libavformat/isom.h

   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     int found_tfhd;
  82     unsigned track_id;
  83     uint64_t base_data_offset;
  84     uint64_t moof_offset;
  85     uint64_t implicit_offset;
  86     unsigned stsd_id;
  87     unsigned duration;
  88     unsigned size;
  89     unsigned flags;
  90     int64_t time;
  91 } MOVFragment;
  92
  93 typedef struct MOVTrackExt {
  94     unsigned track_id;
  95     unsigned stsd_id;
  96     unsigned duration;
  97     unsigned size;
  98     unsigned flags;
  99 } MOVTrackExt;
 100
 101 typedef struct MOVSbgp {
 102     unsigned int count;
 103     unsigned int index;
 104 } MOVSbgp;
 105
 106 typedef struct MOVFragmentIndexItem {
 107     int64_t moof_offset;
 108     int64_t time;
 109     int headers_read;
 110 } MOVFragmentIndexItem;
 111
 112 typedef struct MOVFragmentIndex {
 113     unsigned track_id;
 114     unsigned item_count;
 115     unsigned current_item;
 116     MOVFragmentIndexItem *items;
 117 } MOVFragmentIndex;
 118
 119 typedef struct MOVStreamContext {
 120     AVIOContext *pb;
 121     int pb_is_copied;
 122     int ffindex;          ///< AVStream index
 123     int next_chunk;
 124     unsigned int chunk_count;
 125     int64_t *chunk_offsets;
 126     unsigned int stts_count;
 127     MOVStts *stts_data;
 128     unsigned int ctts_count;
 129     MOVStts *ctts_data;
 130     unsigned int stsc_count;
 131     MOVStsc *stsc_data;
 132     int stsc_index;
 133     int stsc_sample;
 134     unsigned int stps_count;
 135     unsigned *stps_data;  ///< partial sync sample for mpeg-2 open gop
 136     MOVElst *elst_data;
 137     unsigned int elst_count;
 138     int ctts_index;
 139     int ctts_sample;
 140     unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
 141     unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
 142     unsigned int sample_count;
 143     int *sample_sizes;
 144     int keyframe_absent;
 145     unsigned int keyframe_count;
 146     int *keyframes;
 147     int time_scale;
 148     int64_t time_offset;  ///< time offset of the edit list entries
 149     int current_sample;
 150     unsigned int bytes_per_frame;
 151     unsigned int samples_per_frame;
 152     int dv_audio_container;
 153     int pseudo_stream_id; ///< -1 means demux all ids
 154     int16_t audio_cid;    ///< stsd audio compression id
 155     unsigned drefs_count;
 156     MOVDref *drefs;
 157     int dref_id;
 158     int timecode_track;
 159     int width;            ///< tkhd width
 160     int height;           ///< tkhd height
 161     int dts_shift;        ///< dts shift when ctts is negative
 162     uint32_t palette[256];
 163     int has_palette;
 164     int64_t data_size;
 165     uint32_t tmcd_flags;  ///< tmcd track flags
 166     int64_t track_end;    ///< used for dts generation in fragmented movie files
 167     int start_pad;        ///< amount of samples to skip due to enc-dec delay
 168     unsigned int rap_group_count;
 169     MOVSbgp *rap_group;
 170
 171     int nb_frames_for_fps;
 172     int64_t duration_for_fps;
 173
 174     /** extradata array (and size) for multiple stsd */
 175     uint8_t **extradata;
 176     int *extradata_size;
 177     int last_stsd_index;
 178     int stsd_count;
 179
 180     int32_t *display_matrix;
 181     uint32_t format;
 182
 183     struct {
 184         int use_subsamples;
 185         uint8_t* auxiliary_info;
 186         uint8_t* auxiliary_info_end;
 187         uint8_t* auxiliary_info_pos;
 188         uint8_t auxiliary_info_default_size;
 189         uint8_t* auxiliary_info_sizes;
 190         size_t auxiliary_info_sizes_count;
 191         struct AVAESCTR* aes_ctr;
 192     } cenc;
 193 } MOVStreamContext;
 194
 195 typedef struct MOVContext {
 196     const AVClass *class; ///< class for private options
 197     AVFormatContext *fc;
 198     int time_scale;
 199     int64_t duration;     ///< duration of the longest track
 200     int found_moov;       ///< 'moov' atom has been found
 201     int found_mdat;       ///< 'mdat' atom has been found
 202     int found_hdlr_mdta;  ///< 'hdlr' atom with type 'mdta' has been found
 203     int trak_index;       ///< Index of the current 'trak'
 204     char **meta_keys;
 205     unsigned meta_keys_count;
 206     DVDemuxContext *dv_demux;
 207     AVFormatContext *dv_fctx;
 208     int isom;             ///< 1 if file is ISO Media (mp4/3gp)
 209     MOVFragment fragment; ///< current fragment in moof atom
 210     MOVTrackExt *trex_data;
 211     unsigned trex_count;
 212     int itunes_metadata;  ///< metadata are itunes style
 213     int handbrake_version;
 214     int *chapter_tracks;
 215     unsigned int nb_chapter_tracks;
 216     int use_absolute_path;
 217     int ignore_editlist;
 218     int ignore_chapters;
 219     int seek_individually;
 220     int64_t next_root_atom; ///< offset of the next root atom
 221     int export_all;
 222     int export_xmp;
 223     int *bitrates;          ///< bitrates read before streams creation
 224     int bitrates_count;
 225     int moov_retry;
 226     int use_mfra_for;
 227     int has_looked_for_mfra;
 228     MOVFragmentIndex** fragment_index_data;
 229     unsigned fragment_index_count;
 230     int fragment_index_complete;
 231     int atom_depth;
 232     unsigned int aax_mode;  ///< 'aax' file has been detected
 233     uint8_t file_key[20];
 234     uint8_t file_iv[20];
 235     void *activation_bytes;
 236     int activation_bytes_size;
 237     void *audible_fixed_key;
 238     int audible_fixed_key_size;
 239     struct AVAES *aes_decrypt;
 240     uint8_t *decryption_key;
 241     int decryption_key_len;
 242     int enable_drefs;
 243 } MOVContext;
 244
 245 int ff_mp4_read_descr_len(AVIOContext *pb);
 246 int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
 247 int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
 248 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
 249
 250 #define MP4ODescrTag                    0x01
 251 #define MP4IODescrTag                   0x02
 252 #define MP4ESDescrTag                   0x03
 253 #define MP4DecConfigDescrTag            0x04
 254 #define MP4DecSpecificDescrTag          0x05
 255 #define MP4SLDescrTag                   0x06
 256
 257 #define MOV_TFHD_BASE_DATA_OFFSET       0x01
 258 #define MOV_TFHD_STSD_ID                0x02
 259 #define MOV_TFHD_DEFAULT_DURATION       0x08
 260 #define MOV_TFHD_DEFAULT_SIZE           0x10
 261 #define MOV_TFHD_DEFAULT_FLAGS          0x20
 262 #define MOV_TFHD_DURATION_IS_EMPTY  0x010000
 263 #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
 264
 265 #define MOV_TRUN_DATA_OFFSET            0x01
 266 #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04
 267 #define MOV_TRUN_SAMPLE_DURATION       0x100
 268 #define MOV_TRUN_SAMPLE_SIZE           0x200
 269 #define MOV_TRUN_SAMPLE_FLAGS          0x400
 270 #define MOV_TRUN_SAMPLE_CTS            0x800
 271
 272 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
 273 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000
 274 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000
 275 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000
 276 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000
 277 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000
 278
 279 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000
 280 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000
 281
 282 #define MOV_TKHD_FLAG_ENABLED       0x0001
 283 #define MOV_TKHD_FLAG_IN_MOVIE      0x0002
 284 #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004
 285 #define MOV_TKHD_FLAG_IN_POSTER     0x0008
 286
 287 #define TAG_IS_AVCI(tag)                    \
 288     ((tag) == MKTAG('a', 'i', '5', 'p') ||  \
 289      (tag) == MKTAG('a', 'i', '5', 'q') ||  \
 290      (tag) == MKTAG('a', 'i', '5', '2') ||  \
 291      (tag) == MKTAG('a', 'i', '5', '3') ||  \
 292      (tag) == MKTAG('a', 'i', '5', '5') ||  \
 293      (tag) == MKTAG('a', 'i', '5', '6') ||  \
 294      (tag) == MKTAG('a', 'i', '1', 'p') ||  \
 295      (tag) == MKTAG('a', 'i', '1', 'q') ||  \
 296      (tag) == MKTAG('a', 'i', '1', '2') ||  \
 297      (tag) == MKTAG('a', 'i', '1', '3') ||  \
 298      (tag) == MKTAG('a', 'i', '1', '5') ||  \
 299      (tag) == MKTAG('a', 'i', '1', '6') ||  \
 300      (tag) == MKTAG('a', 'i', 'v', 'x') ||  \
 301      (tag) == MKTAG('A', 'V', 'i', 'n'))
 302
 303
 304 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb);
 305 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
 306
 307 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
 308 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
 309
 310 #define FF_MOV_FLAG_MFRA_AUTO -1
 311 #define FF_MOV_FLAG_MFRA_DTS 1
 312 #define FF_MOV_FLAG_MFRA_PTS 2
 313
 314 #endif /* AVFORMAT_ISOM_H */