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新增视频流播放
2020-04-22 06:36:41 +00:00
/*****************************************************************************
* vlc_es.h: Elementary stream formats descriptions
*****************************************************************************
* Copyright (C) 1999-2012 VLC authors and VideoLAN
* $Id: 8db588494350b40b0f9225df00234f44189c5072 $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program 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.
*
* This program 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_ES_H
#define VLC_ES_H 1
#include <vlc_fourcc.h>
#include <vlc_text_style.h>
/**
* \file
* This file defines the elementary streams format types
*/
/**
* video palette data
* \see video_format_t
* \see subs_format_t
*/
#define VIDEO_PALETTE_COLORS_MAX 256
struct video_palette_t
{
int i_entries; /**< to keep the compatibility with libavcodec's palette */
uint8_t palette[VIDEO_PALETTE_COLORS_MAX][4]; /**< 4-byte RGBA/YUVA palette */
};
/**
* audio replay gain description
*/
#define AUDIO_REPLAY_GAIN_MAX (2)
#define AUDIO_REPLAY_GAIN_TRACK (0)
#define AUDIO_REPLAY_GAIN_ALBUM (1)
typedef struct
{
/* true if we have the peak value */
bool pb_peak[AUDIO_REPLAY_GAIN_MAX];
/* peak value where 1.0 means full sample value */
float pf_peak[AUDIO_REPLAY_GAIN_MAX];
/* true if we have the gain value */
bool pb_gain[AUDIO_REPLAY_GAIN_MAX];
/* gain value in dB */
float pf_gain[AUDIO_REPLAY_GAIN_MAX];
} audio_replay_gain_t;
/**
* audio format description
*/
struct audio_format_t
{
vlc_fourcc_t i_format; /**< audio format fourcc */
unsigned int i_rate; /**< audio sample-rate */
/* Describes the channels configuration of the samples (ie. number of
* channels which are available in the buffer, and positions). */
uint16_t i_physical_channels;
/* Describes from which original channels, before downmixing, the
* buffer is derived. */
uint32_t i_original_channels;
/* Optional - for A/52, SPDIF and DTS types : */
/* Bytes used by one compressed frame, depends on bitrate. */
unsigned int i_bytes_per_frame;
/* Number of sampleframes contained in one compressed frame. */
unsigned int i_frame_length;
/* Please note that it may be completely arbitrary - buffers are not
* obliged to contain a integral number of so-called "frames". It's
* just here for the division :
* buffer_size = i_nb_samples * i_bytes_per_frame / i_frame_length
*/
/* FIXME ? (used by the codecs) */
unsigned i_bitspersample;
unsigned i_blockalign;
uint8_t i_channels; /* must be <=32 */
};
/* Values available for audio channels */
#define AOUT_CHAN_CENTER 0x1
#define AOUT_CHAN_LEFT 0x2
#define AOUT_CHAN_RIGHT 0x4
#define AOUT_CHAN_REARCENTER 0x10
#define AOUT_CHAN_REARLEFT 0x20
#define AOUT_CHAN_REARRIGHT 0x40
#define AOUT_CHAN_MIDDLELEFT 0x100
#define AOUT_CHAN_MIDDLERIGHT 0x200
#define AOUT_CHAN_LFE 0x1000
#define AOUT_CHANS_FRONT (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)
#define AOUT_CHANS_MIDDLE (AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT)
#define AOUT_CHANS_REAR (AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT)
#define AOUT_CHANS_CENTER (AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER)
#define AOUT_CHANS_STEREO AOUT_CHANS_2_0
#define AOUT_CHANS_2_0 (AOUT_CHANS_FRONT)
#define AOUT_CHANS_2_1 (AOUT_CHANS_FRONT | AOUT_CHAN_LFE)
#define AOUT_CHANS_3_0 (AOUT_CHANS_FRONT | AOUT_CHAN_CENTER)
#define AOUT_CHANS_3_1 (AOUT_CHANS_3_0 | AOUT_CHAN_LFE)
#define AOUT_CHANS_4_0 (AOUT_CHANS_FRONT | AOUT_CHANS_REAR)
#define AOUT_CHANS_4_1 (AOUT_CHANS_4_0 | AOUT_CHAN_LFE)
#define AOUT_CHANS_5_0 (AOUT_CHANS_4_0 | AOUT_CHAN_CENTER)
#define AOUT_CHANS_5_1 (AOUT_CHANS_5_0 | AOUT_CHAN_LFE)
#define AOUT_CHANS_6_0 (AOUT_CHANS_4_0 | AOUT_CHANS_MIDDLE)
#define AOUT_CHANS_7_0 (AOUT_CHANS_6_0 | AOUT_CHAN_CENTER)
#define AOUT_CHANS_7_1 (AOUT_CHANS_5_1 | AOUT_CHANS_MIDDLE)
#define AOUT_CHANS_8_1 (AOUT_CHANS_7_1 | AOUT_CHAN_REARCENTER)
#define AOUT_CHANS_4_0_MIDDLE (AOUT_CHANS_FRONT | AOUT_CHANS_MIDDLE)
#define AOUT_CHANS_4_CENTER_REAR (AOUT_CHANS_FRONT | AOUT_CHANS_CENTER)
#define AOUT_CHANS_5_0_MIDDLE (AOUT_CHANS_4_0_MIDDLE | AOUT_CHAN_CENTER)
#define AOUT_CHANS_6_1_MIDDLE (AOUT_CHANS_5_0_MIDDLE | AOUT_CHAN_REARCENTER | AOUT_CHAN_LFE)
/* Values available for original channels only */
#define AOUT_CHAN_DOLBYSTEREO 0x10000
#define AOUT_CHAN_DUALMONO 0x20000
#define AOUT_CHAN_REVERSESTEREO 0x40000
#define AOUT_CHAN_PHYSMASK 0xFFFF
#define AOUT_CHAN_MAX 9
/**
* Picture orientation.
*/
typedef enum video_orientation_t
{
ORIENT_TOP_LEFT = 0, /**< Top line represents top, left column left. */
ORIENT_TOP_RIGHT, /**< Flipped horizontally */
ORIENT_BOTTOM_LEFT, /**< Flipped vertically */
ORIENT_BOTTOM_RIGHT, /**< Rotated 180 degrees */
ORIENT_LEFT_TOP, /**< Transposed */
ORIENT_LEFT_BOTTOM, /**< Rotated 90 degrees clockwise */
ORIENT_RIGHT_TOP, /**< Rotated 90 degrees anti-clockwise */
ORIENT_RIGHT_BOTTOM, /**< Anti-transposed */
ORIENT_NORMAL = ORIENT_TOP_LEFT,
ORIENT_TRANSPOSED = ORIENT_LEFT_TOP,
ORIENT_ANTI_TRANSPOSED = ORIENT_RIGHT_BOTTOM,
ORIENT_HFLIPPED = ORIENT_TOP_RIGHT,
ORIENT_VFLIPPED = ORIENT_BOTTOM_LEFT,
ORIENT_ROTATED_180 = ORIENT_BOTTOM_RIGHT,
ORIENT_ROTATED_270 = ORIENT_LEFT_BOTTOM,
ORIENT_ROTATED_90 = ORIENT_RIGHT_TOP,
} video_orientation_t;
/** Convert EXIF orientation to enum video_orientation_t */
#define ORIENT_FROM_EXIF(exif) ((0x01324675U >> (4 * ((exif) - 1))) & 7)
/** Convert enum video_orientation_t to EXIF */
#define ORIENT_TO_EXIF(orient) ((0x12435867U >> (4 * (orient))) & 15)
/** If the orientation is natural or mirrored */
#define ORIENT_IS_MIRROR(orient) parity(orient)
/** If the orientation swaps dimensions */
#define ORIENT_IS_SWAP(orient) (((orient) & 4) != 0)
/** Applies horizontal flip to an orientation */
#define ORIENT_HFLIP(orient) ((orient) ^ 1)
/** Applies vertical flip to an orientation */
#define ORIENT_VFLIP(orient) ((orient) ^ 2)
/** Applies horizontal flip to an orientation */
#define ORIENT_ROTATE_180(orient) ((orient) ^ 3)
typedef enum video_transform_t
{
TRANSFORM_IDENTITY = ORIENT_NORMAL,
TRANSFORM_HFLIP = ORIENT_HFLIPPED,
TRANSFORM_VFLIP = ORIENT_VFLIPPED,
TRANSFORM_R180 = ORIENT_ROTATED_180,
TRANSFORM_R270 = ORIENT_ROTATED_270,
TRANSFORM_R90 = ORIENT_ROTATED_90,
TRANSFORM_TRANSPOSE = ORIENT_TRANSPOSED,
TRANSFORM_ANTI_TRANSPOSE = ORIENT_ANTI_TRANSPOSED
} video_transform_t;
/**
* video format description
*/
struct video_format_t
{
vlc_fourcc_t i_chroma; /**< picture chroma */
unsigned int i_width; /**< picture width */
unsigned int i_height; /**< picture height */
unsigned int i_x_offset; /**< start offset of visible area */
unsigned int i_y_offset; /**< start offset of visible area */
unsigned int i_visible_width; /**< width of visible area */
unsigned int i_visible_height; /**< height of visible area */
unsigned int i_bits_per_pixel; /**< number of bits per pixel */
unsigned int i_sar_num; /**< sample/pixel aspect ratio */
unsigned int i_sar_den;
unsigned int i_frame_rate; /**< frame rate numerator */
unsigned int i_frame_rate_base; /**< frame rate denominator */
uint32_t i_rmask, i_gmask, i_bmask; /**< color masks for RGB chroma */
int i_rrshift, i_lrshift;
int i_rgshift, i_lgshift;
int i_rbshift, i_lbshift;
video_palette_t *p_palette; /**< video palette from demuxer */
video_orientation_t orientation; /**< picture orientation */
};
/**
* Initialize a video_format_t structure with chroma 'i_chroma'
* \param p_src pointer to video_format_t structure
* \param i_chroma chroma value to use
*/
static inline void video_format_Init( video_format_t *p_src, vlc_fourcc_t i_chroma )
{
memset( p_src, 0, sizeof( video_format_t ) );
p_src->i_chroma = i_chroma;
p_src->i_sar_num = p_src->i_sar_den = 1;
p_src->p_palette = NULL;
}
/**
* Copy video_format_t including the palette
* \param p_dst video_format_t to copy to
* \param p_src video_format_t to copy from
*/
static inline int video_format_Copy( video_format_t *p_dst, const video_format_t *p_src )
{
memcpy( p_dst, p_src, sizeof( *p_dst ) );
if( p_src->p_palette )
{
p_dst->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
if( !p_dst->p_palette )
return VLC_ENOMEM;
memcpy( p_dst->p_palette, p_src->p_palette, sizeof( *p_dst->p_palette ) );
}
return VLC_SUCCESS;
}
/**
* Cleanup and free palette of this video_format_t
* \param p_src video_format_t structure to clean
*/
static inline void video_format_Clean( video_format_t *p_src )
{
free( p_src->p_palette );
memset( p_src, 0, sizeof( video_format_t ) );
p_src->p_palette = NULL;
}
/**
* It will fill up a video_format_t using the given arguments.
* Note that the video_format_t must already be initialized.
*/
VLC_API void video_format_Setup( video_format_t *, vlc_fourcc_t i_chroma,
int i_width, int i_height, int i_visible_width, int i_visible_height,
int i_sar_num, int i_sar_den );
/**
* It will copy the crop properties from a video_format_t to another.
*/
VLC_API void video_format_CopyCrop( video_format_t *, const video_format_t * );
/**
* It will compute the crop/ar properties when scaling.
*/
VLC_API void video_format_ScaleCropAr( video_format_t *, const video_format_t * );
/**
* This function "normalizes" the formats orientation, by switching the a/r according to the orientation,
* producing a format whose orientation is ORIENT_NORMAL. It makes a shallow copy (pallette is not alloc'ed).
*/
VLC_API void video_format_ApplyRotation(video_format_t * /*restrict*/ out,
const video_format_t *in);
/**
* This function applies the transform operation to fmt.
*/
VLC_API void video_format_TransformBy(video_format_t *fmt, video_transform_t transform);
/**
* This function applies the transforms necessary to fmt so that the resulting fmt
* has the dst_orientation.
*/
VLC_API void video_format_TransformTo(video_format_t *fmt, video_orientation_t dst_orientation);
/**
* Returns the operation required to transform src into dst.
*/
VLC_API video_transform_t video_format_GetTransform(video_orientation_t src, video_orientation_t dst);
/**
* This function will check if the first video format is similar
* to the second one.
*/
VLC_API bool video_format_IsSimilar( const video_format_t *, const video_format_t * );
/**
* It prints details about the given video_format_t
*/
VLC_API void video_format_Print( vlc_object_t *, const char *, const video_format_t * );
static inline video_transform_t transform_Inverse( video_transform_t transform )
{
switch ( transform ) {
case TRANSFORM_R90:
return TRANSFORM_R270;
case TRANSFORM_R270:
return TRANSFORM_R90;
default:
return transform;
}
}
/**
* subtitles format description
*/
struct subs_format_t
{
/* the character encoding of the text of the subtitle.
* all gettext recognized shorts can be used */
char *psz_encoding;
int i_x_origin; /**< x coordinate of the subtitle. 0 = left */
int i_y_origin; /**< y coordinate of the subtitle. 0 = top */
struct
{
/* */
uint32_t palette[16+1];
/* the width of the original movie the spu was extracted from */
int i_original_frame_width;
/* the height of the original movie the spu was extracted from */
int i_original_frame_height;
} spu;
struct
{
int i_id;
} dvb;
struct
{
int i_magazine;
int i_page;
} teletext;
text_style_t *p_style; /* Default styles to use */
};
/**
* ES language definition
*/
typedef struct extra_languages_t
{
char *psz_language;
char *psz_description;
} extra_languages_t;
/**
* ES format definition
*/
#define ES_PRIORITY_NOT_SELECTABLE -2
#define ES_PRIORITY_NOT_DEFAULTABLE -1
#define ES_PRIORITY_SELECTABLE_MIN 0
#define ES_PRIORITY_MIN ES_PRIORITY_NOT_SELECTABLE
struct es_format_t
{
int i_cat; /**< ES category @see es_format_category_e */
vlc_fourcc_t i_codec; /**< FOURCC value as used in vlc */
vlc_fourcc_t i_original_fourcc; /**< original FOURCC from the container */
int i_id; /**< es identifier, where means
-1: let the core mark the right id
>=0: valid id */
int i_group; /**< group identifier, where means:
-1 : standalone
>= 0 then a "group" (program) is created
for each value */
int i_priority; /**< priority, where means:
-2 : mean not selectable by the users
-1 : mean not selected by default even
when no other stream
>=0: priority */
char *psz_language; /**< human readible language name */
char *psz_description; /**< human readible description of language */
int i_extra_languages; /**< length in bytes of extra language data pointer */
extra_languages_t *p_extra_languages; /**< extra language data needed by some decoders */
audio_format_t audio; /**< description of audio format */
audio_replay_gain_t audio_replay_gain; /*< audio replay gain information */
video_format_t video; /**< description of video format */
subs_format_t subs; /**< description of subtitle format */
unsigned int i_bitrate; /**< bitrate of this ES */
int i_profile; /**< codec specific information (like real audio flavor, mpeg audio layer, h264 profile ...) */
int i_level; /**< codec specific information: indicates maximum restrictions on the stream (resolution, bitrate, codec features ...) */
bool b_packetized; /**< whether the data is packetized (ie. not truncated) */
int i_extra; /**< length in bytes of extra data pointer */
void *p_extra; /**< extra data needed by some decoders or muxers */
};
/** ES Categories */
enum es_format_category_e
{
UNKNOWN_ES = 0x00,
VIDEO_ES,
AUDIO_ES,
SPU_ES,
NAV_ES,
};
#define ES_CATEGORY_COUNT (NAV_ES + 1)
/**
* This function will fill all RGB shift from RGB masks.
*/
VLC_API void video_format_FixRgb( video_format_t * );
/**
* This function will initialize a es_format_t structure.
*/
VLC_API void es_format_Init( es_format_t *, int i_cat, vlc_fourcc_t i_codec );
/**
* This function will initialize a es_format_t structure from a video_format_t.
*/
VLC_API void es_format_InitFromVideo( es_format_t *, const video_format_t * );
/**
* This functions will copy a es_format_t.
*/
VLC_API int es_format_Copy( es_format_t *p_dst, const es_format_t *p_src );
/**
* This function will clean up a es_format_t and release all associated
* resources.
* You can call it multiple times on the same structure.
*/
VLC_API void es_format_Clean( es_format_t *fmt );
/**
* This function will check if the first ES format is similar
* to the second one.
*
* All descriptive fields are ignored.
*/
VLC_API bool es_format_IsSimilar( const es_format_t *, const es_format_t * );
#endif