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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.  *   the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement.

  42.  *   FIXED, Francois Revol, 07/17/2002

  43.  * - ffmpeg has nearly none of the usual QuickTime codecs,

  44.  *   although I succesfully dumped raw and mp3 audio tracks off .mov files.

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

  46.  * - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes

  47.  *   (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at

  48.  *   http://mpeg.telecomitalialab.com/faq.htm

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

  50.  * - seek is not supported with files that contain edit list

  51.  *

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

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

  54.  *

  55.  * Reference documents:

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

  57.  * Apple:

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

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

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

  61.  */

  62. 

  63. #include "qtpalette.h"

  64. 

  65. 

  66. #undef NDEBUG

  67. #include <assert.h>

  68. 

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

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

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

  72.  */

  73. 

  74. typedef struct MOV_sample_to_chunk_tbl {

  75.     int first;

  76.     int count;

  77.     int id;

  78. } MOV_sample_to_chunk_tbl;

  79. 

  80. typedef struct {

  81.     uint32_t type;

  82.     int64_t offset;

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

  84. } MOV_atom_t;

  85. 

  86. typedef struct MOV_mdat_atom_s {

  87.     offset_t offset;

  88.     int64_t size;

  89. } MOV_mdat_atom_t;

  90. 

  91. struct MOVParseTableEntry;

  92. 

  93. typedef struct MOVStreamContext {

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

  95.     int next_chunk;

  96.     unsigned int chunk_count;

  97.     int64_t *chunk_offsets;

  98.     unsigned int stts_count;

  99.     Time2Sample *stts_data;

  100.     unsigned int ctts_count;

  101.     Time2Sample *ctts_data;

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

  103.     unsigned int sample_to_chunk_sz;

  104.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  105.     int sample_to_ctime_index;

  106.     int sample_to_ctime_sample;

  107.     unsigned int sample_size;

  108.     unsigned int sample_count;

  109.     int *sample_sizes;

  110.     unsigned int keyframe_count;

  111.     int *keyframes;

  112.     int time_scale;

  113.     int time_rate;

  114.     int current_sample;

  115.     unsigned int bytes_per_frame;

  116.     unsigned int samples_per_frame;

  117.     int dv_audio_container;

  118. } MOVStreamContext;

  119. 

  120. typedef struct MOVContext {

  121.     AVFormatContext *fc;

  122.     int time_scale;

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

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

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

  126.     int64_t mdat_offset;

  127.     int total_streams;

  128.     MOVStreamContext *streams[MAX_STREAMS];

  129. 

  130.     const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */

  131.     /* NOTE: for recursion save to/ restore from local variable! */

  132. 

  133.     AVPaletteControl palette_control;

  134.     MOV_mdat_atom_t *mdat_list;

  135.     int mdat_count;

  136.     DVDemuxContext *dv_demux;

  137.     AVFormatContext *dv_fctx;

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

  139. } MOVContext;

  140. 

  141. 

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

  143. 

  144. /* those functions parse an atom */

  145. /* return code:

  146.  1: found what I wanted, exit

  147.  0: continue to parse next atom

  148.  -1: error occured, exit

  149.  */

  150. typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);

  151. 

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

  153. typedef struct MOVParseTableEntry {

  154.     uint32_t type;

  155.     mov_parse_function func;

  156. } MOVParseTableEntry;

  157. 

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

  159. {

  160.     int64_t total_size = 0;

  161.     MOV_atom_t a;

  162.     int i;

  163.     int err = 0;

  164. 

  165.     a.offset = atom.offset;

  166. 

  167.     if (atom.size < 0)

  168.         atom.size = INT64_MAX;

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

  170.         a.size = atom.size;

  171.         a.type=0L;

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

  173.             a.size = get_be32(pb);

  174.             a.type = get_le32(pb);

  175.         }

  176.         total_size += 8;

  177.         a.offset += 8;

  178.         dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n", a.type, (char*)&a.type, a.size, atom.size, total_size);

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

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

  181.             a.offset += 8;

  182.             total_size += 8;

  183.         }

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

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

  186.             if (a.size <= 8)

  187.                 break;

  188.         }

  189.         a.size -= 8;

  190.         if(a.size < 0 || a.size > atom.size - total_size)

  191.             break;

  192. 

  193.         for (i = 0; c->parse_table[i].type != 0L

  194.              && c->parse_table[i].type != a.type; i++)

  195.             /* empty */;

  196. 

  197.         if (c->parse_table[i].type == 0) { /* skip leaf atoms data */

  198.             url_fskip(pb, a.size);

  199.         } else {

  200.             offset_t start_pos = url_ftell(pb);

  201.             int64_t left;

  202.             err = (c->parse_table[i].func)(c, pb, a);

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

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

  205.                 url_fskip(pb, left);

  206.         }

  207. 

  208.         a.offset += a.size;

  209.         total_size += a.size;

  210.     }

  211. 

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

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

  214.     }

  215. 

  216.     return err;

  217. }

  218. 

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

  220. {

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

  222.     uint32_t type;

  223.     uint32_t ctype;

  224. 

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

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

  227. 

  228.     /* component type */

  229.     ctype = get_le32(pb);

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

  231. 

  232.     dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);

  233.     dprintf(c->fc, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);

  234.     if(!ctype)

  235.         c->isom = 1;

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

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

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

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

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

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

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

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

  244.         st->codec->codec_id = CODEC_ID_DVD_SUBTITLE;

  245.     }

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

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

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

  249. 

  250.     if(atom.size <= 24)

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

  252. 

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

  254.     return 0;

  255. }

  256. 

  257. static int mp4_read_descr_len(ByteIOContext *pb)

  258. {

  259.     int len = 0;

  260.     int count = 4;

  261.     while (count--) {

  262.         int c = get_byte(pb);

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

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

  265.             break;

  266.     }

  267.     return len;

  268. }

  269. 

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

  271. {

  272.     int len;

  273.     *tag = get_byte(pb);

  274.     len = mp4_read_descr_len(pb);

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

  276.     return len;

  277. }

  278. 

  279. #define MP4ESDescrTag                   0x03

  280. #define MP4DecConfigDescrTag            0x04

  281. #define MP4DecSpecificDescrTag          0x05

  282. 

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

  284. {

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

  286.     int tag, len;

  287. 

  288.     /* Well, broken but suffisant for some MP4 streams */

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

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

  291.     if (tag == MP4ESDescrTag) {

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

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

  294.     } else

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

  296. 

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

  298.     if (tag == MP4DecConfigDescrTag) {

  299.         int object_type_id = get_byte(pb);

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

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

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

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

  304. 

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

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

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

  308.         if (tag == MP4DecSpecificDescrTag) {

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

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

  311.             if (st->codec->extradata) {

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

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

  314.                 /* from mplayer */

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

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

  317.                 }

  318.             }

  319.         }

  320.     }

  321.     return 0;

  322. }

  323. 

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

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

  326. {

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

  328.         return 0;

  329.     c->mdat_list = av_realloc(c->mdat_list, (c->mdat_count + 1) * sizeof(*c->mdat_list));

  330.     c->mdat_list[c->mdat_count].offset = atom.offset;

  331.     c->mdat_list[c->mdat_count].size = atom.size;

  332.     c->mdat_count++;

  333.     c->found_mdat=1;

  334.     c->mdat_offset = atom.offset;

  335.     if(c->found_moov)

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

  337.     url_fskip(pb, atom.size);

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

  339. }

  340. 

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

  342. {

  343.     uint32_t type = get_le32(pb);

  344. 

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

  346.         c->isom = 1;

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

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

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

  350.     return 0;

  351. }

  352. 

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

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

  355. {

  356.     int err;

  357. 

  358.     err = mov_read_default(c, pb, atom);

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

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

  361.     c->found_moov=1;

  362.     if(c->found_mdat)

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

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

  365. }

  366. 

  367. 

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

  369. {

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

  371.     MOVStreamContext *sc = st->priv_data;

  372.     int version = get_byte(pb);

  373.     int lang;

  374. 

  375.     if (version > 1)

  376.         return 1; /* unsupported */

  377. 

  378.     get_byte(pb); get_byte(pb);

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

  380. 

  381.     if (version == 1) {

  382.         get_be64(pb);

  383.         get_be64(pb);

  384.     } else {

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

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

  387.     }

  388. 

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

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

  391. 

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

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

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

  395. 

  396.     return 0;

  397. }

  398. 

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

  400. {

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

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

  403. 

  404.     if (version == 1) {

  405.         get_be64(pb);

  406.         get_be64(pb);

  407.     } else {

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

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

  410.     }

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

  412. #ifdef DEBUG

  413.     av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);

  414. #endif

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

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

  417. 

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

  419. 

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

  421. 

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

  423. 

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

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

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

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

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

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

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

  431. 

  432.     return 0;

  433. }

  434. 

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

  436. {

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

  438. 

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

  440.         return -1;

  441. 

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

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

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

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

  446.     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  447. 

  448.     if (st->codec->extradata) {

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

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

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

  452.     } else

  453.         url_fskip(pb, atom.size);

  454. 

  455.     return 0;

  456. }

  457. 

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

  459. {

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

  461.     int little_endian = get_be16(pb);

  462. 

  463.     if (little_endian) {

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

  465.         case CODEC_ID_PCM_S24BE:

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

  467.             break;

  468.         case CODEC_ID_PCM_S32BE:

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

  470.             break;

  471.         default:

  472.             break;

  473.         }

  474.     }

  475.     return 0;

  476. }

  477. 

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

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

  480. {

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

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

  483.         return -1;

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

  485.     st->codec->extradata_size = atom.size + 8;

  486.     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  487.     if (st->codec->extradata) {

  488.         AV_WL32(st->codec->extradata + 4, atom.type);

  489.         get_buffer(pb, st->codec->extradata + 8, atom.size);

  490.     } else

  491.         url_fskip(pb, atom.size);

  492.     return 0;

  493. }

  494. 

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

  496. {

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

  498. 

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

  500.         return -1;

  501. 

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

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

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

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

  506.         st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  507. 

  508.         if (st->codec->extradata) {

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

  510.         } else

  511.             url_fskip(pb, atom.size);

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

  513.         mov_read_default(c, pb, atom);

  514.     } else

  515.         url_fskip(pb, atom.size);

  516.     return 0;

  517. }

  518. 

  519. static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  520. {

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

  522. 

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

  524.         return -1;

  525. 

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

  527. 

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

  529.     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  530. 

  531.     if (st->codec->extradata) {

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

  533.     } else

  534.         url_fskip(pb, atom.size);

  535. 

  536.     return 0;

  537. }

  538. 

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

  540. {

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

  542.     MOVStreamContext *sc = st->priv_data;

  543.     unsigned int i, entries;

  544. 

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

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

  547. 

  548.     entries = get_be32(pb);

  549. 

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

  551.         return -1;

  552. 

  553.     sc->chunk_count = entries;

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

  555.     if (!sc->chunk_offsets)

  556.         return -1;

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

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

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

  560.         }

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

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

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

  564.         }

  565.     } else

  566.         return -1;

  567. 

  568.     return 0;

  569. }

  570. 

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

  572. {

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

  574.     MOVStreamContext *sc = st->priv_data;

  575.     int entries, frames_per_sample;

  576.     uint32_t format;

  577.     uint8_t codec_name[32];

  578. 

  579.     /* for palette traversal */

  580.     int color_depth;

  581.     int color_start;

  582.     int color_count;

  583.     int color_end;

  584.     int color_index;

  585.     int color_dec;

  586.     int color_greyscale;

  587.     unsigned char *color_table;

  588.     int j;

  589.     unsigned char r, g, b;

  590. 

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

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

  593. 

  594.     entries = get_be32(pb);

  595. 

  596.     while(entries--) { //Parsing Sample description table

  597.         enum CodecID id;

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

  599.         offset_t start_pos = url_ftell(pb);

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

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

  602. 

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

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

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

  606. 

  607.         if (st->codec->codec_tag) {

  608.             /* multiple fourcc, just skip for now */

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

  610.             continue;

  611.         }

  612. 

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

  614.         id = codec_get_id(codec_movaudio_tags, format);

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

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

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

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

  619.             id = codec_get_id(codec_movvideo_tags, format);

  620.             if (id <= 0)

  621.                 id = codec_get_id(codec_bmp_tags, format);

  622.             if (id > 0)

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

  624.         }

  625. 

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

  627.                 size,

  628.                 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff, (format >> 24) & 0xff,

  629.                 st->codec->codec_type);

  630. 

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

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

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

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

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

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

  637.             get_be32(pb); /* spacial quality */

  638. 

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

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

  641. 

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

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

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

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

  646. #ifdef DEBUG

  647.             av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);

  648. #endif

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

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

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

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

  653.             }

  654. 

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

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

  657. 

  658.             /* figure out the palette situation */

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

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

  661. 

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

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

  664.                 (color_depth == 8)) {

  665. 

  666.                 if (color_greyscale) {

  667. 

  668.                     /* compute the greyscale palette */

  669.                     color_count = 1 << color_depth;

  670.                     color_index = 255;

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

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

  673.                         r = g = b = color_index;

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

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

  676.                         color_index -= color_dec;

  677.                         if (color_index < 0)

  678.                             color_index = 0;

  679.                     }

  680. 

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

  682. 

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

  684.                     color_count = 1 << color_depth;

  685.                     if (color_depth == 2)

  686.                         color_table = ff_qt_default_palette_4;

  687.                     else if (color_depth == 4)

  688.                         color_table = ff_qt_default_palette_16;

  689.                     else

  690.                         color_table = ff_qt_default_palette_256;

  691. 

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

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

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

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

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

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

  698.                     }

  699. 

  700.                 } else {

  701. 

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

  703.                     color_start = get_be32(pb);

  704.                     color_count = get_be16(pb);

  705.                     color_end = get_be16(pb);

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

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

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

  709.                          * up front */

  710.                         get_byte(pb);

  711.                         get_byte(pb);

  712.                         r = get_byte(pb);

  713.                         get_byte(pb);

  714.                         g = get_byte(pb);

  715.                         get_byte(pb);

  716.                         b = get_byte(pb);

  717.                         get_byte(pb);

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

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

  720.                     }

  721.                 }

  722. 

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

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

  725.             } else

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

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

  728.             int bits_per_sample;

  729.             uint16_t version = get_be16(pb);

  730. 

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

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

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

  734. 

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

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

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

  738.             /* do we need to force to 16 for AMR ? */

  739. 

  740.             /* handle specific s8 codec */

  741.             get_be16(pb); /* compression id = 0*/

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

  743. 

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

  745. 

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

  747.             case CODEC_ID_PCM_S8:

  748.             case CODEC_ID_PCM_U8:

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

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

  751.                 break;

  752.             case CODEC_ID_PCM_S16LE:

  753.             case CODEC_ID_PCM_S16BE:

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

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

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

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

  758.                 break;

  759.             default:

  760.                 break;

  761.             }

  762. 

  763.             //Read QT version 1 fields. In version 0 theese dont exist

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

  765.             if(!c->isom) {

  766.                 if(version==1) {

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

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

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

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

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

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

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

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

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

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

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

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

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

  780.                 }

  781.             }

  782. 

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

  784.             if (bits_per_sample) {

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

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

  787.             }

  788.         } else {

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

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

  791.         }

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

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

  794.         if (a.size > 8)

  795.             mov_read_default(c, pb, a);

  796.         else if (a.size > 0)

  797.             url_fskip(pb, a.size);

  798.     }

  799. 

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

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

  802.     }

  803. 

  804.     /* special codec parameters handling */

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

  806. #ifdef CONFIG_H261_DECODER

  807.     case CODEC_ID_H261:

  808. #endif

  809. #ifdef CONFIG_H263_DECODER

  810.     case CODEC_ID_H263:

  811. #endif

  812. #ifdef CONFIG_MPEG4_DECODER

  813.     case CODEC_ID_MPEG4:

  814. #endif

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

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

  817.         break;

  818. #ifdef CONFIG_LIBFAAD

  819.     case CODEC_ID_AAC:

  820. #endif

  821. #ifdef CONFIG_VORBIS_DECODER

  822.     case CODEC_ID_VORBIS:

  823. #endif

  824.     case CODEC_ID_MP3ON4:

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

  826.         break;

  827. #ifdef CONFIG_DV_DEMUXER

  828.     case CODEC_ID_DVAUDIO:

  829.         c->dv_fctx = av_alloc_format_context();

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

  831.         if (!c->dv_demux) {

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

  833.             return -1;

  834.         }

  835.         sc->dv_audio_container = 1;

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

  837.         break;

  838. #endif

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

  840.     case CODEC_ID_AMR_WB:

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

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

  843.         break;

  844.     case CODEC_ID_AMR_NB:

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

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

  847.         break;

  848.     case CODEC_ID_MP2:

  849.     case CODEC_ID_MP3:

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

  851.         st->need_parsing = AVSTREAM_PARSE_FULL;

  852.         break;

  853.     default:

  854.         break;

  855.     }

  856. 

  857.     return 0;

  858. }

  859. 

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

  861. {

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

  863.     MOVStreamContext *sc = st->priv_data;

  864.     unsigned int i, entries;

  865. 

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

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

  868. 

  869.     entries = get_be32(pb);

  870. 

  871.     if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))

  872.         return -1;

  873. 

  874. #ifdef DEBUG

  875. av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  876. #endif

  877.     sc->sample_to_chunk_sz = entries;

  878.     sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  879.     if (!sc->sample_to_chunk)

  880.         return -1;

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

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

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

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

  885.     }

  886.     return 0;

  887. }

  888. 

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

  890. {

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

  892.     MOVStreamContext *sc = st->priv_data;

  893.     unsigned int i, entries;

  894. 

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

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

  897. 

  898.     entries = get_be32(pb);

  899. 

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

  901.         return -1;

  902. 

  903.     sc->keyframe_count = entries;

  904. #ifdef DEBUG

  905.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %d\n", sc->keyframe_count);

  906. #endif

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

  908.     if (!sc->keyframes)

  909.         return -1;

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

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

  912. #ifdef DEBUG

  913. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%d\n", sc->keyframes[i]); */

  914. #endif

  915.     }

  916.     return 0;

  917. }

  918. 

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

  920. {

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

  922.     MOVStreamContext *sc = st->priv_data;

  923.     unsigned int i, entries, sample_size;

  924. 

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

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

  927. 

  928.     sample_size = get_be32(pb);

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

  930.         sc->sample_size = sample_size;

  931.     entries = get_be32(pb);

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

  933.         return -1;

  934. 

  935.     sc->sample_count = entries;

  936.     if (sample_size)

  937.         return 0;

  938. 

  939. #ifdef DEBUG

  940.     av_log(NULL, AV_LOG_DEBUG, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);

  941. #endif

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

  943.     if (!sc->sample_sizes)

  944.         return -1;

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

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

  947. #ifdef DEBUG

  948.         av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%d\n", sc->sample_sizes[i]);

  949. #endif

  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(Time2Sample))

  966.         return -1;

  967. 

  968.     sc->stts_count = entries;

  969.     sc->stts_data = av_malloc(entries * sizeof(Time2Sample));

  970. 

  971. #ifdef DEBUG

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

  973. #endif

  974. 

  975.     sc->time_rate=0;

  976. 

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

  978.         int sample_duration;

  979.         int sample_count;

  980. 

  981.         sample_count=get_be32(pb);

  982.         sample_duration = get_be32(pb);

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

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

  985. 

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

  987. 

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

  989. 

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

  991.         total_sample_count+=sample_count;

  992.     }

  993. 

  994.     st->nb_frames= total_sample_count;

  995.     if(duration)

  996.         st->duration= duration;

  997.     return 0;

  998. }

  999. 

  1000. static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1001. {

  1002.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1003.     MOVStreamContext *sc = st->priv_data;

  1004.     unsigned int i, entries;

  1005. 

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

  1007.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1008.     entries = get_be32(pb);

  1009.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1010.         return -1;

  1011. 

  1012.     sc->ctts_count = entries;

  1013.     sc->ctts_data = av_malloc(entries * sizeof(Time2Sample));

  1014. 

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

  1052. 

  1053.     return mov_read_default(c, pb, atom);

  1054. }

  1055. 

  1056. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1057. {

  1058.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1059.     int version = get_byte(pb);

  1060. 

  1061.     get_byte(pb); get_byte(pb);

  1062.     get_byte(pb); /* flags */

  1063.     /*

  1064.     MOV_TRACK_ENABLED 0x0001

  1065.     MOV_TRACK_IN_MOVIE 0x0002

  1066.     MOV_TRACK_IN_PREVIEW 0x0004

  1067.     MOV_TRACK_IN_POSTER 0x0008

  1068.     */

  1069. 

  1070.     if (version == 1) {

  1071.         get_be64(pb);

  1072.         get_be64(pb);

  1073.     } else {

  1074.         get_be32(pb); /* creation time */

  1075.         get_be32(pb); /* modification time */

  1076.     }

  1077.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1078.     get_be32(pb); /* reserved */

  1079.     st->start_time = 0; /* check */

  1080.     (version == 1) ? get_be64(pb) : get_be32(pb); /* highlevel (considering edits) duration in movie timebase */

  1081.     get_be32(pb); /* reserved */

  1082.     get_be32(pb); /* reserved */

  1083. 

  1084.     get_be16(pb); /* layer */

  1085.     get_be16(pb); /* alternate group */

  1086.     get_be16(pb); /* volume */

  1087.     get_be16(pb); /* reserved */

  1088. 

  1089.     url_fskip(pb, 36); /* display matrix */

  1090. 

  1091.     /* those are fixed-point */

  1092.     get_be32(pb); /* track width */

  1093.     get_be32(pb); /* track height */

  1094. 

  1095.     return 0;

  1096. }

  1097. 

  1098. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1099. /* like the files created with Adobe Premiere 5.0, for samples see */

  1100. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1101. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1102. {

  1103.     int err;

  1104. 

  1105.     if (atom.size < 8)

  1106.         return 0; /* continue */

  1107.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1108.         url_fskip(pb, atom.size - 4);

  1109.         return 0;

  1110.     }

  1111.     atom.type = get_le32(pb);

  1112.     atom.offset += 8;

  1113.     atom.size -= 8;

  1114.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1115.         url_fskip(pb, atom.size);

  1116.         return 0;

  1117.     }

  1118.     err = mov_read_mdat(c, pb, atom);

  1119.     return err;

  1120. }

  1121. 

  1122. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1123. {

  1124. #ifdef CONFIG_ZLIB

  1125.     ByteIOContext ctx;

  1126.     uint8_t *cmov_data;

  1127.     uint8_t *moov_data; /* uncompressed data */

  1128.     long cmov_len, moov_len;

  1129.     int ret;

  1130. 

  1131.     get_be32(pb); /* dcom atom */

  1132.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1133.         return -1;

  1134.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1135.         av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");

  1136.         return -1;

  1137.     }

  1138.     get_be32(pb); /* cmvd atom */

  1139.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1140.         return -1;

  1141.     moov_len = get_be32(pb); /* uncompressed size */

  1142.     cmov_len = atom.size - 6 * 4;

  1143. 

  1144.     cmov_data = av_malloc(cmov_len);

  1145.     if (!cmov_data)

  1146.         return -1;

  1147.     moov_data = av_malloc(moov_len);

  1148.     if (!moov_data) {

  1149.         av_free(cmov_data);

  1150.         return -1;

  1151.     }

  1152.     get_buffer(pb, cmov_data, cmov_len);

  1153.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1154.         return -1;

  1155.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)

  1156.         return -1;

  1157.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1158.     atom.offset = 0;

  1159.     atom.size = moov_len;

  1160. #ifdef DEBUG

  1161. //    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1162. #endif

  1163.     ret = mov_read_default(c, &ctx, atom);

  1164.     av_free(moov_data);

  1165.     av_free(cmov_data);

  1166.     return ret;

  1167. #else

  1168.     av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");

  1169.     return -1;

  1170. #endif

  1171. }

  1172. 

  1173. /* edit list atom */

  1174. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1175. {

  1176.     int i, edit_count;

  1177. 

  1178.     get_byte(pb); /* version */

  1179.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1180.     edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */

  1181. 

  1182.     for(i=0; i<edit_count; i++){

  1183.         get_be32(pb); /* Track duration */

  1184.         get_be32(pb); /* Media time */

  1185.         get_be32(pb); /* Media rate */

  1186.     }

  1187.     dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count);

  1188.     return 0;

  1189. }

  1190. 

  1191. static const MOVParseTableEntry mov_default_parse_table[] = {

  1192. /* mp4 atoms */

  1193. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1194. { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */

  1195. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1196. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1197. { MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },

  1198. { MKTAG( 'f', 'i', 'e', 'l' ), mov_read_extradata },

  1199. { MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },

  1200. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1201. { MKTAG( 'j', 'p', '2', 'h' ), mov_read_extradata },

  1202. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1203. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1204. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1205. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1206. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1207. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1208. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1209. { MKTAG( 'a', 'l', 'a', 'c' ), mov_read_extradata }, /* alac specific atom */

  1210. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },

  1211. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1212. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1213. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1214. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1215. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1216. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1217. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1218. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1219. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1220. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },

  1221. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1222. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1223. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1224. { 0L, NULL }

  1225. };

  1226. 

  1227. static void mov_free_stream_context(MOVStreamContext *sc)

  1228. {

  1229.     if(sc) {

  1230.         av_freep(&sc->ctts_data);

  1231.         av_freep(&sc);

  1232.     }

  1233. }

  1234. 

  1235. /* XXX: is it sufficient ? */

  1236. static int mov_probe(AVProbeData *p)

  1237. {

  1238.     unsigned int offset;

  1239.     uint32_t tag;

  1240.     int score = 0;

  1241. 

  1242.     /* check file header */

  1243.     offset = 0;

  1244.     for(;;) {

  1245.         /* ignore invalid offset */

  1246.         if ((offset + 8) > (unsigned int)p->buf_size)

  1247.             return score;

  1248.         tag = AV_RL32(p->buf + offset + 4);

  1249.         switch(tag) {

  1250.         /* check for obvious tags */

  1251.         case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */

  1252.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1253.         case MKTAG( 'm', 'd', 'a', 't' ):

  1254.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1255.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1256.             return AVPROBE_SCORE_MAX;

  1257.         /* those are more common words, so rate then a bit less */

  1258.         case MKTAG( 'e', 'd', 'i', 'w' ): /* xdcam files have reverted first tags */

  1259.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1260.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1261.         case MKTAG( 'j', 'u', 'n', 'k' ):

  1262.         case MKTAG( 'p', 'i', 'c', 't' ):

  1263.             return AVPROBE_SCORE_MAX - 5;

  1264.         case MKTAG( 'f', 't', 'y', 'p' ):

  1265.         case MKTAG( 's', 'k', 'i', 'p' ):

  1266.         case MKTAG( 'u', 'u', 'i', 'd' ):

  1267.             offset = AV_RB32(p->buf+offset) + offset;

  1268.             /* if we only find those cause probedata is too small at least rate them */

  1269.             score = AVPROBE_SCORE_MAX - 50;

  1270.             break;

  1271.         default:

  1272.             /* unrecognized tag */

  1273.             return score;

  1274.         }

  1275.     }

  1276.     return score;

  1277. }

  1278. 

  1279. static void mov_build_index(MOVContext *mov, AVStream *st)

  1280. {

  1281.     MOVStreamContext *sc = st->priv_data;

  1282.     offset_t current_offset;

  1283.     int64_t current_dts = 0;

  1284.     unsigned int stts_index = 0;

  1285.     unsigned int stsc_index = 0;

  1286.     unsigned int stss_index = 0;

  1287.     unsigned int i, j, k;

  1288. 

  1289.     if (sc->sample_sizes || st->codec->codec_type == CODEC_TYPE_VIDEO || sc->dv_audio_container) {

  1290.         unsigned int current_sample = 0;

  1291.         unsigned int stts_sample = 0;

  1292.         unsigned int keyframe, sample_size;

  1293.         unsigned int distance = 0;

  1294. 

  1295.         st->nb_frames = sc->sample_count;

  1296.         for (i = 0; i < sc->chunk_count; i++) {

  1297.             current_offset = sc->chunk_offsets[i];

  1298.             if (stsc_index + 1 < sc->sample_to_chunk_sz && i + 1 == sc->sample_to_chunk[stsc_index + 1].first)

  1299.                 stsc_index++;

  1300.             for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {

  1301.                 if (current_sample >= sc->sample_count) {

  1302.                     av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");

  1303.                     goto out;

  1304.                 }

  1305.                 keyframe = !sc->keyframe_count || current_sample + 1 == sc->keyframes[stss_index];

  1306.                 if (keyframe) {

  1307.                     distance = 0;

  1308.                     if (stss_index + 1 < sc->keyframe_count)

  1309.                         stss_index++;

  1310.                 }

  1311.                 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];

  1312.                 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", size %d, distance %d, keyframe %d\n",

  1313.                         st->index, current_sample, current_offset, current_dts, sample_size, distance, keyframe);

  1314.                 av_add_index_entry(st, current_offset, current_dts, sample_size, distance, keyframe ? AVINDEX_KEYFRAME : 0);

  1315.                 current_offset += sample_size;

  1316.                 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);

  1317.                 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;

  1318.                 distance++;

  1319.                 stts_sample++;

  1320.                 current_sample++;

  1321.                 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {

  1322.                     stts_sample = 0;

  1323.                     stts_index++;

  1324.                 }

  1325.             }

  1326.         }

  1327.     } else { /* read whole chunk */

  1328.         unsigned int chunk_samples, chunk_size, chunk_duration;

  1329. 

  1330.         for (i = 0; i < sc->chunk_count; i++) {

  1331.             current_offset = sc->chunk_offsets[i];

  1332.             if (stsc_index + 1 < sc->sample_to_chunk_sz && i + 1 == sc->sample_to_chunk[stsc_index + 1].first)

  1333.                 stsc_index++;

  1334.             chunk_samples = sc->sample_to_chunk[stsc_index].count;

  1335.             /* get chunk size */

  1336.             if (sc->sample_size > 1 || st->codec->codec_id == CODEC_ID_PCM_U8 || st->codec->codec_id == CODEC_ID_PCM_S8)

  1337.                 chunk_size = chunk_samples * sc->sample_size;

  1338.             else if (sc->samples_per_frame > 0 && (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0))

  1339.                 chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;

  1340.             else { /* workaround to find nearest next chunk offset */

  1341.                 chunk_size = INT_MAX;

  1342.                 for (j = 0; j < mov->total_streams; j++) {

  1343.                     MOVStreamContext *msc = mov->streams[j];

  1344. 

  1345.                     for (k = msc->next_chunk; k < msc->chunk_count; k++) {

  1346.                         if (msc->chunk_offsets[k] > current_offset && msc->chunk_offsets[k] - current_offset < chunk_size) {

  1347.                             chunk_size = msc->chunk_offsets[k] - current_offset;

  1348.                             msc->next_chunk = k;

  1349.                             break;

  1350.                         }

  1351.                     }

  1352.                 }

  1353.                 /* check for last chunk */

  1354.                 if (chunk_size == INT_MAX)

  1355.                     for (j = 0; j < mov->mdat_count; j++) {

  1356.                         dprintf(mov->fc, "mdat %d, offset %"PRIx64", size %"PRId64", current offset %"PRIx64"\n",

  1357.                                 j, mov->mdat_list[j].offset, mov->mdat_list[j].size, current_offset);

  1358.                         if (mov->mdat_list[j].offset <= current_offset && mov->mdat_list[j].offset + mov->mdat_list[j].size > current_offset)

  1359.                             chunk_size = mov->mdat_list[j].offset + mov->mdat_list[j].size - current_offset;

  1360.                     }

  1361.                 assert(chunk_size != INT_MAX);

  1362.                 for (j = 0; j < mov->total_streams; j++) {

  1363.                     mov->streams[j]->next_chunk = 0;

  1364.                 }

  1365.             }

  1366.             av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);

  1367.             /* get chunk duration */

  1368.             chunk_duration = 0;

  1369.             while (chunk_samples > 0) {

  1370.                 if (chunk_samples < sc->stts_data[stts_index].count) {

  1371.                     chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1372.                     sc->stts_data[stts_index].count -= chunk_samples;

  1373.                     break;

  1374.                 } else {

  1375.                     chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1376.                     chunk_samples -= sc->stts_data[stts_index].count;

  1377.                     if (stts_index + 1 < sc->stts_count) {

  1378.                         stts_index++;

  1379.                     }

  1380.                 }

  1381.             }

  1382.             dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", size %d, duration %d\n",

  1383.                     st->index, i, current_offset, current_dts, chunk_size, chunk_duration);

  1384.             assert(chunk_duration % sc->time_rate == 0);

  1385.             current_dts += chunk_duration / sc->time_rate;

  1386.         }

  1387.     }

  1388.  out:

  1389.     /* adjust sample count to avindex entries */

  1390.     sc->sample_count = st->nb_index_entries;

  1391. }

  1392. 

  1393. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1394. {

  1395.     MOVContext *mov = s->priv_data;

  1396.     ByteIOContext *pb = &s->pb;

  1397.     int i, err;

  1398.     MOV_atom_t atom = { 0, 0, 0 };

  1399. 

  1400.     mov->fc = s;

  1401.     mov->parse_table = mov_default_parse_table;

  1402. 

  1403.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1404.         atom.size = url_fsize(pb);

  1405.     else

  1406.         atom.size = INT64_MAX;

  1407. 

  1408.     /* check MOV header */

  1409.     err = mov_read_default(mov, pb, atom);

  1410.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1411.         av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",

  1412.                 err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1413.         return -1;

  1414.     }

  1415.     dprintf(mov->fc, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1416. 

  1417.     /* some cleanup : make sure we are on the mdat atom */

  1418.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1419.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1420. 

  1421.     mov->total_streams = s->nb_streams;

  1422. 

  1423.     for(i=0; i<mov->total_streams; i++) {

  1424.         MOVStreamContext *sc = mov->streams[i];

  1425.         AVStream *st = s->streams[i];

  1426.         /* sanity checks */

  1427.         if(!sc->stts_count || !sc->chunk_count || !sc->sample_to_chunk_sz ||

  1428.            (!sc->sample_size && !sc->sample_count)){

  1429.             av_log(s, AV_LOG_ERROR, "missing mandatory atoms, broken header\n");

  1430.             sc->sample_count = 0; //ignore track

  1431.             continue;

  1432.         }

  1433.         if(!sc->time_rate)

  1434.             sc->time_rate=1;

  1435.         if(!sc->time_scale)

  1436.             sc->time_scale= mov->time_scale;

  1437.         av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);

  1438. 

  1439.         if (st->codec->codec_type == CODEC_TYPE_AUDIO && sc->stts_count == 1)

  1440.             st->codec->frame_size = sc->stts_data[0].duration;

  1441. 

  1442.         if(st->duration != AV_NOPTS_VALUE){

  1443.             assert(st->duration % sc->time_rate == 0);

  1444.             st->duration /= sc->time_rate;

  1445.         }

  1446.         sc->ffindex = i;

  1447.         mov_build_index(mov, st);

  1448.     }

  1449. 

  1450.     for(i=0; i<mov->total_streams; i++) {

  1451.         /* dont need those anymore */

  1452.         av_freep(&mov->streams[i]->chunk_offsets);

  1453.         av_freep(&mov->streams[i]->sample_to_chunk);

  1454.         av_freep(&mov->streams[i]->sample_sizes);

  1455.         av_freep(&mov->streams[i]->keyframes);

  1456.         av_freep(&mov->streams[i]->stts_data);

  1457.     }

  1458.     av_freep(&mov->mdat_list);

  1459.     return 0;

  1460. }

  1461. 

  1462. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1463. {

  1464.     MOVContext *mov = s->priv_data;

  1465.     MOVStreamContext *sc = 0;

  1466.     AVIndexEntry *sample = 0;

  1467.     int64_t best_dts = INT64_MAX;

  1468.     int i;

  1469. 

  1470.     for (i = 0; i < mov->total_streams; i++) {

  1471.         MOVStreamContext *msc = mov->streams[i];

  1472. 

  1473.         if (s->streams[i]->discard != AVDISCARD_ALL && msc->current_sample < msc->sample_count) {

  1474.             AVIndexEntry *current_sample = &s->streams[i]->index_entries[msc->current_sample];

  1475.             int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate, AV_TIME_BASE, msc->time_scale);

  1476. 

  1477.             dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);

  1478.             if (dts < best_dts) {

  1479.                 sample = current_sample;

  1480.                 best_dts = dts;

  1481.                 sc = msc;

  1482.             }

  1483.         }

  1484.     }

  1485.     if (!sample)

  1486.         return -1;

  1487.     /* must be done just before reading, to avoid infinite loop on sample */

  1488.     sc->current_sample++;

  1489.     if (sample->pos >= url_fsize(&s->pb)) {

  1490.         av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n", sc->ffindex, sample->pos);

  1491.         return -1;

  1492.     }

  1493. #ifdef CONFIG_DV_DEMUXER

  1494.     if (sc->dv_audio_container) {

  1495.         dv_get_packet(mov->dv_demux, pkt);

  1496.         dprintf(s, "dv audio pkt size %d\n", pkt->size);

  1497.     } else {

  1498. #endif

  1499.         url_fseek(&s->pb, sample->pos, SEEK_SET);

  1500.         av_get_packet(&s->pb, pkt, sample->size);

  1501. #ifdef CONFIG_DV_DEMUXER

  1502.         if (mov->dv_demux) {

  1503.             void *pkt_destruct_func = pkt->destruct;

  1504.             dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);

  1505.             pkt->destruct = pkt_destruct_func;

  1506.         }

  1507.     }

  1508. #endif

  1509.     pkt->stream_index = sc->ffindex;

  1510.     pkt->dts = sample->timestamp;

  1511.     if (sc->ctts_data) {

  1512.         assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);

  1513.         pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;

  1514.         /* update ctts context */

  1515.         sc->sample_to_ctime_sample++;

  1516.         if (sc->sample_to_ctime_index < sc->ctts_count && sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {

  1517.             sc->sample_to_ctime_index++;

  1518.             sc->sample_to_ctime_sample = 0;

  1519.         }

  1520.     } else {

  1521.         pkt->pts = pkt->dts;

  1522.     }

  1523.     pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;

  1524.     pkt->pos = sample->pos;

  1525.     dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n", pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);

  1526.     return 0;

  1527. }

  1528. 

  1529. static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)

  1530. {

  1531.     MOVStreamContext *sc = st->priv_data;

  1532.     int sample, time_sample;

  1533.     int i;

  1534. 

  1535.     sample = av_index_search_timestamp(st, timestamp, flags);

  1536.     dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);

  1537.     if (sample < 0) /* not sure what to do */

  1538.         return -1;

  1539.     sc->current_sample = sample;

  1540.     dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);

  1541.     /* adjust ctts index */

  1542.     if (sc->ctts_data) {

  1543.         time_sample = 0;

  1544.         for (i = 0; i < sc->ctts_count; i++) {

  1545.             time_sample += sc->ctts_data[i].count;

  1546.             if (time_sample >= sc->current_sample) {

  1547.                 sc->sample_to_ctime_index = i;

  1548.                 sc->sample_to_ctime_sample = time_sample - sc->current_sample;

  1549.                 break;

  1550.             }

  1551.         }

  1552.     }

  1553.     return sample;

  1554. }

  1555. 

  1556. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)

  1557. {

  1558.     AVStream *st;

  1559.     int64_t seek_timestamp, timestamp;

  1560.     int sample;

  1561.     int i;

  1562. 

  1563.     if (stream_index >= s->nb_streams)

  1564.         return -1;

  1565. 

  1566.     st = s->streams[stream_index];

  1567.     sample = mov_seek_stream(st, sample_time, flags);

  1568.     if (sample < 0)

  1569.         return -1;

  1570. 

  1571.     /* adjust seek timestamp to found sample timestamp */

  1572.     seek_timestamp = st->index_entries[sample].timestamp;

  1573. 

  1574.     for (i = 0; i < s->nb_streams; i++) {

  1575.         st = s->streams[i];

  1576.         if (stream_index == i || st->discard == AVDISCARD_ALL)

  1577.             continue;

  1578. 

  1579.         timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);

  1580.         mov_seek_stream(st, timestamp, flags);

  1581.     }

  1582.     return 0;

  1583. }

  1584. 

  1585. static int mov_read_close(AVFormatContext *s)

  1586. {

  1587.     int i;

  1588.     MOVContext *mov = s->priv_data;

  1589.     for(i=0; i<mov->total_streams; i++)

  1590.         mov_free_stream_context(mov->streams[i]);

  1591.     if(mov->dv_demux){

  1592.         for(i=0; i<mov->dv_fctx->nb_streams; i++){

  1593.             av_freep(&mov->dv_fctx->streams[i]->codec);

  1594.             av_freep(&mov->dv_fctx->streams[i]);

  1595.         }

  1596.         av_freep(&mov->dv_fctx);

  1597.         av_freep(&mov->dv_demux);

  1598.     }

  1599.     return 0;

  1600. }

  1601. 

  1602. AVInputFormat mov_demuxer = {

  1603.     "mov,mp4,m4a,3gp,3g2,mj2",

  1604.     "QuickTime/MPEG4/Motion JPEG 2000 format",

  1605.     sizeof(MOVContext),

  1606.     mov_probe,

  1607.     mov_read_header,

  1608.     mov_read_packet,

  1609.     mov_read_close,

  1610.     mov_read_seek,

  1611. };