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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/mastering_display_metadata.h"

  31. #include "libavutil/spherical.h"

  32. #include "libavutil/stereo3d.h"

  33. 

  34. #include "avio.h"

  35. #include "internal.h"

  36. #include "dv.h"

  37. 

  38. /* isom.c */

  39. extern const AVCodecTag ff_mp4_obj_type[];

  40. extern const AVCodecTag ff_codec_movvideo_tags[];

  41. extern const AVCodecTag ff_codec_movaudio_tags[];

  42. extern const AVCodecTag ff_codec_movsubtitle_tags[];

  43. 

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

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

  46. 

  47. struct AVAESCTR;

  48. 

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

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

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

  52.  */

  53. 

  54. typedef struct MOVStts {

  55.     int count;

  56.     int duration;

  57. } MOVStts;

  58. 

  59. typedef struct MOVStsc {

  60.     int first;

  61.     int count;

  62.     int id;

  63. } MOVStsc;

  64. 

  65. typedef struct MOVElst {

  66.     int64_t duration;

  67.     int64_t time;

  68.     float rate;

  69. } MOVElst;

  70. 

  71. typedef struct MOVDref {

  72.     uint32_t type;

  73.     char *path;

  74.     char *dir;

  75.     char volume[28];

  76.     char filename[64];

  77.     int16_t nlvl_to, nlvl_from;

  78. } MOVDref;

  79. 

  80. typedef struct MOVAtom {

  81.     uint32_t type;

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

  83. } MOVAtom;

  84. 

  85. struct MOVParseTableEntry;

  86. 

  87. typedef struct MOVFragment {

  88.     unsigned track_id;

  89.     uint64_t base_data_offset;

  90.     uint64_t moof_offset;

  91.     uint64_t implicit_offset;

  92.     unsigned stsd_id;

  93.     unsigned duration;

  94.     unsigned size;

  95.     unsigned flags;

  96.     int64_t time;

  97. } MOVFragment;

  98. 

  99. typedef struct MOVTrackExt {

  100.     unsigned track_id;

  101.     unsigned stsd_id;

  102.     unsigned duration;

  103.     unsigned size;

  104.     unsigned flags;

  105. } MOVTrackExt;

  106. 

  107. typedef struct MOVSbgp {

  108.     unsigned int count;

  109.     unsigned int index;

  110. } MOVSbgp;

  111. 

  112. typedef struct MOVFragmentIndexItem {

  113.     int64_t moof_offset;

  114.     int64_t time;

  115.     int headers_read;

  116. } MOVFragmentIndexItem;

  117. 

  118. typedef struct MOVFragmentIndex {

  119.     unsigned track_id;

  120.     unsigned item_count;

  121.     unsigned current_item;

  122.     MOVFragmentIndexItem *items;

  123. } MOVFragmentIndex;

  124. 

  125. typedef struct MOVIndexRange {

  126.     int64_t start;

  127.     int64_t end;

  128. } MOVIndexRange;

  129. 

  130. typedef struct MOVStreamContext {

  131.     AVIOContext *pb;

  132.     int pb_is_copied;

  133.     int ffindex;          ///< AVStream index

  134.     int next_chunk;

  135.     unsigned int chunk_count;

  136.     int64_t *chunk_offsets;

  137.     unsigned int stts_count;

  138.     MOVStts *stts_data;

  139.     unsigned int ctts_count;

  140.     MOVStts *ctts_data;

  141.     unsigned int stsc_count;

  142.     MOVStsc *stsc_data;

  143.     int stsc_index;

  144.     int stsc_sample;

  145.     unsigned int stps_count;

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

  147.     MOVElst *elst_data;

  148.     unsigned int elst_count;

  149.     int ctts_index;

  150.     int ctts_sample;

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

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

  153.     unsigned int sample_count;

  154.     int *sample_sizes;

  155.     int keyframe_absent;

  156.     unsigned int keyframe_count;

  157.     int *keyframes;

  158.     int time_scale;

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

  160.     int current_sample;

  161.     int64_t current_index;

  162.     MOVIndexRange* index_ranges;

  163.     MOVIndexRange* current_index_range;

  164.     unsigned int bytes_per_frame;

  165.     unsigned int samples_per_frame;

  166.     int dv_audio_container;

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

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

  169.     unsigned drefs_count;

  170.     MOVDref *drefs;

  171.     int dref_id;

  172.     int timecode_track;

  173.     int width;            ///< tkhd width

  174.     int height;           ///< tkhd height

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

  176.     uint32_t palette[256];

  177.     int has_palette;

  178.     int64_t data_size;

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

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

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

  182.     unsigned int rap_group_count;

  183.     MOVSbgp *rap_group;

  184. 

  185.     int nb_frames_for_fps;

  186.     int64_t duration_for_fps;

  187. 

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

  189.     uint8_t **extradata;

  190.     int *extradata_size;

  191.     int last_stsd_index;

  192.     int stsd_count;

  193. 

  194.     int32_t *display_matrix;

  195.     AVStereo3D *stereo3d;

  196.     AVSphericalMapping *spherical;

  197.     size_t spherical_size;

  198.     AVMasteringDisplayMetadata *mastering;

  199. 

  200.     uint32_t format;

  201. 

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

  203.     struct {

  204.         int use_subsamples;

  205.         uint8_t* auxiliary_info;

  206.         uint8_t* auxiliary_info_end;

  207.         uint8_t* auxiliary_info_pos;

  208.         uint8_t auxiliary_info_default_size;

  209.         uint8_t* auxiliary_info_sizes;

  210.         size_t auxiliary_info_sizes_count;

  211.         int64_t auxiliary_info_index;

  212.         struct AVAESCTR* aes_ctr;

  213.     } cenc;

  214. } MOVStreamContext;

  215. 

  216. typedef struct MOVContext {

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

  218.     AVFormatContext *fc;

  219.     int time_scale;

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

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

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

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

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

  225.     char **meta_keys;

  226.     unsigned meta_keys_count;

  227.     DVDemuxContext *dv_demux;

  228.     AVFormatContext *dv_fctx;

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

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

  231.     MOVTrackExt *trex_data;

  232.     unsigned trex_count;

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

  234.     int handbrake_version;

  235.     int *chapter_tracks;

  236.     unsigned int nb_chapter_tracks;

  237.     int use_absolute_path;

  238.     int ignore_editlist;

  239.     int advanced_editlist;

  240.     int ignore_chapters;

  241.     int seek_individually;

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

  243.     int export_all;

  244.     int export_xmp;

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

  246.     int bitrates_count;

  247.     int moov_retry;

  248.     int use_mfra_for;

  249.     int has_looked_for_mfra;

  250.     MOVFragmentIndex** fragment_index_data;

  251.     unsigned fragment_index_count;

  252.     int fragment_index_complete;

  253.     int atom_depth;

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

  255.     uint8_t file_key[20];

  256.     uint8_t file_iv[20];

  257.     void *activation_bytes;

  258.     int activation_bytes_size;

  259.     void *audible_fixed_key;

  260.     int audible_fixed_key_size;

  261.     struct AVAES *aes_decrypt;

  262.     uint8_t *decryption_key;

  263.     int decryption_key_len;

  264.     int enable_drefs;

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

  266. } MOVContext;

  267. 

  268. int ff_mp4_read_descr_len(AVIOContext *pb);

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

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

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

  272. 

  273. #define MP4ODescrTag                    0x01

  274. #define MP4IODescrTag                   0x02

  275. #define MP4ESDescrTag                   0x03

  276. #define MP4DecConfigDescrTag            0x04

  277. #define MP4DecSpecificDescrTag          0x05

  278. #define MP4SLDescrTag                   0x06

  279. 

  280. #define MOV_TFHD_BASE_DATA_OFFSET       0x01

  281. #define MOV_TFHD_STSD_ID                0x02

  282. #define MOV_TFHD_DEFAULT_DURATION       0x08

  283. #define MOV_TFHD_DEFAULT_SIZE           0x10

  284. #define MOV_TFHD_DEFAULT_FLAGS          0x20

  285. #define MOV_TFHD_DURATION_IS_EMPTY  0x010000

  286. #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000

  287. 

  288. #define MOV_TRUN_DATA_OFFSET            0x01

  289. #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04

  290. #define MOV_TRUN_SAMPLE_DURATION       0x100

  291. #define MOV_TRUN_SAMPLE_SIZE           0x200

  292. #define MOV_TRUN_SAMPLE_FLAGS          0x400

  293. #define MOV_TRUN_SAMPLE_CTS            0x800

  294. 

  295. #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff

  296. #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000

  297. #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000

  298. #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000

  299. #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000

  300. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000

  301. 

  302. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000

  303. #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000

  304. 

  305. #define MOV_TKHD_FLAG_ENABLED       0x0001

  306. #define MOV_TKHD_FLAG_IN_MOVIE      0x0002

  307. #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004

  308. #define MOV_TKHD_FLAG_IN_POSTER     0x0008

  309. 

  310. #define TAG_IS_AVCI(tag)                    \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  325. 

  326. 

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

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

  329. 

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

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

  332. 

  333. #define FF_MOV_FLAG_MFRA_AUTO -1

  334. #define FF_MOV_FLAG_MFRA_DTS 1

  335. #define FF_MOV_FLAG_MFRA_PTS 2

  336. 

  337. #endif /* AVFORMAT_ISOM_H */