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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.     MOV_esds_t esds;

  257. } MOVStreamContext;

  258. 

  259. typedef struct MOVContext {

  260.     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) */

  261.     AVFormatContext *fc;

  262.     int time_scale;

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

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

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

  266.     int64_t mdat_size;

  267.     int64_t mdat_offset;

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

  269.     int total_streams;

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

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

  272.      */

  273.     MOVStreamContext *streams[MAX_STREAMS];

  274. 

  275.     int64_t next_chunk_offset;

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

  277.     int ctab_size;

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

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

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

  281. 

  282.     AVPaletteControl palette_control;

  283. } MOVContext;

  284. 

  285. 

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

  287. 

  288. /* those functions parse an atom */

  289. /* return code:

  290.  1: found what I wanted, exit

  291.  0: continue to parse next atom

  292.  -1: error occured, exit

  293.  */

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

  295. 

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

  297. typedef struct MOVParseTableEntry {

  298.     uint32_t type;

  299.     mov_parse_function func;

  300. } MOVParseTableEntry;

  301. 

  302. #ifdef DEBUG

  303. /*

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

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

  306.  */

  307. static int debug_indent = 0;

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

  309. {

  310.     unsigned int tag, i;

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

  312.     i=debug_indent;

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

  314.     while(i--)

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

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

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

  318.            str, tag & 0xff,

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

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

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

  322.            (unsigned int)atom.offset,

  323. 	   (unsigned int)atom.size);

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

  325. }

  326. #else

  327. #define print_atom(a,b)

  328. #endif

  329. 

  330. 

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

  332. {

  333.     print_atom("leaf", atom);

  334. 

  335.     if (atom.size>1)

  336.         url_fskip(pb, atom.size);

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

  338.     return 0;

  339. }

  340. 

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

  342. {

  343.     int64_t total_size = 0;

  344.     MOV_atom_t a;

  345.     int i;

  346.     int err = 0;

  347. 

  348. #ifdef DEBUG

  349.     print_atom("default", atom);

  350.     debug_indent++;

  351. #endif

  352. 

  353.     a.offset = atom.offset;

  354. 

  355.     if (atom.size < 0)

  356. 	atom.size = 0x7fffffffffffffffLL;

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

  358. 	a.size = atom.size;

  359. 	a.type=0L;

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

  361. 	    a.size = get_be32(pb);

  362.             a.type = get_le32(pb);

  363.         }

  364. 	total_size += 8;

  365.         a.offset += 8;

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

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

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

  369.             a.offset += 8;

  370.             total_size += 8;

  371.         }

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

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

  374. 	    if (a.size <= 8)

  375.                 break;

  376. 	}

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

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

  379. 	    /* empty */;

  380. 

  381. 	a.size -= 8;

  382.         

  383.         if(a.size < 0)

  384.             break;

  385.         

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

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

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

  389. #ifdef DEBUG

  390.             print_atom("unknown", a);

  391. #endif

  392.             url_fskip(pb, a.size);

  393. 	} else {

  394. #ifdef DEBUG

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

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

  397. #endif

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

  399. 	}

  400. 

  401. 	a.offset += a.size;

  402.         total_size += a.size;

  403.     }

  404. 

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

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

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

  408.     }

  409. 

  410. #ifdef DEBUG

  411.     debug_indent--;

  412. #endif

  413.     return err;

  414. }

  415. 

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

  417. {

  418. #if 1

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

  420. #else

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

  422.     unsigned int len;

  423.     MOV_ctab_t *t;

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

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

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

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

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

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

  430.     if (len > 0) {

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

  432. 	if (t->clrs)

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

  434.     }

  435. #endif

  436. 

  437.     return 0;

  438. }

  439. 

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

  441. {

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

  443.     int len = 0;

  444.     uint32_t type;

  445.     uint32_t ctype;

  446. 

  447.     print_atom("hdlr", atom);

  448. 

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

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

  451. 

  452.     /* component type */

  453.     ctype = get_le32(pb);

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

  455. 

  456. #ifdef DEBUG

  457.     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);

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

  459. #endif

  460. #ifdef DEBUG

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

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

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

  464.             puts("hdlr: vide");

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

  466.             puts("hdlr: soun");

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

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

  469.             puts("hdlr: vide");

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

  471.             puts("hdlr: soun");

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

  473.             puts("hdlr: odsm");

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

  475.             puts("hdlr: sdsm");

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

  477. #endif

  478. 

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

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

  481.         c->mp4 = 0;

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

  483.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  485.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  488.         c->mp4 = 1;

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

  490.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  492.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  493.     }

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

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

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

  497. 

  498.     if(atom.size <= 24)

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

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

  501.     /* component name */

  502. 

  503.     if(c->mp4) {

  504.         /* .mp4: C string */

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

  506.     } else {

  507.         /* .mov: PASCAL string */

  508. #ifdef DEBUG

  509.         char* buf;

  510. #endif

  511.         len = get_byte(pb);

  512. #ifdef DEBUG

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

  514. 	if (buf) {

  515. 	    get_buffer(pb, buf, len);

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

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

  518. 	    av_free(buf);

  519. 	} else

  520. #endif

  521. 	    url_fskip(pb, len);

  522.     }

  523. 

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

  525.     return 0;

  526. }

  527. 

  528. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  529. {

  530.     int len = 0;

  531.     int count = 4;

  532.     while (count--) {

  533.         int c = get_byte(pb);

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

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

  536. 	    break;

  537.     }

  538.     return len;

  539. }

  540. 

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

  542. {

  543.     int len;

  544.     *tag = get_byte(pb);

  545.     len = mov_mp4_read_descr_len(pb);

  546. #ifdef DEBUG

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

  548. #endif

  549.     return len;

  550. }

  551. 

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

  553. {

  554.     unsigned int val;

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

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

  557.     val |= get_byte(s);

  558.     return val;

  559. }

  560. 

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

  562. {

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

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

  565.     int64_t start_pos = url_ftell(pb);

  566.     int tag, len;

  567. 

  568.     print_atom("esds", atom);

  569. 

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

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

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

  573.     if (tag == MP4ESDescrTag) {

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

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

  576.     } else

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

  578. 

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

  580.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  586. 

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

  588. 	//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);

  589. 	if (tag == MP4DecSpecificDescrTag) {

  590. #ifdef DEBUG

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

  592. #endif

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

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

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

  596. 		st->codec.extradata_size = len;

  597. 	    }

  598. 	}

  599.     }

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

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

  602.     return 0;

  603. }

  604. 

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

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

  607. {

  608.     print_atom("mdat", atom);

  609. 

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

  611.         return 0;

  612.     c->found_mdat=1;

  613.     c->mdat_offset = atom.offset;

  614.     c->mdat_size = atom.size;

  615.     if(c->found_moov)

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

  617.     url_fskip(pb, atom.size);

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

  619. }

  620. 

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

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

  623. {

  624.     int err;

  625. 

  626.     print_atom("moov", atom);

  627. 

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

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

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

  631.     c->found_moov=1;

  632.     if(c->found_mdat)

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

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

  635. }

  636. 

  637. 

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

  639. {

  640.     print_atom("mdhd", atom);

  641. 

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

  643. 

  644.     get_byte(pb); get_byte(pb);

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

  646. 

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

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

  649. 

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

  651. 

  652. #ifdef DEBUG

  653.     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 */

  654. #endif

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

  656. 

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

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

  659. 

  660.     return 0;

  661. }

  662. 

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

  664. {

  665.     print_atom("mvhd", atom);

  666. 

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

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

  669. 

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

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

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

  673. #ifdef DEBUG

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

  675. #endif

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

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

  678. 

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

  680. 

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

  682. 

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

  684. 

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

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

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

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

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

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

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

  692. 

  693.     return 0;

  694. }

  695. 

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

  697. {

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

  699. 

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

  701.         return -1;

  702.     

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

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

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

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

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

  708. 

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

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

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

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

  713.     } else

  714. 	url_fskip(pb, atom.size);

  715. 

  716.     return 0;

  717. }

  718. 

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

  720. {

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

  722. 

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

  724.         return -1;

  725. 

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

  727. 

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

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

  730. 

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

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

  733.     } else

  734. 	url_fskip(pb, atom.size);

  735. 

  736.     return 0;

  737. }

  738. 

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

  740. {

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

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

  743.     unsigned int i, entries;

  744. 

  745.     print_atom("stco", atom);

  746. 

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

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

  749. 

  750.     entries = get_be32(pb);

  751.         

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

  753.         return -1;

  754.  

  755.     sc->chunk_count = entries;

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

  757.     if (!sc->chunk_offsets)

  758.         return -1;

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

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

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

  762.         }

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

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

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

  766.         }

  767.     } else

  768.         return -1;

  769.     

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

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

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

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

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

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

  776.                 c->ni=1;

  777.         }

  778.     }

  779. #ifdef DEBUG

  780. /*

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

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

  783.     }

  784. */

  785. #endif

  786.     return 0;

  787. }

  788. 

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

  790. {

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

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

  793.     int entries, frames_per_sample;

  794.     uint32_t format;

  795.     uint8_t codec_name[32];

  796. 

  797.     /* for palette traversal */

  798.     int color_depth;

  799.     int color_start;

  800.     int color_count;

  801.     int color_end;

  802.     int color_index;

  803.     int color_dec;

  804.     int color_greyscale;

  805.     unsigned char *color_table;

  806.     int j;

  807.     unsigned char r, g, b;

  808. 

  809.     print_atom("stsd", atom);

  810. 

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

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

  813. 

  814.     entries = get_be32(pb);

  815. 

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

  817.         enum CodecID id;

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

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

  820. 

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

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

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

  824. 

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

  826.         id = codec_get_id(mov_video_tags, format);

  827.         if (id >= 0) {

  828.             AVCodec *codec;

  829. 	    codec = avcodec_find_decoder(id);

  830.             if (codec)

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

  832.         }

  833. #ifdef DEBUG

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

  835.                size,

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

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

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

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

  840.                st->codec.codec_type);

  841. #endif

  842. 	st->codec.codec_tag = format;

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

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

  845.             st->codec.codec_id = id;

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

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

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

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

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

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

  852.                 get_be16(pb);

  853.                 get_be16(pb);

  854.             }else{

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

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

  857.             }

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

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

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

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

  862. #ifdef DEBUG

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

  864. #endif

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

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

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

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

  869.         }

  870. 

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

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

  873. 

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

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

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

  877. */

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

  879. #if 0

  880. 	    while (size >= 8) {

  881. 		MOV_atom_t a;

  882.                 int64_t start_pos;

  883. 

  884. 		a.size = get_be32(pb);

  885. 		a.type = get_le32(pb);

  886. 		size -= 8;

  887. #ifdef DEBUG

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

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

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

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

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

  893. 		       a.size, size);

  894. #endif

  895.                 start_pos = url_ftell(pb);

  896. 

  897. 		switch(a.type) {

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

  899.                     {

  900.                         int tag, len;

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

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

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

  904.                         if (tag == 0x03) {

  905.                             /* MP4ESDescrTag */

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

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

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

  909.                             if (tag != 0x04)

  910.                                 goto fail;

  911.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  917.                             if (tag != 0x05)

  918.                                 goto fail;

  919.                             /* MP4DecSpecificDescrTag */

  920. #ifdef DEBUG

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

  922. #endif

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

  924.                             if (sc->header_data) {

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

  926. 				sc->header_len = len;

  927.                             }

  928.                         }

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

  930.                     }

  931.                     break;

  932.                 default:

  933.                     break;

  934.                 }

  935. 	    fail:

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

  937. 		if (atom.size > 8) {

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

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

  940. 		    size -= atom.size - 8;

  941. 		}

  942. 	    }

  943.             if (size > 0) {

  944.                 /* unknown extension */

  945.                 url_fskip(pb, size);

  946.             }

  947. #else

  948. 

  949.             /* figure out the palette situation */

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

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

  952. 

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

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

  955.                 (color_depth == 8)) {

  956. 

  957.                 if (color_greyscale) {

  958. 

  959.                     /* compute the greyscale palette */

  960.                     color_count = 1 << color_depth;

  961.                     color_index = 255;

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

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

  964.                         r = g = b = color_index;

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

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

  967.                         color_index -= color_dec;

  968.                         if (color_index < 0)

  969.                             color_index = 0;

  970.                     }

  971. 

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

  973. 

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

  975.                     color_count = 1 << color_depth;

  976.                     if (color_depth == 2)

  977.                         color_table = ff_qt_default_palette_4;

  978.                     else if (color_depth == 4)

  979.                         color_table = ff_qt_default_palette_16;

  980.                     else

  981.                         color_table = ff_qt_default_palette_256;

  982. 

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

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

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

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

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

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

  989.                     }

  990. 

  991.                 } else {

  992. 

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

  994.                     color_start = get_be32(pb);

  995.                     color_count = get_be16(pb);

  996.                     color_end = get_be16(pb);

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

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

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

  1000.                          * up front */

  1001.                         get_byte(pb);

  1002.                         get_byte(pb);

  1003.                         r = get_byte(pb);

  1004.                         get_byte(pb);

  1005.                         g = get_byte(pb);

  1006.                         get_byte(pb);

  1007.                         b = get_byte(pb);

  1008.                         get_byte(pb);

  1009.                         c->palette_control.palette[j] =

  1010.                             (r << 16) | (g << 8) | (b);

  1011.                     }

  1012.                 }

  1013. 

  1014.                 st->codec.palctrl = &c->palette_control;

  1015.                 st->codec.palctrl->palette_changed = 1;

  1016.             } else

  1017.                 st->codec.palctrl = NULL;

  1018. 

  1019.             a.size = size;

  1020. 	    mov_read_default(c, pb, a);

  1021. #endif

  1022. 	} else {

  1023.             st->codec.codec_id = codec_get_id(mov_audio_tags, format);

  1024. 	    if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244

  1025. 	    {

  1026. #ifdef DEBUG

  1027.                av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");

  1028. #endif

  1029.                get_be32(pb);get_be32(pb); //Reserved_8

  1030.                get_be16(pb);//Reserved_2

  1031.                get_be16(pb);//Reserved_2

  1032.                get_be32(pb);//Reserved_4

  1033.                get_be16(pb);//TimeScale

  1034.                get_be16(pb);//Reserved_2

  1035. 

  1036.                 //AMRSpecificBox.(10 bytes)

  1037.                

  1038.                get_be32(pb); //size

  1039.                get_be32(pb); //type=='damr'

  1040.                get_be32(pb); //vendor

  1041.                get_byte(pb); //decoder version

  1042.                get_be16(pb); //mode_set

  1043.                get_byte(pb); //mode_change_period

  1044.                get_byte(pb); //frames_per_sample

  1045. 

  1046.                st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames

  1047.                if(st->codec.codec_id==CODEC_ID_AMR_NB)

  1048.                {

  1049.                    st->codec.sample_rate=8000;

  1050.                    st->codec.channels=1;

  1051.                }

  1052.                else //AMR-WB

  1053.                {

  1054.                    st->codec.sample_rate=16000;

  1055.                    st->codec.channels=1;

  1056.                }

  1057.                st->codec.bits_per_sample=16;

  1058.                st->codec.bit_rate=0; /*It is not possible to tell this before we have 

  1059.                                        an audio frame and even then every frame can be different*/

  1060. 	    }

  1061.             else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))

  1062.             {

  1063.                 //This is some stuff for the hint track, lets ignore it!

  1064.                 //Do some mp4 auto detect.

  1065.                 c->mp4=1;

  1066.                 size-=(16);

  1067.                 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/

  1068.             }

  1069.             else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))

  1070.             {

  1071.                 MOV_atom_t a;

  1072.                 int mp4_version;

  1073. 

  1074.                 /* Handle mp4 audio tag */

  1075.                 mp4_version=get_be16(pb);/*version*/

  1076.                 get_be16(pb); /*revesion*/

  1077.                 get_be32(pb);

  1078.                 st->codec.channels = get_be16(pb); /* channels */

  1079.                 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */

  1080.                 get_be32(pb);

  1081.                 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */

  1082.                 get_be16(pb);

  1083.                 c->mp4=1;

  1084.                 

  1085.                 if(mp4_version==1)

  1086.                 {

  1087.                     url_fskip(pb,16);

  1088.                     a.size=size-(16+20+16);

  1089.                 }

  1090.                 else

  1091.                     a.size=size-(16+20);

  1092. 

  1093.                 a.offset=url_ftell(pb);

  1094.                                 

  1095.                 mov_read_default(c, pb, a);

  1096. 

  1097.                 /* Get correct sample rate from extradata */

  1098.                 if(st->codec.extradata_size) {

  1099.                    const int samplerate_table[] = {

  1100.                      96000, 88200, 64000, 48000, 44100, 32000, 

  1101.                      24000, 22050, 16000, 12000, 11025, 8000,

  1102.                      7350, 0, 0, 0

  1103.                    };

  1104.                    unsigned char *px = st->codec.extradata;

  1105.                    // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels

  1106.                    int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);

  1107.                    st->codec.sample_rate = samplerate_table[samplerate_index];

  1108.                    st->codec.channels = (px[1] >> 3) & 15;

  1109.                 }

  1110.             }

  1111.             else if( st->codec.codec_tag == MKTAG( 'a', 'l', 'a', 'c' ))

  1112.             {

  1113.                 /* Handle alac audio tag + special extradata */

  1114.                 get_be32(pb); /* version */

  1115.                 get_be32(pb);

  1116.                 st->codec.channels = get_be16(pb); /* channels */

  1117.                 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */

  1118.                 get_be32(pb);

  1119.                 st->codec.sample_rate = get_be16(pb);

  1120.                 get_be16(pb);

  1121. 

  1122.                 /* fetch the 36-byte extradata needed for alac decoding */

  1123.                 st->codec.extradata_size = 36;

  1124.                 st->codec.extradata = (uint8_t*) 

  1125.                     av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  1126.                 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);

  1127.             }

  1128. 	    else if(size>=(16+20))

  1129. 	    {//16 bytes read, reading atleast 20 more

  1130.                 uint16_t version;

  1131. #ifdef DEBUG

  1132.                 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);

  1133. #endif

  1134.                 version = get_be16(pb); /* version */

  1135.                 get_be16(pb); /* revision level */

  1136.                 get_be32(pb); /* vendor */

  1137. 

  1138.                 st->codec.channels = get_be16(pb);		/* channel count */

  1139. 	        st->codec.bits_per_sample = get_be16(pb);	/* sample size */

  1140. 

  1141.                 /* handle specific s8 codec */

  1142.                 get_be16(pb); /* compression id = 0*/

  1143.                 get_be16(pb); /* packet size = 0 */

  1144. 

  1145.                 st->codec.sample_rate = ((get_be32(pb) >> 16));

  1146. 	        //av_log(NULL, AV_LOG_DEBUG, "CODECID %d  %d  %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);

  1147. 

  1148. 	        switch (st->codec.codec_id) {

  1149. 	        case CODEC_ID_PCM_S16BE:

  1150. 		    if (st->codec.bits_per_sample == 8)

  1151. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  1152.                     /* fall */

  1153. 	        case CODEC_ID_PCM_U8:

  1154. 		    st->codec.bit_rate = st->codec.sample_rate * 8;

  1155. 		    break;

  1156. 	        default:

  1157.                     ;

  1158. 	        }

  1159. 

  1160.                 //Read QT version 1 fields. In version 0 theese dont exist

  1161. #ifdef DEBUG

  1162.                 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);

  1163.                 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));

  1164. #endif

  1165.                 if((version==1) && size>=(16+20+16))

  1166.                 {

  1167.                     get_be32(pb); /* samples per packet */

  1168.                     get_be32(pb); /* bytes per packet */

  1169.                     get_be32(pb); /* bytes per frame */

  1170.                     get_be32(pb); /* bytes per sample */

  1171.                     if(size>(16+20+16))

  1172.                     {

  1173.                         //Optional, additional atom-based fields

  1174.                         MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };

  1175. #ifdef DEBUG

  1176.                         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 ),

  1177.                             (format >> 0) & 0xff,

  1178.                             (format >> 8) & 0xff,

  1179.                             (format >> 16) & 0xff,

  1180.                             (format >> 24) & 0xff);

  1181. #endif

  1182.                         mov_read_default(c, pb, a);

  1183.                     }

  1184.                 }

  1185.                 else

  1186.                 {

  1187.                     //We should be down to 0 bytes here, but lets make sure.

  1188.                     size-=(16+20);

  1189. #ifdef DEBUG

  1190.                     if(size>0)

  1191.                         av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));

  1192. #endif

  1193.                     url_fskip(pb, size);

  1194.                 }

  1195.             }

  1196.             else

  1197.             {

  1198.                 size-=16;

  1199.                 //Unknown size, but lets do our best and skip the rest.

  1200. #ifdef DEBUG

  1201.                 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);

  1202. #endif

  1203.                 url_fskip(pb, size);

  1204.             }

  1205.         }

  1206.     }

  1207. 

  1208.     return 0;

  1209. }

  1210. 

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

  1212. {

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

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

  1215.     unsigned int i, entries;

  1216. 

  1217.     print_atom("stsc", atom);

  1218. 

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

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

  1221. 

  1222.     entries = get_be32(pb);

  1223.     

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

  1225.         return -1;

  1226.     

  1227. #ifdef DEBUG

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

  1229. #endif

  1230.     sc->sample_to_chunk_sz = entries;

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

  1232.     if (!sc->sample_to_chunk)

  1233.         return -1;

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

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

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

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

  1238. #ifdef DEBUG

  1239. /*        av_log(NULL, AV_LOG_DEBUG, "sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id); */

  1240. #endif

  1241.     }

  1242.     return 0;

  1243. }

  1244. 

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

  1246. {

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

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

  1249.     unsigned int i, entries;

  1250. 

  1251.     print_atom("stss", atom);

  1252. 

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

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

  1255. 

  1256.     entries = get_be32(pb);

  1257.     

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

  1259.         return -1;

  1260.     

  1261.     sc->keyframe_count = entries;

  1262. #ifdef DEBUG

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

  1264. #endif

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

  1266.     if (!sc->keyframes)

  1267.         return -1;

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

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

  1270. #ifdef DEBUG

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

  1272. #endif

  1273.     }

  1274.     return 0;

  1275. }

  1276. 

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

  1278. {

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

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

  1281.     unsigned int i, entries;

  1282. 

  1283.     print_atom("stsz", atom);

  1284. 

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

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

  1287. 

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

  1289.     entries = get_be32(pb);

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

  1291.         return -1;

  1292. 

  1293.     sc->sample_count = entries;

  1294. #ifdef DEBUG

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

  1296. #endif

  1297.     if(sc->sample_size)

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

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

  1300.     if (!sc->sample_sizes)

  1301.         return -1;

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

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

  1304. #ifdef DEBUG

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

  1306. #endif

  1307.     }

  1308.     return 0;

  1309. }

  1310. 

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

  1312. {

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

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

  1315.     unsigned int i, entries;

  1316.     int64_t duration=0;

  1317.     int64_t total_sample_count=0;

  1318. 

  1319.     print_atom("stts", atom);

  1320. 

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

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

  1323.     entries = get_be32(pb);

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

  1325.         return -1;

  1326. 

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

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

  1329. 

  1330. #ifdef DEBUG

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

  1332. #endif

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

  1334.         int sample_duration;

  1335.         int sample_count;

  1336. 

  1337.         sample_count=get_be32(pb);

  1338.         sample_duration = get_be32(pb);

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

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

  1341. #ifdef DEBUG

  1342.         av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1343. #endif

  1344.         duration+=sample_duration*sample_count;

  1345.         total_sample_count+=sample_count;

  1346. 

  1347. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1348. 

  1349.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1350.             st->codec.time_base.num = sample_duration ? sample_duration : 1;

  1351.             st->codec.time_base.den = c->streams[c->fc->nb_streams-1]->time_scale;

  1352. #ifdef DEBUG

  1353.             av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.time_base.den, sample_duration);

  1354. #endif

  1355.         }

  1356. #endif

  1357.     }

  1358. 

  1359.     /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/

  1360.     if(duration>0)

  1361.     {

  1362.         av_reduce(

  1363.             &st->codec.time_base.den, 

  1364.             &st->codec.time_base.num, 

  1365.             c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,

  1366.             duration,

  1367.             INT_MAX

  1368.         );

  1369. 

  1370. #ifdef DEBUG

  1371.         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.time_base.den/st->codec.time_base.num,total_sample_count,duration,c->streams[c->fc->nb_streams-1]->time_scale);

  1372. #endif

  1373.     }

  1374.     else

  1375.     {

  1376.         st->codec.time_base.num = 1;

  1377.         st->codec.time_base.den = c->streams[c->fc->nb_streams-1]->time_scale;

  1378.     }

  1379.     return 0;

  1380. }

  1381. 

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

  1383. {

  1384. //    AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1385.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1386.     unsigned int i, entries;

  1387. 

  1388.     print_atom("ctts", atom);

  1389. 

  1390.     get_byte(pb); /* version */

  1391.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1392.     entries = get_be32(pb);

  1393.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1394.         return -1;

  1395. 

  1396.     c->streams[c->fc->nb_streams-1]->ctts_count = entries;

  1397.     c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));

  1398. 

  1399. // #ifdef DEBUG

  1400. av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);

  1401. // #endif

  1402.     for(i=0; i<entries; i++) {

  1403.         c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);

  1404.         c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);

  1405.     }

  1406.     return 0;

  1407. }

  1408. 

  1409. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1410. {

  1411.     AVStream *st;

  1412.     MOVStreamContext *sc;

  1413. 

  1414.     print_atom("trak", atom);

  1415. 

  1416.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1417.     if (!st) return -2;

  1418.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1419.     if (!sc) {

  1420. 	av_free(st);

  1421.         return -1;

  1422.     }

  1423. 

  1424.     sc->sample_to_chunk_index = -1;

  1425.     st->priv_data = sc;

  1426.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1427.     st->start_time = 0; /* XXX: check */

  1428.     st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;

  1429.     c->streams[c->fc->nb_streams-1] = sc;

  1430. 

  1431.     return mov_read_default(c, pb, atom);

  1432. }

  1433. 

  1434. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1435. {

  1436.     AVStream *st;

  1437. 

  1438.     print_atom("tkhd", atom);

  1439. 

  1440.     st = c->fc->streams[c->fc->nb_streams-1];

  1441. 

  1442.     get_byte(pb); /* version */

  1443. 

  1444.     get_byte(pb); get_byte(pb);

  1445.     get_byte(pb); /* flags */

  1446.     /*

  1447.     MOV_TRACK_ENABLED 0x0001

  1448.     MOV_TRACK_IN_MOVIE 0x0002

  1449.     MOV_TRACK_IN_PREVIEW 0x0004

  1450.     MOV_TRACK_IN_POSTER 0x0008

  1451.     */

  1452. 

  1453.     get_be32(pb); /* creation time */

  1454.     get_be32(pb); /* modification time */

  1455.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1456.     get_be32(pb); /* reserved */

  1457.     st->start_time = 0; /* check */

  1458.     st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */

  1459.     get_be32(pb); /* reserved */

  1460.     get_be32(pb); /* reserved */

  1461. 

  1462.     get_be16(pb); /* layer */

  1463.     get_be16(pb); /* alternate group */

  1464.     get_be16(pb); /* volume */

  1465.     get_be16(pb); /* reserved */

  1466. 

  1467.     url_fskip(pb, 36); /* display matrix */

  1468. 

  1469.     /* those are fixed-point */

  1470.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1471.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1472. 

  1473.     return 0;

  1474. }

  1475. 

  1476. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1477. /* like the files created with Adobe Premiere 5.0, for samples see */

  1478. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1479. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1480. {

  1481.     int err;

  1482. 

  1483. #ifdef DEBUG

  1484.     print_atom("wide", atom);

  1485.     debug_indent++;

  1486. #endif

  1487.     if (atom.size < 8)

  1488.         return 0; /* continue */

  1489.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1490.         url_fskip(pb, atom.size - 4);

  1491.         return 0;

  1492.     }

  1493.     atom.type = get_le32(pb);

  1494.     atom.offset += 8;

  1495.     atom.size -= 8;

  1496.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1497.         url_fskip(pb, atom.size);

  1498.         return 0;

  1499.     }

  1500.     err = mov_read_mdat(c, pb, atom);

  1501. #ifdef DEBUG

  1502.     debug_indent--;

  1503. #endif

  1504.     return err;

  1505. }

  1506. 

  1507. 

  1508. #ifdef CONFIG_ZLIB

  1509. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1510. {

  1511.     return -1;

  1512. }

  1513. 

  1514. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1515. {

  1516.     ByteIOContext ctx;

  1517.     uint8_t *cmov_data;

  1518.     uint8_t *moov_data; /* uncompressed data */

  1519.     long cmov_len, moov_len;

  1520.     int ret;

  1521. 

  1522.     print_atom("cmov", atom);

  1523. 

  1524.     get_be32(pb); /* dcom atom */

  1525.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1526.         return -1;

  1527.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1528.         av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");

  1529.         return -1;

  1530.     }

  1531.     get_be32(pb); /* cmvd atom */

  1532.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1533.         return -1;

  1534.     moov_len = get_be32(pb); /* uncompressed size */

  1535.     cmov_len = atom.size - 6 * 4;

  1536. 

  1537.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1538.     if (!cmov_data)

  1539.         return -1;

  1540.     moov_data = (uint8_t *) av_malloc(moov_len);

  1541.     if (!moov_data) {

  1542.         av_free(cmov_data);

  1543.         return -1;

  1544.     }

  1545.     get_buffer(pb, cmov_data, cmov_len);

  1546.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1547.         return -1;

  1548.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1549.         return -1;

  1550.     ctx.buf_end = ctx.buffer + moov_len;

  1551.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1552.     atom.offset = 0;

  1553.     atom.size = moov_len;

  1554. #ifdef DEBUG

  1555.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1556. #endif

  1557.     ret = mov_read_default(c, &ctx, atom);

  1558.     av_free(moov_data);

  1559.     av_free(cmov_data);

  1560. 

  1561.     return ret;

  1562. }

  1563. #endif

  1564. 

  1565. /* edit list atom */

  1566. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1567. {

  1568.   int i, edit_count;

  1569.   print_atom("elst", atom);

  1570. 

  1571.   get_byte(pb); /* version */

  1572.   get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1573.   edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */

  1574.   

  1575.   for(i=0; i<edit_count; i++){

  1576.     get_be32(pb); /* Track duration */

  1577.     get_be32(pb); /* Media time */

  1578.     get_be32(pb); /* Media rate */

  1579.   }

  1580. #ifdef DEBUG

  1581.   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);

  1582. #endif

  1583.   return 0;

  1584. }

  1585. 

  1586. static const MOVParseTableEntry mov_default_parse_table[] = {

  1587. /* mp4 atoms */

  1588. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1589. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1590. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1591. { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */

  1592. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1593. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1594. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1595. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1596. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1597. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1598. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1599. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1600. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1601. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1602. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1603. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1604. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1605. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1606. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1607. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1608. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1609. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1610. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1611. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1612. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1613. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1614. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1615. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },

  1616. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1617. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1618. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC }, 

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

  1620. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1621. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1622. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1623. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1624. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1625. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1626. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1627. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1628. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1629. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1630. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1631. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1632. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1633. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1634. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },

  1635. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1636. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1637. /* extra mp4 */

  1638. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1639. /* QT atoms */

  1640. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1641. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1642. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1643. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1644. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1645. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1646. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1647. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1648. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1649. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1650. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1651. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1652. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1653. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1654. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1655. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1656. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1657. #ifdef CONFIG_ZLIB

  1658. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1659. #else

  1660. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1661. #endif

  1662. { 0L, mov_read_leaf }

  1663. };

  1664. 

  1665. static void mov_free_stream_context(MOVStreamContext *sc)

  1666. {

  1667.     if(sc) {

  1668.         av_freep(&sc->chunk_offsets);

  1669.         av_freep(&sc->sample_to_chunk);

  1670.         av_freep(&sc->sample_sizes);

  1671.         av_freep(&sc->keyframes);

  1672.         av_freep(&sc->stts_data);        

  1673.         av_freep(&sc->ctts_data);        

  1674.         av_freep(&sc);

  1675.     }

  1676. }

  1677. 

  1678. static inline uint32_t mov_to_tag(uint8_t *buf)

  1679. {

  1680.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1681. }

  1682. 

  1683. static inline uint32_t to_be32(uint8_t *buf)

  1684. {

  1685.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1686. }

  1687. 

  1688. /* XXX: is it sufficient ? */

  1689. static int mov_probe(AVProbeData *p)

  1690. {

  1691.     unsigned int offset;

  1692.     uint32_t tag;

  1693.     int score = 0;

  1694. 

  1695.     /* check file header */

  1696.     if (p->buf_size <= 12)

  1697.         return 0;

  1698.     offset = 0;

  1699.     for(;;) {

  1700.         /* ignore invalid offset */

  1701.         if ((offset + 8) > (unsigned int)p->buf_size)

  1702.             return score;

  1703.         tag = mov_to_tag(p->buf + offset + 4);

  1704.         switch(tag) {

  1705.         /* check for obvious tags */

  1706.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1707.         case MKTAG( 'm', 'd', 'a', 't' ):

  1708.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1709.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1710.             return AVPROBE_SCORE_MAX;

  1711.         /* those are more common words, so rate then a bit less */

  1712.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1713.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1714.         case MKTAG( 'j', 'u', 'n', 'k' ):

  1715.         case MKTAG( 'p', 'i', 'c', 't' ):

  1716.             return AVPROBE_SCORE_MAX - 5;

  1717.         case MKTAG( 'f', 't', 'y', 'p' ):

  1718.         case MKTAG( 's', 'k', 'i', 'p' ):

  1719.         case MKTAG( 'u', 'u', 'i', 'd' ):

  1720.             offset = to_be32(p->buf+offset) + offset;

  1721.             /* if we only find those cause probedata is too small at least rate them */

  1722.             score = AVPROBE_SCORE_MAX - 50;

  1723.             break;

  1724.         default:

  1725.             /* unrecognized tag */

  1726.             return score;

  1727.         }

  1728.     }

  1729.     return score;

  1730. }

  1731. 

  1732. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1733. {

  1734.     MOVContext *mov = (MOVContext *) s->priv_data;

  1735.     ByteIOContext *pb = &s->pb;

  1736.     int i, j, nb, err;

  1737.     MOV_atom_t atom = { 0, 0, 0 };

  1738. 

  1739.     mov->fc = s;

  1740.     mov->parse_table = mov_default_parse_table;

  1741. #if 0

  1742.     /* XXX: I think we should auto detect */

  1743.     if(s->iformat->name[1] == 'p')

  1744.         mov->mp4 = 1;

  1745. #endif

  1746.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1747. 	atom.size = url_fsize(pb);

  1748.     else

  1749. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1750. 

  1751. #ifdef DEBUG

  1752.     av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);

  1753. #endif

  1754. 

  1755.     /* check MOV header */

  1756.     err = mov_read_default(mov, pb, atom);

  1757.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1758. 	av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1759. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1760. 	return -1;

  1761.     }

  1762. #ifdef DEBUG

  1763.     av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1764. #endif

  1765.     /* some cleanup : make sure we are on the mdat atom */

  1766.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1767.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1768. 

  1769.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1770. 

  1771. #ifdef DEBUG

  1772.     av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1773. #endif

  1774. 

  1775. #ifdef DEBUG

  1776.     av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);

  1777. #endif

  1778.     mov->total_streams = nb = s->nb_streams;

  1779. 

  1780. #if 1

  1781.     for(i=0; i<s->nb_streams;) {

  1782.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1783.             av_free(s->streams[i]);

  1784.             for(j=i+1; j<s->nb_streams; j++)

  1785.                 s->streams[j-1] = s->streams[j];

  1786.             s->nb_streams--;

  1787.         } else

  1788.             i++;

  1789.     }

  1790.     for(i=0; i<s->nb_streams;i++) {

  1791.         MOVStreamContext *sc;

  1792.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1793.         sc->ffindex = i;

  1794.         sc->is_ff_stream = 1;

  1795.     }

  1796. #endif

  1797. #ifdef DEBUG

  1798.     av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);

  1799. #endif

  1800.     return 0;

  1801. }

  1802. 

  1803. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1804. /* XXX:remove useless commented code sometime */

  1805. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1806. {

  1807.     MOVContext *mov = (MOVContext *) s->priv_data;

  1808.     MOVStreamContext *sc;

  1809.     int64_t offset = INT64_MAX;

  1810.     int64_t best_dts = INT64_MAX;

  1811.     int i, a, b, m;

  1812.     int size;

  1813.     int idx;

  1814.     size = 0x0FFFFFFF;

  1815. 

  1816. #ifdef MOV_SPLIT_CHUNKS

  1817.     if (mov->partial) {

  1818. 	sc = mov->partial;

  1819. 	idx = sc->sample_to_chunk_index;

  1820. 

  1821.         if (idx < 0) return 0;

  1822. #ifdef DEBUG

  1823.         fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);

  1824. #endif

  1825.         //size = sc->sample_sizes[sc->current_sample];

  1826.         // that ain't working...

  1827.         //size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1828.         size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1829. 

  1830.         sc->current_sample++;

  1831.         sc->left_in_chunk--;

  1832. 

  1833.         if (sc->left_in_chunk <= 0)

  1834.             mov->partial = 0;

  1835.         offset = mov->next_chunk_offset;

  1836.         /* extract the sample */

  1837. 

  1838.         goto readchunk;

  1839.     }

  1840. #endif

  1841. 

  1842. again:

  1843.     sc = 0;

  1844.     if(offset == INT64_MAX)

  1845.         best_dts= INT64_MAX;

  1846.     for(i=0; i<mov->total_streams; i++) {

  1847. 	MOVStreamContext *msc = mov->streams[i];

  1848. 

  1849.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){

  1850.             if (msc->sample_to_time_index < msc->stts_count && mov->ni) {

  1851.                 int64_t dts;

  1852.                 int index= msc->sample_to_time_index;

  1853.                 int sample= msc->sample_to_time_sample;

  1854.                 int time= msc->sample_to_time_time;

  1855.                 int duration = msc->stts_data[index].duration;

  1856.                 int count = msc->stts_data[index].count;

  1857.                 if (sample + count < msc->current_sample) {

  1858.                     sample += count;

  1859.                     time   += count*duration;

  1860.                     index ++;

  1861.                     duration = msc->stts_data[index].duration;

  1862.                 }

  1863.                 dts = time + (msc->current_sample-1 - sample) * (int64_t)duration;

  1864.                 dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale);

  1865. //                av_log(NULL, AV_LOG_DEBUG, "%d %Ld %Ld %Ld \n", i, dts, best_dts, offset);

  1866.                 if(dts < best_dts){

  1867.                     best_dts= dts;

  1868.                     sc = msc;

  1869.                     offset = msc->chunk_offsets[msc->next_chunk];

  1870.                 }

  1871.             }else{

  1872.             //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));

  1873.                 if ((msc->chunk_offsets[msc->next_chunk] < offset)) {

  1874.                     sc = msc;

  1875.                     offset = msc->chunk_offsets[msc->next_chunk];

  1876.                     //av_log(NULL, AV_LOG_DEBUG, "SELETED  %Ld  i:%d\n", offset, i);

  1877.                 }

  1878.             }

  1879.         }

  1880.     }

  1881.     if (!sc || offset==INT64_MAX)

  1882. 	return -1;

  1883. 

  1884.     sc->next_chunk++;

  1885. 

  1886.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1887.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1888.         mov->next_chunk_offset = offset;

  1889.     }

  1890. 

  1891. //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1892.     if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {

  1893.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1894.         mov->next_chunk_offset = offset;

  1895. 	offset = INT64_MAX;

  1896.         goto again;

  1897.     }

  1898. 

  1899.     /* now get the chunk size... */

  1900. 

  1901.     for(i=0; i<mov->total_streams; i++) {

  1902. 	MOVStreamContext *msc = mov->streams[i];

  1903. 	if ((msc->next_chunk < msc->chunk_count)

  1904.             && msc->chunk_offsets[msc->next_chunk] - offset < size

  1905.             && msc->chunk_offsets[msc->next_chunk] > offset)

  1906. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1907.     }

  1908. 

  1909. #ifdef MOV_MINOLTA_FIX

  1910.     //Make sure that size is according to sample_size (Needed by .mov files 

  1911.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1912.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1913.     //but I have no such movies

  1914.     if (sc->sample_size > 0) { 

  1915.         int foundsize=0;

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

  1917.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )

  1918.             {

  1919. 		// I can't figure out why for PCM audio sample_size is always 1

  1920. 		// (it should actually be channels*bits_per_second/8) but it is.

  1921. 		AVCodecContext* cod = &s->streams[sc->ffindex]->codec;

  1922.                 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))

  1923. 		    foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;

  1924. 		else

  1925. 		    foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1926.             }

  1927. #ifdef DEBUG

  1928.             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);

  1929. #endif

  1930.         }

  1931.         if( (foundsize>0) && (foundsize<size) )

  1932.         {

  1933. #ifdef DEBUG

  1934.             /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/

  1935. #endif

  1936.             size=foundsize;

  1937.         }

  1938.     }

  1939. #endif //MOV_MINOLTA_FIX

  1940. 

  1941.     idx = sc->sample_to_chunk_index;

  1942.     if (idx + 1 < sc->sample_to_chunk_sz && sc->next_chunk >= sc->sample_to_chunk[idx + 1].first)

  1943.         idx++;

  1944.     sc->sample_to_chunk_index = idx;

  1945. #ifdef MOV_SPLIT_CHUNKS

  1946.     /* split chunks into samples */

  1947.     if (sc->sample_size == 0 || sc->sample_size > 100) {

  1948.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1949. 	    mov->partial = sc;

  1950.             /* we'll have to get those samples before next chunk */

  1951.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1952.             size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1953.         }

  1954. 

  1955.         sc->current_sample++;

  1956.     }else if(idx + 1 < sc->sample_to_chunk_sz){

  1957.         sc->current_sample += sc->sample_size * sc->sample_to_chunk[idx].count;

  1958.     }

  1959. #endif

  1960. 

  1961. readchunk:

  1962. #ifdef DEBUG

  1963.     av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);

  1964. #endif

  1965.     if(size == 0x0FFFFFFF)

  1966.         size = mov->mdat_size + mov->mdat_offset - offset;

  1967.     if(size < 0)

  1968.         return -1;

  1969.     if(size == 0)

  1970.         return -1;

  1971.     url_fseek(&s->pb, offset, SEEK_SET);

  1972. 

  1973.     av_get_packet(&s->pb, pkt, size);

  1974.     pkt->stream_index = sc->ffindex;

  1975.     

  1976.     // If the keyframes table exists, mark any samples that are in the table as key frames.

  1977.     // If no table exists, treat very sample as a key frame.

  1978.     if (sc->keyframes) {        

  1979.         a = 0;

  1980.         b = sc->keyframe_count - 1;

  1981.         

  1982.         while (a < b) {

  1983.             m = (a + b + 1) >> 1;

  1984.             if (sc->keyframes[m] > sc->current_sample) {

  1985.                 b = m - 1;

  1986.             } else {

  1987.                 a = m;

  1988.             }    

  1989.         }

  1990.         

  1991.         if (sc->keyframes[a] == sc->current_sample)

  1992.             pkt->flags |= PKT_FLAG_KEY;

  1993.     }

  1994.     else

  1995.         pkt->flags |= PKT_FLAG_KEY;

  1996. 

  1997. #ifdef DEBUG

  1998. /*

  1999.     av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);

  2000.     for(i=0; i<8; i++)

  2001.         av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);

  2002.     for(i=0; i<8; i++)

  2003.         av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);

  2004.     av_log(NULL, AV_LOG_DEBUG, "\n");

  2005. */

  2006. #endif

  2007. 

  2008.     mov->next_chunk_offset = offset + size;

  2009.     

  2010.     /* find the corresponding dts */	 

  2011.     if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {	 

  2012.       unsigned int count;

  2013.       uint64_t dts, pts;

  2014.       unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;

  2015.       count = sc->stts_data[sc->sample_to_time_index].count;

  2016.       if ((sc->sample_to_time_sample + count) < sc->current_sample) {	 

  2017.         sc->sample_to_time_sample += count;	 

  2018.         sc->sample_to_time_time   += count*duration;	 

  2019.         sc->sample_to_time_index ++;	 

  2020.         duration = sc->stts_data[sc->sample_to_time_index].duration;

  2021.       }	 

  2022.       dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;

  2023.         /* find the corresponding pts */

  2024.         if (sc->sample_to_ctime_index < sc->ctts_count) {

  2025.             int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  2026.             int count = sc->ctts_data[sc->sample_to_ctime_index].count;

  2027. 

  2028.             if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {

  2029.                 sc->sample_to_ctime_sample += count;

  2030.                 sc->sample_to_ctime_index ++;

  2031.                 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  2032.             }

  2033.             pts = dts + duration;

  2034.         }else

  2035.             pts = dts;

  2036.         pkt->pts = av_rescale( pts,

  2037.                          (int64_t)s->streams[sc->ffindex]->time_base.den,

  2038.                          (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );

  2039.         pkt->dts = av_rescale( dts,

  2040.                          (int64_t)s->streams[sc->ffindex]->time_base.den,

  2041.                          (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );

  2042. #ifdef DEBUG

  2043.     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"

  2044.       , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts

  2045.       , sc->sample_to_time_sample

  2046.       , sc->sample_to_time_time

  2047.       , sc->sample_to_time_index

  2048.       , sc->stts_count

  2049.       , count

  2050.       , duration);

  2051. #endif

  2052.     }

  2053. 

  2054.     return 0;

  2055. }

  2056. 

  2057. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  2058. /**

  2059.  * Seek method based on the one described in the Appendix C of QTFileFormat.pdf

  2060.  */

  2061. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)

  2062. {

  2063.     MOVContext* mov = (MOVContext *) s->priv_data;

  2064.     MOVStreamContext* sc;

  2065.     int32_t i, a, b, m;

  2066.     int64_t sample_time;

  2067.     int64_t start_time;

  2068.     int32_t seek_sample, sample;

  2069.     int32_t duration;

  2070.     int32_t count;

  2071.     int32_t chunk;

  2072.     int32_t left_in_chunk;

  2073.     int64_t chunk_file_offset;

  2074.     int64_t sample_file_offset;

  2075.     int32_t first_chunk_sample;

  2076.     int32_t sample_to_chunk_idx;

  2077.     int sample_to_time_index;	 

  2078.     long sample_to_time_sample = 0;	 

  2079.     uint64_t sample_to_time_time = 0;      

  2080.     int mov_idx;

  2081. 

  2082.     // Find the corresponding mov stream

  2083.     for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)

  2084.         if (mov->streams[mov_idx]->ffindex == stream_index)

  2085.             break;

  2086.     if (mov_idx == mov->total_streams) {

  2087.         av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);

  2088.         return -1;

  2089.     }

  2090.     sc = mov->streams[mov_idx];

  2091. 

  2092.     // Step 1. Find the edit that contains the requested time (elst)

  2093.     if (sc->edit_count) {

  2094.         // FIXME should handle edit list

  2095.         av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);

  2096.         return -1;

  2097.     }

  2098. 

  2099.     // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */

  2100. #ifdef DEBUG

  2101.   av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);

  2102. #endif

  2103.     // convert timestamp from time_base unit to timescale unit

  2104.     sample_time = av_rescale( timestamp,

  2105.                             (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,

  2106.                             (int64_t)s->streams[stream_index]->time_base.den);

  2107.     start_time = 0; // FIXME use elst atom

  2108.     sample = 1; // sample are 0 based in table

  2109. #ifdef DEBUG

  2110.     av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);

  2111. #endif

  2112.     for (i = 0; i < sc->stts_count; i++) {

  2113.         count = sc->stts_data[i].count;

  2114.         duration = sc->stts_data[i].duration;

  2115. //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);                

  2116. //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);        

  2117.         if ((start_time + count*duration) > sample_time) {

  2118.             sample_to_time_time = start_time;	 

  2119.             sample_to_time_index = i;	 

  2120.             sample_to_time_sample = sample;         

  2121.             sample += (sample_time - start_time) / duration;

  2122.             break;

  2123.         }

  2124.         sample += count;

  2125.         start_time += count * duration;

  2126.     }   

  2127.     sample_to_time_time = start_time;	 

  2128.     sample_to_time_index = i;       

  2129.     /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom

  2130.        is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */

  2131. 

  2132. #ifdef DEBUG

  2133.     av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);

  2134. #endif

  2135.     if (sample > sc->sample_count) {

  2136.         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);

  2137.         return -1;

  2138.     }

  2139. 

  2140.     // Step 3. Find the prior sync. sample using the Sync sample atom (stss)

  2141.     if (sc->keyframes) {

  2142.         a = 0;

  2143.         b = sc->keyframe_count - 1;

  2144.         while (a < b) {

  2145.             m = (a + b + 1) >> 1;

  2146.             if (sc->keyframes[m] > sample) {

  2147.                 b = m - 1;

  2148.             } else {

  2149.                 a = m;

  2150.             }

  2151. #ifdef DEBUG

  2152.          // 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);

  2153. #endif

  2154.         }

  2155.         // for low latency prob: always use the previous keyframe, just uncomment the next line

  2156.         // if (a) a--;

  2157.         seek_sample = sc->keyframes[a];

  2158.     }

  2159.     else

  2160.         seek_sample = sample; // else all samples are key frames

  2161. #ifdef DEBUG

  2162.     av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);

  2163. #endif

  2164. 

  2165.     // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)

  2166.     for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {

  2167.         b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;

  2168.         if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))

  2169.             break;

  2170.         first_chunk_sample += b;

  2171.     }

  2172.     chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;

  2173.     left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;

  2174.     first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;

  2175.     sample_to_chunk_idx = i;

  2176. #ifdef DEBUG

  2177.     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);

  2178. #endif

  2179. 

  2180.     // Step 5. Find the offset of the chunk using the chunk offset atom

  2181.     if (!sc->chunk_offsets) {

  2182.         av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");

  2183.         return -1;

  2184.     }

  2185.     if (chunk > sc->chunk_count) {

  2186.         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);

  2187.         return -1;

  2188.     }

  2189.     chunk_file_offset = sc->chunk_offsets[chunk - 1];

  2190. #ifdef DEBUG

  2191.     av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);

  2192. #endif

  2193. 

  2194.     // Step 6. Find the byte offset within the chunk using the sample size atom

  2195.     sample_file_offset = chunk_file_offset;

  2196.     if (sc->sample_size)

  2197.         sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;

  2198.     else {

  2199.         for (i = 0; i < (seek_sample - first_chunk_sample); i++) {

  2200.         sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];

  2201.         }

  2202.     }

  2203. #ifdef DEBUG

  2204.     av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);

  2205. #endif

  2206. 

  2207.     // Step 6. Update the parser

  2208.     mov->partial = sc;

  2209.     mov->next_chunk_offset = sample_file_offset;

  2210.     // Update current stream state

  2211.     sc->current_sample = seek_sample - 1;  // zero based

  2212.     sc->left_in_chunk = left_in_chunk;

  2213.     sc->next_chunk = chunk; // +1 -1 (zero based)

  2214.     sc->sample_to_chunk_index = sample_to_chunk_idx;

  2215. 

  2216.     // Update other streams    

  2217.     for (i = 0; i<mov->total_streams; i++) {

  2218.         MOVStreamContext *msc;

  2219.         if (i == mov_idx) continue;

  2220.         // Find the nearest 'next' chunk

  2221.         msc = mov->streams[i];

  2222.         a = 0;

  2223.         b = msc->chunk_count - 1;

  2224.         while (a < b) {

  2225.             m = (a + b + 1) >> 1;

  2226.             if (msc->chunk_offsets[m] > chunk_file_offset) {

  2227.                 b = m - 1;

  2228.             } else {

  2229.                 a = m;

  2230.             }

  2231. #ifdef DEBUG            

  2232. /*            av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"

  2233.             , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m],  i); */

  2234. #endif                  

  2235.         }

  2236.         msc->next_chunk = a;

  2237.         if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))

  2238.             msc->next_chunk ++;

  2239. #ifdef DEBUG        

  2240.         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]);

  2241. #endif        

  2242.         // Compute sample count and index in the sample_to_chunk table (what a pity)

  2243.         msc->sample_to_chunk_index = 0;

  2244.         msc->current_sample = 0;

  2245.         for(;  msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)

  2246.             && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {

  2247.             msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \

  2248.             * msc->sample_to_chunk[msc->sample_to_chunk_index].count;

  2249.         }

  2250.         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;

  2251.         msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;

  2252.         // Find corresponding position in stts (used later to compute dts)	 

  2253.         sample = 0;	 

  2254.         start_time = 0;	 

  2255.         for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {	 

  2256.             count = msc->stts_data[msc->sample_to_time_index].count;

  2257.             duration = msc->stts_data[msc->sample_to_time_index].duration;

  2258.             if ((sample + count - 1) > msc->current_sample) {	 

  2259.                 msc->sample_to_time_time = start_time;	 

  2260.                 msc->sample_to_time_sample = sample;	 

  2261.                 break;	 

  2262.             }	 

  2263.             sample += count;	 

  2264.             start_time += count * duration;	 

  2265.         }

  2266.         sample = 0;

  2267.         for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {

  2268.             count = msc->ctts_data[msc->sample_to_ctime_index].count;

  2269.             duration = msc->ctts_data[msc->sample_to_ctime_index].duration;

  2270.             if ((sample + count - 1) > msc->current_sample) {

  2271.                 msc->sample_to_ctime_sample = sample;

  2272.                 break;

  2273.             }

  2274.             sample += count;

  2275.         }       

  2276. #ifdef DEBUG        

  2277.         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);

  2278. #endif        

  2279.     }                

  2280.     return 0;

  2281. }

  2282. #endif

  2283. 

  2284. static int mov_read_close(AVFormatContext *s)

  2285. {

  2286.     int i;

  2287.     MOVContext *mov = (MOVContext *) s->priv_data;

  2288.     for(i=0; i<mov->total_streams; i++)

  2289.         mov_free_stream_context(mov->streams[i]);

  2290.     /* free color tabs */

  2291.     for(i=0; i<mov->ctab_size; i++)

  2292. 	av_freep(&mov->ctab[i]);

  2293.     av_freep(&mov->ctab);

  2294.     return 0;

  2295. }

  2296. 

  2297. static AVInputFormat mov_iformat = {

  2298.     "mov,mp4,m4a,3gp,3g2",

  2299.     "QuickTime/MPEG4 format",

  2300.     sizeof(MOVContext),

  2301.     mov_probe,

  2302.     mov_read_header,

  2303.     mov_read_packet,

  2304.     mov_read_close,

  2305. #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)

  2306.     mov_read_seek,

  2307. #endif    

  2308. };

  2309. 

  2310. int mov_init(void)

  2311. {

  2312.     av_register_input_format(&mov_iformat);

  2313.     return 0;

  2314. }