afa0a2347705d55626db0ef186f5cdeb1c69e22f
[libav.git] / libavformat / mov.c
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
20 #include <limits.h>
21
22 #include "avformat.h"
23 #include "avi.h"
24
25 #ifdef CONFIG_ZLIB
26 #include <zlib.h>
27 #endif
28
29 /*
30 * First version by Francois Revol revol@free.fr
31 * Seek function by Gael Chardon gael.dev@4now.net
32 *
33 * Features and limitations:
34 * - reads most of the QT files I have (at least the structure),
35 * the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement.
36 * FIXED, Francois Revol, 07/17/2002
37 * - ffmpeg has nearly none of the usual QuickTime codecs,
38 * although I succesfully dumped raw and mp3 audio tracks off .mov files.
39 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
40 * - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes
41 * (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at
42 * http://mpeg.telecomitalialab.com/faq.htm
43 * - the code is quite ugly... maybe I won't do it recursive next time :-)
44 * - seek is not supported with files that contain edit list
45 *
46 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
47 * when coding this :) (it's a writer anyway)
48 *
49 * Reference documents:
50 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
51 * Apple:
52 * http://developer.apple.com/documentation/QuickTime/QTFF/
53 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
54 * QuickTime is a trademark of Apple (AFAIK :))
55 */
56
57 //#define DEBUG
58 #ifdef DEBUG
59 #include <stdio.h>
60 #include <fcntl.h>
61 #endif
62
63 #include "qtpalette.h"
64
65
66 /* Allows seeking (MOV_SPLIT_CHUNKS should also be defined) */
67 #define MOV_SEEK
68
69 /* allows chunk splitting - should work now... */
70 /* in case you can't read a file, try commenting */
71 #define MOV_SPLIT_CHUNKS
72
73 /* Special handling for movies created with Minolta Dimaxe Xi*/
74 /* this fix should not interfere with other .mov files, but just in case*/
75 #define MOV_MINOLTA_FIX
76
77 /* some streams in QT (and in MP4 mostly) aren't either video nor audio */
78 /* so we first list them as this, then clean up the list of streams we give back, */
79 /* getting rid of these */
80 #define CODEC_TYPE_MOV_OTHER (enum CodecType) 2
81
82 static const CodecTag mov_video_tags[] = {
83 /* { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */
84 /* { CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, *//* Uncompressed RGB */
85 /* { CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */
86 /* { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, *//* YUV with alpha-channel (AVID Uncompressed) */
87 /* Graphics */
88 /* Animation */
89 /* Apple video */
90 /* Kodak Photo CD */
91 { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
92 { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
93 { CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
94 { CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
95 { CODEC_ID_MJPEG, MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
96 /* { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
97 /* { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, *//* embedded gif files as frames (usually one "click to play movie" frame) */
98 /* Sorenson video */
99 { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
100 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
101 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
102 { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
103 { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
104 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
105 { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
106 /* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
107 { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
108 { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
109 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
110 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
111 /* { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */
112 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
113 { CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
114 { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
115 { CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
116 { CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
117 { CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
118 { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
119 { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
120 { CODEC_ID_NONE, 0 },
121 };
122
123 static const CodecTag mov_audio_tags[] = {
124 /* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */
125 { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
126 /* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */
127 { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
128 { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
129 { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
130 { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
131 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
132 { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
133 { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
134
135 { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
136 { CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */
137 { CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */
138 /* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
139 /* MP4 tags */
140 { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
141 /* The standard for mpeg4 audio is still not normalised AFAIK anyway */
142 { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
143 { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
144 { CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */
145 { CODEC_ID_NONE, 0 },
146 };
147
148 /* the QuickTime file format is quite convoluted...
149 * it has lots of index tables, each indexing something in another one...
150 * Here we just use what is needed to read the chunks
151 */
152
153 typedef struct MOV_sample_to_chunk_tbl {
154 long first;
155 long count;
156 long id;
157 } MOV_sample_to_chunk_tbl;
158
159 typedef struct {
160 uint32_t type;
161 int64_t offset;
162 int64_t size; /* total size (excluding the size and type fields) */
163 } MOV_atom_t;
164
165 typedef struct {
166 int seed;
167 int flags;
168 int size;
169 void* clrs;
170 } MOV_ctab_t;
171
172 typedef struct {
173 uint8_t version;
174 uint32_t flags; // 24bit
175
176 /* 0x03 ESDescrTag */
177 uint16_t es_id;
178 #define MP4ODescrTag 0x01
179 #define MP4IODescrTag 0x02
180 #define MP4ESDescrTag 0x03
181 #define MP4DecConfigDescrTag 0x04
182 #define MP4DecSpecificDescrTag 0x05
183 #define MP4SLConfigDescrTag 0x06
184 #define MP4ContentIdDescrTag 0x07
185 #define MP4SupplContentIdDescrTag 0x08
186 #define MP4IPIPtrDescrTag 0x09
187 #define MP4IPMPPtrDescrTag 0x0A
188 #define MP4IPMPDescrTag 0x0B
189 #define MP4RegistrationDescrTag 0x0D
190 #define MP4ESIDIncDescrTag 0x0E
191 #define MP4ESIDRefDescrTag 0x0F
192 #define MP4FileIODescrTag 0x10
193 #define MP4FileODescrTag 0x11
194 #define MP4ExtProfileLevelDescrTag 0x13
195 #define MP4ExtDescrTagsStart 0x80
196 #define MP4ExtDescrTagsEnd 0xFE
197 uint8_t stream_priority;
198
199 /* 0x04 DecConfigDescrTag */
200 uint8_t object_type_id;
201 uint8_t stream_type;
202 /* XXX: really streamType is
203 * only 6bit, followed by:
204 * 1bit upStream
205 * 1bit reserved
206 */
207 uint32_t buffer_size_db; // 24
208 uint32_t max_bitrate;
209 uint32_t avg_bitrate;
210
211 /* 0x05 DecSpecificDescrTag */
212 uint8_t decoder_cfg_len;
213 uint8_t *decoder_cfg;
214
215 /* 0x06 SLConfigDescrTag */
216 uint8_t sl_config_len;
217 uint8_t *sl_config;
218 } MOV_esds_t;
219
220 struct MOVParseTableEntry;
221
222 typedef struct Time2Sample{
223 int count;
224 int duration;
225 }Time2Sample;
226
227 typedef struct MOVStreamContext {
228 int ffindex; /* the ffmpeg stream id */
229 int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */
230 long next_chunk;
231 long chunk_count;
232 int64_t *chunk_offsets;
233 int stts_count;
234 Time2Sample *stts_data;
235 int ctts_count;
236 Time2Sample *ctts_data;
237 int edit_count; /* number of 'edit' (elst atom) */
238 long sample_to_chunk_sz;
239 MOV_sample_to_chunk_tbl *sample_to_chunk;
240 long sample_to_chunk_index;
241 int sample_to_time_index;
242 long sample_to_time_sample;
243 uint64_t sample_to_time_time;
244 int sample_to_ctime_index;
245 int sample_to_ctime_sample;
246 long sample_size;
247 long sample_count;
248 long *sample_sizes;
249 long keyframe_count;
250 long *keyframes;
251 int time_scale;
252 long current_sample;
253 long left_in_chunk; /* how many samples before next chunk */
254 /* specific MPEG4 header which is added at the beginning of the stream */
255 unsigned int header_len;
256 uint8_t *header_data;
257 MOV_esds_t esds;
258 } MOVStreamContext;
259
260 typedef struct MOVContext {
261 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) */
262 AVFormatContext *fc;
263 int time_scale;
264 int duration; /* duration of the longest track */
265 int found_moov; /* when both 'moov' and 'mdat' sections has been found */
266 int found_mdat; /* we suppose we have enough data to read the file */
267 int64_t mdat_size;
268 int64_t mdat_offset;
269 int total_streams;
270 /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
271 * but we need the info to be able to skip data from those streams in the 'mdat' section
272 */
273 MOVStreamContext *streams[MAX_STREAMS];
274
275 int64_t next_chunk_offset;
276 MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */
277 int ctab_size;
278 MOV_ctab_t **ctab; /* color tables */
279 const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
280 /* NOTE: for recursion save to/ restore from local variable! */
281
282 AVPaletteControl palette_control;
283 } MOVContext;
284
285
286 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
287
288 /* those functions parse an atom */
289 /* return code:
290 1: found what I wanted, exit
291 0: continue to parse next atom
292 -1: error occured, exit
293 */
294 typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
295
296 /* links atom IDs to parse functions */
297 typedef struct MOVParseTableEntry {
298 uint32_t type;
299 mov_parse_function func;
300 } MOVParseTableEntry;
301
302 #ifdef DEBUG
303 /*
304 * XXX: static sux, even more in a multithreaded environment...
305 * Avoid them. This is here just to help debugging.
306 */
307 static int debug_indent = 0;
308 void print_atom(const char *str, MOV_atom_t atom)
309 {
310 unsigned int tag, i;
311 tag = (unsigned int) atom.type;
312 i=debug_indent;
313 if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
314 while(i--)
315 av_log(NULL, AV_LOG_DEBUG, "|");
316 av_log(NULL, AV_LOG_DEBUG, "parse:");
317 av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",
318 str, tag & 0xff,
319 (tag >> 8) & 0xff,
320 (tag >> 16) & 0xff,
321 (tag >> 24) & 0xff,
322 (unsigned int)atom.offset,
323 (unsigned int)atom.size);
324 assert((unsigned int)atom.size < 0x7fffffff);// catching errors
325 }
326 #else
327 #define print_atom(a,b)
328 #endif
329
330
331 static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
332 {
333 print_atom("leaf", atom);
334
335 if (atom.size>1)
336 url_fskip(pb, atom.size);
337 /* url_seek(pb, atom_offset+atom.size, SEEK_SET); */
338 return 0;
339 }
340
341 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
342 {
343 int64_t total_size = 0;
344 MOV_atom_t a;
345 int i;
346 int err = 0;
347
348 #ifdef DEBUG
349 print_atom("default", atom);
350 debug_indent++;
351 #endif
352
353 a.offset = atom.offset;
354
355 if (atom.size < 0)
356 atom.size = 0x7fffffffffffffffLL;
357 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
358 a.size = atom.size;
359 a.type=0L;
360 if(atom.size >= 8) {
361 a.size = get_be32(pb);
362 a.type = get_le32(pb);
363 }
364 total_size += 8;
365 a.offset += 8;
366 //av_log(NULL, AV_LOG_DEBUG, "type: %08x %.4s sz: %Lx %Lx %Lx\n", type, (char*)&type, size, atom.size, total_size);
367 if (a.size == 1) { /* 64 bit extended size */
368 a.size = get_be64(pb) - 8;
369 a.offset += 8;
370 total_size += 8;
371 }
372 if (a.size == 0) {
373 a.size = atom.size - total_size;
374 if (a.size <= 8)
375 break;
376 }
377 for (i = 0; c->parse_table[i].type != 0L
378 && c->parse_table[i].type != a.type; i++)
379 /* empty */;
380
381 a.size -= 8;
382
383 if(a.size < 0)
384 break;
385
386 // av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);
387 if (c->parse_table[i].type == 0) { /* skip leaf atoms data */
388 // url_seek(pb, atom.offset+atom.size, SEEK_SET);
389 #ifdef DEBUG
390 print_atom("unknown", a);
391 #endif
392 url_fskip(pb, a.size);
393 } else {
394 #ifdef DEBUG
395 //char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
396 //print_atom(b, type, offset, size);
397 #endif
398 err = (c->parse_table[i].func)(c, pb, a);
399 }
400
401 a.offset += a.size;
402 total_size += a.size;
403 }
404
405 if (!err && total_size < atom.size && atom.size < 0x7ffff) {
406 //av_log(NULL, AV_LOG_DEBUG, "RESET %Ld %Ld err:%d\n", atom.size, total_size, err);
407 url_fskip(pb, atom.size - total_size);
408 }
409
410 #ifdef DEBUG
411 debug_indent--;
412 #endif
413 return err;
414 }
415
416 static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
417 {
418 #if 1
419 url_fskip(pb, atom.size); // for now
420 #else
421 VERY VERY BROKEN, NEVER execute this, needs rewrite
422 unsigned int len;
423 MOV_ctab_t *t;
424 c->ctab = av_realloc(c->ctab, ++c->ctab_size);
425 t = c->ctab[c->ctab_size];
426 t->seed = get_be32(pb);
427 t->flags = get_be16(pb);
428 t->size = get_be16(pb) + 1;
429 len = 2 * t->size * 4;
430 if (len > 0) {
431 t->clrs = av_malloc(len); // 16bit A R G B
432 if (t->clrs)
433 get_buffer(pb, t->clrs, len);
434 }
435 #endif
436
437 return 0;
438 }
439
440 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
441 {
442 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
443 int len = 0;
444 uint32_t type;
445 uint32_t ctype;
446
447 print_atom("hdlr", atom);
448
449 get_byte(pb); /* version */
450 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
451
452 /* component type */
453 ctype = get_le32(pb);
454 type = get_le32(pb); /* component subtype */
455
456 #ifdef DEBUG
457 av_log(NULL, AV_LOG_DEBUG, "ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype);
458 av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
459 #endif
460 #ifdef DEBUG
461 /* XXX: yeah this is ugly... */
462 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
463 if(type == MKTAG('v', 'i', 'd', 'e'))
464 puts("hdlr: vide");
465 else if(type == MKTAG('s', 'o', 'u', 'n'))
466 puts("hdlr: soun");
467 } else if(ctype == 0) { /* MP4 */
468 if(type == MKTAG('v', 'i', 'd', 'e'))
469 puts("hdlr: vide");
470 else if(type == MKTAG('s', 'o', 'u', 'n'))
471 puts("hdlr: soun");
472 else if(type == MKTAG('o', 'd', 's', 'm'))
473 puts("hdlr: odsm");
474 else if(type == MKTAG('s', 'd', 's', 'm'))
475 puts("hdlr: sdsm");
476 } else puts("hdlr: meta");
477 #endif
478
479 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
480 /* helps parsing the string hereafter... */
481 c->mp4 = 0;
482 if(type == MKTAG('v', 'i', 'd', 'e'))
483 st->codec.codec_type = CODEC_TYPE_VIDEO;
484 else if(type == MKTAG('s', 'o', 'u', 'n'))
485 st->codec.codec_type = CODEC_TYPE_AUDIO;
486 } else if(ctype == 0) { /* MP4 */
487 /* helps parsing the string hereafter... */
488 c->mp4 = 1;
489 if(type == MKTAG('v', 'i', 'd', 'e'))
490 st->codec.codec_type = CODEC_TYPE_VIDEO;
491 else if(type == MKTAG('s', 'o', 'u', 'n'))
492 st->codec.codec_type = CODEC_TYPE_AUDIO;
493 }
494 get_be32(pb); /* component manufacture */
495 get_be32(pb); /* component flags */
496 get_be32(pb); /* component flags mask */
497
498 if(atom.size <= 24)
499 return 0; /* nothing left to read */
500 /* XXX: MP4 uses a C string, not a pascal one */
501 /* component name */
502
503 if(c->mp4) {
504 /* .mp4: C string */
505 while(get_byte(pb) && (++len < (atom.size - 24)));
506 } else {
507 /* .mov: PASCAL string */
508 #ifdef DEBUG
509 char* buf;
510 #endif
511 len = get_byte(pb);
512 #ifdef DEBUG
513 buf = (uint8_t*) av_malloc(len+1);
514 if (buf) {
515 get_buffer(pb, buf, len);
516 buf[len] = '\0';
517 av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf);
518 av_free(buf);
519 } else
520 #endif
521 url_fskip(pb, len);
522 }
523
524 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
525 return 0;
526 }
527
528 static int mov_mp4_read_descr_len(ByteIOContext *pb)
529 {
530 int len = 0;
531 int count = 4;
532 while (count--) {
533 int c = get_byte(pb);
534 len = (len << 7) | (c & 0x7f);
535 if (!(c & 0x80))
536 break;
537 }
538 return len;
539 }
540
541 static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)
542 {
543 int len;
544 *tag = get_byte(pb);
545 len = mov_mp4_read_descr_len(pb);
546 #ifdef DEBUG
547 av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
548 #endif
549 return len;
550 }
551
552 static inline unsigned int get_be24(ByteIOContext *s)
553 {
554 unsigned int val;
555 val = get_byte(s) << 16;
556 val |= get_byte(s) << 8;
557 val |= get_byte(s);
558 return val;
559 }
560
561 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
562 {
563 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
564 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
565 int64_t start_pos = url_ftell(pb);
566 int tag, len;
567
568 print_atom("esds", atom);
569
570 /* Well, broken but suffisant for some MP4 streams */
571 get_be32(pb); /* version + flags */
572 len = mov_mp4_read_descr(pb, &tag);
573 if (tag == MP4ESDescrTag) {
574 get_be16(pb); /* ID */
575 get_byte(pb); /* priority */
576 } else
577 get_be16(pb); /* ID */
578
579 len = mov_mp4_read_descr(pb, &tag);
580 if (tag == MP4DecConfigDescrTag) {
581 sc->esds.object_type_id = get_byte(pb);
582 sc->esds.stream_type = get_byte(pb);
583 sc->esds.buffer_size_db = get_be24(pb);
584 sc->esds.max_bitrate = get_be32(pb);
585 sc->esds.avg_bitrate = get_be32(pb);
586
587 len = mov_mp4_read_descr(pb, &tag);
588 //av_log(NULL, AV_LOG_DEBUG, "LEN %d TAG %d m:%d a:%d\n", len, tag, sc->esds.max_bitrate, sc->esds.avg_bitrate);
589 if (tag == MP4DecSpecificDescrTag) {
590 #ifdef DEBUG
591 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
592 #endif
593 st->codec.extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
594 if (st->codec.extradata) {
595 get_buffer(pb, st->codec.extradata, len);
596 st->codec.extradata_size = len;
597 }
598 }
599 }
600 /* in any case, skip garbage */
601 url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
602 return 0;
603 }
604
605 /* this atom contains actual media data */
606 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
607 {
608 print_atom("mdat", atom);
609
610 if(atom.size == 0) /* wrong one (MP4) */
611 return 0;
612 c->found_mdat=1;
613 c->mdat_offset = atom.offset;
614 c->mdat_size = atom.size;
615 if(c->found_moov)
616 return 1; /* found both, just go */
617 url_fskip(pb, atom.size);
618 return 0; /* now go for moov */
619 }
620
621 /* this atom should contain all header atoms */
622 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
623 {
624 int err;
625
626 print_atom("moov", atom);
627
628 err = mov_read_default(c, pb, atom);
629 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
630 /* so we don't parse the whole file if over a network */
631 c->found_moov=1;
632 if(c->found_mdat)
633 return 1; /* found both, just go */
634 return 0; /* now go for mdat */
635 }
636
637
638 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
639 {
640 print_atom("mdhd", atom);
641
642 get_byte(pb); /* version */
643
644 get_byte(pb); get_byte(pb);
645 get_byte(pb); /* flags */
646
647 get_be32(pb); /* creation time */
648 get_be32(pb); /* modification time */
649
650 c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
651
652 #ifdef DEBUG
653 av_log(NULL, AV_LOG_DEBUG, "track[%i].time_scale = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->time_scale); /* time scale */
654 #endif
655 get_be32(pb); /* duration */
656
657 get_be16(pb); /* language */
658 get_be16(pb); /* quality */
659
660 return 0;
661 }
662
663 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
664 {
665 print_atom("mvhd", atom);
666
667 get_byte(pb); /* version */
668 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
669
670 get_be32(pb); /* creation time */
671 get_be32(pb); /* modification time */
672 c->time_scale = get_be32(pb); /* time scale */
673 #ifdef DEBUG
674 av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);
675 #endif
676 c->duration = get_be32(pb); /* duration */
677 get_be32(pb); /* preferred scale */
678
679 get_be16(pb); /* preferred volume */
680
681 url_fskip(pb, 10); /* reserved */
682
683 url_fskip(pb, 36); /* display matrix */
684
685 get_be32(pb); /* preview time */
686 get_be32(pb); /* preview duration */
687 get_be32(pb); /* poster time */
688 get_be32(pb); /* selection time */
689 get_be32(pb); /* selection duration */
690 get_be32(pb); /* current time */
691 get_be32(pb); /* next track ID */
692
693 return 0;
694 }
695
696 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
697 {
698 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
699
700 if((uint64_t)atom.size > (1<<30))
701 return -1;
702
703 // currently SVQ3 decoder expect full STSD header - so let's fake it
704 // this should be fixed and just SMI header should be passed
705 av_free(st->codec.extradata);
706 st->codec.extradata_size = 0x5a + atom.size;
707 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
708
709 if (st->codec.extradata) {
710 strcpy(st->codec.extradata, "SVQ3"); // fake
711 get_buffer(pb, st->codec.extradata + 0x5a, atom.size);
712 //av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld %s\n", atom.size, (char*)st->codec.extradata + 0x5a);
713 } else
714 url_fskip(pb, atom.size);
715
716 return 0;
717 }
718
719 static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
720 {
721 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
722
723 if((uint64_t)atom.size > (1<<30))
724 return -1;
725
726 av_free(st->codec.extradata);
727
728 st->codec.extradata_size = atom.size;
729 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
730
731 if (st->codec.extradata) {
732 get_buffer(pb, st->codec.extradata, atom.size);
733 } else
734 url_fskip(pb, atom.size);
735
736 return 0;
737 }
738
739 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
740 {
741 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
742 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
743 unsigned int i, entries;
744
745 print_atom("stco", atom);
746
747 get_byte(pb); /* version */
748 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
749
750 entries = get_be32(pb);
751
752 if(entries >= UINT_MAX/sizeof(int64_t))
753 return -1;
754
755 sc->chunk_count = entries;
756 sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));
757 if (!sc->chunk_offsets)
758 return -1;
759 if (atom.type == MKTAG('s', 't', 'c', 'o')) {
760 for(i=0; i<entries; i++) {
761 sc->chunk_offsets[i] = get_be32(pb);
762 }
763 } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
764 for(i=0; i<entries; i++) {
765 sc->chunk_offsets[i] = get_be64(pb);
766 }
767 } else
768 return -1;
769 #ifdef DEBUG
770 /*
771 for(i=0; i<entries; i++) {
772 av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
773 }
774 */
775 #endif
776 return 0;
777 }
778
779 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
780 {
781 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
782 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
783 int entries, frames_per_sample;
784 uint32_t format;
785 uint8_t codec_name[32];
786
787 /* for palette traversal */
788 int color_depth;
789 int color_start;
790 int color_count;
791 int color_end;
792 int color_index;
793 int color_dec;
794 int color_greyscale;
795 unsigned char *color_table;
796 int j;
797 unsigned char r, g, b;
798
799 print_atom("stsd", atom);
800
801 get_byte(pb); /* version */
802 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
803
804 entries = get_be32(pb);
805
806 while(entries--) { //Parsing Sample description table
807 enum CodecID id;
808 int size = get_be32(pb); /* size */
809 format = get_le32(pb); /* data format */
810
811 get_be32(pb); /* reserved */
812 get_be16(pb); /* reserved */
813 get_be16(pb); /* index */
814
815 /* for MPEG4: set codec type by looking for it */
816 id = codec_get_id(mov_video_tags, format);
817 if (id >= 0) {
818 AVCodec *codec;
819 codec = avcodec_find_decoder(id);
820 if (codec)
821 st->codec.codec_type = codec->type;
822 }
823 #ifdef DEBUG
824 av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n",
825 size,
826 (format >> 0) & 0xff,
827 (format >> 8) & 0xff,
828 (format >> 16) & 0xff,
829 (format >> 24) & 0xff,
830 st->codec.codec_type);
831 #endif
832 st->codec.codec_tag = format;
833 if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
834 MOV_atom_t a = { 0, 0, 0 };
835 st->codec.codec_id = id;
836 get_be16(pb); /* version */
837 get_be16(pb); /* revision level */
838 get_be32(pb); /* vendor */
839 get_be32(pb); /* temporal quality */
840 get_be32(pb); /* spacial quality */
841 st->codec.width = get_be16(pb); /* width */
842 st->codec.height = get_be16(pb); /* height */
843 #if 1
844 if (st->codec.codec_id == CODEC_ID_MPEG4) {
845 /* in some MPEG4 the width/height are not correct, so
846 we ignore this info */
847 st->codec.width = 0;
848 st->codec.height = 0;
849 }
850 #endif
851 get_be32(pb); /* horiz resolution */
852 get_be32(pb); /* vert resolution */
853 get_be32(pb); /* data size, always 0 */
854 frames_per_sample = get_be16(pb); /* frames per samples */
855 #ifdef DEBUG
856 av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);
857 #endif
858 get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
859 if (codec_name[0] <= 31) {
860 memcpy(st->codec.codec_name, &codec_name[1],codec_name[0]);
861 st->codec.codec_name[codec_name[0]] = 0;
862 }
863
864 st->codec.bits_per_sample = get_be16(pb); /* depth */
865 st->codec.color_table_id = get_be16(pb); /* colortable id */
866
867 /* These are set in mov_read_stts and might already be set!
868 st->codec.frame_rate = 25;
869 st->codec.frame_rate_base = 1;
870 */
871 size -= (16+8*4+2+32+2*2);
872 #if 0
873 while (size >= 8) {
874 MOV_atom_t a;
875 int64_t start_pos;
876
877 a.size = get_be32(pb);
878 a.type = get_le32(pb);
879 size -= 8;
880 #ifdef DEBUG
881 av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",
882 (a.type >> 0) & 0xff,
883 (a.type >> 8) & 0xff,
884 (a.type >> 16) & 0xff,
885 (a.type >> 24) & 0xff,
886 a.size, size);
887 #endif
888 start_pos = url_ftell(pb);
889
890 switch(a.type) {
891 case MKTAG('e', 's', 'd', 's'):
892 {
893 int tag, len;
894 /* Well, broken but suffisant for some MP4 streams */
895 get_be32(pb); /* version + flags */
896 len = mov_mp4_read_descr(pb, &tag);
897 if (tag == 0x03) {
898 /* MP4ESDescrTag */
899 get_be16(pb); /* ID */
900 get_byte(pb); /* priority */
901 len = mov_mp4_read_descr(pb, &tag);
902 if (tag != 0x04)
903 goto fail;
904 /* MP4DecConfigDescrTag */
905 get_byte(pb); /* objectTypeId */
906 get_be32(pb); /* streamType + buffer size */
907 get_be32(pb); /* max bit rate */
908 get_be32(pb); /* avg bit rate */
909 len = mov_mp4_read_descr(pb, &tag);
910 if (tag != 0x05)
911 goto fail;
912 /* MP4DecSpecificDescrTag */
913 #ifdef DEBUG
914 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
915 #endif
916 sc->header_data = av_mallocz(len);
917 if (sc->header_data) {
918 get_buffer(pb, sc->header_data, len);
919 sc->header_len = len;
920 }
921 }
922 /* in any case, skip garbage */
923 }
924 break;
925 default:
926 break;
927 }
928 fail:
929 av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld %d\n", atom.size, url_ftell(pb) - start_pos);
930 if (atom.size > 8) {
931 url_fskip(pb, (atom.size - 8) -
932 ((url_ftell(pb) - start_pos)));
933 size -= atom.size - 8;
934 }
935 }
936 if (size > 0) {
937 /* unknown extension */
938 url_fskip(pb, size);
939 }
940 #else
941
942 /* figure out the palette situation */
943 color_depth = st->codec.bits_per_sample & 0x1F;
944 color_greyscale = st->codec.bits_per_sample & 0x20;
945
946 /* if the depth is 2, 4, or 8 bpp, file is palettized */
947 if ((color_depth == 2) || (color_depth == 4) ||
948 (color_depth == 8)) {
949
950 if (color_greyscale) {
951
952 /* compute the greyscale palette */
953 color_count = 1 << color_depth;
954 color_index = 255;
955 color_dec = 256 / (color_count - 1);
956 for (j = 0; j < color_count; j++) {
957 r = g = b = color_index;
958 c->palette_control.palette[j] =
959 (r << 16) | (g << 8) | (b);
960 color_index -= color_dec;
961 if (color_index < 0)
962 color_index = 0;
963 }
964
965 } else if (st->codec.color_table_id & 0x08) {
966
967 /* if flag bit 3 is set, use the default palette */
968 color_count = 1 << color_depth;
969 if (color_depth == 2)
970 color_table = ff_qt_default_palette_4;
971 else if (color_depth == 4)
972 color_table = ff_qt_default_palette_16;
973 else
974 color_table = ff_qt_default_palette_256;
975
976 for (j = 0; j < color_count; j++) {
977 r = color_table[j * 4 + 0];
978 g = color_table[j * 4 + 1];
979 b = color_table[j * 4 + 2];
980 c->palette_control.palette[j] =
981 (r << 16) | (g << 8) | (b);
982 }
983
984 } else {
985
986 /* load the palette from the file */
987 color_start = get_be32(pb);
988 color_count = get_be16(pb);
989 color_end = get_be16(pb);
990 for (j = color_start; j <= color_end; j++) {
991 /* each R, G, or B component is 16 bits;
992 * only use the top 8 bits; skip alpha bytes
993 * up front */
994 get_byte(pb);
995 get_byte(pb);
996 r = get_byte(pb);
997 get_byte(pb);
998 g = get_byte(pb);
999 get_byte(pb);
1000 b = get_byte(pb);
1001 get_byte(pb);
1002 c->palette_control.palette[j] =
1003 (r << 16) | (g << 8) | (b);
1004 }
1005 }
1006
1007 st->codec.palctrl = &c->palette_control;
1008 st->codec.palctrl->palette_changed = 1;
1009 } else
1010 st->codec.palctrl = NULL;
1011
1012 a.size = size;
1013 mov_read_default(c, pb, a);
1014 #endif
1015 } else {
1016 st->codec.codec_id = codec_get_id(mov_audio_tags, format);
1017 if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244
1018 {
1019 #ifdef DEBUG
1020 av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");
1021 #endif
1022 get_be32(pb);get_be32(pb); //Reserved_8
1023 get_be16(pb);//Reserved_2
1024 get_be16(pb);//Reserved_2
1025 get_be32(pb);//Reserved_4
1026 get_be16(pb);//TimeScale
1027 get_be16(pb);//Reserved_2
1028
1029 //AMRSpecificBox.(10 bytes)
1030
1031 get_be32(pb); //size
1032 get_be32(pb); //type=='damr'
1033 get_be32(pb); //vendor
1034 get_byte(pb); //decoder version
1035 get_be16(pb); //mode_set
1036 get_byte(pb); //mode_change_period
1037 get_byte(pb); //frames_per_sample
1038
1039 st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames
1040 if(st->codec.codec_id==CODEC_ID_AMR_NB)
1041 {
1042 st->codec.sample_rate=8000;
1043 st->codec.channels=1;
1044 }
1045 else //AMR-WB
1046 {
1047 st->codec.sample_rate=16000;
1048 st->codec.channels=1;
1049 }
1050 st->codec.bits_per_sample=16;
1051 st->codec.bit_rate=0; /*It is not possible to tell this before we have
1052 an audio frame and even then every frame can be different*/
1053 }
1054 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))
1055 {
1056 //This is some stuff for the hint track, lets ignore it!
1057 //Do some mp4 auto detect.
1058 c->mp4=1;
1059 size-=(16);
1060 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
1061 }
1062 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))
1063 {
1064 MOV_atom_t a;
1065 int mp4_version;
1066
1067 /* Handle mp4 audio tag */
1068 mp4_version=get_be16(pb);/*version*/
1069 get_be16(pb); /*revesion*/
1070 get_be32(pb);
1071 st->codec.channels = get_be16(pb); /* channels */
1072 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */
1073 get_be32(pb);
1074 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */
1075 get_be16(pb);
1076 c->mp4=1;
1077
1078 if(mp4_version==1)
1079 {
1080 url_fskip(pb,16);
1081 a.size=size-(16+20+16);
1082 }
1083 else
1084 a.size=size-(16+20);
1085
1086 a.offset=url_ftell(pb);
1087
1088 mov_read_default(c, pb, a);
1089
1090 /* Get correct sample rate from extradata */
1091 if(st->codec.extradata_size) {
1092 const int samplerate_table[] = {
1093 96000, 88200, 64000, 48000, 44100, 32000,
1094 24000, 22050, 16000, 12000, 11025, 8000,
1095 7350, 0, 0, 0
1096 };
1097 unsigned char *px = st->codec.extradata;
1098 // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels
1099 int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);
1100 st->codec.sample_rate = samplerate_table[samplerate_index];
1101 st->codec.channels = (px[1] >> 3) & 15;
1102 }
1103 }
1104 else if(size>=(16+20))
1105 {//16 bytes read, reading atleast 20 more
1106 uint16_t version;
1107 #ifdef DEBUG
1108 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);
1109 #endif
1110 version = get_be16(pb); /* version */
1111 get_be16(pb); /* revision level */
1112 get_be32(pb); /* vendor */
1113
1114 st->codec.channels = get_be16(pb); /* channel count */
1115 st->codec.bits_per_sample = get_be16(pb); /* sample size */
1116
1117 /* handle specific s8 codec */
1118 get_be16(pb); /* compression id = 0*/
1119 get_be16(pb); /* packet size = 0 */
1120
1121 st->codec.sample_rate = ((get_be32(pb) >> 16));
1122 //av_log(NULL, AV_LOG_DEBUG, "CODECID %d %d %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
1123
1124 switch (st->codec.codec_id) {
1125 case CODEC_ID_PCM_S16BE:
1126 if (st->codec.bits_per_sample == 8)
1127 st->codec.codec_id = CODEC_ID_PCM_S8;
1128 /* fall */
1129 case CODEC_ID_PCM_U8:
1130 st->codec.bit_rate = st->codec.sample_rate * 8;
1131 break;
1132 default:
1133 ;
1134 }
1135
1136 //Read QT version 1 fields. In version 0 theese dont exist
1137 #ifdef DEBUG
1138 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);
1139 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));
1140 #endif
1141 if((version==1) && size>=(16+20+16))
1142 {
1143 get_be32(pb); /* samples per packet */
1144 get_be32(pb); /* bytes per packet */
1145 get_be32(pb); /* bytes per frame */
1146 get_be32(pb); /* bytes per sample */
1147 if(size>(16+20+16))
1148 {
1149 //Optional, additional atom-based fields
1150 MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
1151 #ifdef DEBUG
1152 av_log(NULL, AV_LOG_DEBUG, "offest=0x%X, sizeleft=%d=0x%x,format=%c%c%c%c\n",(int)url_ftell(pb),size - (16 + 20 + 16 ),size - (16 + 20 + 16 ),
1153 (format >> 0) & 0xff,
1154 (format >> 8) & 0xff,
1155 (format >> 16) & 0xff,
1156 (format >> 24) & 0xff);
1157 #endif
1158 mov_read_default(c, pb, a);
1159 }
1160 }
1161 else
1162 {
1163 //We should be down to 0 bytes here, but lets make sure.
1164 size-=(16+20);
1165 #ifdef DEBUG
1166 if(size>0)
1167 av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));
1168 #endif
1169 url_fskip(pb, size);
1170 }
1171 }
1172 else
1173 {
1174 size-=16;
1175 //Unknown size, but lets do our best and skip the rest.
1176 #ifdef DEBUG
1177 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);
1178 #endif
1179 url_fskip(pb, size);
1180 }
1181 }
1182 }
1183
1184 return 0;
1185 }
1186
1187 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1188 {
1189 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1190 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1191 unsigned int i, entries;
1192
1193 print_atom("stsc", atom);
1194
1195 get_byte(pb); /* version */
1196 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1197
1198 entries = get_be32(pb);
1199
1200 if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))
1201 return -1;
1202
1203 #ifdef DEBUG
1204 av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1205 #endif
1206 sc->sample_to_chunk_sz = entries;
1207 sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
1208 if (!sc->sample_to_chunk)
1209 return -1;
1210 for(i=0; i<entries; i++) {
1211 sc->sample_to_chunk[i].first = get_be32(pb);
1212 sc->sample_to_chunk[i].count = get_be32(pb);
1213 sc->sample_to_chunk[i].id = get_be32(pb);
1214 #ifdef DEBUG
1215 /* av_log(NULL, AV_LOG_DEBUG, "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); */
1216 #endif
1217 }
1218 return 0;
1219 }
1220
1221 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1222 {
1223 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1224 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1225 unsigned int i, entries;
1226
1227 print_atom("stss", atom);
1228
1229 get_byte(pb); /* version */
1230 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1231
1232 entries = get_be32(pb);
1233
1234 if(entries >= UINT_MAX / sizeof(long))
1235 return -1;
1236
1237 sc->keyframe_count = entries;
1238 #ifdef DEBUG
1239 av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);
1240 #endif
1241 sc->keyframes = (long*) av_malloc(entries * sizeof(long));
1242 if (!sc->keyframes)
1243 return -1;
1244 for(i=0; i<entries; i++) {
1245 sc->keyframes[i] = get_be32(pb);
1246 #ifdef DEBUG
1247 /* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
1248 #endif
1249 }
1250 return 0;
1251 }
1252
1253 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1254 {
1255 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1256 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1257 unsigned int i, entries;
1258
1259 print_atom("stsz", atom);
1260
1261 get_byte(pb); /* version */
1262 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1263
1264 sc->sample_size = get_be32(pb);
1265 entries = get_be32(pb);
1266 if(entries >= UINT_MAX / sizeof(long))
1267 return -1;
1268
1269 sc->sample_count = entries;
1270 #ifdef DEBUG
1271 av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
1272 #endif
1273 if(sc->sample_size)
1274 return 0; /* there isn't any table following */
1275 sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));
1276 if (!sc->sample_sizes)
1277 return -1;
1278 for(i=0; i<entries; i++) {
1279 sc->sample_sizes[i] = get_be32(pb);
1280 #ifdef DEBUG
1281 av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);
1282 #endif
1283 }
1284 return 0;
1285 }
1286
1287 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1288 {
1289 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1290 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1291 unsigned int i, entries;
1292 int64_t duration=0;
1293 int64_t total_sample_count=0;
1294
1295 print_atom("stts", atom);
1296
1297 get_byte(pb); /* version */
1298 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1299 entries = get_be32(pb);
1300 if(entries >= UINT_MAX / sizeof(Time2Sample))
1301 return -1;
1302
1303 c->streams[c->fc->nb_streams-1]->stts_count = entries;
1304 c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));
1305
1306 #ifdef DEBUG
1307 av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1308 #endif
1309 for(i=0; i<entries; i++) {
1310 int sample_duration;
1311 int sample_count;
1312
1313 sample_count=get_be32(pb);
1314 sample_duration = get_be32(pb);
1315 c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;
1316 c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;
1317 #ifdef DEBUG
1318 av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1319 #endif
1320 duration+=sample_duration*sample_count;
1321 total_sample_count+=sample_count;
1322
1323 #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone
1324
1325 if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {
1326 st->codec.frame_rate_base = sample_duration ? sample_duration : 1;
1327 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1328 #ifdef DEBUG
1329 av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);
1330 #endif
1331 }
1332 #endif
1333 }
1334
1335 /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/
1336 if(duration>0)
1337 {
1338 av_reduce(
1339 &st->codec.frame_rate,
1340 &st->codec.frame_rate_base,
1341 c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,
1342 duration,
1343 INT_MAX
1344 );
1345
1346 #ifdef DEBUG
1347 av_log(NULL, AV_LOG_DEBUG, "FRAME RATE average (video or audio)= %f (tot sample count= %i ,tot dur= %i timescale=%d)\n", (float)st->codec.frame_rate/st->codec.frame_rate_base,total_sample_count,duration,c->streams[c->fc->nb_streams-1]->time_scale);
1348 #endif
1349 }
1350 else
1351 {
1352 st->codec.frame_rate_base = 1;
1353 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1354 }
1355 return 0;
1356 }
1357
1358 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1359 {
1360 // AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1361 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1362 unsigned int i, entries;
1363
1364 print_atom("ctts", atom);
1365
1366 get_byte(pb); /* version */
1367 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1368 entries = get_be32(pb);
1369 if(entries >= UINT_MAX / sizeof(Time2Sample))
1370 return -1;
1371
1372 c->streams[c->fc->nb_streams-1]->ctts_count = entries;
1373 c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));
1374
1375 // #ifdef DEBUG
1376 av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1377 // #endif
1378 for(i=0; i<entries; i++) {
1379 c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);
1380 c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);
1381 }
1382 return 0;
1383 }
1384
1385 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1386 {
1387 AVStream *st;
1388 MOVStreamContext *sc;
1389
1390 print_atom("trak", atom);
1391
1392 st = av_new_stream(c->fc, c->fc->nb_streams);
1393 if (!st) return -2;
1394 sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
1395 if (!sc) {
1396 av_free(st);
1397 return -1;
1398 }
1399
1400 sc->sample_to_chunk_index = -1;
1401 st->priv_data = sc;
1402 st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
1403 st->start_time = 0; /* XXX: check */
1404 st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;
1405 c->streams[c->fc->nb_streams-1] = sc;
1406
1407 return mov_read_default(c, pb, atom);
1408 }
1409
1410 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1411 {
1412 AVStream *st;
1413
1414 print_atom("tkhd", atom);
1415
1416 st = c->fc->streams[c->fc->nb_streams-1];
1417
1418 get_byte(pb); /* version */
1419
1420 get_byte(pb); get_byte(pb);
1421 get_byte(pb); /* flags */
1422 /*
1423 MOV_TRACK_ENABLED 0x0001
1424 MOV_TRACK_IN_MOVIE 0x0002
1425 MOV_TRACK_IN_PREVIEW 0x0004
1426 MOV_TRACK_IN_POSTER 0x0008
1427 */
1428
1429 get_be32(pb); /* creation time */
1430 get_be32(pb); /* modification time */
1431 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1432 get_be32(pb); /* reserved */
1433 st->start_time = 0; /* check */
1434 st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */
1435 get_be32(pb); /* reserved */
1436 get_be32(pb); /* reserved */
1437
1438 get_be16(pb); /* layer */
1439 get_be16(pb); /* alternate group */
1440 get_be16(pb); /* volume */
1441 get_be16(pb); /* reserved */
1442
1443 url_fskip(pb, 36); /* display matrix */
1444
1445 /* those are fixed-point */
1446 st->codec.width = get_be32(pb) >> 16; /* track width */
1447 st->codec.height = get_be32(pb) >> 16; /* track height */
1448
1449 return 0;
1450 }
1451
1452 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1453 /* like the files created with Adobe Premiere 5.0, for samples see */
1454 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1455 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1456 {
1457 int err;
1458
1459 #ifdef DEBUG
1460 print_atom("wide", atom);
1461 debug_indent++;
1462 #endif
1463 if (atom.size < 8)
1464 return 0; /* continue */
1465 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1466 url_fskip(pb, atom.size - 4);
1467 return 0;
1468 }
1469 atom.type = get_le32(pb);
1470 atom.offset += 8;
1471 atom.size -= 8;
1472 if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1473 url_fskip(pb, atom.size);
1474 return 0;
1475 }
1476 err = mov_read_mdat(c, pb, atom);
1477 #ifdef DEBUG
1478 debug_indent--;
1479 #endif
1480 return err;
1481 }
1482
1483
1484 #ifdef CONFIG_ZLIB
1485 static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
1486 {
1487 return -1;
1488 }
1489
1490 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1491 {
1492 ByteIOContext ctx;
1493 uint8_t *cmov_data;
1494 uint8_t *moov_data; /* uncompressed data */
1495 long cmov_len, moov_len;
1496 int ret;
1497
1498 print_atom("cmov", atom);
1499
1500 get_be32(pb); /* dcom atom */
1501 if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1502 return -1;
1503 if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1504 av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");
1505 return -1;
1506 }
1507 get_be32(pb); /* cmvd atom */
1508 if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1509 return -1;
1510 moov_len = get_be32(pb); /* uncompressed size */
1511 cmov_len = atom.size - 6 * 4;
1512
1513 cmov_data = (uint8_t *) av_malloc(cmov_len);
1514 if (!cmov_data)
1515 return -1;
1516 moov_data = (uint8_t *) av_malloc(moov_len);
1517 if (!moov_data) {
1518 av_free(cmov_data);
1519 return -1;
1520 }
1521 get_buffer(pb, cmov_data, cmov_len);
1522 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1523 return -1;
1524 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)
1525 return -1;
1526 ctx.buf_end = ctx.buffer + moov_len;
1527 atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1528 atom.offset = 0;
1529 atom.size = moov_len;
1530 #ifdef DEBUG
1531 { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1532 #endif
1533 ret = mov_read_default(c, &ctx, atom);
1534 av_free(moov_data);
1535 av_free(cmov_data);
1536
1537 return ret;
1538 }
1539 #endif
1540
1541 /* edit list atom */
1542 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1543 {
1544 int i, edit_count;
1545 print_atom("elst", atom);
1546
1547 get_byte(pb); /* version */
1548 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1549 edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */
1550
1551 for(i=0; i<edit_count; i++){
1552 get_be32(pb); /* Track duration */
1553 get_be32(pb); /* Media time */
1554 get_be32(pb); /* Media rate */
1555 }
1556 #ifdef DEBUG
1557 av_log(NULL, AV_LOG_DEBUG, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count);
1558 #endif
1559 return 0;
1560 }
1561
1562 static const MOVParseTableEntry mov_default_parse_table[] = {
1563 /* mp4 atoms */
1564 { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1565 { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
1566 { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
1567 { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1568 { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
1569 { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
1570 { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
1571 { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1572 { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1573 { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
1574 { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1575 { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
1576 { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
1577 { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
1578 { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1579 { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1580 { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1581 { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1582 { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1583 { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
1584 { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
1585 { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
1586 { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
1587 { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1588 { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
1589 { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
1590 { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
1591 { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
1592 { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
1593 { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1594 { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },
1595 { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1596 { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1597 { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
1598 { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1599 { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1600 { MKTAG( 's', 't', 's', 'h' ), mov_read_default },
1601 { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1602 { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1603 { MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1604 { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1605 { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1606 { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
1607 { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
1608 { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
1609 { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
1610 { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },
1611 { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
1612 { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },
1613 /* extra mp4 */
1614 { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
1615 /* QT atoms */
1616 { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
1617 { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
1618 { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
1619 { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
1620 { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1621 { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
1622 { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
1623 { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
1624 { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
1625 { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
1626 { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
1627 { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
1628 { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
1629 { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
1630 { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
1631 { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1632 //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
1633 #ifdef CONFIG_ZLIB
1634 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1635 #else
1636 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
1637 #endif
1638 { 0L, mov_read_leaf }
1639 };
1640
1641 static void mov_free_stream_context(MOVStreamContext *sc)
1642 {
1643 if(sc) {
1644 av_freep(&sc->chunk_offsets);
1645 av_freep(&sc->sample_to_chunk);
1646 av_freep(&sc->sample_sizes);
1647 av_freep(&sc->keyframes);
1648 av_freep(&sc->header_data);
1649 av_freep(&sc->stts_data);
1650 av_freep(&sc->ctts_data);
1651 av_freep(&sc);
1652 }
1653 }
1654
1655 static inline uint32_t mov_to_tag(uint8_t *buf)
1656 {
1657 return MKTAG(buf[0], buf[1], buf[2], buf[3]);
1658 }
1659
1660 static inline uint32_t to_be32(uint8_t *buf)
1661 {
1662 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
1663 }
1664
1665 /* XXX: is it sufficient ? */
1666 static int mov_probe(AVProbeData *p)
1667 {
1668 unsigned int offset;
1669 uint32_t tag;
1670 int score = 0;
1671
1672 /* check file header */
1673 if (p->buf_size <= 12)
1674 return 0;
1675 offset = 0;
1676 for(;;) {
1677 /* ignore invalid offset */
1678 if ((offset + 8) > (unsigned int)p->buf_size)
1679 return score;
1680 tag = mov_to_tag(p->buf + offset + 4);
1681 switch(tag) {
1682 /* check for obvious tags */
1683 case MKTAG( 'm', 'o', 'o', 'v' ):
1684 case MKTAG( 'm', 'd', 'a', 't' ):
1685 case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1686 case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1687 return AVPROBE_SCORE_MAX;
1688 /* those are more common words, so rate then a bit less */
1689 case MKTAG( 'w', 'i', 'd', 'e' ):
1690 case MKTAG( 'f', 'r', 'e', 'e' ):
1691 case MKTAG( 'j', 'u', 'n', 'k' ):
1692 case MKTAG( 'p', 'i', 'c', 't' ):
1693 return AVPROBE_SCORE_MAX - 5;
1694 case MKTAG( 'f', 't', 'y', 'p' ):
1695 case MKTAG( 's', 'k', 'i', 'p' ):
1696 offset = to_be32(p->buf+offset) + offset;
1697 /* if we only find those cause probedata is too small at least rate them */
1698 score = AVPROBE_SCORE_MAX - 50;
1699 break;
1700 default:
1701 /* unrecognized tag */
1702 return score;
1703 }
1704 }
1705 return score;
1706 }
1707
1708 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1709 {
1710 MOVContext *mov = (MOVContext *) s->priv_data;
1711 ByteIOContext *pb = &s->pb;
1712 int i, j, nb, err;
1713 MOV_atom_t atom = { 0, 0, 0 };
1714
1715 mov->fc = s;
1716 mov->parse_table = mov_default_parse_table;
1717 #if 0
1718 /* XXX: I think we should auto detect */
1719 if(s->iformat->name[1] == 'p')
1720 mov->mp4 = 1;
1721 #endif
1722 if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1723 atom.size = url_filesize(url_fileno(pb));
1724 else
1725 atom.size = 0x7FFFFFFFFFFFFFFFLL;
1726
1727 #ifdef DEBUG
1728 av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);
1729 #endif
1730
1731 /* check MOV header */
1732 err = mov_read_default(mov, pb, atom);
1733 if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1734 av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",
1735 err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1736 return -1;
1737 }
1738 #ifdef DEBUG
1739 av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1740 #endif
1741 /* some cleanup : make sure we are on the mdat atom */
1742 if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
1743 url_fseek(pb, mov->mdat_offset, SEEK_SET);
1744
1745 mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
1746
1747 #ifdef DEBUG
1748 av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));
1749 #endif
1750
1751 #ifdef DEBUG
1752 av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);
1753 #endif
1754 mov->total_streams = nb = s->nb_streams;
1755
1756 #if 1
1757 for(i=0; i<s->nb_streams;) {
1758 if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
1759 av_free(s->streams[i]);
1760 for(j=i+1; j<s->nb_streams; j++)
1761 s->streams[j-1] = s->streams[j];
1762 s->nb_streams--;
1763 } else
1764 i++;
1765 }
1766 for(i=0; i<s->nb_streams;i++) {
1767 MOVStreamContext *sc;
1768 sc = (MOVStreamContext *)s->streams[i]->priv_data;
1769 sc->ffindex = i;
1770 sc->is_ff_stream = 1;
1771 }
1772 #endif
1773 #ifdef DEBUG
1774 av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);
1775 #endif
1776 return 0;
1777 }
1778
1779 /* Yes, this is ugly... I didn't write the specs of QT :p */
1780 /* XXX:remove useless commented code sometime */
1781 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1782 {
1783 MOVContext *mov = (MOVContext *) s->priv_data;
1784 MOVStreamContext *sc;
1785 int64_t offset = 0x0FFFFFFFFFFFFFFFLL;
1786 int i, a, b, m;
1787 int size;
1788 int idx;
1789 size = 0x0FFFFFFF;
1790
1791 #ifdef MOV_SPLIT_CHUNKS
1792 if (mov->partial) {
1793 sc = mov->partial;
1794 idx = sc->sample_to_chunk_index;
1795
1796 if (idx < 0) return 0;
1797 #ifdef DEBUG
1798 fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);
1799 #endif
1800 // sample_size is not always correct for audio. Quicktime ignores this value and
1801 // computes it differently.
1802 if(s->streams[sc->ffindex]->codec.codec_type == CODEC_TYPE_VIDEO)
1803 size = sc->sample_size?sc->sample_size:sc->sample_sizes[sc->current_sample];
1804 sc->current_sample++;
1805 sc->left_in_chunk--;
1806
1807 if (sc->left_in_chunk <= 0)
1808 mov->partial = 0;
1809 offset = mov->next_chunk_offset;
1810 /* extract the sample */
1811
1812 goto readchunk;
1813 }
1814 #endif
1815
1816 again:
1817 sc = 0;
1818 for(i=0; i<mov->total_streams; i++) {
1819 MOVStreamContext *msc = mov->streams[i];
1820 //av_log(NULL, AV_LOG_DEBUG, "MOCHUNK %ld %d %p pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));
1821 if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0
1822 && (msc->chunk_offsets[msc->next_chunk] < offset)) {
1823 sc = msc;
1824 offset = msc->chunk_offsets[msc->next_chunk];
1825 //av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
1826 }
1827 }
1828 if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)
1829 return -1;
1830
1831 sc->next_chunk++;
1832
1833 if(mov->next_chunk_offset < offset) { /* some meta data */
1834 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1835 mov->next_chunk_offset = offset;
1836 }
1837
1838 //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
1839 if(!sc->is_ff_stream || s->streams[sc->ffindex]->discard) {
1840 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1841 mov->next_chunk_offset = offset;
1842 offset = 0x0FFFFFFFFFFFFFFFLL;
1843 goto again;
1844 }
1845
1846 /* now get the chunk size... */
1847
1848 for(i=0; i<mov->total_streams; i++) {
1849 MOVStreamContext *msc = mov->streams[i];
1850 if ((msc->next_chunk < msc->chunk_count)
1851 && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))
1852 size = msc->chunk_offsets[msc->next_chunk] - offset;
1853 }
1854
1855 #ifdef MOV_MINOLTA_FIX
1856 //Make sure that size is according to sample_size (Needed by .mov files
1857 //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
1858 //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
1859 //but I have no such movies
1860 if (sc->sample_size > 0) {
1861 int foundsize=0;
1862 for(i=0; i<(sc->sample_to_chunk_sz); i++) {
1863 if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )
1864 {
1865 // I can't figure out why for PCM audio sample_size is always 1
1866 // (it should actually be channels*bits_per_second/8) but it is.
1867 AVCodecContext* cod = &s->streams[sc->ffindex]->codec;
1868 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))
1869 foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
1870 else
1871 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;
1872 }
1873 #ifdef DEBUG
1874 av_log(NULL, AV_LOG_DEBUG, "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);
1875 #endif
1876 }
1877 if( (foundsize>0) && (foundsize<size) )
1878 {
1879 #ifdef DEBUG
1880 /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/
1881 #endif
1882 size=foundsize;
1883 }
1884 }
1885 #endif //MOV_MINOLTA_FIX
1886
1887 #ifdef MOV_SPLIT_CHUNKS
1888 /* split chunks into samples */
1889 if (s->streams[sc->ffindex]->codec.codec_type == CODEC_TYPE_VIDEO) {
1890 // This does not support split audio, as the sample_size is often not correct
1891 idx = sc->sample_to_chunk_index;
1892 if ((idx + 1 < sc->sample_to_chunk_sz)
1893 && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))
1894 idx++;
1895 sc->sample_to_chunk_index = idx;
1896 if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {
1897 mov->partial = sc;
1898 /* we'll have to get those samples before next chunk */
1899 sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
1900 size = sc->sample_size?sc->sample_size:sc->sample_sizes[sc->current_sample];
1901 }
1902
1903 sc->current_sample++;
1904 }
1905 #endif
1906
1907 readchunk:
1908 #ifdef DEBUG
1909 av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);
1910 #endif
1911 if(size == 0x0FFFFFFF)
1912 size = mov->mdat_size + mov->mdat_offset - offset;
1913 if(size < 0)
1914 return -1;
1915 if(size == 0)
1916 return -1;
1917 url_fseek(&s->pb, offset, SEEK_SET);
1918
1919 //av_log(NULL, AV_LOG_DEBUG, "READCHUNK hlen: %d %d off: %Ld pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));
1920 if (sc->header_len > 0) {
1921 av_new_packet(pkt, size + sc->header_len);
1922 memcpy(pkt->data, sc->header_data, sc->header_len);
1923 get_buffer(&s->pb, pkt->data + sc->header_len, size);
1924 /* free header */
1925 av_freep(&sc->header_data);
1926 sc->header_len = 0;
1927 } else {
1928 av_new_packet(pkt, size);
1929 get_buffer(&s->pb, pkt->data, pkt->size);
1930 }
1931 pkt->stream_index = sc->ffindex;
1932
1933 // If the keyframes table exists, mark any samples that are in the table as key frames.
1934 // If no table exists, treat very sample as a key frame.
1935 if (sc->keyframes) {
1936 a = 0;
1937 b = sc->keyframe_count - 1;
1938
1939 while (a < b) {
1940 m = (a + b + 1) >> 1;
1941 if (sc->keyframes[m] > sc->current_sample) {
1942 b = m - 1;
1943 } else {
1944 a = m;
1945 }
1946 }
1947
1948 if (sc->keyframes[a] == sc->current_sample)
1949 pkt->flags |= PKT_FLAG_KEY;
1950 }
1951 else
1952 pkt->flags |= PKT_FLAG_KEY;
1953
1954 #ifdef DEBUG
1955 /*
1956 av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);
1957 for(i=0; i<8; i++)
1958 av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);
1959 for(i=0; i<8; i++)
1960 av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);
1961 av_log(NULL, AV_LOG_DEBUG, "\n");
1962 */
1963 #endif
1964
1965 mov->next_chunk_offset = offset + size;
1966
1967 /* find the corresponding dts */
1968 if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {
1969 unsigned int count;
1970 uint64_t dts, pts;
1971 unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;
1972 count = sc->stts_data[sc->sample_to_time_index].count;
1973 if ((sc->sample_to_time_sample + count) < sc->current_sample) {
1974 sc->sample_to_time_sample += count;
1975 sc->sample_to_time_time += count*duration;
1976 sc->sample_to_time_index ++;
1977 duration = sc->stts_data[sc->sample_to_time_index].duration;
1978 }
1979 dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;
1980 /* find the corresponding pts */
1981 if (sc->sample_to_ctime_index < sc->ctts_count) {
1982 int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
1983 int count = sc->ctts_data[sc->sample_to_ctime_index].count;
1984
1985 if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {
1986 sc->sample_to_ctime_sample += count;
1987 sc->sample_to_ctime_index ++;
1988 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
1989 }
1990 pts = dts + duration;
1991 }else
1992 pts = dts;
1993 pkt->pts = av_rescale( pts,
1994 (int64_t)s->streams[sc->ffindex]->time_base.den,
1995 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
1996 pkt->dts = av_rescale( dts,
1997 (int64_t)s->streams[sc->ffindex]->time_base.den,
1998 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
1999 #ifdef DEBUG
2000 av_log(NULL, AV_LOG_DEBUG, "stream #%d smp #%ld dts = %lld pts = %lld (smp:%ld time:%lld idx:%d ent:%d count:%d dur:%d)\n"
2001 , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
2002 , sc->sample_to_time_sample
2003 , sc->sample_to_time_time
2004 , sc->sample_to_time_index
2005 , sc->stts_count
2006 , count
2007 , duration);
2008 #endif
2009 }
2010
2011 return 0;
2012 }
2013
2014 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2015 /**
2016 * Seek method based on the one described in the Appendix C of QTFileFormat.pdf
2017 */
2018 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2019 {
2020 MOVContext* mov = (MOVContext *) s->priv_data;
2021 MOVStreamContext* sc;
2022 int32_t i, a, b, m;
2023 int64_t sample_time;
2024 int64_t start_time;
2025 int32_t seek_sample, sample;
2026 int32_t duration;
2027 int32_t count;
2028 int32_t chunk;
2029 int32_t left_in_chunk;
2030 int64_t chunk_file_offset;
2031 int64_t sample_file_offset;
2032 int32_t first_chunk_sample;
2033 int32_t sample_to_chunk_idx;
2034 int sample_to_time_index;
2035 long sample_to_time_sample = 0;
2036 uint64_t sample_to_time_time = 0;
2037 int mov_idx;
2038
2039 // Find the corresponding mov stream
2040 for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)
2041 if (mov->streams[mov_idx]->ffindex == stream_index)
2042 break;
2043 if (mov_idx == mov->total_streams) {
2044 av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
2045 return -1;
2046 }
2047 sc = mov->streams[mov_idx];
2048
2049 // Step 1. Find the edit that contains the requested time (elst)
2050 if (sc->edit_count) {
2051 // FIXME should handle edit list
2052 av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
2053 return -1;
2054 }
2055
2056 // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
2057 #ifdef DEBUG
2058 av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);
2059 #endif
2060 // convert timestamp from time_base unit to timescale unit
2061 sample_time = av_rescale( timestamp,
2062 (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,
2063 (int64_t)s->streams[stream_index]->time_base.den);
2064 start_time = 0; // FIXME use elst atom
2065 sample = 1; // sample are 0 based in table
2066 #ifdef DEBUG
2067 av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);
2068 #endif
2069 for (i = 0; i < sc->stts_count; i++) {
2070 count = sc->stts_data[i].count;
2071 duration = sc->stts_data[i].duration;
2072 //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);
2073 //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);
2074 if ((start_time + count*duration) > sample_time) {
2075 sample_to_time_time = start_time;
2076 sample_to_time_index = i;
2077 sample_to_time_sample = sample;
2078 sample += (sample_time - start_time) / duration;
2079 break;
2080 }
2081 sample += count;
2082 start_time += count * duration;
2083 }
2084 sample_to_time_time = start_time;
2085 sample_to_time_index = i;
2086 /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
2087 is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
2088
2089 #ifdef DEBUG
2090 av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);
2091 #endif
2092 if (sample > sc->sample_count) {
2093 av_log(s, AV_LOG_ERROR, "mov: sample pos is too high, unable to seek (req. sample=%i, sample count=%ld)\n", sample, sc->sample_count);
2094 return -1;
2095 }
2096
2097 // Step 3. Find the prior sync. sample using the Sync sample atom (stss)
2098 if (sc->keyframes) {
2099 a = 0;
2100 b = sc->keyframe_count - 1;
2101 while (a < b) {
2102 m = (a + b + 1) >> 1;
2103 if (sc->keyframes[m] > sample) {
2104 b = m - 1;
2105 } else {
2106 a = m;
2107 }
2108 #ifdef DEBUG
2109 // av_log(s, AV_LOG_DEBUG, "a=%i (%i) b=%i (%i) m=%i (%i) stream #%i\n", a, sc->keyframes[a], b, sc->keyframes[b], m, sc->keyframes[m], mov_idx);
2110 #endif
2111 }
2112 // for low latency prob: always use the previous keyframe, just uncomment the next line
2113 // if (a) a--;
2114 seek_sample = sc->keyframes[a];
2115 }
2116 else
2117 seek_sample = sample; // else all samples are key frames
2118 #ifdef DEBUG
2119 av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);
2120 #endif
2121
2122 // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
2123 for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {
2124 b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
2125 if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
2126 break;
2127 first_chunk_sample += b;
2128 }
2129 chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;
2130 left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;
2131 first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;
2132 sample_to_chunk_idx = i;
2133 #ifdef DEBUG
2134 av_log(s, AV_LOG_DEBUG, "Sample was found in chunk #%i at sample offset %i (idx %i)\n", chunk, seek_sample - first_chunk_sample, sample_to_chunk_idx);
2135 #endif
2136
2137 // Step 5. Find the offset of the chunk using the chunk offset atom
2138 if (!sc->chunk_offsets) {
2139 av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
2140 return -1;
2141 }
2142 if (chunk > sc->chunk_count) {
2143 av_log(s, AV_LOG_ERROR, "mov: chunk offset atom too short, unable to seek (req. chunk=%i, chunk count=%li)\n", chunk, sc->chunk_count);
2144 return -1;
2145 }
2146 chunk_file_offset = sc->chunk_offsets[chunk - 1];
2147 #ifdef DEBUG
2148 av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);
2149 #endif
2150
2151 // Step 6. Find the byte offset within the chunk using the sample size atom
2152 sample_file_offset = chunk_file_offset;
2153 if (sc->sample_size)
2154 sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;
2155 else {
2156 for (i = 0; i < (seek_sample - first_chunk_sample); i++) {
2157 sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
2158 }
2159 }
2160 #ifdef DEBUG
2161 av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);
2162 #endif
2163
2164 // Step 6. Update the parser
2165 mov->partial = sc;
2166 mov->next_chunk_offset = sample_file_offset;
2167 // Update current stream state
2168 sc->current_sample = seek_sample - 1; // zero based
2169 sc->left_in_chunk = left_in_chunk;
2170 sc->next_chunk = chunk; // +1 -1 (zero based)
2171 sc->sample_to_chunk_index = sample_to_chunk_idx;
2172
2173 // Update other streams
2174 for (i = 0; i<mov->total_streams; i++) {
2175 MOVStreamContext *msc;
2176 if (i == mov_idx) continue;
2177 // Find the nearest 'next' chunk
2178 msc = mov->streams[i];
2179 a = 0;
2180 b = msc->chunk_count - 1;
2181 while (a < b) {
2182 m = (a + b + 1) >> 1;
2183 if (msc->chunk_offsets[m] > chunk_file_offset) {
2184 b = m - 1;
2185 } else {
2186 a = m;
2187 }
2188 #ifdef DEBUG
2189 /* av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"
2190 , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m], i); */
2191 #endif
2192 }
2193 msc->next_chunk = a;
2194 if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))
2195 msc->next_chunk ++;
2196 #ifdef DEBUG
2197 av_log(s, AV_LOG_DEBUG, "Nearest next chunk for stream #%i is #%i @%lli\n", i, msc->next_chunk+1, msc->chunk_offsets[msc->next_chunk]);
2198 #endif
2199 // Compute sample count and index in the sample_to_chunk table (what a pity)
2200 msc->sample_to_chunk_index = 0;
2201 msc->current_sample = 0;
2202 for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)
2203 && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {
2204 msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
2205 * msc->sample_to_chunk[msc->sample_to_chunk_index].count;
2206 }
2207 msc->current_sample += (msc->next_chunk - (msc->sample_to_chunk[msc->sample_to_chunk_index].first - 1)) * sc->sample_to_chunk[msc->sample_to_chunk_index].count;
2208 msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
2209 // Find corresponding position in stts (used later to compute dts)
2210 sample = 0;
2211 start_time = 0;
2212 for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {
2213 count = msc->stts_data[msc->sample_to_time_index].count;
2214 duration = msc->stts_data[msc->sample_to_time_index].duration;
2215 if ((sample + count - 1) > msc->current_sample) {
2216 msc->sample_to_time_time = start_time;
2217 msc->sample_to_time_sample = sample;
2218 break;
2219 }
2220 sample += count;
2221 start_time += count * duration;
2222 }
2223 sample = 0;
2224 for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {
2225 count = msc->ctts_data[msc->sample_to_ctime_index].count;
2226 duration = msc->ctts_data[msc->sample_to_ctime_index].duration;
2227 if ((sample + count - 1) > msc->current_sample) {
2228 msc->sample_to_ctime_sample = sample;
2229 break;
2230 }
2231 sample += count;
2232 }
2233 #ifdef DEBUG
2234 av_log(s, AV_LOG_DEBUG, "Next Sample for stream #%i is #%i @%i\n", i, msc->current_sample + 1, msc->sample_to_chunk_index + 1);
2235 #endif
2236 }
2237 return 0;
2238 }
2239 #endif
2240
2241 static int mov_read_close(AVFormatContext *s)
2242 {
2243 int i;
2244 MOVContext *mov = (MOVContext *) s->priv_data;
2245 for(i=0; i<mov->total_streams; i++)
2246 mov_free_stream_context(mov->streams[i]);
2247 /* free color tabs */
2248 for(i=0; i<mov->ctab_size; i++)
2249 av_freep(&mov->ctab[i]);
2250 av_freep(&mov->ctab);
2251 return 0;
2252 }
2253
2254 static AVInputFormat mov_iformat = {
2255 "mov,mp4,m4a,3gp,3g2",
2256 "QuickTime/MPEG4 format",
2257 sizeof(MOVContext),
2258 mov_probe,
2259 mov_read_header,
2260 mov_read_packet,
2261 mov_read_close,
2262 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2263 mov_read_seek,
2264 #endif
2265 };
2266
2267 int mov_init(void)
2268 {
2269 av_register_input_format(&mov_iformat);
2270 return 0;
2271 }