libavformat/isom.h

   1 /*
   2  * ISO Media common code
   3  * copyright (c) 2001 Fabrice Bellard
   4  * copyright (c) 2002 Francois Revol <revol@free.fr>
   5  * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
   6  *
   7  * This file is part of FFmpeg.
   8  *
   9  * FFmpeg is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * FFmpeg is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with FFmpeg; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #ifndef AVFORMAT_ISOM_H
  25 #define AVFORMAT_ISOM_H
  26
  27 #include "avio.h"
  28 #include "riff.h"
  29 #include "dv.h"
  30
  31 /* isom.c */
  32 extern const AVCodecTag ff_mp4_obj_type[];
  33 extern const AVCodecTag codec_movvideo_tags[];
  34 extern const AVCodecTag codec_movaudio_tags[];
  35 extern const AVCodecTag ff_codec_movsubtitle_tags[];
  36
  37 int ff_mov_iso639_to_lang(const char *lang, int mp4);
  38 int ff_mov_lang_to_iso639(unsigned code, char *to);
  39
  40 /* the QuickTime file format is quite convoluted...
  41  * it has lots of index tables, each indexing something in another one...
  42  * Here we just use what is needed to read the chunks
  43  */
  44
  45 typedef struct {
  46     int count;
  47     int duration;
  48 } MOVStts;
  49
  50 typedef struct {
  51     int first;
  52     int count;
  53     int id;
  54 } MOVStsc;
  55
  56 typedef struct {
  57     uint32_t type;
  58     char *path;
  59 } MOVDref;
  60
  61 typedef struct {
  62     uint32_t type;
  63     int64_t offset;
  64     int64_t size; /* total size (excluding the size and type fields) */
  65 } MOVAtom;
  66
  67 struct MOVParseTableEntry;
  68
  69 typedef struct {
  70     unsigned track_id;
  71     uint64_t base_data_offset;
  72     uint64_t moof_offset;
  73     unsigned stsd_id;
  74     unsigned duration;
  75     unsigned size;
  76     unsigned flags;
  77 } MOVFragment;
  78
  79 typedef struct {
  80     unsigned track_id;
  81     unsigned stsd_id;
  82     unsigned duration;
  83     unsigned size;
  84     unsigned flags;
  85 } MOVTrackExt;
  86
  87 typedef struct MOVStreamContext {
  88     ByteIOContext *pb;
  89     int ffindex; /* the ffmpeg stream id */
  90     int next_chunk;
  91     unsigned int chunk_count;
  92     int64_t *chunk_offsets;
  93     unsigned int stts_count;
  94     MOVStts *stts_data;
  95     unsigned int ctts_count;
  96     MOVStts *ctts_data;
  97     unsigned int stsc_count;
  98     MOVStsc *stsc_data;
  99     int ctts_index;
 100     int ctts_sample;
 101     unsigned int sample_size;
 102     unsigned int sample_count;
 103     int *sample_sizes;
 104     unsigned int keyframe_count;
 105     int *keyframes;
 106     int time_scale;
 107     int time_rate;
 108     int time_offset; ///< time offset of the first edit list entry
 109     int current_sample;
 110     unsigned int bytes_per_frame;
 111     unsigned int samples_per_frame;
 112     int dv_audio_container;
 113     int pseudo_stream_id; ///< -1 means demux all ids
 114     int16_t audio_cid; ///< stsd audio compression id
 115     unsigned drefs_count;
 116     MOVDref *drefs;
 117     int dref_id;
 118     int wrong_dts; ///< dts are wrong due to negative ctts
 119     int width;  ///< tkhd width
 120     int height; ///< tkhd height
 121 } MOVStreamContext;
 122
 123 typedef struct MOVContext {
 124     AVFormatContext *fc;
 125     int time_scale;
 126     int64_t duration; /* duration of the longest track */
 127     int found_moov; /* when both 'moov' and 'mdat' sections has been found */
 128     int found_mdat; /* we suppose we have enough data to read the file */
 129     DVDemuxContext *dv_demux;
 130     AVFormatContext *dv_fctx;
 131     int isom; /* 1 if file is ISO Media (mp4/3gp) */
 132     MOVFragment fragment; ///< current fragment in moof atom
 133     MOVTrackExt *trex_data;
 134     unsigned trex_count;
 135     int itunes_metadata; ///< metadata are itunes style
 136 } MOVContext;
 137
 138 #endif /* AVFORMAT_ISOM_H */