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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. struct AVAESCTR;

  41. 

  42. /* the QuickTime file format is quite convoluted...

  43.  * it has lots of index tables, each indexing something in another one...

  44.  * Here we just use what is needed to read the chunks

  45.  */

  46. 

  47. typedef struct MOVStts {

  48.     int count;

  49.     int duration;

  50. } MOVStts;

  51. 

  52. typedef struct MOVStsc {

  53.     int first;

  54.     int count;

  55.     int id;

  56. } MOVStsc;

  57. 

  58. typedef struct MOVElst {

  59.     int64_t duration;

  60.     int64_t time;

  61.     float rate;

  62. } MOVElst;

  63. 

  64. typedef struct MOVDref {

  65.     uint32_t type;

  66.     char *path;

  67.     char *dir;

  68.     char volume[28];

  69.     char filename[64];

  70.     int16_t nlvl_to, nlvl_from;

  71. } MOVDref;

  72. 

  73. typedef struct MOVAtom {

  74.     uint32_t type;

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

  76. } MOVAtom;

  77. 

  78. struct MOVParseTableEntry;

  79. 

  80. typedef struct MOVFragment {

  81.     unsigned track_id;

  82.     uint64_t base_data_offset;

  83.     uint64_t moof_offset;

  84.     uint64_t implicit_offset;

  85.     unsigned stsd_id;

  86.     unsigned duration;

  87.     unsigned size;

  88.     unsigned flags;

  89.     int64_t time;

  90. } MOVFragment;

  91. 

  92. typedef struct MOVTrackExt {

  93.     unsigned track_id;

  94.     unsigned stsd_id;

  95.     unsigned duration;

  96.     unsigned size;

  97.     unsigned flags;

  98. } MOVTrackExt;

  99. 

  100. typedef struct MOVSbgp {

  101.     unsigned int count;

  102.     unsigned int index;

  103. } MOVSbgp;

  104. 

  105. typedef struct MOVFragmentIndexItem {

  106.     int64_t moof_offset;

  107.     int64_t time;

  108.     int headers_read;

  109. } MOVFragmentIndexItem;

  110. 

  111. typedef struct MOVFragmentIndex {

  112.     unsigned track_id;

  113.     unsigned item_count;

  114.     unsigned current_item;

  115.     MOVFragmentIndexItem *items;

  116. } MOVFragmentIndex;

  117. 

  118. typedef struct MOVStreamContext {

  119.     AVIOContext *pb;

  120.     int pb_is_copied;

  121.     int ffindex;          ///< AVStream index

  122.     int next_chunk;

  123.     unsigned int chunk_count;

  124.     int64_t *chunk_offsets;

  125.     unsigned int stts_count;

  126.     MOVStts *stts_data;

  127.     unsigned int ctts_count;

  128.     MOVStts *ctts_data;

  129.     unsigned int stsc_count;

  130.     MOVStsc *stsc_data;

  131.     unsigned int stps_count;

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

  133.     MOVElst *elst_data;

  134.     unsigned int elst_count;

  135.     int ctts_index;

  136.     int ctts_sample;

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

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

  139.     unsigned int sample_count;

  140.     int *sample_sizes;

  141.     int keyframe_absent;

  142.     unsigned int keyframe_count;

  143.     int *keyframes;

  144.     int time_scale;

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

  146.     int current_sample;

  147.     unsigned int bytes_per_frame;

  148.     unsigned int samples_per_frame;

  149.     int dv_audio_container;

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

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

  152.     unsigned drefs_count;

  153.     MOVDref *drefs;

  154.     int dref_id;

  155.     int timecode_track;

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

  157.     int width;            ///< tkhd width

  158.     int height;           ///< tkhd height

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

  160.     uint32_t palette[256];

  161.     int has_palette;

  162.     int64_t data_size;

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

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

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

  166.     unsigned int rap_group_count;

  167.     MOVSbgp *rap_group;

  168. 

  169.     int nb_frames_for_fps;

  170.     int64_t duration_for_fps;

  171. 

  172.     int32_t *display_matrix;

  173.     uint32_t format;

  174. 

  175.     struct {

  176.         int use_subsamples;

  177.         uint8_t* auxiliary_info;

  178.         uint8_t* auxiliary_info_end;

  179.         uint8_t* auxiliary_info_pos;

  180.         struct AVAESCTR* aes_ctr;

  181.     } cenc;

  182. } MOVStreamContext;

  183. 

  184. typedef struct MOVContext {

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

  186.     AVFormatContext *fc;

  187.     int time_scale;

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

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

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

  191.     int found_hdlr_mdta;  ///< 'hdlr' atom with type 'mdta' has been found

  192.     int trak_index;       ///< Index of the current 'trak'

  193.     char **meta_keys;

  194.     unsigned meta_keys_count;

  195.     DVDemuxContext *dv_demux;

  196.     AVFormatContext *dv_fctx;

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

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

  199.     MOVTrackExt *trex_data;

  200.     unsigned trex_count;

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

  202.     int handbrake_version;

  203.     int chapter_track;

  204.     int use_absolute_path;

  205.     int ignore_editlist;

  206.     int ignore_chapters;

  207.     int seek_individually;

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

  209.     int export_all;

  210.     int export_xmp;

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

  212.     int bitrates_count;

  213.     int moov_retry;

  214.     int use_mfra_for;

  215.     int has_looked_for_mfra;

  216.     MOVFragmentIndex** fragment_index_data;

  217.     unsigned fragment_index_count;

  218.     int fragment_index_complete;

  219.     int atom_depth;

  220.     unsigned int aax_mode;  ///< 'aax' file has been detected

  221.     uint8_t file_key[20];

  222.     uint8_t file_iv[20];

  223.     void *activation_bytes;

  224.     int activation_bytes_size;

  225.     void *audible_fixed_key;

  226.     int audible_fixed_key_size;

  227.     struct AVAES *aes_decrypt;

  228.     uint8_t *decryption_key;

  229.     int decryption_key_len;

  230. } MOVContext;

  231. 

  232. int ff_mp4_read_descr_len(AVIOContext *pb);

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

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

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

  236. 

  237. #define MP4ODescrTag                    0x01

  238. #define MP4IODescrTag                   0x02

  239. #define MP4ESDescrTag                   0x03

  240. #define MP4DecConfigDescrTag            0x04

  241. #define MP4DecSpecificDescrTag          0x05

  242. #define MP4SLDescrTag                   0x06

  243. 

  244. #define MOV_TFHD_BASE_DATA_OFFSET       0x01

  245. #define MOV_TFHD_STSD_ID                0x02

  246. #define MOV_TFHD_DEFAULT_DURATION       0x08

  247. #define MOV_TFHD_DEFAULT_SIZE           0x10

  248. #define MOV_TFHD_DEFAULT_FLAGS          0x20

  249. #define MOV_TFHD_DURATION_IS_EMPTY  0x010000

  250. #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000

  251. 

  252. #define MOV_TRUN_DATA_OFFSET            0x01

  253. #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04

  254. #define MOV_TRUN_SAMPLE_DURATION       0x100

  255. #define MOV_TRUN_SAMPLE_SIZE           0x200

  256. #define MOV_TRUN_SAMPLE_FLAGS          0x400

  257. #define MOV_TRUN_SAMPLE_CTS            0x800

  258. 

  259. #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff

  260. #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000

  261. #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000

  262. #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000

  263. #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000

  264. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000

  265. 

  266. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000

  267. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000

  268. 

  269. #define MOV_TKHD_FLAG_ENABLED       0x0001

  270. #define MOV_TKHD_FLAG_IN_MOVIE      0x0002

  271. #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004

  272. #define MOV_TKHD_FLAG_IN_POSTER     0x0008

  273. 

  274. #define TAG_IS_AVCI(tag)                    \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  289. 

  290. 

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

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

  293. 

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

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

  296. 

  297. #define FF_MOV_FLAG_MFRA_AUTO -1

  298. #define FF_MOV_FLAG_MFRA_DTS 1

  299. #define FF_MOV_FLAG_MFRA_PTS 2

  300. 

  301. #endif /* AVFORMAT_ISOM_H */