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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 "libavutil/spherical.h"

  28. #include "libavutil/stereo3d.h"

  29. 

  30. #include "avio.h"

  31. #include "internal.h"

  32. #include "dv.h"

  33. 

  34. /* isom.c */

  35. extern const AVCodecTag ff_mp4_obj_type[];

  36. extern const AVCodecTag ff_codec_movvideo_tags[];

  37. extern const AVCodecTag ff_codec_movaudio_tags[];

  38. extern const AVCodecTag ff_codec_movsubtitle_tags[];

  39. 

  40. int ff_mov_iso639_to_lang(const char lang[4], int mp4);

  41. int ff_mov_lang_to_iso639(unsigned code, char to[4]);

  42. 

  43. struct AVAESCTR;

  44. 

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

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

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

  48.  */

  49. 

  50. typedef struct MOVStts {

  51.     int count;

  52.     int duration;

  53. } MOVStts;

  54. 

  55. typedef struct MOVStsc {

  56.     int first;

  57.     int count;

  58.     int id;

  59. } MOVStsc;

  60. 

  61. typedef struct MOVElst {

  62.     int64_t duration;

  63.     int64_t time;

  64.     float rate;

  65. } MOVElst;

  66. 

  67. typedef struct MOVDref {

  68.     uint32_t type;

  69.     char *path;

  70.     char *dir;

  71.     char volume[28];

  72.     char filename[64];

  73.     int16_t nlvl_to, nlvl_from;

  74. } MOVDref;

  75. 

  76. typedef struct MOVAtom {

  77.     uint32_t type;

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

  79. } MOVAtom;

  80. 

  81. struct MOVParseTableEntry;

  82. 

  83. typedef struct MOVFragment {

  84.     unsigned track_id;

  85.     uint64_t base_data_offset;

  86.     uint64_t moof_offset;

  87.     uint64_t implicit_offset;

  88.     unsigned stsd_id;

  89.     unsigned duration;

  90.     unsigned size;

  91.     unsigned flags;

  92.     int64_t time;

  93. } MOVFragment;

  94. 

  95. typedef struct MOVTrackExt {

  96.     unsigned track_id;

  97.     unsigned stsd_id;

  98.     unsigned duration;

  99.     unsigned size;

  100.     unsigned flags;

  101. } MOVTrackExt;

  102. 

  103. typedef struct MOVSbgp {

  104.     unsigned int count;

  105.     unsigned int index;

  106. } MOVSbgp;

  107. 

  108. typedef struct MOVFragmentIndexItem {

  109.     int64_t moof_offset;

  110.     int64_t time;

  111.     int headers_read;

  112. } MOVFragmentIndexItem;

  113. 

  114. typedef struct MOVFragmentIndex {

  115.     unsigned track_id;

  116.     unsigned item_count;

  117.     unsigned current_item;

  118.     MOVFragmentIndexItem *items;

  119. } MOVFragmentIndex;

  120. 

  121. typedef struct MOVStreamContext {

  122.     AVIOContext *pb;

  123.     int pb_is_copied;

  124.     int ffindex;          ///< AVStream index

  125.     int next_chunk;

  126.     unsigned int chunk_count;

  127.     int64_t *chunk_offsets;

  128.     unsigned int stts_count;

  129.     MOVStts *stts_data;

  130.     unsigned int ctts_count;

  131.     MOVStts *ctts_data;

  132.     unsigned int stsc_count;

  133.     MOVStsc *stsc_data;

  134.     int stsc_index;

  135.     int stsc_sample;

  136.     unsigned int stps_count;

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

  138.     MOVElst *elst_data;

  139.     unsigned int elst_count;

  140.     int ctts_index;

  141.     int ctts_sample;

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

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

  144.     unsigned int sample_count;

  145.     int *sample_sizes;

  146.     int keyframe_absent;

  147.     unsigned int keyframe_count;

  148.     int *keyframes;

  149.     int time_scale;

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

  151.     int current_sample;

  152.     unsigned int bytes_per_frame;

  153.     unsigned int samples_per_frame;

  154.     int dv_audio_container;

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

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

  157.     unsigned drefs_count;

  158.     MOVDref *drefs;

  159.     int dref_id;

  160.     int timecode_track;

  161.     int width;            ///< tkhd width

  162.     int height;           ///< tkhd height

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

  164.     uint32_t palette[256];

  165.     int has_palette;

  166.     int64_t data_size;

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

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

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

  170.     unsigned int rap_group_count;

  171.     MOVSbgp *rap_group;

  172. 

  173.     int nb_frames_for_fps;

  174.     int64_t duration_for_fps;

  175. 

  176.     /** extradata array (and size) for multiple stsd */

  177.     uint8_t **extradata;

  178.     int *extradata_size;

  179.     int last_stsd_index;

  180.     int stsd_count;

  181. 

  182.     int32_t *display_matrix;

  183.     AVStereo3D *stereo3d;

  184.     AVSphericalMapping *spherical;

  185.     size_t spherical_size;

  186. 

  187.     uint32_t format;

  188. 

  189.     int has_sidx;  // If there is an sidx entry for this stream.

  190.     struct {

  191.         int use_subsamples;

  192.         uint8_t* auxiliary_info;

  193.         uint8_t* auxiliary_info_end;

  194.         uint8_t* auxiliary_info_pos;

  195.         uint8_t auxiliary_info_default_size;

  196.         uint8_t* auxiliary_info_sizes;

  197.         size_t auxiliary_info_sizes_count;

  198.         struct AVAESCTR* aes_ctr;

  199.     } cenc;

  200. } MOVStreamContext;

  201. 

  202. typedef struct MOVContext {

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

  204.     AVFormatContext *fc;

  205.     int time_scale;

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

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

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

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

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

  211.     char **meta_keys;

  212.     unsigned meta_keys_count;

  213.     DVDemuxContext *dv_demux;

  214.     AVFormatContext *dv_fctx;

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

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

  217.     MOVTrackExt *trex_data;

  218.     unsigned trex_count;

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

  220.     int handbrake_version;

  221.     int *chapter_tracks;

  222.     unsigned int nb_chapter_tracks;

  223.     int use_absolute_path;

  224.     int ignore_editlist;

  225.     int ignore_chapters;

  226.     int seek_individually;

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

  228.     int export_all;

  229.     int export_xmp;

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

  231.     int bitrates_count;

  232.     int moov_retry;

  233.     int use_mfra_for;

  234.     int has_looked_for_mfra;

  235.     MOVFragmentIndex** fragment_index_data;

  236.     unsigned fragment_index_count;

  237.     int fragment_index_complete;

  238.     int atom_depth;

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

  240.     uint8_t file_key[20];

  241.     uint8_t file_iv[20];

  242.     void *activation_bytes;

  243.     int activation_bytes_size;

  244.     void *audible_fixed_key;

  245.     int audible_fixed_key_size;

  246.     struct AVAES *aes_decrypt;

  247.     uint8_t *decryption_key;

  248.     int decryption_key_len;

  249.     int enable_drefs;

  250.     int32_t movie_display_matrix[3][3]; ///< display matrix from mvhd

  251. } MOVContext;

  252. 

  253. int ff_mp4_read_descr_len(AVIOContext *pb);

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

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

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

  257. 

  258. #define MP4ODescrTag                    0x01

  259. #define MP4IODescrTag                   0x02

  260. #define MP4ESDescrTag                   0x03

  261. #define MP4DecConfigDescrTag            0x04

  262. #define MP4DecSpecificDescrTag          0x05

  263. #define MP4SLDescrTag                   0x06

  264. 

  265. #define MOV_TFHD_BASE_DATA_OFFSET       0x01

  266. #define MOV_TFHD_STSD_ID                0x02

  267. #define MOV_TFHD_DEFAULT_DURATION       0x08

  268. #define MOV_TFHD_DEFAULT_SIZE           0x10

  269. #define MOV_TFHD_DEFAULT_FLAGS          0x20

  270. #define MOV_TFHD_DURATION_IS_EMPTY  0x010000

  271. #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000

  272. 

  273. #define MOV_TRUN_DATA_OFFSET            0x01

  274. #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04

  275. #define MOV_TRUN_SAMPLE_DURATION       0x100

  276. #define MOV_TRUN_SAMPLE_SIZE           0x200

  277. #define MOV_TRUN_SAMPLE_FLAGS          0x400

  278. #define MOV_TRUN_SAMPLE_CTS            0x800

  279. 

  280. #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff

  281. #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000

  282. #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000

  283. #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000

  284. #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000

  285. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000

  286. 

  287. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000

  288. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000

  289. 

  290. #define MOV_TKHD_FLAG_ENABLED       0x0001

  291. #define MOV_TKHD_FLAG_IN_MOVIE      0x0002

  292. #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004

  293. #define MOV_TKHD_FLAG_IN_POSTER     0x0008

  294. 

  295. #define TAG_IS_AVCI(tag)                    \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  310. 

  311. 

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

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

  314. 

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

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

  317. 

  318. #define FF_MOV_FLAG_MFRA_AUTO -1

  319. #define FF_MOV_FLAG_MFRA_DTS 1

  320. #define FF_MOV_FLAG_MFRA_PTS 2

  321. 

  322. #endif /* AVFORMAT_ISOM_H */