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ffmpeg / libavformat / isom.h @ 80b39e1c

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1 04d7f601 Diego Biurrun
/*
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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 "internal.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[4], int mp4);
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int ff_mov_lang_to_iso639(unsigned code, char to[4]);
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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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    char *dir;
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    char volume[28];
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    char filename[64];
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    int16_t nlvl_to, nlvl_from;
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} MOVDref;
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typedef struct {
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    uint32_t type;
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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;          ///< AVStream index
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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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    unsigned int stps_count;
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    unsigned *stps_data;  ///< partial sync sample for mpeg-2 open gop
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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_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 huge ctts offset (iMovie files)
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    int width;            ///< tkhd width
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    int height;           ///< tkhd height
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    int dts_shift;        ///< dts shift when ctts is negative
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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;       ///< 'moov' atom has been found
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    int found_mdat;       ///< 'mdat' atom has been found
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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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    int chapter_track;
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} MOVContext;
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int ff_mp4_read_descr_len(ByteIOContext *pb);
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int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom);
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enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
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#endif /* AVFORMAT_ISOM_H */