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https://git.ffmpeg.org/ffmpeg.git
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139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/*
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* ISO Media common code
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* copyright (c) 2001 Fabrice Bellard
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* copyright (c) 2002 Francois Revol <revol@free.fr>
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* copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* 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
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFORMAT_ISOM_H
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#define AVFORMAT_ISOM_H
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#include "avio.h"
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#include "riff.h"
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#include "dv.h"
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/* isom.c */
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extern const AVCodecTag ff_mp4_obj_type[];
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extern const AVCodecTag codec_movvideo_tags[];
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extern const AVCodecTag codec_movaudio_tags[];
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extern const AVCodecTag ff_codec_movsubtitle_tags[];
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int ff_mov_iso639_to_lang(const char *lang, int mp4);
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int ff_mov_lang_to_iso639(unsigned code, char *to);
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/* the QuickTime file format is quite convoluted...
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* it has lots of index tables, each indexing something in another one...
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* Here we just use what is needed to read the chunks
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*/
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typedef struct {
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int count;
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int duration;
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} MOVStts;
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typedef struct {
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int first;
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int count;
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int id;
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} MOVStsc;
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typedef struct {
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uint32_t type;
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char *path;
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} MOVDref;
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typedef struct {
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uint32_t type;
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int64_t offset;
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int64_t size; /* total size (excluding the size and type fields) */
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} MOVAtom;
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struct MOVParseTableEntry;
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typedef struct {
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unsigned track_id;
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uint64_t base_data_offset;
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uint64_t moof_offset;
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVFragment;
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typedef struct {
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unsigned track_id;
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVTrackExt;
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typedef struct MOVStreamContext {
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ByteIOContext *pb;
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int ffindex; /* the ffmpeg stream id */
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int next_chunk;
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unsigned int chunk_count;
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int64_t *chunk_offsets;
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unsigned int stts_count;
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MOVStts *stts_data;
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unsigned int ctts_count;
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MOVStts *ctts_data;
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unsigned int stsc_count;
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MOVStsc *stsc_data;
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int ctts_index;
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int ctts_sample;
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unsigned int sample_size;
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unsigned int sample_count;
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int *sample_sizes;
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unsigned int keyframe_count;
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int *keyframes;
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int time_scale;
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int time_rate;
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int time_offset; ///< time offset of the first edit list entry
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int current_sample;
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unsigned int bytes_per_frame;
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unsigned int samples_per_frame;
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int dv_audio_container;
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int pseudo_stream_id; ///< -1 means demux all ids
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int16_t audio_cid; ///< stsd audio compression id
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unsigned drefs_count;
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MOVDref *drefs;
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int dref_id;
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int wrong_dts; ///< dts are wrong due to negative ctts
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int width; ///< tkhd width
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int height; ///< tkhd height
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} MOVStreamContext;
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typedef struct MOVContext {
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AVFormatContext *fc;
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int time_scale;
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int64_t duration; /* duration of the longest track */
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int found_moov; /* when both 'moov' and 'mdat' sections has been found */
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int found_mdat; /* we suppose we have enough data to read the file */
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DVDemuxContext *dv_demux;
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AVFormatContext *dv_fctx;
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int isom; /* 1 if file is ISO Media (mp4/3gp) */
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MOVFragment fragment; ///< current fragment in moof atom
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MOVTrackExt *trex_data;
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unsigned trex_count;
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int itunes_metadata; ///< metadata are itunes style
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} MOVContext;
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#endif /* AVFORMAT_ISOM_H */
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