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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_NONE, 0 },

  122. };

  123. 

  124. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  135. 

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

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

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

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

  140. /* MP4 tags */

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

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

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

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

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

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

  147.     { CODEC_ID_NONE, 0 },

  148. };

  149. 

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

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

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

  153.  */

  154. 

  155. typedef struct MOV_sample_to_chunk_tbl {

  156.     long first;

  157.     long count;

  158.     long id;

  159. } MOV_sample_to_chunk_tbl;

  160. 

  161. typedef struct {

  162.     uint32_t type;

  163.     int64_t offset;

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

  165. } MOV_atom_t;

  166. 

  167. typedef struct {

  168.     int seed;

  169.     int flags;

  170.     int size;

  171.     void* clrs;

  172. } MOV_ctab_t;

  173. 

  174. typedef struct {

  175.     uint8_t  version;

  176.     uint32_t flags; // 24bit

  177. 

  178.     /* 0x03 ESDescrTag */

  179.     uint16_t es_id;

  180. #define MP4ODescrTag			0x01

  181. #define MP4IODescrTag			0x02

  182. #define MP4ESDescrTag			0x03

  183. #define MP4DecConfigDescrTag		0x04

  184. #define MP4DecSpecificDescrTag		0x05

  185. #define MP4SLConfigDescrTag		0x06

  186. #define MP4ContentIdDescrTag		0x07

  187. #define MP4SupplContentIdDescrTag	0x08

  188. #define MP4IPIPtrDescrTag		0x09

  189. #define MP4IPMPPtrDescrTag		0x0A

  190. #define MP4IPMPDescrTag			0x0B

  191. #define MP4RegistrationDescrTag		0x0D

  192. #define MP4ESIDIncDescrTag		0x0E

  193. #define MP4ESIDRefDescrTag		0x0F

  194. #define MP4FileIODescrTag		0x10

  195. #define MP4FileODescrTag		0x11

  196. #define MP4ExtProfileLevelDescrTag	0x13

  197. #define MP4ExtDescrTagsStart		0x80

  198. #define MP4ExtDescrTagsEnd		0xFE

  199.     uint8_t  stream_priority;

  200. 

  201.     /* 0x04 DecConfigDescrTag */

  202.     uint8_t  object_type_id;

  203.     uint8_t  stream_type;

  204.     /* XXX: really streamType is

  205.      * only 6bit, followed by:

  206.      * 1bit  upStream

  207.      * 1bit  reserved

  208.      */

  209.     uint32_t buffer_size_db; // 24

  210.     uint32_t max_bitrate;

  211.     uint32_t avg_bitrate;

  212. 

  213.     /* 0x05 DecSpecificDescrTag */

  214.     uint8_t  decoder_cfg_len;

  215.     uint8_t *decoder_cfg;

  216. 

  217.     /* 0x06 SLConfigDescrTag */

  218.     uint8_t  sl_config_len;

  219.     uint8_t *sl_config;

  220. } MOV_esds_t;

  221. 

  222. struct MOVParseTableEntry;

  223. 

  224. typedef struct Time2Sample{

  225.     int count;

  226.     int duration;

  227. }Time2Sample;

  228. 

  229. typedef struct MOVStreamContext {

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

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

  232.     long next_chunk;

  233.     long chunk_count;

  234.     int64_t *chunk_offsets;

  235.     int stts_count;

  236.     Time2Sample *stts_data;

  237.     int ctts_count;

  238.     Time2Sample *ctts_data;

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

  240.     long sample_to_chunk_sz;

  241.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  242.     long sample_to_chunk_index;

  243.     int sample_to_time_index;	 

  244.     long sample_to_time_sample;	 

  245.     uint64_t sample_to_time_time;    

  246.     int sample_to_ctime_index;

  247.     int sample_to_ctime_sample;

  248.     long sample_size;

  249.     long sample_count;

  250.     long *sample_sizes;

  251.     long keyframe_count;

  252.     long *keyframes;

  253.     int time_scale;

  254.     long current_sample;

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

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

  257.     unsigned int header_len;

  258.     uint8_t *header_data;

  259.     MOV_esds_t esds;

  260. } MOVStreamContext;

  261. 

  262. typedef struct MOVContext {

  263.     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) */

  264.     AVFormatContext *fc;

  265.     int time_scale;

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

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

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

  269.     int64_t mdat_size;

  270.     int64_t mdat_offset;

  271.     int total_streams;

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

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

  274.      */

  275.     MOVStreamContext *streams[MAX_STREAMS];

  276. 

  277.     int64_t next_chunk_offset;

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

  279.     int ctab_size;

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

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

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

  283. 

  284.     AVPaletteControl palette_control;

  285. } MOVContext;

  286. 

  287. 

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

  289. 

  290. /* those functions parse an atom */

  291. /* return code:

  292.  1: found what I wanted, exit

  293.  0: continue to parse next atom

  294.  -1: error occured, exit

  295.  */

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

  297. 

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

  299. typedef struct MOVParseTableEntry {

  300.     uint32_t type;

  301.     mov_parse_function func;

  302. } MOVParseTableEntry;

  303. 

  304. #ifdef DEBUG

  305. /*

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

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

  308.  */

  309. static int debug_indent = 0;

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

  311. {

  312.     unsigned int tag, i;

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

  314.     i=debug_indent;

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

  316.     while(i--)

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

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

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

  320.            str, tag & 0xff,

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

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

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

  324.            (unsigned int)atom.offset,

  325. 	   (unsigned int)atom.size);

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

  327. }

  328. #else

  329. #define print_atom(a,b)

  330. #endif

  331. 

  332. 

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

  334. {

  335.     print_atom("leaf", atom);

  336. 

  337.     if (atom.size>1)

  338.         url_fskip(pb, atom.size);

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

  340.     return 0;

  341. }

  342. 

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

  344. {

  345.     int64_t total_size = 0;

  346.     MOV_atom_t a;

  347.     int i;

  348.     int err = 0;

  349. 

  350. #ifdef DEBUG

  351.     print_atom("default", atom);

  352.     debug_indent++;

  353. #endif

  354. 

  355.     a.offset = atom.offset;

  356. 

  357.     if (atom.size < 0)

  358. 	atom.size = 0x7fffffffffffffffLL;

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

  360. 	a.size = atom.size;

  361. 	a.type=0L;

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

  363. 	    a.size = get_be32(pb);

  364.             a.type = get_le32(pb);

  365.         }

  366. 	total_size += 8;

  367.         a.offset += 8;

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

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

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

  371.             a.offset += 8;

  372.             total_size += 8;

  373.         }

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

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

  376. 	    if (a.size <= 8)

  377.                 break;

  378. 	}

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

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

  381. 	    /* empty */;

  382. 

  383. 	a.size -= 8;

  384.         

  385.         if(a.size < 0)

  386.             break;

  387.         

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

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

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

  391. #ifdef DEBUG

  392.             print_atom("unknown", a);

  393. #endif

  394.             url_fskip(pb, a.size);

  395. 	} else {

  396. #ifdef DEBUG

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

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

  399. #endif

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

  401. 	}

  402. 

  403. 	a.offset += a.size;

  404.         total_size += a.size;

  405.     }

  406. 

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

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

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

  410.     }

  411. 

  412. #ifdef DEBUG

  413.     debug_indent--;

  414. #endif

  415.     return err;

  416. }

  417. 

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

  419. {

  420. #if 1

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

  422. #else

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

  424.     unsigned int len;

  425.     MOV_ctab_t *t;

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

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

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

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

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

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

  432.     if (len > 0) {

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

  434. 	if (t->clrs)

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

  436.     }

  437. #endif

  438. 

  439.     return 0;

  440. }

  441. 

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

  443. {

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

  445.     int len = 0;

  446.     uint32_t type;

  447.     uint32_t ctype;

  448. 

  449.     print_atom("hdlr", atom);

  450. 

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

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

  453. 

  454.     /* component type */

  455.     ctype = get_le32(pb);

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

  457. 

  458. #ifdef DEBUG

  459.     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);

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

  461. #endif

  462. #ifdef DEBUG

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

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

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

  466.             puts("hdlr: vide");

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

  468.             puts("hdlr: soun");

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

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

  471.             puts("hdlr: vide");

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

  473.             puts("hdlr: soun");

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

  475.             puts("hdlr: odsm");

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

  477.             puts("hdlr: sdsm");

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

  479. #endif

  480. 

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

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

  483.         c->mp4 = 0;

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

  485.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  487.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  490.         c->mp4 = 1;

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

  492.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  494.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  495.     }

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

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

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

  499. 

  500.     if(atom.size <= 24)

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

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

  503.     /* component name */

  504. 

  505.     if(c->mp4) {

  506.         /* .mp4: C string */

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

  508.     } else {

  509.         /* .mov: PASCAL string */

  510. #ifdef DEBUG

  511.         char* buf;

  512. #endif

  513.         len = get_byte(pb);

  514. #ifdef DEBUG

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

  516. 	if (buf) {

  517. 	    get_buffer(pb, buf, len);

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

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

  520. 	    av_free(buf);

  521. 	} else

  522. #endif

  523. 	    url_fskip(pb, len);

  524.     }

  525. 

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

  527.     return 0;

  528. }

  529. 

  530. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  531. {

  532.     int len = 0;

  533.     int count = 4;

  534.     while (count--) {

  535.         int c = get_byte(pb);

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

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

  538. 	    break;

  539.     }

  540.     return len;

  541. }

  542. 

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

  544. {

  545.     int len;

  546.     *tag = get_byte(pb);

  547.     len = mov_mp4_read_descr_len(pb);

  548. #ifdef DEBUG

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

  550. #endif

  551.     return len;

  552. }

  553. 

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

  555. {

  556.     unsigned int val;

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

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

  559.     val |= get_byte(s);

  560.     return val;

  561. }

  562. 

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

  564. {

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

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

  567.     int64_t start_pos = url_ftell(pb);

  568.     int tag, len;

  569. 

  570.     print_atom("esds", atom);

  571. 

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

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

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

  575.     if (tag == MP4ESDescrTag) {

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

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

  578.     } else

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

  580. 

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

  582.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  588. 

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

  590. 	//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);

  591. 	if (tag == MP4DecSpecificDescrTag) {

  592. #ifdef DEBUG

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

  594. #endif

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

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

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

  598. 		st->codec.extradata_size = len;

  599. 	    }

  600. 	}

  601.     }

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

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

  604.     return 0;

  605. }

  606. 

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

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

  609. {

  610.     print_atom("mdat", atom);

  611. 

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

  613.         return 0;

  614.     c->found_mdat=1;

  615.     c->mdat_offset = atom.offset;

  616.     c->mdat_size = atom.size;

  617.     if(c->found_moov)

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

  619.     url_fskip(pb, atom.size);

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

  621. }

  622. 

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

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

  625. {

  626.     int err;

  627. 

  628.     print_atom("moov", atom);

  629. 

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

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

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

  633.     c->found_moov=1;

  634.     if(c->found_mdat)

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

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

  637. }

  638. 

  639. 

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

  641. {

  642.     print_atom("mdhd", atom);

  643. 

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

  645. 

  646.     get_byte(pb); get_byte(pb);

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

  648. 

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

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

  651. 

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

  653. 

  654. #ifdef DEBUG

  655.     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 */

  656. #endif

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

  658. 

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

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

  661. 

  662.     return 0;

  663. }

  664. 

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

  666. {

  667.     print_atom("mvhd", atom);

  668. 

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

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

  671. 

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

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

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

  675. #ifdef DEBUG

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

  677. #endif

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

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

  680. 

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

  682. 

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

  684. 

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

  686. 

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

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

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

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

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

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

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

  694. 

  695.     return 0;

  696. }

  697. 

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

  699. {

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

  701. 

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

  703.         return -1;

  704.     

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

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

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

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

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

  710. 

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

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

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

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

  715.     } else

  716. 	url_fskip(pb, atom.size);

  717. 

  718.     return 0;

  719. }

  720. 

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

  722. {

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

  724. 

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

  726.         return -1;

  727. 

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

  729. 

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

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

  732. 

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

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

  735.     } else

  736. 	url_fskip(pb, atom.size);

  737. 

  738.     return 0;

  739. }

  740. 

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

  742. {

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

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

  745.     unsigned int i, entries;

  746. 

  747.     print_atom("stco", atom);

  748. 

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

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

  751. 

  752.     entries = get_be32(pb);

  753.         

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

  755.         return -1;

  756.  

  757.     sc->chunk_count = entries;

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

  759.     if (!sc->chunk_offsets)

  760.         return -1;

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

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

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

  764.         }

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

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

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

  768.         }

  769.     } else

  770.         return -1;

  771. #ifdef DEBUG

  772. /*

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

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

  775.     }

  776. */

  777. #endif

  778.     return 0;

  779. }

  780. 

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

  782. {

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

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

  785.     int entries, frames_per_sample;

  786.     uint32_t format;

  787.     uint8_t codec_name[32];

  788. 

  789.     /* for palette traversal */

  790.     int color_depth;

  791.     int color_start;

  792.     int color_count;

  793.     int color_end;

  794.     int color_index;

  795.     int color_dec;

  796.     int color_greyscale;

  797.     unsigned char *color_table;

  798.     int j;

  799.     unsigned char r, g, b;

  800. 

  801.     print_atom("stsd", atom);

  802. 

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

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

  805. 

  806.     entries = get_be32(pb);

  807. 

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

  809.         enum CodecID id;

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

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

  812. 

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

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

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

  816. 

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

  818.         id = codec_get_id(mov_video_tags, format);

  819.         if (id >= 0) {

  820.             AVCodec *codec;

  821. 	    codec = avcodec_find_decoder(id);

  822.             if (codec)

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

  824.         }

  825. #ifdef DEBUG

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

  827.                size,

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

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

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

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

  832.                st->codec.codec_type);

  833. #endif

  834. 	st->codec.codec_tag = format;

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

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

  837.             st->codec.codec_id = id;

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

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

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

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

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

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

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

  845. #if 1

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

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

  848.                    we ignore this info */

  849.                 st->codec.width = 0;

  850.                 st->codec.height = 0;

  851.             }

  852. #endif

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

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

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

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

  857. #ifdef DEBUG

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

  859. #endif

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

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

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

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

  864.         }

  865. 

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

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

  868. 

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

  870.             st->codec.frame_rate      = 25;

  871.             st->codec.frame_rate_base = 1;

  872. */

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

  874. #if 0

  875. 	    while (size >= 8) {

  876. 		MOV_atom_t a;

  877.                 int64_t start_pos;

  878. 

  879. 		a.size = get_be32(pb);

  880. 		a.type = get_le32(pb);

  881. 		size -= 8;

  882. #ifdef DEBUG

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

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

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

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

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

  888. 		       a.size, size);

  889. #endif

  890.                 start_pos = url_ftell(pb);

  891. 

  892. 		switch(a.type) {

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

  894.                     {

  895.                         int tag, len;

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

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

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

  899.                         if (tag == 0x03) {

  900.                             /* MP4ESDescrTag */

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

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

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

  904.                             if (tag != 0x04)

  905.                                 goto fail;

  906.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  912.                             if (tag != 0x05)

  913.                                 goto fail;

  914.                             /* MP4DecSpecificDescrTag */

  915. #ifdef DEBUG

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

  917. #endif

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

  919.                             if (sc->header_data) {

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

  921. 				sc->header_len = len;

  922.                             }

  923.                         }

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

  925.                     }

  926.                     break;

  927.                 default:

  928.                     break;

  929.                 }

  930. 	    fail:

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

  932. 		if (atom.size > 8) {

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

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

  935. 		    size -= atom.size - 8;

  936. 		}

  937. 	    }

  938.             if (size > 0) {

  939.                 /* unknown extension */

  940.                 url_fskip(pb, size);

  941.             }

  942. #else

  943. 

  944.             /* figure out the palette situation */

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

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

  947. 

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

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

  950.                 (color_depth == 8)) {

  951. 

  952.                 if (color_greyscale) {

  953. 

  954.                     /* compute the greyscale palette */

  955.                     color_count = 1 << color_depth;

  956.                     color_index = 255;

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

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

  959.                         r = g = b = color_index;

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

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

  962.                         color_index -= color_dec;

  963.                         if (color_index < 0)

  964.                             color_index = 0;

  965.                     }

  966. 

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

  968. 

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

  970.                     color_count = 1 << color_depth;

  971.                     if (color_depth == 2)

  972.                         color_table = ff_qt_default_palette_4;

  973.                     else if (color_depth == 4)

  974.                         color_table = ff_qt_default_palette_16;

  975.                     else

  976.                         color_table = ff_qt_default_palette_256;

  977. 

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

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

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

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

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

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

  984.                     }

  985. 

  986.                 } else {

  987. 

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

  989.                     color_start = get_be32(pb);

  990.                     color_count = get_be16(pb);

  991.                     color_end = get_be16(pb);

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

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

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

  995.                          * up front */

  996.                         get_byte(pb);

  997.                         get_byte(pb);

  998.                         r = get_byte(pb);

  999.                         get_byte(pb);

  1000.                         g = get_byte(pb);

  1001.                         get_byte(pb);

  1002.                         b = get_byte(pb);

  1003.                         get_byte(pb);

  1004.                         c->palette_control.palette[j] =

  1005.                             (r << 16) | (g << 8) | (b);

  1006.                     }

  1007.                 }

  1008. 

  1009.                 st->codec.palctrl = &c->palette_control;

  1010.                 st->codec.palctrl->palette_changed = 1;

  1011.             } else

  1012.                 st->codec.palctrl = NULL;

  1013. 

  1014.             a.size = size;

  1015. 	    mov_read_default(c, pb, a);

  1016. #endif

  1017. 	} else {

  1018.             st->codec.codec_id = codec_get_id(mov_audio_tags, format);

  1019. 	    if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244

  1020. 	    {

  1021. #ifdef DEBUG

  1022.                av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");

  1023. #endif

  1024.                get_be32(pb);get_be32(pb); //Reserved_8

  1025.                get_be16(pb);//Reserved_2

  1026.                get_be16(pb);//Reserved_2

  1027.                get_be32(pb);//Reserved_4

  1028.                get_be16(pb);//TimeScale

  1029.                get_be16(pb);//Reserved_2

  1030. 

  1031.                 //AMRSpecificBox.(10 bytes)

  1032.                

  1033.                get_be32(pb); //size

  1034.                get_be32(pb); //type=='damr'

  1035.                get_be32(pb); //vendor

  1036.                get_byte(pb); //decoder version

  1037.                get_be16(pb); //mode_set

  1038.                get_byte(pb); //mode_change_period

  1039.                get_byte(pb); //frames_per_sample

  1040. 

  1041.                st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames

  1042.                if(st->codec.codec_id==CODEC_ID_AMR_NB)

  1043.                {

  1044.                    st->codec.sample_rate=8000;

  1045.                    st->codec.channels=1;

  1046.                }

  1047.                else //AMR-WB

  1048.                {

  1049.                    st->codec.sample_rate=16000;

  1050.                    st->codec.channels=1;

  1051.                }

  1052.                st->codec.bits_per_sample=16;

  1053.                st->codec.bit_rate=0; /*It is not possible to tell this before we have 

  1054.                                        an audio frame and even then every frame can be different*/

  1055. 	    }

  1056.             else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))

  1057.             {

  1058.                 //This is some stuff for the hint track, lets ignore it!

  1059.                 //Do some mp4 auto detect.

  1060.                 c->mp4=1;

  1061.                 size-=(16);

  1062.                 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/

  1063.             }

  1064.             else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))

  1065.             {

  1066.                 MOV_atom_t a;

  1067.                 int mp4_version;

  1068. 

  1069.                 /* Handle mp4 audio tag */

  1070.                 mp4_version=get_be16(pb);/*version*/

  1071.                 get_be16(pb); /*revesion*/

  1072.                 get_be32(pb);

  1073.                 st->codec.channels = get_be16(pb); /* channels */

  1074.                 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */

  1075.                 get_be32(pb);

  1076.                 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */

  1077.                 get_be16(pb);

  1078.                 c->mp4=1;

  1079.                 

  1080.                 if(mp4_version==1)

  1081.                 {

  1082.                     url_fskip(pb,16);

  1083.                     a.size=size-(16+20+16);

  1084.                 }

  1085.                 else

  1086.                     a.size=size-(16+20);

  1087. 

  1088.                 a.offset=url_ftell(pb);

  1089.                                 

  1090.                 mov_read_default(c, pb, a);

  1091. 

  1092.                 /* Get correct sample rate from extradata */

  1093.                 if(st->codec.extradata_size) {

  1094.                    const int samplerate_table[] = {

  1095.                      96000, 88200, 64000, 48000, 44100, 32000, 

  1096.                      24000, 22050, 16000, 12000, 11025, 8000,

  1097.                      7350, 0, 0, 0

  1098.                    };

  1099.                    unsigned char *px = st->codec.extradata;

  1100.                    // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels

  1101.                    int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);

  1102.                    st->codec.sample_rate = samplerate_table[samplerate_index];

  1103.                    st->codec.channels = (px[1] >> 3) & 15;

  1104.                 }

  1105.             }

  1106.             else if( st->codec.codec_tag == MKTAG( 'a', 'l', 'a', 'c' ))

  1107.             {

  1108.                 /* Handle alac audio tag + special extradata */

  1109.                 get_be32(pb); /* version */

  1110.                 get_be32(pb);

  1111.                 st->codec.channels = get_be16(pb); /* channels */

  1112.                 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */

  1113.                 get_be32(pb);

  1114.                 st->codec.sample_rate = get_be16(pb);

  1115.                 get_be16(pb);

  1116. 

  1117.                 /* fetch the 36-byte extradata needed for alac decoding */

  1118.                 st->codec.extradata_size = 36;

  1119.                 st->codec.extradata = (uint8_t*) 

  1120.                     av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  1121.                 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);

  1122.             }

  1123. 	    else if(size>=(16+20))

  1124. 	    {//16 bytes read, reading atleast 20 more

  1125.                 uint16_t version;

  1126. #ifdef DEBUG

  1127.                 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);

  1128. #endif

  1129.                 version = get_be16(pb); /* version */

  1130.                 get_be16(pb); /* revision level */

  1131.                 get_be32(pb); /* vendor */

  1132. 

  1133.                 st->codec.channels = get_be16(pb);		/* channel count */

  1134. 	        st->codec.bits_per_sample = get_be16(pb);	/* sample size */

  1135. 

  1136.                 /* handle specific s8 codec */

  1137.                 get_be16(pb); /* compression id = 0*/

  1138.                 get_be16(pb); /* packet size = 0 */

  1139. 

  1140.                 st->codec.sample_rate = ((get_be32(pb) >> 16));

  1141. 	        //av_log(NULL, AV_LOG_DEBUG, "CODECID %d  %d  %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);

  1142. 

  1143. 	        switch (st->codec.codec_id) {

  1144. 	        case CODEC_ID_PCM_S16BE:

  1145. 		    if (st->codec.bits_per_sample == 8)

  1146. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  1147.                     /* fall */

  1148. 	        case CODEC_ID_PCM_U8:

  1149. 		    st->codec.bit_rate = st->codec.sample_rate * 8;

  1150. 		    break;

  1151. 	        default:

  1152.                     ;

  1153. 	        }

  1154. 

  1155.                 //Read QT version 1 fields. In version 0 theese dont exist

  1156. #ifdef DEBUG

  1157.                 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);

  1158.                 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));

  1159. #endif

  1160.                 if((version==1) && size>=(16+20+16))

  1161.                 {

  1162.                     get_be32(pb); /* samples per packet */

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

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

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

  1166.                     if(size>(16+20+16))

  1167.                     {

  1168.                         //Optional, additional atom-based fields

  1169.                         MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };

  1170. #ifdef DEBUG

  1171.                         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 ),

  1172.                             (format >> 0) & 0xff,

  1173.                             (format >> 8) & 0xff,

  1174.                             (format >> 16) & 0xff,

  1175.                             (format >> 24) & 0xff);

  1176. #endif

  1177.                         mov_read_default(c, pb, a);

  1178.                     }

  1179.                 }

  1180.                 else

  1181.                 {

  1182.                     //We should be down to 0 bytes here, but lets make sure.

  1183.                     size-=(16+20);

  1184. #ifdef DEBUG

  1185.                     if(size>0)

  1186.                         av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));

  1187. #endif

  1188.                     url_fskip(pb, size);

  1189.                 }

  1190.             }

  1191.             else

  1192.             {

  1193.                 size-=16;

  1194.                 //Unknown size, but lets do our best and skip the rest.

  1195. #ifdef DEBUG

  1196.                 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);

  1197. #endif

  1198.                 url_fskip(pb, size);

  1199.             }

  1200.         }

  1201.     }

  1202. 

  1203.     return 0;

  1204. }

  1205. 

  1206. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1207. {

  1208.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1209.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1210.     unsigned int i, entries;

  1211. 

  1212.     print_atom("stsc", atom);

  1213. 

  1214.     get_byte(pb); /* version */

  1215.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1216. 

  1217.     entries = get_be32(pb);

  1218.     

  1219.     if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))

  1220.         return -1;

  1221.     

  1222. #ifdef DEBUG

  1223. av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1224. #endif

  1225.     sc->sample_to_chunk_sz = entries;

  1226.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1227.     if (!sc->sample_to_chunk)

  1228.         return -1;

  1229.     for(i=0; i<entries; i++) {

  1230.         sc->sample_to_chunk[i].first = get_be32(pb);

  1231.         sc->sample_to_chunk[i].count = get_be32(pb);

  1232.         sc->sample_to_chunk[i].id = get_be32(pb);

  1233. #ifdef DEBUG

  1234. /*        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); */

  1235. #endif

  1236.     }

  1237.     return 0;

  1238. }

  1239. 

  1240. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1241. {

  1242.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1243.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1244.     unsigned int i, entries;

  1245. 

  1246.     print_atom("stss", atom);

  1247. 

  1248.     get_byte(pb); /* version */

  1249.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1250. 

  1251.     entries = get_be32(pb);

  1252.     

  1253.     if(entries >= UINT_MAX / sizeof(long))

  1254.         return -1;

  1255.     

  1256.     sc->keyframe_count = entries;

  1257. #ifdef DEBUG

  1258.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);

  1259. #endif

  1260.     sc->keyframes = (long*) av_malloc(entries * sizeof(long));

  1261.     if (!sc->keyframes)

  1262.         return -1;

  1263.     for(i=0; i<entries; i++) {

  1264.         sc->keyframes[i] = get_be32(pb);

  1265. #ifdef DEBUG

  1266. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */

  1267. #endif

  1268.     }

  1269.     return 0;

  1270. }

  1271. 

  1272. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1273. {

  1274.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1275.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1276.     unsigned int i, entries;

  1277. 

  1278.     print_atom("stsz", atom);

  1279. 

  1280.     get_byte(pb); /* version */

  1281.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1282. 

  1283.     sc->sample_size = get_be32(pb);

  1284.     entries = get_be32(pb);

  1285.     if(entries >= UINT_MAX / sizeof(long))

  1286.         return -1;

  1287. 

  1288.     sc->sample_count = entries;

  1289. #ifdef DEBUG

  1290.     av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1291. #endif

  1292.     if(sc->sample_size)

  1293.         return 0; /* there isn't any table following */

  1294.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1295.     if (!sc->sample_sizes)

  1296.         return -1;

  1297.     for(i=0; i<entries; i++) {

  1298.         sc->sample_sizes[i] = get_be32(pb);

  1299. #ifdef DEBUG

  1300.         av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);

  1301. #endif

  1302.     }

  1303.     return 0;

  1304. }

  1305. 

  1306. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1307. {

  1308.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1309.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1310.     unsigned int i, entries;

  1311.     int64_t duration=0;

  1312.     int64_t total_sample_count=0;

  1313. 

  1314.     print_atom("stts", atom);

  1315. 

  1316.     get_byte(pb); /* version */

  1317.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1318.     entries = get_be32(pb);

  1319.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1320.         return -1;

  1321. 

  1322.     c->streams[c->fc->nb_streams-1]->stts_count = entries;

  1323.     c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));

  1324. 

  1325. #ifdef DEBUG

  1326. av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1327. #endif

  1328.     for(i=0; i<entries; i++) {

  1329.         int sample_duration;

  1330.         int sample_count;

  1331. 

  1332.         sample_count=get_be32(pb);

  1333.         sample_duration = get_be32(pb);

  1334.         c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;

  1335.         c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;

  1336. #ifdef DEBUG

  1337.         av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1338. #endif

  1339.         duration+=sample_duration*sample_count;

  1340.         total_sample_count+=sample_count;

  1341. 

  1342. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1343. 

  1344.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1345.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1346.             st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;

  1347. #ifdef DEBUG

  1348.             av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1349. #endif

  1350.         }

  1351. #endif

  1352.     }

  1353. 

  1354.     /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/

  1355.     if(duration>0)

  1356.     {

  1357.         av_reduce(

  1358.             &st->codec.frame_rate, 

  1359.             &st->codec.frame_rate_base, 

  1360.             c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,

  1361.             duration,

  1362.             INT_MAX

  1363.         );

  1364. 

  1365. #ifdef DEBUG

  1366.         av_log(NULL, AV_LOG_DEBUG, "FRAME RATE average (video or audio)= %f (tot sample count= %i ,tot dur= %i timescale=%d)\n", (float)st->codec.frame_rate/st->codec.frame_rate_base,total_sample_count,duration,c->streams[c->fc->nb_streams-1]->time_scale);

  1367. #endif

  1368.     }

  1369.     else

  1370.     {

  1371.         st->codec.frame_rate_base = 1;

  1372.         st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;

  1373.     }

  1374.     return 0;

  1375. }

  1376. 

  1377. static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1378. {

  1379. //    AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1380.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1381.     unsigned int i, entries;

  1382. 

  1383.     print_atom("ctts", atom);

  1384. 

  1385.     get_byte(pb); /* version */

  1386.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1387.     entries = get_be32(pb);

  1388.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1389.         return -1;

  1390. 

  1391.     c->streams[c->fc->nb_streams-1]->ctts_count = entries;

  1392.     c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));

  1393. 

  1394. // #ifdef DEBUG

  1395. av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);

  1396. // #endif

  1397.     for(i=0; i<entries; i++) {

  1398.         c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);

  1399.         c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);

  1400.     }

  1401.     return 0;

  1402. }

  1403. 

  1404. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1405. {

  1406.     AVStream *st;

  1407.     MOVStreamContext *sc;

  1408. 

  1409.     print_atom("trak", atom);

  1410. 

  1411.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1412.     if (!st) return -2;

  1413.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1414.     if (!sc) {

  1415. 	av_free(st);

  1416.         return -1;

  1417.     }

  1418. 

  1419.     sc->sample_to_chunk_index = -1;

  1420.     st->priv_data = sc;

  1421.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1422.     st->start_time = 0; /* XXX: check */

  1423.     st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;

  1424.     c->streams[c->fc->nb_streams-1] = sc;

  1425. 

  1426.     return mov_read_default(c, pb, atom);

  1427. }

  1428. 

  1429. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1430. {

  1431.     AVStream *st;

  1432. 

  1433.     print_atom("tkhd", atom);

  1434. 

  1435.     st = c->fc->streams[c->fc->nb_streams-1];

  1436. 

  1437.     get_byte(pb); /* version */

  1438. 

  1439.     get_byte(pb); get_byte(pb);

  1440.     get_byte(pb); /* flags */

  1441.     /*

  1442.     MOV_TRACK_ENABLED 0x0001

  1443.     MOV_TRACK_IN_MOVIE 0x0002

  1444.     MOV_TRACK_IN_PREVIEW 0x0004

  1445.     MOV_TRACK_IN_POSTER 0x0008

  1446.     */

  1447. 

  1448.     get_be32(pb); /* creation time */

  1449.     get_be32(pb); /* modification time */

  1450.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1451.     get_be32(pb); /* reserved */

  1452.     st->start_time = 0; /* check */

  1453.     st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */

  1454.     get_be32(pb); /* reserved */

  1455.     get_be32(pb); /* reserved */

  1456. 

  1457.     get_be16(pb); /* layer */

  1458.     get_be16(pb); /* alternate group */

  1459.     get_be16(pb); /* volume */

  1460.     get_be16(pb); /* reserved */

  1461. 

  1462.     url_fskip(pb, 36); /* display matrix */

  1463. 

  1464.     /* those are fixed-point */

  1465.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1466.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1467. 

  1468.     return 0;

  1469. }

  1470. 

  1471. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1472. /* like the files created with Adobe Premiere 5.0, for samples see */

  1473. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1474. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1475. {

  1476.     int err;

  1477. 

  1478. #ifdef DEBUG

  1479.     print_atom("wide", atom);

  1480.     debug_indent++;

  1481. #endif

  1482.     if (atom.size < 8)

  1483.         return 0; /* continue */

  1484.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1485.         url_fskip(pb, atom.size - 4);

  1486.         return 0;

  1487.     }

  1488.     atom.type = get_le32(pb);

  1489.     atom.offset += 8;

  1490.     atom.size -= 8;

  1491.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1492.         url_fskip(pb, atom.size);

  1493.         return 0;

  1494.     }

  1495.     err = mov_read_mdat(c, pb, atom);

  1496. #ifdef DEBUG

  1497.     debug_indent--;

  1498. #endif

  1499.     return err;

  1500. }

  1501. 

  1502. 

  1503. #ifdef CONFIG_ZLIB

  1504. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1505. {

  1506.     return -1;

  1507. }

  1508. 

  1509. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1510. {

  1511.     ByteIOContext ctx;

  1512.     uint8_t *cmov_data;

  1513.     uint8_t *moov_data; /* uncompressed data */

  1514.     long cmov_len, moov_len;

  1515.     int ret;

  1516. 

  1517.     print_atom("cmov", atom);

  1518. 

  1519.     get_be32(pb); /* dcom atom */

  1520.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1521.         return -1;

  1522.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1523.         av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");

  1524.         return -1;

  1525.     }

  1526.     get_be32(pb); /* cmvd atom */

  1527.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1528.         return -1;

  1529.     moov_len = get_be32(pb); /* uncompressed size */

  1530.     cmov_len = atom.size - 6 * 4;

  1531. 

  1532.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1533.     if (!cmov_data)

  1534.         return -1;

  1535.     moov_data = (uint8_t *) av_malloc(moov_len);

  1536.     if (!moov_data) {

  1537.         av_free(cmov_data);

  1538.         return -1;

  1539.     }

  1540.     get_buffer(pb, cmov_data, cmov_len);

  1541.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1542.         return -1;

  1543.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1544.         return -1;

  1545.     ctx.buf_end = ctx.buffer + moov_len;

  1546.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1547.     atom.offset = 0;

  1548.     atom.size = moov_len;

  1549. #ifdef DEBUG

  1550.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1551. #endif

  1552.     ret = mov_read_default(c, &ctx, atom);

  1553.     av_free(moov_data);

  1554.     av_free(cmov_data);

  1555. 

  1556.     return ret;

  1557. }

  1558. #endif

  1559. 

  1560. /* edit list atom */

  1561. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1562. {

  1563.   int i, edit_count;

  1564.   print_atom("elst", atom);

  1565. 

  1566.   get_byte(pb); /* version */

  1567.   get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1568.   edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */

  1569.   

  1570.   for(i=0; i<edit_count; i++){

  1571.     get_be32(pb); /* Track duration */

  1572.     get_be32(pb); /* Media time */

  1573.     get_be32(pb); /* Media rate */

  1574.   }

  1575. #ifdef DEBUG

  1576.   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);

  1577. #endif

  1578.   return 0;

  1579. }

  1580. 

  1581. static const MOVParseTableEntry mov_default_parse_table[] = {

  1582. /* mp4 atoms */

  1583. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1584. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

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

  1586. { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */

  1587. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1588. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1589. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1590. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1591. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1592. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1593. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1594. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1595. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1596. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1597. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1598. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1599. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1600. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1601. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1602. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1603. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1604. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1605. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1606. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1607. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1608. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1609. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1610. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },

  1611. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1612. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1613. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC }, 

  1614. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1615. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1616. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1617. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1618. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1619. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1620. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1621. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1622. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1623. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1624. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1625. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1626. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1627. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1628. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1629. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },

  1630. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1631. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1632. /* extra mp4 */

  1633. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1634. /* QT atoms */

  1635. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1636. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1637. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1638. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1639. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1640. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1641. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1642. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1643. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1644. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1645. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1646. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1647. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1648. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1649. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1650. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1651. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1652. #ifdef CONFIG_ZLIB

  1653. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1654. #else

  1655. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1656. #endif

  1657. { 0L, mov_read_leaf }

  1658. };

  1659. 

  1660. static void mov_free_stream_context(MOVStreamContext *sc)

  1661. {

  1662.     if(sc) {

  1663.         av_freep(&sc->chunk_offsets);

  1664.         av_freep(&sc->sample_to_chunk);

  1665.         av_freep(&sc->sample_sizes);

  1666.         av_freep(&sc->keyframes);

  1667.         av_freep(&sc->header_data);

  1668.         av_freep(&sc->stts_data);        

  1669.         av_freep(&sc->ctts_data);        

  1670.         av_freep(&sc);

  1671.     }

  1672. }

  1673. 

  1674. static inline uint32_t mov_to_tag(uint8_t *buf)

  1675. {

  1676.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1677. }

  1678. 

  1679. static inline uint32_t to_be32(uint8_t *buf)

  1680. {

  1681.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1682. }

  1683. 

  1684. /* XXX: is it sufficient ? */

  1685. static int mov_probe(AVProbeData *p)

  1686. {

  1687.     unsigned int offset;

  1688.     uint32_t tag;

  1689.     int score = 0;

  1690. 

  1691.     /* check file header */

  1692.     if (p->buf_size <= 12)

  1693.         return 0;

  1694.     offset = 0;

  1695.     for(;;) {

  1696.         /* ignore invalid offset */

  1697.         if ((offset + 8) > (unsigned int)p->buf_size)

  1698.             return score;

  1699.         tag = mov_to_tag(p->buf + offset + 4);

  1700.         switch(tag) {

  1701.         /* check for obvious tags */

  1702.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1703.         case MKTAG( 'm', 'd', 'a', 't' ):

  1704.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1705.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1706.             return AVPROBE_SCORE_MAX;

  1707.         /* those are more common words, so rate then a bit less */

  1708.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1709.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1710.         case MKTAG( 'j', 'u', 'n', 'k' ):

  1711.         case MKTAG( 'p', 'i', 'c', 't' ):

  1712.             return AVPROBE_SCORE_MAX - 5;

  1713.         case MKTAG( 'f', 't', 'y', 'p' ):

  1714.         case MKTAG( 's', 'k', 'i', 'p' ):

  1715.         case MKTAG( 'u', 'u', 'i', 'd' ):

  1716.             offset = to_be32(p->buf+offset) + offset;

  1717.             /* if we only find those cause probedata is too small at least rate them */

  1718.             score = AVPROBE_SCORE_MAX - 50;

  1719.             break;

  1720.         default:

  1721.             /* unrecognized tag */

  1722.             return score;

  1723.         }

  1724.     }

  1725.     return score;

  1726. }

  1727. 

  1728. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1729. {

  1730.     MOVContext *mov = (MOVContext *) s->priv_data;

  1731.     ByteIOContext *pb = &s->pb;

  1732.     int i, j, nb, err;

  1733.     MOV_atom_t atom = { 0, 0, 0 };

  1734. 

  1735.     mov->fc = s;

  1736.     mov->parse_table = mov_default_parse_table;

  1737. #if 0

  1738.     /* XXX: I think we should auto detect */

  1739.     if(s->iformat->name[1] == 'p')

  1740.         mov->mp4 = 1;

  1741. #endif

  1742.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1743. 	atom.size = url_filesize(url_fileno(pb));

  1744.     else

  1745. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1746. 

  1747. #ifdef DEBUG

  1748.     av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);

  1749. #endif

  1750. 

  1751.     /* check MOV header */

  1752.     err = mov_read_default(mov, pb, atom);

  1753.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1754. 	av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1755. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1756. 	return -1;

  1757.     }

  1758. #ifdef DEBUG

  1759.     av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1760. #endif

  1761.     /* some cleanup : make sure we are on the mdat atom */

  1762.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1763.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1764. 

  1765.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1766. 

  1767. #ifdef DEBUG

  1768.     av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1769. #endif

  1770. 

  1771. #ifdef DEBUG

  1772.     av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);

  1773. #endif

  1774.     mov->total_streams = nb = s->nb_streams;

  1775. 

  1776. #if 1

  1777.     for(i=0; i<s->nb_streams;) {

  1778.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1779.             av_free(s->streams[i]);

  1780.             for(j=i+1; j<s->nb_streams; j++)

  1781.                 s->streams[j-1] = s->streams[j];

  1782.             s->nb_streams--;

  1783.         } else

  1784.             i++;

  1785.     }

  1786.     for(i=0; i<s->nb_streams;i++) {

  1787.         MOVStreamContext *sc;

  1788.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1789.         sc->ffindex = i;

  1790.         sc->is_ff_stream = 1;

  1791.     }

  1792. #endif

  1793. #ifdef DEBUG

  1794.     av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);

  1795. #endif

  1796.     return 0;

  1797. }

  1798. 

  1799. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1800. /* XXX:remove useless commented code sometime */

  1801. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1802. {

  1803.     MOVContext *mov = (MOVContext *) s->priv_data;

  1804.     MOVStreamContext *sc;

  1805.     int64_t offset = 0x0FFFFFFFFFFFFFFFLL;

  1806.     int i, a, b, m;

  1807.     int size;

  1808.     int idx;

  1809.     size = 0x0FFFFFFF;

  1810. 

  1811. #ifdef MOV_SPLIT_CHUNKS

  1812.     if (mov->partial) {

  1813. 	sc = mov->partial;

  1814. 	idx = sc->sample_to_chunk_index;

  1815. 

  1816.         if (idx < 0) return 0;

  1817. #ifdef DEBUG

  1818.         fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);

  1819. #endif

  1820.         //size = sc->sample_sizes[sc->current_sample];

  1821.         // that ain't working...

  1822.         //size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1823.         size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1824. 

  1825.         sc->current_sample++;

  1826.         sc->left_in_chunk--;

  1827. 

  1828.         if (sc->left_in_chunk <= 0)

  1829.             mov->partial = 0;

  1830.         offset = mov->next_chunk_offset;

  1831.         /* extract the sample */

  1832. 

  1833.         goto readchunk;

  1834.     }

  1835. #endif

  1836. 

  1837. again:

  1838.     sc = 0;

  1839.     for(i=0; i<mov->total_streams; i++) {

  1840. 	MOVStreamContext *msc = mov->streams[i];

  1841. 	//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));

  1842.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1843. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1844. 	    sc = msc;

  1845. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1846. 	    //av_log(NULL, AV_LOG_DEBUG, "SELETED  %Ld  i:%d\n", offset, i);

  1847.         }

  1848.     }

  1849.     if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)

  1850. 	return -1;

  1851. 

  1852.     sc->next_chunk++;

  1853. 

  1854.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1855.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1856.         mov->next_chunk_offset = offset;

  1857.     }

  1858. 

  1859. //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1860.     if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {

  1861.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1862.         mov->next_chunk_offset = offset;

  1863. 	offset = 0x0FFFFFFFFFFFFFFFLL;

  1864.         goto again;

  1865.     }

  1866. 

  1867.     /* now get the chunk size... */

  1868. 

  1869.     for(i=0; i<mov->total_streams; i++) {

  1870. 	MOVStreamContext *msc = mov->streams[i];

  1871. 	if ((msc->next_chunk < msc->chunk_count)

  1872. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1873. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1874.     }

  1875. 

  1876. #ifdef MOV_MINOLTA_FIX

  1877.     //Make sure that size is according to sample_size (Needed by .mov files 

  1878.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1879.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1880.     //but I have no such movies

  1881.     if (sc->sample_size > 0) { 

  1882.         int foundsize=0;

  1883.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1884.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )

  1885.             {

  1886. 		// I can't figure out why for PCM audio sample_size is always 1

  1887. 		// (it should actually be channels*bits_per_second/8) but it is.

  1888. 		AVCodecContext* cod = &s->streams[sc->ffindex]->codec;

  1889.                 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))

  1890. 		    foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;

  1891. 		else

  1892. 		    foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1893.             }

  1894. #ifdef DEBUG

  1895.             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);

  1896. #endif

  1897.         }

  1898.         if( (foundsize>0) && (foundsize<size) )

  1899.         {

  1900. #ifdef DEBUG

  1901.             /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/

  1902. #endif

  1903.             size=foundsize;

  1904.         }

  1905.     }

  1906. #endif //MOV_MINOLTA_FIX

  1907. 

  1908. #ifdef MOV_SPLIT_CHUNKS

  1909.     /* split chunks into samples */

  1910.     if (sc->sample_size == 0) {

  1911.         idx = sc->sample_to_chunk_index;

  1912.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1913.                 && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1914.             idx++;

  1915.         sc->sample_to_chunk_index = idx;

  1916.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1917. 	    mov->partial = sc;

  1918.             /* we'll have to get those samples before next chunk */

  1919.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1920.             size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1921.         }

  1922. 

  1923.         sc->current_sample++;

  1924.     }

  1925. #endif

  1926. 

  1927. readchunk:

  1928. #ifdef DEBUG

  1929.     av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);

  1930. #endif

  1931.     if(size == 0x0FFFFFFF)

  1932.         size = mov->mdat_size + mov->mdat_offset - offset;

  1933.     if(size < 0)

  1934.         return -1;

  1935.     if(size == 0)

  1936.         return -1;

  1937.     url_fseek(&s->pb, offset, SEEK_SET);

  1938. 

  1939.     //av_log(NULL, AV_LOG_DEBUG, "READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1940.     if (sc->header_len > 0) {

  1941.         av_new_packet(pkt, size + sc->header_len);

  1942.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1943.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1944.         /* free header */

  1945.         av_freep(&sc->header_data);

  1946.         sc->header_len = 0;

  1947.     } else {

  1948.         av_new_packet(pkt, size);

  1949.         get_buffer(&s->pb, pkt->data, pkt->size);

  1950.     }

  1951.     pkt->stream_index = sc->ffindex;

  1952.     

  1953.     // If the keyframes table exists, mark any samples that are in the table as key frames.

  1954.     // If no table exists, treat very sample as a key frame.

  1955.     if (sc->keyframes) {        

  1956.         a = 0;

  1957.         b = sc->keyframe_count - 1;

  1958.         

  1959.         while (a < b) {

  1960.             m = (a + b + 1) >> 1;

  1961.             if (sc->keyframes[m] > sc->current_sample) {

  1962.                 b = m - 1;

  1963.             } else {

  1964.                 a = m;

  1965.             }    

  1966.         }

  1967.         

  1968.         if (sc->keyframes[a] == sc->current_sample)

  1969.             pkt->flags |= PKT_FLAG_KEY;

  1970.     }

  1971.     else

  1972.         pkt->flags |= PKT_FLAG_KEY;

  1973. 

  1974. #ifdef DEBUG

  1975. /*

  1976.     av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);

  1977.     for(i=0; i<8; i++)

  1978.         av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);

  1979.     for(i=0; i<8; i++)

  1980.         av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);

  1981.     av_log(NULL, AV_LOG_DEBUG, "\n");

  1982. */

  1983. #endif

  1984. 

  1985.     mov->next_chunk_offset = offset + size;

  1986.     

  1987.     /* find the corresponding dts */	 

  1988.     if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {	 

  1989.       unsigned int count;

  1990.       uint64_t dts, pts;

  1991.       unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;

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

  1993.       if ((sc->sample_to_time_sample + count) < sc->current_sample) {	 

  1994.         sc->sample_to_time_sample += count;	 

  1995.         sc->sample_to_time_time   += count*duration;	 

  1996.         sc->sample_to_time_index ++;	 

  1997.         duration = sc->stts_data[sc->sample_to_time_index].duration;

  1998.       }	 

  1999.       dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;

  2000.         /* find the corresponding pts */

  2001.         if (sc->sample_to_ctime_index < sc->ctts_count) {

  2002.             int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  2003.             int count = sc->ctts_data[sc->sample_to_ctime_index].count;

  2004. 

  2005.             if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {

  2006.                 sc->sample_to_ctime_sample += count;

  2007.                 sc->sample_to_ctime_index ++;

  2008.                 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  2009.             }

  2010.             pts = dts + duration;

  2011.         }else

  2012.             pts = dts;

  2013.         pkt->pts = av_rescale( pts,

  2014.                          (int64_t)s->streams[sc->ffindex]->time_base.den,

  2015.                          (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );

  2016.         pkt->dts = av_rescale( dts,

  2017.                          (int64_t)s->streams[sc->ffindex]->time_base.den,

  2018.                          (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );

  2019. #ifdef DEBUG

  2020.     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"

  2021.       , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts

  2022.       , sc->sample_to_time_sample

  2023.       , sc->sample_to_time_time

  2024.       , sc->sample_to_time_index

  2025.       , sc->stts_count

  2026.       , count

  2027.       , duration);

  2028. #endif

  2029.     }

  2030. 

  2031.     return 0;

  2032. }

  2033. 

  2034. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  2035. /**

  2036.  * Seek method based on the one described in the Appendix C of QTFileFormat.pdf

  2037.  */

  2038. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)

  2039. {

  2040.     MOVContext* mov = (MOVContext *) s->priv_data;

  2041.     MOVStreamContext* sc;

  2042.     int32_t i, a, b, m;

  2043.     int64_t sample_time;

  2044.     int64_t start_time;

  2045.     int32_t seek_sample, sample;

  2046.     int32_t duration;

  2047.     int32_t count;

  2048.     int32_t chunk;

  2049.     int32_t left_in_chunk;

  2050.     int64_t chunk_file_offset;

  2051.     int64_t sample_file_offset;

  2052.     int32_t first_chunk_sample;

  2053.     int32_t sample_to_chunk_idx;

  2054.     int sample_to_time_index;	 

  2055.     long sample_to_time_sample = 0;	 

  2056.     uint64_t sample_to_time_time = 0;      

  2057.     int mov_idx;

  2058. 

  2059.     // Find the corresponding mov stream

  2060.     for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)

  2061.         if (mov->streams[mov_idx]->ffindex == stream_index)

  2062.             break;

  2063.     if (mov_idx == mov->total_streams) {

  2064.         av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);

  2065.         return -1;

  2066.     }

  2067.     sc = mov->streams[mov_idx];

  2068. 

  2069.     // Step 1. Find the edit that contains the requested time (elst)

  2070.     if (sc->edit_count) {

  2071.         // FIXME should handle edit list

  2072.         av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);

  2073.         return -1;

  2074.     }

  2075. 

  2076.     // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */

  2077. #ifdef DEBUG

  2078.   av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);

  2079. #endif

  2080.     // convert timestamp from time_base unit to timescale unit

  2081.     sample_time = av_rescale( timestamp,

  2082.                             (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,

  2083.                             (int64_t)s->streams[stream_index]->time_base.den);

  2084.     start_time = 0; // FIXME use elst atom

  2085.     sample = 1; // sample are 0 based in table

  2086. #ifdef DEBUG

  2087.     av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);

  2088. #endif

  2089.     for (i = 0; i < sc->stts_count; i++) {

  2090.         count = sc->stts_data[i].count;

  2091.         duration = sc->stts_data[i].duration;

  2092. //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);                

  2093. //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);        

  2094.         if ((start_time + count*duration) > sample_time) {

  2095.             sample_to_time_time = start_time;	 

  2096.             sample_to_time_index = i;	 

  2097.             sample_to_time_sample = sample;         

  2098.             sample += (sample_time - start_time) / duration;

  2099.             break;

  2100.         }

  2101.         sample += count;

  2102.         start_time += count * duration;

  2103.     }   

  2104.     sample_to_time_time = start_time;	 

  2105.     sample_to_time_index = i;       

  2106.     /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom

  2107.        is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */

  2108. 

  2109. #ifdef DEBUG

  2110.     av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);

  2111. #endif

  2112.     if (sample > sc->sample_count) {

  2113.         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);

  2114.         return -1;

  2115.     }

  2116. 

  2117.     // Step 3. Find the prior sync. sample using the Sync sample atom (stss)

  2118.     if (sc->keyframes) {

  2119.         a = 0;

  2120.         b = sc->keyframe_count - 1;

  2121.         while (a < b) {

  2122.             m = (a + b + 1) >> 1;

  2123.             if (sc->keyframes[m] > sample) {

  2124.                 b = m - 1;

  2125.             } else {

  2126.                 a = m;

  2127.             }

  2128. #ifdef DEBUG

  2129.          // 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);

  2130. #endif

  2131.         }

  2132.         // for low latency prob: always use the previous keyframe, just uncomment the next line

  2133.         // if (a) a--;

  2134.         seek_sample = sc->keyframes[a];

  2135.     }

  2136.     else

  2137.         seek_sample = sample; // else all samples are key frames

  2138. #ifdef DEBUG

  2139.     av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);

  2140. #endif

  2141. 

  2142.     // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)

  2143.     for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {

  2144.         b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;

  2145.         if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))

  2146.             break;

  2147.         first_chunk_sample += b;

  2148.     }

  2149.     chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;

  2150.     left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;

  2151.     first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;

  2152.     sample_to_chunk_idx = i;

  2153. #ifdef DEBUG

  2154.     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);

  2155. #endif

  2156. 

  2157.     // Step 5. Find the offset of the chunk using the chunk offset atom

  2158.     if (!sc->chunk_offsets) {

  2159.         av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");

  2160.         return -1;

  2161.     }

  2162.     if (chunk > sc->chunk_count) {

  2163.         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);

  2164.         return -1;

  2165.     }

  2166.     chunk_file_offset = sc->chunk_offsets[chunk - 1];

  2167. #ifdef DEBUG

  2168.     av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);

  2169. #endif

  2170. 

  2171.     // Step 6. Find the byte offset within the chunk using the sample size atom

  2172.     sample_file_offset = chunk_file_offset;

  2173.     if (sc->sample_size)

  2174.         sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;

  2175.     else {

  2176.         for (i = 0; i < (seek_sample - first_chunk_sample); i++) {

  2177.         sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];

  2178.         }

  2179.     }

  2180. #ifdef DEBUG

  2181.     av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);

  2182. #endif

  2183. 

  2184.     // Step 6. Update the parser

  2185.     mov->partial = sc;

  2186.     mov->next_chunk_offset = sample_file_offset;

  2187.     // Update current stream state

  2188.     sc->current_sample = seek_sample - 1;  // zero based

  2189.     sc->left_in_chunk = left_in_chunk;

  2190.     sc->next_chunk = chunk; // +1 -1 (zero based)

  2191.     sc->sample_to_chunk_index = sample_to_chunk_idx;

  2192. 

  2193.     // Update other streams    

  2194.     for (i = 0; i<mov->total_streams; i++) {

  2195.         MOVStreamContext *msc;

  2196.         if (i == mov_idx) continue;

  2197.         // Find the nearest 'next' chunk

  2198.         msc = mov->streams[i];

  2199.         a = 0;

  2200.         b = msc->chunk_count - 1;

  2201.         while (a < b) {

  2202.             m = (a + b + 1) >> 1;

  2203.             if (msc->chunk_offsets[m] > chunk_file_offset) {

  2204.                 b = m - 1;

  2205.             } else {

  2206.                 a = m;

  2207.             }

  2208. #ifdef DEBUG            

  2209. /*            av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"

  2210.             , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m],  i); */

  2211. #endif                  

  2212.         }

  2213.         msc->next_chunk = a;

  2214.         if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))

  2215.             msc->next_chunk ++;

  2216. #ifdef DEBUG        

  2217.         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]);

  2218. #endif        

  2219.         // Compute sample count and index in the sample_to_chunk table (what a pity)

  2220.         msc->sample_to_chunk_index = 0;

  2221.         msc->current_sample = 0;

  2222.         for(;  msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)

  2223.             && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {

  2224.             msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \

  2225.             * msc->sample_to_chunk[msc->sample_to_chunk_index].count;

  2226.         }

  2227.         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;

  2228.         msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;

  2229.         // Find corresponding position in stts (used later to compute dts)	 

  2230.         sample = 0;	 

  2231.         start_time = 0;	 

  2232.         for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {	 

  2233.             count = msc->stts_data[msc->sample_to_time_index].count;

  2234.             duration = msc->stts_data[msc->sample_to_time_index].duration;

  2235.             if ((sample + count - 1) > msc->current_sample) {	 

  2236.                 msc->sample_to_time_time = start_time;	 

  2237.                 msc->sample_to_time_sample = sample;	 

  2238.                 break;	 

  2239.             }	 

  2240.             sample += count;	 

  2241.             start_time += count * duration;	 

  2242.         }

  2243.         sample = 0;

  2244.         for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {

  2245.             count = msc->ctts_data[msc->sample_to_ctime_index].count;

  2246.             duration = msc->ctts_data[msc->sample_to_ctime_index].duration;

  2247.             if ((sample + count - 1) > msc->current_sample) {

  2248.                 msc->sample_to_ctime_sample = sample;

  2249.                 break;

  2250.             }

  2251.             sample += count;

  2252.         }       

  2253. #ifdef DEBUG        

  2254.         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);

  2255. #endif        

  2256.     }                

  2257.     return 0;

  2258. }

  2259. #endif

  2260. 

  2261. static int mov_read_close(AVFormatContext *s)

  2262. {

  2263.     int i;

  2264.     MOVContext *mov = (MOVContext *) s->priv_data;

  2265.     for(i=0; i<mov->total_streams; i++)

  2266.         mov_free_stream_context(mov->streams[i]);

  2267.     /* free color tabs */

  2268.     for(i=0; i<mov->ctab_size; i++)

  2269. 	av_freep(&mov->ctab[i]);

  2270.     av_freep(&mov->ctab);

  2271.     return 0;

  2272. }

  2273. 

  2274. static AVInputFormat mov_iformat = {

  2275.     "mov,mp4,m4a,3gp,3g2",

  2276.     "QuickTime/MPEG4 format",

  2277.     sizeof(MOVContext),

  2278.     mov_probe,

  2279.     mov_read_header,

  2280.     mov_read_packet,

  2281.     mov_read_close,

  2282. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  2283.     mov_read_seek,

  2284. #endif    

  2285. };

  2286. 

  2287. int mov_init(void)

  2288. {

  2289.     av_register_input_format(&mov_iformat);

  2290.     return 0;

  2291. }