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

  93. /* Graphics */

  94. /* Animation */

  95. /* Apple video */

  96. /* Kodak Photo CD */

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

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

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

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

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

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

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

  104. /* Sorenson video */

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

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

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

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

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

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

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

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

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

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

  115.     { 0, 0 }, 

  116. };

  117. 

  118. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  129. 

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

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

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

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

  134. /* MP4 tags */

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

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

  137.     { 0, 0 }, 

  138. };

  139. 

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

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

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

  143.  */

  144. 

  145. typedef struct MOV_sample_to_chunk_tbl {

  146.     long first;

  147.     long count;

  148.     long id;

  149. } MOV_sample_to_chunk_tbl;

  150. 

  151. typedef struct MOVStreamContext {

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

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

  154.     long next_chunk;

  155.     long chunk_count;

  156.     int64_t *chunk_offsets;

  157.     long sample_to_chunk_sz;

  158.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  159.     long sample_to_chunk_index;

  160.     long sample_size;

  161.     long sample_count;

  162.     long *sample_sizes;

  163.     long time_scale;

  164.     long current_sample;

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

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

  167.     int header_len;

  168.     uint8_t *header_data;

  169. } MOVStreamContext;

  170. 

  171. typedef struct MOVContext {

  172.     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) */

  173.     AVFormatContext *fc;

  174.     long time_scale;

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

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

  177.     int64_t mdat_size;

  178.     int64_t mdat_offset;

  179.     int total_streams;

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

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

  182.      */

  183.     MOVStreamContext *streams[MAX_STREAMS];

  184.     

  185.     int64_t next_chunk_offset;

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

  187. } MOVContext;

  188. 

  189. 

  190. struct MOVParseTableEntry;

  191. 

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

  193. 

  194. /* those functions parse an atom */

  195. /* return code:

  196.  1: found what I wanted, exit

  197.  0: continue to parse next atom

  198.  -1: error occured, exit

  199.  */

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

  201.                                   ByteIOContext *pb,

  202.                                   uint32_t atom_type,

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

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

  205.                                   void *param);

  206. 

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

  208. typedef struct MOVParseTableEntry {

  209.     uint32_t type;

  210.     mov_parse_function func;

  211. } MOVParseTableEntry;

  212. 

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

  214. {

  215. #ifdef DEBUG

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

  217. #endif

  218.     if(atom_size>1)

  219.         url_fskip(pb, atom_size);

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

  221.     return 0;

  222. }

  223. 

  224. 

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

  226. {

  227.     uint32_t type, foo=0;

  228.     uint64_t offset, size;

  229.     uint64_t total_size = 0;

  230.     int i;

  231.     int err = 0;

  232.     foo=0;

  233. #ifdef DEBUG

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

  235.     debug_indent++;

  236. #endif

  237.     

  238.     offset = atom_offset;

  239. 

  240.     if(atom_size < 0)

  241.         atom_size = 0x0FFFFFFFFFFFFFFF;

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

  243.         size=atom_size;

  244.         type=0L;

  245.         if(atom_size >= 8) {

  246.             size = get_be32(pb);

  247.             type = get_le32(pb);

  248.         }

  249.         total_size += 8;

  250.         offset+=8;

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

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

  253.             size = get_be64(pb);

  254.             offset+=8;

  255.             total_size+=8;

  256.             size-=8;

  257.         }

  258.         if(size == 0)

  259.             size = atom_size - total_size;

  260.         size-=8;

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

  262.         

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

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

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

  266. #ifdef DEBUG

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

  268. #endif

  269.             url_fskip(pb, size);

  270.         } else

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

  272. 

  273.         offset+=size;

  274.         total_size+=size;

  275.     }

  276. 

  277. #ifdef DEBUG

  278.     debug_indent--;

  279. #endif

  280.     return err;

  281. }

  282. 

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

  284. {

  285.     MOVContext *c;

  286. #ifdef DEBUG

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

  288. #endif

  289.     c = (MOVContext *)param;

  290. 

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

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

  293. 

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

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

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

  297. #ifdef DEBUG

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

  299. #endif

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

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

  302.     

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

  304. 

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

  306. 

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

  308. 

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

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

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

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

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

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

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

  316.     

  317.     return 0;

  318. }

  319. 

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

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

  322. {

  323.     int err;

  324.     MOVContext *c;

  325. #ifdef DEBUG

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

  327. #endif

  328.     c = (MOVContext *)param;

  329. 

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

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

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

  333.     c->found_moov=1;

  334.     if(c->found_mdat)

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

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

  337. }

  338. 

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

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

  341. {

  342.     MOVContext *c;

  343. #ifdef DEBUG

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

  345. #endif

  346.     c = (MOVContext *)param;

  347. 

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

  349.         return 0;

  350.     c->found_mdat=1;

  351.     c->mdat_offset = atom_offset;

  352.     c->mdat_size = atom_size;

  353.     if(c->found_moov)

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

  355.     url_fskip(pb, atom_size);

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

  357. }

  358. 

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

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

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

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

  363. {

  364.     int err;

  365.     uint32_t type;

  366. #ifdef DEBUG

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

  368.     debug_indent++;

  369. #endif

  370.     if (atom_size < 8)

  371.         return 0; /* continue */

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

  373.         url_fskip(pb, atom_size - 4);

  374.         return 0;

  375.     }

  376.     type = get_le32(pb);

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

  378.         url_fskip(pb, atom_size - 8);

  379.         return 0;

  380.     }

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

  382. #ifdef DEBUG

  383.     debug_indent--;

  384. #endif

  385.     return err;

  386. }

  387. 

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

  389. {

  390.     MOVContext *c;

  391.     AVStream *st;

  392.     MOVStreamContext *sc;

  393. #ifdef DEBUG

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

  395. #endif

  396. 

  397.     c = (MOVContext *)param;

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

  399.     if (!st) return -2;

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

  401.     sc->sample_to_chunk_index = -1;

  402.     st->priv_data = sc;

  403.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

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

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

  406. }

  407. 

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

  409. {

  410.     MOVContext *c;

  411.     AVStream *st;

  412. #ifdef DEBUG

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

  414. #endif

  415. 

  416.     c = (MOVContext *)param;

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

  418.     

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

  420. 

  421.     get_byte(pb); get_byte(pb);

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

  423.     /*

  424.     MOV_TRACK_ENABLED 0x0001

  425.     MOV_TRACK_IN_MOVIE 0x0002

  426.     MOV_TRACK_IN_PREVIEW 0x0004

  427.     MOV_TRACK_IN_POSTER 0x0008

  428.     */

  429. 

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

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

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

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

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

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

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

  437.     

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

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

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

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

  442. 

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

  444. 

  445.     /* those are fixed-point */

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

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

  448.     

  449.     return 0;

  450. }

  451. 

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

  453. {

  454.     MOVContext *c;

  455.     AVStream *st;

  456. #ifdef DEBUG

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

  458. #endif

  459. 

  460.     c = (MOVContext *)param;

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

  462.     

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

  464. 

  465.     get_byte(pb); get_byte(pb);

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

  467. 

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

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

  470. 

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

  472. 

  473. #ifdef DEBUG

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

  475. #endif

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

  477. 

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

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

  480.     

  481.     return 0;

  482. }

  483. 

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

  485. {

  486.     MOVContext *c;

  487.     int len = 0;

  488.     char *buf;

  489.     uint32_t type;

  490.     AVStream *st;

  491.     uint32_t ctype;

  492. #ifdef DEBUG

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

  494. #endif

  495.     c = (MOVContext *)param;

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

  497. 

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

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

  500. 

  501.     /* component type */

  502.     ctype = get_le32(pb);

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

  504. 

  505. #ifdef DEBUG

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

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

  508. #endif

  509. #ifdef DEBUG

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

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

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

  513.             puts("hdlr: vide");

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

  515.             puts("hdlr: soun");

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

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

  518.             puts("hdlr: vide");

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

  520.             puts("hdlr: soun");

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

  522.             puts("hdlr: odsm");

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

  524.             puts("hdlr: sdsm");

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

  526. #endif

  527. 

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

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

  530.         c->mp4 = 0;

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

  532.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  534.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  537.         c->mp4 = 1;

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

  539.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  541.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  542.     }

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

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

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

  546. 

  547.     if(atom_size <= 24)

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

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

  550.     /* component name */

  551. 

  552.     if(c->mp4) {

  553.         /* .mp4: C string */

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

  555.     } else {

  556.         /* .mov: PASCAL string */

  557.         len = get_byte(pb);

  558.         buf = av_malloc(len+1);

  559.         get_buffer(pb, buf, len);

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

  561. #ifdef DEBUG

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

  563. #endif

  564.         av_free(buf);

  565.     }

  566. #if 0

  567.     len = get_byte(pb);

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

  569.     if(len < 32) {

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

  571.         buf = av_malloc(len+1);

  572.         get_buffer(pb, buf, len);

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

  574. #ifdef DEBUG

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

  576. #endif

  577.         av_free(buf);

  578.     } else {

  579.         /* MP4 string */

  580.         for(;;) {

  581.             if (len == 0)

  582.                 break;

  583.             len = get_byte(pb);

  584.         }

  585.     }

  586. #endif

  587.     

  588.     return 0;

  589. }

  590. 

  591. static int mp4_read_descr_len(ByteIOContext *pb)

  592. {

  593.     int c, len, count;

  594. 

  595.     len = 0;

  596.     count = 0;

  597.     for(;;) {

  598.         c = get_byte(pb);

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

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

  601.             break;

  602.         if (++count == 4)

  603.             break;

  604.     }

  605.     return len;

  606. }

  607. 

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

  609. {

  610.     int len;

  611.     *tag = get_byte(pb);

  612.     len = mp4_read_descr_len(pb);

  613. #ifdef DEBUG

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

  615. #endif

  616.     return len;

  617. }

  618. 

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

  620. {

  621.     MOVContext *c;

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

  623.     uint32_t format;

  624.     AVStream *st;

  625.     MOVStreamContext *sc;

  626. #ifdef DEBUG

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

  628. #endif

  629.     c = (MOVContext *)param;

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

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

  632. 

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

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

  635. 

  636.     entries = get_be32(pb);

  637. 

  638.     while(entries--) {

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

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

  641.         

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

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

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

  645. 

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

  647.         id = codec_get_id(mov_video_tags, format);

  648.         if (id >= 0) {

  649.             AVCodec *codec;

  650.             codec = avcodec_find_decoder(id);

  651.             if (codec)

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

  653.         }

  654. #ifdef DEBUG

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

  656.                size, 

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

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

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

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

  661.                st->codec.codec_type);

  662. #endif

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

  664.             st->codec.codec_tag = format;

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

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

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

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

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

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

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

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

  673. #if 1

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

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

  676.                    we ignore this info */

  677.                 st->codec.width = 0;

  678.                 st->codec.height = 0;

  679.             }

  680. #endif

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

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

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

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

  685. #ifdef DEBUG

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

  687. #endif

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

  689. 

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

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

  692.             

  693.             st->codec.frame_rate      = 25;

  694.             st->codec.frame_rate_base = 1;

  695.             

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

  697.             while (size >= 8) {

  698.                 int atom_size, atom_type;

  699.                 int64_t start_pos;

  700.                 

  701.                 atom_size = get_be32(pb);

  702.                 atom_type = get_le32(pb);

  703.                 size -= 8;

  704. #ifdef DEBUG

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

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

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

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

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

  710.                        atom_size, size);

  711. #endif

  712.                 start_pos = url_ftell(pb);

  713. 

  714.                 switch(atom_type) {

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

  716.                     {

  717.                         int tag, len;

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

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

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

  721.                         if (tag == 0x03) {

  722.                             /* MP4ESDescrTag */

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

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

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

  726.                             if (tag != 0x04)

  727.                                 goto fail;

  728.                             /* MP4DecConfigDescrTag */

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

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

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

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

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

  734.                             if (tag != 0x05)

  735.                                 goto fail;

  736.                             /* MP4DecSpecificDescrTag */

  737. #ifdef DEBUG

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

  739. #endif

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

  741.                             if (sc->header_data) {

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

  743.                                 sc->header_len = len;

  744.                             }

  745.                         }

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

  747.                     }

  748.                     break;

  749.                 default:

  750.                     break;

  751.                 }

  752.             fail:

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

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

  755.                 size -= atom_size - 8;

  756.             }

  757.             if (size > 0) {

  758.                 /* unknown extension */

  759.                 url_fskip(pb, size);

  760.             }

  761.         } else {

  762.             st->codec.codec_tag = format;

  763. 

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

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

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

  767. 

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

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

  770. #ifdef DEBUG

  771.             if(samp_sz != 16)

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

  773. #endif            

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

  775.             /* handle specific s8 codec */

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

  777.             st->codec.codec_id = CODEC_ID_PCM_S8;

  778. 

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

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

  781.             

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

  783.             st->codec.bit_rate = 0;

  784. #if 0

  785. 

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

  787.             get_be16(pb); /*  */

  788.             get_be16(pb); /*  */

  789.             get_be16(pb); /*  */

  790.             get_be16(pb); /*  */

  791. #endif            

  792.             if(size > 16)

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

  794.         }

  795.     }

  796. /*

  797.     if(len) {

  798.     buf = av_malloc(len+1);

  799.         get_buffer(pb, buf, len);

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

  801.         puts(buf);

  802.         av_free(buf);

  803.     }

  804. */

  805.     return 0;

  806. }

  807. 

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

  809. {

  810.     MOVContext *c;

  811.     int entries, i;

  812.     AVStream *st;

  813.     MOVStreamContext *sc;

  814. #ifdef DEBUG

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

  816. #endif

  817.     c = (MOVContext *)param;

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

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

  820.     

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

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

  823. 

  824.     entries = get_be32(pb);

  825.     sc->chunk_count = entries;

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

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

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

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

  830.         }

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

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

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

  834.         }

  835.     } else

  836.         return -1;

  837. #ifdef DEBUG

  838. /*

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

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

  841.     }

  842. */

  843. #endif

  844.     return 0;

  845. }

  846. 

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

  848. {

  849.     MOVContext *c;

  850.     int entries, i;

  851.     AVStream *st;

  852.     MOVStreamContext *sc;

  853. #ifdef DEBUG

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

  855. #endif

  856.     c = (MOVContext *)param;

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

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

  859.     

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

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

  862. 

  863.     entries = get_be32(pb);

  864. #ifdef DEBUG

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

  866. #endif

  867.     sc->sample_to_chunk_sz = entries;

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

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

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

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

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

  873. #ifdef DEBUG

  874. /*        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); */

  875. #endif

  876.     }

  877.     return 0;

  878. }

  879. 

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

  881. {

  882.     MOVContext *c;

  883.     int entries, i;

  884.     AVStream *st;

  885.     MOVStreamContext *sc;

  886. #ifdef DEBUG

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

  888. #endif

  889.     c = (MOVContext *)param;

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

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

  892.     

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

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

  895.     

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

  897.     entries = get_be32(pb);

  898.     sc->sample_count = entries;

  899. #ifdef DEBUG

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

  901. #endif

  902.     if(sc->sample_size)

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

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

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

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

  907. #ifdef DEBUG

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

  909. #endif

  910.     }

  911.     return 0;

  912. }

  913. 

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

  915. {

  916.     MOVContext *c;

  917.     int entries, i;

  918.     AVStream *st;

  919.     MOVStreamContext *sc;

  920. #ifdef DEBUG

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

  922. #endif

  923.     c = (MOVContext *)param;

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

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

  926. 

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

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

  929.     entries = get_be32(pb);

  930. #ifdef DEBUG

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

  932. #endif

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

  934.         int sample_duration;

  935. 

  936.         get_be32(pb);

  937.         sample_duration = get_be32(pb);

  938. 

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

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

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

  942. #ifdef DEBUG

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

  944. #endif

  945.         }

  946.     }

  947.     return 0;

  948. }

  949. 

  950. #ifdef CONFIG_ZLIB

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

  952. {

  953.     return -1;

  954. }

  955. 

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

  957. {

  958.     MOVContext *c;

  959.     ByteIOContext ctx;

  960.     char *cmov_data;

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

  962.     long cmov_len, moov_len;

  963.     int ret;

  964. #ifdef DEBUG

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

  966. #endif

  967.     c = (MOVContext *)param;

  968. 

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

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

  971.         return -1;

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

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

  974.         return -1;

  975.     }

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

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

  978.         return -1;

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

  980.     cmov_len = atom_size - 6 * 4;

  981.     

  982.     cmov_data = av_malloc(cmov_len);

  983.     if (!cmov_data)

  984.         return -1;

  985.     moov_data = av_malloc(moov_len);

  986.     if (!moov_data) {

  987.         av_free(cmov_data);

  988.         return -1;

  989.     }

  990.     get_buffer(pb, cmov_data, cmov_len);

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

  992.         return -1;

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

  994.         return -1;

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

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

  997.     av_free(moov_data);

  998.     av_free(cmov_data);

  999.     return ret;

  1000. }

  1001. #endif

  1002. 

  1003. static const MOVParseTableEntry mov_default_parse_table[] = {

  1004. /* mp4 atoms */

  1005. { MKTAG( 'm', 'p', '4', 'a' ), parse_default },

  1006. { MKTAG( 'c', 'o', '6', '4' ), parse_stco },

  1007. { MKTAG( 's', 't', 'c', 'o' ), parse_stco },

  1008. { MKTAG( 'c', 'r', 'h', 'd' ), parse_default },

  1009. { MKTAG( 'c', 't', 't', 's' ), parse_leaf },

  1010. { MKTAG( 'c', 'p', 'r', 't' ), parse_default },

  1011. { MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },

  1012. { MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },

  1013. { MKTAG( 'd', 'i', 'n', 'f' ), parse_default },

  1014. { MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },

  1015. { MKTAG( 's', 't', 'd', 'p' ), parse_default },

  1016. { MKTAG( 'e', 's', 'd', 's' ), parse_default },

  1017. { MKTAG( 'e', 'd', 't', 's' ), parse_default },

  1018. { MKTAG( 'e', 'l', 's', 't' ), parse_leaf },

  1019. { MKTAG( 'u', 'u', 'i', 'd' ), parse_default },

  1020. { MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },

  1021. { MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },

  1022. { MKTAG( 'h', 'm', 'h', 'd' ), parse_leaf },

  1023. { MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },

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

  1025. { MKTAG( 'm', 'p', '4', 's' ), parse_default },

  1026. { MKTAG( 'm', 'd', 'i', 'a' ), parse_default },

  1027. { MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },

  1028. { MKTAG( 'm', 'd', 'h', 'd' ), parse_mdhd },

  1029. { MKTAG( 'm', 'i', 'n', 'f' ), parse_default },

  1030. { MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },

  1031. { MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },

  1032. { MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },

  1033. { MKTAG( 'o', 'd', 'h', 'd' ), parse_default },

  1034. { MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },

  1035. { MKTAG( 's', 't', 's', 'd' ), parse_stsd },

  1036. { MKTAG( 's', 't', 's', 'z' ), parse_stsz },

  1037. { MKTAG( 's', 't', 'b', 'l' ), parse_default },

  1038. { MKTAG( 's', 't', 's', 'c' ), parse_stsc },

  1039. { MKTAG( 's', 'd', 'h', 'd' ), parse_default },

  1040. { MKTAG( 's', 't', 's', 'h' ), parse_default },

  1041. { MKTAG( 's', 'k', 'i', 'p' ), parse_default },

  1042. { MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },

  1043. { MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },

  1044. { MKTAG( 's', 't', 's', 's' ), parse_leaf },

  1045. { MKTAG( 's', 't', 't', 's' ), parse_stts },

  1046. { MKTAG( 't', 'r', 'a', 'k' ), parse_trak },

  1047. { MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },

  1048. { MKTAG( 't', 'r', 'e', 'f' ), parse_default }, /* not really */

  1049. { MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },

  1050. { MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },

  1051. { MKTAG( 'm', 'p', '4', 'v' ), parse_default },

  1052. /* extra mp4 */

  1053. { MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },

  1054. /* QT atoms */

  1055. { MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },

  1056. { MKTAG( 'c', 'l', 'i', 'p' ), parse_default },

  1057. { MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },

  1058. { MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },

  1059. { MKTAG( 'm', 'a', 't', 't' ), parse_default },

  1060. { MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },

  1061. { MKTAG( 'r', 'm', 'd', 'a' ), parse_default },

  1062. { MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },

  1063. //{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },

  1064. { MKTAG( 'r', 'm', 'r', 'a' ), parse_default },

  1065. { MKTAG( 's', 'c', 'p', 't' ), parse_leaf },

  1066. { MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },

  1067. { MKTAG( 's', 's', 'r', 'c' ), parse_leaf },

  1068. { MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },

  1069. { MKTAG( 'w', 'i', 'd', 'e' ), parse_wide }, /* place holder */

  1070. #ifdef CONFIG_ZLIB

  1071. { MKTAG( 'c', 'm', 'o', 'v' ), parse_cmov },

  1072. #else

  1073. { MKTAG( 'c', 'm', 'o', 'v' ), parse_leaf },

  1074. #endif

  1075. { 0L, parse_leaf }

  1076. };

  1077. 

  1078. static void mov_free_stream_context(MOVStreamContext *sc)

  1079. {

  1080.     if(sc) {

  1081.         av_free(sc->chunk_offsets);

  1082.         av_free(sc->sample_to_chunk);

  1083.         av_free(sc->header_data);

  1084.         av_free(sc);

  1085.     }

  1086. }

  1087. 

  1088. static uint32_t to_tag(uint8_t *buf)

  1089. {

  1090.     return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);

  1091. }

  1092. 

  1093. static uint32_t to_be32(uint8_t *buf)

  1094. {

  1095.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1096. }

  1097. 

  1098. /* XXX: is it suffisant ? */

  1099. static int mov_probe(AVProbeData *p)

  1100. {

  1101.     unsigned int offset;

  1102.     uint32_t tag;

  1103. 

  1104.     /* check file header */

  1105.     if (p->buf_size <= 12)

  1106.         return 0;

  1107.     offset = 0;

  1108.     for(;;) {

  1109.         /* ignore invalid offset */

  1110.         if ((offset + 8) > (unsigned int)p->buf_size)

  1111.             return 0;

  1112.         tag = to_tag(p->buf + offset + 4);

  1113.         switch(tag) {

  1114.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1115.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1116.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1117.         case MKTAG( 'm', 'd', 'a', 't' ):

  1118.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1119.             return AVPROBE_SCORE_MAX;

  1120.         case MKTAG( 'f', 't', 'y', 'p' ):

  1121.         case MKTAG( 's', 'k', 'i', 'p' ):            

  1122.             offset = to_be32(p->buf) + offset;

  1123.             break;

  1124.         default:

  1125.             /* unrecognized tag */

  1126.             return 0;

  1127.         }

  1128.     }

  1129.     return 0;

  1130. }

  1131. 

  1132. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1133. {

  1134.     MOVContext *mov = s->priv_data;

  1135.     ByteIOContext *pb = &s->pb;

  1136.     int i, j, nb, err;

  1137.     int64_t size;

  1138. 

  1139.     mov->fc = s;

  1140. #if 0

  1141.     /* XXX: I think we should auto detect */

  1142.     if(s->iformat->name[1] == 'p')

  1143.         mov->mp4 = 1;

  1144. #endif

  1145.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1146.         size = url_filesize(url_fileno(pb));

  1147.     else

  1148.         size = 0x7FFFFFFFFFFFFFFF;

  1149. 

  1150. #ifdef DEBUG

  1151.     printf("filesz=%Ld\n", size);

  1152. #endif

  1153. 

  1154.     /* check MOV header */

  1155.     err = parse_default(mov_default_parse_table, pb, 0L, 0LL, size, mov);

  1156.     if(err<0 || (!mov->found_moov || !mov->found_mdat)) {

  1157.         puts("header not found !!!");

  1158.         exit(1);

  1159.     }

  1160. #ifdef DEBUG

  1161.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1162. #endif

  1163.     /* some cleanup : make sure we are on the mdat atom */

  1164.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1165.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1166. 

  1167.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1168. 

  1169. #ifdef DEBUG

  1170.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1171. #endif

  1172. 

  1173. #ifdef DEBUG

  1174.     printf("streams= %d\n", s->nb_streams);

  1175. #endif

  1176.     mov->total_streams = nb = s->nb_streams;

  1177.     

  1178. #if 1

  1179.     for(i=0; i<s->nb_streams;) {

  1180.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1181.             av_free(s->streams[i]);

  1182.             for(j=i+1; j<s->nb_streams; j++)

  1183.                 s->streams[j-1] = s->streams[j];

  1184.             s->nb_streams--;

  1185.         } else

  1186.             i++;

  1187.     }

  1188.     for(i=0; i<s->nb_streams;i++) {

  1189.         MOVStreamContext *sc;

  1190.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1191.         sc->ffindex = i;

  1192.         sc->is_ff_stream = 1;

  1193.     }

  1194. #endif

  1195. #ifdef DEBUG

  1196.     printf("real streams= %d\n", s->nb_streams);

  1197. #endif

  1198.     return 0;

  1199. }

  1200. 

  1201. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1202. /* XXX:remove useless commented code sometime */

  1203. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1204. {

  1205.     MOVContext *mov = s->priv_data;

  1206.     MOVStreamContext *sc;

  1207.     int64_t offset = 0x0FFFFFFFFFFFFFFF;

  1208.     int i;

  1209.     int st_id = 0, size;

  1210.     size = 0x0FFFFFFF;

  1211.     

  1212. #ifdef MOV_SPLIT_CHUNKS

  1213.     if (mov->partial) {

  1214.         

  1215.         int idx;

  1216. 

  1217.         st_id = mov->partial - 1;

  1218.         idx = mov->streams[st_id]->sample_to_chunk_index;

  1219.         if (idx < 0) return 0;

  1220.         size = mov->streams[st_id]->sample_sizes[mov->streams[st_id]->current_sample];

  1221. 

  1222.         mov->streams[st_id]->current_sample++;

  1223.         mov->streams[st_id]->left_in_chunk--;

  1224. 

  1225.         if(mov->streams[st_id]->left_in_chunk <= 0)

  1226.             mov->partial = 0;

  1227.         offset = mov->next_chunk_offset;

  1228.         /* extract the sample */

  1229. 

  1230.         goto readchunk;

  1231.     }

  1232. #endif

  1233. 

  1234. again:

  1235.     for(i=0; i<mov->total_streams; i++) {

  1236.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  1237.         && (mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] < offset)) {

  1238.             st_id = i;

  1239.             offset = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk];

  1240.         }

  1241.     }

  1242.     mov->streams[st_id]->next_chunk++;

  1243.     if(offset==0x0FFFFFFFFFFFFFFF)

  1244.         return -1;

  1245.     

  1246.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1247.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1248.         mov->next_chunk_offset = offset;

  1249.     }

  1250. 

  1251. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1252.     if(!mov->streams[st_id]->is_ff_stream) {

  1253.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1254.         mov->next_chunk_offset = offset;

  1255.         offset = 0x0FFFFFFFFFFFFFFF;

  1256.         goto again;

  1257.     }

  1258. 

  1259.     /* now get the chunk size... */

  1260. 

  1261.     for(i=0; i<mov->total_streams; i++) {

  1262.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  1263.         && ((mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset) < size)) {

  1264.             size = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset;

  1265.         }

  1266.     }

  1267. #ifdef MOV_SPLIT_CHUNKS

  1268.     /* split chunks into samples */

  1269.     if(mov->streams[st_id]->sample_size == 0) {

  1270.         int idx;

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

  1272.         if ((idx + 1 < mov->streams[st_id]->sample_to_chunk_sz)

  1273.                && (mov->streams[st_id]->next_chunk >= mov->streams[st_id]->sample_to_chunk[idx + 1].first))

  1274.            idx++; 

  1275.         mov->streams[st_id]->sample_to_chunk_index = idx;

  1276.         if(idx >= 0 && mov->streams[st_id]->sample_to_chunk[idx].count != 1) {

  1277.             mov->partial = st_id+1;

  1278.             /* we'll have to get those samples before next chunk */

  1279.             mov->streams[st_id]->left_in_chunk = (mov->streams[st_id]->sample_to_chunk[idx].count) - 1;

  1280.             size = mov->streams[st_id]->sample_sizes[mov->streams[st_id]->current_sample];

  1281.         }

  1282. 

  1283.         mov->streams[st_id]->current_sample++;

  1284.     }

  1285. #endif

  1286. 

  1287. readchunk:

  1288. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1289.     if(size == 0x0FFFFFFF)

  1290.         size = mov->mdat_size + mov->mdat_offset - offset;

  1291.     if(size < 0)

  1292.         return -1;

  1293.     if(size == 0)

  1294.         return -1;

  1295.     url_fseek(&s->pb, offset, SEEK_SET);

  1296.     sc = mov->streams[st_id];

  1297.     if (sc->header_len > 0) {

  1298.         av_new_packet(pkt, size + sc->header_len);

  1299.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1300.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1301.         /* free header */

  1302.         av_freep(&sc->header_data);

  1303.         sc->header_len = 0;

  1304.     } else {

  1305.         av_new_packet(pkt, size);

  1306.         get_buffer(&s->pb, pkt->data, pkt->size);

  1307.     }

  1308.     pkt->stream_index = sc->ffindex;

  1309. 

  1310. #ifdef DEBUG

  1311. /*

  1312.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1313.     for(i=0; i<8; i++)

  1314.         printf("%02x ", pkt->data[i]);

  1315.     for(i=0; i<8; i++)

  1316.         printf("%c ", (pkt->data[i]) & 0x7F);

  1317.     puts("");

  1318. */

  1319. #endif

  1320. 

  1321.     mov->next_chunk_offset = offset + size;

  1322. 

  1323.     return 0;

  1324. }

  1325. 

  1326. static int mov_read_close(AVFormatContext *s)

  1327. {

  1328.     int i;

  1329.     MOVContext *mov = s->priv_data;

  1330.     for(i=0; i<mov->total_streams; i++)

  1331.         mov_free_stream_context(mov->streams[i]);

  1332.     for(i=0; i<s->nb_streams; i++)

  1333. 	av_freep(&s->streams[i]);

  1334.     return 0;

  1335. }

  1336. 

  1337. static AVInputFormat mov_iformat = {

  1338.     "mov",

  1339.     "QuickTime/MPEG4 format",

  1340.     sizeof(MOVContext),

  1341.     mov_probe,

  1342.     mov_read_header,

  1343.     mov_read_packet,

  1344.     mov_read_close,

  1345. };

  1346. 

  1347. int mov_init(void)

  1348. {

  1349.     av_register_input_format(&mov_iformat);

  1350.     return 0;

  1351. }