vlc_es.h
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
资源大小:29949k
文件大小:10k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * vlc_es.h: Elementary stream formats descriptions
- *****************************************************************************
- * Copyright (C) 1999-2001 the VideoLAN team
- * $Id: 8744f20f733e05d67f7e20dff8926a62b23590b9 $
- *
- * 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 General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License for more details.
- *
- * You should have received a copy of the GNU 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
- /* FIXME: i'm not too sure about this include but it fixes compilation of
- * video chromas -- dionoea */
- #include "vlc_common.h"
- /**
- * file
- * This file defines the elementary streams format types
- */
- /**
- * video palette data
- * see video_format_t
- * see subs_format_t
- */
- struct video_palette_t
- {
- int i_entries; /**< to keep the compatibility with ffmpeg's palette */
- uint8_t palette[256][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). */
- uint32_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 */
- uint8_t i_flavor;
- };
- #ifdef WORDS_BIGENDIAN
- # define AUDIO_FMT_S16_NE VLC_FOURCC('s','1','6','b')
- # define AUDIO_FMT_U16_NE VLC_FOURCC('u','1','6','b')
- #else
- # define AUDIO_FMT_S16_NE VLC_FOURCC('s','1','6','l')
- # define AUDIO_FMT_U16_NE VLC_FOURCC('u','1','6','l')
- #endif
- /**
- * video format description
- */
- struct video_format_t
- {
- vlc_fourcc_t i_chroma; /**< picture chroma */
- unsigned int i_aspect; /**< aspect ratio */
- 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 */
- int 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 */
- };
- /**
- * 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, video_format_t *p_src )
- {
- memcpy( p_dst, p_src, sizeof( video_format_t ) );
- 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( video_palette_t ) );
- }
- 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;
- }
- /**
- * 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;
- };
- /**
- * ES language definition
- */
- typedef struct extra_languages_t
- {
- char *psz_language;
- char *psz_description;
- } extra_languages_t;
- /**
- * ES format definition
- */
- 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 */
- 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 */
- bool b_packetized; /**< wether 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 = 0x01,
- AUDIO_ES = 0x02,
- SPU_ES = 0x03,
- NAV_ES = 0x04,
- };
- /**
- * This function will fill all RGB shift from RGB masks.
- */
- VLC_EXPORT( void, video_format_FixRgb, ( video_format_t * ) );
- /**
- * This funtion will initialize a es_format_t structure.
- */
- VLC_EXPORT( void, es_format_Init, ( es_format_t *, int i_cat, vlc_fourcc_t i_codec ) );
- /**
- * This functions will copy a es_format_t.
- */
- VLC_EXPORT( 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 relasing all associated
- * resources.
- * You can call it multiple times on the same structure.
- */
- VLC_EXPORT( void, es_format_Clean, ( es_format_t *fmt ) );
- #endif