/***************************************************************************** * vlc_es.h: Elementary stream formats descriptions ***************************************************************************** * Copyright (C) 1999-2001 VideoLAN * $Id$ * * Authors: Laurent Aimar * * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. *****************************************************************************/ #ifndef _VLC_ES_H #define _VLC_ES_H 1 /** * \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_dummy; /**< to keep the compatibility with ffmpeg's palette */ uint8_t palette[256][4]; /**< 4-byte RGBA/YUVA palette */ }; /** * 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) */ int i_channels; int i_blockalign; int i_bitspersample; }; /** * 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_frame_rate; /**< frame rate numerator */ unsigned int i_frame_rate_base; /**< frame rate denominator */ int i_rmask, i_rgmask, i_bmask; /**< color masks for RGB chroma */ video_palette_t *p_palette; /**< video palette from demuxer */ }; /** * subtitles format description */ struct subs_format_t { char *psz_encoding; struct { /* FIXME */ uint32_t palette[16+1]; } spu; struct { int i_id; } dvb; }; /** * ES definition */ struct es_format_t { int i_cat; vlc_fourcc_t i_codec; int i_id; /* -1: let the core mark the right id >=0: valid id */ int i_group; /* -1 : standalone >= 0 then a "group" (program) is created for each value */ int i_priority; /* -2 : mean not selectable by the users -1 : mean not selected by default even when no other stream >=0: priority */ char *psz_language; char *psz_description; audio_format_t audio; video_format_t video; subs_format_t subs; int i_bitrate; vlc_bool_t b_packetized; /* wether the data is packetized (ie. not truncated) */ int i_extra; void *p_extra; }; /* ES Categories */ #define UNKNOWN_ES 0x00 #define VIDEO_ES 0x01 #define AUDIO_ES 0x02 #define SPU_ES 0x03 #define NAV_ES 0x04 static inline void es_format_Init( es_format_t *fmt, int i_cat, vlc_fourcc_t i_codec ) { fmt->i_cat = i_cat; fmt->i_codec = i_codec; fmt->i_id = -1; fmt->i_group = 0; fmt->i_priority = 0; fmt->psz_language = NULL; fmt->psz_description = NULL; memset( &fmt->audio, 0, sizeof(audio_format_t) ); memset( &fmt->video, 0, sizeof(video_format_t) ); memset( &fmt->subs, 0, sizeof(subs_format_t) ); fmt->b_packetized = VLC_TRUE; fmt->i_bitrate = 0; fmt->i_extra = 0; fmt->p_extra = NULL; } static inline void es_format_Copy( es_format_t *dst, es_format_t *src ) { memcpy( dst, src, sizeof( es_format_t ) ); if( src->psz_language ) dst->psz_language = strdup( src->psz_language ); if( src->psz_description ) dst->psz_description = strdup( src->psz_description ); if( src->i_extra > 0 ) { dst->i_extra = src->i_extra; dst->p_extra = malloc( src->i_extra ); memcpy( dst->p_extra, src->p_extra, src->i_extra ); } else { dst->i_extra = 0; dst->p_extra = NULL; } if( src->subs.psz_encoding ) dst->subs.psz_encoding = strdup( src->subs.psz_encoding ); if( src->video.p_palette ) { dst->video.p_palette = (video_palette_t*)malloc( sizeof( video_palette_t ) ); memcpy( dst->video.p_palette, src->video.p_palette, sizeof( video_palette_t ) ); } } static inline void es_format_Clean( es_format_t *fmt ) { if( fmt->psz_language ) free( fmt->psz_language ); fmt->psz_language = NULL; if( fmt->psz_description ) free( fmt->psz_description ); fmt->psz_description = NULL; if( fmt->i_extra > 0 ) free( fmt->p_extra ); fmt->i_extra = 0; fmt->p_extra = NULL; if( fmt->video.p_palette ) free( fmt->video.p_palette ); fmt->video.p_palette = NULL; if( fmt->subs.psz_encoding ) free( fmt->subs.psz_encoding ); fmt->subs.psz_encoding = NULL; } #endif