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FFmpeg/libavformat/mov.c

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  1. /*

  2.  * MOV decoder.

  3.  * Copyright (c) 2001 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

  6.  * modify it under the terms of the GNU Lesser General Public

  7.  * License as published by the Free Software Foundation; either

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

  11.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  13.  * Lesser General Public License for more details.

  14.  *

  15.  * You should have received a copy of the GNU Lesser General Public

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. 

  20. #include <limits.h>

  21.  

  22. #include "avformat.h"

  23. #include "avi.h"

  24. 

  25. #ifdef CONFIG_ZLIB

  26. #include <zlib.h>

  27. #endif

  28. 

  29. /*

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

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

  32.  *

  33.  * Features and limitations:

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

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

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

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

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

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

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

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

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

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

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

  45.  *

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

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

  48.  *

  49.  * Reference documents:

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

  51.  * Apple:

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

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

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

  55.  */

  56. 

  57. //#define DEBUG

  58. #ifdef DEBUG

  59. #include <stdio.h>

  60. #include <fcntl.h>

  61. #endif

  62. 

  63. #include "qtpalette.h"

  64. 

  65. 

  66. /* Allows seeking (MOV_SPLIT_CHUNKS should also be defined) */

  67. #define MOV_SEEK

  68. 

  69. /* allows chunk splitting - should work now... */

  70. /* in case you can't read a file, try commenting */

  71. #define MOV_SPLIT_CHUNKS

  72. 

  73. /* Special handling for movies created with Minolta Dimaxe Xi*/

  74. /* this fix should not interfere with other .mov files, but just in case*/

  75. #define MOV_MINOLTA_FIX

  76. 

  77. /* some streams in QT (and in MP4 mostly) aren't either video nor audio */

  78. /* so we first list them as this, then clean up the list of streams we give back, */

  79. /* getting rid of these */

  80. #define CODEC_TYPE_MOV_OTHER	(enum CodecType) 2

  81. 

  82. static const CodecTag mov_video_tags[] = {

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

  84. /*  { CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, *//* Uncompressed RGB */

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

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

  87. /* Graphics */

  88. /* Animation */

  89. /* Apple video */

  90. /* Kodak Photo CD */

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

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

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

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

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

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

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

  98. /* Sorenson video */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  120.     { CODEC_ID_NONE, 0 },

  121. };

  122. 

  123. static const CodecTag mov_audio_tags[] = {

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

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

  126.     /* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */

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

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

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

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

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

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

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

  134. 

  135.     { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */

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

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

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

  139. /* MP4 tags */

  140.     { CODEC_ID_MPEG4AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */

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

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

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

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

  145.     { CODEC_ID_NONE, 0 },

  146. };

  147. 

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

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

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

  151.  */

  152. 

  153. typedef struct MOV_sample_to_chunk_tbl {

  154.     long first;

  155.     long count;

  156.     long id;

  157. } MOV_sample_to_chunk_tbl;

  158. 

  159. typedef struct {

  160.     uint32_t type;

  161.     int64_t offset;

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

  163. } MOV_atom_t;

  164. 

  165. typedef struct {

  166.     int seed;

  167.     int flags;

  168.     int size;

  169.     void* clrs;

  170. } MOV_ctab_t;

  171. 

  172. typedef struct {

  173.     uint8_t  version;

  174.     uint32_t flags; // 24bit

  175. 

  176.     /* 0x03 ESDescrTag */

  177.     uint16_t es_id;

  178. #define MP4ODescrTag			0x01

  179. #define MP4IODescrTag			0x02

  180. #define MP4ESDescrTag			0x03

  181. #define MP4DecConfigDescrTag		0x04

  182. #define MP4DecSpecificDescrTag		0x05

  183. #define MP4SLConfigDescrTag		0x06

  184. #define MP4ContentIdDescrTag		0x07

  185. #define MP4SupplContentIdDescrTag	0x08

  186. #define MP4IPIPtrDescrTag		0x09

  187. #define MP4IPMPPtrDescrTag		0x0A

  188. #define MP4IPMPDescrTag			0x0B

  189. #define MP4RegistrationDescrTag		0x0D

  190. #define MP4ESIDIncDescrTag		0x0E

  191. #define MP4ESIDRefDescrTag		0x0F

  192. #define MP4FileIODescrTag		0x10

  193. #define MP4FileODescrTag		0x11

  194. #define MP4ExtProfileLevelDescrTag	0x13

  195. #define MP4ExtDescrTagsStart		0x80

  196. #define MP4ExtDescrTagsEnd		0xFE

  197.     uint8_t  stream_priority;

  198. 

  199.     /* 0x04 DecConfigDescrTag */

  200.     uint8_t  object_type_id;

  201.     uint8_t  stream_type;

  202.     /* XXX: really streamType is

  203.      * only 6bit, followed by:

  204.      * 1bit  upStream

  205.      * 1bit  reserved

  206.      */

  207.     uint32_t buffer_size_db; // 24

  208.     uint32_t max_bitrate;

  209.     uint32_t avg_bitrate;

  210. 

  211.     /* 0x05 DecSpecificDescrTag */

  212.     uint8_t  decoder_cfg_len;

  213.     uint8_t *decoder_cfg;

  214. 

  215.     /* 0x06 SLConfigDescrTag */

  216.     uint8_t  sl_config_len;

  217.     uint8_t *sl_config;

  218. } MOV_esds_t;

  219. 

  220. struct MOVParseTableEntry;

  221. 

  222. typedef struct MOVStreamContext {

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

  224.     int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */

  225.     long next_chunk;

  226.     long chunk_count;

  227.     int64_t *chunk_offsets;

  228.     int32_t stts_count;

  229.     uint64_t *stts_data;            /* concatenated data from the time-to-sample atom (count|duration) */

  230.     int32_t edit_count;             /* number of 'edit' (elst atom) */

  231.     long sample_to_chunk_sz;

  232.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  233.     long sample_to_chunk_index;

  234.     long sample_size;

  235.     long sample_count;

  236.     long *sample_sizes;

  237.     long keyframe_count;

  238.     long *keyframes;

  239.     int time_scale;

  240.     long current_sample;

  241.     long left_in_chunk; /* how many samples before next chunk */

  242.     /* specific MPEG4 header which is added at the beginning of the stream */

  243.     unsigned int header_len;

  244.     uint8_t *header_data;

  245.     MOV_esds_t esds;

  246. } MOVStreamContext;

  247. 

  248. typedef struct MOVContext {

  249.     int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */

  250.     AVFormatContext *fc;

  251.     int time_scale;

  252.     int duration; /* duration of the longest track */

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

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

  255.     int64_t mdat_size;

  256.     int64_t mdat_offset;

  257.     int total_streams;

  258.     /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio

  259.      * but we need the info to be able to skip data from those streams in the 'mdat' section

  260.      */

  261.     MOVStreamContext *streams[MAX_STREAMS];

  262. 

  263.     int64_t next_chunk_offset;

  264.     MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */

  265.     int ctab_size;

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

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

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

  269. 

  270.     AVPaletteControl palette_control;

  271. } MOVContext;

  272. 

  273. 

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

  275. 

  276. /* those functions parse an atom */

  277. /* return code:

  278.  1: found what I wanted, exit

  279.  0: continue to parse next atom

  280.  -1: error occured, exit

  281.  */

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

  283. 

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

  285. typedef struct MOVParseTableEntry {

  286.     uint32_t type;

  287.     mov_parse_function func;

  288. } MOVParseTableEntry;

  289. 

  290. #ifdef DEBUG

  291. /*

  292.  * XXX: static sux, even more in a multithreaded environment...

  293.  * Avoid them. This is here just to help debugging.

  294.  */

  295. static int debug_indent = 0;

  296. void print_atom(const char *str, MOV_atom_t atom)

  297. {

  298.     unsigned int tag, i;

  299.     tag = (unsigned int) atom.type;

  300.     i=debug_indent;

  301.     if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');

  302.     while(i--)

  303.         av_log(NULL, AV_LOG_DEBUG, "|");

  304.     av_log(NULL, AV_LOG_DEBUG, "parse:");

  305.     av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",

  306.            str, tag & 0xff,

  307.            (tag >> 8) & 0xff,

  308.            (tag >> 16) & 0xff,

  309.            (tag >> 24) & 0xff,

  310.            (unsigned int)atom.offset,

  311. 	   (unsigned int)atom.size);

  312.     assert((unsigned int)atom.size < 0x7fffffff);// catching errors

  313. }

  314. #else

  315. #define print_atom(a,b)

  316. #endif

  317. 

  318. 

  319. static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  320. {

  321.     print_atom("leaf", atom);

  322. 

  323.     if (atom.size>1)

  324.         url_fskip(pb, atom.size);

  325. /*        url_seek(pb, atom_offset+atom.size, SEEK_SET); */

  326.     return 0;

  327. }

  328. 

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

  330. {

  331.     int64_t total_size = 0;

  332.     MOV_atom_t a;

  333.     int i;

  334.     int err = 0;

  335. 

  336. #ifdef DEBUG

  337.     print_atom("default", atom);

  338.     debug_indent++;

  339. #endif

  340. 

  341.     a.offset = atom.offset;

  342. 

  343.     if (atom.size < 0)

  344. 	atom.size = 0x7fffffffffffffffLL;

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

  346. 	a.size = atom.size;

  347. 	a.type=0L;

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

  349. 	    a.size = get_be32(pb);

  350.             a.type = get_le32(pb);

  351.         }

  352. 	total_size += 8;

  353.         a.offset += 8;

  354. 	//av_log(NULL, AV_LOG_DEBUG, "type: %08x  %.4s  sz: %Lx  %Lx   %Lx\n", type, (char*)&type, size, atom.size, total_size);

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

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

  357.             a.offset += 8;

  358.             total_size += 8;

  359.         }

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

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

  362. 	    if (a.size <= 8)

  363.                 break;

  364. 	}

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

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

  367. 	    /* empty */;

  368. 

  369. 	a.size -= 8;

  370. //        av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);

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

  372. //            url_seek(pb, atom.offset+atom.size, SEEK_SET);

  373. #ifdef DEBUG

  374.             print_atom("unknown", a);

  375. #endif

  376.             url_fskip(pb, a.size);

  377. 	} else {

  378. #ifdef DEBUG

  379. 	    //char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };

  380. 	    //print_atom(b, type, offset, size);

  381. #endif

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

  383. 	}

  384. 

  385. 	a.offset += a.size;

  386.         total_size += a.size;

  387.     }

  388. 

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

  390. 	//av_log(NULL, AV_LOG_DEBUG, "RESET  %Ld  %Ld  err:%d\n", atom.size, total_size, err);

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

  392.     }

  393. 

  394. #ifdef DEBUG

  395.     debug_indent--;

  396. #endif

  397.     return err;

  398. }

  399. 

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

  401. {

  402.     unsigned int len;

  403.     MOV_ctab_t *t;

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

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

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

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

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

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

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

  411.     if (len > 0) {

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

  413. 	if (t->clrs)

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

  415.     }

  416. 

  417.     return 0;

  418. }

  419. 

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

  421. {

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

  423.     int len = 0;

  424.     uint32_t type;

  425.     uint32_t ctype;

  426. 

  427.     print_atom("hdlr", atom);

  428. 

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

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

  431. 

  432.     /* component type */

  433.     ctype = get_le32(pb);

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

  435. 

  436. #ifdef DEBUG

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

  438.     av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);

  439. #endif

  440. #ifdef DEBUG

  441. /* XXX: yeah this is ugly... */

  442.     if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */

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

  444.             puts("hdlr: vide");

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

  446.             puts("hdlr: soun");

  447.     } else if(ctype == 0) { /* MP4 */

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

  449.             puts("hdlr: vide");

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

  451.             puts("hdlr: soun");

  452.         else if(type == MKTAG('o', 'd', 's', 'm'))

  453.             puts("hdlr: odsm");

  454.         else if(type == MKTAG('s', 'd', 's', 'm'))

  455.             puts("hdlr: sdsm");

  456.     } else puts("hdlr: meta");

  457. #endif

  458. 

  459.     if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */

  460.         /* helps parsing the string hereafter... */

  461.         c->mp4 = 0;

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

  463.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  465.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  466.     } else if(ctype == 0) { /* MP4 */

  467.         /* helps parsing the string hereafter... */

  468.         c->mp4 = 1;

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

  470.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  472.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  473.     }

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

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

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

  477. 

  478.     if(atom.size <= 24)

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

  480.     /* XXX: MP4 uses a C string, not a pascal one */

  481.     /* component name */

  482. 

  483.     if(c->mp4) {

  484.         /* .mp4: C string */

  485.         while(get_byte(pb) && (++len < (atom.size - 24)));

  486.     } else {

  487.         /* .mov: PASCAL string */

  488. #ifdef DEBUG

  489.         char* buf;

  490. #endif

  491.         len = get_byte(pb);

  492. #ifdef DEBUG

  493. 	buf = (uint8_t*) av_malloc(len+1);

  494. 	if (buf) {

  495. 	    get_buffer(pb, buf, len);

  496. 	    buf[len] = '\0';

  497. 	    av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf);

  498. 	    av_free(buf);

  499. 	} else

  500. #endif

  501. 	    url_fskip(pb, len);

  502.     }

  503. 

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

  505.     return 0;

  506. }

  507. 

  508. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  509. {

  510.     int len = 0;

  511.     int count = 4;

  512.     while (count--) {

  513.         int c = get_byte(pb);

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

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

  516. 	    break;

  517.     }

  518.     return len;

  519. }

  520. 

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

  522. {

  523.     int len;

  524.     *tag = get_byte(pb);

  525.     len = mov_mp4_read_descr_len(pb);

  526. #ifdef DEBUG

  527.     av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);

  528. #endif

  529.     return len;

  530. }

  531. 

  532. static inline unsigned int get_be24(ByteIOContext *s)

  533. {

  534.     unsigned int val;

  535.     val = get_byte(s) << 16;

  536.     val |= get_byte(s) << 8;

  537.     val |= get_byte(s);

  538.     return val;

  539. }

  540. 

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

  542. {

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

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

  545.     int64_t start_pos = url_ftell(pb);

  546.     int tag, len;

  547. 

  548.     print_atom("esds", atom);

  549. 

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

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

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

  553.     if (tag == MP4ESDescrTag) {

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

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

  556.     } else

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

  558. 

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

  560.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  566. 

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

  568. 	//av_log(NULL, AV_LOG_DEBUG, "LEN %d  TAG %d  m:%d a:%d\n", len, tag, sc->esds.max_bitrate, sc->esds.avg_bitrate);

  569. 	if (tag == MP4DecSpecificDescrTag) {

  570. #ifdef DEBUG

  571. 	    av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);

  572. #endif

  573. 	    st->codec.extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);

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

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

  576. 		st->codec.extradata_size = len;

  577. 	    }

  578. 	}

  579.     }

  580.     /* in any case, skip garbage */

  581.     url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));

  582.     return 0;

  583. }

  584. 

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

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

  587. {

  588.     print_atom("mdat", atom);

  589. 

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

  591.         return 0;

  592.     c->found_mdat=1;

  593.     c->mdat_offset = atom.offset;

  594.     c->mdat_size = atom.size;

  595.     if(c->found_moov)

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

  597.     url_fskip(pb, atom.size);

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

  599. }

  600. 

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

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

  603. {

  604.     int err;

  605. 

  606.     print_atom("moov", atom);

  607. 

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

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

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

  611.     c->found_moov=1;

  612.     if(c->found_mdat)

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

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

  615. }

  616. 

  617. 

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

  619. {

  620.     print_atom("mdhd", atom);

  621. 

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

  623. 

  624.     get_byte(pb); get_byte(pb);

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

  626. 

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

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

  629. 

  630.     c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);

  631. 

  632. #ifdef DEBUG

  633.     av_log(NULL, AV_LOG_DEBUG, "track[%i].time_scale = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->time_scale); /* time scale */

  634. #endif

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

  636. 

  637.     get_be16(pb); /* language */

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

  639. 

  640.     return 0;

  641. }

  642. 

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

  644. {

  645.     print_atom("mvhd", atom);

  646. 

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

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

  649. 

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

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

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

  653. #ifdef DEBUG

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

  655. #endif

  656.     c->duration = get_be32(pb); /* duration */

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

  658. 

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

  660. 

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

  662. 

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

  664. 

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

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

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

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

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

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

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

  672. 

  673.     return 0;

  674. }

  675. 

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

  677. {

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

  679. 

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

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

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

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

  684.     st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  685. 

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

  687. 	strcpy(st->codec.extradata, "SVQ3"); // fake

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

  689. 	//av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld  %s\n", atom.size, (char*)st->codec.extradata + 0x5a);

  690.     } else

  691. 	url_fskip(pb, atom.size);

  692. 

  693.     return 0;

  694. }

  695. 

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

  697. {

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

  699. 

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

  701. 

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

  703.     st->codec.extradata = (uint8_t*) 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.     int entries, i;

  718. 

  719.     print_atom("stco", atom);

  720. 

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

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

  723. 

  724.     entries = get_be32(pb);

  725.     sc->chunk_count = entries;

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

  727.     if (!sc->chunk_offsets)

  728.         return -1;

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

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

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

  732.         }

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

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

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

  736.         }

  737.     } else

  738.         return -1;

  739. #ifdef DEBUG

  740. /*

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

  742.         av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);

  743.     }

  744. */

  745. #endif

  746.     return 0;

  747. }

  748. 

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

  750. {

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

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

  753.     int entries, frames_per_sample;

  754.     uint32_t format;

  755. 

  756.     /* for palette traversal */

  757.     int color_depth;

  758.     int color_start;

  759.     int color_count;

  760.     int color_end;

  761.     int color_index;

  762.     int color_dec;

  763.     int color_greyscale;

  764.     unsigned char *color_table;

  765.     int j;

  766.     unsigned char r, g, b;

  767. 

  768.     print_atom("stsd", atom);

  769. 

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

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

  772. 

  773.     entries = get_be32(pb);

  774. 

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

  776.         enum CodecID id;

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

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

  779. 

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

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

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

  783. 

  784.         /* for MPEG4: set codec type by looking for it */

  785.         id = codec_get_id(mov_video_tags, format);

  786.         if (id >= 0) {

  787.             AVCodec *codec;

  788. 	    codec = avcodec_find_decoder(id);

  789.             if (codec)

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

  791.         }

  792. #ifdef DEBUG

  793.         av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n",

  794.                size,

  795.                (format >> 0) & 0xff,

  796.                (format >> 8) & 0xff,

  797.                (format >> 16) & 0xff,

  798.                (format >> 24) & 0xff,

  799.                st->codec.codec_type);

  800. #endif

  801. 	st->codec.codec_tag = format;

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

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

  804.             st->codec.codec_id = id;

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

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

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

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

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

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

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

  812. #if 1

  813.             if (st->codec.codec_id == CODEC_ID_MPEG4) {

  814.                 /* in some MPEG4 the width/height are not correct, so

  815.                    we ignore this info */

  816.                 st->codec.width = 0;

  817.                 st->codec.height = 0;

  818.             }

  819. #endif

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

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

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

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

  824. #ifdef DEBUG

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

  826. #endif

  827. 	    get_buffer(pb, (uint8_t *)st->codec.codec_name, 32); /* codec name */

  828. 

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

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

  831. 

  832. /*          These are set in mov_read_stts and might already be set!

  833.             st->codec.frame_rate      = 25;

  834.             st->codec.frame_rate_base = 1;

  835. */

  836. 	    size -= (16+8*4+2+32+2*2);

  837. #if 0

  838. 	    while (size >= 8) {

  839. 		MOV_atom_t a;

  840.                 int64_t start_pos;

  841. 

  842. 		a.size = get_be32(pb);

  843. 		a.type = get_le32(pb);

  844. 		size -= 8;

  845. #ifdef DEBUG

  846.                 av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",

  847.                        (a.type >> 0) & 0xff,

  848.                        (a.type >> 8) & 0xff,

  849.                        (a.type >> 16) & 0xff,

  850.                        (a.type >> 24) & 0xff,

  851. 		       a.size, size);

  852. #endif

  853.                 start_pos = url_ftell(pb);

  854. 

  855. 		switch(a.type) {

  856.                 case MKTAG('e', 's', 'd', 's'):

  857.                     {

  858.                         int tag, len;

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

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

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

  862.                         if (tag == 0x03) {

  863.                             /* MP4ESDescrTag */

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

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

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

  867.                             if (tag != 0x04)

  868.                                 goto fail;

  869.                             /* MP4DecConfigDescrTag */

  870.                             get_byte(pb); /* objectTypeId */

  871.                             get_be32(pb); /* streamType + buffer size */

  872. 			    get_be32(pb); /* max bit rate */

  873.                             get_be32(pb); /* avg bit rate */

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

  875.                             if (tag != 0x05)

  876.                                 goto fail;

  877.                             /* MP4DecSpecificDescrTag */

  878. #ifdef DEBUG

  879.                             av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);

  880. #endif

  881.                             sc->header_data = av_mallocz(len);

  882.                             if (sc->header_data) {

  883.                                 get_buffer(pb, sc->header_data, len);

  884. 				sc->header_len = len;

  885.                             }

  886.                         }

  887.                         /* in any case, skip garbage */

  888.                     }

  889.                     break;

  890.                 default:

  891.                     break;

  892.                 }

  893. 	    fail:

  894. 		av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld   %d\n", atom.size, url_ftell(pb) - start_pos);

  895. 		if (atom.size > 8) {

  896. 		    url_fskip(pb, (atom.size - 8) -

  897. 			      ((url_ftell(pb) - start_pos)));

  898. 		    size -= atom.size - 8;

  899. 		}

  900. 	    }

  901.             if (size > 0) {

  902.                 /* unknown extension */

  903.                 url_fskip(pb, size);

  904.             }

  905. #else

  906. 

  907.             /* figure out the palette situation */

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

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

  910. 

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

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

  913.                 (color_depth == 8)) {

  914. 

  915.                 if (color_greyscale) {

  916. 

  917.                     /* compute the greyscale palette */

  918.                     color_count = 1 << color_depth;

  919.                     color_index = 255;

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

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

  922.                         r = g = b = color_index;

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

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

  925.                         color_index -= color_dec;

  926.                         if (color_index < 0)

  927.                             color_index = 0;

  928.                     }

  929. 

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

  931. 

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

  933.                     color_count = 1 << color_depth;

  934.                     if (color_depth == 2)

  935.                         color_table = ff_qt_default_palette_4;

  936.                     else if (color_depth == 4)

  937.                         color_table = ff_qt_default_palette_16;

  938.                     else

  939.                         color_table = ff_qt_default_palette_256;

  940. 

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

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

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

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

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

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

  947.                     }

  948. 

  949.                 } else {

  950. 

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

  952.                     color_start = get_be32(pb);

  953.                     color_count = get_be16(pb);

  954.                     color_end = get_be16(pb);

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

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

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

  958.                          * up front */

  959.                         get_byte(pb);

  960.                         get_byte(pb);

  961.                         r = get_byte(pb);

  962.                         get_byte(pb);

  963.                         g = get_byte(pb);

  964.                         get_byte(pb);

  965.                         b = get_byte(pb);

  966.                         get_byte(pb);

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

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

  969.                     }

  970.                 }

  971. 

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

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

  974.             } else

  975.                 st->codec.palctrl = NULL;

  976. 

  977.             a.size = size;

  978. 	    mov_read_default(c, pb, a);

  979. #endif

  980. 	} else {

  981.             st->codec.codec_id = codec_get_id(mov_audio_tags, format);

  982. 	    if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244

  983. 	    {

  984. #ifdef DEBUG

  985.                av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");

  986. #endif

  987.                get_be32(pb);get_be32(pb); //Reserved_8

  988.                get_be16(pb);//Reserved_2

  989.                get_be16(pb);//Reserved_2

  990.                get_be32(pb);//Reserved_4

  991.                get_be16(pb);//TimeScale

  992.                get_be16(pb);//Reserved_2

  993. 

  994.                 //AMRSpecificBox.(10 bytes)

  995.                

  996.                get_be32(pb); //size

  997.                get_be32(pb); //type=='damr'

  998.                get_be32(pb); //vendor

  999.                get_byte(pb); //decoder version

  1000.                get_be16(pb); //mode_set

  1001.                get_byte(pb); //mode_change_period

  1002.                get_byte(pb); //frames_per_sample

  1003. 

  1004.                st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames

  1005.                if(st->codec.codec_id==CODEC_ID_AMR_NB)

  1006.                {

  1007.                    st->codec.sample_rate=8000;

  1008.                    st->codec.channels=1;

  1009.                }

  1010.                else //AMR-WB

  1011.                {

  1012.                    st->codec.sample_rate=16000;

  1013.                    st->codec.channels=1;

  1014.                }

  1015.                st->codec.bits_per_sample=16;

  1016.                st->codec.bit_rate=0; /*It is not possible to tell this before we have 

  1017.                                        an audio frame and even then every frame can be different*/

  1018. 	    }

  1019.             else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))

  1020.             {

  1021.                 //This is some stuff for the hint track, lets ignore it!

  1022.                 //Do some mp4 auto detect.

  1023.                 c->mp4=1;

  1024.                 size-=(16);

  1025.                 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/

  1026.             }

  1027.             else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))

  1028.             {

  1029.                 /* Handle mp4 audio tag */

  1030.                 get_be32(pb); /* version */

  1031.                 get_be32(pb);

  1032.                 st->codec.channels = get_be16(pb); /* channels */

  1033.                 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */

  1034.                 get_be32(pb);

  1035.                 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */

  1036.                 get_be16(pb);

  1037.                 c->mp4=1;

  1038. 		{

  1039.                 MOV_atom_t a = { format, url_ftell(pb), size - (20 + 20 + 8) };

  1040.                 mov_read_default(c, pb, a);

  1041. 		}

  1042.                 /* Get correct sample rate from extradata */

  1043.                 if(st->codec.extradata_size) {

  1044.                    const int samplerate_table[] = {

  1045.                      96000, 88200, 64000, 48000, 44100, 32000, 

  1046.                      24000, 22050, 16000, 12000, 11025, 8000,

  1047.                      7350, 0, 0, 0

  1048.                    };

  1049.                    unsigned char *px = st->codec.extradata;

  1050.                    // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels

  1051.                    int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);

  1052.                    st->codec.sample_rate = samplerate_table[samplerate_index];

  1053.                 }

  1054.             }

  1055. 	    else if(size>=(16+20))

  1056. 	    {//16 bytes read, reading atleast 20 more

  1057. #ifdef DEBUG

  1058.                 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);

  1059. #endif

  1060.                 uint16_t version = get_be16(pb); /* version */

  1061.                 get_be16(pb); /* revision level */

  1062.                 get_be32(pb); /* vendor */

  1063. 

  1064.                 st->codec.channels = get_be16(pb);		/* channel count */

  1065. 	        st->codec.bits_per_sample = get_be16(pb);	/* sample size */

  1066. 

  1067.                 /* handle specific s8 codec */

  1068.                 get_be16(pb); /* compression id = 0*/

  1069.                 get_be16(pb); /* packet size = 0 */

  1070. 

  1071.                 st->codec.sample_rate = ((get_be32(pb) >> 16));

  1072. 	        //av_log(NULL, AV_LOG_DEBUG, "CODECID %d  %d  %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);

  1073. 

  1074. 	        switch (st->codec.codec_id) {

  1075. 	        case CODEC_ID_PCM_S16BE:

  1076. 		    if (st->codec.bits_per_sample == 8)

  1077. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  1078.                     /* fall */

  1079. 	        case CODEC_ID_PCM_U8:

  1080. 		    st->codec.bit_rate = st->codec.sample_rate * 8;

  1081. 		    break;

  1082. 	        default:

  1083.                     ;

  1084. 	        }

  1085. 

  1086.                 //Read QT version 1 fields. In version 0 theese dont exist

  1087. #ifdef DEBUG

  1088.                 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);

  1089.                 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));

  1090. #endif

  1091.                 if((version==1) && size>=(16+20+16))

  1092.                 {

  1093.                     get_be32(pb); /* samples per packet */

  1094.                     get_be32(pb); /* bytes per packet */

  1095.                     get_be32(pb); /* bytes per frame */

  1096.                     get_be32(pb); /* bytes per sample */

  1097.                     if(size>(16+20+16))

  1098.                     {

  1099.                         //Optional, additional atom-based fields

  1100. #ifdef DEBUG

  1101.                         av_log(NULL, AV_LOG_DEBUG, "offest=0x%X, sizeleft=%d=0x%x,format=%c%c%c%c\n",(int)url_ftell(pb),size - (16 + 20 + 16 ),size - (16 + 20 + 16 ),

  1102.                             (format >> 0) & 0xff,

  1103.                             (format >> 8) & 0xff,

  1104.                             (format >> 16) & 0xff,

  1105.                             (format >> 24) & 0xff);

  1106. #endif

  1107.                         MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };

  1108.                         mov_read_default(c, pb, a);

  1109.                     }

  1110.                 }

  1111.                 else

  1112.                 {

  1113.                     //We should be down to 0 bytes here, but lets make sure.

  1114.                     size-=(16+20);

  1115. #ifdef DEBUG

  1116.                     if(size>0)

  1117.                         av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));

  1118. #endif

  1119.                     url_fskip(pb, size);

  1120.                 }

  1121.             }

  1122.             else

  1123.             {

  1124.                 size-=16;

  1125.                 //Unknown size, but lets do our best and skip the rest.

  1126. #ifdef DEBUG

  1127.                 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);

  1128. #endif

  1129.                 url_fskip(pb, size);

  1130.             }

  1131.         }

  1132.     }

  1133. 

  1134.     return 0;

  1135. }

  1136. 

  1137. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1138. {

  1139.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1140.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1141.     int entries, i;

  1142. 

  1143.     print_atom("stsc", atom);

  1144. 

  1145.     get_byte(pb); /* version */

  1146.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1147. 

  1148.     entries = get_be32(pb);

  1149. #ifdef DEBUG

  1150. av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1151. #endif

  1152.     sc->sample_to_chunk_sz = entries;

  1153.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1154.     if (!sc->sample_to_chunk)

  1155.         return -1;

  1156.     for(i=0; i<entries; i++) {

  1157.         sc->sample_to_chunk[i].first = get_be32(pb);

  1158.         sc->sample_to_chunk[i].count = get_be32(pb);

  1159.         sc->sample_to_chunk[i].id = get_be32(pb);

  1160. #ifdef DEBUG

  1161. /*        av_log(NULL, AV_LOG_DEBUG, "sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id); */

  1162. #endif

  1163.     }

  1164.     return 0;

  1165. }

  1166. 

  1167. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1168. {

  1169.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1170.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1171.     int entries, i;

  1172. 

  1173.     print_atom("stss", atom);

  1174. 

  1175.     get_byte(pb); /* version */

  1176.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1177. 

  1178.     entries = get_be32(pb);

  1179.     sc->keyframe_count = entries;

  1180. #ifdef DEBUG

  1181.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);

  1182. #endif

  1183.     sc->keyframes = (long*) av_malloc(entries * sizeof(long));

  1184.     if (!sc->keyframes)

  1185.         return -1;

  1186.     for(i=0; i<entries; i++) {

  1187.         sc->keyframes[i] = get_be32(pb);

  1188. #ifdef DEBUG

  1189. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */

  1190. #endif

  1191.     }

  1192.     return 0;

  1193. }

  1194. 

  1195. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1196. {

  1197.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1198.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1199.     int entries, i;

  1200. 

  1201.     print_atom("stsz", atom);

  1202. 

  1203.     get_byte(pb); /* version */

  1204.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1205. 

  1206.     sc->sample_size = get_be32(pb);

  1207.     entries = get_be32(pb);

  1208.     sc->sample_count = entries;

  1209. #ifdef DEBUG

  1210.     av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1211. #endif

  1212.     if(sc->sample_size)

  1213.         return 0; /* there isn't any table following */

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

  1215.     if (!sc->sample_sizes)

  1216.         return -1;

  1217.     for(i=0; i<entries; i++) {

  1218.         sc->sample_sizes[i] = get_be32(pb);

  1219. #ifdef DEBUG

  1220. /*        av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  1221. #endif

  1222.     }

  1223.     return 0;

  1224. }

  1225. 

  1226. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1227. {

  1228.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1229.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1230.     int entries, i;

  1231.     int64_t duration=0;

  1232.     int64_t total_sample_count=0;

  1233. 

  1234.     print_atom("stts", atom);

  1235. 

  1236.     get_byte(pb); /* version */

  1237.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1238.     entries = get_be32(pb);

  1239. 

  1240.     c->streams[c->fc->nb_streams-1]->stts_count = entries;

  1241.     c->streams[c->fc->nb_streams-1]->stts_data = (uint64_t*) av_malloc(entries * sizeof(uint64_t));

  1242. 

  1243. #ifdef DEBUG

  1244. av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1245. #endif

  1246.     for(i=0; i<entries; i++) {

  1247.         int32_t sample_duration;

  1248.         int32_t sample_count;

  1249. 

  1250.         sample_count=get_be32(pb);

  1251.         sample_duration = get_be32(pb);

  1252.         c->streams[c->fc->nb_streams - 1]->stts_data[i] = (uint64_t)sample_count<<32 | (uint64_t)sample_duration;

  1253. #ifdef DEBUG

  1254.         av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1255. #endif

  1256.         duration+=sample_duration*sample_count;

  1257.         total_sample_count+=sample_count;

  1258. 

  1259. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1260. 

  1261.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1262.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1263.             st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;

  1264. #ifdef DEBUG

  1265.             av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1266. #endif

  1267.         }

  1268. #endif

  1269.     }

  1270. 

  1271.     /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/

  1272.     if(duration>0)

  1273.     {

  1274.         av_reduce(

  1275.             &st->codec.frame_rate, 

  1276.             &st->codec.frame_rate_base, 

  1277.             c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,

  1278.             duration,

  1279.             INT_MAX

  1280.         );

  1281. 

  1282. #ifdef DEBUG

  1283.         av_log(NULL, AV_LOG_DEBUG, "FRAME RATE average (video or audio)= %f (tot sample count= %i ,tot dur= %i timescale=%d)\n", (float)st->codec.frame_rate/st->codec.frame_rate_base,total_sample_count,duration,c->streams[c->fc->nb_streams-1]->time_scale);

  1284. #endif

  1285.     }

  1286.     else

  1287.     {

  1288.         st->codec.frame_rate_base = 1;

  1289.         st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;

  1290.     }

  1291.     return 0;

  1292. }

  1293. 

  1294. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1295. {

  1296.     AVStream *st;

  1297.     MOVStreamContext *sc;

  1298. 

  1299.     print_atom("trak", atom);

  1300. 

  1301.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1302.     if (!st) return -2;

  1303.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1304.     if (!sc) {

  1305. 	av_free(st);

  1306.         return -1;

  1307.     }

  1308. 

  1309.     sc->sample_to_chunk_index = -1;

  1310.     st->priv_data = sc;

  1311.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1312.     st->start_time = 0; /* XXX: check */

  1313.     st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;

  1314.     c->streams[c->fc->nb_streams-1] = sc;

  1315. 

  1316.     return mov_read_default(c, pb, atom);

  1317. }

  1318. 

  1319. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1320. {

  1321.     AVStream *st;

  1322. 

  1323.     print_atom("tkhd", atom);

  1324. 

  1325.     st = c->fc->streams[c->fc->nb_streams-1];

  1326. 

  1327.     get_byte(pb); /* version */

  1328. 

  1329.     get_byte(pb); get_byte(pb);

  1330.     get_byte(pb); /* flags */

  1331.     /*

  1332.     MOV_TRACK_ENABLED 0x0001

  1333.     MOV_TRACK_IN_MOVIE 0x0002

  1334.     MOV_TRACK_IN_PREVIEW 0x0004

  1335.     MOV_TRACK_IN_POSTER 0x0008

  1336.     */

  1337. 

  1338.     get_be32(pb); /* creation time */

  1339.     get_be32(pb); /* modification time */

  1340.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1341.     get_be32(pb); /* reserved */

  1342.     st->start_time = 0; /* check */

  1343.     st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */

  1344.     get_be32(pb); /* reserved */

  1345.     get_be32(pb); /* reserved */

  1346. 

  1347.     get_be16(pb); /* layer */

  1348.     get_be16(pb); /* alternate group */

  1349.     get_be16(pb); /* volume */

  1350.     get_be16(pb); /* reserved */

  1351. 

  1352.     url_fskip(pb, 36); /* display matrix */

  1353. 

  1354.     /* those are fixed-point */

  1355.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1356.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1357. 

  1358.     return 0;

  1359. }

  1360. 

  1361. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1362. /* like the files created with Adobe Premiere 5.0, for samples see */

  1363. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1364. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1365. {

  1366.     int err;

  1367. 

  1368. #ifdef DEBUG

  1369.     print_atom("wide", atom);

  1370.     debug_indent++;

  1371. #endif

  1372.     if (atom.size < 8)

  1373.         return 0; /* continue */

  1374.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1375.         url_fskip(pb, atom.size - 4);

  1376.         return 0;

  1377.     }

  1378.     atom.type = get_le32(pb);

  1379.     atom.offset += 8;

  1380.     atom.size -= 8;

  1381.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1382.         url_fskip(pb, atom.size);

  1383.         return 0;

  1384.     }

  1385.     err = mov_read_mdat(c, pb, atom);

  1386. #ifdef DEBUG

  1387.     debug_indent--;

  1388. #endif

  1389.     return err;

  1390. }

  1391. 

  1392. 

  1393. #ifdef CONFIG_ZLIB

  1394. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1395. {

  1396.     return -1;

  1397. }

  1398. 

  1399. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1400. {

  1401.     ByteIOContext ctx;

  1402.     uint8_t *cmov_data;

  1403.     uint8_t *moov_data; /* uncompressed data */

  1404.     long cmov_len, moov_len;

  1405.     int ret;

  1406. 

  1407.     print_atom("cmov", atom);

  1408. 

  1409.     get_be32(pb); /* dcom atom */

  1410.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1411.         return -1;

  1412.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1413.         av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");

  1414.         return -1;

  1415.     }

  1416.     get_be32(pb); /* cmvd atom */

  1417.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1418.         return -1;

  1419.     moov_len = get_be32(pb); /* uncompressed size */

  1420.     cmov_len = atom.size - 6 * 4;

  1421. 

  1422.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1423.     if (!cmov_data)

  1424.         return -1;

  1425.     moov_data = (uint8_t *) av_malloc(moov_len);

  1426.     if (!moov_data) {

  1427.         av_free(cmov_data);

  1428.         return -1;

  1429.     }

  1430.     get_buffer(pb, cmov_data, cmov_len);

  1431.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1432.         return -1;

  1433.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1434.         return -1;

  1435.     ctx.buf_end = ctx.buffer + moov_len;

  1436.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1437.     atom.offset = 0;

  1438.     atom.size = moov_len;

  1439. #ifdef DEBUG

  1440.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1441. #endif

  1442.     ret = mov_read_default(c, &ctx, atom);

  1443.     av_free(moov_data);

  1444.     av_free(cmov_data);

  1445. 

  1446.     return ret;

  1447. }

  1448. #endif

  1449. 

  1450. /* edit list atom */

  1451. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1452. {

  1453.   int i, edit_count;

  1454.   print_atom("elst", atom);

  1455. 

  1456.   get_byte(pb); /* version */

  1457.   get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1458.   edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */

  1459.   

  1460.   for(i=0; i<edit_count; i++){

  1461.     get_be32(pb); /* Track duration */

  1462.     get_be32(pb); /* Media time */

  1463.     get_be32(pb); /* Media rate */

  1464.   }

  1465. #ifdef DEBUG

  1466.   av_log(NULL, AV_LOG_DEBUG, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count);

  1467. #endif

  1468.   return 0;

  1469. }

  1470. 

  1471. static const MOVParseTableEntry mov_default_parse_table[] = {

  1472. /* mp4 atoms */

  1473. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1474. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1475. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1476. { MKTAG( 'c', 't', 't', 's' ), mov_read_leaf }, /* composition time to sample */

  1477. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1478. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1479. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1480. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1481. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1482. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1483. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1484. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1485. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1486. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1487. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1488. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1489. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1490. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1491. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1492. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1493. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1494. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1495. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1496. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1497. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1498. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1499. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1500. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },

  1501. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1502. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1503. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC }, 

  1504. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1505. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1506. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1507. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1508. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1509. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1510. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1511. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1512. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1513. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1514. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1515. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1516. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1517. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1518. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1519. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },

  1520. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1521. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1522. /* extra mp4 */

  1523. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1524. /* QT atoms */

  1525. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1526. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1527. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1528. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1529. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1530. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1531. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1532. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1533. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1534. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1535. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1536. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1537. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1538. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1539. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1540. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1541. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1542. #ifdef CONFIG_ZLIB

  1543. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1544. #else

  1545. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1546. #endif

  1547. { 0L, mov_read_leaf }

  1548. };

  1549. 

  1550. static void mov_free_stream_context(MOVStreamContext *sc)

  1551. {

  1552.     if(sc) {

  1553.         av_free(sc->chunk_offsets);

  1554.         av_free(sc->sample_to_chunk);

  1555.         av_free(sc->sample_sizes);

  1556.         av_free(sc->keyframes);

  1557.         av_free(sc->header_data);

  1558.         av_free(sc->stts_data);        

  1559.         av_free(sc);

  1560.     }

  1561. }

  1562. 

  1563. static inline uint32_t mov_to_tag(uint8_t *buf)

  1564. {

  1565.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1566. }

  1567. 

  1568. static inline uint32_t to_be32(uint8_t *buf)

  1569. {

  1570.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1571. }

  1572. 

  1573. /* XXX: is it sufficient ? */

  1574. static int mov_probe(AVProbeData *p)

  1575. {

  1576.     unsigned int offset;

  1577.     uint32_t tag;

  1578. 

  1579.     /* check file header */

  1580.     if (p->buf_size <= 12)

  1581.         return 0;

  1582.     offset = 0;

  1583.     for(;;) {

  1584.         /* ignore invalid offset */

  1585.         if ((offset + 8) > (unsigned int)p->buf_size)

  1586.             return 0;

  1587.         tag = mov_to_tag(p->buf + offset + 4);

  1588.         switch(tag) {

  1589.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1590.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1591.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1592.         case MKTAG( 'm', 'd', 'a', 't' ):

  1593.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1594.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1595.             return AVPROBE_SCORE_MAX;

  1596.         case MKTAG( 'f', 't', 'y', 'p' ):

  1597.         case MKTAG( 's', 'k', 'i', 'p' ):

  1598.             offset = to_be32(p->buf+offset) + offset;

  1599.             break;

  1600.         default:

  1601.             /* unrecognized tag */

  1602.             return 0;

  1603.         }

  1604.     }

  1605.     return 0;

  1606. }

  1607. 

  1608. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1609. {

  1610.     MOVContext *mov = (MOVContext *) s->priv_data;

  1611.     ByteIOContext *pb = &s->pb;

  1612.     int i, j, nb, err;

  1613.     MOV_atom_t atom = { 0, 0, 0 };

  1614. 

  1615.     mov->fc = s;

  1616.     mov->parse_table = mov_default_parse_table;

  1617. #if 0

  1618.     /* XXX: I think we should auto detect */

  1619.     if(s->iformat->name[1] == 'p')

  1620.         mov->mp4 = 1;

  1621. #endif

  1622.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1623. 	atom.size = url_filesize(url_fileno(pb));

  1624.     else

  1625. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1626. 

  1627. #ifdef DEBUG

  1628.     av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);

  1629. #endif

  1630. 

  1631.     /* check MOV header */

  1632.     err = mov_read_default(mov, pb, atom);

  1633.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1634. 	av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1635. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1636. 	return -1;

  1637.     }

  1638. #ifdef DEBUG

  1639.     av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1640. #endif

  1641.     /* some cleanup : make sure we are on the mdat atom */

  1642.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1643.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1644. 

  1645.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1646. 

  1647. #ifdef DEBUG

  1648.     av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1649. #endif

  1650. 

  1651. #ifdef DEBUG

  1652.     av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);

  1653. #endif

  1654.     mov->total_streams = nb = s->nb_streams;

  1655. 

  1656. #if 1

  1657.     for(i=0; i<s->nb_streams;) {

  1658.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1659.             av_free(s->streams[i]);

  1660.             for(j=i+1; j<s->nb_streams; j++)

  1661.                 s->streams[j-1] = s->streams[j];

  1662.             s->nb_streams--;

  1663.         } else

  1664.             i++;

  1665.     }

  1666.     for(i=0; i<s->nb_streams;i++) {

  1667.         MOVStreamContext *sc;

  1668.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1669.         sc->ffindex = i;

  1670.         sc->is_ff_stream = 1;

  1671.     }

  1672. #endif

  1673. #ifdef DEBUG

  1674.     av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);

  1675. #endif

  1676.     return 0;

  1677. }

  1678. 

  1679. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1680. /* XXX:remove useless commented code sometime */

  1681. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1682. {

  1683.     MOVContext *mov = (MOVContext *) s->priv_data;

  1684.     MOVStreamContext *sc;

  1685.     int64_t offset = 0x0FFFFFFFFFFFFFFFLL;

  1686.     int i, a, b, m;

  1687.     int size;

  1688.     size = 0x0FFFFFFF;

  1689. 

  1690. #ifdef MOV_SPLIT_CHUNKS

  1691.     if (mov->partial) {

  1692. 

  1693.         int idx;

  1694. 

  1695. 	sc = mov->partial;

  1696. 	idx = sc->sample_to_chunk_index;

  1697. 

  1698.         if (idx < 0) return 0;

  1699. 	size = sc->sample_sizes[sc->current_sample];

  1700. 

  1701.         sc->current_sample++;

  1702.         sc->left_in_chunk--;

  1703. 

  1704.         if (sc->left_in_chunk <= 0)

  1705.             mov->partial = 0;

  1706.         offset = mov->next_chunk_offset;

  1707.         /* extract the sample */

  1708. 

  1709.         goto readchunk;

  1710.     }

  1711. #endif

  1712. 

  1713. again:

  1714.     sc = 0;

  1715.     for(i=0; i<mov->total_streams; i++) {

  1716. 	MOVStreamContext *msc = mov->streams[i];

  1717. 	//av_log(NULL, AV_LOG_DEBUG, "MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1718.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1719. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1720. 	    sc = msc;

  1721. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1722. 	    //av_log(NULL, AV_LOG_DEBUG, "SELETED  %Ld  i:%d\n", offset, i);

  1723.         }

  1724.     }

  1725.     if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)

  1726. 	return -1;

  1727. 

  1728.     sc->next_chunk++;

  1729. 

  1730.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1731.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1732.         mov->next_chunk_offset = offset;

  1733.     }

  1734. 

  1735. //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1736.     if(!sc->is_ff_stream) {

  1737.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1738.         mov->next_chunk_offset = offset;

  1739. 	offset = 0x0FFFFFFFFFFFFFFFLL;

  1740.         goto again;

  1741.     }

  1742. 

  1743.     /* now get the chunk size... */

  1744. 

  1745.     for(i=0; i<mov->total_streams; i++) {

  1746. 	MOVStreamContext *msc = mov->streams[i];

  1747. 	if ((msc->next_chunk < msc->chunk_count)

  1748. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1749. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1750.     }

  1751. 

  1752. #ifdef MOV_MINOLTA_FIX

  1753.     //Make sure that size is according to sample_size (Needed by .mov files 

  1754.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1755.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1756.     //but I have no such movies

  1757.     if (sc->sample_size > 0) { 

  1758.         int foundsize=0;

  1759.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1760.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) && (sc->sample_size>0) )

  1761.             {

  1762. 		// I can't figure out why for PCM audio sample_size is always 1

  1763. 		// (it should actually be channels*bits_per_second/8) but it is.

  1764. 		AVCodecContext* cod = &s->streams[sc->ffindex]->codec;

  1765.                 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))

  1766. 		    foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;

  1767. 		else

  1768. 		    foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1769.             }

  1770. #ifdef DEBUG

  1771.             /*av_log(NULL, AV_LOG_DEBUG, "sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id);*/

  1772. #endif

  1773.         }

  1774.         if( (foundsize>0) && (foundsize<size) )

  1775.         {

  1776. #ifdef DEBUG

  1777.             /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/

  1778. #endif

  1779.             size=foundsize;

  1780.         }

  1781.     }

  1782. #endif //MOV_MINOLTA_FIX

  1783. 

  1784. #ifdef MOV_SPLIT_CHUNKS

  1785.     /* split chunks into samples */

  1786.     if (sc->sample_size == 0) {

  1787.         int idx = sc->sample_to_chunk_index;

  1788.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1789. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1790.            idx++;

  1791.         sc->sample_to_chunk_index = idx;

  1792.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1793. 	    mov->partial = sc;

  1794.             /* we'll have to get those samples before next chunk */

  1795.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1796.             size = sc->sample_sizes[sc->current_sample];

  1797.         }

  1798. 

  1799.         sc->current_sample++;

  1800.     }

  1801. #endif

  1802. 

  1803. readchunk:

  1804. //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1805.     if(size == 0x0FFFFFFF)

  1806.         size = mov->mdat_size + mov->mdat_offset - offset;

  1807.     if(size < 0)

  1808.         return -1;

  1809.     if(size == 0)

  1810.         return -1;

  1811.     url_fseek(&s->pb, offset, SEEK_SET);

  1812. 

  1813.     //av_log(NULL, AV_LOG_DEBUG, "READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1814.     if (sc->header_len > 0) {

  1815.         av_new_packet(pkt, size + sc->header_len);

  1816.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1817.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1818.         /* free header */

  1819.         av_freep(&sc->header_data);

  1820.         sc->header_len = 0;

  1821.     } else {

  1822.         av_new_packet(pkt, size);

  1823.         get_buffer(&s->pb, pkt->data, pkt->size);

  1824.     }

  1825.     pkt->stream_index = sc->ffindex;

  1826.     

  1827.     // If the keyframes table exists, mark any samples that are in the table as key frames.

  1828.     // If no table exists, treat very sample as a key frame.

  1829.     if (sc->keyframes) {        

  1830.         a = 0;

  1831.         b = sc->keyframe_count - 1;

  1832.         

  1833.         while (a < b) {

  1834.             m = (a + b + 1) >> 1;

  1835.             if (sc->keyframes[m] > sc->current_sample) {

  1836.                 b = m - 1;

  1837.             } else {

  1838.                 a = m;

  1839.             }    

  1840.         }

  1841.         

  1842.         if (sc->keyframes[a] == sc->current_sample)

  1843.             pkt->flags |= PKT_FLAG_KEY;

  1844.     }

  1845.     else

  1846.         pkt->flags |= PKT_FLAG_KEY;

  1847. 

  1848. #ifdef DEBUG

  1849. /*

  1850.     av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1851.     for(i=0; i<8; i++)

  1852.         av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);

  1853.     for(i=0; i<8; i++)

  1854.         av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);

  1855.     puts("");

  1856. */

  1857. #endif

  1858. 

  1859.     mov->next_chunk_offset = offset + size;

  1860. 

  1861.     return 0;

  1862. }

  1863. 

  1864. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  1865. /**

  1866.  * Seek method based on the one described in the Appendix C of QTFileFormat.pdf

  1867.  */

  1868. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)

  1869. {

  1870.     MOVContext* mov = (MOVContext *) s->priv_data;

  1871.     MOVStreamContext* sc;

  1872.     int32_t i, a, b, m;

  1873.     int64_t sample_time;

  1874.     int64_t start_time;

  1875.     int32_t seek_sample, sample;

  1876.     int32_t duration;

  1877.     int32_t count;

  1878.     int32_t chunk;

  1879.     int32_t left_in_chunk;

  1880.     int64_t chunk_file_offset;

  1881.     int64_t sample_file_offset;

  1882.     int32_t first_chunk_sample;

  1883.     int32_t sample_to_chunk_idx;

  1884.     int mov_idx;

  1885. 

  1886.     // Find the corresponding mov stream

  1887.     for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)

  1888.         if (mov->streams[mov_idx]->ffindex == stream_index)

  1889.             break;

  1890.     if (mov_idx == mov->total_streams) {

  1891.         av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);

  1892.         return -1;

  1893.     }

  1894.     sc = mov->streams[mov_idx];

  1895. 

  1896.     // Step 1. Find the edit that contains the requested time (elst)

  1897.     if (sc->edit_count) {

  1898.         // FIXME should handle edit list

  1899.         av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);

  1900.         return -1;

  1901.     }

  1902. 

  1903.     // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */

  1904. #ifdef DEBUG

  1905.   av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);

  1906. #endif

  1907.     // convert timestamp from time_base unit to timescale unit

  1908.     sample_time = av_rescale( timestamp,

  1909.                             (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,

  1910.                             (int64_t)s->streams[stream_index]->time_base.den);

  1911.     start_time = 0; // FIXME use elst atom

  1912.     sample = 1; // sample are 0 based in table

  1913. #ifdef DEBUG

  1914.     av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);

  1915. #endif

  1916.     for (i = 0; i < sc->stts_count; i++) {

  1917.         count = (uint32_t)(sc->stts_data[i]>>32);

  1918.         duration = (uint32_t)(sc->stts_data[i]&0xffff);

  1919. //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);                

  1920. //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);        

  1921.         if ((start_time + count*duration) > sample_time) {

  1922.             sample += (sample_time - start_time) / duration;

  1923.             break;

  1924.         }

  1925.         sample += count;

  1926.         start_time += count * duration;

  1927.     }   

  1928.     /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom

  1929.        is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */

  1930. 

  1931. #ifdef DEBUG

  1932.     av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);

  1933. #endif

  1934.     if (sample > sc->sample_count) {

  1935.         av_log(s, AV_LOG_ERROR, "mov: sample pos is too high, unable to seek (req. sample=%i, sample count=%ld)\n", sample, sc->sample_count);

  1936.         return -1;

  1937.     }

  1938. 

  1939.     // Step 3. Find the prior sync. sample using the Sync sample atom (stss)

  1940.     if (sc->keyframes) {

  1941.         a = 0;

  1942.         b = sc->keyframe_count - 1;

  1943.         while (a < b) {

  1944.             m = (a + b + 1) >> 1;

  1945.             if (sc->keyframes[m] > sample) {

  1946.                 b = m - 1;

  1947.             } else {

  1948.                 a = m;

  1949.             }

  1950. #ifdef DEBUG

  1951.          // av_log(s, AV_LOG_DEBUG, "a=%i (%i) b=%i (%i) m=%i (%i) stream #%i\n", a, sc->keyframes[a], b, sc->keyframes[b], m, sc->keyframes[m], mov_idx);

  1952. #endif

  1953.         }

  1954.         seek_sample = sc->keyframes[a];

  1955.     }

  1956.     else

  1957.         seek_sample = sample; // else all samples are key frames

  1958. #ifdef DEBUG

  1959.     av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);

  1960. #endif

  1961. 

  1962.     // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)

  1963.     for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {

  1964.         b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;

  1965.         if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))

  1966.             break;

  1967.         first_chunk_sample += b;

  1968.     }

  1969.     chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;

  1970.     left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;

  1971.     first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;

  1972.     sample_to_chunk_idx = i;

  1973. #ifdef DEBUG

  1974.     av_log(s, AV_LOG_DEBUG, "Sample was found in chunk #%i at sample offset %i (idx %i)\n", chunk, seek_sample - first_chunk_sample, sample_to_chunk_idx);

  1975. #endif

  1976. 

  1977.     // Step 5. Find the offset of the chunk using the chunk offset atom

  1978.     if (!sc->chunk_offsets) {

  1979.         av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");

  1980.         return -1;

  1981.     }

  1982.     if (chunk > sc->chunk_count) {

  1983.         av_log(s, AV_LOG_ERROR, "mov: chunk offset atom too short, unable to seek (req. chunk=%i, chunk count=%li)\n", chunk, sc->chunk_count);

  1984.         return -1;

  1985.     }

  1986.     chunk_file_offset = sc->chunk_offsets[chunk - 1];

  1987. #ifdef DEBUG

  1988.     av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);

  1989. #endif

  1990. 

  1991.     // Step 6. Find the byte offset within the chunk using the sample size atom

  1992.     sample_file_offset = chunk_file_offset;

  1993.     if (sc->sample_size)

  1994.         sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;

  1995.     else {

  1996.         for (i = 0; i < (seek_sample - first_chunk_sample); i++) {

  1997.         sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];

  1998.         }

  1999.     }

  2000. #ifdef DEBUG

  2001.     av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);

  2002. #endif

  2003. 

  2004.     // Step 6. Update the parser

  2005.     mov->partial = sc;

  2006.     mov->next_chunk_offset = sample_file_offset;

  2007.     // Update current stream state

  2008.     sc->current_sample = seek_sample - 1;  // zero based

  2009.     sc->left_in_chunk = left_in_chunk;

  2010.     sc->next_chunk = chunk; // +1 -1 (zero based)

  2011.     sc->sample_to_chunk_index = sample_to_chunk_idx;

  2012. 

  2013.     // Update other streams    

  2014.     for (i = 0; i<mov->total_streams; i++) {

  2015.         MOVStreamContext *msc;

  2016.         if (i == mov_idx) continue;

  2017.         // Find the nearest 'next' chunk

  2018.         msc = mov->streams[i];

  2019.         a = 0;

  2020.         b = msc->chunk_count - 1;

  2021.         while (a < b) {

  2022.             m = (a + b + 1) >> 1;

  2023.             if (msc->chunk_offsets[m] > chunk_file_offset) {

  2024.                 b = m - 1;

  2025.             } else {

  2026.                 a = m;

  2027.             }

  2028. #ifdef DEBUG            

  2029. /*            av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"

  2030.             , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m],  i); */

  2031. #endif                  

  2032.         }

  2033.         msc->next_chunk = a;

  2034.         if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))

  2035.             msc->next_chunk ++;

  2036. #ifdef DEBUG        

  2037.         av_log(s, AV_LOG_DEBUG, "Nearest next chunk for stream #%i is #%i @%lli\n", i, msc->next_chunk+1, msc->chunk_offsets[msc->next_chunk]);

  2038. #endif        

  2039.         // Compute sample count and index in the sample_to_chunk table (what a pity)

  2040.         msc->sample_to_chunk_index = 0;

  2041.         msc->current_sample = 0;

  2042.         for(;  msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)

  2043.             && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {

  2044.             msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \

  2045.             * msc->sample_to_chunk[msc->sample_to_chunk_index].count;

  2046.         }

  2047.         msc->current_sample += (msc->next_chunk - (msc->sample_to_chunk[msc->sample_to_chunk_index].first - 1)) * sc->sample_to_chunk[msc->sample_to_chunk_index].count;

  2048.         msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;

  2049. #ifdef DEBUG        

  2050.         av_log(s, AV_LOG_DEBUG, "Next Sample for stream #%i is #%i @%i\n", i, msc->current_sample + 1, msc->sample_to_chunk_index + 1);

  2051. #endif        

  2052.     }                

  2053.     return 0;

  2054. }

  2055. #endif

  2056. 

  2057. static int mov_read_close(AVFormatContext *s)

  2058. {

  2059.     int i;

  2060.     MOVContext *mov = (MOVContext *) s->priv_data;

  2061.     for(i=0; i<mov->total_streams; i++)

  2062.         mov_free_stream_context(mov->streams[i]);

  2063.     /* free color tabs */

  2064.     for(i=0; i<mov->ctab_size; i++)

  2065. 	av_freep(&mov->ctab[i]);

  2066.     av_freep(&mov->ctab);

  2067.     return 0;

  2068. }

  2069. 

  2070. static AVInputFormat mov_iformat = {

  2071.     "mov,mp4,m4a,3gp",

  2072.     "QuickTime/MPEG4 format",

  2073.     sizeof(MOVContext),

  2074.     mov_probe,

  2075.     mov_read_header,

  2076.     mov_read_packet,

  2077.     mov_read_close,

  2078. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  2079.     mov_read_seek,

  2080. #endif    

  2081. };

  2082. 

  2083. int mov_init(void)

  2084. {

  2085.     av_register_input_format(&mov_iformat);

  2086.     return 0;

  2087. }