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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 "avformat.h"

  27. #include "riff.h"

  28. #include "isom.h"

  29. #include "dv.h"

  30. 

  31. #ifdef CONFIG_ZLIB

  32. #include <zlib.h>

  33. #endif

  34. 

  35. /*

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

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

  38.  *

  39.  * Features and limitations:

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

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

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

  43.  *

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

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

  46.  *

  47.  * Reference documents:

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

  49.  * Apple:

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

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

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

  53.  */

  54. 

  55. #include "qtpalette.h"

  56. 

  57. 

  58. #undef NDEBUG

  59. #include <assert.h>

  60. 

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

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

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

  64.  */

  65. 

  66. typedef struct {

  67.     int first;

  68.     int count;

  69.     int id;

  70. } MOV_stsc_t;

  71. 

  72. typedef struct {

  73.     uint32_t type;

  74.     int64_t offset;

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

  76. } MOV_atom_t;

  77. 

  78. struct MOVParseTableEntry;

  79. 

  80. typedef struct MOVStreamContext {

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

  82.     int next_chunk;

  83.     unsigned int chunk_count;

  84.     int64_t *chunk_offsets;

  85.     unsigned int stts_count;

  86.     MOV_stts_t *stts_data;

  87.     unsigned int ctts_count;

  88.     MOV_stts_t *ctts_data;

  89.     unsigned int edit_count; /* number of 'edit' (elst atom) */

  90.     unsigned int sample_to_chunk_sz;

  91.     MOV_stsc_t *sample_to_chunk;

  92.     int sample_to_ctime_index;

  93.     int sample_to_ctime_sample;

  94.     unsigned int sample_size;

  95.     unsigned int sample_count;

  96.     int *sample_sizes;

  97.     unsigned int keyframe_count;

  98.     int *keyframes;

  99.     int time_scale;

  100.     int time_rate;

  101.     int current_sample;

  102.     unsigned int bytes_per_frame;

  103.     unsigned int samples_per_frame;

  104.     int dv_audio_container;

  105.     int pseudo_stream_id;

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

  107. } MOVStreamContext;

  108. 

  109. typedef struct MOVContext {

  110.     AVFormatContext *fc;

  111.     int time_scale;

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

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

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

  115.     AVPaletteControl palette_control;

  116.     DVDemuxContext *dv_demux;

  117.     AVFormatContext *dv_fctx;

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

  119. } MOVContext;

  120. 

  121. 

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

  123. 

  124. /* those functions parse an atom */

  125. /* return code:

  126.  1: found what I wanted, exit

  127.  0: continue to parse next atom

  128.  -1: error occured, exit

  129.  */

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

  131. typedef struct MOVParseTableEntry {

  132.     uint32_t type;

  133.     int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);

  134. } MOVParseTableEntry;

  135. 

  136. static const MOVParseTableEntry mov_default_parse_table[];

  137. 

  138. static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  139. {

  140.     int64_t total_size = 0;

  141.     MOV_atom_t a;

  142.     int i;

  143.     int err = 0;

  144. 

  145.     a.offset = atom.offset;

  146. 

  147.     if (atom.size < 0)

  148.         atom.size = INT64_MAX;

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

  150.         a.size = atom.size;

  151.         a.type=0;

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

  153.             a.size = get_be32(pb);

  154.             a.type = get_le32(pb);

  155.         }

  156.         total_size += 8;

  157.         a.offset += 8;

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

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

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

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

  162.             a.offset += 8;

  163.             total_size += 8;

  164.         }

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

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

  167.             if (a.size <= 8)

  168.                 break;

  169.         }

  170.         a.size -= 8;

  171.         if(a.size < 0)

  172.             break;

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

  174. 

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

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

  177.             /* empty */;

  178. 

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

  180.             url_fskip(pb, a.size);

  181.         } else {

  182.             offset_t start_pos = url_ftell(pb);

  183.             int64_t left;

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

  185.             if (c->found_moov && c->found_mdat)

  186.                 break;

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

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

  189.                 url_fskip(pb, left);

  190.         }

  191. 

  192.         a.offset += a.size;

  193.         total_size += a.size;

  194.     }

  195. 

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

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

  198.     }

  199. 

  200.     return err;

  201. }

  202. 

  203. static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  204. {

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

  206.     uint32_t type;

  207.     uint32_t ctype;

  208. 

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

  210.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  211. 

  212.     /* component type */

  213.     ctype = get_le32(pb);

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

  215. 

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

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

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

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

  220.     if(!ctype)

  221.         c->isom = 1;

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

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

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

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

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

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

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

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

  230.     }

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

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

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

  234. 

  235.     if(atom.size <= 24)

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

  237. 

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

  239.     return 0;

  240. }

  241. 

  242. static int mp4_read_descr_len(ByteIOContext *pb)

  243. {

  244.     int len = 0;

  245.     int count = 4;

  246.     while (count--) {

  247.         int c = get_byte(pb);

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

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

  250.             break;

  251.     }

  252.     return len;

  253. }

  254. 

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

  256. {

  257.     int len;

  258.     *tag = get_byte(pb);

  259.     len = mp4_read_descr_len(pb);

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

  261.     return len;

  262. }

  263. 

  264. #define MP4ESDescrTag                   0x03

  265. #define MP4DecConfigDescrTag            0x04

  266. #define MP4DecSpecificDescrTag          0x05

  267. 

  268. static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  269. {

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

  271.     int tag, len;

  272. 

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

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

  275.     if (tag == MP4ESDescrTag) {

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

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

  278.     } else

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

  280. 

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

  282.     if (tag == MP4DecConfigDescrTag) {

  283.         int object_type_id = get_byte(pb);

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

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

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

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

  288. 

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

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

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

  292.         if (tag == MP4DecSpecificDescrTag) {

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

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

  295.                 return -1;

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

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

  298.                 return AVERROR(ENOMEM);

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

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

  301.             /* from mplayer */

  302.             if ((*st->codec->extradata >> 3) == 29) {

  303.                 st->codec->codec_id = CODEC_ID_MP3ON4;

  304.             }

  305.         }

  306.     }

  307.     return 0;

  308. }

  309. 

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

  311. static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  312. {

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

  314.         return 0;

  315.     c->found_mdat=1;

  316.     if(c->found_moov)

  317.         return 1; /* found both, just go */

  318.     url_fskip(pb, atom.size);

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

  320. }

  321. 

  322. static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  323. {

  324.     uint32_t type = get_le32(pb);

  325. 

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

  327.         c->isom = 1;

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

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

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

  331.     return 0;

  332. }

  333. 

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

  335. static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  336. {

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

  338.         return -1;

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

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

  341.     c->found_moov=1;

  342.     if(c->found_mdat)

  343.         return 1; /* found both, just go */

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

  345. }

  346. 

  347. 

  348. static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  349. {

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

  351.     MOVStreamContext *sc = st->priv_data;

  352.     int version = get_byte(pb);

  353.     int lang;

  354. 

  355.     if (version > 1)

  356.         return 1; /* unsupported */

  357. 

  358.     get_byte(pb); get_byte(pb);

  359.     get_byte(pb); /* flags */

  360. 

  361.     if (version == 1) {

  362.         get_be64(pb);

  363.         get_be64(pb);

  364.     } else {

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

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

  367.     }

  368. 

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

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

  371. 

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

  373.     ff_mov_lang_to_iso639(lang, st->language);

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

  375. 

  376.     return 0;

  377. }

  378. 

  379. static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  380. {

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

  382.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  383. 

  384.     if (version == 1) {

  385.         get_be64(pb);

  386.         get_be64(pb);

  387.     } else {

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

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

  390.     }

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

  392. 

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

  394. 

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

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

  397. 

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

  399. 

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

  401. 

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

  403. 

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

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

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

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

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

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

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

  411. 

  412.     return 0;

  413. }

  414. 

  415. static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  416. {

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

  418. 

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

  420.         return -1;

  421. 

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

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

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

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

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

  427.         return AVERROR(ENOMEM);

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

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

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

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

  432.     return 0;

  433. }

  434. 

  435. static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  436. {

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

  438.     int little_endian = get_be16(pb);

  439. 

  440.     if (little_endian) {

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

  442.         case CODEC_ID_PCM_S24BE:

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

  444.             break;

  445.         case CODEC_ID_PCM_S32BE:

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

  447.             break;

  448.         default:

  449.             break;

  450.         }

  451.     }

  452.     return 0;

  453. }

  454. 

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

  456. static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  457. {

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

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

  460.     uint8_t *buf;

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

  462.         return -1;

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

  464.     if(!buf)

  465.         return -1;

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

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

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

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

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

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

  472.     return 0;

  473. }

  474. 

  475. static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  476. {

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

  478. 

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

  480.         return -1;

  481. 

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

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

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

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

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

  487.             return AVERROR(ENOMEM);

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

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

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

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

  492.             return -1;

  493.     } else

  494.         url_fskip(pb, atom.size);

  495.     return 0;

  496. }

  497. 

  498. /**

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

  500.  * nor size unlike mov_read_extradata.

  501.  */

  502. static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  503. {

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

  505. 

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

  507.         return -1;

  508. 

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

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

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

  512.         return AVERROR(ENOMEM);

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

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

  515.     return 0;

  516. }

  517. 

  518. static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  519. {

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

  521.     MOVStreamContext *sc = st->priv_data;

  522.     unsigned int i, entries;

  523. 

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

  525.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  526. 

  527.     entries = get_be32(pb);

  528. 

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

  530.         return -1;

  531. 

  532.     sc->chunk_count = entries;

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

  534.     if (!sc->chunk_offsets)

  535.         return -1;

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

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

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

  539.         }

  540.     } else if (atom.type == MKTAG('c', 'o', '6', '4')) {

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

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

  543.         }

  544.     } else

  545.         return -1;

  546. 

  547.     return 0;

  548. }

  549. 

  550. static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  551. {

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

  553.     MOVStreamContext *sc = st->priv_data;

  554.     int entries, frames_per_sample;

  555.     uint32_t format;

  556.     uint8_t codec_name[32];

  557. 

  558.     /* for palette traversal */

  559.     unsigned int color_depth;

  560.     unsigned int color_start;

  561.     unsigned int color_count;

  562.     unsigned int color_end;

  563.     int color_index;

  564.     int color_dec;

  565.     int color_greyscale;

  566.     const uint8_t *color_table;

  567.     int j, pseudo_stream_id;

  568.     unsigned char r, g, b;

  569. 

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

  571.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  572. 

  573.     entries = get_be32(pb);

  574. 

  575.     for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { //Parsing Sample description table

  576.         enum CodecID id;

  577.         MOV_atom_t a = { 0, 0, 0 };

  578.         offset_t start_pos = url_ftell(pb);

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

  580.         format = get_le32(pb); /* data format */

  581. 

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

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

  584.         get_be16(pb); /* index */

  585. 

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

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

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

  589.            ){

  590.             /* multiple fourcc, we skip jpeg, this isnt correct, we should export it as

  591.                seperate AVStream but this needs a few changes in the mov demuxer, patch

  592.                welcome */

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

  594.             continue;

  595.         }

  596.         sc->pseudo_stream_id= pseudo_stream_id;

  597. 

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

  599.         id = codec_get_id(codec_movaudio_tags, format);

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

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

  602. 

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

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

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

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

  607.             id = codec_get_id(codec_movvideo_tags, format);

  608.             if (id <= 0)

  609.                 id = codec_get_id(codec_bmp_tags, format);

  610.             if (id > 0)

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

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

  613.                 id = codec_get_id(ff_codec_movsubtitle_tags, format);

  614.                 if(id > 0)

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

  616.             }

  617.         }

  618. 

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

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

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

  622. 

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

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

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

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

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

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

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

  630. 

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

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

  633. 

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

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

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

  637.             frames_per_sample = get_be16(pb); /* frames per samples */

  638. 

  639.             dprintf(c->fc, "frames/samples = %d\n", frames_per_sample);

  640. 

  641.             get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */

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

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

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

  645.             }

  646. 

  647.             st->codec->bits_per_sample = get_be16(pb); /* depth */

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

  649. 

  650.             /* figure out the palette situation */

  651.             color_depth = st->codec->bits_per_sample & 0x1F;

  652.             color_greyscale = st->codec->bits_per_sample & 0x20;

  653. 

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

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

  656.                 (color_depth == 8)) {

  657.                 if (color_greyscale) {

  658.                     /* compute the greyscale palette */

  659.                     color_count = 1 << color_depth;

  660.                     color_index = 255;

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

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

  663.                         r = g = b = color_index;

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

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

  666.                         color_index -= color_dec;

  667.                         if (color_index < 0)

  668.                             color_index = 0;

  669.                     }

  670.                 } else if (st->codec->color_table_id & 0x08) {

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

  672.                     color_count = 1 << color_depth;

  673.                     if (color_depth == 2)

  674.                         color_table = ff_qt_default_palette_4;

  675.                     else if (color_depth == 4)

  676.                         color_table = ff_qt_default_palette_16;

  677.                     else

  678.                         color_table = ff_qt_default_palette_256;

  679. 

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

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

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

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

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

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

  686.                     }

  687.                 } else {

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

  689.                     color_start = get_be32(pb);

  690.                     color_count = get_be16(pb);

  691.                     color_end = get_be16(pb);

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

  693.                         (color_end <= 255)) {

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

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

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

  697.                              * up front */

  698.                             get_byte(pb);

  699.                             get_byte(pb);

  700.                             r = get_byte(pb);

  701.                             get_byte(pb);

  702.                             g = get_byte(pb);

  703.                             get_byte(pb);

  704.                             b = get_byte(pb);

  705.                             get_byte(pb);

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

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

  708.                         }

  709.                     }

  710.                 }

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

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

  713.             } else

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

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

  716.             int bits_per_sample;

  717.             uint16_t version = get_be16(pb);

  718. 

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

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

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

  722. 

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

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

  725.             st->codec->bits_per_sample = get_be16(pb);      /* sample size */

  726. 

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

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

  729. 

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

  731. 

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

  733.             case CODEC_ID_PCM_S8:

  734.             case CODEC_ID_PCM_U8:

  735.                 if (st->codec->bits_per_sample == 16)

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

  737.                 break;

  738.             case CODEC_ID_PCM_S16LE:

  739.             case CODEC_ID_PCM_S16BE:

  740.                 if (st->codec->bits_per_sample == 8)

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

  742.                 else if (st->codec->bits_per_sample == 24)

  743.                     st->codec->codec_id = CODEC_ID_PCM_S24BE;

  744.                 break;

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

  746.             case CODEC_ID_MACE3:

  747.                 sc->samples_per_frame = 6;

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

  749.                 break;

  750.             case CODEC_ID_MACE6:

  751.                 sc->samples_per_frame = 6;

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

  753.                 break;

  754.             case CODEC_ID_ADPCM_IMA_QT:

  755.                 sc->samples_per_frame = 64;

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

  757.                 break;

  758.             default:

  759.                 break;

  760.             }

  761. 

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

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

  764.             if(!c->isom) {

  765.                 if(version==1) {

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

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

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

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

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

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

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

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

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

  775.                     get_be32(pb); /* bits per channel if sound is uncompressed */

  776.                     get_be32(pb); /* lcpm format specific flag */

  777.                     get_be32(pb); /* bytes per audio packet if constant */

  778.                     get_be32(pb); /* lpcm frames per audio packet if constant */

  779.                 }

  780.             }

  781. 

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

  783.             if (bits_per_sample) {

  784.                 st->codec->bits_per_sample = bits_per_sample;

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

  786.             }

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

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

  789.         } else {

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

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

  792.         }

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

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

  795.         if (a.size > 8) {

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

  797.                 return -1;

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

  799.             url_fskip(pb, a.size);

  800.     }

  801. 

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

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

  804.     }

  805. 

  806.     /* special codec parameters handling */

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

  808. #ifdef CONFIG_H261_DECODER

  809.     case CODEC_ID_H261:

  810. #endif

  811. #ifdef CONFIG_H263_DECODER

  812.     case CODEC_ID_H263:

  813. #endif

  814. #ifdef CONFIG_MPEG4_DECODER

  815.     case CODEC_ID_MPEG4:

  816. #endif

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

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

  819.         break;

  820. #ifdef CONFIG_LIBFAAD

  821.     case CODEC_ID_AAC:

  822. #endif

  823. #ifdef CONFIG_VORBIS_DECODER

  824.     case CODEC_ID_VORBIS:

  825. #endif

  826.     case CODEC_ID_MP3ON4:

  827.         st->codec->sample_rate= 0; /* let decoder init parameters properly */

  828.         break;

  829. #ifdef CONFIG_DV_DEMUXER

  830.     case CODEC_ID_DVAUDIO:

  831.         c->dv_fctx = av_alloc_format_context();

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

  833.         if (!c->dv_demux) {

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

  835.             return -1;

  836.         }

  837.         sc->dv_audio_container = 1;

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

  839.         break;

  840. #endif

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

  842.     case CODEC_ID_AMR_WB:

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

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

  845.         break;

  846.     case CODEC_ID_AMR_NB:

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

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

  849.         break;

  850.     case CODEC_ID_MP2:

  851.     case CODEC_ID_MP3:

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

  853.         st->need_parsing = AVSTREAM_PARSE_FULL;

  854.         break;

  855.     case CODEC_ID_ADPCM_MS:

  856.     case CODEC_ID_ADPCM_IMA_WAV:

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

  858.         break;

  859.     default:

  860.         break;

  861.     }

  862. 

  863.     return 0;

  864. }

  865. 

  866. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  867. {

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

  869.     MOVStreamContext *sc = st->priv_data;

  870.     unsigned int i, entries;

  871. 

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

  873.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  874. 

  875.     entries = get_be32(pb);

  876. 

  877.     if(entries >= UINT_MAX / sizeof(MOV_stsc_t))

  878.         return -1;

  879. 

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

  881. 

  882.     sc->sample_to_chunk_sz = entries;

  883.     sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));

  884.     if (!sc->sample_to_chunk)

  885.         return -1;

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

  887.         sc->sample_to_chunk[i].first = get_be32(pb);

  888.         sc->sample_to_chunk[i].count = get_be32(pb);

  889.         sc->sample_to_chunk[i].id = get_be32(pb);

  890.     }

  891.     return 0;

  892. }

  893. 

  894. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  895. {

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

  897.     MOVStreamContext *sc = st->priv_data;

  898.     unsigned int i, entries;

  899. 

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

  901.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  902. 

  903.     entries = get_be32(pb);

  904. 

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

  906.         return -1;

  907. 

  908.     sc->keyframe_count = entries;

  909. 

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

  911. 

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

  913.     if (!sc->keyframes)

  914.         return -1;

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

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

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

  918.     }

  919.     return 0;

  920. }

  921. 

  922. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  923. {

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

  925.     MOVStreamContext *sc = st->priv_data;

  926.     unsigned int i, entries, sample_size;

  927. 

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

  929.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  930. 

  931.     sample_size = get_be32(pb);

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

  933.         sc->sample_size = sample_size;

  934.     entries = get_be32(pb);

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

  936.         return -1;

  937. 

  938.     sc->sample_count = entries;

  939.     if (sample_size)

  940.         return 0;

  941. 

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

  943. 

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

  945.     if (!sc->sample_sizes)

  946.         return -1;

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

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

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

  950.     }

  951.     return 0;

  952. }

  953. 

  954. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  955. {

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

  957.     MOVStreamContext *sc = st->priv_data;

  958.     unsigned int i, entries;

  959.     int64_t duration=0;

  960.     int64_t total_sample_count=0;

  961. 

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

  963.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  964.     entries = get_be32(pb);

  965.     if(entries >= UINT_MAX / sizeof(MOV_stts_t))

  966.         return -1;

  967. 

  968.     sc->stts_count = entries;

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

  970.     if (!sc->stts_data)

  971.         return -1;

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

  973. 

  974.     sc->time_rate=0;

  975. 

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

  977.         int sample_duration;

  978.         int sample_count;

  979. 

  980.         sample_count=get_be32(pb);

  981.         sample_duration = get_be32(pb);

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

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

  984. 

  985.         sc->time_rate= ff_gcd(sc->time_rate, sample_duration);

  986. 

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

  988. 

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

  990.         total_sample_count+=sample_count;

  991.     }

  992. 

  993.     st->nb_frames= total_sample_count;

  994.     if(duration)

  995.         st->duration= duration;

  996.     return 0;

  997. }

  998. 

  999. static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1000. {

  1001.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1002.     MOVStreamContext *sc = st->priv_data;

  1003.     unsigned int i, entries;

  1004. 

  1005.     get_byte(pb); /* version */

  1006.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1007.     entries = get_be32(pb);

  1008.     if(entries >= UINT_MAX / sizeof(MOV_stts_t))

  1009.         return -1;

  1010. 

  1011.     sc->ctts_count = entries;

  1012.     sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));

  1013.     if (!sc->ctts_data)

  1014.         return -1;

  1015.     dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);

  1016. 

  1017.     for(i=0; i<entries; i++) {

  1018.         int count    =get_be32(pb);

  1019.         int duration =get_be32(pb);

  1020. 

  1021.         if (duration < 0) {

  1022.             av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");

  1023.             sc->ctts_count = 0;

  1024.             url_fskip(pb, 8 * (entries - i - 1));

  1025.             break;

  1026.         }

  1027.         sc->ctts_data[i].count   = count;

  1028.         sc->ctts_data[i].duration= duration;

  1029. 

  1030.         sc->time_rate= ff_gcd(sc->time_rate, duration);

  1031.     }

  1032.     return 0;

  1033. }

  1034. 

  1035. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1036. {

  1037.     AVStream *st;

  1038.     MOVStreamContext *sc;

  1039. 

  1040.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1041.     if (!st) return -2;

  1042.     sc = av_mallocz(sizeof(MOVStreamContext));

  1043.     if (!sc) {

  1044.         av_free(st);

  1045.         return -1;

  1046.     }

  1047. 

  1048.     st->priv_data = sc;

  1049.     st->codec->codec_type = CODEC_TYPE_DATA;

  1050.     st->start_time = 0; /* XXX: check */

  1051. 

  1052.     return mov_read_default(c, pb, atom);

  1053. }

  1054. 

  1055. static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)

  1056. {

  1057.     uint16_t str_size = get_be16(pb); /* string length */;

  1058. 

  1059.     get_be16(pb); /* skip language */

  1060.     get_buffer(pb, str, FFMIN(size, str_size));

  1061. }

  1062. 

  1063. static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1064. {

  1065.     uint64_t end = url_ftell(pb) + atom.size;

  1066. 

  1067.     while (url_ftell(pb) + 8 < end) {

  1068.         uint32_t tag_size = get_be32(pb);

  1069.         uint32_t tag      = get_le32(pb);

  1070.         uint64_t next     = url_ftell(pb) + tag_size - 8;

  1071. 

  1072.         if (next > end) // stop if tag_size is wrong

  1073.             break;

  1074. 

  1075.         switch (tag) {

  1076.         case MKTAG(0xa9,'n','a','m'):

  1077.             mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));

  1078.             break;

  1079.         case MKTAG(0xa9,'w','r','t'):

  1080.             mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));

  1081.             break;

  1082.         case MKTAG(0xa9,'c','p','y'):

  1083.             mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));

  1084.             break;

  1085.         case MKTAG(0xa9,'i','n','f'):

  1086.             mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));

  1087.             break;

  1088.         default:

  1089.             break;

  1090.         }

  1091. 

  1092.         url_fseek(pb, next, SEEK_SET);

  1093.     }

  1094. 

  1095.     return 0;

  1096. }

  1097. 

  1098. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1099. {

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

  1101.     int version = get_byte(pb);

  1102. 

  1103.     get_byte(pb); get_byte(pb);

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

  1105.     /*

  1106.     MOV_TRACK_ENABLED 0x0001

  1107.     MOV_TRACK_IN_MOVIE 0x0002

  1108.     MOV_TRACK_IN_PREVIEW 0x0004

  1109.     MOV_TRACK_IN_POSTER 0x0008

  1110.     */

  1111. 

  1112.     if (version == 1) {

  1113.         get_be64(pb);

  1114.         get_be64(pb);

  1115.     } else {

  1116.         get_be32(pb); /* creation time */

  1117.         get_be32(pb); /* modification time */

  1118.     }

  1119.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1120.     get_be32(pb); /* reserved */

  1121.     st->start_time = 0; /* check */

  1122.     (version == 1) ? get_be64(pb) : get_be32(pb); /* highlevel (considering edits) duration in movie timebase */

  1123.     get_be32(pb); /* reserved */

  1124.     get_be32(pb); /* reserved */

  1125. 

  1126.     get_be16(pb); /* layer */

  1127.     get_be16(pb); /* alternate group */

  1128.     get_be16(pb); /* volume */

  1129.     get_be16(pb); /* reserved */

  1130. 

  1131.     url_fskip(pb, 36); /* display matrix */

  1132. 

  1133.     /* those are fixed-point */

  1134.     get_be32(pb); /* track width */

  1135.     get_be32(pb); /* track height */

  1136. 

  1137.     return 0;

  1138. }

  1139. 

  1140. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1141. /* like the files created with Adobe Premiere 5.0, for samples see */

  1142. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1143. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1144. {

  1145.     int err;

  1146. 

  1147.     if (atom.size < 8)

  1148.         return 0; /* continue */

  1149.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1150.         url_fskip(pb, atom.size - 4);

  1151.         return 0;

  1152.     }

  1153.     atom.type = get_le32(pb);

  1154.     atom.offset += 8;

  1155.     atom.size -= 8;

  1156.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1157.         url_fskip(pb, atom.size);

  1158.         return 0;

  1159.     }

  1160.     err = mov_read_mdat(c, pb, atom);

  1161.     return err;

  1162. }

  1163. 

  1164. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1165. {

  1166. #ifdef CONFIG_ZLIB

  1167.     ByteIOContext ctx;

  1168.     uint8_t *cmov_data;

  1169.     uint8_t *moov_data; /* uncompressed data */

  1170.     long cmov_len, moov_len;

  1171.     int ret;

  1172. 

  1173.     get_be32(pb); /* dcom atom */

  1174.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1175.         return -1;

  1176.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1177.         av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");

  1178.         return -1;

  1179.     }

  1180.     get_be32(pb); /* cmvd atom */

  1181.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1182.         return -1;

  1183.     moov_len = get_be32(pb); /* uncompressed size */

  1184.     cmov_len = atom.size - 6 * 4;

  1185. 

  1186.     cmov_data = av_malloc(cmov_len);

  1187.     if (!cmov_data)

  1188.         return -1;

  1189.     moov_data = av_malloc(moov_len);

  1190.     if (!moov_data) {

  1191.         av_free(cmov_data);

  1192.         return -1;

  1193.     }

  1194.     get_buffer(pb, cmov_data, cmov_len);

  1195.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1196.         return -1;

  1197.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)

  1198.         return -1;

  1199.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1200.     atom.offset = 0;

  1201.     atom.size = moov_len;

  1202. #ifdef DEBUG

  1203. //    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1204. #endif

  1205.     ret = mov_read_default(c, &ctx, atom);

  1206.     av_free(moov_data);

  1207.     av_free(cmov_data);

  1208.     return ret;

  1209. #else

  1210.     av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");

  1211.     return -1;

  1212. #endif

  1213. }

  1214. 

  1215. /* edit list atom */

  1216. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1217. {

  1218.     MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;

  1219.     int i, edit_count;

  1220. 

  1221.     get_byte(pb); /* version */

  1222.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1223.     edit_count= sc->edit_count = get_be32(pb);     /* entries */

  1224. 

  1225.     for(i=0; i<edit_count; i++){

  1226.         int time;

  1227.         get_be32(pb); /* Track duration */

  1228.         time = get_be32(pb); /* Media time */

  1229.         get_be32(pb); /* Media rate */

  1230.         if (time != 0)

  1231.             av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "

  1232.                    "a/v desync might occur, patch welcome\n");

  1233.     }

  1234.     dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);

  1235.     return 0;

  1236. }

  1237. 

  1238. static const MOVParseTableEntry mov_default_parse_table[] = {

  1239. /* mp4 atoms */

  1240. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1241. { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */

  1242. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1243. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1244. { MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },

  1245. { MKTAG( 'f', 'i', 'e', 'l' ), mov_read_extradata },

  1246. { MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },

  1247. { MKTAG( 'g', 'l', 'b', 'l' ), mov_read_glbl },

  1248. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1249. { MKTAG( 'j', 'p', '2', 'h' ), mov_read_extradata },

  1250. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1251. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1252. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1253. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1254. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1255. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1256. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1257. { MKTAG( 'a', 'l', 'a', 'c' ), mov_read_extradata }, /* alac specific atom */

  1258. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_glbl },

  1259. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1260. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1261. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1262. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1263. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1264. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1265. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1266. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1267. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1268. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_udta },

  1269. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },

  1270. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1271. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1272. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1273. { 0, NULL }

  1274. };

  1275. 

  1276. /* XXX: is it sufficient ? */

  1277. static int mov_probe(AVProbeData *p)

  1278. {

  1279.     unsigned int offset;

  1280.     uint32_t tag;

  1281.     int score = 0;

  1282. 

  1283.     /* check file header */

  1284.     offset = 0;

  1285.     for(;;) {

  1286.         /* ignore invalid offset */

  1287.         if ((offset + 8) > (unsigned int)p->buf_size)

  1288.             return score;

  1289.         tag = AV_RL32(p->buf + offset + 4);

  1290.         switch(tag) {

  1291.         /* check for obvious tags */

  1292.         case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */

  1293.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1294.         case MKTAG( 'm', 'd', 'a', 't' ):

  1295.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1296.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1297.             return AVPROBE_SCORE_MAX;

  1298.         /* those are more common words, so rate then a bit less */

  1299.         case MKTAG( 'e', 'd', 'i', 'w' ): /* xdcam files have reverted first tags */

  1300.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1301.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1302.         case MKTAG( 'j', 'u', 'n', 'k' ):

  1303.         case MKTAG( 'p', 'i', 'c', 't' ):

  1304.             return AVPROBE_SCORE_MAX - 5;

  1305.         case MKTAG( 'f', 't', 'y', 'p' ):

  1306.         case MKTAG( 's', 'k', 'i', 'p' ):

  1307.         case MKTAG( 'u', 'u', 'i', 'd' ):

  1308.             offset = AV_RB32(p->buf+offset) + offset;

  1309.             /* if we only find those cause probedata is too small at least rate them */

  1310.             score = AVPROBE_SCORE_MAX - 50;

  1311.             break;

  1312.         default:

  1313.             /* unrecognized tag */

  1314.             return score;

  1315.         }

  1316.     }

  1317.     return score;

  1318. }

  1319. 

  1320. static void mov_build_index(MOVContext *mov, AVStream *st)

  1321. {

  1322.     MOVStreamContext *sc = st->priv_data;

  1323.     offset_t current_offset;

  1324.     int64_t current_dts = 0;

  1325.     unsigned int stts_index = 0;

  1326.     unsigned int stsc_index = 0;

  1327.     unsigned int stss_index = 0;

  1328.     unsigned int i, j;

  1329. 

  1330.     if (sc->sample_sizes || st->codec->codec_type == CODEC_TYPE_VIDEO ||

  1331.         sc->audio_cid == -2) {

  1332.         unsigned int current_sample = 0;

  1333.         unsigned int stts_sample = 0;

  1334.         unsigned int keyframe, sample_size;

  1335.         unsigned int distance = 0;

  1336. 

  1337.         st->nb_frames = sc->sample_count;

  1338.         for (i = 0; i < sc->chunk_count; i++) {

  1339.             current_offset = sc->chunk_offsets[i];

  1340.             if (stsc_index + 1 < sc->sample_to_chunk_sz &&

  1341.                 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)

  1342.                 stsc_index++;

  1343.             for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {

  1344.                 if (current_sample >= sc->sample_count) {

  1345.                     av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");

  1346.                     goto out;

  1347.                 }

  1348.                 keyframe = !sc->keyframe_count || current_sample + 1 == sc->keyframes[stss_index];

  1349.                 if (keyframe) {

  1350.                     distance = 0;

  1351.                     if (stss_index + 1 < sc->keyframe_count)

  1352.                         stss_index++;

  1353.                 }

  1354.                 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];

  1355.                 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "

  1356.                         "size %d, distance %d, keyframe %d\n", st->index, current_sample,

  1357.                         current_offset, current_dts, sample_size, distance, keyframe);

  1358.                 if(sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id)

  1359.                     av_add_index_entry(st, current_offset, current_dts, sample_size, distance,

  1360.                                     keyframe ? AVINDEX_KEYFRAME : 0);

  1361.                 current_offset += sample_size;

  1362.                 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);

  1363.                 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;

  1364.                 distance++;

  1365.                 stts_sample++;

  1366.                 current_sample++;

  1367.                 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {

  1368.                     stts_sample = 0;

  1369.                     stts_index++;

  1370.                 }

  1371.             }

  1372.         }

  1373.     } else { /* read whole chunk */

  1374.         unsigned int chunk_samples, chunk_size, chunk_duration;

  1375.         unsigned int frames = 1;

  1376.         for (i = 0; i < sc->chunk_count; i++) {

  1377.             current_offset = sc->chunk_offsets[i];

  1378.             if (stsc_index + 1 < sc->sample_to_chunk_sz &&

  1379.                 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)

  1380.                 stsc_index++;

  1381.             chunk_samples = sc->sample_to_chunk[stsc_index].count;

  1382.             /* get chunk size, beware of alaw/ulaw/mace */

  1383.             if (sc->samples_per_frame > 0 &&

  1384.                 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {

  1385.                 if (sc->samples_per_frame < 1024)

  1386.                     chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;

  1387.                 else {

  1388.                     chunk_size = sc->bytes_per_frame;

  1389.                     frames = chunk_samples / sc->samples_per_frame;

  1390.                     chunk_samples = sc->samples_per_frame;

  1391.                 }

  1392.             } else if (sc->sample_size > 1 || st->codec->bits_per_sample == 8) {

  1393.                 chunk_size = chunk_samples * sc->sample_size;

  1394.             } else {

  1395.                 av_log(mov->fc, AV_LOG_ERROR, "could not determine chunk size, report problem\n");

  1396.                 goto out;

  1397.             }

  1398.             for (j = 0; j < frames; j++) {

  1399.             av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);

  1400.             /* get chunk duration */

  1401.             chunk_duration = 0;

  1402.             while (chunk_samples > 0) {

  1403.                 if (chunk_samples < sc->stts_data[stts_index].count) {

  1404.                     chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1405.                     sc->stts_data[stts_index].count -= chunk_samples;

  1406.                     break;

  1407.                 } else {

  1408.                     chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1409.                     chunk_samples -= sc->stts_data[stts_index].count;

  1410.                     if (stts_index + 1 < sc->stts_count)

  1411.                         stts_index++;

  1412.                 }

  1413.             }

  1414.             current_offset += sc->bytes_per_frame;

  1415.             dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", size %d, "

  1416.                     "duration %d\n", st->index, i, current_offset, current_dts, chunk_size, chunk_duration);

  1417.             assert(chunk_duration % sc->time_rate == 0);

  1418.             current_dts += chunk_duration / sc->time_rate;

  1419.             }

  1420.         }

  1421.     }

  1422.  out:

  1423.     /* adjust sample count to avindex entries */

  1424.     sc->sample_count = st->nb_index_entries;

  1425. }

  1426. 

  1427. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1428. {

  1429.     MOVContext *mov = s->priv_data;

  1430.     ByteIOContext *pb = s->pb;

  1431.     int i, err;

  1432.     MOV_atom_t atom = { 0, 0, 0 };

  1433. 

  1434.     mov->fc = s;

  1435. 

  1436.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1437.         atom.size = url_fsize(pb);

  1438.     else

  1439.         atom.size = INT64_MAX;

  1440. 

  1441.     /* check MOV header */

  1442.     err = mov_read_default(mov, pb, atom);

  1443.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1444.         av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",

  1445.                 err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1446.         return -1;

  1447.     }

  1448.     dprintf(mov->fc, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1449. 

  1450.     for(i=0; i<s->nb_streams; i++) {

  1451.         AVStream *st = s->streams[i];

  1452.         MOVStreamContext *sc = st->priv_data;

  1453.         /* sanity checks */

  1454.         if(!sc->stts_count || !sc->chunk_count || !sc->sample_to_chunk_sz ||

  1455.            (!sc->sample_size && !sc->sample_count)){

  1456.             av_log(s, AV_LOG_ERROR, "missing mandatory atoms, broken header\n");

  1457.             sc->sample_count = 0; //ignore track

  1458.             continue;

  1459.         }

  1460.         if(!sc->time_rate)

  1461.             sc->time_rate=1;

  1462.         if(!sc->time_scale)

  1463.             sc->time_scale= mov->time_scale;

  1464.         av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);

  1465. 

  1466.         if (st->codec->codec_type == CODEC_TYPE_AUDIO && sc->stts_count == 1)

  1467.             st->codec->frame_size = sc->stts_data[0].duration;

  1468. 

  1469.         if(st->duration != AV_NOPTS_VALUE){

  1470.             assert(st->duration % sc->time_rate == 0);

  1471.             st->duration /= sc->time_rate;

  1472.         }

  1473.         sc->ffindex = i;

  1474.         mov_build_index(mov, st);

  1475.     }

  1476. 

  1477.     for(i=0; i<s->nb_streams; i++) {

  1478.         MOVStreamContext *sc = s->streams[i]->priv_data;

  1479.         /* Do not need those anymore. */

  1480.         av_freep(&sc->chunk_offsets);

  1481.         av_freep(&sc->sample_to_chunk);

  1482.         av_freep(&sc->sample_sizes);

  1483.         av_freep(&sc->keyframes);

  1484.         av_freep(&sc->stts_data);

  1485.     }

  1486.     return 0;

  1487. }

  1488. 

  1489. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1490. {

  1491.     MOVContext *mov = s->priv_data;

  1492.     MOVStreamContext *sc = 0;

  1493.     AVIndexEntry *sample = 0;

  1494.     int64_t best_dts = INT64_MAX;

  1495.     int i;

  1496. 

  1497.     for (i = 0; i < s->nb_streams; i++) {

  1498.         AVStream *st = s->streams[i];

  1499.         MOVStreamContext *msc = st->priv_data;

  1500.         if (st->discard != AVDISCARD_ALL && msc->current_sample < msc->sample_count) {

  1501.             AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];

  1502.             int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,

  1503.                                      AV_TIME_BASE, msc->time_scale);

  1504.             dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);

  1505.             if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||

  1506.                 (!url_is_streamed(s->pb) &&

  1507.                  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||

  1508.                   (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))) {

  1509.                 sample = current_sample;

  1510.                 best_dts = dts;

  1511.                 sc = msc;

  1512.             }

  1513.         }

  1514.     }

  1515.     if (!sample)

  1516.         return -1;

  1517.     /* must be done just before reading, to avoid infinite loop on sample */

  1518.     sc->current_sample++;

  1519.     if (url_fseek(s->pb, sample->pos, SEEK_SET) != sample->pos) {

  1520.         av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",

  1521.                sc->ffindex, sample->pos);

  1522.         return -1;

  1523.     }

  1524.     av_get_packet(s->pb, pkt, sample->size);

  1525. #ifdef CONFIG_DV_DEMUXER

  1526.     if (mov->dv_demux && sc->dv_audio_container) {

  1527.         dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);

  1528.         av_free(pkt->data);

  1529.         pkt->size = 0;

  1530.         if (dv_get_packet(mov->dv_demux, pkt) < 0)

  1531.             return -1;

  1532.     }

  1533. #endif

  1534.     pkt->stream_index = sc->ffindex;

  1535.     pkt->dts = sample->timestamp;

  1536.     if (sc->ctts_data) {

  1537.         assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);

  1538.         pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;

  1539.         /* update ctts context */

  1540.         sc->sample_to_ctime_sample++;

  1541.         if (sc->sample_to_ctime_index < sc->ctts_count &&

  1542.             sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {

  1543.             sc->sample_to_ctime_index++;

  1544.             sc->sample_to_ctime_sample = 0;

  1545.         }

  1546.     } else {

  1547.         pkt->pts = pkt->dts;

  1548.     }

  1549.     pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;

  1550.     pkt->pos = sample->pos;

  1551.     dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",

  1552.             pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);

  1553.     return 0;

  1554. }

  1555. 

  1556. static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)

  1557. {

  1558.     MOVStreamContext *sc = st->priv_data;

  1559.     int sample, time_sample;

  1560.     int i;

  1561. 

  1562.     sample = av_index_search_timestamp(st, timestamp, flags);

  1563.     dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);

  1564.     if (sample < 0) /* not sure what to do */

  1565.         return -1;

  1566.     sc->current_sample = sample;

  1567.     dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);

  1568.     /* adjust ctts index */

  1569.     if (sc->ctts_data) {

  1570.         time_sample = 0;

  1571.         for (i = 0; i < sc->ctts_count; i++) {

  1572.             int next = time_sample + sc->ctts_data[i].count;

  1573.             if (next > sc->current_sample) {

  1574.                 sc->sample_to_ctime_index = i;

  1575.                 sc->sample_to_ctime_sample = sc->current_sample - time_sample;

  1576.                 break;

  1577.             }

  1578.             time_sample = next;

  1579.         }

  1580.     }

  1581.     return sample;

  1582. }

  1583. 

  1584. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)

  1585. {

  1586.     AVStream *st;

  1587.     int64_t seek_timestamp, timestamp;

  1588.     int sample;

  1589.     int i;

  1590. 

  1591.     if (stream_index >= s->nb_streams)

  1592.         return -1;

  1593. 

  1594.     st = s->streams[stream_index];

  1595.     sample = mov_seek_stream(st, sample_time, flags);

  1596.     if (sample < 0)

  1597.         return -1;

  1598. 

  1599.     /* adjust seek timestamp to found sample timestamp */

  1600.     seek_timestamp = st->index_entries[sample].timestamp;

  1601. 

  1602.     for (i = 0; i < s->nb_streams; i++) {

  1603.         st = s->streams[i];

  1604.         if (stream_index == i || st->discard == AVDISCARD_ALL)

  1605.             continue;

  1606. 

  1607.         timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);

  1608.         mov_seek_stream(st, timestamp, flags);

  1609.     }

  1610.     return 0;

  1611. }

  1612. 

  1613. static int mov_read_close(AVFormatContext *s)

  1614. {

  1615.     int i;

  1616.     MOVContext *mov = s->priv_data;

  1617.     for(i=0; i<s->nb_streams; i++) {

  1618.         MOVStreamContext *sc = s->streams[i]->priv_data;

  1619.         av_freep(&sc->ctts_data);

  1620.     }

  1621.     if(mov->dv_demux){

  1622.         for(i=0; i<mov->dv_fctx->nb_streams; i++){

  1623.             av_freep(&mov->dv_fctx->streams[i]->codec);

  1624.             av_freep(&mov->dv_fctx->streams[i]);

  1625.         }

  1626.         av_freep(&mov->dv_fctx);

  1627.         av_freep(&mov->dv_demux);

  1628.     }

  1629.     return 0;

  1630. }

  1631. 

  1632. AVInputFormat mov_demuxer = {

  1633.     "mov,mp4,m4a,3gp,3g2,mj2",

  1634.     "QuickTime/MPEG4/Motion JPEG 2000 format",

  1635.     sizeof(MOVContext),

  1636.     mov_probe,

  1637.     mov_read_header,

  1638.     mov_read_packet,

  1639.     mov_read_close,

  1640.     mov_read_seek,

  1641. };