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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. #include "avformat.h"

  20. #include "avi.h"

  21. 

  22. #ifdef CONFIG_ZLIB

  23. #include <zlib.h>

  24. #endif

  25. 

  26. /*

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

  28.  *

  29.  * Features and limitations:

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

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

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

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

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

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

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

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

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

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

  40.  *

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

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

  43.  *

  44.  * Reference documents:

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

  46.  * Apple:

  47.  *  http://developer.apple.com/techpubs/quicktime/qtdevdocs/QTFF/qtff.html

  48.  *  http://developer.apple.com/techpubs/quicktime/qtdevdocs/PDF/QTFileFormat.pdf

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

  50.  */

  51. 

  52. //#define DEBUG

  53. #ifdef DEBUG

  54. #include <stdio.h>

  55. #include <fcntl.h>

  56. #endif

  57. 

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

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

  60. #define MOV_SPLIT_CHUNKS

  61. 

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

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

  64. #define MOV_MINOLTA_FIX

  65. 

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

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

  68. /* getting rid of these */

  69. #define CODEC_TYPE_MOV_OTHER	(enum CodecType) 2

  70. 

  71. static const CodecTag mov_video_tags[] = {

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

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

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

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

  76. /* Graphics */

  77. /* Animation */

  78. /* Apple video */

  79. /* Kodak Photo CD */

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

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

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

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

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

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

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

  87. /* Sorenson video */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  103.     { CODEC_ID_NONE, 0 },

  104. };

  105. 

  106. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  117. 

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

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

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

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

  122. /* MP4 tags */

  123.     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG 4 AAC or audio ? */

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

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

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

  127.     { CODEC_ID_NONE, 0 },

  128. };

  129. 

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

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

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

  133.  */

  134. 

  135. typedef struct MOV_sample_to_chunk_tbl {

  136.     long first;

  137.     long count;

  138.     long id;

  139. } MOV_sample_to_chunk_tbl;

  140. 

  141. typedef struct {

  142.     uint32_t type;

  143.     int64_t offset;

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

  145. } MOV_atom_t;

  146. 

  147. typedef struct {

  148.     int seed;

  149.     int flags;

  150.     int size;

  151.     void* clrs;

  152. } MOV_ctab_t;

  153. 

  154. typedef struct {

  155.     uint8_t  version;

  156.     uint32_t flags; // 24bit

  157. 

  158.     /* 0x03 ESDescrTag */

  159.     uint16_t es_id;

  160. #define MP4ODescrTag			0x01

  161. #define MP4IODescrTag			0x02

  162. #define MP4ESDescrTag			0x03

  163. #define MP4DecConfigDescrTag		0x04

  164. #define MP4DecSpecificDescrTag		0x05

  165. #define MP4SLConfigDescrTag		0x06

  166. #define MP4ContentIdDescrTag		0x07

  167. #define MP4SupplContentIdDescrTag	0x08

  168. #define MP4IPIPtrDescrTag		0x09

  169. #define MP4IPMPPtrDescrTag		0x0A

  170. #define MP4IPMPDescrTag			0x0B

  171. #define MP4RegistrationDescrTag		0x0D

  172. #define MP4ESIDIncDescrTag		0x0E

  173. #define MP4ESIDRefDescrTag		0x0F

  174. #define MP4FileIODescrTag		0x10

  175. #define MP4FileODescrTag		0x11

  176. #define MP4ExtProfileLevelDescrTag	0x13

  177. #define MP4ExtDescrTagsStart		0x80

  178. #define MP4ExtDescrTagsEnd		0xFE

  179.     uint8_t  stream_priority;

  180. 

  181.     /* 0x04 DecConfigDescrTag */

  182.     uint8_t  object_type_id;

  183.     uint8_t  stream_type;

  184.     /* XXX: really streamType is

  185.      * only 6bit, followed by:

  186.      * 1bit  upStream

  187.      * 1bit  reserved

  188.      */

  189.     uint32_t buffer_size_db; // 24

  190.     uint32_t max_bitrate;

  191.     uint32_t avg_bitrate;

  192. 

  193.     /* 0x05 DecSpecificDescrTag */

  194.     uint8_t  decoder_cfg_len;

  195.     uint8_t *decoder_cfg;

  196. 

  197.     /* 0x06 SLConfigDescrTag */

  198.     uint8_t  sl_config_len;

  199.     uint8_t *sl_config;

  200. } MOV_esds_t;

  201. 

  202. struct MOVParseTableEntry;

  203. 

  204. typedef struct MOVStreamContext {

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

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

  207.     long next_chunk;

  208.     long chunk_count;

  209.     int64_t *chunk_offsets;

  210.     long sample_to_chunk_sz;

  211.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  212.     long sample_to_chunk_index;

  213.     long sample_size;

  214.     long sample_count;

  215.     long *sample_sizes;

  216.     int time_scale;

  217.     long current_sample;

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

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

  220.     int header_len;

  221.     uint8_t *header_data;

  222.     MOV_esds_t esds;

  223. } MOVStreamContext;

  224. 

  225. typedef struct MOVContext {

  226.     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) */

  227.     AVFormatContext *fc;

  228.     int time_scale;

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

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

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

  232.     int64_t mdat_size;

  233.     int64_t mdat_offset;

  234.     int total_streams;

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

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

  237.      */

  238.     MOVStreamContext *streams[MAX_STREAMS];

  239. 

  240.     int64_t next_chunk_offset;

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

  242.     int ctab_size;

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

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

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

  246. } MOVContext;

  247. 

  248. 

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

  250. 

  251. /* those functions parse an atom */

  252. /* return code:

  253.  1: found what I wanted, exit

  254.  0: continue to parse next atom

  255.  -1: error occured, exit

  256.  */

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

  258. 

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

  260. typedef struct MOVParseTableEntry {

  261.     uint32_t type;

  262.     mov_parse_function func;

  263. } MOVParseTableEntry;

  264. 

  265. #ifdef DEBUG

  266. /*

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

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

  269.  */

  270. static int debug_indent = 0;

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

  272. {

  273.     unsigned int tag, i;

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

  275.     i=debug_indent;

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

  277.     while(i--)

  278.         printf("|");

  279.     printf("parse:");

  280.     printf(" %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",

  281.            str, tag & 0xff,

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

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

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

  285.            (unsigned int)atom.offset,

  286. 	   (unsigned int)atom.size);

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

  288. }

  289. #else

  290. #define print_atom(a,b)

  291. #endif

  292. 

  293. 

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

  295. {

  296.     print_atom("leaf", atom);

  297. 

  298.     if (atom.size>1)

  299.         url_fskip(pb, atom.size);

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

  301.     return 0;

  302. }

  303. 

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

  305. {

  306.     int64_t total_size = 0;

  307.     MOV_atom_t a;

  308.     int i;

  309.     int err = 0;

  310. 

  311. #ifdef DEBUG

  312.     print_atom("default", atom);

  313.     debug_indent++;

  314. #endif

  315. 

  316.     a.offset = atom.offset;

  317. 

  318.     if (atom.size < 0)

  319. 	atom.size = 0x7fffffffffffffffLL;

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

  321. 	a.size = atom.size;

  322. 	a.type=0L;

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

  324. 	    a.size = get_be32(pb);

  325.             a.type = get_le32(pb);

  326.         }

  327. 	total_size += 8;

  328.         a.offset += 8;

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

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

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

  332.             a.offset += 8;

  333.             total_size += 8;

  334.         }

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

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

  337. 	    if (a.size <= 8)

  338.                 break;

  339. 	}

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

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

  342. 	    /* empty */;

  343. 

  344. 	a.size -= 8;

  345. //        printf(" i=%ld\n", i);

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

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

  348. #ifdef DEBUG

  349.             print_atom("unknown", a);

  350. #endif

  351.             url_fskip(pb, a.size);

  352. 	} else {

  353. #ifdef DEBUG

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

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

  356. #endif

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

  358. 	}

  359. 

  360. 	a.offset += a.size;

  361.         total_size += a.size;

  362.     }

  363. 

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

  365. 	//printf("RESET  %Ld  %Ld  err:%d\n", atom.size, total_size, err);

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

  367.     }

  368. 

  369. #ifdef DEBUG

  370.     debug_indent--;

  371. #endif

  372.     return err;

  373. }

  374. 

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

  376. {

  377.     unsigned int len;

  378.     MOV_ctab_t *t;

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

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

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

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

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

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

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

  386.     if (len > 0) {

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

  388. 	if (t->clrs)

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

  390.     }

  391. 

  392.     return 0;

  393. }

  394. 

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

  396. {

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

  398.     int len = 0;

  399.     uint32_t type;

  400.     uint32_t ctype;

  401. 

  402.     print_atom("hdlr", atom);

  403. 

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

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

  406. 

  407.     /* component type */

  408.     ctype = get_le32(pb);

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

  410. 

  411. #ifdef DEBUG

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

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

  414. #endif

  415. #ifdef DEBUG

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

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

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

  419.             puts("hdlr: vide");

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

  421.             puts("hdlr: soun");

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

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

  424.             puts("hdlr: vide");

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

  426.             puts("hdlr: soun");

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

  428.             puts("hdlr: odsm");

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

  430.             puts("hdlr: sdsm");

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

  432. #endif

  433. 

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

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

  436.         c->mp4 = 0;

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

  438.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  440.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  443.         c->mp4 = 1;

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

  445.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  447.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  448.     }

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

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

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

  452. 

  453.     if(atom.size <= 24)

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

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

  456.     /* component name */

  457. 

  458.     if(c->mp4) {

  459.         /* .mp4: C string */

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

  461.     } else {

  462.         /* .mov: PASCAL string */

  463. #ifdef DEBUG

  464.         char* buf;

  465. #endif

  466.         len = get_byte(pb);

  467. #ifdef DEBUG

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

  469. 	if (buf) {

  470. 	    get_buffer(pb, buf, len);

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

  472. 	    printf("**buf='%s'\n", buf);

  473. 	    av_free(buf);

  474. 	} else

  475. #endif

  476. 	    url_fskip(pb, len);

  477.     }

  478. 

  479.     return 0;

  480. }

  481. 

  482. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  483. {

  484.     int len = 0;

  485.     int count = 4;

  486.     while (count--) {

  487.         int c = get_byte(pb);

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

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

  490. 	    break;

  491.     }

  492.     return len;

  493. }

  494. 

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

  496. {

  497.     int len;

  498.     *tag = get_byte(pb);

  499.     len = mov_mp4_read_descr_len(pb);

  500. #ifdef DEBUG

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

  502. #endif

  503.     return len;

  504. }

  505. 

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

  507. {

  508.     unsigned int val;

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

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

  511.     val |= get_byte(s);

  512.     return val;

  513. }

  514. 

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

  516. {

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

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

  519.     int64_t start_pos = url_ftell(pb);

  520.     int tag, len;

  521. 

  522.     print_atom("esds", atom);

  523. 

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

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

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

  527.     if (tag == MP4ESDescrTag) {

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

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

  530.     } else

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

  532. 

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

  534.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  540. 

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

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

  543. 	if (tag == MP4DecSpecificDescrTag) {

  544. #ifdef DEBUG

  545. 	    printf("Specific MPEG4 header len=%d\n", len);

  546. #endif

  547. 	    st->codec.extradata = (uint8_t*) av_mallocz(len);

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

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

  550. 		st->codec.extradata_size = len;

  551. 	    }

  552. 	}

  553.     }

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

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

  556.     return 0;

  557. }

  558. 

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

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

  561. {

  562.     print_atom("mdat", atom);

  563. 

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

  565.         return 0;

  566.     c->found_mdat=1;

  567.     c->mdat_offset = atom.offset;

  568.     c->mdat_size = atom.size;

  569.     if(c->found_moov)

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

  571.     url_fskip(pb, atom.size);

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

  573. }

  574. 

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

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

  577. {

  578.     int err;

  579. 

  580.     print_atom("moov", atom);

  581. 

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

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

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

  585.     c->found_moov=1;

  586.     if(c->found_mdat)

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

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

  589. }

  590. 

  591. 

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

  593. {

  594.     print_atom("mdhd", atom);

  595. 

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

  597. 

  598.     get_byte(pb); get_byte(pb);

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

  600. 

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

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

  603. 

  604.     c->streams[c->total_streams]->time_scale = get_be32(pb);

  605. 

  606. #ifdef DEBUG

  607.     printf("track[%i].time_scale = %i\n", c->fc->nb_streams-1, c->streams[c->total_streams]->time_scale); /* time scale */

  608. #endif

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

  610. 

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

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

  613. 

  614.     return 0;

  615. }

  616. 

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

  618. {

  619.     print_atom("mvhd", atom);

  620. 

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

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

  623. 

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

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

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

  627. #ifdef DEBUG

  628.     printf("time scale = %i\n", c->time_scale);

  629. #endif

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

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

  632. 

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

  634. 

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

  636. 

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

  638. 

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

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

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

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

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

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

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

  646. 

  647.     return 0;

  648. }

  649. 

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

  651. {

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

  653. 

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

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

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

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

  658.     st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size);

  659. 

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

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

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

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

  664.     } else

  665. 	url_fskip(pb, atom.size);

  666. 

  667.     return 0;

  668. }

  669. 

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

  671. {

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

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

  674.     int entries, i;

  675. 

  676.     print_atom("stco", atom);

  677. 

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

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

  680. 

  681.     entries = get_be32(pb);

  682.     sc->chunk_count = entries;

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

  684.     if (!sc->chunk_offsets)

  685.         return -1;

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

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

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

  689.         }

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

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

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

  693.         }

  694.     } else

  695.         return -1;

  696. #ifdef DEBUG

  697. /*

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

  699.         printf("chunk offset=0x%Lx\n", sc->chunk_offsets[i]);

  700.     }

  701. */

  702. #endif

  703.     return 0;

  704. }

  705. 

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

  707. {

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

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

  710.     int entries, frames_per_sample;

  711.     uint32_t format;

  712. 

  713.     print_atom("stsd", atom);

  714. 

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

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

  717. 

  718.     entries = get_be32(pb);

  719. 

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

  721.         enum CodecID id;

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

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

  724. 

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

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

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

  728. 

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

  730.         id = codec_get_id(mov_video_tags, format);

  731.         if (id >= 0) {

  732.             AVCodec *codec;

  733. 	    codec = avcodec_find_decoder(id);

  734.             if (codec)

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

  736.         }

  737. #ifdef DEBUG

  738.         printf("size=%d 4CC= %c%c%c%c codec_type=%d\n",

  739.                size,

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

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

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

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

  744.                st->codec.codec_type);

  745. #endif

  746. 	st->codec.codec_tag = format;

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

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

  749.             st->codec.codec_id = id;

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

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

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

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

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

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

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

  757. #if 1

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

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

  760.                    we ignore this info */

  761.                 st->codec.width = 0;

  762.                 st->codec.height = 0;

  763.             }

  764. #endif

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

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

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

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

  769. #ifdef DEBUG

  770. 	    printf("frames/samples = %d\n", frames_per_sample);

  771. #endif

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

  773. 

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

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

  776. 

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

  778.             st->codec.frame_rate      = 25;

  779.             st->codec.frame_rate_base = 1;

  780. */

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

  782. #if 0

  783. 	    while (size >= 8) {

  784. 		MOV_atom_t a;

  785.                 int64_t start_pos;

  786. 

  787. 		a.size = get_be32(pb);

  788. 		a.type = get_le32(pb);

  789. 		size -= 8;

  790. #ifdef DEBUG

  791.                 printf("VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",

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

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

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

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

  796. 		       a.size, size);

  797. #endif

  798.                 start_pos = url_ftell(pb);

  799. 

  800. 		switch(a.type) {

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

  802.                     {

  803.                         int tag, len;

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

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

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

  807.                         if (tag == 0x03) {

  808.                             /* MP4ESDescrTag */

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

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

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

  812.                             if (tag != 0x04)

  813.                                 goto fail;

  814.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  820.                             if (tag != 0x05)

  821.                                 goto fail;

  822.                             /* MP4DecSpecificDescrTag */

  823. #ifdef DEBUG

  824.                             printf("Specific MPEG4 header len=%d\n", len);

  825. #endif

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

  827.                             if (sc->header_data) {

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

  829. 				sc->header_len = len;

  830.                             }

  831.                         }

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

  833.                     }

  834.                     break;

  835.                 default:

  836.                     break;

  837.                 }

  838. 	    fail:

  839. 		printf("ATOMENEWSIZE %Ld   %d\n", atom.size, url_ftell(pb) - start_pos);

  840. 		if (atom.size > 8) {

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

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

  843. 		    size -= atom.size - 8;

  844. 		}

  845. 	    }

  846.             if (size > 0) {

  847.                 /* unknown extension */

  848.                 url_fskip(pb, size);

  849.             }

  850. #else

  851.             a.size = size;

  852. 	    mov_read_default(c, pb, a);

  853. #endif

  854. 	} else {

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

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

  857. 	    {

  858. #ifdef DEBUG

  859.                printf("AMR-NB or AMR-WB audio identified!!\n");

  860. #endif

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

  862.                get_be16(pb);//Reserved_2

  863.                get_be16(pb);//Reserved_2

  864.                get_be32(pb);//Reserved_4

  865.                get_be16(pb);//TimeScale

  866.                get_be16(pb);//Reserved_2

  867. 

  868.                 //AMRSpecificBox.(10 bytes)

  869.                

  870.                get_be32(pb); //size

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

  872.                get_be32(pb); //vendor

  873.                get_byte(pb); //decoder version

  874.                get_be16(pb); //mode_set

  875.                get_byte(pb); //mode_change_period

  876.                get_byte(pb); //frames_per_sample

  877. 

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

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

  880.                {

  881.                    st->codec.sample_rate=8000;

  882.                    st->codec.channels=1;

  883.                }

  884.                else //AMR-WB

  885.                {

  886.                    st->codec.sample_rate=16000;

  887.                    st->codec.channels=1;

  888.                }

  889.                st->codec.bits_per_sample=16;

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

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

  892. 	    }

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

  894.             {

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

  896.                 //Do some mp4 auto detect.

  897.                 c->mp4=1;

  898.                 size-=(16);

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

  900.             }

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

  902. 	    {//16 bytes read, reading atleast 20 more

  903. #ifdef DEBUG

  904.                 printf("audio size=0x%X\n",size);

  905. #endif

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

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

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

  909. 

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

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

  912. 

  913.                 /* handle specific s8 codec */

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

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

  916. 

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

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

  919. 

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

  921. 	        case CODEC_ID_PCM_S16BE:

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

  923. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  924.                     /* fall */

  925. 	        case CODEC_ID_PCM_U8:

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

  927. 		    break;

  928. 	        default:

  929.                     ;

  930. 	        }

  931. 

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

  933. #ifdef DEBUG

  934.                 printf("version =%d mp4=%d\n",version,c->mp4);

  935.                 printf("size-(16+20+16)=%d\n",size-(16+20+16));

  936. #endif

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

  938.                 {

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

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

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

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

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

  944.                     {

  945.                         //Optional, additional atom-based fields

  946. #ifdef DEBUG

  947.                         printf("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 ),

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

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

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

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

  952. #endif

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

  954.                         mov_read_default(c, pb, a);

  955.                     }

  956.                 }

  957.                 else

  958.                 {

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

  960.                     size-=(16+20);

  961. #ifdef DEBUG

  962.                     if(size>0)

  963.                         printf("skipping 0x%X bytes\n",size-(16+20));

  964. #endif

  965.                     url_fskip(pb, size);

  966.                 }

  967.             }

  968.             else

  969.             {

  970.                 size-=16;

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

  972. #ifdef DEBUG

  973.                 printf("Strange size, skipping 0x%X bytes\n",size);

  974. #endif

  975.                 url_fskip(pb, size);

  976.             }

  977.         }

  978.     }

  979. 

  980.     return 0;

  981. }

  982. 

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

  984. {

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

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

  987.     int entries, i;

  988. 

  989.     print_atom("stsc", atom);

  990. 

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

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

  993. 

  994.     entries = get_be32(pb);

  995. #ifdef DEBUG

  996. printf("track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  997. #endif

  998.     sc->sample_to_chunk_sz = entries;

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

  1000.     if (!sc->sample_to_chunk)

  1001.         return -1;

  1002.     for(i=0; i<entries; i++) {

  1003.         sc->sample_to_chunk[i].first = get_be32(pb);

  1004.         sc->sample_to_chunk[i].count = get_be32(pb);

  1005.         sc->sample_to_chunk[i].id = get_be32(pb);

  1006. #ifdef DEBUG

  1007. /*        printf("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); */

  1008. #endif

  1009.     }

  1010.     return 0;

  1011. }

  1012. 

  1013. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1014. {

  1015.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1016.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1017.     int entries, i;

  1018. 

  1019.     print_atom("stsz", atom);

  1020. 

  1021.     get_byte(pb); /* version */

  1022.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1023. 

  1024.     sc->sample_size = get_be32(pb);

  1025.     entries = get_be32(pb);

  1026.     sc->sample_count = entries;

  1027. #ifdef DEBUG

  1028.     printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1029. #endif

  1030.     if(sc->sample_size)

  1031.         return 0; /* there isn't any table following */

  1032.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1033.     if (!sc->sample_sizes)

  1034.         return -1;

  1035.     for(i=0; i<entries; i++) {

  1036.         sc->sample_sizes[i] = get_be32(pb);

  1037. #ifdef DEBUG

  1038. /*        printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  1039. #endif

  1040.     }

  1041.     return 0;

  1042. }

  1043. 

  1044. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1045. {

  1046.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1047.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1048.     int entries, i;

  1049.     int duration=0;

  1050.     int total_sample_count=0;

  1051. 

  1052.     print_atom("stts", atom);

  1053. 

  1054.     get_byte(pb); /* version */

  1055.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1056.     entries = get_be32(pb);

  1057. 

  1058. 

  1059. #ifdef DEBUG

  1060. printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1061. #endif

  1062.     for(i=0; i<entries; i++) {

  1063.         int sample_duration;

  1064.         int sample_count;

  1065. 

  1066.         sample_count=get_be32(pb);

  1067.         sample_duration = get_be32(pb);

  1068. #ifdef DEBUG

  1069.         printf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1070. #endif

  1071.         duration+=sample_duration*sample_count;

  1072.         total_sample_count+=sample_count;

  1073. 

  1074. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1075. 

  1076.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1077.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1078.             st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1079. #ifdef DEBUG

  1080.             printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1081. #endif

  1082.         }

  1083. #endif

  1084.     }

  1085. 

  1086. #define MAX(a,b) a>b?a:b

  1087. #define MIN(a,b) a>b?b:a

  1088.     /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/

  1089.     if(duration>0)

  1090.     {

  1091.         //Find greatest common divisor to avoid overflow using the Euclidean Algorithm...

  1092.         uint32_t max=MAX(duration,total_sample_count);

  1093.         uint32_t min=MIN(duration,total_sample_count);

  1094.         uint32_t spare=max%min;

  1095. 

  1096.         while(spare!=0)

  1097.         {

  1098.             max=min;

  1099.             min=spare;

  1100.             spare=max%min;

  1101.         }

  1102.         

  1103.         duration/=min;

  1104.         total_sample_count/=min;

  1105. 

  1106.         //Only support constant frame rate. But lets calculate the average. Needed by .mp4-files created with nec e606 3g phone.

  1107.         //To get better precision, we use the duration as frame_rate_base

  1108. 

  1109.         st->codec.frame_rate_base=duration;

  1110.         st->codec.frame_rate = c->streams[c->total_streams]->time_scale * total_sample_count;

  1111. 

  1112. #ifdef DEBUG

  1113.         printf("FRAME RATE average (video or audio)= %f (tot sample count= %i ,tot dur= %i timescale=%d)\n", (float)st->codec.frame_rate/st->codec.frame_rate_base,total_sample_count,duration,c->streams[c->total_streams]->time_scale);

  1114. #endif

  1115.     }

  1116.     else

  1117.     {

  1118.         st->codec.frame_rate_base = 1;

  1119.         st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1120.     }

  1121. #undef MAX

  1122. #undef MIN

  1123.     return 0;

  1124. }

  1125. 

  1126. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1127. {

  1128.     AVStream *st;

  1129.     MOVStreamContext *sc;

  1130. 

  1131.     print_atom("trak", atom);

  1132. 

  1133.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1134.     if (!st) return -2;

  1135.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1136.     if (!sc) {

  1137. 	av_free(st);

  1138.         return -1;

  1139.     }

  1140. 

  1141.     sc->sample_to_chunk_index = -1;

  1142.     st->priv_data = sc;

  1143.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1144.     st->start_time = 0; /* XXX: check */

  1145.     st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;

  1146.     c->streams[c->fc->nb_streams-1] = sc;

  1147. 

  1148.     return mov_read_default(c, pb, atom);

  1149. }

  1150. 

  1151. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1152. {

  1153.     AVStream *st;

  1154. 

  1155.     print_atom("tkhd", atom);

  1156. 

  1157.     st = c->fc->streams[c->fc->nb_streams-1];

  1158. 

  1159.     get_byte(pb); /* version */

  1160. 

  1161.     get_byte(pb); get_byte(pb);

  1162.     get_byte(pb); /* flags */

  1163.     /*

  1164.     MOV_TRACK_ENABLED 0x0001

  1165.     MOV_TRACK_IN_MOVIE 0x0002

  1166.     MOV_TRACK_IN_PREVIEW 0x0004

  1167.     MOV_TRACK_IN_POSTER 0x0008

  1168.     */

  1169. 

  1170.     get_be32(pb); /* creation time */

  1171.     get_be32(pb); /* modification time */

  1172.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1173.     get_be32(pb); /* reserved */

  1174.     st->start_time = 0; /* check */

  1175.     st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */

  1176.     get_be32(pb); /* reserved */

  1177.     get_be32(pb); /* reserved */

  1178. 

  1179.     get_be16(pb); /* layer */

  1180.     get_be16(pb); /* alternate group */

  1181.     get_be16(pb); /* volume */

  1182.     get_be16(pb); /* reserved */

  1183. 

  1184.     url_fskip(pb, 36); /* display matrix */

  1185. 

  1186.     /* those are fixed-point */

  1187.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1188.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1189. 

  1190.     return 0;

  1191. }

  1192. 

  1193. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1194. /* like the files created with Adobe Premiere 5.0, for samples see */

  1195. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1196. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1197. {

  1198.     int err;

  1199. 

  1200. #ifdef DEBUG

  1201.     print_atom("wide", atom);

  1202.     debug_indent++;

  1203. #endif

  1204.     if (atom.size < 8)

  1205.         return 0; /* continue */

  1206.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1207.         url_fskip(pb, atom.size - 4);

  1208.         return 0;

  1209.     }

  1210.     atom.type = get_le32(pb);

  1211.     atom.offset += 8;

  1212.     atom.size -= 8;

  1213.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1214.         url_fskip(pb, atom.size);

  1215.         return 0;

  1216.     }

  1217.     err = mov_read_mdat(c, pb, atom);

  1218. #ifdef DEBUG

  1219.     debug_indent--;

  1220. #endif

  1221.     return err;

  1222. }

  1223. 

  1224. 

  1225. #ifdef CONFIG_ZLIB

  1226. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1227. {

  1228.     return -1;

  1229. }

  1230. 

  1231. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1232. {

  1233.     ByteIOContext ctx;

  1234.     uint8_t *cmov_data;

  1235.     uint8_t *moov_data; /* uncompressed data */

  1236.     long cmov_len, moov_len;

  1237.     int ret;

  1238. 

  1239.     print_atom("cmov", atom);

  1240. 

  1241.     get_be32(pb); /* dcom atom */

  1242.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1243.         return -1;

  1244.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1245.         dprintf("unknown compression for cmov atom !");

  1246.         return -1;

  1247.     }

  1248.     get_be32(pb); /* cmvd atom */

  1249.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1250.         return -1;

  1251.     moov_len = get_be32(pb); /* uncompressed size */

  1252.     cmov_len = atom.size - 6 * 4;

  1253. 

  1254.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1255.     if (!cmov_data)

  1256.         return -1;

  1257.     moov_data = (uint8_t *) av_malloc(moov_len);

  1258.     if (!moov_data) {

  1259.         av_free(cmov_data);

  1260.         return -1;

  1261.     }

  1262.     get_buffer(pb, cmov_data, cmov_len);

  1263.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1264.         return -1;

  1265.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1266.         return -1;

  1267.     ctx.buf_end = ctx.buffer + moov_len;

  1268.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1269.     atom.offset = 0;

  1270.     atom.size = moov_len;

  1271. #ifdef DEBUG

  1272.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1273. #endif

  1274.     ret = mov_read_default(c, &ctx, atom);

  1275.     av_free(moov_data);

  1276.     av_free(cmov_data);

  1277. 

  1278.     return ret;

  1279. }

  1280. #endif

  1281. 

  1282. static const MOVParseTableEntry mov_default_parse_table[] = {

  1283. /* mp4 atoms */

  1284. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1285. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1286. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1287. { MKTAG( 'c', 't', 't', 's' ), mov_read_leaf }, /* composition time to sample */

  1288. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1289. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1290. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1291. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1292. { MKTAG( 'e', 'l', 's', 't' ), mov_read_leaf },

  1293. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1294. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1295. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1296. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1297. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1298. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1299. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1300. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1301. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1302. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1303. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1304. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1305. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1306. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1307. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1308. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1309. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1310. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1311. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_default },

  1312. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1313. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorrenson extension ??? */

  1314. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1315. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1316. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1317. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1318. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1319. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1320. { MKTAG( 's', 't', 's', 's' ), mov_read_leaf }, /* sync sample */

  1321. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1322. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1323. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1324. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1325. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1326. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1327. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1328. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1329. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },

  1330. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1331. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1332. /* extra mp4 */

  1333. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1334. /* QT atoms */

  1335. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1336. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1337. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1338. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1339. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1340. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1341. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1342. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1343. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1344. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1345. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1346. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1347. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1348. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1349. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1350. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1351. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1352. #ifdef CONFIG_ZLIB

  1353. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1354. #else

  1355. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1356. #endif

  1357. { 0L, mov_read_leaf }

  1358. };

  1359. 

  1360. static void mov_free_stream_context(MOVStreamContext *sc)

  1361. {

  1362.     if(sc) {

  1363.         av_free(sc->chunk_offsets);

  1364.         av_free(sc->sample_to_chunk);

  1365.         av_free(sc->sample_sizes);

  1366.         av_free(sc->header_data);

  1367.         av_free(sc);

  1368.     }

  1369. }

  1370. 

  1371. static inline uint32_t mov_to_tag(uint8_t *buf)

  1372. {

  1373.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1374. }

  1375. 

  1376. static inline uint32_t to_be32(uint8_t *buf)

  1377. {

  1378.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1379. }

  1380. 

  1381. /* XXX: is it sufficient ? */

  1382. static int mov_probe(AVProbeData *p)

  1383. {

  1384.     unsigned int offset;

  1385.     uint32_t tag;

  1386. 

  1387.     /* check file header */

  1388.     if (p->buf_size <= 12)

  1389.         return 0;

  1390.     offset = 0;

  1391.     for(;;) {

  1392.         /* ignore invalid offset */

  1393.         if ((offset + 8) > (unsigned int)p->buf_size)

  1394.             return 0;

  1395.         tag = mov_to_tag(p->buf + offset + 4);

  1396.         switch(tag) {

  1397.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1398.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1399.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1400.         case MKTAG( 'm', 'd', 'a', 't' ):

  1401.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1402.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1403.             return AVPROBE_SCORE_MAX;

  1404.         case MKTAG( 'f', 't', 'y', 'p' ):

  1405.         case MKTAG( 's', 'k', 'i', 'p' ):

  1406.             offset = to_be32(p->buf+offset) + offset;

  1407.             break;

  1408.         default:

  1409.             /* unrecognized tag */

  1410.             return 0;

  1411.         }

  1412.     }

  1413.     return 0;

  1414. }

  1415. 

  1416. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1417. {

  1418.     MOVContext *mov = (MOVContext *) s->priv_data;

  1419.     ByteIOContext *pb = &s->pb;

  1420.     int i, j, nb, err;

  1421.     MOV_atom_t atom = { 0, 0, 0 };

  1422. 

  1423.     mov->fc = s;

  1424.     mov->parse_table = mov_default_parse_table;

  1425. #if 0

  1426.     /* XXX: I think we should auto detect */

  1427.     if(s->iformat->name[1] == 'p')

  1428.         mov->mp4 = 1;

  1429. #endif

  1430.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1431. 	atom.size = url_filesize(url_fileno(pb));

  1432.     else

  1433. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1434. 

  1435. #ifdef DEBUG

  1436.     printf("filesz=%Ld\n", atom.size);

  1437. #endif

  1438. 

  1439.     /* check MOV header */

  1440.     err = mov_read_default(mov, pb, atom);

  1441.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1442. 	fprintf(stderr, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1443. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1444. 	return -1;

  1445.     }

  1446. #ifdef DEBUG

  1447.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1448. #endif

  1449.     /* some cleanup : make sure we are on the mdat atom */

  1450.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1451.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1452. 

  1453.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1454. 

  1455. #ifdef DEBUG

  1456.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1457. #endif

  1458. 

  1459. #ifdef DEBUG

  1460.     printf("streams= %d\n", s->nb_streams);

  1461. #endif

  1462.     mov->total_streams = nb = s->nb_streams;

  1463. 

  1464. #if 1

  1465.     for(i=0; i<s->nb_streams;) {

  1466.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1467.             av_free(s->streams[i]);

  1468.             for(j=i+1; j<s->nb_streams; j++)

  1469.                 s->streams[j-1] = s->streams[j];

  1470.             s->nb_streams--;

  1471.         } else

  1472.             i++;

  1473.     }

  1474.     for(i=0; i<s->nb_streams;i++) {

  1475.         MOVStreamContext *sc;

  1476.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1477.         sc->ffindex = i;

  1478.         sc->is_ff_stream = 1;

  1479.     }

  1480. #endif

  1481. #ifdef DEBUG

  1482.     printf("real streams= %d\n", s->nb_streams);

  1483. #endif

  1484.     return 0;

  1485. }

  1486. 

  1487. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1488. /* XXX:remove useless commented code sometime */

  1489. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1490. {

  1491.     MOVContext *mov = (MOVContext *) s->priv_data;

  1492.     MOVStreamContext *sc;

  1493.     int64_t offset = 0x0FFFFFFFFFFFFFFFLL;

  1494.     int i;

  1495.     int size;

  1496.     size = 0x0FFFFFFF;

  1497. 

  1498. #ifdef MOV_SPLIT_CHUNKS

  1499.     if (mov->partial) {

  1500. 

  1501.         int idx;

  1502. 

  1503. 	sc = mov->partial;

  1504. 	idx = sc->sample_to_chunk_index;

  1505. 

  1506.         if (idx < 0) return 0;

  1507. 	size = sc->sample_sizes[sc->current_sample];

  1508. 

  1509.         sc->current_sample++;

  1510.         sc->left_in_chunk--;

  1511. 

  1512.         if (sc->left_in_chunk <= 0)

  1513.             mov->partial = 0;

  1514.         offset = mov->next_chunk_offset;

  1515.         /* extract the sample */

  1516. 

  1517.         goto readchunk;

  1518.     }

  1519. #endif

  1520. 

  1521. again:

  1522.     sc = 0;

  1523.     for(i=0; i<mov->total_streams; i++) {

  1524. 	MOVStreamContext *msc = mov->streams[i];

  1525. 	//printf("MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1526.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1527. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1528. 	    sc = msc;

  1529. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1530. 	    //printf("SELETED  %Ld  i:%d\n", offset, i);

  1531.         }

  1532.     }

  1533.     if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)

  1534. 	return -1;

  1535. 

  1536.     sc->next_chunk++;

  1537. 

  1538.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1539.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1540.         mov->next_chunk_offset = offset;

  1541.     }

  1542. 

  1543. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1544.     if(!sc->is_ff_stream) {

  1545.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1546.         mov->next_chunk_offset = offset;

  1547. 	offset = 0x0FFFFFFFFFFFFFFFLL;

  1548.         goto again;

  1549.     }

  1550. 

  1551.     /* now get the chunk size... */

  1552. 

  1553.     for(i=0; i<mov->total_streams; i++) {

  1554. 	MOVStreamContext *msc = mov->streams[i];

  1555. 	if ((msc->next_chunk < msc->chunk_count)

  1556. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1557. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1558.     }

  1559. 

  1560. #ifdef MOV_MINOLTA_FIX

  1561.     //Make sure that size is according to sample_size (Needed by .mov files 

  1562.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1563.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1564.     //but I have no such movies

  1565.     if (sc->sample_size > 0) { 

  1566.         int foundsize=0;

  1567.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1568.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) && (sc->sample_size>0) )

  1569.             {

  1570.                 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1571.             }

  1572. #ifdef DEBUG

  1573.             /*printf("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);*/

  1574. #endif

  1575.         }

  1576.         if( (foundsize>0) && (foundsize<size) )

  1577.         {

  1578. #ifdef DEBUG

  1579.             /*printf("this size should actually be %d\n",foundsize);*/

  1580. #endif

  1581.             size=foundsize;

  1582.         }

  1583.     }

  1584. #endif //MOV_MINOLTA_FIX

  1585. 

  1586. #ifdef MOV_SPLIT_CHUNKS

  1587.     /* split chunks into samples */

  1588.     if (sc->sample_size == 0) {

  1589.         int idx = sc->sample_to_chunk_index;

  1590.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1591. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1592.            idx++;

  1593.         sc->sample_to_chunk_index = idx;

  1594.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1595. 	    mov->partial = sc;

  1596.             /* we'll have to get those samples before next chunk */

  1597.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1598.             size = sc->sample_sizes[sc->current_sample];

  1599.         }

  1600. 

  1601.         sc->current_sample++;

  1602.     }

  1603. #endif

  1604. 

  1605. readchunk:

  1606. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1607.     if(size == 0x0FFFFFFF)

  1608.         size = mov->mdat_size + mov->mdat_offset - offset;

  1609.     if(size < 0)

  1610.         return -1;

  1611.     if(size == 0)

  1612.         return -1;

  1613.     url_fseek(&s->pb, offset, SEEK_SET);

  1614. 

  1615.     //printf("READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1616.     if (sc->header_len > 0) {

  1617.         av_new_packet(pkt, size + sc->header_len);

  1618.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1619.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1620.         /* free header */

  1621.         av_freep(&sc->header_data);

  1622.         sc->header_len = 0;

  1623.     } else {

  1624.         av_new_packet(pkt, size);

  1625.         get_buffer(&s->pb, pkt->data, pkt->size);

  1626.     }

  1627.     pkt->stream_index = sc->ffindex;

  1628. 

  1629. #ifdef DEBUG

  1630. /*

  1631.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1632.     for(i=0; i<8; i++)

  1633.         printf("%02x ", pkt->data[i]);

  1634.     for(i=0; i<8; i++)

  1635.         printf("%c ", (pkt->data[i]) & 0x7F);

  1636.     puts("");

  1637. */

  1638. #endif

  1639. 

  1640.     mov->next_chunk_offset = offset + size;

  1641. 

  1642.     return 0;

  1643. }

  1644. 

  1645. static int mov_read_close(AVFormatContext *s)

  1646. {

  1647.     int i;

  1648.     MOVContext *mov = (MOVContext *) s->priv_data;

  1649.     for(i=0; i<mov->total_streams; i++)

  1650.         mov_free_stream_context(mov->streams[i]);

  1651.     for(i=0; i<s->nb_streams; i++)

  1652. 	av_freep(&s->streams[i]);

  1653.     /* free color tabs */

  1654.     for(i=0; i<mov->ctab_size; i++)

  1655. 	av_freep(&mov->ctab[i]);

  1656.     av_freep(&mov->ctab);

  1657.     return 0;

  1658. }

  1659. 

  1660. static AVInputFormat mov_iformat = {

  1661.     "mov",

  1662.     "QuickTime/MPEG4 format",

  1663.     sizeof(MOVContext),

  1664.     mov_probe,

  1665.     mov_read_header,

  1666.     mov_read_packet,

  1667.     mov_read_close,

  1668. };

  1669. 

  1670. int mov_init(void)

  1671. {

  1672.     av_register_input_format(&mov_iformat);

  1673.     return 0;

  1674. }