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FFmpeg/libavformat/isom.h

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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 MOVElst {

  57.     int64_t duration;

  58.     int64_t time;

  59.     float rate;

  60. } MOVElst;

  61. 

  62. typedef struct MOVDref {

  63.     uint32_t type;

  64.     char *path;

  65.     char *dir;

  66.     char volume[28];

  67.     char filename[64];

  68.     int16_t nlvl_to, nlvl_from;

  69. } MOVDref;

  70. 

  71. typedef struct MOVAtom {

  72.     uint32_t type;

  73.     int64_t size; /* total size (excluding the size and type fields) */

  74. } MOVAtom;

  75. 

  76. struct MOVParseTableEntry;

  77. 

  78. typedef struct MOVFragment {

  79.     unsigned track_id;

  80.     uint64_t base_data_offset;

  81.     uint64_t moof_offset;

  82.     uint64_t implicit_offset;

  83.     unsigned stsd_id;

  84.     unsigned duration;

  85.     unsigned size;

  86.     unsigned flags;

  87.     int64_t time;

  88. } MOVFragment;

  89. 

  90. typedef struct MOVTrackExt {

  91.     unsigned track_id;

  92.     unsigned stsd_id;

  93.     unsigned duration;

  94.     unsigned size;

  95.     unsigned flags;

  96. } MOVTrackExt;

  97. 

  98. typedef struct MOVSbgp {

  99.     unsigned int count;

  100.     unsigned int index;

  101. } MOVSbgp;

  102. 

  103. typedef struct MOVFragmentIndexItem {

  104.     int64_t moof_offset;

  105.     int64_t time;

  106. } MOVFragmentIndexItem;

  107. 

  108. typedef struct MOVFragmentIndex {

  109.     unsigned track_id;

  110.     unsigned item_count;

  111.     unsigned current_item;

  112.     MOVFragmentIndexItem *items;

  113. } MOVFragmentIndex;

  114. 

  115. typedef struct MOVStreamContext {

  116.     AVIOContext *pb;

  117.     int pb_is_copied;

  118.     int ffindex;          ///< AVStream index

  119.     int next_chunk;

  120.     unsigned int chunk_count;

  121.     int64_t *chunk_offsets;

  122.     unsigned int stts_count;

  123.     MOVStts *stts_data;

  124.     unsigned int ctts_count;

  125.     MOVStts *ctts_data;

  126.     unsigned int stsc_count;

  127.     MOVStsc *stsc_data;

  128.     unsigned int stps_count;

  129.     unsigned *stps_data;  ///< partial sync sample for mpeg-2 open gop

  130.     MOVElst *elst_data;

  131.     unsigned int elst_count;

  132.     int ctts_index;

  133.     int ctts_sample;

  134.     unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom

  135.     unsigned int stsz_sample_size; ///< always contains sample size from stsz atom

  136.     unsigned int sample_count;

  137.     int *sample_sizes;

  138.     int keyframe_absent;

  139.     unsigned int keyframe_count;

  140.     int *keyframes;

  141.     int time_scale;

  142.     int64_t time_offset;  ///< time offset of the edit list entries

  143.     int current_sample;

  144.     unsigned int bytes_per_frame;

  145.     unsigned int samples_per_frame;

  146.     int dv_audio_container;

  147.     int pseudo_stream_id; ///< -1 means demux all ids

  148.     int16_t audio_cid;    ///< stsd audio compression id

  149.     unsigned drefs_count;

  150.     MOVDref *drefs;

  151.     int dref_id;

  152.     int timecode_track;

  153.     int wrong_dts;        ///< dts are wrong due to huge ctts offset (iMovie files)

  154.     int width;            ///< tkhd width

  155.     int height;           ///< tkhd height

  156.     int dts_shift;        ///< dts shift when ctts is negative

  157.     uint32_t palette[256];

  158.     int has_palette;

  159.     int64_t data_size;

  160.     uint32_t tmcd_flags;  ///< tmcd track flags

  161.     int64_t track_end;    ///< used for dts generation in fragmented movie files

  162.     int start_pad;        ///< amount of samples to skip due to enc-dec delay

  163.     unsigned int rap_group_count;

  164.     MOVSbgp *rap_group;

  165. 

  166.     int nb_frames_for_fps;

  167.     int64_t duration_for_fps;

  168. 

  169.     int32_t *display_matrix;

  170. } MOVStreamContext;

  171. 

  172. typedef struct MOVContext {

  173.     const AVClass *class; ///< class for private options

  174.     AVFormatContext *fc;

  175.     int time_scale;

  176.     int64_t duration;     ///< duration of the longest track

  177.     int found_moov;       ///< 'moov' atom has been found

  178.     int found_mdat;       ///< 'mdat' atom has been found

  179.     DVDemuxContext *dv_demux;

  180.     AVFormatContext *dv_fctx;

  181.     int isom;             ///< 1 if file is ISO Media (mp4/3gp)

  182.     MOVFragment fragment; ///< current fragment in moof atom

  183.     MOVTrackExt *trex_data;

  184.     unsigned trex_count;

  185.     int itunes_metadata;  ///< metadata are itunes style

  186.     int chapter_track;

  187.     int use_absolute_path;

  188.     int ignore_editlist;

  189.     int64_t next_root_atom; ///< offset of the next root atom

  190.     int export_all;

  191.     int export_xmp;

  192.     int *bitrates;          ///< bitrates read before streams creation

  193.     int bitrates_count;

  194.     int moov_retry;

  195.     int use_mfra_for;

  196.     int has_looked_for_mfra;

  197.     MOVFragmentIndex** fragment_index_data;

  198.     unsigned fragment_index_count;

  199.     int atom_depth;

  200. } MOVContext;

  201. 

  202. int ff_mp4_read_descr_len(AVIOContext *pb);

  203. int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);

  204. int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);

  205. void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);

  206. 

  207. #define MP4ODescrTag                    0x01

  208. #define MP4IODescrTag                   0x02

  209. #define MP4ESDescrTag                   0x03

  210. #define MP4DecConfigDescrTag            0x04

  211. #define MP4DecSpecificDescrTag          0x05

  212. #define MP4SLDescrTag                   0x06

  213. 

  214. #define MOV_TFHD_BASE_DATA_OFFSET       0x01

  215. #define MOV_TFHD_STSD_ID                0x02

  216. #define MOV_TFHD_DEFAULT_DURATION       0x08

  217. #define MOV_TFHD_DEFAULT_SIZE           0x10

  218. #define MOV_TFHD_DEFAULT_FLAGS          0x20

  219. #define MOV_TFHD_DURATION_IS_EMPTY  0x010000

  220. #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000

  221. 

  222. #define MOV_TRUN_DATA_OFFSET            0x01

  223. #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04

  224. #define MOV_TRUN_SAMPLE_DURATION       0x100

  225. #define MOV_TRUN_SAMPLE_SIZE           0x200

  226. #define MOV_TRUN_SAMPLE_FLAGS          0x400

  227. #define MOV_TRUN_SAMPLE_CTS            0x800

  228. 

  229. #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff

  230. #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000

  231. #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000

  232. #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000

  233. #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000

  234. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000

  235. 

  236. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000

  237. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000

  238. 

  239. #define MOV_TKHD_FLAG_ENABLED       0x0001

  240. #define MOV_TKHD_FLAG_IN_MOVIE      0x0002

  241. #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004

  242. #define MOV_TKHD_FLAG_IN_POSTER     0x0008

  243. 

  244. #define TAG_IS_AVCI(tag)                    \

  245.     ((tag) == MKTAG('a', 'i', '5', 'p') ||  \

  246.      (tag) == MKTAG('a', 'i', '5', 'q') ||  \

  247.      (tag) == MKTAG('a', 'i', '5', '2') ||  \

  248.      (tag) == MKTAG('a', 'i', '5', '3') ||  \

  249.      (tag) == MKTAG('a', 'i', '5', '5') ||  \

  250.      (tag) == MKTAG('a', 'i', '5', '6') ||  \

  251.      (tag) == MKTAG('a', 'i', '1', 'p') ||  \

  252.      (tag) == MKTAG('a', 'i', '1', 'q') ||  \

  253.      (tag) == MKTAG('a', 'i', '1', '2') ||  \

  254.      (tag) == MKTAG('a', 'i', '1', '3') ||  \

  255.      (tag) == MKTAG('a', 'i', '1', '5') ||  \

  256.      (tag) == MKTAG('a', 'i', '1', '6') ||  \

  257.      (tag) == MKTAG('a', 'i', 'v', 'x') ||  \

  258.      (tag) == MKTAG('A', 'V', 'i', 'n'))

  259. 

  260. 

  261. int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb);

  262. enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags);

  263. 

  264. int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);

  265. void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);

  266. 

  267. #define FF_MOV_FLAG_MFRA_AUTO -1

  268. #define FF_MOV_FLAG_MFRA_DTS 1

  269. #define FF_MOV_FLAG_MFRA_PTS 2

  270. 

  271. #endif /* AVFORMAT_ISOM_H */