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  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 "internal.h"
  29. #include "dv.h"
  30.  
  31. /* isom.c */
  32. extern const AVCodecTag ff_mp4_obj_type[];
  33. extern const AVCodecTag ff_codec_movvideo_tags[];
  34. extern const AVCodecTag ff_codec_movaudio_tags[];
  35. extern const AVCodecTag ff_codec_movsubtitle_tags[];
  36.  
  37. int ff_mov_iso639_to_lang(const char lang[4], int mp4);
  38. int ff_mov_lang_to_iso639(unsigned code, char to[4]);
  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 MOVStts {
  46.     int count;
  47.     int duration;
  48. } MOVStts;
  49.  
  50. typedef struct MOVStsc {
  51.     int first;
  52.     int count;
  53.     int id;
  54. } MOVStsc;
  55.  
  56. typedef struct MOVDref {
  57.     uint32_t type;
  58.     char *path;
  59.     char *dir;
  60.     char volume[28];
  61.     char filename[64];
  62.     int16_t nlvl_to, nlvl_from;
  63. } MOVDref;
  64.  
  65. typedef struct MOVAtom {
  66.     uint32_t type;
  67.     int64_t size; /* total size (excluding the size and type fields) */
  68. } MOVAtom;
  69.  
  70. struct MOVParseTableEntry;
  71.  
  72. typedef struct MOVFragment {
  73.     unsigned track_id;
  74.     uint64_t base_data_offset;
  75.     uint64_t moof_offset;
  76.     unsigned stsd_id;
  77.     unsigned duration;
  78.     unsigned size;
  79.     unsigned flags;
  80. } MOVFragment;
  81.  
  82. typedef struct MOVTrackExt {
  83.     unsigned track_id;
  84.     unsigned stsd_id;
  85.     unsigned duration;
  86.     unsigned size;
  87.     unsigned flags;
  88. } MOVTrackExt;
  89.  
  90. typedef struct MOVSbgp {
  91.     unsigned int count;
  92.     unsigned int index;
  93. } MOVSbgp;
  94.  
  95. typedef struct MOVStreamContext {
  96.     AVIOContext *pb;
  97.     int pb_is_copied;
  98.     int ffindex;          ///< AVStream index
  99.     int next_chunk;
  100.     unsigned int chunk_count;
  101.     int64_t *chunk_offsets;
  102.     unsigned int stts_count;
  103.     MOVStts *stts_data;
  104.     unsigned int ctts_count;
  105.     MOVStts *ctts_data;
  106.     unsigned int stsc_count;
  107.     MOVStsc *stsc_data;
  108.     unsigned int stps_count;
  109.     unsigned *stps_data;  ///< partial sync sample for mpeg-2 open gop
  110.     int ctts_index;
  111.     int ctts_sample;
  112.     unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
  113.     unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
  114.     unsigned int sample_count;
  115.     int *sample_sizes;
  116.     int keyframe_absent;
  117.     unsigned int keyframe_count;
  118.     int *keyframes;
  119.     int time_scale;
  120.     int64_t empty_duration; ///< empty duration of the first edit list entry
  121.     int64_t start_time;   ///< start time of the media
  122.     int64_t time_offset;  ///< time offset of the edit list entries
  123.     int current_sample;
  124.     unsigned int bytes_per_frame;
  125.     unsigned int samples_per_frame;
  126.     int dv_audio_container;
  127.     int pseudo_stream_id; ///< -1 means demux all ids
  128.     int16_t audio_cid;    ///< stsd audio compression id
  129.     unsigned drefs_count;
  130.     MOVDref *drefs;
  131.     int dref_id;
  132.     int timecode_track;
  133.     int wrong_dts;        ///< dts are wrong due to huge ctts offset (iMovie files)
  134.     int width;            ///< tkhd width
  135.     int height;           ///< tkhd height
  136.     int dts_shift;        ///< dts shift when ctts is negative
  137.     uint32_t palette[256];
  138.     int has_palette;
  139.     int64_t data_size;
  140.     uint32_t tmcd_flags;  ///< tmcd track flags
  141.     int64_t track_end;    ///< used for dts generation in fragmented movie files
  142.     int start_pad;        ///< amount of samples to skip due to enc-dec delay
  143.     unsigned int rap_group_count;
  144.     MOVSbgp *rap_group;
  145. } MOVStreamContext;
  146.  
  147. typedef struct MOVContext {
  148.     AVClass *avclass;
  149.     AVFormatContext *fc;
  150.     int time_scale;
  151.     int64_t duration;     ///< duration of the longest track
  152.     int found_moov;       ///< 'moov' atom has been found
  153.     int found_mdat;       ///< 'mdat' atom has been found
  154.     DVDemuxContext *dv_demux;
  155.     AVFormatContext *dv_fctx;
  156.     int isom;             ///< 1 if file is ISO Media (mp4/3gp)
  157.     MOVFragment fragment; ///< current fragment in moof atom
  158.     MOVTrackExt *trex_data;
  159.     unsigned trex_count;
  160.     int itunes_metadata;  ///< metadata are itunes style
  161.     int chapter_track;
  162.     int use_absolute_path;
  163.     int ignore_editlist;
  164.     int64_t next_root_atom; ///< offset of the next root atom
  165.     int *bitrates;          ///< bitrates read before streams creation
  166.     int bitrates_count;
  167. } MOVContext;
  168.  
  169. int ff_mp4_read_descr_len(AVIOContext *pb);
  170. int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
  171. int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
  172. void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
  173.  
  174. #define MP4ODescrTag                    0x01
  175. #define MP4IODescrTag                   0x02
  176. #define MP4ESDescrTag                   0x03
  177. #define MP4DecConfigDescrTag            0x04
  178. #define MP4DecSpecificDescrTag          0x05
  179. #define MP4SLDescrTag                   0x06
  180.  
  181. #define MOV_TFHD_BASE_DATA_OFFSET       0x01
  182. #define MOV_TFHD_STSD_ID                0x02
  183. #define MOV_TFHD_DEFAULT_DURATION       0x08
  184. #define MOV_TFHD_DEFAULT_SIZE           0x10
  185. #define MOV_TFHD_DEFAULT_FLAGS          0x20
  186. #define MOV_TFHD_DURATION_IS_EMPTY  0x010000
  187.  
  188. #define MOV_TRUN_DATA_OFFSET            0x01
  189. #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04
  190. #define MOV_TRUN_SAMPLE_DURATION       0x100
  191. #define MOV_TRUN_SAMPLE_SIZE           0x200
  192. #define MOV_TRUN_SAMPLE_FLAGS          0x400
  193. #define MOV_TRUN_SAMPLE_CTS            0x800
  194.  
  195. #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
  196. #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000
  197. #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000
  198. #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000
  199. #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000
  200. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000
  201.  
  202. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000
  203. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000
  204.  
  205. #define MOV_TKHD_FLAG_ENABLED       0x0001
  206. #define MOV_TKHD_FLAG_IN_MOVIE      0x0002
  207. #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004
  208. #define MOV_TKHD_FLAG_IN_POSTER     0x0008
  209.  
  210. int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
  211. enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
  212.  
  213. int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
  214. void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
  215.  
  216. #endif /* AVFORMAT_ISOM_H */
  217.