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FFmpeg/libavformat/mov.c

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  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 "libavutil/avstring.h"

  28. #include "avformat.h"

  29. #include "riff.h"

  30. #include "isom.h"

  31. #include "dv.h"

  32. #include "libavcodec/mpeg4audio.h"

  33. #include "libavcodec/mpegaudiodata.h"

  34. 

  35. #if CONFIG_ZLIB

  36. #include <zlib.h>

  37. #endif

  38. 

  39. /*

  40.  * First version by Francois Revol revol@free.fr

  41.  * Seek function by Gael Chardon gael.dev@4now.net

  42.  *

  43.  * Features and limitations:

  44.  * - reads most of the QT files I have (at least the structure),

  45.  *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html

  46.  * - the code is quite ugly... maybe I won't do it recursive next time :-)

  47.  *

  48.  * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/

  49.  * when coding this :) (it's a writer anyway)

  50.  *

  51.  * Reference documents:

  52.  * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt

  53.  * Apple:

  54.  *  http://developer.apple.com/documentation/QuickTime/QTFF/

  55.  *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf

  56.  * QuickTime is a trademark of Apple (AFAIK :))

  57.  */

  58. 

  59. #include "qtpalette.h"

  60. 

  61. 

  62. #undef NDEBUG

  63. #include <assert.h>

  64. 

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

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

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

  68.  */

  69. 

  70. typedef struct {

  71.     int first;

  72.     int count;

  73.     int id;

  74. } MOVStsc;

  75. 

  76. typedef struct {

  77.     uint32_t type;

  78.     char *path;

  79. } MOVDref;

  80. 

  81. typedef struct {

  82.     uint32_t type;

  83.     int64_t offset;

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

  85. } MOVAtom;

  86. 

  87. struct MOVParseTableEntry;

  88. 

  89. typedef struct {

  90.     unsigned track_id;

  91.     uint64_t base_data_offset;

  92.     uint64_t moof_offset;

  93.     unsigned stsd_id;

  94.     unsigned duration;

  95.     unsigned size;

  96.     unsigned flags;

  97. } MOVFragment;

  98. 

  99. typedef struct {

  100.     unsigned track_id;

  101.     unsigned stsd_id;

  102.     unsigned duration;

  103.     unsigned size;

  104.     unsigned flags;

  105. } MOVTrackExt;

  106. 

  107. typedef struct MOVStreamContext {

  108.     ByteIOContext *pb;

  109.     int ffindex; /* the ffmpeg stream id */

  110.     int next_chunk;

  111.     unsigned int chunk_count;

  112.     int64_t *chunk_offsets;

  113.     unsigned int stts_count;

  114.     MOVStts *stts_data;

  115.     unsigned int ctts_count;

  116.     MOVStts *ctts_data;

  117.     unsigned int stsc_count;

  118.     MOVStsc *stsc_data;

  119.     int ctts_index;

  120.     int ctts_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 time_offset; ///< time offset of the first edit list entry

  129.     int current_sample;

  130.     unsigned int bytes_per_frame;

  131.     unsigned int samples_per_frame;

  132.     int dv_audio_container;

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

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

  135.     unsigned drefs_count;

  136.     MOVDref *drefs;

  137.     int dref_id;

  138.     int wrong_dts; ///< dts are wrong due to negative ctts

  139.     int width;  ///< tkhd width

  140.     int height; ///< tkhd height

  141. } MOVStreamContext;

  142. 

  143. typedef struct MOVContext {

  144.     AVFormatContext *fc;

  145.     int time_scale;

  146.     int64_t duration; /* duration of the longest track */

  147.     int found_moov; /* when both 'moov' and 'mdat' sections has been found */

  148.     int found_mdat; /* we suppose we have enough data to read the file */

  149.     AVPaletteControl palette_control;

  150.     DVDemuxContext *dv_demux;

  151.     AVFormatContext *dv_fctx;

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

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

  154.     MOVTrackExt *trex_data;

  155.     unsigned trex_count;

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

  157. } MOVContext;

  158. 

  159. 

  160. /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */

  161. 

  162. /* those functions parse an atom */

  163. /* return code:

  164.   0: continue to parse next atom

  165.  <0: error occurred, exit

  166. */

  167. /* links atom IDs to parse functions */

  168. typedef struct MOVParseTableEntry {

  169.     uint32_t type;

  170.     int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);

  171. } MOVParseTableEntry;

  172. 

  173. static const MOVParseTableEntry mov_default_parse_table[];

  174. 

  175. static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  176. {

  177.     int64_t total_size = 0;

  178.     MOVAtom a;

  179.     int i;

  180.     int err = 0;

  181. 

  182.     a.offset = atom.offset;

  183. 

  184.     if (atom.size < 0)

  185.         atom.size = INT64_MAX;

  186.     while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {

  187.         a.size = atom.size;

  188.         a.type=0;

  189.         if(atom.size >= 8) {

  190.             a.size = get_be32(pb);

  191.             a.type = get_le32(pb);

  192.         }

  193.         total_size += 8;

  194.         a.offset += 8;

  195.         dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",

  196.                 a.type, (char*)&a.type, a.size, atom.size, total_size);

  197.         if (a.size == 1) { /* 64 bit extended size */

  198.             a.size = get_be64(pb) - 8;

  199.             a.offset += 8;

  200.             total_size += 8;

  201.         }

  202.         if (a.size == 0) {

  203.             a.size = atom.size - total_size;

  204.             if (a.size <= 8)

  205.                 break;

  206.         }

  207.         a.size -= 8;

  208.         if(a.size < 0)

  209.             break;

  210.         a.size = FFMIN(a.size, atom.size - total_size);

  211. 

  212.         for (i = 0; mov_default_parse_table[i].type != 0

  213.              && mov_default_parse_table[i].type != a.type; i++)

  214.             /* empty */;

  215. 

  216.         if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */

  217.             url_fskip(pb, a.size);

  218.         } else {

  219.             int64_t start_pos = url_ftell(pb);

  220.             int64_t left;

  221.             err = mov_default_parse_table[i].parse(c, pb, a);

  222.             if (url_is_streamed(pb) && c->found_moov && c->found_mdat)

  223.                 break;

  224.             left = a.size - url_ftell(pb) + start_pos;

  225.             if (left > 0) /* skip garbage at atom end */

  226.                 url_fskip(pb, left);

  227.         }

  228. 

  229.         a.offset += a.size;

  230.         total_size += a.size;

  231.     }

  232. 

  233.     if (!err && total_size < atom.size && atom.size < 0x7ffff)

  234.         url_fskip(pb, atom.size - total_size);

  235. 

  236.     return err;

  237. }

  238. 

  239. static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  240. {

  241.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  242.     MOVStreamContext *sc = st->priv_data;

  243.     int entries, i, j;

  244. 

  245.     get_be32(pb); // version + flags

  246.     entries = get_be32(pb);

  247.     if (entries >= UINT_MAX / sizeof(*sc->drefs))

  248.         return -1;

  249.     sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));

  250.     if (!sc->drefs)

  251.         return AVERROR(ENOMEM);

  252.     sc->drefs_count = entries;

  253. 

  254.     for (i = 0; i < sc->drefs_count; i++) {

  255.         MOVDref *dref = &sc->drefs[i];

  256.         uint32_t size = get_be32(pb);

  257.         int64_t next = url_ftell(pb) + size - 4;

  258. 

  259.         dref->type = get_le32(pb);

  260.         get_be32(pb); // version + flags

  261.         dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);

  262. 

  263.         if (dref->type == MKTAG('a','l','i','s') && size > 150) {

  264.             /* macintosh alias record */

  265.             uint16_t volume_len, len;

  266.             char volume[28];

  267.             int16_t type;

  268. 

  269.             url_fskip(pb, 10);

  270. 

  271.             volume_len = get_byte(pb);

  272.             volume_len = FFMIN(volume_len, 27);

  273.             get_buffer(pb, volume, 27);

  274.             volume[volume_len] = 0;

  275.             av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);

  276. 

  277.             url_fskip(pb, 112);

  278. 

  279.             for (type = 0; type != -1 && url_ftell(pb) < next; ) {

  280.                 type = get_be16(pb);

  281.                 len = get_be16(pb);

  282.                 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);

  283.                 if (len&1)

  284.                     len += 1;

  285.                 if (type == 2) { // absolute path

  286.                     av_free(dref->path);

  287.                     dref->path = av_mallocz(len+1);

  288.                     if (!dref->path)

  289.                         return AVERROR(ENOMEM);

  290.                     get_buffer(pb, dref->path, len);

  291.                     if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {

  292.                         len -= volume_len;

  293.                         memmove(dref->path, dref->path+volume_len, len);

  294.                         dref->path[len] = 0;

  295.                     }

  296.                     for (j = 0; j < len; j++)

  297.                         if (dref->path[j] == ':')

  298.                             dref->path[j] = '/';

  299.                     av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);

  300.                 } else

  301.                     url_fskip(pb, len);

  302.             }

  303.         }

  304.         url_fseek(pb, next, SEEK_SET);

  305.     }

  306.     return 0;

  307. }

  308. 

  309. static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  310. {

  311.     AVStream *st;

  312.     uint32_t type;

  313.     uint32_t ctype;

  314. 

  315.     if (c->fc->nb_streams < 1) // meta before first trak

  316.         return 0;

  317. 

  318.     st = c->fc->streams[c->fc->nb_streams-1];

  319. 

  320.     get_byte(pb); /* version */

  321.     get_be24(pb); /* flags */

  322. 

  323.     /* component type */

  324.     ctype = get_le32(pb);

  325.     type = get_le32(pb); /* component subtype */

  326. 

  327.     dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],

  328.             ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);

  329.     dprintf(c->fc, "stype= %c%c%c%c\n",

  330.             *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);

  331.     if(!ctype)

  332.         c->isom = 1;

  333.     if     (type == MKTAG('v','i','d','e'))

  334.         st->codec->codec_type = CODEC_TYPE_VIDEO;

  335.     else if(type == MKTAG('s','o','u','n'))

  336.         st->codec->codec_type = CODEC_TYPE_AUDIO;

  337.     else if(type == MKTAG('m','1','a',' '))

  338.         st->codec->codec_id = CODEC_ID_MP2;

  339.     else if(type == MKTAG('s','u','b','p')) {

  340.         st->codec->codec_type = CODEC_TYPE_SUBTITLE;

  341.     }

  342.     get_be32(pb); /* component  manufacture */

  343.     get_be32(pb); /* component flags */

  344.     get_be32(pb); /* component flags mask */

  345. 

  346.     if(atom.size <= 24)

  347.         return 0; /* nothing left to read */

  348. 

  349.     url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));

  350.     return 0;

  351. }

  352. 

  353. static int mp4_read_descr_len(ByteIOContext *pb)

  354. {

  355.     int len = 0;

  356.     int count = 4;

  357.     while (count--) {

  358.         int c = get_byte(pb);

  359.         len = (len << 7) | (c & 0x7f);

  360.         if (!(c & 0x80))

  361.             break;

  362.     }

  363.     return len;

  364. }

  365. 

  366. static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)

  367. {

  368.     int len;

  369.     *tag = get_byte(pb);

  370.     len = mp4_read_descr_len(pb);

  371.     dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);

  372.     return len;

  373. }

  374. 

  375. #define MP4ESDescrTag                   0x03

  376. #define MP4DecConfigDescrTag            0x04

  377. #define MP4DecSpecificDescrTag          0x05

  378. 

  379. static const AVCodecTag mp4_audio_types[] = {

  380.     { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */

  381.     { CODEC_ID_MP3ON4, 32 }, /* layer 1 */

  382.     { CODEC_ID_MP3ON4, 33 }, /* layer 2 */

  383.     { CODEC_ID_MP3ON4, 34 }, /* layer 3 */

  384.     { CODEC_ID_NONE,    0 },

  385. };

  386. 

  387. static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  388. {

  389.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  390.     int tag, len;

  391. 

  392.     get_be32(pb); /* version + flags */

  393.     len = mp4_read_descr(c, pb, &tag);

  394.     if (tag == MP4ESDescrTag) {

  395.         get_be16(pb); /* ID */

  396.         get_byte(pb); /* priority */

  397.     } else

  398.         get_be16(pb); /* ID */

  399. 

  400.     len = mp4_read_descr(c, pb, &tag);

  401.     if (tag == MP4DecConfigDescrTag) {

  402.         int object_type_id = get_byte(pb);

  403.         get_byte(pb); /* stream type */

  404.         get_be24(pb); /* buffer size db */

  405.         get_be32(pb); /* max bitrate */

  406.         get_be32(pb); /* avg bitrate */

  407. 

  408.         st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);

  409.         dprintf(c->fc, "esds object type id %d\n", object_type_id);

  410.         len = mp4_read_descr(c, pb, &tag);

  411.         if (tag == MP4DecSpecificDescrTag) {

  412.             dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);

  413.             if((uint64_t)len > (1<<30))

  414.                 return -1;

  415.             st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);

  416.             if (!st->codec->extradata)

  417.                 return AVERROR(ENOMEM);

  418.             get_buffer(pb, st->codec->extradata, len);

  419.             st->codec->extradata_size = len;

  420.             if (st->codec->codec_id == CODEC_ID_AAC) {

  421.                 MPEG4AudioConfig cfg;

  422.                 ff_mpeg4audio_get_config(&cfg, st->codec->extradata,

  423.                                          st->codec->extradata_size);

  424.                 if (cfg.chan_config > 7)

  425.                     return -1;

  426.                 st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];

  427.                 if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4

  428.                     st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];

  429.                 else

  430.                     st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?

  431.                 dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "

  432.                         "sample rate %d ext sample rate %d\n", st->codec->channels,

  433.                         cfg.object_type, cfg.ext_object_type,

  434.                         cfg.sample_rate, cfg.ext_sample_rate);

  435.                 if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,

  436.                                                          cfg.object_type)))

  437.                     st->codec->codec_id = CODEC_ID_AAC;

  438.             }

  439.         }

  440.     }

  441.     return 0;

  442. }

  443. 

  444. static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  445. {

  446.     const int num = get_be32(pb);

  447.     const int den = get_be32(pb);

  448.     AVStream * const st = c->fc->streams[c->fc->nb_streams-1];

  449.     if (den != 0) {

  450.         if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default

  451.             (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))

  452.             av_log(c->fc, AV_LOG_WARNING,

  453.                    "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",

  454.                    st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);

  455.         st->sample_aspect_ratio.num = num;

  456.         st->sample_aspect_ratio.den = den;

  457.     }

  458.     return 0;

  459. }

  460. 

  461. /* this atom contains actual media data */

  462. static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  463. {

  464.     if(atom.size == 0) /* wrong one (MP4) */

  465.         return 0;

  466.     c->found_mdat=1;

  467.     return 0; /* now go for moov */

  468. }

  469. 

  470. static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  471. {

  472.     uint32_t type = get_le32(pb);

  473. 

  474.     if (type != MKTAG('q','t',' ',' '))

  475.         c->isom = 1;

  476.     av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);

  477.     get_be32(pb); /* minor version */

  478.     url_fskip(pb, atom.size - 8);

  479.     return 0;

  480. }

  481. 

  482. /* this atom should contain all header atoms */

  483. static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  484. {

  485.     if (mov_read_default(c, pb, atom) < 0)

  486.         return -1;

  487.     /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */

  488.     /* so we don't parse the whole file if over a network */

  489.     c->found_moov=1;

  490.     return 0; /* now go for mdat */

  491. }

  492. 

  493. static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  494. {

  495.     c->fragment.moof_offset = url_ftell(pb) - 8;

  496.     dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);

  497.     return mov_read_default(c, pb, atom);

  498. }

  499. 

  500. static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  501. {

  502.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  503.     MOVStreamContext *sc = st->priv_data;

  504.     int version = get_byte(pb);

  505.     char language[4] = {0};

  506.     unsigned lang;

  507. 

  508.     if (version > 1)

  509.         return -1; /* unsupported */

  510. 

  511.     get_be24(pb); /* flags */

  512.     if (version == 1) {

  513.         get_be64(pb);

  514.         get_be64(pb);

  515.     } else {

  516.         get_be32(pb); /* creation time */

  517.         get_be32(pb); /* modification time */

  518.     }

  519. 

  520.     sc->time_scale = get_be32(pb);

  521.     st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */

  522. 

  523.     lang = get_be16(pb); /* language */

  524.     if (ff_mov_lang_to_iso639(lang, language))

  525.         av_metadata_set(&st->metadata, "language", language);

  526.     get_be16(pb); /* quality */

  527. 

  528.     return 0;

  529. }

  530. 

  531. static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  532. {

  533.     int version = get_byte(pb); /* version */

  534.     get_be24(pb); /* flags */

  535. 

  536.     if (version == 1) {

  537.         get_be64(pb);

  538.         get_be64(pb);

  539.     } else {

  540.         get_be32(pb); /* creation time */

  541.         get_be32(pb); /* modification time */

  542.     }

  543.     c->time_scale = get_be32(pb); /* time scale */

  544. 

  545.     dprintf(c->fc, "time scale = %i\n", c->time_scale);

  546. 

  547.     c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */

  548.     get_be32(pb); /* preferred scale */

  549. 

  550.     get_be16(pb); /* preferred volume */

  551. 

  552.     url_fskip(pb, 10); /* reserved */

  553. 

  554.     url_fskip(pb, 36); /* display matrix */

  555. 

  556.     get_be32(pb); /* preview time */

  557.     get_be32(pb); /* preview duration */

  558.     get_be32(pb); /* poster time */

  559.     get_be32(pb); /* selection time */

  560.     get_be32(pb); /* selection duration */

  561.     get_be32(pb); /* current time */

  562.     get_be32(pb); /* next track ID */

  563. 

  564.     return 0;

  565. }

  566. 

  567. static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  568. {

  569.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  570. 

  571.     if((uint64_t)atom.size > (1<<30))

  572.         return -1;

  573. 

  574.     // currently SVQ3 decoder expect full STSD header - so let's fake it

  575.     // this should be fixed and just SMI header should be passed

  576.     av_free(st->codec->extradata);

  577.     st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);

  578.     if (!st->codec->extradata)

  579.         return AVERROR(ENOMEM);

  580.     st->codec->extradata_size = 0x5a + atom.size;

  581.     memcpy(st->codec->extradata, "SVQ3", 4); // fake

  582.     get_buffer(pb, st->codec->extradata + 0x5a, atom.size);

  583.     dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);

  584.     return 0;

  585. }

  586. 

  587. static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  588. {

  589.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  590.     int little_endian = get_be16(pb);

  591. 

  592.     dprintf(c->fc, "enda %d\n", little_endian);

  593.     if (little_endian == 1) {

  594.         switch (st->codec->codec_id) {

  595.         case CODEC_ID_PCM_S24BE:

  596.             st->codec->codec_id = CODEC_ID_PCM_S24LE;

  597.             break;

  598.         case CODEC_ID_PCM_S32BE:

  599.             st->codec->codec_id = CODEC_ID_PCM_S32LE;

  600.             break;

  601.         case CODEC_ID_PCM_F32BE:

  602.             st->codec->codec_id = CODEC_ID_PCM_F32LE;

  603.             break;

  604.         case CODEC_ID_PCM_F64BE:

  605.             st->codec->codec_id = CODEC_ID_PCM_F64LE;

  606.             break;

  607.         default:

  608.             break;

  609.         }

  610.     }

  611.     return 0;

  612. }

  613. 

  614. /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */

  615. static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  616. {

  617.     AVStream *st;

  618.     uint64_t size;

  619.     uint8_t *buf;

  620. 

  621.     if (c->fc->nb_streams < 1) // will happen with jp2 files

  622.         return 0;

  623.     st= c->fc->streams[c->fc->nb_streams-1];

  624.     size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;

  625.     if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)

  626.         return -1;

  627.     buf= av_realloc(st->codec->extradata, size);

  628.     if(!buf)

  629.         return -1;

  630.     st->codec->extradata= buf;

  631.     buf+= st->codec->extradata_size;

  632.     st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;

  633.     AV_WB32(       buf    , atom.size + 8);

  634.     AV_WL32(       buf + 4, atom.type);

  635.     get_buffer(pb, buf + 8, atom.size);

  636.     return 0;

  637. }

  638. 

  639. static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  640. {

  641.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  642. 

  643.     if((uint64_t)atom.size > (1<<30))

  644.         return -1;

  645. 

  646.     if (st->codec->codec_id == CODEC_ID_QDM2) {

  647.         // pass all frma atom to codec, needed at least for QDM2

  648.         av_free(st->codec->extradata);

  649.         st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);

  650.         if (!st->codec->extradata)

  651.             return AVERROR(ENOMEM);

  652.         st->codec->extradata_size = atom.size;

  653.         get_buffer(pb, st->codec->extradata, atom.size);

  654.     } else if (atom.size > 8) { /* to read frma, esds atoms */

  655.         if (mov_read_default(c, pb, atom) < 0)

  656.             return -1;

  657.     } else

  658.         url_fskip(pb, atom.size);

  659.     return 0;

  660. }

  661. 

  662. /**

  663.  * This function reads atom content and puts data in extradata without tag

  664.  * nor size unlike mov_read_extradata.

  665.  */

  666. static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  667. {

  668.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  669. 

  670.     if((uint64_t)atom.size > (1<<30))

  671.         return -1;

  672. 

  673.     av_free(st->codec->extradata);

  674.     st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);

  675.     if (!st->codec->extradata)

  676.         return AVERROR(ENOMEM);

  677.     st->codec->extradata_size = atom.size;

  678.     get_buffer(pb, st->codec->extradata, atom.size);

  679.     return 0;

  680. }

  681. 

  682. static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  683. {

  684.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  685.     MOVStreamContext *sc = st->priv_data;

  686.     unsigned int i, entries;

  687. 

  688.     get_byte(pb); /* version */

  689.     get_be24(pb); /* flags */

  690. 

  691.     entries = get_be32(pb);

  692. 

  693.     if(entries >= UINT_MAX/sizeof(int64_t))

  694.         return -1;

  695. 

  696.     sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));

  697.     if (!sc->chunk_offsets)

  698.         return AVERROR(ENOMEM);

  699.     sc->chunk_count = entries;

  700. 

  701.     if      (atom.type == MKTAG('s','t','c','o'))

  702.         for(i=0; i<entries; i++)

  703.             sc->chunk_offsets[i] = get_be32(pb);

  704.     else if (atom.type == MKTAG('c','o','6','4'))

  705.         for(i=0; i<entries; i++)

  706.             sc->chunk_offsets[i] = get_be64(pb);

  707.     else

  708.         return -1;

  709. 

  710.     return 0;

  711. }

  712. 

  713. /**

  714.  * Compute codec id for 'lpcm' tag.

  715.  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.

  716.  */

  717. static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)

  718. {

  719.     if (flags & 1) { // floating point

  720.         if (flags & 2) { // big endian

  721.             if      (bps == 32) return CODEC_ID_PCM_F32BE;

  722.             else if (bps == 64) return CODEC_ID_PCM_F64BE;

  723.         } else {

  724.             if      (bps == 32) return CODEC_ID_PCM_F32LE;

  725.             else if (bps == 64) return CODEC_ID_PCM_F64LE;

  726.         }

  727.     } else {

  728.         if (flags & 2) {

  729.             if      (bps == 8)

  730.                 // signed integer

  731.                 if (flags & 4)  return CODEC_ID_PCM_S8;

  732.                 else            return CODEC_ID_PCM_U8;

  733.             else if (bps == 16) return CODEC_ID_PCM_S16BE;

  734.             else if (bps == 24) return CODEC_ID_PCM_S24BE;

  735.             else if (bps == 32) return CODEC_ID_PCM_S32BE;

  736.         } else {

  737.             if      (bps == 8)

  738.                 if (flags & 4)  return CODEC_ID_PCM_S8;

  739.                 else            return CODEC_ID_PCM_U8;

  740.             else if (bps == 16) return CODEC_ID_PCM_S16LE;

  741.             else if (bps == 24) return CODEC_ID_PCM_S24LE;

  742.             else if (bps == 32) return CODEC_ID_PCM_S32LE;

  743.         }

  744.     }

  745.     return CODEC_ID_NONE;

  746. }

  747. 

  748. static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  749. {

  750.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  751.     MOVStreamContext *sc = st->priv_data;

  752.     int j, entries, pseudo_stream_id;

  753. 

  754.     get_byte(pb); /* version */

  755.     get_be24(pb); /* flags */

  756. 

  757.     entries = get_be32(pb);

  758. 

  759.     for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {

  760.         //Parsing Sample description table

  761.         enum CodecID id;

  762.         int dref_id;

  763.         MOVAtom a = { 0, 0, 0 };

  764.         int64_t start_pos = url_ftell(pb);

  765.         int size = get_be32(pb); /* size */

  766.         uint32_t format = get_le32(pb); /* data format */

  767. 

  768.         get_be32(pb); /* reserved */

  769.         get_be16(pb); /* reserved */

  770.         dref_id = get_be16(pb);

  771. 

  772.         if (st->codec->codec_tag &&

  773.             st->codec->codec_tag != format &&

  774.             (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id

  775.                                    : st->codec->codec_tag != MKTAG('j','p','e','g'))

  776.            ){

  777.             /* Multiple fourcc, we skip JPEG. This is not correct, we should

  778.              * export it as a separate AVStream but this needs a few changes

  779.              * in the MOV demuxer, patch welcome. */

  780.             av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");

  781.             url_fskip(pb, size - (url_ftell(pb) - start_pos));

  782.             continue;

  783.         }

  784.         sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;

  785.         sc->dref_id= dref_id;

  786. 

  787.         st->codec->codec_tag = format;

  788.         id = codec_get_id(codec_movaudio_tags, format);

  789.         if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))

  790.             id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);

  791. 

  792.         if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {

  793.             st->codec->codec_type = CODEC_TYPE_AUDIO;

  794.         } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */

  795.                    format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */

  796.             id = codec_get_id(codec_movvideo_tags, format);

  797.             if (id <= 0)

  798.                 id = codec_get_id(codec_bmp_tags, format);

  799.             if (id > 0)

  800.                 st->codec->codec_type = CODEC_TYPE_VIDEO;

  801.             else if(st->codec->codec_type == CODEC_TYPE_DATA){

  802.                 id = codec_get_id(ff_codec_movsubtitle_tags, format);

  803.                 if(id > 0)

  804.                     st->codec->codec_type = CODEC_TYPE_SUBTITLE;

  805.             }

  806.         }

  807. 

  808.         dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,

  809.                 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,

  810.                 (format >> 24) & 0xff, st->codec->codec_type);

  811. 

  812.         if(st->codec->codec_type==CODEC_TYPE_VIDEO) {

  813.             uint8_t codec_name[32];

  814.             unsigned int color_depth;

  815.             int color_greyscale;

  816. 

  817.             st->codec->codec_id = id;

  818.             get_be16(pb); /* version */

  819.             get_be16(pb); /* revision level */

  820.             get_be32(pb); /* vendor */

  821.             get_be32(pb); /* temporal quality */

  822.             get_be32(pb); /* spatial quality */

  823. 

  824.             st->codec->width = get_be16(pb); /* width */

  825.             st->codec->height = get_be16(pb); /* height */

  826. 

  827.             get_be32(pb); /* horiz resolution */

  828.             get_be32(pb); /* vert resolution */

  829.             get_be32(pb); /* data size, always 0 */

  830.             get_be16(pb); /* frames per samples */

  831. 

  832.             get_buffer(pb, codec_name, 32); /* codec name, pascal string */

  833.             if (codec_name[0] <= 31) {

  834.                 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);

  835.                 st->codec->codec_name[codec_name[0]] = 0;

  836.             }

  837. 

  838.             st->codec->bits_per_coded_sample = get_be16(pb); /* depth */

  839.             st->codec->color_table_id = get_be16(pb); /* colortable id */

  840.             dprintf(c->fc, "depth %d, ctab id %d\n",

  841.                    st->codec->bits_per_coded_sample, st->codec->color_table_id);

  842.             /* figure out the palette situation */

  843.             color_depth = st->codec->bits_per_coded_sample & 0x1F;

  844.             color_greyscale = st->codec->bits_per_coded_sample & 0x20;

  845. 

  846.             /* if the depth is 2, 4, or 8 bpp, file is palettized */

  847.             if ((color_depth == 2) || (color_depth == 4) ||

  848.                 (color_depth == 8)) {

  849.                 /* for palette traversal */

  850.                 unsigned int color_start, color_count, color_end;

  851.                 unsigned char r, g, b;

  852. 

  853.                 if (color_greyscale) {

  854.                     int color_index, color_dec;

  855.                     /* compute the greyscale palette */

  856.                     st->codec->bits_per_coded_sample = color_depth;

  857.                     color_count = 1 << color_depth;

  858.                     color_index = 255;

  859.                     color_dec = 256 / (color_count - 1);

  860.                     for (j = 0; j < color_count; j++) {

  861.                         r = g = b = color_index;

  862.                         c->palette_control.palette[j] =

  863.                             (r << 16) | (g << 8) | (b);

  864.                         color_index -= color_dec;

  865.                         if (color_index < 0)

  866.                             color_index = 0;

  867.                     }

  868.                 } else if (st->codec->color_table_id) {

  869.                     const uint8_t *color_table;

  870.                     /* if flag bit 3 is set, use the default palette */

  871.                     color_count = 1 << color_depth;

  872.                     if (color_depth == 2)

  873.                         color_table = ff_qt_default_palette_4;

  874.                     else if (color_depth == 4)

  875.                         color_table = ff_qt_default_palette_16;

  876.                     else

  877.                         color_table = ff_qt_default_palette_256;

  878. 

  879.                     for (j = 0; j < color_count; j++) {

  880.                         r = color_table[j * 4 + 0];

  881.                         g = color_table[j * 4 + 1];

  882.                         b = color_table[j * 4 + 2];

  883.                         c->palette_control.palette[j] =

  884.                             (r << 16) | (g << 8) | (b);

  885.                     }

  886.                 } else {

  887.                     /* load the palette from the file */

  888.                     color_start = get_be32(pb);

  889.                     color_count = get_be16(pb);

  890.                     color_end = get_be16(pb);

  891.                     if ((color_start <= 255) &&

  892.                         (color_end <= 255)) {

  893.                         for (j = color_start; j <= color_end; j++) {

  894.                             /* each R, G, or B component is 16 bits;

  895.                              * only use the top 8 bits; skip alpha bytes

  896.                              * up front */

  897.                             get_byte(pb);

  898.                             get_byte(pb);

  899.                             r = get_byte(pb);

  900.                             get_byte(pb);

  901.                             g = get_byte(pb);

  902.                             get_byte(pb);

  903.                             b = get_byte(pb);

  904.                             get_byte(pb);

  905.                             c->palette_control.palette[j] =

  906.                                 (r << 16) | (g << 8) | (b);

  907.                         }

  908.                     }

  909.                 }

  910.                 st->codec->palctrl = &c->palette_control;

  911.                 st->codec->palctrl->palette_changed = 1;

  912.             } else

  913.                 st->codec->palctrl = NULL;

  914.         } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {

  915.             int bits_per_sample, flags;

  916.             uint16_t version = get_be16(pb);

  917. 

  918.             st->codec->codec_id = id;

  919.             get_be16(pb); /* revision level */

  920.             get_be32(pb); /* vendor */

  921. 

  922.             st->codec->channels = get_be16(pb);             /* channel count */

  923.             dprintf(c->fc, "audio channels %d\n", st->codec->channels);

  924.             st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */

  925. 

  926.             sc->audio_cid = get_be16(pb);

  927.             get_be16(pb); /* packet size = 0 */

  928. 

  929.             st->codec->sample_rate = ((get_be32(pb) >> 16));

  930. 

  931.             //Read QT version 1 fields. In version 0 these do not exist.

  932.             dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);

  933.             if(!c->isom) {

  934.                 if(version==1) {

  935.                     sc->samples_per_frame = get_be32(pb);

  936.                     get_be32(pb); /* bytes per packet */

  937.                     sc->bytes_per_frame = get_be32(pb);

  938.                     get_be32(pb); /* bytes per sample */

  939.                 } else if(version==2) {

  940.                     get_be32(pb); /* sizeof struct only */

  941.                     st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */

  942.                     st->codec->channels = get_be32(pb);

  943.                     get_be32(pb); /* always 0x7F000000 */

  944.                     st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */

  945.                     flags = get_be32(pb); /* lcpm format specific flag */

  946.                     sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */

  947.                     sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */

  948.                     if (format == MKTAG('l','p','c','m'))

  949.                         st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);

  950.                 }

  951.             }

  952. 

  953.             switch (st->codec->codec_id) {

  954.             case CODEC_ID_PCM_S8:

  955.             case CODEC_ID_PCM_U8:

  956.                 if (st->codec->bits_per_coded_sample == 16)

  957.                     st->codec->codec_id = CODEC_ID_PCM_S16BE;

  958.                 break;

  959.             case CODEC_ID_PCM_S16LE:

  960.             case CODEC_ID_PCM_S16BE:

  961.                 if (st->codec->bits_per_coded_sample == 8)

  962.                     st->codec->codec_id = CODEC_ID_PCM_S8;

  963.                 else if (st->codec->bits_per_coded_sample == 24)

  964.                     st->codec->codec_id =

  965.                         st->codec->codec_id == CODEC_ID_PCM_S16BE ?

  966.                         CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;

  967.                 break;

  968.             /* set values for old format before stsd version 1 appeared */

  969.             case CODEC_ID_MACE3:

  970.                 sc->samples_per_frame = 6;

  971.                 sc->bytes_per_frame = 2*st->codec->channels;

  972.                 break;

  973.             case CODEC_ID_MACE6:

  974.                 sc->samples_per_frame = 6;

  975.                 sc->bytes_per_frame = 1*st->codec->channels;

  976.                 break;

  977.             case CODEC_ID_ADPCM_IMA_QT:

  978.                 sc->samples_per_frame = 64;

  979.                 sc->bytes_per_frame = 34*st->codec->channels;

  980.                 break;

  981.             case CODEC_ID_GSM:

  982.                 sc->samples_per_frame = 160;

  983.                 sc->bytes_per_frame = 33;

  984.                 break;

  985.             default:

  986.                 break;

  987.             }

  988. 

  989.             bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);

  990.             if (bits_per_sample) {

  991.                 st->codec->bits_per_coded_sample = bits_per_sample;

  992.                 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;

  993.             }

  994.         } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){

  995.             // ttxt stsd contains display flags, justification, background

  996.             // color, fonts, and default styles, so fake an atom to read it

  997.             MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };

  998.             mov_read_glbl(c, pb, fake_atom);

  999.             st->codec->codec_id= id;

  1000.             st->codec->width = sc->width;

  1001.             st->codec->height = sc->height;

  1002.         } else {

  1003.             /* other codec type, just skip (rtp, mp4s, tmcd ...) */

  1004.             url_fskip(pb, size - (url_ftell(pb) - start_pos));

  1005.         }

  1006.         /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */

  1007.         a.size = size - (url_ftell(pb) - start_pos);

  1008.         if (a.size > 8) {

  1009.             if (mov_read_default(c, pb, a) < 0)

  1010.                 return -1;

  1011.         } else if (a.size > 0)

  1012.             url_fskip(pb, a.size);

  1013.     }

  1014. 

  1015.     if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)

  1016.         st->codec->sample_rate= sc->time_scale;

  1017. 

  1018.     /* special codec parameters handling */

  1019.     switch (st->codec->codec_id) {

  1020. #if CONFIG_DV_DEMUXER

  1021.     case CODEC_ID_DVAUDIO:

  1022.         c->dv_fctx = avformat_alloc_context();

  1023.         c->dv_demux = dv_init_demux(c->dv_fctx);

  1024.         if (!c->dv_demux) {

  1025.             av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");

  1026.             return -1;

  1027.         }

  1028.         sc->dv_audio_container = 1;

  1029.         st->codec->codec_id = CODEC_ID_PCM_S16LE;

  1030.         break;

  1031. #endif

  1032.     /* no ifdef since parameters are always those */

  1033.     case CODEC_ID_QCELP:

  1034.         st->codec->frame_size= 160;

  1035.         st->codec->channels= 1; /* really needed */

  1036.         break;

  1037.     case CODEC_ID_AMR_NB:

  1038.     case CODEC_ID_AMR_WB:

  1039.         st->codec->frame_size= sc->samples_per_frame;

  1040.         st->codec->channels= 1; /* really needed */

  1041.         /* force sample rate for amr, stsd in 3gp does not store sample rate */

  1042.         if (st->codec->codec_id == CODEC_ID_AMR_NB)

  1043.             st->codec->sample_rate = 8000;

  1044.         else if (st->codec->codec_id == CODEC_ID_AMR_WB)

  1045.             st->codec->sample_rate = 16000;

  1046.         break;

  1047.     case CODEC_ID_MP2:

  1048.     case CODEC_ID_MP3:

  1049.         st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */

  1050.         st->need_parsing = AVSTREAM_PARSE_FULL;

  1051.         break;

  1052.     case CODEC_ID_GSM:

  1053.     case CODEC_ID_ADPCM_MS:

  1054.     case CODEC_ID_ADPCM_IMA_WAV:

  1055.         st->codec->block_align = sc->bytes_per_frame;

  1056.         break;

  1057.     case CODEC_ID_ALAC:

  1058.         if (st->codec->extradata_size == 36) {

  1059.             st->codec->frame_size = AV_RB32(st->codec->extradata+12);

  1060.             st->codec->channels   = AV_RB8 (st->codec->extradata+21);

  1061.         }

  1062.         break;

  1063.     default:

  1064.         break;

  1065.     }

  1066. 

  1067.     return 0;

  1068. }

  1069. 

  1070. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1071. {

  1072.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1073.     MOVStreamContext *sc = st->priv_data;

  1074.     unsigned int i, entries;

  1075. 

  1076.     get_byte(pb); /* version */

  1077.     get_be24(pb); /* flags */

  1078. 

  1079.     entries = get_be32(pb);

  1080. 

  1081.     dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1082. 

  1083.     if(entries >= UINT_MAX / sizeof(*sc->stsc_data))

  1084.         return -1;

  1085.     sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));

  1086.     if (!sc->stsc_data)

  1087.         return AVERROR(ENOMEM);

  1088.     sc->stsc_count = entries;

  1089. 

  1090.     for(i=0; i<entries; i++) {

  1091.         sc->stsc_data[i].first = get_be32(pb);

  1092.         sc->stsc_data[i].count = get_be32(pb);

  1093.         sc->stsc_data[i].id = get_be32(pb);

  1094.     }

  1095.     return 0;

  1096. }

  1097. 

  1098. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1099. {

  1100.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1101.     MOVStreamContext *sc = st->priv_data;

  1102.     unsigned int i, entries;

  1103. 

  1104.     get_byte(pb); /* version */

  1105.     get_be24(pb); /* flags */

  1106. 

  1107.     entries = get_be32(pb);

  1108. 

  1109.     dprintf(c->fc, "keyframe_count = %d\n", entries);

  1110. 

  1111.     if(entries >= UINT_MAX / sizeof(int))

  1112.         return -1;

  1113.     sc->keyframes = av_malloc(entries * sizeof(int));

  1114.     if (!sc->keyframes)

  1115.         return AVERROR(ENOMEM);

  1116.     sc->keyframe_count = entries;

  1117. 

  1118.     for(i=0; i<entries; i++) {

  1119.         sc->keyframes[i] = get_be32(pb);

  1120.         //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);

  1121.     }

  1122.     return 0;

  1123. }

  1124. 

  1125. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1126. {

  1127.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1128.     MOVStreamContext *sc = st->priv_data;

  1129.     unsigned int i, entries, sample_size;

  1130. 

  1131.     get_byte(pb); /* version */

  1132.     get_be24(pb); /* flags */

  1133. 

  1134.     sample_size = get_be32(pb);

  1135.     if (!sc->sample_size) /* do not overwrite value computed in stsd */

  1136.         sc->sample_size = sample_size;

  1137.     entries = get_be32(pb);

  1138. 

  1139.     dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);

  1140. 

  1141.     sc->sample_count = entries;

  1142.     if (sample_size)

  1143.         return 0;

  1144. 

  1145.     if(entries >= UINT_MAX / sizeof(int))

  1146.         return -1;

  1147.     sc->sample_sizes = av_malloc(entries * sizeof(int));

  1148.     if (!sc->sample_sizes)

  1149.         return AVERROR(ENOMEM);

  1150. 

  1151.     for(i=0; i<entries; i++)

  1152.         sc->sample_sizes[i] = get_be32(pb);

  1153.     return 0;

  1154. }

  1155. 

  1156. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1157. {

  1158.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1159.     MOVStreamContext *sc = st->priv_data;

  1160.     unsigned int i, entries;

  1161.     int64_t duration=0;

  1162.     int64_t total_sample_count=0;

  1163. 

  1164.     get_byte(pb); /* version */

  1165.     get_be24(pb); /* flags */

  1166.     entries = get_be32(pb);

  1167. 

  1168.     dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1169. 

  1170.     if(entries >= UINT_MAX / sizeof(*sc->stts_data))

  1171.         return -1;

  1172.     sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));

  1173.     if (!sc->stts_data)

  1174.         return AVERROR(ENOMEM);

  1175.     sc->stts_count = entries;

  1176. 

  1177.     for(i=0; i<entries; i++) {

  1178.         int sample_duration;

  1179.         int sample_count;

  1180. 

  1181.         sample_count=get_be32(pb);

  1182.         sample_duration = get_be32(pb);

  1183.         sc->stts_data[i].count= sample_count;

  1184.         sc->stts_data[i].duration= sample_duration;

  1185. 

  1186.         sc->time_rate= av_gcd(sc->time_rate, sample_duration);

  1187. 

  1188.         dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1189. 

  1190.         duration+=(int64_t)sample_duration*sample_count;

  1191.         total_sample_count+=sample_count;

  1192.     }

  1193. 

  1194.     st->nb_frames= total_sample_count;

  1195.     if(duration)

  1196.         st->duration= duration;

  1197.     return 0;

  1198. }

  1199. 

  1200. static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1201. {

  1202.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1203.     MOVStreamContext *sc = st->priv_data;

  1204.     unsigned int i, entries;

  1205. 

  1206.     get_byte(pb); /* version */

  1207.     get_be24(pb); /* flags */

  1208.     entries = get_be32(pb);

  1209. 

  1210.     dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);

  1211. 

  1212.     if(entries >= UINT_MAX / sizeof(*sc->ctts_data))

  1213.         return -1;

  1214.     sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));

  1215.     if (!sc->ctts_data)

  1216.         return AVERROR(ENOMEM);

  1217.     sc->ctts_count = entries;

  1218. 

  1219.     for(i=0; i<entries; i++) {

  1220.         int count    =get_be32(pb);

  1221.         int duration =get_be32(pb);

  1222. 

  1223.         if (duration < 0) {

  1224.             sc->wrong_dts = 1;

  1225.             st->codec->has_b_frames = 1;

  1226.         }

  1227.         sc->ctts_data[i].count   = count;

  1228.         sc->ctts_data[i].duration= duration;

  1229. 

  1230.         sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));

  1231.     }

  1232.     return 0;

  1233. }

  1234. 

  1235. static void mov_build_index(MOVContext *mov, AVStream *st)

  1236. {

  1237.     MOVStreamContext *sc = st->priv_data;

  1238.     int64_t current_offset;

  1239.     int64_t current_dts = 0;

  1240.     unsigned int stts_index = 0;

  1241.     unsigned int stsc_index = 0;

  1242.     unsigned int stss_index = 0;

  1243.     unsigned int i, j;

  1244. 

  1245.     /* adjust first dts according to edit list */

  1246.     if (sc->time_offset) {

  1247.         assert(sc->time_offset % sc->time_rate == 0);

  1248.         current_dts = - (sc->time_offset / sc->time_rate);

  1249.     }

  1250. 

  1251.     /* only use old uncompressed audio chunk demuxing when stts specifies it */

  1252.     if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&

  1253.           sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {

  1254.         unsigned int current_sample = 0;

  1255.         unsigned int stts_sample = 0;

  1256.         unsigned int keyframe, sample_size;

  1257.         unsigned int distance = 0;

  1258.         int key_off = sc->keyframes && sc->keyframes[0] == 1;

  1259. 

  1260.         st->nb_frames = sc->sample_count;

  1261.         for (i = 0; i < sc->chunk_count; i++) {

  1262.             current_offset = sc->chunk_offsets[i];

  1263.             if (stsc_index + 1 < sc->stsc_count &&

  1264.                 i + 1 == sc->stsc_data[stsc_index + 1].first)

  1265.                 stsc_index++;

  1266.             for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {

  1267.                 if (current_sample >= sc->sample_count) {

  1268.                     av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");

  1269.                     goto out;

  1270.                 }

  1271.                 keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];

  1272.                 if (keyframe) {

  1273.                     distance = 0;

  1274.                     if (stss_index + 1 < sc->keyframe_count)

  1275.                         stss_index++;

  1276.                 }

  1277.                 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];

  1278.                 if(sc->pseudo_stream_id == -1 ||

  1279.                    sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {

  1280.                     av_add_index_entry(st, current_offset, current_dts, sample_size, distance,

  1281.                                     keyframe ? AVINDEX_KEYFRAME : 0);

  1282.                     dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "

  1283.                             "size %d, distance %d, keyframe %d\n", st->index, current_sample,

  1284.                             current_offset, current_dts, sample_size, distance, keyframe);

  1285.                 }

  1286.                 current_offset += sample_size;

  1287.                 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);

  1288.                 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;

  1289.                 distance++;

  1290.                 stts_sample++;

  1291.                 current_sample++;

  1292.                 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {

  1293.                     stts_sample = 0;

  1294.                     stts_index++;

  1295.                 }

  1296.             }

  1297.         }

  1298.     } else { /* read whole chunk */

  1299.         unsigned int chunk_samples, chunk_size, chunk_duration;

  1300.         unsigned int frames = 1;

  1301.         for (i = 0; i < sc->chunk_count; i++) {

  1302.             current_offset = sc->chunk_offsets[i];

  1303.             if (stsc_index + 1 < sc->stsc_count &&

  1304.                 i + 1 == sc->stsc_data[stsc_index + 1].first)

  1305.                 stsc_index++;

  1306.             chunk_samples = sc->stsc_data[stsc_index].count;

  1307.             /* get chunk size, beware of alaw/ulaw/mace */

  1308.             if (sc->samples_per_frame > 0 &&

  1309.                 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {

  1310.                 if (sc->samples_per_frame < 160)

  1311.                     chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;

  1312.                 else {

  1313.                     chunk_size = sc->bytes_per_frame;

  1314.                     frames = chunk_samples / sc->samples_per_frame;

  1315.                     chunk_samples = sc->samples_per_frame;

  1316.                 }

  1317.             } else

  1318.                 chunk_size = chunk_samples * sc->sample_size;

  1319.             for (j = 0; j < frames; j++) {

  1320.                 av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);

  1321.                 /* get chunk duration */

  1322.                 chunk_duration = 0;

  1323.                 while (chunk_samples > 0) {

  1324.                     if (chunk_samples < sc->stts_data[stts_index].count) {

  1325.                         chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1326.                         sc->stts_data[stts_index].count -= chunk_samples;

  1327.                         break;

  1328.                     } else {

  1329.                         chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1330.                         chunk_samples -= sc->stts_data[stts_index].count;

  1331.                         if (stts_index + 1 < sc->stts_count)

  1332.                             stts_index++;

  1333.                     }

  1334.                 }

  1335.                 current_offset += sc->bytes_per_frame;

  1336.                 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "

  1337.                         "size %d, duration %d\n", st->index, i, current_offset, current_dts,

  1338.                         chunk_size, chunk_duration);

  1339.                 assert(chunk_duration % sc->time_rate == 0);

  1340.                 current_dts += chunk_duration / sc->time_rate;

  1341.             }

  1342.         }

  1343.     }

  1344.  out:

  1345.     /* adjust sample count to avindex entries */

  1346.     sc->sample_count = st->nb_index_entries;

  1347. }

  1348. 

  1349. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1350. {

  1351.     AVStream *st;

  1352.     MOVStreamContext *sc;

  1353.     int ret;

  1354. 

  1355.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1356.     if (!st) return AVERROR(ENOMEM);

  1357.     sc = av_mallocz(sizeof(MOVStreamContext));

  1358.     if (!sc) return AVERROR(ENOMEM);

  1359. 

  1360.     st->priv_data = sc;

  1361.     st->codec->codec_type = CODEC_TYPE_DATA;

  1362.     sc->ffindex = st->index;

  1363. 

  1364.     if ((ret = mov_read_default(c, pb, atom)) < 0)

  1365.         return ret;

  1366. 

  1367.     /* sanity checks */

  1368.     if(sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||

  1369.                            (!sc->sample_size && !sc->sample_count))){

  1370.         av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",

  1371.                st->index);

  1372.         sc->sample_count = 0; //ignore track

  1373.         return 0;

  1374.     }

  1375.     if(!sc->time_rate)

  1376.         sc->time_rate=1;

  1377.     if(!sc->time_scale)

  1378.         sc->time_scale= c->time_scale;

  1379.     av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);

  1380. 

  1381.     if (st->codec->codec_type == CODEC_TYPE_AUDIO &&

  1382.         !st->codec->frame_size && sc->stts_count == 1) {

  1383.         st->codec->frame_size = av_rescale(sc->stts_data[0].duration,

  1384.                                            st->codec->sample_rate, sc->time_scale);

  1385.         dprintf(c->fc, "frame size %d\n", st->codec->frame_size);

  1386.     }

  1387. 

  1388.     if(st->duration != AV_NOPTS_VALUE){

  1389.         assert(st->duration % sc->time_rate == 0);

  1390.         st->duration /= sc->time_rate;

  1391.     }

  1392. 

  1393.     mov_build_index(c, st);

  1394. 

  1395.     if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {

  1396.         if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)

  1397.             av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",

  1398.                    st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));

  1399.     } else

  1400.         sc->pb = c->fc->pb;

  1401. 

  1402.     switch (st->codec->codec_id) {

  1403. #if CONFIG_H261_DECODER

  1404.     case CODEC_ID_H261:

  1405. #endif

  1406. #if CONFIG_H263_DECODER

  1407.     case CODEC_ID_H263:

  1408. #endif

  1409. #if CONFIG_MPEG4_DECODER

  1410.     case CODEC_ID_MPEG4:

  1411. #endif

  1412.         st->codec->width= 0; /* let decoder init width/height */

  1413.         st->codec->height= 0;

  1414.         break;

  1415.     }

  1416. 

  1417.     /* Do not need those anymore. */

  1418.     av_freep(&sc->chunk_offsets);

  1419.     av_freep(&sc->stsc_data);

  1420.     av_freep(&sc->sample_sizes);

  1421.     av_freep(&sc->keyframes);

  1422.     av_freep(&sc->stts_data);

  1423. 

  1424.     return 0;

  1425. }

  1426. 

  1427. static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1428. {

  1429.     int ret;

  1430.     c->itunes_metadata = 1;

  1431.     ret = mov_read_default(c, pb, atom);

  1432.     c->itunes_metadata = 0;

  1433.     return ret;

  1434. }

  1435. 

  1436. static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1437. {

  1438.     url_fskip(pb, 4); // version + flags

  1439.     atom.size -= 4;

  1440.     return mov_read_default(c, pb, atom);

  1441. }

  1442. 

  1443. static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1444. {

  1445.     char track[16];

  1446.     get_be32(pb); // type

  1447.     get_be32(pb); // unknown

  1448.     snprintf(track, sizeof(track), "%d", get_be32(pb));

  1449.     av_metadata_set(&c->fc->metadata, "track", track);

  1450.     dprintf(c->fc, "%.4s %s\n", (char*)&atom.type, track);

  1451.     return 0;

  1452. }

  1453. 

  1454. static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1455. {

  1456.     char str[1024], key2[16], language[4] = {0};

  1457.     const char *key = NULL;

  1458.     uint16_t str_size;

  1459. 

  1460.     if (c->itunes_metadata) {

  1461.         int data_size = get_be32(pb);

  1462.         int tag = get_le32(pb);

  1463.         if (tag == MKTAG('d','a','t','a')) {

  1464.             get_be32(pb); // type

  1465.             get_be32(pb); // unknown

  1466.             str_size = data_size - 16;

  1467.             atom.size -= 16;

  1468.         } else return 0;

  1469.     } else {

  1470.         str_size = get_be16(pb); // string length

  1471.         ff_mov_lang_to_iso639(get_be16(pb), language);

  1472.         atom.size -= 4;

  1473.     }

  1474.     switch (atom.type) {

  1475.     case MKTAG(0xa9,'n','a','m'): key = "title";     break;

  1476.     case MKTAG(0xa9,'a','u','t'):

  1477.     case MKTAG(0xa9,'A','R','T'):

  1478.     case MKTAG(0xa9,'w','r','t'): key = "author";    break;

  1479.     case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;

  1480.     case MKTAG(0xa9,'c','m','t'):

  1481.     case MKTAG(0xa9,'i','n','f'): key = "comment";   break;

  1482.     case MKTAG(0xa9,'a','l','b'): key = "album";     break;

  1483.     case MKTAG(0xa9,'d','a','y'): key = "year";      break;

  1484.     case MKTAG(0xa9,'g','e','n'): key = "genre";     break;

  1485.     case MKTAG(0xa9,'t','o','o'):

  1486.     case MKTAG(0xa9,'e','n','c'): key = "muxer";     break;

  1487.     }

  1488.     if (!key)

  1489.         return 0;

  1490.     if (atom.size < 0)

  1491.         return -1;

  1492. 

  1493.     str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);

  1494.     get_buffer(pb, str, str_size);

  1495.     str[str_size] = 0;

  1496.     av_metadata_set(&c->fc->metadata, key, str);

  1497.     if (*language && strcmp(language, "und")) {

  1498.         snprintf(key2, sizeof(key2), "%s-%s", key, language);

  1499.         av_metadata_set(&c->fc->metadata, key2, str);

  1500.     }

  1501.     dprintf(c->fc, "%.4s %s %d %lld\n", (char*)&atom.type, str, str_size, atom.size);

  1502.     return 0;

  1503. }

  1504. 

  1505. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1506. {

  1507.     int i;

  1508.     int width;

  1509.     int height;

  1510.     int64_t disp_transform[2];

  1511.     int display_matrix[3][2];

  1512.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1513.     MOVStreamContext *sc = st->priv_data;

  1514.     int version = get_byte(pb);

  1515. 

  1516.     get_be24(pb); /* flags */

  1517.     /*

  1518.     MOV_TRACK_ENABLED 0x0001

  1519.     MOV_TRACK_IN_MOVIE 0x0002

  1520.     MOV_TRACK_IN_PREVIEW 0x0004

  1521.     MOV_TRACK_IN_POSTER 0x0008

  1522.     */

  1523. 

  1524.     if (version == 1) {

  1525.         get_be64(pb);

  1526.         get_be64(pb);

  1527.     } else {

  1528.         get_be32(pb); /* creation time */

  1529.         get_be32(pb); /* modification time */

  1530.     }

  1531.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1532.     get_be32(pb); /* reserved */

  1533. 

  1534.     /* highlevel (considering edits) duration in movie timebase */

  1535.     (version == 1) ? get_be64(pb) : get_be32(pb);

  1536.     get_be32(pb); /* reserved */

  1537.     get_be32(pb); /* reserved */

  1538. 

  1539.     get_be16(pb); /* layer */

  1540.     get_be16(pb); /* alternate group */

  1541.     get_be16(pb); /* volume */

  1542.     get_be16(pb); /* reserved */

  1543. 

  1544.     //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)

  1545.     // they're kept in fixed point format through all calculations

  1546.     // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio

  1547.     for (i = 0; i < 3; i++) {

  1548.         display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point

  1549.         display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point

  1550.         get_be32(pb);           // 2.30 fixed point (not used)

  1551.     }

  1552. 

  1553.     width = get_be32(pb);       // 16.16 fixed point track width

  1554.     height = get_be32(pb);      // 16.16 fixed point track height

  1555.     sc->width = width >> 16;

  1556.     sc->height = height >> 16;

  1557. 

  1558.     //transform the display width/height according to the matrix

  1559.     // skip this if the display matrix is the default identity matrix

  1560.     // to keep the same scale, use [width height 1<<16]

  1561.     if (width && height &&

  1562.         (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||

  1563.         display_matrix[1][0]           || display_matrix[1][1] != 65536  ||

  1564.         display_matrix[2][0]           || display_matrix[2][1])) {

  1565.         for (i = 0; i < 2; i++)

  1566.             disp_transform[i] =

  1567.                 (int64_t)  width  * display_matrix[0][i] +

  1568.                 (int64_t)  height * display_matrix[1][i] +

  1569.                 ((int64_t) display_matrix[2][i] << 16);

  1570. 

  1571.         //sample aspect ratio is new width/height divided by old width/height

  1572.         st->sample_aspect_ratio = av_d2q(

  1573.             ((double) disp_transform[0] * height) /

  1574.             ((double) disp_transform[1] * width), INT_MAX);

  1575.     }

  1576.     return 0;

  1577. }

  1578. 

  1579. static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1580. {

  1581.     MOVFragment *frag = &c->fragment;

  1582.     MOVTrackExt *trex = NULL;

  1583.     int flags, track_id, i;

  1584. 

  1585.     get_byte(pb); /* version */

  1586.     flags = get_be24(pb);

  1587. 

  1588.     track_id = get_be32(pb);

  1589.     if (!track_id)

  1590.         return -1;

  1591.     frag->track_id = track_id;

  1592.     for (i = 0; i < c->trex_count; i++)

  1593.         if (c->trex_data[i].track_id == frag->track_id) {

  1594.             trex = &c->trex_data[i];

  1595.             break;

  1596.         }

  1597.     if (!trex) {

  1598.         av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");

  1599.         return -1;

  1600.     }

  1601. 

  1602.     if (flags & 0x01) frag->base_data_offset = get_be64(pb);

  1603.     else              frag->base_data_offset = frag->moof_offset;

  1604.     if (flags & 0x02) frag->stsd_id          = get_be32(pb);

  1605.     else              frag->stsd_id          = trex->stsd_id;

  1606. 

  1607.     frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;

  1608.     frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;

  1609.     frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;

  1610.     dprintf(c->fc, "frag flags 0x%x\n", frag->flags);

  1611.     return 0;

  1612. }

  1613. 

  1614. static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1615. {

  1616.     MOVTrackExt *trex;

  1617. 

  1618.     if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))

  1619.         return -1;

  1620.     trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));

  1621.     if (!trex)

  1622.         return AVERROR(ENOMEM);

  1623.     c->trex_data = trex;

  1624.     trex = &c->trex_data[c->trex_count++];

  1625.     get_byte(pb); /* version */

  1626.     get_be24(pb); /* flags */

  1627.     trex->track_id = get_be32(pb);

  1628.     trex->stsd_id  = get_be32(pb);

  1629.     trex->duration = get_be32(pb);

  1630.     trex->size     = get_be32(pb);

  1631.     trex->flags    = get_be32(pb);

  1632.     return 0;

  1633. }

  1634. 

  1635. static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1636. {

  1637.     MOVFragment *frag = &c->fragment;

  1638.     AVStream *st = NULL;

  1639.     MOVStreamContext *sc;

  1640.     uint64_t offset;

  1641.     int64_t dts;

  1642.     int data_offset = 0;

  1643.     unsigned entries, first_sample_flags = frag->flags;

  1644.     int flags, distance, i;

  1645. 

  1646.     for (i = 0; i < c->fc->nb_streams; i++) {

  1647.         if (c->fc->streams[i]->id == frag->track_id) {

  1648.             st = c->fc->streams[i];

  1649.             break;

  1650.         }

  1651.     }

  1652.     if (!st) {

  1653.         av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);

  1654.         return -1;

  1655.     }

  1656.     sc = st->priv_data;

  1657.     if (sc->pseudo_stream_id+1 != frag->stsd_id)

  1658.         return 0;

  1659.     get_byte(pb); /* version */

  1660.     flags = get_be24(pb);

  1661.     entries = get_be32(pb);

  1662.     dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);

  1663.     if (flags & 0x001) data_offset        = get_be32(pb);

  1664.     if (flags & 0x004) first_sample_flags = get_be32(pb);

  1665.     if (flags & 0x800) {

  1666.         MOVStts *ctts_data;

  1667.         if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))

  1668.             return -1;

  1669.         ctts_data = av_realloc(sc->ctts_data,

  1670.                                (entries+sc->ctts_count)*sizeof(*sc->ctts_data));

  1671.         if (!ctts_data)

  1672.             return AVERROR(ENOMEM);

  1673.         sc->ctts_data = ctts_data;

  1674.     }

  1675.     dts = st->duration;

  1676.     offset = frag->base_data_offset + data_offset;

  1677.     distance = 0;

  1678.     dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);

  1679.     for (i = 0; i < entries; i++) {

  1680.         unsigned sample_size = frag->size;

  1681.         int sample_flags = i ? frag->flags : first_sample_flags;

  1682.         unsigned sample_duration = frag->duration;

  1683.         int keyframe;

  1684. 

  1685.         if (flags & 0x100) sample_duration = get_be32(pb);

  1686.         if (flags & 0x200) sample_size     = get_be32(pb);

  1687.         if (flags & 0x400) sample_flags    = get_be32(pb);

  1688.         if (flags & 0x800) {

  1689.             sc->ctts_data[sc->ctts_count].count = 1;

  1690.             sc->ctts_data[sc->ctts_count].duration = get_be32(pb);

  1691.             sc->ctts_count++;

  1692.         }

  1693.         if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||

  1694.              (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))

  1695.             distance = 0;

  1696.         av_add_index_entry(st, offset, dts, sample_size, distance,

  1697.                            keyframe ? AVINDEX_KEYFRAME : 0);

  1698.         dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "

  1699.                 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,

  1700.                 offset, dts, sample_size, distance, keyframe);

  1701.         distance++;

  1702.         assert(sample_duration % sc->time_rate == 0);

  1703.         dts += sample_duration / sc->time_rate;

  1704.         offset += sample_size;

  1705.     }

  1706.     frag->moof_offset = offset;

  1707.     sc->sample_count = st->nb_index_entries;

  1708.     st->duration = dts;

  1709.     return 0;

  1710. }

  1711. 

  1712. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1713. /* like the files created with Adobe Premiere 5.0, for samples see */

  1714. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1715. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1716. {

  1717.     int err;

  1718. 

  1719.     if (atom.size < 8)

  1720.         return 0; /* continue */

  1721.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1722.         url_fskip(pb, atom.size - 4);

  1723.         return 0;

  1724.     }

  1725.     atom.type = get_le32(pb);

  1726.     atom.offset += 8;

  1727.     atom.size -= 8;

  1728.     if (atom.type != MKTAG('m','d','a','t')) {

  1729.         url_fskip(pb, atom.size);

  1730.         return 0;

  1731.     }

  1732.     err = mov_read_mdat(c, pb, atom);

  1733.     return err;

  1734. }

  1735. 

  1736. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1737. {

  1738. #if CONFIG_ZLIB

  1739.     ByteIOContext ctx;

  1740.     uint8_t *cmov_data;

  1741.     uint8_t *moov_data; /* uncompressed data */

  1742.     long cmov_len, moov_len;

  1743.     int ret = -1;

  1744. 

  1745.     get_be32(pb); /* dcom atom */

  1746.     if (get_le32(pb) != MKTAG('d','c','o','m'))

  1747.         return -1;

  1748.     if (get_le32(pb) != MKTAG('z','l','i','b')) {

  1749.         av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");

  1750.         return -1;

  1751.     }

  1752.     get_be32(pb); /* cmvd atom */

  1753.     if (get_le32(pb) != MKTAG('c','m','v','d'))

  1754.         return -1;

  1755.     moov_len = get_be32(pb); /* uncompressed size */

  1756.     cmov_len = atom.size - 6 * 4;

  1757. 

  1758.     cmov_data = av_malloc(cmov_len);

  1759.     if (!cmov_data)

  1760.         return AVERROR(ENOMEM);

  1761.     moov_data = av_malloc(moov_len);

  1762.     if (!moov_data) {

  1763.         av_free(cmov_data);

  1764.         return AVERROR(ENOMEM);

  1765.     }

  1766.     get_buffer(pb, cmov_data, cmov_len);

  1767.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1768.         goto free_and_return;

  1769.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)

  1770.         goto free_and_return;

  1771.     atom.type = MKTAG('m','o','o','v');

  1772.     atom.offset = 0;

  1773.     atom.size = moov_len;

  1774. #ifdef DEBUG

  1775. //    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1776. #endif

  1777.     ret = mov_read_default(c, &ctx, atom);

  1778. free_and_return:

  1779.     av_free(moov_data);

  1780.     av_free(cmov_data);

  1781.     return ret;

  1782. #else

  1783.     av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");

  1784.     return -1;

  1785. #endif

  1786. }

  1787. 

  1788. /* edit list atom */

  1789. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)

  1790. {

  1791.     MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;

  1792.     int i, edit_count;

  1793. 

  1794.     get_byte(pb); /* version */

  1795.     get_be24(pb); /* flags */

  1796.     edit_count = get_be32(pb); /* entries */

  1797. 

  1798.     for(i=0; i<edit_count; i++){

  1799.         int time;

  1800.         get_be32(pb); /* Track duration */

  1801.         time = get_be32(pb); /* Media time */

  1802.         get_be32(pb); /* Media rate */

  1803.         if (i == 0 && time != -1) {

  1804.             sc->time_offset = time;

  1805.             sc->time_rate = av_gcd(sc->time_rate, time);

  1806.         }

  1807.     }

  1808. 

  1809.     if(edit_count > 1)

  1810.         av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "

  1811.                "a/v desync might occur, patch welcome\n");

  1812. 

  1813.     dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);

  1814.     return 0;

  1815. }

  1816. 

  1817. static const MOVParseTableEntry mov_default_parse_table[] = {

  1818. { MKTAG('a','v','s','s'), mov_read_extradata },

  1819. { MKTAG('c','o','6','4'), mov_read_stco },

  1820. { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */

  1821. { MKTAG('d','i','n','f'), mov_read_default },

  1822. { MKTAG('d','r','e','f'), mov_read_dref },

  1823. { MKTAG('e','d','t','s'), mov_read_default },

  1824. { MKTAG('e','l','s','t'), mov_read_elst },

  1825. { MKTAG('e','n','d','a'), mov_read_enda },

  1826. { MKTAG('f','i','e','l'), mov_read_extradata },

  1827. { MKTAG('f','t','y','p'), mov_read_ftyp },

  1828. { MKTAG('g','l','b','l'), mov_read_glbl },

  1829. { MKTAG('h','d','l','r'), mov_read_hdlr },

  1830. { MKTAG('i','l','s','t'), mov_read_ilst },

  1831. { MKTAG('j','p','2','h'), mov_read_extradata },

  1832. { MKTAG('m','d','a','t'), mov_read_mdat },

  1833. { MKTAG('m','d','h','d'), mov_read_mdhd },

  1834. { MKTAG('m','d','i','a'), mov_read_default },

  1835. { MKTAG('m','e','t','a'), mov_read_meta },

  1836. { MKTAG('m','i','n','f'), mov_read_default },

  1837. { MKTAG('m','o','o','f'), mov_read_moof },

  1838. { MKTAG('m','o','o','v'), mov_read_moov },

  1839. { MKTAG('m','v','e','x'), mov_read_default },

  1840. { MKTAG('m','v','h','d'), mov_read_mvhd },

  1841. { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */

  1842. { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */

  1843. { MKTAG('a','v','c','C'), mov_read_glbl },

  1844. { MKTAG('p','a','s','p'), mov_read_pasp },

  1845. { MKTAG('s','t','b','l'), mov_read_default },

  1846. { MKTAG('s','t','c','o'), mov_read_stco },

  1847. { MKTAG('s','t','s','c'), mov_read_stsc },

  1848. { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */

  1849. { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */

  1850. { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */

  1851. { MKTAG('s','t','t','s'), mov_read_stts },

  1852. { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */

  1853. { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */

  1854. { MKTAG('t','r','a','k'), mov_read_trak },

  1855. { MKTAG('t','r','a','f'), mov_read_default },

  1856. { MKTAG('t','r','e','x'), mov_read_trex },

  1857. { MKTAG('t','r','k','n'), mov_read_trkn },

  1858. { MKTAG('t','r','u','n'), mov_read_trun },

  1859. { MKTAG('u','d','t','a'), mov_read_default },

  1860. { MKTAG('w','a','v','e'), mov_read_wave },

  1861. { MKTAG('e','s','d','s'), mov_read_esds },

  1862. { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */

  1863. { MKTAG('c','m','o','v'), mov_read_cmov },

  1864. { MKTAG(0xa9,'n','a','m'), mov_read_udta_string },

  1865. { MKTAG(0xa9,'w','r','t'), mov_read_udta_string },

  1866. { MKTAG(0xa9,'c','p','y'), mov_read_udta_string },

  1867. { MKTAG(0xa9,'i','n','f'), mov_read_udta_string },

  1868. { MKTAG(0xa9,'i','n','f'), mov_read_udta_string },

  1869. { MKTAG(0xa9,'A','R','T'), mov_read_udta_string },

  1870. { MKTAG(0xa9,'a','l','b'), mov_read_udta_string },

  1871. { MKTAG(0xa9,'c','m','t'), mov_read_udta_string },

  1872. { MKTAG(0xa9,'a','u','t'), mov_read_udta_string },

  1873. { MKTAG(0xa9,'d','a','y'), mov_read_udta_string },

  1874. { MKTAG(0xa9,'g','e','n'), mov_read_udta_string },

  1875. { MKTAG(0xa9,'e','n','c'), mov_read_udta_string },

  1876. { MKTAG(0xa9,'t','o','o'), mov_read_udta_string },

  1877. { 0, NULL }

  1878. };

  1879. 

  1880. static int mov_probe(AVProbeData *p)

  1881. {

  1882.     unsigned int offset;

  1883.     uint32_t tag;

  1884.     int score = 0;

  1885. 

  1886.     /* check file header */

  1887.     offset = 0;

  1888.     for(;;) {

  1889.         /* ignore invalid offset */

  1890.         if ((offset + 8) > (unsigned int)p->buf_size)

  1891.             return score;

  1892.         tag = AV_RL32(p->buf + offset + 4);

  1893.         switch(tag) {

  1894.         /* check for obvious tags */

  1895.         case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */

  1896.         case MKTAG('m','o','o','v'):

  1897.         case MKTAG('m','d','a','t'):

  1898.         case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */

  1899.         case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */

  1900.         case MKTAG('f','t','y','p'):

  1901.             return AVPROBE_SCORE_MAX;

  1902.         /* those are more common words, so rate then a bit less */

  1903.         case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */

  1904.         case MKTAG('w','i','d','e'):

  1905.         case MKTAG('f','r','e','e'):

  1906.         case MKTAG('j','u','n','k'):

  1907.         case MKTAG('p','i','c','t'):

  1908.             return AVPROBE_SCORE_MAX - 5;

  1909.         case MKTAG(0x82,0x82,0x7f,0x7d):

  1910.         case MKTAG('s','k','i','p'):

  1911.         case MKTAG('u','u','i','d'):

  1912.         case MKTAG('p','r','f','l'):

  1913.             offset = AV_RB32(p->buf+offset) + offset;

  1914.             /* if we only find those cause probedata is too small at least rate them */

  1915.             score = AVPROBE_SCORE_MAX - 50;

  1916.             break;

  1917.         default:

  1918.             /* unrecognized tag */

  1919.             return score;

  1920.         }

  1921.     }

  1922.     return score;

  1923. }

  1924. 

  1925. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1926. {

  1927.     MOVContext *mov = s->priv_data;

  1928.     ByteIOContext *pb = s->pb;

  1929.     int err;

  1930.     MOVAtom atom = { 0, 0, 0 };

  1931. 

  1932.     mov->fc = s;

  1933.     /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1934.     if(!url_is_streamed(pb))

  1935.         atom.size = url_fsize(pb);

  1936.     else

  1937.         atom.size = INT64_MAX;

  1938. 

  1939.     /* check MOV header */

  1940.     if ((err = mov_read_default(mov, pb, atom)) < 0) {

  1941.         av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);

  1942.         return err;

  1943.     }

  1944.     if (!mov->found_moov) {

  1945.         av_log(s, AV_LOG_ERROR, "moov atom not found\n");

  1946.         return -1;

  1947.     }

  1948.     dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));

  1949. 

  1950.     return 0;

  1951. }

  1952. 

  1953. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1954. {

  1955.     MOVContext *mov = s->priv_data;

  1956.     MOVStreamContext *sc = 0;

  1957.     AVIndexEntry *sample = 0;

  1958.     int64_t best_dts = INT64_MAX;

  1959.     int i, ret;

  1960.  retry:

  1961.     for (i = 0; i < s->nb_streams; i++) {

  1962.         AVStream *st = s->streams[i];

  1963.         MOVStreamContext *msc = st->priv_data;

  1964.         if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {

  1965.             AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];

  1966.             int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,

  1967.                                      AV_TIME_BASE, msc->time_scale);

  1968.             dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);

  1969.             if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||

  1970.                 (!url_is_streamed(s->pb) &&

  1971.                  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&

  1972.                  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||

  1973.                   (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {

  1974.                 sample = current_sample;

  1975.                 best_dts = dts;

  1976.                 sc = msc;

  1977.             }

  1978.         }

  1979.     }

  1980.     if (!sample) {

  1981.         mov->found_mdat = 0;

  1982.         if (!url_is_streamed(s->pb) ||

  1983.             mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||

  1984.             url_feof(s->pb))

  1985.             return -1;

  1986.         dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));

  1987.         goto retry;

  1988.     }

  1989.     /* must be done just before reading, to avoid infinite loop on sample */

  1990.     sc->current_sample++;

  1991.     if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {

  1992.         av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",

  1993.                sc->ffindex, sample->pos);

  1994.         return -1;

  1995.     }

  1996.     ret = av_get_packet(sc->pb, pkt, sample->size);

  1997.     if (ret < 0)

  1998.         return ret;

  1999. #if CONFIG_DV_DEMUXER

  2000.     if (mov->dv_demux && sc->dv_audio_container) {

  2001.         dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);

  2002.         av_free(pkt->data);

  2003.         pkt->size = 0;

  2004.         if (dv_get_packet(mov->dv_demux, pkt) < 0)

  2005.             return -1;

  2006.     }

  2007. #endif

  2008.     pkt->stream_index = sc->ffindex;

  2009.     pkt->dts = sample->timestamp;

  2010.     if (sc->ctts_data) {

  2011.         assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);

  2012.         pkt->pts = pkt->dts + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;

  2013.         /* update ctts context */

  2014.         sc->ctts_sample++;

  2015.         if (sc->ctts_index < sc->ctts_count &&

  2016.             sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {

  2017.             sc->ctts_index++;

  2018.             sc->ctts_sample = 0;

  2019.         }

  2020.         if (sc->wrong_dts)

  2021.             pkt->dts = AV_NOPTS_VALUE;

  2022.     } else {

  2023.         AVStream *st = s->streams[sc->ffindex];

  2024.         int64_t next_dts = (sc->current_sample < sc->sample_count) ?

  2025.             st->index_entries[sc->current_sample].timestamp : st->duration;

  2026.         pkt->duration = next_dts - pkt->dts;

  2027.         pkt->pts = pkt->dts;

  2028.     }

  2029.     pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;

  2030.     pkt->pos = sample->pos;

  2031.     dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",

  2032.             pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);

  2033.     return 0;

  2034. }

  2035. 

  2036. static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)

  2037. {

  2038.     MOVStreamContext *sc = st->priv_data;

  2039.     int sample, time_sample;

  2040.     int i;

  2041. 

  2042.     sample = av_index_search_timestamp(st, timestamp, flags);

  2043.     dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);

  2044.     if (sample < 0) /* not sure what to do */

  2045.         return -1;

  2046.     sc->current_sample = sample;

  2047.     dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);

  2048.     /* adjust ctts index */

  2049.     if (sc->ctts_data) {

  2050.         time_sample = 0;

  2051.         for (i = 0; i < sc->ctts_count; i++) {

  2052.             int next = time_sample + sc->ctts_data[i].count;

  2053.             if (next > sc->current_sample) {

  2054.                 sc->ctts_index = i;

  2055.                 sc->ctts_sample = sc->current_sample - time_sample;

  2056.                 break;

  2057.             }

  2058.             time_sample = next;

  2059.         }

  2060.     }

  2061.     return sample;

  2062. }

  2063. 

  2064. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)

  2065. {

  2066.     AVStream *st;

  2067.     int64_t seek_timestamp, timestamp;

  2068.     int sample;

  2069.     int i;

  2070. 

  2071.     if (stream_index >= s->nb_streams)

  2072.         return -1;

  2073.     if (sample_time < 0)

  2074.         sample_time = 0;

  2075. 

  2076.     st = s->streams[stream_index];

  2077.     sample = mov_seek_stream(st, sample_time, flags);

  2078.     if (sample < 0)

  2079.         return -1;

  2080. 

  2081.     /* adjust seek timestamp to found sample timestamp */

  2082.     seek_timestamp = st->index_entries[sample].timestamp;

  2083. 

  2084.     for (i = 0; i < s->nb_streams; i++) {

  2085.         st = s->streams[i];

  2086.         if (stream_index == i || st->discard == AVDISCARD_ALL)

  2087.             continue;

  2088. 

  2089.         timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);

  2090.         mov_seek_stream(st, timestamp, flags);

  2091.     }

  2092.     return 0;

  2093. }

  2094. 

  2095. static int mov_read_close(AVFormatContext *s)

  2096. {

  2097.     int i, j;

  2098.     MOVContext *mov = s->priv_data;

  2099.     for(i=0; i<s->nb_streams; i++) {

  2100.         MOVStreamContext *sc = s->streams[i]->priv_data;

  2101.         av_freep(&sc->ctts_data);

  2102.         for (j=0; j<sc->drefs_count; j++)

  2103.             av_freep(&sc->drefs[j].path);

  2104.         av_freep(&sc->drefs);

  2105.         if (sc->pb && sc->pb != s->pb)

  2106.             url_fclose(sc->pb);

  2107.     }

  2108.     if(mov->dv_demux){

  2109.         for(i=0; i<mov->dv_fctx->nb_streams; i++){

  2110.             av_freep(&mov->dv_fctx->streams[i]->codec);

  2111.             av_freep(&mov->dv_fctx->streams[i]);

  2112.         }

  2113.         av_freep(&mov->dv_fctx);

  2114.         av_freep(&mov->dv_demux);

  2115.     }

  2116.     av_freep(&mov->trex_data);

  2117.     return 0;

  2118. }

  2119. 

  2120. AVInputFormat mov_demuxer = {

  2121.     "mov,mp4,m4a,3gp,3g2,mj2",

  2122.     NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),

  2123.     sizeof(MOVContext),

  2124.     mov_probe,

  2125.     mov_read_header,

  2126.     mov_read_packet,

  2127.     mov_read_close,

  2128.     mov_read_seek,

  2129. };