mirror of https://code.videolan.org/videolan/vlc
253 lines
8.0 KiB
C
253 lines
8.0 KiB
C
/*****************************************************************************
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* vlc_es.h: Elementary stream formats descriptions
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*****************************************************************************
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* Copyright (C) 1999-2001 the VideoLAN team
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* $Id$
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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#ifndef _VLC_ES_H
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#define _VLC_ES_H 1
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/**
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* \file
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* This file defines the elementary streams format types
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*/
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/**
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* video palette data
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* \see video_format_t
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* \see subs_format_t
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*/
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struct video_palette_t
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{
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int i_entries; /**< to keep the compatibility with ffmpeg's palette */
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uint8_t palette[256][4]; /**< 4-byte RGBA/YUVA palette */
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};
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/**
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* audio format description
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*/
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struct audio_format_t
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{
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vlc_fourcc_t i_format; /**< audio format fourcc */
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unsigned int i_rate; /**< audio sample-rate */
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/* Describes the channels configuration of the samples (ie. number of
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* channels which are available in the buffer, and positions). */
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uint32_t i_physical_channels;
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/* Describes from which original channels, before downmixing, the
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* buffer is derived. */
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uint32_t i_original_channels;
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/* Optional - for A/52, SPDIF and DTS types : */
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/* Bytes used by one compressed frame, depends on bitrate. */
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unsigned int i_bytes_per_frame;
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/* Number of sampleframes contained in one compressed frame. */
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unsigned int i_frame_length;
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/* Please note that it may be completely arbitrary - buffers are not
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* obliged to contain a integral number of so-called "frames". It's
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* just here for the division :
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* buffer_size = i_nb_samples * i_bytes_per_frame / i_frame_length
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*/
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/* FIXME ? (used by the codecs) */
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int i_channels;
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int i_blockalign;
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int i_bitspersample;
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};
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#ifdef WORDS_BIGENDIAN
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# define AUDIO_FMT_S16_NE VLC_FOURCC('s','1','6','b')
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# define AUDIO_FMT_U16_NE VLC_FOURCC('u','1','6','b')
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#else
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# define AUDIO_FMT_S16_NE VLC_FOURCC('s','1','6','l')
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# define AUDIO_FMT_U16_NE VLC_FOURCC('u','1','6','l')
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#endif
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/**
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* video format description
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*/
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struct video_format_t
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{
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vlc_fourcc_t i_chroma; /**< picture chroma */
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unsigned int i_aspect; /**< aspect ratio */
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unsigned int i_width; /**< picture width */
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unsigned int i_height; /**< picture height */
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unsigned int i_x_offset; /**< start offset of visible area */
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unsigned int i_y_offset; /**< start offset of visible area */
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unsigned int i_visible_width; /**< width of visible area */
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unsigned int i_visible_height; /**< height of visible area */
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unsigned int i_bits_per_pixel; /**< number of bits per pixel */
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unsigned int i_sar_num; /**< sample/pixel aspect ratio */
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unsigned int i_sar_den;
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unsigned int i_frame_rate; /**< frame rate numerator */
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unsigned int i_frame_rate_base; /**< frame rate denominator */
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int i_rmask, i_gmask, i_bmask; /**< color masks for RGB chroma */
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video_palette_t *p_palette; /**< video palette from demuxer */
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};
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/**
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* subtitles format description
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*/
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struct subs_format_t
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{
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/* the character encoding of the text of the subtitle.
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* all gettext recognized shorts can be used */
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char *psz_encoding;
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int i_x_origin; /**< x coordinate of the subtitle. 0 = left */
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int i_y_origin; /**< y coordinate of the subtitle. 0 = top */
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struct
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{
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/* */
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uint32_t palette[16+1];
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/* the width of the original movie the spu was extracted from */
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int i_original_frame_width;
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/* the height of the original movie the spu was extracted from */
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int i_original_frame_height;
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} spu;
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struct
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{
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int i_id;
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} dvb;
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};
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/**
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* ES definition
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*/
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struct es_format_t
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{
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int i_cat;
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vlc_fourcc_t i_codec;
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int i_id; /* -1: let the core mark the right id
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>=0: valid id */
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int i_group; /* -1 : standalone
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>= 0 then a "group" (program) is created
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for each value */
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int i_priority; /* -2 : mean not selectable by the users
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-1 : mean not selected by default even
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when no other stream
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>=0: priority */
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char *psz_language;
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char *psz_description;
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audio_format_t audio;
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video_format_t video;
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subs_format_t subs;
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unsigned int i_bitrate;
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vlc_bool_t b_packetized; /* wether the data is packetized
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(ie. not truncated) */
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int i_extra;
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void *p_extra;
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};
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/* ES Categories */
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#define UNKNOWN_ES 0x00
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#define VIDEO_ES 0x01
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#define AUDIO_ES 0x02
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#define SPU_ES 0x03
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#define NAV_ES 0x04
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static inline void es_format_Init( es_format_t *fmt,
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int i_cat, vlc_fourcc_t i_codec )
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{
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fmt->i_cat = i_cat;
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fmt->i_codec = i_codec;
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fmt->i_id = -1;
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fmt->i_group = 0;
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fmt->i_priority = 0;
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fmt->psz_language = NULL;
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fmt->psz_description = NULL;
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memset( &fmt->audio, 0, sizeof(audio_format_t) );
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memset( &fmt->video, 0, sizeof(video_format_t) );
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memset( &fmt->subs, 0, sizeof(subs_format_t) );
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fmt->b_packetized = VLC_TRUE;
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fmt->i_bitrate = 0;
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fmt->i_extra = 0;
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fmt->p_extra = NULL;
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}
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static inline void es_format_Copy( es_format_t *dst, es_format_t *src )
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{
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memcpy( dst, src, sizeof( es_format_t ) );
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if( src->psz_language )
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dst->psz_language = strdup( src->psz_language );
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if( src->psz_description )
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dst->psz_description = strdup( src->psz_description );
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if( src->i_extra > 0 )
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{
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dst->i_extra = src->i_extra;
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dst->p_extra = malloc( src->i_extra );
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memcpy( dst->p_extra, src->p_extra, src->i_extra );
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}
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else
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{
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dst->i_extra = 0;
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dst->p_extra = NULL;
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}
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if( src->subs.psz_encoding )
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dst->subs.psz_encoding = strdup( src->subs.psz_encoding );
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if( src->video.p_palette )
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{
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dst->video.p_palette =
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(video_palette_t*)malloc( sizeof( video_palette_t ) );
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memcpy( dst->video.p_palette, src->video.p_palette,
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sizeof( video_palette_t ) );
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}
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}
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static inline void es_format_Clean( es_format_t *fmt )
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{
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if( fmt->psz_language ) free( fmt->psz_language );
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fmt->psz_language = NULL;
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if( fmt->psz_description ) free( fmt->psz_description );
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fmt->psz_description = NULL;
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if( fmt->i_extra > 0 ) free( fmt->p_extra );
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fmt->i_extra = 0; fmt->p_extra = NULL;
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if( fmt->video.p_palette ) free( fmt->video.p_palette );
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fmt->video.p_palette = NULL;
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if( fmt->subs.psz_encoding ) free( fmt->subs.psz_encoding );
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fmt->subs.psz_encoding = NULL;
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}
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#endif
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