1050 lines
28 KiB
C
1050 lines
28 KiB
C
/*****************************************************************************
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* vlc_common.h: common definitions
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* Collection of useful common types and macros definitions
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*****************************************************************************
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* Copyright (C) 1998-2011 VLC authors and VideoLAN
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*
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* Authors: Samuel Hocevar <sam@via.ecp.fr>
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* Vincent Seguin <seguin@via.ecp.fr>
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* Gildas Bazin <gbazin@videolan.org>
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* Rémi Denis-Courmont
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/**
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* \file
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* This file is a collection of common definitions and types
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*/
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#ifndef VLC_COMMON_H
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# define VLC_COMMON_H 1
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/*****************************************************************************
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* Required vlc headers
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*****************************************************************************/
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#include "vlc_config.h"
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/*****************************************************************************
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* Required system headers
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*****************************************************************************/
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdio.h>
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#include <inttypes.h>
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#include <stddef.h>
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#ifndef __cplusplus
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# include <stdbool.h>
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#endif
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/*****************************************************************************
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* Compilers definitions
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*****************************************************************************/
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/* Helper for GCC version checks */
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#ifdef __GNUC__
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# define VLC_GCC_VERSION(maj,min) \
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((__GNUC__ > (maj)) || (__GNUC__ == (maj) && __GNUC_MINOR__ >= (min)))
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#else
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# define VLC_GCC_VERSION(maj,min) (0)
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#endif
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/* Try to fix format strings for all versions of mingw and mingw64 */
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#if defined( _WIN32 ) && defined( __USE_MINGW_ANSI_STDIO )
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#undef PRId64
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#define PRId64 "lld"
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#undef PRIi64
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#define PRIi64 "lli"
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#undef PRIu64
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#define PRIu64 "llu"
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#undef PRIo64
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#define PRIo64 "llo"
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#undef PRIx64
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#define PRIx64 "llx"
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#define snprintf __mingw_snprintf
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#define vsnprintf __mingw_vsnprintf
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#define swprintf _snwprintf
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#endif
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/* Function attributes for compiler warnings */
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#ifdef __GNUC__
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# define VLC_DEPRECATED __attribute__((deprecated))
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# if VLC_GCC_VERSION(6,0)
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# define VLC_DEPRECATED_ENUM __attribute__((deprecated))
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# else
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# define VLC_DEPRECATED_ENUM
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# endif
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# if defined( _WIN32 )
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# define VLC_FORMAT(x,y) __attribute__ ((format(gnu_printf,x,y)))
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# else
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# define VLC_FORMAT(x,y) __attribute__ ((format(printf,x,y)))
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# endif
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# define VLC_FORMAT_ARG(x) __attribute__ ((format_arg(x)))
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# define VLC_MALLOC __attribute__ ((malloc))
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# define VLC_USED __attribute__ ((warn_unused_result))
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#else
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# define VLC_DEPRECATED
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# define VLC_DEPRECATED_ENUM
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# define VLC_FORMAT(x,y)
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# define VLC_FORMAT_ARG(x)
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# define VLC_MALLOC
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# define VLC_USED
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#endif
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/* Branch prediction */
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#ifdef __GNUC__
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# define likely(p) __builtin_expect(!!(p), 1)
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# define unlikely(p) __builtin_expect(!!(p), 0)
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# define unreachable() __builtin_unreachable()
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#else
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# define likely(p) (!!(p))
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# define unlikely(p) (!!(p))
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# define unreachable() ((void)0)
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#endif
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#define vlc_assert_unreachable() (assert(!"unreachable"), unreachable())
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/* Linkage */
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#ifdef __cplusplus
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# define VLC_EXTERN extern "C"
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#else
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# define VLC_EXTERN
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#endif
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#if defined (_WIN32) && defined (DLL_EXPORT)
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# define VLC_EXPORT __declspec(dllexport)
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#elif defined (__GNUC__)
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# define VLC_EXPORT __attribute__((visibility("default")))
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#else
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# define VLC_EXPORT
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#endif
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#define VLC_API VLC_EXTERN VLC_EXPORT
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/*****************************************************************************
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* Basic types definitions
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*****************************************************************************/
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/**
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* High precision date or time interval
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*
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* Store a high precision date or time interval. The maximum precision is the
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* microsecond, and a 64 bits integer is used to avoid overflows (maximum
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* time interval is then 292271 years, which should be long enough for any
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* video). Dates are stored as microseconds since a common date (usually the
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* epoch). Note that date and time intervals can be manipulated using regular
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* arithmetic operators, and that no special functions are required.
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*/
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typedef int64_t mtime_t;
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/**
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* The vlc_fourcc_t type.
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*
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* See http://www.webartz.com/fourcc/ for a very detailed list.
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*/
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typedef uint32_t vlc_fourcc_t;
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#ifdef WORDS_BIGENDIAN
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# define VLC_FOURCC( a, b, c, d ) \
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( ((uint32_t)d) | ( ((uint32_t)c) << 8 ) \
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| ( ((uint32_t)b) << 16 ) | ( ((uint32_t)a) << 24 ) )
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# define VLC_TWOCC( a, b ) \
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( (uint16_t)(b) | ( (uint16_t)(a) << 8 ) )
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#else
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# define VLC_FOURCC( a, b, c, d ) \
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( ((uint32_t)a) | ( ((uint32_t)b) << 8 ) \
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| ( ((uint32_t)c) << 16 ) | ( ((uint32_t)d) << 24 ) )
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# define VLC_TWOCC( a, b ) \
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( (uint16_t)(a) | ( (uint16_t)(b) << 8 ) )
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#endif
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/**
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* Translate a vlc_fourcc into its string representation. This function
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* assumes there is enough room in psz_fourcc to store 4 characters in.
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*
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* \param fcc a vlc_fourcc_t
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* \param psz_fourcc string to store string representation of vlc_fourcc in
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*/
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static inline void vlc_fourcc_to_char( vlc_fourcc_t fcc, char *psz_fourcc )
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{
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memcpy( psz_fourcc, &fcc, 4 );
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}
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/*****************************************************************************
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* Classes declaration
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*****************************************************************************/
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/* Internal types */
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typedef struct vlc_list_t vlc_list_t;
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typedef struct vlc_object_t vlc_object_t;
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typedef struct libvlc_int_t libvlc_int_t;
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typedef struct date_t date_t;
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/* Playlist */
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typedef struct playlist_t playlist_t;
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typedef struct playlist_item_t playlist_item_t;
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typedef struct services_discovery_t services_discovery_t;
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typedef struct services_discovery_sys_t services_discovery_sys_t;
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typedef struct vlc_renderer_discovery_t vlc_renderer_discovery_t;
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typedef struct vlc_renderer_item_t vlc_renderer_item_t;
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/* Modules */
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typedef struct module_t module_t;
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typedef struct module_config_t module_config_t;
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typedef struct config_category_t config_category_t;
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/* Input */
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typedef struct input_thread_t input_thread_t;
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typedef struct input_item_t input_item_t;
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typedef struct input_item_node_t input_item_node_t;
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typedef struct access_sys_t access_sys_t;
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typedef struct stream_t stream_t;
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typedef struct stream_sys_t stream_sys_t;
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typedef struct demux_t demux_t;
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typedef struct demux_sys_t demux_sys_t;
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typedef struct es_out_t es_out_t;
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typedef struct es_out_id_t es_out_id_t;
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typedef struct es_out_sys_t es_out_sys_t;
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typedef struct seekpoint_t seekpoint_t;
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typedef struct info_t info_t;
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typedef struct info_category_t info_category_t;
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typedef struct input_attachment_t input_attachment_t;
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/* Format */
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typedef struct audio_format_t audio_format_t;
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typedef struct video_format_t video_format_t;
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typedef struct subs_format_t subs_format_t;
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typedef struct es_format_t es_format_t;
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typedef struct video_palette_t video_palette_t;
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/* Audio */
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typedef struct audio_output audio_output_t;
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typedef struct aout_sys_t aout_sys_t;
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typedef audio_format_t audio_sample_format_t;
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/* Video */
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typedef struct vout_thread_t vout_thread_t;
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typedef struct vlc_viewpoint_t vlc_viewpoint_t;
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typedef video_format_t video_frame_format_t;
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typedef struct picture_t picture_t;
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typedef struct picture_sys_t picture_sys_t;
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/* Subpictures */
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typedef struct spu_t spu_t;
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typedef struct subpicture_t subpicture_t;
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typedef struct subpicture_region_t subpicture_region_t;
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typedef struct image_handler_t image_handler_t;
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/* Stream output */
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typedef struct sout_instance_t sout_instance_t;
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typedef struct sout_input_t sout_input_t;
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typedef struct sout_packetizer_input_t sout_packetizer_input_t;
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typedef struct sout_access_out_t sout_access_out_t;
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typedef struct sout_access_out_sys_t sout_access_out_sys_t;
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typedef struct sout_mux_t sout_mux_t;
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typedef struct sout_mux_sys_t sout_mux_sys_t;
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typedef struct sout_stream_t sout_stream_t;
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typedef struct sout_stream_sys_t sout_stream_sys_t;
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typedef struct config_chain_t config_chain_t;
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typedef struct session_descriptor_t session_descriptor_t;
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/* Decoders */
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typedef struct decoder_t decoder_t;
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typedef struct decoder_sys_t decoder_sys_t;
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typedef struct decoder_synchro_t decoder_synchro_t;
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/* Encoders */
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typedef struct encoder_t encoder_t;
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typedef struct encoder_sys_t encoder_sys_t;
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/* Filters */
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typedef struct filter_t filter_t;
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typedef struct filter_sys_t filter_sys_t;
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/* Network */
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typedef struct vlc_url_t vlc_url_t;
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/* Misc */
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typedef struct iso639_lang_t iso639_lang_t;
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/* block */
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typedef struct block_t block_t;
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typedef struct block_fifo_t block_fifo_t;
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/* Hashing */
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typedef struct md5_s md5_t;
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/* XML */
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typedef struct xml_t xml_t;
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typedef struct xml_sys_t xml_sys_t;
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typedef struct xml_reader_t xml_reader_t;
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typedef struct xml_reader_sys_t xml_reader_sys_t;
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/* vod server */
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typedef struct vod_t vod_t;
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typedef struct vod_sys_t vod_sys_t;
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typedef struct vod_media_t vod_media_t;
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/* VLM */
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typedef struct vlm_t vlm_t;
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typedef struct vlm_message_t vlm_message_t;
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/* misc */
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typedef struct vlc_meta_t vlc_meta_t;
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typedef struct input_stats_t input_stats_t;
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typedef struct addon_entry_t addon_entry_t;
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/* Update */
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typedef struct update_t update_t;
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/**
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* VLC value structure
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*/
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typedef union
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{
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int64_t i_int;
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bool b_bool;
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float f_float;
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char * psz_string;
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void * p_address;
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vlc_list_t * p_list;
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struct { int32_t x; int32_t y; } coords;
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} vlc_value_t;
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/**
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* VLC list structure
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*/
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struct vlc_list_t
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{
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int i_type;
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int i_count;
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vlc_value_t *p_values;
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};
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/*****************************************************************************
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* Error values (shouldn't be exposed)
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*****************************************************************************/
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#define VLC_SUCCESS (-0) /**< No error */
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#define VLC_EGENERIC (-1) /**< Unspecified error */
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#define VLC_ENOMEM (-2) /**< Not enough memory */
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#define VLC_ETIMEOUT (-3) /**< Timeout */
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#define VLC_ENOMOD (-4) /**< Module not found */
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#define VLC_ENOOBJ (-5) /**< Object not found */
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#define VLC_ENOVAR (-6) /**< Variable not found */
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#define VLC_EBADVAR (-7) /**< Bad variable value */
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#define VLC_ENOITEM (-8) /**< Item not found */
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/*****************************************************************************
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* Variable callbacks: called when the value is modified
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*****************************************************************************/
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typedef int ( * vlc_callback_t ) ( vlc_object_t *, /* variable's object */
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char const *, /* variable name */
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vlc_value_t, /* old value */
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vlc_value_t, /* new value */
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void * ); /* callback data */
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/*****************************************************************************
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* List callbacks: called when elements are added/removed from the list
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*****************************************************************************/
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typedef int ( * vlc_list_callback_t ) ( vlc_object_t *, /* variable's object */
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char const *, /* variable name */
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int, /* VLC_VAR_* action */
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vlc_value_t *, /* new/deleted value */
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void *); /* callback data */
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/*****************************************************************************
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* OS-specific headers and thread types
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*****************************************************************************/
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#if defined( _WIN32 )
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# include <malloc.h>
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# ifndef PATH_MAX
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# define PATH_MAX MAX_PATH
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# endif
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# include <windows.h>
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#endif
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#ifdef __APPLE__
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#include <sys/syslimits.h>
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#include <AvailabilityMacros.h>
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#endif
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#ifdef __OS2__
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# define OS2EMX_PLAIN_CHAR
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# define INCL_BASE
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# define INCL_PM
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# include <os2safe.h>
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# include <os2.h>
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#endif
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#include "vlc_mtime.h"
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#include "vlc_threads.h"
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/**
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* Common structure members
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*****************************************************************************/
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/**
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* VLC object common members
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*
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* Common public properties for all VLC objects.
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* Object also have private properties maintained by the core, see
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* \ref vlc_object_internals_t
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*/
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struct vlc_common_members
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{
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/** Object type name
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*
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* A constant string identifying the type of the object (for logging)
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*/
|
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const char *object_type;
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|
|
/** Log messages header
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|
*
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|
* Human-readable header for log messages. This is not thread-safe and
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|
* only used by VLM and Lua interfaces.
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|
*/
|
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char *header;
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int flags;
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|
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/** Module probe flag
|
|
*
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* A boolean during module probing when the probe is "forced".
|
|
* See \ref module_need().
|
|
*/
|
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bool force;
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|
|
/** LibVLC instance
|
|
*
|
|
* Root VLC object of the objects tree that this object belongs in.
|
|
*/
|
|
libvlc_int_t *libvlc;
|
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|
|
/** Parent object
|
|
*
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|
* The parent VLC object in the objects tree. For the root (the LibVLC
|
|
* instance) object, this is NULL.
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|
*/
|
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vlc_object_t *parent;
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};
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|
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/**
|
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* Backward compatibility macro
|
|
*/
|
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#define VLC_COMMON_MEMBERS struct vlc_common_members obj;
|
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|
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/**
|
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* Type-safe vlc_object_t cast
|
|
*
|
|
* This macro attempts to cast a pointer to a compound type to a
|
|
* \ref vlc_object_t pointer in a type-safe manner.
|
|
* It checks if the compound type actually starts with an embedded
|
|
* \ref vlc_object_t structure.
|
|
*/
|
|
#if !defined(__cplusplus)
|
|
# define VLC_OBJECT(x) \
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_Generic((x)->obj, \
|
|
struct vlc_common_members: (vlc_object_t *)(&(x)->obj), \
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const struct vlc_common_members: (const vlc_object_t *)(&(x)->obj) \
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)
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#else
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|
# define VLC_OBJECT( x ) ((vlc_object_t *)&(x)->obj)
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#endif
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|
|
/*****************************************************************************
|
|
* Macros and inline functions
|
|
*****************************************************************************/
|
|
|
|
/* __MAX and __MIN: self explanatory */
|
|
#ifndef __MAX
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|
# define __MAX(a, b) ( ((a) > (b)) ? (a) : (b) )
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#endif
|
|
#ifndef __MIN
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|
# define __MIN(a, b) ( ((a) < (b)) ? (a) : (b) )
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#endif
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|
|
/* clip v in [min, max] */
|
|
#define VLC_CLIP(v, min, max) __MIN(__MAX((v), (min)), (max))
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|
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VLC_USED
|
|
static inline int64_t GCD ( int64_t a, int64_t b )
|
|
{
|
|
while( b )
|
|
{
|
|
int64_t c = a % b;
|
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a = b;
|
|
b = c;
|
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}
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return a;
|
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}
|
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|
|
/* function imported from libavutil/common.h */
|
|
VLC_USED
|
|
static inline uint8_t clip_uint8_vlc( int32_t a )
|
|
{
|
|
if( a&(~255) ) return (-a)>>31;
|
|
else return a;
|
|
}
|
|
|
|
/** Count leading zeroes */
|
|
VLC_USED
|
|
static inline unsigned (clz)(unsigned x)
|
|
{
|
|
#ifdef __GNUC__
|
|
return __builtin_clz (x);
|
|
#else
|
|
unsigned i = sizeof (x) * 8;
|
|
|
|
while (x)
|
|
{
|
|
x >>= 1;
|
|
i--;
|
|
}
|
|
return i;
|
|
#endif
|
|
}
|
|
|
|
#define clz8( x ) (clz(x) - ((sizeof(unsigned) - sizeof (uint8_t)) * 8))
|
|
#define clz16( x ) (clz(x) - ((sizeof(unsigned) - sizeof (uint16_t)) * 8))
|
|
/* XXX: this assumes that int is 32-bits or more */
|
|
#define clz32( x ) (clz(x) - ((sizeof(unsigned) - sizeof (uint32_t)) * 8))
|
|
|
|
/** Count trailing zeroes */
|
|
VLC_USED
|
|
static inline unsigned (ctz)(unsigned x)
|
|
{
|
|
#ifdef __GNUC__
|
|
return __builtin_ctz (x);
|
|
#else
|
|
unsigned i = sizeof (x) * 8;
|
|
|
|
while (x)
|
|
{
|
|
x <<= 1;
|
|
i--;
|
|
}
|
|
return i;
|
|
#endif
|
|
}
|
|
|
|
#if !defined(__NetBSD__)
|
|
/** Bit weight */
|
|
VLC_USED
|
|
static inline unsigned (popcount)(unsigned x)
|
|
{
|
|
#ifdef __GNUC__
|
|
return __builtin_popcount (x);
|
|
#else
|
|
unsigned count = 0;
|
|
while (x)
|
|
{
|
|
count += x & 1;
|
|
x = x >> 1;
|
|
}
|
|
return count;
|
|
#endif
|
|
}
|
|
|
|
/** Bit weight of long long */
|
|
VLC_USED
|
|
static inline int (popcountll)(unsigned long long x)
|
|
{
|
|
#ifdef __GNUC__
|
|
return __builtin_popcountll(x);
|
|
#else
|
|
int count = 0;
|
|
while (x)
|
|
{
|
|
count += x & 1;
|
|
x = x >> 1;
|
|
}
|
|
return count;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
VLC_USED
|
|
static inline unsigned (parity)(unsigned x)
|
|
{
|
|
#ifdef __GNUC__
|
|
return __builtin_parity (x);
|
|
#else
|
|
for (unsigned i = 4 * sizeof (x); i > 0; i /= 2)
|
|
x ^= x >> i;
|
|
return x & 1;
|
|
#endif
|
|
}
|
|
|
|
#if !defined(__NetBSD__)
|
|
/** Byte swap (16 bits) */
|
|
VLC_USED
|
|
static inline uint16_t (bswap16)(uint16_t x)
|
|
{
|
|
return (x << 8) | (x >> 8);
|
|
}
|
|
|
|
/** Byte swap (32 bits) */
|
|
VLC_USED
|
|
static inline uint32_t (bswap32)(uint32_t x)
|
|
{
|
|
#if defined (__GNUC__) || defined(__clang__)
|
|
return __builtin_bswap32 (x);
|
|
#else
|
|
return ((x & 0x000000FF) << 24)
|
|
| ((x & 0x0000FF00) << 8)
|
|
| ((x & 0x00FF0000) >> 8)
|
|
| ((x & 0xFF000000) >> 24);
|
|
#endif
|
|
}
|
|
|
|
/** Byte swap (64 bits) */
|
|
VLC_USED
|
|
static inline uint64_t (bswap64)(uint64_t x)
|
|
{
|
|
#if defined (__GNUC__) || defined(__clang__)
|
|
return __builtin_bswap64 (x);
|
|
#elif !defined (__cplusplus)
|
|
return ((x & 0x00000000000000FF) << 56)
|
|
| ((x & 0x000000000000FF00) << 40)
|
|
| ((x & 0x0000000000FF0000) << 24)
|
|
| ((x & 0x00000000FF000000) << 8)
|
|
| ((x & 0x000000FF00000000) >> 8)
|
|
| ((x & 0x0000FF0000000000) >> 24)
|
|
| ((x & 0x00FF000000000000) >> 40)
|
|
| ((x & 0xFF00000000000000) >> 56);
|
|
#else
|
|
return ((x & 0x00000000000000FFULL) << 56)
|
|
| ((x & 0x000000000000FF00ULL) << 40)
|
|
| ((x & 0x0000000000FF0000ULL) << 24)
|
|
| ((x & 0x00000000FF000000ULL) << 8)
|
|
| ((x & 0x000000FF00000000ULL) >> 8)
|
|
| ((x & 0x0000FF0000000000ULL) >> 24)
|
|
| ((x & 0x00FF000000000000ULL) >> 40)
|
|
| ((x & 0xFF00000000000000ULL) >> 56);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
/* Integer overflow */
|
|
static inline bool uadd_overflow(unsigned a, unsigned b, unsigned *res)
|
|
{
|
|
#if VLC_GCC_VERSION(5,0) || defined(__clang__)
|
|
return __builtin_uadd_overflow(a, b, res);
|
|
#else
|
|
*res = a + b;
|
|
return (a + b) < a;
|
|
#endif
|
|
}
|
|
|
|
static inline bool uaddl_overflow(unsigned long a, unsigned long b,
|
|
unsigned long *res)
|
|
{
|
|
#if VLC_GCC_VERSION(5,0) || defined(__clang__)
|
|
return __builtin_uaddl_overflow(a, b, res);
|
|
#else
|
|
*res = a + b;
|
|
return (a + b) < a;
|
|
#endif
|
|
}
|
|
|
|
static inline bool uaddll_overflow(unsigned long long a, unsigned long long b,
|
|
unsigned long long *res)
|
|
{
|
|
#if VLC_GCC_VERSION(5,0) || defined(__clang__)
|
|
return __builtin_uaddll_overflow(a, b, res);
|
|
#else
|
|
*res = a + b;
|
|
return (a + b) < a;
|
|
#endif
|
|
}
|
|
|
|
#ifndef __cplusplus
|
|
# define add_overflow(a,b,r) \
|
|
_Generic(*(r), \
|
|
unsigned: uadd_overflow(a, b, (unsigned *)(r)), \
|
|
unsigned long: uaddl_overflow(a, b, (unsigned long *)(r)), \
|
|
unsigned long long: uaddll_overflow(a, b, (unsigned long long *)(r)))
|
|
#else
|
|
static inline bool add_overflow(unsigned a, unsigned b, unsigned *res)
|
|
{
|
|
return uadd_overflow(a, b, res);
|
|
}
|
|
|
|
static inline bool add_overflow(unsigned long a, unsigned long b,
|
|
unsigned long *res)
|
|
{
|
|
return uaddl_overflow(a, b, res);
|
|
}
|
|
|
|
static inline bool add_overflow(unsigned long long a, unsigned long long b,
|
|
unsigned long long *res)
|
|
{
|
|
return uaddll_overflow(a, b, res);
|
|
}
|
|
#endif
|
|
|
|
#if !(VLC_GCC_VERSION(5,0) || defined(__clang__))
|
|
# include <limits.h>
|
|
#endif
|
|
|
|
static inline bool umul_overflow(unsigned a, unsigned b, unsigned *res)
|
|
{
|
|
#if VLC_GCC_VERSION(5,0) || defined(__clang__)
|
|
return __builtin_umul_overflow(a, b, res);
|
|
#else
|
|
*res = a * b;
|
|
return b > 0 && a > (UINT_MAX / b);
|
|
#endif
|
|
}
|
|
|
|
static inline bool umull_overflow(unsigned long a, unsigned long b,
|
|
unsigned long *res)
|
|
{
|
|
#if VLC_GCC_VERSION(5,0) || defined(__clang__)
|
|
return __builtin_umull_overflow(a, b, res);
|
|
#else
|
|
*res = a * b;
|
|
return b > 0 && a > (ULONG_MAX / b);
|
|
#endif
|
|
}
|
|
|
|
static inline bool umulll_overflow(unsigned long long a, unsigned long long b,
|
|
unsigned long long *res)
|
|
{
|
|
#if VLC_GCC_VERSION(5,0) || defined(__clang__)
|
|
return __builtin_umulll_overflow(a, b, res);
|
|
#else
|
|
*res = a * b;
|
|
return b > 0 && a > (ULLONG_MAX / b);
|
|
#endif
|
|
}
|
|
|
|
#ifndef __cplusplus
|
|
#define mul_overflow(a,b,r) \
|
|
_Generic(*(r), \
|
|
unsigned: umul_overflow(a, b, (unsigned *)(r)), \
|
|
unsigned long: umull_overflow(a, b, (unsigned long *)(r)), \
|
|
unsigned long long: umulll_overflow(a, b, (unsigned long long *)(r)))
|
|
#else
|
|
static inline bool mul_overflow(unsigned a, unsigned b, unsigned *res)
|
|
{
|
|
return umul_overflow(a, b, res);
|
|
}
|
|
|
|
static inline bool mul_overflow(unsigned long a, unsigned long b,
|
|
unsigned long *res)
|
|
{
|
|
return umull_overflow(a, b, res);
|
|
}
|
|
|
|
static inline bool mul_overflow(unsigned long long a, unsigned long long b,
|
|
unsigned long long *res)
|
|
{
|
|
return umulll_overflow(a, b, res);
|
|
}
|
|
#endif
|
|
|
|
/* Free and set set the variable to NULL */
|
|
#define FREENULL(a) do { free( a ); a = NULL; } while(0)
|
|
|
|
#define EMPTY_STR(str) (!str || !*str)
|
|
|
|
VLC_API char const * vlc_error( int ) VLC_USED;
|
|
|
|
#include <vlc_arrays.h>
|
|
|
|
/* MSB (big endian)/LSB (little endian) conversions - network order is always
|
|
* MSB, and should be used for both network communications and files. */
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
# define hton16(i) ((uint16_t)(i))
|
|
# define hton32(i) ((uint32_t)(i))
|
|
# define hton64(i) ((uint64_t)(i))
|
|
#else
|
|
# define hton16(i) bswap16(i)
|
|
# define hton32(i) bswap32(i)
|
|
# define hton64(i) bswap64(i)
|
|
#endif
|
|
#define ntoh16(i) hton16(i)
|
|
#define ntoh32(i) hton32(i)
|
|
#define ntoh64(i) hton64(i)
|
|
|
|
/** Reads 16 bits in network byte order */
|
|
VLC_USED
|
|
static inline uint16_t U16_AT (const void *p)
|
|
{
|
|
uint16_t x;
|
|
|
|
memcpy (&x, p, sizeof (x));
|
|
return ntoh16 (x);
|
|
}
|
|
|
|
/** Reads 32 bits in network byte order */
|
|
VLC_USED
|
|
static inline uint32_t U32_AT (const void *p)
|
|
{
|
|
uint32_t x;
|
|
|
|
memcpy (&x, p, sizeof (x));
|
|
return ntoh32 (x);
|
|
}
|
|
|
|
/** Reads 64 bits in network byte order */
|
|
VLC_USED
|
|
static inline uint64_t U64_AT (const void *p)
|
|
{
|
|
uint64_t x;
|
|
|
|
memcpy (&x, p, sizeof (x));
|
|
return ntoh64 (x);
|
|
}
|
|
|
|
#define GetWBE(p) U16_AT(p)
|
|
#define GetDWBE(p) U32_AT(p)
|
|
#define GetQWBE(p) U64_AT(p)
|
|
|
|
/** Reads 16 bits in little-endian order */
|
|
VLC_USED
|
|
static inline uint16_t GetWLE (const void *p)
|
|
{
|
|
uint16_t x;
|
|
|
|
memcpy (&x, p, sizeof (x));
|
|
#ifdef WORDS_BIGENDIAN
|
|
x = bswap16 (x);
|
|
#endif
|
|
return x;
|
|
}
|
|
|
|
/** Reads 32 bits in little-endian order */
|
|
VLC_USED
|
|
static inline uint32_t GetDWLE (const void *p)
|
|
{
|
|
uint32_t x;
|
|
|
|
memcpy (&x, p, sizeof (x));
|
|
#ifdef WORDS_BIGENDIAN
|
|
x = bswap32 (x);
|
|
#endif
|
|
return x;
|
|
}
|
|
|
|
/** Reads 64 bits in little-endian order */
|
|
VLC_USED
|
|
static inline uint64_t GetQWLE (const void *p)
|
|
{
|
|
uint64_t x;
|
|
|
|
memcpy (&x, p, sizeof (x));
|
|
#ifdef WORDS_BIGENDIAN
|
|
x = bswap64 (x);
|
|
#endif
|
|
return x;
|
|
}
|
|
|
|
/** Writes 16 bits in network byte order */
|
|
static inline void SetWBE (void *p, uint16_t w)
|
|
{
|
|
w = hton16 (w);
|
|
memcpy (p, &w, sizeof (w));
|
|
}
|
|
|
|
/** Writes 32 bits in network byte order */
|
|
static inline void SetDWBE (void *p, uint32_t dw)
|
|
{
|
|
dw = hton32 (dw);
|
|
memcpy (p, &dw, sizeof (dw));
|
|
}
|
|
|
|
/** Writes 64 bits in network byte order */
|
|
static inline void SetQWBE (void *p, uint64_t qw)
|
|
{
|
|
qw = hton64 (qw);
|
|
memcpy (p, &qw, sizeof (qw));
|
|
}
|
|
|
|
/** Writes 16 bits in little endian order */
|
|
static inline void SetWLE (void *p, uint16_t w)
|
|
{
|
|
#ifdef WORDS_BIGENDIAN
|
|
w = bswap16 (w);
|
|
#endif
|
|
memcpy (p, &w, sizeof (w));
|
|
}
|
|
|
|
/** Writes 32 bits in little endian order */
|
|
static inline void SetDWLE (void *p, uint32_t dw)
|
|
{
|
|
#ifdef WORDS_BIGENDIAN
|
|
dw = bswap32 (dw);
|
|
#endif
|
|
memcpy (p, &dw, sizeof (dw));
|
|
}
|
|
|
|
/** Writes 64 bits in little endian order */
|
|
static inline void SetQWLE (void *p, uint64_t qw)
|
|
{
|
|
#ifdef WORDS_BIGENDIAN
|
|
qw = bswap64 (qw);
|
|
#endif
|
|
memcpy (p, &qw, sizeof (qw));
|
|
}
|
|
|
|
/* */
|
|
#define VLC_UNUSED(x) (void)(x)
|
|
|
|
/* Stuff defined in src/extras/libc.c */
|
|
|
|
#if defined(_WIN32)
|
|
/* several type definitions */
|
|
# if defined( __MINGW32__ )
|
|
# if !defined( _OFF_T_ )
|
|
typedef long long _off_t;
|
|
typedef _off_t off_t;
|
|
# define _OFF_T_
|
|
# else
|
|
# ifdef off_t
|
|
# undef off_t
|
|
# endif
|
|
# define off_t long long
|
|
# endif
|
|
# endif
|
|
|
|
# ifndef O_NONBLOCK
|
|
# define O_NONBLOCK 0
|
|
# endif
|
|
|
|
# include <tchar.h>
|
|
#endif /* _WIN32 */
|
|
|
|
typedef struct {
|
|
unsigned num, den;
|
|
} vlc_rational_t;
|
|
|
|
VLC_API bool vlc_ureduce( unsigned *, unsigned *, uint64_t, uint64_t, uint64_t );
|
|
|
|
#define container_of(ptr, type, member) \
|
|
((type *)(((char *)(ptr)) - offsetof(type, member)))
|
|
|
|
VLC_USED VLC_MALLOC
|
|
static inline void *vlc_alloc(size_t count, size_t size)
|
|
{
|
|
return mul_overflow(count, size, &size) ? NULL : malloc(size);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* I18n stuff
|
|
*****************************************************************************/
|
|
VLC_API char *vlc_gettext( const char *msgid ) VLC_FORMAT_ARG(1);
|
|
VLC_API char *vlc_ngettext( const char *s, const char *p, unsigned long n ) VLC_FORMAT_ARG(1) VLC_FORMAT_ARG(2);
|
|
|
|
#define vlc_pgettext( ctx, id ) \
|
|
vlc_pgettext_aux( ctx "\004" id, id )
|
|
|
|
VLC_FORMAT_ARG(2)
|
|
static inline const char *vlc_pgettext_aux( const char *ctx, const char *id )
|
|
{
|
|
const char *tr = vlc_gettext( ctx );
|
|
return (tr == ctx) ? id : tr;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Loosy memory allocation functions. Do not use in new code.
|
|
*****************************************************************************/
|
|
static inline void *xmalloc(size_t len)
|
|
{
|
|
void *ptr = malloc(len);
|
|
if (unlikely(ptr == NULL && len > 0))
|
|
abort();
|
|
return ptr;
|
|
}
|
|
|
|
static inline void *xrealloc(void *ptr, size_t len)
|
|
{
|
|
void *nptr = realloc(ptr, len);
|
|
if (unlikely(nptr == NULL && len > 0))
|
|
abort();
|
|
return nptr;
|
|
}
|
|
|
|
static inline void *xcalloc(size_t n, size_t size)
|
|
{
|
|
void *ptr = calloc(n, size);
|
|
if (unlikely(ptr == NULL && (n > 0 || size > 0)))
|
|
abort ();
|
|
return ptr;
|
|
}
|
|
|
|
static inline char *xstrdup (const char *str)
|
|
{
|
|
char *ptr = strdup (str);
|
|
if (unlikely(ptr == NULL))
|
|
abort ();
|
|
return ptr;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* libvlc features
|
|
*****************************************************************************/
|
|
VLC_API const char * VLC_CompileBy( void ) VLC_USED;
|
|
VLC_API const char * VLC_CompileHost( void ) VLC_USED;
|
|
VLC_API const char * VLC_Compiler( void ) VLC_USED;
|
|
|
|
/*****************************************************************************
|
|
* Additional vlc stuff
|
|
*****************************************************************************/
|
|
#include "vlc_messages.h"
|
|
#include "vlc_objects.h"
|
|
#include "vlc_variables.h"
|
|
#include "vlc_main.h"
|
|
#include "vlc_configuration.h"
|
|
|
|
#if defined( _WIN32 ) || defined( __OS2__ )
|
|
# define DIR_SEP_CHAR '\\'
|
|
# define DIR_SEP "\\"
|
|
# define PATH_SEP_CHAR ';'
|
|
# define PATH_SEP ";"
|
|
#else
|
|
# define DIR_SEP_CHAR '/'
|
|
# define DIR_SEP "/"
|
|
# define PATH_SEP_CHAR ':'
|
|
# define PATH_SEP ":"
|
|
#endif
|
|
|
|
#define LICENSE_MSG \
|
|
_("This program comes with NO WARRANTY, to the extent permitted by " \
|
|
"law.\nYou may redistribute it under the terms of the GNU General " \
|
|
"Public License;\nsee the file named COPYING for details.\n" \
|
|
"Written by the VideoLAN team; see the AUTHORS file.\n")
|
|
|
|
#endif /* !VLC_COMMON_H */
|