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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. }

  81. #endif

  82. 

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

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

  85. /* getting rid of these */

  86. #define CODEC_TYPE_MOV_OTHER 2

  87. 

  88. static const CodecTag mov_video_tags[] = {

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

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

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

  92. /* Graphics */

  93. /* Animation */

  94. /* Apple video */

  95. /* Kodak Photo CD */

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

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

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

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

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

  101. /* Sorenson video */

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

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

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

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

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

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

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

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

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

  111.     { 0, 0 }, 

  112. };

  113. 

  114. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  125. 

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

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

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

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

  130. /* MP4 tags */

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

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

  133.     { 0, 0 }, 

  134. };

  135. 

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

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

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

  139.  */

  140. 

  141. typedef struct MOV_sample_to_chunk_tbl {

  142.     long first;

  143.     long count;

  144.     long id;

  145. } MOV_sample_to_chunk_tbl;

  146. 

  147. typedef struct MOVStreamContext {

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

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

  150.     long next_chunk;

  151.     long chunk_count;

  152.     int64_t *chunk_offsets;

  153.     long sample_to_chunk_sz;

  154.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  155.     long sample_to_chunk_index;

  156.     long sample_size;

  157.     long sample_count;

  158.     long *sample_sizes;

  159.     long time_scale;

  160.     long current_sample;

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

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

  163.     int header_len;

  164.     uint8_t *header_data;

  165. } MOVStreamContext;

  166. 

  167. typedef struct MOVContext {

  168.     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) */

  169.     AVFormatContext *fc;

  170.     long time_scale;

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

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

  173.     int64_t mdat_size;

  174.     int64_t mdat_offset;

  175.     int total_streams;

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

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

  178.      */

  179.     MOVStreamContext *streams[MAX_STREAMS];

  180.     

  181.     int64_t next_chunk_offset;

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

  183. } MOVContext;

  184. 

  185. 

  186. struct MOVParseTableEntry;

  187. 

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

  189. 

  190. /* those functions parse an atom */

  191. /* return code:

  192.  1: found what I wanted, exit

  193.  0: continue to parse next atom

  194.  -1: error occured, exit

  195.  */

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

  197.                                   ByteIOContext *pb,

  198.                                   uint32_t atom_type,

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

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

  201.                                   void *param);

  202. 

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

  204. typedef struct MOVParseTableEntry {

  205.     uint32_t type;

  206.     mov_parse_function func;

  207. } MOVParseTableEntry;

  208. 

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

  210. {

  211. #ifdef DEBUG

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

  213. #endif

  214.     if(atom_size>1)

  215.         url_fskip(pb, atom_size);

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

  217.     return 0;

  218. }

  219. 

  220. 

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

  222. {

  223.     uint32_t type, foo=0;

  224.     uint64_t offset, size;

  225.     uint64_t total_size = 0;

  226.     int i;

  227.     int err = 0;

  228.     foo=0;

  229. #ifdef DEBUG

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

  231.     debug_indent++;

  232. #endif

  233.     

  234.     offset = atom_offset;

  235. 

  236.     if(atom_size < 0)

  237.         atom_size = 0x0FFFFFFFFFFFFFFF;

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

  239.         size=atom_size;

  240.         type=0L;

  241.         if(atom_size >= 8) {

  242.             size = get_be32(pb);

  243.             type = get_le32(pb);

  244.         }

  245.         total_size += 8;

  246.         offset+=8;

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

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

  249.             size = get_be64(pb);

  250.             offset+=8;

  251.             total_size+=8;

  252.             size-=8;

  253.         }

  254.         if(size == 0)

  255.             size = atom_size - total_size;

  256.         size-=8;

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

  258.         

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

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

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

  262. #ifdef DEBUG

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

  264. #endif

  265.             url_fskip(pb, size);

  266.         } else

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

  268. 

  269.         offset+=size;

  270.         total_size+=size;

  271.     }

  272. 

  273. #ifdef DEBUG

  274.     debug_indent--;

  275. #endif

  276.     return err;

  277. }

  278. 

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

  280. {

  281.     MOVContext *c;

  282. #ifdef DEBUG

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

  284. #endif

  285.     c = (MOVContext *)param;

  286. 

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

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

  289. 

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

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

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

  293. #ifdef DEBUG

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

  295. #endif

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

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

  298.     

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

  300. 

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

  302. 

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

  304. 

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

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

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

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

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

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

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

  312.     

  313.     return 0;

  314. }

  315. 

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

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

  318. {

  319.     int err;

  320.     MOVContext *c;

  321. #ifdef DEBUG

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

  323. #endif

  324.     c = (MOVContext *)param;

  325. 

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

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

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

  329.     c->found_moov=1;

  330.     if(c->found_mdat)

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

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

  333. }

  334. 

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

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

  337. {

  338.     MOVContext *c;

  339. #ifdef DEBUG

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

  341. #endif

  342.     c = (MOVContext *)param;

  343. 

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

  345.         return 0;

  346.     c->found_mdat=1;

  347.     c->mdat_offset = atom_offset;

  348.     c->mdat_size = atom_size;

  349.     if(c->found_moov)

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

  351.     url_fskip(pb, atom_size);

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

  353. }

  354. 

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

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

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

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

  359. {

  360.     int err;

  361.     uint32_t type;

  362. #ifdef DEBUG

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

  364.     debug_indent++;

  365. #endif

  366.     if (atom_size < 8)

  367.         return 0; /* continue */

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

  369.         url_fskip(pb, atom_size - 4);

  370.         return 0;

  371.     }

  372.     type = get_le32(pb);

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

  374.         url_fskip(pb, atom_size - 8);

  375.         return 0;

  376.     }

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

  378. #ifdef DEBUG

  379.     debug_indent--;

  380. #endif

  381.     return err;

  382. }

  383. 

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

  385. {

  386.     MOVContext *c;

  387.     AVStream *st;

  388.     MOVStreamContext *sc;

  389. #ifdef DEBUG

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

  391. #endif

  392. 

  393.     c = (MOVContext *)param;

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

  395.     if (!st) return -2;

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

  397.     sc->sample_to_chunk_index = -1;

  398.     st->priv_data = sc;

  399.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

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

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

  402. }

  403. 

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

  405. {

  406.     MOVContext *c;

  407.     AVStream *st;

  408. #ifdef DEBUG

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

  410. #endif

  411. 

  412.     c = (MOVContext *)param;

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

  414.     

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

  416. 

  417.     get_byte(pb); get_byte(pb);

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

  419.     /*

  420.     MOV_TRACK_ENABLED 0x0001

  421.     MOV_TRACK_IN_MOVIE 0x0002

  422.     MOV_TRACK_IN_PREVIEW 0x0004

  423.     MOV_TRACK_IN_POSTER 0x0008

  424.     */

  425. 

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

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

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

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

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

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

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

  433.     

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

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

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

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

  438. 

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

  440. 

  441.     /* those are fixed-point */

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

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

  444.     

  445.     return 0;

  446. }

  447. 

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

  449. {

  450.     MOVContext *c;

  451.     AVStream *st;

  452. #ifdef DEBUG

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

  454. #endif

  455. 

  456.     c = (MOVContext *)param;

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

  458.     

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

  460. 

  461.     get_byte(pb); get_byte(pb);

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

  463. 

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

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

  466. 

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

  468. 

  469. #ifdef DEBUG

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

  471. #endif

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

  473. 

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

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

  476.     

  477.     return 0;

  478. }

  479. 

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

  481. {

  482.     MOVContext *c;

  483.     int len = 0;

  484.     char *buf;

  485.     uint32_t type;

  486.     AVStream *st;

  487.     uint32_t ctype;

  488. #ifdef DEBUG

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

  490. #endif

  491.     c = (MOVContext *)param;

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

  493. 

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

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

  496. 

  497.     /* component type */

  498.     ctype = get_le32(pb);

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

  500. 

  501. #ifdef DEBUG

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

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

  504. #endif

  505. #ifdef DEBUG

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

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

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

  509.             puts("hdlr: vide");

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

  511.             puts("hdlr: soun");

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

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

  514.             puts("hdlr: vide");

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

  516.             puts("hdlr: soun");

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

  518.             puts("hdlr: odsm");

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

  520.             puts("hdlr: sdsm");

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

  522. #endif

  523. 

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

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

  526.         c->mp4 = 0;

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

  528.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  530.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  533.         c->mp4 = 1;

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

  535.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  537.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  538.     }

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

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

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

  542. 

  543.     if(atom_size <= 24)

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

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

  546.     /* component name */

  547. 

  548.     if(c->mp4) {

  549.         /* .mp4: C string */

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

  551.     } else {

  552.         /* .mov: PASCAL string */

  553.         len = get_byte(pb);

  554.         buf = av_malloc(len+1);

  555.         get_buffer(pb, buf, len);

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

  557. #ifdef DEBUG

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

  559. #endif

  560.         av_free(buf);

  561.     }

  562. #if 0

  563.     len = get_byte(pb);

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

  565.     if(len < 32) {

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

  567.         buf = av_malloc(len+1);

  568.         get_buffer(pb, buf, len);

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

  570. #ifdef DEBUG

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

  572. #endif

  573.         av_free(buf);

  574.     } else {

  575.         /* MP4 string */

  576.         for(;;) {

  577.             if (len == 0)

  578.                 break;

  579.             len = get_byte(pb);

  580.         }

  581.     }

  582. #endif

  583.     

  584.     return 0;

  585. }

  586. 

  587. static int mp4_read_descr_len(ByteIOContext *pb)

  588. {

  589.     int c, len, count;

  590. 

  591.     len = 0;

  592.     count = 0;

  593.     for(;;) {

  594.         c = get_byte(pb);

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

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

  597.             break;

  598.         if (++count == 4)

  599.             break;

  600.     }

  601.     return len;

  602. }

  603. 

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

  605. {

  606.     int len;

  607.     *tag = get_byte(pb);

  608.     len = mp4_read_descr_len(pb);

  609. #ifdef DEBUG

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

  611. #endif

  612.     return len;

  613. }

  614. 

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

  616. {

  617.     MOVContext *c;

  618.     int entries, size, samp_sz, frames_per_sample, id;

  619.     uint32_t format;

  620.     AVStream *st;

  621.     MOVStreamContext *sc;

  622. #ifdef DEBUG

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

  624. #endif

  625.     c = (MOVContext *)param;

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

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

  628. 

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

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

  631. 

  632.     entries = get_be32(pb);

  633. 

  634.     while(entries--) {

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

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

  637.         

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

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

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

  641. 

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

  643.         id = codec_get_id(mov_video_tags, format);

  644.         if (id >= 0) {

  645.             AVCodec *codec;

  646.             codec = avcodec_find_decoder(id);

  647.             if (codec)

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

  649.         }

  650. #ifdef DEBUG

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

  652.                size, 

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

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

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

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

  657.                st->codec.codec_type);

  658. #endif

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

  660.             st->codec.codec_tag = format;

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

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

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

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

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

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

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

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

  669. #if 1

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

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

  672.                    we ignore this info */

  673.                 st->codec.width = 0;

  674.                 st->codec.height = 0;

  675.             }

  676. #endif

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

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

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

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

  681. #ifdef DEBUG

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

  683. #endif

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

  685. 

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

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

  688.             

  689.             st->codec.frame_rate      = 25;

  690.             st->codec.frame_rate_base = 1;

  691.             

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

  693.             while (size >= 8) {

  694.                 int atom_size, atom_type;

  695.                 int64_t start_pos;

  696.                 

  697.                 atom_size = get_be32(pb);

  698.                 atom_type = get_le32(pb);

  699.                 size -= 8;

  700. #ifdef DEBUG

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

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

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

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

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

  706.                        atom_size, size);

  707. #endif

  708.                 start_pos = url_ftell(pb);

  709. 

  710.                 switch(atom_type) {

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

  712.                     {

  713.                         int tag, len;

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

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

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

  717.                         if (tag == 0x03) {

  718.                             /* MP4ESDescrTag */

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

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

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

  722.                             if (tag != 0x04)

  723.                                 goto fail;

  724.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  730.                             if (tag != 0x05)

  731.                                 goto fail;

  732.                             /* MP4DecSpecificDescrTag */

  733. #ifdef DEBUG

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

  735. #endif

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

  737.                             if (sc->header_data) {

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

  739.                                 sc->header_len = len;

  740.                             }

  741.                         }

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

  743.                     }

  744.                     break;

  745.                 default:

  746.                     break;

  747.                 }

  748.             fail:

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

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

  751.                 size -= atom_size - 8;

  752.             }

  753.             if (size > 0) {

  754.                 /* unknown extension */

  755.                 url_fskip(pb, size);

  756.             }

  757.         } else {

  758.             st->codec.codec_tag = format;

  759. 

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

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

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

  763. 

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

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

  766. #ifdef DEBUG

  767.             if(samp_sz != 16)

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

  769. #endif            

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

  771.             /* handle specific s8 codec */

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

  773.             st->codec.codec_id = CODEC_ID_PCM_S8;

  774. 

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

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

  777.             

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

  779.             st->codec.bit_rate = 0;

  780. #if 0

  781. 

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

  783.             get_be16(pb); /*  */

  784.             get_be16(pb); /*  */

  785.             get_be16(pb); /*  */

  786.             get_be16(pb); /*  */

  787. #endif            

  788.             if(size > 16)

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

  790.         }

  791.     }

  792. /*

  793.     if(len) {

  794.     buf = av_malloc(len+1);

  795.         get_buffer(pb, buf, len);

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

  797.         puts(buf);

  798.         av_free(buf);

  799.     }

  800. */

  801.     return 0;

  802. }

  803. 

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

  805. {

  806.     MOVContext *c;

  807.     int entries, i;

  808.     AVStream *st;

  809.     MOVStreamContext *sc;

  810. #ifdef DEBUG

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

  812. #endif

  813.     c = (MOVContext *)param;

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

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

  816.     

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

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

  819. 

  820.     entries = get_be32(pb);

  821.     sc->chunk_count = entries;

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

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

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

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

  826.         }

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

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

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

  830.         }

  831.     } else

  832.         return -1;

  833. #ifdef DEBUG

  834. /*

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

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

  837.     }

  838. */

  839. #endif

  840.     return 0;

  841. }

  842. 

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

  844. {

  845.     MOVContext *c;

  846.     int entries, i;

  847.     AVStream *st;

  848.     MOVStreamContext *sc;

  849. #ifdef DEBUG

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

  851. #endif

  852.     c = (MOVContext *)param;

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

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

  855.     

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

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

  858. 

  859.     entries = get_be32(pb);

  860. #ifdef DEBUG

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

  862. #endif

  863.     sc->sample_to_chunk_sz = entries;

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

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

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

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

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

  869. #ifdef DEBUG

  870. /*        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); */

  871. #endif

  872.     }

  873.     return 0;

  874. }

  875. 

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

  877. {

  878.     MOVContext *c;

  879.     int entries, i;

  880.     AVStream *st;

  881.     MOVStreamContext *sc;

  882. #ifdef DEBUG

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

  884. #endif

  885.     c = (MOVContext *)param;

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

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

  888.     

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

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

  891.     

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

  893.     entries = get_be32(pb);

  894.     sc->sample_count = entries;

  895. #ifdef DEBUG

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

  897. #endif

  898.     if(sc->sample_size)

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

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

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

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

  903. #ifdef DEBUG

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

  905. #endif

  906.     }

  907.     return 0;

  908. }

  909. 

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

  911. {

  912.     MOVContext *c;

  913.     int entries, i;

  914.     AVStream *st;

  915.     MOVStreamContext *sc;

  916. #ifdef DEBUG

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

  918. #endif

  919.     c = (MOVContext *)param;

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

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

  922. 

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

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

  925.     entries = get_be32(pb);

  926. #ifdef DEBUG

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

  928. #endif

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

  930.         int sample_duration;

  931. 

  932.         get_be32(pb);

  933.         sample_duration = get_be32(pb);

  934. 

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

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

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

  938. #ifdef DEBUG

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

  940. #endif

  941.         }

  942.     }

  943.     return 0;

  944. }

  945. 

  946. #ifdef CONFIG_ZLIB

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

  948. {

  949.     return -1;

  950. }

  951. 

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

  953. {

  954.     MOVContext *c;

  955.     ByteIOContext ctx;

  956.     char *cmov_data;

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

  958.     long cmov_len, moov_len;

  959.     int ret;

  960. #ifdef DEBUG

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

  962. #endif

  963.     c = (MOVContext *)param;

  964. 

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

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

  967.         return -1;

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

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

  970.         return -1;

  971.     }

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

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

  974.         return -1;

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

  976.     cmov_len = atom_size - 6 * 4;

  977.     

  978.     cmov_data = av_malloc(cmov_len);

  979.     if (!cmov_data)

  980.         return -1;

  981.     moov_data = av_malloc(moov_len);

  982.     if (!moov_data) {

  983.         av_free(cmov_data);

  984.         return -1;

  985.     }

  986.     get_buffer(pb, cmov_data, cmov_len);

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

  988.         return -1;

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

  990.         return -1;

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

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

  993.     av_free(moov_data);

  994.     av_free(cmov_data);

  995.     return ret;

  996. }

  997. #endif

  998. 

  999. static const MOVParseTableEntry mov_default_parse_table[] = {

  1000. /* mp4 atoms */

  1001. { MKTAG( 'm', 'p', '4', 'a' ), parse_default },

  1002. { MKTAG( 'c', 'o', '6', '4' ), parse_stco },

  1003. { MKTAG( 's', 't', 'c', 'o' ), parse_stco },

  1004. { MKTAG( 'c', 'r', 'h', 'd' ), parse_default },

  1005. { MKTAG( 'c', 't', 't', 's' ), parse_leaf },

  1006. { MKTAG( 'c', 'p', 'r', 't' ), parse_default },

  1007. { MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },

  1008. { MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },

  1009. { MKTAG( 'd', 'i', 'n', 'f' ), parse_default },

  1010. { MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },

  1011. { MKTAG( 's', 't', 'd', 'p' ), parse_default },

  1012. { MKTAG( 'e', 's', 'd', 's' ), parse_default },

  1013. { MKTAG( 'e', 'd', 't', 's' ), parse_default },

  1014. { MKTAG( 'e', 'l', 's', 't' ), parse_leaf },

  1015. { MKTAG( 'u', 'u', 'i', 'd' ), parse_default },

  1016. { MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },

  1017. { MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },

  1018. { MKTAG( 'h', 'm', 'h', 'd' ), parse_leaf },

  1019. { MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },

  1020. { MKTAG( 'n', 'm', 'h', 'd' ), parse_leaf },

  1021. { MKTAG( 'm', 'p', '4', 's' ), parse_default },

  1022. { MKTAG( 'm', 'd', 'i', 'a' ), parse_default },

  1023. { MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },

  1024. { MKTAG( 'm', 'd', 'h', 'd' ), parse_mdhd },

  1025. { MKTAG( 'm', 'i', 'n', 'f' ), parse_default },

  1026. { MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },

  1027. { MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },

  1028. { MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },

  1029. { MKTAG( 'o', 'd', 'h', 'd' ), parse_default },

  1030. { MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },

  1031. { MKTAG( 's', 't', 's', 'd' ), parse_stsd },

  1032. { MKTAG( 's', 't', 's', 'z' ), parse_stsz },

  1033. { MKTAG( 's', 't', 'b', 'l' ), parse_default },

  1034. { MKTAG( 's', 't', 's', 'c' ), parse_stsc },

  1035. { MKTAG( 's', 'd', 'h', 'd' ), parse_default },

  1036. { MKTAG( 's', 't', 's', 'h' ), parse_default },

  1037. { MKTAG( 's', 'k', 'i', 'p' ), parse_default },

  1038. { MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },

  1039. { MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },

  1040. { MKTAG( 's', 't', 's', 's' ), parse_leaf },

  1041. { MKTAG( 's', 't', 't', 's' ), parse_stts },

  1042. { MKTAG( 't', 'r', 'a', 'k' ), parse_trak },

  1043. { MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },

  1044. { MKTAG( 't', 'r', 'e', 'f' ), parse_default }, /* not really */

  1045. { MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },

  1046. { MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },

  1047. { MKTAG( 'm', 'p', '4', 'v' ), parse_default },

  1048. /* extra mp4 */

  1049. { MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },

  1050. /* QT atoms */

  1051. { MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },

  1052. { MKTAG( 'c', 'l', 'i', 'p' ), parse_default },

  1053. { MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },

  1054. { MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },

  1055. { MKTAG( 'm', 'a', 't', 't' ), parse_default },

  1056. { MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },

  1057. { MKTAG( 'r', 'm', 'd', 'a' ), parse_default },

  1058. { MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },

  1059. //{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },

  1060. { MKTAG( 'r', 'm', 'r', 'a' ), parse_default },

  1061. { MKTAG( 's', 'c', 'p', 't' ), parse_leaf },

  1062. { MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },

  1063. { MKTAG( 's', 's', 'r', 'c' ), parse_leaf },

  1064. { MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },

  1065. { MKTAG( 'w', 'i', 'd', 'e' ), parse_wide }, /* place holder */

  1066. #ifdef CONFIG_ZLIB

  1067. { MKTAG( 'c', 'm', 'o', 'v' ), parse_cmov },

  1068. #else

  1069. { MKTAG( 'c', 'm', 'o', 'v' ), parse_leaf },

  1070. #endif

  1071. { 0L, parse_leaf }

  1072. };

  1073. 

  1074. static void mov_free_stream_context(MOVStreamContext *sc)

  1075. {

  1076.     if(sc) {

  1077.         av_free(sc->chunk_offsets);

  1078.         av_free(sc->sample_to_chunk);

  1079.         av_free(sc->header_data);

  1080.         av_free(sc);

  1081.     }

  1082. }

  1083. 

  1084. static uint32_t to_tag(uint8_t *buf)

  1085. {

  1086.     return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);

  1087. }

  1088. 

  1089. static uint32_t to_be32(uint8_t *buf)

  1090. {

  1091.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1092. }

  1093. 

  1094. /* XXX: is it suffisant ? */

  1095. static int mov_probe(AVProbeData *p)

  1096. {

  1097.     unsigned int offset;

  1098.     uint32_t tag;

  1099. 

  1100.     /* check file header */

  1101.     if (p->buf_size <= 12)

  1102.         return 0;

  1103.     offset = 0;

  1104.     for(;;) {

  1105.         /* ignore invalid offset */

  1106.         if ((offset + 8) > (unsigned int)p->buf_size)

  1107.             return 0;

  1108.         tag = to_tag(p->buf + offset + 4);

  1109.         switch(tag) {

  1110.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1111.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1112.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1113.         case MKTAG( 'm', 'd', 'a', 't' ):

  1114.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1115.             return AVPROBE_SCORE_MAX;

  1116.         case MKTAG( 'f', 't', 'y', 'p' ):

  1117.         case MKTAG( 's', 'k', 'i', 'p' ):            

  1118.             offset = to_be32(p->buf) + offset;

  1119.             break;

  1120.         default:

  1121.             /* unrecognized tag */

  1122.             return 0;

  1123.         }

  1124.     }

  1125.     return 0;

  1126. }

  1127. 

  1128. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1129. {

  1130.     MOVContext *mov = s->priv_data;

  1131.     ByteIOContext *pb = &s->pb;

  1132.     int i, j, nb, err;

  1133.     int64_t size;

  1134. 

  1135.     mov->fc = s;

  1136. #if 0

  1137.     /* XXX: I think we should auto detect */

  1138.     if(s->iformat->name[1] == 'p')

  1139.         mov->mp4 = 1;

  1140. #endif

  1141.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1142.         size = url_filesize(url_fileno(pb));

  1143.     else

  1144.         size = 0x7FFFFFFFFFFFFFFF;

  1145. 

  1146. #ifdef DEBUG

  1147.     printf("filesz=%Ld\n", size);

  1148. #endif

  1149. 

  1150.     /* check MOV header */

  1151.     err = parse_default(mov_default_parse_table, pb, 0L, 0LL, size, mov);

  1152.     if(err<0 || (!mov->found_moov || !mov->found_mdat)) {

  1153.         puts("header not found !!!");

  1154.         exit(1);

  1155.     }

  1156. #ifdef DEBUG

  1157.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1158. #endif

  1159.     /* some cleanup : make sure we are on the mdat atom */

  1160.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1161.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1162. 

  1163.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1164. 

  1165. #ifdef DEBUG

  1166.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1167. #endif

  1168. 

  1169. #ifdef DEBUG

  1170.     printf("streams= %d\n", s->nb_streams);

  1171. #endif

  1172.     mov->total_streams = nb = s->nb_streams;

  1173.     

  1174. #if 1

  1175.     for(i=0; i<s->nb_streams;) {

  1176.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1177.             av_free(s->streams[i]);

  1178.             for(j=i+1; j<s->nb_streams; j++)

  1179.                 s->streams[j-1] = s->streams[j];

  1180.             s->nb_streams--;

  1181.         } else

  1182.             i++;

  1183.     }

  1184.     for(i=0; i<s->nb_streams;i++) {

  1185.         MOVStreamContext *sc;

  1186.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1187.         sc->ffindex = i;

  1188.         sc->is_ff_stream = 1;

  1189.     }

  1190. #endif

  1191. #ifdef DEBUG

  1192.     printf("real streams= %d\n", s->nb_streams);

  1193. #endif

  1194.     return 0;

  1195. }

  1196. 

  1197. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1198. /* XXX:remove useless commented code sometime */

  1199. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1200. {

  1201.     MOVContext *mov = s->priv_data;

  1202.     MOVStreamContext *sc;

  1203.     int64_t offset = 0x0FFFFFFFFFFFFFFF;

  1204.     int i;

  1205.     int st_id = 0, size;

  1206.     size = 0x0FFFFFFF;

  1207.     

  1208. #ifdef MOV_SPLIT_CHUNKS

  1209.     if (mov->partial) {

  1210.         

  1211.         int idx;

  1212. 

  1213.         st_id = mov->partial - 1;

  1214.         idx = mov->streams[st_id]->sample_to_chunk_index;

  1215.         if (idx < 0) return 0;

  1216.         size = mov->streams[st_id]->sample_sizes[mov->streams[st_id]->current_sample];

  1217. 

  1218.         mov->streams[st_id]->current_sample++;

  1219.         mov->streams[st_id]->left_in_chunk--;

  1220. 

  1221.         if(mov->streams[st_id]->left_in_chunk <= 0)

  1222.             mov->partial = 0;

  1223.         offset = mov->next_chunk_offset;

  1224.         /* extract the sample */

  1225. 

  1226.         goto readchunk;

  1227.     }

  1228. #endif

  1229. 

  1230. again:

  1231.     for(i=0; i<mov->total_streams; i++) {

  1232.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  1233.         && (mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] < offset)) {

  1234.             st_id = i;

  1235.             offset = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk];

  1236.         }

  1237.     }

  1238.     mov->streams[st_id]->next_chunk++;

  1239.     if(offset==0x0FFFFFFFFFFFFFFF)

  1240.         return -1;

  1241.     

  1242.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1243.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1244.         mov->next_chunk_offset = offset;

  1245.     }

  1246. 

  1247. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1248.     if(!mov->streams[st_id]->is_ff_stream) {

  1249.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1250.         mov->next_chunk_offset = offset;

  1251.         offset = 0x0FFFFFFFFFFFFFFF;

  1252.         goto again;

  1253.     }

  1254. 

  1255.     /* now get the chunk size... */

  1256. 

  1257.     for(i=0; i<mov->total_streams; i++) {

  1258.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  1259.         && ((mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset) < size)) {

  1260.             size = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset;

  1261.         }

  1262.     }

  1263. #ifdef MOV_SPLIT_CHUNKS

  1264.     /* split chunks into samples */

  1265.     if(mov->streams[st_id]->sample_size == 0) {

  1266.         int idx;

  1267.         idx = mov->streams[st_id]->sample_to_chunk_index;

  1268.         if ((idx + 1 < mov->streams[st_id]->sample_to_chunk_sz)

  1269.                && (mov->streams[st_id]->next_chunk >= mov->streams[st_id]->sample_to_chunk[idx + 1].first))

  1270.            idx++; 

  1271.         mov->streams[st_id]->sample_to_chunk_index = idx;

  1272.         if(idx >= 0 && mov->streams[st_id]->sample_to_chunk[idx].count != 1) {

  1273.             mov->partial = st_id+1;

  1274.             /* we'll have to get those samples before next chunk */

  1275.             mov->streams[st_id]->left_in_chunk = (mov->streams[st_id]->sample_to_chunk[idx].count) - 1;

  1276.             size = mov->streams[st_id]->sample_sizes[mov->streams[st_id]->current_sample];

  1277.         }

  1278. 

  1279.         mov->streams[st_id]->current_sample++;

  1280.     }

  1281. #endif

  1282. 

  1283. readchunk:

  1284. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1285.     if(size == 0x0FFFFFFF)

  1286.         size = mov->mdat_size + mov->mdat_offset - offset;

  1287.     if(size < 0)

  1288.         return -1;

  1289.     if(size == 0)

  1290.         return -1;

  1291.     url_fseek(&s->pb, offset, SEEK_SET);

  1292.     sc = mov->streams[st_id];

  1293.     if (sc->header_len > 0) {

  1294.         av_new_packet(pkt, size + sc->header_len);

  1295.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1296.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1297.         /* free header */

  1298.         av_freep(&sc->header_data);

  1299.         sc->header_len = 0;

  1300.     } else {

  1301.         av_new_packet(pkt, size);

  1302.         get_buffer(&s->pb, pkt->data, pkt->size);

  1303.     }

  1304.     pkt->stream_index = sc->ffindex;

  1305. 

  1306. #ifdef DEBUG

  1307. /*

  1308.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1309.     for(i=0; i<8; i++)

  1310.         printf("%02x ", pkt->data[i]);

  1311.     for(i=0; i<8; i++)

  1312.         printf("%c ", (pkt->data[i]) & 0x7F);

  1313.     puts("");

  1314. */

  1315. #endif

  1316. 

  1317.     mov->next_chunk_offset = offset + size;

  1318. 

  1319.     return 0;

  1320. }

  1321. 

  1322. static int mov_read_close(AVFormatContext *s)

  1323. {

  1324.     int i;

  1325.     MOVContext *mov = s->priv_data;

  1326.     for(i=0; i<mov->total_streams; i++)

  1327.         mov_free_stream_context(mov->streams[i]);

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

  1329. 	av_freep(&s->streams[i]);

  1330.     return 0;

  1331. }

  1332. 

  1333. static AVInputFormat mov_iformat = {

  1334.     "mov",

  1335.     "QuickTime/MPEG4 format",

  1336.     sizeof(MOVContext),

  1337.     mov_probe,

  1338.     mov_read_header,

  1339.     mov_read_packet,

  1340.     mov_read_close,

  1341. };

  1342. 

  1343. int mov_init(void)

  1344. {

  1345.     av_register_input_format(&mov_iformat);

  1346.     return 0;

  1347. }