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FFmpeg/libavformat/mov.c

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  1. /*

  2.  * MOV decoder.

  3.  * Copyright (c) 2001 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

  6.  * modify it under the terms of the GNU Lesser General Public

  7.  * License as published by the Free Software Foundation; either

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

  11.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  13.  * Lesser General Public License for more details.

  14.  *

  15.  * You should have received a copy of the GNU Lesser General Public

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. 

  20. #include <limits.h>

  21.  

  22. #include "avformat.h"

  23. #include "avi.h"

  24. 

  25. #ifdef CONFIG_ZLIB

  26. #include <zlib.h>

  27. #endif

  28. 

  29. /*

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

  31.  *

  32.  * Features and limitations:

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

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

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

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

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

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

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

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

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

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

  43.  *

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

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

  46.  *

  47.  * Reference documents:

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

  49.  * Apple:

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

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

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

  53.  */

  54. 

  55. //#define DEBUG

  56. #ifdef DEBUG

  57. #include <stdio.h>

  58. #include <fcntl.h>

  59. #endif

  60. 

  61. #include "qtpalette.h"

  62. 

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

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

  65. #define MOV_SPLIT_CHUNKS

  66. 

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

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

  69. #define MOV_MINOLTA_FIX

  70. 

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

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

  73. /* getting rid of these */

  74. #define CODEC_TYPE_MOV_OTHER	(enum CodecType) 2

  75. 

  76. static const CodecTag mov_video_tags[] = {

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

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

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

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

  81. /* Graphics */

  82. /* Animation */

  83. /* Apple video */

  84. /* Kodak Photo CD */

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

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

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

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

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

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

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

  92. /* Sorenson video */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  112.     { CODEC_ID_NONE, 0 },

  113. };

  114. 

  115. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  126. 

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

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

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

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

  131. /* MP4 tags */

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

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

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

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

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

  137.     { CODEC_ID_NONE, 0 },

  138. };

  139. 

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

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

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

  143.  */

  144. 

  145. typedef struct MOV_sample_to_chunk_tbl {

  146.     long first;

  147.     long count;

  148.     long id;

  149. } MOV_sample_to_chunk_tbl;

  150. 

  151. typedef struct {

  152.     uint32_t type;

  153.     int64_t offset;

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

  155. } MOV_atom_t;

  156. 

  157. typedef struct {

  158.     int seed;

  159.     int flags;

  160.     int size;

  161.     void* clrs;

  162. } MOV_ctab_t;

  163. 

  164. typedef struct {

  165.     uint8_t  version;

  166.     uint32_t flags; // 24bit

  167. 

  168.     /* 0x03 ESDescrTag */

  169.     uint16_t es_id;

  170. #define MP4ODescrTag			0x01

  171. #define MP4IODescrTag			0x02

  172. #define MP4ESDescrTag			0x03

  173. #define MP4DecConfigDescrTag		0x04

  174. #define MP4DecSpecificDescrTag		0x05

  175. #define MP4SLConfigDescrTag		0x06

  176. #define MP4ContentIdDescrTag		0x07

  177. #define MP4SupplContentIdDescrTag	0x08

  178. #define MP4IPIPtrDescrTag		0x09

  179. #define MP4IPMPPtrDescrTag		0x0A

  180. #define MP4IPMPDescrTag			0x0B

  181. #define MP4RegistrationDescrTag		0x0D

  182. #define MP4ESIDIncDescrTag		0x0E

  183. #define MP4ESIDRefDescrTag		0x0F

  184. #define MP4FileIODescrTag		0x10

  185. #define MP4FileODescrTag		0x11

  186. #define MP4ExtProfileLevelDescrTag	0x13

  187. #define MP4ExtDescrTagsStart		0x80

  188. #define MP4ExtDescrTagsEnd		0xFE

  189.     uint8_t  stream_priority;

  190. 

  191.     /* 0x04 DecConfigDescrTag */

  192.     uint8_t  object_type_id;

  193.     uint8_t  stream_type;

  194.     /* XXX: really streamType is

  195.      * only 6bit, followed by:

  196.      * 1bit  upStream

  197.      * 1bit  reserved

  198.      */

  199.     uint32_t buffer_size_db; // 24

  200.     uint32_t max_bitrate;

  201.     uint32_t avg_bitrate;

  202. 

  203.     /* 0x05 DecSpecificDescrTag */

  204.     uint8_t  decoder_cfg_len;

  205.     uint8_t *decoder_cfg;

  206. 

  207.     /* 0x06 SLConfigDescrTag */

  208.     uint8_t  sl_config_len;

  209.     uint8_t *sl_config;

  210. } MOV_esds_t;

  211. 

  212. struct MOVParseTableEntry;

  213. 

  214. typedef struct MOVStreamContext {

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

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

  217.     long next_chunk;

  218.     long chunk_count;

  219.     int64_t *chunk_offsets;

  220.     long sample_to_chunk_sz;

  221.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  222.     long sample_to_chunk_index;

  223.     long sample_size;

  224.     long sample_count;

  225.     long *sample_sizes;

  226.     long keyframe_count;

  227.     long *keyframes;

  228.     int time_scale;

  229.     long current_sample;

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

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

  232.     int header_len;

  233.     uint8_t *header_data;

  234.     MOV_esds_t esds;

  235. } MOVStreamContext;

  236. 

  237. typedef struct MOVContext {

  238.     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) */

  239.     AVFormatContext *fc;

  240.     int time_scale;

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

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

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

  244.     int64_t mdat_size;

  245.     int64_t mdat_offset;

  246.     int total_streams;

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

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

  249.      */

  250.     MOVStreamContext *streams[MAX_STREAMS];

  251. 

  252.     int64_t next_chunk_offset;

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

  254.     int ctab_size;

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

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

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

  258. 

  259.     AVPaletteControl palette_control;

  260. } MOVContext;

  261. 

  262. 

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

  264. 

  265. /* those functions parse an atom */

  266. /* return code:

  267.  1: found what I wanted, exit

  268.  0: continue to parse next atom

  269.  -1: error occured, exit

  270.  */

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

  272. 

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

  274. typedef struct MOVParseTableEntry {

  275.     uint32_t type;

  276.     mov_parse_function func;

  277. } MOVParseTableEntry;

  278. 

  279. #ifdef DEBUG

  280. /*

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

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

  283.  */

  284. static int debug_indent = 0;

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

  286. {

  287.     unsigned int tag, i;

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

  289.     i=debug_indent;

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

  291.     while(i--)

  292.         printf("|");

  293.     printf("parse:");

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

  295.            str, tag & 0xff,

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

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

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

  299.            (unsigned int)atom.offset,

  300. 	   (unsigned int)atom.size);

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

  302. }

  303. #else

  304. #define print_atom(a,b)

  305. #endif

  306. 

  307. 

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

  309. {

  310.     print_atom("leaf", atom);

  311. 

  312.     if (atom.size>1)

  313.         url_fskip(pb, atom.size);

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

  315.     return 0;

  316. }

  317. 

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

  319. {

  320.     int64_t total_size = 0;

  321.     MOV_atom_t a;

  322.     int i;

  323.     int err = 0;

  324. 

  325. #ifdef DEBUG

  326.     print_atom("default", atom);

  327.     debug_indent++;

  328. #endif

  329. 

  330.     a.offset = atom.offset;

  331. 

  332.     if (atom.size < 0)

  333. 	atom.size = 0x7fffffffffffffffLL;

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

  335. 	a.size = atom.size;

  336. 	a.type=0L;

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

  338. 	    a.size = get_be32(pb);

  339.             a.type = get_le32(pb);

  340.         }

  341. 	total_size += 8;

  342.         a.offset += 8;

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

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

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

  346.             a.offset += 8;

  347.             total_size += 8;

  348.         }

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

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

  351. 	    if (a.size <= 8)

  352.                 break;

  353. 	}

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

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

  356. 	    /* empty */;

  357. 

  358. 	a.size -= 8;

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

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

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

  362. #ifdef DEBUG

  363.             print_atom("unknown", a);

  364. #endif

  365.             url_fskip(pb, a.size);

  366. 	} else {

  367. #ifdef DEBUG

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

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

  370. #endif

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

  372. 	}

  373. 

  374. 	a.offset += a.size;

  375.         total_size += a.size;

  376.     }

  377. 

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

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

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

  381.     }

  382. 

  383. #ifdef DEBUG

  384.     debug_indent--;

  385. #endif

  386.     return err;

  387. }

  388. 

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

  390. {

  391.     unsigned int len;

  392.     MOV_ctab_t *t;

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

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

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

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

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

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

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

  400.     if (len > 0) {

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

  402. 	if (t->clrs)

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

  404.     }

  405. 

  406.     return 0;

  407. }

  408. 

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

  410. {

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

  412.     int len = 0;

  413.     uint32_t type;

  414.     uint32_t ctype;

  415. 

  416.     print_atom("hdlr", atom);

  417. 

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

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

  420. 

  421.     /* component type */

  422.     ctype = get_le32(pb);

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

  424. 

  425. #ifdef DEBUG

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

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

  428. #endif

  429. #ifdef DEBUG

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

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

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

  433.             puts("hdlr: vide");

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

  435.             puts("hdlr: soun");

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

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

  438.             puts("hdlr: vide");

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

  440.             puts("hdlr: soun");

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

  442.             puts("hdlr: odsm");

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

  444.             puts("hdlr: sdsm");

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

  446. #endif

  447. 

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

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

  450.         c->mp4 = 0;

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

  452.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  454.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  457.         c->mp4 = 1;

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

  459.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  461.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  462.     }

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

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

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

  466. 

  467.     if(atom.size <= 24)

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

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

  470.     /* component name */

  471. 

  472.     if(c->mp4) {

  473.         /* .mp4: C string */

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

  475.     } else {

  476.         /* .mov: PASCAL string */

  477. #ifdef DEBUG

  478.         char* buf;

  479. #endif

  480.         len = get_byte(pb);

  481. #ifdef DEBUG

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

  483. 	if (buf) {

  484. 	    get_buffer(pb, buf, len);

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

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

  487. 	    av_free(buf);

  488. 	} else

  489. #endif

  490. 	    url_fskip(pb, len);

  491.     }

  492. 

  493.     return 0;

  494. }

  495. 

  496. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  497. {

  498.     int len = 0;

  499.     int count = 4;

  500.     while (count--) {

  501.         int c = get_byte(pb);

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

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

  504. 	    break;

  505.     }

  506.     return len;

  507. }

  508. 

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

  510. {

  511.     int len;

  512.     *tag = get_byte(pb);

  513.     len = mov_mp4_read_descr_len(pb);

  514. #ifdef DEBUG

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

  516. #endif

  517.     return len;

  518. }

  519. 

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

  521. {

  522.     unsigned int val;

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

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

  525.     val |= get_byte(s);

  526.     return val;

  527. }

  528. 

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

  530. {

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

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

  533.     int64_t start_pos = url_ftell(pb);

  534.     int tag, len;

  535. 

  536.     print_atom("esds", atom);

  537. 

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

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

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

  541.     if (tag == MP4ESDescrTag) {

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

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

  544.     } else

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

  546. 

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

  548.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

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

  554. 

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

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

  557. 	if (tag == MP4DecSpecificDescrTag) {

  558. #ifdef DEBUG

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

  560. #endif

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

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

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

  564. 		st->codec.extradata_size = len;

  565. 	    }

  566. 	}

  567.     }

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

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

  570.     return 0;

  571. }

  572. 

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

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

  575. {

  576.     print_atom("mdat", atom);

  577. 

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

  579.         return 0;

  580.     c->found_mdat=1;

  581.     c->mdat_offset = atom.offset;

  582.     c->mdat_size = atom.size;

  583.     if(c->found_moov)

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

  585.     url_fskip(pb, atom.size);

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

  587. }

  588. 

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

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

  591. {

  592.     int err;

  593. 

  594.     print_atom("moov", atom);

  595. 

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

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

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

  599.     c->found_moov=1;

  600.     if(c->found_mdat)

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

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

  603. }

  604. 

  605. 

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

  607. {

  608.     print_atom("mdhd", atom);

  609. 

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

  611. 

  612.     get_byte(pb); get_byte(pb);

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

  614. 

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

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

  617. 

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

  619. 

  620. #ifdef DEBUG

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

  622. #endif

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

  624. 

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

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

  627. 

  628.     return 0;

  629. }

  630. 

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

  632. {

  633.     print_atom("mvhd", atom);

  634. 

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

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

  637. 

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

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

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

  641. #ifdef DEBUG

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

  643. #endif

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

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

  646. 

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

  648. 

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

  650. 

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

  652. 

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

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

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

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

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

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

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

  660. 

  661.     return 0;

  662. }

  663. 

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

  665. {

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

  667. 

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

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

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

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

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

  673. 

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

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

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

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

  678.     } else

  679. 	url_fskip(pb, atom.size);

  680. 

  681.     return 0;

  682. }

  683. 

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

  685. {

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

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

  688.     int entries, i;

  689. 

  690.     print_atom("stco", atom);

  691. 

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

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

  694. 

  695.     entries = get_be32(pb);

  696.     sc->chunk_count = entries;

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

  698.     if (!sc->chunk_offsets)

  699.         return -1;

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

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

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

  703.         }

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

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

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

  707.         }

  708.     } else

  709.         return -1;

  710. #ifdef DEBUG

  711. /*

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

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

  714.     }

  715. */

  716. #endif

  717.     return 0;

  718. }

  719. 

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

  721. {

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

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

  724.     int entries, frames_per_sample;

  725.     uint32_t format;

  726. 

  727.     /* for palette traversal */

  728.     int color_depth;

  729.     int color_start;

  730.     int color_count;

  731.     int color_end;

  732.     int color_index;

  733.     int color_dec;

  734.     int color_greyscale;

  735.     unsigned char *color_table;

  736.     int j;

  737.     unsigned char r, g, b;

  738. 

  739.     print_atom("stsd", atom);

  740. 

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

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

  743. 

  744.     entries = get_be32(pb);

  745. 

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

  747.         enum CodecID id;

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

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

  750. 

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

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

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

  754. 

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

  756.         id = codec_get_id(mov_video_tags, format);

  757.         if (id >= 0) {

  758.             AVCodec *codec;

  759. 	    codec = avcodec_find_decoder(id);

  760.             if (codec)

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

  762.         }

  763. #ifdef DEBUG

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

  765.                size,

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

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

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

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

  770.                st->codec.codec_type);

  771. #endif

  772. 	st->codec.codec_tag = format;

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

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

  775.             st->codec.codec_id = id;

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

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

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

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

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

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

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

  783. #if 1

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

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

  786.                    we ignore this info */

  787.                 st->codec.width = 0;

  788.                 st->codec.height = 0;

  789.             }

  790. #endif

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

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

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

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

  795. #ifdef DEBUG

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

  797. #endif

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

  799. 

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

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

  802. 

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

  804.             st->codec.frame_rate      = 25;

  805.             st->codec.frame_rate_base = 1;

  806. */

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

  808. #if 0

  809. 	    while (size >= 8) {

  810. 		MOV_atom_t a;

  811.                 int64_t start_pos;

  812. 

  813. 		a.size = get_be32(pb);

  814. 		a.type = get_le32(pb);

  815. 		size -= 8;

  816. #ifdef DEBUG

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

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

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

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

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

  822. 		       a.size, size);

  823. #endif

  824.                 start_pos = url_ftell(pb);

  825. 

  826. 		switch(a.type) {

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

  828.                     {

  829.                         int tag, len;

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

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

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

  833.                         if (tag == 0x03) {

  834.                             /* MP4ESDescrTag */

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

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

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

  838.                             if (tag != 0x04)

  839.                                 goto fail;

  840.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  846.                             if (tag != 0x05)

  847.                                 goto fail;

  848.                             /* MP4DecSpecificDescrTag */

  849. #ifdef DEBUG

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

  851. #endif

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

  853.                             if (sc->header_data) {

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

  855. 				sc->header_len = len;

  856.                             }

  857.                         }

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

  859.                     }

  860.                     break;

  861.                 default:

  862.                     break;

  863.                 }

  864. 	    fail:

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

  866. 		if (atom.size > 8) {

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

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

  869. 		    size -= atom.size - 8;

  870. 		}

  871. 	    }

  872.             if (size > 0) {

  873.                 /* unknown extension */

  874.                 url_fskip(pb, size);

  875.             }

  876. #else

  877. 

  878.             /* figure out the palette situation */

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

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

  881. 

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

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

  884.                 (color_depth == 8)) {

  885. 

  886.                 if (color_greyscale) {

  887. 

  888.                     /* compute the greyscale palette */

  889.                     color_count = 1 << color_depth;

  890.                     color_index = 255;

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

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

  893.                         r = g = b = color_index;

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

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

  896.                         color_index -= color_dec;

  897.                         if (color_index < 0)

  898.                             color_index = 0;

  899.                     }

  900. 

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

  902. 

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

  904.                     color_count = 1 << color_depth;

  905.                     if (color_depth == 2)

  906.                         color_table = ff_qt_default_palette_4;

  907.                     else if (color_depth == 4)

  908.                         color_table = ff_qt_default_palette_16;

  909.                     else

  910.                         color_table = ff_qt_default_palette_256;

  911. 

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

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

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

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

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

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

  918.                     }

  919. 

  920.                 } else {

  921. 

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

  923.                     color_start = get_be32(pb);

  924.                     color_count = get_be16(pb);

  925.                     color_end = get_be16(pb);

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

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

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

  929.                          * up front */

  930.                         get_byte(pb);

  931.                         get_byte(pb);

  932.                         r = get_byte(pb);

  933.                         get_byte(pb);

  934.                         g = get_byte(pb);

  935.                         get_byte(pb);

  936.                         b = get_byte(pb);

  937.                         get_byte(pb);

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

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

  940.                     }

  941.                 }

  942. 

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

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

  945.             } else

  946.                 st->codec.palctrl = NULL;

  947. 

  948.             a.size = size;

  949. 	    mov_read_default(c, pb, a);

  950. #endif

  951. 	} else {

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

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

  954. 	    {

  955. #ifdef DEBUG

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

  957. #endif

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

  959.                get_be16(pb);//Reserved_2

  960.                get_be16(pb);//Reserved_2

  961.                get_be32(pb);//Reserved_4

  962.                get_be16(pb);//TimeScale

  963.                get_be16(pb);//Reserved_2

  964. 

  965.                 //AMRSpecificBox.(10 bytes)

  966.                

  967.                get_be32(pb); //size

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

  969.                get_be32(pb); //vendor

  970.                get_byte(pb); //decoder version

  971.                get_be16(pb); //mode_set

  972.                get_byte(pb); //mode_change_period

  973.                get_byte(pb); //frames_per_sample

  974. 

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

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

  977.                {

  978.                    st->codec.sample_rate=8000;

  979.                    st->codec.channels=1;

  980.                }

  981.                else //AMR-WB

  982.                {

  983.                    st->codec.sample_rate=16000;

  984.                    st->codec.channels=1;

  985.                }

  986.                st->codec.bits_per_sample=16;

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

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

  989. 	    }

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

  991.             {

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

  993.                 //Do some mp4 auto detect.

  994.                 c->mp4=1;

  995.                 size-=(16);

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

  997.             }

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

  999.             {

  1000.                 /* Handle mp4 audio tag */

  1001.                 get_be32(pb); /* version */

  1002.                 get_be32(pb);

  1003.                 st->codec.channels = get_be16(pb); /* channels */

  1004.                 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */

  1005.                 get_be32(pb);

  1006.                 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */

  1007.                 get_be16(pb);

  1008.                 c->mp4=1;

  1009. 		{

  1010.                 MOV_atom_t a = { format, url_ftell(pb), size - (20 + 20 + 8) };

  1011.                 mov_read_default(c, pb, a);

  1012. 		}

  1013.                 /* Get correct sample rate from extradata */

  1014.                 if(st->codec.extradata_size) {

  1015.                    const int samplerate_table[] = {

  1016.                      96000, 88200, 64000, 48000, 44100, 32000, 

  1017.                      24000, 22050, 16000, 12000, 11025, 8000,

  1018.                      7350, 0, 0, 0

  1019.                    };

  1020.                    unsigned char *px = st->codec.extradata;

  1021.                    // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels

  1022.                    int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);

  1023.                    st->codec.sample_rate = samplerate_table[samplerate_index];

  1024.                 }

  1025.             }

  1026. 	    else if(size>=(16+20))

  1027. 	    {//16 bytes read, reading atleast 20 more

  1028. #ifdef DEBUG

  1029.                 printf("audio size=0x%X\n",size);

  1030. #endif

  1031.                 uint16_t version = get_be16(pb); /* version */

  1032.                 get_be16(pb); /* revision level */

  1033.                 get_be32(pb); /* vendor */

  1034. 

  1035.                 st->codec.channels = get_be16(pb);		/* channel count */

  1036. 	        st->codec.bits_per_sample = get_be16(pb);	/* sample size */

  1037. 

  1038.                 /* handle specific s8 codec */

  1039.                 get_be16(pb); /* compression id = 0*/

  1040.                 get_be16(pb); /* packet size = 0 */

  1041. 

  1042.                 st->codec.sample_rate = ((get_be32(pb) >> 16));

  1043. 	        //printf("CODECID %d  %d  %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);

  1044. 

  1045. 	        switch (st->codec.codec_id) {

  1046. 	        case CODEC_ID_PCM_S16BE:

  1047. 		    if (st->codec.bits_per_sample == 8)

  1048. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  1049.                     /* fall */

  1050. 	        case CODEC_ID_PCM_U8:

  1051. 		    st->codec.bit_rate = st->codec.sample_rate * 8;

  1052. 		    break;

  1053. 	        default:

  1054.                     ;

  1055. 	        }

  1056. 

  1057.                 //Read QT version 1 fields. In version 0 theese dont exist

  1058. #ifdef DEBUG

  1059.                 printf("version =%d mp4=%d\n",version,c->mp4);

  1060.                 printf("size-(16+20+16)=%d\n",size-(16+20+16));

  1061. #endif

  1062.                 if((version==1) && size>=(16+20+16))

  1063.                 {

  1064.                     get_be32(pb); /* samples per packet */

  1065.                     get_be32(pb); /* bytes per packet */

  1066.                     get_be32(pb); /* bytes per frame */

  1067.                     get_be32(pb); /* bytes per sample */

  1068.                     if(size>(16+20+16))

  1069.                     {

  1070.                         //Optional, additional atom-based fields

  1071. #ifdef DEBUG

  1072.                         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 ),

  1073.                             (format >> 0) & 0xff,

  1074.                             (format >> 8) & 0xff,

  1075.                             (format >> 16) & 0xff,

  1076.                             (format >> 24) & 0xff);

  1077. #endif

  1078.                         MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };

  1079.                         mov_read_default(c, pb, a);

  1080.                     }

  1081.                 }

  1082.                 else

  1083.                 {

  1084.                     //We should be down to 0 bytes here, but lets make sure.

  1085.                     size-=(16+20);

  1086. #ifdef DEBUG

  1087.                     if(size>0)

  1088.                         printf("skipping 0x%X bytes\n",size-(16+20));

  1089. #endif

  1090.                     url_fskip(pb, size);

  1091.                 }

  1092.             }

  1093.             else

  1094.             {

  1095.                 size-=16;

  1096.                 //Unknown size, but lets do our best and skip the rest.

  1097. #ifdef DEBUG

  1098.                 printf("Strange size, skipping 0x%X bytes\n",size);

  1099. #endif

  1100.                 url_fskip(pb, size);

  1101.             }

  1102.         }

  1103.     }

  1104. 

  1105.     return 0;

  1106. }

  1107. 

  1108. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1109. {

  1110.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1111.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1112.     int entries, i;

  1113. 

  1114.     print_atom("stsc", atom);

  1115. 

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

  1117.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1118. 

  1119.     entries = get_be32(pb);

  1120. #ifdef DEBUG

  1121. printf("track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1122. #endif

  1123.     sc->sample_to_chunk_sz = entries;

  1124.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1125.     if (!sc->sample_to_chunk)

  1126.         return -1;

  1127.     for(i=0; i<entries; i++) {

  1128.         sc->sample_to_chunk[i].first = get_be32(pb);

  1129.         sc->sample_to_chunk[i].count = get_be32(pb);

  1130.         sc->sample_to_chunk[i].id = get_be32(pb);

  1131. #ifdef DEBUG

  1132. /*        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); */

  1133. #endif

  1134.     }

  1135.     return 0;

  1136. }

  1137. 

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

  1139. {

  1140.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1141.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1142.     int entries, i;

  1143. 

  1144.     print_atom("stss", atom);

  1145. 

  1146.     get_byte(pb); /* version */

  1147.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1148. 

  1149.     entries = get_be32(pb);

  1150.     sc->keyframe_count = entries;

  1151. #ifdef DEBUG

  1152.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);

  1153. #endif

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

  1155.     if (!sc->keyframes)

  1156.         return -1;

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

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

  1159. #ifdef DEBUG

  1160. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */

  1161. #endif

  1162.     }

  1163.     return 0;

  1164. }

  1165. 

  1166. static int mov_read_stsz(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. 

  1172.     print_atom("stsz", atom);

  1173. 

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

  1175.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1176. 

  1177.     sc->sample_size = get_be32(pb);

  1178.     entries = get_be32(pb);

  1179.     sc->sample_count = entries;

  1180. #ifdef DEBUG

  1181.     printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1182. #endif

  1183.     if(sc->sample_size)

  1184.         return 0; /* there isn't any table following */

  1185.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1186.     if (!sc->sample_sizes)

  1187.         return -1;

  1188.     for(i=0; i<entries; i++) {

  1189.         sc->sample_sizes[i] = get_be32(pb);

  1190. #ifdef DEBUG

  1191. /*        printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  1192. #endif

  1193.     }

  1194.     return 0;

  1195. }

  1196. 

  1197. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1198. {

  1199.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1200.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1201.     int entries, i;

  1202.     int64_t duration=0;

  1203.     int64_t total_sample_count=0;

  1204. 

  1205.     print_atom("stts", atom);

  1206. 

  1207.     get_byte(pb); /* version */

  1208.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1209.     entries = get_be32(pb);

  1210. 

  1211. 

  1212. #ifdef DEBUG

  1213. printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1214. #endif

  1215.     for(i=0; i<entries; i++) {

  1216.         int sample_duration;

  1217.         int sample_count;

  1218. 

  1219.         sample_count=get_be32(pb);

  1220.         sample_duration = get_be32(pb);

  1221. #ifdef DEBUG

  1222.         printf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1223. #endif

  1224.         duration+=sample_duration*sample_count;

  1225.         total_sample_count+=sample_count;

  1226. 

  1227. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1228. 

  1229.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1230.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1231.             st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1232. #ifdef DEBUG

  1233.             printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1234. #endif

  1235.         }

  1236. #endif

  1237.     }

  1238. 

  1239.     /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/

  1240.     if(duration>0)

  1241.     {

  1242.         av_reduce(

  1243.             &st->codec.frame_rate, 

  1244.             &st->codec.frame_rate_base, 

  1245.             c->streams[c->total_streams]->time_scale * total_sample_count,

  1246.             duration,

  1247.             INT_MAX

  1248.         );

  1249. 

  1250. #ifdef DEBUG

  1251.         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);

  1252. #endif

  1253.     }

  1254.     else

  1255.     {

  1256.         st->codec.frame_rate_base = 1;

  1257.         st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1258.     }

  1259.     return 0;

  1260. }

  1261. 

  1262. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1263. {

  1264.     AVStream *st;

  1265.     MOVStreamContext *sc;

  1266. 

  1267.     print_atom("trak", atom);

  1268. 

  1269.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1270.     if (!st) return -2;

  1271.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1272.     if (!sc) {

  1273. 	av_free(st);

  1274.         return -1;

  1275.     }

  1276. 

  1277.     sc->sample_to_chunk_index = -1;

  1278.     st->priv_data = sc;

  1279.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1280.     st->start_time = 0; /* XXX: check */

  1281.     st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;

  1282.     c->streams[c->fc->nb_streams-1] = sc;

  1283. 

  1284.     return mov_read_default(c, pb, atom);

  1285. }

  1286. 

  1287. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1288. {

  1289.     AVStream *st;

  1290. 

  1291.     print_atom("tkhd", atom);

  1292. 

  1293.     st = c->fc->streams[c->fc->nb_streams-1];

  1294. 

  1295.     get_byte(pb); /* version */

  1296. 

  1297.     get_byte(pb); get_byte(pb);

  1298.     get_byte(pb); /* flags */

  1299.     /*

  1300.     MOV_TRACK_ENABLED 0x0001

  1301.     MOV_TRACK_IN_MOVIE 0x0002

  1302.     MOV_TRACK_IN_PREVIEW 0x0004

  1303.     MOV_TRACK_IN_POSTER 0x0008

  1304.     */

  1305. 

  1306.     get_be32(pb); /* creation time */

  1307.     get_be32(pb); /* modification time */

  1308.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1309.     get_be32(pb); /* reserved */

  1310.     st->start_time = 0; /* check */

  1311.     st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */

  1312.     get_be32(pb); /* reserved */

  1313.     get_be32(pb); /* reserved */

  1314. 

  1315.     get_be16(pb); /* layer */

  1316.     get_be16(pb); /* alternate group */

  1317.     get_be16(pb); /* volume */

  1318.     get_be16(pb); /* reserved */

  1319. 

  1320.     url_fskip(pb, 36); /* display matrix */

  1321. 

  1322.     /* those are fixed-point */

  1323.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1324.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1325. 

  1326.     return 0;

  1327. }

  1328. 

  1329. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1330. /* like the files created with Adobe Premiere 5.0, for samples see */

  1331. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1332. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1333. {

  1334.     int err;

  1335. 

  1336. #ifdef DEBUG

  1337.     print_atom("wide", atom);

  1338.     debug_indent++;

  1339. #endif

  1340.     if (atom.size < 8)

  1341.         return 0; /* continue */

  1342.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1343.         url_fskip(pb, atom.size - 4);

  1344.         return 0;

  1345.     }

  1346.     atom.type = get_le32(pb);

  1347.     atom.offset += 8;

  1348.     atom.size -= 8;

  1349.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1350.         url_fskip(pb, atom.size);

  1351.         return 0;

  1352.     }

  1353.     err = mov_read_mdat(c, pb, atom);

  1354. #ifdef DEBUG

  1355.     debug_indent--;

  1356. #endif

  1357.     return err;

  1358. }

  1359. 

  1360. 

  1361. #ifdef CONFIG_ZLIB

  1362. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1363. {

  1364.     return -1;

  1365. }

  1366. 

  1367. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1368. {

  1369.     ByteIOContext ctx;

  1370.     uint8_t *cmov_data;

  1371.     uint8_t *moov_data; /* uncompressed data */

  1372.     long cmov_len, moov_len;

  1373.     int ret;

  1374. 

  1375.     print_atom("cmov", atom);

  1376. 

  1377.     get_be32(pb); /* dcom atom */

  1378.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1379.         return -1;

  1380.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1381.         dprintf("unknown compression for cmov atom !");

  1382.         return -1;

  1383.     }

  1384.     get_be32(pb); /* cmvd atom */

  1385.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1386.         return -1;

  1387.     moov_len = get_be32(pb); /* uncompressed size */

  1388.     cmov_len = atom.size - 6 * 4;

  1389. 

  1390.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1391.     if (!cmov_data)

  1392.         return -1;

  1393.     moov_data = (uint8_t *) av_malloc(moov_len);

  1394.     if (!moov_data) {

  1395.         av_free(cmov_data);

  1396.         return -1;

  1397.     }

  1398.     get_buffer(pb, cmov_data, cmov_len);

  1399.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1400.         return -1;

  1401.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1402.         return -1;

  1403.     ctx.buf_end = ctx.buffer + moov_len;

  1404.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1405.     atom.offset = 0;

  1406.     atom.size = moov_len;

  1407. #ifdef DEBUG

  1408.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1409. #endif

  1410.     ret = mov_read_default(c, &ctx, atom);

  1411.     av_free(moov_data);

  1412.     av_free(cmov_data);

  1413. 

  1414.     return ret;

  1415. }

  1416. #endif

  1417. 

  1418. static const MOVParseTableEntry mov_default_parse_table[] = {

  1419. /* mp4 atoms */

  1420. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1421. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1422. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1423. { MKTAG( 'c', 't', 't', 's' ), mov_read_leaf }, /* composition time to sample */

  1424. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1425. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1426. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1427. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1428. { MKTAG( 'e', 'l', 's', 't' ), mov_read_leaf },

  1429. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1430. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1431. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1432. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1433. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1434. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1435. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1436. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1437. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1438. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1439. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1440. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1441. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1442. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1443. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1444. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1445. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1446. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1447. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_default },

  1448. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1449. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorrenson extension ??? */

  1450. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1451. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1452. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1453. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1454. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1455. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1456. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1457. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1458. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1459. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1460. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1461. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1462. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1463. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1464. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1465. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },

  1466. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1467. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1468. /* extra mp4 */

  1469. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1470. /* QT atoms */

  1471. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1472. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1473. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1474. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1475. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1476. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1477. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1478. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1479. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1480. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1481. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1482. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1483. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1484. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1485. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1486. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1487. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1488. #ifdef CONFIG_ZLIB

  1489. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1490. #else

  1491. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1492. #endif

  1493. { 0L, mov_read_leaf }

  1494. };

  1495. 

  1496. static void mov_free_stream_context(MOVStreamContext *sc)

  1497. {

  1498.     if(sc) {

  1499.         av_free(sc->chunk_offsets);

  1500.         av_free(sc->sample_to_chunk);

  1501.         av_free(sc->sample_sizes);

  1502.         av_free(sc->keyframes);

  1503.         av_free(sc->header_data);

  1504.         av_free(sc);

  1505.     }

  1506. }

  1507. 

  1508. static inline uint32_t mov_to_tag(uint8_t *buf)

  1509. {

  1510.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1511. }

  1512. 

  1513. static inline uint32_t to_be32(uint8_t *buf)

  1514. {

  1515.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1516. }

  1517. 

  1518. /* XXX: is it sufficient ? */

  1519. static int mov_probe(AVProbeData *p)

  1520. {

  1521.     unsigned int offset;

  1522.     uint32_t tag;

  1523. 

  1524.     /* check file header */

  1525.     if (p->buf_size <= 12)

  1526.         return 0;

  1527.     offset = 0;

  1528.     for(;;) {

  1529.         /* ignore invalid offset */

  1530.         if ((offset + 8) > (unsigned int)p->buf_size)

  1531.             return 0;

  1532.         tag = mov_to_tag(p->buf + offset + 4);

  1533.         switch(tag) {

  1534.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1535.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1536.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1537.         case MKTAG( 'm', 'd', 'a', 't' ):

  1538.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1539.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1540.             return AVPROBE_SCORE_MAX;

  1541.         case MKTAG( 'f', 't', 'y', 'p' ):

  1542.         case MKTAG( 's', 'k', 'i', 'p' ):

  1543.             offset = to_be32(p->buf+offset) + offset;

  1544.             break;

  1545.         default:

  1546.             /* unrecognized tag */

  1547.             return 0;

  1548.         }

  1549.     }

  1550.     return 0;

  1551. }

  1552. 

  1553. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1554. {

  1555.     MOVContext *mov = (MOVContext *) s->priv_data;

  1556.     ByteIOContext *pb = &s->pb;

  1557.     int i, j, nb, err;

  1558.     MOV_atom_t atom = { 0, 0, 0 };

  1559. 

  1560.     mov->fc = s;

  1561.     mov->parse_table = mov_default_parse_table;

  1562. #if 0

  1563.     /* XXX: I think we should auto detect */

  1564.     if(s->iformat->name[1] == 'p')

  1565.         mov->mp4 = 1;

  1566. #endif

  1567.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1568. 	atom.size = url_filesize(url_fileno(pb));

  1569.     else

  1570. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1571. 

  1572. #ifdef DEBUG

  1573.     printf("filesz=%Ld\n", atom.size);

  1574. #endif

  1575. 

  1576.     /* check MOV header */

  1577.     err = mov_read_default(mov, pb, atom);

  1578.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1579. 	av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",

  1580. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1581. 	return -1;

  1582.     }

  1583. #ifdef DEBUG

  1584.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1585. #endif

  1586.     /* some cleanup : make sure we are on the mdat atom */

  1587.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1588.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1589. 

  1590.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1591. 

  1592. #ifdef DEBUG

  1593.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1594. #endif

  1595. 

  1596. #ifdef DEBUG

  1597.     printf("streams= %d\n", s->nb_streams);

  1598. #endif

  1599.     mov->total_streams = nb = s->nb_streams;

  1600. 

  1601. #if 1

  1602.     for(i=0; i<s->nb_streams;) {

  1603.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1604.             av_free(s->streams[i]);

  1605.             for(j=i+1; j<s->nb_streams; j++)

  1606.                 s->streams[j-1] = s->streams[j];

  1607.             s->nb_streams--;

  1608.         } else

  1609.             i++;

  1610.     }

  1611.     for(i=0; i<s->nb_streams;i++) {

  1612.         MOVStreamContext *sc;

  1613.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1614.         sc->ffindex = i;

  1615.         sc->is_ff_stream = 1;

  1616.     }

  1617. #endif

  1618. #ifdef DEBUG

  1619.     printf("real streams= %d\n", s->nb_streams);

  1620. #endif

  1621.     return 0;

  1622. }

  1623. 

  1624. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1625. /* XXX:remove useless commented code sometime */

  1626. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1627. {

  1628.     MOVContext *mov = (MOVContext *) s->priv_data;

  1629.     MOVStreamContext *sc;

  1630.     int64_t offset = 0x0FFFFFFFFFFFFFFFLL;

  1631.     int i, a, b, m;

  1632.     int size;

  1633.     size = 0x0FFFFFFF;

  1634. 

  1635. #ifdef MOV_SPLIT_CHUNKS

  1636.     if (mov->partial) {

  1637. 

  1638.         int idx;

  1639. 

  1640. 	sc = mov->partial;

  1641. 	idx = sc->sample_to_chunk_index;

  1642. 

  1643.         if (idx < 0) return 0;

  1644. 	size = sc->sample_sizes[sc->current_sample];

  1645. 

  1646.         sc->current_sample++;

  1647.         sc->left_in_chunk--;

  1648. 

  1649.         if (sc->left_in_chunk <= 0)

  1650.             mov->partial = 0;

  1651.         offset = mov->next_chunk_offset;

  1652.         /* extract the sample */

  1653. 

  1654.         goto readchunk;

  1655.     }

  1656. #endif

  1657. 

  1658. again:

  1659.     sc = 0;

  1660.     for(i=0; i<mov->total_streams; i++) {

  1661. 	MOVStreamContext *msc = mov->streams[i];

  1662. 	//printf("MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1663.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1664. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1665. 	    sc = msc;

  1666. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1667. 	    //printf("SELETED  %Ld  i:%d\n", offset, i);

  1668.         }

  1669.     }

  1670.     if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)

  1671. 	return -1;

  1672. 

  1673.     sc->next_chunk++;

  1674. 

  1675.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1676.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1677.         mov->next_chunk_offset = offset;

  1678.     }

  1679. 

  1680. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1681.     if(!sc->is_ff_stream) {

  1682.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1683.         mov->next_chunk_offset = offset;

  1684. 	offset = 0x0FFFFFFFFFFFFFFFLL;

  1685.         goto again;

  1686.     }

  1687. 

  1688.     /* now get the chunk size... */

  1689. 

  1690.     for(i=0; i<mov->total_streams; i++) {

  1691. 	MOVStreamContext *msc = mov->streams[i];

  1692. 	if ((msc->next_chunk < msc->chunk_count)

  1693. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1694. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1695.     }

  1696. 

  1697. #ifdef MOV_MINOLTA_FIX

  1698.     //Make sure that size is according to sample_size (Needed by .mov files 

  1699.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1700.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1701.     //but I have no such movies

  1702.     if (sc->sample_size > 0) { 

  1703.         int foundsize=0;

  1704.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1705.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) && (sc->sample_size>0) )

  1706.             {

  1707. 		// I can't figure out why for PCM audio sample_size is always 1

  1708. 		// (it should actually be channels*bits_per_second/8) but it is.

  1709. 		AVCodecContext* cod = &s->streams[sc->ffindex]->codec;

  1710.                 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))

  1711. 		    foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;

  1712. 		else

  1713. 		    foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1714.             }

  1715. #ifdef DEBUG

  1716.             /*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);*/

  1717. #endif

  1718.         }

  1719.         if( (foundsize>0) && (foundsize<size) )

  1720.         {

  1721. #ifdef DEBUG

  1722.             /*printf("this size should actually be %d\n",foundsize);*/

  1723. #endif

  1724.             size=foundsize;

  1725.         }

  1726.     }

  1727. #endif //MOV_MINOLTA_FIX

  1728. 

  1729. #ifdef MOV_SPLIT_CHUNKS

  1730.     /* split chunks into samples */

  1731.     if (sc->sample_size == 0) {

  1732.         int idx = sc->sample_to_chunk_index;

  1733.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1734. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1735.            idx++;

  1736.         sc->sample_to_chunk_index = idx;

  1737.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1738. 	    mov->partial = sc;

  1739.             /* we'll have to get those samples before next chunk */

  1740.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1741.             size = sc->sample_sizes[sc->current_sample];

  1742.         }

  1743. 

  1744.         sc->current_sample++;

  1745.     }

  1746. #endif

  1747. 

  1748. readchunk:

  1749. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1750.     if(size == 0x0FFFFFFF)

  1751.         size = mov->mdat_size + mov->mdat_offset - offset;

  1752.     if(size < 0)

  1753.         return -1;

  1754.     if(size == 0)

  1755.         return -1;

  1756.     url_fseek(&s->pb, offset, SEEK_SET);

  1757. 

  1758.     //printf("READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1759.     if (sc->header_len > 0) {

  1760.         av_new_packet(pkt, size + sc->header_len);

  1761.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1762.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1763.         /* free header */

  1764.         av_freep(&sc->header_data);

  1765.         sc->header_len = 0;

  1766.     } else {

  1767.         av_new_packet(pkt, size);

  1768.         get_buffer(&s->pb, pkt->data, pkt->size);

  1769.     }

  1770.     pkt->stream_index = sc->ffindex;

  1771.     

  1772.     // If the keyframes table exists, mark any samples that are in the table as key frames.

  1773.     // If no table exists, treat very sample as a key frame.

  1774.     if (sc->keyframes) {        

  1775.         a = 0;

  1776.         b = sc->keyframe_count - 1;

  1777.         

  1778.         while (a < b) {

  1779.             m = (a + b + 1) >> 1;

  1780.             if (sc->keyframes[m] > sc->current_sample) {

  1781.                 b = m - 1;

  1782.             } else {

  1783.                 a = m;

  1784.             }    

  1785.         }

  1786.         

  1787.         if (sc->keyframes[a] == sc->current_sample)

  1788.             pkt->flags |= PKT_FLAG_KEY;

  1789.     }

  1790.     else

  1791.         pkt->flags |= PKT_FLAG_KEY;

  1792. 

  1793. #ifdef DEBUG

  1794. /*

  1795.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1796.     for(i=0; i<8; i++)

  1797.         printf("%02x ", pkt->data[i]);

  1798.     for(i=0; i<8; i++)

  1799.         printf("%c ", (pkt->data[i]) & 0x7F);

  1800.     puts("");

  1801. */

  1802. #endif

  1803. 

  1804.     mov->next_chunk_offset = offset + size;

  1805. 

  1806.     return 0;

  1807. }

  1808. 

  1809. static int mov_read_close(AVFormatContext *s)

  1810. {

  1811.     int i;

  1812.     MOVContext *mov = (MOVContext *) s->priv_data;

  1813.     for(i=0; i<mov->total_streams; i++)

  1814.         mov_free_stream_context(mov->streams[i]);

  1815.     /* free color tabs */

  1816.     for(i=0; i<mov->ctab_size; i++)

  1817. 	av_freep(&mov->ctab[i]);

  1818.     av_freep(&mov->ctab);

  1819.     return 0;

  1820. }

  1821. 

  1822. static AVInputFormat mov_iformat = {

  1823.     "mov,mp4,m4a,3gp",

  1824.     "QuickTime/MPEG4 format",

  1825.     sizeof(MOVContext),

  1826.     mov_probe,

  1827.     mov_read_header,

  1828.     mov_read_packet,

  1829.     mov_read_close,

  1830. };

  1831. 

  1832. int mov_init(void)

  1833. {

  1834.     av_register_input_format(&mov_iformat);

  1835.     return 0;

  1836. }