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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_NONE, 0 },

  102. };

  103. 

  104. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  115. 

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

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

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

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

  120. /* MP4 tags */

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

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

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

  124.     { CODEC_ID_NONE, 0 },

  125. };

  126. 

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

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

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

  130.  */

  131. 

  132. typedef struct MOV_sample_to_chunk_tbl {

  133.     long first;

  134.     long count;

  135.     long id;

  136. } MOV_sample_to_chunk_tbl;

  137. 

  138. typedef struct {

  139.     uint32_t type;

  140.     int64_t offset;

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

  142. } MOV_atom_t;

  143. 

  144. typedef struct {

  145.     int seed;

  146.     int flags;

  147.     int size;

  148.     void* clrs;

  149. } MOV_ctab_t;

  150. 

  151. typedef struct {

  152.     uint8_t  version;

  153.     uint32_t flags; // 24bit

  154. 

  155.     /* 0x03 ESDescrTag */

  156.     uint16_t es_id;

  157. #define MP4ODescrTag			0x01

  158. #define MP4IODescrTag			0x02

  159. #define MP4ESDescrTag			0x03

  160. #define MP4DecConfigDescrTag		0x04

  161. #define MP4DecSpecificDescrTag		0x05

  162. #define MP4SLConfigDescrTag		0x06

  163. #define MP4ContentIdDescrTag		0x07

  164. #define MP4SupplContentIdDescrTag	0x08

  165. #define MP4IPIPtrDescrTag		0x09

  166. #define MP4IPMPPtrDescrTag		0x0A

  167. #define MP4IPMPDescrTag			0x0B

  168. #define MP4RegistrationDescrTag		0x0D

  169. #define MP4ESIDIncDescrTag		0x0E

  170. #define MP4ESIDRefDescrTag		0x0F

  171. #define MP4FileIODescrTag		0x10

  172. #define MP4FileODescrTag		0x11

  173. #define MP4ExtProfileLevelDescrTag	0x13

  174. #define MP4ExtDescrTagsStart		0x80

  175. #define MP4ExtDescrTagsEnd		0xFE

  176.     uint8_t  stream_priority;

  177. 

  178.     /* 0x04 DecConfigDescrTag */

  179.     uint8_t  object_type_id;

  180.     uint8_t  stream_type;

  181.     /* XXX: really streamType is

  182.      * only 6bit, followed by:

  183.      * 1bit  upStream

  184.      * 1bit  reserved

  185.      */

  186.     uint32_t buffer_size_db; // 24

  187.     uint32_t max_bitrate;

  188.     uint32_t avg_bitrate;

  189. 

  190.     /* 0x05 DecSpecificDescrTag */

  191.     uint8_t  decoder_cfg_len;

  192.     uint8_t *decoder_cfg;

  193. 

  194.     /* 0x06 SLConfigDescrTag */

  195.     uint8_t  sl_config_len;

  196.     uint8_t *sl_config;

  197. } MOV_esds_t;

  198. 

  199. struct MOVParseTableEntry;

  200. 

  201. typedef struct MOVStreamContext {

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

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

  204.     long next_chunk;

  205.     long chunk_count;

  206.     int64_t *chunk_offsets;

  207.     long sample_to_chunk_sz;

  208.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  209.     long sample_to_chunk_index;

  210.     long sample_size;

  211.     long sample_count;

  212.     long *sample_sizes;

  213.     int time_scale;

  214.     long current_sample;

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

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

  217.     int header_len;

  218.     uint8_t *header_data;

  219.     MOV_esds_t esds;

  220. } MOVStreamContext;

  221. 

  222. typedef struct MOVContext {

  223.     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) */

  224.     AVFormatContext *fc;

  225.     int time_scale;

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

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

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

  229.     int64_t mdat_size;

  230.     int64_t mdat_offset;

  231.     int total_streams;

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

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

  234.      */

  235.     MOVStreamContext *streams[MAX_STREAMS];

  236. 

  237.     int64_t next_chunk_offset;

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

  239.     int ctab_size;

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

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

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

  243. } MOVContext;

  244. 

  245. 

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

  247. 

  248. /* those functions parse an atom */

  249. /* return code:

  250.  1: found what I wanted, exit

  251.  0: continue to parse next atom

  252.  -1: error occured, exit

  253.  */

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

  255. 

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

  257. typedef struct MOVParseTableEntry {

  258.     uint32_t type;

  259.     mov_parse_function func;

  260. } MOVParseTableEntry;

  261. 

  262. #ifdef DEBUG

  263. /*

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

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

  266.  */

  267. static int debug_indent = 0;

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

  269. {

  270.     unsigned int tag, i;

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

  272.     i=debug_indent;

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

  274.     while(i--)

  275.         printf("|");

  276.     printf("parse:");

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

  278.            str, tag & 0xff,

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

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

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

  282.            (unsigned int)atom.offset,

  283. 	   (unsigned int)atom.size);

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

  285. }

  286. #else

  287. #define print_atom(a,b)

  288. #endif

  289. 

  290. 

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

  292. {

  293.     print_atom("leaf", atom);

  294. 

  295.     if (atom.size>1)

  296.         url_fskip(pb, atom.size);

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

  298.     return 0;

  299. }

  300. 

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

  302. {

  303.     int64_t total_size = 0;

  304.     MOV_atom_t a;

  305.     int i;

  306.     int err = 0;

  307. 

  308. #ifdef DEBUG

  309.     print_atom("default", atom);

  310.     debug_indent++;

  311. #endif

  312. 

  313.     a.offset = atom.offset;

  314. 

  315.     if (atom.size < 0)

  316. 	atom.size = 0x7fffffffffffffffLL;

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

  318. 	a.size = atom.size;

  319. 	a.type=0L;

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

  321. 	    a.size = get_be32(pb);

  322.             a.type = get_le32(pb);

  323.         }

  324. 	total_size += 8;

  325.         a.offset += 8;

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

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

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

  329.             a.offset += 8;

  330.             total_size += 8;

  331.         }

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

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

  334. 	    if (a.size <= 8)

  335.                 break;

  336. 	}

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

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

  339. 	    /* empty */;

  340. 

  341. 	a.size -= 8;

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

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

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

  345. #ifdef DEBUG

  346.             print_atom("unknown", a);

  347. #endif

  348.             url_fskip(pb, a.size);

  349. 	} else {

  350. #ifdef DEBUG

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

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

  353. #endif

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

  355. 	}

  356. 

  357. 	a.offset += a.size;

  358.         total_size += a.size;

  359.     }

  360. 

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

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

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

  364.     }

  365. 

  366. #ifdef DEBUG

  367.     debug_indent--;

  368. #endif

  369.     return err;

  370. }

  371. 

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

  373. {

  374.     unsigned int len;

  375.     MOV_ctab_t *t;

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

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

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

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

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

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

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

  383.     if (len > 0) {

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

  385. 	if (t->clrs)

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

  387.     }

  388. 

  389.     return 0;

  390. }

  391. 

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

  393. {

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

  395.     int len = 0;

  396.     uint32_t type;

  397.     uint32_t ctype;

  398. 

  399.     print_atom("hdlr", atom);

  400. 

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

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

  403. 

  404.     /* component type */

  405.     ctype = get_le32(pb);

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

  407. 

  408. #ifdef DEBUG

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

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

  411. #endif

  412. #ifdef DEBUG

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

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

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

  416.             puts("hdlr: vide");

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

  418.             puts("hdlr: soun");

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

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

  421.             puts("hdlr: vide");

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

  423.             puts("hdlr: soun");

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

  425.             puts("hdlr: odsm");

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

  427.             puts("hdlr: sdsm");

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

  429. #endif

  430. 

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

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

  433.         c->mp4 = 0;

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

  435.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  437.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  440.         c->mp4 = 1;

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

  442.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  444.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  445.     }

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

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

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

  449. 

  450.     if(atom.size <= 24)

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

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

  453.     /* component name */

  454. 

  455.     if(c->mp4) {

  456.         /* .mp4: C string */

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

  458.     } else {

  459.         /* .mov: PASCAL string */

  460. #ifdef DEBUG

  461.         char* buf;

  462. #endif

  463.         len = get_byte(pb);

  464. #ifdef DEBUG

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

  466. 	if (buf) {

  467. 	    get_buffer(pb, buf, len);

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

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

  470. 	    av_free(buf);

  471. 	} else

  472. #endif

  473. 	    url_fskip(pb, len);

  474.     }

  475. 

  476.     return 0;

  477. }

  478. 

  479. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  480. {

  481.     int len = 0;

  482.     int count = 4;

  483.     while (count--) {

  484.         int c = get_byte(pb);

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

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

  487. 	    break;

  488.     }

  489.     return len;

  490. }

  491. 

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

  493. {

  494.     int len;

  495.     *tag = get_byte(pb);

  496.     len = mov_mp4_read_descr_len(pb);

  497. #ifdef DEBUG

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

  499. #endif

  500.     return len;

  501. }

  502. 

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

  504. {

  505.     unsigned int val;

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

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

  508.     val |= get_byte(s);

  509.     return val;

  510. }

  511. 

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

  513. {

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

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

  516.     int64_t start_pos = url_ftell(pb);

  517.     int tag, len;

  518. 

  519.     print_atom("esds", atom);

  520. 

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

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

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

  524.     if (tag == MP4ESDescrTag) {

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

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

  527.     } else

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

  529. 

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

  531.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  537. 

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

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

  540. 	if (tag == MP4DecSpecificDescrTag) {

  541. #ifdef DEBUG

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

  543. #endif

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

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

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

  547. 		st->codec.extradata_size = len;

  548. 	    }

  549. 	}

  550.     }

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

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

  553.     return 0;

  554. }

  555. 

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

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

  558. {

  559.     print_atom("mdat", atom);

  560. 

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

  562.         return 0;

  563.     c->found_mdat=1;

  564.     c->mdat_offset = atom.offset;

  565.     c->mdat_size = atom.size;

  566.     if(c->found_moov)

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

  568.     url_fskip(pb, atom.size);

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

  570. }

  571. 

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

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

  574. {

  575.     int err;

  576. 

  577.     print_atom("moov", atom);

  578. 

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

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

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

  582.     c->found_moov=1;

  583.     if(c->found_mdat)

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

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

  586. }

  587. 

  588. 

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

  590. {

  591.     print_atom("mdhd", atom);

  592. 

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

  594. 

  595.     get_byte(pb); get_byte(pb);

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

  597. 

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

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

  600. 

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

  602. 

  603. #ifdef DEBUG

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

  605. #endif

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

  607. 

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

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

  610. 

  611.     return 0;

  612. }

  613. 

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

  615. {

  616.     print_atom("mvhd", atom);

  617. 

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

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

  620. 

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

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

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

  624. #ifdef DEBUG

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

  626. #endif

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

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

  629. 

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

  631. 

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

  633. 

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

  635. 

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

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

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

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

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

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

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

  643. 

  644.     return 0;

  645. }

  646. 

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

  648. {

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

  650. 

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

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

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

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

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

  656. 

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

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

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

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

  661.     } else

  662. 	url_fskip(pb, atom.size);

  663. 

  664.     return 0;

  665. }

  666. 

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

  668. {

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

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

  671.     int entries, i;

  672. 

  673.     print_atom("stco", atom);

  674. 

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

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

  677. 

  678.     entries = get_be32(pb);

  679.     sc->chunk_count = entries;

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

  681.     if (!sc->chunk_offsets)

  682.         return -1;

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

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

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

  686.         }

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

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

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

  690.         }

  691.     } else

  692.         return -1;

  693. #ifdef DEBUG

  694. /*

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

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

  697.     }

  698. */

  699. #endif

  700.     return 0;

  701. }

  702. 

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

  704. {

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

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

  707.     int entries, frames_per_sample;

  708.     uint32_t format;

  709. 

  710.     print_atom("stsd", atom);

  711. 

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

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

  714. 

  715.     entries = get_be32(pb);

  716. 

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

  718.         enum CodecID id;

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

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

  721. 

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

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

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

  725. 

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

  727.         id = codec_get_id(mov_video_tags, format);

  728.         if (id >= 0) {

  729.             AVCodec *codec;

  730. 	    codec = avcodec_find_decoder(id);

  731.             if (codec)

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

  733.         }

  734. #ifdef DEBUG

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

  736.                size,

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

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

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

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

  741.                st->codec.codec_type);

  742. #endif

  743. 	st->codec.codec_tag = format;

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

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

  746.             st->codec.codec_id = id;

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

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

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

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

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

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

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

  754. #if 1

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

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

  757.                    we ignore this info */

  758.                 st->codec.width = 0;

  759.                 st->codec.height = 0;

  760.             }

  761. #endif

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

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

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

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

  766. #ifdef DEBUG

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

  768. #endif

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

  770. 

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

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

  773. 

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

  775.             st->codec.frame_rate      = 25;

  776.             st->codec.frame_rate_base = 1;

  777. */

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

  779. #if 0

  780. 	    while (size >= 8) {

  781. 		MOV_atom_t a;

  782.                 int64_t start_pos;

  783. 

  784. 		a.size = get_be32(pb);

  785. 		a.type = get_le32(pb);

  786. 		size -= 8;

  787. #ifdef DEBUG

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

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

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

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

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

  793. 		       a.size, size);

  794. #endif

  795.                 start_pos = url_ftell(pb);

  796. 

  797. 		switch(a.type) {

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

  799.                     {

  800.                         int tag, len;

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

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

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

  804.                         if (tag == 0x03) {

  805.                             /* MP4ESDescrTag */

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

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

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

  809.                             if (tag != 0x04)

  810.                                 goto fail;

  811.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  817.                             if (tag != 0x05)

  818.                                 goto fail;

  819.                             /* MP4DecSpecificDescrTag */

  820. #ifdef DEBUG

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

  822. #endif

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

  824.                             if (sc->header_data) {

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

  826. 				sc->header_len = len;

  827.                             }

  828.                         }

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

  830.                     }

  831.                     break;

  832.                 default:

  833.                     break;

  834.                 }

  835. 	    fail:

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

  837. 		if (atom.size > 8) {

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

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

  840. 		    size -= atom.size - 8;

  841. 		}

  842. 	    }

  843.             if (size > 0) {

  844.                 /* unknown extension */

  845.                 url_fskip(pb, size);

  846.             }

  847. #else

  848.             a.size = size;

  849. 	    mov_read_default(c, pb, a);

  850. #endif

  851. 	} else {

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

  853. 	    if(st->codec.codec_id==CODEC_ID_AMR_NB) //from TS26.244

  854. 	    {

  855. #ifdef DEBUG

  856.                printf("AMR-NB audio identified!!\n");

  857. #endif

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

  859.                get_be16(pb);//Reserved_2

  860.                get_be16(pb);//Reserved_2

  861.                get_be32(pb);//Reserved_4

  862.                get_be16(pb);//TimeScale

  863.                get_be16(pb);//Reserved_2

  864. 

  865.                 //AMRSpecificBox.(10 bytes)

  866.                 

  867. #ifdef DEBUG

  868.                int damr_size=

  869. #endif

  870.                get_be32(pb); //size

  871. #ifdef DEBUG

  872.                int damr_type=

  873. #endif

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

  875. #ifdef DEBUG

  876.                int damr_vendor=

  877. #endif

  878.                get_be32(pb); //vendor

  879.                get_byte(pb); //decoder version

  880.                get_be16(pb); //mode_set

  881.                get_byte(pb); //mode_change_period

  882.                get_byte(pb); //frames_per_sample

  883. 

  884. #ifdef DEBUG

  885.                printf("Audio: damr_type=%c%c%c%c damr_size=%d damr_vendor=%c%c%c%c\n",

  886.                        (damr_type >> 24) & 0xff,

  887.                        (damr_type >> 16) & 0xff,

  888.                        (damr_type >> 8) & 0xff,

  889.                        (damr_type >> 0) & 0xff,

  890. 		       damr_size, 

  891.                        (damr_vendor >> 24) & 0xff,

  892.                        (damr_vendor >> 16) & 0xff,

  893.                        (damr_vendor >> 8) & 0xff,

  894.                        (damr_vendor >> 0) & 0xff

  895. 		       );

  896. #endif

  897. 

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

  899.                st->codec.sample_rate=8000;

  900.                st->codec.channels=1;

  901.                st->codec.bits_per_sample=16;

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

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

  904. 	    }

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

  906.             {

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

  908.                 //Do some mp4 auto detect.

  909.                 c->mp4=1;

  910.                 size-=(16);

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

  912.             }

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

  914. 	    {//16 bytes read, reading atleast 20 more

  915. #ifdef DEBUG

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

  917. #endif

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

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

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

  921. 

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

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

  924. 

  925.                 /* handle specific s8 codec */

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

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

  928. 

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

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

  931. 

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

  933. 	        case CODEC_ID_PCM_S16BE:

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

  935. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  936.                     /* fall */

  937. 	        case CODEC_ID_PCM_U8:

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

  939. 		    break;

  940. 	        default:

  941.                     ;

  942. 	        }

  943. 

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

  945. #ifdef DEBUG

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

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

  948. #endif

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

  950.                 {

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

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

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

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

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

  956.                     {

  957.                         //Optional, additional atom-based fields

  958. #ifdef DEBUG

  959.                         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 ),

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

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

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

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

  964. #endif

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

  966.                         mov_read_default(c, pb, a);

  967.                     }

  968.                 }

  969.                 else

  970.                 {

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

  972.                     size-=(16+20);

  973. #ifdef DEBUG

  974.                     if(size>0)

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

  976. #endif

  977.                     url_fskip(pb, size);

  978.                 }

  979.             }

  980.             else

  981.             {

  982.                 size-=16;

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

  984. #ifdef DEBUG

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

  986. #endif

  987.                 url_fskip(pb, size);

  988.             }

  989.         }

  990.     }

  991. 

  992.     return 0;

  993. }

  994. 

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

  996. {

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

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

  999.     int entries, i;

  1000. 

  1001.     print_atom("stsc", atom);

  1002. 

  1003.     get_byte(pb); /* version */

  1004.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1005. 

  1006.     entries = get_be32(pb);

  1007. #ifdef DEBUG

  1008. printf("track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1009. #endif

  1010.     sc->sample_to_chunk_sz = entries;

  1011.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1012.     if (!sc->sample_to_chunk)

  1013.         return -1;

  1014.     for(i=0; i<entries; i++) {

  1015.         sc->sample_to_chunk[i].first = get_be32(pb);

  1016.         sc->sample_to_chunk[i].count = get_be32(pb);

  1017.         sc->sample_to_chunk[i].id = get_be32(pb);

  1018. #ifdef DEBUG

  1019. /*        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); */

  1020. #endif

  1021.     }

  1022.     return 0;

  1023. }

  1024. 

  1025. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1026. {

  1027.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1028.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1029.     int entries, i;

  1030. 

  1031.     print_atom("stsz", atom);

  1032. 

  1033.     get_byte(pb); /* version */

  1034.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1035. 

  1036.     sc->sample_size = get_be32(pb);

  1037.     entries = get_be32(pb);

  1038.     sc->sample_count = entries;

  1039. #ifdef DEBUG

  1040.     printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1041. #endif

  1042.     if(sc->sample_size)

  1043.         return 0; /* there isn't any table following */

  1044.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1045.     if (!sc->sample_sizes)

  1046.         return -1;

  1047.     for(i=0; i<entries; i++) {

  1048.         sc->sample_sizes[i] = get_be32(pb);

  1049. #ifdef DEBUG

  1050. /*        printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  1051. #endif

  1052.     }

  1053.     return 0;

  1054. }

  1055. 

  1056. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1057. {

  1058.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1059.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1060.     int entries, i;

  1061.     int duration=0;

  1062.     int total_sample_count=0;

  1063. 

  1064.     print_atom("stts", atom);

  1065. 

  1066.     get_byte(pb); /* version */

  1067.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1068.     entries = get_be32(pb);

  1069. 

  1070. 

  1071. #ifdef DEBUG

  1072. printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1073. #endif

  1074.     for(i=0; i<entries; i++) {

  1075.         int sample_duration;

  1076.         int sample_count;

  1077. 

  1078.         sample_count=get_be32(pb);

  1079.         sample_duration = get_be32(pb);

  1080. #ifdef DEBUG

  1081.         printf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1082. #endif

  1083.         duration+=sample_duration*sample_count;

  1084.         total_sample_count+=sample_count;

  1085. 

  1086. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1087. 

  1088.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1089.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1090.             st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1091. #ifdef DEBUG

  1092.             printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1093. #endif

  1094.         }

  1095. #endif

  1096.     }

  1097. 

  1098. #define MAX(a,b) a>b?a:b

  1099. #define MIN(a,b) a>b?b:a

  1100.     /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/

  1101.     if(duration>0)

  1102.     {

  1103.         //Find greatest common divisor to avoid overflow using the Euclidean Algorithm...

  1104.         uint32_t max=MAX(duration,total_sample_count);

  1105.         uint32_t min=MIN(duration,total_sample_count);

  1106.         uint32_t spare=max%min;

  1107. 

  1108.         while(spare!=0)

  1109.         {

  1110.             max=min;

  1111.             min=spare;

  1112.             spare=max%min;

  1113.         }

  1114.         

  1115.         duration/=min;

  1116.         total_sample_count/=min;

  1117. 

  1118.         //Only support constant frame rate. But lets calculate the average. Needed by .mp4-files created with nec e606 3g phone.

  1119.         //To get better precision, we use the duration as frame_rate_base

  1120. 

  1121.         st->codec.frame_rate_base=duration;

  1122.         st->codec.frame_rate = c->streams[c->total_streams]->time_scale * total_sample_count;

  1123. 

  1124. #ifdef DEBUG

  1125.         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);

  1126. #endif

  1127.     }

  1128.     else

  1129.     {

  1130.         st->codec.frame_rate_base = 1;

  1131.         st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1132.     }

  1133. #undef MAX

  1134. #undef MIN

  1135.     return 0;

  1136. }

  1137. 

  1138. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1139. {

  1140.     AVStream *st;

  1141.     MOVStreamContext *sc;

  1142. 

  1143.     print_atom("trak", atom);

  1144. 

  1145.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1146.     if (!st) return -2;

  1147.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1148.     if (!sc) {

  1149. 	av_free(st);

  1150.         return -1;

  1151.     }

  1152. 

  1153.     sc->sample_to_chunk_index = -1;

  1154.     st->priv_data = sc;

  1155.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1156.     st->start_time = 0; /* XXX: check */

  1157.     st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;

  1158.     c->streams[c->fc->nb_streams-1] = sc;

  1159. 

  1160.     return mov_read_default(c, pb, atom);

  1161. }

  1162. 

  1163. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1164. {

  1165.     AVStream *st;

  1166. 

  1167.     print_atom("tkhd", atom);

  1168. 

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

  1170. 

  1171.     get_byte(pb); /* version */

  1172. 

  1173.     get_byte(pb); get_byte(pb);

  1174.     get_byte(pb); /* flags */

  1175.     /*

  1176.     MOV_TRACK_ENABLED 0x0001

  1177.     MOV_TRACK_IN_MOVIE 0x0002

  1178.     MOV_TRACK_IN_PREVIEW 0x0004

  1179.     MOV_TRACK_IN_POSTER 0x0008

  1180.     */

  1181. 

  1182.     get_be32(pb); /* creation time */

  1183.     get_be32(pb); /* modification time */

  1184.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1185.     get_be32(pb); /* reserved */

  1186.     st->start_time = 0; /* check */

  1187.     st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */

  1188.     get_be32(pb); /* reserved */

  1189.     get_be32(pb); /* reserved */

  1190. 

  1191.     get_be16(pb); /* layer */

  1192.     get_be16(pb); /* alternate group */

  1193.     get_be16(pb); /* volume */

  1194.     get_be16(pb); /* reserved */

  1195. 

  1196.     url_fskip(pb, 36); /* display matrix */

  1197. 

  1198.     /* those are fixed-point */

  1199.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1200.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1201. 

  1202.     return 0;

  1203. }

  1204. 

  1205. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1206. /* like the files created with Adobe Premiere 5.0, for samples see */

  1207. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1208. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1209. {

  1210.     int err;

  1211. 

  1212. #ifdef DEBUG

  1213.     print_atom("wide", atom);

  1214.     debug_indent++;

  1215. #endif

  1216.     if (atom.size < 8)

  1217.         return 0; /* continue */

  1218.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1219.         url_fskip(pb, atom.size - 4);

  1220.         return 0;

  1221.     }

  1222.     atom.type = get_le32(pb);

  1223.     atom.offset += 8;

  1224.     atom.size -= 8;

  1225.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1226.         url_fskip(pb, atom.size);

  1227.         return 0;

  1228.     }

  1229.     err = mov_read_mdat(c, pb, atom);

  1230. #ifdef DEBUG

  1231.     debug_indent--;

  1232. #endif

  1233.     return err;

  1234. }

  1235. 

  1236. 

  1237. #ifdef CONFIG_ZLIB

  1238. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1239. {

  1240.     return -1;

  1241. }

  1242. 

  1243. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1244. {

  1245.     ByteIOContext ctx;

  1246.     uint8_t *cmov_data;

  1247.     uint8_t *moov_data; /* uncompressed data */

  1248.     long cmov_len, moov_len;

  1249.     int ret;

  1250. 

  1251.     print_atom("cmov", atom);

  1252. 

  1253.     get_be32(pb); /* dcom atom */

  1254.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1255.         return -1;

  1256.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1257.         dprintf("unknown compression for cmov atom !");

  1258.         return -1;

  1259.     }

  1260.     get_be32(pb); /* cmvd atom */

  1261.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1262.         return -1;

  1263.     moov_len = get_be32(pb); /* uncompressed size */

  1264.     cmov_len = atom.size - 6 * 4;

  1265. 

  1266.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1267.     if (!cmov_data)

  1268.         return -1;

  1269.     moov_data = (uint8_t *) av_malloc(moov_len);

  1270.     if (!moov_data) {

  1271.         av_free(cmov_data);

  1272.         return -1;

  1273.     }

  1274.     get_buffer(pb, cmov_data, cmov_len);

  1275.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1276.         return -1;

  1277.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1278.         return -1;

  1279.     ctx.buf_end = ctx.buffer + moov_len;

  1280.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1281.     atom.offset = 0;

  1282.     atom.size = moov_len;

  1283. #ifdef DEBUG

  1284.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1285. #endif

  1286.     ret = mov_read_default(c, &ctx, atom);

  1287.     av_free(moov_data);

  1288.     av_free(cmov_data);

  1289. 

  1290.     return ret;

  1291. }

  1292. #endif

  1293. 

  1294. static const MOVParseTableEntry mov_default_parse_table[] = {

  1295. /* mp4 atoms */

  1296. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1297. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1298. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1299. { MKTAG( 'c', 't', 't', 's' ), mov_read_leaf }, /* composition time to sample */

  1300. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1301. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1302. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1303. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1304. { MKTAG( 'e', 'l', 's', 't' ), mov_read_leaf },

  1305. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1306. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1307. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

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

  1309. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1310. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1311. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1312. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1313. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1314. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1315. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1316. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1317. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1318. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1319. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1320. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1321. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1322. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1323. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_default },

  1324. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1325. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorrenson extension ??? */

  1326. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1327. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1328. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1329. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1330. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1331. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1332. { MKTAG( 's', 't', 's', 's' ), mov_read_leaf }, /* sync sample */

  1333. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1334. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1335. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1336. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1337. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1338. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1339. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1340. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1341. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },

  1342. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1343. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1344. /* extra mp4 */

  1345. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1346. /* QT atoms */

  1347. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1348. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1349. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1350. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1351. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1352. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1353. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1354. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1355. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1356. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1357. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1358. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1359. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1360. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1361. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1362. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1363. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1364. #ifdef CONFIG_ZLIB

  1365. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1366. #else

  1367. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1368. #endif

  1369. { 0L, mov_read_leaf }

  1370. };

  1371. 

  1372. static void mov_free_stream_context(MOVStreamContext *sc)

  1373. {

  1374.     if(sc) {

  1375.         av_free(sc->chunk_offsets);

  1376.         av_free(sc->sample_to_chunk);

  1377.         av_free(sc->sample_sizes);

  1378.         av_free(sc->header_data);

  1379.         av_free(sc);

  1380.     }

  1381. }

  1382. 

  1383. static inline uint32_t mov_to_tag(uint8_t *buf)

  1384. {

  1385.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1386. }

  1387. 

  1388. static inline uint32_t to_be32(uint8_t *buf)

  1389. {

  1390.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1391. }

  1392. 

  1393. /* XXX: is it sufficient ? */

  1394. static int mov_probe(AVProbeData *p)

  1395. {

  1396.     unsigned int offset;

  1397.     uint32_t tag;

  1398. 

  1399.     /* check file header */

  1400.     if (p->buf_size <= 12)

  1401.         return 0;

  1402.     offset = 0;

  1403.     for(;;) {

  1404.         /* ignore invalid offset */

  1405.         if ((offset + 8) > (unsigned int)p->buf_size)

  1406.             return 0;

  1407.         tag = mov_to_tag(p->buf + offset + 4);

  1408.         switch(tag) {

  1409.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1410.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1411.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1412.         case MKTAG( 'm', 'd', 'a', 't' ):

  1413.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1414.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1415.             return AVPROBE_SCORE_MAX;

  1416.         case MKTAG( 'f', 't', 'y', 'p' ):

  1417.         case MKTAG( 's', 'k', 'i', 'p' ):

  1418.             offset = to_be32(p->buf+offset) + offset;

  1419.             break;

  1420.         default:

  1421.             /* unrecognized tag */

  1422.             return 0;

  1423.         }

  1424.     }

  1425.     return 0;

  1426. }

  1427. 

  1428. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1429. {

  1430.     MOVContext *mov = (MOVContext *) s->priv_data;

  1431.     ByteIOContext *pb = &s->pb;

  1432.     int i, j, nb, err;

  1433.     MOV_atom_t atom = { 0, 0, 0 };

  1434. 

  1435.     mov->fc = s;

  1436.     mov->parse_table = mov_default_parse_table;

  1437. #if 0

  1438.     /* XXX: I think we should auto detect */

  1439.     if(s->iformat->name[1] == 'p')

  1440.         mov->mp4 = 1;

  1441. #endif

  1442.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1443. 	atom.size = url_filesize(url_fileno(pb));

  1444.     else

  1445. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1446. 

  1447. #ifdef DEBUG

  1448.     printf("filesz=%Ld\n", atom.size);

  1449. #endif

  1450. 

  1451.     /* check MOV header */

  1452.     err = mov_read_default(mov, pb, atom);

  1453.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1454. 	fprintf(stderr, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1455. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1456. 	return -1;

  1457.     }

  1458. #ifdef DEBUG

  1459.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1460. #endif

  1461.     /* some cleanup : make sure we are on the mdat atom */

  1462.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1463.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1464. 

  1465.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1466. 

  1467. #ifdef DEBUG

  1468.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1469. #endif

  1470. 

  1471. #ifdef DEBUG

  1472.     printf("streams= %d\n", s->nb_streams);

  1473. #endif

  1474.     mov->total_streams = nb = s->nb_streams;

  1475. 

  1476. #if 1

  1477.     for(i=0; i<s->nb_streams;) {

  1478.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1479.             av_free(s->streams[i]);

  1480.             for(j=i+1; j<s->nb_streams; j++)

  1481.                 s->streams[j-1] = s->streams[j];

  1482.             s->nb_streams--;

  1483.         } else

  1484.             i++;

  1485.     }

  1486.     for(i=0; i<s->nb_streams;i++) {

  1487.         MOVStreamContext *sc;

  1488.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1489.         sc->ffindex = i;

  1490.         sc->is_ff_stream = 1;

  1491.     }

  1492. #endif

  1493. #ifdef DEBUG

  1494.     printf("real streams= %d\n", s->nb_streams);

  1495. #endif

  1496.     return 0;

  1497. }

  1498. 

  1499. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1500. /* XXX:remove useless commented code sometime */

  1501. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1502. {

  1503.     MOVContext *mov = (MOVContext *) s->priv_data;

  1504.     MOVStreamContext *sc;

  1505.     int64_t offset = 0x0FFFFFFFFFFFFFFFLL;

  1506.     int i;

  1507.     int size;

  1508.     size = 0x0FFFFFFF;

  1509. 

  1510. #ifdef MOV_SPLIT_CHUNKS

  1511.     if (mov->partial) {

  1512. 

  1513.         int idx;

  1514. 

  1515. 	sc = mov->partial;

  1516. 	idx = sc->sample_to_chunk_index;

  1517. 

  1518.         if (idx < 0) return 0;

  1519. 	size = sc->sample_sizes[sc->current_sample];

  1520. 

  1521.         sc->current_sample++;

  1522.         sc->left_in_chunk--;

  1523. 

  1524.         if (sc->left_in_chunk <= 0)

  1525.             mov->partial = 0;

  1526.         offset = mov->next_chunk_offset;

  1527.         /* extract the sample */

  1528. 

  1529.         goto readchunk;

  1530.     }

  1531. #endif

  1532. 

  1533. again:

  1534.     sc = 0;

  1535.     for(i=0; i<mov->total_streams; i++) {

  1536. 	MOVStreamContext *msc = mov->streams[i];

  1537. 	//printf("MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1538.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1539. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1540. 	    sc = msc;

  1541. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1542. 	    //printf("SELETED  %Ld  i:%d\n", offset, i);

  1543.         }

  1544.     }

  1545.     if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)

  1546. 	return -1;

  1547. 

  1548.     sc->next_chunk++;

  1549. 

  1550.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1551.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1552.         mov->next_chunk_offset = offset;

  1553.     }

  1554. 

  1555. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1556.     if(!sc->is_ff_stream) {

  1557.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1558.         mov->next_chunk_offset = offset;

  1559. 	offset = 0x0FFFFFFFFFFFFFFFLL;

  1560.         goto again;

  1561.     }

  1562. 

  1563.     /* now get the chunk size... */

  1564. 

  1565.     for(i=0; i<mov->total_streams; i++) {

  1566. 	MOVStreamContext *msc = mov->streams[i];

  1567. 	if ((msc->next_chunk < msc->chunk_count)

  1568. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1569. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1570.     }

  1571. 

  1572. #ifdef MOV_MINOLTA_FIX

  1573.     //Make sure that size is according to sample_size (Needed by .mov files 

  1574.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1575.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1576.     //but I have no such movies

  1577.     if (sc->sample_size > 0) { 

  1578.         int foundsize=0;

  1579.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1580.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) && (sc->sample_size>0) )

  1581.             {

  1582.                 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1583.             }

  1584. #ifdef DEBUG

  1585.             /*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);*/

  1586. #endif

  1587.         }

  1588.         if( (foundsize>0) && (foundsize<size) )

  1589.         {

  1590. #ifdef DEBUG

  1591.             /*printf("this size should actually be %d\n",foundsize);*/

  1592. #endif

  1593.             size=foundsize;

  1594.         }

  1595.     }

  1596. #endif //MOV_MINOLTA_FIX

  1597. 

  1598. #ifdef MOV_SPLIT_CHUNKS

  1599.     /* split chunks into samples */

  1600.     if (sc->sample_size == 0) {

  1601.         int idx = sc->sample_to_chunk_index;

  1602.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1603. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1604.            idx++;

  1605.         sc->sample_to_chunk_index = idx;

  1606.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1607. 	    mov->partial = sc;

  1608.             /* we'll have to get those samples before next chunk */

  1609.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1610.             size = sc->sample_sizes[sc->current_sample];

  1611.         }

  1612. 

  1613.         sc->current_sample++;

  1614.     }

  1615. #endif

  1616. 

  1617. readchunk:

  1618. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1619.     if(size == 0x0FFFFFFF)

  1620.         size = mov->mdat_size + mov->mdat_offset - offset;

  1621.     if(size < 0)

  1622.         return -1;

  1623.     if(size == 0)

  1624.         return -1;

  1625.     url_fseek(&s->pb, offset, SEEK_SET);

  1626. 

  1627.     //printf("READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1628.     if (sc->header_len > 0) {

  1629.         av_new_packet(pkt, size + sc->header_len);

  1630.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1631.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1632.         /* free header */

  1633.         av_freep(&sc->header_data);

  1634.         sc->header_len = 0;

  1635.     } else {

  1636.         av_new_packet(pkt, size);

  1637.         get_buffer(&s->pb, pkt->data, pkt->size);

  1638.     }

  1639.     pkt->stream_index = sc->ffindex;

  1640. 

  1641. #ifdef DEBUG

  1642. /*

  1643.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1644.     for(i=0; i<8; i++)

  1645.         printf("%02x ", pkt->data[i]);

  1646.     for(i=0; i<8; i++)

  1647.         printf("%c ", (pkt->data[i]) & 0x7F);

  1648.     puts("");

  1649. */

  1650. #endif

  1651. 

  1652.     mov->next_chunk_offset = offset + size;

  1653. 

  1654.     return 0;

  1655. }

  1656. 

  1657. static int mov_read_close(AVFormatContext *s)

  1658. {

  1659.     int i;

  1660.     MOVContext *mov = (MOVContext *) s->priv_data;

  1661.     for(i=0; i<mov->total_streams; i++)

  1662.         mov_free_stream_context(mov->streams[i]);

  1663.     for(i=0; i<s->nb_streams; i++)

  1664. 	av_freep(&s->streams[i]);

  1665.     /* free color tabs */

  1666.     for(i=0; i<mov->ctab_size; i++)

  1667. 	av_freep(&mov->ctab[i]);

  1668.     av_freep(&mov->ctab);

  1669.     return 0;

  1670. }

  1671. 

  1672. static AVInputFormat mov_iformat = {

  1673.     "mov",

  1674.     "QuickTime/MPEG4 format",

  1675.     sizeof(MOVContext),

  1676.     mov_probe,

  1677.     mov_read_header,

  1678.     mov_read_packet,

  1679.     mov_read_close,

  1680. };

  1681. 

  1682. int mov_init(void)

  1683. {

  1684.     av_register_input_format(&mov_iformat);

  1685.     return 0;

  1686. }