ffmpeg/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 /* the QuickTime file format is quite convoluted...
  41  * it has lots of index tables, each indexing something in another one...
  42  * Here we just use what is needed to read the chunks
  43  */
  44
  45 typedef struct MOVStts {
  46     int count;
  47     int duration;
  48 } MOVStts;
  49
  50 typedef struct MOVStsc {
  51     int first;
  52     int count;
  53     int id;
  54 } MOVStsc;
  55
  56 typedef struct MOVDref {
  57     uint32_t type;
  58     char *path;
  59     char *dir;
  60     char volume[28];
  61     char filename[64];
  62     int16_t nlvl_to, nlvl_from;
  63 } MOVDref;
  64
  65 typedef struct MOVAtom {
  66     uint32_t type;
  67     int64_t size; /* total size (excluding the size and type fields) */
  68 } MOVAtom;
  69
  70 struct MOVParseTableEntry;
  71
  72 typedef struct MOVFragment {
  73     unsigned track_id;
  74     uint64_t base_data_offset;
  75     uint64_t moof_offset;
  76     uint64_t implicit_offset;
  77     unsigned stsd_id;
  78     unsigned duration;
  79     unsigned size;
  80     unsigned flags;
  81 } MOVFragment;
  82
  83 typedef struct MOVTrackExt {
  84     unsigned track_id;
  85     unsigned stsd_id;
  86     unsigned duration;
  87     unsigned size;
  88     unsigned flags;
  89 } MOVTrackExt;
  90
  91 typedef struct MOVSbgp {
  92     unsigned int count;
  93     unsigned int index;
  94 } MOVSbgp;
  95
  96 typedef struct MOVStreamContext {
  97     AVIOContext *pb;
  98     int pb_is_copied;
  99     int ffindex;          ///< AVStream index
 100     int next_chunk;
 101     unsigned int chunk_count;
 102     int64_t *chunk_offsets;
 103     unsigned int stts_count;
 104     MOVStts *stts_data;
 105     unsigned int ctts_count;
 106     MOVStts *ctts_data;
 107     unsigned int stsc_count;
 108     MOVStsc *stsc_data;
 109     unsigned int stps_count;
 110     unsigned *stps_data;  ///< partial sync sample for mpeg-2 open gop
 111     int ctts_index;
 112     int ctts_sample;
 113     unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom
 114     unsigned int stsz_sample_size; ///< always contains sample size from stsz atom
 115     unsigned int sample_count;
 116     int *sample_sizes;
 117     int keyframe_absent;
 118     unsigned int keyframe_count;
 119     int *keyframes;
 120     int time_scale;
 121     int64_t empty_duration; ///< empty duration of the first edit list entry
 122     int64_t start_time;   ///< start time of the media
 123     int64_t time_offset;  ///< time offset of the edit list entries
 124     int current_sample;
 125     unsigned int bytes_per_frame;
 126     unsigned int samples_per_frame;
 127     int dv_audio_container;
 128     int pseudo_stream_id; ///< -1 means demux all ids
 129     int16_t audio_cid;    ///< stsd audio compression id
 130     unsigned drefs_count;
 131     MOVDref *drefs;
 132     int dref_id;
 133     int timecode_track;
 134     int wrong_dts;        ///< dts are wrong due to huge ctts offset (iMovie files)
 135     int width;            ///< tkhd width
 136     int height;           ///< tkhd height
 137     int dts_shift;        ///< dts shift when ctts is negative
 138     uint32_t palette[256];
 139     int has_palette;
 140     int64_t data_size;
 141     uint32_t tmcd_flags;  ///< tmcd track flags
 142     int64_t track_end;    ///< used for dts generation in fragmented movie files
 143     int start_pad;        ///< amount of samples to skip due to enc-dec delay
 144     unsigned int rap_group_count;
 145     MOVSbgp *rap_group;
 146
 147     int nb_frames_for_fps;
 148     int64_t duration_for_fps;
 149
 150     int32_t *display_matrix;
 151 } MOVStreamContext;
 152
 153 typedef struct MOVContext {
 154     AVClass *avclass;
 155     AVFormatContext *fc;
 156     int time_scale;
 157     int64_t duration;     ///< duration of the longest track
 158     int found_moov;       ///< 'moov' atom has been found
 159     int found_mdat;       ///< 'mdat' atom has been found
 160     DVDemuxContext *dv_demux;
 161     AVFormatContext *dv_fctx;
 162     int isom;             ///< 1 if file is ISO Media (mp4/3gp)
 163     MOVFragment fragment; ///< current fragment in moof atom
 164     MOVTrackExt *trex_data;
 165     unsigned trex_count;
 166     int itunes_metadata;  ///< metadata are itunes style
 167     int chapter_track;
 168     int use_absolute_path;
 169     int ignore_editlist;
 170     int64_t next_root_atom; ///< offset of the next root atom
 171     int *bitrates;          ///< bitrates read before streams creation
 172     int bitrates_count;
 173     int moov_retry;
 174 } MOVContext;
 175
 176 int ff_mp4_read_descr_len(AVIOContext *pb);
 177 int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag);
 178 int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb);
 179 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
 180
 181 #define MP4ODescrTag                    0x01
 182 #define MP4IODescrTag                   0x02
 183 #define MP4ESDescrTag                   0x03
 184 #define MP4DecConfigDescrTag            0x04
 185 #define MP4DecSpecificDescrTag          0x05
 186 #define MP4SLDescrTag                   0x06
 187
 188 #define MOV_TFHD_BASE_DATA_OFFSET       0x01
 189 #define MOV_TFHD_STSD_ID                0x02
 190 #define MOV_TFHD_DEFAULT_DURATION       0x08
 191 #define MOV_TFHD_DEFAULT_SIZE           0x10
 192 #define MOV_TFHD_DEFAULT_FLAGS          0x20
 193 #define MOV_TFHD_DURATION_IS_EMPTY  0x010000
 194 #define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000
 195
 196 #define MOV_TRUN_DATA_OFFSET            0x01
 197 #define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04
 198 #define MOV_TRUN_SAMPLE_DURATION       0x100
 199 #define MOV_TRUN_SAMPLE_SIZE           0x200
 200 #define MOV_TRUN_SAMPLE_FLAGS          0x400
 201 #define MOV_TRUN_SAMPLE_CTS            0x800
 202
 203 #define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff
 204 #define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC               0x00010000
 205 #define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK              0x000e0000
 206 #define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK           0x00300000
 207 #define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK             0x00c00000
 208 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK              0x03000000
 209
 210 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO                0x02000000
 211 #define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES               0x01000000
 212
 213 #define MOV_TKHD_FLAG_ENABLED       0x0001
 214 #define MOV_TKHD_FLAG_IN_MOVIE      0x0002
 215 #define MOV_TKHD_FLAG_IN_PREVIEW    0x0004
 216 #define MOV_TKHD_FLAG_IN_POSTER     0x0008
 217
 218 #define TAG_IS_AVCI(tag)                    \
 219     ((tag) == MKTAG('a', 'i', '5', 'p') ||  \
 220      (tag) == MKTAG('a', 'i', '5', 'q') ||  \
 221      (tag) == MKTAG('a', 'i', '5', '2') ||  \
 222      (tag) == MKTAG('a', 'i', '5', '3') ||  \
 223      (tag) == MKTAG('a', 'i', '5', '5') ||  \
 224      (tag) == MKTAG('a', 'i', '5', '6') ||  \
 225      (tag) == MKTAG('a', 'i', '1', 'p') ||  \
 226      (tag) == MKTAG('a', 'i', '1', 'q') ||  \
 227      (tag) == MKTAG('a', 'i', '1', '2') ||  \
 228      (tag) == MKTAG('a', 'i', '1', '3') ||  \
 229      (tag) == MKTAG('a', 'i', '1', '5') ||  \
 230      (tag) == MKTAG('a', 'i', '1', '6') ||  \
 231      (tag) == MKTAG('A', 'V', 'i', 'n'))
 232
 233
 234 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb);
 235 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
 236
 237 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
 238 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout);
 239
 240 #endif /* AVFORMAT_ISOM_H */