /*[out,retval]*/ struct IMediaSample * * ppSample) = 0; + virtual HRESULT __stdcall SetCallback( + struct ISampleGrabberCB * pCallback, + long WhichMethodToCallback) = 0; +}; + + +static const IID IID_ISampleGrabber = { 0x6B652FFF, 0x11FE, 0x4fce,{ 0x92, 0xAD, 0x02, 0x66, 0xB5, 0xD7, 0xC7, 0x8F } }; +static const IID IID_ISampleGrabberCB = { 0x0579154A, 0x2B53, 0x4994,{ 0xB0, 0xD0, 0xE7, 0x73, 0x14, 0x8E, 0xFF, 0x85 } }; +static const CLSID CLSID_SampleGrabber = { 0xC1F400A0, 0x3F08, 0x11d3,{ 0x9F, 0x0B, 0x00, 0x60, 0x08, 0x03, 0x9E, 0x37 } }; +static const CLSID CLSID_NullRenderer = { 0xC1F400A4, 0x3F08, 0x11d3,{ 0x9F, 0x0B, 0x00, 0x60, 0x08, 0x03, 0x9E, 0x37 } }; + +#endif \ No newline at end of file diff --git a/client/qt_gl_/yuvgl/inc/zlib.h b/client/qt_gl_/yuvgl/inc/zlib.h new file mode 100644 index 0000000..32c2ce0 --- /dev/null +++ b/client/qt_gl_/yuvgl/inc/zlib.h @@ -0,0 +1,1916 @@ +/* zlib.h -- interface of the 'zlib' general purpose compression library + version 1.2.11, January 15th, 2017 + + Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + + Jean-loup Gailly Mark Adler + jloup@gzip.org madler@alumni.caltech.edu + + + The data format used by the zlib library is described by RFCs (Request for + Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950 + (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format). +*/ + +#ifndef ZLIB_H +#define ZLIB_H + +#include "zconf.h" + +#include +#undef ZEXTERN +#define ZEXTERN Q_CORE_EXPORT + +#ifdef __cplusplus +extern "C" { +#endif + +#define ZLIB_VERSION "1.2.11 (Qt)" +#define ZLIB_VERNUM 0x12b0f +#define ZLIB_VER_MAJOR 1 +#define ZLIB_VER_MINOR 2 +#define ZLIB_VER_REVISION 11 +#define ZLIB_VER_SUBREVISION 0 + +/* + The 'zlib' compression library provides in-memory compression and + decompression functions, including integrity checks of the uncompressed data. + This version of the library supports only one compression method (deflation) + but other algorithms will be added later and will have the same stream + interface. + + Compression can be done in a single step if the buffers are large enough, + or can be done by repeated calls of the compression function. In the latter + case, the application must provide more input and/or consume the output + (providing more output space) before each call. + + The compressed data format used by default by the in-memory functions is + the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped + around a deflate stream, which is itself documented in RFC 1951. + + The library also supports reading and writing files in gzip (.gz) format + with an interface similar to that of stdio using the functions that start + with "gz". The gzip format is different from the zlib format. gzip is a + gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. + + This library can optionally read and write gzip and raw deflate streams in + memory as well. + + The zlib format was designed to be compact and fast for use in memory + and on communications channels. The gzip format was designed for single- + file compression on file systems, has a larger header than zlib to maintain + directory information, and uses a different, slower check method than zlib. + + The library does not install any signal handler. The decoder checks + the consistency of the compressed data, so the library should never crash + even in the case of corrupted input. +*/ + +typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); +typedef void (*free_func) OF((voidpf opaque, voidpf address)); + +struct internal_state; + +typedef struct z_stream_s { + z_const Bytef *next_in; /* next input byte */ + uInt avail_in; /* number of bytes available at next_in */ + uLong total_in; /* total number of input bytes read so far */ + + Bytef *next_out; /* next output byte will go here */ + uInt avail_out; /* remaining free space at next_out */ + uLong total_out; /* total number of bytes output so far */ + + z_const char *msg; /* last error message, NULL if no error */ + struct internal_state FAR *state; /* not visible by applications */ + + alloc_func zalloc; /* used to allocate the internal state */ + free_func zfree; /* used to free the internal state */ + voidpf opaque; /* private data object passed to zalloc and zfree */ + + int data_type; /* best guess about the data type: binary or text + for deflate, or the decoding state for inflate */ + uLong adler; /* Adler-32 or CRC-32 value of the uncompressed data */ + uLong reserved; /* reserved for future use */ +} z_stream; + +typedef z_stream FAR *z_streamp; + +/* + gzip header information passed to and from zlib routines. See RFC 1952 + for more details on the meanings of these fields. +*/ +typedef struct gz_header_s { + int text; /* true if compressed data believed to be text */ + uLong time; /* modification time */ + int xflags; /* extra flags (not used when writing a gzip file) */ + int os; /* operating system */ + Bytef *extra; /* pointer to extra field or Z_NULL if none */ + uInt extra_len; /* extra field length (valid if extra != Z_NULL) */ + uInt extra_max; /* space at extra (only when reading header) */ + Bytef *name; /* pointer to zero-terminated file name or Z_NULL */ + uInt name_max; /* space at name (only when reading header) */ + Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */ + uInt comm_max; /* space at comment (only when reading header) */ + int hcrc; /* true if there was or will be a header crc */ + int done; /* true when done reading gzip header (not used + when writing a gzip file) */ +} gz_header; + +typedef gz_header FAR *gz_headerp; + +/* + The application must update next_in and avail_in when avail_in has dropped + to zero. It must update next_out and avail_out when avail_out has dropped + to zero. The application must initialize zalloc, zfree and opaque before + calling the init function. All other fields are set by the compression + library and must not be updated by the application. + + The opaque value provided by the application will be passed as the first + parameter for calls of zalloc and zfree. This can be useful for custom + memory management. The compression library attaches no meaning to the + opaque value. + + zalloc must return Z_NULL if there is not enough memory for the object. + If zlib is used in a multi-threaded application, zalloc and zfree must be + thread safe. In that case, zlib is thread-safe. When zalloc and zfree are + Z_NULL on entry to the initialization function, they are set to internal + routines that use the standard library functions malloc() and free(). + + On 16-bit systems, the functions zalloc and zfree must be able to allocate + exactly 65536 bytes, but will not be required to allocate more than this if + the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers + returned by zalloc for objects of exactly 65536 bytes *must* have their + offset normalized to zero. The default allocation function provided by this + library ensures this (see zutil.c). To reduce memory requirements and avoid + any allocation of 64K objects, at the expense of compression ratio, compile + the library with -DMAX_WBITS=14 (see zconf.h). + + The fields total_in and total_out can be used for statistics or progress + reports. After compression, total_in holds the total size of the + uncompressed data and may be saved for use by the decompressor (particularly + if the decompressor wants to decompress everything in a single step). +*/ + + /* constants */ + +#define Z_NO_FLUSH 0 +#define Z_PARTIAL_FLUSH 1 +#define Z_SYNC_FLUSH 2 +#define Z_FULL_FLUSH 3 +#define Z_FINISH 4 +#define Z_BLOCK 5 +#define Z_TREES 6 +/* Allowed flush values; see deflate() and inflate() below for details */ + +#define Z_OK 0 +#define Z_STREAM_END 1 +#define Z_NEED_DICT 2 +#define Z_ERRNO (-1) +#define Z_STREAM_ERROR (-2) +#define Z_DATA_ERROR (-3) +#define Z_MEM_ERROR (-4) +#define Z_BUF_ERROR (-5) +#define Z_VERSION_ERROR (-6) +/* Return codes for the compression/decompression functions. Negative values + * are errors, positive values are used for special but normal events. + */ + +#define Z_NO_COMPRESSION 0 +#define Z_BEST_SPEED 1 +#define Z_BEST_COMPRESSION 9 +#define Z_DEFAULT_COMPRESSION (-1) +/* compression levels */ + +#define Z_FILTERED 1 +#define Z_HUFFMAN_ONLY 2 +#define Z_RLE 3 +#define Z_FIXED 4 +#define Z_DEFAULT_STRATEGY 0 +/* compression strategy; see deflateInit2() below for details */ + +#define Z_BINARY 0 +#define Z_TEXT 1 +#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */ +#define Z_UNKNOWN 2 +/* Possible values of the data_type field for deflate() */ + +#define Z_DEFLATED 8 +/* The deflate compression method (the only one supported in this version) */ + +#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */ + +#define zlib_version zlibVersion() +/* for compatibility with versions < 1.0.2 */ + + + /* basic functions */ + +ZEXTERN const char * ZEXPORT zlibVersion OF((void)); +/* The application can compare zlibVersion and ZLIB_VERSION for consistency. + If the first character differs, the library code actually used is not + compatible with the zlib.h header file used by the application. This check + is automatically made by deflateInit and inflateInit. + */ + +/* +ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level)); + + Initializes the internal stream state for compression. The fields + zalloc, zfree and opaque must be initialized before by the caller. If + zalloc and zfree are set to Z_NULL, deflateInit updates them to use default + allocation functions. + + The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: + 1 gives best speed, 9 gives best compression, 0 gives no compression at all + (the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION + requests a default compromise between speed and compression (currently + equivalent to level 6). + + deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if level is not a valid compression level, or + Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible + with the version assumed by the caller (ZLIB_VERSION). msg is set to null + if there is no error message. deflateInit does not perform any compression: + this will be done by deflate(). +*/ + + +ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); +/* + deflate compresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. deflate performs one or both of the + following actions: + + - Compress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), next_in and avail_in are updated and + processing will resume at this point for the next call of deflate(). + + - Generate more output starting at next_out and update next_out and avail_out + accordingly. This action is forced if the parameter flush is non zero. + Forcing flush frequently degrades the compression ratio, so this parameter + should be set only when necessary. Some output may be provided even if + flush is zero. + + Before the call of deflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating avail_in or avail_out accordingly; avail_out should + never be zero before the call. The application can consume the compressed + output when it wants, for example when the output buffer is full (avail_out + == 0), or after each call of deflate(). If deflate returns Z_OK and with + zero avail_out, it must be called again after making room in the output + buffer because there might be more output pending. See deflatePending(), + which can be used if desired to determine whether or not there is more ouput + in that case. + + Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to + decide how much data to accumulate before producing output, in order to + maximize compression. + + If the parameter flush is set to Z_SYNC_FLUSH, all pending output is + flushed to the output buffer and the output is aligned on a byte boundary, so + that the decompressor can get all input data available so far. (In + particular avail_in is zero after the call if enough output space has been + provided before the call.) Flushing may degrade compression for some + compression algorithms and so it should be used only when necessary. This + completes the current deflate block and follows it with an empty stored block + that is three bits plus filler bits to the next byte, followed by four bytes + (00 00 ff ff). + + If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the + output buffer, but the output is not aligned to a byte boundary. All of the + input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. + This completes the current deflate block and follows it with an empty fixed + codes block that is 10 bits long. This assures that enough bytes are output + in order for the decompressor to finish the block before the empty fixed + codes block. + + If flush is set to Z_BLOCK, a deflate block is completed and emitted, as + for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to + seven bits of the current block are held to be written as the next byte after + the next deflate block is completed. In this case, the decompressor may not + be provided enough bits at this point in order to complete decompression of + the data provided so far to the compressor. It may need to wait for the next + block to be emitted. This is for advanced applications that need to control + the emission of deflate blocks. + + If flush is set to Z_FULL_FLUSH, all output is flushed as with + Z_SYNC_FLUSH, and the compression state is reset so that decompression can + restart from this point if previous compressed data has been damaged or if + random access is desired. Using Z_FULL_FLUSH too often can seriously degrade + compression. + + If deflate returns with avail_out == 0, this function must be called again + with the same value of the flush parameter and more output space (updated + avail_out), until the flush is complete (deflate returns with non-zero + avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that + avail_out is greater than six to avoid repeated flush markers due to + avail_out == 0 on return. + + If the parameter flush is set to Z_FINISH, pending input is processed, + pending output is flushed and deflate returns with Z_STREAM_END if there was + enough output space. If deflate returns with Z_OK or Z_BUF_ERROR, this + function must be called again with Z_FINISH and more output space (updated + avail_out) but no more input data, until it returns with Z_STREAM_END or an + error. After deflate has returned Z_STREAM_END, the only possible operations + on the stream are deflateReset or deflateEnd. + + Z_FINISH can be used in the first deflate call after deflateInit if all the + compression is to be done in a single step. In order to complete in one + call, avail_out must be at least the value returned by deflateBound (see + below). Then deflate is guaranteed to return Z_STREAM_END. If not enough + output space is provided, deflate will not return Z_STREAM_END, and it must + be called again as described above. + + deflate() sets strm->adler to the Adler-32 checksum of all input read + so far (that is, total_in bytes). If a gzip stream is being generated, then + strm->adler will be the CRC-32 checksum of the input read so far. (See + deflateInit2 below.) + + deflate() may update strm->data_type if it can make a good guess about + the input data type (Z_BINARY or Z_TEXT). If in doubt, the data is + considered binary. This field is only for information purposes and does not + affect the compression algorithm in any manner. + + deflate() returns Z_OK if some progress has been made (more input + processed or more output produced), Z_STREAM_END if all input has been + consumed and all output has been produced (only when flush is set to + Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example + if next_in or next_out was Z_NULL or the state was inadvertently written over + by the application), or Z_BUF_ERROR if no progress is possible (for example + avail_in or avail_out was zero). Note that Z_BUF_ERROR is not fatal, and + deflate() can be called again with more input and more output space to + continue compressing. +*/ + + +ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the + stream state was inconsistent, Z_DATA_ERROR if the stream was freed + prematurely (some input or output was discarded). In the error case, msg + may be set but then points to a static string (which must not be + deallocated). +*/ + + +/* +ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); + + Initializes the internal stream state for decompression. The fields + next_in, avail_in, zalloc, zfree and opaque must be initialized before by + the caller. In the current version of inflate, the provided input is not + read or consumed. The allocation of a sliding window will be deferred to + the first call of inflate (if the decompression does not complete on the + first call). If zalloc and zfree are set to Z_NULL, inflateInit updates + them to use default allocation functions. + + inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit does not perform any decompression. + Actual decompression will be done by inflate(). So next_in, and avail_in, + next_out, and avail_out are unused and unchanged. The current + implementation of inflateInit() does not process any header information -- + that is deferred until inflate() is called. +*/ + + +ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); +/* + inflate decompresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. inflate performs one or both of the + following actions: + + - Decompress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), then next_in and avail_in are updated + accordingly, and processing will resume at this point for the next call of + inflate(). + + - Generate more output starting at next_out and update next_out and avail_out + accordingly. inflate() provides as much output as possible, until there is + no more input data or no more space in the output buffer (see below about + the flush parameter). + + Before the call of inflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating the next_* and avail_* values accordingly. If the + caller of inflate() does not provide both available input and available + output space, it is possible that there will be no progress made. The + application can consume the uncompressed output when it wants, for example + when the output buffer is full (avail_out == 0), or after each call of + inflate(). If inflate returns Z_OK and with zero avail_out, it must be + called again after making room in the output buffer because there might be + more output pending. + + The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH, + Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much + output as possible to the output buffer. Z_BLOCK requests that inflate() + stop if and when it gets to the next deflate block boundary. When decoding + the zlib or gzip format, this will cause inflate() to return immediately + after the header and before the first block. When doing a raw inflate, + inflate() will go ahead and process the first block, and will return when it + gets to the end of that block, or when it runs out of data. + + The Z_BLOCK option assists in appending to or combining deflate streams. + To assist in this, on return inflate() always sets strm->data_type to the + number of unused bits in the last byte taken from strm->next_in, plus 64 if + inflate() is currently decoding the last block in the deflate stream, plus + 128 if inflate() returned immediately after decoding an end-of-block code or + decoding the complete header up to just before the first byte of the deflate + stream. The end-of-block will not be indicated until all of the uncompressed + data from that block has been written to strm->next_out. The number of + unused bits may in general be greater than seven, except when bit 7 of + data_type is set, in which case the number of unused bits will be less than + eight. data_type is set as noted here every time inflate() returns for all + flush options, and so can be used to determine the amount of currently + consumed input in bits. + + The Z_TREES option behaves as Z_BLOCK does, but it also returns when the + end of each deflate block header is reached, before any actual data in that + block is decoded. This allows the caller to determine the length of the + deflate block header for later use in random access within a deflate block. + 256 is added to the value of strm->data_type when inflate() returns + immediately after reaching the end of the deflate block header. + + inflate() should normally be called until it returns Z_STREAM_END or an + error. However if all decompression is to be performed in a single step (a + single call of inflate), the parameter flush should be set to Z_FINISH. In + this case all pending input is processed and all pending output is flushed; + avail_out must be large enough to hold all of the uncompressed data for the + operation to complete. (The size of the uncompressed data may have been + saved by the compressor for this purpose.) The use of Z_FINISH is not + required to perform an inflation in one step. However it may be used to + inform inflate that a faster approach can be used for the single inflate() + call. Z_FINISH also informs inflate to not maintain a sliding window if the + stream completes, which reduces inflate's memory footprint. If the stream + does not complete, either because not all of the stream is provided or not + enough output space is provided, then a sliding window will be allocated and + inflate() can be called again to continue the operation as if Z_NO_FLUSH had + been used. + + In this implementation, inflate() always flushes as much output as + possible to the output buffer, and always uses the faster approach on the + first call. So the effects of the flush parameter in this implementation are + on the return value of inflate() as noted below, when inflate() returns early + when Z_BLOCK or Z_TREES is used, and when inflate() avoids the allocation of + memory for a sliding window when Z_FINISH is used. + + If a preset dictionary is needed after this call (see inflateSetDictionary + below), inflate sets strm->adler to the Adler-32 checksum of the dictionary + chosen by the compressor and returns Z_NEED_DICT; otherwise it sets + strm->adler to the Adler-32 checksum of all output produced so far (that is, + total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described + below. At the end of the stream, inflate() checks that its computed Adler-32 + checksum is equal to that saved by the compressor and returns Z_STREAM_END + only if the checksum is correct. + + inflate() can decompress and check either zlib-wrapped or gzip-wrapped + deflate data. The header type is detected automatically, if requested when + initializing with inflateInit2(). Any information contained in the gzip + header is not retained unless inflateGetHeader() is used. When processing + gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output + produced so far. The CRC-32 is checked against the gzip trailer, as is the + uncompressed length, modulo 2^32. + + inflate() returns Z_OK if some progress has been made (more input processed + or more output produced), Z_STREAM_END if the end of the compressed data has + been reached and all uncompressed output has been produced, Z_NEED_DICT if a + preset dictionary is needed at this point, Z_DATA_ERROR if the input data was + corrupted (input stream not conforming to the zlib format or incorrect check + value, in which case strm->msg points to a string with a more specific + error), Z_STREAM_ERROR if the stream structure was inconsistent (for example + next_in or next_out was Z_NULL, or the state was inadvertently written over + by the application), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR + if no progress was possible or if there was not enough room in the output + buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and + inflate() can be called again with more input and more output space to + continue decompressing. If Z_DATA_ERROR is returned, the application may + then call inflateSync() to look for a good compression block if a partial + recovery of the data is to be attempted. +*/ + + +ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + inflateEnd returns Z_OK if success, or Z_STREAM_ERROR if the stream state + was inconsistent. +*/ + + + /* Advanced functions */ + +/* + The following functions are needed only in some special applications. +*/ + +/* +ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, + int level, + int method, + int windowBits, + int memLevel, + int strategy)); + + This is another version of deflateInit with more compression options. The + fields next_in, zalloc, zfree and opaque must be initialized before by the + caller. + + The method parameter is the compression method. It must be Z_DEFLATED in + this version of the library. + + The windowBits parameter is the base two logarithm of the window size + (the size of the history buffer). It should be in the range 8..15 for this + version of the library. Larger values of this parameter result in better + compression at the expense of memory usage. The default value is 15 if + deflateInit is used instead. + + For the current implementation of deflate(), a windowBits value of 8 (a + window size of 256 bytes) is not supported. As a result, a request for 8 + will result in 9 (a 512-byte window). In that case, providing 8 to + inflateInit2() will result in an error when the zlib header with 9 is + checked against the initialization of inflate(). The remedy is to not use 8 + with deflateInit2() with this initialization, or at least in that case use 9 + with inflateInit2(). + + windowBits can also be -8..-15 for raw deflate. In this case, -windowBits + determines the window size. deflate() will then generate raw deflate data + with no zlib header or trailer, and will not compute a check value. + + windowBits can also be greater than 15 for optional gzip encoding. Add + 16 to windowBits to write a simple gzip header and trailer around the + compressed data instead of a zlib wrapper. The gzip header will have no + file name, no extra data, no comment, no modification time (set to zero), no + header crc, and the operating system will be set to the appropriate value, + if the operating system was determined at compile time. If a gzip stream is + being written, strm->adler is a CRC-32 instead of an Adler-32. + + For raw deflate or gzip encoding, a request for a 256-byte window is + rejected as invalid, since only the zlib header provides a means of + transmitting the window size to the decompressor. + + The memLevel parameter specifies how much memory should be allocated + for the internal compression state. memLevel=1 uses minimum memory but is + slow and reduces compression ratio; memLevel=9 uses maximum memory for + optimal speed. The default value is 8. See zconf.h for total memory usage + as a function of windowBits and memLevel. + + The strategy parameter is used to tune the compression algorithm. Use the + value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a + filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no + string match), or Z_RLE to limit match distances to one (run-length + encoding). Filtered data consists mostly of small values with a somewhat + random distribution. In this case, the compression algorithm is tuned to + compress them better. The effect of Z_FILTERED is to force more Huffman + coding and less string matching; it is somewhat intermediate between + Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as + fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The + strategy parameter only affects the compression ratio but not the + correctness of the compressed output even if it is not set appropriately. + Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler + decoder for special applications. + + deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid + method), or Z_VERSION_ERROR if the zlib library version (zlib_version) is + incompatible with the version assumed by the caller (ZLIB_VERSION). msg is + set to null if there is no error message. deflateInit2 does not perform any + compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the compression dictionary from the given byte sequence + without producing any compressed output. When using the zlib format, this + function must be called immediately after deflateInit, deflateInit2 or + deflateReset, and before any call of deflate. When doing raw deflate, this + function must be called either before any call of deflate, or immediately + after the completion of a deflate block, i.e. after all input has been + consumed and all output has been delivered when using any of the flush + options Z_BLOCK, Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, or Z_FULL_FLUSH. The + compressor and decompressor must use exactly the same dictionary (see + inflateSetDictionary). + + The dictionary should consist of strings (byte sequences) that are likely + to be encountered later in the data to be compressed, with the most commonly + used strings preferably put towards the end of the dictionary. Using a + dictionary is most useful when the data to be compressed is short and can be + predicted with good accuracy; the data can then be compressed better than + with the default empty dictionary. + + Depending on the size of the compression data structures selected by + deflateInit or deflateInit2, a part of the dictionary may in effect be + discarded, for example if the dictionary is larger than the window size + provided in deflateInit or deflateInit2. Thus the strings most likely to be + useful should be put at the end of the dictionary, not at the front. In + addition, the current implementation of deflate will use at most the window + size minus 262 bytes of the provided dictionary. + + Upon return of this function, strm->adler is set to the Adler-32 value + of the dictionary; the decompressor may later use this value to determine + which dictionary has been used by the compressor. (The Adler-32 value + applies to the whole dictionary even if only a subset of the dictionary is + actually used by the compressor.) If a raw deflate was requested, then the + Adler-32 value is not computed and strm->adler is not set. + + deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent (for example if deflate has already been called for this stream + or if not at a block boundary for raw deflate). deflateSetDictionary does + not perform any compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateGetDictionary OF((z_streamp strm, + Bytef *dictionary, + uInt *dictLength)); +/* + Returns the sliding dictionary being maintained by deflate. dictLength is + set to the number of bytes in the dictionary, and that many bytes are copied + to dictionary. dictionary must have enough space, where 32768 bytes is + always enough. If deflateGetDictionary() is called with dictionary equal to + Z_NULL, then only the dictionary length is returned, and nothing is copied. + Similary, if dictLength is Z_NULL, then it is not set. + + deflateGetDictionary() may return a length less than the window size, even + when more than the window size in input has been provided. It may return up + to 258 bytes less in that case, due to how zlib's implementation of deflate + manages the sliding window and lookahead for matches, where matches can be + up to 258 bytes long. If the application needs the last window-size bytes of + input, then that would need to be saved by the application outside of zlib. + + deflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the + stream state is inconsistent. +*/ + +ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when several compression strategies will be + tried, for example when there are several ways of pre-processing the input + data with a filter. The streams that will be discarded should then be freed + by calling deflateEnd. Note that deflateCopy duplicates the internal + compression state which can be quite large, so this strategy is slow and can + consume lots of memory. + + deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); +/* + This function is equivalent to deflateEnd followed by deflateInit, but + does not free and reallocate the internal compression state. The stream + will leave the compression level and any other attributes that may have been + set unchanged. + + deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, + int level, + int strategy)); +/* + Dynamically update the compression level and compression strategy. The + interpretation of level and strategy is as in deflateInit2(). This can be + used to switch between compression and straight copy of the input data, or + to switch to a different kind of input data requiring a different strategy. + If the compression approach (which is a function of the level) or the + strategy is changed, and if any input has been consumed in a previous + deflate() call, then the input available so far is compressed with the old + level and strategy using deflate(strm, Z_BLOCK). There are three approaches + for the compression levels 0, 1..3, and 4..9 respectively. The new level + and strategy will take effect at the next call of deflate(). + + If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does + not have enough output space to complete, then the parameter change will not + take effect. In this case, deflateParams() can be called again with the + same parameters and more output space to try again. + + In order to assure a change in the parameters on the first try, the + deflate stream should be flushed using deflate() with Z_BLOCK or other flush + request until strm.avail_out is not zero, before calling deflateParams(). + Then no more input data should be provided before the deflateParams() call. + If this is done, the old level and strategy will be applied to the data + compressed before deflateParams(), and the new level and strategy will be + applied to the the data compressed after deflateParams(). + + deflateParams returns Z_OK on success, Z_STREAM_ERROR if the source stream + state was inconsistent or if a parameter was invalid, or Z_BUF_ERROR if + there was not enough output space to complete the compression of the + available input data before a change in the strategy or approach. Note that + in the case of a Z_BUF_ERROR, the parameters are not changed. A return + value of Z_BUF_ERROR is not fatal, in which case deflateParams() can be + retried with more output space. +*/ + +ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, + int good_length, + int max_lazy, + int nice_length, + int max_chain)); +/* + Fine tune deflate's internal compression parameters. This should only be + used by someone who understands the algorithm used by zlib's deflate for + searching for the best matching string, and even then only by the most + fanatic optimizer trying to squeeze out the last compressed bit for their + specific input data. Read the deflate.c source code for the meaning of the + max_lazy, good_length, nice_length, and max_chain parameters. + + deflateTune() can be called after deflateInit() or deflateInit2(), and + returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream. + */ + +ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm, + uLong sourceLen)); +/* + deflateBound() returns an upper bound on the compressed size after + deflation of sourceLen bytes. It must be called after deflateInit() or + deflateInit2(), and after deflateSetHeader(), if used. This would be used + to allocate an output buffer for deflation in a single pass, and so would be + called before deflate(). If that first deflate() call is provided the + sourceLen input bytes, an output buffer allocated to the size returned by + deflateBound(), and the flush value Z_FINISH, then deflate() is guaranteed + to return Z_STREAM_END. Note that it is possible for the compressed size to + be larger than the value returned by deflateBound() if flush options other + than Z_FINISH or Z_NO_FLUSH are used. +*/ + +ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm, + unsigned *pending, + int *bits)); +/* + deflatePending() returns the number of bytes and bits of output that have + been generated, but not yet provided in the available output. The bytes not + provided would be due to the available output space having being consumed. + The number of bits of output not provided are between 0 and 7, where they + await more bits to join them in order to fill out a full byte. If pending + or bits are Z_NULL, then those values are not set. + + deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. + */ + +ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + deflatePrime() inserts bits in the deflate output stream. The intent + is that this function is used to start off the deflate output with the bits + leftover from a previous deflate stream when appending to it. As such, this + function can only be used for raw deflate, and must be used before the first + deflate() call after a deflateInit2() or deflateReset(). bits must be less + than or equal to 16, and that many of the least significant bits of value + will be inserted in the output. + + deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough + room in the internal buffer to insert the bits, or Z_STREAM_ERROR if the + source stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, + gz_headerp head)); +/* + deflateSetHeader() provides gzip header information for when a gzip + stream is requested by deflateInit2(). deflateSetHeader() may be called + after deflateInit2() or deflateReset() and before the first call of + deflate(). The text, time, os, extra field, name, and comment information + in the provided gz_header structure are written to the gzip header (xflag is + ignored -- the extra flags are set according to the compression level). The + caller must assure that, if not Z_NULL, name and comment are terminated with + a zero byte, and that if extra is not Z_NULL, that extra_len bytes are + available there. If hcrc is true, a gzip header crc is included. Note that + the current versions of the command-line version of gzip (up through version + 1.3.x) do not support header crc's, and will report that it is a "multi-part + gzip file" and give up. + + If deflateSetHeader is not used, the default gzip header has text false, + the time set to zero, and os set to 255, with no extra, name, or comment + fields. The gzip header is returned to the default state by deflateReset(). + + deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, + int windowBits)); + + This is another version of inflateInit with an extra parameter. The + fields next_in, avail_in, zalloc, zfree and opaque must be initialized + before by the caller. + + The windowBits parameter is the base two logarithm of the maximum window + size (the size of the history buffer). It should be in the range 8..15 for + this version of the library. The default value is 15 if inflateInit is used + instead. windowBits must be greater than or equal to the windowBits value + provided to deflateInit2() while compressing, or it must be equal to 15 if + deflateInit2() was not used. If a compressed stream with a larger window + size is given as input, inflate() will return with the error code + Z_DATA_ERROR instead of trying to allocate a larger window. + + windowBits can also be zero to request that inflate use the window size in + the zlib header of the compressed stream. + + windowBits can also be -8..-15 for raw inflate. In this case, -windowBits + determines the window size. inflate() will then process raw deflate data, + not looking for a zlib or gzip header, not generating a check value, and not + looking for any check values for comparison at the end of the stream. This + is for use with other formats that use the deflate compressed data format + such as zip. Those formats provide their own check values. If a custom + format is developed using the raw deflate format for compressed data, it is + recommended that a check value such as an Adler-32 or a CRC-32 be applied to + the uncompressed data as is done in the zlib, gzip, and zip formats. For + most applications, the zlib format should be used as is. Note that comments + above on the use in deflateInit2() applies to the magnitude of windowBits. + + windowBits can also be greater than 15 for optional gzip decoding. Add + 32 to windowBits to enable zlib and gzip decoding with automatic header + detection, or add 16 to decode only the gzip format (the zlib format will + return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a + CRC-32 instead of an Adler-32. Unlike the gunzip utility and gzread() (see + below), inflate() will not automatically decode concatenated gzip streams. + inflate() will return Z_STREAM_END at the end of the gzip stream. The state + would need to be reset to continue decoding a subsequent gzip stream. + + inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit2 does not perform any decompression + apart from possibly reading the zlib header if present: actual decompression + will be done by inflate(). (So next_in and avail_in may be modified, but + next_out and avail_out are unused and unchanged.) The current implementation + of inflateInit2() does not process any header information -- that is + deferred until inflate() is called. +*/ + +ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the decompression dictionary from the given uncompressed byte + sequence. This function must be called immediately after a call of inflate, + if that call returned Z_NEED_DICT. The dictionary chosen by the compressor + can be determined from the Adler-32 value returned by that call of inflate. + The compressor and decompressor must use exactly the same dictionary (see + deflateSetDictionary). For raw inflate, this function can be called at any + time to set the dictionary. If the provided dictionary is smaller than the + window and there is already data in the window, then the provided dictionary + will amend what's there. The application must insure that the dictionary + that was used for compression is provided. + + inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the + expected one (incorrect Adler-32 value). inflateSetDictionary does not + perform any decompression: this will be done by subsequent calls of + inflate(). +*/ + +ZEXTERN int ZEXPORT inflateGetDictionary OF((z_streamp strm, + Bytef *dictionary, + uInt *dictLength)); +/* + Returns the sliding dictionary being maintained by inflate. dictLength is + set to the number of bytes in the dictionary, and that many bytes are copied + to dictionary. dictionary must have enough space, where 32768 bytes is + always enough. If inflateGetDictionary() is called with dictionary equal to + Z_NULL, then only the dictionary length is returned, and nothing is copied. + Similary, if dictLength is Z_NULL, then it is not set. + + inflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the + stream state is inconsistent. +*/ + +ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); +/* + Skips invalid compressed data until a possible full flush point (see above + for the description of deflate with Z_FULL_FLUSH) can be found, or until all + available input is skipped. No output is provided. + + inflateSync searches for a 00 00 FF FF pattern in the compressed data. + All full flush points have this pattern, but not all occurrences of this + pattern are full flush points. + + inflateSync returns Z_OK if a possible full flush point has been found, + Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point + has been found, or Z_STREAM_ERROR if the stream structure was inconsistent. + In the success case, the application may save the current current value of + total_in which indicates where valid compressed data was found. In the + error case, the application may repeatedly call inflateSync, providing more + input each time, until success or end of the input data. +*/ + +ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when randomly accessing a large stream. The + first pass through the stream can periodically record the inflate state, + allowing restarting inflate at those points when randomly accessing the + stream. + + inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); +/* + This function is equivalent to inflateEnd followed by inflateInit, + but does not free and reallocate the internal decompression state. The + stream will keep attributes that may have been set by inflateInit2. + + inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, + int windowBits)); +/* + This function is the same as inflateReset, but it also permits changing + the wrap and window size requests. The windowBits parameter is interpreted + the same as it is for inflateInit2. If the window size is changed, then the + memory allocated for the window is freed, and the window will be reallocated + by inflate() if needed. + + inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL), or if + the windowBits parameter is invalid. +*/ + +ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + This function inserts bits in the inflate input stream. The intent is + that this function is used to start inflating at a bit position in the + middle of a byte. The provided bits will be used before any bytes are used + from next_in. This function should only be used with raw inflate, and + should be used before the first inflate() call after inflateInit2() or + inflateReset(). bits must be less than or equal to 16, and that many of the + least significant bits of value will be inserted in the input. + + If bits is negative, then the input stream bit buffer is emptied. Then + inflatePrime() can be called again to put bits in the buffer. This is used + to clear out bits leftover after feeding inflate a block description prior + to feeding inflate codes. + + inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm)); +/* + This function returns two values, one in the lower 16 bits of the return + value, and the other in the remaining upper bits, obtained by shifting the + return value down 16 bits. If the upper value is -1 and the lower value is + zero, then inflate() is currently decoding information outside of a block. + If the upper value is -1 and the lower value is non-zero, then inflate is in + the middle of a stored block, with the lower value equaling the number of + bytes from the input remaining to copy. If the upper value is not -1, then + it is the number of bits back from the current bit position in the input of + the code (literal or length/distance pair) currently being processed. In + that case the lower value is the number of bytes already emitted for that + code. + + A code is being processed if inflate is waiting for more input to complete + decoding of the code, or if it has completed decoding but is waiting for + more output space to write the literal or match data. + + inflateMark() is used to mark locations in the input data for random + access, which may be at bit positions, and to note those cases where the + output of a code may span boundaries of random access blocks. The current + location in the input stream can be determined from avail_in and data_type + as noted in the description for the Z_BLOCK flush parameter for inflate. + + inflateMark returns the value noted above, or -65536 if the provided + source stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm, + gz_headerp head)); +/* + inflateGetHeader() requests that gzip header information be stored in the + provided gz_header structure. inflateGetHeader() may be called after + inflateInit2() or inflateReset(), and before the first call of inflate(). + As inflate() processes the gzip stream, head->done is zero until the header + is completed, at which time head->done is set to one. If a zlib stream is + being decoded, then head->done is set to -1 to indicate that there will be + no gzip header information forthcoming. Note that Z_BLOCK or Z_TREES can be + used to force inflate() to return immediately after header processing is + complete and before any actual data is decompressed. + + The text, time, xflags, and os fields are filled in with the gzip header + contents. hcrc is set to true if there is a header CRC. (The header CRC + was valid if done is set to one.) If extra is not Z_NULL, then extra_max + contains the maximum number of bytes to write to extra. Once done is true, + extra_len contains the actual extra field length, and extra contains the + extra field, or that field truncated if extra_max is less than extra_len. + If name is not Z_NULL, then up to name_max characters are written there, + terminated with a zero unless the length is greater than name_max. If + comment is not Z_NULL, then up to comm_max characters are written there, + terminated with a zero unless the length is greater than comm_max. When any + of extra, name, or comment are not Z_NULL and the respective field is not + present in the header, then that field is set to Z_NULL to signal its + absence. This allows the use of deflateSetHeader() with the returned + structure to duplicate the header. However if those fields are set to + allocated memory, then the application will need to save those pointers + elsewhere so that they can be eventually freed. + + If inflateGetHeader is not used, then the header information is simply + discarded. The header is always checked for validity, including the header + CRC if present. inflateReset() will reset the process to discard the header + information. The application would need to call inflateGetHeader() again to + retrieve the header from the next gzip stream. + + inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits, + unsigned char FAR *window)); + + Initialize the internal stream state for decompression using inflateBack() + calls. The fields zalloc, zfree and opaque in strm must be initialized + before the call. If zalloc and zfree are Z_NULL, then the default library- + derived memory allocation routines are used. windowBits is the base two + logarithm of the window size, in the range 8..15. window is a caller + supplied buffer of that size. Except for special applications where it is + assured that deflate was used with small window sizes, windowBits must be 15 + and a 32K byte window must be supplied to be able to decompress general + deflate streams. + + See inflateBack() for the usage of these routines. + + inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of + the parameters are invalid, Z_MEM_ERROR if the internal state could not be + allocated, or Z_VERSION_ERROR if the version of the library does not match + the version of the header file. +*/ + +typedef unsigned (*in_func) OF((void FAR *, + z_const unsigned char FAR * FAR *)); +typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned)); + +ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, + in_func in, void FAR *in_desc, + out_func out, void FAR *out_desc)); +/* + inflateBack() does a raw inflate with a single call using a call-back + interface for input and output. This is potentially more efficient than + inflate() for file i/o applications, in that it avoids copying between the + output and the sliding window by simply making the window itself the output + buffer. inflate() can be faster on modern CPUs when used with large + buffers. inflateBack() trusts the application to not change the output + buffer passed by the output function, at least until inflateBack() returns. + + inflateBackInit() must be called first to allocate the internal state + and to initialize the state with the user-provided window buffer. + inflateBack() may then be used multiple times to inflate a complete, raw + deflate stream with each call. inflateBackEnd() is then called to free the + allocated state. + + A raw deflate stream is one with no zlib or gzip header or trailer. + This routine would normally be used in a utility that reads zip or gzip + files and writes out uncompressed files. The utility would decode the + header and process the trailer on its own, hence this routine expects only + the raw deflate stream to decompress. This is different from the default + behavior of inflate(), which expects a zlib header and trailer around the + deflate stream. + + inflateBack() uses two subroutines supplied by the caller that are then + called by inflateBack() for input and output. inflateBack() calls those + routines until it reads a complete deflate stream and writes out all of the + uncompressed data, or until it encounters an error. The function's + parameters and return types are defined above in the in_func and out_func + typedefs. inflateBack() will call in(in_desc, &buf) which should return the + number of bytes of provided input, and a pointer to that input in buf. If + there is no input available, in() must return zero -- buf is ignored in that + case -- and inflateBack() will return a buffer error. inflateBack() will + call out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. + out() should return zero on success, or non-zero on failure. If out() + returns non-zero, inflateBack() will return with an error. Neither in() nor + out() are permitted to change the contents of the window provided to + inflateBackInit(), which is also the buffer that out() uses to write from. + The length written by out() will be at most the window size. Any non-zero + amount of input may be provided by in(). + + For convenience, inflateBack() can be provided input on the first call by + setting strm->next_in and strm->avail_in. If that input is exhausted, then + in() will be called. Therefore strm->next_in must be initialized before + calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called + immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in + must also be initialized, and then if strm->avail_in is not zero, input will + initially be taken from strm->next_in[0 .. strm->avail_in - 1]. + + The in_desc and out_desc parameters of inflateBack() is passed as the + first parameter of in() and out() respectively when they are called. These + descriptors can be optionally used to pass any information that the caller- + supplied in() and out() functions need to do their job. + + On return, inflateBack() will set strm->next_in and strm->avail_in to + pass back any unused input that was provided by the last in() call. The + return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR + if in() or out() returned an error, Z_DATA_ERROR if there was a format error + in the deflate stream (in which case strm->msg is set to indicate the nature + of the error), or Z_STREAM_ERROR if the stream was not properly initialized. + In the case of Z_BUF_ERROR, an input or output error can be distinguished + using strm->next_in which will be Z_NULL only if in() returned an error. If + strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning + non-zero. (in() will always be called before out(), so strm->next_in is + assured to be defined if out() returns non-zero.) Note that inflateBack() + cannot return Z_OK. +*/ + +ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm)); +/* + All memory allocated by inflateBackInit() is freed. + + inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream + state was inconsistent. +*/ + +ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void)); +/* Return flags indicating compile-time options. + + Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other: + 1.0: size of uInt + 3.2: size of uLong + 5.4: size of voidpf (pointer) + 7.6: size of z_off_t + + Compiler, assembler, and debug options: + 8: ZLIB_DEBUG + 9: ASMV or ASMINF -- use ASM code + 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention + 11: 0 (reserved) + + One-time table building (smaller code, but not thread-safe if true): + 12: BUILDFIXED -- build static block decoding tables when needed + 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed + 14,15: 0 (reserved) + + Library content (indicates missing functionality): + 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking + deflate code when not needed) + 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect + and decode gzip streams (to avoid linking crc code) + 18-19: 0 (reserved) + + Operation variations (changes in library functionality): + 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate + 21: FASTEST -- deflate algorithm with only one, lowest compression level + 22,23: 0 (reserved) + + The sprintf variant used by gzprintf (zero is best): + 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format + 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure! + 26: 0 = returns value, 1 = void -- 1 means inferred string length returned + + Remainder: + 27-31: 0 (reserved) + */ + +#ifndef Z_SOLO + + /* utility functions */ + +/* + The following utility functions are implemented on top of the basic + stream-oriented functions. To simplify the interface, some default options + are assumed (compression level and memory usage, standard memory allocation + functions). The source code of these utility functions can be modified if + you need special options. +*/ + +ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Compresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed data. compress() is equivalent to compress2() with a level + parameter of Z_DEFAULT_COMPRESSION. + + compress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer. +*/ + +ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen, + int level)); +/* + Compresses the source buffer into the destination buffer. The level + parameter has the same meaning as in deflateInit. sourceLen is the byte + length of the source buffer. Upon entry, destLen is the total size of the + destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed data. + + compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_BUF_ERROR if there was not enough room in the output buffer, + Z_STREAM_ERROR if the level parameter is invalid. +*/ + +ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen)); +/* + compressBound() returns an upper bound on the compressed size after + compress() or compress2() on sourceLen bytes. It would be used before a + compress() or compress2() call to allocate the destination buffer. +*/ + +ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Decompresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be large enough to hold the entire + uncompressed data. (The size of the uncompressed data must have been saved + previously by the compressor and transmitted to the decompressor by some + mechanism outside the scope of this compression library.) Upon exit, destLen + is the actual size of the uncompressed data. + + uncompress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. In + the case where there is not enough room, uncompress() will fill the output + buffer with the uncompressed data up to that point. +*/ + +ZEXTERN int ZEXPORT uncompress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong *sourceLen)); +/* + Same as uncompress, except that sourceLen is a pointer, where the + length of the source is *sourceLen. On return, *sourceLen is the number of + source bytes consumed. +*/ + + /* gzip file access functions */ + +/* + This library supports reading and writing files in gzip (.gz) format with + an interface similar to that of stdio, using the functions that start with + "gz". The gzip format is different from the zlib format. gzip is a gzip + wrapper, documented in RFC 1952, wrapped around a deflate stream. +*/ + +typedef struct gzFile_s *gzFile; /* semi-opaque gzip file descriptor */ + +/* +ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); + + Opens a gzip (.gz) file for reading or writing. The mode parameter is as + in fopen ("rb" or "wb") but can also include a compression level ("wb9") or + a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only + compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F' + for fixed code compression as in "wb9F". (See the description of + deflateInit2 for more information about the strategy parameter.) 'T' will + request transparent writing or appending with no compression and not using + the gzip format. + + "a" can be used instead of "w" to request that the gzip stream that will + be written be appended to the file. "+" will result in an error, since + reading and writing to the same gzip file is not supported. The addition of + "x" when writing will create the file exclusively, which fails if the file + already exists. On systems that support it, the addition of "e" when + reading or writing will set the flag to close the file on an execve() call. + + These functions, as well as gzip, will read and decode a sequence of gzip + streams in a file. The append function of gzopen() can be used to create + such a file. (Also see gzflush() for another way to do this.) When + appending, gzopen does not test whether the file begins with a gzip stream, + nor does it look for the end of the gzip streams to begin appending. gzopen + will simply append a gzip stream to the existing file. + + gzopen can be used to read a file which is not in gzip format; in this + case gzread will directly read from the file without decompression. When + reading, this will be detected automatically by looking for the magic two- + byte gzip header. + + gzopen returns NULL if the file could not be opened, if there was + insufficient memory to allocate the gzFile state, or if an invalid mode was + specified (an 'r', 'w', or 'a' was not provided, or '+' was provided). + errno can be checked to determine if the reason gzopen failed was that the + file could not be opened. +*/ + +ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode)); +/* + gzdopen associates a gzFile with the file descriptor fd. File descriptors + are obtained from calls like open, dup, creat, pipe or fileno (if the file + has been previously opened with fopen). The mode parameter is as in gzopen. + + The next call of gzclose on the returned gzFile will also close the file + descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor + fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, + mode);. The duplicated descriptor should be saved to avoid a leak, since + gzdopen does not close fd if it fails. If you are using fileno() to get the + file descriptor from a FILE *, then you will have to use dup() to avoid + double-close()ing the file descriptor. Both gzclose() and fclose() will + close the associated file descriptor, so they need to have different file + descriptors. + + gzdopen returns NULL if there was insufficient memory to allocate the + gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not + provided, or '+' was provided), or if fd is -1. The file descriptor is not + used until the next gz* read, write, seek, or close operation, so gzdopen + will not detect if fd is invalid (unless fd is -1). +*/ + +ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size)); +/* + Set the internal buffer size used by this library's functions. The + default buffer size is 8192 bytes. This function must be called after + gzopen() or gzdopen(), and before any other calls that read or write the + file. The buffer memory allocation is always deferred to the first read or + write. Three times that size in buffer space is allocated. A larger buffer + size of, for example, 64K or 128K bytes will noticeably increase the speed + of decompression (reading). + + The new buffer size also affects the maximum length for gzprintf(). + + gzbuffer() returns 0 on success, or -1 on failure, such as being called + too late. +*/ + +ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); +/* + Dynamically update the compression level or strategy. See the description + of deflateInit2 for the meaning of these parameters. Previously provided + data is flushed before the parameter change. + + gzsetparams returns Z_OK if success, Z_STREAM_ERROR if the file was not + opened for writing, Z_ERRNO if there is an error writing the flushed data, + or Z_MEM_ERROR if there is a memory allocation error. +*/ + +ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); +/* + Reads the given number of uncompressed bytes from the compressed file. If + the input file is not in gzip format, gzread copies the given number of + bytes into the buffer directly from the file. + + After reaching the end of a gzip stream in the input, gzread will continue + to read, looking for another gzip stream. Any number of gzip streams may be + concatenated in the input file, and will all be decompressed by gzread(). + If something other than a gzip stream is encountered after a gzip stream, + that remaining trailing garbage is ignored (and no error is returned). + + gzread can be used to read a gzip file that is being concurrently written. + Upon reaching the end of the input, gzread will return with the available + data. If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then + gzclearerr can be used to clear the end of file indicator in order to permit + gzread to be tried again. Z_OK indicates that a gzip stream was completed + on the last gzread. Z_BUF_ERROR indicates that the input file ended in the + middle of a gzip stream. Note that gzread does not return -1 in the event + of an incomplete gzip stream. This error is deferred until gzclose(), which + will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip + stream. Alternatively, gzerror can be used before gzclose to detect this + case. + + gzread returns the number of uncompressed bytes actually read, less than + len for end of file, or -1 for error. If len is too large to fit in an int, + then nothing is read, -1 is returned, and the error state is set to + Z_STREAM_ERROR. +*/ + +ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems, + gzFile file)); +/* + Read up to nitems items of size size from file to buf, otherwise operating + as gzread() does. This duplicates the interface of stdio's fread(), with + size_t request and return types. If the library defines size_t, then + z_size_t is identical to size_t. If not, then z_size_t is an unsigned + integer type that can contain a pointer. + + gzfread() returns the number of full items read of size size, or zero if + the end of the file was reached and a full item could not be read, or if + there was an error. gzerror() must be consulted if zero is returned in + order to determine if there was an error. If the multiplication of size and + nitems overflows, i.e. the product does not fit in a z_size_t, then nothing + is read, zero is returned, and the error state is set to Z_STREAM_ERROR. + + In the event that the end of file is reached and only a partial item is + available at the end, i.e. the remaining uncompressed data length is not a + multiple of size, then the final partial item is nevetheless read into buf + and the end-of-file flag is set. The length of the partial item read is not + provided, but could be inferred from the result of gztell(). This behavior + is the same as the behavior of fread() implementations in common libraries, + but it prevents the direct use of gzfread() to read a concurrently written + file, reseting and retrying on end-of-file, when size is not 1. +*/ + +ZEXTERN int ZEXPORT gzwrite OF((gzFile file, + voidpc buf, unsigned len)); +/* + Writes the given number of uncompressed bytes into the compressed file. + gzwrite returns the number of uncompressed bytes written or 0 in case of + error. +*/ + +ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size, + z_size_t nitems, gzFile file)); +/* + gzfwrite() writes nitems items of size size from buf to file, duplicating + the interface of stdio's fwrite(), with size_t request and return types. If + the library defines size_t, then z_size_t is identical to size_t. If not, + then z_size_t is an unsigned integer type that can contain a pointer. + + gzfwrite() returns the number of full items written of size size, or zero + if there was an error. If the multiplication of size and nitems overflows, + i.e. the product does not fit in a z_size_t, then nothing is written, zero + is returned, and the error state is set to Z_STREAM_ERROR. +*/ + +ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...)); +/* + Converts, formats, and writes the arguments to the compressed file under + control of the format string, as in fprintf. gzprintf returns the number of + uncompressed bytes actually written, or a negative zlib error code in case + of error. The number of uncompressed bytes written is limited to 8191, or + one less than the buffer size given to gzbuffer(). The caller should assure + that this limit is not exceeded. If it is exceeded, then gzprintf() will + return an error (0) with nothing written. In this case, there may also be a + buffer overflow with unpredictable consequences, which is possible only if + zlib was compiled with the insecure functions sprintf() or vsprintf() + because the secure snprintf() or vsnprintf() functions were not available. + This can be determined using zlibCompileFlags(). +*/ + +ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); +/* + Writes the given null-terminated string to the compressed file, excluding + the terminating null character. + + gzputs returns the number of characters written, or -1 in case of error. +*/ + +ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len)); +/* + Reads bytes from the compressed file until len-1 characters are read, or a + newline character is read and transferred to buf, or an end-of-file + condition is encountered. If any characters are read or if len == 1, the + string is terminated with a null character. If no characters are read due + to an end-of-file or len < 1, then the buffer is left untouched. + + gzgets returns buf which is a null-terminated string, or it returns NULL + for end-of-file or in case of error. If there was an error, the contents at + buf are indeterminate. +*/ + +ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c)); +/* + Writes c, converted to an unsigned char, into the compressed file. gzputc + returns the value that was written, or -1 in case of error. +*/ + +ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); +/* + Reads one byte from the compressed file. gzgetc returns this byte or -1 + in case of end of file or error. This is implemented as a macro for speed. + As such, it does not do all of the checking the other functions do. I.e. + it does not check to see if file is NULL, nor whether the structure file + points to has been clobbered or not. +*/ + +ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); +/* + Push one character back onto the stream to be read as the first character + on the next read. At least one character of push-back is allowed. + gzungetc() returns the character pushed, or -1 on failure. gzungetc() will + fail if c is -1, and may fail if a character has been pushed but not read + yet. If gzungetc is used immediately after gzopen or gzdopen, at least the + output buffer size of pushed characters is allowed. (See gzbuffer above.) + The pushed character will be discarded if the stream is repositioned with + gzseek() or gzrewind(). +*/ + +ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); +/* + Flushes all pending output into the compressed file. The parameter flush + is as in the deflate() function. The return value is the zlib error number + (see function gzerror below). gzflush is only permitted when writing. + + If the flush parameter is Z_FINISH, the remaining data is written and the + gzip stream is completed in the output. If gzwrite() is called again, a new + gzip stream will be started in the output. gzread() is able to read such + concatenated gzip streams. + + gzflush should be called only when strictly necessary because it will + degrade compression if called too often. +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, + z_off_t offset, int whence)); + + Sets the starting position for the next gzread or gzwrite on the given + compressed file. The offset represents a number of bytes in the + uncompressed data stream. The whence parameter is defined as in lseek(2); + the value SEEK_END is not supported. + + If the file is opened for reading, this function is emulated but can be + extremely slow. If the file is opened for writing, only forward seeks are + supported; gzseek then compresses a sequence of zeroes up to the new + starting position. + + gzseek returns the resulting offset location as measured in bytes from + the beginning of the uncompressed stream, or -1 in case of error, in + particular if the file is opened for writing and the new starting position + would be before the current position. +*/ + +ZEXTERN int ZEXPORT gzrewind OF((gzFile file)); +/* + Rewinds the given file. This function is supported only for reading. + + gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file)); + + Returns the starting position for the next gzread or gzwrite on the given + compressed file. This position represents a number of bytes in the + uncompressed data stream, and is zero when starting, even if appending or + reading a gzip stream from the middle of a file using gzdopen(). + + gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file)); + + Returns the current offset in the file being read or written. This offset + includes the count of bytes that precede the gzip stream, for example when + appending or when using gzdopen() for reading. When reading, the offset + does not include as yet unused buffered input. This information can be used + for a progress indicator. On error, gzoffset() returns -1. +*/ + +ZEXTERN int ZEXPORT gzeof OF((gzFile file)); +/* + Returns true (1) if the end-of-file indicator has been set while reading, + false (0) otherwise. Note that the end-of-file indicator is set only if the + read tried to go past the end of the input, but came up short. Therefore, + just like feof(), gzeof() may return false even if there is no more data to + read, in the event that the last read request was for the exact number of + bytes remaining in the input file. This will happen if the input file size + is an exact multiple of the buffer size. + + If gzeof() returns true, then the read functions will return no more data, + unless the end-of-file indicator is reset by gzclearerr() and the input file + has grown since the previous end of file was detected. +*/ + +ZEXTERN int ZEXPORT gzdirect OF((gzFile file)); +/* + Returns true (1) if file is being copied directly while reading, or false + (0) if file is a gzip stream being decompressed. + + If the input file is empty, gzdirect() will return true, since the input + does not contain a gzip stream. + + If gzdirect() is used immediately after gzopen() or gzdopen() it will + cause buffers to be allocated to allow reading the file to determine if it + is a gzip file. Therefore if gzbuffer() is used, it should be called before + gzdirect(). + + When writing, gzdirect() returns true (1) if transparent writing was + requested ("wT" for the gzopen() mode), or false (0) otherwise. (Note: + gzdirect() is not needed when writing. Transparent writing must be + explicitly requested, so the application already knows the answer. When + linking statically, using gzdirect() will include all of the zlib code for + gzip file reading and decompression, which may not be desired.) +*/ + +ZEXTERN int ZEXPORT gzclose OF((gzFile file)); +/* + Flushes all pending output if necessary, closes the compressed file and + deallocates the (de)compression state. Note that once file is closed, you + cannot call gzerror with file, since its structures have been deallocated. + gzclose must not be called more than once on the same file, just as free + must not be called more than once on the same allocation. + + gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a + file operation error, Z_MEM_ERROR if out of memory, Z_BUF_ERROR if the + last read ended in the middle of a gzip stream, or Z_OK on success. +*/ + +ZEXTERN int ZEXPORT gzclose_r OF((gzFile file)); +ZEXTERN int ZEXPORT gzclose_w OF((gzFile file)); +/* + Same as gzclose(), but gzclose_r() is only for use when reading, and + gzclose_w() is only for use when writing or appending. The advantage to + using these instead of gzclose() is that they avoid linking in zlib + compression or decompression code that is not used when only reading or only + writing respectively. If gzclose() is used, then both compression and + decompression code will be included the application when linking to a static + zlib library. +*/ + +ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum)); +/* + Returns the error message for the last error which occurred on the given + compressed file. errnum is set to zlib error number. If an error occurred + in the file system and not in the compression library, errnum is set to + Z_ERRNO and the application may consult errno to get the exact error code. + + The application must not modify the returned string. Future calls to + this function may invalidate the previously returned string. If file is + closed, then the string previously returned by gzerror will no longer be + available. + + gzerror() should be used to distinguish errors from end-of-file for those + functions above that do not distinguish those cases in their return values. +*/ + +ZEXTERN void ZEXPORT gzclearerr OF((gzFile file)); +/* + Clears the error and end-of-file flags for file. This is analogous to the + clearerr() function in stdio. This is useful for continuing to read a gzip + file that is being written concurrently. +*/ + +#endif /* !Z_SOLO */ + + /* checksum functions */ + +/* + These functions are not related to compression but are exported + anyway because they might be useful in applications using the compression + library. +*/ + +ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); +/* + Update a running Adler-32 checksum with the bytes buf[0..len-1] and + return the updated checksum. If buf is Z_NULL, this function returns the + required initial value for the checksum. + + An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed + much faster. + + Usage example: + + uLong adler = adler32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + adler = adler32(adler, buffer, length); + } + if (adler != original_adler) error(); +*/ + +ZEXTERN uLong ZEXPORT adler32_z OF((uLong adler, const Bytef *buf, + z_size_t len)); +/* + Same as adler32(), but with a size_t length. +*/ + +/* +ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, + z_off_t len2)); + + Combine two Adler-32 checksums into one. For two sequences of bytes, seq1 + and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for + each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of + seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. Note + that the z_off_t type (like off_t) is a signed integer. If len2 is + negative, the result has no meaning or utility. +*/ + +ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); +/* + Update a running CRC-32 with the bytes buf[0..len-1] and return the + updated CRC-32. If buf is Z_NULL, this function returns the required + initial value for the crc. Pre- and post-conditioning (one's complement) is + performed within this function so it shouldn't be done by the application. + + Usage example: + + uLong crc = crc32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + crc = crc32(crc, buffer, length); + } + if (crc != original_crc) error(); +*/ + +ZEXTERN uLong ZEXPORT crc32_z OF((uLong adler, const Bytef *buf, + z_size_t len)); +/* + Same as crc32(), but with a size_t length. +*/ + +/* +ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); + + Combine two CRC-32 check values into one. For two sequences of bytes, + seq1 and seq2 with lengths len1 and len2, CRC-32 check values were + calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32 + check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and + len2. +*/ + + + /* various hacks, don't look :) */ + +/* deflateInit and inflateInit are macros to allow checking the zlib version + * and the compiler's view of z_stream: + */ +ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method, + int windowBits, int memLevel, + int strategy, const char *version, + int stream_size)); +ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits, + unsigned char FAR *window, + const char *version, + int stream_size)); +#ifdef Z_PREFIX_SET +# define z_deflateInit(strm, level) \ + deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_inflateInit(strm) \ + inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ + deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ + (strategy), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_inflateInit2(strm, windowBits) \ + inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ + (int)sizeof(z_stream)) +# define z_inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, (int)sizeof(z_stream)) +#else +# define deflateInit(strm, level) \ + deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) +# define inflateInit(strm) \ + inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) +# define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ + deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ + (strategy), ZLIB_VERSION, (int)sizeof(z_stream)) +# define inflateInit2(strm, windowBits) \ + inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ + (int)sizeof(z_stream)) +# define inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, (int)sizeof(z_stream)) +#endif + +#ifndef Z_SOLO + +/* gzgetc() macro and its supporting function and exposed data structure. Note + * that the real internal state is much larger than the exposed structure. + * This abbreviated structure exposes just enough for the gzgetc() macro. The + * user should not mess with these exposed elements, since their names or + * behavior could change in the future, perhaps even capriciously. They can + * only be used by the gzgetc() macro. You have been warned. + */ +struct gzFile_s { + unsigned have; + unsigned char *next; + z_off64_t pos; +}; +ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */ +#ifdef Z_PREFIX_SET +# undef z_gzgetc +# define z_gzgetc(g) \ + ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g)) +#else +# define gzgetc(g) \ + ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g)) +#endif + +/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or + * change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if + * both are true, the application gets the *64 functions, and the regular + * functions are changed to 64 bits) -- in case these are set on systems + * without large file support, _LFS64_LARGEFILE must also be true + */ +#ifdef Z_LARGE64 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); + ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t)); +#endif + +#if !defined(ZLIB_INTERNAL) && defined(Z_WANT64) +# ifdef Z_PREFIX_SET +# define z_gzopen z_gzopen64 +# define z_gzseek z_gzseek64 +# define z_gztell z_gztell64 +# define z_gzoffset z_gzoffset64 +# define z_adler32_combine z_adler32_combine64 +# define z_crc32_combine z_crc32_combine64 +# else +# define gzopen gzopen64 +# define gzseek gzseek64 +# define gztell gztell64 +# define gzoffset gzoffset64 +# define adler32_combine adler32_combine64 +# define crc32_combine crc32_combine64 +# endif +# ifndef Z_LARGE64 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); +# endif +#else + ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); +#endif + +#else /* Z_SOLO */ + + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); + +#endif /* !Z_SOLO */ + +/* undocumented functions */ +ZEXTERN const char * ZEXPORT zError OF((int)); +ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); +ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void)); +ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); +ZEXTERN int ZEXPORT inflateValidate OF((z_streamp, int)); +ZEXTERN unsigned long ZEXPORT inflateCodesUsed OF ((z_streamp)); +ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp)); +ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp)); +#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO) +ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path, + const char *mode)); +#endif +#if defined(STDC) || defined(Z_HAVE_STDARG_H) +# ifndef Z_SOLO +ZEXTERN int ZEXPORTVA gzvprintf Z_ARG((gzFile file, + const char *format, + va_list va)); +# endif +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* ZLIB_H */ diff --git a/client/qt_gl_/yuvgl/librtmp/hashswf.c b/client/qt_gl_/yuvgl/librtmp/hashswf.c index 6ec31c0..b0bec65 100644 --- a/client/qt_gl_/yuvgl/librtmp/hashswf.c +++ b/client/qt_gl_/yuvgl/librtmp/hashswf.c @@ -66,6 +66,7 @@ extern void RTMP_TLS_Init(); extern TLS_CTX RTMP_TLS_ctx; #include +#include "strncasecmp.h" #endif /* CRYPTO */ diff --git a/client/qt_gl_/yuvgl/librtmp/parseurl.c b/client/qt_gl_/yuvgl/librtmp/parseurl.c index 646c70c..5b915b9 100644 --- a/client/qt_gl_/yuvgl/librtmp/parseurl.c +++ b/client/qt_gl_/yuvgl/librtmp/parseurl.c @@ -29,6 +29,7 @@ #include "rtmp_sys.h" #include "log.h" +#include "strncasecmp.h" int RTMP_ParseURL(const char *url, int *protocol, AVal *host, unsigned int *port, AVal *playpath, AVal *app) diff --git a/client/qt_gl_/yuvgl/librtmp/rtmp.c b/client/qt_gl_/yuvgl/librtmp/rtmp.c index fbbf65e..261583e 100644 --- a/client/qt_gl_/yuvgl/librtmp/rtmp.c +++ b/client/qt_gl_/yuvgl/librtmp/rtmp.c @@ -31,6 +31,7 @@ #include "rtmp_sys.h" #include "log.h" +#include "strncasecmp.h" #ifdef CRYPTO #ifdef USE_POLARSSL @@ -1165,7 +1166,7 @@ RTMP_ToggleStream(RTMP *r) return res; r->m_pausing = 1; - sleep(1); + msleep(1000); } res = RTMP_SendPause(r, FALSE, r->m_pauseStamp); r->m_pausing = 3; @@ -1524,10 +1525,10 @@ RTMP_ClientPacket(RTMP *r, RTMPPacket *packet) return bHasMediaPacket; } -#ifdef _DEBUG -extern FILE *netstackdump; -extern FILE *netstackdump_read; -#endif +//#ifdef _DEBUG +//extern FILE *netstackdump; +//extern FILE *netstackdump_read; +//#endif // @remark debug info by http://github.com/ossrs/srs unsigned long _srs_rbytes = 0; @@ -1620,7 +1621,7 @@ ReadN(RTMP *r, char *buffer, int n) } /*RTMP_Log(RTMP_LOGDEBUG, "%s: %d bytes\n", __FUNCTION__, nBytes); */ #ifdef _DEBUG - fwrite(ptr, 1, nBytes, netstackdump_read); +// fwrite(ptr, 1, nBytes, netstackdump_read); #endif if (nBytes == 0) @@ -4469,7 +4470,7 @@ RTMPSockBuf_Send(RTMPSockBuf *sb, const char *buf, int len) int rc; #ifdef _DEBUG - fwrite(buf, 1, len, netstackdump); +// fwrite(buf, 1, len, netstackdump); #endif #if defined(CRYPTO) && !defined(NO_SSL) diff --git a/client/qt_gl_/yuvgl/librtmp/strncasecmp.h b/client/qt_gl_/yuvgl/librtmp/strncasecmp.h new file mode 100644 index 0000000..0e6dfb1 --- /dev/null +++ b/client/qt_gl_/yuvgl/librtmp/strncasecmp.h @@ -0,0 +1,17 @@ +#ifndef STRNCASECMP_H +#define STRNCASECMP_H + + +#ifndef WINSHIT_INCLUDED +#define WINSHIT_INCLUDED + +#if defined(WIN32) || defined(WIN64) +#define strcasecmp _stricmp +#define strncasecmp(x,y,z) _strnicmp(x,y,z) + +#endif /* Def WIN32 or Def WIN64 */ + +#endif /* Ndef WINSHIT_INCLUDED */ + + +#endif // STRNCASECMP_H diff --git a/client/qt_gl_/yuvgl/librtmp/zlib.h b/client/qt_gl_/yuvgl/librtmp/zlib.h new file mode 100644 index 0000000..32c2ce0 --- /dev/null +++ b/client/qt_gl_/yuvgl/librtmp/zlib.h @@ -0,0 +1,1916 @@ +/* zlib.h -- interface of the 'zlib' general purpose compression library + version 1.2.11, January 15th, 2017 + + Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + + Jean-loup Gailly Mark Adler + jloup@gzip.org madler@alumni.caltech.edu + + + The data format used by the zlib library is described by RFCs (Request for + Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950 + (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format). +*/ + +#ifndef ZLIB_H +#define ZLIB_H + +#include "zconf.h" + +#include +#undef ZEXTERN +#define ZEXTERN Q_CORE_EXPORT + +#ifdef __cplusplus +extern "C" { +#endif + +#define ZLIB_VERSION "1.2.11 (Qt)" +#define ZLIB_VERNUM 0x12b0f +#define ZLIB_VER_MAJOR 1 +#define ZLIB_VER_MINOR 2 +#define ZLIB_VER_REVISION 11 +#define ZLIB_VER_SUBREVISION 0 + +/* + The 'zlib' compression library provides in-memory compression and + decompression functions, including integrity checks of the uncompressed data. + This version of the library supports only one compression method (deflation) + but other algorithms will be added later and will have the same stream + interface. + + Compression can be done in a single step if the buffers are large enough, + or can be done by repeated calls of the compression function. In the latter + case, the application must provide more input and/or consume the output + (providing more output space) before each call. + + The compressed data format used by default by the in-memory functions is + the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped + around a deflate stream, which is itself documented in RFC 1951. + + The library also supports reading and writing files in gzip (.gz) format + with an interface similar to that of stdio using the functions that start + with "gz". The gzip format is different from the zlib format. gzip is a + gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. + + This library can optionally read and write gzip and raw deflate streams in + memory as well. + + The zlib format was designed to be compact and fast for use in memory + and on communications channels. The gzip format was designed for single- + file compression on file systems, has a larger header than zlib to maintain + directory information, and uses a different, slower check method than zlib. + + The library does not install any signal handler. The decoder checks + the consistency of the compressed data, so the library should never crash + even in the case of corrupted input. +*/ + +typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); +typedef void (*free_func) OF((voidpf opaque, voidpf address)); + +struct internal_state; + +typedef struct z_stream_s { + z_const Bytef *next_in; /* next input byte */ + uInt avail_in; /* number of bytes available at next_in */ + uLong total_in; /* total number of input bytes read so far */ + + Bytef *next_out; /* next output byte will go here */ + uInt avail_out; /* remaining free space at next_out */ + uLong total_out; /* total number of bytes output so far */ + + z_const char *msg; /* last error message, NULL if no error */ + struct internal_state FAR *state; /* not visible by applications */ + + alloc_func zalloc; /* used to allocate the internal state */ + free_func zfree; /* used to free the internal state */ + voidpf opaque; /* private data object passed to zalloc and zfree */ + + int data_type; /* best guess about the data type: binary or text + for deflate, or the decoding state for inflate */ + uLong adler; /* Adler-32 or CRC-32 value of the uncompressed data */ + uLong reserved; /* reserved for future use */ +} z_stream; + +typedef z_stream FAR *z_streamp; + +/* + gzip header information passed to and from zlib routines. See RFC 1952 + for more details on the meanings of these fields. +*/ +typedef struct gz_header_s { + int text; /* true if compressed data believed to be text */ + uLong time; /* modification time */ + int xflags; /* extra flags (not used when writing a gzip file) */ + int os; /* operating system */ + Bytef *extra; /* pointer to extra field or Z_NULL if none */ + uInt extra_len; /* extra field length (valid if extra != Z_NULL) */ + uInt extra_max; /* space at extra (only when reading header) */ + Bytef *name; /* pointer to zero-terminated file name or Z_NULL */ + uInt name_max; /* space at name (only when reading header) */ + Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */ + uInt comm_max; /* space at comment (only when reading header) */ + int hcrc; /* true if there was or will be a header crc */ + int done; /* true when done reading gzip header (not used + when writing a gzip file) */ +} gz_header; + +typedef gz_header FAR *gz_headerp; + +/* + The application must update next_in and avail_in when avail_in has dropped + to zero. It must update next_out and avail_out when avail_out has dropped + to zero. The application must initialize zalloc, zfree and opaque before + calling the init function. All other fields are set by the compression + library and must not be updated by the application. + + The opaque value provided by the application will be passed as the first + parameter for calls of zalloc and zfree. This can be useful for custom + memory management. The compression library attaches no meaning to the + opaque value. + + zalloc must return Z_NULL if there is not enough memory for the object. + If zlib is used in a multi-threaded application, zalloc and zfree must be + thread safe. In that case, zlib is thread-safe. When zalloc and zfree are + Z_NULL on entry to the initialization function, they are set to internal + routines that use the standard library functions malloc() and free(). + + On 16-bit systems, the functions zalloc and zfree must be able to allocate + exactly 65536 bytes, but will not be required to allocate more than this if + the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers + returned by zalloc for objects of exactly 65536 bytes *must* have their + offset normalized to zero. The default allocation function provided by this + library ensures this (see zutil.c). To reduce memory requirements and avoid + any allocation of 64K objects, at the expense of compression ratio, compile + the library with -DMAX_WBITS=14 (see zconf.h). + + The fields total_in and total_out can be used for statistics or progress + reports. After compression, total_in holds the total size of the + uncompressed data and may be saved for use by the decompressor (particularly + if the decompressor wants to decompress everything in a single step). +*/ + + /* constants */ + +#define Z_NO_FLUSH 0 +#define Z_PARTIAL_FLUSH 1 +#define Z_SYNC_FLUSH 2 +#define Z_FULL_FLUSH 3 +#define Z_FINISH 4 +#define Z_BLOCK 5 +#define Z_TREES 6 +/* Allowed flush values; see deflate() and inflate() below for details */ + +#define Z_OK 0 +#define Z_STREAM_END 1 +#define Z_NEED_DICT 2 +#define Z_ERRNO (-1) +#define Z_STREAM_ERROR (-2) +#define Z_DATA_ERROR (-3) +#define Z_MEM_ERROR (-4) +#define Z_BUF_ERROR (-5) +#define Z_VERSION_ERROR (-6) +/* Return codes for the compression/decompression functions. Negative values + * are errors, positive values are used for special but normal events. + */ + +#define Z_NO_COMPRESSION 0 +#define Z_BEST_SPEED 1 +#define Z_BEST_COMPRESSION 9 +#define Z_DEFAULT_COMPRESSION (-1) +/* compression levels */ + +#define Z_FILTERED 1 +#define Z_HUFFMAN_ONLY 2 +#define Z_RLE 3 +#define Z_FIXED 4 +#define Z_DEFAULT_STRATEGY 0 +/* compression strategy; see deflateInit2() below for details */ + +#define Z_BINARY 0 +#define Z_TEXT 1 +#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */ +#define Z_UNKNOWN 2 +/* Possible values of the data_type field for deflate() */ + +#define Z_DEFLATED 8 +/* The deflate compression method (the only one supported in this version) */ + +#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */ + +#define zlib_version zlibVersion() +/* for compatibility with versions < 1.0.2 */ + + + /* basic functions */ + +ZEXTERN const char * ZEXPORT zlibVersion OF((void)); +/* The application can compare zlibVersion and ZLIB_VERSION for consistency. + If the first character differs, the library code actually used is not + compatible with the zlib.h header file used by the application. This check + is automatically made by deflateInit and inflateInit. + */ + +/* +ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level)); + + Initializes the internal stream state for compression. The fields + zalloc, zfree and opaque must be initialized before by the caller. If + zalloc and zfree are set to Z_NULL, deflateInit updates them to use default + allocation functions. + + The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: + 1 gives best speed, 9 gives best compression, 0 gives no compression at all + (the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION + requests a default compromise between speed and compression (currently + equivalent to level 6). + + deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if level is not a valid compression level, or + Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible + with the version assumed by the caller (ZLIB_VERSION). msg is set to null + if there is no error message. deflateInit does not perform any compression: + this will be done by deflate(). +*/ + + +ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); +/* + deflate compresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. deflate performs one or both of the + following actions: + + - Compress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), next_in and avail_in are updated and + processing will resume at this point for the next call of deflate(). + + - Generate more output starting at next_out and update next_out and avail_out + accordingly. This action is forced if the parameter flush is non zero. + Forcing flush frequently degrades the compression ratio, so this parameter + should be set only when necessary. Some output may be provided even if + flush is zero. + + Before the call of deflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating avail_in or avail_out accordingly; avail_out should + never be zero before the call. The application can consume the compressed + output when it wants, for example when the output buffer is full (avail_out + == 0), or after each call of deflate(). If deflate returns Z_OK and with + zero avail_out, it must be called again after making room in the output + buffer because there might be more output pending. See deflatePending(), + which can be used if desired to determine whether or not there is more ouput + in that case. + + Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to + decide how much data to accumulate before producing output, in order to + maximize compression. + + If the parameter flush is set to Z_SYNC_FLUSH, all pending output is + flushed to the output buffer and the output is aligned on a byte boundary, so + that the decompressor can get all input data available so far. (In + particular avail_in is zero after the call if enough output space has been + provided before the call.) Flushing may degrade compression for some + compression algorithms and so it should be used only when necessary. This + completes the current deflate block and follows it with an empty stored block + that is three bits plus filler bits to the next byte, followed by four bytes + (00 00 ff ff). + + If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the + output buffer, but the output is not aligned to a byte boundary. All of the + input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. + This completes the current deflate block and follows it with an empty fixed + codes block that is 10 bits long. This assures that enough bytes are output + in order for the decompressor to finish the block before the empty fixed + codes block. + + If flush is set to Z_BLOCK, a deflate block is completed and emitted, as + for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to + seven bits of the current block are held to be written as the next byte after + the next deflate block is completed. In this case, the decompressor may not + be provided enough bits at this point in order to complete decompression of + the data provided so far to the compressor. It may need to wait for the next + block to be emitted. This is for advanced applications that need to control + the emission of deflate blocks. + + If flush is set to Z_FULL_FLUSH, all output is flushed as with + Z_SYNC_FLUSH, and the compression state is reset so that decompression can + restart from this point if previous compressed data has been damaged or if + random access is desired. Using Z_FULL_FLUSH too often can seriously degrade + compression. + + If deflate returns with avail_out == 0, this function must be called again + with the same value of the flush parameter and more output space (updated + avail_out), until the flush is complete (deflate returns with non-zero + avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that + avail_out is greater than six to avoid repeated flush markers due to + avail_out == 0 on return. + + If the parameter flush is set to Z_FINISH, pending input is processed, + pending output is flushed and deflate returns with Z_STREAM_END if there was + enough output space. If deflate returns with Z_OK or Z_BUF_ERROR, this + function must be called again with Z_FINISH and more output space (updated + avail_out) but no more input data, until it returns with Z_STREAM_END or an + error. After deflate has returned Z_STREAM_END, the only possible operations + on the stream are deflateReset or deflateEnd. + + Z_FINISH can be used in the first deflate call after deflateInit if all the + compression is to be done in a single step. In order to complete in one + call, avail_out must be at least the value returned by deflateBound (see + below). Then deflate is guaranteed to return Z_STREAM_END. If not enough + output space is provided, deflate will not return Z_STREAM_END, and it must + be called again as described above. + + deflate() sets strm->adler to the Adler-32 checksum of all input read + so far (that is, total_in bytes). If a gzip stream is being generated, then + strm->adler will be the CRC-32 checksum of the input read so far. (See + deflateInit2 below.) + + deflate() may update strm->data_type if it can make a good guess about + the input data type (Z_BINARY or Z_TEXT). If in doubt, the data is + considered binary. This field is only for information purposes and does not + affect the compression algorithm in any manner. + + deflate() returns Z_OK if some progress has been made (more input + processed or more output produced), Z_STREAM_END if all input has been + consumed and all output has been produced (only when flush is set to + Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example + if next_in or next_out was Z_NULL or the state was inadvertently written over + by the application), or Z_BUF_ERROR if no progress is possible (for example + avail_in or avail_out was zero). Note that Z_BUF_ERROR is not fatal, and + deflate() can be called again with more input and more output space to + continue compressing. +*/ + + +ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the + stream state was inconsistent, Z_DATA_ERROR if the stream was freed + prematurely (some input or output was discarded). In the error case, msg + may be set but then points to a static string (which must not be + deallocated). +*/ + + +/* +ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); + + Initializes the internal stream state for decompression. The fields + next_in, avail_in, zalloc, zfree and opaque must be initialized before by + the caller. In the current version of inflate, the provided input is not + read or consumed. The allocation of a sliding window will be deferred to + the first call of inflate (if the decompression does not complete on the + first call). If zalloc and zfree are set to Z_NULL, inflateInit updates + them to use default allocation functions. + + inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit does not perform any decompression. + Actual decompression will be done by inflate(). So next_in, and avail_in, + next_out, and avail_out are unused and unchanged. The current + implementation of inflateInit() does not process any header information -- + that is deferred until inflate() is called. +*/ + + +ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); +/* + inflate decompresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. inflate performs one or both of the + following actions: + + - Decompress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), then next_in and avail_in are updated + accordingly, and processing will resume at this point for the next call of + inflate(). + + - Generate more output starting at next_out and update next_out and avail_out + accordingly. inflate() provides as much output as possible, until there is + no more input data or no more space in the output buffer (see below about + the flush parameter). + + Before the call of inflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating the next_* and avail_* values accordingly. If the + caller of inflate() does not provide both available input and available + output space, it is possible that there will be no progress made. The + application can consume the uncompressed output when it wants, for example + when the output buffer is full (avail_out == 0), or after each call of + inflate(). If inflate returns Z_OK and with zero avail_out, it must be + called again after making room in the output buffer because there might be + more output pending. + + The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH, + Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much + output as possible to the output buffer. Z_BLOCK requests that inflate() + stop if and when it gets to the next deflate block boundary. When decoding + the zlib or gzip format, this will cause inflate() to return immediately + after the header and before the first block. When doing a raw inflate, + inflate() will go ahead and process the first block, and will return when it + gets to the end of that block, or when it runs out of data. + + The Z_BLOCK option assists in appending to or combining deflate streams. + To assist in this, on return inflate() always sets strm->data_type to the + number of unused bits in the last byte taken from strm->next_in, plus 64 if + inflate() is currently decoding the last block in the deflate stream, plus + 128 if inflate() returned immediately after decoding an end-of-block code or + decoding the complete header up to just before the first byte of the deflate + stream. The end-of-block will not be indicated until all of the uncompressed + data from that block has been written to strm->next_out. The number of + unused bits may in general be greater than seven, except when bit 7 of + data_type is set, in which case the number of unused bits will be less than + eight. data_type is set as noted here every time inflate() returns for all + flush options, and so can be used to determine the amount of currently + consumed input in bits. + + The Z_TREES option behaves as Z_BLOCK does, but it also returns when the + end of each deflate block header is reached, before any actual data in that + block is decoded. This allows the caller to determine the length of the + deflate block header for later use in random access within a deflate block. + 256 is added to the value of strm->data_type when inflate() returns + immediately after reaching the end of the deflate block header. + + inflate() should normally be called until it returns Z_STREAM_END or an + error. However if all decompression is to be performed in a single step (a + single call of inflate), the parameter flush should be set to Z_FINISH. In + this case all pending input is processed and all pending output is flushed; + avail_out must be large enough to hold all of the uncompressed data for the + operation to complete. (The size of the uncompressed data may have been + saved by the compressor for this purpose.) The use of Z_FINISH is not + required to perform an inflation in one step. However it may be used to + inform inflate that a faster approach can be used for the single inflate() + call. Z_FINISH also informs inflate to not maintain a sliding window if the + stream completes, which reduces inflate's memory footprint. If the stream + does not complete, either because not all of the stream is provided or not + enough output space is provided, then a sliding window will be allocated and + inflate() can be called again to continue the operation as if Z_NO_FLUSH had + been used. + + In this implementation, inflate() always flushes as much output as + possible to the output buffer, and always uses the faster approach on the + first call. So the effects of the flush parameter in this implementation are + on the return value of inflate() as noted below, when inflate() returns early + when Z_BLOCK or Z_TREES is used, and when inflate() avoids the allocation of + memory for a sliding window when Z_FINISH is used. + + If a preset dictionary is needed after this call (see inflateSetDictionary + below), inflate sets strm->adler to the Adler-32 checksum of the dictionary + chosen by the compressor and returns Z_NEED_DICT; otherwise it sets + strm->adler to the Adler-32 checksum of all output produced so far (that is, + total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described + below. At the end of the stream, inflate() checks that its computed Adler-32 + checksum is equal to that saved by the compressor and returns Z_STREAM_END + only if the checksum is correct. + + inflate() can decompress and check either zlib-wrapped or gzip-wrapped + deflate data. The header type is detected automatically, if requested when + initializing with inflateInit2(). Any information contained in the gzip + header is not retained unless inflateGetHeader() is used. When processing + gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output + produced so far. The CRC-32 is checked against the gzip trailer, as is the + uncompressed length, modulo 2^32. + + inflate() returns Z_OK if some progress has been made (more input processed + or more output produced), Z_STREAM_END if the end of the compressed data has + been reached and all uncompressed output has been produced, Z_NEED_DICT if a + preset dictionary is needed at this point, Z_DATA_ERROR if the input data was + corrupted (input stream not conforming to the zlib format or incorrect check + value, in which case strm->msg points to a string with a more specific + error), Z_STREAM_ERROR if the stream structure was inconsistent (for example + next_in or next_out was Z_NULL, or the state was inadvertently written over + by the application), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR + if no progress was possible or if there was not enough room in the output + buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and + inflate() can be called again with more input and more output space to + continue decompressing. If Z_DATA_ERROR is returned, the application may + then call inflateSync() to look for a good compression block if a partial + recovery of the data is to be attempted. +*/ + + +ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + inflateEnd returns Z_OK if success, or Z_STREAM_ERROR if the stream state + was inconsistent. +*/ + + + /* Advanced functions */ + +/* + The following functions are needed only in some special applications. +*/ + +/* +ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, + int level, + int method, + int windowBits, + int memLevel, + int strategy)); + + This is another version of deflateInit with more compression options. The + fields next_in, zalloc, zfree and opaque must be initialized before by the + caller. + + The method parameter is the compression method. It must be Z_DEFLATED in + this version of the library. + + The windowBits parameter is the base two logarithm of the window size + (the size of the history buffer). It should be in the range 8..15 for this + version of the library. Larger values of this parameter result in better + compression at the expense of memory usage. The default value is 15 if + deflateInit is used instead. + + For the current implementation of deflate(), a windowBits value of 8 (a + window size of 256 bytes) is not supported. As a result, a request for 8 + will result in 9 (a 512-byte window). In that case, providing 8 to + inflateInit2() will result in an error when the zlib header with 9 is + checked against the initialization of inflate(). The remedy is to not use 8 + with deflateInit2() with this initialization, or at least in that case use 9 + with inflateInit2(). + + windowBits can also be -8..-15 for raw deflate. In this case, -windowBits + determines the window size. deflate() will then generate raw deflate data + with no zlib header or trailer, and will not compute a check value. + + windowBits can also be greater than 15 for optional gzip encoding. Add + 16 to windowBits to write a simple gzip header and trailer around the + compressed data instead of a zlib wrapper. The gzip header will have no + file name, no extra data, no comment, no modification time (set to zero), no + header crc, and the operating system will be set to the appropriate value, + if the operating system was determined at compile time. If a gzip stream is + being written, strm->adler is a CRC-32 instead of an Adler-32. + + For raw deflate or gzip encoding, a request for a 256-byte window is + rejected as invalid, since only the zlib header provides a means of + transmitting the window size to the decompressor. + + The memLevel parameter specifies how much memory should be allocated + for the internal compression state. memLevel=1 uses minimum memory but is + slow and reduces compression ratio; memLevel=9 uses maximum memory for + optimal speed. The default value is 8. See zconf.h for total memory usage + as a function of windowBits and memLevel. + + The strategy parameter is used to tune the compression algorithm. Use the + value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a + filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no + string match), or Z_RLE to limit match distances to one (run-length + encoding). Filtered data consists mostly of small values with a somewhat + random distribution. In this case, the compression algorithm is tuned to + compress them better. The effect of Z_FILTERED is to force more Huffman + coding and less string matching; it is somewhat intermediate between + Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as + fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The + strategy parameter only affects the compression ratio but not the + correctness of the compressed output even if it is not set appropriately. + Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler + decoder for special applications. + + deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid + method), or Z_VERSION_ERROR if the zlib library version (zlib_version) is + incompatible with the version assumed by the caller (ZLIB_VERSION). msg is + set to null if there is no error message. deflateInit2 does not perform any + compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the compression dictionary from the given byte sequence + without producing any compressed output. When using the zlib format, this + function must be called immediately after deflateInit, deflateInit2 or + deflateReset, and before any call of deflate. When doing raw deflate, this + function must be called either before any call of deflate, or immediately + after the completion of a deflate block, i.e. after all input has been + consumed and all output has been delivered when using any of the flush + options Z_BLOCK, Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, or Z_FULL_FLUSH. The + compressor and decompressor must use exactly the same dictionary (see + inflateSetDictionary). + + The dictionary should consist of strings (byte sequences) that are likely + to be encountered later in the data to be compressed, with the most commonly + used strings preferably put towards the end of the dictionary. Using a + dictionary is most useful when the data to be compressed is short and can be + predicted with good accuracy; the data can then be compressed better than + with the default empty dictionary. + + Depending on the size of the compression data structures selected by + deflateInit or deflateInit2, a part of the dictionary may in effect be + discarded, for example if the dictionary is larger than the window size + provided in deflateInit or deflateInit2. Thus the strings most likely to be + useful should be put at the end of the dictionary, not at the front. In + addition, the current implementation of deflate will use at most the window + size minus 262 bytes of the provided dictionary. + + Upon return of this function, strm->adler is set to the Adler-32 value + of the dictionary; the decompressor may later use this value to determine + which dictionary has been used by the compressor. (The Adler-32 value + applies to the whole dictionary even if only a subset of the dictionary is + actually used by the compressor.) If a raw deflate was requested, then the + Adler-32 value is not computed and strm->adler is not set. + + deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent (for example if deflate has already been called for this stream + or if not at a block boundary for raw deflate). deflateSetDictionary does + not perform any compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateGetDictionary OF((z_streamp strm, + Bytef *dictionary, + uInt *dictLength)); +/* + Returns the sliding dictionary being maintained by deflate. dictLength is + set to the number of bytes in the dictionary, and that many bytes are copied + to dictionary. dictionary must have enough space, where 32768 bytes is + always enough. If deflateGetDictionary() is called with dictionary equal to + Z_NULL, then only the dictionary length is returned, and nothing is copied. + Similary, if dictLength is Z_NULL, then it is not set. + + deflateGetDictionary() may return a length less than the window size, even + when more than the window size in input has been provided. It may return up + to 258 bytes less in that case, due to how zlib's implementation of deflate + manages the sliding window and lookahead for matches, where matches can be + up to 258 bytes long. If the application needs the last window-size bytes of + input, then that would need to be saved by the application outside of zlib. + + deflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the + stream state is inconsistent. +*/ + +ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when several compression strategies will be + tried, for example when there are several ways of pre-processing the input + data with a filter. The streams that will be discarded should then be freed + by calling deflateEnd. Note that deflateCopy duplicates the internal + compression state which can be quite large, so this strategy is slow and can + consume lots of memory. + + deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); +/* + This function is equivalent to deflateEnd followed by deflateInit, but + does not free and reallocate the internal compression state. The stream + will leave the compression level and any other attributes that may have been + set unchanged. + + deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, + int level, + int strategy)); +/* + Dynamically update the compression level and compression strategy. The + interpretation of level and strategy is as in deflateInit2(). This can be + used to switch between compression and straight copy of the input data, or + to switch to a different kind of input data requiring a different strategy. + If the compression approach (which is a function of the level) or the + strategy is changed, and if any input has been consumed in a previous + deflate() call, then the input available so far is compressed with the old + level and strategy using deflate(strm, Z_BLOCK). There are three approaches + for the compression levels 0, 1..3, and 4..9 respectively. The new level + and strategy will take effect at the next call of deflate(). + + If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does + not have enough output space to complete, then the parameter change will not + take effect. In this case, deflateParams() can be called again with the + same parameters and more output space to try again. + + In order to assure a change in the parameters on the first try, the + deflate stream should be flushed using deflate() with Z_BLOCK or other flush + request until strm.avail_out is not zero, before calling deflateParams(). + Then no more input data should be provided before the deflateParams() call. + If this is done, the old level and strategy will be applied to the data + compressed before deflateParams(), and the new level and strategy will be + applied to the the data compressed after deflateParams(). + + deflateParams returns Z_OK on success, Z_STREAM_ERROR if the source stream + state was inconsistent or if a parameter was invalid, or Z_BUF_ERROR if + there was not enough output space to complete the compression of the + available input data before a change in the strategy or approach. Note that + in the case of a Z_BUF_ERROR, the parameters are not changed. A return + value of Z_BUF_ERROR is not fatal, in which case deflateParams() can be + retried with more output space. +*/ + +ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, + int good_length, + int max_lazy, + int nice_length, + int max_chain)); +/* + Fine tune deflate's internal compression parameters. This should only be + used by someone who understands the algorithm used by zlib's deflate for + searching for the best matching string, and even then only by the most + fanatic optimizer trying to squeeze out the last compressed bit for their + specific input data. Read the deflate.c source code for the meaning of the + max_lazy, good_length, nice_length, and max_chain parameters. + + deflateTune() can be called after deflateInit() or deflateInit2(), and + returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream. + */ + +ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm, + uLong sourceLen)); +/* + deflateBound() returns an upper bound on the compressed size after + deflation of sourceLen bytes. It must be called after deflateInit() or + deflateInit2(), and after deflateSetHeader(), if used. This would be used + to allocate an output buffer for deflation in a single pass, and so would be + called before deflate(). If that first deflate() call is provided the + sourceLen input bytes, an output buffer allocated to the size returned by + deflateBound(), and the flush value Z_FINISH, then deflate() is guaranteed + to return Z_STREAM_END. Note that it is possible for the compressed size to + be larger than the value returned by deflateBound() if flush options other + than Z_FINISH or Z_NO_FLUSH are used. +*/ + +ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm, + unsigned *pending, + int *bits)); +/* + deflatePending() returns the number of bytes and bits of output that have + been generated, but not yet provided in the available output. The bytes not + provided would be due to the available output space having being consumed. + The number of bits of output not provided are between 0 and 7, where they + await more bits to join them in order to fill out a full byte. If pending + or bits are Z_NULL, then those values are not set. + + deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. + */ + +ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + deflatePrime() inserts bits in the deflate output stream. The intent + is that this function is used to start off the deflate output with the bits + leftover from a previous deflate stream when appending to it. As such, this + function can only be used for raw deflate, and must be used before the first + deflate() call after a deflateInit2() or deflateReset(). bits must be less + than or equal to 16, and that many of the least significant bits of value + will be inserted in the output. + + deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough + room in the internal buffer to insert the bits, or Z_STREAM_ERROR if the + source stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, + gz_headerp head)); +/* + deflateSetHeader() provides gzip header information for when a gzip + stream is requested by deflateInit2(). deflateSetHeader() may be called + after deflateInit2() or deflateReset() and before the first call of + deflate(). The text, time, os, extra field, name, and comment information + in the provided gz_header structure are written to the gzip header (xflag is + ignored -- the extra flags are set according to the compression level). The + caller must assure that, if not Z_NULL, name and comment are terminated with + a zero byte, and that if extra is not Z_NULL, that extra_len bytes are + available there. If hcrc is true, a gzip header crc is included. Note that + the current versions of the command-line version of gzip (up through version + 1.3.x) do not support header crc's, and will report that it is a "multi-part + gzip file" and give up. + + If deflateSetHeader is not used, the default gzip header has text false, + the time set to zero, and os set to 255, with no extra, name, or comment + fields. The gzip header is returned to the default state by deflateReset(). + + deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, + int windowBits)); + + This is another version of inflateInit with an extra parameter. The + fields next_in, avail_in, zalloc, zfree and opaque must be initialized + before by the caller. + + The windowBits parameter is the base two logarithm of the maximum window + size (the size of the history buffer). It should be in the range 8..15 for + this version of the library. The default value is 15 if inflateInit is used + instead. windowBits must be greater than or equal to the windowBits value + provided to deflateInit2() while compressing, or it must be equal to 15 if + deflateInit2() was not used. If a compressed stream with a larger window + size is given as input, inflate() will return with the error code + Z_DATA_ERROR instead of trying to allocate a larger window. + + windowBits can also be zero to request that inflate use the window size in + the zlib header of the compressed stream. + + windowBits can also be -8..-15 for raw inflate. In this case, -windowBits + determines the window size. inflate() will then process raw deflate data, + not looking for a zlib or gzip header, not generating a check value, and not + looking for any check values for comparison at the end of the stream. This + is for use with other formats that use the deflate compressed data format + such as zip. Those formats provide their own check values. If a custom + format is developed using the raw deflate format for compressed data, it is + recommended that a check value such as an Adler-32 or a CRC-32 be applied to + the uncompressed data as is done in the zlib, gzip, and zip formats. For + most applications, the zlib format should be used as is. Note that comments + above on the use in deflateInit2() applies to the magnitude of windowBits. + + windowBits can also be greater than 15 for optional gzip decoding. Add + 32 to windowBits to enable zlib and gzip decoding with automatic header + detection, or add 16 to decode only the gzip format (the zlib format will + return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a + CRC-32 instead of an Adler-32. Unlike the gunzip utility and gzread() (see + below), inflate() will not automatically decode concatenated gzip streams. + inflate() will return Z_STREAM_END at the end of the gzip stream. The state + would need to be reset to continue decoding a subsequent gzip stream. + + inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit2 does not perform any decompression + apart from possibly reading the zlib header if present: actual decompression + will be done by inflate(). (So next_in and avail_in may be modified, but + next_out and avail_out are unused and unchanged.) The current implementation + of inflateInit2() does not process any header information -- that is + deferred until inflate() is called. +*/ + +ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the decompression dictionary from the given uncompressed byte + sequence. This function must be called immediately after a call of inflate, + if that call returned Z_NEED_DICT. The dictionary chosen by the compressor + can be determined from the Adler-32 value returned by that call of inflate. + The compressor and decompressor must use exactly the same dictionary (see + deflateSetDictionary). For raw inflate, this function can be called at any + time to set the dictionary. If the provided dictionary is smaller than the + window and there is already data in the window, then the provided dictionary + will amend what's there. The application must insure that the dictionary + that was used for compression is provided. + + inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the + expected one (incorrect Adler-32 value). inflateSetDictionary does not + perform any decompression: this will be done by subsequent calls of + inflate(). +*/ + +ZEXTERN int ZEXPORT inflateGetDictionary OF((z_streamp strm, + Bytef *dictionary, + uInt *dictLength)); +/* + Returns the sliding dictionary being maintained by inflate. dictLength is + set to the number of bytes in the dictionary, and that many bytes are copied + to dictionary. dictionary must have enough space, where 32768 bytes is + always enough. If inflateGetDictionary() is called with dictionary equal to + Z_NULL, then only the dictionary length is returned, and nothing is copied. + Similary, if dictLength is Z_NULL, then it is not set. + + inflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the + stream state is inconsistent. +*/ + +ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); +/* + Skips invalid compressed data until a possible full flush point (see above + for the description of deflate with Z_FULL_FLUSH) can be found, or until all + available input is skipped. No output is provided. + + inflateSync searches for a 00 00 FF FF pattern in the compressed data. + All full flush points have this pattern, but not all occurrences of this + pattern are full flush points. + + inflateSync returns Z_OK if a possible full flush point has been found, + Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point + has been found, or Z_STREAM_ERROR if the stream structure was inconsistent. + In the success case, the application may save the current current value of + total_in which indicates where valid compressed data was found. In the + error case, the application may repeatedly call inflateSync, providing more + input each time, until success or end of the input data. +*/ + +ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when randomly accessing a large stream. The + first pass through the stream can periodically record the inflate state, + allowing restarting inflate at those points when randomly accessing the + stream. + + inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); +/* + This function is equivalent to inflateEnd followed by inflateInit, + but does not free and reallocate the internal decompression state. The + stream will keep attributes that may have been set by inflateInit2. + + inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, + int windowBits)); +/* + This function is the same as inflateReset, but it also permits changing + the wrap and window size requests. The windowBits parameter is interpreted + the same as it is for inflateInit2. If the window size is changed, then the + memory allocated for the window is freed, and the window will be reallocated + by inflate() if needed. + + inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL), or if + the windowBits parameter is invalid. +*/ + +ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + This function inserts bits in the inflate input stream. The intent is + that this function is used to start inflating at a bit position in the + middle of a byte. The provided bits will be used before any bytes are used + from next_in. This function should only be used with raw inflate, and + should be used before the first inflate() call after inflateInit2() or + inflateReset(). bits must be less than or equal to 16, and that many of the + least significant bits of value will be inserted in the input. + + If bits is negative, then the input stream bit buffer is emptied. Then + inflatePrime() can be called again to put bits in the buffer. This is used + to clear out bits leftover after feeding inflate a block description prior + to feeding inflate codes. + + inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm)); +/* + This function returns two values, one in the lower 16 bits of the return + value, and the other in the remaining upper bits, obtained by shifting the + return value down 16 bits. If the upper value is -1 and the lower value is + zero, then inflate() is currently decoding information outside of a block. + If the upper value is -1 and the lower value is non-zero, then inflate is in + the middle of a stored block, with the lower value equaling the number of + bytes from the input remaining to copy. If the upper value is not -1, then + it is the number of bits back from the current bit position in the input of + the code (literal or length/distance pair) currently being processed. In + that case the lower value is the number of bytes already emitted for that + code. + + A code is being processed if inflate is waiting for more input to complete + decoding of the code, or if it has completed decoding but is waiting for + more output space to write the literal or match data. + + inflateMark() is used to mark locations in the input data for random + access, which may be at bit positions, and to note those cases where the + output of a code may span boundaries of random access blocks. The current + location in the input stream can be determined from avail_in and data_type + as noted in the description for the Z_BLOCK flush parameter for inflate. + + inflateMark returns the value noted above, or -65536 if the provided + source stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm, + gz_headerp head)); +/* + inflateGetHeader() requests that gzip header information be stored in the + provided gz_header structure. inflateGetHeader() may be called after + inflateInit2() or inflateReset(), and before the first call of inflate(). + As inflate() processes the gzip stream, head->done is zero until the header + is completed, at which time head->done is set to one. If a zlib stream is + being decoded, then head->done is set to -1 to indicate that there will be + no gzip header information forthcoming. Note that Z_BLOCK or Z_TREES can be + used to force inflate() to return immediately after header processing is + complete and before any actual data is decompressed. + + The text, time, xflags, and os fields are filled in with the gzip header + contents. hcrc is set to true if there is a header CRC. (The header CRC + was valid if done is set to one.) If extra is not Z_NULL, then extra_max + contains the maximum number of bytes to write to extra. Once done is true, + extra_len contains the actual extra field length, and extra contains the + extra field, or that field truncated if extra_max is less than extra_len. + If name is not Z_NULL, then up to name_max characters are written there, + terminated with a zero unless the length is greater than name_max. If + comment is not Z_NULL, then up to comm_max characters are written there, + terminated with a zero unless the length is greater than comm_max. When any + of extra, name, or comment are not Z_NULL and the respective field is not + present in the header, then that field is set to Z_NULL to signal its + absence. This allows the use of deflateSetHeader() with the returned + structure to duplicate the header. However if those fields are set to + allocated memory, then the application will need to save those pointers + elsewhere so that they can be eventually freed. + + If inflateGetHeader is not used, then the header information is simply + discarded. The header is always checked for validity, including the header + CRC if present. inflateReset() will reset the process to discard the header + information. The application would need to call inflateGetHeader() again to + retrieve the header from the next gzip stream. + + inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits, + unsigned char FAR *window)); + + Initialize the internal stream state for decompression using inflateBack() + calls. The fields zalloc, zfree and opaque in strm must be initialized + before the call. If zalloc and zfree are Z_NULL, then the default library- + derived memory allocation routines are used. windowBits is the base two + logarithm of the window size, in the range 8..15. window is a caller + supplied buffer of that size. Except for special applications where it is + assured that deflate was used with small window sizes, windowBits must be 15 + and a 32K byte window must be supplied to be able to decompress general + deflate streams. + + See inflateBack() for the usage of these routines. + + inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of + the parameters are invalid, Z_MEM_ERROR if the internal state could not be + allocated, or Z_VERSION_ERROR if the version of the library does not match + the version of the header file. +*/ + +typedef unsigned (*in_func) OF((void FAR *, + z_const unsigned char FAR * FAR *)); +typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned)); + +ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, + in_func in, void FAR *in_desc, + out_func out, void FAR *out_desc)); +/* + inflateBack() does a raw inflate with a single call using a call-back + interface for input and output. This is potentially more efficient than + inflate() for file i/o applications, in that it avoids copying between the + output and the sliding window by simply making the window itself the output + buffer. inflate() can be faster on modern CPUs when used with large + buffers. inflateBack() trusts the application to not change the output + buffer passed by the output function, at least until inflateBack() returns. + + inflateBackInit() must be called first to allocate the internal state + and to initialize the state with the user-provided window buffer. + inflateBack() may then be used multiple times to inflate a complete, raw + deflate stream with each call. inflateBackEnd() is then called to free the + allocated state. + + A raw deflate stream is one with no zlib or gzip header or trailer. + This routine would normally be used in a utility that reads zip or gzip + files and writes out uncompressed files. The utility would decode the + header and process the trailer on its own, hence this routine expects only + the raw deflate stream to decompress. This is different from the default + behavior of inflate(), which expects a zlib header and trailer around the + deflate stream. + + inflateBack() uses two subroutines supplied by the caller that are then + called by inflateBack() for input and output. inflateBack() calls those + routines until it reads a complete deflate stream and writes out all of the + uncompressed data, or until it encounters an error. The function's + parameters and return types are defined above in the in_func and out_func + typedefs. inflateBack() will call in(in_desc, &buf) which should return the + number of bytes of provided input, and a pointer to that input in buf. If + there is no input available, in() must return zero -- buf is ignored in that + case -- and inflateBack() will return a buffer error. inflateBack() will + call out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. + out() should return zero on success, or non-zero on failure. If out() + returns non-zero, inflateBack() will return with an error. Neither in() nor + out() are permitted to change the contents of the window provided to + inflateBackInit(), which is also the buffer that out() uses to write from. + The length written by out() will be at most the window size. Any non-zero + amount of input may be provided by in(). + + For convenience, inflateBack() can be provided input on the first call by + setting strm->next_in and strm->avail_in. If that input is exhausted, then + in() will be called. Therefore strm->next_in must be initialized before + calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called + immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in + must also be initialized, and then if strm->avail_in is not zero, input will + initially be taken from strm->next_in[0 .. strm->avail_in - 1]. + + The in_desc and out_desc parameters of inflateBack() is passed as the + first parameter of in() and out() respectively when they are called. These + descriptors can be optionally used to pass any information that the caller- + supplied in() and out() functions need to do their job. + + On return, inflateBack() will set strm->next_in and strm->avail_in to + pass back any unused input that was provided by the last in() call. The + return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR + if in() or out() returned an error, Z_DATA_ERROR if there was a format error + in the deflate stream (in which case strm->msg is set to indicate the nature + of the error), or Z_STREAM_ERROR if the stream was not properly initialized. + In the case of Z_BUF_ERROR, an input or output error can be distinguished + using strm->next_in which will be Z_NULL only if in() returned an error. If + strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning + non-zero. (in() will always be called before out(), so strm->next_in is + assured to be defined if out() returns non-zero.) Note that inflateBack() + cannot return Z_OK. +*/ + +ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm)); +/* + All memory allocated by inflateBackInit() is freed. + + inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream + state was inconsistent. +*/ + +ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void)); +/* Return flags indicating compile-time options. + + Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other: + 1.0: size of uInt + 3.2: size of uLong + 5.4: size of voidpf (pointer) + 7.6: size of z_off_t + + Compiler, assembler, and debug options: + 8: ZLIB_DEBUG + 9: ASMV or ASMINF -- use ASM code + 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention + 11: 0 (reserved) + + One-time table building (smaller code, but not thread-safe if true): + 12: BUILDFIXED -- build static block decoding tables when needed + 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed + 14,15: 0 (reserved) + + Library content (indicates missing functionality): + 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking + deflate code when not needed) + 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect + and decode gzip streams (to avoid linking crc code) + 18-19: 0 (reserved) + + Operation variations (changes in library functionality): + 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate + 21: FASTEST -- deflate algorithm with only one, lowest compression level + 22,23: 0 (reserved) + + The sprintf variant used by gzprintf (zero is best): + 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format + 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure! + 26: 0 = returns value, 1 = void -- 1 means inferred string length returned + + Remainder: + 27-31: 0 (reserved) + */ + +#ifndef Z_SOLO + + /* utility functions */ + +/* + The following utility functions are implemented on top of the basic + stream-oriented functions. To simplify the interface, some default options + are assumed (compression level and memory usage, standard memory allocation + functions). The source code of these utility functions can be modified if + you need special options. +*/ + +ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Compresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed data. compress() is equivalent to compress2() with a level + parameter of Z_DEFAULT_COMPRESSION. + + compress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer. +*/ + +ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen, + int level)); +/* + Compresses the source buffer into the destination buffer. The level + parameter has the same meaning as in deflateInit. sourceLen is the byte + length of the source buffer. Upon entry, destLen is the total size of the + destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed data. + + compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_BUF_ERROR if there was not enough room in the output buffer, + Z_STREAM_ERROR if the level parameter is invalid. +*/ + +ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen)); +/* + compressBound() returns an upper bound on the compressed size after + compress() or compress2() on sourceLen bytes. It would be used before a + compress() or compress2() call to allocate the destination buffer. +*/ + +ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Decompresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be large enough to hold the entire + uncompressed data. (The size of the uncompressed data must have been saved + previously by the compressor and transmitted to the decompressor by some + mechanism outside the scope of this compression library.) Upon exit, destLen + is the actual size of the uncompressed data. + + uncompress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. In + the case where there is not enough room, uncompress() will fill the output + buffer with the uncompressed data up to that point. +*/ + +ZEXTERN int ZEXPORT uncompress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong *sourceLen)); +/* + Same as uncompress, except that sourceLen is a pointer, where the + length of the source is *sourceLen. On return, *sourceLen is the number of + source bytes consumed. +*/ + + /* gzip file access functions */ + +/* + This library supports reading and writing files in gzip (.gz) format with + an interface similar to that of stdio, using the functions that start with + "gz". The gzip format is different from the zlib format. gzip is a gzip + wrapper, documented in RFC 1952, wrapped around a deflate stream. +*/ + +typedef struct gzFile_s *gzFile; /* semi-opaque gzip file descriptor */ + +/* +ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); + + Opens a gzip (.gz) file for reading or writing. The mode parameter is as + in fopen ("rb" or "wb") but can also include a compression level ("wb9") or + a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only + compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F' + for fixed code compression as in "wb9F". (See the description of + deflateInit2 for more information about the strategy parameter.) 'T' will + request transparent writing or appending with no compression and not using + the gzip format. + + "a" can be used instead of "w" to request that the gzip stream that will + be written be appended to the file. "+" will result in an error, since + reading and writing to the same gzip file is not supported. The addition of + "x" when writing will create the file exclusively, which fails if the file + already exists. On systems that support it, the addition of "e" when + reading or writing will set the flag to close the file on an execve() call. + + These functions, as well as gzip, will read and decode a sequence of gzip + streams in a file. The append function of gzopen() can be used to create + such a file. (Also see gzflush() for another way to do this.) When + appending, gzopen does not test whether the file begins with a gzip stream, + nor does it look for the end of the gzip streams to begin appending. gzopen + will simply append a gzip stream to the existing file. + + gzopen can be used to read a file which is not in gzip format; in this + case gzread will directly read from the file without decompression. When + reading, this will be detected automatically by looking for the magic two- + byte gzip header. + + gzopen returns NULL if the file could not be opened, if there was + insufficient memory to allocate the gzFile state, or if an invalid mode was + specified (an 'r', 'w', or 'a' was not provided, or '+' was provided). + errno can be checked to determine if the reason gzopen failed was that the + file could not be opened. +*/ + +ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode)); +/* + gzdopen associates a gzFile with the file descriptor fd. File descriptors + are obtained from calls like open, dup, creat, pipe or fileno (if the file + has been previously opened with fopen). The mode parameter is as in gzopen. + + The next call of gzclose on the returned gzFile will also close the file + descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor + fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, + mode);. The duplicated descriptor should be saved to avoid a leak, since + gzdopen does not close fd if it fails. If you are using fileno() to get the + file descriptor from a FILE *, then you will have to use dup() to avoid + double-close()ing the file descriptor. Both gzclose() and fclose() will + close the associated file descriptor, so they need to have different file + descriptors. + + gzdopen returns NULL if there was insufficient memory to allocate the + gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not + provided, or '+' was provided), or if fd is -1. The file descriptor is not + used until the next gz* read, write, seek, or close operation, so gzdopen + will not detect if fd is invalid (unless fd is -1). +*/ + +ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size)); +/* + Set the internal buffer size used by this library's functions. The + default buffer size is 8192 bytes. This function must be called after + gzopen() or gzdopen(), and before any other calls that read or write the + file. The buffer memory allocation is always deferred to the first read or + write. Three times that size in buffer space is allocated. A larger buffer + size of, for example, 64K or 128K bytes will noticeably increase the speed + of decompression (reading). + + The new buffer size also affects the maximum length for gzprintf(). + + gzbuffer() returns 0 on success, or -1 on failure, such as being called + too late. +*/ + +ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); +/* + Dynamically update the compression level or strategy. See the description + of deflateInit2 for the meaning of these parameters. Previously provided + data is flushed before the parameter change. + + gzsetparams returns Z_OK if success, Z_STREAM_ERROR if the file was not + opened for writing, Z_ERRNO if there is an error writing the flushed data, + or Z_MEM_ERROR if there is a memory allocation error. +*/ + +ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); +/* + Reads the given number of uncompressed bytes from the compressed file. If + the input file is not in gzip format, gzread copies the given number of + bytes into the buffer directly from the file. + + After reaching the end of a gzip stream in the input, gzread will continue + to read, looking for another gzip stream. Any number of gzip streams may be + concatenated in the input file, and will all be decompressed by gzread(). + If something other than a gzip stream is encountered after a gzip stream, + that remaining trailing garbage is ignored (and no error is returned). + + gzread can be used to read a gzip file that is being concurrently written. + Upon reaching the end of the input, gzread will return with the available + data. If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then + gzclearerr can be used to clear the end of file indicator in order to permit + gzread to be tried again. Z_OK indicates that a gzip stream was completed + on the last gzread. Z_BUF_ERROR indicates that the input file ended in the + middle of a gzip stream. Note that gzread does not return -1 in the event + of an incomplete gzip stream. This error is deferred until gzclose(), which + will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip + stream. Alternatively, gzerror can be used before gzclose to detect this + case. + + gzread returns the number of uncompressed bytes actually read, less than + len for end of file, or -1 for error. If len is too large to fit in an int, + then nothing is read, -1 is returned, and the error state is set to + Z_STREAM_ERROR. +*/ + +ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems, + gzFile file)); +/* + Read up to nitems items of size size from file to buf, otherwise operating + as gzread() does. This duplicates the interface of stdio's fread(), with + size_t request and return types. If the library defines size_t, then + z_size_t is identical to size_t. If not, then z_size_t is an unsigned + integer type that can contain a pointer. + + gzfread() returns the number of full items read of size size, or zero if + the end of the file was reached and a full item could not be read, or if + there was an error. gzerror() must be consulted if zero is returned in + order to determine if there was an error. If the multiplication of size and + nitems overflows, i.e. the product does not fit in a z_size_t, then nothing + is read, zero is returned, and the error state is set to Z_STREAM_ERROR. + + In the event that the end of file is reached and only a partial item is + available at the end, i.e. the remaining uncompressed data length is not a + multiple of size, then the final partial item is nevetheless read into buf + and the end-of-file flag is set. The length of the partial item read is not + provided, but could be inferred from the result of gztell(). This behavior + is the same as the behavior of fread() implementations in common libraries, + but it prevents the direct use of gzfread() to read a concurrently written + file, reseting and retrying on end-of-file, when size is not 1. +*/ + +ZEXTERN int ZEXPORT gzwrite OF((gzFile file, + voidpc buf, unsigned len)); +/* + Writes the given number of uncompressed bytes into the compressed file. + gzwrite returns the number of uncompressed bytes written or 0 in case of + error. +*/ + +ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size, + z_size_t nitems, gzFile file)); +/* + gzfwrite() writes nitems items of size size from buf to file, duplicating + the interface of stdio's fwrite(), with size_t request and return types. If + the library defines size_t, then z_size_t is identical to size_t. If not, + then z_size_t is an unsigned integer type that can contain a pointer. + + gzfwrite() returns the number of full items written of size size, or zero + if there was an error. If the multiplication of size and nitems overflows, + i.e. the product does not fit in a z_size_t, then nothing is written, zero + is returned, and the error state is set to Z_STREAM_ERROR. +*/ + +ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...)); +/* + Converts, formats, and writes the arguments to the compressed file under + control of the format string, as in fprintf. gzprintf returns the number of + uncompressed bytes actually written, or a negative zlib error code in case + of error. The number of uncompressed bytes written is limited to 8191, or + one less than the buffer size given to gzbuffer(). The caller should assure + that this limit is not exceeded. If it is exceeded, then gzprintf() will + return an error (0) with nothing written. In this case, there may also be a + buffer overflow with unpredictable consequences, which is possible only if + zlib was compiled with the insecure functions sprintf() or vsprintf() + because the secure snprintf() or vsnprintf() functions were not available. + This can be determined using zlibCompileFlags(). +*/ + +ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); +/* + Writes the given null-terminated string to the compressed file, excluding + the terminating null character. + + gzputs returns the number of characters written, or -1 in case of error. +*/ + +ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len)); +/* + Reads bytes from the compressed file until len-1 characters are read, or a + newline character is read and transferred to buf, or an end-of-file + condition is encountered. If any characters are read or if len == 1, the + string is terminated with a null character. If no characters are read due + to an end-of-file or len < 1, then the buffer is left untouched. + + gzgets returns buf which is a null-terminated string, or it returns NULL + for end-of-file or in case of error. If there was an error, the contents at + buf are indeterminate. +*/ + +ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c)); +/* + Writes c, converted to an unsigned char, into the compressed file. gzputc + returns the value that was written, or -1 in case of error. +*/ + +ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); +/* + Reads one byte from the compressed file. gzgetc returns this byte or -1 + in case of end of file or error. This is implemented as a macro for speed. + As such, it does not do all of the checking the other functions do. I.e. + it does not check to see if file is NULL, nor whether the structure file + points to has been clobbered or not. +*/ + +ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); +/* + Push one character back onto the stream to be read as the first character + on the next read. At least one character of push-back is allowed. + gzungetc() returns the character pushed, or -1 on failure. gzungetc() will + fail if c is -1, and may fail if a character has been pushed but not read + yet. If gzungetc is used immediately after gzopen or gzdopen, at least the + output buffer size of pushed characters is allowed. (See gzbuffer above.) + The pushed character will be discarded if the stream is repositioned with + gzseek() or gzrewind(). +*/ + +ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); +/* + Flushes all pending output into the compressed file. The parameter flush + is as in the deflate() function. The return value is the zlib error number + (see function gzerror below). gzflush is only permitted when writing. + + If the flush parameter is Z_FINISH, the remaining data is written and the + gzip stream is completed in the output. If gzwrite() is called again, a new + gzip stream will be started in the output. gzread() is able to read such + concatenated gzip streams. + + gzflush should be called only when strictly necessary because it will + degrade compression if called too often. +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, + z_off_t offset, int whence)); + + Sets the starting position for the next gzread or gzwrite on the given + compressed file. The offset represents a number of bytes in the + uncompressed data stream. The whence parameter is defined as in lseek(2); + the value SEEK_END is not supported. + + If the file is opened for reading, this function is emulated but can be + extremely slow. If the file is opened for writing, only forward seeks are + supported; gzseek then compresses a sequence of zeroes up to the new + starting position. + + gzseek returns the resulting offset location as measured in bytes from + the beginning of the uncompressed stream, or -1 in case of error, in + particular if the file is opened for writing and the new starting position + would be before the current position. +*/ + +ZEXTERN int ZEXPORT gzrewind OF((gzFile file)); +/* + Rewinds the given file. This function is supported only for reading. + + gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file)); + + Returns the starting position for the next gzread or gzwrite on the given + compressed file. This position represents a number of bytes in the + uncompressed data stream, and is zero when starting, even if appending or + reading a gzip stream from the middle of a file using gzdopen(). + + gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file)); + + Returns the current offset in the file being read or written. This offset + includes the count of bytes that precede the gzip stream, for example when + appending or when using gzdopen() for reading. When reading, the offset + does not include as yet unused buffered input. This information can be used + for a progress indicator. On error, gzoffset() returns -1. +*/ + +ZEXTERN int ZEXPORT gzeof OF((gzFile file)); +/* + Returns true (1) if the end-of-file indicator has been set while reading, + false (0) otherwise. Note that the end-of-file indicator is set only if the + read tried to go past the end of the input, but came up short. Therefore, + just like feof(), gzeof() may return false even if there is no more data to + read, in the event that the last read request was for the exact number of + bytes remaining in the input file. This will happen if the input file size + is an exact multiple of the buffer size. + + If gzeof() returns true, then the read functions will return no more data, + unless the end-of-file indicator is reset by gzclearerr() and the input file + has grown since the previous end of file was detected. +*/ + +ZEXTERN int ZEXPORT gzdirect OF((gzFile file)); +/* + Returns true (1) if file is being copied directly while reading, or false + (0) if file is a gzip stream being decompressed. + + If the input file is empty, gzdirect() will return true, since the input + does not contain a gzip stream. + + If gzdirect() is used immediately after gzopen() or gzdopen() it will + cause buffers to be allocated to allow reading the file to determine if it + is a gzip file. Therefore if gzbuffer() is used, it should be called before + gzdirect(). + + When writing, gzdirect() returns true (1) if transparent writing was + requested ("wT" for the gzopen() mode), or false (0) otherwise. (Note: + gzdirect() is not needed when writing. Transparent writing must be + explicitly requested, so the application already knows the answer. When + linking statically, using gzdirect() will include all of the zlib code for + gzip file reading and decompression, which may not be desired.) +*/ + +ZEXTERN int ZEXPORT gzclose OF((gzFile file)); +/* + Flushes all pending output if necessary, closes the compressed file and + deallocates the (de)compression state. Note that once file is closed, you + cannot call gzerror with file, since its structures have been deallocated. + gzclose must not be called more than once on the same file, just as free + must not be called more than once on the same allocation. + + gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a + file operation error, Z_MEM_ERROR if out of memory, Z_BUF_ERROR if the + last read ended in the middle of a gzip stream, or Z_OK on success. +*/ + +ZEXTERN int ZEXPORT gzclose_r OF((gzFile file)); +ZEXTERN int ZEXPORT gzclose_w OF((gzFile file)); +/* + Same as gzclose(), but gzclose_r() is only for use when reading, and + gzclose_w() is only for use when writing or appending. The advantage to + using these instead of gzclose() is that they avoid linking in zlib + compression or decompression code that is not used when only reading or only + writing respectively. If gzclose() is used, then both compression and + decompression code will be included the application when linking to a static + zlib library. +*/ + +ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum)); +/* + Returns the error message for the last error which occurred on the given + compressed file. errnum is set to zlib error number. If an error occurred + in the file system and not in the compression library, errnum is set to + Z_ERRNO and the application may consult errno to get the exact error code. + + The application must not modify the returned string. Future calls to + this function may invalidate the previously returned string. If file is + closed, then the string previously returned by gzerror will no longer be + available. + + gzerror() should be used to distinguish errors from end-of-file for those + functions above that do not distinguish those cases in their return values. +*/ + +ZEXTERN void ZEXPORT gzclearerr OF((gzFile file)); +/* + Clears the error and end-of-file flags for file. This is analogous to the + clearerr() function in stdio. This is useful for continuing to read a gzip + file that is being written concurrently. +*/ + +#endif /* !Z_SOLO */ + + /* checksum functions */ + +/* + These functions are not related to compression but are exported + anyway because they might be useful in applications using the compression + library. +*/ + +ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); +/* + Update a running Adler-32 checksum with the bytes buf[0..len-1] and + return the updated checksum. If buf is Z_NULL, this function returns the + required initial value for the checksum. + + An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed + much faster. + + Usage example: + + uLong adler = adler32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + adler = adler32(adler, buffer, length); + } + if (adler != original_adler) error(); +*/ + +ZEXTERN uLong ZEXPORT adler32_z OF((uLong adler, const Bytef *buf, + z_size_t len)); +/* + Same as adler32(), but with a size_t length. +*/ + +/* +ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, + z_off_t len2)); + + Combine two Adler-32 checksums into one. For two sequences of bytes, seq1 + and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for + each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of + seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. Note + that the z_off_t type (like off_t) is a signed integer. If len2 is + negative, the result has no meaning or utility. +*/ + +ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); +/* + Update a running CRC-32 with the bytes buf[0..len-1] and return the + updated CRC-32. If buf is Z_NULL, this function returns the required + initial value for the crc. Pre- and post-conditioning (one's complement) is + performed within this function so it shouldn't be done by the application. + + Usage example: + + uLong crc = crc32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + crc = crc32(crc, buffer, length); + } + if (crc != original_crc) error(); +*/ + +ZEXTERN uLong ZEXPORT crc32_z OF((uLong adler, const Bytef *buf, + z_size_t len)); +/* + Same as crc32(), but with a size_t length. +*/ + +/* +ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); + + Combine two CRC-32 check values into one. For two sequences of bytes, + seq1 and seq2 with lengths len1 and len2, CRC-32 check values were + calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32 + check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and + len2. +*/ + + + /* various hacks, don't look :) */ + +/* deflateInit and inflateInit are macros to allow checking the zlib version + * and the compiler's view of z_stream: + */ +ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method, + int windowBits, int memLevel, + int strategy, const char *version, + int stream_size)); +ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits, + unsigned char FAR *window, + const char *version, + int stream_size)); +#ifdef Z_PREFIX_SET +# define z_deflateInit(strm, level) \ + deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_inflateInit(strm) \ + inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ + deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ + (strategy), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_inflateInit2(strm, windowBits) \ + inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ + (int)sizeof(z_stream)) +# define z_inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, (int)sizeof(z_stream)) +#else +# define deflateInit(strm, level) \ + deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) +# define inflateInit(strm) \ + inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) +# define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ + deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ + (strategy), ZLIB_VERSION, (int)sizeof(z_stream)) +# define inflateInit2(strm, windowBits) \ + inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ + (int)sizeof(z_stream)) +# define inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, (int)sizeof(z_stream)) +#endif + +#ifndef Z_SOLO + +/* gzgetc() macro and its supporting function and exposed data structure. Note + * that the real internal state is much larger than the exposed structure. + * This abbreviated structure exposes just enough for the gzgetc() macro. The + * user should not mess with these exposed elements, since their names or + * behavior could change in the future, perhaps even capriciously. They can + * only be used by the gzgetc() macro. You have been warned. + */ +struct gzFile_s { + unsigned have; + unsigned char *next; + z_off64_t pos; +}; +ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */ +#ifdef Z_PREFIX_SET +# undef z_gzgetc +# define z_gzgetc(g) \ + ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g)) +#else +# define gzgetc(g) \ + ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g)) +#endif + +/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or + * change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if + * both are true, the application gets the *64 functions, and the regular + * functions are changed to 64 bits) -- in case these are set on systems + * without large file support, _LFS64_LARGEFILE must also be true + */ +#ifdef Z_LARGE64 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); + ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t)); +#endif + +#if !defined(ZLIB_INTERNAL) && defined(Z_WANT64) +# ifdef Z_PREFIX_SET +# define z_gzopen z_gzopen64 +# define z_gzseek z_gzseek64 +# define z_gztell z_gztell64 +# define z_gzoffset z_gzoffset64 +# define z_adler32_combine z_adler32_combine64 +# define z_crc32_combine z_crc32_combine64 +# else +# define gzopen gzopen64 +# define gzseek gzseek64 +# define gztell gztell64 +# define gzoffset gzoffset64 +# define adler32_combine adler32_combine64 +# define crc32_combine crc32_combine64 +# endif +# ifndef Z_LARGE64 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); +# endif +#else + ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); +#endif + +#else /* Z_SOLO */ + + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); + +#endif /* !Z_SOLO */ + +/* undocumented functions */ +ZEXTERN const char * ZEXPORT zError OF((int)); +ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); +ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void)); +ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); +ZEXTERN int ZEXPORT inflateValidate OF((z_streamp, int)); +ZEXTERN unsigned long ZEXPORT inflateCodesUsed OF ((z_streamp)); +ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp)); +ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp)); +#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO) +ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path, + const char *mode)); +#endif +#if defined(STDC) || defined(Z_HAVE_STDARG_H) +# ifndef Z_SOLO +ZEXTERN int ZEXPORTVA gzvprintf Z_ARG((gzFile file, + const char *format, + va_list va)); +# endif +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* ZLIB_H */ diff --git a/client/qt_gl_/yuvgl/main.cpp b/client/qt_gl_/yuvgl/main.cpp index d00a430..7dca234 100644 --- a/client/qt_gl_/yuvgl/main.cpp +++ b/client/qt_gl_/yuvgl/main.cpp @@ -7,25 +7,27 @@ #include #include #include +#include "media/screen_capture.h" #ifdef __MINGW32__ #include #include "winuser.h" #endif - - int RegiesterOwnType(){ return 0; } + int main(int argc, char *argv[]) { + ScreenCapture g; + g.EnumScreen(); QssEventFilter filter; QApplication app(argc, argv); MainWindow main; - main.setWindowTitle("视频采集rtmp推æµå·¥å…·"); + main.setWindowTitle("Á÷ýÌå²âÊÔ¹¤¾ß"); main.setFixedSize(1920,1080); main.show(); return app.exec(); diff --git a/client/qt_gl_/yuvgl/mainwindow.ui b/client/qt_gl_/yuvgl/mainwindow.ui index 2b192d4..45d9f32 100644 --- a/client/qt_gl_/yuvgl/mainwindow.ui +++ b/client/qt_gl_/yuvgl/mainwindow.ui @@ -70,7 +70,7 @@ - 打开摄åƒå¤´ + ??????? @@ -99,7 +99,7 @@ - 打开麦克风 + ?????? @@ -116,7 +116,7 @@ - rtmp推æµåœ°å€ + rtmp??????? @@ -142,7 +142,7 @@ - æŽ¨æµ + ???? diff --git a/client/qt_gl_/yuvgl/media/AACAudioCoder.cpp b/client/qt_gl_/yuvgl/media/AACAudioCoder.cpp index fddfe7d..3fed772 100644 --- a/client/qt_gl_/yuvgl/media/AACAudioCoder.cpp +++ b/client/qt_gl_/yuvgl/media/AACAudioCoder.cpp @@ -15,7 +15,7 @@ void AACAudioCoder::OnAudioData(const void *frameaddress, uint32_t framelen) AACAudioCoder::AACAudioCoder(unsigned int smprate, unsigned int channel) { AVCodecID codec_id = AV_CODEC_ID_AAC; - pCodec = avcodec_find_encoder_by_name("libfdk_aac"); + pCodec = (AVCodec *)avcodec_find_encoder_by_name("libfdk_aac"); if (!pCodec) { printf("Codec not found\n"); this->mStatus = FAIL; diff --git a/client/qt_gl_/yuvgl/media/DXGICapture.cpp b/client/qt_gl_/yuvgl/media/DXGICapture.cpp new file mode 100644 index 0000000..bce0f99 --- /dev/null +++ b/client/qt_gl_/yuvgl/media/DXGICapture.cpp @@ -0,0 +1,683 @@ +/***************************************************************************** +* DXGICapture.cpp +* +* Copyright (C) 2020 Gokhan Erdogdu +* +* DXGICapture is free software; you can redistribute it and/or modify it under +* the terms of the GNU Lesser General Public License as published by the Free +* Software Foundation; either version 2.1 of the License, or (at your option) +* any later version. +* +* DXGICapture is distributed in the hope that it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more +* details. +* +******************************************************************************/ +#include "DXGICapture.h" +#include "DXGICaptureHelper.h" + +#include + +#pragma comment(lib, "D3D11.lib") +#pragma comment(lib, "d2d1.lib") +#pragma comment(lib, "windowscodecs.lib") + +#pragma comment(lib, "shcore.lib") // SetProcessDpiAwareness + +// Driver types supported +const D3D_DRIVER_TYPE g_DriverTypes[] = +{ + D3D_DRIVER_TYPE_HARDWARE, + D3D_DRIVER_TYPE_WARP, + D3D_DRIVER_TYPE_REFERENCE, +}; +const UINT g_NumDriverTypes = ARRAYSIZE(g_DriverTypes); + +// Feature levels supported +const D3D_FEATURE_LEVEL g_FeatureLevels[] = +{ + D3D_FEATURE_LEVEL_11_0, + D3D_FEATURE_LEVEL_10_1, + D3D_FEATURE_LEVEL_10_0, + D3D_FEATURE_LEVEL_9_1 +}; +const UINT g_NumFeatureLevels = ARRAYSIZE(g_FeatureLevels); + +#define AUTOLOCK() ATL::CComCritSecLock auto_lock((ATL::CComAutoCriticalSection&)(m_csLock)) + +// +// class CDXGICapture +// +CDXGICapture::CDXGICapture() + : m_csLock() + , m_bInitialized(FALSE) + , m_lD3DFeatureLevel(D3D_FEATURE_LEVEL_INVALID) +{ + RtlZeroMemory(&m_rendererInfo, sizeof(m_rendererInfo)); + RtlZeroMemory(&m_mouseInfo, sizeof(m_mouseInfo)); + RtlZeroMemory(&m_tempMouseBuffer, sizeof(m_tempMouseBuffer)); + RtlZeroMemory(&m_desktopOutputDesc, sizeof(m_desktopOutputDesc)); +} + +CDXGICapture::~CDXGICapture() +{ + this->Terminate(); +} + +HRESULT CDXGICapture::loadMonitorInfos(ID3D11Device *pDevice) +{ + CHECK_POINTER(pDevice); + + HRESULT hr = S_OK; + CComPtr ipDevice(pDevice); + + // Get DXGI device + CComPtr ipDxgiDevice; + hr = ipDevice->QueryInterface(IID_PPV_ARGS(&ipDxgiDevice)); + if (FAILED(hr)) { + return hr; + } + + // Get DXGI adapter + CComPtr ipDxgiAdapter; + hr = ipDxgiDevice->GetParent(IID_PPV_ARGS(&ipDxgiAdapter)); + if (FAILED(hr)) { + return hr; + } + ipDxgiDevice = nullptr; + + CComPtr ipDxgiOutput; + for (UINT i = 0; SUCCEEDED(hr); ++i) + { + ipDxgiOutput = nullptr; + hr = ipDxgiAdapter->EnumOutputs(i, &ipDxgiOutput); + if ((nullptr != ipDxgiOutput) && (hr != DXGI_ERROR_NOT_FOUND)) + { + DXGI_OUTPUT_DESC DesktopDesc; + hr = ipDxgiOutput->GetDesc(&DesktopDesc); + if (FAILED(hr)) { + continue; + } + + tagDublicatorMonitorInfo *pInfo; + pInfo = new (std::nothrow) tagDublicatorMonitorInfo; + if (nullptr == pInfo) { + return E_OUTOFMEMORY; + } + + hr = DXGICaptureHelper::ConvertDxgiOutputToMonitorInfo(&DesktopDesc, i, pInfo); + if (FAILED(hr)) { + delete pInfo; + continue; + } + + m_monitorInfos.push_back(pInfo); + } + } + + ipDxgiOutput = nullptr; + ipDxgiAdapter = nullptr; + + return S_OK; +} + +void CDXGICapture::freeMonitorInfos() +{ + size_t nCount = m_monitorInfos.size(); + if (nCount == 0) { + return; + } + DublicatorMonitorInfoVec::iterator it = m_monitorInfos.begin(); + DublicatorMonitorInfoVec::iterator end = m_monitorInfos.end(); + for (size_t i = 0; (i < nCount) && (it != end); i++, it++) { + tagDublicatorMonitorInfo *pInfo = *it; + if (nullptr != pInfo) { + delete pInfo; + } + } + m_monitorInfos.clear(); +} + +HRESULT CDXGICapture::createDeviceResource( + const tagScreenCaptureFilterConfig *pConfig, + const tagDublicatorMonitorInfo *pSelectedMonitorInfo + ) +{ + HRESULT hr = S_OK; + + CComPtr ipDxgiOutputDuplication; + CComPtr ipCopyTexture2D; + CComPtr ipD2D1Device; + CComPtr ipD2D1DeviceContext; + CComPtr ipD2D1Factory; + CComPtr ipWICImageFactory; + CComPtr ipWICOutputBitmap; + CComPtr ipD2D1RenderTarget; + DXGI_OUTPUT_DESC dgixOutputDesc; + tagRendererInfo rendererInfo; + + RtlZeroMemory(&dgixOutputDesc, sizeof(dgixOutputDesc)); + RtlZeroMemory(&rendererInfo, sizeof(rendererInfo)); + + // copy configuration to renderer info + rendererInfo.MonitorIdx = pConfig->MonitorIdx; + rendererInfo.ShowCursor = pConfig->ShowCursor; + rendererInfo.RotationMode = pConfig->RotationMode; + rendererInfo.SizeMode = pConfig->SizeMode; + rendererInfo.OutputSize = pConfig->OutputSize; + // default + rendererInfo.ScaleX = 1.0f; + rendererInfo.ScaleY = 1.0f; + + do + { + // Get DXGI factory + CComPtr ipDxgiDevice; + hr = m_ipD3D11Device->QueryInterface(IID_PPV_ARGS(&ipDxgiDevice)); + CHECK_HR_BREAK(hr); + + CComPtr ipDxgiAdapter; + hr = ipDxgiDevice->GetParent(IID_PPV_ARGS(&ipDxgiAdapter)); + CHECK_HR_BREAK(hr); + + // Get output + CComPtr ipDxgiOutput; + hr = ipDxgiAdapter->EnumOutputs(rendererInfo.MonitorIdx, &ipDxgiOutput); + CHECK_HR_BREAK(hr); + + // Get output description + hr = ipDxgiOutput->GetDesc(&dgixOutputDesc); + CHECK_HR_BREAK(hr); + + tagDublicatorMonitorInfo curMonInfo; + hr = DXGICaptureHelper::ConvertDxgiOutputToMonitorInfo(&dgixOutputDesc, rendererInfo.MonitorIdx, &curMonInfo); + CHECK_HR_BREAK(hr); + + if (!DXGICaptureHelper::IsEqualMonitorInfo(pSelectedMonitorInfo, &curMonInfo)) { + hr = E_INVALIDARG; // Monitor settings have changed ??? + break; + } + + // QI for Output 1 + CComPtr ipDxgiOutput1; + hr = ipDxgiOutput->QueryInterface(IID_PPV_ARGS(&ipDxgiOutput1)); + CHECK_HR_BREAK(hr); + + // Create desktop duplication + hr = ipDxgiOutput1->DuplicateOutput(m_ipD3D11Device, &ipDxgiOutputDuplication); + CHECK_HR_BREAK(hr); + + DXGI_OUTDUPL_DESC dxgiOutputDuplDesc; + ipDxgiOutputDuplication->GetDesc(&dxgiOutputDuplDesc); + + hr = DXGICaptureHelper::CalculateRendererInfo(&dxgiOutputDuplDesc, &rendererInfo); + CHECK_HR_BREAK(hr); + + // Create CPU access texture + D3D11_TEXTURE2D_DESC desc; + desc.Width = rendererInfo.SrcBounds.Width; + desc.Height = rendererInfo.SrcBounds.Height; + desc.Format = rendererInfo.SrcFormat; + desc.ArraySize = 1; + desc.BindFlags = 0; + desc.MiscFlags = 0; + desc.SampleDesc.Count = 1; + desc.SampleDesc.Quality = 0; + desc.MipLevels = 1; + desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ | D3D11_CPU_ACCESS_WRITE; + desc.Usage = D3D11_USAGE_STAGING; + + hr = m_ipD3D11Device->CreateTexture2D(&desc, NULL, &ipCopyTexture2D); + CHECK_HR_BREAK(hr); + + if (nullptr == ipCopyTexture2D) + { + hr = E_OUTOFMEMORY; + break; + } + +#pragma region + + // Create D2D1 device + UINT uiFlags = m_ipD3D11Device->GetCreationFlags(); + D2D1_CREATION_PROPERTIES d2d1Props = D2D1::CreationProperties + ( + (uiFlags & D3D11_CREATE_DEVICE_SINGLETHREADED) + ? D2D1_THREADING_MODE_SINGLE_THREADED + : D2D1_THREADING_MODE_MULTI_THREADED, + D2D1_DEBUG_LEVEL_NONE, + (uiFlags & D3D11_CREATE_DEVICE_SINGLETHREADED) + ? D2D1_DEVICE_CONTEXT_OPTIONS_NONE + : D2D1_DEVICE_CONTEXT_OPTIONS_ENABLE_MULTITHREADED_OPTIMIZATIONS + ); + hr = D2D1CreateDevice(ipDxgiDevice, d2d1Props, &ipD2D1Device); + CHECK_HR_BREAK(hr); + + // Get D2D1 factory + ipD2D1Device->GetFactory(&ipD2D1Factory); + + if (nullptr == ipD2D1Factory) + { + hr = D2DERR_INVALID_CALL; + break; + } + + //create WIC factory + hr = CoCreateInstance( + CLSID_WICImagingFactory, + NULL, + CLSCTX_INPROC_SERVER, + IID_IWICImagingFactory, + reinterpret_cast(&ipWICImageFactory) + ); + CHECK_HR_BREAK(hr); + + // create D2D1 target bitmap for render + hr = ipWICImageFactory->CreateBitmap( + (UINT)rendererInfo.OutputSize.Width, + (UINT)rendererInfo.OutputSize.Height, + GUID_WICPixelFormat32bppPBGRA, + WICBitmapCacheOnDemand, + &ipWICOutputBitmap); + CHECK_HR_BREAK(hr); + + if (nullptr == ipWICOutputBitmap) + { + hr = E_OUTOFMEMORY; + break; + } + + // create a D2D1 render target (for D2D1 drawing) + D2D1_RENDER_TARGET_PROPERTIES d2d1RenderTargetProp = D2D1::RenderTargetProperties + ( + D2D1_RENDER_TARGET_TYPE_DEFAULT, + D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_PREMULTIPLIED), + 0.0f, // default dpi + 0.0f, // default dpi + D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE + ); + hr = ipD2D1Factory->CreateWicBitmapRenderTarget( + ipWICOutputBitmap, + d2d1RenderTargetProp, + &ipD2D1RenderTarget + ); + CHECK_HR_BREAK(hr); + +#pragma endregion + + } while (false); + + if (SUCCEEDED(hr)) + { + // copy output parameters + memcpy_s((void*)&m_rendererInfo, sizeof(m_rendererInfo), (const void*)&rendererInfo, sizeof(m_rendererInfo)); + + // set parameters + m_desktopOutputDesc = dgixOutputDesc; + + m_ipDxgiOutputDuplication = ipDxgiOutputDuplication; + m_ipCopyTexture2D = ipCopyTexture2D; + + m_ipD2D1Device = ipD2D1Device; + m_ipD2D1Factory = ipD2D1Factory; + m_ipWICImageFactory = ipWICImageFactory; + m_ipWICOutputBitmap = ipWICOutputBitmap; + m_ipD2D1RenderTarget = ipD2D1RenderTarget; + } + + return S_OK; +} + +void CDXGICapture::terminateDeviceResource() +{ + m_ipDxgiOutputDuplication = nullptr; + m_ipCopyTexture2D = nullptr; + + m_ipD2D1Device = nullptr; + m_ipD2D1Factory = nullptr; + m_ipWICImageFactory = nullptr; + m_ipWICOutputBitmap = nullptr; + m_ipD2D1RenderTarget = nullptr; + + // clear config parameters + RtlZeroMemory(&m_rendererInfo, sizeof(m_rendererInfo)); + + // clear mouse information parameters + if (m_mouseInfo.PtrShapeBuffer != nullptr) { + delete[] m_mouseInfo.PtrShapeBuffer; + m_mouseInfo.PtrShapeBuffer = nullptr; + } + RtlZeroMemory(&m_mouseInfo, sizeof(m_mouseInfo)); + + // clear temp temp buffer + if (m_tempMouseBuffer.Buffer != nullptr) { + delete[] m_tempMouseBuffer.Buffer; + m_tempMouseBuffer.Buffer = nullptr; + } + RtlZeroMemory(&m_tempMouseBuffer, sizeof(m_tempMouseBuffer)); + + // clear desktop output desc + RtlZeroMemory(&m_desktopOutputDesc, sizeof(m_desktopOutputDesc)); +} + +HRESULT CDXGICapture::Initialize() +{ + AUTOLOCK(); + if (m_bInitialized) { + return HRESULT_FROM_WIN32(ERROR_ALREADY_INITIALIZED); // already initialized + } + + HRESULT hr = S_OK; + D3D_FEATURE_LEVEL lFeatureLevel; + CComPtr ipDevice; + CComPtr ipDeviceContext; + + // required for monitor dpi problem (???) + SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE); + + // Create device + for (UINT i = 0; i < g_NumDriverTypes; ++i) + { + hr = D3D11CreateDevice( + nullptr, + g_DriverTypes[i], + nullptr, + /* D3D11_CREATE_DEVICE_BGRA_SUPPORT + * This flag adds support for surfaces with a different + * color channel ordering than the API default. + * You need it for compatibility with Direct2D. */ + D3D11_CREATE_DEVICE_BGRA_SUPPORT, + g_FeatureLevels, + g_NumFeatureLevels, + D3D11_SDK_VERSION, + &ipDevice, + &lFeatureLevel, + &ipDeviceContext); + + if (SUCCEEDED(hr)) + { + // Device creation success, no need to loop anymore + break; + } + + ipDevice = nullptr; + ipDeviceContext = nullptr; + } + + if (FAILED(hr)) { + return hr; + } + + if (nullptr == ipDevice) { + return E_UNEXPECTED; + } + + // load all monitor informations + hr = loadMonitorInfos(ipDevice); + if (FAILED(hr)) { + return hr; + } + + // set common fields + m_lD3DFeatureLevel = lFeatureLevel; + m_ipD3D11Device = ipDevice; + m_ipD3D11DeviceContext = ipDeviceContext; + + m_bInitialized = TRUE; + + return S_OK; +} + +HRESULT CDXGICapture::Terminate() +{ + AUTOLOCK(); + if (!m_bInitialized) { + return S_FALSE; // already terminated + } + + this->terminateDeviceResource(); + + m_ipD3D11Device = nullptr; + m_ipD3D11DeviceContext = nullptr; + m_lD3DFeatureLevel = D3D_FEATURE_LEVEL_INVALID; + + freeMonitorInfos(); + + m_bInitialized = FALSE; + return S_OK; +} + +HRESULT CDXGICapture::SetConfig(const tagScreenCaptureFilterConfig *pConfig) +{ + AUTOLOCK(); + if (!m_bInitialized) { + return D2DERR_NOT_INITIALIZED; + } + + if (nullptr == pConfig) { + return E_INVALIDARG; + } + + // terminate old resources + this->terminateDeviceResource(); + + HRESULT hr = S_OK; + const tagDublicatorMonitorInfo *pSelectedMonitorInfo = nullptr; + + pSelectedMonitorInfo = this->FindDublicatorMonitorInfo(pConfig->MonitorIdx); + if (nullptr == pSelectedMonitorInfo) { + return E_INVALIDARG; + } + + hr = this->createDeviceResource(pConfig, pSelectedMonitorInfo); + if (FAILED(hr)) { + return hr; + } + + return hr; +} + +HRESULT CDXGICapture::SetConfig(const tagScreenCaptureFilterConfig &config) +{ + return this->SetConfig(&config); +} + +BOOL CDXGICapture::IsInitialized() const +{ + AUTOLOCK(); + return m_bInitialized; +} + +D3D_FEATURE_LEVEL CDXGICapture::GetD3DFeatureLevel() const +{ + AUTOLOCK(); + return m_lD3DFeatureLevel; +} + +int CDXGICapture::GetDublicatorMonitorInfoCount() const +{ + AUTOLOCK(); + return (int)m_monitorInfos.size(); +} + +const tagDublicatorMonitorInfo* CDXGICapture::GetDublicatorMonitorInfo(int index) const +{ + AUTOLOCK(); + + size_t nCount = m_monitorInfos.size(); + if ((index < 0) || (index >= (int)nCount)) { + return nullptr; + } + + return m_monitorInfos[index]; +} // GetDublicatorMonitorInfo + +const tagDublicatorMonitorInfo* CDXGICapture::FindDublicatorMonitorInfo(int monitorIdx) const +{ + AUTOLOCK(); + + size_t nCount = m_monitorInfos.size(); + if (nCount == 0) { + return nullptr; + } + DublicatorMonitorInfoVec::const_iterator it = m_monitorInfos.begin(); + DublicatorMonitorInfoVec::const_iterator end = m_monitorInfos.end(); + for (size_t i = 0; (i < nCount) && (it != end); i++, it++) { + tagDublicatorMonitorInfo *pInfo = *it; + if (monitorIdx == pInfo->Idx) { + return pInfo; + } + } + + return nullptr; +} // FindDublicatorMonitorInfo + +// +// CaptureToFile +// +HRESULT CDXGICapture::CaptureToFile(_In_ LPCWSTR lpcwOutputFileName, _Out_opt_ BOOL *pRetIsTimeout /*= NULL*/, _Out_opt_ UINT *pRetRenderDuration /*= NULL*/) +{ + AUTOLOCK(); + + if (nullptr != pRetIsTimeout) { + *pRetIsTimeout = FALSE; + } + + if (nullptr != pRetRenderDuration) { + *pRetRenderDuration = 0xFFFFFFFF; + } + + if (!m_bInitialized) { + return D2DERR_NOT_INITIALIZED; + } + + CHECK_POINTER_EX(m_ipDxgiOutputDuplication, E_INVALIDARG); + CHECK_POINTER_EX(lpcwOutputFileName, E_INVALIDARG); + + HRESULT hr = S_OK; + + hr = DXGICaptureHelper::IsRendererInfoValid(&m_rendererInfo); + if (FAILED(hr)) { + return hr; + } + + // is valid? + hr = DXGICaptureHelper::GetContainerFormatByFileName(lpcwOutputFileName); + if (FAILED(hr)) { + return hr; + } + + DXGI_OUTDUPL_FRAME_INFO FrameInfo; + CComPtr ipDesktopResource; + CComPtr ipAcquiredDesktopImage; + CComPtr ipD2D1SourceBitmap; + + std::chrono::system_clock::time_point startTick; + if (nullptr != pRetRenderDuration) { + startTick = std::chrono::system_clock::now(); + } + + // Get new frame + hr = m_ipDxgiOutputDuplication->AcquireNextFrame(1000, &FrameInfo, &ipDesktopResource); + if (hr == DXGI_ERROR_WAIT_TIMEOUT) + { + if (nullptr != pRetIsTimeout) { + *pRetIsTimeout = TRUE; + } + return S_FALSE; + } + else if (FAILED(hr)) + { + return hr; + } + + // QI for ID3D11Texture2D + hr = ipDesktopResource->QueryInterface(IID_PPV_ARGS(&ipAcquiredDesktopImage)); + ipDesktopResource = nullptr; + CHECK_HR_RETURN(hr); + + if (nullptr == ipAcquiredDesktopImage) + { + // release frame + m_ipDxgiOutputDuplication->ReleaseFrame(); + return E_OUTOFMEMORY; + } + + // Copy needed full part of desktop image + m_ipD3D11DeviceContext->CopyResource(m_ipCopyTexture2D, ipAcquiredDesktopImage); + + if (m_rendererInfo.ShowCursor) { + hr = DXGICaptureHelper::GetMouse(m_ipDxgiOutputDuplication, &m_mouseInfo, &FrameInfo, (UINT)m_rendererInfo.MonitorIdx, m_desktopOutputDesc.DesktopCoordinates.left, m_desktopOutputDesc.DesktopCoordinates.top); + if (SUCCEEDED(hr) && m_mouseInfo.Visible) { + hr = DXGICaptureHelper::DrawMouse(&m_mouseInfo, &m_desktopOutputDesc, &m_tempMouseBuffer, m_ipCopyTexture2D); + } + + if (FAILED(hr)) { + // release frame + m_ipDxgiOutputDuplication->ReleaseFrame(); + return hr; + } + } + + // release frame + hr = m_ipDxgiOutputDuplication->ReleaseFrame(); + CHECK_HR_RETURN(hr); + + // create D2D1 source bitmap + hr = DXGICaptureHelper::CreateBitmap(m_ipD2D1RenderTarget, m_ipCopyTexture2D, &ipD2D1SourceBitmap); + CHECK_HR_RETURN(hr); + + D2D1_RECT_F rcSource = D2D1::RectF( + (FLOAT)m_rendererInfo.SrcBounds.X, + (FLOAT)m_rendererInfo.SrcBounds.Y, + (FLOAT)(m_rendererInfo.SrcBounds.X + m_rendererInfo.SrcBounds.Width), + (FLOAT)(m_rendererInfo.SrcBounds.Y + m_rendererInfo.SrcBounds.Height)); + D2D1_RECT_F rcTarget = D2D1::RectF( + (FLOAT)m_rendererInfo.DstBounds.X, + (FLOAT)m_rendererInfo.DstBounds.Y, + (FLOAT)(m_rendererInfo.DstBounds.X + m_rendererInfo.DstBounds.Width), + (FLOAT)(m_rendererInfo.DstBounds.Y + m_rendererInfo.DstBounds.Height)); + D2D1_POINT_2F ptTransformCenter = D2D1::Point2F(m_rendererInfo.OutputSize.Width / 2.0f, m_rendererInfo.OutputSize.Height / 2.0f); + + // Apply the rotation transform to the render target. + D2D1::Matrix3x2F rotate = D2D1::Matrix3x2F::Rotation( + m_rendererInfo.RotationDegrees, + ptTransformCenter + ); + + D2D1::Matrix3x2F scale = D2D1::Matrix3x2F::Scale( + D2D1::SizeF(m_rendererInfo.ScaleX, m_rendererInfo.ScaleY), + ptTransformCenter + ); + + // Priority: first rotate, after scale... + m_ipD2D1RenderTarget->SetTransform(rotate * scale); + + m_ipD2D1RenderTarget->BeginDraw(); + // clear background color + m_ipD2D1RenderTarget->Clear(D2D1::ColorF(D2D1::ColorF::Black, 1.0f)); + m_ipD2D1RenderTarget->DrawBitmap(ipD2D1SourceBitmap, rcTarget, 1.0f, D2D1_BITMAP_INTERPOLATION_MODE_LINEAR, rcSource); + // Reset transform + //m_ipD2D1RenderTarget->SetTransform(D2D1::Matrix3x2F::Identity()); + // Logo draw sample + //m_ipD2D1RenderTarget->DrawBitmap(ipBmpLogo, D2D1::RectF(0, 0, 2 * 200, 2 * 46)); + hr = m_ipD2D1RenderTarget->EndDraw(); + if (FAILED(hr)) { + return hr; + } + + // calculate render time without save + if (nullptr != pRetRenderDuration) { + *pRetRenderDuration = (UINT)((std::chrono::system_clock::now() - startTick).count() / 10000); + } + + hr = DXGICaptureHelper::SaveImageToFile(m_ipWICImageFactory, m_ipWICOutputBitmap, lpcwOutputFileName); + if (FAILED(hr)) { + return hr; + } + + return S_OK; +} // CaptureToFile + +#undef AUTOLOCK diff --git a/client/qt_gl_/yuvgl/media/DXGICapture.h b/client/qt_gl_/yuvgl/media/DXGICapture.h new file mode 100644 index 0000000..fd7a5c7 --- /dev/null +++ b/client/qt_gl_/yuvgl/media/DXGICapture.h @@ -0,0 +1,92 @@ +/***************************************************************************** +* DXGICapture.h +* +* Copyright (C) 2020 Gokhan Erdogdu +* +* DXGICapture is free software; you can redistribute it and/or modify it under +* the terms of the GNU Lesser General Public License as published by the Free +* Software Foundation; either version 2.1 of the License, or (at your option) +* any later version. +* +* DXGICapture is distributed in the hope that it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more +* details. +* +******************************************************************************/ +#pragma once +#ifndef __DXGICAPTURE_H__ +#define __DXGICAPTURE_H__ + +#include +#include + +#include +#include + +#include +#include // for ID2D1Effect +#include + +#include "DXGICaptureTypes.h" + +#define D3D_FEATURE_LEVEL_INVALID ((D3D_FEATURE_LEVEL)0x0) + +class CDXGICapture +{ +private: + ATL::CComAutoCriticalSection m_csLock; + + BOOL m_bInitialized; + DublicatorMonitorInfoVec m_monitorInfos; + tagRendererInfo m_rendererInfo; + + tagMouseInfo m_mouseInfo; + tagFrameBufferInfo m_tempMouseBuffer; + DXGI_OUTPUT_DESC m_desktopOutputDesc; + + D3D_FEATURE_LEVEL m_lD3DFeatureLevel; + CComPtr m_ipD3D11Device; + CComPtr m_ipD3D11DeviceContext; + + CComPtr m_ipDxgiOutputDuplication; + CComPtr m_ipCopyTexture2D; + + CComPtr m_ipD2D1Device; + CComPtr m_ipD2D1Factory; + CComPtr m_ipWICImageFactory; + CComPtr m_ipWICOutputBitmap; + CComPtr m_ipD2D1RenderTarget; + +public: + CDXGICapture(); + ~CDXGICapture(); + +private: + HRESULT loadMonitorInfos(ID3D11Device *pDevice); + void freeMonitorInfos(); + + HRESULT createDeviceResource( + const tagScreenCaptureFilterConfig *pConfig, + const tagDublicatorMonitorInfo *pSelectedMonitorInfo); + void terminateDeviceResource(); + +public: + HRESULT Initialize(); + HRESULT Terminate(); + HRESULT SetConfig(const tagScreenCaptureFilterConfig *pConfig); + HRESULT SetConfig(const tagScreenCaptureFilterConfig &config); + + BOOL IsInitialized() const; + D3D_FEATURE_LEVEL GetD3DFeatureLevel() const; + + int GetDublicatorMonitorInfoCount() const; + const tagDublicatorMonitorInfo* GetDublicatorMonitorInfo(int index) const; + const tagDublicatorMonitorInfo* FindDublicatorMonitorInfo(int monitorIdx) const; + + HRESULT CaptureToFile(_In_ LPCWSTR lpcwOutputFileName, _Out_opt_ BOOL *pRetIsTimeout = NULL, _Out_opt_ UINT *pRetRenderDuration = NULL); +}; + +#endif // __DXGICAPTURE_H__ + + diff --git a/client/qt_gl_/yuvgl/media/DXGICaptureHelper.h b/client/qt_gl_/yuvgl/media/DXGICaptureHelper.h new file mode 100644 index 0000000..8080582 --- /dev/null +++ b/client/qt_gl_/yuvgl/media/DXGICaptureHelper.h @@ -0,0 +1,960 @@ +/***************************************************************************** +* DXGICaptureHelper.h +* +* Copyright (C) 2020 Gokhan Erdogdu +* +* DXGICapture is free software; you can redistribute it and/or modify it under +* the terms of the GNU Lesser General Public License as published by the Free +* Software Foundation; either version 2.1 of the License, or (at your option) +* any later version. +* +* DXGICapture is distributed in the hope that it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more +* details. +* +******************************************************************************/ +#pragma once +#ifndef __DXGICAPTUREHELPER_H__ +#define __DXGICAPTUREHELPER_H__ + +#include +#include + +#include +#include + +#include +#include + +#include "DXGICaptureTypes.h" + +#pragma comment (lib, "Shlwapi.lib") + +// +// class DXGICaptureHelper +// +class DXGICaptureHelper +{ +public: + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + ConvertDxgiOutputToMonitorInfo( + _In_ const DXGI_OUTPUT_DESC *pDxgiOutput, + _In_ int monitorIdx, + _Out_ tagDublicatorMonitorInfo *pOutVal + ) + { + CHECK_POINTER(pOutVal); + // reset output parameter + RtlZeroMemory(pOutVal, sizeof(tagDublicatorMonitorInfo)); + CHECK_POINTER_EX(pDxgiOutput, E_INVALIDARG); + + switch (pDxgiOutput->Rotation) + { + case DXGI_MODE_ROTATION_UNSPECIFIED: + case DXGI_MODE_ROTATION_IDENTITY: + pOutVal->RotationDegrees = 0; + break; + + case DXGI_MODE_ROTATION_ROTATE90: + pOutVal->RotationDegrees = 90; + break; + + case DXGI_MODE_ROTATION_ROTATE180: + pOutVal->RotationDegrees = 180; + break; + + case DXGI_MODE_ROTATION_ROTATE270: + pOutVal->RotationDegrees = 270; + break; + } + + pOutVal->Idx = monitorIdx; + pOutVal->Bounds.X = pDxgiOutput->DesktopCoordinates.left; + pOutVal->Bounds.Y = pDxgiOutput->DesktopCoordinates.top; + pOutVal->Bounds.Width = pDxgiOutput->DesktopCoordinates.right - pDxgiOutput->DesktopCoordinates.left; + pOutVal->Bounds.Height = pDxgiOutput->DesktopCoordinates.bottom - pDxgiOutput->DesktopCoordinates.top; + + wsprintfW(pOutVal->DisplayName, L"Display %d: %ldx%ld @ %ld,%ld" + , monitorIdx + 1 + , pOutVal->Bounds.Width, pOutVal->Bounds.Height + , pOutVal->Bounds.X, pOutVal->Bounds.Y); + + return S_OK; + } // ConvertDxgiOutputToMonitorInfo + + static + COM_DECLSPEC_NOTHROW + inline + BOOL + IsEqualMonitorInfo( + _In_ const tagDublicatorMonitorInfo *p1, + _In_ const tagDublicatorMonitorInfo *p2 + ) + { + if (nullptr == p1) { + return (nullptr == p2); + } + if (nullptr == p2) { + return FALSE; + } + + return memcmp((const void*)p1, (const void*)p2, sizeof(tagDublicatorMonitorInfo)) == 0; + } // IsEqualMonitorInfo + + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + IsRendererInfoValid( + _In_ const tagRendererInfo *pRendererInfo + ) + { + CHECK_POINTER_EX(pRendererInfo, E_INVALIDARG); + + if (pRendererInfo->SrcFormat != DXGI_FORMAT_B8G8R8A8_UNORM) { + return D2DERR_UNSUPPORTED_PIXEL_FORMAT; + } + + if (pRendererInfo->SizeMode != tagFrameSizeMode_Normal) { + if ((pRendererInfo->OutputSize.Width <= 0) || (pRendererInfo->OutputSize.Height <= 0)) { + return D2DERR_BITMAP_BOUND_AS_TARGET; + } + } + + if ((pRendererInfo->DstBounds.Width <= 0) || (pRendererInfo->DstBounds.Height <= 0) || + (pRendererInfo->SrcBounds.Width <= 0) || (pRendererInfo->SrcBounds.Height <= 0)) + { + return D2DERR_ORIGINAL_TARGET_NOT_BOUND; + } + + return S_OK; + } + + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + CalculateRendererInfo( + _In_ const DXGI_OUTDUPL_DESC *pDxgiOutputDuplDesc, + _Inout_ tagRendererInfo *pRendererInfo + ) + { + CHECK_POINTER_EX(pDxgiOutputDuplDesc, E_INVALIDARG); + CHECK_POINTER_EX(pRendererInfo, E_INVALIDARG); + + pRendererInfo->SrcFormat = pDxgiOutputDuplDesc->ModeDesc.Format; + // get rotate state + switch (pDxgiOutputDuplDesc->Rotation) + { + case DXGI_MODE_ROTATION_ROTATE90: + pRendererInfo->RotationDegrees = 90.0f; + pRendererInfo->SrcBounds.X = 0; + pRendererInfo->SrcBounds.Y = 0; + pRendererInfo->SrcBounds.Width = pDxgiOutputDuplDesc->ModeDesc.Height; + pRendererInfo->SrcBounds.Height = pDxgiOutputDuplDesc->ModeDesc.Width; + break; + case DXGI_MODE_ROTATION_ROTATE180: + pRendererInfo->RotationDegrees = 180.0; + pRendererInfo->SrcBounds.X = 0; + pRendererInfo->SrcBounds.Y = 0; + pRendererInfo->SrcBounds.Width = pDxgiOutputDuplDesc->ModeDesc.Width; + pRendererInfo->SrcBounds.Height = pDxgiOutputDuplDesc->ModeDesc.Height; + break; + case DXGI_MODE_ROTATION_ROTATE270: + pRendererInfo->RotationDegrees = 270.0f; + pRendererInfo->SrcBounds.X = 0; + pRendererInfo->SrcBounds.Y = 0; + pRendererInfo->SrcBounds.Width = pDxgiOutputDuplDesc->ModeDesc.Height; + pRendererInfo->SrcBounds.Height = pDxgiOutputDuplDesc->ModeDesc.Width; + break; + default: // OR DXGI_MODE_ROTATION_IDENTITY: + pRendererInfo->RotationDegrees = 0.0f; + pRendererInfo->SrcBounds.X = 0; + pRendererInfo->SrcBounds.Y = 0; + pRendererInfo->SrcBounds.Width = pDxgiOutputDuplDesc->ModeDesc.Width; + pRendererInfo->SrcBounds.Height = pDxgiOutputDuplDesc->ModeDesc.Height; + break; + } + + // force rotate + switch (pRendererInfo->RotationMode) + { + case tagFrameRotationMode::tagFrameRotationMode_Identity: + pRendererInfo->RotationDegrees = 0.0f; + break; + case tagFrameRotationMode::tagFrameRotationMode_90: + pRendererInfo->RotationDegrees = 90.0f; + break; + case tagFrameRotationMode::tagFrameRotationMode_180: + pRendererInfo->RotationDegrees = 180.0f; + break; + case tagFrameRotationMode::tagFrameRotationMode_270: + pRendererInfo->RotationDegrees = 270.0f; + break; + default: // tagFrameRotationMode::tagFrameRotationMode_Auto + break; + } + + if (pRendererInfo->SizeMode == tagFrameSizeMode_Zoom) + { + FLOAT fSrcAspect, fOutAspect, fScaleFactor; + + // center for output + pRendererInfo->DstBounds.Width = pRendererInfo->SrcBounds.Width; + pRendererInfo->DstBounds.Height = pRendererInfo->SrcBounds.Height; + pRendererInfo->DstBounds.X = (pRendererInfo->OutputSize.Width - pRendererInfo->SrcBounds.Width) >> 1; + pRendererInfo->DstBounds.Y = (pRendererInfo->OutputSize.Height - pRendererInfo->SrcBounds.Height) >> 1; + + fOutAspect = (FLOAT)pRendererInfo->OutputSize.Width / pRendererInfo->OutputSize.Height; + + if ((pRendererInfo->RotationDegrees == 0.0f) || (pRendererInfo->RotationDegrees == 180.0f)) + { + fSrcAspect = (FLOAT)pRendererInfo->SrcBounds.Width / pRendererInfo->SrcBounds.Height; + + if (fSrcAspect > fOutAspect) + { + fScaleFactor = (FLOAT)pRendererInfo->OutputSize.Width / pRendererInfo->SrcBounds.Width; + } + else + { + fScaleFactor = (FLOAT)pRendererInfo->OutputSize.Height / pRendererInfo->SrcBounds.Height; + } + } + else // 90 or 270 degree + { + fSrcAspect = (FLOAT)pRendererInfo->SrcBounds.Height / pRendererInfo->SrcBounds.Width; + + if (fSrcAspect > fOutAspect) + { + fScaleFactor = (FLOAT)pRendererInfo->OutputSize.Width / pRendererInfo->SrcBounds.Height; + } + else + { + fScaleFactor = (FLOAT)pRendererInfo->OutputSize.Height / pRendererInfo->SrcBounds.Width; + } + } + + pRendererInfo->ScaleX = fScaleFactor; + pRendererInfo->ScaleY = fScaleFactor; + } + else if (pRendererInfo->SizeMode == tagFrameSizeMode_CenterImage) + { + // center for output + pRendererInfo->DstBounds.Width = pRendererInfo->SrcBounds.Width; + pRendererInfo->DstBounds.Height = pRendererInfo->SrcBounds.Height; + pRendererInfo->DstBounds.X = (pRendererInfo->OutputSize.Width - pRendererInfo->SrcBounds.Width) >> 1; + pRendererInfo->DstBounds.Y = (pRendererInfo->OutputSize.Height - pRendererInfo->SrcBounds.Height) >> 1; + } + else if (pRendererInfo->SizeMode == tagFrameSizeMode_AutoSize) + { + // set the destination bounds + pRendererInfo->DstBounds.Width = pRendererInfo->SrcBounds.Width; + pRendererInfo->DstBounds.Height = pRendererInfo->SrcBounds.Height; + + if ((pRendererInfo->RotationDegrees == 0.0f) || (pRendererInfo->RotationDegrees == 180.0f)) + { + // same as the source size + pRendererInfo->OutputSize.Width = pRendererInfo->SrcBounds.Width; + pRendererInfo->OutputSize.Height = pRendererInfo->SrcBounds.Height; + } + else // 90 or 270 degree + { + // same as the source size + pRendererInfo->OutputSize.Width = pRendererInfo->SrcBounds.Height; + pRendererInfo->OutputSize.Height = pRendererInfo->SrcBounds.Width; + + // center for output + pRendererInfo->DstBounds.X = (pRendererInfo->OutputSize.Width - pRendererInfo->SrcBounds.Width) >> 1; + pRendererInfo->DstBounds.Y = (pRendererInfo->OutputSize.Height - pRendererInfo->SrcBounds.Height) >> 1; + } + } + else if (pRendererInfo->SizeMode == tagFrameSizeMode_StretchImage) + { + // center for output + pRendererInfo->DstBounds.Width = pRendererInfo->SrcBounds.Width; + pRendererInfo->DstBounds.Height = pRendererInfo->SrcBounds.Height; + pRendererInfo->DstBounds.X = (pRendererInfo->OutputSize.Width - pRendererInfo->SrcBounds.Width) >> 1; + pRendererInfo->DstBounds.Y = (pRendererInfo->OutputSize.Height - pRendererInfo->SrcBounds.Height) >> 1; + + if ((pRendererInfo->RotationDegrees == 0.0f) || (pRendererInfo->RotationDegrees == 180.0f)) + { + pRendererInfo->ScaleX = (FLOAT)pRendererInfo->OutputSize.Width / pRendererInfo->DstBounds.Width; + pRendererInfo->ScaleY = (FLOAT)pRendererInfo->OutputSize.Height / pRendererInfo->DstBounds.Height; + } + else // 90 or 270 degree + { + pRendererInfo->ScaleX = (FLOAT)pRendererInfo->OutputSize.Width / pRendererInfo->DstBounds.Height; + pRendererInfo->ScaleY = (FLOAT)pRendererInfo->OutputSize.Height / pRendererInfo->DstBounds.Width; + } + } + else // tagFrameSizeMode_Normal + { + pRendererInfo->DstBounds.Width = pRendererInfo->SrcBounds.Width; + pRendererInfo->DstBounds.Height = pRendererInfo->SrcBounds.Height; + + if (pRendererInfo->RotationDegrees == 90) + { + // set destination origin (bottom-left) + pRendererInfo->DstBounds.X = (pRendererInfo->OutputSize.Width - pRendererInfo->OutputSize.Height) >> 1; + pRendererInfo->DstBounds.Y = ((pRendererInfo->OutputSize.Width + pRendererInfo->OutputSize.Height) >> 1) - pRendererInfo->DstBounds.Height; + } + else if (pRendererInfo->RotationDegrees == 180.0f) + { + // set destination origin (bottom-right) + pRendererInfo->DstBounds.X = pRendererInfo->OutputSize.Width - pRendererInfo->DstBounds.Width; + pRendererInfo->DstBounds.Y = pRendererInfo->OutputSize.Height - pRendererInfo->DstBounds.Height; + } + else if (pRendererInfo->RotationDegrees == 270) + { + // set destination origin (top-right) + pRendererInfo->DstBounds.Y = (pRendererInfo->OutputSize.Height - pRendererInfo->OutputSize.Width) >> 1; + pRendererInfo->DstBounds.X = pRendererInfo->OutputSize.Width - pRendererInfo->DstBounds.Width - ((pRendererInfo->OutputSize.Width - pRendererInfo->OutputSize.Height) >> 1); + } + } + + return S_OK; + } + + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + ResizeFrameBuffer( + _Inout_ tagFrameBufferInfo *pBufferInfo, + _In_ UINT uiNewSize + ) + { + CHECK_POINTER(pBufferInfo); + + if (uiNewSize <= pBufferInfo->BufferSize) + { + return S_FALSE; // no change + } + + if (nullptr != pBufferInfo->Buffer) { + delete[] pBufferInfo->Buffer; + pBufferInfo->Buffer = nullptr; + } + + pBufferInfo->Buffer = new (std::nothrow) BYTE[uiNewSize]; + if (!(pBufferInfo->Buffer)) + { + pBufferInfo->BufferSize = 0; + return E_OUTOFMEMORY; + } + pBufferInfo->BufferSize = uiNewSize; + + return S_OK; + } // ResizeFrameBuffer + + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + GetMouse( + _In_ IDXGIOutputDuplication *pOutputDuplication, + _Inout_ tagMouseInfo *PtrInfo, + _In_ DXGI_OUTDUPL_FRAME_INFO *FrameInfo, + UINT MonitorIdx, + INT OffsetX, + INT OffsetY + ) + { + CHECK_POINTER_EX(pOutputDuplication, E_INVALIDARG); + CHECK_POINTER_EX(PtrInfo, E_INVALIDARG); + CHECK_POINTER_EX(FrameInfo, E_INVALIDARG); + + // A non-zero mouse update timestamp indicates that there is a mouse position update and optionally a shape change + if (FrameInfo->LastMouseUpdateTime.QuadPart == 0) + { + return S_OK; + } + + bool UpdatePosition = true; + + // Make sure we don't update pointer position wrongly + // If pointer is invisible, make sure we did not get an update from another output that the last time that said pointer + // was visible, if so, don't set it to invisible or update. + if (!FrameInfo->PointerPosition.Visible && (PtrInfo->WhoUpdatedPositionLast != MonitorIdx)) + { + UpdatePosition = false; + } + + // If two outputs both say they have a visible, only update if new update has newer timestamp + if (FrameInfo->PointerPosition.Visible && PtrInfo->Visible && (PtrInfo->WhoUpdatedPositionLast != MonitorIdx) && (PtrInfo->LastTimeStamp.QuadPart > FrameInfo->LastMouseUpdateTime.QuadPart)) + { + UpdatePosition = false; + } + + // Update position + if (UpdatePosition) + { + PtrInfo->Position.x = FrameInfo->PointerPosition.Position.x - OffsetX; + PtrInfo->Position.y = FrameInfo->PointerPosition.Position.y - OffsetY; + PtrInfo->WhoUpdatedPositionLast = MonitorIdx; + PtrInfo->LastTimeStamp = FrameInfo->LastMouseUpdateTime; + PtrInfo->Visible = FrameInfo->PointerPosition.Visible != 0; + } + + // No new shape + if (FrameInfo->PointerShapeBufferSize == 0) + { + return S_OK; + } + + // Old buffer too small + if (FrameInfo->PointerShapeBufferSize > PtrInfo->ShapeBufferSize) + { + if (PtrInfo->PtrShapeBuffer != nullptr) + { + delete[] PtrInfo->PtrShapeBuffer; + PtrInfo->PtrShapeBuffer = nullptr; + } + PtrInfo->PtrShapeBuffer = new (std::nothrow) BYTE[FrameInfo->PointerShapeBufferSize]; + if (PtrInfo->PtrShapeBuffer == nullptr) + { + PtrInfo->ShapeBufferSize = 0; + return E_OUTOFMEMORY; + } + + // Update buffer size + PtrInfo->ShapeBufferSize = FrameInfo->PointerShapeBufferSize; + } + + // Get shape + UINT BufferSizeRequired; + HRESULT hr = pOutputDuplication->GetFramePointerShape( + FrameInfo->PointerShapeBufferSize, + reinterpret_cast(PtrInfo->PtrShapeBuffer), + &BufferSizeRequired, + &(PtrInfo->ShapeInfo) + ); + if (FAILED(hr)) + { + delete[] PtrInfo->PtrShapeBuffer; + PtrInfo->PtrShapeBuffer = nullptr; + PtrInfo->ShapeBufferSize = 0; + return hr; + } + + return S_OK; + } // GetMouse + + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + ProcessMouseMask( + _In_ const tagMouseInfo *PtrInfo, + _In_ const DXGI_OUTPUT_DESC *DesktopDesc, + _Inout_ tagFrameBufferInfo *pBufferInfo + ) + { + CHECK_POINTER_EX(PtrInfo, E_INVALIDARG); + CHECK_POINTER_EX(DesktopDesc, E_INVALIDARG); + CHECK_POINTER_EX(pBufferInfo, E_INVALIDARG); + + if (!PtrInfo->Visible) { + return S_FALSE; + } + + HRESULT hr = S_OK; + INT DesktopWidth = (INT)(DesktopDesc->DesktopCoordinates.right - DesktopDesc->DesktopCoordinates.left); + INT DesktopHeight = (INT)(DesktopDesc->DesktopCoordinates.bottom - DesktopDesc->DesktopCoordinates.top); + + pBufferInfo->Bounds.X = PtrInfo->Position.x; + pBufferInfo->Bounds.Y = PtrInfo->Position.y; + pBufferInfo->Bounds.Width = PtrInfo->ShapeInfo.Width; + pBufferInfo->Bounds.Height = (PtrInfo->ShapeInfo.Type == DXGI_OUTDUPL_POINTER_SHAPE_TYPE_MONOCHROME) + ? (INT)(PtrInfo->ShapeInfo.Height / 2) + : (INT)PtrInfo->ShapeInfo.Height; + pBufferInfo->Pitch = pBufferInfo->Bounds.Width * 4; + + switch (PtrInfo->ShapeInfo.Type) + { + case DXGI_OUTDUPL_POINTER_SHAPE_TYPE_COLOR: + { + // Resize mouseshape buffer (if necessary) + hr = DXGICaptureHelper::ResizeFrameBuffer(pBufferInfo, PtrInfo->ShapeBufferSize); + if (FAILED(hr)) { + return hr; + } + + // use current mouseshape buffer + // Copy mouseshape buffer + memcpy_s((void*)pBufferInfo->Buffer, pBufferInfo->BufferSize, (const void*)PtrInfo->PtrShapeBuffer, PtrInfo->ShapeBufferSize); + break; + } + + case DXGI_OUTDUPL_POINTER_SHAPE_TYPE_MONOCHROME: + { + // Resize mouseshape buffer (if necessary) + hr = DXGICaptureHelper::ResizeFrameBuffer(pBufferInfo, pBufferInfo->Bounds.Height * pBufferInfo->Pitch); + if (FAILED(hr)) { + return hr; + } + + UINT* InitBuffer32 = reinterpret_cast(pBufferInfo->Buffer); + + for (INT Row = 0; Row < pBufferInfo->Bounds.Height; ++Row) + { + // Set mask + BYTE Mask = 0x80; + for (INT Col = 0; Col < pBufferInfo->Bounds.Width; ++Col) + { + BYTE XorMask = PtrInfo->PtrShapeBuffer[(Col / 8) + ((Row + (PtrInfo->ShapeInfo.Height / 2)) * (PtrInfo->ShapeInfo.Pitch))] & Mask; + + // Set new pixel + InitBuffer32[(Row * pBufferInfo->Bounds.Width) + Col] = (XorMask) ? 0xFFFFFFFF : 0x00000000; + + // Adjust mask + if (Mask == 0x01) + { + Mask = 0x80; + } + else + { + Mask = Mask >> 1; + } + } + } + + break; + } + + case DXGI_OUTDUPL_POINTER_SHAPE_TYPE_MASKED_COLOR: + { + // Resize mouseshape buffer (if necessary) + hr = DXGICaptureHelper::ResizeFrameBuffer(pBufferInfo, pBufferInfo->Bounds.Height * pBufferInfo->Pitch); + if (FAILED(hr)) { + return hr; + } + + UINT* InitBuffer32 = reinterpret_cast(pBufferInfo->Buffer); + UINT* ShapeBuffer32 = reinterpret_cast(PtrInfo->PtrShapeBuffer); + + for (INT Row = 0; Row < pBufferInfo->Bounds.Height; ++Row) + { + for (INT Col = 0; Col < pBufferInfo->Bounds.Width; ++Col) + { + InitBuffer32[(Row * pBufferInfo->Bounds.Width) + Col] = ShapeBuffer32[Col + (Row * (PtrInfo->ShapeInfo.Pitch / sizeof(UINT)))] | 0xFF000000; + } + } + + break; + } + + default: + return E_INVALIDARG; + + } + + UINT* InitBuffer32 = reinterpret_cast(pBufferInfo->Buffer); + UINT width = (UINT)pBufferInfo->Bounds.Width; + UINT height = (UINT)pBufferInfo->Bounds.Height; + + switch (DesktopDesc->Rotation) + { + case DXGI_MODE_ROTATION_ROTATE90: + { + // Rotate -90 or +270 + for (UINT i = 0; i < width; i++) + { + for (UINT j = 0; j < height; j++) + { + UINT I = j; + UINT J = width - 1 - i; + while ((i*height + j) >(I*width + J)) + { + UINT p = I*width + J; + UINT tmp_i = p / height; + UINT tmp_j = p % height; + I = tmp_j; + J = width - 1 - tmp_i; + } + std::swap(*(InitBuffer32 + (i*height + j)), *(InitBuffer32 + (I*width + J))); + } + } + + // translate bounds + std::swap(pBufferInfo->Bounds.Width, pBufferInfo->Bounds.Height); + INT nX = pBufferInfo->Bounds.Y; + INT nY = DesktopWidth - (INT)(pBufferInfo->Bounds.X + pBufferInfo->Bounds.Height); + pBufferInfo->Bounds.X = nX; + pBufferInfo->Bounds.Y = nY; + pBufferInfo->Pitch = pBufferInfo->Bounds.Width * 4; + } break; + case DXGI_MODE_ROTATION_ROTATE180: + { + // Rotate -180 or +180 + if (height % 2 != 0) + { + //If N is odd reverse the middle row in the matrix + UINT j = height >> 1; + for (UINT i = 0; i < (width >> 1); i++) + { + std::swap(InitBuffer32[j * width + i], InitBuffer32[j * width + width - i - 1]); + } + } + + for (UINT j = 0; j < (height >> 1); j++) + { + for (UINT i = 0; i < width; i++) + { + std::swap(InitBuffer32[j * width + i], InitBuffer32[(height - j - 1) * width + width - i - 1]); + } + } + + // translate position + INT nX = DesktopWidth - (INT)(pBufferInfo->Bounds.X + pBufferInfo->Bounds.Width); + INT nY = DesktopHeight - (INT)(pBufferInfo->Bounds.Y + pBufferInfo->Bounds.Height); + pBufferInfo->Bounds.X = nX; + pBufferInfo->Bounds.Y = nY; + } break; + case DXGI_MODE_ROTATION_ROTATE270: + { + // Rotate -270 or +90 + for (UINT i = 0; i < width; i++) + { + for (UINT j = 0; j < height; j++) + { + UINT I = height - 1 - j; + UINT J = i; + while ((i*height + j) >(I*width + J)) + { + int p = I*width + J; + int tmp_i = p / height; + int tmp_j = p % height; + I = height - 1 - tmp_j; + J = tmp_i; + } + std::swap(*(InitBuffer32 + (i*height + j)), *(InitBuffer32 + (I*width + J))); + } + } + + // translate bounds + std::swap(pBufferInfo->Bounds.Width, pBufferInfo->Bounds.Height); + INT nX = DesktopHeight - (pBufferInfo->Bounds.Y + pBufferInfo->Bounds.Width); + INT nY = pBufferInfo->Bounds.X; + pBufferInfo->Bounds.X = nX; + pBufferInfo->Bounds.Y = nY; + pBufferInfo->Pitch = pBufferInfo->Bounds.Width * 4; + } break; + } + + return S_OK; + } // ProcessMouseMask + + // + // Draw mouse provided in buffer to backbuffer + // + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + DrawMouse( + _In_ tagMouseInfo *PtrInfo, + _In_ const DXGI_OUTPUT_DESC *DesktopDesc, + _Inout_ tagFrameBufferInfo *pTempMouseBuffer, + _Inout_ ID3D11Texture2D *pSharedSurf + ) + { + CHECK_POINTER_EX(PtrInfo, E_INVALIDARG); + CHECK_POINTER_EX(DesktopDesc, E_INVALIDARG); + CHECK_POINTER_EX(pTempMouseBuffer, E_INVALIDARG); + CHECK_POINTER_EX(pSharedSurf, E_INVALIDARG); + + HRESULT hr = S_OK; + + D3D11_TEXTURE2D_DESC FullDesc; + pSharedSurf->GetDesc(&FullDesc); + + INT SurfWidth = FullDesc.Width; + INT SurfHeight = FullDesc.Height; + INT SurfPitch = FullDesc.Width * 4; + + hr = DXGICaptureHelper::ProcessMouseMask(PtrInfo, DesktopDesc, pTempMouseBuffer); + if (FAILED(hr)) { + return hr; + } + + // Buffer used if necessary (in case of monochrome or masked pointer) + BYTE* InitBuffer = pTempMouseBuffer->Buffer; + + // Clipping adjusted coordinates / dimensions + INT PtrWidth = (INT)pTempMouseBuffer->Bounds.Width; + INT PtrHeight = (INT)pTempMouseBuffer->Bounds.Height; + + INT PtrLeft = (INT)pTempMouseBuffer->Bounds.X; + INT PtrTop = (INT)pTempMouseBuffer->Bounds.Y; + INT PtrPitch = (INT)pTempMouseBuffer->Pitch; + + INT SrcLeft = 0; + INT SrcTop = 0; + INT SrcWidth = PtrWidth; + INT SrcHeight = PtrHeight; + + if (PtrLeft < 0) + { + // crop mouseshape left + SrcLeft = -PtrLeft; + // new mouse x position for drawing + PtrLeft = 0; + } + else if (PtrLeft + PtrWidth > SurfWidth) + { + // crop mouseshape width + SrcWidth = SurfWidth - PtrLeft; + } + + if (PtrTop < 0) + { + // crop mouseshape top + SrcTop = -PtrTop; + // new mouse y position for drawing + PtrTop = 0; + } + else if (PtrTop + PtrHeight > SurfHeight) + { + // crop mouseshape height + SrcHeight = SurfHeight - PtrTop; + } + + // QI for IDXGISurface + CComPtr ipCopySurface; + hr = pSharedSurf->QueryInterface(__uuidof(IDXGISurface), (void **)&ipCopySurface); + if (SUCCEEDED(hr)) { + // Map pixels + DXGI_MAPPED_RECT MappedSurface; + hr = ipCopySurface->Map(&MappedSurface, DXGI_MAP_READ | DXGI_MAP_WRITE); + if (SUCCEEDED(hr)) + { + // 0xAARRGGBB + UINT* SrcBuffer32 = reinterpret_cast(InitBuffer); + UINT* DstBuffer32 = reinterpret_cast(MappedSurface.pBits) + PtrTop * SurfWidth + PtrLeft; + + // Alpha blending masks + const UINT AMask = 0xFF000000; + const UINT RBMask = 0x00FF00FF; + const UINT GMask = 0x0000FF00; + const UINT AGMask = AMask | GMask; + const UINT OneAlpha = 0x01000000; + UINT uiPixel1; + UINT uiPixel2; + UINT uiAlpha; + UINT uiNAlpha; + UINT uiRedBlue; + UINT uiAlphaGreen; + + for (INT Row = SrcTop; Row < SrcHeight; ++Row) + { + for (INT Col = SrcLeft; Col < SrcWidth; ++Col) + { + // Alpha blending + uiPixel1 = DstBuffer32[((Row - SrcTop) * SurfWidth) + (Col - SrcLeft)]; + uiPixel2 = SrcBuffer32[(Row * PtrWidth) + Col]; + uiAlpha = (uiPixel2 & AMask) >> 24; + uiNAlpha = 255 - uiAlpha; + uiRedBlue = ((uiNAlpha * (uiPixel1 & RBMask)) + (uiAlpha * (uiPixel2 & RBMask))) >> 8; + uiAlphaGreen = (uiNAlpha * ((uiPixel1 & AGMask) >> 8)) + (uiAlpha * (OneAlpha | ((uiPixel2 & GMask) >> 8))); + + DstBuffer32[((Row - SrcTop) * SurfWidth) + (Col - SrcLeft)] = ((uiRedBlue & RBMask) | (uiAlphaGreen & AGMask)); + } + } + } + + // Done with resource + hr = ipCopySurface->Unmap(); + } + + return S_OK; + } // DrawMouse + + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + CreateBitmap( + _In_ ID2D1RenderTarget *pRenderTarget, + _In_ ID3D11Texture2D *pSourceTexture, + _Outptr_ ID2D1Bitmap **ppOutBitmap + ) + { + CHECK_POINTER(ppOutBitmap); + *ppOutBitmap = nullptr; + CHECK_POINTER_EX(pRenderTarget, E_INVALIDARG); + CHECK_POINTER_EX(pSourceTexture, E_INVALIDARG); + + HRESULT hr = S_OK; + CComPtr ipSourceTexture(pSourceTexture); + CComPtr ipCopySurface; + CComPtr ipD2D1SourceBitmap; + + // QI for IDXGISurface + hr = ipSourceTexture->QueryInterface(__uuidof(IDXGISurface), (void **)&ipCopySurface); + CHECK_HR_RETURN(hr); + + // Map pixels + DXGI_MAPPED_RECT MappedSurface; + hr = ipCopySurface->Map(&MappedSurface, DXGI_MAP_READ); + CHECK_HR_RETURN(hr); + + D3D11_TEXTURE2D_DESC destImageDesc; + ipSourceTexture->GetDesc(&destImageDesc); + + hr = pRenderTarget->CreateBitmap( + D2D1::SizeU(destImageDesc.Width, destImageDesc.Height), + (const void*)MappedSurface.pBits, + MappedSurface.Pitch, + D2D1::BitmapProperties(D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_PREMULTIPLIED)), + &ipD2D1SourceBitmap); + if (FAILED(hr)) + { + // Done with resource + hr = ipCopySurface->Unmap(); + return hr; + } + + // Done with resource + hr = ipCopySurface->Unmap(); + CHECK_HR_RETURN(hr); + + // set return value + *ppOutBitmap = ipD2D1SourceBitmap.Detach(); + + return S_OK; + } // CreateBitmap + + static + inline + COM_DECLSPEC_NOTHROW + HRESULT + GetContainerFormatByFileName( + _In_ LPCWSTR lpcwFileName, + _Out_opt_ GUID *pRetVal = NULL + ) + { + RESET_POINTER_EX(pRetVal, GUID_NULL); + CHECK_POINTER_EX(lpcwFileName, E_INVALIDARG); + + if (lstrlenW(lpcwFileName) == 0) { + return E_INVALIDARG; + } + + LPCWSTR lpcwExtension = ::PathFindExtensionW(lpcwFileName); + if (lstrlenW(lpcwExtension) == 0) { + return MK_E_INVALIDEXTENSION; // ERROR_MRM_INVALID_FILE_TYPE + } + + if (lstrcmpiW(lpcwExtension, L".bmp") == 0) + { + RESET_POINTER_EX(pRetVal, GUID_ContainerFormatBmp); + } + else if ((lstrcmpiW(lpcwExtension, L".tif") == 0) || + (lstrcmpiW(lpcwExtension, L".tiff") == 0)) + { + RESET_POINTER_EX(pRetVal, GUID_ContainerFormatTiff); + } + else if (lstrcmpiW(lpcwExtension, L".png") == 0) + { + RESET_POINTER_EX(pRetVal, GUID_ContainerFormatPng); + } + else if ((lstrcmpiW(lpcwExtension, L".jpg") == 0) || + (lstrcmpiW(lpcwExtension, L".jpeg") == 0)) + { + RESET_POINTER_EX(pRetVal, GUID_ContainerFormatJpeg); + } + else + { + return ERROR_MRM_INVALID_FILE_TYPE; + } + + return S_OK; + } + + + static + COM_DECLSPEC_NOTHROW + inline + HRESULT + SaveImageToFile( + _In_ IWICImagingFactory *pWICImagingFactory, + _In_ IWICBitmapSource *pWICBitmapSource, + _In_ LPCWSTR lpcwFileName + ) + { + CHECK_POINTER_EX(pWICImagingFactory, E_INVALIDARG); + CHECK_POINTER_EX(pWICBitmapSource, E_INVALIDARG); + + HRESULT hr = S_OK; + GUID guidContainerFormat; + + hr = GetContainerFormatByFileName(lpcwFileName, &guidContainerFormat); + if (FAILED(hr)) { + return hr; + } + + WICPixelFormatGUID format = GUID_WICPixelFormatDontCare; + CComPtr ipWICImagingFactory(pWICImagingFactory); + CComPtr ipWICBitmapSource(pWICBitmapSource); + CComPtr ipStream; + CComPtr ipEncoder; + CComPtr ipFrameEncode; + unsigned int uiWidth = 0; + unsigned int uiHeight = 0; + + hr = ipWICImagingFactory->CreateStream(&ipStream); + if (SUCCEEDED(hr)) { + hr = ipStream->InitializeFromFilename(lpcwFileName, GENERIC_WRITE); + } + + if (SUCCEEDED(hr)) { + hr = ipWICImagingFactory->CreateEncoder(guidContainerFormat, NULL, &ipEncoder); + } + if (SUCCEEDED(hr)) + { + hr = ipEncoder->Initialize(ipStream, WICBitmapEncoderNoCache); + } + if (SUCCEEDED(hr)) + { + hr = ipEncoder->CreateNewFrame(&ipFrameEncode, NULL); + } + if (SUCCEEDED(hr)) + { + hr = ipFrameEncode->Initialize(NULL); + } + if (SUCCEEDED(hr)) + { + hr = ipWICBitmapSource->GetSize(&uiWidth, &uiHeight); + } + if (SUCCEEDED(hr)) + { + hr = ipFrameEncode->SetSize(uiWidth, uiHeight); + } + if (SUCCEEDED(hr)) + { + hr = ipFrameEncode->SetPixelFormat(&format); + } + if (SUCCEEDED(hr)) + { + hr = ipFrameEncode->WriteSource(ipWICBitmapSource, NULL); + } + if (SUCCEEDED(hr)) + { + hr = ipFrameEncode->Commit(); + } + if (SUCCEEDED(hr)) + { + hr = ipEncoder->Commit(); + } + + return hr; + } // SaveImageToFile + +}; // end class DXGICaptureHelper + +#endif // __DXGICAPTUREHELPER_H__ diff --git a/client/qt_gl_/yuvgl/media/DXGICaptureTypes.h b/client/qt_gl_/yuvgl/media/DXGICaptureTypes.h new file mode 100644 index 0000000..bda220f --- /dev/null +++ b/client/qt_gl_/yuvgl/media/DXGICaptureTypes.h @@ -0,0 +1,150 @@ +/***************************************************************************** +* DXGICaptureTypes.h +* +* Copyright (C) 2020 Gokhan Erdogdu +* +* DXGICapture is free software; you can redistribute it and/or modify it under +* the terms of the GNU Lesser General Public License as published by the Free +* Software Foundation; either version 2.1 of the License, or (at your option) +* any later version. +* +* DXGICapture is distributed in the hope that it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more +* details. +* +******************************************************************************/ +#pragma once +#ifndef __DXGICAPTURETYPES_H__ +#define __DXGICAPTURETYPES_H__ + +#include +#include +#include +#include + +// +// enum tagFrameSizeMode_e +// +typedef enum tagFrameSizeMode_e : UINT +{ + tagFrameSizeMode_Normal = 0x0, + tagFrameSizeMode_StretchImage = 0x1, + tagFrameSizeMode_AutoSize = 0x2, + tagFrameSizeMode_CenterImage = 0x3, + tagFrameSizeMode_Zoom = 0x4, +} tagFrameSizeMode; + +// +// enum tagFrameRotationMode_e +// +typedef enum tagFrameRotationMode_e : UINT +{ + tagFrameRotationMode_Auto = 0x0, + tagFrameRotationMode_Identity = 0x1, + tagFrameRotationMode_90 = 0x2, + tagFrameRotationMode_180 = 0x3, + tagFrameRotationMode_270 = 0x4, +} tagFrameRotationMode; + +// +// Holds info about the pointer/cursor +// struct tagMouseInfo_s +// +typedef struct tagMouseInfo_s +{ + UINT ShapeBufferSize; + _Field_size_bytes_(ShapeBufferSize) BYTE* PtrShapeBuffer; + DXGI_OUTDUPL_POINTER_SHAPE_INFO ShapeInfo; + POINT Position; + bool Visible; + UINT WhoUpdatedPositionLast; + LARGE_INTEGER LastTimeStamp; +} tagMouseInfo; + +// +// struct tagFrameSize_s +// +typedef struct tagFrameSize_s +{ + LONG Width; + LONG Height; +} tagFrameSize; + +// +// struct tagBounds_s +// +typedef struct tagFrameBounds_s +{ + LONG X; + LONG Y; + LONG Width; + LONG Height; +} tagFrameBounds; + +// +// struct tagFrameBufferInfo_s +// +typedef struct tagFrameBufferInfo_s +{ + UINT BufferSize; + _Field_size_bytes_(BufferSize) BYTE* Buffer; + INT BytesPerPixel; + tagFrameBounds Bounds; + INT Pitch; +} tagFrameBufferInfo; + +// +// struct tagDublicatorMonitorInfo_s +// +typedef struct tagDublicatorMonitorInfo_s +{ + INT Idx; + WCHAR DisplayName[64]; + INT RotationDegrees; + tagFrameBounds Bounds; +} tagDublicatorMonitorInfo; + +typedef std::vector DublicatorMonitorInfoVec; + +// +// struct tagScreenCaptureFilterConfig_s +// +typedef struct tagScreenCaptureFilterConfig_s +{ +public: + INT MonitorIdx; + INT ShowCursor; + tagFrameRotationMode RotationMode; + tagFrameSizeMode SizeMode; + tagFrameSize OutputSize; /* Discard for tagFrameSizeMode_AutoSize */ +} tagScreenCaptureFilterConfig; + +// +// struct tagRendererInfo_s +// +typedef struct tagRendererInfo_s +{ + INT MonitorIdx; + INT ShowCursor; + tagFrameRotationMode RotationMode; + tagFrameSizeMode SizeMode; + tagFrameSize OutputSize; + + FLOAT RotationDegrees; + FLOAT ScaleX; + FLOAT ScaleY; + DXGI_FORMAT SrcFormat; + tagFrameBounds SrcBounds; + tagFrameBounds DstBounds; +} tagRendererInfo; + +// macros +#define RESET_POINTER_EX(p, v) if (nullptr != (p)) { *(p) = (v); } +#define RESET_POINTER(p) RESET_POINTER_EX(p, nullptr) +#define CHECK_POINTER_EX(p, hr) if (nullptr == (p)) { return (hr); } +#define CHECK_POINTER(p) CHECK_POINTER_EX(p, E_POINTER) +#define CHECK_HR_BREAK(hr) if (FAILED(hr)) { break; } +#define CHECK_HR_RETURN(hr) { HRESULT hr_379f4648 = hr; if (FAILED(hr_379f4648)) { return hr_379f4648; } } + +#endif // __DXGICAPTURETYPES_H__ diff --git a/client/qt_gl_/yuvgl/media/VideoCoder.h b/client/qt_gl_/yuvgl/media/VideoCoder.h index 60dc09b..4c66b28 100644 --- a/client/qt_gl_/yuvgl/media/VideoCoder.h +++ b/client/qt_gl_/yuvgl/media/VideoCoder.h @@ -14,7 +14,6 @@ extern "C" }; #include #else -//Linux... #ifdef __cplusplus extern "C" { diff --git a/client/qt_gl_/yuvgl/media/audiocaptureff.cpp b/client/qt_gl_/yuvgl/media/audiocaptureff.cpp index 8ec86ad..7f8f71a 100644 --- a/client/qt_gl_/yuvgl/media/audiocaptureff.cpp +++ b/client/qt_gl_/yuvgl/media/audiocaptureff.cpp @@ -122,9 +122,9 @@ int CaptureAudioFfmpeg::InitCapture(wstring url, uint16_t rate, uint8_t channel) return -1; } //av_dump_format(infmt_ctx, 0, fileAudioInput.c_str(), 1); - //END输入文件 + //ENDÊäÈëÎļþ - //打开解ç å™¨ + //´ò¿ª½âÂëÆ÷ static AVCodec* decodec = avcodec_find_decoder(mInfmt_ctx->streams[0]->codec->codec_id); if (!decodec) { printf("failed find decoder\n"); @@ -134,11 +134,11 @@ int CaptureAudioFfmpeg::InitCapture(wstring url, uint16_t rate, uint8_t channel) printf("failed open decoder\n"); return -1; } - //END解ç å™¨ - //é‡é‡‡æ ·åˆå§‹åŒ– + //END½âÂëÆ÷ + //ÖزÉÑù³õʼ»¯ initAudioFilters(); - //ENDé‡é‡‡æ ·åˆå§‹åŒ– - //ç¼–ç å™¨ + //ENDÖزÉÑù³õʼ»¯ + //±àÂëÆ÷ static AVCodec* codec = NULL; //codec = avcodec_find_encoder_by_name("libmp3lame"); codec = avcodec_find_encoder(AV_CODEC_ID_AAC); @@ -161,8 +161,8 @@ int CaptureAudioFfmpeg::InitCapture(wstring url, uint16_t rate, uint8_t channel) avcodec_free_context(&codec_ctx); return -1; } - //ENDç¼–ç å™¨ - //输出文件 + //END±àÂëÆ÷ + //Êä³öÎļþ AVFormatContext* outfmt_ctx = NULL; if (0 > avformat_alloc_output_context2(&outfmt_ctx, NULL, NULL, "aac.aac")) { printf("failed alloc outputcontext\n"); @@ -188,7 +188,7 @@ int CaptureAudioFfmpeg::InitCapture(wstring url, uint16_t rate, uint8_t channel) return -1; } avformat_write_header(outfmt_ctx, NULL); - //END输出文件 + //ENDÊä³öÎļþ #if 0 AVFrame* Frame = av_frame_alloc(); Frame->nb_samples = codec_ctx->frame_size; @@ -288,7 +288,8 @@ int CaptureAudioFfmpeg::initAudioFilters() sprintf_s(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%I64x", time_base.num, time_base.den, audioDecoderContext->sample_rate, - av_get_sample_fmt_name(audioDecoderContext->sample_fmt), audioDecoderContext->channel_layout); + av_get_sample_fmt_name(audioDecoderContext->sample_fmt), + audioDecoderContext->channel_layout); ret = avfilter_graph_create_filter(&mBuffersrcCtx, abuffersrc, "in", args, NULL, mFilterGraph); diff --git a/client/qt_gl_/yuvgl/media/screen_capture.cpp b/client/qt_gl_/yuvgl/media/screen_capture.cpp new file mode 100644 index 0000000..370a964 --- /dev/null +++ b/client/qt_gl_/yuvgl/media/screen_capture.cpp @@ -0,0 +1,31 @@ +#include "screen_capture.h" + +#include +#include +#include +#include + +ScreenCapture::ScreenCapture() +{ + +} + +BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor,HDC hdcMonitor,LPRECT lprcMonitor,LPARAM dwData) +{ + MONITORINFOEX mi; + mi.cbSize=sizeof(MONITORINFOEX); + GetMonitorInfo(hMonitor,&mi); + qDebug()< + +class ScreenCapture +{ +public: + ScreenCapture(); + void EnumScreen(); +}; + +#endif // SCREEN_CAPTURE_H + diff --git a/client/qt_gl_/yuvgl/qedit.h b/client/qt_gl_/yuvgl/qedit.h new file mode 100644 index 0000000..a520288 --- /dev/null +++ b/client/qt_gl_/yuvgl/qedit.h @@ -0,0 +1,66 @@ + +#include +#include + +#pragma comment(lib, "strmiids.lib") + +#ifndef __qedit_h__ +#define __qedit_h__ + +/////////////////////////////////////////////////////////////////////////////////// + +#pragma once + +/////////////////////////////////////////////////////////////////////////////////// + +struct __declspec(uuid("0579154a-2b53-4994-b0d0-e773148eff85")) + ISampleGrabberCB : IUnknown +{ + // + // Raw methods provided by interface + // + + virtual HRESULT __stdcall SampleCB( + double SampleTime, + struct IMediaSample * pSample) = 0; + virtual HRESULT __stdcall BufferCB( + double SampleTime, + unsigned char * pBuffer, + long BufferLen) = 0; +}; + + + + +struct __declspec(uuid("6b652fff-11fe-4fce-92ad-0266b5d7c78f")) + ISampleGrabber : IUnknown +{ + // + // Raw methods provided by interface + // + + virtual HRESULT __stdcall SetOneShot( + long OneShot) = 0; + virtual HRESULT __stdcall SetMediaType( + struct _AMMediaType * pType) = 0; + virtual HRESULT __stdcall GetConnectedMediaType( + struct _AMMediaType * pType) = 0; + virtual HRESULT __stdcall SetBufferSamples( + long BufferThem) = 0; + virtual HRESULT __stdcall GetCurrentBuffer( + /*[in,out]*/ long * pBufferSize, + /*[out]*/ long * pBuffer) = 0; + virtual HRESULT __stdcall GetCurrentSample( + /*[out,retval]*/ struct IMediaSample * * ppSample) = 0; + virtual HRESULT __stdcall SetCallback( + struct ISampleGrabberCB * pCallback, + long WhichMethodToCallback) = 0; +}; + + +static const IID IID_ISampleGrabber = { 0x6B652FFF, 0x11FE, 0x4fce,{ 0x92, 0xAD, 0x02, 0x66, 0xB5, 0xD7, 0xC7, 0x8F } }; +static const IID IID_ISampleGrabberCB = { 0x0579154A, 0x2B53, 0x4994,{ 0xB0, 0xD0, 0xE7, 0x73, 0x14, 0x8E, 0xFF, 0x85 } }; +static const CLSID CLSID_SampleGrabber = { 0xC1F400A0, 0x3F08, 0x11d3,{ 0x9F, 0x0B, 0x00, 0x60, 0x08, 0x03, 0x9E, 0x37 } }; +static const CLSID CLSID_NullRenderer = { 0xC1F400A4, 0x3F08, 0x11d3,{ 0x9F, 0x0B, 0x00, 0x60, 0x08, 0x03, 0x9E, 0x37 } }; + +#endif \ No newline at end of file diff --git a/client/qt_gl_/yuvgl/ui_mainwindow.h b/client/qt_gl_/yuvgl/ui_mainwindow.h new file mode 100644 index 0000000..edfe545 --- /dev/null +++ b/client/qt_gl_/yuvgl/ui_mainwindow.h @@ -0,0 +1,161 @@ +/******************************************************************************** +** Form generated from reading UI file 'mainwindow.ui' +** +** Created by: Qt User Interface Compiler version 5.14.0 +** +** WARNING! All changes made in this file will be lost when recompiling UI file! +********************************************************************************/ + +#ifndef UI_MAINWINDOW_H +#define UI_MAINWINDOW_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +QT_BEGIN_NAMESPACE + +class Ui_MainWindow +{ +public: + QWidget *centralWidget; + QGridLayout *gridLayout; + QVBoxLayout *verticalLayout; + QHBoxLayout *horizontalLayout; + QPushButton *pushButton; + QComboBox *comboBox; + QPushButton *pushButton_3; + QComboBox *comboBox_2; + QLabel *label; + QLineEdit *lineEdit; + QPushButton *pushButton_2; + QSpacerItem *horizontalSpacer_2; + QSpacerItem *verticalSpacer; + + void setupUi(QMainWindow *MainWindow) + { + if (MainWindow->objectName().isEmpty()) + MainWindow->setObjectName(QString::fromUtf8("MainWindow")); + MainWindow->resize(1383, 1116); + QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred); + sizePolicy.setHorizontalStretch(0); + sizePolicy.setVerticalStretch(0); + sizePolicy.setHeightForWidth(MainWindow->sizePolicy().hasHeightForWidth()); + MainWindow->setSizePolicy(sizePolicy); + MainWindow->setMinimumSize(QSize(600, 800)); + centralWidget = new QWidget(MainWindow); + centralWidget->setObjectName(QString::fromUtf8("centralWidget")); + QSizePolicy sizePolicy1(QSizePolicy::Expanding, QSizePolicy::Expanding); + sizePolicy1.setHorizontalStretch(0); + sizePolicy1.setVerticalStretch(0); + sizePolicy1.setHeightForWidth(centralWidget->sizePolicy().hasHeightForWidth()); + centralWidget->setSizePolicy(sizePolicy1); + gridLayout = new QGridLayout(centralWidget); + gridLayout->setSpacing(6); + gridLayout->setContentsMargins(11, 11, 11, 11); + gridLayout->setObjectName(QString::fromUtf8("gridLayout")); + verticalLayout = new QVBoxLayout(); + verticalLayout->setSpacing(6); + verticalLayout->setObjectName(QString::fromUtf8("verticalLayout")); + horizontalLayout = new QHBoxLayout(); + horizontalLayout->setSpacing(6); + horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout")); + horizontalLayout->setContentsMargins(2, 2, 2, 1); + pushButton = new QPushButton(centralWidget); + pushButton->setObjectName(QString::fromUtf8("pushButton")); + pushButton->setMinimumSize(QSize(100, 50)); + pushButton->setSizeIncrement(QSize(0, 6)); + pushButton->setBaseSize(QSize(0, 50)); + + horizontalLayout->addWidget(pushButton); + + comboBox = new QComboBox(centralWidget); + comboBox->setObjectName(QString::fromUtf8("comboBox")); + comboBox->setMinimumSize(QSize(200, 35)); + comboBox->setBaseSize(QSize(0, 50)); + + horizontalLayout->addWidget(comboBox); + + pushButton_3 = new QPushButton(centralWidget); + pushButton_3->setObjectName(QString::fromUtf8("pushButton_3")); + pushButton_3->setMinimumSize(QSize(100, 50)); + + horizontalLayout->addWidget(pushButton_3); + + comboBox_2 = new QComboBox(centralWidget); + comboBox_2->setObjectName(QString::fromUtf8("comboBox_2")); + comboBox_2->setMinimumSize(QSize(200, 35)); + + horizontalLayout->addWidget(comboBox_2); + + label = new QLabel(centralWidget); + label->setObjectName(QString::fromUtf8("label")); + + horizontalLayout->addWidget(label); + + lineEdit = new QLineEdit(centralWidget); + lineEdit->setObjectName(QString::fromUtf8("lineEdit")); + lineEdit->setMinimumSize(QSize(300, 30)); + + horizontalLayout->addWidget(lineEdit); + + pushButton_2 = new QPushButton(centralWidget); + pushButton_2->setObjectName(QString::fromUtf8("pushButton_2")); + pushButton_2->setMinimumSize(QSize(60, 50)); + + horizontalLayout->addWidget(pushButton_2); + + horizontalSpacer_2 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum); + + horizontalLayout->addItem(horizontalSpacer_2); + + horizontalLayout->setStretch(0, 1); + horizontalLayout->setStretch(1, 2); + horizontalLayout->setStretch(7, 13); + + verticalLayout->addLayout(horizontalLayout); + + verticalSpacer = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding); + + verticalLayout->addItem(verticalSpacer); + + verticalLayout->setStretch(0, 1); + verticalLayout->setStretch(1, 9); + + gridLayout->addLayout(verticalLayout, 0, 0, 1, 1); + + MainWindow->setCentralWidget(centralWidget); + + retranslateUi(MainWindow); + + QMetaObject::connectSlotsByName(MainWindow); + } // setupUi + + void retranslateUi(QMainWindow *MainWindow) + { + MainWindow->setWindowTitle(QCoreApplication::translate("MainWindow", "MainWindow", nullptr)); + pushButton->setText(QCoreApplication::translate("MainWindow", "\346\211\223\345\274\200\346\221\204\345\203\217\345\244\264", nullptr)); + pushButton_3->setText(QCoreApplication::translate("MainWindow", "\346\211\223\345\274\200\351\272\246\345\205\213\351\243\216", nullptr)); + label->setText(QCoreApplication::translate("MainWindow", "rtmp\346\216\250\346\265\201\345\234\260\345\235\200", nullptr)); + lineEdit->setText(QCoreApplication::translate("MainWindow", "rtmp://127.0.0.1:1935/live/1", nullptr)); + pushButton_2->setText(QCoreApplication::translate("MainWindow", "\346\216\250\346\265\201", nullptr)); + } // retranslateUi + +}; + +namespace Ui { + class MainWindow: public Ui_MainWindow {}; +} // namespace Ui + +QT_END_NAMESPACE + +#endif // UI_MAINWINDOW_H diff --git a/client/qt_gl_/yuvgl/ui_process.h b/client/qt_gl_/yuvgl/ui_process.h new file mode 100644 index 0000000..06347c1 --- /dev/null +++ b/client/qt_gl_/yuvgl/ui_process.h @@ -0,0 +1,63 @@ +/******************************************************************************** +** Form generated from reading UI file 'process.ui' +** +** Created by: Qt User Interface Compiler version 5.14.0 +** +** WARNING! All changes made in this file will be lost when recompiling UI file! +********************************************************************************/ + +#ifndef UI_PROCESS_H +#define UI_PROCESS_H + +#include +#include +#include +#include +#include + +QT_BEGIN_NAMESPACE + +class Ui_Process +{ +public: + QProgressBar *progressBar; + QLabel *label; + + void setupUi(QDialog *Process) + { + if (Process->objectName().isEmpty()) + Process->setObjectName(QString::fromUtf8("Process")); + Process->resize(324, 88); + QSizePolicy sizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); + sizePolicy.setHorizontalStretch(0); + sizePolicy.setVerticalStretch(0); + sizePolicy.setHeightForWidth(Process->sizePolicy().hasHeightForWidth()); + Process->setSizePolicy(sizePolicy); + progressBar = new QProgressBar(Process); + progressBar->setObjectName(QString::fromUtf8("progressBar")); + progressBar->setGeometry(QRect(30, 50, 281, 31)); + progressBar->setValue(24); + label = new QLabel(Process); + label->setObjectName(QString::fromUtf8("label")); + label->setGeometry(QRect(120, 30, 121, 16)); + + retranslateUi(Process); + + QMetaObject::connectSlotsByName(Process); + } // setupUi + + void retranslateUi(QDialog *Process) + { + Process->setWindowTitle(QCoreApplication::translate("Process", "Dialog", nullptr)); + label->setText(QCoreApplication::translate("Process", "\346\255\243\345\234\250\345\212\240\350\275\275\346\225\260\346\215\256", nullptr)); + } // retranslateUi + +}; + +namespace Ui { + class Process: public Ui_Process {}; +} // namespace Ui + +QT_END_NAMESPACE + +#endif // UI_PROCESS_H diff --git a/client/qt_gl_/yuvgl/ui_qsstoast.h b/client/qt_gl_/yuvgl/ui_qsstoast.h new file mode 100644 index 0000000..79a6455 --- /dev/null +++ b/client/qt_gl_/yuvgl/ui_qsstoast.h @@ -0,0 +1,55 @@ +/******************************************************************************** +** Form generated from reading UI file 'qsstoast.ui' +** +** Created by: Qt User Interface Compiler version 5.14.0 +** +** WARNING! All changes made in this file will be lost when recompiling UI file! +********************************************************************************/ + +#ifndef UI_QSSTOAST_H +#define UI_QSSTOAST_H + +#include +#include +#include +#include + +QT_BEGIN_NAMESPACE + +class Ui_Toast +{ +public: + QLabel *label; + + void setupUi(QWidget *Toast) + { + if (Toast->objectName().isEmpty()) + Toast->setObjectName(QString::fromUtf8("Toast")); + Toast->resize(932, 59); + QFont font; + font.setFamily(QString::fromUtf8("Arial")); + Toast->setFont(font); + label = new QLabel(Toast); + label->setObjectName(QString::fromUtf8("label")); + label->setGeometry(QRect(170, 10, 231, 31)); + + retranslateUi(Toast); + + QMetaObject::connectSlotsByName(Toast); + } // setupUi + + void retranslateUi(QWidget *Toast) + { + Toast->setWindowTitle(QCoreApplication::translate("Toast", "Form", nullptr)); + label->setText(QCoreApplication::translate("Toast", "TextLabel", nullptr)); + } // retranslateUi + +}; + +namespace Ui { + class Toast: public Ui_Toast {}; +} // namespace Ui + +QT_END_NAMESPACE + +#endif // UI_QSSTOAST_H diff --git a/client/qt_gl_/yuvgl/ui_toast.h b/client/qt_gl_/yuvgl/ui_toast.h new file mode 100644 index 0000000..4b59238 --- /dev/null +++ b/client/qt_gl_/yuvgl/ui_toast.h @@ -0,0 +1,52 @@ +/******************************************************************************** +** Form generated from reading UI file 'toast.ui' +** +** Created by: Qt User Interface Compiler version 5.14.0 +** +** WARNING! All changes made in this file will be lost when recompiling UI file! +********************************************************************************/ + +#ifndef UI_TOAST_H +#define UI_TOAST_H + +#include +#include +#include +#include + +QT_BEGIN_NAMESPACE + +class Ui_Form +{ +public: + QLabel *label; + + void setupUi(QWidget *Form) + { + if (Form->objectName().isEmpty()) + Form->setObjectName(QString::fromUtf8("Form")); + Form->resize(932, 59); + label = new QLabel(Form); + label->setObjectName(QString::fromUtf8("label")); + label->setGeometry(QRect(170, 10, 231, 31)); + + retranslateUi(Form); + + QMetaObject::connectSlotsByName(Form); + } // setupUi + + void retranslateUi(QWidget *Form) + { + Form->setWindowTitle(QCoreApplication::translate("Form", "Form", nullptr)); + label->setText(QCoreApplication::translate("Form", "TextLabel", nullptr)); + } // retranslateUi + +}; + +namespace Ui { + class Form: public Ui_Form {}; +} // namespace Ui + +QT_END_NAMESPACE + +#endif // UI_TOAST_H diff --git a/client/qt_gl_/yuvgl/yuvgl.pro b/client/qt_gl_/yuvgl/yuvgl.pro index 7dd5606..309db6f 100644 --- a/client/qt_gl_/yuvgl/yuvgl.pro +++ b/client/qt_gl_/yuvgl/yuvgl.pro @@ -42,40 +42,75 @@ SOURCES += \ media/AACAudioCoder.cpp \ media/AudioCapture.cpp \ media/CameraCapture.cpp \ + media/DXGICapture.cpp \ media/RtmpPusher.cpp \ media/VideoCoder.cpp \ media/audiocaptureff.cpp \ + media/screen_capture.cpp \ media/sps_decode.cpp \ utils/Base64.cpp \ utils/Debuger.cpp \ utils/utils.cpp HEADERS += \ components/toast.h \ + librtmp/strncasecmp.h \ mainwindow.h \ cplaywidget.h \ - cplaywidget.h \ - media/audiocaptureff.h + media/screen_capture.h + + FORMS += \ components/toast.ui \ mainwindow.ui -INCLUDEPATH += media/ third/ffmpeg/include/ inc/ third/ + +INCLUDEPATH += media/ contains(DEFINES, __MINGW32__){ - message("sfasdfdsf") - LIBS += -L$$PWD/third/libs/ - LIBS += -lm -lavformat -lavdevice -lavfilter -lavcodec -lavutil -lswresample -lswscale -lpthread -lm -lfdk-aac -lx264 -liconv -lucrtbase -lstrmiids - LIBS += -lole32 -loleAut32 -lquartz -ldxguid -ldxapi -lwinmm -lbcrypt -lssl -lcrypto -lGdi32 -lws2_32 -lbz2 -lz -lportaudio -lshlwapi -lvfw32 -lpostproc -luuid -}else{ - message("111") - LIBS += -L$$PWD/third/libs/ - LIBS += -lm -lavformat -lavdevice -lavfilter -lavcodec -lavutil -lswresample -lswscale -lpthread -lm -lfdk-aac -lx264 -liconv -lucrtbase -lstrmiids - LIBS += -lole32 -loleAut32 -lquartz -ldxguid -ldxapi -lwinmm -lbcrypt -lssl -lcrypto -lGdi32 -lz -lportaudio -lshlwapi -lvfw32 -lpostproc -luuid + message("mingw") + INCLUDEPATH += media/ inc/ + contains(QT_ARCH, i386) { + message("32-bit") + LIBS += -L$$PWD/third/ffmpeg/mingw/32/lib + LIBS += -lm -lavformat -lavdevice -lavfilter -lavcodec -lavutil -lswresample -lswscale -lpthread -lm -lfdk-aac -lx264 -liconv -lucrtbase -lstrmiids + LIBS += -lole32 -loleAut32 -lquartz -ldxguid -ldxapi -lwinmm -lbcrypt -lssl -lcrypto -lGdi32 -lws2_32 -lbz2 -lz -lportaudio -lshlwapi -lvfw32 -lpostproc -luuid + } else { + message("64-bit") + } + }else{ + message("msvc") + + + DEFINES += _CRT_SECURE_NO_DEPRECATE \ + _CRT_NONSTDC_NO_DEPRECATE + + + contains(QT_ARCH, i386) { + INCLUDEPATH += inc $$PWD/third/msvc32/fdk-aac/include \ + $$PWD/third/msvc32/libx264/include \ + $$PWD/third/msvc32/ffmpeg/include \ + $$PWD/third/msvc32/openssl/include + + LIBS += -L$$PWD/third/msvc32/libx264/lib + LIBS += -L$$PWD/third/msvc32/fdk-aac/lib + LIBS += -L$$PWD/third/msvc32/ffmpeg/lib + LIBS += -L$$PWD/third/msvc32/openssl/lib + + LIBS += libavfilter.a libavdevice.a libavcodec.a libpostproc.a \ + libavformat.a libavutil.a \ + libswresample.a libswscale.a fdk-aac.lib ws2_32.lib libeay32.lib ssleay32.lib \ + shell32.lib gdi32.lib crypt32.lib User32.lib GDI32.lib Advapi32.lib zlibstaticd.lib Secur32.lib \ + Bcrypt.lib Kernel32.lib portaudio_x86.lib ole32.lib oleaut32.lib strmiids.lib libx264.lib + + } + else{ + message("64-bit") + + QMAKE_CXXFLAGS_RELEASE += -Zi + QMAKE_LFLAGS_RELEASE += /DEBUG /OPT:REF + } } -QMAKE_CXXFLAGS_RELEASE += -Zi -QMAKE_LFLAGS_RELEASE += /DEBUG /OPT:REF - qnx: target.path = /tmp/$${TARGET}/bin else: unix:!android: target.path = /opt/$${TARGET}/bin !isEmpty(target.path): INSTALLS += target diff --git a/client/qt_gl_/yuvgl/yuvgl.pro.user b/client/qt_gl_/yuvgl/yuvgl.pro.user index af761af..fdd07f0 100644 --- a/client/qt_gl_/yuvgl/yuvgl.pro.user +++ b/client/qt_gl_/yuvgl/yuvgl.pro.user @@ -1,6 +1,6 @@ - + EnvironmentId @@ -71,7 +71,7 @@ 0 0 - D:/project/multimedia/client/qt_gl_/yuvgl + D:/project/multimedia/client/qt_gl_/build-yuvgl-Desktop_Qt_5_14_0_MSVC2017_32bit-Debug true @@ -299,7 +299,7 @@ false true - D:/project/multimedia/client/qt_gl_/yuvgl + D:/project/multimedia/client/qt_gl_/build-yuvgl-Desktop_Qt_5_14_0_MSVC2017_32bit-Debug 1 diff --git a/client/qt_gl_/yuvgl/zlib.h b/client/qt_gl_/yuvgl/zlib.h new file mode 100644 index 0000000..32c2ce0 --- /dev/null +++ b/client/qt_gl_/yuvgl/zlib.h @@ -0,0 +1,1916 @@ +/* zlib.h -- interface of the 'zlib' general purpose compression library + version 1.2.11, January 15th, 2017 + + Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + + Jean-loup Gailly Mark Adler + jloup@gzip.org madler@alumni.caltech.edu + + + The data format used by the zlib library is described by RFCs (Request for + Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950 + (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format). +*/ + +#ifndef ZLIB_H +#define ZLIB_H + +#include "zconf.h" + +#include +#undef ZEXTERN +#define ZEXTERN Q_CORE_EXPORT + +#ifdef __cplusplus +extern "C" { +#endif + +#define ZLIB_VERSION "1.2.11 (Qt)" +#define ZLIB_VERNUM 0x12b0f +#define ZLIB_VER_MAJOR 1 +#define ZLIB_VER_MINOR 2 +#define ZLIB_VER_REVISION 11 +#define ZLIB_VER_SUBREVISION 0 + +/* + The 'zlib' compression library provides in-memory compression and + decompression functions, including integrity checks of the uncompressed data. + This version of the library supports only one compression method (deflation) + but other algorithms will be added later and will have the same stream + interface. + + Compression can be done in a single step if the buffers are large enough, + or can be done by repeated calls of the compression function. In the latter + case, the application must provide more input and/or consume the output + (providing more output space) before each call. + + The compressed data format used by default by the in-memory functions is + the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped + around a deflate stream, which is itself documented in RFC 1951. + + The library also supports reading and writing files in gzip (.gz) format + with an interface similar to that of stdio using the functions that start + with "gz". The gzip format is different from the zlib format. gzip is a + gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. + + This library can optionally read and write gzip and raw deflate streams in + memory as well. + + The zlib format was designed to be compact and fast for use in memory + and on communications channels. The gzip format was designed for single- + file compression on file systems, has a larger header than zlib to maintain + directory information, and uses a different, slower check method than zlib. + + The library does not install any signal handler. The decoder checks + the consistency of the compressed data, so the library should never crash + even in the case of corrupted input. +*/ + +typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); +typedef void (*free_func) OF((voidpf opaque, voidpf address)); + +struct internal_state; + +typedef struct z_stream_s { + z_const Bytef *next_in; /* next input byte */ + uInt avail_in; /* number of bytes available at next_in */ + uLong total_in; /* total number of input bytes read so far */ + + Bytef *next_out; /* next output byte will go here */ + uInt avail_out; /* remaining free space at next_out */ + uLong total_out; /* total number of bytes output so far */ + + z_const char *msg; /* last error message, NULL if no error */ + struct internal_state FAR *state; /* not visible by applications */ + + alloc_func zalloc; /* used to allocate the internal state */ + free_func zfree; /* used to free the internal state */ + voidpf opaque; /* private data object passed to zalloc and zfree */ + + int data_type; /* best guess about the data type: binary or text + for deflate, or the decoding state for inflate */ + uLong adler; /* Adler-32 or CRC-32 value of the uncompressed data */ + uLong reserved; /* reserved for future use */ +} z_stream; + +typedef z_stream FAR *z_streamp; + +/* + gzip header information passed to and from zlib routines. See RFC 1952 + for more details on the meanings of these fields. +*/ +typedef struct gz_header_s { + int text; /* true if compressed data believed to be text */ + uLong time; /* modification time */ + int xflags; /* extra flags (not used when writing a gzip file) */ + int os; /* operating system */ + Bytef *extra; /* pointer to extra field or Z_NULL if none */ + uInt extra_len; /* extra field length (valid if extra != Z_NULL) */ + uInt extra_max; /* space at extra (only when reading header) */ + Bytef *name; /* pointer to zero-terminated file name or Z_NULL */ + uInt name_max; /* space at name (only when reading header) */ + Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */ + uInt comm_max; /* space at comment (only when reading header) */ + int hcrc; /* true if there was or will be a header crc */ + int done; /* true when done reading gzip header (not used + when writing a gzip file) */ +} gz_header; + +typedef gz_header FAR *gz_headerp; + +/* + The application must update next_in and avail_in when avail_in has dropped + to zero. It must update next_out and avail_out when avail_out has dropped + to zero. The application must initialize zalloc, zfree and opaque before + calling the init function. All other fields are set by the compression + library and must not be updated by the application. + + The opaque value provided by the application will be passed as the first + parameter for calls of zalloc and zfree. This can be useful for custom + memory management. The compression library attaches no meaning to the + opaque value. + + zalloc must return Z_NULL if there is not enough memory for the object. + If zlib is used in a multi-threaded application, zalloc and zfree must be + thread safe. In that case, zlib is thread-safe. When zalloc and zfree are + Z_NULL on entry to the initialization function, they are set to internal + routines that use the standard library functions malloc() and free(). + + On 16-bit systems, the functions zalloc and zfree must be able to allocate + exactly 65536 bytes, but will not be required to allocate more than this if + the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers + returned by zalloc for objects of exactly 65536 bytes *must* have their + offset normalized to zero. The default allocation function provided by this + library ensures this (see zutil.c). To reduce memory requirements and avoid + any allocation of 64K objects, at the expense of compression ratio, compile + the library with -DMAX_WBITS=14 (see zconf.h). + + The fields total_in and total_out can be used for statistics or progress + reports. After compression, total_in holds the total size of the + uncompressed data and may be saved for use by the decompressor (particularly + if the decompressor wants to decompress everything in a single step). +*/ + + /* constants */ + +#define Z_NO_FLUSH 0 +#define Z_PARTIAL_FLUSH 1 +#define Z_SYNC_FLUSH 2 +#define Z_FULL_FLUSH 3 +#define Z_FINISH 4 +#define Z_BLOCK 5 +#define Z_TREES 6 +/* Allowed flush values; see deflate() and inflate() below for details */ + +#define Z_OK 0 +#define Z_STREAM_END 1 +#define Z_NEED_DICT 2 +#define Z_ERRNO (-1) +#define Z_STREAM_ERROR (-2) +#define Z_DATA_ERROR (-3) +#define Z_MEM_ERROR (-4) +#define Z_BUF_ERROR (-5) +#define Z_VERSION_ERROR (-6) +/* Return codes for the compression/decompression functions. Negative values + * are errors, positive values are used for special but normal events. + */ + +#define Z_NO_COMPRESSION 0 +#define Z_BEST_SPEED 1 +#define Z_BEST_COMPRESSION 9 +#define Z_DEFAULT_COMPRESSION (-1) +/* compression levels */ + +#define Z_FILTERED 1 +#define Z_HUFFMAN_ONLY 2 +#define Z_RLE 3 +#define Z_FIXED 4 +#define Z_DEFAULT_STRATEGY 0 +/* compression strategy; see deflateInit2() below for details */ + +#define Z_BINARY 0 +#define Z_TEXT 1 +#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */ +#define Z_UNKNOWN 2 +/* Possible values of the data_type field for deflate() */ + +#define Z_DEFLATED 8 +/* The deflate compression method (the only one supported in this version) */ + +#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */ + +#define zlib_version zlibVersion() +/* for compatibility with versions < 1.0.2 */ + + + /* basic functions */ + +ZEXTERN const char * ZEXPORT zlibVersion OF((void)); +/* The application can compare zlibVersion and ZLIB_VERSION for consistency. + If the first character differs, the library code actually used is not + compatible with the zlib.h header file used by the application. This check + is automatically made by deflateInit and inflateInit. + */ + +/* +ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level)); + + Initializes the internal stream state for compression. The fields + zalloc, zfree and opaque must be initialized before by the caller. If + zalloc and zfree are set to Z_NULL, deflateInit updates them to use default + allocation functions. + + The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: + 1 gives best speed, 9 gives best compression, 0 gives no compression at all + (the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION + requests a default compromise between speed and compression (currently + equivalent to level 6). + + deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if level is not a valid compression level, or + Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible + with the version assumed by the caller (ZLIB_VERSION). msg is set to null + if there is no error message. deflateInit does not perform any compression: + this will be done by deflate(). +*/ + + +ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); +/* + deflate compresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. deflate performs one or both of the + following actions: + + - Compress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), next_in and avail_in are updated and + processing will resume at this point for the next call of deflate(). + + - Generate more output starting at next_out and update next_out and avail_out + accordingly. This action is forced if the parameter flush is non zero. + Forcing flush frequently degrades the compression ratio, so this parameter + should be set only when necessary. Some output may be provided even if + flush is zero. + + Before the call of deflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating avail_in or avail_out accordingly; avail_out should + never be zero before the call. The application can consume the compressed + output when it wants, for example when the output buffer is full (avail_out + == 0), or after each call of deflate(). If deflate returns Z_OK and with + zero avail_out, it must be called again after making room in the output + buffer because there might be more output pending. See deflatePending(), + which can be used if desired to determine whether or not there is more ouput + in that case. + + Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to + decide how much data to accumulate before producing output, in order to + maximize compression. + + If the parameter flush is set to Z_SYNC_FLUSH, all pending output is + flushed to the output buffer and the output is aligned on a byte boundary, so + that the decompressor can get all input data available so far. (In + particular avail_in is zero after the call if enough output space has been + provided before the call.) Flushing may degrade compression for some + compression algorithms and so it should be used only when necessary. This + completes the current deflate block and follows it with an empty stored block + that is three bits plus filler bits to the next byte, followed by four bytes + (00 00 ff ff). + + If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the + output buffer, but the output is not aligned to a byte boundary. All of the + input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. + This completes the current deflate block and follows it with an empty fixed + codes block that is 10 bits long. This assures that enough bytes are output + in order for the decompressor to finish the block before the empty fixed + codes block. + + If flush is set to Z_BLOCK, a deflate block is completed and emitted, as + for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to + seven bits of the current block are held to be written as the next byte after + the next deflate block is completed. In this case, the decompressor may not + be provided enough bits at this point in order to complete decompression of + the data provided so far to the compressor. It may need to wait for the next + block to be emitted. This is for advanced applications that need to control + the emission of deflate blocks. + + If flush is set to Z_FULL_FLUSH, all output is flushed as with + Z_SYNC_FLUSH, and the compression state is reset so that decompression can + restart from this point if previous compressed data has been damaged or if + random access is desired. Using Z_FULL_FLUSH too often can seriously degrade + compression. + + If deflate returns with avail_out == 0, this function must be called again + with the same value of the flush parameter and more output space (updated + avail_out), until the flush is complete (deflate returns with non-zero + avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that + avail_out is greater than six to avoid repeated flush markers due to + avail_out == 0 on return. + + If the parameter flush is set to Z_FINISH, pending input is processed, + pending output is flushed and deflate returns with Z_STREAM_END if there was + enough output space. If deflate returns with Z_OK or Z_BUF_ERROR, this + function must be called again with Z_FINISH and more output space (updated + avail_out) but no more input data, until it returns with Z_STREAM_END or an + error. After deflate has returned Z_STREAM_END, the only possible operations + on the stream are deflateReset or deflateEnd. + + Z_FINISH can be used in the first deflate call after deflateInit if all the + compression is to be done in a single step. In order to complete in one + call, avail_out must be at least the value returned by deflateBound (see + below). Then deflate is guaranteed to return Z_STREAM_END. If not enough + output space is provided, deflate will not return Z_STREAM_END, and it must + be called again as described above. + + deflate() sets strm->adler to the Adler-32 checksum of all input read + so far (that is, total_in bytes). If a gzip stream is being generated, then + strm->adler will be the CRC-32 checksum of the input read so far. (See + deflateInit2 below.) + + deflate() may update strm->data_type if it can make a good guess about + the input data type (Z_BINARY or Z_TEXT). If in doubt, the data is + considered binary. This field is only for information purposes and does not + affect the compression algorithm in any manner. + + deflate() returns Z_OK if some progress has been made (more input + processed or more output produced), Z_STREAM_END if all input has been + consumed and all output has been produced (only when flush is set to + Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example + if next_in or next_out was Z_NULL or the state was inadvertently written over + by the application), or Z_BUF_ERROR if no progress is possible (for example + avail_in or avail_out was zero). Note that Z_BUF_ERROR is not fatal, and + deflate() can be called again with more input and more output space to + continue compressing. +*/ + + +ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the + stream state was inconsistent, Z_DATA_ERROR if the stream was freed + prematurely (some input or output was discarded). In the error case, msg + may be set but then points to a static string (which must not be + deallocated). +*/ + + +/* +ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); + + Initializes the internal stream state for decompression. The fields + next_in, avail_in, zalloc, zfree and opaque must be initialized before by + the caller. In the current version of inflate, the provided input is not + read or consumed. The allocation of a sliding window will be deferred to + the first call of inflate (if the decompression does not complete on the + first call). If zalloc and zfree are set to Z_NULL, inflateInit updates + them to use default allocation functions. + + inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit does not perform any decompression. + Actual decompression will be done by inflate(). So next_in, and avail_in, + next_out, and avail_out are unused and unchanged. The current + implementation of inflateInit() does not process any header information -- + that is deferred until inflate() is called. +*/ + + +ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); +/* + inflate decompresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. inflate performs one or both of the + following actions: + + - Decompress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), then next_in and avail_in are updated + accordingly, and processing will resume at this point for the next call of + inflate(). + + - Generate more output starting at next_out and update next_out and avail_out + accordingly. inflate() provides as much output as possible, until there is + no more input data or no more space in the output buffer (see below about + the flush parameter). + + Before the call of inflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating the next_* and avail_* values accordingly. If the + caller of inflate() does not provide both available input and available + output space, it is possible that there will be no progress made. The + application can consume the uncompressed output when it wants, for example + when the output buffer is full (avail_out == 0), or after each call of + inflate(). If inflate returns Z_OK and with zero avail_out, it must be + called again after making room in the output buffer because there might be + more output pending. + + The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH, + Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much + output as possible to the output buffer. Z_BLOCK requests that inflate() + stop if and when it gets to the next deflate block boundary. When decoding + the zlib or gzip format, this will cause inflate() to return immediately + after the header and before the first block. When doing a raw inflate, + inflate() will go ahead and process the first block, and will return when it + gets to the end of that block, or when it runs out of data. + + The Z_BLOCK option assists in appending to or combining deflate streams. + To assist in this, on return inflate() always sets strm->data_type to the + number of unused bits in the last byte taken from strm->next_in, plus 64 if + inflate() is currently decoding the last block in the deflate stream, plus + 128 if inflate() returned immediately after decoding an end-of-block code or + decoding the complete header up to just before the first byte of the deflate + stream. The end-of-block will not be indicated until all of the uncompressed + data from that block has been written to strm->next_out. The number of + unused bits may in general be greater than seven, except when bit 7 of + data_type is set, in which case the number of unused bits will be less than + eight. data_type is set as noted here every time inflate() returns for all + flush options, and so can be used to determine the amount of currently + consumed input in bits. + + The Z_TREES option behaves as Z_BLOCK does, but it also returns when the + end of each deflate block header is reached, before any actual data in that + block is decoded. This allows the caller to determine the length of the + deflate block header for later use in random access within a deflate block. + 256 is added to the value of strm->data_type when inflate() returns + immediately after reaching the end of the deflate block header. + + inflate() should normally be called until it returns Z_STREAM_END or an + error. However if all decompression is to be performed in a single step (a + single call of inflate), the parameter flush should be set to Z_FINISH. In + this case all pending input is processed and all pending output is flushed; + avail_out must be large enough to hold all of the uncompressed data for the + operation to complete. (The size of the uncompressed data may have been + saved by the compressor for this purpose.) The use of Z_FINISH is not + required to perform an inflation in one step. However it may be used to + inform inflate that a faster approach can be used for the single inflate() + call. Z_FINISH also informs inflate to not maintain a sliding window if the + stream completes, which reduces inflate's memory footprint. If the stream + does not complete, either because not all of the stream is provided or not + enough output space is provided, then a sliding window will be allocated and + inflate() can be called again to continue the operation as if Z_NO_FLUSH had + been used. + + In this implementation, inflate() always flushes as much output as + possible to the output buffer, and always uses the faster approach on the + first call. So the effects of the flush parameter in this implementation are + on the return value of inflate() as noted below, when inflate() returns early + when Z_BLOCK or Z_TREES is used, and when inflate() avoids the allocation of + memory for a sliding window when Z_FINISH is used. + + If a preset dictionary is needed after this call (see inflateSetDictionary + below), inflate sets strm->adler to the Adler-32 checksum of the dictionary + chosen by the compressor and returns Z_NEED_DICT; otherwise it sets + strm->adler to the Adler-32 checksum of all output produced so far (that is, + total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described + below. At the end of the stream, inflate() checks that its computed Adler-32 + checksum is equal to that saved by the compressor and returns Z_STREAM_END + only if the checksum is correct. + + inflate() can decompress and check either zlib-wrapped or gzip-wrapped + deflate data. The header type is detected automatically, if requested when + initializing with inflateInit2(). Any information contained in the gzip + header is not retained unless inflateGetHeader() is used. When processing + gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output + produced so far. The CRC-32 is checked against the gzip trailer, as is the + uncompressed length, modulo 2^32. + + inflate() returns Z_OK if some progress has been made (more input processed + or more output produced), Z_STREAM_END if the end of the compressed data has + been reached and all uncompressed output has been produced, Z_NEED_DICT if a + preset dictionary is needed at this point, Z_DATA_ERROR if the input data was + corrupted (input stream not conforming to the zlib format or incorrect check + value, in which case strm->msg points to a string with a more specific + error), Z_STREAM_ERROR if the stream structure was inconsistent (for example + next_in or next_out was Z_NULL, or the state was inadvertently written over + by the application), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR + if no progress was possible or if there was not enough room in the output + buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and + inflate() can be called again with more input and more output space to + continue decompressing. If Z_DATA_ERROR is returned, the application may + then call inflateSync() to look for a good compression block if a partial + recovery of the data is to be attempted. +*/ + + +ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + inflateEnd returns Z_OK if success, or Z_STREAM_ERROR if the stream state + was inconsistent. +*/ + + + /* Advanced functions */ + +/* + The following functions are needed only in some special applications. +*/ + +/* +ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, + int level, + int method, + int windowBits, + int memLevel, + int strategy)); + + This is another version of deflateInit with more compression options. The + fields next_in, zalloc, zfree and opaque must be initialized before by the + caller. + + The method parameter is the compression method. It must be Z_DEFLATED in + this version of the library. + + The windowBits parameter is the base two logarithm of the window size + (the size of the history buffer). It should be in the range 8..15 for this + version of the library. Larger values of this parameter result in better + compression at the expense of memory usage. The default value is 15 if + deflateInit is used instead. + + For the current implementation of deflate(), a windowBits value of 8 (a + window size of 256 bytes) is not supported. As a result, a request for 8 + will result in 9 (a 512-byte window). In that case, providing 8 to + inflateInit2() will result in an error when the zlib header with 9 is + checked against the initialization of inflate(). The remedy is to not use 8 + with deflateInit2() with this initialization, or at least in that case use 9 + with inflateInit2(). + + windowBits can also be -8..-15 for raw deflate. In this case, -windowBits + determines the window size. deflate() will then generate raw deflate data + with no zlib header or trailer, and will not compute a check value. + + windowBits can also be greater than 15 for optional gzip encoding. Add + 16 to windowBits to write a simple gzip header and trailer around the + compressed data instead of a zlib wrapper. The gzip header will have no + file name, no extra data, no comment, no modification time (set to zero), no + header crc, and the operating system will be set to the appropriate value, + if the operating system was determined at compile time. If a gzip stream is + being written, strm->adler is a CRC-32 instead of an Adler-32. + + For raw deflate or gzip encoding, a request for a 256-byte window is + rejected as invalid, since only the zlib header provides a means of + transmitting the window size to the decompressor. + + The memLevel parameter specifies how much memory should be allocated + for the internal compression state. memLevel=1 uses minimum memory but is + slow and reduces compression ratio; memLevel=9 uses maximum memory for + optimal speed. The default value is 8. See zconf.h for total memory usage + as a function of windowBits and memLevel. + + The strategy parameter is used to tune the compression algorithm. Use the + value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a + filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no + string match), or Z_RLE to limit match distances to one (run-length + encoding). Filtered data consists mostly of small values with a somewhat + random distribution. In this case, the compression algorithm is tuned to + compress them better. The effect of Z_FILTERED is to force more Huffman + coding and less string matching; it is somewhat intermediate between + Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as + fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The + strategy parameter only affects the compression ratio but not the + correctness of the compressed output even if it is not set appropriately. + Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler + decoder for special applications. + + deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid + method), or Z_VERSION_ERROR if the zlib library version (zlib_version) is + incompatible with the version assumed by the caller (ZLIB_VERSION). msg is + set to null if there is no error message. deflateInit2 does not perform any + compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the compression dictionary from the given byte sequence + without producing any compressed output. When using the zlib format, this + function must be called immediately after deflateInit, deflateInit2 or + deflateReset, and before any call of deflate. When doing raw deflate, this + function must be called either before any call of deflate, or immediately + after the completion of a deflate block, i.e. after all input has been + consumed and all output has been delivered when using any of the flush + options Z_BLOCK, Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, or Z_FULL_FLUSH. The + compressor and decompressor must use exactly the same dictionary (see + inflateSetDictionary). + + The dictionary should consist of strings (byte sequences) that are likely + to be encountered later in the data to be compressed, with the most commonly + used strings preferably put towards the end of the dictionary. Using a + dictionary is most useful when the data to be compressed is short and can be + predicted with good accuracy; the data can then be compressed better than + with the default empty dictionary. + + Depending on the size of the compression data structures selected by + deflateInit or deflateInit2, a part of the dictionary may in effect be + discarded, for example if the dictionary is larger than the window size + provided in deflateInit or deflateInit2. Thus the strings most likely to be + useful should be put at the end of the dictionary, not at the front. In + addition, the current implementation of deflate will use at most the window + size minus 262 bytes of the provided dictionary. + + Upon return of this function, strm->adler is set to the Adler-32 value + of the dictionary; the decompressor may later use this value to determine + which dictionary has been used by the compressor. (The Adler-32 value + applies to the whole dictionary even if only a subset of the dictionary is + actually used by the compressor.) If a raw deflate was requested, then the + Adler-32 value is not computed and strm->adler is not set. + + deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent (for example if deflate has already been called for this stream + or if not at a block boundary for raw deflate). deflateSetDictionary does + not perform any compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateGetDictionary OF((z_streamp strm, + Bytef *dictionary, + uInt *dictLength)); +/* + Returns the sliding dictionary being maintained by deflate. dictLength is + set to the number of bytes in the dictionary, and that many bytes are copied + to dictionary. dictionary must have enough space, where 32768 bytes is + always enough. If deflateGetDictionary() is called with dictionary equal to + Z_NULL, then only the dictionary length is returned, and nothing is copied. + Similary, if dictLength is Z_NULL, then it is not set. + + deflateGetDictionary() may return a length less than the window size, even + when more than the window size in input has been provided. It may return up + to 258 bytes less in that case, due to how zlib's implementation of deflate + manages the sliding window and lookahead for matches, where matches can be + up to 258 bytes long. If the application needs the last window-size bytes of + input, then that would need to be saved by the application outside of zlib. + + deflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the + stream state is inconsistent. +*/ + +ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when several compression strategies will be + tried, for example when there are several ways of pre-processing the input + data with a filter. The streams that will be discarded should then be freed + by calling deflateEnd. Note that deflateCopy duplicates the internal + compression state which can be quite large, so this strategy is slow and can + consume lots of memory. + + deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); +/* + This function is equivalent to deflateEnd followed by deflateInit, but + does not free and reallocate the internal compression state. The stream + will leave the compression level and any other attributes that may have been + set unchanged. + + deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, + int level, + int strategy)); +/* + Dynamically update the compression level and compression strategy. The + interpretation of level and strategy is as in deflateInit2(). This can be + used to switch between compression and straight copy of the input data, or + to switch to a different kind of input data requiring a different strategy. + If the compression approach (which is a function of the level) or the + strategy is changed, and if any input has been consumed in a previous + deflate() call, then the input available so far is compressed with the old + level and strategy using deflate(strm, Z_BLOCK). There are three approaches + for the compression levels 0, 1..3, and 4..9 respectively. The new level + and strategy will take effect at the next call of deflate(). + + If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does + not have enough output space to complete, then the parameter change will not + take effect. In this case, deflateParams() can be called again with the + same parameters and more output space to try again. + + In order to assure a change in the parameters on the first try, the + deflate stream should be flushed using deflate() with Z_BLOCK or other flush + request until strm.avail_out is not zero, before calling deflateParams(). + Then no more input data should be provided before the deflateParams() call. + If this is done, the old level and strategy will be applied to the data + compressed before deflateParams(), and the new level and strategy will be + applied to the the data compressed after deflateParams(). + + deflateParams returns Z_OK on success, Z_STREAM_ERROR if the source stream + state was inconsistent or if a parameter was invalid, or Z_BUF_ERROR if + there was not enough output space to complete the compression of the + available input data before a change in the strategy or approach. Note that + in the case of a Z_BUF_ERROR, the parameters are not changed. A return + value of Z_BUF_ERROR is not fatal, in which case deflateParams() can be + retried with more output space. +*/ + +ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, + int good_length, + int max_lazy, + int nice_length, + int max_chain)); +/* + Fine tune deflate's internal compression parameters. This should only be + used by someone who understands the algorithm used by zlib's deflate for + searching for the best matching string, and even then only by the most + fanatic optimizer trying to squeeze out the last compressed bit for their + specific input data. Read the deflate.c source code for the meaning of the + max_lazy, good_length, nice_length, and max_chain parameters. + + deflateTune() can be called after deflateInit() or deflateInit2(), and + returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream. + */ + +ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm, + uLong sourceLen)); +/* + deflateBound() returns an upper bound on the compressed size after + deflation of sourceLen bytes. It must be called after deflateInit() or + deflateInit2(), and after deflateSetHeader(), if used. This would be used + to allocate an output buffer for deflation in a single pass, and so would be + called before deflate(). If that first deflate() call is provided the + sourceLen input bytes, an output buffer allocated to the size returned by + deflateBound(), and the flush value Z_FINISH, then deflate() is guaranteed + to return Z_STREAM_END. Note that it is possible for the compressed size to + be larger than the value returned by deflateBound() if flush options other + than Z_FINISH or Z_NO_FLUSH are used. +*/ + +ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm, + unsigned *pending, + int *bits)); +/* + deflatePending() returns the number of bytes and bits of output that have + been generated, but not yet provided in the available output. The bytes not + provided would be due to the available output space having being consumed. + The number of bits of output not provided are between 0 and 7, where they + await more bits to join them in order to fill out a full byte. If pending + or bits are Z_NULL, then those values are not set. + + deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. + */ + +ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + deflatePrime() inserts bits in the deflate output stream. The intent + is that this function is used to start off the deflate output with the bits + leftover from a previous deflate stream when appending to it. As such, this + function can only be used for raw deflate, and must be used before the first + deflate() call after a deflateInit2() or deflateReset(). bits must be less + than or equal to 16, and that many of the least significant bits of value + will be inserted in the output. + + deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough + room in the internal buffer to insert the bits, or Z_STREAM_ERROR if the + source stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, + gz_headerp head)); +/* + deflateSetHeader() provides gzip header information for when a gzip + stream is requested by deflateInit2(). deflateSetHeader() may be called + after deflateInit2() or deflateReset() and before the first call of + deflate(). The text, time, os, extra field, name, and comment information + in the provided gz_header structure are written to the gzip header (xflag is + ignored -- the extra flags are set according to the compression level). The + caller must assure that, if not Z_NULL, name and comment are terminated with + a zero byte, and that if extra is not Z_NULL, that extra_len bytes are + available there. If hcrc is true, a gzip header crc is included. Note that + the current versions of the command-line version of gzip (up through version + 1.3.x) do not support header crc's, and will report that it is a "multi-part + gzip file" and give up. + + If deflateSetHeader is not used, the default gzip header has text false, + the time set to zero, and os set to 255, with no extra, name, or comment + fields. The gzip header is returned to the default state by deflateReset(). + + deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, + int windowBits)); + + This is another version of inflateInit with an extra parameter. The + fields next_in, avail_in, zalloc, zfree and opaque must be initialized + before by the caller. + + The windowBits parameter is the base two logarithm of the maximum window + size (the size of the history buffer). It should be in the range 8..15 for + this version of the library. The default value is 15 if inflateInit is used + instead. windowBits must be greater than or equal to the windowBits value + provided to deflateInit2() while compressing, or it must be equal to 15 if + deflateInit2() was not used. If a compressed stream with a larger window + size is given as input, inflate() will return with the error code + Z_DATA_ERROR instead of trying to allocate a larger window. + + windowBits can also be zero to request that inflate use the window size in + the zlib header of the compressed stream. + + windowBits can also be -8..-15 for raw inflate. In this case, -windowBits + determines the window size. inflate() will then process raw deflate data, + not looking for a zlib or gzip header, not generating a check value, and not + looking for any check values for comparison at the end of the stream. This + is for use with other formats that use the deflate compressed data format + such as zip. Those formats provide their own check values. If a custom + format is developed using the raw deflate format for compressed data, it is + recommended that a check value such as an Adler-32 or a CRC-32 be applied to + the uncompressed data as is done in the zlib, gzip, and zip formats. For + most applications, the zlib format should be used as is. Note that comments + above on the use in deflateInit2() applies to the magnitude of windowBits. + + windowBits can also be greater than 15 for optional gzip decoding. Add + 32 to windowBits to enable zlib and gzip decoding with automatic header + detection, or add 16 to decode only the gzip format (the zlib format will + return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a + CRC-32 instead of an Adler-32. Unlike the gunzip utility and gzread() (see + below), inflate() will not automatically decode concatenated gzip streams. + inflate() will return Z_STREAM_END at the end of the gzip stream. The state + would need to be reset to continue decoding a subsequent gzip stream. + + inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit2 does not perform any decompression + apart from possibly reading the zlib header if present: actual decompression + will be done by inflate(). (So next_in and avail_in may be modified, but + next_out and avail_out are unused and unchanged.) The current implementation + of inflateInit2() does not process any header information -- that is + deferred until inflate() is called. +*/ + +ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the decompression dictionary from the given uncompressed byte + sequence. This function must be called immediately after a call of inflate, + if that call returned Z_NEED_DICT. The dictionary chosen by the compressor + can be determined from the Adler-32 value returned by that call of inflate. + The compressor and decompressor must use exactly the same dictionary (see + deflateSetDictionary). For raw inflate, this function can be called at any + time to set the dictionary. If the provided dictionary is smaller than the + window and there is already data in the window, then the provided dictionary + will amend what's there. The application must insure that the dictionary + that was used for compression is provided. + + inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the + expected one (incorrect Adler-32 value). inflateSetDictionary does not + perform any decompression: this will be done by subsequent calls of + inflate(). +*/ + +ZEXTERN int ZEXPORT inflateGetDictionary OF((z_streamp strm, + Bytef *dictionary, + uInt *dictLength)); +/* + Returns the sliding dictionary being maintained by inflate. dictLength is + set to the number of bytes in the dictionary, and that many bytes are copied + to dictionary. dictionary must have enough space, where 32768 bytes is + always enough. If inflateGetDictionary() is called with dictionary equal to + Z_NULL, then only the dictionary length is returned, and nothing is copied. + Similary, if dictLength is Z_NULL, then it is not set. + + inflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the + stream state is inconsistent. +*/ + +ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); +/* + Skips invalid compressed data until a possible full flush point (see above + for the description of deflate with Z_FULL_FLUSH) can be found, or until all + available input is skipped. No output is provided. + + inflateSync searches for a 00 00 FF FF pattern in the compressed data. + All full flush points have this pattern, but not all occurrences of this + pattern are full flush points. + + inflateSync returns Z_OK if a possible full flush point has been found, + Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point + has been found, or Z_STREAM_ERROR if the stream structure was inconsistent. + In the success case, the application may save the current current value of + total_in which indicates where valid compressed data was found. In the + error case, the application may repeatedly call inflateSync, providing more + input each time, until success or end of the input data. +*/ + +ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when randomly accessing a large stream. The + first pass through the stream can periodically record the inflate state, + allowing restarting inflate at those points when randomly accessing the + stream. + + inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); +/* + This function is equivalent to inflateEnd followed by inflateInit, + but does not free and reallocate the internal decompression state. The + stream will keep attributes that may have been set by inflateInit2. + + inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, + int windowBits)); +/* + This function is the same as inflateReset, but it also permits changing + the wrap and window size requests. The windowBits parameter is interpreted + the same as it is for inflateInit2. If the window size is changed, then the + memory allocated for the window is freed, and the window will be reallocated + by inflate() if needed. + + inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL), or if + the windowBits parameter is invalid. +*/ + +ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + This function inserts bits in the inflate input stream. The intent is + that this function is used to start inflating at a bit position in the + middle of a byte. The provided bits will be used before any bytes are used + from next_in. This function should only be used with raw inflate, and + should be used before the first inflate() call after inflateInit2() or + inflateReset(). bits must be less than or equal to 16, and that many of the + least significant bits of value will be inserted in the input. + + If bits is negative, then the input stream bit buffer is emptied. Then + inflatePrime() can be called again to put bits in the buffer. This is used + to clear out bits leftover after feeding inflate a block description prior + to feeding inflate codes. + + inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm)); +/* + This function returns two values, one in the lower 16 bits of the return + value, and the other in the remaining upper bits, obtained by shifting the + return value down 16 bits. If the upper value is -1 and the lower value is + zero, then inflate() is currently decoding information outside of a block. + If the upper value is -1 and the lower value is non-zero, then inflate is in + the middle of a stored block, with the lower value equaling the number of + bytes from the input remaining to copy. If the upper value is not -1, then + it is the number of bits back from the current bit position in the input of + the code (literal or length/distance pair) currently being processed. In + that case the lower value is the number of bytes already emitted for that + code. + + A code is being processed if inflate is waiting for more input to complete + decoding of the code, or if it has completed decoding but is waiting for + more output space to write the literal or match data. + + inflateMark() is used to mark locations in the input data for random + access, which may be at bit positions, and to note those cases where the + output of a code may span boundaries of random access blocks. The current + location in the input stream can be determined from avail_in and data_type + as noted in the description for the Z_BLOCK flush parameter for inflate. + + inflateMark returns the value noted above, or -65536 if the provided + source stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm, + gz_headerp head)); +/* + inflateGetHeader() requests that gzip header information be stored in the + provided gz_header structure. inflateGetHeader() may be called after + inflateInit2() or inflateReset(), and before the first call of inflate(). + As inflate() processes the gzip stream, head->done is zero until the header + is completed, at which time head->done is set to one. If a zlib stream is + being decoded, then head->done is set to -1 to indicate that there will be + no gzip header information forthcoming. Note that Z_BLOCK or Z_TREES can be + used to force inflate() to return immediately after header processing is + complete and before any actual data is decompressed. + + The text, time, xflags, and os fields are filled in with the gzip header + contents. hcrc is set to true if there is a header CRC. (The header CRC + was valid if done is set to one.) If extra is not Z_NULL, then extra_max + contains the maximum number of bytes to write to extra. Once done is true, + extra_len contains the actual extra field length, and extra contains the + extra field, or that field truncated if extra_max is less than extra_len. + If name is not Z_NULL, then up to name_max characters are written there, + terminated with a zero unless the length is greater than name_max. If + comment is not Z_NULL, then up to comm_max characters are written there, + terminated with a zero unless the length is greater than comm_max. When any + of extra, name, or comment are not Z_NULL and the respective field is not + present in the header, then that field is set to Z_NULL to signal its + absence. This allows the use of deflateSetHeader() with the returned + structure to duplicate the header. However if those fields are set to + allocated memory, then the application will need to save those pointers + elsewhere so that they can be eventually freed. + + If inflateGetHeader is not used, then the header information is simply + discarded. The header is always checked for validity, including the header + CRC if present. inflateReset() will reset the process to discard the header + information. The application would need to call inflateGetHeader() again to + retrieve the header from the next gzip stream. + + inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits, + unsigned char FAR *window)); + + Initialize the internal stream state for decompression using inflateBack() + calls. The fields zalloc, zfree and opaque in strm must be initialized + before the call. If zalloc and zfree are Z_NULL, then the default library- + derived memory allocation routines are used. windowBits is the base two + logarithm of the window size, in the range 8..15. window is a caller + supplied buffer of that size. Except for special applications where it is + assured that deflate was used with small window sizes, windowBits must be 15 + and a 32K byte window must be supplied to be able to decompress general + deflate streams. + + See inflateBack() for the usage of these routines. + + inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of + the parameters are invalid, Z_MEM_ERROR if the internal state could not be + allocated, or Z_VERSION_ERROR if the version of the library does not match + the version of the header file. +*/ + +typedef unsigned (*in_func) OF((void FAR *, + z_const unsigned char FAR * FAR *)); +typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned)); + +ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, + in_func in, void FAR *in_desc, + out_func out, void FAR *out_desc)); +/* + inflateBack() does a raw inflate with a single call using a call-back + interface for input and output. This is potentially more efficient than + inflate() for file i/o applications, in that it avoids copying between the + output and the sliding window by simply making the window itself the output + buffer. inflate() can be faster on modern CPUs when used with large + buffers. inflateBack() trusts the application to not change the output + buffer passed by the output function, at least until inflateBack() returns. + + inflateBackInit() must be called first to allocate the internal state + and to initialize the state with the user-provided window buffer. + inflateBack() may then be used multiple times to inflate a complete, raw + deflate stream with each call. inflateBackEnd() is then called to free the + allocated state. + + A raw deflate stream is one with no zlib or gzip header or trailer. + This routine would normally be used in a utility that reads zip or gzip + files and writes out uncompressed files. The utility would decode the + header and process the trailer on its own, hence this routine expects only + the raw deflate stream to decompress. This is different from the default + behavior of inflate(), which expects a zlib header and trailer around the + deflate stream. + + inflateBack() uses two subroutines supplied by the caller that are then + called by inflateBack() for input and output. inflateBack() calls those + routines until it reads a complete deflate stream and writes out all of the + uncompressed data, or until it encounters an error. The function's + parameters and return types are defined above in the in_func and out_func + typedefs. inflateBack() will call in(in_desc, &buf) which should return the + number of bytes of provided input, and a pointer to that input in buf. If + there is no input available, in() must return zero -- buf is ignored in that + case -- and inflateBack() will return a buffer error. inflateBack() will + call out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. + out() should return zero on success, or non-zero on failure. If out() + returns non-zero, inflateBack() will return with an error. Neither in() nor + out() are permitted to change the contents of the window provided to + inflateBackInit(), which is also the buffer that out() uses to write from. + The length written by out() will be at most the window size. Any non-zero + amount of input may be provided by in(). + + For convenience, inflateBack() can be provided input on the first call by + setting strm->next_in and strm->avail_in. If that input is exhausted, then + in() will be called. Therefore strm->next_in must be initialized before + calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called + immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in + must also be initialized, and then if strm->avail_in is not zero, input will + initially be taken from strm->next_in[0 .. strm->avail_in - 1]. + + The in_desc and out_desc parameters of inflateBack() is passed as the + first parameter of in() and out() respectively when they are called. These + descriptors can be optionally used to pass any information that the caller- + supplied in() and out() functions need to do their job. + + On return, inflateBack() will set strm->next_in and strm->avail_in to + pass back any unused input that was provided by the last in() call. The + return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR + if in() or out() returned an error, Z_DATA_ERROR if there was a format error + in the deflate stream (in which case strm->msg is set to indicate the nature + of the error), or Z_STREAM_ERROR if the stream was not properly initialized. + In the case of Z_BUF_ERROR, an input or output error can be distinguished + using strm->next_in which will be Z_NULL only if in() returned an error. If + strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning + non-zero. (in() will always be called before out(), so strm->next_in is + assured to be defined if out() returns non-zero.) Note that inflateBack() + cannot return Z_OK. +*/ + +ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm)); +/* + All memory allocated by inflateBackInit() is freed. + + inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream + state was inconsistent. +*/ + +ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void)); +/* Return flags indicating compile-time options. + + Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other: + 1.0: size of uInt + 3.2: size of uLong + 5.4: size of voidpf (pointer) + 7.6: size of z_off_t + + Compiler, assembler, and debug options: + 8: ZLIB_DEBUG + 9: ASMV or ASMINF -- use ASM code + 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention + 11: 0 (reserved) + + One-time table building (smaller code, but not thread-safe if true): + 12: BUILDFIXED -- build static block decoding tables when needed + 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed + 14,15: 0 (reserved) + + Library content (indicates missing functionality): + 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking + deflate code when not needed) + 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect + and decode gzip streams (to avoid linking crc code) + 18-19: 0 (reserved) + + Operation variations (changes in library functionality): + 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate + 21: FASTEST -- deflate algorithm with only one, lowest compression level + 22,23: 0 (reserved) + + The sprintf variant used by gzprintf (zero is best): + 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format + 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure! + 26: 0 = returns value, 1 = void -- 1 means inferred string length returned + + Remainder: + 27-31: 0 (reserved) + */ + +#ifndef Z_SOLO + + /* utility functions */ + +/* + The following utility functions are implemented on top of the basic + stream-oriented functions. To simplify the interface, some default options + are assumed (compression level and memory usage, standard memory allocation + functions). The source code of these utility functions can be modified if + you need special options. +*/ + +ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Compresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed data. compress() is equivalent to compress2() with a level + parameter of Z_DEFAULT_COMPRESSION. + + compress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer. +*/ + +ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen, + int level)); +/* + Compresses the source buffer into the destination buffer. The level + parameter has the same meaning as in deflateInit. sourceLen is the byte + length of the source buffer. Upon entry, destLen is the total size of the + destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed data. + + compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_BUF_ERROR if there was not enough room in the output buffer, + Z_STREAM_ERROR if the level parameter is invalid. +*/ + +ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen)); +/* + compressBound() returns an upper bound on the compressed size after + compress() or compress2() on sourceLen bytes. It would be used before a + compress() or compress2() call to allocate the destination buffer. +*/ + +ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Decompresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be large enough to hold the entire + uncompressed data. (The size of the uncompressed data must have been saved + previously by the compressor and transmitted to the decompressor by some + mechanism outside the scope of this compression library.) Upon exit, destLen + is the actual size of the uncompressed data. + + uncompress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. In + the case where there is not enough room, uncompress() will fill the output + buffer with the uncompressed data up to that point. +*/ + +ZEXTERN int ZEXPORT uncompress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong *sourceLen)); +/* + Same as uncompress, except that sourceLen is a pointer, where the + length of the source is *sourceLen. On return, *sourceLen is the number of + source bytes consumed. +*/ + + /* gzip file access functions */ + +/* + This library supports reading and writing files in gzip (.gz) format with + an interface similar to that of stdio, using the functions that start with + "gz". The gzip format is different from the zlib format. gzip is a gzip + wrapper, documented in RFC 1952, wrapped around a deflate stream. +*/ + +typedef struct gzFile_s *gzFile; /* semi-opaque gzip file descriptor */ + +/* +ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); + + Opens a gzip (.gz) file for reading or writing. The mode parameter is as + in fopen ("rb" or "wb") but can also include a compression level ("wb9") or + a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only + compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F' + for fixed code compression as in "wb9F". (See the description of + deflateInit2 for more information about the strategy parameter.) 'T' will + request transparent writing or appending with no compression and not using + the gzip format. + + "a" can be used instead of "w" to request that the gzip stream that will + be written be appended to the file. "+" will result in an error, since + reading and writing to the same gzip file is not supported. The addition of + "x" when writing will create the file exclusively, which fails if the file + already exists. On systems that support it, the addition of "e" when + reading or writing will set the flag to close the file on an execve() call. + + These functions, as well as gzip, will read and decode a sequence of gzip + streams in a file. The append function of gzopen() can be used to create + such a file. (Also see gzflush() for another way to do this.) When + appending, gzopen does not test whether the file begins with a gzip stream, + nor does it look for the end of the gzip streams to begin appending. gzopen + will simply append a gzip stream to the existing file. + + gzopen can be used to read a file which is not in gzip format; in this + case gzread will directly read from the file without decompression. When + reading, this will be detected automatically by looking for the magic two- + byte gzip header. + + gzopen returns NULL if the file could not be opened, if there was + insufficient memory to allocate the gzFile state, or if an invalid mode was + specified (an 'r', 'w', or 'a' was not provided, or '+' was provided). + errno can be checked to determine if the reason gzopen failed was that the + file could not be opened. +*/ + +ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode)); +/* + gzdopen associates a gzFile with the file descriptor fd. File descriptors + are obtained from calls like open, dup, creat, pipe or fileno (if the file + has been previously opened with fopen). The mode parameter is as in gzopen. + + The next call of gzclose on the returned gzFile will also close the file + descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor + fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, + mode);. The duplicated descriptor should be saved to avoid a leak, since + gzdopen does not close fd if it fails. If you are using fileno() to get the + file descriptor from a FILE *, then you will have to use dup() to avoid + double-close()ing the file descriptor. Both gzclose() and fclose() will + close the associated file descriptor, so they need to have different file + descriptors. + + gzdopen returns NULL if there was insufficient memory to allocate the + gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not + provided, or '+' was provided), or if fd is -1. The file descriptor is not + used until the next gz* read, write, seek, or close operation, so gzdopen + will not detect if fd is invalid (unless fd is -1). +*/ + +ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size)); +/* + Set the internal buffer size used by this library's functions. The + default buffer size is 8192 bytes. This function must be called after + gzopen() or gzdopen(), and before any other calls that read or write the + file. The buffer memory allocation is always deferred to the first read or + write. Three times that size in buffer space is allocated. A larger buffer + size of, for example, 64K or 128K bytes will noticeably increase the speed + of decompression (reading). + + The new buffer size also affects the maximum length for gzprintf(). + + gzbuffer() returns 0 on success, or -1 on failure, such as being called + too late. +*/ + +ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); +/* + Dynamically update the compression level or strategy. See the description + of deflateInit2 for the meaning of these parameters. Previously provided + data is flushed before the parameter change. + + gzsetparams returns Z_OK if success, Z_STREAM_ERROR if the file was not + opened for writing, Z_ERRNO if there is an error writing the flushed data, + or Z_MEM_ERROR if there is a memory allocation error. +*/ + +ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); +/* + Reads the given number of uncompressed bytes from the compressed file. If + the input file is not in gzip format, gzread copies the given number of + bytes into the buffer directly from the file. + + After reaching the end of a gzip stream in the input, gzread will continue + to read, looking for another gzip stream. Any number of gzip streams may be + concatenated in the input file, and will all be decompressed by gzread(). + If something other than a gzip stream is encountered after a gzip stream, + that remaining trailing garbage is ignored (and no error is returned). + + gzread can be used to read a gzip file that is being concurrently written. + Upon reaching the end of the input, gzread will return with the available + data. If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then + gzclearerr can be used to clear the end of file indicator in order to permit + gzread to be tried again. Z_OK indicates that a gzip stream was completed + on the last gzread. Z_BUF_ERROR indicates that the input file ended in the + middle of a gzip stream. Note that gzread does not return -1 in the event + of an incomplete gzip stream. This error is deferred until gzclose(), which + will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip + stream. Alternatively, gzerror can be used before gzclose to detect this + case. + + gzread returns the number of uncompressed bytes actually read, less than + len for end of file, or -1 for error. If len is too large to fit in an int, + then nothing is read, -1 is returned, and the error state is set to + Z_STREAM_ERROR. +*/ + +ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems, + gzFile file)); +/* + Read up to nitems items of size size from file to buf, otherwise operating + as gzread() does. This duplicates the interface of stdio's fread(), with + size_t request and return types. If the library defines size_t, then + z_size_t is identical to size_t. If not, then z_size_t is an unsigned + integer type that can contain a pointer. + + gzfread() returns the number of full items read of size size, or zero if + the end of the file was reached and a full item could not be read, or if + there was an error. gzerror() must be consulted if zero is returned in + order to determine if there was an error. If the multiplication of size and + nitems overflows, i.e. the product does not fit in a z_size_t, then nothing + is read, zero is returned, and the error state is set to Z_STREAM_ERROR. + + In the event that the end of file is reached and only a partial item is + available at the end, i.e. the remaining uncompressed data length is not a + multiple of size, then the final partial item is nevetheless read into buf + and the end-of-file flag is set. The length of the partial item read is not + provided, but could be inferred from the result of gztell(). This behavior + is the same as the behavior of fread() implementations in common libraries, + but it prevents the direct use of gzfread() to read a concurrently written + file, reseting and retrying on end-of-file, when size is not 1. +*/ + +ZEXTERN int ZEXPORT gzwrite OF((gzFile file, + voidpc buf, unsigned len)); +/* + Writes the given number of uncompressed bytes into the compressed file. + gzwrite returns the number of uncompressed bytes written or 0 in case of + error. +*/ + +ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size, + z_size_t nitems, gzFile file)); +/* + gzfwrite() writes nitems items of size size from buf to file, duplicating + the interface of stdio's fwrite(), with size_t request and return types. If + the library defines size_t, then z_size_t is identical to size_t. If not, + then z_size_t is an unsigned integer type that can contain a pointer. + + gzfwrite() returns the number of full items written of size size, or zero + if there was an error. If the multiplication of size and nitems overflows, + i.e. the product does not fit in a z_size_t, then nothing is written, zero + is returned, and the error state is set to Z_STREAM_ERROR. +*/ + +ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...)); +/* + Converts, formats, and writes the arguments to the compressed file under + control of the format string, as in fprintf. gzprintf returns the number of + uncompressed bytes actually written, or a negative zlib error code in case + of error. The number of uncompressed bytes written is limited to 8191, or + one less than the buffer size given to gzbuffer(). The caller should assure + that this limit is not exceeded. If it is exceeded, then gzprintf() will + return an error (0) with nothing written. In this case, there may also be a + buffer overflow with unpredictable consequences, which is possible only if + zlib was compiled with the insecure functions sprintf() or vsprintf() + because the secure snprintf() or vsnprintf() functions were not available. + This can be determined using zlibCompileFlags(). +*/ + +ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); +/* + Writes the given null-terminated string to the compressed file, excluding + the terminating null character. + + gzputs returns the number of characters written, or -1 in case of error. +*/ + +ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len)); +/* + Reads bytes from the compressed file until len-1 characters are read, or a + newline character is read and transferred to buf, or an end-of-file + condition is encountered. If any characters are read or if len == 1, the + string is terminated with a null character. If no characters are read due + to an end-of-file or len < 1, then the buffer is left untouched. + + gzgets returns buf which is a null-terminated string, or it returns NULL + for end-of-file or in case of error. If there was an error, the contents at + buf are indeterminate. +*/ + +ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c)); +/* + Writes c, converted to an unsigned char, into the compressed file. gzputc + returns the value that was written, or -1 in case of error. +*/ + +ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); +/* + Reads one byte from the compressed file. gzgetc returns this byte or -1 + in case of end of file or error. This is implemented as a macro for speed. + As such, it does not do all of the checking the other functions do. I.e. + it does not check to see if file is NULL, nor whether the structure file + points to has been clobbered or not. +*/ + +ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); +/* + Push one character back onto the stream to be read as the first character + on the next read. At least one character of push-back is allowed. + gzungetc() returns the character pushed, or -1 on failure. gzungetc() will + fail if c is -1, and may fail if a character has been pushed but not read + yet. If gzungetc is used immediately after gzopen or gzdopen, at least the + output buffer size of pushed characters is allowed. (See gzbuffer above.) + The pushed character will be discarded if the stream is repositioned with + gzseek() or gzrewind(). +*/ + +ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); +/* + Flushes all pending output into the compressed file. The parameter flush + is as in the deflate() function. The return value is the zlib error number + (see function gzerror below). gzflush is only permitted when writing. + + If the flush parameter is Z_FINISH, the remaining data is written and the + gzip stream is completed in the output. If gzwrite() is called again, a new + gzip stream will be started in the output. gzread() is able to read such + concatenated gzip streams. + + gzflush should be called only when strictly necessary because it will + degrade compression if called too often. +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, + z_off_t offset, int whence)); + + Sets the starting position for the next gzread or gzwrite on the given + compressed file. The offset represents a number of bytes in the + uncompressed data stream. The whence parameter is defined as in lseek(2); + the value SEEK_END is not supported. + + If the file is opened for reading, this function is emulated but can be + extremely slow. If the file is opened for writing, only forward seeks are + supported; gzseek then compresses a sequence of zeroes up to the new + starting position. + + gzseek returns the resulting offset location as measured in bytes from + the beginning of the uncompressed stream, or -1 in case of error, in + particular if the file is opened for writing and the new starting position + would be before the current position. +*/ + +ZEXTERN int ZEXPORT gzrewind OF((gzFile file)); +/* + Rewinds the given file. This function is supported only for reading. + + gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file)); + + Returns the starting position for the next gzread or gzwrite on the given + compressed file. This position represents a number of bytes in the + uncompressed data stream, and is zero when starting, even if appending or + reading a gzip stream from the middle of a file using gzdopen(). + + gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file)); + + Returns the current offset in the file being read or written. This offset + includes the count of bytes that precede the gzip stream, for example when + appending or when using gzdopen() for reading. When reading, the offset + does not include as yet unused buffered input. This information can be used + for a progress indicator. On error, gzoffset() returns -1. +*/ + +ZEXTERN int ZEXPORT gzeof OF((gzFile file)); +/* + Returns true (1) if the end-of-file indicator has been set while reading, + false (0) otherwise. Note that the end-of-file indicator is set only if the + read tried to go past the end of the input, but came up short. Therefore, + just like feof(), gzeof() may return false even if there is no more data to + read, in the event that the last read request was for the exact number of + bytes remaining in the input file. This will happen if the input file size + is an exact multiple of the buffer size. + + If gzeof() returns true, then the read functions will return no more data, + unless the end-of-file indicator is reset by gzclearerr() and the input file + has grown since the previous end of file was detected. +*/ + +ZEXTERN int ZEXPORT gzdirect OF((gzFile file)); +/* + Returns true (1) if file is being copied directly while reading, or false + (0) if file is a gzip stream being decompressed. + + If the input file is empty, gzdirect() will return true, since the input + does not contain a gzip stream. + + If gzdirect() is used immediately after gzopen() or gzdopen() it will + cause buffers to be allocated to allow reading the file to determine if it + is a gzip file. Therefore if gzbuffer() is used, it should be called before + gzdirect(). + + When writing, gzdirect() returns true (1) if transparent writing was + requested ("wT" for the gzopen() mode), or false (0) otherwise. (Note: + gzdirect() is not needed when writing. Transparent writing must be + explicitly requested, so the application already knows the answer. When + linking statically, using gzdirect() will include all of the zlib code for + gzip file reading and decompression, which may not be desired.) +*/ + +ZEXTERN int ZEXPORT gzclose OF((gzFile file)); +/* + Flushes all pending output if necessary, closes the compressed file and + deallocates the (de)compression state. Note that once file is closed, you + cannot call gzerror with file, since its structures have been deallocated. + gzclose must not be called more than once on the same file, just as free + must not be called more than once on the same allocation. + + gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a + file operation error, Z_MEM_ERROR if out of memory, Z_BUF_ERROR if the + last read ended in the middle of a gzip stream, or Z_OK on success. +*/ + +ZEXTERN int ZEXPORT gzclose_r OF((gzFile file)); +ZEXTERN int ZEXPORT gzclose_w OF((gzFile file)); +/* + Same as gzclose(), but gzclose_r() is only for use when reading, and + gzclose_w() is only for use when writing or appending. The advantage to + using these instead of gzclose() is that they avoid linking in zlib + compression or decompression code that is not used when only reading or only + writing respectively. If gzclose() is used, then both compression and + decompression code will be included the application when linking to a static + zlib library. +*/ + +ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum)); +/* + Returns the error message for the last error which occurred on the given + compressed file. errnum is set to zlib error number. If an error occurred + in the file system and not in the compression library, errnum is set to + Z_ERRNO and the application may consult errno to get the exact error code. + + The application must not modify the returned string. Future calls to + this function may invalidate the previously returned string. If file is + closed, then the string previously returned by gzerror will no longer be + available. + + gzerror() should be used to distinguish errors from end-of-file for those + functions above that do not distinguish those cases in their return values. +*/ + +ZEXTERN void ZEXPORT gzclearerr OF((gzFile file)); +/* + Clears the error and end-of-file flags for file. This is analogous to the + clearerr() function in stdio. This is useful for continuing to read a gzip + file that is being written concurrently. +*/ + +#endif /* !Z_SOLO */ + + /* checksum functions */ + +/* + These functions are not related to compression but are exported + anyway because they might be useful in applications using the compression + library. +*/ + +ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); +/* + Update a running Adler-32 checksum with the bytes buf[0..len-1] and + return the updated checksum. If buf is Z_NULL, this function returns the + required initial value for the checksum. + + An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed + much faster. + + Usage example: + + uLong adler = adler32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + adler = adler32(adler, buffer, length); + } + if (adler != original_adler) error(); +*/ + +ZEXTERN uLong ZEXPORT adler32_z OF((uLong adler, const Bytef *buf, + z_size_t len)); +/* + Same as adler32(), but with a size_t length. +*/ + +/* +ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, + z_off_t len2)); + + Combine two Adler-32 checksums into one. For two sequences of bytes, seq1 + and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for + each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of + seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. Note + that the z_off_t type (like off_t) is a signed integer. If len2 is + negative, the result has no meaning or utility. +*/ + +ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); +/* + Update a running CRC-32 with the bytes buf[0..len-1] and return the + updated CRC-32. If buf is Z_NULL, this function returns the required + initial value for the crc. Pre- and post-conditioning (one's complement) is + performed within this function so it shouldn't be done by the application. + + Usage example: + + uLong crc = crc32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + crc = crc32(crc, buffer, length); + } + if (crc != original_crc) error(); +*/ + +ZEXTERN uLong ZEXPORT crc32_z OF((uLong adler, const Bytef *buf, + z_size_t len)); +/* + Same as crc32(), but with a size_t length. +*/ + +/* +ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); + + Combine two CRC-32 check values into one. For two sequences of bytes, + seq1 and seq2 with lengths len1 and len2, CRC-32 check values were + calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32 + check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and + len2. +*/ + + + /* various hacks, don't look :) */ + +/* deflateInit and inflateInit are macros to allow checking the zlib version + * and the compiler's view of z_stream: + */ +ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method, + int windowBits, int memLevel, + int strategy, const char *version, + int stream_size)); +ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits, + unsigned char FAR *window, + const char *version, + int stream_size)); +#ifdef Z_PREFIX_SET +# define z_deflateInit(strm, level) \ + deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_inflateInit(strm) \ + inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ + deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ + (strategy), ZLIB_VERSION, (int)sizeof(z_stream)) +# define z_inflateInit2(strm, windowBits) \ + inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ + (int)sizeof(z_stream)) +# define z_inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, (int)sizeof(z_stream)) +#else +# define deflateInit(strm, level) \ + deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) +# define inflateInit(strm) \ + inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) +# define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ + deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ + (strategy), ZLIB_VERSION, (int)sizeof(z_stream)) +# define inflateInit2(strm, windowBits) \ + inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ + (int)sizeof(z_stream)) +# define inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, (int)sizeof(z_stream)) +#endif + +#ifndef Z_SOLO + +/* gzgetc() macro and its supporting function and exposed data structure. Note + * that the real internal state is much larger than the exposed structure. + * This abbreviated structure exposes just enough for the gzgetc() macro. The + * user should not mess with these exposed elements, since their names or + * behavior could change in the future, perhaps even capriciously. They can + * only be used by the gzgetc() macro. You have been warned. + */ +struct gzFile_s { + unsigned have; + unsigned char *next; + z_off64_t pos; +}; +ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */ +#ifdef Z_PREFIX_SET +# undef z_gzgetc +# define z_gzgetc(g) \ + ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g)) +#else +# define gzgetc(g) \ + ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g)) +#endif + +/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or + * change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if + * both are true, the application gets the *64 functions, and the regular + * functions are changed to 64 bits) -- in case these are set on systems + * without large file support, _LFS64_LARGEFILE must also be true + */ +#ifdef Z_LARGE64 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); + ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t)); +#endif + +#if !defined(ZLIB_INTERNAL) && defined(Z_WANT64) +# ifdef Z_PREFIX_SET +# define z_gzopen z_gzopen64 +# define z_gzseek z_gzseek64 +# define z_gztell z_gztell64 +# define z_gzoffset z_gzoffset64 +# define z_adler32_combine z_adler32_combine64 +# define z_crc32_combine z_crc32_combine64 +# else +# define gzopen gzopen64 +# define gzseek gzseek64 +# define gztell gztell64 +# define gzoffset gzoffset64 +# define adler32_combine adler32_combine64 +# define crc32_combine crc32_combine64 +# endif +# ifndef Z_LARGE64 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); +# endif +#else + ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); +#endif + +#else /* Z_SOLO */ + + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); + +#endif /* !Z_SOLO */ + +/* undocumented functions */ +ZEXTERN const char * ZEXPORT zError OF((int)); +ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); +ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void)); +ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); +ZEXTERN int ZEXPORT inflateValidate OF((z_streamp, int)); +ZEXTERN unsigned long ZEXPORT inflateCodesUsed OF ((z_streamp)); +ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp)); +ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp)); +#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO) +ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path, + const char *mode)); +#endif +#if defined(STDC) || defined(Z_HAVE_STDARG_H) +# ifndef Z_SOLO +ZEXTERN int ZEXPORTVA gzvprintf Z_ARG((gzFile file, + const char *format, + va_list va)); +# endif +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* ZLIB_H */