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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 <stddef.h>

  28. #include <stdint.h>

  29. 

  30. #include "libavutil/encryption_info.h"

  31. #include "libavutil/mastering_display_metadata.h"

  32. #include "libavutil/spherical.h"

  33. #include "libavutil/stereo3d.h"

  34. 

  35. #include "avio.h"

  36. #include "internal.h"

  37. #include "dv.h"

  38. 

  39. /* isom.c */

  40. extern const AVCodecTag ff_mp4_obj_type[];

  41. extern const AVCodecTag ff_codec_movvideo_tags[];

  42. extern const AVCodecTag ff_codec_movaudio_tags[];

  43. extern const AVCodecTag ff_codec_movsubtitle_tags[];

  44. extern const AVCodecTag ff_codec_movdata_tags[];

  45. 

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

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

  48. 

  49. struct AVAESCTR;

  50. 

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

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

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

  54.  */

  55. 

  56. typedef struct MOVStts {

  57.     unsigned int count;

  58.     int duration;

  59. } MOVStts;

  60. 

  61. typedef struct MOVStsc {

  62.     int first;

  63.     int count;

  64.     int id;

  65. } MOVStsc;

  66. 

  67. typedef struct MOVElst {

  68.     int64_t duration;

  69.     int64_t time;

  70.     float rate;

  71. } MOVElst;

  72. 

  73. typedef struct MOVDref {

  74.     uint32_t type;

  75.     char *path;

  76.     char *dir;

  77.     char volume[28];

  78.     char filename[64];

  79.     int16_t nlvl_to, nlvl_from;

  80. } MOVDref;

  81. 

  82. typedef struct MOVAtom {

  83.     uint32_t type;

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

  85. } MOVAtom;

  86. 

  87. struct MOVParseTableEntry;

  88. 

  89. typedef struct MOVFragment {

  90.     int found_tfhd;

  91.     unsigned track_id;

  92.     uint64_t base_data_offset;

  93.     uint64_t moof_offset;

  94.     uint64_t implicit_offset;

  95.     unsigned stsd_id;

  96.     unsigned duration;

  97.     unsigned size;

  98.     unsigned flags;

  99. } MOVFragment;

  100. 

  101. typedef struct MOVTrackExt {

  102.     unsigned track_id;

  103.     unsigned stsd_id;

  104.     unsigned duration;

  105.     unsigned size;

  106.     unsigned flags;

  107. } MOVTrackExt;

  108. 

  109. typedef struct MOVSbgp {

  110.     unsigned int count;

  111.     unsigned int index;

  112. } MOVSbgp;

  113. 

  114. typedef struct MOVEncryptionIndex {

  115.     // Individual encrypted samples.  If there are no elements, then the default

  116.     // settings will be used.

  117.     unsigned int nb_encrypted_samples;

  118.     AVEncryptionInfo **encrypted_samples;

  119. 

  120.     uint8_t* auxiliary_info_sizes;

  121.     size_t auxiliary_info_sample_count;

  122.     uint8_t auxiliary_info_default_size;

  123.     uint64_t* auxiliary_offsets;  ///< Absolute seek position

  124.     size_t auxiliary_offsets_count;

  125. } MOVEncryptionIndex;

  126. 

  127. typedef struct MOVFragmentStreamInfo {

  128.     int id;

  129.     int64_t sidx_pts;

  130.     int64_t first_tfra_pts;

  131.     int64_t tfdt_dts;

  132.     int index_entry;

  133.     MOVEncryptionIndex *encryption_index;

  134. } MOVFragmentStreamInfo;

  135. 

  136. typedef struct MOVFragmentIndexItem {

  137.     int64_t moof_offset;

  138.     int headers_read;

  139.     int current;

  140.     int nb_stream_info;

  141.     MOVFragmentStreamInfo * stream_info;

  142. } MOVFragmentIndexItem;

  143. 

  144. typedef struct MOVFragmentIndex {

  145.     int allocated_size;

  146.     int complete;

  147.     int current;

  148.     int nb_items;

  149.     MOVFragmentIndexItem * item;

  150. } MOVFragmentIndex;

  151. 

  152. typedef struct MOVIndexRange {

  153.     int64_t start;

  154.     int64_t end;

  155. } MOVIndexRange;

  156. 

  157. typedef struct MOVStreamContext {

  158.     AVIOContext *pb;

  159.     int pb_is_copied;

  160.     int ffindex;          ///< AVStream index

  161.     int next_chunk;

  162.     unsigned int chunk_count;

  163.     int64_t *chunk_offsets;

  164.     unsigned int stts_count;

  165.     MOVStts *stts_data;

  166.     unsigned int ctts_count;

  167.     unsigned int ctts_allocated_size;

  168.     MOVStts *ctts_data;

  169.     unsigned int stsc_count;

  170.     MOVStsc *stsc_data;

  171.     unsigned int stsc_index;

  172.     int stsc_sample;

  173.     unsigned int stps_count;

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

  175.     MOVElst *elst_data;

  176.     unsigned int elst_count;

  177.     int ctts_index;

  178.     int ctts_sample;

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

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

  181.     unsigned int sample_count;

  182.     int *sample_sizes;

  183.     int keyframe_absent;

  184.     unsigned int keyframe_count;

  185.     int *keyframes;

  186.     int time_scale;

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

  188.     int64_t min_corrected_pts;  ///< minimum Composition time shown by the edits excluding empty edits.

  189.     int current_sample;

  190.     int64_t current_index;

  191.     MOVIndexRange* index_ranges;

  192.     MOVIndexRange* current_index_range;

  193.     unsigned int bytes_per_frame;

  194.     unsigned int samples_per_frame;

  195.     int dv_audio_container;

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

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

  198.     unsigned drefs_count;

  199.     MOVDref *drefs;

  200.     int dref_id;

  201.     int timecode_track;

  202.     int width;            ///< tkhd width

  203.     int height;           ///< tkhd height

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

  205.     uint32_t palette[256];

  206.     int has_palette;

  207.     int64_t data_size;

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

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

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

  211.     unsigned int rap_group_count;

  212.     MOVSbgp *rap_group;

  213. 

  214.     int nb_frames_for_fps;

  215.     int64_t duration_for_fps;

  216. 

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

  218.     uint8_t **extradata;

  219.     int *extradata_size;

  220.     int last_stsd_index;

  221.     int stsd_count;

  222.     int stsd_version;

  223. 

  224.     int32_t *display_matrix;

  225.     AVStereo3D *stereo3d;

  226.     AVSphericalMapping *spherical;

  227.     size_t spherical_size;

  228.     AVMasteringDisplayMetadata *mastering;

  229.     AVContentLightMetadata *coll;

  230.     size_t coll_size;

  231. 

  232.     uint32_t format;

  233. 

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

  235.     struct {

  236.         struct AVAESCTR* aes_ctr;

  237.         unsigned int per_sample_iv_size;  // Either 0, 8, or 16.

  238.         AVEncryptionInfo *default_encrypted_sample;

  239.         MOVEncryptionIndex *encryption_index;

  240.     } cenc;

  241. } MOVStreamContext;

  242. 

  243. typedef struct MOVContext {

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

  245.     AVFormatContext *fc;

  246.     int time_scale;

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

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

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

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

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

  252.     char **meta_keys;

  253.     unsigned meta_keys_count;

  254.     DVDemuxContext *dv_demux;

  255.     AVFormatContext *dv_fctx;

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

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

  258.     MOVTrackExt *trex_data;

  259.     unsigned trex_count;

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

  261.     int handbrake_version;

  262.     int *chapter_tracks;

  263.     unsigned int nb_chapter_tracks;

  264.     int use_absolute_path;

  265.     int ignore_editlist;

  266.     int advanced_editlist;

  267.     int ignore_chapters;

  268.     int seek_individually;

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

  270.     int export_all;

  271.     int export_xmp;

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

  273.     int bitrates_count;

  274.     int moov_retry;

  275.     int use_mfra_for;

  276.     int has_looked_for_mfra;

  277.     MOVFragmentIndex frag_index;

  278.     int atom_depth;

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

  280.     uint8_t file_key[20];

  281.     uint8_t file_iv[20];

  282.     void *activation_bytes;

  283.     int activation_bytes_size;

  284.     void *audible_fixed_key;

  285.     int audible_fixed_key_size;

  286.     struct AVAES *aes_decrypt;

  287.     uint8_t *decryption_key;

  288.     int decryption_key_len;

  289.     int enable_drefs;

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

  291. } MOVContext;

  292. 

  293. int ff_mp4_read_descr_len(AVIOContext *pb);

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

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

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

  297. 

  298. #define MP4ODescrTag                    0x01

  299. #define MP4IODescrTag                   0x02

  300. #define MP4ESDescrTag                   0x03

  301. #define MP4DecConfigDescrTag            0x04

  302. #define MP4DecSpecificDescrTag          0x05

  303. #define MP4SLDescrTag                   0x06

  304. 

  305. #define MOV_TFHD_BASE_DATA_OFFSET       0x01

  306. #define MOV_TFHD_STSD_ID                0x02

  307. #define MOV_TFHD_DEFAULT_DURATION       0x08

  308. #define MOV_TFHD_DEFAULT_SIZE           0x10

  309. #define MOV_TFHD_DEFAULT_FLAGS          0x20

  310. #define MOV_TFHD_DURATION_IS_EMPTY  0x010000

  311. #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000

  312. 

  313. #define MOV_TRUN_DATA_OFFSET            0x01

  314. #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04

  315. #define MOV_TRUN_SAMPLE_DURATION       0x100

  316. #define MOV_TRUN_SAMPLE_SIZE           0x200

  317. #define MOV_TRUN_SAMPLE_FLAGS          0x400

  318. #define MOV_TRUN_SAMPLE_CTS            0x800

  319. 

  320. #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff

  321. #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000

  322. #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000

  323. #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000

  324. #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000

  325. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000

  326. 

  327. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000

  328. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000

  329. 

  330. #define MOV_TKHD_FLAG_ENABLED       0x0001

  331. #define MOV_TKHD_FLAG_IN_MOVIE      0x0002

  332. #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004

  333. #define MOV_TKHD_FLAG_IN_POSTER     0x0008

  334. 

  335. #define MOV_SAMPLE_DEPENDENCY_UNKNOWN 0x0

  336. #define MOV_SAMPLE_DEPENDENCY_YES     0x1

  337. #define MOV_SAMPLE_DEPENDENCY_NO      0x2

  338. 

  339. 

  340. #define TAG_IS_AVCI(tag)                    \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  355. 

  356. 

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

  358. 

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

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

  361. 

  362. #define FF_MOV_FLAG_MFRA_AUTO -1

  363. #define FF_MOV_FLAG_MFRA_DTS 1

  364. #define FF_MOV_FLAG_MFRA_PTS 2

  365. 

  366. /**

  367.  * Compute codec id for 'lpcm' tag.

  368.  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.

  369.  */

  370. static inline enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)

  371. {

  372.     /* lpcm flags:

  373.      * 0x1 = float

  374.      * 0x2 = big-endian

  375.      * 0x4 = signed

  376.      */

  377.     return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);

  378. }

  379. 

  380. #endif /* AVFORMAT_ISOM_H */