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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. #ifdef DEBUG

  54. #include <stdio.h>

  55. #include <fcntl.h>

  56. #endif

  57. 

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

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

  60. #define MOV_SPLIT_CHUNKS

  61. 

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

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

  64. /* getting rid of these */

  65. #define CODEC_TYPE_MOV_OTHER	(enum CodecType) 2

  66. 

  67. static const CodecTag mov_video_tags[] = {

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

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

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

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

  72. /* Graphics */

  73. /* Animation */

  74. /* Apple video */

  75. /* Kodak Photo CD */

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

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

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

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

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

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

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

  83. /* Sorenson video */

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

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

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

  87.     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */

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

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

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

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

  92.     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */

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

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

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

  96.     { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */

  97.     { CODEC_ID_NONE, 0 },

  98. };

  99. 

  100. static const CodecTag mov_audio_tags[] = {

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

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

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

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

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

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

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

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

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

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

  111. 

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

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

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

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

  116. /* MP4 tags */

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

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

  119.     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */

  120.     { CODEC_ID_NONE, 0 },

  121. };

  122. 

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

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

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

  126.  */

  127. 

  128. typedef struct MOV_sample_to_chunk_tbl {

  129.     long first;

  130.     long count;

  131.     long id;

  132. } MOV_sample_to_chunk_tbl;

  133. 

  134. typedef struct {

  135.     uint32_t type;

  136.     int64_t offset;

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

  138. } MOV_atom_t;

  139. 

  140. typedef struct {

  141.     int seed;

  142.     int flags;

  143.     int size;

  144.     void* clrs;

  145. } MOV_ctab_t;

  146. 

  147. typedef struct {

  148.     uint8_t  version;

  149.     uint32_t flags; // 24bit

  150. 

  151.     /* 0x03 ESDescrTag */

  152.     uint16_t es_id;

  153. #define MP4ODescrTag			0x01

  154. #define MP4IODescrTag			0x02

  155. #define MP4ESDescrTag			0x03

  156. #define MP4DecConfigDescrTag		0x04

  157. #define MP4DecSpecificDescrTag		0x05

  158. #define MP4SLConfigDescrTag		0x06

  159. #define MP4ContentIdDescrTag		0x07

  160. #define MP4SupplContentIdDescrTag	0x08

  161. #define MP4IPIPtrDescrTag		0x09

  162. #define MP4IPMPPtrDescrTag		0x0A

  163. #define MP4IPMPDescrTag			0x0B

  164. #define MP4RegistrationDescrTag		0x0D

  165. #define MP4ESIDIncDescrTag		0x0E

  166. #define MP4ESIDRefDescrTag		0x0F

  167. #define MP4FileIODescrTag		0x10

  168. #define MP4FileODescrTag		0x11

  169. #define MP4ExtProfileLevelDescrTag	0x13

  170. #define MP4ExtDescrTagsStart		0x80

  171. #define MP4ExtDescrTagsEnd		0xFE

  172.     uint8_t  stream_priority;

  173. 

  174.     /* 0x04 DecConfigDescrTag */

  175.     uint8_t  object_type_id;

  176.     uint8_t  stream_type;

  177.     /* XXX: really streamType is

  178.      * only 6bit, followed by:

  179.      * 1bit  upStream

  180.      * 1bit  reserved

  181.      */

  182.     uint32_t buffer_size_db; // 24

  183.     uint32_t max_bitrate;

  184.     uint32_t avg_bitrate;

  185. 

  186.     /* 0x05 DecSpecificDescrTag */

  187.     uint8_t  decoder_cfg_len;

  188.     uint8_t *decoder_cfg;

  189. 

  190.     /* 0x06 SLConfigDescrTag */

  191.     uint8_t  sl_config_len;

  192.     uint8_t *sl_config;

  193. } MOV_esds_t;

  194. 

  195. struct MOVParseTableEntry;

  196. 

  197. typedef struct MOVStreamContext {

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

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

  200.     long next_chunk;

  201.     long chunk_count;

  202.     int64_t *chunk_offsets;

  203.     long sample_to_chunk_sz;

  204.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  205.     long sample_to_chunk_index;

  206.     long sample_size;

  207.     long sample_count;

  208.     long *sample_sizes;

  209.     int time_scale;

  210.     long current_sample;

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

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

  213.     int header_len;

  214.     uint8_t *header_data;

  215.     MOV_esds_t esds;

  216. } MOVStreamContext;

  217. 

  218. typedef struct MOVContext {

  219.     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) */

  220.     AVFormatContext *fc;

  221.     int time_scale;

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

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

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

  225.     int64_t mdat_size;

  226.     int64_t mdat_offset;

  227.     int total_streams;

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

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

  230.      */

  231.     MOVStreamContext *streams[MAX_STREAMS];

  232. 

  233.     int64_t next_chunk_offset;

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

  235.     int ctab_size;

  236.     MOV_ctab_t **ctab;           /* color tables */

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

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

  239. } MOVContext;

  240. 

  241. 

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

  243. 

  244. /* those functions parse an atom */

  245. /* return code:

  246.  1: found what I wanted, exit

  247.  0: continue to parse next atom

  248.  -1: error occured, exit

  249.  */

  250. typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);

  251. 

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

  253. typedef struct MOVParseTableEntry {

  254.     uint32_t type;

  255.     mov_parse_function func;

  256. } MOVParseTableEntry;

  257. 

  258. #ifdef DEBUG

  259. /*

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

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

  262.  */

  263. static int debug_indent = 0;

  264. void print_atom(const char *str, MOV_atom_t atom)

  265. {

  266.     unsigned int tag, i;

  267.     tag = (unsigned int) atom.type;

  268.     i=debug_indent;

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

  270.     while(i--)

  271.         printf("|");

  272.     printf("parse:");

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

  274.            str, tag & 0xff,

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

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

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

  278.            (unsigned int)atom.offset,

  279. 	   (unsigned int)atom.size);

  280.     assert((unsigned int)atom.size < 0x7fffffff);// catching errors

  281. }

  282. #else

  283. #define print_atom(a,b)

  284. #endif

  285. 

  286. 

  287. static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  288. {

  289.     print_atom("leaf", atom);

  290. 

  291.     if (atom.size>1)

  292.         url_fskip(pb, atom.size);

  293. /*        url_seek(pb, atom_offset+atom.size, SEEK_SET); */

  294.     return 0;

  295. }

  296. 

  297. static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  298. {

  299.     int64_t total_size = 0;

  300.     MOV_atom_t a;

  301.     int i;

  302.     int err = 0;

  303. 

  304. #ifdef DEBUG

  305.     print_atom("default", atom);

  306.     debug_indent++;

  307. #endif

  308. 

  309.     a.offset = atom.offset;

  310. 

  311.     if (atom.size < 0)

  312. 	atom.size = 0x7fffffffffffffffLL;

  313.     while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {

  314. 	a.size = atom.size;

  315. 	a.type=0L;

  316.         if(atom.size >= 8) {

  317. 	    a.size = get_be32(pb);

  318.             a.type = get_le32(pb);

  319.         }

  320. 	total_size += 8;

  321.         a.offset += 8;

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

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

  324. 	    a.size = get_be64(pb) - 8;

  325.             a.offset += 8;

  326.             total_size += 8;

  327.         }

  328. 	if (a.size == 0) {

  329. 	    a.size = atom.size - total_size;

  330. 	    if (a.size <= 8)

  331.                 break;

  332. 	}

  333. 	for (i = 0; c->parse_table[i].type != 0L

  334. 	     && c->parse_table[i].type != a.type; i++)

  335. 	    /* empty */;

  336. 

  337. 	a.size -= 8;

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

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

  340. //            url_seek(pb, atom.offset+atom.size, SEEK_SET);

  341. #ifdef DEBUG

  342.             print_atom("unknown", a);

  343. #endif

  344.             url_fskip(pb, a.size);

  345. 	} else {

  346. #ifdef DEBUG

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

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

  349. #endif

  350. 	    err = (c->parse_table[i].func)(c, pb, a);

  351. 	}

  352. 

  353. 	a.offset += a.size;

  354.         total_size += a.size;

  355.     }

  356. 

  357.     if (!err && total_size < atom.size && atom.size < 0x7ffff) {

  358. 	//printf("RESET  %Ld  %Ld  err:%d\n", atom.size, total_size, err);

  359.         url_fskip(pb, atom.size - total_size);

  360.     }

  361. 

  362. #ifdef DEBUG

  363.     debug_indent--;

  364. #endif

  365.     return err;

  366. }

  367. 

  368. static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  369. {

  370.     unsigned int len;

  371.     MOV_ctab_t *t;

  372.     //url_fskip(pb, atom.size); // for now

  373.     c->ctab = av_realloc(c->ctab, ++c->ctab_size);

  374.     t = c->ctab[c->ctab_size];

  375.     t->seed = get_be32(pb);

  376.     t->flags = get_be16(pb);

  377.     t->size = get_be16(pb) + 1;

  378.     len = 2 * t->size * 4;

  379.     if (len > 0) {

  380. 	t->clrs = av_malloc(len); // 16bit A R G B

  381. 	if (t->clrs)

  382. 	    get_buffer(pb, t->clrs, len);

  383.     }

  384. 

  385.     return 0;

  386. }

  387. 

  388. static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  389. {

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

  391.     int len = 0;

  392.     uint32_t type;

  393.     uint32_t ctype;

  394. 

  395.     print_atom("hdlr", atom);

  396. 

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

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

  399. 

  400.     /* component type */

  401.     ctype = get_le32(pb);

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

  403. 

  404. #ifdef DEBUG

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

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

  407. #endif

  408. #ifdef DEBUG

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

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

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

  412.             puts("hdlr: vide");

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

  414.             puts("hdlr: soun");

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

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

  417.             puts("hdlr: vide");

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

  419.             puts("hdlr: soun");

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

  421.             puts("hdlr: odsm");

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

  423.             puts("hdlr: sdsm");

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

  425. #endif

  426. 

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

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

  429.         c->mp4 = 0;

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

  431.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  433.             st->codec.codec_type = CODEC_TYPE_AUDIO;

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

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

  436.         c->mp4 = 1;

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

  438.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  440.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  441.     }

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

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

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

  445. 

  446.     if(atom.size <= 24)

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

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

  449.     /* component name */

  450. 

  451.     if(c->mp4) {

  452.         /* .mp4: C string */

  453.         while(get_byte(pb) && (++len < (atom.size - 24)));

  454.     } else {

  455.         /* .mov: PASCAL string */

  456. #ifdef DEBUG

  457.         char* buf;

  458. #endif

  459.         len = get_byte(pb);

  460. #ifdef DEBUG

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

  462. 	if (buf) {

  463. 	    get_buffer(pb, buf, len);

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

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

  466. 	    av_free(buf);

  467. 	} else

  468. #endif

  469. 	    url_fskip(pb, len);

  470.     }

  471. 

  472.     return 0;

  473. }

  474. 

  475. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  476. {

  477.     int len = 0;

  478.     int count = 4;

  479.     while (count--) {

  480.         int c = get_byte(pb);

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

  482. 	if (!(c & 0x80))

  483. 	    break;

  484.     }

  485.     return len;

  486. }

  487. 

  488. static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)

  489. {

  490.     int len;

  491.     *tag = get_byte(pb);

  492.     len = mov_mp4_read_descr_len(pb);

  493. #ifdef DEBUG

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

  495. #endif

  496.     return len;

  497. }

  498. 

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

  500. {

  501.     unsigned int val;

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

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

  504.     val |= get_byte(s);

  505.     return val;

  506. }

  507. 

  508. static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  509. {

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

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

  512.     int64_t start_pos = url_ftell(pb);

  513.     int tag, len;

  514. 

  515.     print_atom("esds", atom);

  516. 

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

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

  519.     len = mov_mp4_read_descr(pb, &tag);

  520.     if (tag == MP4ESDescrTag) {

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

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

  523.     } else

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

  525. 

  526.     len = mov_mp4_read_descr(pb, &tag);

  527.     if (tag == MP4DecConfigDescrTag) {

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

  529. 	sc->esds.stream_type = get_byte(pb);

  530. 	sc->esds.buffer_size_db = get_be24(pb);

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

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

  533. 

  534. 	len = mov_mp4_read_descr(pb, &tag);

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

  536. 	if (tag == MP4DecSpecificDescrTag) {

  537. #ifdef DEBUG

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

  539. #endif

  540. 	    st->codec.extradata = (uint8_t*) av_mallocz(len);

  541. 	    if (st->codec.extradata) {

  542. 		get_buffer(pb, st->codec.extradata, len);

  543. 		st->codec.extradata_size = len;

  544. 	    }

  545. 	}

  546.     }

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

  548.     url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));

  549.     return 0;

  550. }

  551. 

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

  553. static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  554. {

  555.     print_atom("mdat", atom);

  556. 

  557.     if(atom.size == 0) /* wrong one (MP4) */

  558.         return 0;

  559.     c->found_mdat=1;

  560.     c->mdat_offset = atom.offset;

  561.     c->mdat_size = atom.size;

  562.     if(c->found_moov)

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

  564.     url_fskip(pb, atom.size);

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

  566. }

  567. 

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

  569. static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  570. {

  571.     int err;

  572. 

  573.     print_atom("moov", atom);

  574. 

  575.     err = mov_read_default(c, pb, atom);

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

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

  578.     c->found_moov=1;

  579.     if(c->found_mdat)

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

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

  582. }

  583. 

  584. 

  585. static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  586. {

  587.     print_atom("mdhd", atom);

  588. 

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

  590. 

  591.     get_byte(pb); get_byte(pb);

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

  593. 

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

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

  596. 

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

  598. 

  599. #ifdef DEBUG

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

  601. #endif

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

  603. 

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

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

  606. 

  607.     return 0;

  608. }

  609. 

  610. static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  611. {

  612.     print_atom("mvhd", atom);

  613. 

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

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

  616. 

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

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

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

  620. #ifdef DEBUG

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

  622. #endif

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

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

  625. 

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

  627. 

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

  629. 

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

  631. 

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

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

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

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

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

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

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

  639. 

  640.     return 0;

  641. }

  642. 

  643. static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  644. {

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

  646. 

  647.     // currently SVQ3 decoder expect full STSD header - so let's fake it

  648.     // this should be fixed and just SMI header should be passed

  649.     av_free(st->codec.extradata);

  650.     st->codec.extradata_size = 0x5a + atom.size;

  651.     st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size);

  652. 

  653.     if (st->codec.extradata) {

  654.         int i;

  655. 	strcpy(st->codec.extradata, "SVQ3"); // fake

  656. 	get_buffer(pb, st->codec.extradata + 0x5a, atom.size);

  657. 	//printf("Reading SMI %Ld  %s\n", atom.size, (char*)st->codec.extradata + 0x5a);

  658.     } else

  659. 	url_fskip(pb, atom.size);

  660. 

  661.     return 0;

  662. }

  663. 

  664. static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  665. {

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

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

  668.     int entries, i;

  669. 

  670.     print_atom("stco", atom);

  671. 

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

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

  674. 

  675.     entries = get_be32(pb);

  676.     sc->chunk_count = entries;

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

  678.     if (!sc->chunk_offsets)

  679.         return -1;

  680.     if (atom.type == MKTAG('s', 't', 'c', 'o')) {

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

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

  683.         }

  684.     } else if (atom.type == MKTAG('c', 'o', '6', '4')) {

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

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

  687.         }

  688.     } else

  689.         return -1;

  690. #ifdef DEBUG

  691. /*

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

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

  694.     }

  695. */

  696. #endif

  697.     return 0;

  698. }

  699. 

  700. static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  701. {

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

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

  704.     int entries, frames_per_sample;

  705.     uint32_t format;

  706. 

  707.     print_atom("stsd", atom);

  708. 

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

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

  711. 

  712.     entries = get_be32(pb);

  713. 

  714.     while(entries--) { //Parsing Sample description table

  715.         enum CodecID id;

  716. 	int size = get_be32(pb); /* size */

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

  718. 

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

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

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

  722. 

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

  724.         id = codec_get_id(mov_video_tags, format);

  725.         if (id >= 0) {

  726.             AVCodec *codec;

  727. 	    codec = avcodec_find_decoder(id);

  728.             if (codec)

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

  730.         }

  731. #ifdef DEBUG

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

  733.                size,

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

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

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

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

  738.                st->codec.codec_type);

  739. #endif

  740. 	st->codec.codec_tag = format;

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

  742. 	    MOV_atom_t a = { 0, 0, 0 };

  743.             st->codec.codec_id = id;

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

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

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

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

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

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

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

  751. #if 1

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

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

  754.                    we ignore this info */

  755.                 st->codec.width = 0;

  756.                 st->codec.height = 0;

  757.             }

  758. #endif

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

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

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

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

  763. #ifdef DEBUG

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

  765. #endif

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

  767. 

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

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

  770. 

  771.             st->codec.frame_rate      = 25;

  772.             st->codec.frame_rate_base = 1;

  773. 

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

  775. #if 0

  776. 	    while (size >= 8) {

  777. 		MOV_atom_t a;

  778.                 int64_t start_pos;

  779. 

  780. 		a.size = get_be32(pb);

  781. 		a.type = get_le32(pb);

  782. 		size -= 8;

  783. #ifdef DEBUG

  784.                 printf("VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",

  785.                        (a.type >> 0) & 0xff,

  786.                        (a.type >> 8) & 0xff,

  787.                        (a.type >> 16) & 0xff,

  788.                        (a.type >> 24) & 0xff,

  789. 		       a.size, size);

  790. #endif

  791.                 start_pos = url_ftell(pb);

  792. 

  793. 		switch(a.type) {

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

  795.                     {

  796.                         int tag, len;

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

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

  799. 			len = mov_mp4_read_descr(pb, &tag);

  800.                         if (tag == 0x03) {

  801.                             /* MP4ESDescrTag */

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

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

  804. 			    len = mov_mp4_read_descr(pb, &tag);

  805.                             if (tag != 0x04)

  806.                                 goto fail;

  807.                             /* MP4DecConfigDescrTag */

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

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

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

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

  812.                             len = mov_mp4_read_descr(pb, &tag);

  813.                             if (tag != 0x05)

  814.                                 goto fail;

  815.                             /* MP4DecSpecificDescrTag */

  816. #ifdef DEBUG

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

  818. #endif

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

  820.                             if (sc->header_data) {

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

  822. 				sc->header_len = len;

  823.                             }

  824.                         }

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

  826.                     }

  827.                     break;

  828.                 default:

  829.                     break;

  830.                 }

  831. 	    fail:

  832. 		printf("ATOMENEWSIZE %Ld   %d\n", atom.size, url_ftell(pb) - start_pos);

  833. 		if (atom.size > 8) {

  834. 		    url_fskip(pb, (atom.size - 8) -

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

  836. 		    size -= atom.size - 8;

  837. 		}

  838. 	    }

  839.             if (size > 0) {

  840.                 /* unknown extension */

  841.                 url_fskip(pb, size);

  842.             }

  843. #else

  844.             a.size = size;

  845. 	    mov_read_default(c, pb, a);

  846. #endif

  847. 	} else {

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

  849. 	    if(st->codec.codec_id==CODEC_ID_AMR_NB) //from TS26.244

  850. 	    {

  851. #ifdef DEBUG

  852.                printf("AMR-NB audio identified!!\n");

  853. #endif

  854.                get_be32(pb);get_be32(pb); //Reserved_8

  855.                get_be16(pb);//Reserved_2

  856.                get_be16(pb);//Reserved_2

  857.                get_be32(pb);//Reserved_4

  858.                get_be16(pb);//TimeScale

  859.                get_be16(pb);//Reserved_2

  860. 

  861.                 //AMRSpecificBox.(10 bytes)

  862.                 

  863. #ifdef DEBUG

  864.                int damr_size=

  865. #endif

  866.                get_be32(pb); //size

  867. #ifdef DEBUG

  868.                int damr_type=

  869. #endif

  870.                get_be32(pb); //type=='damr'

  871. #ifdef DEBUG

  872.                int damr_vendor=

  873. #endif

  874.                get_be32(pb); //vendor

  875.                get_byte(pb); //decoder version

  876.                get_be16(pb); //mode_set

  877.                get_byte(pb); //mode_change_period

  878.                get_byte(pb); //frames_per_sample

  879. 

  880. #ifdef DEBUG

  881.                printf("Audio: damr_type=%c%c%c%c damr_size=%Ld damr_vendor=%c%c%c%c\n",

  882.                        (damr_type >> 24) & 0xff,

  883.                        (damr_type >> 16) & 0xff,

  884.                        (damr_type >> 8) & 0xff,

  885.                        (damr_type >> 0) & 0xff,

  886. 		       damr_size, 

  887.                        (damr_vendor >> 24) & 0xff,

  888.                        (damr_vendor >> 16) & 0xff,

  889.                        (damr_vendor >> 8) & 0xff,

  890.                        (damr_vendor >> 0) & 0xff

  891. 		       );

  892. #endif

  893.                 

  894.                st->time_length=0;//Not possible to get from this info, must count number of AMR frames

  895.                st->codec.sample_rate=8000;

  896.                st->codec.channels=1;

  897.                st->codec.bits_per_sample=16;

  898.                st->codec.bit_rate=0; /*It is not possible to tell this before we have 

  899.                                        an audio frame and even then every frame can be different*/

  900. 	    }

  901. 	    else

  902. 	    {

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

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

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

  906. 

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

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

  909. 

  910.                 /* handle specific s8 codec */

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

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

  913. 

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

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

  916. 

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

  918. 	        case CODEC_ID_PCM_S16BE:

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

  920. 		        st->codec.codec_id = CODEC_ID_PCM_S8;

  921.                     /* fall */

  922. 	        case CODEC_ID_PCM_U8:

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

  924. 		    break;

  925. 	        default:

  926.                     ;

  927. 	        }

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

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

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

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

  932. 	        {

  933. 		    MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };

  934. 		    mov_read_default(c, pb, a);

  935. 	        }

  936.             }

  937.         }

  938.     }

  939. 

  940.     return 0;

  941. }

  942. 

  943. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  944. {

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

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

  947.     int entries, i;

  948. 

  949.     print_atom("stsc", atom);

  950. 

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

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

  953. 

  954.     entries = get_be32(pb);

  955. #ifdef DEBUG

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

  957. #endif

  958.     sc->sample_to_chunk_sz = entries;

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

  960.     if (!sc->sample_to_chunk)

  961.         return -1;

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

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

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

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

  966. #ifdef DEBUG

  967. /*        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); */

  968. #endif

  969.     }

  970.     return 0;

  971. }

  972. 

  973. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  974. {

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

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

  977.     int entries, i;

  978. 

  979.     print_atom("stsz", atom);

  980. 

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

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

  983. 

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

  985.     entries = get_be32(pb);

  986.     sc->sample_count = entries;

  987. #ifdef DEBUG

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

  989. #endif

  990.     if(sc->sample_size)

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

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

  993.     if (!sc->sample_sizes)

  994.         return -1;

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

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

  997. #ifdef DEBUG

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

  999. #endif

  1000.     }

  1001.     return 0;

  1002. }

  1003. 

  1004. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1005. {

  1006.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1007.     //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1008.     int entries, i;

  1009.     int duration=0;

  1010.     int total_sample_count=0;

  1011. 

  1012.     print_atom("stts", atom);

  1013. 

  1014.     get_byte(pb); /* version */

  1015.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1016.     entries = get_be32(pb);

  1017. 

  1018. 

  1019. #ifdef DEBUG

  1020. printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1021. #endif

  1022.     for(i=0; i<entries; i++) {

  1023.         int sample_duration;

  1024.         int sample_count;

  1025. 

  1026.         sample_count=get_be32(pb);

  1027.         sample_duration = get_be32(pb);

  1028. #ifdef DEBUG

  1029.         printf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1030. #endif

  1031.         duration+=sample_duration*sample_count;

  1032.         total_sample_count+=sample_count;

  1033. 

  1034. #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone

  1035. 

  1036.         if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {

  1037.             st->codec.frame_rate_base = sample_duration ? sample_duration : 1;

  1038.             st->codec.frame_rate = c->streams[c->total_streams]->time_scale;

  1039. #ifdef DEBUG

  1040.             printf("VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);

  1041. #endif

  1042.         }

  1043. #endif

  1044.     }

  1045. 

  1046.     if(st->codec.codec_type==CODEC_TYPE_VIDEO)

  1047.     {

  1048.         //Only support constant frame rate. But lets calculate the average. Needed by .mp4-files created with nec e606 3g phone.

  1049.         //Hmm, lets set base to 1

  1050.         st->codec.frame_rate_base=1;

  1051.         st->codec.frame_rate = st->codec.frame_rate_base * c->streams[c->total_streams]->time_scale * total_sample_count / duration;

  1052. #ifdef DEBUG

  1053.         printf("VIDEO FRAME RATE average= %i (tot sample count= %i ,tot dur= %i)\n", st->codec.frame_rate,total_sample_count,duration);

  1054. #endif

  1055.     }

  1056.     return 0;

  1057. }

  1058. 

  1059. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1060. {

  1061.     AVStream *st;

  1062.     MOVStreamContext *sc;

  1063. 

  1064.     print_atom("trak", atom);

  1065. 

  1066.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1067.     if (!st) return -2;

  1068.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1069.     if (!sc) {

  1070. 	av_free(st);

  1071.         return -1;

  1072.     }

  1073. 

  1074.     sc->sample_to_chunk_index = -1;

  1075.     st->priv_data = sc;

  1076.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  1077.     st->time_length = (c->duration * 1000) / c->time_scale; // time in miliseconds

  1078.     c->streams[c->fc->nb_streams-1] = sc;

  1079. 

  1080.     return mov_read_default(c, pb, atom);

  1081. }

  1082. 

  1083. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1084. {

  1085.     AVStream *st;

  1086. 

  1087.     print_atom("tkhd", atom);

  1088. 

  1089.     st = c->fc->streams[c->fc->nb_streams-1];

  1090. 

  1091.     get_byte(pb); /* version */

  1092. 

  1093.     get_byte(pb); get_byte(pb);

  1094.     get_byte(pb); /* flags */

  1095.     /*

  1096.     MOV_TRACK_ENABLED 0x0001

  1097.     MOV_TRACK_IN_MOVIE 0x0002

  1098.     MOV_TRACK_IN_PREVIEW 0x0004

  1099.     MOV_TRACK_IN_POSTER 0x0008

  1100.     */

  1101. 

  1102.     get_be32(pb); /* creation time */

  1103.     get_be32(pb); /* modification time */

  1104.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1105.     get_be32(pb); /* reserved */

  1106.     st->time_length = get_be32(pb) * 1000 / c->time_scale; /* duration */

  1107.     get_be32(pb); /* reserved */

  1108.     get_be32(pb); /* reserved */

  1109. 

  1110.     get_be16(pb); /* layer */

  1111.     get_be16(pb); /* alternate group */

  1112.     get_be16(pb); /* volume */

  1113.     get_be16(pb); /* reserved */

  1114. 

  1115.     url_fskip(pb, 36); /* display matrix */

  1116. 

  1117.     /* those are fixed-point */

  1118.     st->codec.width = get_be32(pb) >> 16; /* track width */

  1119.     st->codec.height = get_be32(pb) >> 16; /* track height */

  1120. 

  1121.     return 0;

  1122. }

  1123. 

  1124. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1125. /* like the files created with Adobe Premiere 5.0, for samples see */

  1126. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1127. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1128. {

  1129.     int err;

  1130. 

  1131. #ifdef DEBUG

  1132.     print_atom("wide", atom);

  1133.     debug_indent++;

  1134. #endif

  1135.     if (atom.size < 8)

  1136.         return 0; /* continue */

  1137.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1138.         url_fskip(pb, atom.size - 4);

  1139.         return 0;

  1140.     }

  1141.     atom.type = get_le32(pb);

  1142.     atom.offset += 8;

  1143.     atom.size -= 8;

  1144.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1145.         url_fskip(pb, atom.size);

  1146.         return 0;

  1147.     }

  1148.     err = mov_read_mdat(c, pb, atom);

  1149. #ifdef DEBUG

  1150.     debug_indent--;

  1151. #endif

  1152.     return err;

  1153. }

  1154. 

  1155. 

  1156. #ifdef CONFIG_ZLIB

  1157. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1158. {

  1159.     return -1;

  1160. }

  1161. 

  1162. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1163. {

  1164.     ByteIOContext ctx;

  1165.     uint8_t *cmov_data;

  1166.     uint8_t *moov_data; /* uncompressed data */

  1167.     long cmov_len, moov_len;

  1168.     int ret;

  1169. 

  1170.     print_atom("cmov", atom);

  1171. 

  1172.     get_be32(pb); /* dcom atom */

  1173.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1174.         return -1;

  1175.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1176.         dprintf("unknown compression for cmov atom !");

  1177.         return -1;

  1178.     }

  1179.     get_be32(pb); /* cmvd atom */

  1180.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1181.         return -1;

  1182.     moov_len = get_be32(pb); /* uncompressed size */

  1183.     cmov_len = atom.size - 6 * 4;

  1184. 

  1185.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1186.     if (!cmov_data)

  1187.         return -1;

  1188.     moov_data = (uint8_t *) av_malloc(moov_len);

  1189.     if (!moov_data) {

  1190.         av_free(cmov_data);

  1191.         return -1;

  1192.     }

  1193.     get_buffer(pb, cmov_data, cmov_len);

  1194.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1195.         return -1;

  1196.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1197.         return -1;

  1198.     ctx.buf_end = ctx.buffer + moov_len;

  1199.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1200.     atom.offset = 0;

  1201.     atom.size = moov_len;

  1202. #ifdef DEBUG

  1203.     { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1204. #endif

  1205.     ret = mov_read_default(c, &ctx, atom);

  1206.     av_free(moov_data);

  1207.     av_free(cmov_data);

  1208. 

  1209.     return ret;

  1210. }

  1211. #endif

  1212. 

  1213. static const MOVParseTableEntry mov_default_parse_table[] = {

  1214. /* mp4 atoms */

  1215. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1216. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1217. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1218. { MKTAG( 'c', 't', 't', 's' ), mov_read_leaf }, /* composition time to sample */

  1219. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1220. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1221. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1222. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1223. { MKTAG( 'e', 'l', 's', 't' ), mov_read_leaf },

  1224. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1225. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1226. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1227. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1228. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1229. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1230. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1231. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1232. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1233. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1234. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1235. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1236. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1237. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1238. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1239. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1240. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1241. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1242. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_default },

  1243. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1244. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorrenson extension ??? */

  1245. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1246. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1247. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1248. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1249. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1250. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1251. { MKTAG( 's', 't', 's', 's' ), mov_read_leaf }, /* sync sample */

  1252. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1253. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1254. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1255. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1256. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1257. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1258. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1259. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1260. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },

  1261. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1262. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },

  1263. /* extra mp4 */

  1264. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1265. /* QT atoms */

  1266. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1267. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1268. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1269. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1270. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1271. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1272. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1273. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1274. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1275. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1276. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1277. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1278. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1279. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1280. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1281. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1282. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1283. #ifdef CONFIG_ZLIB

  1284. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1285. #else

  1286. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1287. #endif

  1288. { 0L, mov_read_leaf }

  1289. };

  1290. 

  1291. static void mov_free_stream_context(MOVStreamContext *sc)

  1292. {

  1293.     if(sc) {

  1294.         av_free(sc->chunk_offsets);

  1295.         av_free(sc->sample_to_chunk);

  1296.         av_free(sc->sample_sizes);

  1297.         av_free(sc->header_data);

  1298.         av_free(sc);

  1299.     }

  1300. }

  1301. 

  1302. static inline uint32_t mov_to_tag(uint8_t *buf)

  1303. {

  1304.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1305. }

  1306. 

  1307. static inline uint32_t to_be32(uint8_t *buf)

  1308. {

  1309.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1310. }

  1311. 

  1312. /* XXX: is it sufficient ? */

  1313. static int mov_probe(AVProbeData *p)

  1314. {

  1315.     unsigned int offset;

  1316.     uint32_t tag;

  1317. 

  1318.     /* check file header */

  1319.     if (p->buf_size <= 12)

  1320.         return 0;

  1321.     offset = 0;

  1322.     for(;;) {

  1323.         /* ignore invalid offset */

  1324.         if ((offset + 8) > (unsigned int)p->buf_size)

  1325.             return 0;

  1326.         tag = mov_to_tag(p->buf + offset + 4);

  1327.         switch(tag) {

  1328.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1329.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1330.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1331.         case MKTAG( 'm', 'd', 'a', 't' ):

  1332.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1333.             return AVPROBE_SCORE_MAX;

  1334.         case MKTAG( 'f', 't', 'y', 'p' ):

  1335.         case MKTAG( 's', 'k', 'i', 'p' ):

  1336.             offset = to_be32(p->buf) + offset;

  1337.             break;

  1338.         default:

  1339.             /* unrecognized tag */

  1340.             return 0;

  1341.         }

  1342.     }

  1343.     return 0;

  1344. }

  1345. 

  1346. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1347. {

  1348.     MOVContext *mov = (MOVContext *) s->priv_data;

  1349.     ByteIOContext *pb = &s->pb;

  1350.     int i, j, nb, err;

  1351.     MOV_atom_t atom = { 0, 0, 0 };

  1352. 

  1353.     mov->fc = s;

  1354.     mov->parse_table = mov_default_parse_table;

  1355. #if 0

  1356.     /* XXX: I think we should auto detect */

  1357.     if(s->iformat->name[1] == 'p')

  1358.         mov->mp4 = 1;

  1359. #endif

  1360.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1361. 	atom.size = url_filesize(url_fileno(pb));

  1362.     else

  1363. 	atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1364. 

  1365. #ifdef DEBUG

  1366.     printf("filesz=%Ld\n", atom.size);

  1367. #endif

  1368. 

  1369.     /* check MOV header */

  1370.     err = mov_read_default(mov, pb, atom);

  1371.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1372. 	fprintf(stderr, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%Ld\n",

  1373. 		err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1374. 	return -1;

  1375.     }

  1376. #ifdef DEBUG

  1377.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1378. #endif

  1379.     /* some cleanup : make sure we are on the mdat atom */

  1380.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1381.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1382. 

  1383.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1384. 

  1385. #ifdef DEBUG

  1386.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  1387. #endif

  1388. 

  1389. #ifdef DEBUG

  1390.     printf("streams= %d\n", s->nb_streams);

  1391. #endif

  1392.     mov->total_streams = nb = s->nb_streams;

  1393. 

  1394. #if 1

  1395.     for(i=0; i<s->nb_streams;) {

  1396.         if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1397.             av_free(s->streams[i]);

  1398.             for(j=i+1; j<s->nb_streams; j++)

  1399.                 s->streams[j-1] = s->streams[j];

  1400.             s->nb_streams--;

  1401.         } else

  1402.             i++;

  1403.     }

  1404.     for(i=0; i<s->nb_streams;i++) {

  1405.         MOVStreamContext *sc;

  1406.         sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1407.         sc->ffindex = i;

  1408.         sc->is_ff_stream = 1;

  1409.     }

  1410. #endif

  1411. #ifdef DEBUG

  1412.     printf("real streams= %d\n", s->nb_streams);

  1413. #endif

  1414.     return 0;

  1415. }

  1416. 

  1417. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1418. /* XXX:remove useless commented code sometime */

  1419. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1420. {

  1421.     MOVContext *mov = (MOVContext *) s->priv_data;

  1422.     MOVStreamContext *sc;

  1423.     int64_t offset = 0x0FFFFFFFFFFFFFFFLL;

  1424.     int i;

  1425.     int size;

  1426.     size = 0x0FFFFFFF;

  1427. 

  1428. #ifdef MOV_SPLIT_CHUNKS

  1429.     if (mov->partial) {

  1430. 

  1431.         int idx;

  1432. 

  1433. 	sc = mov->partial;

  1434. 	idx = sc->sample_to_chunk_index;

  1435. 

  1436.         if (idx < 0) return 0;

  1437. 	size = sc->sample_sizes[sc->current_sample];

  1438. 

  1439.         sc->current_sample++;

  1440.         sc->left_in_chunk--;

  1441. 

  1442.         if (sc->left_in_chunk <= 0)

  1443.             mov->partial = 0;

  1444.         offset = mov->next_chunk_offset;

  1445.         /* extract the sample */

  1446. 

  1447.         goto readchunk;

  1448.     }

  1449. #endif

  1450. 

  1451. again:

  1452.     sc = 0;

  1453.     for(i=0; i<mov->total_streams; i++) {

  1454. 	MOVStreamContext *msc = mov->streams[i];

  1455. 	//printf("MOCHUNK %ld  %d   %p  pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));

  1456.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0

  1457. 	   && (msc->chunk_offsets[msc->next_chunk] < offset)) {

  1458. 	    sc = msc;

  1459. 	    offset = msc->chunk_offsets[msc->next_chunk];

  1460. 	    //printf("SELETED  %Ld  i:%d\n", offset, i);

  1461.         }

  1462.     }

  1463.     if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)

  1464. 	return -1;

  1465. 

  1466.     sc->next_chunk++;

  1467. 

  1468.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1469.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1470.         mov->next_chunk_offset = offset;

  1471.     }

  1472. 

  1473. //printf("chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);

  1474.     if(!sc->is_ff_stream) {

  1475.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1476.         mov->next_chunk_offset = offset;

  1477. 	offset = 0x0FFFFFFFFFFFFFFFLL;

  1478.         goto again;

  1479.     }

  1480. 

  1481.     /* now get the chunk size... */

  1482. 

  1483.     for(i=0; i<mov->total_streams; i++) {

  1484. 	MOVStreamContext *msc = mov->streams[i];

  1485. 	if ((msc->next_chunk < msc->chunk_count)

  1486. 	    && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))

  1487. 	    size = msc->chunk_offsets[msc->next_chunk] - offset;

  1488.     }

  1489. #ifdef MOV_SPLIT_CHUNKS

  1490.     /* split chunks into samples */

  1491.     if (sc->sample_size == 0) {

  1492.         int idx = sc->sample_to_chunk_index;

  1493.         if ((idx + 1 < sc->sample_to_chunk_sz)

  1494. 	    && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))

  1495.            idx++;

  1496.         sc->sample_to_chunk_index = idx;

  1497.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1498. 	    mov->partial = sc;

  1499.             /* we'll have to get those samples before next chunk */

  1500.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1501.             size = sc->sample_sizes[sc->current_sample];

  1502.         }

  1503. 

  1504.         sc->current_sample++;

  1505.     }

  1506. #endif

  1507. 

  1508. readchunk:

  1509. //printf("chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);

  1510.     if(size == 0x0FFFFFFF)

  1511.         size = mov->mdat_size + mov->mdat_offset - offset;

  1512.     if(size < 0)

  1513.         return -1;

  1514.     if(size == 0)

  1515.         return -1;

  1516.     url_fseek(&s->pb, offset, SEEK_SET);

  1517. 

  1518.     //printf("READCHUNK hlen: %d  %d off: %Ld   pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));

  1519.     if (sc->header_len > 0) {

  1520.         av_new_packet(pkt, size + sc->header_len);

  1521.         memcpy(pkt->data, sc->header_data, sc->header_len);

  1522.         get_buffer(&s->pb, pkt->data + sc->header_len, size);

  1523.         /* free header */

  1524.         av_freep(&sc->header_data);

  1525.         sc->header_len = 0;

  1526.     } else {

  1527.         av_new_packet(pkt, size);

  1528.         get_buffer(&s->pb, pkt->data, pkt->size);

  1529.     }

  1530.     pkt->stream_index = sc->ffindex;

  1531. 

  1532. #ifdef DEBUG

  1533. /*

  1534.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  1535.     for(i=0; i<8; i++)

  1536.         printf("%02x ", pkt->data[i]);

  1537.     for(i=0; i<8; i++)

  1538.         printf("%c ", (pkt->data[i]) & 0x7F);

  1539.     puts("");

  1540. */

  1541. #endif

  1542. 

  1543.     mov->next_chunk_offset = offset + size;

  1544. 

  1545.     return 0;

  1546. }

  1547. 

  1548. static int mov_read_close(AVFormatContext *s)

  1549. {

  1550.     int i;

  1551.     MOVContext *mov = (MOVContext *) s->priv_data;

  1552.     for(i=0; i<mov->total_streams; i++)

  1553.         mov_free_stream_context(mov->streams[i]);

  1554.     for(i=0; i<s->nb_streams; i++)

  1555. 	av_freep(&s->streams[i]);

  1556.     /* free color tabs */

  1557.     for(i=0; i<mov->ctab_size; i++)

  1558. 	av_freep(&mov->ctab[i]);

  1559.     av_freep(&mov->ctab);

  1560.     return 0;

  1561. }

  1562. 

  1563. static AVInputFormat mov_iformat = {

  1564.     "mov",

  1565.     "QuickTime/MPEG4 format",

  1566.     sizeof(MOVContext),

  1567.     mov_probe,

  1568.     mov_read_header,

  1569.     mov_read_packet,

  1570.     mov_read_close,

  1571. };

  1572. 

  1573. int mov_init(void)

  1574. {

  1575.     av_register_input_format(&mov_iformat);

  1576.     return 0;

  1577. }