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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. #endif

  83. 

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

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

  86. /* getting rid of these */

  87. #define CODEC_TYPE_MOV_OTHER 2

  88. 

  89. static const CodecTag mov_video_tags[] = {

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

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

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

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

  94. /* Graphics */

  95. /* Animation */

  96. /* Apple video */

  97. /* Kodak Photo CD */

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

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

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

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

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

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

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

  105. /* Sorenson video */

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

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

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

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

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

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

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

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

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

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

  116.     { 0, 0 },

  117. };

  118. 

  119. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  130. 

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

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

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

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

  135. /* MP4 tags */

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

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

  138.     { 0, 0 }, 

  139. };

  140. 

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

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

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

  144.  */

  145. 

  146. typedef struct MOV_sample_to_chunk_tbl {

  147.     long first;

  148.     long count;

  149.     long id;

  150. } MOV_sample_to_chunk_tbl;

  151. 

  152. typedef struct {

  153.     uint8_t  version;

  154.     uint32_t flags; // 24bit

  155. 

  156.     /* 0x03 ESDescrTag */

  157.     uint16_t es_id;

  158. #define MP4ODescrTag			0x01

  159. #define MP4IODescrTag			0x02

  160. #define MP4ESDescrTag			0x03

  161. #define MP4DecConfigDescrTag		0x04

  162. #define MP4DecSpecificDescrTag		0x05

  163. #define MP4SLConfigDescrTag		0x06

  164. #define MP4ContentIdDescrTag		0x07

  165. #define MP4SupplContentIdDescrTag	0x08

  166. #define MP4IPIPtrDescrTag		0x09

  167. #define MP4IPMPPtrDescrTag		0x0A

  168. #define MP4IPMPDescrTag			0x0B

  169. #define MP4RegistrationDescrTag		0x0D

  170. #define MP4ESIDIncDescrTag		0x0E

  171. #define MP4ESIDRefDescrTag		0x0F

  172. #define MP4FileIODescrTag		0x10

  173. #define MP4FileODescrTag		0x11

  174. #define MP4ExtProfileLevelDescrTag	0x13

  175. #define MP4ExtDescrTagsStart		0x80

  176. #define MP4ExtDescrTagsEnd		0xFE

  177.     uint8_t  stream_priority;

  178. 

  179.     /* 0x04 DecConfigDescrTag */

  180.     uint8_t  object_type_id;

  181.     uint8_t  stream_type;

  182.     /* XXX: really streamType is

  183.      * only 6bit, followed by:

  184.      * 1bit  upStream

  185.      * 1bit  reserved

  186.      */

  187.     uint32_t buffer_size_db; // 24

  188.     uint32_t max_bitrate;

  189.     uint32_t avg_bitrate;

  190. 

  191.     /* 0x05 DecSpecificDescrTag */

  192.     uint8_t  decoder_cfg_len;

  193.     uint8_t *decoder_cfg;

  194. 

  195.     /* 0x06 SLConfigDescrTag */

  196.     uint8_t  sl_config_len;

  197.     uint8_t *sl_config;

  198. } MOV_esds_t;

  199. 

  200. typedef struct MOVStreamContext {

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

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

  203.     long next_chunk;

  204.     long chunk_count;

  205.     int64_t *chunk_offsets;

  206.     long sample_to_chunk_sz;

  207.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  208.     long sample_to_chunk_index;

  209.     long sample_size;

  210.     long sample_count;

  211.     long *sample_sizes;

  212.     int time_scale;

  213.     long current_sample;

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

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

  216.     int header_len;

  217.     MOV_esds_t esds;

  218.     uint8_t *header_data;

  219. } MOVStreamContext;

  220. 

  221. typedef struct MOVContext {

  222.     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) */

  223.     AVFormatContext *fc;

  224.     int time_scale;

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

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

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

  228.     int64_t mdat_size;

  229.     int64_t mdat_offset;

  230.     int total_streams;

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

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

  233.      */

  234.     MOVStreamContext *streams[MAX_STREAMS];

  235. 

  236.     int64_t next_chunk_offset;

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

  238. } MOVContext;

  239. 

  240. 

  241. struct MOVParseTableEntry;

  242. 

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

  244. 

  245. /* those functions parse an atom */

  246. /* return code:

  247.  1: found what I wanted, exit

  248.  0: continue to parse next atom

  249.  -1: error occured, exit

  250.  */

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

  252.                                   ByteIOContext *pb,

  253.                                   uint32_t atom_type,

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

  255.                                   int64_t atom_size, /* total size (excluding the size and type fields) */

  256.                                   void *param);

  257. 

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

  259. typedef struct MOVParseTableEntry {

  260.     uint32_t type;

  261.     mov_parse_function func;

  262. } MOVParseTableEntry;

  263. static const MOVParseTableEntry mov_default_parse_table[];

  264. 

  265. static int parse_leaf(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  266. {

  267. #ifdef DEBUG

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

  269. #endif

  270.     if(atom_size>1)

  271.         url_fskip(pb, atom_size);

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

  273.     return 0;

  274. }

  275. 

  276. 

  277. static int parse_default(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  278. {

  279.     uint32_t type, foo=0;

  280.     uint64_t offset, size;

  281.     uint64_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; parse_table[i].type != 0L && parse_table[i].type != type; i++)

  315. 	    /* empty */;

  316. 

  317.         size -= 8;

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

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

  327. 

  328.         offset+=size;

  329.         total_size+=size;

  330.     }

  331. 

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

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

  334.         url_fskip(pb, atom_size - total_size);

  335.     }

  336. 

  337. #ifdef DEBUG

  338.     debug_indent--;

  339. #endif

  340.     return err;

  341. }

  342. 

  343. static int parse_ctab(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  344. {

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

  346.     return 0;

  347. }

  348. 

  349. static int parse_mvhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  350. {

  351.     MOVContext *c;

  352. #ifdef DEBUG

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

  354. #endif

  355.     c = (MOVContext *)param;

  356. 

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

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

  359. 

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

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

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

  363. #ifdef DEBUG

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

  365. #endif

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

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

  368. 

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

  370. 

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

  372. 

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

  374. 

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

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

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

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

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

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

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

  382.     

  383.     return 0;

  384. }

  385. 

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

  387. static int parse_moov(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  388. {

  389.     int err;

  390.     MOVContext *c;

  391. #ifdef DEBUG

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

  393. #endif

  394.     c = (MOVContext *)param;

  395. 

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

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

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

  399.     c->found_moov=1;

  400.     if(c->found_mdat)

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

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

  403. }

  404. 

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

  406. static int parse_mdat(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  407. {

  408.     MOVContext *c;

  409. #ifdef DEBUG

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

  411. #endif

  412.     c = (MOVContext *)param;

  413. 

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

  415.         return 0;

  416.     c->found_mdat=1;

  417.     c->mdat_offset = atom_offset;

  418.     c->mdat_size = atom_size;

  419.     if(c->found_moov)

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

  421.     url_fskip(pb, atom_size);

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

  423. }

  424. 

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

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

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

  428. static int parse_wide(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  429. {

  430.     int err;

  431.     uint32_t type;

  432. #ifdef DEBUG

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

  434.     debug_indent++;

  435. #endif

  436.     if (atom_size < 8)

  437.         return 0; /* continue */

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

  439.         url_fskip(pb, atom_size - 4);

  440.         return 0;

  441.     }

  442.     type = get_le32(pb);

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

  444.         url_fskip(pb, atom_size - 8);

  445.         return 0;

  446.     }

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

  448. #ifdef DEBUG

  449.     debug_indent--;

  450. #endif

  451.     return err;

  452. }

  453. 

  454. static int parse_trak(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  455. {

  456.     MOVContext *c;

  457.     AVStream *st;

  458.     MOVStreamContext *sc;

  459. #ifdef DEBUG

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

  461. #endif

  462. 

  463.     c = (MOVContext *)param;

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

  465.     if (!st) return -2;

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

  467.     memset(sc, 0, sizeof(MOVStreamContext));

  468.     sc->sample_to_chunk_index = -1;

  469.     st->priv_data = sc;

  470.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

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

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

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

  474. }

  475. 

  476. static int parse_tkhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  477. {

  478.     MOVContext *c;

  479.     AVStream *st;

  480. #ifdef DEBUG

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

  482. #endif

  483. 

  484.     c = (MOVContext *)param;

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

  486. 

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

  488. 

  489.     get_byte(pb); get_byte(pb);

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

  491.     /*

  492.     MOV_TRACK_ENABLED 0x0001

  493.     MOV_TRACK_IN_MOVIE 0x0002

  494.     MOV_TRACK_IN_PREVIEW 0x0004

  495.     MOV_TRACK_IN_POSTER 0x0008

  496.     */

  497. 

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

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

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

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

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

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

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

  505. 

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

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

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

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

  510. 

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

  512. 

  513.     /* those are fixed-point */

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

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

  516.     

  517.     return 0;

  518. }

  519. 

  520. static int parse_mdhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  521. {

  522.     MOVContext *c;

  523.     AVStream *st;

  524. #ifdef DEBUG

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

  526. #endif

  527. 

  528.     c = (MOVContext *)param;

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

  530. 

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

  532. 

  533.     get_byte(pb); get_byte(pb);

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

  535. 

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

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

  538. 

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

  540. 

  541. #ifdef DEBUG

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

  543. #endif

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

  545. 

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

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

  548. 

  549.     return 0;

  550. }

  551. 

  552. static int parse_hdlr(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  553. {

  554.     MOVContext *c;

  555.     int len = 0;

  556.     char *buf;

  557.     uint32_t type;

  558.     AVStream *st;

  559.     uint32_t ctype;

  560. #ifdef DEBUG

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

  562. #endif

  563.     c = (MOVContext *)param;

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

  565. 

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

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

  568. 

  569.     /* component type */

  570.     ctype = get_le32(pb);

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

  572. 

  573. #ifdef DEBUG

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

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

  576. #endif

  577. #ifdef DEBUG

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

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

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

  581.             puts("hdlr: vide");

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

  583.             puts("hdlr: soun");

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

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

  586.             puts("hdlr: vide");

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

  588.             puts("hdlr: soun");

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

  590.             puts("hdlr: odsm");

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

  592.             puts("hdlr: sdsm");

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

  594. #endif

  595. 

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

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

  598.         c->mp4 = 0;

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

  600.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  602.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  605.         c->mp4 = 1;

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

  607.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  609.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  610.     }

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

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

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

  614. 

  615.     if(atom_size <= 24)

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

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

  618.     /* component name */

  619. 

  620.     if(c->mp4) {

  621.         /* .mp4: C string */

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

  623.     } else {

  624.         /* .mov: PASCAL string */

  625.         len = get_byte(pb);

  626.         buf = av_malloc(len+1);

  627.         get_buffer(pb, buf, len);

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

  629. #ifdef DEBUG

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

  631. #endif

  632.         av_free(buf);

  633.     }

  634. #if 0

  635.     len = get_byte(pb);

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

  637.     if(len < 32) {

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

  639.         buf = av_malloc(len+1);

  640.         get_buffer(pb, buf, len);

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

  642. #ifdef DEBUG

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

  644. #endif

  645.         av_free(buf);

  646.     } else {

  647.         /* MP4 string */

  648.         for(;;) {

  649.             if (len == 0)

  650.                 break;

  651.             len = get_byte(pb);

  652.         }

  653.     }

  654. #endif

  655. 

  656.     return 0;

  657. }

  658. 

  659. static int mp4_read_descr_len(ByteIOContext *pb)

  660. {

  661.     int len = 0;

  662.     int count = 0;

  663.     for(;;) {

  664.         int c = get_byte(pb);

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

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

  667.             break;

  668.         if (++count == 4)

  669.             break;

  670.     }

  671.     return len;

  672. }

  673. 

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

  675. {

  676.     int len;

  677.     *tag = get_byte(pb);

  678.     len = mp4_read_descr_len(pb);

  679. #ifdef DEBUG

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

  681. #endif

  682.     return len;

  683. }

  684. 

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

  686. {

  687.     unsigned int val;

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

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

  690.     val |= get_byte(s);

  691.     return val;

  692. }

  693. 

  694. static int parse_esds(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  695. {

  696. 

  697.     int64_t start_pos = url_ftell(pb);

  698.     MOVContext *c = (MOVContext *)param;

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

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

  701.     int tag, len;

  702. #ifdef DEBUG

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

  704. #endif

  705. 

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

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

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

  709.     if (tag == MP4ESDescrTag) {

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

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

  712.     } else

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

  714. 

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

  716.     if (tag == MP4DecConfigDescrTag) {

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

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

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

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

  721. 

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

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

  724. 	if (tag == MP4DecSpecificDescrTag) {

  725. #ifdef DEBUG

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

  727. #endif

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

  729. 	    if (sc->header_data) {

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

  731. 		sc->header_len = len;

  732. 	    }

  733. 	}

  734.     }

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

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

  737.     return 0;

  738. }

  739. 

  740. static int parse_stsd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  741. {

  742.     MOVContext *c;

  743.     int entries, size, frames_per_sample, id;

  744.     uint32_t format;

  745.     AVStream *st;

  746.     MOVStreamContext *sc;

  747. #ifdef DEBUG

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

  749. #endif

  750.     c = (MOVContext *)param;

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

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

  753. 

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

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

  756. 

  757.     entries = get_be32(pb);

  758. 

  759.     while(entries--) {

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

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

  762. 

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

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

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

  766. 

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

  768.         id = codec_get_id(mov_video_tags, format);

  769.         if (id >= 0) {

  770.             AVCodec *codec;

  771.             codec = avcodec_find_decoder(id);

  772.             if (codec)

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

  774.         }

  775. #ifdef DEBUG

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

  777.                size,

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

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

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

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

  782.                st->codec.codec_type);

  783. #endif

  784. 	st->codec.codec_tag = format;

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

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

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

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

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

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

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

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

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

  794. #if 1

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

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

  797.                    we ignore this info */

  798.                 st->codec.width = 0;

  799.                 st->codec.height = 0;

  800.             }

  801. #endif

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

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

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

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

  806. #ifdef DEBUG

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

  808. #endif

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

  810. 

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

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

  813. 

  814.             st->codec.frame_rate      = 25;

  815.             st->codec.frame_rate_base = 1;

  816. 

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

  818. #if 0

  819. 	    while (size >= 8) {

  820.                 int atom_size, atom_type;

  821.                 int64_t start_pos;

  822. 

  823.                 atom_size = get_be32(pb);

  824.                 atom_type = get_le32(pb);

  825. 		size -= 8;

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

  827. #ifdef DEBUG

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

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

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

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

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

  833.                        atom_size, size);

  834. #endif

  835.                 start_pos = url_ftell(pb);

  836. 

  837.                 switch(atom_type) {

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

  839.                     {

  840.                         int tag, len;

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

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

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

  844.                         if (tag == 0x03) {

  845.                             /* MP4ESDescrTag */

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

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

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

  849.                             if (tag != 0x04)

  850.                                 goto fail;

  851.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  857.                             if (tag != 0x05)

  858.                                 goto fail;

  859.                             /* MP4DecSpecificDescrTag */

  860. #ifdef DEBUG

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

  862. #endif

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

  864.                             if (sc->header_data) {

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

  866. 				sc->header_len = len;

  867.                             }

  868.                         }

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

  870.                     }

  871.                     break;

  872.                 default:

  873.                     break;

  874.                 }

  875. 	    fail:

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

  877. 		if (atom_size > 8) {

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

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

  880. 		    size -= atom_size - 8;

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

  882. 		}

  883. 	    }

  884.             if (size > 0) {

  885.                 /* unknown extension */

  886.                 url_fskip(pb, size);

  887.             }

  888. #else

  889. 	    parse_default(mov_default_parse_table, pb, 0L, 0LL, size, param);

  890. #endif

  891. 	} else {

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

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

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

  895. 

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

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

  898. 

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

  900.             /* handle specific s8 codec */

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

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

  903. 

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

  905. 

  906. 	    if (st->codec.codec_id == CODEC_ID_PCM_S16BE) {

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

  908. 		    st->codec.codec_id = CODEC_ID_PCM_S8;

  909.                 st->codec.bit_rate = st->codec.sample_rate;

  910. 	    }

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

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

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

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

  915. 

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

  917. #if 1

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

  919.                 int fcc;

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

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

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

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

  924.                 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);

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

  926. 	    }

  927.             else

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

  929. #else

  930. 	    parse_default(mov_default_parse_table, pb, 0L, 0LL, size - (16 + 20 + 16 + 8), param);

  931. #endif

  932.         }

  933.     }

  934. /*

  935.     if(len) {

  936.     buf = av_malloc(len+1);

  937.         get_buffer(pb, buf, len);

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

  939.         puts(buf);

  940.         av_free(buf);

  941.     }

  942. */

  943.     return 0;

  944. }

  945. 

  946. static int parse_stco(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  947. {

  948.     MOVContext *c;

  949.     int entries, i;

  950.     AVStream *st;

  951.     MOVStreamContext *sc;

  952. #ifdef DEBUG

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

  954. #endif

  955.     c = (MOVContext *)param;

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

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

  958. 

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

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

  961. 

  962.     entries = get_be32(pb);

  963.     sc->chunk_count = entries;

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

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

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

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

  968.         }

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

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

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

  972.         }

  973.     } else

  974.         return -1;

  975. #ifdef DEBUG

  976. /*

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

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

  979.     }

  980. */

  981. #endif

  982.     return 0;

  983. }

  984. 

  985. static int parse_stsc(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  986. {

  987.     MOVContext *c;

  988.     int entries, i;

  989.     AVStream *st;

  990.     MOVStreamContext *sc;

  991. #ifdef DEBUG

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

  993. #endif

  994.     c = (MOVContext *)param;

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

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

  997. 

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

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

  1000. 

  1001.     entries = get_be32(pb);

  1002. #ifdef DEBUG

  1003. printf("track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1004. #endif

  1005.     sc->sample_to_chunk_sz = entries;

  1006.     sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1007.     for(i=0; i<entries; i++) {

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

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

  1010.         sc->sample_to_chunk[i].id = get_be32(pb);

  1011. #ifdef DEBUG

  1012. /*        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); */

  1013. #endif

  1014.     }

  1015.     return 0;

  1016. }

  1017. 

  1018. static int parse_stsz(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  1019. {

  1020.     MOVContext *c;

  1021.     int entries, i;

  1022.     AVStream *st;

  1023.     MOVStreamContext *sc;

  1024. #ifdef DEBUG

  1025.     print_atom("stsz", atom_type, atom_offset, atom_size);

  1026. #endif

  1027.     c = (MOVContext *)param;

  1028.     st = c->fc->streams[c->fc->nb_streams-1];

  1029.     sc = (MOVStreamContext *)st->priv_data;

  1030. 

  1031.     get_byte(pb); /* version */

  1032.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1033. 

  1034.     sc->sample_size = get_be32(pb);

  1035.     entries = get_be32(pb);

  1036.     sc->sample_count = entries;

  1037. #ifdef DEBUG

  1038.     printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1039. #endif

  1040.     if(sc->sample_size)

  1041.         return 0; /* there isn't any table following */

  1042.     sc->sample_sizes = av_malloc(entries * sizeof(long));

  1043.     for(i=0; i<entries; i++) {

  1044.         sc->sample_sizes[i] = get_be32(pb);

  1045. #ifdef DEBUG

  1046. /*        printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  1047. #endif

  1048.     }

  1049.     return 0;

  1050. }

  1051. 

  1052. static int parse_stts(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  1053. {

  1054.     MOVContext *c;

  1055.     int entries, i;

  1056.     AVStream *st;

  1057.     MOVStreamContext *sc;

  1058. #ifdef DEBUG

  1059.     print_atom("stts", atom_type, atom_offset, atom_size);

  1060. #endif

  1061.     c = (MOVContext *)param;

  1062.     st = c->fc->streams[c->fc->nb_streams-1];

  1063.     sc = (MOVStreamContext *)st->priv_data;

  1064. 

  1065.     get_byte(pb); /* version */

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

  1067.     entries = get_be32(pb);

  1068. #ifdef DEBUG

  1069. printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1070. #endif

  1071.     for(i=0; i<entries; i++) {

  1072.         int sample_duration;

  1073. 

  1074.         get_be32(pb);

  1075.         sample_duration = get_be32(pb);

  1076. 

  1077.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1078.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1079.             st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1080. #ifdef DEBUG

  1081.             printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1082. #endif

  1083.         }

  1084.     }

  1085.     return 0;

  1086. }

  1087. 

  1088. #ifdef CONFIG_ZLIB

  1089. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1090. {

  1091.     return -1;

  1092. }

  1093. 

  1094. static int parse_cmov(const MOVParseTableEntry *parse_table, ByteIOContext *pb, uint32_t atom_type, int64_t atom_offset, int64_t atom_size, void *param)

  1095. {

  1096.     MOVContext *c;

  1097.     ByteIOContext ctx;

  1098.     char *cmov_data;

  1099.     unsigned char *moov_data; /* uncompressed data */

  1100.     long cmov_len, moov_len;

  1101.     int ret;

  1102. #ifdef DEBUG

  1103.     print_atom("cmov", atom_type, atom_offset, atom_size);

  1104. #endif

  1105.     c = (MOVContext *)param;

  1106. 

  1107.     get_be32(pb); /* dcom atom */

  1108.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1109.         return -1;

  1110.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1111.         puts("unknown compression for cmov atom !");

  1112.         return -1;

  1113.     }

  1114.     get_be32(pb); /* cmvd atom */

  1115.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1116.         return -1;

  1117.     moov_len = get_be32(pb); /* uncompressed size */

  1118.     cmov_len = atom_size - 6 * 4;

  1119. 

  1120.     cmov_data = av_malloc(cmov_len);

  1121.     if (!cmov_data)

  1122.         return -1;

  1123.     moov_data = av_malloc(moov_len);

  1124.     if (!moov_data) {

  1125.         av_free(cmov_data);

  1126.         return -1;

  1127.     }

  1128.     get_buffer(pb, cmov_data, cmov_len);

  1129.     if(uncompress (moov_data, &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1130.         return -1;

  1131.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1132.         return -1;

  1133.     ctx.buf_end = ctx.buffer + moov_len;

  1134.     ret = parse_default(parse_table, &ctx, MKTAG( 'm', 'o', 'o', 'v' ), 0, moov_len, param);

  1135.     av_free(moov_data);

  1136.     av_free(cmov_data);

  1137.     return ret;

  1138. }

  1139. #endif

  1140. 

  1141. static const MOVParseTableEntry mov_default_parse_table[] = {

  1142. /* mp4 atoms */

  1143. { MKTAG( 'm', 'p', '4', 'a' ), parse_default },

  1144. { MKTAG( 'c', 'o', '6', '4' ), parse_stco },

  1145. { MKTAG( 's', 't', 'c', 'o' ), parse_stco },

  1146. { MKTAG( 'c', 'r', 'h', 'd' ), parse_default },

  1147. { MKTAG( 'c', 't', 't', 's' ), parse_leaf },

  1148. { MKTAG( 'c', 'p', 'r', 't' ), parse_default },

  1149. { MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },

  1150. { MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },

  1151. { MKTAG( 'd', 'i', 'n', 'f' ), parse_default },

  1152. { MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },

  1153. { MKTAG( 's', 't', 'd', 'p' ), parse_default },

  1154. { MKTAG( 'e', 'd', 't', 's' ), parse_default },

  1155. { MKTAG( 'e', 'l', 's', 't' ), parse_leaf },

  1156. { MKTAG( 'u', 'u', 'i', 'd' ), parse_default },

  1157. { MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },

  1158. { MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },

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

  1160. { MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },

  1161. { MKTAG( 'n', 'm', 'h', 'd' ), parse_leaf },

  1162. { MKTAG( 'm', 'p', '4', 's' ), parse_default },

  1163. { MKTAG( 'm', 'd', 'i', 'a' ), parse_default },

  1164. { MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },

  1165. { MKTAG( 'm', 'd', 'h', 'd' ), parse_mdhd },

  1166. { MKTAG( 'm', 'i', 'n', 'f' ), parse_default },

  1167. { MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },

  1168. { MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },

  1169. { MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },

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

  1171. { MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },

  1172. { MKTAG( 's', 't', 's', 'd' ), parse_stsd },

  1173. { MKTAG( 's', 't', 's', 'z' ), parse_stsz },

  1174. { MKTAG( 's', 't', 'b', 'l' ), parse_default },

  1175. { MKTAG( 's', 't', 's', 'c' ), parse_stsc },

  1176. { MKTAG( 's', 'd', 'h', 'd' ), parse_default },

  1177. { MKTAG( 's', 't', 's', 'h' ), parse_default },

  1178. { MKTAG( 's', 'k', 'i', 'p' ), parse_default },

  1179. { MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },

  1180. { MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },

  1181. { MKTAG( 's', 't', 's', 's' ), parse_leaf },

  1182. { MKTAG( 's', 't', 't', 's' ), parse_stts },

  1183. { MKTAG( 't', 'r', 'a', 'k' ), parse_trak },

  1184. { MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },

  1185. { MKTAG( 't', 'r', 'e', 'f' ), parse_default }, /* not really */

  1186. { MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },

  1187. { MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },

  1188. { MKTAG( 'm', 'p', '4', 'v' ), parse_default },

  1189. /* extra mp4 */

  1190. { MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },

  1191. /* QT atoms */

  1192. { MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },

  1193. { MKTAG( 'c', 'l', 'i', 'p' ), parse_default },

  1194. { MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },

  1195. { MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },

  1196. { MKTAG( 'm', 'a', 't', 't' ), parse_default },

  1197. { MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },

  1198. { MKTAG( 'r', 'm', 'd', 'a' ), parse_default },

  1199. { MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },

  1200. //{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },

  1201. { MKTAG( 'r', 'm', 'r', 'a' ), parse_default },

  1202. { MKTAG( 's', 'c', 'p', 't' ), parse_leaf },

  1203. { MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },

  1204. { MKTAG( 's', 's', 'r', 'c' ), parse_leaf },

  1205. { MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },

  1206. { MKTAG( 'w', 'i', 'd', 'e' ), parse_wide }, /* place holder */

  1207. { MKTAG( 'c', 't', 'a', 'b' ), parse_ctab },

  1208. { MKTAG( 'e', 's', 'd', 's' ), parse_esds },

  1209. #ifdef CONFIG_ZLIB

  1210. { MKTAG( 'c', 'm', 'o', 'v' ), parse_cmov },

  1211. #else

  1212. { MKTAG( 'c', 'm', 'o', 'v' ), parse_leaf },

  1213. #endif

  1214. { 0L, parse_leaf }

  1215. };

  1216. 

  1217. static void mov_free_stream_context(MOVStreamContext *sc)

  1218. {

  1219.     if(sc) {

  1220.         av_free(sc->chunk_offsets);

  1221.         av_free(sc->sample_to_chunk);

  1222.         av_free(sc->sample_sizes);

  1223.         av_free(sc->header_data);

  1224.         av_free(sc);

  1225.     }

  1226. }

  1227. 

  1228. static inline uint32_t to_tag(uint8_t *buf)

  1229. {

  1230.     return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);

  1231. }

  1232. 

  1233. static inline uint32_t to_be32(uint8_t *buf)

  1234. {

  1235.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1236. }

  1237. 

  1238. /* XXX: is it suffisant ? */

  1239. static int mov_probe(AVProbeData *p)

  1240. {

  1241.     unsigned int offset;

  1242.     uint32_t tag;

  1243. 

  1244.     /* check file header */

  1245.     if (p->buf_size <= 12)

  1246.         return 0;

  1247.     offset = 0;

  1248.     for(;;) {

  1249.         /* ignore invalid offset */

  1250.         if ((offset + 8) > (unsigned int)p->buf_size)

  1251.             return 0;

  1252.         tag = to_tag(p->buf + offset + 4);

  1253.         switch(tag) {

  1254.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1255.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1256.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1257.         case MKTAG( 'm', 'd', 'a', 't' ):

  1258.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1259.             return AVPROBE_SCORE_MAX;

  1260.         case MKTAG( 'f', 't', 'y', 'p' ):

  1261.         case MKTAG( 's', 'k', 'i', 'p' ):            

  1262.             offset = to_be32(p->buf) + offset;

  1263.             break;

  1264.         default:

  1265.             /* unrecognized tag */

  1266.             return 0;

  1267.         }

  1268.     }

  1269.     return 0;

  1270. }

  1271. 

  1272. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1273. {

  1274.     MOVContext *mov = s->priv_data;

  1275.     ByteIOContext *pb = &s->pb;

  1276.     int i, j, nb, err;

  1277.     int64_t size;

  1278. 

  1279.     mov->fc = s;

  1280. #if 0

  1281.     /* XXX: I think we should auto detect */

  1282.     if(s->iformat->name[1] == 'p')

  1283.         mov->mp4 = 1;

  1284. #endif

  1285.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1286.         size = url_filesize(url_fileno(pb));

  1287.     else

  1288.         size = 0x7FFFFFFFFFFFFFFF;

  1289. 

  1290. #ifdef DEBUG

  1291.     printf("filesz=%Ld\n", size);

  1292. #endif

  1293. 

  1294.     /* check MOV header */

  1295.     err = parse_default(mov_default_parse_table, pb, 0L, 0LL, size, mov);

  1296.     if(err<0 || (!mov->found_moov || !mov->found_mdat)) {

  1297.         puts("header not found !!!");

  1298.         exit(1);

  1299.     }

  1300. #ifdef DEBUG

  1301.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1302. #endif

  1303.     /* some cleanup : make sure we are on the mdat atom */

  1304.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1305.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1306. 

  1307.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1308. 

  1309. #ifdef DEBUG

  1310.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1311. #endif

  1312. 

  1313. #ifdef DEBUG

  1314.     printf("streams= %d\n", s->nb_streams);

  1315. #endif

  1316.     mov->total_streams = nb = s->nb_streams;

  1317.     

  1318. #if 1

  1319.     for(i=0; i<s->nb_streams;) {

  1320.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1321.             av_free(s->streams[i]);

  1322.             for(j=i+1; j<s->nb_streams; j++)

  1323.                 s->streams[j-1] = s->streams[j];

  1324.             s->nb_streams--;

  1325.         } else

  1326.             i++;

  1327.     }

  1328.     for(i=0; i<s->nb_streams;i++) {

  1329.         MOVStreamContext *sc;

  1330.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1331.         sc->ffindex = i;

  1332.         sc->is_ff_stream = 1;

  1333.     }

  1334. #endif

  1335. #ifdef DEBUG

  1336.     printf("real streams= %d\n", s->nb_streams);

  1337. #endif

  1338.     return 0;

  1339. }

  1340. 

  1341. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1342. /* XXX:remove useless commented code sometime */

  1343. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1344. {

  1345.     MOVContext *mov = s->priv_data;

  1346.     MOVStreamContext *sc;

  1347.     int64_t offset = 0x0FFFFFFFFFFFFFFF;

  1348.     int i;

  1349.     int size;

  1350.     size = 0x0FFFFFFF;

  1351. 

  1352. #ifdef MOV_SPLIT_CHUNKS

  1353.     if (mov->partial) {

  1354. 

  1355.         int idx;

  1356. 

  1357. 	sc = mov->partial;

  1358. 	idx = sc->sample_to_chunk_index;

  1359. 

  1360.         if (idx < 0) return 0;

  1361. 	size = sc->sample_sizes[sc->current_sample];

  1362. 

  1363.         sc->current_sample++;

  1364.         sc->left_in_chunk--;

  1365. 

  1366.         if (sc->left_in_chunk <= 0)

  1367.             mov->partial = 0;

  1368.         offset = mov->next_chunk_offset;

  1369.         /* extract the sample */

  1370. 

  1371.         goto readchunk;

  1372.     }

  1373. #endif

  1374. 

  1375. again:

  1376.     sc = 0;

  1377.     for(i=0; i<mov->total_streams; i++) {

  1378. 	MOVStreamContext *msc = mov->streams[i];

  1379. 	//printf("MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1380.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1381. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1382. 	    sc = msc;

  1383. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1384. 	    //printf("SELETED  %Ld  i:%d\n", offset, i);

  1385.         }

  1386.     }

  1387.     if (!sc || offset==0x0FFFFFFFFFFFFFFF)

  1388. 	return -1;

  1389. 

  1390.     sc->next_chunk++;

  1391. 

  1392.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1393.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1394.         mov->next_chunk_offset = offset;

  1395.     }

  1396. 

  1397. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1398.     if(!sc->is_ff_stream) {

  1399.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1400.         mov->next_chunk_offset = offset;

  1401.         offset = 0x0FFFFFFFFFFFFFFF;

  1402.         goto again;

  1403.     }

  1404. 

  1405.     /* now get the chunk size... */

  1406. 

  1407.     for(i=0; i<mov->total_streams; i++) {

  1408. 	MOVStreamContext *msc = mov->streams[i];

  1409. 	if ((msc->next_chunk < msc->chunk_count)

  1410. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1411. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1412.     }

  1413. #ifdef MOV_SPLIT_CHUNKS

  1414.     /* split chunks into samples */

  1415.     if (sc->sample_size == 0) {

  1416.         int idx = sc->sample_to_chunk_index;

  1417.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1418. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1419.            idx++;

  1420.         sc->sample_to_chunk_index = idx;

  1421.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1422. 	    mov->partial = sc;

  1423.             /* we'll have to get those samples before next chunk */

  1424.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1425.             size = sc->sample_sizes[sc->current_sample];

  1426.         }

  1427. 

  1428.         sc->current_sample++;

  1429.     }

  1430. #endif

  1431. 

  1432. readchunk:

  1433. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1434.     if(size == 0x0FFFFFFF)

  1435.         size = mov->mdat_size + mov->mdat_offset - offset;

  1436.     if(size < 0)

  1437.         return -1;

  1438.     if(size == 0)

  1439.         return -1;

  1440.     url_fseek(&s->pb, offset, SEEK_SET);

  1441. 

  1442.     //printf("READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1443.     if (sc->header_len > 0) {

  1444.         av_new_packet(pkt, size + sc->header_len);

  1445.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1446.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1447.         /* free header */

  1448.         av_freep(&sc->header_data);

  1449.         sc->header_len = 0;

  1450.     } else {

  1451.         av_new_packet(pkt, size);

  1452.         get_buffer(&s->pb, pkt->data, pkt->size);

  1453.     }

  1454.     pkt->stream_index = sc->ffindex;

  1455. 

  1456. #ifdef DEBUG

  1457. /*

  1458.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1459.     for(i=0; i<8; i++)

  1460.         printf("%02x ", pkt->data[i]);

  1461.     for(i=0; i<8; i++)

  1462.         printf("%c ", (pkt->data[i]) & 0x7F);

  1463.     puts("");

  1464. */

  1465. #endif

  1466. 

  1467.     mov->next_chunk_offset = offset + size;

  1468. 

  1469.     return 0;

  1470. }

  1471. 

  1472. static int mov_read_close(AVFormatContext *s)

  1473. {

  1474.     int i;

  1475.     MOVContext *mov = s->priv_data;

  1476.     for(i=0; i<mov->total_streams; i++)

  1477.         mov_free_stream_context(mov->streams[i]);

  1478.     for(i=0; i<s->nb_streams; i++)

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

  1480.     return 0;

  1481. }

  1482. 

  1483. static AVInputFormat mov_iformat = {

  1484.     "mov",

  1485.     "QuickTime/MPEG4 format",

  1486.     sizeof(MOVContext),

  1487.     mov_probe,

  1488.     mov_read_header,

  1489.     mov_read_packet,

  1490.     mov_read_close,

  1491. };

  1492. 

  1493. int mov_init(void)

  1494. {

  1495.     av_register_input_format(&mov_iformat);

  1496.     return 0;

  1497. }