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FFmpeg/libav/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. 

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

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

  56. #define MOV_SPLIT_CHUNKS

  57. 

  58. #ifdef DEBUG

  59. /*

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

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

  62.  */

  63. static int debug_indent = 0;

  64. void print_atom(const char *str, UINT32 type, UINT64 offset, UINT64 size)

  65. {

  66.     unsigned int tag, i;

  67.     tag = (unsigned int) type;

  68.     i=debug_indent;

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

  70.     while(i--)

  71.         printf("|");

  72.     printf("parse:");

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

  74.            str, tag & 0xff,

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

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

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

  78.            (unsigned int)offset,

  79.            (unsigned int)size);

  80. }

  81. #endif

  82. 

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

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

  85. /* getting rid of these */

  86. #define CODEC_TYPE_MOV_OTHER 2

  87. 

  88. static const CodecTag mov_video_tags[] = {

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

  90. /*  { CODEC_ID_JPEG, MKTAG('j', 'p', 'e', 'g') }, *//* JPEG */

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

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

  93. /* Graphics */

  94. /* Animation */

  95. /* Apple video */

  96. /* Kodak Photo CD */

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

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

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

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

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

  102. /* Sorenson video */

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

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

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

  106.     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') }, /* OpenDiVX *//* yeah ! */

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

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

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

  110.     { 0, 0 }, 

  111. };

  112. 

  113. static const CodecTag mov_audio_tags[] = {

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

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

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

  117.     { CODEC_ID_PCM_U8, 0x20776172 }, /* 8 bits unsigned */

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

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

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

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

  122. 

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

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

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

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

  127. /* MP4 tags */

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

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

  130.     { 0, 0 }, 

  131. };

  132. 

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

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

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

  136.  */

  137. 

  138. typedef struct MOV_sample_to_chunk_tbl {

  139.     long first;

  140.     long count;

  141.     long id;

  142. } MOV_sample_to_chunk_tbl;

  143. 

  144. typedef struct MOVStreamContext {

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

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

  147.     long next_chunk;

  148.     long chunk_count;

  149.     INT64 *chunk_offsets;

  150.     long sample_to_chunk_sz;

  151.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  152.     long sample_to_chunk_index;

  153.     long sample_size;

  154.     long sample_count;

  155.     long *sample_sizes;

  156.     long time_scale;

  157.     long current_sample;

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

  159. } MOVStreamContext;

  160. 

  161. typedef struct MOVContext {

  162.     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) */

  163.     AVFormatContext *fc;

  164.     long time_scale;

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

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

  167.     INT64 mdat_size;

  168.     INT64 mdat_offset;

  169.     int total_streams;

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

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

  172.      */

  173.     MOVStreamContext *streams[MAX_STREAMS];

  174.     

  175.     INT64 next_chunk_offset;

  176.     int partial; /* != 0 : there is still to read in the current chunk (=id of the stream + 1) */

  177. } MOVContext;

  178. 

  179. 

  180. struct MOVParseTableEntry;

  181. 

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

  183. 

  184. /* those functions parse an atom */

  185. /* return code:

  186.  1: found what I wanted, exit

  187.  0: continue to parse next atom

  188.  -1: error occured, exit

  189.  */

  190. typedef int (*mov_parse_function)(const struct MOVParseTableEntry *parse_table,

  191.                                   ByteIOContext *pb,

  192.                                   UINT32 atom_type,

  193.                                   INT64 atom_offset, /* after the size and type field (and eventually the extended size) */

  194.                                   INT64 atom_size, /* total size (excluding the size and type fields) */

  195.                                   void *param);

  196. 

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

  198. typedef struct MOVParseTableEntry {

  199.     UINT32 type;

  200.     mov_parse_function func;

  201. } MOVParseTableEntry;

  202. 

  203. static int parse_leaf(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  204. {

  205. #ifdef DEBUG

  206.     print_atom("leaf", atom_type, atom_offset, atom_size);

  207. #endif

  208.     if(atom_size>1)

  209.         url_fskip(pb, atom_size);

  210. /*        url_seek(pb, atom_offset+atom_size, SEEK_SET); */

  211.     return 0;

  212. }

  213. 

  214. 

  215. static int parse_default(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  216. {

  217.     UINT32 type, foo=0;

  218.     UINT64 offset, size;

  219.     UINT64 total_size = 0;

  220.     int i;

  221.     int err = 0;

  222.     foo=0;

  223. #ifdef DEBUG

  224.     print_atom("default", atom_type, atom_offset, atom_size);

  225.     debug_indent++;

  226. #endif

  227.     

  228.     offset = atom_offset;

  229. 

  230.     if(atom_size < 0)

  231.         atom_size = 0x0FFFFFFFFFFFFFFF;

  232.     while((total_size < atom_size) && !url_feof(pb) && !err) {

  233.         size=atom_size;

  234.         type=0L;

  235.         if(atom_size >= 8) {

  236.             size = get_be32(pb);

  237.             type = get_le32(pb);

  238.         }

  239.         total_size += 8;

  240.         offset+=8;

  241. //        printf("type: %08lx  sz: %08lx", type, size);

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

  243.             size = get_be64(pb);

  244.             offset+=8;

  245.             total_size+=8;

  246.             size-=8;

  247.         }

  248.         if(size == 0)

  249.             size = atom_size - total_size;

  250.         size-=8;

  251.         for(i=0; parse_table[i].type != 0L && parse_table[i].type != type; i++);

  252.         

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

  254. 	if (parse_table[i].type == 0) { /* skip leaf atoms data */

  255. //            url_seek(pb, atom_offset+atom_size, SEEK_SET);

  256. #ifdef DEBUG

  257.             print_atom("unknown", type, offset, size);

  258. #endif

  259.             url_fskip(pb, size);

  260.         } else

  261.             err = (parse_table[i].func)(parse_table, pb, type, offset, size, param);

  262. 

  263.         offset+=size;

  264.         total_size+=size;

  265.     }

  266. 

  267. #ifdef DEBUG

  268.     debug_indent--;

  269. #endif

  270.     return err;

  271. }

  272. 

  273. static int parse_mvhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  274. {

  275.     MOVContext *c;

  276. #ifdef DEBUG

  277.     print_atom("mvhd", atom_type, atom_offset, atom_size);

  278. #endif

  279.     c = (MOVContext *)param;

  280. 

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

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

  283. 

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

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

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

  287. #ifdef DEBUG

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

  289. #endif

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

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

  292.     

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

  294. 

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

  296. 

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

  298. 

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

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

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

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

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

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

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

  306.     

  307.     return 0;

  308. }

  309. 

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

  311. static int parse_moov(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  312. {

  313.     int err;

  314.     MOVContext *c;

  315. #ifdef DEBUG

  316.     print_atom("moov", atom_type, atom_offset, atom_size);

  317. #endif

  318.     c = (MOVContext *)param;

  319. 

  320.     err = parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);

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

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

  323.     c->found_moov=1;

  324.     if(c->found_mdat)

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

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

  327. }

  328. 

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

  330. static int parse_mdat(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  331. {

  332.     MOVContext *c;

  333. #ifdef DEBUG

  334.     print_atom("mdat", atom_type, atom_offset, atom_size);

  335. #endif

  336.     c = (MOVContext *)param;

  337. 

  338.     if(atom_size == 0) /* wrong one (MP4) */

  339.         return 0;

  340.     c->found_mdat=1;

  341.     c->mdat_offset = atom_offset;

  342.     c->mdat_size = atom_size;

  343.     if(c->found_moov)

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

  345.     url_fskip(pb, atom_size);

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

  347. }

  348. 

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

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

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

  352. static int parse_wide(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  353. {

  354.     int err;

  355.     UINT32 type;

  356. #ifdef DEBUG

  357.     print_atom("wide", atom_type, atom_offset, atom_size);

  358.     debug_indent++;

  359. #endif

  360.     if (atom_size < 8)

  361.         return 0; /* continue */

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

  363.         url_fskip(pb, atom_size - 4);

  364.         return 0;

  365.     }

  366.     type = get_le32(pb);

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

  368.         url_fskip(pb, atom_size - 8);

  369.         return 0;

  370.     }

  371.     err = parse_mdat(parse_table, pb, type, atom_offset + 8, atom_size - 8, param);

  372. #ifdef DEBUG

  373.     debug_indent--;

  374. #endif

  375.     return err;

  376. }

  377. 

  378. static int parse_trak(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  379. {

  380.     MOVContext *c;

  381.     AVStream *st;

  382.     MOVStreamContext *sc;

  383. #ifdef DEBUG

  384.     print_atom("trak", atom_type, atom_offset, atom_size);

  385. #endif

  386. 

  387.     c = (MOVContext *)param;

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

  389.     if (!st) return -2;

  390.     sc = av_malloc(sizeof(MOVStreamContext));

  391.     sc->sample_to_chunk_index = -1;

  392.     st->priv_data = sc;

  393.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

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

  395.     return parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);

  396. }

  397. 

  398. static int parse_tkhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  399. {

  400.     MOVContext *c;

  401.     AVStream *st;

  402. #ifdef DEBUG

  403.     print_atom("tkhd", atom_type, atom_offset, atom_size);

  404. #endif

  405. 

  406.     c = (MOVContext *)param;

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

  408.     

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

  410. 

  411.     get_byte(pb); get_byte(pb);

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

  413.     /*

  414.     MOV_TRACK_ENABLED 0x0001

  415.     MOV_TRACK_IN_MOVIE 0x0002

  416.     MOV_TRACK_IN_PREVIEW 0x0004

  417.     MOV_TRACK_IN_POSTER 0x0008

  418.     */

  419. 

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

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

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

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

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

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

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

  427.     

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

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

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

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

  432. 

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

  434. 

  435.     /* those are fixed-point */

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

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

  438.     

  439.     return 0;

  440. }

  441. 

  442. static int parse_mdhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  443. {

  444.     MOVContext *c;

  445.     AVStream *st;

  446. #ifdef DEBUG

  447.     print_atom("mdhd", atom_type, atom_offset, atom_size);

  448. #endif

  449. 

  450.     c = (MOVContext *)param;

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

  452.     

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

  454. 

  455.     get_byte(pb); get_byte(pb);

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

  457. 

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

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

  460. 

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

  462. 

  463. #ifdef DEBUG

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

  465. #endif

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

  467. 

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

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

  470.     

  471.     return 0;

  472. }

  473. 

  474. static int parse_hdlr(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  475. {

  476.     MOVContext *c;

  477.     int len = 0;

  478.     char *buf;

  479.     UINT32 type;

  480.     AVStream *st;

  481.     UINT32 ctype;

  482. #ifdef DEBUG

  483.     print_atom("hdlr", atom_type, atom_offset, atom_size);

  484. #endif

  485.     c = (MOVContext *)param;

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

  487. 

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

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

  490. 

  491.     /* component type */

  492.     ctype = get_le32(pb);

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

  494. 

  495. #ifdef DEBUG

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

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

  498. #endif

  499. #ifdef DEBUG

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

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

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

  503.             puts("hdlr: vide");

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

  505.             puts("hdlr: soun");

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

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

  508.             puts("hdlr: vide");

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

  510.             puts("hdlr: soun");

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

  512.             puts("hdlr: odsm");

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

  514.             puts("hdlr: sdsm");

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

  516. #endif

  517. 

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

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

  520.         c->mp4 = 0;

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

  522.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  524.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  527.         c->mp4 = 1;

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

  529.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  531.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  532.     }

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

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

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

  536. 

  537.     if(atom_size <= 24)

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

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

  540.     /* component name */

  541. 

  542.     if(c->mp4) {

  543.         /* .mp4: C string */

  544.         while(get_byte(pb) && (++len < (atom_size - 24)));

  545.     } else {

  546.         /* .mov: PASCAL string */

  547.         len = get_byte(pb);

  548.         buf = av_malloc(len+1);

  549.         get_buffer(pb, buf, len);

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

  551. #ifdef DEBUG

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

  553. #endif

  554.         av_free(buf);

  555.     }

  556. #if 0

  557.     len = get_byte(pb);

  558.     /* XXX: use a better heuristic */

  559.     if(len < 32) {

  560.         /* assume that it is a Pascal like string */

  561.         buf = av_malloc(len+1);

  562.         get_buffer(pb, buf, len);

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

  564. #ifdef DEBUG

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

  566. #endif

  567.         av_free(buf);

  568.     } else {

  569.         /* MP4 string */

  570.         for(;;) {

  571.             if (len == 0)

  572.                 break;

  573.             len = get_byte(pb);

  574.         }

  575.     }

  576. #endif

  577.     

  578.     return 0;

  579. }

  580. 

  581. static int parse_stsd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  582. {

  583.     MOVContext *c;

  584.     int entries, size, samp_sz, frames_per_sample;

  585.     UINT32 format;

  586.     AVStream *st;

  587. #ifdef DEBUG

  588.     print_atom("stsd", atom_type, atom_offset, atom_size);

  589. #endif

  590.     c = (MOVContext *)param;

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

  592. 

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

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

  595. 

  596. 

  597.     entries = get_be32(pb);

  598. 

  599.     while(entries--) {

  600.         size = get_be32(pb); /* size */

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

  602.         

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

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

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

  606. /*        if(format == MKTAG('m', 'p', '4', 'v')) */

  607. /*            st->codec.codec_type=CODEC_TYPE_VIDEO; *//* force things (XXX: was this for .mp4 ?) */

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

  609.             st->codec.codec_tag = format;

  610.             st->codec.codec_id = codec_get_id(mov_video_tags, format);

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

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

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

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

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

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

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

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

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

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

  621.             frames_per_sample = get_be16(pb); /* frame per samples */

  622. #ifdef DEBUG

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

  624. #endif

  625.             url_fskip(pb, 32); /* codec name */

  626. 

  627.             get_be16(pb); /* depth */

  628.             get_be16(pb); /* colortable id */

  629.             get_be16(pb); /*  */

  630.             get_be16(pb); /*  */

  631.             

  632.             st->codec.sample_rate = 25 * FRAME_RATE_BASE;

  633.             

  634.             if(size > 16)

  635.                 url_fskip(pb, size-(16+24+18+32));

  636.         } else {

  637.             st->codec.codec_tag = format;

  638. 

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

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

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

  642. 

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

  644.             samp_sz = get_be16(pb); /* sample size */

  645. #ifdef DEBUG

  646.             if(samp_sz != 16)

  647.                 puts("!!! stsd: audio sample size is not 16 bit !");

  648. #endif            

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

  650.             /* handle specific s8 codec */

  651.             if (st->codec.codec_id == CODEC_ID_PCM_S16BE && samp_sz == 8)

  652.             st->codec.codec_id = CODEC_ID_PCM_S8;

  653. 

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

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

  656.             

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

  658.             st->codec.bit_rate = 0;

  659. 

  660.             /* this is for .mp4 files */

  661.             if(format == MKTAG('m', 'p', '4', 'v')) { /* XXX */

  662.                 st->codec.codec_type=CODEC_TYPE_VIDEO; /* force things */

  663.                 st->codec.codec_id = CODEC_ID_MPEG4;

  664.                 st->codec.frame_rate = 25 * FRAME_RATE_BASE;

  665.                 st->codec.bit_rate = 100000;

  666.             }

  667. //            if(format == MKTAG('m', 'p', '4', 'a')) { /* XXX */

  668. //                st->codec.codec_type=CODEC_TYPE_AUDIO; /* force things */

  669. //                st->codec.codec_id = CODEC_ID_AAC;

  670. ////                st->codec.frame_rate = 25 * FRAME_RATE_BASE;

  671. ////                st->codec.bit_rate = 100000;

  672. //            }

  673. 

  674. #if 0

  675. 

  676.             get_be16(pb); get_be16(pb); /*  */

  677.             get_be16(pb); /*  */

  678.             get_be16(pb); /*  */

  679.             get_be16(pb); /*  */

  680.             get_be16(pb); /*  */

  681. #endif            

  682.             if(size > 16)

  683.                 url_fskip(pb, size-(16+20));

  684.         }

  685. #ifdef DEBUG

  686.         printf("4CC= %c%c%c%c\n", *((char *)&format), ((char *)&format)[1], ((char *)&format)[2], ((char *)&format)[3]);

  687. #endif

  688.     }

  689. /*

  690.     if(len) {

  691.     buf = av_malloc(len+1);

  692.         get_buffer(pb, buf, len);

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

  694.         puts(buf);

  695.         av_free(buf);

  696.     }

  697. */

  698.     return 0;

  699. }

  700. 

  701. static int parse_stco(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  702. {

  703.     MOVContext *c;

  704.     int entries, i;

  705.     AVStream *st;

  706.     MOVStreamContext *sc;

  707. #ifdef DEBUG

  708.     print_atom("stco", atom_type, atom_offset, atom_size);

  709. #endif

  710.     c = (MOVContext *)param;

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

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

  713.     

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

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

  716. 

  717.     entries = get_be32(pb);

  718.     sc->chunk_count = entries;

  719.     sc->chunk_offsets = av_malloc(entries * sizeof(INT64));

  720.     if(atom_type == MKTAG('s', 't', 'c', 'o')) {

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

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

  723.             /*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/

  724.         }

  725.     } else if(atom_type == MKTAG('c', 'o', '6', '4')) {

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

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

  728.             /*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/

  729.         }

  730.     } else

  731.         return -1;

  732.     return 0;

  733. }

  734. 

  735. static int parse_stsc(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  736. {

  737.     MOVContext *c;

  738.     int entries, i;

  739.     AVStream *st;

  740.     MOVStreamContext *sc;

  741. #ifdef DEBUG

  742.     print_atom("stsc", atom_type, atom_offset, atom_size);

  743. #endif

  744.     c = (MOVContext *)param;

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

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

  747.     

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

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

  750. 

  751.     entries = get_be32(pb);

  752. #ifdef DEBUG

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

  754. #endif

  755.     sc->sample_to_chunk_sz = entries;

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

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

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

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

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

  761. #ifdef DEBUG

  762. /*        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); */

  763. #endif

  764.     }

  765.     return 0;

  766. }

  767. 

  768. static int parse_stsz(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  769. {

  770.     MOVContext *c;

  771.     int entries, i;

  772.     AVStream *st;

  773.     MOVStreamContext *sc;

  774. #ifdef DEBUG

  775.     print_atom("stsz", atom_type, atom_offset, atom_size);

  776. #endif

  777.     c = (MOVContext *)param;

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

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

  780.     

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

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

  783.     

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

  785.     entries = get_be32(pb);

  786.     sc->sample_count = entries;

  787. #ifdef DEBUG

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

  789. #endif

  790.     if(sc->sample_size)

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

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

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

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

  795. #ifdef DEBUG

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

  797. #endif

  798.     }

  799.     return 0;

  800. }

  801. 

  802. static int parse_stts(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  803. {

  804.     MOVContext *c;

  805.     int entries, i;

  806.     AVStream *st;

  807.     MOVStreamContext *sc;

  808. #ifdef DEBUG

  809.     print_atom("stts", atom_type, atom_offset, atom_size);

  810. #endif

  811.     c = (MOVContext *)param;

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

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

  814. 

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

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

  817.     entries = get_be32(pb);

  818. #ifdef DEBUG

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

  820. #endif

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

  822.         int sample_duration;

  823. 

  824.         get_be32(pb);

  825.         sample_duration = get_be32(pb);

  826. 

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

  828.             st->codec.frame_rate = FRAME_RATE_BASE * c->streams[c->total_streams]->time_scale;

  829.             if (sample_duration)

  830.                 st->codec.frame_rate /= sample_duration;

  831. #ifdef DEBUG

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

  833. #endif

  834.         }

  835.     }

  836.     return 0;

  837. }

  838. 

  839. #ifdef CONFIG_ZLIB

  840. static int null_read_packet(void *opaque, UINT8 *buf, int buf_size)

  841. {

  842.     return -1;

  843. }

  844. 

  845. static int parse_cmov(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  846. {

  847.     MOVContext *c;

  848.     ByteIOContext ctx;

  849.     char *cmov_data;

  850.     unsigned char *moov_data; /* uncompressed data */

  851.     long cmov_len, moov_len;

  852.     int ret;

  853. #ifdef DEBUG

  854.     print_atom("cmov", atom_type, atom_offset, atom_size);

  855. #endif

  856.     c = (MOVContext *)param;

  857. 

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

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

  860.         return -1;

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

  862.         puts("unknown compression for cmov atom !");

  863.         return -1;

  864.     }

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

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

  867.         return -1;

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

  869.     cmov_len = atom_size - 6 * 4;

  870.     

  871.     cmov_data = av_malloc(cmov_len);

  872.     if (!cmov_data)

  873.         return -1;

  874.     moov_data = av_malloc(moov_len);

  875.     if (!moov_data) {

  876.         av_free(cmov_data);

  877.         return -1;

  878.     }

  879.     get_buffer(pb, cmov_data, cmov_len);

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

  881.         return -1;

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

  883.         return -1;

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

  885.     ret = parse_default(parse_table, &ctx, MKTAG( 'm', 'o', 'o', 'v' ), 0, moov_len, param);

  886.     av_free(moov_data);

  887.     av_free(cmov_data);

  888.     return ret;

  889. }

  890. #endif

  891. 

  892. static const MOVParseTableEntry mov_default_parse_table[] = {

  893. /* mp4 atoms */

  894. { MKTAG( 'm', 'p', '4', 'a' ), parse_default },

  895. { MKTAG( 'c', 'o', '6', '4' ), parse_stco },

  896. { MKTAG( 's', 't', 'c', 'o' ), parse_stco },

  897. { MKTAG( 'c', 'r', 'h', 'd' ), parse_default },

  898. { MKTAG( 'c', 't', 't', 's' ), parse_leaf },

  899. { MKTAG( 'c', 'p', 'r', 't' ), parse_default },

  900. { MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },

  901. { MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },

  902. { MKTAG( 'd', 'i', 'n', 'f' ), parse_default },

  903. { MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },

  904. { MKTAG( 's', 't', 'd', 'p' ), parse_default },

  905. { MKTAG( 'e', 's', 'd', 's' ), parse_default },

  906. { MKTAG( 'e', 'd', 't', 's' ), parse_default },

  907. { MKTAG( 'e', 'l', 's', 't' ), parse_leaf },

  908. { MKTAG( 'u', 'u', 'i', 'd' ), parse_default },

  909. { MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },

  910. { MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },

  911. { MKTAG( 'h', 'm', 'h', 'd' ), parse_leaf },

  912. { MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },

  913. { MKTAG( 'n', 'm', 'h', 'd' ), parse_leaf },

  914. { MKTAG( 'm', 'p', '4', 's' ), parse_default },

  915. { MKTAG( 'm', 'd', 'i', 'a' ), parse_default },

  916. { MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },

  917. { MKTAG( 'm', 'd', 'h', 'd' ), parse_mdhd },

  918. { MKTAG( 'm', 'i', 'n', 'f' ), parse_default },

  919. { MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },

  920. { MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },

  921. { MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },

  922. { MKTAG( 'o', 'd', 'h', 'd' ), parse_default },

  923. { MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },

  924. { MKTAG( 's', 't', 's', 'd' ), parse_stsd },

  925. { MKTAG( 's', 't', 's', 'z' ), parse_stsz },

  926. { MKTAG( 's', 't', 'b', 'l' ), parse_default },

  927. { MKTAG( 's', 't', 's', 'c' ), parse_stsc },

  928. { MKTAG( 's', 'd', 'h', 'd' ), parse_default },

  929. { MKTAG( 's', 't', 's', 'h' ), parse_default },

  930. { MKTAG( 's', 'k', 'i', 'p' ), parse_default },

  931. { MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },

  932. { MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },

  933. { MKTAG( 's', 't', 's', 's' ), parse_leaf },

  934. { MKTAG( 's', 't', 't', 's' ), parse_stts },

  935. { MKTAG( 't', 'r', 'a', 'k' ), parse_trak },

  936. { MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },

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

  938. { MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },

  939. { MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },

  940. { MKTAG( 'm', 'p', '4', 'v' ), parse_default },

  941. /* extra mp4 */

  942. { MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },

  943. /* QT atoms */

  944. { MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },

  945. { MKTAG( 'c', 'l', 'i', 'p' ), parse_default },

  946. { MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },

  947. { MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },

  948. { MKTAG( 'm', 'a', 't', 't' ), parse_default },

  949. { MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },

  950. { MKTAG( 'r', 'm', 'd', 'a' ), parse_default },

  951. { MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },

  952. //{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },

  953. { MKTAG( 'r', 'm', 'r', 'a' ), parse_default },

  954. { MKTAG( 's', 'c', 'p', 't' ), parse_leaf },

  955. { MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },

  956. { MKTAG( 's', 's', 'r', 'c' ), parse_leaf },

  957. { MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },

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

  959. #ifdef CONFIG_ZLIB

  960. { MKTAG( 'c', 'm', 'o', 'v' ), parse_cmov },

  961. #else

  962. { MKTAG( 'c', 'm', 'o', 'v' ), parse_leaf },

  963. #endif

  964. { 0L, parse_leaf }

  965. };

  966. 

  967. static void mov_free_stream_context(MOVStreamContext *sc)

  968. {

  969.     if(sc) {

  970.         av_free(sc->chunk_offsets);

  971.         av_free(sc->sample_to_chunk);

  972.         av_free(sc);

  973.     }

  974. }

  975. 

  976. /* XXX: is it suffisant ? */

  977. static int mov_probe(AVProbeData *p)

  978. {

  979.     int offset;

  980. 

  981.     /* check file header */

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

  983.         return 0;

  984.     if ((p->buf[4] == 'm' && p->buf[5] == 'o' &&

  985.          p->buf[6] == 'o' && p->buf[7] == 'v') ||

  986.         (p->buf[4] == 'w' && p->buf[5] == 'i' &&

  987.          p->buf[6] == 'd' && p->buf[7] == 'e') ||

  988.         (p->buf[4] == 'f' && p->buf[5] == 'r' &&

  989.          p->buf[6] == 'e' && p->buf[7] == 'e') ||

  990.         (p->buf[4] == 'm' && p->buf[5] == 'd' &&

  991.          p->buf[6] == 'a' && p->buf[7] == 't'))

  992.         return AVPROBE_SCORE_MAX;

  993.     if (p->buf[4] == 'f' && p->buf[5] == 't' &&

  994.         p->buf[6] == 'y' && p->buf[7] == 'p') {

  995.         offset = p->buf[0]; offset <<= 8;

  996.         offset |= p->buf[1]; offset <<= 8;

  997.         offset |= p->buf[2]; offset <<= 8;

  998.         offset |= p->buf[3];

  999.         if (offset > p->buf_size)

  1000.             return 0;

  1001.         if ((p->buf[offset+4] == 'm' && p->buf[offset+5] == 'o' &&

  1002.              p->buf[offset+6] == 'o' && p->buf[offset+7] == 'v') ||

  1003.             (p->buf[offset+4] == 'w' && p->buf[offset+5] == 'i' &&

  1004.              p->buf[offset+6] == 'd' && p->buf[offset+7] == 'e') ||

  1005.             (p->buf[offset+4] == 'm' && p->buf[offset+5] == 'd' &&

  1006.              p->buf[offset+6] == 'a' && p->buf[offset+7] == 't'))

  1007.             return AVPROBE_SCORE_MAX;

  1008. 

  1009.     }

  1010.     return 0;

  1011. }

  1012. 

  1013. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1014. {

  1015.     MOVContext *mov = s->priv_data;

  1016.     ByteIOContext *pb = &s->pb;

  1017.     int i, j, nb, err;

  1018.     INT64 size;

  1019. 

  1020.     mov->fc = s;

  1021. #if 0

  1022.     /* XXX: I think we should auto detect */

  1023.     if(s->iformat->name[1] == 'p')

  1024.         mov->mp4 = 1;

  1025. #endif

  1026.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1027.         size = url_filesize(url_fileno(pb));

  1028.     else

  1029.         size = 0x7FFFFFFFFFFFFFFF;

  1030. 

  1031. #ifdef DEBUG

  1032.     printf("filesz=%Ld\n", size);

  1033. #endif

  1034. 

  1035.     /* check MOV header */

  1036.     err = parse_default(mov_default_parse_table, pb, 0L, 0LL, size, mov);

  1037.     if(err<0 || (!mov->found_moov || !mov->found_mdat)) {

  1038.         puts("header not found !!!");

  1039.         exit(1);

  1040.     }

  1041. #ifdef DEBUG

  1042.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1043. #endif

  1044.     /* some cleanup : make sure we are on the mdat atom */

  1045.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1046.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1047. 

  1048.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1049. 

  1050. #ifdef DEBUG

  1051.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1052. #endif

  1053. 

  1054. #ifdef DEBUG

  1055.     printf("streams= %d\n", s->nb_streams);

  1056. #endif

  1057.     mov->total_streams = nb = s->nb_streams;

  1058.     

  1059. #if 1

  1060.     for(i=0; i<s->nb_streams;) {

  1061.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1062.             av_free(s->streams[i]);

  1063.             for(j=i+1; j<s->nb_streams; j++)

  1064.                 s->streams[j-1] = s->streams[j];

  1065.             s->nb_streams--;

  1066.         } else

  1067.             i++;

  1068.     }

  1069.     for(i=0; i<s->nb_streams;i++) {

  1070.         MOVStreamContext *sc;

  1071.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1072.         sc->ffindex = i;

  1073.         sc->is_ff_stream = 1;

  1074.     }

  1075. #endif

  1076. #ifdef DEBUG

  1077.     printf("real streams= %d\n", s->nb_streams);

  1078. #endif

  1079.     return 0;

  1080. }

  1081. 

  1082. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1083. /* XXX:remove useless commented code sometime */

  1084. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1085. {

  1086.     MOVContext *mov = s->priv_data;

  1087.     INT64 offset = 0x0FFFFFFFFFFFFFFF;

  1088.     int i;

  1089.     int st_id = 0, size;

  1090.     size = 0x0FFFFFFF;

  1091. 

  1092. #ifdef MOV_SPLIT_CHUNKS

  1093.     if (mov->partial) {

  1094.         

  1095.         int idx;

  1096. 

  1097.         st_id = mov->partial - 1;

  1098.         idx = mov->streams[st_id]->sample_to_chunk_index;

  1099.         if (idx < 0) return 0;

  1100.         size = mov->streams[st_id]->sample_sizes[mov->streams[st_id]->current_sample];

  1101. 

  1102.         mov->streams[st_id]->current_sample++;

  1103.         mov->streams[st_id]->left_in_chunk--;

  1104. 

  1105.         if(mov->streams[st_id]->left_in_chunk <= 0)

  1106.             mov->partial = 0;

  1107.         offset = mov->next_chunk_offset;

  1108.         /* extract the sample */

  1109. 

  1110.         goto readchunk;

  1111.     }

  1112. #endif

  1113. 

  1114. again:

  1115.     for(i=0; i<mov->total_streams; i++) {

  1116.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  1117.         && (mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] < offset)) {

  1118.             st_id = i;

  1119.             offset = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk];

  1120.         }

  1121.     }

  1122.     mov->streams[st_id]->next_chunk++;

  1123.     if(offset==0x0FFFFFFFFFFFFFFF)

  1124.         return -1;

  1125.     

  1126.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1127.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1128.         mov->next_chunk_offset = offset;

  1129.     }

  1130. 

  1131. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1132.     if(!mov->streams[st_id]->is_ff_stream) {

  1133.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1134.         mov->next_chunk_offset = offset;

  1135.         offset = 0x0FFFFFFFFFFFFFFF;

  1136.         goto again;

  1137.     }

  1138. 

  1139.     /* now get the chunk size... */

  1140. 

  1141.     for(i=0; i<mov->total_streams; i++) {

  1142.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  1143.         && ((mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset) < size)) {

  1144.             size = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset;

  1145.         }

  1146.     }

  1147. #ifdef MOV_SPLIT_CHUNKS

  1148.     /* split chunks into samples */

  1149.     if(mov->streams[st_id]->sample_size == 0) {

  1150.         int idx;

  1151.         idx = mov->streams[st_id]->sample_to_chunk_index;

  1152.         if ((idx + 1 < mov->streams[st_id]->sample_to_chunk_sz)

  1153.                && (mov->streams[st_id]->next_chunk >= mov->streams[st_id]->sample_to_chunk[idx + 1].first))

  1154.            idx++; 

  1155.         mov->streams[st_id]->sample_to_chunk_index = idx;

  1156.         if(idx >= 0 && mov->streams[st_id]->sample_to_chunk[idx].count != 1) {

  1157.             mov->partial = st_id+1;

  1158.             /* we'll have to get those samples before next chunk */

  1159.             mov->streams[st_id]->left_in_chunk = (mov->streams[st_id]->sample_to_chunk[idx].count) - 1;

  1160.             size = mov->streams[st_id]->sample_sizes[mov->streams[st_id]->current_sample];

  1161.         }

  1162. 

  1163.         mov->streams[st_id]->current_sample++;

  1164.     }

  1165. #endif

  1166. 

  1167. readchunk:

  1168. 

  1169. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1170.     if(size == 0x0FFFFFFF)

  1171.         size = mov->mdat_size + mov->mdat_offset - offset;

  1172.     if(size < 0)

  1173.         return -1;

  1174.     if(size == 0)

  1175.         return -1;

  1176.     av_new_packet(pkt, size);

  1177.     pkt->stream_index = mov->streams[st_id]->ffindex;

  1178. 

  1179.     get_buffer(&s->pb, pkt->data, pkt->size);

  1180. 

  1181. #ifdef DEBUG

  1182. /*

  1183.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1184.     for(i=0; i<8; i++)

  1185.         printf("%02x ", pkt->data[i]);

  1186.     for(i=0; i<8; i++)

  1187.         printf("%c ", (pkt->data[i]) & 0x7F);

  1188.     puts("");

  1189. */

  1190. #endif

  1191. 

  1192.     mov->next_chunk_offset = offset + size;

  1193. 

  1194.     return 0;

  1195. }

  1196. 

  1197. static int mov_read_close(AVFormatContext *s)

  1198. {

  1199.     int i;

  1200.     MOVContext *mov = s->priv_data;

  1201.     for(i=0; i<mov->total_streams; i++)

  1202.         mov_free_stream_context(mov->streams[i]);

  1203.     for(i=0; i<s->nb_streams; i++)

  1204.         av_free(s->streams[i]);

  1205.     return 0;

  1206. }

  1207. 

  1208. static AVInputFormat mov_iformat = {

  1209.     "mov",

  1210.     "QuickTime/MPEG4 format",

  1211.     sizeof(MOVContext),

  1212.     mov_probe,

  1213.     mov_read_header,

  1214.     mov_read_packet,

  1215.     mov_read_close,

  1216. };

  1217. 

  1218. int mov_init(void)

  1219. {

  1220.     av_register_input_format(&mov_iformat);

  1221.     return 0;

  1222. }