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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. static const AVCodecTag mov_video_tags[] = {

  70. /*  { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */

  71.     { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */

  72. /*  { CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */

  73. /*    { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, *//* YUV with alpha-channel (AVID Uncompressed) */

  74. /* Graphics */

  75. /* Animation */

  76. /* Apple video */

  77. /* Kodak Photo CD */

  78.     { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */

  79.     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */

  80.     { CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */

  81.     { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */

  82.     { CODEC_ID_MJPEG, MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */

  83. /*    { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */

  84.     { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */

  85. /* Sorenson video */

  86.     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */

  87.     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */

  88.     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/

  89.     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */

  90.     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },

  91.     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */

  92.     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },

  93.     { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */

  94. /*    { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */

  95.     { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */

  96.     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */

  97.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */

  98.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */

  99.     { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */

  100.     { CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */

  101.     { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */

  102.     { CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */

  103.     { CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */

  104.     { CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */

  105.     { CODEC_ID_MSRLE, MKTAG('W', 'R', 'L', 'E') },

  106.     { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */

  107.     { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */

  108.     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 produced by Sony HD camera */

  109.     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* HDV produced by FCP */

  110.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */

  111.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */

  112.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */

  113.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */

  114.     { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */

  115.     { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'n') }, /* AVID IMX NTSC */

  116.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */

  117.     //{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */

  118.     //{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */

  119.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */

  120.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */

  121.     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */

  122.     //{ CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */

  123.     { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */

  124.     { CODEC_ID_TIFF, MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */

  125.     { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */

  126.     { CODEC_ID_VC1,  MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */

  127.     { CODEC_ID_WMV3, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */

  128.     { CODEC_ID_PNG,  MKTAG('p', 'n', 'g', ' ') },

  129.     { CODEC_ID_NONE, 0 },

  130. };

  131. 

  132. static const AVCodecTag mov_audio_tags[] = {

  133.     { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },

  134.     { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },

  135.     { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */

  136.     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */

  137.     { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */

  138.     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */

  139.     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */

  140.     { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /*  */

  141.     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */

  142.     { CODEC_ID_ADPCM_MS, MKTAG('m', 's', 0x00, 0x02) }, /* MS ADPCM */

  143.     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */

  144.     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */

  145. 

  146.     { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */

  147.     { CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */

  148.     { CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */

  149. /*    { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */

  150. /* MP4 tags */

  151.     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */

  152.     /* The standard for mpeg4 audio is still not normalised AFAIK anyway */

  153.     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */

  154.     { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */

  155.     { CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */

  156.     { CODEC_ID_ALAC,MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */

  157.     { CODEC_ID_QDM2,MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */

  158.     { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },

  159.     { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },

  160.     { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },

  161.     { CODEC_ID_NONE, 0 },

  162. };

  163. 

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

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

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

  167.  */

  168. 

  169. typedef struct MOV_sample_to_chunk_tbl {

  170.     long first;

  171.     long count;

  172.     long id;

  173. } MOV_sample_to_chunk_tbl;

  174. 

  175. typedef struct {

  176.     uint32_t type;

  177.     int64_t offset;

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

  179. } MOV_atom_t;

  180. 

  181. typedef struct {

  182.     int seed;

  183.     int flags;

  184.     int size;

  185.     void* clrs;

  186. } MOV_ctab_t;

  187. 

  188. typedef struct MOV_mdat_atom_s {

  189.     offset_t offset;

  190.     int64_t size;

  191. } MOV_mdat_atom_t;

  192. 

  193. typedef struct {

  194.     uint8_t  version;

  195.     uint32_t flags; // 24bit

  196. 

  197.     /* 0x03 ESDescrTag */

  198.     uint16_t es_id;

  199. #define MP4ODescrTag                    0x01

  200. #define MP4IODescrTag                   0x02

  201. #define MP4ESDescrTag                   0x03

  202. #define MP4DecConfigDescrTag            0x04

  203. #define MP4DecSpecificDescrTag          0x05

  204. #define MP4SLConfigDescrTag             0x06

  205. #define MP4ContentIdDescrTag            0x07

  206. #define MP4SupplContentIdDescrTag       0x08

  207. #define MP4IPIPtrDescrTag               0x09

  208. #define MP4IPMPPtrDescrTag              0x0A

  209. #define MP4IPMPDescrTag                 0x0B

  210. #define MP4RegistrationDescrTag         0x0D

  211. #define MP4ESIDIncDescrTag              0x0E

  212. #define MP4ESIDRefDescrTag              0x0F

  213. #define MP4FileIODescrTag               0x10

  214. #define MP4FileODescrTag                0x11

  215. #define MP4ExtProfileLevelDescrTag      0x13

  216. #define MP4ExtDescrTagsStart            0x80

  217. #define MP4ExtDescrTagsEnd              0xFE

  218.     uint8_t  stream_priority;

  219. 

  220.     /* 0x04 DecConfigDescrTag */

  221.     uint8_t  object_type_id;

  222.     uint8_t  stream_type;

  223.     /* XXX: really streamType is

  224.      * only 6bit, followed by:

  225.      * 1bit  upStream

  226.      * 1bit  reserved

  227.      */

  228.     uint32_t buffer_size_db; // 24

  229.     uint32_t max_bitrate;

  230.     uint32_t avg_bitrate;

  231. 

  232.     /* 0x05 DecSpecificDescrTag */

  233.     uint8_t  decoder_cfg_len;

  234.     uint8_t *decoder_cfg;

  235. 

  236.     /* 0x06 SLConfigDescrTag */

  237.     uint8_t  sl_config_len;

  238.     uint8_t *sl_config;

  239. } MOV_esds_t;

  240. 

  241. struct MOVParseTableEntry;

  242. 

  243. typedef struct MOVStreamContext {

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

  245.     long next_chunk;

  246.     unsigned int chunk_count;

  247.     int64_t *chunk_offsets;

  248.     unsigned int stts_count;

  249.     Time2Sample *stts_data;

  250.     unsigned int ctts_count;

  251.     Time2Sample *ctts_data;

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

  253.     unsigned int sample_to_chunk_sz;

  254.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  255.     int sample_to_ctime_index;

  256.     int sample_to_ctime_sample;

  257.     unsigned int sample_size;

  258.     unsigned int sample_count;

  259.     long *sample_sizes;

  260.     unsigned int keyframe_count;

  261.     long *keyframes;

  262.     int time_scale;

  263.     int time_rate;

  264.     long current_sample;

  265.     MOV_esds_t esds;

  266.     AVRational sample_size_v1;

  267.     int dv_audio_container;

  268. } MOVStreamContext;

  269. 

  270. typedef struct MOVContext {

  271.     AVFormatContext *fc;

  272.     int time_scale;

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

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

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

  276.     int64_t mdat_offset;

  277.     int total_streams;

  278.     MOVStreamContext *streams[MAX_STREAMS];

  279. 

  280.     int ctab_size;

  281.     MOV_ctab_t **ctab;           /* color tables */

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

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

  284. 

  285.     AVPaletteControl palette_control;

  286.     MOV_mdat_atom_t *mdat_list;

  287.     int mdat_count;

  288.     DVDemuxContext *dv_demux;

  289.     AVFormatContext *dv_fctx;

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

  291. } MOVContext;

  292. 

  293. 

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

  295. 

  296. /* those functions parse an atom */

  297. /* return code:

  298.  1: found what I wanted, exit

  299.  0: continue to parse next atom

  300.  -1: error occured, exit

  301.  */

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

  303. 

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

  305. typedef struct MOVParseTableEntry {

  306.     uint32_t type;

  307.     mov_parse_function func;

  308. } MOVParseTableEntry;

  309. 

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

  311. {

  312.     int64_t total_size = 0;

  313.     MOV_atom_t a;

  314.     int i;

  315.     int err = 0;

  316. 

  317.     a.offset = atom.offset;

  318. 

  319.     if (atom.size < 0)

  320.         atom.size = 0x7fffffffffffffffLL;

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

  322.         a.size = atom.size;

  323.         a.type=0L;

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

  325.             a.size = get_be32(pb);

  326.             a.type = get_le32(pb);

  327.         }

  328.         total_size += 8;

  329.         a.offset += 8;

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

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

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

  333.             a.offset += 8;

  334.             total_size += 8;

  335.         }

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

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

  338.             if (a.size <= 8)

  339.                 break;

  340.         }

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

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

  343.             /* empty */;

  344. 

  345.         a.size -= 8;

  346. 

  347.         if(a.size < 0)

  348.             break;

  349. 

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

  351.             url_fskip(pb, a.size);

  352.         } else {

  353.             offset_t start_pos = url_ftell(pb);

  354.             int64_t left;

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

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

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

  358.                 url_fskip(pb, left);

  359.         }

  360. 

  361.         a.offset += a.size;

  362.         total_size += a.size;

  363.     }

  364. 

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

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

  367.     }

  368. 

  369.     return err;

  370. }

  371. 

  372. static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  373. {

  374. #if 1

  375.     url_fskip(pb, atom.size); // for now

  376. #else

  377.     VERY VERY BROKEN, NEVER execute this, needs rewrite

  378.     unsigned int len;

  379.     MOV_ctab_t *t;

  380.     c->ctab = av_realloc(c->ctab, ++c->ctab_size);

  381.     t = c->ctab[c->ctab_size];

  382.     t->seed = get_be32(pb);

  383.     t->flags = get_be16(pb);

  384.     t->size = get_be16(pb) + 1;

  385.     len = 2 * t->size * 4;

  386.     if (len > 0) {

  387.         t->clrs = av_malloc(len); // 16bit A R G B

  388.         if (t->clrs)

  389.             get_buffer(pb, t->clrs, len);

  390.     }

  391. #endif

  392. 

  393.     return 0;

  394. }

  395. 

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

  397. {

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

  399.     uint32_t type;

  400.     uint32_t ctype;

  401. 

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

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

  404. 

  405.     /* component type */

  406.     ctype = get_le32(pb);

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

  408. 

  409.     dprintf("ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype);

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

  411.     if(!ctype)

  412.         c->isom = 1;

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

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

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

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

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

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

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

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

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

  422.     }

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

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

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

  426. 

  427.     if(atom.size <= 24)

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

  429. 

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

  431.     return 0;

  432. }

  433. 

  434. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  435. {

  436.     int len = 0;

  437.     int count = 4;

  438.     while (count--) {

  439.         int c = get_byte(pb);

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

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

  442.             break;

  443.     }

  444.     return len;

  445. }

  446. 

  447. static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)

  448. {

  449.     int len;

  450.     *tag = get_byte(pb);

  451.     len = mov_mp4_read_descr_len(pb);

  452.     dprintf("MPEG4 description: tag=0x%02x len=%d\n", *tag, len);

  453.     return len;

  454. }

  455. 

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

  457. {

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

  459.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  460.     int tag, len;

  461. 

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

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

  464.     len = mov_mp4_read_descr(pb, &tag);

  465.     if (tag == MP4ESDescrTag) {

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

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

  468.     } else

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

  470. 

  471.     len = mov_mp4_read_descr(pb, &tag);

  472.     if (tag == MP4DecConfigDescrTag) {

  473.         sc->esds.object_type_id = get_byte(pb);

  474.         sc->esds.stream_type = get_byte(pb);

  475.         sc->esds.buffer_size_db = get_be24(pb);

  476.         sc->esds.max_bitrate = get_be32(pb);

  477.         sc->esds.avg_bitrate = get_be32(pb);

  478. 

  479.         st->codec->codec_id= codec_get_id(ff_mov_obj_type, sc->esds.object_type_id);

  480.         dprintf("esds object type id %d\n", sc->esds.object_type_id);

  481.         len = mov_mp4_read_descr(pb, &tag);

  482.         if (tag == MP4DecSpecificDescrTag) {

  483.             dprintf("Specific MPEG4 header len=%d\n", len);

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

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

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

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

  488.                 /* from mplayer */

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

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

  491.                 }

  492.             }

  493.         }

  494.     }

  495.     return 0;

  496. }

  497. 

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

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

  500. {

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

  502.         return 0;

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

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

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

  506.     c->mdat_count++;

  507.     c->found_mdat=1;

  508.     c->mdat_offset = atom.offset;

  509.     if(c->found_moov)

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

  511.     url_fskip(pb, atom.size);

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

  513. }

  514. 

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

  516. {

  517.     uint32_t type = get_le32(pb);

  518. 

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

  520.         c->isom = 1;

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

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

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

  524.     return 0;

  525. }

  526. 

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

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

  529. {

  530.     int err;

  531. 

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

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

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

  535.     c->found_moov=1;

  536.     if(c->found_mdat)

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

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

  539. }

  540. 

  541. 

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

  543. {

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

  545.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  546.     int version = get_byte(pb);

  547.     int lang;

  548. 

  549.     if (version > 1)

  550.         return 1; /* unsupported */

  551. 

  552.     get_byte(pb); get_byte(pb);

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

  554. 

  555.     if (version == 1) {

  556.         get_be64(pb);

  557.         get_be64(pb);

  558.     } else {

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

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

  561.     }

  562. 

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

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

  565. 

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

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

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

  569. 

  570.     return 0;

  571. }

  572. 

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

  574. {

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

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

  577. 

  578.     if (version == 1) {

  579.         get_be64(pb);

  580.         get_be64(pb);

  581.     } else {

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

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

  584.     }

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

  586. #ifdef DEBUG

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

  588. #endif

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

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

  591. 

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

  593. 

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

  595. 

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

  597. 

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

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

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

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

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

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

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

  605. 

  606.     return 0;

  607. }

  608. 

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

  610. {

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

  612. 

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

  614.         return -1;

  615. 

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

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

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

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

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

  621. 

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

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

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

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

  626.     } else

  627.         url_fskip(pb, atom.size);

  628. 

  629.     return 0;

  630. }

  631. 

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

  633. {

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

  635.     int little_endian = get_be16(pb);

  636. 

  637.     if (little_endian) {

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

  639.         case CODEC_ID_PCM_S24BE:

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

  641.             break;

  642.         case CODEC_ID_PCM_S32BE:

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

  644.             break;

  645.         default:

  646.             break;

  647.         }

  648.     }

  649.     return 0;

  650. }

  651. 

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

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

  654. {

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

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

  657.         return -1;

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

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

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

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

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

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

  664.     } else

  665.         url_fskip(pb, atom.size);

  666.     return 0;

  667. }

  668. 

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

  670. {

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

  672. 

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

  674.         return -1;

  675. 

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

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

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

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

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

  681. 

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

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

  684.         } else

  685.             url_fskip(pb, atom.size);

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

  687.         mov_read_default(c, pb, atom);

  688.     } else

  689.         url_fskip(pb, atom.size);

  690.     return 0;

  691. }

  692. 

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

  694. {

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

  696. 

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

  698.         return -1;

  699. 

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

  701. 

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

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

  704. 

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

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

  707.     } else

  708.         url_fskip(pb, atom.size);

  709. 

  710.     return 0;

  711. }

  712. 

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

  714. {

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

  716.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  717.     unsigned int i, entries;

  718. 

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

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

  721. 

  722.     entries = get_be32(pb);

  723. 

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

  725.         return -1;

  726. 

  727.     sc->chunk_count = entries;

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

  729.     if (!sc->chunk_offsets)

  730.         return -1;

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

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

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

  734.         }

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

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

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

  738.         }

  739.     } else

  740.         return -1;

  741. 

  742.     return 0;

  743. }

  744. 

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

  746. {

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

  748.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  749.     int entries, frames_per_sample;

  750.     uint32_t format;

  751.     uint8_t codec_name[32];

  752. 

  753.     /* for palette traversal */

  754.     int color_depth;

  755.     int color_start;

  756.     int color_count;

  757.     int color_end;

  758.     int color_index;

  759.     int color_dec;

  760.     int color_greyscale;

  761.     unsigned char *color_table;

  762.     int j;

  763.     unsigned char r, g, b;

  764. 

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

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

  767. 

  768.     entries = get_be32(pb);

  769. 

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

  771.         enum CodecID id;

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

  773.         offset_t start_pos = url_ftell(pb);

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

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

  776. 

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

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

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

  780. 

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

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

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

  784.             continue;

  785.         }

  786. 

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

  788.         id = codec_get_id(mov_audio_tags, format);

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

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

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

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

  793.             id = codec_get_id(mov_video_tags, format);

  794.             if (id <= 0)

  795.                 id = codec_get_id(codec_bmp_tags, format);

  796.             if (id > 0)

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

  798.         }

  799. 

  800.         dprintf("size=%d 4CC= %c%c%c%c codec_type=%d\n",

  801.                 size,

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

  803.                 st->codec->codec_type);

  804. 

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

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

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

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

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

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

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

  812. 

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

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

  815. 

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

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

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

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

  820. #ifdef DEBUG

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

  822. #endif

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

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

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

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

  827.             }

  828. 

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

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

  831. 

  832.             /* figure out the palette situation */

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

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

  835. 

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

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

  838.                 (color_depth == 8)) {

  839. 

  840.                 if (color_greyscale) {

  841. 

  842.                     /* compute the greyscale palette */

  843.                     color_count = 1 << color_depth;

  844.                     color_index = 255;

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

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

  847.                         r = g = b = color_index;

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

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

  850.                         color_index -= color_dec;

  851.                         if (color_index < 0)

  852.                             color_index = 0;

  853.                     }

  854. 

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

  856. 

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

  858.                     color_count = 1 << color_depth;

  859.                     if (color_depth == 2)

  860.                         color_table = ff_qt_default_palette_4;

  861.                     else if (color_depth == 4)

  862.                         color_table = ff_qt_default_palette_16;

  863.                     else

  864.                         color_table = ff_qt_default_palette_256;

  865. 

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

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

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

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

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

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

  872.                     }

  873. 

  874.                 } else {

  875. 

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

  877.                     color_start = get_be32(pb);

  878.                     color_count = get_be16(pb);

  879.                     color_end = get_be16(pb);

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

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

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

  883.                          * up front */

  884.                         get_byte(pb);

  885.                         get_byte(pb);

  886.                         r = get_byte(pb);

  887.                         get_byte(pb);

  888.                         g = get_byte(pb);

  889.                         get_byte(pb);

  890.                         b = get_byte(pb);

  891.                         get_byte(pb);

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

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

  894.                     }

  895.                 }

  896. 

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

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

  899.             } else

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

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

  902.             int bits_per_sample;

  903.             uint16_t version = get_be16(pb);

  904. 

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

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

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

  908. 

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

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

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

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

  913. 

  914.             /* handle specific s8 codec */

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

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

  917. 

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

  919. 

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

  921.             case CODEC_ID_PCM_S8:

  922.             case CODEC_ID_PCM_U8:

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

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

  925.                 break;

  926.             case CODEC_ID_PCM_S16LE:

  927.             case CODEC_ID_PCM_S16BE:

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

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

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

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

  932.                 break;

  933.             default:

  934.                 break;

  935.             }

  936. 

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

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

  939.             if(!c->isom) {

  940.                 if(version==1) {

  941.                     sc->sample_size_v1.den = get_be32(pb); /* samples per packet */

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

  943.                     sc->sample_size_v1.num = get_be32(pb); /* bytes per frame */

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

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

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

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

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

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

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

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

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

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

  954.                 }

  955.             }

  956. 

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

  958.             if (bits_per_sample) {

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

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

  961.             }

  962.         } else {

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

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

  965.         }

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

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

  968.         if (a.size > 8)

  969.             mov_read_default(c, pb, a);

  970.         else if (a.size > 0)

  971.             url_fskip(pb, a.size);

  972.     }

  973. 

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

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

  976.     }

  977. 

  978.     /* special codec parameters handling */

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

  980. #ifdef CONFIG_H261_DECODER

  981.     case CODEC_ID_H261:

  982. #endif

  983. #ifdef CONFIG_H263_DECODER

  984.     case CODEC_ID_H263:

  985. #endif

  986. #ifdef CONFIG_MPEG4_DECODER

  987.     case CODEC_ID_MPEG4:

  988. #endif

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

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

  991.         break;

  992. #ifdef CONFIG_LIBFAAD

  993.     case CODEC_ID_AAC:

  994. #endif

  995. #ifdef CONFIG_VORBIS_DECODER

  996.     case CODEC_ID_VORBIS:

  997. #endif

  998.     case CODEC_ID_MP3ON4:

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

  1000.         break;

  1001. #ifdef CONFIG_DV_DEMUXER

  1002.     case CODEC_ID_DVAUDIO:

  1003.         c->dv_fctx = av_alloc_format_context();

  1004.         c->dv_demux = dv_init_demux(c->dv_fctx);

  1005.         if (!c->dv_demux) {

  1006.             av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");

  1007.             return -1;

  1008.         }

  1009.         sc->dv_audio_container = 1;

  1010.         st->codec->codec_id = CODEC_ID_PCM_S16LE;

  1011.         break;

  1012. #endif

  1013.     /* no ifdef since parameters are always those */

  1014.     case CODEC_ID_AMR_WB:

  1015.         st->codec->sample_rate= 16000;

  1016.         st->codec->channels= 1; /* really needed */

  1017.         break;

  1018.     case CODEC_ID_AMR_NB:

  1019.         st->codec->sample_rate= 8000;

  1020.         st->codec->channels= 1; /* really needed */

  1021.         break;

  1022.     case CODEC_ID_MP2:

  1023.         st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */

  1024.         st->need_parsing = 1;

  1025.         break;

  1026.     default:

  1027.         break;

  1028.     }

  1029. 

  1030.     return 0;

  1031. }

  1032. 

  1033. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1034. {

  1035.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1036.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1037.     unsigned int i, entries;

  1038. 

  1039.     get_byte(pb); /* version */

  1040.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1041. 

  1042.     entries = get_be32(pb);

  1043. 

  1044.     if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))

  1045.         return -1;

  1046. 

  1047. #ifdef DEBUG

  1048. av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1049. #endif

  1050.     sc->sample_to_chunk_sz = entries;

  1051.     sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1052.     if (!sc->sample_to_chunk)

  1053.         return -1;

  1054.     for(i=0; i<entries; i++) {

  1055.         sc->sample_to_chunk[i].first = get_be32(pb);

  1056.         sc->sample_to_chunk[i].count = get_be32(pb);

  1057.         sc->sample_to_chunk[i].id = get_be32(pb);

  1058.     }

  1059.     return 0;

  1060. }

  1061. 

  1062. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1063. {

  1064.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1065.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1066.     unsigned int i, entries;

  1067. 

  1068.     get_byte(pb); /* version */

  1069.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1070. 

  1071.     entries = get_be32(pb);

  1072. 

  1073.     if(entries >= UINT_MAX / sizeof(long))

  1074.         return -1;

  1075. 

  1076.     sc->keyframe_count = entries;

  1077. #ifdef DEBUG

  1078.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %d\n", sc->keyframe_count);

  1079. #endif

  1080.     sc->keyframes = av_malloc(entries * sizeof(long));

  1081.     if (!sc->keyframes)

  1082.         return -1;

  1083.     for(i=0; i<entries; i++) {

  1084.         sc->keyframes[i] = get_be32(pb);

  1085. #ifdef DEBUG

  1086. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */

  1087. #endif

  1088.     }

  1089.     return 0;

  1090. }

  1091. 

  1092. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1093. {

  1094.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1095.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1096.     unsigned int i, entries, sample_size;

  1097. 

  1098.     get_byte(pb); /* version */

  1099.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1100. 

  1101.     sample_size = get_be32(pb);

  1102.     if (!sc->sample_size) /* do not overwrite value computed in stsd */

  1103.         sc->sample_size = sample_size;

  1104.     entries = get_be32(pb);

  1105.     if(entries >= UINT_MAX / sizeof(long))

  1106.         return -1;

  1107. 

  1108.     sc->sample_count = entries;

  1109.     if (sample_size)

  1110.         return 0;

  1111. 

  1112. #ifdef DEBUG

  1113.     av_log(NULL, AV_LOG_DEBUG, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);

  1114. #endif

  1115.     sc->sample_sizes = av_malloc(entries * sizeof(long));

  1116.     if (!sc->sample_sizes)

  1117.         return -1;

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

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

  1120. #ifdef DEBUG

  1121.         av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);

  1122. #endif

  1123.     }

  1124.     return 0;

  1125. }

  1126. 

  1127. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1128. {

  1129.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1130.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1131.     unsigned int i, entries;

  1132.     int64_t duration=0;

  1133.     int64_t total_sample_count=0;

  1134. 

  1135.     get_byte(pb); /* version */

  1136.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1137.     entries = get_be32(pb);

  1138.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1139.         return -1;

  1140. 

  1141.     sc->stts_count = entries;

  1142.     sc->stts_data = av_malloc(entries * sizeof(Time2Sample));

  1143. 

  1144. #ifdef DEBUG

  1145. av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1146. #endif

  1147. 

  1148.     sc->time_rate=0;

  1149. 

  1150.     for(i=0; i<entries; i++) {

  1151.         int sample_duration;

  1152.         int sample_count;

  1153. 

  1154.         sample_count=get_be32(pb);

  1155.         sample_duration = get_be32(pb);

  1156.         sc->stts_data[i].count= sample_count;

  1157.         sc->stts_data[i].duration= sample_duration;

  1158. 

  1159.         sc->time_rate= ff_gcd(sc->time_rate, sample_duration);

  1160. 

  1161.         dprintf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1162. 

  1163.         duration+=(int64_t)sample_duration*sample_count;

  1164.         total_sample_count+=sample_count;

  1165.     }

  1166. 

  1167.     st->nb_frames= total_sample_count;

  1168.     if(duration)

  1169.         st->duration= duration;

  1170.     return 0;

  1171. }

  1172. 

  1173. static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1174. {

  1175.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1176.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1177.     unsigned int i, entries;

  1178. 

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

  1180.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1181.     entries = get_be32(pb);

  1182.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1183.         return -1;

  1184. 

  1185.     sc->ctts_count = entries;

  1186.     sc->ctts_data = av_malloc(entries * sizeof(Time2Sample));

  1187. 

  1188.     dprintf("track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);

  1189. 

  1190.     for(i=0; i<entries; i++) {

  1191.         int count    =get_be32(pb);

  1192.         int duration =get_be32(pb);

  1193. 

  1194.         if (duration < 0) {

  1195.             av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");

  1196.             sc->ctts_count = 0;

  1197.             url_fskip(pb, 8 * (entries - i - 1));

  1198.             break;

  1199.         }

  1200.         sc->ctts_data[i].count   = count;

  1201.         sc->ctts_data[i].duration= duration;

  1202. 

  1203.         sc->time_rate= ff_gcd(sc->time_rate, duration);

  1204.     }

  1205.     return 0;

  1206. }

  1207. 

  1208. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1209. {

  1210.     AVStream *st;

  1211.     MOVStreamContext *sc;

  1212. 

  1213.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1214.     if (!st) return -2;

  1215.     sc = av_mallocz(sizeof(MOVStreamContext));

  1216.     if (!sc) {

  1217.         av_free(st);

  1218.         return -1;

  1219.     }

  1220. 

  1221.     st->priv_data = sc;

  1222.     st->codec->codec_type = CODEC_TYPE_DATA;

  1223.     st->start_time = 0; /* XXX: check */

  1224.     c->streams[c->fc->nb_streams-1] = sc;

  1225. 

  1226.     return mov_read_default(c, pb, atom);

  1227. }

  1228. 

  1229. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1230. {

  1231.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1232.     int version = get_byte(pb);

  1233. 

  1234.     get_byte(pb); get_byte(pb);

  1235.     get_byte(pb); /* flags */

  1236.     /*

  1237.     MOV_TRACK_ENABLED 0x0001

  1238.     MOV_TRACK_IN_MOVIE 0x0002

  1239.     MOV_TRACK_IN_PREVIEW 0x0004

  1240.     MOV_TRACK_IN_POSTER 0x0008

  1241.     */

  1242. 

  1243.     if (version == 1) {

  1244.         get_be64(pb);

  1245.         get_be64(pb);

  1246.     } else {

  1247.         get_be32(pb); /* creation time */

  1248.         get_be32(pb); /* modification time */

  1249.     }

  1250.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1251.     get_be32(pb); /* reserved */

  1252.     st->start_time = 0; /* check */

  1253.     (version == 1) ? get_be64(pb) : get_be32(pb); /* highlevel (considering edits) duration in movie timebase */

  1254.     get_be32(pb); /* reserved */

  1255.     get_be32(pb); /* reserved */

  1256. 

  1257.     get_be16(pb); /* layer */

  1258.     get_be16(pb); /* alternate group */

  1259.     get_be16(pb); /* volume */

  1260.     get_be16(pb); /* reserved */

  1261. 

  1262.     url_fskip(pb, 36); /* display matrix */

  1263. 

  1264.     /* those are fixed-point */

  1265.     get_be32(pb); /* track width */

  1266.     get_be32(pb); /* track height */

  1267. 

  1268.     return 0;

  1269. }

  1270. 

  1271. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1272. /* like the files created with Adobe Premiere 5.0, for samples see */

  1273. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1274. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1275. {

  1276.     int err;

  1277. 

  1278.     if (atom.size < 8)

  1279.         return 0; /* continue */

  1280.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1281.         url_fskip(pb, atom.size - 4);

  1282.         return 0;

  1283.     }

  1284.     atom.type = get_le32(pb);

  1285.     atom.offset += 8;

  1286.     atom.size -= 8;

  1287.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1288.         url_fskip(pb, atom.size);

  1289.         return 0;

  1290.     }

  1291.     err = mov_read_mdat(c, pb, atom);

  1292.     return err;

  1293. }

  1294. 

  1295. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1296. {

  1297. #ifdef CONFIG_ZLIB

  1298.     ByteIOContext ctx;

  1299.     uint8_t *cmov_data;

  1300.     uint8_t *moov_data; /* uncompressed data */

  1301.     long cmov_len, moov_len;

  1302.     int ret;

  1303. 

  1304.     get_be32(pb); /* dcom atom */

  1305.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1306.         return -1;

  1307.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1308.         av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");

  1309.         return -1;

  1310.     }

  1311.     get_be32(pb); /* cmvd atom */

  1312.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1313.         return -1;

  1314.     moov_len = get_be32(pb); /* uncompressed size */

  1315.     cmov_len = atom.size - 6 * 4;

  1316. 

  1317.     cmov_data = av_malloc(cmov_len);

  1318.     if (!cmov_data)

  1319.         return -1;

  1320.     moov_data = av_malloc(moov_len);

  1321.     if (!moov_data) {

  1322.         av_free(cmov_data);

  1323.         return -1;

  1324.     }

  1325.     get_buffer(pb, cmov_data, cmov_len);

  1326.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1327.         return -1;

  1328.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)

  1329.         return -1;

  1330.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1331.     atom.offset = 0;

  1332.     atom.size = moov_len;

  1333. #ifdef DEBUG

  1334. //    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1335. #endif

  1336.     ret = mov_read_default(c, &ctx, atom);

  1337.     av_free(moov_data);

  1338.     av_free(cmov_data);

  1339.     return ret;

  1340. #else

  1341.     av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");

  1342.     return -1;

  1343. #endif

  1344. }

  1345. 

  1346. /* edit list atom */

  1347. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1348. {

  1349.     int i, edit_count;

  1350. 

  1351.     get_byte(pb); /* version */

  1352.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1353.     edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */

  1354. 

  1355.     for(i=0; i<edit_count; i++){

  1356.         get_be32(pb); /* Track duration */

  1357.         get_be32(pb); /* Media time */

  1358.         get_be32(pb); /* Media rate */

  1359.     }

  1360.     dprintf("track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count);

  1361.     return 0;

  1362. }

  1363. 

  1364. static const MOVParseTableEntry mov_default_parse_table[] = {

  1365. /* mp4 atoms */

  1366. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1367. { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */

  1368. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1369. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1370. { MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },

  1371. { MKTAG( 'f', 'i', 'e', 'l' ), mov_read_extradata },

  1372. { MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },

  1373. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1374. { MKTAG( 'j', 'p', '2', 'h' ), mov_read_extradata },

  1375. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1376. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1377. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1378. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1379. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1380. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1381. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1382. { MKTAG( 'a', 'l', 'a', 'c' ), mov_read_extradata }, /* alac specific atom */

  1383. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },

  1384. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1385. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1386. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1387. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1388. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1389. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1390. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1391. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1392. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1393. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },

  1394. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1395. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1396. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1397. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1398. { 0L, NULL }

  1399. };

  1400. 

  1401. static void mov_free_stream_context(MOVStreamContext *sc)

  1402. {

  1403.     if(sc) {

  1404.         av_freep(&sc->ctts_data);

  1405.         av_freep(&sc);

  1406.     }

  1407. }

  1408. 

  1409. /* XXX: is it sufficient ? */

  1410. static int mov_probe(AVProbeData *p)

  1411. {

  1412.     unsigned int offset;

  1413.     uint32_t tag;

  1414.     int score = 0;

  1415. 

  1416.     /* check file header */

  1417.     if (p->buf_size <= 12)

  1418.         return 0;

  1419.     offset = 0;

  1420.     for(;;) {

  1421.         /* ignore invalid offset */

  1422.         if ((offset + 8) > (unsigned int)p->buf_size)

  1423.             return score;

  1424.         tag = AV_RL32(p->buf + offset + 4);

  1425.         switch(tag) {

  1426.         /* check for obvious tags */

  1427.         case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */

  1428.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1429.         case MKTAG( 'm', 'd', 'a', 't' ):

  1430.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1431.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1432.             return AVPROBE_SCORE_MAX;

  1433.         /* those are more common words, so rate then a bit less */

  1434.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1435.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1436.         case MKTAG( 'j', 'u', 'n', 'k' ):

  1437.         case MKTAG( 'p', 'i', 'c', 't' ):

  1438.             return AVPROBE_SCORE_MAX - 5;

  1439.         case MKTAG( 'f', 't', 'y', 'p' ):

  1440.         case MKTAG( 's', 'k', 'i', 'p' ):

  1441.         case MKTAG( 'u', 'u', 'i', 'd' ):

  1442.             offset = AV_RB32(p->buf+offset) + offset;

  1443.             /* if we only find those cause probedata is too small at least rate them */

  1444.             score = AVPROBE_SCORE_MAX - 50;

  1445.             break;

  1446.         default:

  1447.             /* unrecognized tag */

  1448.             return score;

  1449.         }

  1450.     }

  1451.     return score;

  1452. }

  1453. 

  1454. static void mov_build_index(MOVContext *mov, AVStream *st)

  1455. {

  1456.     MOVStreamContext *sc = st->priv_data;

  1457.     offset_t current_offset;

  1458.     int64_t current_dts = 0;

  1459.     unsigned int stts_index = 0;

  1460.     unsigned int stsc_index = 0;

  1461.     unsigned int stss_index = 0;

  1462.     unsigned int i, j, k;

  1463. 

  1464.     if (sc->sample_sizes || st->codec->codec_type == CODEC_TYPE_VIDEO || sc->dv_audio_container) {

  1465.         unsigned int current_sample = 0;

  1466.         unsigned int stts_sample = 0;

  1467.         unsigned int keyframe, sample_size;

  1468.         unsigned int distance = 0;

  1469. 

  1470.         st->nb_frames = sc->sample_count;

  1471.         for (i = 0; i < sc->chunk_count; i++) {

  1472.             current_offset = sc->chunk_offsets[i];

  1473.             if (stsc_index + 1 < sc->sample_to_chunk_sz && i + 1 == sc->sample_to_chunk[stsc_index + 1].first)

  1474.                 stsc_index++;

  1475.             for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {

  1476.                 if (current_sample >= sc->sample_count) {

  1477.                     av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");

  1478.                     goto out;

  1479.                 }

  1480.                 keyframe = !sc->keyframe_count || current_sample + 1 == sc->keyframes[stss_index];

  1481.                 if (keyframe) {

  1482.                     distance = 0;

  1483.                     if (stss_index + 1 < sc->keyframe_count)

  1484.                         stss_index++;

  1485.                 }

  1486.                 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];

  1487.                 dprintf("AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", size %d, distance %d, keyframe %d\n",

  1488.                         st->index, current_sample, current_offset, current_dts, sample_size, distance, keyframe);

  1489.                 av_add_index_entry(st, current_offset, current_dts, sample_size, distance, keyframe ? AVINDEX_KEYFRAME : 0);

  1490.                 current_offset += sample_size;

  1491.                 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);

  1492.                 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;

  1493.                 distance++;

  1494.                 stts_sample++;

  1495.                 current_sample++;

  1496.                 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {

  1497.                     stts_sample = 0;

  1498.                     stts_index++;

  1499.                 }

  1500.             }

  1501.         }

  1502.     } else { /* read whole chunk */

  1503.         unsigned int chunk_samples, chunk_size, chunk_duration;

  1504. 

  1505.         for (i = 0; i < sc->chunk_count; i++) {

  1506.             current_offset = sc->chunk_offsets[i];

  1507.             if (stsc_index + 1 < sc->sample_to_chunk_sz && i + 1 == sc->sample_to_chunk[stsc_index + 1].first)

  1508.                 stsc_index++;

  1509.             chunk_samples = sc->sample_to_chunk[stsc_index].count;

  1510.             /* get chunk size */

  1511.             if (sc->sample_size > 1 || st->codec->codec_id == CODEC_ID_PCM_U8 || st->codec->codec_id == CODEC_ID_PCM_S8)

  1512.                 chunk_size = chunk_samples * sc->sample_size;

  1513.             else if (sc->sample_size_v1.den > 0 && (chunk_samples * sc->sample_size_v1.num % sc->sample_size_v1.den == 0))

  1514.                 chunk_size = chunk_samples * sc->sample_size_v1.num / sc->sample_size_v1.den;

  1515.             else { /* workaround to find nearest next chunk offset */

  1516.                 chunk_size = INT_MAX;

  1517.                 for (j = 0; j < mov->total_streams; j++) {

  1518.                     MOVStreamContext *msc = mov->streams[j];

  1519. 

  1520.                     for (k = msc->next_chunk; k < msc->chunk_count; k++) {

  1521.                         if (msc->chunk_offsets[k] > current_offset && msc->chunk_offsets[k] - current_offset < chunk_size) {

  1522.                             chunk_size = msc->chunk_offsets[k] - current_offset;

  1523.                             msc->next_chunk = k;

  1524.                             break;

  1525.                         }

  1526.                     }

  1527.                 }

  1528.                 /* check for last chunk */

  1529.                 if (chunk_size == INT_MAX)

  1530.                     for (j = 0; j < mov->mdat_count; j++) {

  1531.                         dprintf("mdat %d, offset %"PRIx64", size %"PRId64", current offset %"PRIx64"\n",

  1532.                                 j, mov->mdat_list[j].offset, mov->mdat_list[j].size, current_offset);

  1533.                         if (mov->mdat_list[j].offset <= current_offset && mov->mdat_list[j].offset + mov->mdat_list[j].size > current_offset)

  1534.                             chunk_size = mov->mdat_list[j].offset + mov->mdat_list[j].size - current_offset;

  1535.                     }

  1536.                 assert(chunk_size != INT_MAX);

  1537.                 for (j = 0; j < mov->total_streams; j++) {

  1538.                     mov->streams[j]->next_chunk = 0;

  1539.                 }

  1540.             }

  1541.             av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);

  1542.             /* get chunk duration */

  1543.             chunk_duration = 0;

  1544.             while (chunk_samples > 0) {

  1545.                 if (chunk_samples < sc->stts_data[stts_index].count) {

  1546.                     chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1547.                     sc->stts_data[stts_index].count -= chunk_samples;

  1548.                     break;

  1549.                 } else {

  1550.                     chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;

  1551.                     chunk_samples -= sc->stts_data[stts_index].count;

  1552.                     if (stts_index + 1 < sc->stts_count) {

  1553.                         stts_index++;

  1554.                     }

  1555.                 }

  1556.             }

  1557.             dprintf("AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", size %d, duration %d\n",

  1558.                     st->index, i, current_offset, current_dts, chunk_size, chunk_duration);

  1559.             assert(chunk_duration % sc->time_rate == 0);

  1560.             current_dts += chunk_duration / sc->time_rate;

  1561.         }

  1562.     }

  1563.  out:

  1564.     /* adjust sample count to avindex entries */

  1565.     sc->sample_count = st->nb_index_entries;

  1566. }

  1567. 

  1568. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1569. {

  1570.     MOVContext *mov = (MOVContext *) s->priv_data;

  1571.     ByteIOContext *pb = &s->pb;

  1572.     int i, err;

  1573.     MOV_atom_t atom = { 0, 0, 0 };

  1574. 

  1575.     mov->fc = s;

  1576.     mov->parse_table = mov_default_parse_table;

  1577. 

  1578.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1579.         atom.size = url_fsize(pb);

  1580.     else

  1581.         atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1582. 

  1583.     /* check MOV header */

  1584.     err = mov_read_default(mov, pb, atom);

  1585.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1586.         av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",

  1587.                 err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1588.         return -1;

  1589.     }

  1590.     dprintf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1591. 

  1592.     /* some cleanup : make sure we are on the mdat atom */

  1593.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1594.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1595. 

  1596.     mov->total_streams = s->nb_streams;

  1597. 

  1598.     for(i=0; i<mov->total_streams; i++) {

  1599.         MOVStreamContext *sc = mov->streams[i];

  1600.         /* sanity checks */

  1601.         if(!sc->stts_count || !sc->chunk_count || !sc->sample_to_chunk_sz ||

  1602.            (!sc->sample_size && !sc->sample_count)){

  1603.             av_log(s, AV_LOG_ERROR, "missing mandatory atoms, broken header\n");

  1604.             return -1;

  1605.         }

  1606.         if(!sc->time_rate)

  1607.             sc->time_rate=1;

  1608.         if(!sc->time_scale)

  1609.             sc->time_scale= mov->time_scale;

  1610.         av_set_pts_info(s->streams[i], 64, sc->time_rate, sc->time_scale);

  1611. 

  1612.         if(s->streams[i]->duration != AV_NOPTS_VALUE){

  1613.             assert(s->streams[i]->duration % sc->time_rate == 0);

  1614.             s->streams[i]->duration /= sc->time_rate;

  1615.         }

  1616.         sc->ffindex = i;

  1617.         mov_build_index(mov, s->streams[i]);

  1618.     }

  1619. 

  1620.     for(i=0; i<mov->total_streams; i++) {

  1621.         /* dont need those anymore */

  1622.         av_freep(&mov->streams[i]->chunk_offsets);

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

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

  1625.         av_freep(&mov->streams[i]->keyframes);

  1626.         av_freep(&mov->streams[i]->stts_data);

  1627.     }

  1628.     av_freep(&mov->mdat_list);

  1629.     return 0;

  1630. }

  1631. 

  1632. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1633. {

  1634.     MOVContext *mov = s->priv_data;

  1635.     MOVStreamContext *sc = 0;

  1636.     AVIndexEntry *sample = 0;

  1637.     int64_t best_dts = INT64_MAX;

  1638.     int i;

  1639. 

  1640.     for (i = 0; i < mov->total_streams; i++) {

  1641.         MOVStreamContext *msc = mov->streams[i];

  1642. 

  1643.         if (s->streams[i]->discard != AVDISCARD_ALL && msc->current_sample < msc->sample_count) {

  1644.             AVIndexEntry *current_sample = &s->streams[i]->index_entries[msc->current_sample];

  1645.             int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate, AV_TIME_BASE, msc->time_scale);

  1646. 

  1647.             dprintf("stream %d, sample %ld, dts %"PRId64"\n", i, msc->current_sample, dts);

  1648.             if (dts < best_dts) {

  1649.                 sample = current_sample;

  1650.                 best_dts = dts;

  1651.                 sc = msc;

  1652.             }

  1653.         }

  1654.     }

  1655.     if (!sample)

  1656.         return -1;

  1657.     /* must be done just before reading, to avoid infinite loop on sample */

  1658.     sc->current_sample++;

  1659.     if (sample->pos >= url_fsize(&s->pb)) {

  1660.         av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n", sc->ffindex, sample->pos);

  1661.         return -1;

  1662.     }

  1663. #ifdef CONFIG_DV_DEMUXER

  1664.     if (sc->dv_audio_container) {

  1665.         dv_get_packet(mov->dv_demux, pkt);

  1666.         dprintf("dv audio pkt size %d\n", pkt->size);

  1667.     } else {

  1668. #endif

  1669.         url_fseek(&s->pb, sample->pos, SEEK_SET);

  1670.         av_get_packet(&s->pb, pkt, sample->size);

  1671. #ifdef CONFIG_DV_DEMUXER

  1672.         if (mov->dv_demux) {

  1673.             void *pkt_destruct_func = pkt->destruct;

  1674.             dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);

  1675.             pkt->destruct = pkt_destruct_func;

  1676.         }

  1677.     }

  1678. #endif

  1679.     pkt->stream_index = sc->ffindex;

  1680.     pkt->dts = sample->timestamp;

  1681.     if (sc->ctts_data) {

  1682.         assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);

  1683.         pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;

  1684.         /* update ctts context */

  1685.         sc->sample_to_ctime_sample++;

  1686.         if (sc->sample_to_ctime_index < sc->ctts_count && sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {

  1687.             sc->sample_to_ctime_index++;

  1688.             sc->sample_to_ctime_sample = 0;

  1689.         }

  1690.     } else {

  1691.         pkt->pts = pkt->dts;

  1692.     }

  1693.     pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;

  1694.     pkt->pos = sample->pos;

  1695.     dprintf("stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n", pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);

  1696.     return 0;

  1697. }

  1698. 

  1699. static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)

  1700. {

  1701.     MOVStreamContext *sc = st->priv_data;

  1702.     int sample, time_sample;

  1703.     int i;

  1704. 

  1705.     sample = av_index_search_timestamp(st, timestamp, flags);

  1706.     dprintf("stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);

  1707.     if (sample < 0) /* not sure what to do */

  1708.         return -1;

  1709.     sc->current_sample = sample;

  1710.     dprintf("stream %d, found sample %ld\n", st->index, sc->current_sample);

  1711.     /* adjust ctts index */

  1712.     if (sc->ctts_data) {

  1713.         time_sample = 0;

  1714.         for (i = 0; i < sc->ctts_count; i++) {

  1715.             time_sample += sc->ctts_data[i].count;

  1716.             if (time_sample >= sc->current_sample) {

  1717.                 sc->sample_to_ctime_index = i;

  1718.                 sc->sample_to_ctime_sample = time_sample - sc->current_sample;

  1719.                 break;

  1720.             }

  1721.         }

  1722.     }

  1723.     return sample;

  1724. }

  1725. 

  1726. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)

  1727. {

  1728.     AVStream *st;

  1729.     int64_t seek_timestamp, timestamp;

  1730.     int sample;

  1731.     int i;

  1732. 

  1733.     if (stream_index >= s->nb_streams)

  1734.         return -1;

  1735. 

  1736.     st = s->streams[stream_index];

  1737.     sample = mov_seek_stream(st, sample_time, flags);

  1738.     if (sample < 0)

  1739.         return -1;

  1740. 

  1741.     /* adjust seek timestamp to found sample timestamp */

  1742.     seek_timestamp = st->index_entries[sample].timestamp;

  1743. 

  1744.     for (i = 0; i < s->nb_streams; i++) {

  1745.         st = s->streams[i];

  1746.         if (stream_index == i || st->discard == AVDISCARD_ALL)

  1747.             continue;

  1748. 

  1749.         timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);

  1750.         mov_seek_stream(st, timestamp, flags);

  1751.     }

  1752.     return 0;

  1753. }

  1754. 

  1755. static int mov_read_close(AVFormatContext *s)

  1756. {

  1757.     int i;

  1758.     MOVContext *mov = (MOVContext *) s->priv_data;

  1759.     for(i=0; i<mov->total_streams; i++)

  1760.         mov_free_stream_context(mov->streams[i]);

  1761.     /* free color tabs */

  1762.     for(i=0; i<mov->ctab_size; i++)

  1763.         av_freep(&mov->ctab[i]);

  1764.     if(mov->dv_demux){

  1765.         for(i=0; i<mov->dv_fctx->nb_streams; i++){

  1766.             av_freep(&mov->dv_fctx->streams[i]->codec);

  1767.             av_freep(&mov->dv_fctx->streams[i]);

  1768.         }

  1769.         av_freep(&mov->dv_fctx);

  1770.         av_freep(&mov->dv_demux);

  1771.     }

  1772.     av_freep(&mov->ctab);

  1773.     return 0;

  1774. }

  1775. 

  1776. AVInputFormat mov_demuxer = {

  1777.     "mov,mp4,m4a,3gp,3g2,mj2",

  1778.     "QuickTime/MPEG4/Motion JPEG 2000 format",

  1779.     sizeof(MOVContext),

  1780.     mov_probe,

  1781.     mov_read_header,

  1782.     mov_read_packet,

  1783.     mov_read_close,

  1784.     mov_read_seek,

  1785. };