libavformat/mov.c

   1 /*
   2  * MOV demuxer
   3  * Copyright (c) 2001 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <limits.h>
  23
  24 //#define DEBUG
  25
  26 #include "libavutil/intreadwrite.h"
  27 #include "avformat.h"
  28 #include "riff.h"
  29 #include "isom.h"
  30 #include "dv.h"
  31 #include "libavcodec/mpeg4audio.h"
  32 #include "libavcodec/mpegaudiodata.h"
  33
  34 #if CONFIG_ZLIB
  35 #include <zlib.h>
  36 #endif
  37
  38 /*
  39  * First version by Francois Revol revol@free.fr
  40  * Seek function by Gael Chardon gael.dev@4now.net
  41  *
  42  * Features and limitations:
  43  * - reads most of the QT files I have (at least the structure),
  44  *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
  45  * - the code is quite ugly... maybe I won't do it recursive next time :-)
  46  *
  47  * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
  48  * when coding this :) (it's a writer anyway)
  49  *
  50  * Reference documents:
  51  * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
  52  * Apple:
  53  *  http://developer.apple.com/documentation/QuickTime/QTFF/
  54  *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
  55  * QuickTime is a trademark of Apple (AFAIK :))
  56  */
  57
  58 #include "qtpalette.h"
  59
  60
  61 #undef NDEBUG
  62 #include <assert.h>
  63
  64 /* the QuickTime file format is quite convoluted...
  65  * it has lots of index tables, each indexing something in another one...
  66  * Here we just use what is needed to read the chunks
  67  */
  68
  69 typedef struct {
  70     int first;
  71     int count;
  72     int id;
  73 } MOVStsc;
  74
  75 typedef struct {
  76     uint32_t type;
  77     char *path;
  78 } MOVDref;
  79
  80 typedef struct {
  81     uint32_t type;
  82     int64_t offset;
  83     int64_t size; /* total size (excluding the size and type fields) */
  84 } MOVAtom;
  85
  86 struct MOVParseTableEntry;
  87
  88 typedef struct {
  89     unsigned track_id;
  90     uint64_t base_data_offset;
  91     uint64_t moof_offset;
  92     unsigned stsd_id;
  93     unsigned duration;
  94     unsigned size;
  95     unsigned flags;
  96 } MOVFragment;
  97
  98 typedef struct {
  99     unsigned track_id;
 100     unsigned stsd_id;
 101     unsigned duration;
 102     unsigned size;
 103     unsigned flags;
 104 } MOVTrackExt;
 105
 106 typedef struct MOVStreamContext {
 107     ByteIOContext *pb;
 108     int ffindex; /* the ffmpeg stream id */
 109     int next_chunk;
 110     unsigned int chunk_count;
 111     int64_t *chunk_offsets;
 112     unsigned int stts_count;
 113     MOVStts *stts_data;
 114     unsigned int ctts_count;
 115     MOVStts *ctts_data;
 116     unsigned int edit_count; /* number of 'edit' (elst atom) */
 117     unsigned int sample_to_chunk_sz;
 118     MOVStsc *sample_to_chunk;
 119     int sample_to_ctime_index;
 120     int sample_to_ctime_sample;
 121     unsigned int sample_size;
 122     unsigned int sample_count;
 123     int *sample_sizes;
 124     unsigned int keyframe_count;
 125     int *keyframes;
 126     int time_scale;
 127     int time_rate;
 128     int current_sample;
 129     unsigned int bytes_per_frame;
 130     unsigned int samples_per_frame;
 131     int dv_audio_container;
 132     int pseudo_stream_id; ///< -1 means demux all ids
 133     int16_t audio_cid; ///< stsd audio compression id
 134     unsigned drefs_count;
 135     MOVDref *drefs;
 136     int dref_id;
 137     int wrong_dts; ///< dts are wrong due to negative ctts
 138     int width;  ///< tkhd width
 139     int height; ///< tkhd height
 140 } MOVStreamContext;
 141
 142 typedef struct MOVContext {
 143     AVFormatContext *fc;
 144     int time_scale;
 145     int64_t duration; /* duration of the longest track */
 146     int found_moov; /* when both 'moov' and 'mdat' sections has been found */
 147     int found_mdat; /* we suppose we have enough data to read the file */
 148     AVPaletteControl palette_control;
 149     DVDemuxContext *dv_demux;
 150     AVFormatContext *dv_fctx;
 151     int isom; /* 1 if file is ISO Media (mp4/3gp) */
 152     MOVFragment fragment; ///< current fragment in moof atom
 153     MOVTrackExt *trex_data;
 154     unsigned trex_count;
 155     int itunes_metadata; ///< metadata are itunes style
 156 } MOVContext;
 157
 158
 159 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
 160
 161 /* those functions parse an atom */
 162 /* return code:
 163   0: continue to parse next atom
 164  <0: error occurred, exit
 165 */
 166 /* links atom IDs to parse functions */
 167 typedef struct MOVParseTableEntry {
 168     uint32_t type;
 169     int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
 170 } MOVParseTableEntry;
 171
 172 static const MOVParseTableEntry mov_default_parse_table[];
 173
 174 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 175 {
 176     int64_t total_size = 0;
 177     MOVAtom a;
 178     int i;
 179     int err = 0;
 180
 181     a.offset = atom.offset;
 182
 183     if (atom.size < 0)
 184         atom.size = INT64_MAX;
 185     while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
 186         a.size = atom.size;
 187         a.type=0;
 188         if(atom.size >= 8) {
 189             a.size = get_be32(pb);
 190             a.type = get_le32(pb);
 191         }
 192         total_size += 8;
 193         a.offset += 8;
 194         dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
 195                 a.type, (char*)&a.type, a.size, atom.size, total_size);
 196         if (a.size == 1) { /* 64 bit extended size */
 197             a.size = get_be64(pb) - 8;
 198             a.offset += 8;
 199             total_size += 8;
 200         }
 201         if (a.size == 0) {
 202             a.size = atom.size - total_size;
 203             if (a.size <= 8)
 204                 break;
 205         }
 206         a.size -= 8;
 207         if(a.size < 0)
 208             break;
 209         a.size = FFMIN(a.size, atom.size - total_size);
 210
 211         for (i = 0; mov_default_parse_table[i].type != 0
 212              && mov_default_parse_table[i].type != a.type; i++)
 213             /* empty */;
 214
 215         if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
 216             url_fskip(pb, a.size);
 217         } else {
 218             int64_t start_pos = url_ftell(pb);
 219             int64_t left;
 220             err = mov_default_parse_table[i].parse(c, pb, a);
 221             if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
 222                 break;
 223             left = a.size - url_ftell(pb) + start_pos;
 224             if (left > 0) /* skip garbage at atom end */
 225                 url_fskip(pb, left);
 226         }
 227
 228         a.offset += a.size;
 229         total_size += a.size;
 230     }
 231
 232     if (!err && total_size < atom.size && atom.size < 0x7ffff)
 233         url_fskip(pb, atom.size - total_size);
 234
 235     return err;
 236 }
 237
 238 static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 239 {
 240     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 241     MOVStreamContext *sc = st->priv_data;
 242     int entries, i, j;
 243
 244     get_be32(pb); // version + flags
 245     entries = get_be32(pb);
 246     if (entries >= UINT_MAX / sizeof(*sc->drefs))
 247         return -1;
 248     sc->drefs_count = entries;
 249     sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
 250
 251     for (i = 0; i < sc->drefs_count; i++) {
 252         MOVDref *dref = &sc->drefs[i];
 253         uint32_t size = get_be32(pb);
 254         int64_t next = url_ftell(pb) + size - 4;
 255
 256         dref->type = get_le32(pb);
 257         get_be32(pb); // version + flags
 258         dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
 259
 260         if (dref->type == MKTAG('a','l','i','s') && size > 150) {
 261             /* macintosh alias record */
 262             uint16_t volume_len, len;
 263             char volume[28];
 264             int16_t type;
 265
 266             url_fskip(pb, 10);
 267
 268             volume_len = get_byte(pb);
 269             volume_len = FFMIN(volume_len, 27);
 270             get_buffer(pb, volume, 27);
 271             volume[volume_len] = 0;
 272             av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
 273
 274             url_fskip(pb, 112);
 275
 276             for (type = 0; type != -1 && url_ftell(pb) < next; ) {
 277                 type = get_be16(pb);
 278                 len = get_be16(pb);
 279                 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
 280                 if (len&1)
 281                     len += 1;
 282                 if (type == 2) { // absolute path
 283                     av_free(dref->path);
 284                     dref->path = av_mallocz(len+1);
 285                     if (!dref->path)
 286                         return AVERROR(ENOMEM);
 287                     get_buffer(pb, dref->path, len);
 288                     if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
 289                         len -= volume_len;
 290                         memmove(dref->path, dref->path+volume_len, len);
 291                         dref->path[len] = 0;
 292                     }
 293                     for (j = 0; j < len; j++)
 294                         if (dref->path[j] == ':')
 295                             dref->path[j] = '/';
 296                     av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
 297                 } else
 298                     url_fskip(pb, len);
 299             }
 300         }
 301         url_fseek(pb, next, SEEK_SET);
 302     }
 303     return 0;
 304 }
 305
 306 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 307 {
 308     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 309     uint32_t type;
 310     uint32_t ctype;
 311
 312     get_byte(pb); /* version */
 313     get_be24(pb); /* flags */
 314
 315     /* component type */
 316     ctype = get_le32(pb);
 317     type = get_le32(pb); /* component subtype */
 318
 319     dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
 320             ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
 321     dprintf(c->fc, "stype= %c%c%c%c\n",
 322             *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
 323     if(!ctype)
 324         c->isom = 1;
 325     if     (type == MKTAG('v','i','d','e'))
 326         st->codec->codec_type = CODEC_TYPE_VIDEO;
 327     else if(type == MKTAG('s','o','u','n'))
 328         st->codec->codec_type = CODEC_TYPE_AUDIO;
 329     else if(type == MKTAG('m','1','a',' '))
 330         st->codec->codec_id = CODEC_ID_MP2;
 331     else if(type == MKTAG('s','u','b','p')) {
 332         st->codec->codec_type = CODEC_TYPE_SUBTITLE;
 333     }
 334     get_be32(pb); /* component  manufacture */
 335     get_be32(pb); /* component flags */
 336     get_be32(pb); /* component flags mask */
 337
 338     if(atom.size <= 24)
 339         return 0; /* nothing left to read */
 340
 341     url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
 342     return 0;
 343 }
 344
 345 static int mp4_read_descr_len(ByteIOContext *pb)
 346 {
 347     int len = 0;
 348     int count = 4;
 349     while (count--) {
 350         int c = get_byte(pb);
 351         len = (len << 7) | (c & 0x7f);
 352         if (!(c & 0x80))
 353             break;
 354     }
 355     return len;
 356 }
 357
 358 static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
 359 {
 360     int len;
 361     *tag = get_byte(pb);
 362     len = mp4_read_descr_len(pb);
 363     dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
 364     return len;
 365 }
 366
 367 #define MP4ESDescrTag                   0x03
 368 #define MP4DecConfigDescrTag            0x04
 369 #define MP4DecSpecificDescrTag          0x05
 370
 371 static const AVCodecTag mp4_audio_types[] = {
 372     { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
 373     { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
 374     { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
 375     { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
 376     { CODEC_ID_NONE,    0 },
 377 };
 378
 379 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 380 {
 381     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 382     int tag, len;
 383
 384     get_be32(pb); /* version + flags */
 385     len = mp4_read_descr(c, pb, &tag);
 386     if (tag == MP4ESDescrTag) {
 387         get_be16(pb); /* ID */
 388         get_byte(pb); /* priority */
 389     } else
 390         get_be16(pb); /* ID */
 391
 392     len = mp4_read_descr(c, pb, &tag);
 393     if (tag == MP4DecConfigDescrTag) {
 394         int object_type_id = get_byte(pb);
 395         get_byte(pb); /* stream type */
 396         get_be24(pb); /* buffer size db */
 397         get_be32(pb); /* max bitrate */
 398         get_be32(pb); /* avg bitrate */
 399
 400         st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
 401         dprintf(c->fc, "esds object type id %d\n", object_type_id);
 402         len = mp4_read_descr(c, pb, &tag);
 403         if (tag == MP4DecSpecificDescrTag) {
 404             dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
 405             if((uint64_t)len > (1<<30))
 406                 return -1;
 407             st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
 408             if (!st->codec->extradata)
 409                 return AVERROR(ENOMEM);
 410             get_buffer(pb, st->codec->extradata, len);
 411             st->codec->extradata_size = len;
 412             if (st->codec->codec_id == CODEC_ID_AAC) {
 413                 MPEG4AudioConfig cfg;
 414                 ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
 415                                          st->codec->extradata_size);
 416                 if (cfg.chan_config > 7)
 417                     return -1;
 418                 st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
 419                 if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
 420                     st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
 421                 else
 422                     st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
 423                 dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
 424                         "sample rate %d ext sample rate %d\n", st->codec->channels,
 425                         cfg.object_type, cfg.ext_object_type,
 426                         cfg.sample_rate, cfg.ext_sample_rate);
 427                 if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
 428                                                          cfg.object_type)))
 429                     st->codec->codec_id = CODEC_ID_AAC;
 430             }
 431         }
 432     }
 433     return 0;
 434 }
 435
 436 static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 437 {
 438     const int num = get_be32(pb);
 439     const int den = get_be32(pb);
 440     AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
 441     if (den != 0) {
 442         if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
 443             (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
 444             av_log(c->fc, AV_LOG_WARNING,
 445                    "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
 446                    st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
 447         st->sample_aspect_ratio.num = num;
 448         st->sample_aspect_ratio.den = den;
 449     }
 450     return 0;
 451 }
 452
 453 /* this atom contains actual media data */
 454 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 455 {
 456     if(atom.size == 0) /* wrong one (MP4) */
 457         return 0;
 458     c->found_mdat=1;
 459     return 0; /* now go for moov */
 460 }
 461
 462 static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 463 {
 464     uint32_t type = get_le32(pb);
 465
 466     if (type != MKTAG('q','t',' ',' '))
 467         c->isom = 1;
 468     av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
 469     get_be32(pb); /* minor version */
 470     url_fskip(pb, atom.size - 8);
 471     return 0;
 472 }
 473
 474 /* this atom should contain all header atoms */
 475 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 476 {
 477     if (mov_read_default(c, pb, atom) < 0)
 478         return -1;
 479     /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
 480     /* so we don't parse the whole file if over a network */
 481     c->found_moov=1;
 482     return 0; /* now go for mdat */
 483 }
 484
 485 static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 486 {
 487     c->fragment.moof_offset = url_ftell(pb) - 8;
 488     dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
 489     return mov_read_default(c, pb, atom);
 490 }
 491
 492 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 493 {
 494     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 495     MOVStreamContext *sc = st->priv_data;
 496     int version = get_byte(pb);
 497     unsigned lang;
 498
 499     if (version > 1)
 500         return -1; /* unsupported */
 501
 502     get_be24(pb); /* flags */
 503     if (version == 1) {
 504         get_be64(pb);
 505         get_be64(pb);
 506     } else {
 507         get_be32(pb); /* creation time */
 508         get_be32(pb); /* modification time */
 509     }
 510
 511     sc->time_scale = get_be32(pb);
 512     st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
 513
 514     lang = get_be16(pb); /* language */
 515     ff_mov_lang_to_iso639(lang, st->language);
 516     get_be16(pb); /* quality */
 517
 518     return 0;
 519 }
 520
 521 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 522 {
 523     int version = get_byte(pb); /* version */
 524     get_be24(pb); /* flags */
 525
 526     if (version == 1) {
 527         get_be64(pb);
 528         get_be64(pb);
 529     } else {
 530         get_be32(pb); /* creation time */
 531         get_be32(pb); /* modification time */
 532     }
 533     c->time_scale = get_be32(pb); /* time scale */
 534
 535     dprintf(c->fc, "time scale = %i\n", c->time_scale);
 536
 537     c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
 538     get_be32(pb); /* preferred scale */
 539
 540     get_be16(pb); /* preferred volume */
 541
 542     url_fskip(pb, 10); /* reserved */
 543
 544     url_fskip(pb, 36); /* display matrix */
 545
 546     get_be32(pb); /* preview time */
 547     get_be32(pb); /* preview duration */
 548     get_be32(pb); /* poster time */
 549     get_be32(pb); /* selection time */
 550     get_be32(pb); /* selection duration */
 551     get_be32(pb); /* current time */
 552     get_be32(pb); /* next track ID */
 553
 554     return 0;
 555 }
 556
 557 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 558 {
 559     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 560
 561     if((uint64_t)atom.size > (1<<30))
 562         return -1;
 563
 564     // currently SVQ3 decoder expect full STSD header - so let's fake it
 565     // this should be fixed and just SMI header should be passed
 566     av_free(st->codec->extradata);
 567     st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
 568     if (!st->codec->extradata)
 569         return AVERROR(ENOMEM);
 570     st->codec->extradata_size = 0x5a + atom.size;
 571     memcpy(st->codec->extradata, "SVQ3", 4); // fake
 572     get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
 573     dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
 574     return 0;
 575 }
 576
 577 static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 578 {
 579     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 580     int little_endian = get_be16(pb);
 581
 582     dprintf(c->fc, "enda %d\n", little_endian);
 583     if (little_endian == 1) {
 584         switch (st->codec->codec_id) {
 585         case CODEC_ID_PCM_S24BE:
 586             st->codec->codec_id = CODEC_ID_PCM_S24LE;
 587             break;
 588         case CODEC_ID_PCM_S32BE:
 589             st->codec->codec_id = CODEC_ID_PCM_S32LE;
 590             break;
 591         case CODEC_ID_PCM_F32BE:
 592             st->codec->codec_id = CODEC_ID_PCM_F32LE;
 593             break;
 594         case CODEC_ID_PCM_F64BE:
 595             st->codec->codec_id = CODEC_ID_PCM_F64LE;
 596             break;
 597         default:
 598             break;
 599         }
 600     }
 601     return 0;
 602 }
 603
 604 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
 605 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 606 {
 607     AVStream *st;
 608     uint64_t size;
 609     uint8_t *buf;
 610
 611     if (c->fc->nb_streams < 1) // will happen with jp2 files
 612         return 0;
 613     st= c->fc->streams[c->fc->nb_streams-1];
 614     size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
 615     if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
 616         return -1;
 617     buf= av_realloc(st->codec->extradata, size);
 618     if(!buf)
 619         return -1;
 620     st->codec->extradata= buf;
 621     buf+= st->codec->extradata_size;
 622     st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
 623     AV_WB32(       buf    , atom.size + 8);
 624     AV_WL32(       buf + 4, atom.type);
 625     get_buffer(pb, buf + 8, atom.size);
 626     return 0;
 627 }
 628
 629 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 630 {
 631     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 632
 633     if((uint64_t)atom.size > (1<<30))
 634         return -1;
 635
 636     if (st->codec->codec_id == CODEC_ID_QDM2) {
 637         // pass all frma atom to codec, needed at least for QDM2
 638         av_free(st->codec->extradata);
 639         st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
 640         if (!st->codec->extradata)
 641             return AVERROR(ENOMEM);
 642         st->codec->extradata_size = atom.size;
 643         get_buffer(pb, st->codec->extradata, atom.size);
 644     } else if (atom.size > 8) { /* to read frma, esds atoms */
 645         if (mov_read_default(c, pb, atom) < 0)
 646             return -1;
 647     } else
 648         url_fskip(pb, atom.size);
 649     return 0;
 650 }
 651
 652 /**
 653  * This function reads atom content and puts data in extradata without tag
 654  * nor size unlike mov_read_extradata.
 655  */
 656 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 657 {
 658     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 659
 660     if((uint64_t)atom.size > (1<<30))
 661         return -1;
 662
 663     av_free(st->codec->extradata);
 664     st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
 665     if (!st->codec->extradata)
 666         return AVERROR(ENOMEM);
 667     st->codec->extradata_size = atom.size;
 668     get_buffer(pb, st->codec->extradata, atom.size);
 669     return 0;
 670 }
 671
 672 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 673 {
 674     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 675     MOVStreamContext *sc = st->priv_data;
 676     unsigned int i, entries;
 677
 678     get_byte(pb); /* version */
 679     get_be24(pb); /* flags */
 680
 681     entries = get_be32(pb);
 682
 683     if(entries >= UINT_MAX/sizeof(int64_t))
 684         return -1;
 685
 686     sc->chunk_count = entries;
 687     sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
 688     if (!sc->chunk_offsets)
 689         return -1;
 690     if      (atom.type == MKTAG('s','t','c','o'))
 691         for(i=0; i<entries; i++)
 692             sc->chunk_offsets[i] = get_be32(pb);
 693     else if (atom.type == MKTAG('c','o','6','4'))
 694         for(i=0; i<entries; i++)
 695             sc->chunk_offsets[i] = get_be64(pb);
 696     else
 697         return -1;
 698
 699     return 0;
 700 }
 701
 702 /**
 703  * Compute codec id for 'lpcm' tag.
 704  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
 705  */
 706 static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
 707 {
 708     if (flags & 1) { // floating point
 709         if (flags & 2) { // big endian
 710             if      (bps == 32) return CODEC_ID_PCM_F32BE;
 711             else if (bps == 64) return CODEC_ID_PCM_F64BE;
 712         } else {
 713             if      (bps == 32) return CODEC_ID_PCM_F32LE;
 714             else if (bps == 64) return CODEC_ID_PCM_F64LE;
 715         }
 716     } else {
 717         if (flags & 2) {
 718             if      (bps == 8)
 719                 // signed integer
 720                 if (flags & 4)  return CODEC_ID_PCM_S8;
 721                 else            return CODEC_ID_PCM_U8;
 722             else if (bps == 16) return CODEC_ID_PCM_S16BE;
 723             else if (bps == 24) return CODEC_ID_PCM_S24BE;
 724             else if (bps == 32) return CODEC_ID_PCM_S32BE;
 725         } else {
 726             if      (bps == 8)
 727                 if (flags & 4)  return CODEC_ID_PCM_S8;
 728                 else            return CODEC_ID_PCM_U8;
 729             else if (bps == 16) return CODEC_ID_PCM_S16LE;
 730             else if (bps == 24) return CODEC_ID_PCM_S24LE;
 731             else if (bps == 32) return CODEC_ID_PCM_S32LE;
 732         }
 733     }
 734     return CODEC_ID_NONE;
 735 }
 736
 737 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 738 {
 739     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
 740     MOVStreamContext *sc = st->priv_data;
 741     int j, entries, pseudo_stream_id;
 742
 743     get_byte(pb); /* version */
 744     get_be24(pb); /* flags */
 745
 746     entries = get_be32(pb);
 747
 748     for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
 749         //Parsing Sample description table
 750         enum CodecID id;
 751         int dref_id;
 752         MOVAtom a = { 0, 0, 0 };
 753         int64_t start_pos = url_ftell(pb);
 754         int size = get_be32(pb); /* size */
 755         uint32_t format = get_le32(pb); /* data format */
 756
 757         get_be32(pb); /* reserved */
 758         get_be16(pb); /* reserved */
 759         dref_id = get_be16(pb);
 760
 761         if (st->codec->codec_tag &&
 762             st->codec->codec_tag != format &&
 763             (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
 764                                    : st->codec->codec_tag != MKTAG('j','p','e','g'))
 765            ){
 766             /* Multiple fourcc, we skip JPEG. This is not correct, we should
 767              * export it as a separate AVStream but this needs a few changes
 768              * in the MOV demuxer, patch welcome. */
 769             av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
 770             url_fskip(pb, size - (url_ftell(pb) - start_pos));
 771             continue;
 772         }
 773         sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
 774         sc->dref_id= dref_id;
 775
 776         st->codec->codec_tag = format;
 777         id = codec_get_id(codec_movaudio_tags, format);
 778         if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
 779             id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
 780
 781         if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
 782             st->codec->codec_type = CODEC_TYPE_AUDIO;
 783         } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
 784                    format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
 785             id = codec_get_id(codec_movvideo_tags, format);
 786             if (id <= 0)
 787                 id = codec_get_id(codec_bmp_tags, format);
 788             if (id > 0)
 789                 st->codec->codec_type = CODEC_TYPE_VIDEO;
 790             else if(st->codec->codec_type == CODEC_TYPE_DATA){
 791                 id = codec_get_id(ff_codec_movsubtitle_tags, format);
 792                 if(id > 0)
 793                     st->codec->codec_type = CODEC_TYPE_SUBTITLE;
 794             }
 795         }
 796
 797         dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
 798                 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
 799                 (format >> 24) & 0xff, st->codec->codec_type);
 800
 801         if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
 802             uint8_t codec_name[32];
 803             unsigned int color_depth;
 804             int color_greyscale;
 805
 806             st->codec->codec_id = id;
 807             get_be16(pb); /* version */
 808             get_be16(pb); /* revision level */
 809             get_be32(pb); /* vendor */
 810             get_be32(pb); /* temporal quality */
 811             get_be32(pb); /* spatial quality */
 812
 813             st->codec->width = get_be16(pb); /* width */
 814             st->codec->height = get_be16(pb); /* height */
 815
 816             get_be32(pb); /* horiz resolution */
 817             get_be32(pb); /* vert resolution */
 818             get_be32(pb); /* data size, always 0 */
 819             get_be16(pb); /* frames per samples */
 820
 821             get_buffer(pb, codec_name, 32); /* codec name, pascal string */
 822             if (codec_name[0] <= 31) {
 823                 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
 824                 st->codec->codec_name[codec_name[0]] = 0;
 825             }
 826
 827             st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
 828             st->codec->color_table_id = get_be16(pb); /* colortable id */
 829             dprintf(c->fc, "depth %d, ctab id %d\n",
 830                    st->codec->bits_per_coded_sample, st->codec->color_table_id);
 831             /* figure out the palette situation */
 832             color_depth = st->codec->bits_per_coded_sample & 0x1F;
 833             color_greyscale = st->codec->bits_per_coded_sample & 0x20;
 834
 835             /* if the depth is 2, 4, or 8 bpp, file is palettized */
 836             if ((color_depth == 2) || (color_depth == 4) ||
 837                 (color_depth == 8)) {
 838                 /* for palette traversal */
 839                 unsigned int color_start, color_count, color_end;
 840                 unsigned char r, g, b;
 841
 842                 if (color_greyscale) {
 843                     int color_index, color_dec;
 844                     /* compute the greyscale palette */
 845                     st->codec->bits_per_coded_sample = color_depth;
 846                     color_count = 1 << color_depth;
 847                     color_index = 255;
 848                     color_dec = 256 / (color_count - 1);
 849                     for (j = 0; j < color_count; j++) {
 850                         r = g = b = color_index;
 851                         c->palette_control.palette[j] =
 852                             (r << 16) | (g << 8) | (b);
 853                         color_index -= color_dec;
 854                         if (color_index < 0)
 855                             color_index = 0;
 856                     }
 857                 } else if (st->codec->color_table_id) {
 858                     const uint8_t *color_table;
 859                     /* if flag bit 3 is set, use the default palette */
 860                     color_count = 1 << color_depth;
 861                     if (color_depth == 2)
 862                         color_table = ff_qt_default_palette_4;
 863                     else if (color_depth == 4)
 864                         color_table = ff_qt_default_palette_16;
 865                     else
 866                         color_table = ff_qt_default_palette_256;
 867
 868                     for (j = 0; j < color_count; j++) {
 869                         r = color_table[j * 4 + 0];
 870                         g = color_table[j * 4 + 1];
 871                         b = color_table[j * 4 + 2];
 872                         c->palette_control.palette[j] =
 873                             (r << 16) | (g << 8) | (b);
 874                     }
 875                 } else {
 876                     /* load the palette from the file */
 877                     color_start = get_be32(pb);
 878                     color_count = get_be16(pb);
 879                     color_end = get_be16(pb);
 880                     if ((color_start <= 255) &&
 881                         (color_end <= 255)) {
 882                         for (j = color_start; j <= color_end; j++) {
 883                             /* each R, G, or B component is 16 bits;
 884                              * only use the top 8 bits; skip alpha bytes
 885                              * up front */
 886                             get_byte(pb);
 887                             get_byte(pb);
 888                             r = get_byte(pb);
 889                             get_byte(pb);
 890                             g = get_byte(pb);
 891                             get_byte(pb);
 892                             b = get_byte(pb);
 893                             get_byte(pb);
 894                             c->palette_control.palette[j] =
 895                                 (r << 16) | (g << 8) | (b);
 896                         }
 897                     }
 898                 }
 899                 st->codec->palctrl = &c->palette_control;
 900                 st->codec->palctrl->palette_changed = 1;
 901             } else
 902                 st->codec->palctrl = NULL;
 903         } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
 904             int bits_per_sample, flags;
 905             uint16_t version = get_be16(pb);
 906
 907             st->codec->codec_id = id;
 908             get_be16(pb); /* revision level */
 909             get_be32(pb); /* vendor */
 910
 911             st->codec->channels = get_be16(pb);             /* channel count */
 912             dprintf(c->fc, "audio channels %d\n", st->codec->channels);
 913             st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
 914
 915             sc->audio_cid = get_be16(pb);
 916             get_be16(pb); /* packet size = 0 */
 917
 918             st->codec->sample_rate = ((get_be32(pb) >> 16));
 919
 920             //Read QT version 1 fields. In version 0 these do not exist.
 921             dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
 922             if(!c->isom) {
 923                 if(version==1) {
 924                     sc->samples_per_frame = get_be32(pb);
 925                     get_be32(pb); /* bytes per packet */
 926                     sc->bytes_per_frame = get_be32(pb);
 927                     get_be32(pb); /* bytes per sample */
 928                 } else if(version==2) {
 929                     get_be32(pb); /* sizeof struct only */
 930                     st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
 931                     st->codec->channels = get_be32(pb);
 932                     get_be32(pb); /* always 0x7F000000 */
 933                     st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
 934                     flags = get_be32(pb); /* lcpm format specific flag */
 935                     sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
 936                     sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
 937                     if (format == MKTAG('l','p','c','m'))
 938                         st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
 939                 }
 940             }
 941
 942             switch (st->codec->codec_id) {
 943             case CODEC_ID_PCM_S8:
 944             case CODEC_ID_PCM_U8:
 945                 if (st->codec->bits_per_coded_sample == 16)
 946                     st->codec->codec_id = CODEC_ID_PCM_S16BE;
 947                 break;
 948             case CODEC_ID_PCM_S16LE:
 949             case CODEC_ID_PCM_S16BE:
 950                 if (st->codec->bits_per_coded_sample == 8)
 951                     st->codec->codec_id = CODEC_ID_PCM_S8;
 952                 else if (st->codec->bits_per_coded_sample == 24)
 953                     st->codec->codec_id =
 954                         st->codec->codec_id == CODEC_ID_PCM_S16BE ?
 955                         CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
 956                 break;
 957             /* set values for old format before stsd version 1 appeared */
 958             case CODEC_ID_MACE3:
 959                 sc->samples_per_frame = 6;
 960                 sc->bytes_per_frame = 2*st->codec->channels;
 961                 break;
 962             case CODEC_ID_MACE6:
 963                 sc->samples_per_frame = 6;
 964                 sc->bytes_per_frame = 1*st->codec->channels;
 965                 break;
 966             case CODEC_ID_ADPCM_IMA_QT:
 967                 sc->samples_per_frame = 64;
 968                 sc->bytes_per_frame = 34*st->codec->channels;
 969                 break;
 970             case CODEC_ID_GSM:
 971                 sc->samples_per_frame = 160;
 972                 sc->bytes_per_frame = 33;
 973                 break;
 974             default:
 975                 break;
 976             }
 977
 978             bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
 979             if (bits_per_sample) {
 980                 st->codec->bits_per_coded_sample = bits_per_sample;
 981                 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
 982             }
 983         } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
 984             // ttxt stsd contains display flags, justification, background
 985             // color, fonts, and default styles, so fake an atom to read it
 986             MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
 987             mov_read_glbl(c, pb, fake_atom);
 988             st->codec->codec_id= id;
 989             st->codec->width = sc->width;
 990             st->codec->height = sc->height;
 991         } else {
 992             /* other codec type, just skip (rtp, mp4s, tmcd ...) */
 993             url_fskip(pb, size - (url_ftell(pb) - start_pos));
 994         }
 995         /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
 996         a.size = size - (url_ftell(pb) - start_pos);
 997         if (a.size > 8) {
 998             if (mov_read_default(c, pb, a) < 0)
 999                 return -1;
1000         } else if (a.size > 0)
1001             url_fskip(pb, a.size);
1002     }
1003
1004     if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1005         st->codec->sample_rate= sc->time_scale;
1006
1007     /* special codec parameters handling */
1008     switch (st->codec->codec_id) {
1009 #if CONFIG_DV_DEMUXER
1010     case CODEC_ID_DVAUDIO:
1011         c->dv_fctx = av_alloc_format_context();
1012         c->dv_demux = dv_init_demux(c->dv_fctx);
1013         if (!c->dv_demux) {
1014             av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1015             return -1;
1016         }
1017         sc->dv_audio_container = 1;
1018         st->codec->codec_id = CODEC_ID_PCM_S16LE;
1019         break;
1020 #endif
1021     /* no ifdef since parameters are always those */
1022     case CODEC_ID_QCELP:
1023         st->codec->frame_size= 160;
1024         st->codec->channels= 1; /* really needed */
1025         break;
1026     case CODEC_ID_AMR_NB:
1027     case CODEC_ID_AMR_WB:
1028         st->codec->frame_size= sc->samples_per_frame;
1029         st->codec->channels= 1; /* really needed */
1030         /* force sample rate for amr, stsd in 3gp does not store sample rate */
1031         if (st->codec->codec_id == CODEC_ID_AMR_NB)
1032             st->codec->sample_rate = 8000;
1033         else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1034             st->codec->sample_rate = 16000;
1035         break;
1036     case CODEC_ID_MP2:
1037     case CODEC_ID_MP3:
1038         st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1039         st->need_parsing = AVSTREAM_PARSE_FULL;
1040         break;
1041     case CODEC_ID_GSM:
1042     case CODEC_ID_ADPCM_MS:
1043     case CODEC_ID_ADPCM_IMA_WAV:
1044         st->codec->block_align = sc->bytes_per_frame;
1045         break;
1046     case CODEC_ID_ALAC:
1047         if (st->codec->extradata_size == 36) {
1048             st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1049             st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1050         }
1051         break;
1052     default:
1053         break;
1054     }
1055
1056     return 0;
1057 }
1058
1059 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1060 {
1061     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1062     MOVStreamContext *sc = st->priv_data;
1063     unsigned int i, entries;
1064
1065     get_byte(pb); /* version */
1066     get_be24(pb); /* flags */
1067
1068     entries = get_be32(pb);
1069
1070     if(entries >= UINT_MAX / sizeof(*sc->sample_to_chunk))
1071         return -1;
1072
1073     dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1074
1075     sc->sample_to_chunk_sz = entries;
1076     sc->sample_to_chunk = av_malloc(entries * sizeof(*sc->sample_to_chunk));
1077     if (!sc->sample_to_chunk)
1078         return -1;
1079     for(i=0; i<entries; i++) {
1080         sc->sample_to_chunk[i].first = get_be32(pb);
1081         sc->sample_to_chunk[i].count = get_be32(pb);
1082         sc->sample_to_chunk[i].id = get_be32(pb);
1083     }
1084     return 0;
1085 }
1086
1087 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1088 {
1089     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1090     MOVStreamContext *sc = st->priv_data;
1091     unsigned int i, entries;
1092
1093     get_byte(pb); /* version */
1094     get_be24(pb); /* flags */
1095
1096     entries = get_be32(pb);
1097
1098     if(entries >= UINT_MAX / sizeof(int))
1099         return -1;
1100
1101     sc->keyframe_count = entries;
1102
1103     dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1104
1105     sc->keyframes = av_malloc(entries * sizeof(int));
1106     if (!sc->keyframes)
1107         return -1;
1108     for(i=0; i<entries; i++) {
1109         sc->keyframes[i] = get_be32(pb);
1110         //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1111     }
1112     return 0;
1113 }
1114
1115 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1116 {
1117     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1118     MOVStreamContext *sc = st->priv_data;
1119     unsigned int i, entries, sample_size;
1120
1121     get_byte(pb); /* version */
1122     get_be24(pb); /* flags */
1123
1124     sample_size = get_be32(pb);
1125     if (!sc->sample_size) /* do not overwrite value computed in stsd */
1126         sc->sample_size = sample_size;
1127     entries = get_be32(pb);
1128     if(entries >= UINT_MAX / sizeof(int))
1129         return -1;
1130
1131     sc->sample_count = entries;
1132     if (sample_size)
1133         return 0;
1134
1135     dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1136
1137     sc->sample_sizes = av_malloc(entries * sizeof(int));
1138     if (!sc->sample_sizes)
1139         return -1;
1140     for(i=0; i<entries; i++)
1141         sc->sample_sizes[i] = get_be32(pb);
1142     return 0;
1143 }
1144
1145 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1146 {
1147     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1148     MOVStreamContext *sc = st->priv_data;
1149     unsigned int i, entries;
1150     int64_t duration=0;
1151     int64_t total_sample_count=0;
1152
1153     get_byte(pb); /* version */
1154     get_be24(pb); /* flags */
1155     entries = get_be32(pb);
1156     if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1157         return -1;
1158
1159     sc->stts_count = entries;
1160     sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1161     if (!sc->stts_data)
1162         return -1;
1163     dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1164
1165     sc->time_rate=0;
1166
1167     for(i=0; i<entries; i++) {
1168         int sample_duration;
1169         int sample_count;
1170
1171         sample_count=get_be32(pb);
1172         sample_duration = get_be32(pb);
1173         sc->stts_data[i].count= sample_count;
1174         sc->stts_data[i].duration= sample_duration;
1175
1176         sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1177
1178         dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1179
1180         duration+=(int64_t)sample_duration*sample_count;
1181         total_sample_count+=sample_count;
1182     }
1183
1184     st->nb_frames= total_sample_count;
1185     if(duration)
1186         st->duration= duration;
1187     return 0;
1188 }
1189
1190 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1191 {
1192     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1193     MOVStreamContext *sc = st->priv_data;
1194     unsigned int i, entries;
1195
1196     get_byte(pb); /* version */
1197     get_be24(pb); /* flags */
1198     entries = get_be32(pb);
1199     if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1200         return -1;
1201
1202     sc->ctts_count = entries;
1203     sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1204     if (!sc->ctts_data)
1205         return -1;
1206     dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1207
1208     for(i=0; i<entries; i++) {
1209         int count    =get_be32(pb);
1210         int duration =get_be32(pb);
1211
1212         if (duration < 0) {
1213             sc->wrong_dts = 1;
1214             st->codec->has_b_frames = 1;
1215         }
1216         sc->ctts_data[i].count   = count;
1217         sc->ctts_data[i].duration= duration;
1218
1219         sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1220     }
1221     return 0;
1222 }
1223
1224 static void mov_build_index(MOVContext *mov, AVStream *st)
1225 {
1226     MOVStreamContext *sc = st->priv_data;
1227     int64_t current_offset;
1228     int64_t current_dts = 0;
1229     unsigned int stts_index = 0;
1230     unsigned int stsc_index = 0;
1231     unsigned int stss_index = 0;
1232     unsigned int i, j;
1233
1234     /* only use old uncompressed audio chunk demuxing when stts specifies it */
1235     if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1236           sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1237         unsigned int current_sample = 0;
1238         unsigned int stts_sample = 0;
1239         unsigned int keyframe, sample_size;
1240         unsigned int distance = 0;
1241         int key_off = sc->keyframes && sc->keyframes[0] == 1;
1242
1243         st->nb_frames = sc->sample_count;
1244         for (i = 0; i < sc->chunk_count; i++) {
1245             current_offset = sc->chunk_offsets[i];
1246             if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1247                 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1248                 stsc_index++;
1249             for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1250                 if (current_sample >= sc->sample_count) {
1251                     av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1252                     goto out;
1253                 }
1254                 keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1255                 if (keyframe) {
1256                     distance = 0;
1257                     if (stss_index + 1 < sc->keyframe_count)
1258                         stss_index++;
1259                 }
1260                 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1261                 if(sc->pseudo_stream_id == -1 ||
1262                    sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1263                     av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1264                                     keyframe ? AVINDEX_KEYFRAME : 0);
1265                     dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1266                             "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1267                             current_offset, current_dts, sample_size, distance, keyframe);
1268                 }
1269                 current_offset += sample_size;
1270                 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1271                 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1272                 distance++;
1273                 stts_sample++;
1274                 current_sample++;
1275                 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1276                     stts_sample = 0;
1277                     stts_index++;
1278                 }
1279             }
1280         }
1281     } else { /* read whole chunk */
1282         unsigned int chunk_samples, chunk_size, chunk_duration;
1283         unsigned int frames = 1;
1284         for (i = 0; i < sc->chunk_count; i++) {
1285             current_offset = sc->chunk_offsets[i];
1286             if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1287                 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1288                 stsc_index++;
1289             chunk_samples = sc->sample_to_chunk[stsc_index].count;
1290             /* get chunk size, beware of alaw/ulaw/mace */
1291             if (sc->samples_per_frame > 0 &&
1292                 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1293                 if (sc->samples_per_frame < 160)
1294                     chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1295                 else {
1296                     chunk_size = sc->bytes_per_frame;
1297                     frames = chunk_samples / sc->samples_per_frame;
1298                     chunk_samples = sc->samples_per_frame;
1299                 }
1300             } else
1301                 chunk_size = chunk_samples * sc->sample_size;
1302             for (j = 0; j < frames; j++) {
1303                 av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1304                 /* get chunk duration */
1305                 chunk_duration = 0;
1306                 while (chunk_samples > 0) {
1307                     if (chunk_samples < sc->stts_data[stts_index].count) {
1308                         chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1309                         sc->stts_data[stts_index].count -= chunk_samples;
1310                         break;
1311                     } else {
1312                         chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1313                         chunk_samples -= sc->stts_data[stts_index].count;
1314                         if (stts_index + 1 < sc->stts_count)
1315                             stts_index++;
1316                     }
1317                 }
1318                 current_offset += sc->bytes_per_frame;
1319                 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1320                         "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1321                         chunk_size, chunk_duration);
1322                 assert(chunk_duration % sc->time_rate == 0);
1323                 current_dts += chunk_duration / sc->time_rate;
1324             }
1325         }
1326     }
1327  out:
1328     /* adjust sample count to avindex entries */
1329     sc->sample_count = st->nb_index_entries;
1330 }
1331
1332 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1333 {
1334     AVStream *st;
1335     MOVStreamContext *sc;
1336     int ret;
1337
1338     st = av_new_stream(c->fc, c->fc->nb_streams);
1339     if (!st) return AVERROR(ENOMEM);
1340     sc = av_mallocz(sizeof(MOVStreamContext));
1341     if (!sc) return AVERROR(ENOMEM);
1342
1343     st->priv_data = sc;
1344     st->codec->codec_type = CODEC_TYPE_DATA;
1345     st->start_time = 0; /* XXX: check */
1346     sc->ffindex = st->index;
1347
1348     if ((ret = mov_read_default(c, pb, atom)) < 0)
1349         return ret;
1350
1351     /* sanity checks */
1352     if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1353                            (!sc->sample_size && !sc->sample_count))){
1354         av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1355                st->index);
1356         sc->sample_count = 0; //ignore track
1357         return 0;
1358     }
1359     if(!sc->time_rate)
1360         sc->time_rate=1;
1361     if(!sc->time_scale)
1362         sc->time_scale= c->time_scale;
1363     av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1364
1365     if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1366         !st->codec->frame_size && sc->stts_count == 1)
1367         st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1368
1369     if(st->duration != AV_NOPTS_VALUE){
1370         assert(st->duration % sc->time_rate == 0);
1371         st->duration /= sc->time_rate;
1372     }
1373
1374     mov_build_index(c, st);
1375
1376     if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1377         if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1378             av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1379                    st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1380     } else
1381         sc->pb = c->fc->pb;
1382
1383     switch (st->codec->codec_id) {
1384 #if CONFIG_H261_DECODER
1385     case CODEC_ID_H261:
1386 #endif
1387 #if CONFIG_H263_DECODER
1388     case CODEC_ID_H263:
1389 #endif
1390 #if CONFIG_MPEG4_DECODER
1391     case CODEC_ID_MPEG4:
1392 #endif
1393         st->codec->width= 0; /* let decoder init width/height */
1394         st->codec->height= 0;
1395         break;
1396     }
1397
1398     /* Do not need those anymore. */
1399     av_freep(&sc->chunk_offsets);
1400     av_freep(&sc->sample_to_chunk);
1401     av_freep(&sc->sample_sizes);
1402     av_freep(&sc->keyframes);
1403     av_freep(&sc->stts_data);
1404
1405     return 0;
1406 }
1407
1408 static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1409 {
1410     int ret;
1411     c->itunes_metadata = 1;
1412     ret = mov_read_default(c, pb, atom);
1413     c->itunes_metadata = 0;
1414     return ret;
1415 }
1416
1417 static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1418 {
1419     url_fskip(pb, 4); // version + flags
1420     atom.size -= 4;
1421     return mov_read_default(c, pb, atom);
1422 }
1423
1424 static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1425 {
1426     get_be32(pb); // type
1427     get_be32(pb); // unknown
1428     c->fc->track = get_be32(pb);
1429     dprintf(c->fc, "%.4s %d\n", (char*)&atom.type, c->fc->track);
1430     return 0;
1431 }
1432
1433 static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1434 {
1435     char *str = NULL;
1436     int size;
1437     uint16_t str_size;
1438
1439     if (c->itunes_metadata) {
1440         int data_size = get_be32(pb);
1441         int tag = get_le32(pb);
1442         if (tag == MKTAG('d','a','t','a')) {
1443             get_be32(pb); // type
1444             get_be32(pb); // unknown
1445             str_size = data_size - 16;
1446         } else return 0;
1447     } else {
1448         str_size = get_be16(pb); // string length
1449         get_be16(pb); // language
1450     }
1451     switch (atom.type) {
1452     case MKTAG(0xa9,'n','a','m'):
1453         str = c->fc->title; size = sizeof(c->fc->title); break;
1454     case MKTAG(0xa9,'A','R','T'):
1455     case MKTAG(0xa9,'w','r','t'):
1456         str = c->fc->author; size = sizeof(c->fc->author); break;
1457     case MKTAG(0xa9,'c','p','y'):
1458         str = c->fc->copyright; size = sizeof(c->fc->copyright); break;
1459     case MKTAG(0xa9,'c','m','t'):
1460     case MKTAG(0xa9,'i','n','f'):
1461         str = c->fc->comment; size = sizeof(c->fc->comment); break;
1462     case MKTAG(0xa9,'a','l','b'):
1463         str = c->fc->album; size = sizeof(c->fc->album); break;
1464     }
1465     if (!str)
1466         return 0;
1467     get_buffer(pb, str, FFMIN(size, str_size));
1468     dprintf(c->fc, "%.4s %s\n", (char*)&atom.type, str);
1469     return 0;
1470 }
1471
1472 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1473 {
1474     int i;
1475     int width;
1476     int height;
1477     int64_t disp_transform[2];
1478     int display_matrix[3][2];
1479     AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1480     MOVStreamContext *sc = st->priv_data;
1481     int version = get_byte(pb);
1482
1483     get_be24(pb); /* flags */
1484     /*
1485     MOV_TRACK_ENABLED 0x0001
1486     MOV_TRACK_IN_MOVIE 0x0002
1487     MOV_TRACK_IN_PREVIEW 0x0004
1488     MOV_TRACK_IN_POSTER 0x0008
1489     */
1490
1491     if (version == 1) {
1492         get_be64(pb);
1493         get_be64(pb);
1494     } else {
1495         get_be32(pb); /* creation time */
1496         get_be32(pb); /* modification time */
1497     }
1498     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1499     get_be32(pb); /* reserved */
1500     st->start_time = 0; /* check */
1501     /* highlevel (considering edits) duration in movie timebase */
1502     (version == 1) ? get_be64(pb) : get_be32(pb);
1503     get_be32(pb); /* reserved */
1504     get_be32(pb); /* reserved */
1505
1506     get_be16(pb); /* layer */
1507     get_be16(pb); /* alternate group */
1508     get_be16(pb); /* volume */
1509     get_be16(pb); /* reserved */
1510
1511     //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1512     // they're kept in fixed point format through all calculations
1513     // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1514     for (i = 0; i < 3; i++) {
1515         display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1516         display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1517         get_be32(pb);           // 2.30 fixed point (not used)
1518     }
1519
1520     width = get_be32(pb);       // 16.16 fixed point track width
1521     height = get_be32(pb);      // 16.16 fixed point track height
1522     sc->width = width >> 16;
1523     sc->height = height >> 16;
1524
1525     //transform the display width/height according to the matrix
1526     // skip this if the display matrix is the default identity matrix
1527     // to keep the same scale, use [width height 1<<16]
1528     if (width && height &&
1529         (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1530         display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1531         display_matrix[2][0]           || display_matrix[2][1])) {
1532         for (i = 0; i < 2; i++)
1533             disp_transform[i] =
1534                 (int64_t)  width  * display_matrix[0][i] +
1535                 (int64_t)  height * display_matrix[1][i] +
1536                 ((int64_t) display_matrix[2][i] << 16);
1537
1538         //sample aspect ratio is new width/height divided by old width/height
1539         st->sample_aspect_ratio = av_d2q(
1540             ((double) disp_transform[0] * height) /
1541             ((double) disp_transform[1] * width), INT_MAX);
1542     }
1543     return 0;
1544 }
1545
1546 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1547 {
1548     MOVFragment *frag = &c->fragment;
1549     MOVTrackExt *trex = NULL;
1550     int flags, track_id, i;
1551
1552     get_byte(pb); /* version */
1553     flags = get_be24(pb);
1554
1555     track_id = get_be32(pb);
1556     if (!track_id || track_id > c->fc->nb_streams)
1557         return -1;
1558     frag->track_id = track_id;
1559     for (i = 0; i < c->trex_count; i++)
1560         if (c->trex_data[i].track_id == frag->track_id) {
1561             trex = &c->trex_data[i];
1562             break;
1563         }
1564     if (!trex) {
1565         av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1566         return -1;
1567     }
1568
1569     if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1570     else              frag->base_data_offset = frag->moof_offset;
1571     if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1572     else              frag->stsd_id          = trex->stsd_id;
1573
1574     frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1575     frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1576     frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1577     dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1578     return 0;
1579 }
1580
1581 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1582 {
1583     MOVTrackExt *trex;
1584
1585     if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1586         return -1;
1587     c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1588     if (!c->trex_data)
1589         return AVERROR(ENOMEM);
1590     trex = &c->trex_data[c->trex_count++];
1591     get_byte(pb); /* version */
1592     get_be24(pb); /* flags */
1593     trex->track_id = get_be32(pb);
1594     trex->stsd_id  = get_be32(pb);
1595     trex->duration = get_be32(pb);
1596     trex->size     = get_be32(pb);
1597     trex->flags    = get_be32(pb);
1598     return 0;
1599 }
1600
1601 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1602 {
1603     MOVFragment *frag = &c->fragment;
1604     AVStream *st;
1605     MOVStreamContext *sc;
1606     uint64_t offset;
1607     int64_t dts;
1608     int data_offset = 0;
1609     unsigned entries, first_sample_flags = frag->flags;
1610     int flags, distance, i;
1611
1612     if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1613         return -1;
1614     st = c->fc->streams[frag->track_id-1];
1615     sc = st->priv_data;
1616     if (sc->pseudo_stream_id+1 != frag->stsd_id)
1617         return 0;
1618     get_byte(pb); /* version */
1619     flags = get_be24(pb);
1620     entries = get_be32(pb);
1621     dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1622     if (flags & 0x001) data_offset        = get_be32(pb);
1623     if (flags & 0x004) first_sample_flags = get_be32(pb);
1624     if (flags & 0x800) {
1625         if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1626             return -1;
1627         sc->ctts_data = av_realloc(sc->ctts_data,
1628                                    (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1629         if (!sc->ctts_data)
1630             return AVERROR(ENOMEM);
1631     }
1632     dts = st->duration;
1633     offset = frag->base_data_offset + data_offset;
1634     distance = 0;
1635     dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1636     for (i = 0; i < entries; i++) {
1637         unsigned sample_size = frag->size;
1638         int sample_flags = i ? frag->flags : first_sample_flags;
1639         unsigned sample_duration = frag->duration;
1640         int keyframe;
1641
1642         if (flags & 0x100) sample_duration = get_be32(pb);
1643         if (flags & 0x200) sample_size     = get_be32(pb);
1644         if (flags & 0x400) sample_flags    = get_be32(pb);
1645         if (flags & 0x800) {
1646             sc->ctts_data[sc->ctts_count].count = 1;
1647             sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1648             sc->ctts_count++;
1649         }
1650         if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1651              (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1652             distance = 0;
1653         av_add_index_entry(st, offset, dts, sample_size, distance,
1654                            keyframe ? AVINDEX_KEYFRAME : 0);
1655         dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1656                 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1657                 offset, dts, sample_size, distance, keyframe);
1658         distance++;
1659         assert(sample_duration % sc->time_rate == 0);
1660         dts += sample_duration / sc->time_rate;
1661         offset += sample_size;
1662     }
1663     frag->moof_offset = offset;
1664     sc->sample_count = st->nb_index_entries;
1665     st->duration = dts;
1666     return 0;
1667 }
1668
1669 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1670 /* like the files created with Adobe Premiere 5.0, for samples see */
1671 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1672 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1673 {
1674     int err;
1675
1676     if (atom.size < 8)
1677         return 0; /* continue */
1678     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1679         url_fskip(pb, atom.size - 4);
1680         return 0;
1681     }
1682     atom.type = get_le32(pb);
1683     atom.offset += 8;
1684     atom.size -= 8;
1685     if (atom.type != MKTAG('m','d','a','t')) {
1686         url_fskip(pb, atom.size);
1687         return 0;
1688     }
1689     err = mov_read_mdat(c, pb, atom);
1690     return err;
1691 }
1692
1693 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1694 {
1695 #if CONFIG_ZLIB
1696     ByteIOContext ctx;
1697     uint8_t *cmov_data;
1698     uint8_t *moov_data; /* uncompressed data */
1699     long cmov_len, moov_len;
1700     int ret = -1;
1701
1702     get_be32(pb); /* dcom atom */
1703     if (get_le32(pb) != MKTAG('d','c','o','m'))
1704         return -1;
1705     if (get_le32(pb) != MKTAG('z','l','i','b')) {
1706         av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1707         return -1;
1708     }
1709     get_be32(pb); /* cmvd atom */
1710     if (get_le32(pb) != MKTAG('c','m','v','d'))
1711         return -1;
1712     moov_len = get_be32(pb); /* uncompressed size */
1713     cmov_len = atom.size - 6 * 4;
1714
1715     cmov_data = av_malloc(cmov_len);
1716     if (!cmov_data)
1717         return -1;
1718     moov_data = av_malloc(moov_len);
1719     if (!moov_data) {
1720         av_free(cmov_data);
1721         return -1;
1722     }
1723     get_buffer(pb, cmov_data, cmov_len);
1724     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1725         goto free_and_return;
1726     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1727         goto free_and_return;
1728     atom.type = MKTAG('m','o','o','v');
1729     atom.offset = 0;
1730     atom.size = moov_len;
1731 #ifdef DEBUG
1732 //    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1733 #endif
1734     ret = mov_read_default(c, &ctx, atom);
1735 free_and_return:
1736     av_free(moov_data);
1737     av_free(cmov_data);
1738     return ret;
1739 #else
1740     av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1741     return -1;
1742 #endif
1743 }
1744
1745 /* edit list atom */
1746 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1747 {
1748     MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1749     int i, edit_count;
1750
1751     get_byte(pb); /* version */
1752     get_be24(pb); /* flags */
1753     edit_count= sc->edit_count = get_be32(pb);     /* entries */
1754
1755     for(i=0; i<edit_count; i++){
1756         int time;
1757         get_be32(pb); /* Track duration */
1758         time = get_be32(pb); /* Media time */
1759         get_be32(pb); /* Media rate */
1760         if (time != 0)
1761             av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1762                    "a/v desync might occur, patch welcome\n");
1763     }
1764     dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1765     return 0;
1766 }
1767
1768 static const MOVParseTableEntry mov_default_parse_table[] = {
1769 { MKTAG('a','v','s','s'), mov_read_extradata },
1770 { MKTAG('c','o','6','4'), mov_read_stco },
1771 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1772 { MKTAG('d','i','n','f'), mov_read_default },
1773 { MKTAG('d','r','e','f'), mov_read_dref },
1774 { MKTAG('e','d','t','s'), mov_read_default },
1775 { MKTAG('e','l','s','t'), mov_read_elst },
1776 { MKTAG('e','n','d','a'), mov_read_enda },
1777 { MKTAG('f','i','e','l'), mov_read_extradata },
1778 { MKTAG('f','t','y','p'), mov_read_ftyp },
1779 { MKTAG('g','l','b','l'), mov_read_glbl },
1780 { MKTAG('h','d','l','r'), mov_read_hdlr },
1781 { MKTAG('i','l','s','t'), mov_read_ilst },
1782 { MKTAG('j','p','2','h'), mov_read_extradata },
1783 { MKTAG('m','d','a','t'), mov_read_mdat },
1784 { MKTAG('m','d','h','d'), mov_read_mdhd },
1785 { MKTAG('m','d','i','a'), mov_read_default },
1786 { MKTAG('m','e','t','a'), mov_read_meta },
1787 { MKTAG('m','i','n','f'), mov_read_default },
1788 { MKTAG('m','o','o','f'), mov_read_moof },
1789 { MKTAG('m','o','o','v'), mov_read_moov },
1790 { MKTAG('m','v','e','x'), mov_read_default },
1791 { MKTAG('m','v','h','d'), mov_read_mvhd },
1792 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1793 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1794 { MKTAG('a','v','c','C'), mov_read_glbl },
1795 { MKTAG('p','a','s','p'), mov_read_pasp },
1796 { MKTAG('s','t','b','l'), mov_read_default },
1797 { MKTAG('s','t','c','o'), mov_read_stco },
1798 { MKTAG('s','t','s','c'), mov_read_stsc },
1799 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1800 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1801 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1802 { MKTAG('s','t','t','s'), mov_read_stts },
1803 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1804 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1805 { MKTAG('t','r','a','k'), mov_read_trak },
1806 { MKTAG('t','r','a','f'), mov_read_default },
1807 { MKTAG('t','r','e','x'), mov_read_trex },
1808 { MKTAG('t','r','k','n'), mov_read_trkn },
1809 { MKTAG('t','r','u','n'), mov_read_trun },
1810 { MKTAG('u','d','t','a'), mov_read_default },
1811 { MKTAG('w','a','v','e'), mov_read_wave },
1812 { MKTAG('e','s','d','s'), mov_read_esds },
1813 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1814 { MKTAG('c','m','o','v'), mov_read_cmov },
1815 { MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
1816 { MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
1817 { MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
1818 { MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1819 { MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1820 { MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
1821 { MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
1822 { MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
1823 { 0, NULL }
1824 };
1825
1826 static int mov_probe(AVProbeData *p)
1827 {
1828     unsigned int offset;
1829     uint32_t tag;
1830     int score = 0;
1831
1832     /* check file header */
1833     offset = 0;
1834     for(;;) {
1835         /* ignore invalid offset */
1836         if ((offset + 8) > (unsigned int)p->buf_size)
1837             return score;
1838         tag = AV_RL32(p->buf + offset + 4);
1839         switch(tag) {
1840         /* check for obvious tags */
1841         case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1842         case MKTAG('m','o','o','v'):
1843         case MKTAG('m','d','a','t'):
1844         case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1845         case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1846         case MKTAG('f','t','y','p'):
1847             return AVPROBE_SCORE_MAX;
1848         /* those are more common words, so rate then a bit less */
1849         case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1850         case MKTAG('w','i','d','e'):
1851         case MKTAG('f','r','e','e'):
1852         case MKTAG('j','u','n','k'):
1853         case MKTAG('p','i','c','t'):
1854             return AVPROBE_SCORE_MAX - 5;
1855         case MKTAG(0x82,0x82,0x7f,0x7d):
1856         case MKTAG('s','k','i','p'):
1857         case MKTAG('u','u','i','d'):
1858         case MKTAG('p','r','f','l'):
1859             offset = AV_RB32(p->buf+offset) + offset;
1860             /* if we only find those cause probedata is too small at least rate them */
1861             score = AVPROBE_SCORE_MAX - 50;
1862             break;
1863         default:
1864             /* unrecognized tag */
1865             return score;
1866         }
1867     }
1868     return score;
1869 }
1870
1871 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1872 {
1873     MOVContext *mov = s->priv_data;
1874     ByteIOContext *pb = s->pb;
1875     int err;
1876     MOVAtom atom = { 0, 0, 0 };
1877
1878     mov->fc = s;
1879     /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1880     if(!url_is_streamed(pb))
1881         atom.size = url_fsize(pb);
1882     else
1883         atom.size = INT64_MAX;
1884
1885     /* check MOV header */
1886     if ((err = mov_read_default(mov, pb, atom)) < 0) {
1887         av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1888         return err;
1889     }
1890     if (!mov->found_moov) {
1891         av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1892         return -1;
1893     }
1894     dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1895
1896     return 0;
1897 }
1898
1899 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1900 {
1901     MOVContext *mov = s->priv_data;
1902     MOVStreamContext *sc = 0;
1903     AVIndexEntry *sample = 0;
1904     int64_t best_dts = INT64_MAX;
1905     int i;
1906  retry:
1907     for (i = 0; i < s->nb_streams; i++) {
1908         AVStream *st = s->streams[i];
1909         MOVStreamContext *msc = st->priv_data;
1910         if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1911             AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1912             int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1913                                      AV_TIME_BASE, msc->time_scale);
1914             dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1915             if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1916                 (!url_is_streamed(s->pb) &&
1917                  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1918                  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1919                   (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1920                 sample = current_sample;
1921                 best_dts = dts;
1922                 sc = msc;
1923             }
1924         }
1925     }
1926     if (!sample) {
1927         mov->found_mdat = 0;
1928         if (!url_is_streamed(s->pb) ||
1929             mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1930             url_feof(s->pb))
1931             return -1;
1932         dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1933         goto retry;
1934     }
1935     /* must be done just before reading, to avoid infinite loop on sample */
1936     sc->current_sample++;
1937     if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1938         av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1939                sc->ffindex, sample->pos);
1940         return -1;
1941     }
1942     av_get_packet(sc->pb, pkt, sample->size);
1943 #if CONFIG_DV_DEMUXER
1944     if (mov->dv_demux && sc->dv_audio_container) {
1945         dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1946         av_free(pkt->data);
1947         pkt->size = 0;
1948         if (dv_get_packet(mov->dv_demux, pkt) < 0)
1949             return -1;
1950     }
1951 #endif
1952     pkt->stream_index = sc->ffindex;
1953     pkt->dts = sample->timestamp;
1954     if (sc->ctts_data) {
1955         assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1956         pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1957         /* update ctts context */
1958         sc->sample_to_ctime_sample++;
1959         if (sc->sample_to_ctime_index < sc->ctts_count &&
1960             sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1961             sc->sample_to_ctime_index++;
1962             sc->sample_to_ctime_sample = 0;
1963         }
1964         if (sc->wrong_dts)
1965             pkt->dts = AV_NOPTS_VALUE;
1966     } else {
1967         AVStream *st = s->streams[sc->ffindex];
1968         int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1969             st->index_entries[sc->current_sample].timestamp : st->duration;
1970         pkt->duration = next_dts - pkt->dts;
1971         pkt->pts = pkt->dts;
1972     }
1973     pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1974     pkt->pos = sample->pos;
1975     dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1976             pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1977     return 0;
1978 }
1979
1980 static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1981 {
1982     MOVStreamContext *sc = st->priv_data;
1983     int sample, time_sample;
1984     int i;
1985
1986     sample = av_index_search_timestamp(st, timestamp, flags);
1987     dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1988     if (sample < 0) /* not sure what to do */
1989         return -1;
1990     sc->current_sample = sample;
1991     dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1992     /* adjust ctts index */
1993     if (sc->ctts_data) {
1994         time_sample = 0;
1995         for (i = 0; i < sc->ctts_count; i++) {
1996             int next = time_sample + sc->ctts_data[i].count;
1997             if (next > sc->current_sample) {
1998                 sc->sample_to_ctime_index = i;
1999                 sc->sample_to_ctime_sample = sc->current_sample - time_sample;
2000                 break;
2001             }
2002             time_sample = next;
2003         }
2004     }
2005     return sample;
2006 }
2007
2008 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2009 {
2010     AVStream *st;
2011     int64_t seek_timestamp, timestamp;
2012     int sample;
2013     int i;
2014
2015     if (stream_index >= s->nb_streams)
2016         return -1;
2017
2018     st = s->streams[stream_index];
2019     sample = mov_seek_stream(st, sample_time, flags);
2020     if (sample < 0)
2021         return -1;
2022
2023     /* adjust seek timestamp to found sample timestamp */
2024     seek_timestamp = st->index_entries[sample].timestamp;
2025
2026     for (i = 0; i < s->nb_streams; i++) {
2027         st = s->streams[i];
2028         if (stream_index == i || st->discard == AVDISCARD_ALL)
2029             continue;
2030
2031         timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2032         mov_seek_stream(st, timestamp, flags);
2033     }
2034     return 0;
2035 }
2036
2037 static int mov_read_close(AVFormatContext *s)
2038 {
2039     int i, j;
2040     MOVContext *mov = s->priv_data;
2041     for(i=0; i<s->nb_streams; i++) {
2042         MOVStreamContext *sc = s->streams[i]->priv_data;
2043         av_freep(&sc->ctts_data);
2044         for (j=0; j<sc->drefs_count; j++)
2045             av_freep(&sc->drefs[j].path);
2046         av_freep(&sc->drefs);
2047         if (sc->pb && sc->pb != s->pb)
2048             url_fclose(sc->pb);
2049     }
2050     if(mov->dv_demux){
2051         for(i=0; i<mov->dv_fctx->nb_streams; i++){
2052             av_freep(&mov->dv_fctx->streams[i]->codec);
2053             av_freep(&mov->dv_fctx->streams[i]);
2054         }
2055         av_freep(&mov->dv_fctx);
2056         av_freep(&mov->dv_demux);
2057     }
2058     av_freep(&mov->trex_data);
2059     return 0;
2060 }
2061
2062 AVInputFormat mov_demuxer = {
2063     "mov,mp4,m4a,3gp,3g2,mj2",
2064     NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2065     sizeof(MOVContext),
2066     mov_probe,
2067     mov_read_header,
2068     mov_read_packet,
2069     mov_read_close,
2070     mov_read_seek,
2071 };