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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. #include "qtpalette.h"

  59. 

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

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

  62. #define MOV_SPLIT_CHUNKS

  63. 

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

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

  66. #define MOV_MINOLTA_FIX

  67. 

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

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

  70. /* getting rid of these */

  71. #define CODEC_TYPE_MOV_OTHER	(enum CodecType) 2

  72. 

  73. static const CodecTag mov_video_tags[] = {

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

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

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

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

  78. /* Graphics */

  79. /* Animation */

  80. /* Apple video */

  81. /* Kodak Photo CD */

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

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

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

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

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

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

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

  89. /* Sorenson video */

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

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

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

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

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

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

  96.     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },

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

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

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

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

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

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

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

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

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

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

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

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

  109.     { CODEC_ID_NONE, 0 },

  110. };

  111. 

  112. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  123. 

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

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

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

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

  128. /* MP4 tags */

  129.     { CODEC_ID_MPEG4AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */

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

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

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

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

  134.     { CODEC_ID_NONE, 0 },

  135. };

  136. 

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

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

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

  140.  */

  141. 

  142. typedef struct MOV_sample_to_chunk_tbl {

  143.     long first;

  144.     long count;

  145.     long id;

  146. } MOV_sample_to_chunk_tbl;

  147. 

  148. typedef struct {

  149.     uint32_t type;

  150.     int64_t offset;

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

  152. } MOV_atom_t;

  153. 

  154. typedef struct {

  155.     int seed;

  156.     int flags;

  157.     int size;

  158.     void* clrs;

  159. } MOV_ctab_t;

  160. 

  161. typedef struct {

  162.     uint8_t  version;

  163.     uint32_t flags; // 24bit

  164. 

  165.     /* 0x03 ESDescrTag */

  166.     uint16_t es_id;

  167. #define MP4ODescrTag			0x01

  168. #define MP4IODescrTag			0x02

  169. #define MP4ESDescrTag			0x03

  170. #define MP4DecConfigDescrTag		0x04

  171. #define MP4DecSpecificDescrTag		0x05

  172. #define MP4SLConfigDescrTag		0x06

  173. #define MP4ContentIdDescrTag		0x07

  174. #define MP4SupplContentIdDescrTag	0x08

  175. #define MP4IPIPtrDescrTag		0x09

  176. #define MP4IPMPPtrDescrTag		0x0A

  177. #define MP4IPMPDescrTag			0x0B

  178. #define MP4RegistrationDescrTag		0x0D

  179. #define MP4ESIDIncDescrTag		0x0E

  180. #define MP4ESIDRefDescrTag		0x0F

  181. #define MP4FileIODescrTag		0x10

  182. #define MP4FileODescrTag		0x11

  183. #define MP4ExtProfileLevelDescrTag	0x13

  184. #define MP4ExtDescrTagsStart		0x80

  185. #define MP4ExtDescrTagsEnd		0xFE

  186.     uint8_t  stream_priority;

  187. 

  188.     /* 0x04 DecConfigDescrTag */

  189.     uint8_t  object_type_id;

  190.     uint8_t  stream_type;

  191.     /* XXX: really streamType is

  192.      * only 6bit, followed by:

  193.      * 1bit  upStream

  194.      * 1bit  reserved

  195.      */

  196.     uint32_t buffer_size_db; // 24

  197.     uint32_t max_bitrate;

  198.     uint32_t avg_bitrate;

  199. 

  200.     /* 0x05 DecSpecificDescrTag */

  201.     uint8_t  decoder_cfg_len;

  202.     uint8_t *decoder_cfg;

  203. 

  204.     /* 0x06 SLConfigDescrTag */

  205.     uint8_t  sl_config_len;

  206.     uint8_t *sl_config;

  207. } MOV_esds_t;

  208. 

  209. struct MOVParseTableEntry;

  210. 

  211. typedef struct MOVStreamContext {

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

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

  214.     long next_chunk;

  215.     long chunk_count;

  216.     int64_t *chunk_offsets;

  217.     long sample_to_chunk_sz;

  218.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  219.     long sample_to_chunk_index;

  220.     long sample_size;

  221.     long sample_count;

  222.     long *sample_sizes;

  223.     long keyframe_count;

  224.     long *keyframes;

  225.     int time_scale;

  226.     long current_sample;

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

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

  229.     int header_len;

  230.     uint8_t *header_data;

  231.     MOV_esds_t esds;

  232. } MOVStreamContext;

  233. 

  234. typedef struct MOVContext {

  235.     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) */

  236.     AVFormatContext *fc;

  237.     int time_scale;

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

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

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

  241.     int64_t mdat_size;

  242.     int64_t mdat_offset;

  243.     int total_streams;

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

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

  246.      */

  247.     MOVStreamContext *streams[MAX_STREAMS];

  248. 

  249.     int64_t next_chunk_offset;

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

  251.     int ctab_size;

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

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

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

  255. 

  256.     AVPaletteControl palette_control;

  257. } MOVContext;

  258. 

  259. 

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

  261. 

  262. /* those functions parse an atom */

  263. /* return code:

  264.  1: found what I wanted, exit

  265.  0: continue to parse next atom

  266.  -1: error occured, exit

  267.  */

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

  269. 

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

  271. typedef struct MOVParseTableEntry {

  272.     uint32_t type;

  273.     mov_parse_function func;

  274. } MOVParseTableEntry;

  275. 

  276. #ifdef DEBUG

  277. /*

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

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

  280.  */

  281. static int debug_indent = 0;

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

  283. {

  284.     unsigned int tag, i;

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

  286.     i=debug_indent;

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

  288.     while(i--)

  289.         printf("|");

  290.     printf("parse:");

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

  292.            str, tag & 0xff,

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

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

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

  296.            (unsigned int)atom.offset,

  297. 	   (unsigned int)atom.size);

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

  299. }

  300. #else

  301. #define print_atom(a,b)

  302. #endif

  303. 

  304. 

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

  306. {

  307.     print_atom("leaf", atom);

  308. 

  309.     if (atom.size>1)

  310.         url_fskip(pb, atom.size);

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

  312.     return 0;

  313. }

  314. 

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

  316. {

  317.     int64_t total_size = 0;

  318.     MOV_atom_t a;

  319.     int i;

  320.     int err = 0;

  321. 

  322. #ifdef DEBUG

  323.     print_atom("default", atom);

  324.     debug_indent++;

  325. #endif

  326. 

  327.     a.offset = atom.offset;

  328. 

  329.     if (atom.size < 0)

  330. 	atom.size = 0x7fffffffffffffffLL;

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

  332. 	a.size = atom.size;

  333. 	a.type=0L;

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

  335. 	    a.size = get_be32(pb);

  336.             a.type = get_le32(pb);

  337.         }

  338. 	total_size += 8;

  339.         a.offset += 8;

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

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

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

  343.             a.offset += 8;

  344.             total_size += 8;

  345.         }

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

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

  348. 	    if (a.size <= 8)

  349.                 break;

  350. 	}

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

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

  353. 	    /* empty */;

  354. 

  355. 	a.size -= 8;

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

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

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

  359. #ifdef DEBUG

  360.             print_atom("unknown", a);

  361. #endif

  362.             url_fskip(pb, a.size);

  363. 	} else {

  364. #ifdef DEBUG

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

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

  367. #endif

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

  369. 	}

  370. 

  371. 	a.offset += a.size;

  372.         total_size += a.size;

  373.     }

  374. 

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

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

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

  378.     }

  379. 

  380. #ifdef DEBUG

  381.     debug_indent--;

  382. #endif

  383.     return err;

  384. }

  385. 

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

  387. {

  388.     unsigned int len;

  389.     MOV_ctab_t *t;

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

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

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

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

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

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

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

  397.     if (len > 0) {

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

  399. 	if (t->clrs)

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

  401.     }

  402. 

  403.     return 0;

  404. }

  405. 

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

  407. {

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

  409.     int len = 0;

  410.     uint32_t type;

  411.     uint32_t ctype;

  412. 

  413.     print_atom("hdlr", atom);

  414. 

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

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

  417. 

  418.     /* component type */

  419.     ctype = get_le32(pb);

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

  421. 

  422. #ifdef DEBUG

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

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

  425. #endif

  426. #ifdef DEBUG

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

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

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

  430.             puts("hdlr: vide");

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

  432.             puts("hdlr: soun");

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

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

  435.             puts("hdlr: vide");

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

  437.             puts("hdlr: soun");

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

  439.             puts("hdlr: odsm");

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

  441.             puts("hdlr: sdsm");

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

  443. #endif

  444. 

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

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

  447.         c->mp4 = 0;

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

  449.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  451.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  454.         c->mp4 = 1;

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

  456.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  458.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  459.     }

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

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

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

  463. 

  464.     if(atom.size <= 24)

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

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

  467.     /* component name */

  468. 

  469.     if(c->mp4) {

  470.         /* .mp4: C string */

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

  472.     } else {

  473.         /* .mov: PASCAL string */

  474. #ifdef DEBUG

  475.         char* buf;

  476. #endif

  477.         len = get_byte(pb);

  478. #ifdef DEBUG

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

  480. 	if (buf) {

  481. 	    get_buffer(pb, buf, len);

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

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

  484. 	    av_free(buf);

  485. 	} else

  486. #endif

  487. 	    url_fskip(pb, len);

  488.     }

  489. 

  490.     return 0;

  491. }

  492. 

  493. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  494. {

  495.     int len = 0;

  496.     int count = 4;

  497.     while (count--) {

  498.         int c = get_byte(pb);

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

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

  501. 	    break;

  502.     }

  503.     return len;

  504. }

  505. 

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

  507. {

  508.     int len;

  509.     *tag = get_byte(pb);

  510.     len = mov_mp4_read_descr_len(pb);

  511. #ifdef DEBUG

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

  513. #endif

  514.     return len;

  515. }

  516. 

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

  518. {

  519.     unsigned int val;

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

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

  522.     val |= get_byte(s);

  523.     return val;

  524. }

  525. 

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

  527. {

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

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

  530.     int64_t start_pos = url_ftell(pb);

  531.     int tag, len;

  532. 

  533.     print_atom("esds", atom);

  534. 

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

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

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

  538.     if (tag == MP4ESDescrTag) {

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

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

  541.     } else

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

  543. 

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

  545.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  551. 

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

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

  554. 	if (tag == MP4DecSpecificDescrTag) {

  555. #ifdef DEBUG

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

  557. #endif

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

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

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

  561. 		st->codec.extradata_size = len;

  562. 	    }

  563. 	}

  564.     }

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

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

  567.     return 0;

  568. }

  569. 

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

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

  572. {

  573.     print_atom("mdat", atom);

  574. 

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

  576.         return 0;

  577.     c->found_mdat=1;

  578.     c->mdat_offset = atom.offset;

  579.     c->mdat_size = atom.size;

  580.     if(c->found_moov)

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

  582.     url_fskip(pb, atom.size);

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

  584. }

  585. 

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

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

  588. {

  589.     int err;

  590. 

  591.     print_atom("moov", atom);

  592. 

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

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

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

  596.     c->found_moov=1;

  597.     if(c->found_mdat)

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

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

  600. }

  601. 

  602. 

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

  604. {

  605.     print_atom("mdhd", atom);

  606. 

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

  608. 

  609.     get_byte(pb); get_byte(pb);

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

  611. 

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

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

  614. 

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

  616. 

  617. #ifdef DEBUG

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

  619. #endif

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

  621. 

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

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

  624. 

  625.     return 0;

  626. }

  627. 

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

  629. {

  630.     print_atom("mvhd", atom);

  631. 

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

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

  634. 

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

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

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

  638. #ifdef DEBUG

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

  640. #endif

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

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

  643. 

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

  645. 

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

  647. 

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

  649. 

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

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

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

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

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

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

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

  657. 

  658.     return 0;

  659. }

  660. 

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

  662. {

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

  664. 

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

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

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

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

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

  670. 

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

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

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

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

  675.     } else

  676. 	url_fskip(pb, atom.size);

  677. 

  678.     return 0;

  679. }

  680. 

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

  682. {

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

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

  685.     int entries, i;

  686. 

  687.     print_atom("stco", atom);

  688. 

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

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

  691. 

  692.     entries = get_be32(pb);

  693.     sc->chunk_count = entries;

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

  695.     if (!sc->chunk_offsets)

  696.         return -1;

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

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

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

  700.         }

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

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

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

  704.         }

  705.     } else

  706.         return -1;

  707. #ifdef DEBUG

  708. /*

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

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

  711.     }

  712. */

  713. #endif

  714.     return 0;

  715. }

  716. 

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

  718. {

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

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

  721.     int entries, frames_per_sample;

  722.     uint32_t format;

  723. 

  724.     /* for palette traversal */

  725.     int color_depth;

  726.     int color_start;

  727.     int color_count;

  728.     int color_end;

  729.     int color_index;

  730.     int color_dec;

  731.     int color_greyscale;

  732.     unsigned char *color_table;

  733.     int j;

  734.     unsigned char r, g, b;

  735. 

  736.     print_atom("stsd", atom);

  737. 

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

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

  740. 

  741.     entries = get_be32(pb);

  742. 

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

  744.         enum CodecID id;

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

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

  747. 

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

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

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

  751. 

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

  753.         id = codec_get_id(mov_video_tags, format);

  754.         if (id >= 0) {

  755.             AVCodec *codec;

  756. 	    codec = avcodec_find_decoder(id);

  757.             if (codec)

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

  759.         }

  760. #ifdef DEBUG

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

  762.                size,

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

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

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

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

  767.                st->codec.codec_type);

  768. #endif

  769. 	st->codec.codec_tag = format;

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

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

  772.             st->codec.codec_id = id;

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

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

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

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

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

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

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

  780. #if 1

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

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

  783.                    we ignore this info */

  784.                 st->codec.width = 0;

  785.                 st->codec.height = 0;

  786.             }

  787. #endif

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

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

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

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

  792. #ifdef DEBUG

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

  794. #endif

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

  796. 

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

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

  799. 

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

  801.             st->codec.frame_rate      = 25;

  802.             st->codec.frame_rate_base = 1;

  803. */

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

  805. #if 0

  806. 	    while (size >= 8) {

  807. 		MOV_atom_t a;

  808.                 int64_t start_pos;

  809. 

  810. 		a.size = get_be32(pb);

  811. 		a.type = get_le32(pb);

  812. 		size -= 8;

  813. #ifdef DEBUG

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

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

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

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

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

  819. 		       a.size, size);

  820. #endif

  821.                 start_pos = url_ftell(pb);

  822. 

  823. 		switch(a.type) {

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

  825.                     {

  826.                         int tag, len;

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

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

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

  830.                         if (tag == 0x03) {

  831.                             /* MP4ESDescrTag */

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

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

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

  835.                             if (tag != 0x04)

  836.                                 goto fail;

  837.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  843.                             if (tag != 0x05)

  844.                                 goto fail;

  845.                             /* MP4DecSpecificDescrTag */

  846. #ifdef DEBUG

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

  848. #endif

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

  850.                             if (sc->header_data) {

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

  852. 				sc->header_len = len;

  853.                             }

  854.                         }

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

  856.                     }

  857.                     break;

  858.                 default:

  859.                     break;

  860.                 }

  861. 	    fail:

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

  863. 		if (atom.size > 8) {

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

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

  866. 		    size -= atom.size - 8;

  867. 		}

  868. 	    }

  869.             if (size > 0) {

  870.                 /* unknown extension */

  871.                 url_fskip(pb, size);

  872.             }

  873. #else

  874. 

  875.             /* figure out the palette situation */

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

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

  878. 

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

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

  881.                 (color_depth == 8)) {

  882. 

  883.                 if (color_greyscale) {

  884. 

  885.                     /* compute the greyscale palette */

  886.                     color_count = 1 << color_depth;

  887.                     color_index = 255;

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

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

  890.                         r = g = b = color_index;

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

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

  893.                         color_index -= color_dec;

  894.                         if (color_index < 0)

  895.                             color_index = 0;

  896.                     }

  897. 

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

  899. 

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

  901.                     color_count = 1 << color_depth;

  902.                     if (color_depth == 2)

  903.                         color_table = qt_default_palette_4;

  904.                     else if (color_depth == 4)

  905.                         color_table = qt_default_palette_16;

  906.                     else

  907.                         color_table = qt_default_palette_256;

  908. 

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

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

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

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

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

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

  915.                     }

  916. 

  917.                 } else {

  918. 

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

  920.                     color_start = get_be32(pb);

  921.                     color_count = get_be16(pb);

  922.                     color_end = get_be16(pb);

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

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

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

  926.                          * up front */

  927.                         get_byte(pb);

  928.                         get_byte(pb);

  929.                         r = get_byte(pb);

  930.                         get_byte(pb);

  931.                         g = get_byte(pb);

  932.                         get_byte(pb);

  933.                         b = get_byte(pb);

  934.                         get_byte(pb);

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

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

  937.                     }

  938.                 }

  939. 

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

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

  942.             } else

  943.                 st->codec.palctrl = NULL;

  944. 

  945.             a.size = size;

  946. 	    mov_read_default(c, pb, a);

  947. #endif

  948. 	} else {

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

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

  951. 	    {

  952. #ifdef DEBUG

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

  954. #endif

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

  956.                get_be16(pb);//Reserved_2

  957.                get_be16(pb);//Reserved_2

  958.                get_be32(pb);//Reserved_4

  959.                get_be16(pb);//TimeScale

  960.                get_be16(pb);//Reserved_2

  961. 

  962.                 //AMRSpecificBox.(10 bytes)

  963.                

  964.                get_be32(pb); //size

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

  966.                get_be32(pb); //vendor

  967.                get_byte(pb); //decoder version

  968.                get_be16(pb); //mode_set

  969.                get_byte(pb); //mode_change_period

  970.                get_byte(pb); //frames_per_sample

  971. 

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

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

  974.                {

  975.                    st->codec.sample_rate=8000;

  976.                    st->codec.channels=1;

  977.                }

  978.                else //AMR-WB

  979.                {

  980.                    st->codec.sample_rate=16000;

  981.                    st->codec.channels=1;

  982.                }

  983.                st->codec.bits_per_sample=16;

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

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

  986. 	    }

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

  988.             {

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

  990.                 //Do some mp4 auto detect.

  991.                 c->mp4=1;

  992.                 size-=(16);

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

  994.             }

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

  996. 	    {//16 bytes read, reading atleast 20 more

  997. #ifdef DEBUG

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

  999. #endif

  1000.                 uint16_t version = get_be16(pb); /* version */

  1001.                 get_be16(pb); /* revision level */

  1002.                 get_be32(pb); /* vendor */

  1003. 

  1004.                 st->codec.channels = get_be16(pb);		/* channel count */

  1005. 	        st->codec.bits_per_sample = get_be16(pb);	/* sample size */

  1006. 

  1007.                 /* handle specific s8 codec */

  1008.                 get_be16(pb); /* compression id = 0*/

  1009.                 get_be16(pb); /* packet size = 0 */

  1010. 

  1011.                 st->codec.sample_rate = ((get_be32(pb) >> 16));

  1012. 	        //printf("CODECID %d  %d  %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);

  1013. 

  1014. 	        switch (st->codec.codec_id) {

  1015. 	        case CODEC_ID_PCM_S16BE:

  1016. 		    if (st->codec.bits_per_sample == 8)

  1017. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  1018.                     /* fall */

  1019. 	        case CODEC_ID_PCM_U8:

  1020. 		    st->codec.bit_rate = st->codec.sample_rate * 8;

  1021. 		    break;

  1022. 	        default:

  1023.                     ;

  1024. 	        }

  1025. 

  1026.                 //Read QT version 1 fields. In version 0 theese dont exist

  1027. #ifdef DEBUG

  1028.                 printf("version =%d mp4=%d\n",version,c->mp4);

  1029.                 printf("size-(16+20+16)=%d\n",size-(16+20+16));

  1030. #endif

  1031.                 if((version==1) && size>=(16+20+16))

  1032.                 {

  1033.                     get_be32(pb); /* samples per packet */

  1034.                     get_be32(pb); /* bytes per packet */

  1035.                     get_be32(pb); /* bytes per frame */

  1036.                     get_be32(pb); /* bytes per sample */

  1037.                     if(size>(16+20+16))

  1038.                     {

  1039.                         //Optional, additional atom-based fields

  1040. #ifdef DEBUG

  1041.                         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 ),

  1042.                             (format >> 0) & 0xff,

  1043.                             (format >> 8) & 0xff,

  1044.                             (format >> 16) & 0xff,

  1045.                             (format >> 24) & 0xff);

  1046. #endif

  1047.                         MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };

  1048.                         mov_read_default(c, pb, a);

  1049.                     }

  1050.                 }

  1051.                 else

  1052.                 {

  1053.                     //We should be down to 0 bytes here, but lets make sure.

  1054.                     size-=(16+20);

  1055. #ifdef DEBUG

  1056.                     if(size>0)

  1057.                         printf("skipping 0x%X bytes\n",size-(16+20));

  1058. #endif

  1059.                     url_fskip(pb, size);

  1060.                 }

  1061.             }

  1062.             else

  1063.             {

  1064.                 size-=16;

  1065.                 //Unknown size, but lets do our best and skip the rest.

  1066. #ifdef DEBUG

  1067.                 printf("Strange size, skipping 0x%X bytes\n",size);

  1068. #endif

  1069.                 url_fskip(pb, size);

  1070.             }

  1071.         }

  1072.     }

  1073. 

  1074.     return 0;

  1075. }

  1076. 

  1077. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1078. {

  1079.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1080.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1081.     int entries, i;

  1082. 

  1083.     print_atom("stsc", atom);

  1084. 

  1085.     get_byte(pb); /* version */

  1086.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1087. 

  1088.     entries = get_be32(pb);

  1089. #ifdef DEBUG

  1090. printf("track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1091. #endif

  1092.     sc->sample_to_chunk_sz = entries;

  1093.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1094.     if (!sc->sample_to_chunk)

  1095.         return -1;

  1096.     for(i=0; i<entries; i++) {

  1097.         sc->sample_to_chunk[i].first = get_be32(pb);

  1098.         sc->sample_to_chunk[i].count = get_be32(pb);

  1099.         sc->sample_to_chunk[i].id = get_be32(pb);

  1100. #ifdef DEBUG

  1101. /*        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); */

  1102. #endif

  1103.     }

  1104.     return 0;

  1105. }

  1106. 

  1107. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1108. {

  1109.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1110.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1111.     int entries, i;

  1112. 

  1113.     print_atom("stss", atom);

  1114. 

  1115.     get_byte(pb); /* version */

  1116.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1117. 

  1118.     entries = get_be32(pb);

  1119.     sc->keyframe_count = entries;

  1120. #ifdef DEBUG

  1121.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);

  1122. #endif

  1123.     sc->keyframes = (long*) av_malloc(entries * sizeof(long));

  1124.     if (!sc->keyframes)

  1125.         return -1;

  1126.     for(i=0; i<entries; i++) {

  1127.         sc->keyframes[i] = get_be32(pb);

  1128. #ifdef DEBUG

  1129. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */

  1130. #endif

  1131.     }

  1132.     return 0;

  1133. }

  1134. 

  1135. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1136. {

  1137.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1138.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1139.     int entries, i;

  1140. 

  1141.     print_atom("stsz", atom);

  1142. 

  1143.     get_byte(pb); /* version */

  1144.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1145. 

  1146.     sc->sample_size = get_be32(pb);

  1147.     entries = get_be32(pb);

  1148.     sc->sample_count = entries;

  1149. #ifdef DEBUG

  1150.     printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1151. #endif

  1152.     if(sc->sample_size)

  1153.         return 0; /* there isn't any table following */

  1154.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1155.     if (!sc->sample_sizes)

  1156.         return -1;

  1157.     for(i=0; i<entries; i++) {

  1158.         sc->sample_sizes[i] = get_be32(pb);

  1159. #ifdef DEBUG

  1160. /*        printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  1161. #endif

  1162.     }

  1163.     return 0;

  1164. }

  1165. 

  1166. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1167. {

  1168.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1169.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1170.     int entries, i;

  1171.     int duration=0;

  1172.     int total_sample_count=0;

  1173. 

  1174.     print_atom("stts", atom);

  1175. 

  1176.     get_byte(pb); /* version */

  1177.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1178.     entries = get_be32(pb);

  1179. 

  1180. 

  1181. #ifdef DEBUG

  1182. printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1183. #endif

  1184.     for(i=0; i<entries; i++) {

  1185.         int sample_duration;

  1186.         int sample_count;

  1187. 

  1188.         sample_count=get_be32(pb);

  1189.         sample_duration = get_be32(pb);

  1190. #ifdef DEBUG

  1191.         printf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1192. #endif

  1193.         duration+=sample_duration*sample_count;

  1194.         total_sample_count+=sample_count;

  1195. 

  1196. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1197. 

  1198.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1199.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1200.             st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1201. #ifdef DEBUG

  1202.             printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1203. #endif

  1204.         }

  1205. #endif

  1206.     }

  1207. 

  1208. #define MAX(a,b) a>b?a:b

  1209. #define MIN(a,b) a>b?b:a

  1210.     /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/

  1211.     if(duration>0)

  1212.     {

  1213.         //Find greatest common divisor to avoid overflow using the Euclidean Algorithm...

  1214.         uint32_t max=MAX(duration,total_sample_count);

  1215.         uint32_t min=MIN(duration,total_sample_count);

  1216.         uint32_t spare=max%min;

  1217. 

  1218.         while(spare!=0)

  1219.         {

  1220.             max=min;

  1221.             min=spare;

  1222.             spare=max%min;

  1223.         }

  1224.         

  1225.         duration/=min;

  1226.         total_sample_count/=min;

  1227. 

  1228.         //Only support constant frame rate. But lets calculate the average. Needed by .mp4-files created with nec e606 3g phone.

  1229.         //To get better precision, we use the duration as frame_rate_base

  1230. 

  1231.         st->codec.frame_rate_base=duration;

  1232.         st->codec.frame_rate = c->streams[c->total_streams]->time_scale * total_sample_count;

  1233. 

  1234. #ifdef DEBUG

  1235.         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);

  1236. #endif

  1237.     }

  1238.     else

  1239.     {

  1240.         st->codec.frame_rate_base = 1;

  1241.         st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1242.     }

  1243. #undef MAX

  1244. #undef MIN

  1245.     return 0;

  1246. }

  1247. 

  1248. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1249. {

  1250.     AVStream *st;

  1251.     MOVStreamContext *sc;

  1252. 

  1253.     print_atom("trak", atom);

  1254. 

  1255.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1256.     if (!st) return -2;

  1257.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1258.     if (!sc) {

  1259. 	av_free(st);

  1260.         return -1;

  1261.     }

  1262. 

  1263.     sc->sample_to_chunk_index = -1;

  1264.     st->priv_data = sc;

  1265.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1266.     st->start_time = 0; /* XXX: check */

  1267.     st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;

  1268.     c->streams[c->fc->nb_streams-1] = sc;

  1269. 

  1270.     return mov_read_default(c, pb, atom);

  1271. }

  1272. 

  1273. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1274. {

  1275.     AVStream *st;

  1276. 

  1277.     print_atom("tkhd", atom);

  1278. 

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

  1280. 

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

  1282. 

  1283.     get_byte(pb); get_byte(pb);

  1284.     get_byte(pb); /* flags */

  1285.     /*

  1286.     MOV_TRACK_ENABLED 0x0001

  1287.     MOV_TRACK_IN_MOVIE 0x0002

  1288.     MOV_TRACK_IN_PREVIEW 0x0004

  1289.     MOV_TRACK_IN_POSTER 0x0008

  1290.     */

  1291. 

  1292.     get_be32(pb); /* creation time */

  1293.     get_be32(pb); /* modification time */

  1294.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1295.     get_be32(pb); /* reserved */

  1296.     st->start_time = 0; /* check */

  1297.     st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */

  1298.     get_be32(pb); /* reserved */

  1299.     get_be32(pb); /* reserved */

  1300. 

  1301.     get_be16(pb); /* layer */

  1302.     get_be16(pb); /* alternate group */

  1303.     get_be16(pb); /* volume */

  1304.     get_be16(pb); /* reserved */

  1305. 

  1306.     url_fskip(pb, 36); /* display matrix */

  1307. 

  1308.     /* those are fixed-point */

  1309.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1310.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1311. 

  1312.     return 0;

  1313. }

  1314. 

  1315. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1316. /* like the files created with Adobe Premiere 5.0, for samples see */

  1317. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1318. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1319. {

  1320.     int err;

  1321. 

  1322. #ifdef DEBUG

  1323.     print_atom("wide", atom);

  1324.     debug_indent++;

  1325. #endif

  1326.     if (atom.size < 8)

  1327.         return 0; /* continue */

  1328.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1329.         url_fskip(pb, atom.size - 4);

  1330.         return 0;

  1331.     }

  1332.     atom.type = get_le32(pb);

  1333.     atom.offset += 8;

  1334.     atom.size -= 8;

  1335.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1336.         url_fskip(pb, atom.size);

  1337.         return 0;

  1338.     }

  1339.     err = mov_read_mdat(c, pb, atom);

  1340. #ifdef DEBUG

  1341.     debug_indent--;

  1342. #endif

  1343.     return err;

  1344. }

  1345. 

  1346. 

  1347. #ifdef CONFIG_ZLIB

  1348. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1349. {

  1350.     return -1;

  1351. }

  1352. 

  1353. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1354. {

  1355.     ByteIOContext ctx;

  1356.     uint8_t *cmov_data;

  1357.     uint8_t *moov_data; /* uncompressed data */

  1358.     long cmov_len, moov_len;

  1359.     int ret;

  1360. 

  1361.     print_atom("cmov", atom);

  1362. 

  1363.     get_be32(pb); /* dcom atom */

  1364.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1365.         return -1;

  1366.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1367.         dprintf("unknown compression for cmov atom !");

  1368.         return -1;

  1369.     }

  1370.     get_be32(pb); /* cmvd atom */

  1371.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1372.         return -1;

  1373.     moov_len = get_be32(pb); /* uncompressed size */

  1374.     cmov_len = atom.size - 6 * 4;

  1375. 

  1376.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1377.     if (!cmov_data)

  1378.         return -1;

  1379.     moov_data = (uint8_t *) av_malloc(moov_len);

  1380.     if (!moov_data) {

  1381.         av_free(cmov_data);

  1382.         return -1;

  1383.     }

  1384.     get_buffer(pb, cmov_data, cmov_len);

  1385.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1386.         return -1;

  1387.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1388.         return -1;

  1389.     ctx.buf_end = ctx.buffer + moov_len;

  1390.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1391.     atom.offset = 0;

  1392.     atom.size = moov_len;

  1393. #ifdef DEBUG

  1394.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1395. #endif

  1396.     ret = mov_read_default(c, &ctx, atom);

  1397.     av_free(moov_data);

  1398.     av_free(cmov_data);

  1399. 

  1400.     return ret;

  1401. }

  1402. #endif

  1403. 

  1404. static const MOVParseTableEntry mov_default_parse_table[] = {

  1405. /* mp4 atoms */

  1406. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1407. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1408. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1409. { MKTAG( 'c', 't', 't', 's' ), mov_read_leaf }, /* composition time to sample */

  1410. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1411. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1412. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1413. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1414. { MKTAG( 'e', 'l', 's', 't' ), mov_read_leaf },

  1415. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1416. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1417. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1418. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1419. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1420. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1421. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1422. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1423. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1424. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1425. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1426. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1427. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1428. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1429. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1430. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1431. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1432. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1433. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_default },

  1434. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1435. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorrenson extension ??? */

  1436. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1437. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1438. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1439. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1440. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1441. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1442. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1443. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1444. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1445. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1446. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1447. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1448. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1449. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1450. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1451. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },

  1452. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1453. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1454. /* extra mp4 */

  1455. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1456. /* QT atoms */

  1457. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1458. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1459. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1460. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1461. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1462. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1463. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1464. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1465. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1466. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1467. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1468. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1469. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1470. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1471. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1472. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1473. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1474. #ifdef CONFIG_ZLIB

  1475. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1476. #else

  1477. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1478. #endif

  1479. { 0L, mov_read_leaf }

  1480. };

  1481. 

  1482. static void mov_free_stream_context(MOVStreamContext *sc)

  1483. {

  1484.     if(sc) {

  1485.         av_free(sc->chunk_offsets);

  1486.         av_free(sc->sample_to_chunk);

  1487.         av_free(sc->sample_sizes);

  1488.         av_free(sc->keyframes);

  1489.         av_free(sc->header_data);

  1490.         av_free(sc);

  1491.     }

  1492. }

  1493. 

  1494. static inline uint32_t mov_to_tag(uint8_t *buf)

  1495. {

  1496.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1497. }

  1498. 

  1499. static inline uint32_t to_be32(uint8_t *buf)

  1500. {

  1501.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1502. }

  1503. 

  1504. /* XXX: is it sufficient ? */

  1505. static int mov_probe(AVProbeData *p)

  1506. {

  1507.     unsigned int offset;

  1508.     uint32_t tag;

  1509. 

  1510.     /* check file header */

  1511.     if (p->buf_size <= 12)

  1512.         return 0;

  1513.     offset = 0;

  1514.     for(;;) {

  1515.         /* ignore invalid offset */

  1516.         if ((offset + 8) > (unsigned int)p->buf_size)

  1517.             return 0;

  1518.         tag = mov_to_tag(p->buf + offset + 4);

  1519.         switch(tag) {

  1520.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1521.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1522.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1523.         case MKTAG( 'm', 'd', 'a', 't' ):

  1524.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1525.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1526.             return AVPROBE_SCORE_MAX;

  1527.         case MKTAG( 'f', 't', 'y', 'p' ):

  1528.         case MKTAG( 's', 'k', 'i', 'p' ):

  1529.             offset = to_be32(p->buf+offset) + offset;

  1530.             break;

  1531.         default:

  1532.             /* unrecognized tag */

  1533.             return 0;

  1534.         }

  1535.     }

  1536.     return 0;

  1537. }

  1538. 

  1539. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1540. {

  1541.     MOVContext *mov = (MOVContext *) s->priv_data;

  1542.     ByteIOContext *pb = &s->pb;

  1543.     int i, j, nb, err;

  1544.     MOV_atom_t atom = { 0, 0, 0 };

  1545. 

  1546.     mov->fc = s;

  1547.     mov->parse_table = mov_default_parse_table;

  1548. #if 0

  1549.     /* XXX: I think we should auto detect */

  1550.     if(s->iformat->name[1] == 'p')

  1551.         mov->mp4 = 1;

  1552. #endif

  1553.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1554. 	atom.size = url_filesize(url_fileno(pb));

  1555.     else

  1556. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1557. 

  1558. #ifdef DEBUG

  1559.     printf("filesz=%Ld\n", atom.size);

  1560. #endif

  1561. 

  1562.     /* check MOV header */

  1563.     err = mov_read_default(mov, pb, atom);

  1564.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1565. 	av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1566. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1567. 	return -1;

  1568.     }

  1569. #ifdef DEBUG

  1570.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1571. #endif

  1572.     /* some cleanup : make sure we are on the mdat atom */

  1573.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1574.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1575. 

  1576.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1577. 

  1578. #ifdef DEBUG

  1579.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1580. #endif

  1581. 

  1582. #ifdef DEBUG

  1583.     printf("streams= %d\n", s->nb_streams);

  1584. #endif

  1585.     mov->total_streams = nb = s->nb_streams;

  1586. 

  1587. #if 1

  1588.     for(i=0; i<s->nb_streams;) {

  1589.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1590.             av_free(s->streams[i]);

  1591.             for(j=i+1; j<s->nb_streams; j++)

  1592.                 s->streams[j-1] = s->streams[j];

  1593.             s->nb_streams--;

  1594.         } else

  1595.             i++;

  1596.     }

  1597.     for(i=0; i<s->nb_streams;i++) {

  1598.         MOVStreamContext *sc;

  1599.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1600.         sc->ffindex = i;

  1601.         sc->is_ff_stream = 1;

  1602.     }

  1603. #endif

  1604. #ifdef DEBUG

  1605.     printf("real streams= %d\n", s->nb_streams);

  1606. #endif

  1607.     return 0;

  1608. }

  1609. 

  1610. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1611. /* XXX:remove useless commented code sometime */

  1612. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1613. {

  1614.     MOVContext *mov = (MOVContext *) s->priv_data;

  1615.     MOVStreamContext *sc;

  1616.     int64_t offset = 0x0FFFFFFFFFFFFFFFLL;

  1617.     int i, a, b, m;

  1618.     int size;

  1619.     size = 0x0FFFFFFF;

  1620. 

  1621. #ifdef MOV_SPLIT_CHUNKS

  1622.     if (mov->partial) {

  1623. 

  1624.         int idx;

  1625. 

  1626. 	sc = mov->partial;

  1627. 	idx = sc->sample_to_chunk_index;

  1628. 

  1629.         if (idx < 0) return 0;

  1630. 	size = sc->sample_sizes[sc->current_sample];

  1631. 

  1632.         sc->current_sample++;

  1633.         sc->left_in_chunk--;

  1634. 

  1635.         if (sc->left_in_chunk <= 0)

  1636.             mov->partial = 0;

  1637.         offset = mov->next_chunk_offset;

  1638.         /* extract the sample */

  1639. 

  1640.         goto readchunk;

  1641.     }

  1642. #endif

  1643. 

  1644. again:

  1645.     sc = 0;

  1646.     for(i=0; i<mov->total_streams; i++) {

  1647. 	MOVStreamContext *msc = mov->streams[i];

  1648. 	//printf("MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1649.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1650. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1651. 	    sc = msc;

  1652. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1653. 	    //printf("SELETED  %Ld  i:%d\n", offset, i);

  1654.         }

  1655.     }

  1656.     if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)

  1657. 	return -1;

  1658. 

  1659.     sc->next_chunk++;

  1660. 

  1661.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1662.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1663.         mov->next_chunk_offset = offset;

  1664.     }

  1665. 

  1666. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1667.     if(!sc->is_ff_stream) {

  1668.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1669.         mov->next_chunk_offset = offset;

  1670. 	offset = 0x0FFFFFFFFFFFFFFFLL;

  1671.         goto again;

  1672.     }

  1673. 

  1674.     /* now get the chunk size... */

  1675. 

  1676.     for(i=0; i<mov->total_streams; i++) {

  1677. 	MOVStreamContext *msc = mov->streams[i];

  1678. 	if ((msc->next_chunk < msc->chunk_count)

  1679. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1680. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1681.     }

  1682. 

  1683. #ifdef MOV_MINOLTA_FIX

  1684.     //Make sure that size is according to sample_size (Needed by .mov files 

  1685.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1686.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1687.     //but I have no such movies

  1688.     if (sc->sample_size > 0) { 

  1689.         int foundsize=0;

  1690.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1691.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) && (sc->sample_size>0) )

  1692.             {

  1693.                 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1694.             }

  1695. #ifdef DEBUG

  1696.             /*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);*/

  1697. #endif

  1698.         }

  1699.         if( (foundsize>0) && (foundsize<size) )

  1700.         {

  1701. #ifdef DEBUG

  1702.             /*printf("this size should actually be %d\n",foundsize);*/

  1703. #endif

  1704.             size=foundsize;

  1705.         }

  1706.     }

  1707. #endif //MOV_MINOLTA_FIX

  1708. 

  1709. #ifdef MOV_SPLIT_CHUNKS

  1710.     /* split chunks into samples */

  1711.     if (sc->sample_size == 0) {

  1712.         int idx = sc->sample_to_chunk_index;

  1713.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1714. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1715.            idx++;

  1716.         sc->sample_to_chunk_index = idx;

  1717.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1718. 	    mov->partial = sc;

  1719.             /* we'll have to get those samples before next chunk */

  1720.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1721.             size = sc->sample_sizes[sc->current_sample];

  1722.         }

  1723. 

  1724.         sc->current_sample++;

  1725.     }

  1726. #endif

  1727. 

  1728. readchunk:

  1729. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1730.     if(size == 0x0FFFFFFF)

  1731.         size = mov->mdat_size + mov->mdat_offset - offset;

  1732.     if(size < 0)

  1733.         return -1;

  1734.     if(size == 0)

  1735.         return -1;

  1736.     url_fseek(&s->pb, offset, SEEK_SET);

  1737. 

  1738.     //printf("READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1739.     if (sc->header_len > 0) {

  1740.         av_new_packet(pkt, size + sc->header_len);

  1741.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1742.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1743.         /* free header */

  1744.         av_freep(&sc->header_data);

  1745.         sc->header_len = 0;

  1746.     } else {

  1747.         av_new_packet(pkt, size);

  1748.         get_buffer(&s->pb, pkt->data, pkt->size);

  1749.     }

  1750.     pkt->stream_index = sc->ffindex;

  1751.     

  1752.     // If the keyframes table exists, mark any samples that are in the table as key frames.

  1753.     // If no table exists, treat very sample as a key frame.

  1754.     if (sc->keyframes) {        

  1755.         a = 0;

  1756.         b = sc->keyframe_count - 1;

  1757.         

  1758.         while (a < b) {

  1759.             m = (a + b + 1) >> 1;

  1760.             if (sc->keyframes[m] > sc->current_sample) {

  1761.                 b = m - 1;

  1762.             } else {

  1763.                 a = m;

  1764.             }    

  1765.         }

  1766.         

  1767.         if (sc->keyframes[a] == sc->current_sample)

  1768.             pkt->flags |= PKT_FLAG_KEY;

  1769.     }

  1770.     else

  1771.         pkt->flags |= PKT_FLAG_KEY;

  1772. 

  1773. #ifdef DEBUG

  1774. /*

  1775.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1776.     for(i=0; i<8; i++)

  1777.         printf("%02x ", pkt->data[i]);

  1778.     for(i=0; i<8; i++)

  1779.         printf("%c ", (pkt->data[i]) & 0x7F);

  1780.     puts("");

  1781. */

  1782. #endif

  1783. 

  1784.     mov->next_chunk_offset = offset + size;

  1785. 

  1786.     return 0;

  1787. }

  1788. 

  1789. static int mov_read_close(AVFormatContext *s)

  1790. {

  1791.     int i;

  1792.     MOVContext *mov = (MOVContext *) s->priv_data;

  1793.     for(i=0; i<mov->total_streams; i++)

  1794.         mov_free_stream_context(mov->streams[i]);

  1795.     /* free color tabs */

  1796.     for(i=0; i<mov->ctab_size; i++)

  1797. 	av_freep(&mov->ctab[i]);

  1798.     av_freep(&mov->ctab);

  1799.     return 0;

  1800. }

  1801. 

  1802. static AVInputFormat mov_iformat = {

  1803.     "mov,mp4,m4a,3gp",

  1804.     "QuickTime/MPEG4 format",

  1805.     sizeof(MOVContext),

  1806.     mov_probe,

  1807.     mov_read_header,

  1808.     mov_read_packet,

  1809.     mov_read_close,

  1810. };

  1811. 

  1812. int mov_init(void)

  1813. {

  1814.     av_register_input_format(&mov_iformat);

  1815.     return 0;

  1816. }