LCOV - code coverage report
Current view: top level - libavformat - isom.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 2 2 100.0 %
Date: 2018-05-20 11:54:08 Functions: 1 1 100.0 %

          Line data    Source code
       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             : 
      45             : int ff_mov_iso639_to_lang(const char lang[4], int mp4);
      46             : int ff_mov_lang_to_iso639(unsigned code, char to[4]);
      47             : 
      48             : struct AVAESCTR;
      49             : 
      50             : /* the QuickTime file format is quite convoluted...
      51             :  * it has lots of index tables, each indexing something in another one...
      52             :  * Here we just use what is needed to read the chunks
      53             :  */
      54             : 
      55             : typedef struct MOVStts {
      56             :     unsigned int count;
      57             :     int duration;
      58             : } MOVStts;
      59             : 
      60             : typedef struct MOVStsc {
      61             :     int first;
      62             :     int count;
      63             :     int id;
      64             : } MOVStsc;
      65             : 
      66             : typedef struct MOVElst {
      67             :     int64_t duration;
      68             :     int64_t time;
      69             :     float rate;
      70             : } MOVElst;
      71             : 
      72             : typedef struct MOVDref {
      73             :     uint32_t type;
      74             :     char *path;
      75             :     char *dir;
      76             :     char volume[28];
      77             :     char filename[64];
      78             :     int16_t nlvl_to, nlvl_from;
      79             : } MOVDref;
      80             : 
      81             : typedef struct MOVAtom {
      82             :     uint32_t type;
      83             :     int64_t size; /* total size (excluding the size and type fields) */
      84             : } MOVAtom;
      85             : 
      86             : struct MOVParseTableEntry;
      87             : 
      88             : typedef struct MOVFragment {
      89             :     unsigned track_id;
      90             :     uint64_t base_data_offset;
      91             :     uint64_t moof_offset;
      92             :     uint64_t implicit_offset;
      93             :     unsigned stsd_id;
      94             :     unsigned duration;
      95             :     unsigned size;
      96             :     unsigned flags;
      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 MOVEncryptionIndex {
     113             :     // Individual encrypted samples.  If there are no elements, then the default
     114             :     // settings will be used.
     115             :     unsigned int nb_encrypted_samples;
     116             :     AVEncryptionInfo **encrypted_samples;
     117             : 
     118             :     uint8_t* auxiliary_info_sizes;
     119             :     size_t auxiliary_info_sample_count;
     120             :     uint8_t auxiliary_info_default_size;
     121             :     size_t* auxiliary_offsets;  ///< Absolute seek position
     122             :     size_t auxiliary_offsets_count;
     123             : } MOVEncryptionIndex;
     124             : 
     125             : typedef struct MOVFragmentStreamInfo {
     126             :     int id;
     127             :     int64_t sidx_pts;
     128             :     int64_t first_tfra_pts;
     129             :     int64_t tfdt_dts;
     130             :     int index_entry;
     131             :     MOVEncryptionIndex *encryption_index;
     132             : } MOVFragmentStreamInfo;
     133             : 
     134             : typedef struct MOVFragmentIndexItem {
     135             :     int64_t moof_offset;
     136             :     int headers_read;
     137             :     int current;
     138             :     int nb_stream_info;
     139             :     MOVFragmentStreamInfo * stream_info;
     140             : } MOVFragmentIndexItem;
     141             : 
     142             : typedef struct MOVFragmentIndex {
     143             :     int allocated_size;
     144             :     int complete;
     145             :     int current;
     146             :     int nb_items;
     147             :     MOVFragmentIndexItem * item;
     148             : } MOVFragmentIndex;
     149             : 
     150             : typedef struct MOVIndexRange {
     151             :     int64_t start;
     152             :     int64_t end;
     153             : } MOVIndexRange;
     154             : 
     155             : typedef struct MOVStreamContext {
     156             :     AVIOContext *pb;
     157             :     int pb_is_copied;
     158             :     int ffindex;          ///< AVStream index
     159             :     int next_chunk;
     160             :     unsigned int chunk_count;
     161             :     int64_t *chunk_offsets;
     162             :     unsigned int stts_count;
     163             :     MOVStts *stts_data;
     164             :     unsigned int ctts_count;
     165             :     unsigned int ctts_allocated_size;
     166             :     MOVStts *ctts_data;
     167             :     unsigned int stsc_count;
     168             :     MOVStsc *stsc_data;
     169             :     unsigned int stsc_index;
     170             :     int stsc_sample;
     171             :     unsigned int stps_count;
     172             :     unsigned *stps_data;  ///< partial sync sample for mpeg-2 open gop
     173             :     MOVElst *elst_data;
     174             :     unsigned int elst_count;
     175             :     int ctts_index;
     176             :     int ctts_sample;
     177             :     unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
     178             :     unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
     179             :     unsigned int sample_count;
     180             :     int *sample_sizes;
     181             :     int keyframe_absent;
     182             :     unsigned int keyframe_count;
     183             :     int *keyframes;
     184             :     int time_scale;
     185             :     int64_t time_offset;  ///< time offset of the edit list entries
     186             :     int64_t min_corrected_pts;  ///< minimum Composition time shown by the edits excluding empty edits.
     187             :     int current_sample;
     188             :     int64_t current_index;
     189             :     MOVIndexRange* index_ranges;
     190             :     MOVIndexRange* current_index_range;
     191             :     unsigned int bytes_per_frame;
     192             :     unsigned int samples_per_frame;
     193             :     int dv_audio_container;
     194             :     int pseudo_stream_id; ///< -1 means demux all ids
     195             :     int16_t audio_cid;    ///< stsd audio compression id
     196             :     unsigned drefs_count;
     197             :     MOVDref *drefs;
     198             :     int dref_id;
     199             :     int timecode_track;
     200             :     int width;            ///< tkhd width
     201             :     int height;           ///< tkhd height
     202             :     int dts_shift;        ///< dts shift when ctts is negative
     203             :     uint32_t palette[256];
     204             :     int has_palette;
     205             :     int64_t data_size;
     206             :     uint32_t tmcd_flags;  ///< tmcd track flags
     207             :     int64_t track_end;    ///< used for dts generation in fragmented movie files
     208             :     int start_pad;        ///< amount of samples to skip due to enc-dec delay
     209             :     unsigned int rap_group_count;
     210             :     MOVSbgp *rap_group;
     211             : 
     212             :     int nb_frames_for_fps;
     213             :     int64_t duration_for_fps;
     214             : 
     215             :     /** extradata array (and size) for multiple stsd */
     216             :     uint8_t **extradata;
     217             :     int *extradata_size;
     218             :     int last_stsd_index;
     219             :     int stsd_count;
     220             : 
     221             :     int32_t *display_matrix;
     222             :     AVStereo3D *stereo3d;
     223             :     AVSphericalMapping *spherical;
     224             :     size_t spherical_size;
     225             :     AVMasteringDisplayMetadata *mastering;
     226             :     AVContentLightMetadata *coll;
     227             :     size_t coll_size;
     228             : 
     229             :     uint32_t format;
     230             : 
     231             :     int has_sidx;  // If there is an sidx entry for this stream.
     232             :     struct {
     233             :         struct AVAESCTR* aes_ctr;
     234             :         unsigned int per_sample_iv_size;  // Either 0, 8, or 16.
     235             :         AVEncryptionInfo *default_encrypted_sample;
     236             :         MOVEncryptionIndex *encryption_index;
     237             :     } cenc;
     238             : } MOVStreamContext;
     239             : 
     240             : typedef struct MOVContext {
     241             :     const AVClass *class; ///< class for private options
     242             :     AVFormatContext *fc;
     243             :     int time_scale;
     244             :     int64_t duration;     ///< duration of the longest track
     245             :     int found_moov;       ///< 'moov' atom has been found
     246             :     int found_mdat;       ///< 'mdat' atom has been found
     247             :     int found_hdlr_mdta;  ///< 'hdlr' atom with type 'mdta' has been found
     248             :     int trak_index;       ///< Index of the current 'trak'
     249             :     char **meta_keys;
     250             :     unsigned meta_keys_count;
     251             :     DVDemuxContext *dv_demux;
     252             :     AVFormatContext *dv_fctx;
     253             :     int isom;             ///< 1 if file is ISO Media (mp4/3gp)
     254             :     MOVFragment fragment; ///< current fragment in moof atom
     255             :     MOVTrackExt *trex_data;
     256             :     unsigned trex_count;
     257             :     int itunes_metadata;  ///< metadata are itunes style
     258             :     int handbrake_version;
     259             :     int *chapter_tracks;
     260             :     unsigned int nb_chapter_tracks;
     261             :     int use_absolute_path;
     262             :     int ignore_editlist;
     263             :     int advanced_editlist;
     264             :     int ignore_chapters;
     265             :     int seek_individually;
     266             :     int64_t next_root_atom; ///< offset of the next root atom
     267             :     int export_all;
     268             :     int export_xmp;
     269             :     int *bitrates;          ///< bitrates read before streams creation
     270             :     int bitrates_count;
     271             :     int moov_retry;
     272             :     int use_mfra_for;
     273             :     int has_looked_for_mfra;
     274             :     MOVFragmentIndex frag_index;
     275             :     int atom_depth;
     276             :     unsigned int aax_mode;  ///< 'aax' file has been detected
     277             :     uint8_t file_key[20];
     278             :     uint8_t file_iv[20];
     279             :     void *activation_bytes;
     280             :     int activation_bytes_size;
     281             :     void *audible_fixed_key;
     282             :     int audible_fixed_key_size;
     283             :     struct AVAES *aes_decrypt;
     284             :     uint8_t *decryption_key;
     285             :     int decryption_key_len;
     286             :     int enable_drefs;
     287             :     int32_t movie_display_matrix[3][3]; ///< display matrix from mvhd
     288             : } MOVContext;
     289             : 
     290             : int ff_mp4_read_descr_len(AVIOContext *pb);
     291             : int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
     292             : int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
     293             : void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
     294             : 
     295             : #define MP4ODescrTag                    0x01
     296             : #define MP4IODescrTag                   0x02
     297             : #define MP4ESDescrTag                   0x03
     298             : #define MP4DecConfigDescrTag            0x04
     299             : #define MP4DecSpecificDescrTag          0x05
     300             : #define MP4SLDescrTag                   0x06
     301             : 
     302             : #define MOV_TFHD_BASE_DATA_OFFSET       0x01
     303             : #define MOV_TFHD_STSD_ID                0x02
     304             : #define MOV_TFHD_DEFAULT_DURATION       0x08
     305             : #define MOV_TFHD_DEFAULT_SIZE           0x10
     306             : #define MOV_TFHD_DEFAULT_FLAGS          0x20
     307             : #define MOV_TFHD_DURATION_IS_EMPTY  0x010000
     308             : #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
     309             : 
     310             : #define MOV_TRUN_DATA_OFFSET            0x01
     311             : #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04
     312             : #define MOV_TRUN_SAMPLE_DURATION       0x100
     313             : #define MOV_TRUN_SAMPLE_SIZE           0x200
     314             : #define MOV_TRUN_SAMPLE_FLAGS          0x400
     315             : #define MOV_TRUN_SAMPLE_CTS            0x800
     316             : 
     317             : #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
     318             : #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000
     319             : #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000
     320             : #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000
     321             : #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000
     322             : #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000
     323             : 
     324             : #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000
     325             : #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000
     326             : 
     327             : #define MOV_TKHD_FLAG_ENABLED       0x0001
     328             : #define MOV_TKHD_FLAG_IN_MOVIE      0x0002
     329             : #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004
     330             : #define MOV_TKHD_FLAG_IN_POSTER     0x0008
     331             : 
     332             : #define MOV_SAMPLE_DEPENDENCY_UNKNOWN 0x0
     333             : #define MOV_SAMPLE_DEPENDENCY_YES     0x1
     334             : #define MOV_SAMPLE_DEPENDENCY_NO      0x2
     335             : 
     336             : 
     337             : #define TAG_IS_AVCI(tag)                    \
     338             :     ((tag) == MKTAG('a', 'i', '5', 'p') ||  \
     339             :      (tag) == MKTAG('a', 'i', '5', 'q') ||  \
     340             :      (tag) == MKTAG('a', 'i', '5', '2') ||  \
     341             :      (tag) == MKTAG('a', 'i', '5', '3') ||  \
     342             :      (tag) == MKTAG('a', 'i', '5', '5') ||  \
     343             :      (tag) == MKTAG('a', 'i', '5', '6') ||  \
     344             :      (tag) == MKTAG('a', 'i', '1', 'p') ||  \
     345             :      (tag) == MKTAG('a', 'i', '1', 'q') ||  \
     346             :      (tag) == MKTAG('a', 'i', '1', '2') ||  \
     347             :      (tag) == MKTAG('a', 'i', '1', '3') ||  \
     348             :      (tag) == MKTAG('a', 'i', '1', '5') ||  \
     349             :      (tag) == MKTAG('a', 'i', '1', '6') ||  \
     350             :      (tag) == MKTAG('a', 'i', 'v', 'x') ||  \
     351             :      (tag) == MKTAG('A', 'V', 'i', 'n'))
     352             : 
     353             : 
     354             : int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb);
     355             : 
     356             : int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
     357             : void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
     358             : 
     359             : #define FF_MOV_FLAG_MFRA_AUTO -1
     360             : #define FF_MOV_FLAG_MFRA_DTS 1
     361             : #define FF_MOV_FLAG_MFRA_PTS 2
     362             : 
     363             : /**
     364             :  * Compute codec id for 'lpcm' tag.
     365             :  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
     366             :  */
     367           2 : static inline enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
     368             : {
     369             :     /* lpcm flags:
     370             :      * 0x1 = float
     371             :      * 0x2 = big-endian
     372             :      * 0x4 = signed
     373             :      */
     374           2 :     return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
     375             : }
     376             : 
     377             : #endif /* AVFORMAT_ISOM_H */

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