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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_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  122.     { CODEC_ID_NONE, 0 },

  123. };

  124. 

  125. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  136. 

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

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

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

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

  141. /* MP4 tags */

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

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

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

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

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

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

  148.     { CODEC_ID_NONE, 0 },

  149. };

  150. 

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

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

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

  154.  */

  155. 

  156. typedef struct MOV_sample_to_chunk_tbl {

  157.     long first;

  158.     long count;

  159.     long id;

  160. } MOV_sample_to_chunk_tbl;

  161. 

  162. typedef struct {

  163.     uint32_t type;

  164.     int64_t offset;

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

  166. } MOV_atom_t;

  167. 

  168. typedef struct {

  169.     int seed;

  170.     int flags;

  171.     int size;

  172.     void* clrs;

  173. } MOV_ctab_t;

  174. 

  175. typedef struct {

  176.     uint8_t  version;

  177.     uint32_t flags; // 24bit

  178. 

  179.     /* 0x03 ESDescrTag */

  180.     uint16_t es_id;

  181. #define MP4ODescrTag			0x01

  182. #define MP4IODescrTag			0x02

  183. #define MP4ESDescrTag			0x03

  184. #define MP4DecConfigDescrTag		0x04

  185. #define MP4DecSpecificDescrTag		0x05

  186. #define MP4SLConfigDescrTag		0x06

  187. #define MP4ContentIdDescrTag		0x07

  188. #define MP4SupplContentIdDescrTag	0x08

  189. #define MP4IPIPtrDescrTag		0x09

  190. #define MP4IPMPPtrDescrTag		0x0A

  191. #define MP4IPMPDescrTag			0x0B

  192. #define MP4RegistrationDescrTag		0x0D

  193. #define MP4ESIDIncDescrTag		0x0E

  194. #define MP4ESIDRefDescrTag		0x0F

  195. #define MP4FileIODescrTag		0x10

  196. #define MP4FileODescrTag		0x11

  197. #define MP4ExtProfileLevelDescrTag	0x13

  198. #define MP4ExtDescrTagsStart		0x80

  199. #define MP4ExtDescrTagsEnd		0xFE

  200.     uint8_t  stream_priority;

  201. 

  202.     /* 0x04 DecConfigDescrTag */

  203.     uint8_t  object_type_id;

  204.     uint8_t  stream_type;

  205.     /* XXX: really streamType is

  206.      * only 6bit, followed by:

  207.      * 1bit  upStream

  208.      * 1bit  reserved

  209.      */

  210.     uint32_t buffer_size_db; // 24

  211.     uint32_t max_bitrate;

  212.     uint32_t avg_bitrate;

  213. 

  214.     /* 0x05 DecSpecificDescrTag */

  215.     uint8_t  decoder_cfg_len;

  216.     uint8_t *decoder_cfg;

  217. 

  218.     /* 0x06 SLConfigDescrTag */

  219.     uint8_t  sl_config_len;

  220.     uint8_t *sl_config;

  221. } MOV_esds_t;

  222. 

  223. struct MOVParseTableEntry;

  224. 

  225. typedef struct Time2Sample{

  226.     int count;

  227.     int duration;

  228. }Time2Sample;

  229. 

  230. typedef struct MOVStreamContext {

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

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

  233.     long next_chunk;

  234.     long chunk_count;

  235.     int64_t *chunk_offsets;

  236.     int stts_count;

  237.     Time2Sample *stts_data;

  238.     int ctts_count;

  239.     Time2Sample *ctts_data;

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

  241.     long sample_to_chunk_sz;

  242.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  243.     long sample_to_chunk_index;

  244.     int sample_to_time_index;	 

  245.     long sample_to_time_sample;	 

  246.     uint64_t sample_to_time_time;    

  247.     int sample_to_ctime_index;

  248.     int sample_to_ctime_sample;

  249.     long sample_size;

  250.     long sample_count;

  251.     long *sample_sizes;

  252.     long keyframe_count;

  253.     long *keyframes;

  254.     int time_scale;

  255.     long current_sample;

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

  257.     MOV_esds_t esds;

  258. } MOVStreamContext;

  259. 

  260. typedef struct MOVContext {

  261.     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) */

  262.     AVFormatContext *fc;

  263.     int time_scale;

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

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

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

  267.     int64_t mdat_size;

  268.     int64_t mdat_offset;

  269.     int ni;                                         ///< non interleaved mode

  270.     int total_streams;

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

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

  273.      */

  274.     MOVStreamContext *streams[MAX_STREAMS];

  275. 

  276.     int64_t next_chunk_offset;

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

  278.     int ctab_size;

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

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

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

  282. 

  283.     AVPaletteControl palette_control;

  284. } MOVContext;

  285. 

  286. 

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

  288. 

  289. /* those functions parse an atom */

  290. /* return code:

  291.  1: found what I wanted, exit

  292.  0: continue to parse next atom

  293.  -1: error occured, exit

  294.  */

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

  296. 

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

  298. typedef struct MOVParseTableEntry {

  299.     uint32_t type;

  300.     mov_parse_function func;

  301. } MOVParseTableEntry;

  302. 

  303. #ifdef DEBUG

  304. /*

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

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

  307.  */

  308. static int debug_indent = 0;

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

  310. {

  311.     unsigned int tag, i;

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

  313.     i=debug_indent;

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

  315.     while(i--)

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

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

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

  319.            str, tag & 0xff,

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

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

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

  323.            (unsigned int)atom.offset,

  324. 	   (unsigned int)atom.size);

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

  326. }

  327. #else

  328. #define print_atom(a,b)

  329. #endif

  330. 

  331. 

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

  333. {

  334.     print_atom("leaf", atom);

  335. 

  336.     if (atom.size>1)

  337.         url_fskip(pb, atom.size);

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

  339.     return 0;

  340. }

  341. 

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

  343. {

  344.     int64_t total_size = 0;

  345.     MOV_atom_t a;

  346.     int i;

  347.     int err = 0;

  348. 

  349. #ifdef DEBUG

  350.     print_atom("default", atom);

  351.     debug_indent++;

  352. #endif

  353. 

  354.     a.offset = atom.offset;

  355. 

  356.     if (atom.size < 0)

  357. 	atom.size = 0x7fffffffffffffffLL;

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

  359. 	a.size = atom.size;

  360. 	a.type=0L;

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

  362. 	    a.size = get_be32(pb);

  363.             a.type = get_le32(pb);

  364.         }

  365. 	total_size += 8;

  366.         a.offset += 8;

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

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

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

  370.             a.offset += 8;

  371.             total_size += 8;

  372.         }

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

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

  375. 	    if (a.size <= 8)

  376.                 break;

  377. 	}

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

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

  380. 	    /* empty */;

  381. 

  382. 	a.size -= 8;

  383.         

  384.         if(a.size < 0)

  385.             break;

  386.         

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

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

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

  390. #ifdef DEBUG

  391.             print_atom("unknown", a);

  392. #endif

  393.             url_fskip(pb, a.size);

  394. 	} else {

  395. #ifdef DEBUG

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

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

  398. #endif

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

  400. 	}

  401. 

  402. 	a.offset += a.size;

  403.         total_size += a.size;

  404.     }

  405. 

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

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

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

  409.     }

  410. 

  411. #ifdef DEBUG

  412.     debug_indent--;

  413. #endif

  414.     return err;

  415. }

  416. 

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

  418. {

  419. #if 1

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

  421. #else

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

  423.     unsigned int len;

  424.     MOV_ctab_t *t;

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

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

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

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

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

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

  431.     if (len > 0) {

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

  433. 	if (t->clrs)

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

  435.     }

  436. #endif

  437. 

  438.     return 0;

  439. }

  440. 

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

  442. {

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

  444.     int len = 0;

  445.     uint32_t type;

  446.     uint32_t ctype;

  447. 

  448.     print_atom("hdlr", atom);

  449. 

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

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

  452. 

  453.     /* component type */

  454.     ctype = get_le32(pb);

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

  456. 

  457. #ifdef DEBUG

  458.     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);

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

  460. #endif

  461. #ifdef DEBUG

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

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

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

  465.             puts("hdlr: vide");

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

  467.             puts("hdlr: soun");

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

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

  470.             puts("hdlr: vide");

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

  472.             puts("hdlr: soun");

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

  474.             puts("hdlr: odsm");

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

  476.             puts("hdlr: sdsm");

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

  478. #endif

  479. 

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

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

  482.         c->mp4 = 0;

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

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

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

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

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

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

  489.         c->mp4 = 1;

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

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

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

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

  494.     }

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

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

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

  498. 

  499.     if(atom.size <= 24)

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

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

  502.     /* component name */

  503. 

  504.     if(c->mp4) {

  505.         /* .mp4: C string */

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

  507.     } else {

  508.         /* .mov: PASCAL string */

  509. #ifdef DEBUG

  510.         char* buf;

  511. #endif

  512.         len = get_byte(pb);

  513. #ifdef DEBUG

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

  515. 	if (buf) {

  516. 	    get_buffer(pb, buf, len);

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

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

  519. 	    av_free(buf);

  520. 	} else

  521. #endif

  522. 	    url_fskip(pb, len);

  523.     }

  524. 

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

  526.     return 0;

  527. }

  528. 

  529. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  530. {

  531.     int len = 0;

  532.     int count = 4;

  533.     while (count--) {

  534.         int c = get_byte(pb);

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

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

  537. 	    break;

  538.     }

  539.     return len;

  540. }

  541. 

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

  543. {

  544.     int len;

  545.     *tag = get_byte(pb);

  546.     len = mov_mp4_read_descr_len(pb);

  547. #ifdef DEBUG

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

  549. #endif

  550.     return len;

  551. }

  552. 

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

  554. {

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

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

  557.     int64_t start_pos = url_ftell(pb);

  558.     int tag, len;

  559. 

  560.     print_atom("esds", atom);

  561. 

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

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

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

  565.     if (tag == MP4ESDescrTag) {

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

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

  568.     } else

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

  570. 

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

  572.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  578. 

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

  580. 	//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);

  581. 	if (tag == MP4DecSpecificDescrTag) {

  582. #ifdef DEBUG

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

  584. #endif

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

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

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

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

  589. 	    }

  590. 	}

  591.     }

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

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

  594.     return 0;

  595. }

  596. 

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

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

  599. {

  600.     print_atom("mdat", atom);

  601. 

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

  603.         return 0;

  604.     c->found_mdat=1;

  605.     c->mdat_offset = atom.offset;

  606.     c->mdat_size = atom.size;

  607.     if(c->found_moov)

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

  609.     url_fskip(pb, atom.size);

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

  611. }

  612. 

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

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

  615. {

  616.     int err;

  617. 

  618.     print_atom("moov", atom);

  619. 

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

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

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

  623.     c->found_moov=1;

  624.     if(c->found_mdat)

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

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

  627. }

  628. 

  629. 

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

  631. {

  632.     print_atom("mdhd", atom);

  633. 

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

  635. 

  636.     get_byte(pb); get_byte(pb);

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

  638. 

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

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

  641. 

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

  643.     av_set_pts_info(c->fc->streams[c->fc->nb_streams-1], 64, 1, c->streams[c->fc->nb_streams-1]->time_scale);

  644. 

  645. #ifdef DEBUG

  646.     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 */

  647. #endif

  648.     c->fc->streams[c->fc->nb_streams-1]->duration= get_be32(pb); /* duration */

  649. 

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

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

  652. 

  653.     return 0;

  654. }

  655. 

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

  657. {

  658.     print_atom("mvhd", atom);

  659. 

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

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

  662. 

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

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

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

  666. #ifdef DEBUG

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

  668. #endif

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

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

  671. 

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

  673. 

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

  675. 

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

  677. 

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

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

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

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

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

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

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

  685. 

  686.     return 0;

  687. }

  688. 

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

  690. {

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

  692. 

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

  694.         return -1;

  695.     

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

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

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

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

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

  701. 

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

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

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

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

  706.     } else

  707. 	url_fskip(pb, atom.size);

  708. 

  709.     return 0;

  710. }

  711. 

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

  713. {

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

  715. 

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

  717.         return -1;

  718. 

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

  720. 

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

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

  723. 

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

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

  726.     } else

  727. 	url_fskip(pb, atom.size);

  728. 

  729.     return 0;

  730. }

  731. 

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

  733. {

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

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

  736.     unsigned int i, entries;

  737. 

  738.     print_atom("stco", atom);

  739. 

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

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

  742. 

  743.     entries = get_be32(pb);

  744.         

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

  746.         return -1;

  747.  

  748.     sc->chunk_count = entries;

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

  750.     if (!sc->chunk_offsets)

  751.         return -1;

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

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

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

  755.         }

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

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

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

  759.         }

  760.     } else

  761.         return -1;

  762.     

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

  764.         MOVStreamContext *sc2 = (MOVStreamContext *)c->fc->streams[i]->priv_data;

  765.         if(sc2 && sc2->chunk_offsets){

  766.             int64_t first= sc2->chunk_offsets[0];

  767.             int64_t last= sc2->chunk_offsets[sc2->chunk_count-1];

  768.             if(first >= sc->chunk_offsets[entries-1] || last <= sc->chunk_offsets[0])

  769.                 c->ni=1;

  770.         }

  771.     }

  772. #ifdef DEBUG

  773. /*

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

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

  776.     }

  777. */

  778. #endif

  779.     return 0;

  780. }

  781. 

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

  783. {

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

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

  786.     int entries, frames_per_sample;

  787.     uint32_t format;

  788.     uint8_t codec_name[32];

  789. 

  790.     /* for palette traversal */

  791.     int color_depth;

  792.     int color_start;

  793.     int color_count;

  794.     int color_end;

  795.     int color_index;

  796.     int color_dec;

  797.     int color_greyscale;

  798.     unsigned char *color_table;

  799.     int j;

  800.     unsigned char r, g, b;

  801. 

  802.     print_atom("stsd", atom);

  803. 

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

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

  806. 

  807.     entries = get_be32(pb);

  808. 

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

  810.         enum CodecID id;

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

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

  813. 

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

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

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

  817. 

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

  819.         id = codec_get_id(mov_video_tags, format);

  820.         if (id >= 0) {

  821.             AVCodec *codec;

  822. 	    codec = avcodec_find_decoder(id);

  823.             if (codec)

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

  825.         }

  826. #ifdef DEBUG

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

  828.                size,

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

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

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

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

  833.                st->codec->codec_type);

  834. #endif

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

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

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

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

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

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

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

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

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

  844.             if(st->codec->codec_id == CODEC_ID_MPEG4){ //FIXME this is silly

  845.                 get_be16(pb);

  846.                 get_be16(pb);

  847.             }else{

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

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

  850.             }

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

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

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

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

  855. #ifdef DEBUG

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

  857. #endif

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

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

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

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

  862.         }

  863. 

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

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

  866. 

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

  868.             st->codec->time_base.den      = 25;

  869.             st->codec->time_base.num = 1;

  870. */

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

  872. #if 0

  873. 	    while (size >= 8) {

  874. 		MOV_atom_t a;

  875.                 int64_t start_pos;

  876. 

  877. 		a.size = get_be32(pb);

  878. 		a.type = get_le32(pb);

  879. 		size -= 8;

  880. #ifdef DEBUG

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

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

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

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

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

  886. 		       a.size, size);

  887. #endif

  888.                 start_pos = url_ftell(pb);

  889. 

  890. 		switch(a.type) {

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

  892.                     {

  893.                         int tag, len;

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

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

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

  897.                         if (tag == 0x03) {

  898.                             /* MP4ESDescrTag */

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

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

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

  902.                             if (tag != 0x04)

  903.                                 goto fail;

  904.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  910.                             if (tag != 0x05)

  911.                                 goto fail;

  912.                             /* MP4DecSpecificDescrTag */

  913. #ifdef DEBUG

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

  915. #endif

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

  917.                             if (sc->header_data) {

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

  919. 				sc->header_len = len;

  920.                             }

  921.                         }

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

  923.                     }

  924.                     break;

  925.                 default:

  926.                     break;

  927.                 }

  928. 	    fail:

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

  930. 		if (atom.size > 8) {

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

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

  933. 		    size -= atom.size - 8;

  934. 		}

  935. 	    }

  936.             if (size > 0) {

  937.                 /* unknown extension */

  938.                 url_fskip(pb, size);

  939.             }

  940. #else

  941. 

  942.             /* figure out the palette situation */

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

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

  945. 

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

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

  948.                 (color_depth == 8)) {

  949. 

  950.                 if (color_greyscale) {

  951. 

  952.                     /* compute the greyscale palette */

  953.                     color_count = 1 << color_depth;

  954.                     color_index = 255;

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

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

  957.                         r = g = b = color_index;

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

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

  960.                         color_index -= color_dec;

  961.                         if (color_index < 0)

  962.                             color_index = 0;

  963.                     }

  964. 

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

  966. 

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

  968.                     color_count = 1 << color_depth;

  969.                     if (color_depth == 2)

  970.                         color_table = ff_qt_default_palette_4;

  971.                     else if (color_depth == 4)

  972.                         color_table = ff_qt_default_palette_16;

  973.                     else

  974.                         color_table = ff_qt_default_palette_256;

  975. 

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

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

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

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

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

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

  982.                     }

  983. 

  984.                 } else {

  985. 

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

  987.                     color_start = get_be32(pb);

  988.                     color_count = get_be16(pb);

  989.                     color_end = get_be16(pb);

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

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

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

  993.                          * up front */

  994.                         get_byte(pb);

  995.                         get_byte(pb);

  996.                         r = get_byte(pb);

  997.                         get_byte(pb);

  998.                         g = get_byte(pb);

  999.                         get_byte(pb);

  1000.                         b = get_byte(pb);

  1001.                         get_byte(pb);

  1002.                         c->palette_control.palette[j] =

  1003.                             (r << 16) | (g << 8) | (b);

  1004.                     }

  1005.                 }

  1006. 

  1007.                 st->codec->palctrl = &c->palette_control;

  1008.                 st->codec->palctrl->palette_changed = 1;

  1009.             } else

  1010.                 st->codec->palctrl = NULL;

  1011. 

  1012.             a.size = size;

  1013. 	    mov_read_default(c, pb, a);

  1014. #endif

  1015. 	} else {

  1016.             st->codec->codec_id = codec_get_id(mov_audio_tags, format);

  1017. 	    if(st->codec->codec_id==CODEC_ID_AMR_NB || st->codec->codec_id==CODEC_ID_AMR_WB) //from TS26.244

  1018. 	    {

  1019. #ifdef DEBUG

  1020.                av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");

  1021. #endif

  1022.                get_be32(pb);get_be32(pb); //Reserved_8

  1023.                get_be16(pb);//Reserved_2

  1024.                get_be16(pb);//Reserved_2

  1025.                get_be32(pb);//Reserved_4

  1026.                get_be16(pb);//TimeScale

  1027.                get_be16(pb);//Reserved_2

  1028. 

  1029.                 //AMRSpecificBox.(10 bytes)

  1030.                

  1031.                get_be32(pb); //size

  1032.                get_be32(pb); //type=='damr'

  1033.                get_be32(pb); //vendor

  1034.                get_byte(pb); //decoder version

  1035.                get_be16(pb); //mode_set

  1036.                get_byte(pb); //mode_change_period

  1037.                get_byte(pb); //frames_per_sample

  1038. 

  1039.                st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames

  1040.                if(st->codec->codec_id==CODEC_ID_AMR_NB)

  1041.                {

  1042.                    st->codec->sample_rate=8000;

  1043.                    st->codec->channels=1;

  1044.                }

  1045.                else //AMR-WB

  1046.                {

  1047.                    st->codec->sample_rate=16000;

  1048.                    st->codec->channels=1;

  1049.                }

  1050.                st->codec->bits_per_sample=16;

  1051.                st->codec->bit_rate=0; /*It is not possible to tell this before we have 

  1052.                                        an audio frame and even then every frame can be different*/

  1053. 	    }

  1054.             else if( st->codec->codec_tag == MKTAG( 'm', 'p', '4', 's' ))

  1055.             {

  1056.                 //This is some stuff for the hint track, lets ignore it!

  1057.                 //Do some mp4 auto detect.

  1058.                 c->mp4=1;

  1059.                 size-=(16);

  1060.                 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/

  1061.             }

  1062.             else if( st->codec->codec_tag == MKTAG( 'm', 'p', '4', 'a' ))

  1063.             {

  1064.                 MOV_atom_t a;

  1065.                 int mp4_version;

  1066. 

  1067.                 /* Handle mp4 audio tag */

  1068.                 mp4_version=get_be16(pb);/*version*/

  1069.                 get_be16(pb); /*revesion*/

  1070.                 get_be32(pb);

  1071.                 st->codec->channels = get_be16(pb); /* channels */

  1072.                 st->codec->bits_per_sample = get_be16(pb); /* bits per sample */

  1073.                 get_be32(pb);

  1074.                 st->codec->sample_rate = get_be16(pb); /* sample rate, not always correct */

  1075.                 if(st->codec->sample_rate == 1) //nonsese rate? -> ignore

  1076.                     st->codec->sample_rate= 0;

  1077. 

  1078.                 get_be16(pb);

  1079.                 c->mp4=1;

  1080.                 

  1081.                 if(mp4_version==1)

  1082.                 {

  1083.                     url_fskip(pb,16);

  1084.                     a.size=size-(16+20+16);

  1085.                 }

  1086.                 else

  1087.                     a.size=size-(16+20);

  1088. 

  1089.                 a.offset=url_ftell(pb);

  1090.                                 

  1091.                 mov_read_default(c, pb, a);

  1092. 

  1093.                 /* Get correct sample rate from extradata */

  1094.                 if(st->codec->extradata_size) {

  1095.                    const int samplerate_table[] = {

  1096.                      96000, 88200, 64000, 48000, 44100, 32000, 

  1097.                      24000, 22050, 16000, 12000, 11025, 8000,

  1098.                      7350, 0, 0, 0

  1099.                    };

  1100.                    unsigned char *px = st->codec->extradata;

  1101.                    // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels

  1102.                    int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);

  1103.                    st->codec->sample_rate = samplerate_table[samplerate_index];

  1104.                    st->codec->channels = (px[1] >> 3) & 15;

  1105.                 }

  1106.             }

  1107.             else if( st->codec->codec_tag == MKTAG( 'a', 'l', 'a', 'c' ))

  1108.             {

  1109.                 /* Handle alac audio tag + special extradata */

  1110.                 get_be32(pb); /* version */

  1111.                 get_be32(pb);

  1112.                 st->codec->channels = get_be16(pb); /* channels */

  1113.                 st->codec->bits_per_sample = get_be16(pb); /* bits per sample */

  1114.                 get_be32(pb);

  1115.                 st->codec->sample_rate = get_be16(pb);

  1116.                 get_be16(pb);

  1117. 

  1118.                 /* fetch the 36-byte extradata needed for alac decoding */

  1119.                 st->codec->extradata_size = 36;

  1120.                 st->codec->extradata = (uint8_t*) 

  1121.                     av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  1122.                 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);

  1123.             }

  1124. 	    else if(size>=(16+20))

  1125. 	    {//16 bytes read, reading atleast 20 more

  1126.                 uint16_t version;

  1127. #ifdef DEBUG

  1128.                 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);

  1129. #endif

  1130.                 version = get_be16(pb); /* version */

  1131.                 get_be16(pb); /* revision level */

  1132.                 get_be32(pb); /* vendor */

  1133. 

  1134.                 st->codec->channels = get_be16(pb);		/* channel count */

  1135. 	        st->codec->bits_per_sample = get_be16(pb);	/* sample size */

  1136. 

  1137.                 /* handle specific s8 codec */

  1138.                 get_be16(pb); /* compression id = 0*/

  1139.                 get_be16(pb); /* packet size = 0 */

  1140. 

  1141.                 st->codec->sample_rate = ((get_be32(pb) >> 16));

  1142. 	        //av_log(NULL, AV_LOG_DEBUG, "CODECID %d  %d  %.4s\n", st->codec->codec_id, CODEC_ID_PCM_S16BE, (char*)&format);

  1143. 

  1144. 	        switch (st->codec->codec_id) {

  1145. 	        case CODEC_ID_PCM_S16BE:

  1146. 		    if (st->codec->bits_per_sample == 8)

  1147. 		        st->codec->codec_id = CODEC_ID_PCM_S8;

  1148.                     /* fall */

  1149. 	        case CODEC_ID_PCM_U8:

  1150. 		    st->codec->bit_rate = st->codec->sample_rate * 8;

  1151. 		    break;

  1152. 	        default:

  1153.                     ;

  1154. 	        }

  1155. 

  1156.                 //Read QT version 1 fields. In version 0 theese dont exist

  1157. #ifdef DEBUG

  1158.                 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);

  1159.                 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));

  1160. #endif

  1161.                 if((version==1) && size>=(16+20+16))

  1162.                 {

  1163.                     get_be32(pb); /* samples per packet */

  1164.                     get_be32(pb); /* bytes per packet */

  1165.                     get_be32(pb); /* bytes per frame */

  1166.                     get_be32(pb); /* bytes per sample */

  1167.                     if(size>(16+20+16))

  1168.                     {

  1169.                         //Optional, additional atom-based fields

  1170.                         MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };

  1171. #ifdef DEBUG

  1172.                         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 ),

  1173.                             (format >> 0) & 0xff,

  1174.                             (format >> 8) & 0xff,

  1175.                             (format >> 16) & 0xff,

  1176.                             (format >> 24) & 0xff);

  1177. #endif

  1178.                         mov_read_default(c, pb, a);

  1179.                     }

  1180.                 }

  1181.                 else

  1182.                 {

  1183.                     //We should be down to 0 bytes here, but lets make sure.

  1184.                     size-=(16+20);

  1185. #ifdef DEBUG

  1186.                     if(size>0)

  1187.                         av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));

  1188. #endif

  1189.                     url_fskip(pb, size);

  1190.                 }

  1191.             }

  1192.             else

  1193.             {

  1194.                 size-=16;

  1195.                 //Unknown size, but lets do our best and skip the rest.

  1196. #ifdef DEBUG

  1197.                 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);

  1198. #endif

  1199.                 url_fskip(pb, size);

  1200.             }

  1201.         }

  1202.     }

  1203.     

  1204.     if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) {

  1205.         st->codec->sample_rate= sc->time_scale;

  1206.     }

  1207. 

  1208.     return 0;

  1209. }

  1210. 

  1211. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1212. {

  1213.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1214.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1215.     unsigned int i, entries;

  1216. 

  1217.     print_atom("stsc", atom);

  1218. 

  1219.     get_byte(pb); /* version */

  1220.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1221. 

  1222.     entries = get_be32(pb);

  1223.     

  1224.     if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))

  1225.         return -1;

  1226.     

  1227. #ifdef DEBUG

  1228. av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1229. #endif

  1230.     sc->sample_to_chunk_sz = entries;

  1231.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1232.     if (!sc->sample_to_chunk)

  1233.         return -1;

  1234.     for(i=0; i<entries; i++) {

  1235.         sc->sample_to_chunk[i].first = get_be32(pb);

  1236.         sc->sample_to_chunk[i].count = get_be32(pb);

  1237.         sc->sample_to_chunk[i].id = get_be32(pb);

  1238. #ifdef DEBUG

  1239. /*        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); */

  1240. #endif

  1241.     }

  1242.     return 0;

  1243. }

  1244. 

  1245. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1246. {

  1247.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1248.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1249.     unsigned int i, entries;

  1250. 

  1251.     print_atom("stss", atom);

  1252. 

  1253.     get_byte(pb); /* version */

  1254.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1255. 

  1256.     entries = get_be32(pb);

  1257.     

  1258.     if(entries >= UINT_MAX / sizeof(long))

  1259.         return -1;

  1260.     

  1261.     sc->keyframe_count = entries;

  1262. #ifdef DEBUG

  1263.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);

  1264. #endif

  1265.     sc->keyframes = (long*) av_malloc(entries * sizeof(long));

  1266.     if (!sc->keyframes)

  1267.         return -1;

  1268.     for(i=0; i<entries; i++) {

  1269.         sc->keyframes[i] = get_be32(pb);

  1270. #ifdef DEBUG

  1271. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */

  1272. #endif

  1273.     }

  1274.     return 0;

  1275. }

  1276. 

  1277. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1278. {

  1279.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1280.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1281.     unsigned int i, entries;

  1282. 

  1283.     print_atom("stsz", atom);

  1284. 

  1285.     get_byte(pb); /* version */

  1286.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1287. 

  1288.     sc->sample_size = get_be32(pb);

  1289.     entries = get_be32(pb);

  1290.     if(entries >= UINT_MAX / sizeof(long))

  1291.         return -1;

  1292. 

  1293.     sc->sample_count = entries;

  1294. #ifdef DEBUG

  1295.     av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1296. #endif

  1297.     if(sc->sample_size)

  1298.         return 0; /* there isn't any table following */

  1299.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1300.     if (!sc->sample_sizes)

  1301.         return -1;

  1302.     for(i=0; i<entries; i++) {

  1303.         sc->sample_sizes[i] = get_be32(pb);

  1304. #ifdef DEBUG

  1305.         av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);

  1306. #endif

  1307.     }

  1308.     return 0;

  1309. }

  1310. 

  1311. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1312. {

  1313.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1314.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1315.     unsigned int i, entries;

  1316.     int64_t duration=0;

  1317.     int64_t total_sample_count=0;

  1318. 

  1319.     print_atom("stts", atom);

  1320. 

  1321.     get_byte(pb); /* version */

  1322.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1323.     entries = get_be32(pb);

  1324.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1325.         return -1;

  1326. 

  1327.     c->streams[c->fc->nb_streams-1]->stts_count = entries;

  1328.     c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));

  1329. 

  1330. #ifdef DEBUG

  1331. av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1332. #endif

  1333.     for(i=0; i<entries; i++) {

  1334.         int sample_duration;

  1335.         int sample_count;

  1336. 

  1337.         sample_count=get_be32(pb);

  1338.         sample_duration = get_be32(pb);

  1339.         c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;

  1340.         c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;

  1341. 

  1342. #ifdef DEBUG

  1343.         av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1344. #endif

  1345.         duration+=sample_duration*sample_count;

  1346.         total_sample_count+=sample_count;

  1347.     }

  1348. 

  1349.     st->nb_frames= total_sample_count;

  1350.     if(duration)

  1351.         st->duration= duration;

  1352.     return 0;

  1353. }

  1354. 

  1355. static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1356. {

  1357. //    AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1358.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1359.     unsigned int i, entries;

  1360. 

  1361.     print_atom("ctts", atom);

  1362. 

  1363.     get_byte(pb); /* version */

  1364.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1365.     entries = get_be32(pb);

  1366.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1367.         return -1;

  1368. 

  1369.     c->streams[c->fc->nb_streams-1]->ctts_count = entries;

  1370.     c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));

  1371. 

  1372. // #ifdef DEBUG

  1373. av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);

  1374. // #endif

  1375.     for(i=0; i<entries; i++) {

  1376.         c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);

  1377.         c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);

  1378.     }

  1379.     return 0;

  1380. }

  1381. 

  1382. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1383. {

  1384.     AVStream *st;

  1385.     MOVStreamContext *sc;

  1386. 

  1387.     print_atom("trak", atom);

  1388. 

  1389.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1390.     if (!st) return -2;

  1391.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1392.     if (!sc) {

  1393. 	av_free(st);

  1394.         return -1;

  1395.     }

  1396. 

  1397.     sc->sample_to_chunk_index = -1;

  1398.     st->priv_data = sc;

  1399.     st->codec->codec_type = CODEC_TYPE_MOV_OTHER;

  1400.     st->start_time = 0; /* XXX: check */

  1401.     c->streams[c->fc->nb_streams-1] = sc;

  1402. 

  1403.     return mov_read_default(c, pb, atom);

  1404. }

  1405. 

  1406. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1407. {

  1408.     AVStream *st;

  1409. 

  1410.     print_atom("tkhd", atom);

  1411. 

  1412.     st = c->fc->streams[c->fc->nb_streams-1];

  1413. 

  1414.     get_byte(pb); /* version */

  1415. 

  1416.     get_byte(pb); get_byte(pb);

  1417.     get_byte(pb); /* flags */

  1418.     /*

  1419.     MOV_TRACK_ENABLED 0x0001

  1420.     MOV_TRACK_IN_MOVIE 0x0002

  1421.     MOV_TRACK_IN_PREVIEW 0x0004

  1422.     MOV_TRACK_IN_POSTER 0x0008

  1423.     */

  1424. 

  1425.     get_be32(pb); /* creation time */

  1426.     get_be32(pb); /* modification time */

  1427.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1428.     get_be32(pb); /* reserved */

  1429.     st->start_time = 0; /* check */

  1430.     get_be32(pb); /* highlevel (considering edits) duration in movie timebase */

  1431.     get_be32(pb); /* reserved */

  1432.     get_be32(pb); /* reserved */

  1433. 

  1434.     get_be16(pb); /* layer */

  1435.     get_be16(pb); /* alternate group */

  1436.     get_be16(pb); /* volume */

  1437.     get_be16(pb); /* reserved */

  1438. 

  1439.     url_fskip(pb, 36); /* display matrix */

  1440. 

  1441.     /* those are fixed-point */

  1442.     /*st->codec->width =*/ get_be32(pb) >> 16; /* track width */

  1443.     /*st->codec->height =*/ get_be32(pb) >> 16; /* track height */

  1444. 

  1445.     return 0;

  1446. }

  1447. 

  1448. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1449. /* like the files created with Adobe Premiere 5.0, for samples see */

  1450. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

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

  1452. {

  1453.     int err;

  1454. 

  1455. #ifdef DEBUG

  1456.     print_atom("wide", atom);

  1457.     debug_indent++;

  1458. #endif

  1459.     if (atom.size < 8)

  1460.         return 0; /* continue */

  1461.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1462.         url_fskip(pb, atom.size - 4);

  1463.         return 0;

  1464.     }

  1465.     atom.type = get_le32(pb);

  1466.     atom.offset += 8;

  1467.     atom.size -= 8;

  1468.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1469.         url_fskip(pb, atom.size);

  1470.         return 0;

  1471.     }

  1472.     err = mov_read_mdat(c, pb, atom);

  1473. #ifdef DEBUG

  1474.     debug_indent--;

  1475. #endif

  1476.     return err;

  1477. }

  1478. 

  1479. 

  1480. #ifdef CONFIG_ZLIB

  1481. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1482. {

  1483.     return -1;

  1484. }

  1485. 

  1486. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1487. {

  1488.     ByteIOContext ctx;

  1489.     uint8_t *cmov_data;

  1490.     uint8_t *moov_data; /* uncompressed data */

  1491.     long cmov_len, moov_len;

  1492.     int ret;

  1493. 

  1494.     print_atom("cmov", atom);

  1495. 

  1496.     get_be32(pb); /* dcom atom */

  1497.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1498.         return -1;

  1499.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1500.         av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");

  1501.         return -1;

  1502.     }

  1503.     get_be32(pb); /* cmvd atom */

  1504.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1505.         return -1;

  1506.     moov_len = get_be32(pb); /* uncompressed size */

  1507.     cmov_len = atom.size - 6 * 4;

  1508. 

  1509.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1510.     if (!cmov_data)

  1511.         return -1;

  1512.     moov_data = (uint8_t *) av_malloc(moov_len);

  1513.     if (!moov_data) {

  1514.         av_free(cmov_data);

  1515.         return -1;

  1516.     }

  1517.     get_buffer(pb, cmov_data, cmov_len);

  1518.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1519.         return -1;

  1520.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1521.         return -1;

  1522.     ctx.buf_end = ctx.buffer + moov_len;

  1523.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1524.     atom.offset = 0;

  1525.     atom.size = moov_len;

  1526. #ifdef DEBUG

  1527.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1528. #endif

  1529.     ret = mov_read_default(c, &ctx, atom);

  1530.     av_free(moov_data);

  1531.     av_free(cmov_data);

  1532. 

  1533.     return ret;

  1534. }

  1535. #endif

  1536. 

  1537. /* edit list atom */

  1538. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1539. {

  1540.   int i, edit_count;

  1541.   print_atom("elst", atom);

  1542. 

  1543.   get_byte(pb); /* version */

  1544.   get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1545.   edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */

  1546.   

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

  1548.     get_be32(pb); /* Track duration */

  1549.     get_be32(pb); /* Media time */

  1550.     get_be32(pb); /* Media rate */

  1551.   }

  1552. #ifdef DEBUG

  1553.   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);

  1554. #endif

  1555.   return 0;

  1556. }

  1557. 

  1558. static const MOVParseTableEntry mov_default_parse_table[] = {

  1559. /* mp4 atoms */

  1560. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1561. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1562. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1563. { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */

  1564. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1565. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1566. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1567. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1568. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1569. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1570. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1571. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1572. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1573. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1574. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1575. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1576. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1577. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1578. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1579. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1580. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1581. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1582. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1583. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1584. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1585. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1586. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1587. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },

  1588. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1589. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1590. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC }, 

  1591. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1592. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1593. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1594. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1595. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1596. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1597. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1598. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1599. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1600. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1601. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1602. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1603. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1604. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1605. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1606. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },

  1607. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1608. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1609. /* extra mp4 */

  1610. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1611. /* QT atoms */

  1612. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1613. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1614. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1615. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1616. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1617. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1618. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1619. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1620. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1621. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1622. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1623. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1624. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1625. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1626. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1627. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1628. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1629. #ifdef CONFIG_ZLIB

  1630. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1631. #else

  1632. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1633. #endif

  1634. { 0L, mov_read_leaf }

  1635. };

  1636. 

  1637. static void mov_free_stream_context(MOVStreamContext *sc)

  1638. {

  1639.     if(sc) {

  1640.         av_freep(&sc->chunk_offsets);

  1641.         av_freep(&sc->sample_to_chunk);

  1642.         av_freep(&sc->sample_sizes);

  1643.         av_freep(&sc->keyframes);

  1644.         av_freep(&sc->stts_data);        

  1645.         av_freep(&sc->ctts_data);        

  1646.         av_freep(&sc);

  1647.     }

  1648. }

  1649. 

  1650. static inline uint32_t mov_to_tag(uint8_t *buf)

  1651. {

  1652.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1653. }

  1654. 

  1655. static inline uint32_t to_be32(uint8_t *buf)

  1656. {

  1657.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1658. }

  1659. 

  1660. /* XXX: is it sufficient ? */

  1661. static int mov_probe(AVProbeData *p)

  1662. {

  1663.     unsigned int offset;

  1664.     uint32_t tag;

  1665.     int score = 0;

  1666. 

  1667.     /* check file header */

  1668.     if (p->buf_size <= 12)

  1669.         return 0;

  1670.     offset = 0;

  1671.     for(;;) {

  1672.         /* ignore invalid offset */

  1673.         if ((offset + 8) > (unsigned int)p->buf_size)

  1674.             return score;

  1675.         tag = mov_to_tag(p->buf + offset + 4);

  1676.         switch(tag) {

  1677.         /* check for obvious tags */

  1678.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1679.         case MKTAG( 'm', 'd', 'a', 't' ):

  1680.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1681.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1682.             return AVPROBE_SCORE_MAX;

  1683.         /* those are more common words, so rate then a bit less */

  1684.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1685.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1686.         case MKTAG( 'j', 'u', 'n', 'k' ):

  1687.         case MKTAG( 'p', 'i', 'c', 't' ):

  1688.             return AVPROBE_SCORE_MAX - 5;

  1689.         case MKTAG( 'f', 't', 'y', 'p' ):

  1690.         case MKTAG( 's', 'k', 'i', 'p' ):

  1691.         case MKTAG( 'u', 'u', 'i', 'd' ):

  1692.             offset = to_be32(p->buf+offset) + offset;

  1693.             /* if we only find those cause probedata is too small at least rate them */

  1694.             score = AVPROBE_SCORE_MAX - 50;

  1695.             break;

  1696.         default:

  1697.             /* unrecognized tag */

  1698.             return score;

  1699.         }

  1700.     }

  1701.     return score;

  1702. }

  1703. 

  1704. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1705. {

  1706.     MOVContext *mov = (MOVContext *) s->priv_data;

  1707.     ByteIOContext *pb = &s->pb;

  1708.     int i, j, nb, err;

  1709.     MOV_atom_t atom = { 0, 0, 0 };

  1710. 

  1711.     mov->fc = s;

  1712.     mov->parse_table = mov_default_parse_table;

  1713. #if 0

  1714.     /* XXX: I think we should auto detect */

  1715.     if(s->iformat->name[1] == 'p')

  1716.         mov->mp4 = 1;

  1717. #endif

  1718.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1719. 	atom.size = url_fsize(pb);

  1720.     else

  1721. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1722. 

  1723. #ifdef DEBUG

  1724.     av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);

  1725. #endif

  1726. 

  1727.     /* check MOV header */

  1728.     err = mov_read_default(mov, pb, atom);

  1729.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1730. 	av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1731. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1732. 	return -1;

  1733.     }

  1734. #ifdef DEBUG

  1735.     av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1736. #endif

  1737.     /* some cleanup : make sure we are on the mdat atom */

  1738.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1739.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1740. 

  1741.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1742. 

  1743. #ifdef DEBUG

  1744.     av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1745. #endif

  1746. 

  1747. #ifdef DEBUG

  1748.     av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);

  1749. #endif

  1750.     mov->total_streams = nb = s->nb_streams;

  1751. 

  1752. #if 1

  1753.     for(i=0; i<s->nb_streams;) {

  1754.         if(s->streams[i]->codec->codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1755.             av_free(s->streams[i]);

  1756.             for(j=i+1; j<s->nb_streams; j++)

  1757.                 s->streams[j-1] = s->streams[j];

  1758.             s->nb_streams--;

  1759.         } else

  1760.             i++;

  1761.     }

  1762.     for(i=0; i<s->nb_streams;i++) {

  1763.         MOVStreamContext *sc;

  1764.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1765.         sc->ffindex = i;

  1766.         sc->is_ff_stream = 1;

  1767.     }

  1768. #endif

  1769. #ifdef DEBUG

  1770.     av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);

  1771. #endif

  1772.     return 0;

  1773. }

  1774. 

  1775. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1776. /* XXX:remove useless commented code sometime */

  1777. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1778. {

  1779.     MOVContext *mov = (MOVContext *) s->priv_data;

  1780.     MOVStreamContext *sc;

  1781.     int64_t offset = INT64_MAX;

  1782.     int64_t best_dts = INT64_MAX;

  1783.     int i, a, b, m;

  1784.     int size;

  1785.     int idx;

  1786.     size = 0x0FFFFFFF;

  1787. 

  1788. #ifdef MOV_SPLIT_CHUNKS

  1789.     if (mov->partial) {

  1790. 	sc = mov->partial;

  1791. 	idx = sc->sample_to_chunk_index;

  1792. 

  1793.         if (idx < 0) return 0;

  1794. #ifdef DEBUG

  1795.         fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);

  1796. #endif

  1797.         //size = sc->sample_sizes[sc->current_sample];

  1798.         // that ain't working...

  1799.         //size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1800.         size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1801. 

  1802.         sc->current_sample++;

  1803.         sc->left_in_chunk--;

  1804. 

  1805.         if (sc->left_in_chunk <= 0)

  1806.             mov->partial = 0;

  1807.         offset = mov->next_chunk_offset;

  1808.         /* extract the sample */

  1809. 

  1810.         goto readchunk;

  1811.     }

  1812. #endif

  1813. 

  1814. again:

  1815.     sc = 0;

  1816.     if(offset == INT64_MAX)

  1817.         best_dts= INT64_MAX;

  1818.     for(i=0; i<mov->total_streams; i++) {

  1819. 	MOVStreamContext *msc = mov->streams[i];

  1820. 

  1821.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){

  1822.             if (msc->sample_to_time_index < msc->stts_count && mov->ni) {

  1823.                 int64_t dts;

  1824.                 int index= msc->sample_to_time_index;

  1825.                 int sample= msc->sample_to_time_sample;

  1826.                 int time= msc->sample_to_time_time;

  1827.                 int duration = msc->stts_data[index].duration;

  1828.                 int count = msc->stts_data[index].count;

  1829.                 if (sample + count < msc->current_sample) {

  1830.                     sample += count;

  1831.                     time   += count*duration;

  1832.                     index ++;

  1833.                     duration = msc->stts_data[index].duration;

  1834.                 }

  1835.                 dts = time + (msc->current_sample-1 - sample) * (int64_t)duration;

  1836.                 dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale);

  1837. //                av_log(NULL, AV_LOG_DEBUG, "%d %Ld %Ld %Ld \n", i, dts, best_dts, offset);

  1838.                 if(dts < best_dts){

  1839.                     best_dts= dts;

  1840.                     sc = msc;

  1841.                     offset = msc->chunk_offsets[msc->next_chunk];

  1842.                 }

  1843.             }else{

  1844.             //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));

  1845.                 if ((msc->chunk_offsets[msc->next_chunk] < offset)) {

  1846.                     sc = msc;

  1847.                     offset = msc->chunk_offsets[msc->next_chunk];

  1848.                     //av_log(NULL, AV_LOG_DEBUG, "SELETED  %Ld  i:%d\n", offset, i);

  1849.                 }

  1850.             }

  1851.         }

  1852.     }

  1853.     if (!sc || offset==INT64_MAX)

  1854. 	return -1;

  1855. 

  1856.     sc->next_chunk++;

  1857. 

  1858.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1859.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1860.         mov->next_chunk_offset = offset;

  1861.     }

  1862. 

  1863. //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1864.     if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {

  1865.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1866.         mov->next_chunk_offset = offset;

  1867. 	offset = INT64_MAX;

  1868.         goto again;

  1869.     }

  1870. 

  1871.     /* now get the chunk size... */

  1872. 

  1873.     for(i=0; i<mov->total_streams; i++) {

  1874. 	MOVStreamContext *msc = mov->streams[i];

  1875. 	if ((msc->next_chunk < msc->chunk_count)

  1876.             && msc->chunk_offsets[msc->next_chunk] - offset < size

  1877.             && msc->chunk_offsets[msc->next_chunk] > offset)

  1878. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1879.     }

  1880. 

  1881. #ifdef MOV_MINOLTA_FIX

  1882.     //Make sure that size is according to sample_size (Needed by .mov files 

  1883.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1884.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1885.     //but I have no such movies

  1886.     if (sc->sample_size > 0) { 

  1887.         int foundsize=0;

  1888.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1889.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )

  1890.             {

  1891. 		// I can't figure out why for PCM audio sample_size is always 1

  1892. 		// (it should actually be channels*bits_per_second/8) but it is.

  1893. 		AVCodecContext* cod = s->streams[sc->ffindex]->codec;

  1894.                 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))

  1895. 		    foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;

  1896. 		else

  1897. 		    foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1898.             }

  1899. #ifdef DEBUG

  1900.             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);

  1901. #endif

  1902.         }

  1903.         if( (foundsize>0) && (foundsize<size) )

  1904.         {

  1905. #ifdef DEBUG

  1906.             /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/

  1907. #endif

  1908.             size=foundsize;

  1909.         }

  1910.     }

  1911. #endif //MOV_MINOLTA_FIX

  1912. 

  1913.     idx = sc->sample_to_chunk_index;

  1914.     if (idx + 1 < sc->sample_to_chunk_sz && sc->next_chunk >= sc->sample_to_chunk[idx + 1].first)

  1915.         idx++;

  1916.     sc->sample_to_chunk_index = idx;

  1917. #ifdef MOV_SPLIT_CHUNKS

  1918.     /* split chunks into samples */

  1919.     if (sc->sample_size == 0 || sc->sample_size > 100) {

  1920.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1921. 	    mov->partial = sc;

  1922.             /* we'll have to get those samples before next chunk */

  1923.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1924.             size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1925.         }

  1926. 

  1927.         sc->current_sample++;

  1928.     }else if(idx + 1 < sc->sample_to_chunk_sz){

  1929.         sc->current_sample += sc->sample_size * sc->sample_to_chunk[idx].count;

  1930.     }

  1931. #endif

  1932. 

  1933. readchunk:

  1934. #ifdef DEBUG

  1935.     av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);

  1936. #endif

  1937.     if(size == 0x0FFFFFFF)

  1938.         size = mov->mdat_size + mov->mdat_offset - offset;

  1939.     if(size < 0)

  1940.         return -1;

  1941.     if(size == 0)

  1942.         return -1;

  1943.     url_fseek(&s->pb, offset, SEEK_SET);

  1944. 

  1945.     av_get_packet(&s->pb, pkt, size);

  1946.     pkt->stream_index = sc->ffindex;

  1947.     

  1948.     // If the keyframes table exists, mark any samples that are in the table as key frames.

  1949.     // If no table exists, treat very sample as a key frame.

  1950.     if (sc->keyframes) {        

  1951.         a = 0;

  1952.         b = sc->keyframe_count - 1;

  1953.         

  1954.         while (a < b) {

  1955.             m = (a + b + 1) >> 1;

  1956.             if (sc->keyframes[m] > sc->current_sample) {

  1957.                 b = m - 1;

  1958.             } else {

  1959.                 a = m;

  1960.             }    

  1961.         }

  1962.         

  1963.         if (sc->keyframes[a] == sc->current_sample)

  1964.             pkt->flags |= PKT_FLAG_KEY;

  1965.     }

  1966.     else

  1967.         pkt->flags |= PKT_FLAG_KEY;

  1968. 

  1969. #ifdef DEBUG

  1970. /*

  1971.     av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);

  1972.     for(i=0; i<8; i++)

  1973.         av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);

  1974.     for(i=0; i<8; i++)

  1975.         av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);

  1976.     av_log(NULL, AV_LOG_DEBUG, "\n");

  1977. */

  1978. #endif

  1979. 

  1980.     mov->next_chunk_offset = offset + size;

  1981.     

  1982.     /* find the corresponding dts */	 

  1983.     if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {	 

  1984.       unsigned int count;

  1985.       uint64_t dts, pts;

  1986.       unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;

  1987.       count = sc->stts_data[sc->sample_to_time_index].count;

  1988.       if ((sc->sample_to_time_sample + count) < sc->current_sample) {	 

  1989.         sc->sample_to_time_sample += count;	 

  1990.         sc->sample_to_time_time   += count*duration;	 

  1991.         sc->sample_to_time_index ++;	 

  1992.         duration = sc->stts_data[sc->sample_to_time_index].duration;

  1993.       }	 

  1994.       dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;

  1995.         /* find the corresponding pts */

  1996.         if (sc->sample_to_ctime_index < sc->ctts_count) {

  1997.             int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  1998.             int count = sc->ctts_data[sc->sample_to_ctime_index].count;

  1999. 

  2000.             if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {

  2001.                 sc->sample_to_ctime_sample += count;

  2002.                 sc->sample_to_ctime_index ++;

  2003.                 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  2004.             }

  2005.             pts = dts + duration;

  2006.         }else

  2007.             pts = dts;

  2008.         pkt->pts = pts;

  2009.         pkt->dts = dts;

  2010. #ifdef DEBUG

  2011.     av_log(NULL, AV_LOG_DEBUG, "stream #%d smp #%ld dts = %lld pts = %lld (smp:%ld time:%lld idx:%d ent:%d count:%d dur:%d)\n"

  2012.       , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts

  2013.       , sc->sample_to_time_sample

  2014.       , sc->sample_to_time_time

  2015.       , sc->sample_to_time_index

  2016.       , sc->stts_count

  2017.       , count

  2018.       , duration);

  2019. #endif

  2020.     }

  2021. 

  2022.     return 0;

  2023. }

  2024. 

  2025. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  2026. /**

  2027.  * Seek method based on the one described in the Appendix C of QTFileFormat.pdf

  2028.  */

  2029. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)

  2030. {

  2031.     MOVContext* mov = (MOVContext *) s->priv_data;

  2032.     MOVStreamContext* sc;

  2033.     int32_t i, a, b, m;

  2034.     int64_t start_time;

  2035.     int32_t seek_sample, sample;

  2036.     int32_t duration;

  2037.     int32_t count;

  2038.     int32_t chunk;

  2039.     int32_t left_in_chunk;

  2040.     int64_t chunk_file_offset;

  2041.     int64_t sample_file_offset;

  2042.     int32_t first_chunk_sample;

  2043.     int32_t sample_to_chunk_idx;

  2044.     int sample_to_time_index;	 

  2045.     long sample_to_time_sample = 0;	 

  2046.     uint64_t sample_to_time_time = 0;      

  2047.     int mov_idx;

  2048. 

  2049.     // Find the corresponding mov stream

  2050.     for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)

  2051.         if (mov->streams[mov_idx]->ffindex == stream_index)

  2052.             break;

  2053.     if (mov_idx == mov->total_streams) {

  2054.         av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);

  2055.         return -1;

  2056.     }

  2057.     sc = mov->streams[mov_idx];

  2058. 

  2059.     // Step 1. Find the edit that contains the requested time (elst)

  2060.     if (sc->edit_count) {

  2061.         // FIXME should handle edit list

  2062.         av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);

  2063.         return -1;

  2064.     }

  2065. 

  2066.     // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */

  2067. #ifdef DEBUG

  2068.   av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);

  2069. #endif

  2070.     start_time = 0; // FIXME use elst atom

  2071.     sample = 1; // sample are 0 based in table

  2072. #ifdef DEBUG

  2073.     av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);

  2074. #endif

  2075.     for (i = 0; i < sc->stts_count; i++) {

  2076.         count = sc->stts_data[i].count;

  2077.         duration = sc->stts_data[i].duration;

  2078. //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);                

  2079. //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);        

  2080.         if ((start_time + count*duration) > sample_time) {

  2081.             sample_to_time_time = start_time;	 

  2082.             sample_to_time_index = i;	 

  2083.             sample_to_time_sample = sample;         

  2084.             sample += (sample_time - start_time) / duration;

  2085.             break;

  2086.         }

  2087.         sample += count;

  2088.         start_time += count * duration;

  2089.     }   

  2090.     sample_to_time_time = start_time;	 

  2091.     sample_to_time_index = i;       

  2092.     /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom

  2093.        is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */

  2094. 

  2095. #ifdef DEBUG

  2096.     av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);

  2097. #endif

  2098.     if (sample > sc->sample_count) {

  2099.         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);

  2100.         return -1;

  2101.     }

  2102. 

  2103.     // Step 3. Find the prior sync. sample using the Sync sample atom (stss)

  2104.     if (sc->keyframes) {

  2105.         a = 0;

  2106.         b = sc->keyframe_count - 1;

  2107.         while (a < b) {

  2108.             m = (a + b + 1) >> 1;

  2109.             if (sc->keyframes[m] > sample) {

  2110.                 b = m - 1;

  2111.             } else {

  2112.                 a = m;

  2113.             }

  2114. #ifdef DEBUG

  2115.          // 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);

  2116. #endif

  2117.         }

  2118.         // for low latency prob: always use the previous keyframe, just uncomment the next line

  2119.         // if (a) a--;

  2120.         seek_sample = sc->keyframes[a];

  2121.     }

  2122.     else

  2123.         seek_sample = sample; // else all samples are key frames

  2124. #ifdef DEBUG

  2125.     av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);

  2126. #endif

  2127. 

  2128.     // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)

  2129.     for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {

  2130.         b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;

  2131.         if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))

  2132.             break;

  2133.         first_chunk_sample += b;

  2134.     }

  2135.     chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;

  2136.     left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;

  2137.     first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;

  2138.     sample_to_chunk_idx = i;

  2139. #ifdef DEBUG

  2140.     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);

  2141. #endif

  2142. 

  2143.     // Step 5. Find the offset of the chunk using the chunk offset atom

  2144.     if (!sc->chunk_offsets) {

  2145.         av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");

  2146.         return -1;

  2147.     }

  2148.     if (chunk > sc->chunk_count) {

  2149.         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);

  2150.         return -1;

  2151.     }

  2152.     chunk_file_offset = sc->chunk_offsets[chunk - 1];

  2153. #ifdef DEBUG

  2154.     av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);

  2155. #endif

  2156. 

  2157.     // Step 6. Find the byte offset within the chunk using the sample size atom

  2158.     sample_file_offset = chunk_file_offset;

  2159.     if (sc->sample_size)

  2160.         sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;

  2161.     else {

  2162.         for (i = 0; i < (seek_sample - first_chunk_sample); i++) {

  2163.         sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];

  2164.         }

  2165.     }

  2166. #ifdef DEBUG

  2167.     av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);

  2168. #endif

  2169. 

  2170.     // Step 6. Update the parser

  2171.     mov->partial = sc;

  2172.     mov->next_chunk_offset = sample_file_offset;

  2173.     // Update current stream state

  2174.     sc->current_sample = seek_sample - 1;  // zero based

  2175.     sc->left_in_chunk = left_in_chunk;

  2176.     sc->next_chunk = chunk; // +1 -1 (zero based)

  2177.     sc->sample_to_chunk_index = sample_to_chunk_idx;

  2178. 

  2179.     // Update other streams    

  2180.     for (i = 0; i<mov->total_streams; i++) {

  2181.         MOVStreamContext *msc;

  2182.         if (i == mov_idx) continue;

  2183.         // Find the nearest 'next' chunk

  2184.         msc = mov->streams[i];

  2185.         a = 0;

  2186.         b = msc->chunk_count - 1;

  2187.         while (a < b) {

  2188.             m = (a + b + 1) >> 1;

  2189.             if (msc->chunk_offsets[m] > chunk_file_offset) {

  2190.                 b = m - 1;

  2191.             } else {

  2192.                 a = m;

  2193.             }

  2194. #ifdef DEBUG            

  2195. /*            av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"

  2196.             , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m],  i); */

  2197. #endif                  

  2198.         }

  2199.         msc->next_chunk = a;

  2200.         if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))

  2201.             msc->next_chunk ++;

  2202. #ifdef DEBUG        

  2203.         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]);

  2204. #endif        

  2205.         // Compute sample count and index in the sample_to_chunk table (what a pity)

  2206.         msc->sample_to_chunk_index = 0;

  2207.         msc->current_sample = 0;

  2208.         for(;  msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)

  2209.             && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {

  2210.             msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \

  2211.             * msc->sample_to_chunk[msc->sample_to_chunk_index].count;

  2212.         }

  2213.         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;

  2214.         msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;

  2215.         // Find corresponding position in stts (used later to compute dts)	 

  2216.         sample = 0;	 

  2217.         start_time = 0;	 

  2218.         for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {	 

  2219.             count = msc->stts_data[msc->sample_to_time_index].count;

  2220.             duration = msc->stts_data[msc->sample_to_time_index].duration;

  2221.             if ((sample + count - 1) > msc->current_sample) {	 

  2222.                 msc->sample_to_time_time = start_time;	 

  2223.                 msc->sample_to_time_sample = sample;	 

  2224.                 break;	 

  2225.             }	 

  2226.             sample += count;	 

  2227.             start_time += count * duration;	 

  2228.         }

  2229.         sample = 0;

  2230.         for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {

  2231.             count = msc->ctts_data[msc->sample_to_ctime_index].count;

  2232.             duration = msc->ctts_data[msc->sample_to_ctime_index].duration;

  2233.             if ((sample + count - 1) > msc->current_sample) {

  2234.                 msc->sample_to_ctime_sample = sample;

  2235.                 break;

  2236.             }

  2237.             sample += count;

  2238.         }       

  2239. #ifdef DEBUG        

  2240.         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);

  2241. #endif        

  2242.     }                

  2243.     return 0;

  2244. }

  2245. #endif

  2246. 

  2247. static int mov_read_close(AVFormatContext *s)

  2248. {

  2249.     int i;

  2250.     MOVContext *mov = (MOVContext *) s->priv_data;

  2251.     for(i=0; i<mov->total_streams; i++)

  2252.         mov_free_stream_context(mov->streams[i]);

  2253.     /* free color tabs */

  2254.     for(i=0; i<mov->ctab_size; i++)

  2255. 	av_freep(&mov->ctab[i]);

  2256.     av_freep(&mov->ctab);

  2257.     return 0;

  2258. }

  2259. 

  2260. static AVInputFormat mov_iformat = {

  2261.     "mov,mp4,m4a,3gp,3g2",

  2262.     "QuickTime/MPEG4 format",

  2263.     sizeof(MOVContext),

  2264.     mov_probe,

  2265.     mov_read_header,

  2266.     mov_read_packet,

  2267.     mov_read_close,

  2268. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  2269.     mov_read_seek,

  2270. #endif    

  2271. };

  2272. 

  2273. int mov_init(void)

  2274. {

  2275.     av_register_input_format(&mov_iformat);

  2276.     return 0;

  2277. }