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FFmpeg/libavformat/mov.c

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  1. /*

  2.  * MOV decoder.

  3.  * Copyright (c) 2001 Fabrice Bellard.

  4.  *

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

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

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

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

  9.  *

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

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

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

  13.  * Lesser General Public License for more details.

  14.  *

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

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

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

  18.  */

  19. #include "avformat.h"

  20. #include "avi.h"

  21. 

  22. #ifdef CONFIG_ZLIB

  23. #include <zlib.h>

  24. #endif

  25. 

  26. /*

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

  28.  * 

  29.  * Features and limitations:

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

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

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

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

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

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

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

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

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

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

  40.  * 

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

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

  43.  * 

  44.  * Reference documents:

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

  46.  * Apple:

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

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

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

  50.  */

  51. 

  52. //#define DEBUG

  53. 

  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_t type, uint64_t offset, uint64_t 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.     assert((unsigned int)size < 0x7fffffff);// catching errors

  81. }

  82. #else

  83. #define print_atom(a,b,c,d)

  84. #endif

  85. 

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

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

  88. /* getting rid of these */

  89. #define CODEC_TYPE_MOV_OTHER	(enum CodecType) 2

  90. 

  91. static const CodecTag mov_video_tags[] = {

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

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

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

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

  96. /* Graphics */

  97. /* Animation */

  98. /* Apple video */

  99. /* Kodak Photo CD */

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

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

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

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

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

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

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

  107. /* Sorenson video */

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

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

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

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

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

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

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

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

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

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

  118.     { 0, 0 },

  119. };

  120. 

  121. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  132. 

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

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

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

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

  137. /* MP4 tags */

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

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

  140.     { 0, 0 }, 

  141. };

  142. 

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

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

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

  146.  */

  147. 

  148. typedef struct MOV_sample_to_chunk_tbl {

  149.     long first;

  150.     long count;

  151.     long id;

  152. } MOV_sample_to_chunk_tbl;

  153. 

  154. typedef struct {

  155.     uint8_t  version;

  156.     uint32_t flags; // 24bit

  157. 

  158.     /* 0x03 ESDescrTag */

  159.     uint16_t es_id;

  160. #define MP4ODescrTag			0x01

  161. #define MP4IODescrTag			0x02

  162. #define MP4ESDescrTag			0x03

  163. #define MP4DecConfigDescrTag		0x04

  164. #define MP4DecSpecificDescrTag		0x05

  165. #define MP4SLConfigDescrTag		0x06

  166. #define MP4ContentIdDescrTag		0x07

  167. #define MP4SupplContentIdDescrTag	0x08

  168. #define MP4IPIPtrDescrTag		0x09

  169. #define MP4IPMPPtrDescrTag		0x0A

  170. #define MP4IPMPDescrTag			0x0B

  171. #define MP4RegistrationDescrTag		0x0D

  172. #define MP4ESIDIncDescrTag		0x0E

  173. #define MP4ESIDRefDescrTag		0x0F

  174. #define MP4FileIODescrTag		0x10

  175. #define MP4FileODescrTag		0x11

  176. #define MP4ExtProfileLevelDescrTag	0x13

  177. #define MP4ExtDescrTagsStart		0x80

  178. #define MP4ExtDescrTagsEnd		0xFE

  179.     uint8_t  stream_priority;

  180. 

  181.     /* 0x04 DecConfigDescrTag */

  182.     uint8_t  object_type_id;

  183.     uint8_t  stream_type;

  184.     /* XXX: really streamType is

  185.      * only 6bit, followed by:

  186.      * 1bit  upStream

  187.      * 1bit  reserved

  188.      */

  189.     uint32_t buffer_size_db; // 24

  190.     uint32_t max_bitrate;

  191.     uint32_t avg_bitrate;

  192. 

  193.     /* 0x05 DecSpecificDescrTag */

  194.     uint8_t  decoder_cfg_len;

  195.     uint8_t *decoder_cfg;

  196. 

  197.     /* 0x06 SLConfigDescrTag */

  198.     uint8_t  sl_config_len;

  199.     uint8_t *sl_config;

  200. } MOV_esds_t;

  201. 

  202. struct MOVParseTableEntry;

  203. 

  204. typedef struct MOVStreamContext {

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

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

  207.     long next_chunk;

  208.     long chunk_count;

  209.     int64_t *chunk_offsets;

  210.     long sample_to_chunk_sz;

  211.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  212.     long sample_to_chunk_index;

  213.     long sample_size;

  214.     long sample_count;

  215.     long *sample_sizes;

  216.     int time_scale;

  217.     long current_sample;

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

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

  220.     int header_len;

  221.     MOV_esds_t esds;

  222.     uint8_t *header_data;

  223. } MOVStreamContext;

  224. 

  225. typedef struct MOVContext {

  226.     int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */

  227.     AVFormatContext *fc;

  228.     int time_scale;

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

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

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

  232.     int64_t mdat_size;

  233.     int64_t mdat_offset;

  234.     int total_streams;

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

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

  237.      */

  238.     MOVStreamContext *streams[MAX_STREAMS];

  239. 

  240.     int64_t next_chunk_offset;

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

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

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

  244. } MOVContext;

  245. 

  246. 

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

  248. 

  249. /* those functions parse an atom */

  250. /* return code:

  251.  1: found what I wanted, exit

  252.  0: continue to parse next atom

  253.  -1: error occured, exit

  254.  */

  255. typedef int (*mov_parse_function)(MOVContext *ctx,

  256.                                   ByteIOContext *pb,

  257.                                   uint32_t atom_type,

  258.                                   int64_t atom_offset, /* after the size and type field (and eventually the extended size) */

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

  260. 

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

  262. typedef struct MOVParseTableEntry {

  263.     uint32_t type;

  264.     mov_parse_function func;

  265. } MOVParseTableEntry;

  266. 

  267. static int parse_leaf(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  268. {

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

  270. 

  271.     if(atom_size>1)

  272.         url_fskip(pb, atom_size);

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

  274.     return 0;

  275. }

  276. 

  277. static int parse_default(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  278. {

  279.     uint32_t type, foo=0;

  280.     uint64_t offset, size;

  281.     int64_t total_size = 0;

  282.     int i;

  283.     int err = 0;

  284.     foo=0;

  285. #ifdef DEBUG

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

  287.     debug_indent++;

  288. #endif

  289. 

  290.     offset = atom_offset;

  291. 

  292.     if(atom_size < 0)

  293.         atom_size = 0x0FFFFFFFFFFFFFFF;

  294.     while(((total_size + 8) < atom_size) && !url_feof(pb) && !err) {

  295.         size=atom_size;

  296.         type=0L;

  297.         if(atom_size >= 8) {

  298. 	    size = get_be32(pb);

  299.             type = get_le32(pb);

  300.         }

  301. 	total_size += 8;

  302.         offset += 8;

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

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

  305.             size = get_be64(pb) - 8;

  306.             offset+=8;

  307.             total_size+=8;

  308.         }

  309. 	if(size == 0) {

  310. 	    size = atom_size - total_size;

  311. 	    if (size <= 8)

  312.                 break;

  313. 	}

  314. 	for (i=0; c->parse_table[i].type != 0L && c->parse_table[i].type != type; i++)

  315. 	    /* empty */;

  316. 

  317.         size -= 8;

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

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

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

  321. #ifdef DEBUG

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

  323. #endif

  324.             url_fskip(pb, size);

  325. 	} else {

  326. #ifdef DEBUG

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

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

  329. #endif

  330. 	    err = (c->parse_table[i].func)(c, pb, type, offset, size);

  331. 	}

  332. 

  333.         offset+=size;

  334.         total_size+=size;

  335.     }

  336. 

  337.     if (!err && total_size < atom_size && atom_size < 0x7ffff) {

  338. 	printf("RESET  %Ld  %Ld  err:%d\n", atom_size, total_size, err);

  339.         url_fskip(pb, atom_size - total_size);

  340.     }

  341. 

  342. #ifdef DEBUG

  343.     debug_indent--;

  344. #endif

  345.     return err;

  346. }

  347. 

  348. static int parse_ctab(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  349. {

  350.     url_fskip(pb, atom_size); // for now

  351.     return 0;

  352. }

  353. 

  354. static int parse_mvhd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  355. {

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

  357. 

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

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

  360. 

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

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

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

  364. #ifdef DEBUG

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

  366. #endif

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

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

  369. 

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

  371. 

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

  373. 

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

  375. 

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

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

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

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

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

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

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

  383.     

  384.     return 0;

  385. }

  386. 

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

  388. static int parse_moov(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  389. {

  390.     int err;

  391. 

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

  393. 

  394.     err = parse_default(c, pb, atom_type, atom_offset, atom_size);

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

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

  397.     c->found_moov=1;

  398.     if(c->found_mdat)

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

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

  401. }

  402. 

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

  404. static int parse_mdat(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  405. {

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

  407. 

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

  409.         return 0;

  410.     c->found_mdat=1;

  411.     c->mdat_offset = atom_offset;

  412.     c->mdat_size = atom_size;

  413.     if(c->found_moov)

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

  415.     url_fskip(pb, atom_size);

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

  417. }

  418. 

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

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

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

  422. static int parse_wide(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  423. {

  424.     int err;

  425.     uint32_t type;

  426. 

  427. #ifdef DEBUG

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

  429.     debug_indent++;

  430. #endif

  431.     if (atom_size < 8)

  432.         return 0; /* continue */

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

  434.         url_fskip(pb, atom_size - 4);

  435.         return 0;

  436.     }

  437.     type = get_le32(pb);

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

  439.         url_fskip(pb, atom_size - 8);

  440.         return 0;

  441.     }

  442.     err = parse_mdat(c, pb, type, atom_offset + 8, atom_size - 8);

  443. #ifdef DEBUG

  444.     debug_indent--;

  445. #endif

  446.     return err;

  447. }

  448. 

  449. static int parse_trak(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  450. {

  451.     AVStream *st;

  452.     MOVStreamContext *sc;

  453. 

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

  455. 

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

  457.     if (!st) return -2;

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

  459.     if (!sc) {

  460. 	av_free(st);

  461.         return -1;

  462.     }

  463. 

  464.     sc->sample_to_chunk_index = -1;

  465.     st->priv_data = sc;

  466.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  467.     st->time_length = (c->duration * 1000) / c->time_scale; // time in miliseconds

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

  469.     return parse_default(c, pb, atom_type, atom_offset, atom_size);

  470. }

  471. 

  472. static int parse_tkhd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  473. {

  474.     AVStream *st;

  475. 

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

  477. 

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

  479. 

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

  481. 

  482.     get_byte(pb); get_byte(pb);

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

  484.     /*

  485.     MOV_TRACK_ENABLED 0x0001

  486.     MOV_TRACK_IN_MOVIE 0x0002

  487.     MOV_TRACK_IN_PREVIEW 0x0004

  488.     MOV_TRACK_IN_POSTER 0x0008

  489.     */

  490. 

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

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

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

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

  495.     st->time_length = get_be32(pb) * 1000 / c->time_scale; /* duration */

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

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

  498. 

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

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

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

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

  503. 

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

  505. 

  506.     /* those are fixed-point */

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

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

  509.     

  510.     return 0;

  511. }

  512. 

  513. static int parse_mdhd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  514. {

  515.     AVStream *st;

  516. 

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

  518. 

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

  520. 

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

  522. 

  523.     get_byte(pb); get_byte(pb);

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

  525. 

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

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

  528. 

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

  530. 

  531. #ifdef DEBUG

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

  533. #endif

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

  535. 

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

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

  538. 

  539.     return 0;

  540. }

  541. 

  542. static int parse_hdlr(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  543. {

  544.     int len = 0;

  545.     uint8_t *buf;

  546.     uint32_t type;

  547.     AVStream *st;

  548.     uint32_t ctype;

  549. 

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

  551. 

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

  553. 

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

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

  556. 

  557.     /* component type */

  558.     ctype = get_le32(pb);

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

  560. 

  561. #ifdef DEBUG

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

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

  564. #endif

  565. #ifdef DEBUG

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

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

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

  569.             puts("hdlr: vide");

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

  571.             puts("hdlr: soun");

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

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

  574.             puts("hdlr: vide");

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

  576.             puts("hdlr: soun");

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

  578.             puts("hdlr: odsm");

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

  580.             puts("hdlr: sdsm");

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

  582. #endif

  583. 

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

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

  586.         c->mp4 = 0;

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

  588.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  590.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  593.         c->mp4 = 1;

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

  595.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  597.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  598.     }

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

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

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

  602. 

  603.     if(atom_size <= 24)

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

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

  606.     /* component name */

  607. 

  608.     if(c->mp4) {

  609.         /* .mp4: C string */

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

  611.     } else {

  612.         /* .mov: PASCAL string */

  613.         len = get_byte(pb);

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

  615. 	if (buf) {

  616. 	    get_buffer(pb, buf, len);

  617. #ifdef DEBUG

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

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

  620. #endif

  621. 	    av_free(buf);

  622. 	} else

  623. 	    url_fskip(pb, len);

  624.     }

  625. #if 0

  626.     len = get_byte(pb);

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

  628.     if(len < 32) {

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

  630. 	buf = av_malloc(len+1);

  631. 	if (buf) {

  632. 	    get_buffer(pb, buf, len);

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

  634. #ifdef DEBUG

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

  636. #endif

  637. 	    av_free(buf);

  638. 	} else

  639.             url_fskip(pb, len)l

  640.     } else {

  641.         /* MP4 string */

  642.         for(;;) {

  643.             if (len == 0)

  644.                 break;

  645.             len = get_byte(pb);

  646.         }

  647.     }

  648. #endif

  649. 

  650.     return 0;

  651. }

  652. 

  653. static int mp4_read_descr_len(ByteIOContext *pb)

  654. {

  655.     int len = 0;

  656.     int count = 0;

  657.     for(;;) {

  658.         int c = get_byte(pb);

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

  660.         if ((c & 0x80) == 0)

  661.             break;

  662.         if (++count == 4)

  663.             break;

  664.     }

  665.     return len;

  666. }

  667. 

  668. static int mp4_read_descr(ByteIOContext *pb, int *tag)

  669. {

  670.     int len;

  671.     *tag = get_byte(pb);

  672.     len = mp4_read_descr_len(pb);

  673. #ifdef DEBUG

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

  675. #endif

  676.     return len;

  677. }

  678. 

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

  680. {

  681.     unsigned int val;

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

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

  684.     val |= get_byte(s);

  685.     return val;

  686. }

  687. 

  688. static int parse_esds(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  689. {

  690. 

  691.     int64_t start_pos = url_ftell(pb);

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

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

  694.     int tag, len;

  695. 

  696.     print_atom("esds", atom_type, atom_offset, atom_size);

  697. 

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

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

  700.     len = mp4_read_descr(pb, &tag);

  701.     if (tag == MP4ESDescrTag) {

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

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

  704.     } else

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

  706. 

  707.     len = mp4_read_descr(pb, &tag);

  708.     if (tag == MP4DecConfigDescrTag) {

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

  710. 	sc->esds.stream_type = get_be24(pb);

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

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

  713. 

  714. 	len = mp4_read_descr(pb, &tag);

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

  716. 	if (tag == MP4DecSpecificDescrTag) {

  717. #ifdef DEBUG

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

  719. #endif

  720. 	    sc->header_data = (uint8_t*) av_mallocz(len);

  721. 	    if (sc->header_data) {

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

  723. 		sc->header_len = len;

  724. 	    }

  725. 	}

  726.     }

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

  728.     url_fskip(pb, (atom_size - 8) - ((url_ftell(pb) - start_pos)));

  729.     return 0;

  730. }

  731. 

  732. static int parse_stsd(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  733. {

  734.     int entries, size, frames_per_sample;

  735.     uint32_t format;

  736.     AVStream *st;

  737.     MOVStreamContext *sc;

  738. 

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

  740. 

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

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

  743. 

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

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

  746. 

  747.     entries = get_be32(pb);

  748. 

  749.     while(entries--) {

  750.         enum CodecID id;

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

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

  753. 

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

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

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

  757. 

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

  759.         id = codec_get_id(mov_video_tags, format);

  760.         if (id >= 0) {

  761.             AVCodec *codec;

  762. 	    codec = avcodec_find_decoder(id);

  763.             if (codec)

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

  765.         }

  766. #ifdef DEBUG

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

  768.                size,

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

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

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

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

  773.                st->codec.codec_type);

  774. #endif

  775. 	st->codec.codec_tag = format;

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

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

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

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

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

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

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

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

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

  785. #if 1

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

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

  788.                    we ignore this info */

  789.                 st->codec.width = 0;

  790.                 st->codec.height = 0;

  791.             }

  792. #endif

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

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

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

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

  797. #ifdef DEBUG

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

  799. #endif

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

  801. 

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

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

  804. 

  805.             st->codec.frame_rate      = 25;

  806.             st->codec.frame_rate_base = 1;

  807. 

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

  809. #if 0

  810. 	    while (size >= 8) {

  811.                 int atom_size, atom_type;

  812.                 int64_t start_pos;

  813. 

  814.                 atom_size = get_be32(pb);

  815.                 atom_type = get_le32(pb);

  816. 		size -= 8;

  817.                 printf("NEWSIZE %d\n", size);

  818. #ifdef DEBUG

  819.                 printf("VIDEO: atom_type=%c%c%c%c atom_size=%d size_left=%d\n",

  820.                        (atom_type >> 0) & 0xff,

  821.                        (atom_type >> 8) & 0xff,

  822.                        (atom_type >> 16) & 0xff,

  823.                        (atom_type >> 24) & 0xff,

  824.                        atom_size, size);

  825. #endif

  826.                 start_pos = url_ftell(pb);

  827. 

  828.                 switch(atom_type) {

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

  830.                     {

  831.                         int tag, len;

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

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

  834.                         len = mp4_read_descr(pb, &tag);

  835.                         if (tag == 0x03) {

  836.                             /* MP4ESDescrTag */

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

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

  839.                             len = mp4_read_descr(pb, &tag);

  840.                             if (tag != 0x04)

  841.                                 goto fail;

  842.                             /* MP4DecConfigDescrTag */

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

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

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

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

  847.                             len = mp4_read_descr(pb, &tag);

  848.                             if (tag != 0x05)

  849.                                 goto fail;

  850.                             /* MP4DecSpecificDescrTag */

  851. #ifdef DEBUG

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

  853. #endif

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

  855.                             if (sc->header_data) {

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

  857. 				sc->header_len = len;

  858.                             }

  859.                         }

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

  861.                     }

  862.                     break;

  863.                 default:

  864.                     break;

  865.                 }

  866. 	    fail:

  867.                 printf("ATOMENEWSIZE %d   %d\n", atom_size, url_ftell(pb) - start_pos);

  868. 		if (atom_size > 8) {

  869. 		    url_fskip(pb, (atom_size - 8) -

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

  871. 		    size -= atom_size - 8;

  872. 		    printf("NEWSIZE %d\n", size);

  873. 		}

  874. 	    }

  875.             if (size > 0) {

  876.                 /* unknown extension */

  877.                 url_fskip(pb, size);

  878.             }

  879. #else

  880. 	    parse_default(c, pb, 0L, 0LL, size);

  881. #endif

  882. 	} else {

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

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

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

  886. 

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

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

  889. 

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

  891.             /* handle specific s8 codec */

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

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

  894. 

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

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

  897. 

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

  899. 	    case CODEC_ID_PCM_S16BE:

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

  901. 		    st->codec.codec_id = CODEC_ID_PCM_S8;

  902.                 /* fall */

  903. 	    case CODEC_ID_PCM_U8:

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

  905. 		break;

  906. 	    default:

  907.                 ;

  908. 	    }

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

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

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

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

  913. 

  914. 	    //if (size > 16) url_fskip(pb, size-(16+20));

  915. #if 1

  916. 	    if (size >= 44 + 8) {

  917.                 int fcc;

  918. 		st->codec.extradata_size = get_be32(pb) - 8;

  919. 		fcc = get_le32(pb); // evaw

  920. 		//printf("%x  %.4s  %d\n", fcc, (char*)&fcc, st->codec.extradata_size);

  921. 		st->codec.extradata = av_mallocz(st->codec.extradata_size);

  922.                 if (st->codec.extradata)

  923. 		    get_buffer(pb, st->codec.extradata, st->codec.extradata_size); // FIXME url_fskip

  924. 		url_fskip(pb, size-(16 + 20 + 16 + 8 + st->codec.extradata_size));

  925. 	    }

  926.             else

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

  928. #else

  929. 	    parse_default(c, pb, 0L, 0LL, size - (16 + 20 + 16 + 8));

  930. #endif

  931.         }

  932.     }

  933. /*

  934.     if(len) {

  935.     buf = av_malloc(len+1);

  936.         get_buffer(pb, buf, len);

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

  938.         puts(buf);

  939.         av_free(buf);

  940.     }

  941. */

  942.     return 0;

  943. }

  944. 

  945. static int parse_stco(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  946. {

  947.     int entries, i;

  948.     AVStream *st;

  949.     MOVStreamContext *sc;

  950. 

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

  952. 

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

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

  955. 

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

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

  958. 

  959.     entries = get_be32(pb);

  960.     sc->chunk_count = entries;

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

  962.     if (!sc->chunk_offsets)

  963.         return -1;

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

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

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

  967.         }

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

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

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

  971.         }

  972.     } else

  973.         return -1;

  974. #ifdef DEBUG

  975. /*

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

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

  978.     }

  979. */

  980. #endif

  981.     return 0;

  982. }

  983. 

  984. static int parse_stsc(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  985. {

  986.     int entries, i;

  987.     AVStream *st;

  988.     MOVStreamContext *sc;

  989. 

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

  991. 

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

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

  994. 

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

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

  997. 

  998.     entries = get_be32(pb);

  999. #ifdef DEBUG

  1000. printf("track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1001. #endif

  1002.     sc->sample_to_chunk_sz = entries;

  1003.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1004.     if (!sc->sample_to_chunk)

  1005.         return -1;

  1006.     for(i=0; i<entries; i++) {

  1007.         sc->sample_to_chunk[i].first = get_be32(pb);

  1008.         sc->sample_to_chunk[i].count = get_be32(pb);

  1009.         sc->sample_to_chunk[i].id = get_be32(pb);

  1010. #ifdef DEBUG

  1011. /*        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); */

  1012. #endif

  1013.     }

  1014.     return 0;

  1015. }

  1016. 

  1017. static int parse_stsz(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  1018. {

  1019.     int entries, i;

  1020.     AVStream *st;

  1021.     MOVStreamContext *sc;

  1022. 

  1023.     print_atom("stsz", atom_type, atom_offset, atom_size);

  1024. 

  1025.     st = c->fc->streams[c->fc->nb_streams-1];

  1026.     sc = (MOVStreamContext *)st->priv_data;

  1027. 

  1028.     get_byte(pb); /* version */

  1029.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1030. 

  1031.     sc->sample_size = get_be32(pb);

  1032.     entries = get_be32(pb);

  1033.     sc->sample_count = entries;

  1034. #ifdef DEBUG

  1035.     printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1036. #endif

  1037.     if(sc->sample_size)

  1038.         return 0; /* there isn't any table following */

  1039.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1040.     if (!sc->sample_sizes)

  1041.         return -1;

  1042.     for(i=0; i<entries; i++) {

  1043.         sc->sample_sizes[i] = get_be32(pb);

  1044. #ifdef DEBUG

  1045. /*        printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  1046. #endif

  1047.     }

  1048.     return 0;

  1049. }

  1050. 

  1051. static int parse_stts(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  1052. {

  1053.     int entries, i;

  1054.     AVStream *st;

  1055.     MOVStreamContext *sc;

  1056. 

  1057.     print_atom("stts", atom_type, atom_offset, atom_size);

  1058. 

  1059.     st = c->fc->streams[c->fc->nb_streams-1];

  1060.     sc = (MOVStreamContext *)st->priv_data;

  1061. 

  1062.     get_byte(pb); /* version */

  1063.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1064.     entries = get_be32(pb);

  1065. #ifdef DEBUG

  1066. printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1067. #endif

  1068.     for(i=0; i<entries; i++) {

  1069.         int sample_duration;

  1070. 

  1071.         get_be32(pb);

  1072.         sample_duration = get_be32(pb);

  1073. 

  1074.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1075.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1076.             st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1077. #ifdef DEBUG

  1078.             printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1079. #endif

  1080.         }

  1081.     }

  1082.     return 0;

  1083. }

  1084. 

  1085. #ifdef CONFIG_ZLIB

  1086. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1087. {

  1088.     return -1;

  1089. }

  1090. 

  1091. static int parse_cmov(MOVContext *c, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size)

  1092. {

  1093.     ByteIOContext ctx;

  1094.     uint8_t *cmov_data;

  1095.     uint8_t *moov_data; /* uncompressed data */

  1096.     long cmov_len, moov_len;

  1097.     int ret;

  1098. 

  1099.     print_atom("cmov", atom_type, atom_offset, atom_size);

  1100. 

  1101.     get_be32(pb); /* dcom atom */

  1102.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1103.         return -1;

  1104.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1105.         puts("unknown compression for cmov atom !");

  1106.         return -1;

  1107.     }

  1108.     get_be32(pb); /* cmvd atom */

  1109.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1110.         return -1;

  1111.     moov_len = get_be32(pb); /* uncompressed size */

  1112.     cmov_len = atom_size - 6 * 4;

  1113. 

  1114.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1115.     if (!cmov_data)

  1116.         return -1;

  1117.     moov_data = (uint8_t *) av_malloc(moov_len);

  1118.     if (!moov_data) {

  1119.         av_free(cmov_data);

  1120.         return -1;

  1121.     }

  1122.     get_buffer(pb, cmov_data, cmov_len);

  1123.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1124.         return -1;

  1125.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1126.         return -1;

  1127.     ctx.buf_end = ctx.buffer + moov_len;

  1128.     ret = parse_default(c, &ctx, MKTAG( 'm', 'o', 'o', 'v' ), 0, moov_len);

  1129.     av_free(moov_data);

  1130.     av_free(cmov_data);

  1131.     return ret;

  1132. }

  1133. #endif

  1134. 

  1135. static const MOVParseTableEntry mov_default_parse_table[] = {

  1136. /* mp4 atoms */

  1137. { MKTAG( 'm', 'p', '4', 'a' ), parse_default },

  1138. { MKTAG( 'c', 'o', '6', '4' ), parse_stco },

  1139. { MKTAG( 's', 't', 'c', 'o' ), parse_stco },

  1140. { MKTAG( 'c', 'r', 'h', 'd' ), parse_default },

  1141. { MKTAG( 'c', 't', 't', 's' ), parse_leaf },

  1142. { MKTAG( 'c', 'p', 'r', 't' ), parse_default },

  1143. { MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },

  1144. { MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },

  1145. { MKTAG( 'd', 'i', 'n', 'f' ), parse_default },

  1146. { MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },

  1147. { MKTAG( 's', 't', 'd', 'p' ), parse_default },

  1148. { MKTAG( 'e', 'd', 't', 's' ), parse_default },

  1149. { MKTAG( 'e', 'l', 's', 't' ), parse_leaf },

  1150. { MKTAG( 'u', 'u', 'i', 'd' ), parse_default },

  1151. { MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },

  1152. { MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },

  1153. { MKTAG( 'h', 'm', 'h', 'd' ), parse_leaf },

  1154. { MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },

  1155. { MKTAG( 'n', 'm', 'h', 'd' ), parse_leaf },

  1156. { MKTAG( 'm', 'p', '4', 's' ), parse_default },

  1157. { MKTAG( 'm', 'd', 'i', 'a' ), parse_default },

  1158. { MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },

  1159. { MKTAG( 'm', 'd', 'h', 'd' ), parse_mdhd },

  1160. { MKTAG( 'm', 'i', 'n', 'f' ), parse_default },

  1161. { MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },

  1162. { MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },

  1163. { MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },

  1164. { MKTAG( 'o', 'd', 'h', 'd' ), parse_default },

  1165. { MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },

  1166. { MKTAG( 's', 't', 's', 'd' ), parse_stsd },

  1167. { MKTAG( 's', 't', 's', 'z' ), parse_stsz },

  1168. { MKTAG( 's', 't', 'b', 'l' ), parse_default },

  1169. { MKTAG( 's', 't', 's', 'c' ), parse_stsc },

  1170. { MKTAG( 's', 'd', 'h', 'd' ), parse_default },

  1171. { MKTAG( 's', 't', 's', 'h' ), parse_default },

  1172. { MKTAG( 's', 'k', 'i', 'p' ), parse_default },

  1173. { MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },

  1174. { MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },

  1175. { MKTAG( 's', 't', 's', 's' ), parse_leaf },

  1176. { MKTAG( 's', 't', 't', 's' ), parse_stts },

  1177. { MKTAG( 't', 'r', 'a', 'k' ), parse_trak },

  1178. { MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },

  1179. { MKTAG( 't', 'r', 'e', 'f' ), parse_default }, /* not really */

  1180. { MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },

  1181. { MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },

  1182. { MKTAG( 'm', 'p', '4', 'v' ), parse_default },

  1183. /* extra mp4 */

  1184. { MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },

  1185. /* QT atoms */

  1186. { MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },

  1187. { MKTAG( 'c', 'l', 'i', 'p' ), parse_default },

  1188. { MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },

  1189. { MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },

  1190. { MKTAG( 'm', 'a', 't', 't' ), parse_default },

  1191. { MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },

  1192. { MKTAG( 'r', 'm', 'd', 'a' ), parse_default },

  1193. { MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },

  1194. //{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },

  1195. { MKTAG( 'r', 'm', 'r', 'a' ), parse_default },

  1196. { MKTAG( 's', 'c', 'p', 't' ), parse_leaf },

  1197. { MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },

  1198. { MKTAG( 's', 's', 'r', 'c' ), parse_leaf },

  1199. { MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },

  1200. { MKTAG( 'w', 'i', 'd', 'e' ), parse_wide }, /* place holder */

  1201. { MKTAG( 'c', 't', 'a', 'b' ), parse_ctab },

  1202. { MKTAG( 'e', 's', 'd', 's' ), parse_esds },

  1203. #ifdef CONFIG_ZLIB

  1204. { MKTAG( 'c', 'm', 'o', 'v' ), parse_cmov },

  1205. #else

  1206. { MKTAG( 'c', 'm', 'o', 'v' ), parse_leaf },

  1207. #endif

  1208. { 0L, parse_leaf }

  1209. };

  1210. 

  1211. static void mov_free_stream_context(MOVStreamContext *sc)

  1212. {

  1213.     if(sc) {

  1214.         av_free(sc->chunk_offsets);

  1215.         av_free(sc->sample_to_chunk);

  1216.         av_free(sc->sample_sizes);

  1217.         av_free(sc->header_data);

  1218.         av_free(sc);

  1219.     }

  1220. }

  1221. 

  1222. static inline uint32_t to_tag(uint8_t *buf)

  1223. {

  1224.     return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);

  1225. }

  1226. 

  1227. static inline uint32_t to_be32(uint8_t *buf)

  1228. {

  1229.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1230. }

  1231. 

  1232. /* XXX: is it sufficient ? */

  1233. static int mov_probe(AVProbeData *p)

  1234. {

  1235.     unsigned int offset;

  1236.     uint32_t tag;

  1237. 

  1238.     /* check file header */

  1239.     if (p->buf_size <= 12)

  1240.         return 0;

  1241.     offset = 0;

  1242.     for(;;) {

  1243.         /* ignore invalid offset */

  1244.         if ((offset + 8) > (unsigned int)p->buf_size)

  1245.             return 0;

  1246.         tag = to_tag(p->buf + offset + 4);

  1247.         switch(tag) {

  1248.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1249.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1250.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1251.         case MKTAG( 'm', 'd', 'a', 't' ):

  1252.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1253.             return AVPROBE_SCORE_MAX;

  1254.         case MKTAG( 'f', 't', 'y', 'p' ):

  1255.         case MKTAG( 's', 'k', 'i', 'p' ):            

  1256.             offset = to_be32(p->buf) + offset;

  1257.             break;

  1258.         default:

  1259.             /* unrecognized tag */

  1260.             return 0;

  1261.         }

  1262.     }

  1263.     return 0;

  1264. }

  1265. 

  1266. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1267. {

  1268.     MOVContext *mov = (MOVContext *) s->priv_data;

  1269.     ByteIOContext *pb = &s->pb;

  1270.     int i, j, nb, err;

  1271.     int64_t size;

  1272. 

  1273.     mov->fc = s;

  1274.     mov->parse_table = mov_default_parse_table;

  1275. #if 0

  1276.     /* XXX: I think we should auto detect */

  1277.     if(s->iformat->name[1] == 'p')

  1278.         mov->mp4 = 1;

  1279. #endif

  1280.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1281.         size = url_filesize(url_fileno(pb));

  1282.     else

  1283.         size = 0x7FFFFFFFFFFFFFFF;

  1284. 

  1285. #ifdef DEBUG

  1286.     printf("filesz=%Ld\n", size);

  1287. #endif

  1288. 

  1289.     /* check MOV header */

  1290.     err = parse_default(mov, pb, 0L, 0LL, size);

  1291.     if(err<0 || (!mov->found_moov || !mov->found_mdat)) {

  1292.         puts("header not found !!!");

  1293.         exit(1);

  1294.     }

  1295. #ifdef DEBUG

  1296.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1297. #endif

  1298.     /* some cleanup : make sure we are on the mdat atom */

  1299.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1300.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1301. 

  1302.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1303. 

  1304. #ifdef DEBUG

  1305.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1306. #endif

  1307. 

  1308. #ifdef DEBUG

  1309.     printf("streams= %d\n", s->nb_streams);

  1310. #endif

  1311.     mov->total_streams = nb = s->nb_streams;

  1312.     

  1313. #if 1

  1314.     for(i=0; i<s->nb_streams;) {

  1315.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1316.             av_free(s->streams[i]);

  1317.             for(j=i+1; j<s->nb_streams; j++)

  1318.                 s->streams[j-1] = s->streams[j];

  1319.             s->nb_streams--;

  1320.         } else

  1321.             i++;

  1322.     }

  1323.     for(i=0; i<s->nb_streams;i++) {

  1324.         MOVStreamContext *sc;

  1325.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1326.         sc->ffindex = i;

  1327.         sc->is_ff_stream = 1;

  1328.     }

  1329. #endif

  1330. #ifdef DEBUG

  1331.     printf("real streams= %d\n", s->nb_streams);

  1332. #endif

  1333.     return 0;

  1334. }

  1335. 

  1336. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1337. /* XXX:remove useless commented code sometime */

  1338. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1339. {

  1340.     MOVContext *mov = (MOVContext *) s->priv_data;

  1341.     MOVStreamContext *sc;

  1342.     int64_t offset = 0x0FFFFFFFFFFFFFFF;

  1343.     int i;

  1344.     int size;

  1345.     size = 0x0FFFFFFF;

  1346. 

  1347. #ifdef MOV_SPLIT_CHUNKS

  1348.     if (mov->partial) {

  1349. 

  1350.         int idx;

  1351. 

  1352. 	sc = mov->partial;

  1353. 	idx = sc->sample_to_chunk_index;

  1354. 

  1355.         if (idx < 0) return 0;

  1356. 	size = sc->sample_sizes[sc->current_sample];

  1357. 

  1358.         sc->current_sample++;

  1359.         sc->left_in_chunk--;

  1360. 

  1361.         if (sc->left_in_chunk <= 0)

  1362.             mov->partial = 0;

  1363.         offset = mov->next_chunk_offset;

  1364.         /* extract the sample */

  1365. 

  1366.         goto readchunk;

  1367.     }

  1368. #endif

  1369. 

  1370. again:

  1371.     sc = 0;

  1372.     for(i=0; i<mov->total_streams; i++) {

  1373. 	MOVStreamContext *msc = mov->streams[i];

  1374. 	//printf("MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1375.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1376. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1377. 	    sc = msc;

  1378. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1379. 	    //printf("SELETED  %Ld  i:%d\n", offset, i);

  1380.         }

  1381.     }

  1382.     if (!sc || offset==0x0FFFFFFFFFFFFFFF)

  1383. 	return -1;

  1384. 

  1385.     sc->next_chunk++;

  1386. 

  1387.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1388.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1389.         mov->next_chunk_offset = offset;

  1390.     }

  1391. 

  1392. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1393.     if(!sc->is_ff_stream) {

  1394.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1395.         mov->next_chunk_offset = offset;

  1396.         offset = 0x0FFFFFFFFFFFFFFF;

  1397.         goto again;

  1398.     }

  1399. 

  1400.     /* now get the chunk size... */

  1401. 

  1402.     for(i=0; i<mov->total_streams; i++) {

  1403. 	MOVStreamContext *msc = mov->streams[i];

  1404. 	if ((msc->next_chunk < msc->chunk_count)

  1405. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1406. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1407.     }

  1408. #ifdef MOV_SPLIT_CHUNKS

  1409.     /* split chunks into samples */

  1410.     if (sc->sample_size == 0) {

  1411.         int idx = sc->sample_to_chunk_index;

  1412.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1413. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1414.            idx++;

  1415.         sc->sample_to_chunk_index = idx;

  1416.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1417. 	    mov->partial = sc;

  1418.             /* we'll have to get those samples before next chunk */

  1419.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1420.             size = sc->sample_sizes[sc->current_sample];

  1421.         }

  1422. 

  1423.         sc->current_sample++;

  1424.     }

  1425. #endif

  1426. 

  1427. readchunk:

  1428. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1429.     if(size == 0x0FFFFFFF)

  1430.         size = mov->mdat_size + mov->mdat_offset - offset;

  1431.     if(size < 0)

  1432.         return -1;

  1433.     if(size == 0)

  1434.         return -1;

  1435.     url_fseek(&s->pb, offset, SEEK_SET);

  1436. 

  1437.     //printf("READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1438.     if (sc->header_len > 0) {

  1439.         av_new_packet(pkt, size + sc->header_len);

  1440.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1441.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1442.         /* free header */

  1443.         av_freep(&sc->header_data);

  1444.         sc->header_len = 0;

  1445.     } else {

  1446.         av_new_packet(pkt, size);

  1447.         get_buffer(&s->pb, pkt->data, pkt->size);

  1448.     }

  1449.     pkt->stream_index = sc->ffindex;

  1450. 

  1451. #ifdef DEBUG

  1452. /*

  1453.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1454.     for(i=0; i<8; i++)

  1455.         printf("%02x ", pkt->data[i]);

  1456.     for(i=0; i<8; i++)

  1457.         printf("%c ", (pkt->data[i]) & 0x7F);

  1458.     puts("");

  1459. */

  1460. #endif

  1461. 

  1462.     mov->next_chunk_offset = offset + size;

  1463. 

  1464.     return 0;

  1465. }

  1466. 

  1467. static int mov_read_close(AVFormatContext *s)

  1468. {

  1469.     int i;

  1470.     MOVContext *mov = (MOVContext *) s->priv_data;

  1471.     for(i=0; i<mov->total_streams; i++)

  1472.         mov_free_stream_context(mov->streams[i]);

  1473.     for(i=0; i<s->nb_streams; i++)

  1474. 	av_freep(&s->streams[i]);

  1475.     return 0;

  1476. }

  1477. 

  1478. static AVInputFormat mov_iformat = {

  1479.     "mov",

  1480.     "QuickTime/MPEG4 format",

  1481.     sizeof(MOVContext),

  1482.     mov_probe,

  1483.     mov_read_header,

  1484.     mov_read_packet,

  1485.     mov_read_close,

  1486. };

  1487. 

  1488. int mov_init(void)

  1489. {

  1490.     av_register_input_format(&mov_iformat);

  1491.     return 0;

  1492. }