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memset when category is >=7, part of cook multichannel
[FFMpeg-mirror/ordered_chapters.git] / libavformat / mov.c
blobfac6d0ccdfd698b89bc2ef779815c086263152a9
1 /*
2 * MOV demuxer
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <limits.h>
24
25 //#define DEBUG
26
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/avstring.h"
29 #include "avformat.h"
30 #include "riff.h"
31 #include "isom.h"
32 #include "libavcodec/mpeg4audio.h"
33 #include "libavcodec/mpegaudiodata.h"
34
35 #if CONFIG_ZLIB
36 #include <zlib.h>
37 #endif
38
39 /*
40 * First version by Francois Revol revol@free.fr
41 * Seek function by Gael Chardon gael.dev@4now.net
42 *
43 * Features and limitations:
44 * - reads most of the QT files I have (at least the structure),
45 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
46 * - the code is quite ugly... maybe I won't do it recursive next time :-)
47 *
48 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
49 * when coding this :) (it's a writer anyway)
50 *
51 * Reference documents:
52 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
53 * Apple:
54 * http://developer.apple.com/documentation/QuickTime/QTFF/
55 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
56 * QuickTime is a trademark of Apple (AFAIK :))
57 */
58
59 #include "qtpalette.h"
60
61
62 #undef NDEBUG
63 #include <assert.h>
64
65 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
66
67 /* those functions parse an atom */
68 /* return code:
69 0: continue to parse next atom
70 <0: error occurred, exit
71 */
72 /* links atom IDs to parse functions */
73 typedef struct MOVParseTableEntry {
74 uint32_t type;
75 int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
76 } MOVParseTableEntry;
77
78 static const MOVParseTableEntry mov_default_parse_table[];
79
80 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
81 {
82 int64_t total_size = 0;
83 MOVAtom a;
84 int i;
85 int err = 0;
86
87 a.offset = atom.offset;
88
89 if (atom.size < 0)
90 atom.size = INT64_MAX;
91 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
92 a.size = atom.size;
93 a.type=0;
94 if(atom.size >= 8) {
95 a.size = get_be32(pb);
96 a.type = get_le32(pb);
97 }
98 total_size += 8;
99 a.offset += 8;
100 dprintf(c->fc, "type: %08x %.4s sz: %"PRIx64" %"PRIx64" %"PRIx64"\n",
101 a.type, (char*)&a.type, a.size, atom.size, total_size);
102 if (a.size == 1) { /* 64 bit extended size */
103 a.size = get_be64(pb) - 8;
104 a.offset += 8;
105 total_size += 8;
106 }
107 if (a.size == 0) {
108 a.size = atom.size - total_size;
109 if (a.size <= 8)
110 break;
111 }
112 a.size -= 8;
113 if(a.size < 0)
114 break;
115 a.size = FFMIN(a.size, atom.size - total_size);
116
117 for (i = 0; mov_default_parse_table[i].type != 0
118 && mov_default_parse_table[i].type != a.type; i++)
119 /* empty */;
120
121 if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
122 url_fskip(pb, a.size);
123 } else {
124 int64_t start_pos = url_ftell(pb);
125 int64_t left;
126 err = mov_default_parse_table[i].parse(c, pb, a);
127 if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
128 break;
129 left = a.size - url_ftell(pb) + start_pos;
130 if (left > 0) /* skip garbage at atom end */
131 url_fskip(pb, left);
132 }
133
134 a.offset += a.size;
135 total_size += a.size;
136 }
137
138 if (!err && total_size < atom.size && atom.size < 0x7ffff)
139 url_fskip(pb, atom.size - total_size);
140
141 return err;
142 }
143
144 static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
145 {
146 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
147 MOVStreamContext *sc = st->priv_data;
148 int entries, i, j;
149
150 get_be32(pb); // version + flags
151 entries = get_be32(pb);
152 if (entries >= UINT_MAX / sizeof(*sc->drefs))
153 return -1;
154 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
155 if (!sc->drefs)
156 return AVERROR(ENOMEM);
157 sc->drefs_count = entries;
158
159 for (i = 0; i < sc->drefs_count; i++) {
160 MOVDref *dref = &sc->drefs[i];
161 uint32_t size = get_be32(pb);
162 int64_t next = url_ftell(pb) + size - 4;
163
164 dref->type = get_le32(pb);
165 get_be32(pb); // version + flags
166 dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
167
168 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
169 /* macintosh alias record */
170 uint16_t volume_len, len;
171 char volume[28];
172 int16_t type;
173
174 url_fskip(pb, 10);
175
176 volume_len = get_byte(pb);
177 volume_len = FFMIN(volume_len, 27);
178 get_buffer(pb, volume, 27);
179 volume[volume_len] = 0;
180 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
181
182 url_fskip(pb, 112);
183
184 for (type = 0; type != -1 && url_ftell(pb) < next; ) {
185 type = get_be16(pb);
186 len = get_be16(pb);
187 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
188 if (len&1)
189 len += 1;
190 if (type == 2) { // absolute path
191 av_free(dref->path);
192 dref->path = av_mallocz(len+1);
193 if (!dref->path)
194 return AVERROR(ENOMEM);
195 get_buffer(pb, dref->path, len);
196 if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
197 len -= volume_len;
198 memmove(dref->path, dref->path+volume_len, len);
199 dref->path[len] = 0;
200 }
201 for (j = 0; j < len; j++)
202 if (dref->path[j] == ':')
203 dref->path[j] = '/';
204 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
205 } else
206 url_fskip(pb, len);
207 }
208 }
209 url_fseek(pb, next, SEEK_SET);
210 }
211 return 0;
212 }
213
214 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
215 {
216 AVStream *st;
217 uint32_t type;
218 uint32_t ctype;
219
220 if (c->fc->nb_streams < 1) // meta before first trak
221 return 0;
222
223 st = c->fc->streams[c->fc->nb_streams-1];
224
225 get_byte(pb); /* version */
226 get_be24(pb); /* flags */
227
228 /* component type */
229 ctype = get_le32(pb);
230 type = get_le32(pb); /* component subtype */
231
232 dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
233 ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
234 dprintf(c->fc, "stype= %c%c%c%c\n",
235 *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
236 if(!ctype)
237 c->isom = 1;
238 if (type == MKTAG('v','i','d','e'))
239 st->codec->codec_type = CODEC_TYPE_VIDEO;
240 else if(type == MKTAG('s','o','u','n'))
241 st->codec->codec_type = CODEC_TYPE_AUDIO;
242 else if(type == MKTAG('m','1','a',' '))
243 st->codec->codec_id = CODEC_ID_MP2;
244 else if(type == MKTAG('s','u','b','p')) {
245 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
246 }
247 get_be32(pb); /* component manufacture */
248 get_be32(pb); /* component flags */
249 get_be32(pb); /* component flags mask */
250
251 if(atom.size <= 24)
252 return 0; /* nothing left to read */
253
254 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
255 return 0;
256 }
257
258 static int mp4_read_descr_len(ByteIOContext *pb)
259 {
260 int len = 0;
261 int count = 4;
262 while (count--) {
263 int c = get_byte(pb);
264 len = (len << 7) | (c & 0x7f);
265 if (!(c & 0x80))
266 break;
267 }
268 return len;
269 }
270
271 static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
272 {
273 int len;
274 *tag = get_byte(pb);
275 len = mp4_read_descr_len(pb);
276 dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
277 return len;
278 }
279
280 #define MP4ESDescrTag 0x03
281 #define MP4DecConfigDescrTag 0x04
282 #define MP4DecSpecificDescrTag 0x05
283
284 static const AVCodecTag mp4_audio_types[] = {
285 { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
286 { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
287 { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
288 { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
289 { CODEC_ID_NONE, 0 },
290 };
291
292 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
293 {
294 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
295 int tag, len;
296
297 get_be32(pb); /* version + flags */
298 len = mp4_read_descr(c, pb, &tag);
299 if (tag == MP4ESDescrTag) {
300 get_be16(pb); /* ID */
301 get_byte(pb); /* priority */
302 } else
303 get_be16(pb); /* ID */
304
305 len = mp4_read_descr(c, pb, &tag);
306 if (tag == MP4DecConfigDescrTag) {
307 int object_type_id = get_byte(pb);
308 get_byte(pb); /* stream type */
309 get_be24(pb); /* buffer size db */
310 get_be32(pb); /* max bitrate */
311 get_be32(pb); /* avg bitrate */
312
313 st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
314 dprintf(c->fc, "esds object type id %d\n", object_type_id);
315 len = mp4_read_descr(c, pb, &tag);
316 if (tag == MP4DecSpecificDescrTag) {
317 dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
318 if((uint64_t)len > (1<<30))
319 return -1;
320 st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
321 if (!st->codec->extradata)
322 return AVERROR(ENOMEM);
323 get_buffer(pb, st->codec->extradata, len);
324 st->codec->extradata_size = len;
325 if (st->codec->codec_id == CODEC_ID_AAC) {
326 MPEG4AudioConfig cfg;
327 ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
328 st->codec->extradata_size);
329 if (cfg.chan_config > 7)
330 return -1;
331 st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
332 if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
333 st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
334 else
335 st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
336 dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
337 "sample rate %d ext sample rate %d\n", st->codec->channels,
338 cfg.object_type, cfg.ext_object_type,
339 cfg.sample_rate, cfg.ext_sample_rate);
340 if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
341 cfg.object_type)))
342 st->codec->codec_id = CODEC_ID_AAC;
343 }
344 }
345 }
346 return 0;
347 }
348
349 static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
350 {
351 const int num = get_be32(pb);
352 const int den = get_be32(pb);
353 AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
354 if (den != 0) {
355 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
356 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
357 av_log(c->fc, AV_LOG_WARNING,
358 "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
359 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
360 st->sample_aspect_ratio.num = num;
361 st->sample_aspect_ratio.den = den;
362 }
363 return 0;
364 }
365
366 /* this atom contains actual media data */
367 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
368 {
369 if(atom.size == 0) /* wrong one (MP4) */
370 return 0;
371 c->found_mdat=1;
372 return 0; /* now go for moov */
373 }
374
375 static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
376 {
377 uint32_t type = get_le32(pb);
378
379 if (type != MKTAG('q','t',' ',' '))
380 c->isom = 1;
381 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
382 get_be32(pb); /* minor version */
383 url_fskip(pb, atom.size - 8);
384 return 0;
385 }
386
387 /* this atom should contain all header atoms */
388 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
389 {
390 if (mov_read_default(c, pb, atom) < 0)
391 return -1;
392 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
393 /* so we don't parse the whole file if over a network */
394 c->found_moov=1;
395 return 0; /* now go for mdat */
396 }
397
398 static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
399 {
400 c->fragment.moof_offset = url_ftell(pb) - 8;
401 dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
402 return mov_read_default(c, pb, atom);
403 }
404
405 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
406 {
407 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
408 MOVStreamContext *sc = st->priv_data;
409 int version = get_byte(pb);
410 char language[4] = {0};
411 unsigned lang;
412
413 if (version > 1)
414 return -1; /* unsupported */
415
416 get_be24(pb); /* flags */
417 if (version == 1) {
418 get_be64(pb);
419 get_be64(pb);
420 } else {
421 get_be32(pb); /* creation time */
422 get_be32(pb); /* modification time */
423 }
424
425 sc->time_scale = get_be32(pb);
426 st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
427
428 lang = get_be16(pb); /* language */
429 if (ff_mov_lang_to_iso639(lang, language))
430 av_metadata_set(&st->metadata, "language", language);
431 get_be16(pb); /* quality */
432
433 return 0;
434 }
435
436 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
437 {
438 int version = get_byte(pb); /* version */
439 get_be24(pb); /* flags */
440
441 if (version == 1) {
442 get_be64(pb);
443 get_be64(pb);
444 } else {
445 get_be32(pb); /* creation time */
446 get_be32(pb); /* modification time */
447 }
448 c->time_scale = get_be32(pb); /* time scale */
449
450 dprintf(c->fc, "time scale = %i\n", c->time_scale);
451
452 c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
453 get_be32(pb); /* preferred scale */
454
455 get_be16(pb); /* preferred volume */
456
457 url_fskip(pb, 10); /* reserved */
458
459 url_fskip(pb, 36); /* display matrix */
460
461 get_be32(pb); /* preview time */
462 get_be32(pb); /* preview duration */
463 get_be32(pb); /* poster time */
464 get_be32(pb); /* selection time */
465 get_be32(pb); /* selection duration */
466 get_be32(pb); /* current time */
467 get_be32(pb); /* next track ID */
468
469 return 0;
470 }
471
472 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
473 {
474 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
475
476 if((uint64_t)atom.size > (1<<30))
477 return -1;
478
479 // currently SVQ3 decoder expect full STSD header - so let's fake it
480 // this should be fixed and just SMI header should be passed
481 av_free(st->codec->extradata);
482 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
483 if (!st->codec->extradata)
484 return AVERROR(ENOMEM);
485 st->codec->extradata_size = 0x5a + atom.size;
486 memcpy(st->codec->extradata, "SVQ3", 4); // fake
487 get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
488 dprintf(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
489 return 0;
490 }
491
492 static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
493 {
494 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
495 int little_endian = get_be16(pb);
496
497 dprintf(c->fc, "enda %d\n", little_endian);
498 if (little_endian == 1) {
499 switch (st->codec->codec_id) {
500 case CODEC_ID_PCM_S24BE:
501 st->codec->codec_id = CODEC_ID_PCM_S24LE;
502 break;
503 case CODEC_ID_PCM_S32BE:
504 st->codec->codec_id = CODEC_ID_PCM_S32LE;
505 break;
506 case CODEC_ID_PCM_F32BE:
507 st->codec->codec_id = CODEC_ID_PCM_F32LE;
508 break;
509 case CODEC_ID_PCM_F64BE:
510 st->codec->codec_id = CODEC_ID_PCM_F64LE;
511 break;
512 default:
513 break;
514 }
515 }
516 return 0;
517 }
518
519 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
520 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
521 {
522 AVStream *st;
523 uint64_t size;
524 uint8_t *buf;
525
526 if (c->fc->nb_streams < 1) // will happen with jp2 files
527 return 0;
528 st= c->fc->streams[c->fc->nb_streams-1];
529 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
530 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
531 return -1;
532 buf= av_realloc(st->codec->extradata, size);
533 if(!buf)
534 return -1;
535 st->codec->extradata= buf;
536 buf+= st->codec->extradata_size;
537 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
538 AV_WB32( buf , atom.size + 8);
539 AV_WL32( buf + 4, atom.type);
540 get_buffer(pb, buf + 8, atom.size);
541 return 0;
542 }
543
544 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
545 {
546 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
547
548 if((uint64_t)atom.size > (1<<30))
549 return -1;
550
551 if (st->codec->codec_id == CODEC_ID_QDM2) {
552 // pass all frma atom to codec, needed at least for QDM2
553 av_free(st->codec->extradata);
554 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
555 if (!st->codec->extradata)
556 return AVERROR(ENOMEM);
557 st->codec->extradata_size = atom.size;
558 get_buffer(pb, st->codec->extradata, atom.size);
559 } else if (atom.size > 8) { /* to read frma, esds atoms */
560 if (mov_read_default(c, pb, atom) < 0)
561 return -1;
562 } else
563 url_fskip(pb, atom.size);
564 return 0;
565 }
566
567 /**
568 * This function reads atom content and puts data in extradata without tag
569 * nor size unlike mov_read_extradata.
570 */
571 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
572 {
573 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
574
575 if((uint64_t)atom.size > (1<<30))
576 return -1;
577
578 av_free(st->codec->extradata);
579 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
580 if (!st->codec->extradata)
581 return AVERROR(ENOMEM);
582 st->codec->extradata_size = atom.size;
583 get_buffer(pb, st->codec->extradata, atom.size);
584 return 0;
585 }
586
587 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
588 {
589 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
590 MOVStreamContext *sc = st->priv_data;
591 unsigned int i, entries;
592
593 get_byte(pb); /* version */
594 get_be24(pb); /* flags */
595
596 entries = get_be32(pb);
597
598 if(entries >= UINT_MAX/sizeof(int64_t))
599 return -1;
600
601 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
602 if (!sc->chunk_offsets)
603 return AVERROR(ENOMEM);
604 sc->chunk_count = entries;
605
606 if (atom.type == MKTAG('s','t','c','o'))
607 for(i=0; i<entries; i++)
608 sc->chunk_offsets[i] = get_be32(pb);
609 else if (atom.type == MKTAG('c','o','6','4'))
610 for(i=0; i<entries; i++)
611 sc->chunk_offsets[i] = get_be64(pb);
612 else
613 return -1;
614
615 return 0;
616 }
617
618 /**
619 * Compute codec id for 'lpcm' tag.
620 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
621 */
622 static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
623 {
624 if (flags & 1) { // floating point
625 if (flags & 2) { // big endian
626 if (bps == 32) return CODEC_ID_PCM_F32BE;
627 else if (bps == 64) return CODEC_ID_PCM_F64BE;
628 } else {
629 if (bps == 32) return CODEC_ID_PCM_F32LE;
630 else if (bps == 64) return CODEC_ID_PCM_F64LE;
631 }
632 } else {
633 if (flags & 2) {
634 if (bps == 8)
635 // signed integer
636 if (flags & 4) return CODEC_ID_PCM_S8;
637 else return CODEC_ID_PCM_U8;
638 else if (bps == 16) return CODEC_ID_PCM_S16BE;
639 else if (bps == 24) return CODEC_ID_PCM_S24BE;
640 else if (bps == 32) return CODEC_ID_PCM_S32BE;
641 } else {
642 if (bps == 8)
643 if (flags & 4) return CODEC_ID_PCM_S8;
644 else return CODEC_ID_PCM_U8;
645 else if (bps == 16) return CODEC_ID_PCM_S16LE;
646 else if (bps == 24) return CODEC_ID_PCM_S24LE;
647 else if (bps == 32) return CODEC_ID_PCM_S32LE;
648 }
649 }
650 return CODEC_ID_NONE;
651 }
652
653 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
654 {
655 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
656 MOVStreamContext *sc = st->priv_data;
657 int j, entries, pseudo_stream_id;
658
659 get_byte(pb); /* version */
660 get_be24(pb); /* flags */
661
662 entries = get_be32(pb);
663
664 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
665 //Parsing Sample description table
666 enum CodecID id;
667 int dref_id;
668 MOVAtom a = { 0, 0, 0 };
669 int64_t start_pos = url_ftell(pb);
670 int size = get_be32(pb); /* size */
671 uint32_t format = get_le32(pb); /* data format */
672
673 get_be32(pb); /* reserved */
674 get_be16(pb); /* reserved */
675 dref_id = get_be16(pb);
676
677 if (st->codec->codec_tag &&
678 st->codec->codec_tag != format &&
679 (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
680 : st->codec->codec_tag != MKTAG('j','p','e','g'))
681 ){
682 /* Multiple fourcc, we skip JPEG. This is not correct, we should
683 * export it as a separate AVStream but this needs a few changes
684 * in the MOV demuxer, patch welcome. */
685 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
686 url_fskip(pb, size - (url_ftell(pb) - start_pos));
687 continue;
688 }
689 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
690 sc->dref_id= dref_id;
691
692 st->codec->codec_tag = format;
693 id = codec_get_id(codec_movaudio_tags, format);
694 if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
695 id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
696
697 if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
698 st->codec->codec_type = CODEC_TYPE_AUDIO;
699 } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
700 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
701 id = codec_get_id(codec_movvideo_tags, format);
702 if (id <= 0)
703 id = codec_get_id(codec_bmp_tags, format);
704 if (id > 0)
705 st->codec->codec_type = CODEC_TYPE_VIDEO;
706 else if(st->codec->codec_type == CODEC_TYPE_DATA){
707 id = codec_get_id(ff_codec_movsubtitle_tags, format);
708 if(id > 0)
709 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
710 }
711 }
712
713 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
714 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
715 (format >> 24) & 0xff, st->codec->codec_type);
716
717 if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
718 uint8_t codec_name[32];
719 unsigned int color_depth;
720 int color_greyscale;
721
722 st->codec->codec_id = id;
723 get_be16(pb); /* version */
724 get_be16(pb); /* revision level */
725 get_be32(pb); /* vendor */
726 get_be32(pb); /* temporal quality */
727 get_be32(pb); /* spatial quality */
728
729 st->codec->width = get_be16(pb); /* width */
730 st->codec->height = get_be16(pb); /* height */
731
732 get_be32(pb); /* horiz resolution */
733 get_be32(pb); /* vert resolution */
734 get_be32(pb); /* data size, always 0 */
735 get_be16(pb); /* frames per samples */
736
737 get_buffer(pb, codec_name, 32); /* codec name, pascal string */
738 if (codec_name[0] <= 31) {
739 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
740 st->codec->codec_name[codec_name[0]] = 0;
741 }
742
743 st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
744 st->codec->color_table_id = get_be16(pb); /* colortable id */
745 dprintf(c->fc, "depth %d, ctab id %d\n",
746 st->codec->bits_per_coded_sample, st->codec->color_table_id);
747 /* figure out the palette situation */
748 color_depth = st->codec->bits_per_coded_sample & 0x1F;
749 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
750
751 /* if the depth is 2, 4, or 8 bpp, file is palettized */
752 if ((color_depth == 2) || (color_depth == 4) ||
753 (color_depth == 8)) {
754 /* for palette traversal */
755 unsigned int color_start, color_count, color_end;
756 unsigned char r, g, b;
757
758 st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
759 if (color_greyscale) {
760 int color_index, color_dec;
761 /* compute the greyscale palette */
762 st->codec->bits_per_coded_sample = color_depth;
763 color_count = 1 << color_depth;
764 color_index = 255;
765 color_dec = 256 / (color_count - 1);
766 for (j = 0; j < color_count; j++) {
767 r = g = b = color_index;
768 st->codec->palctrl->palette[j] =
769 (r << 16) | (g << 8) | (b);
770 color_index -= color_dec;
771 if (color_index < 0)
772 color_index = 0;
773 }
774 } else if (st->codec->color_table_id) {
775 const uint8_t *color_table;
776 /* if flag bit 3 is set, use the default palette */
777 color_count = 1 << color_depth;
778 if (color_depth == 2)
779 color_table = ff_qt_default_palette_4;
780 else if (color_depth == 4)
781 color_table = ff_qt_default_palette_16;
782 else
783 color_table = ff_qt_default_palette_256;
784
785 for (j = 0; j < color_count; j++) {
786 r = color_table[j * 4 + 0];
787 g = color_table[j * 4 + 1];
788 b = color_table[j * 4 + 2];
789 st->codec->palctrl->palette[j] =
790 (r << 16) | (g << 8) | (b);
791 }
792 } else {
793 /* load the palette from the file */
794 color_start = get_be32(pb);
795 color_count = get_be16(pb);
796 color_end = get_be16(pb);
797 if ((color_start <= 255) &&
798 (color_end <= 255)) {
799 for (j = color_start; j <= color_end; j++) {
800 /* each R, G, or B component is 16 bits;
801 * only use the top 8 bits; skip alpha bytes
802 * up front */
803 get_byte(pb);
804 get_byte(pb);
805 r = get_byte(pb);
806 get_byte(pb);
807 g = get_byte(pb);
808 get_byte(pb);
809 b = get_byte(pb);
810 get_byte(pb);
811 st->codec->palctrl->palette[j] =
812 (r << 16) | (g << 8) | (b);
813 }
814 }
815 }
816 st->codec->palctrl->palette_changed = 1;
817 }
818 } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
819 int bits_per_sample, flags;
820 uint16_t version = get_be16(pb);
821
822 st->codec->codec_id = id;
823 get_be16(pb); /* revision level */
824 get_be32(pb); /* vendor */
825
826 st->codec->channels = get_be16(pb); /* channel count */
827 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
828 st->codec->bits_per_coded_sample = get_be16(pb); /* sample size */
829
830 sc->audio_cid = get_be16(pb);
831 get_be16(pb); /* packet size = 0 */
832
833 st->codec->sample_rate = ((get_be32(pb) >> 16));
834
835 //Read QT version 1 fields. In version 0 these do not exist.
836 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
837 if(!c->isom) {
838 if(version==1) {
839 sc->samples_per_frame = get_be32(pb);
840 get_be32(pb); /* bytes per packet */
841 sc->bytes_per_frame = get_be32(pb);
842 get_be32(pb); /* bytes per sample */
843 } else if(version==2) {
844 get_be32(pb); /* sizeof struct only */
845 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
846 st->codec->channels = get_be32(pb);
847 get_be32(pb); /* always 0x7F000000 */
848 st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
849 flags = get_be32(pb); /* lcpm format specific flag */
850 sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
851 sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
852 if (format == MKTAG('l','p','c','m'))
853 st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
854 }
855 }
856
857 switch (st->codec->codec_id) {
858 case CODEC_ID_PCM_S8:
859 case CODEC_ID_PCM_U8:
860 if (st->codec->bits_per_coded_sample == 16)
861 st->codec->codec_id = CODEC_ID_PCM_S16BE;
862 break;
863 case CODEC_ID_PCM_S16LE:
864 case CODEC_ID_PCM_S16BE:
865 if (st->codec->bits_per_coded_sample == 8)
866 st->codec->codec_id = CODEC_ID_PCM_S8;
867 else if (st->codec->bits_per_coded_sample == 24)
868 st->codec->codec_id =
869 st->codec->codec_id == CODEC_ID_PCM_S16BE ?
870 CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
871 break;
872 /* set values for old format before stsd version 1 appeared */
873 case CODEC_ID_MACE3:
874 sc->samples_per_frame = 6;
875 sc->bytes_per_frame = 2*st->codec->channels;
876 break;
877 case CODEC_ID_MACE6:
878 sc->samples_per_frame = 6;
879 sc->bytes_per_frame = 1*st->codec->channels;
880 break;
881 case CODEC_ID_ADPCM_IMA_QT:
882 sc->samples_per_frame = 64;
883 sc->bytes_per_frame = 34*st->codec->channels;
884 break;
885 case CODEC_ID_GSM:
886 sc->samples_per_frame = 160;
887 sc->bytes_per_frame = 33;
888 break;
889 default:
890 break;
891 }
892
893 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
894 if (bits_per_sample) {
895 st->codec->bits_per_coded_sample = bits_per_sample;
896 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
897 }
898 } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
899 // ttxt stsd contains display flags, justification, background
900 // color, fonts, and default styles, so fake an atom to read it
901 MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
902 mov_read_glbl(c, pb, fake_atom);
903 st->codec->codec_id= id;
904 st->codec->width = sc->width;
905 st->codec->height = sc->height;
906 } else {
907 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
908 url_fskip(pb, size - (url_ftell(pb) - start_pos));
909 }
910 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
911 a.size = size - (url_ftell(pb) - start_pos);
912 if (a.size > 8) {
913 if (mov_read_default(c, pb, a) < 0)
914 return -1;
915 } else if (a.size > 0)
916 url_fskip(pb, a.size);
917 }
918
919 if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
920 st->codec->sample_rate= sc->time_scale;
921
922 /* special codec parameters handling */
923 switch (st->codec->codec_id) {
924 #if CONFIG_DV_DEMUXER
925 case CODEC_ID_DVAUDIO:
926 c->dv_fctx = avformat_alloc_context();
927 c->dv_demux = dv_init_demux(c->dv_fctx);
928 if (!c->dv_demux) {
929 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
930 return -1;
931 }
932 sc->dv_audio_container = 1;
933 st->codec->codec_id = CODEC_ID_PCM_S16LE;
934 break;
935 #endif
936 /* no ifdef since parameters are always those */
937 case CODEC_ID_QCELP:
938 st->codec->frame_size= 160;
939 st->codec->channels= 1; /* really needed */
940 break;
941 case CODEC_ID_AMR_NB:
942 case CODEC_ID_AMR_WB:
943 st->codec->frame_size= sc->samples_per_frame;
944 st->codec->channels= 1; /* really needed */
945 /* force sample rate for amr, stsd in 3gp does not store sample rate */
946 if (st->codec->codec_id == CODEC_ID_AMR_NB)
947 st->codec->sample_rate = 8000;
948 else if (st->codec->codec_id == CODEC_ID_AMR_WB)
949 st->codec->sample_rate = 16000;
950 break;
951 case CODEC_ID_MP2:
952 case CODEC_ID_MP3:
953 st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
954 st->need_parsing = AVSTREAM_PARSE_FULL;
955 break;
956 case CODEC_ID_GSM:
957 case CODEC_ID_ADPCM_MS:
958 case CODEC_ID_ADPCM_IMA_WAV:
959 st->codec->block_align = sc->bytes_per_frame;
960 break;
961 case CODEC_ID_ALAC:
962 if (st->codec->extradata_size == 36) {
963 st->codec->frame_size = AV_RB32(st->codec->extradata+12);
964 st->codec->channels = AV_RB8 (st->codec->extradata+21);
965 }
966 break;
967 default:
968 break;
969 }
970
971 return 0;
972 }
973
974 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
975 {
976 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
977 MOVStreamContext *sc = st->priv_data;
978 unsigned int i, entries;
979
980 get_byte(pb); /* version */
981 get_be24(pb); /* flags */
982
983 entries = get_be32(pb);
984
985 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
986
987 if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
988 return -1;
989 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
990 if (!sc->stsc_data)
991 return AVERROR(ENOMEM);
992 sc->stsc_count = entries;
993
994 for(i=0; i<entries; i++) {
995 sc->stsc_data[i].first = get_be32(pb);
996 sc->stsc_data[i].count = get_be32(pb);
997 sc->stsc_data[i].id = get_be32(pb);
998 }
999 return 0;
1000 }
1001
1002 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1003 {
1004 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1005 MOVStreamContext *sc = st->priv_data;
1006 unsigned int i, entries;
1007
1008 get_byte(pb); /* version */
1009 get_be24(pb); /* flags */
1010
1011 entries = get_be32(pb);
1012
1013 dprintf(c->fc, "keyframe_count = %d\n", entries);
1014
1015 if(entries >= UINT_MAX / sizeof(int))
1016 return -1;
1017 sc->keyframes = av_malloc(entries * sizeof(int));
1018 if (!sc->keyframes)
1019 return AVERROR(ENOMEM);
1020 sc->keyframe_count = entries;
1021
1022 for(i=0; i<entries; i++) {
1023 sc->keyframes[i] = get_be32(pb);
1024 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1025 }
1026 return 0;
1027 }
1028
1029 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1030 {
1031 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1032 MOVStreamContext *sc = st->priv_data;
1033 unsigned int i, entries, sample_size;
1034
1035 get_byte(pb); /* version */
1036 get_be24(pb); /* flags */
1037
1038 sample_size = get_be32(pb);
1039 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1040 sc->sample_size = sample_size;
1041 entries = get_be32(pb);
1042
1043 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1044
1045 sc->sample_count = entries;
1046 if (sample_size)
1047 return 0;
1048
1049 if(entries >= UINT_MAX / sizeof(int))
1050 return -1;
1051 sc->sample_sizes = av_malloc(entries * sizeof(int));
1052 if (!sc->sample_sizes)
1053 return AVERROR(ENOMEM);
1054
1055 for(i=0; i<entries; i++)
1056 sc->sample_sizes[i] = get_be32(pb);
1057 return 0;
1058 }
1059
1060 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1061 {
1062 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1063 MOVStreamContext *sc = st->priv_data;
1064 unsigned int i, entries;
1065 int64_t duration=0;
1066 int64_t total_sample_count=0;
1067
1068 get_byte(pb); /* version */
1069 get_be24(pb); /* flags */
1070 entries = get_be32(pb);
1071
1072 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1073
1074 if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1075 return -1;
1076 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1077 if (!sc->stts_data)
1078 return AVERROR(ENOMEM);
1079 sc->stts_count = entries;
1080
1081 for(i=0; i<entries; i++) {
1082 int sample_duration;
1083 int sample_count;
1084
1085 sample_count=get_be32(pb);
1086 sample_duration = get_be32(pb);
1087 sc->stts_data[i].count= sample_count;
1088 sc->stts_data[i].duration= sample_duration;
1089
1090 sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1091
1092 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1093
1094 duration+=(int64_t)sample_duration*sample_count;
1095 total_sample_count+=sample_count;
1096 }
1097
1098 st->nb_frames= total_sample_count;
1099 if(duration)
1100 st->duration= duration;
1101 return 0;
1102 }
1103
1104 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1105 {
1106 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1107 MOVStreamContext *sc = st->priv_data;
1108 unsigned int i, entries;
1109
1110 get_byte(pb); /* version */
1111 get_be24(pb); /* flags */
1112 entries = get_be32(pb);
1113
1114 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1115
1116 if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1117 return -1;
1118 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1119 if (!sc->ctts_data)
1120 return AVERROR(ENOMEM);
1121 sc->ctts_count = entries;
1122
1123 for(i=0; i<entries; i++) {
1124 int count =get_be32(pb);
1125 int duration =get_be32(pb);
1126
1127 if (duration < 0) {
1128 sc->wrong_dts = 1;
1129 st->codec->has_b_frames = 1;
1130 }
1131 sc->ctts_data[i].count = count;
1132 sc->ctts_data[i].duration= duration;
1133
1134 sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1135 }
1136 return 0;
1137 }
1138
1139 static void mov_build_index(MOVContext *mov, AVStream *st)
1140 {
1141 MOVStreamContext *sc = st->priv_data;
1142 int64_t current_offset;
1143 int64_t current_dts = 0;
1144 unsigned int stts_index = 0;
1145 unsigned int stsc_index = 0;
1146 unsigned int stss_index = 0;
1147 unsigned int i, j;
1148
1149 /* adjust first dts according to edit list */
1150 if (sc->time_offset) {
1151 assert(sc->time_offset % sc->time_rate == 0);
1152 current_dts = - (sc->time_offset / sc->time_rate);
1153 }
1154
1155 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1156 if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1157 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1158 unsigned int current_sample = 0;
1159 unsigned int stts_sample = 0;
1160 unsigned int keyframe, sample_size;
1161 unsigned int distance = 0;
1162 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1163
1164 st->nb_frames = sc->sample_count;
1165 for (i = 0; i < sc->chunk_count; i++) {
1166 current_offset = sc->chunk_offsets[i];
1167 if (stsc_index + 1 < sc->stsc_count &&
1168 i + 1 == sc->stsc_data[stsc_index + 1].first)
1169 stsc_index++;
1170 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1171 if (current_sample >= sc->sample_count) {
1172 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1173 return;
1174 }
1175 keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1176 if (keyframe) {
1177 distance = 0;
1178 if (stss_index + 1 < sc->keyframe_count)
1179 stss_index++;
1180 }
1181 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1182 if(sc->pseudo_stream_id == -1 ||
1183 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1184 av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1185 keyframe ? AVINDEX_KEYFRAME : 0);
1186 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1187 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1188 current_offset, current_dts, sample_size, distance, keyframe);
1189 }
1190
1191 current_offset += sample_size;
1192 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1193 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1194 distance++;
1195 stts_sample++;
1196 current_sample++;
1197 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1198 stts_sample = 0;
1199 stts_index++;
1200 }
1201 }
1202 }
1203 } else { /* read whole chunk */
1204 unsigned int chunk_samples, chunk_size, chunk_duration;
1205 unsigned int frames = 1;
1206 for (i = 0; i < sc->chunk_count; i++) {
1207 current_offset = sc->chunk_offsets[i];
1208 if (stsc_index + 1 < sc->stsc_count &&
1209 i + 1 == sc->stsc_data[stsc_index + 1].first)
1210 stsc_index++;
1211 chunk_samples = sc->stsc_data[stsc_index].count;
1212 /* get chunk size, beware of alaw/ulaw/mace */
1213 if (sc->samples_per_frame > 0 &&
1214 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1215 if (sc->samples_per_frame < 160)
1216 chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1217 else {
1218 chunk_size = sc->bytes_per_frame;
1219 frames = chunk_samples / sc->samples_per_frame;
1220 chunk_samples = sc->samples_per_frame;
1221 }
1222 } else
1223 chunk_size = chunk_samples * sc->sample_size;
1224 for (j = 0; j < frames; j++) {
1225 av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1226 /* get chunk duration */
1227 chunk_duration = 0;
1228 while (chunk_samples > 0) {
1229 if (chunk_samples < sc->stts_data[stts_index].count) {
1230 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1231 sc->stts_data[stts_index].count -= chunk_samples;
1232 break;
1233 } else {
1234 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1235 chunk_samples -= sc->stts_data[stts_index].count;
1236 if (stts_index + 1 < sc->stts_count)
1237 stts_index++;
1238 }
1239 }
1240 current_offset += sc->bytes_per_frame;
1241 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1242 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1243 chunk_size, chunk_duration);
1244 assert(chunk_duration % sc->time_rate == 0);
1245 current_dts += chunk_duration / sc->time_rate;
1246 }
1247 }
1248 }
1249 }
1250
1251 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1252 {
1253 AVStream *st;
1254 MOVStreamContext *sc;
1255 int ret;
1256
1257 st = av_new_stream(c->fc, c->fc->nb_streams);
1258 if (!st) return AVERROR(ENOMEM);
1259 sc = av_mallocz(sizeof(MOVStreamContext));
1260 if (!sc) return AVERROR(ENOMEM);
1261
1262 st->priv_data = sc;
1263 st->codec->codec_type = CODEC_TYPE_DATA;
1264 sc->ffindex = st->index;
1265
1266 if ((ret = mov_read_default(c, pb, atom)) < 0)
1267 return ret;
1268
1269 /* sanity checks */
1270 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1271 (!sc->sample_size && !sc->sample_count))) {
1272 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1273 st->index);
1274 return 0;
1275 }
1276
1277 if (!sc->time_rate)
1278 sc->time_rate = 1;
1279 if (!sc->time_scale)
1280 sc->time_scale = c->time_scale;
1281
1282 av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1283
1284 if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1285 !st->codec->frame_size && sc->stts_count == 1) {
1286 st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1287 st->codec->sample_rate, sc->time_scale);
1288 dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1289 }
1290
1291 if (st->duration != AV_NOPTS_VALUE) {
1292 assert(st->duration % sc->time_rate == 0);
1293 st->duration /= sc->time_rate;
1294 }
1295
1296 mov_build_index(c, st);
1297
1298 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1299 if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1300 av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1301 st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1302 } else
1303 sc->pb = c->fc->pb;
1304
1305 switch (st->codec->codec_id) {
1306 #if CONFIG_H261_DECODER
1307 case CODEC_ID_H261:
1308 #endif
1309 #if CONFIG_H263_DECODER
1310 case CODEC_ID_H263:
1311 #endif
1312 #if CONFIG_MPEG4_DECODER
1313 case CODEC_ID_MPEG4:
1314 #endif
1315 st->codec->width = 0; /* let decoder init width/height */
1316 st->codec->height= 0;
1317 break;
1318 }
1319
1320 /* Do not need those anymore. */
1321 av_freep(&sc->chunk_offsets);
1322 av_freep(&sc->stsc_data);
1323 av_freep(&sc->sample_sizes);
1324 av_freep(&sc->keyframes);
1325 av_freep(&sc->stts_data);
1326
1327 return 0;
1328 }
1329
1330 static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1331 {
1332 int ret;
1333 c->itunes_metadata = 1;
1334 ret = mov_read_default(c, pb, atom);
1335 c->itunes_metadata = 0;
1336 return ret;
1337 }
1338
1339 static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1340 {
1341 url_fskip(pb, 4); // version + flags
1342 atom.size -= 4;
1343 return mov_read_default(c, pb, atom);
1344 }
1345
1346 static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1347 {
1348 char track[16];
1349 get_be32(pb); // type
1350 get_be32(pb); // unknown
1351 snprintf(track, sizeof(track), "%d", get_be32(pb));
1352 av_metadata_set(&c->fc->metadata, "track", track);
1353 dprintf(c->fc, "%.4s %s\n", (char*)&atom.type, track);
1354 return 0;
1355 }
1356
1357 static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1358 {
1359 char str[1024], key2[16], language[4] = {0};
1360 const char *key = NULL;
1361 uint16_t str_size;
1362
1363 if (c->itunes_metadata) {
1364 int data_size = get_be32(pb);
1365 int tag = get_le32(pb);
1366 if (tag == MKTAG('d','a','t','a')) {
1367 get_be32(pb); // type
1368 get_be32(pb); // unknown
1369 str_size = data_size - 16;
1370 atom.size -= 16;
1371 } else return 0;
1372 } else {
1373 str_size = get_be16(pb); // string length
1374 ff_mov_lang_to_iso639(get_be16(pb), language);
1375 atom.size -= 4;
1376 }
1377 switch (atom.type) {
1378 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
1379 case MKTAG(0xa9,'a','u','t'):
1380 case MKTAG(0xa9,'A','R','T'):
1381 case MKTAG(0xa9,'w','r','t'): key = "author"; break;
1382 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
1383 case MKTAG(0xa9,'c','m','t'):
1384 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
1385 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
1386 case MKTAG(0xa9,'d','a','y'): key = "year"; break;
1387 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
1388 case MKTAG(0xa9,'t','o','o'):
1389 case MKTAG(0xa9,'e','n','c'): key = "muxer"; break;
1390 }
1391 if (!key)
1392 return 0;
1393 if (atom.size < 0)
1394 return -1;
1395
1396 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
1397 get_buffer(pb, str, str_size);
1398 str[str_size] = 0;
1399 av_metadata_set(&c->fc->metadata, key, str);
1400 if (*language && strcmp(language, "und")) {
1401 snprintf(key2, sizeof(key2), "%s-%s", key, language);
1402 av_metadata_set(&c->fc->metadata, key2, str);
1403 }
1404 dprintf(c->fc, "%.4s %s %d %lld\n", (char*)&atom.type, str, str_size, atom.size);
1405 return 0;
1406 }
1407
1408 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1409 {
1410 int i;
1411 int width;
1412 int height;
1413 int64_t disp_transform[2];
1414 int display_matrix[3][2];
1415 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1416 MOVStreamContext *sc = st->priv_data;
1417 int version = get_byte(pb);
1418
1419 get_be24(pb); /* flags */
1420 /*
1421 MOV_TRACK_ENABLED 0x0001
1422 MOV_TRACK_IN_MOVIE 0x0002
1423 MOV_TRACK_IN_PREVIEW 0x0004
1424 MOV_TRACK_IN_POSTER 0x0008
1425 */
1426
1427 if (version == 1) {
1428 get_be64(pb);
1429 get_be64(pb);
1430 } else {
1431 get_be32(pb); /* creation time */
1432 get_be32(pb); /* modification time */
1433 }
1434 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1435 get_be32(pb); /* reserved */
1436
1437 /* highlevel (considering edits) duration in movie timebase */
1438 (version == 1) ? get_be64(pb) : get_be32(pb);
1439 get_be32(pb); /* reserved */
1440 get_be32(pb); /* reserved */
1441
1442 get_be16(pb); /* layer */
1443 get_be16(pb); /* alternate group */
1444 get_be16(pb); /* volume */
1445 get_be16(pb); /* reserved */
1446
1447 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1448 // they're kept in fixed point format through all calculations
1449 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1450 for (i = 0; i < 3; i++) {
1451 display_matrix[i][0] = get_be32(pb); // 16.16 fixed point
1452 display_matrix[i][1] = get_be32(pb); // 16.16 fixed point
1453 get_be32(pb); // 2.30 fixed point (not used)
1454 }
1455
1456 width = get_be32(pb); // 16.16 fixed point track width
1457 height = get_be32(pb); // 16.16 fixed point track height
1458 sc->width = width >> 16;
1459 sc->height = height >> 16;
1460
1461 //transform the display width/height according to the matrix
1462 // skip this if the display matrix is the default identity matrix
1463 // to keep the same scale, use [width height 1<<16]
1464 if (width && height &&
1465 (display_matrix[0][0] != 65536 || display_matrix[0][1] ||
1466 display_matrix[1][0] || display_matrix[1][1] != 65536 ||
1467 display_matrix[2][0] || display_matrix[2][1])) {
1468 for (i = 0; i < 2; i++)
1469 disp_transform[i] =
1470 (int64_t) width * display_matrix[0][i] +
1471 (int64_t) height * display_matrix[1][i] +
1472 ((int64_t) display_matrix[2][i] << 16);
1473
1474 //sample aspect ratio is new width/height divided by old width/height
1475 st->sample_aspect_ratio = av_d2q(
1476 ((double) disp_transform[0] * height) /
1477 ((double) disp_transform[1] * width), INT_MAX);
1478 }
1479 return 0;
1480 }
1481
1482 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1483 {
1484 MOVFragment *frag = &c->fragment;
1485 MOVTrackExt *trex = NULL;
1486 int flags, track_id, i;
1487
1488 get_byte(pb); /* version */
1489 flags = get_be24(pb);
1490
1491 track_id = get_be32(pb);
1492 if (!track_id)
1493 return -1;
1494 frag->track_id = track_id;
1495 for (i = 0; i < c->trex_count; i++)
1496 if (c->trex_data[i].track_id == frag->track_id) {
1497 trex = &c->trex_data[i];
1498 break;
1499 }
1500 if (!trex) {
1501 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1502 return -1;
1503 }
1504
1505 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1506 else frag->base_data_offset = frag->moof_offset;
1507 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1508 else frag->stsd_id = trex->stsd_id;
1509
1510 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1511 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1512 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1513 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1514 return 0;
1515 }
1516
1517 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1518 {
1519 MOVTrackExt *trex;
1520
1521 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1522 return -1;
1523 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1524 if (!trex)
1525 return AVERROR(ENOMEM);
1526 c->trex_data = trex;
1527 trex = &c->trex_data[c->trex_count++];
1528 get_byte(pb); /* version */
1529 get_be24(pb); /* flags */
1530 trex->track_id = get_be32(pb);
1531 trex->stsd_id = get_be32(pb);
1532 trex->duration = get_be32(pb);
1533 trex->size = get_be32(pb);
1534 trex->flags = get_be32(pb);
1535 return 0;
1536 }
1537
1538 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1539 {
1540 MOVFragment *frag = &c->fragment;
1541 AVStream *st = NULL;
1542 MOVStreamContext *sc;
1543 uint64_t offset;
1544 int64_t dts;
1545 int data_offset = 0;
1546 unsigned entries, first_sample_flags = frag->flags;
1547 int flags, distance, i;
1548
1549 for (i = 0; i < c->fc->nb_streams; i++) {
1550 if (c->fc->streams[i]->id == frag->track_id) {
1551 st = c->fc->streams[i];
1552 break;
1553 }
1554 }
1555 if (!st) {
1556 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1557 return -1;
1558 }
1559 sc = st->priv_data;
1560 if (sc->pseudo_stream_id+1 != frag->stsd_id)
1561 return 0;
1562 get_byte(pb); /* version */
1563 flags = get_be24(pb);
1564 entries = get_be32(pb);
1565 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1566 if (flags & 0x001) data_offset = get_be32(pb);
1567 if (flags & 0x004) first_sample_flags = get_be32(pb);
1568 if (flags & 0x800) {
1569 MOVStts *ctts_data;
1570 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1571 return -1;
1572 ctts_data = av_realloc(sc->ctts_data,
1573 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1574 if (!ctts_data)
1575 return AVERROR(ENOMEM);
1576 sc->ctts_data = ctts_data;
1577 }
1578 dts = st->duration;
1579 offset = frag->base_data_offset + data_offset;
1580 distance = 0;
1581 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1582 for (i = 0; i < entries; i++) {
1583 unsigned sample_size = frag->size;
1584 int sample_flags = i ? frag->flags : first_sample_flags;
1585 unsigned sample_duration = frag->duration;
1586 int keyframe;
1587
1588 if (flags & 0x100) sample_duration = get_be32(pb);
1589 if (flags & 0x200) sample_size = get_be32(pb);
1590 if (flags & 0x400) sample_flags = get_be32(pb);
1591 if (flags & 0x800) {
1592 sc->ctts_data[sc->ctts_count].count = 1;
1593 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1594 sc->ctts_count++;
1595 }
1596 if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1597 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1598 distance = 0;
1599 av_add_index_entry(st, offset, dts, sample_size, distance,
1600 keyframe ? AVINDEX_KEYFRAME : 0);
1601 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1602 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1603 offset, dts, sample_size, distance, keyframe);
1604 distance++;
1605 assert(sample_duration % sc->time_rate == 0);
1606 dts += sample_duration / sc->time_rate;
1607 offset += sample_size;
1608 }
1609 frag->moof_offset = offset;
1610 st->duration = dts;
1611 return 0;
1612 }
1613
1614 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1615 /* like the files created with Adobe Premiere 5.0, for samples see */
1616 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1617 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1618 {
1619 int err;
1620
1621 if (atom.size < 8)
1622 return 0; /* continue */
1623 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1624 url_fskip(pb, atom.size - 4);
1625 return 0;
1626 }
1627 atom.type = get_le32(pb);
1628 atom.offset += 8;
1629 atom.size -= 8;
1630 if (atom.type != MKTAG('m','d','a','t')) {
1631 url_fskip(pb, atom.size);
1632 return 0;
1633 }
1634 err = mov_read_mdat(c, pb, atom);
1635 return err;
1636 }
1637
1638 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1639 {
1640 #if CONFIG_ZLIB
1641 ByteIOContext ctx;
1642 uint8_t *cmov_data;
1643 uint8_t *moov_data; /* uncompressed data */
1644 long cmov_len, moov_len;
1645 int ret = -1;
1646
1647 get_be32(pb); /* dcom atom */
1648 if (get_le32(pb) != MKTAG('d','c','o','m'))
1649 return -1;
1650 if (get_le32(pb) != MKTAG('z','l','i','b')) {
1651 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
1652 return -1;
1653 }
1654 get_be32(pb); /* cmvd atom */
1655 if (get_le32(pb) != MKTAG('c','m','v','d'))
1656 return -1;
1657 moov_len = get_be32(pb); /* uncompressed size */
1658 cmov_len = atom.size - 6 * 4;
1659
1660 cmov_data = av_malloc(cmov_len);
1661 if (!cmov_data)
1662 return AVERROR(ENOMEM);
1663 moov_data = av_malloc(moov_len);
1664 if (!moov_data) {
1665 av_free(cmov_data);
1666 return AVERROR(ENOMEM);
1667 }
1668 get_buffer(pb, cmov_data, cmov_len);
1669 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1670 goto free_and_return;
1671 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1672 goto free_and_return;
1673 atom.type = MKTAG('m','o','o','v');
1674 atom.offset = 0;
1675 atom.size = moov_len;
1676 #ifdef DEBUG
1677 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1678 #endif
1679 ret = mov_read_default(c, &ctx, atom);
1680 free_and_return:
1681 av_free(moov_data);
1682 av_free(cmov_data);
1683 return ret;
1684 #else
1685 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1686 return -1;
1687 #endif
1688 }
1689
1690 /* edit list atom */
1691 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1692 {
1693 MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1694 int i, edit_count;
1695
1696 get_byte(pb); /* version */
1697 get_be24(pb); /* flags */
1698 edit_count = get_be32(pb); /* entries */
1699
1700 for(i=0; i<edit_count; i++){
1701 int time;
1702 get_be32(pb); /* Track duration */
1703 time = get_be32(pb); /* Media time */
1704 get_be32(pb); /* Media rate */
1705 if (i == 0 && time != -1) {
1706 sc->time_offset = time;
1707 sc->time_rate = av_gcd(sc->time_rate, time);
1708 }
1709 }
1710
1711 if(edit_count > 1)
1712 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1713 "a/v desync might occur, patch welcome\n");
1714
1715 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
1716 return 0;
1717 }
1718
1719 static const MOVParseTableEntry mov_default_parse_table[] = {
1720 { MKTAG('a','v','s','s'), mov_read_extradata },
1721 { MKTAG('c','o','6','4'), mov_read_stco },
1722 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1723 { MKTAG('d','i','n','f'), mov_read_default },
1724 { MKTAG('d','r','e','f'), mov_read_dref },
1725 { MKTAG('e','d','t','s'), mov_read_default },
1726 { MKTAG('e','l','s','t'), mov_read_elst },
1727 { MKTAG('e','n','d','a'), mov_read_enda },
1728 { MKTAG('f','i','e','l'), mov_read_extradata },
1729 { MKTAG('f','t','y','p'), mov_read_ftyp },
1730 { MKTAG('g','l','b','l'), mov_read_glbl },
1731 { MKTAG('h','d','l','r'), mov_read_hdlr },
1732 { MKTAG('i','l','s','t'), mov_read_ilst },
1733 { MKTAG('j','p','2','h'), mov_read_extradata },
1734 { MKTAG('m','d','a','t'), mov_read_mdat },
1735 { MKTAG('m','d','h','d'), mov_read_mdhd },
1736 { MKTAG('m','d','i','a'), mov_read_default },
1737 { MKTAG('m','e','t','a'), mov_read_meta },
1738 { MKTAG('m','i','n','f'), mov_read_default },
1739 { MKTAG('m','o','o','f'), mov_read_moof },
1740 { MKTAG('m','o','o','v'), mov_read_moov },
1741 { MKTAG('m','v','e','x'), mov_read_default },
1742 { MKTAG('m','v','h','d'), mov_read_mvhd },
1743 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1744 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1745 { MKTAG('a','v','c','C'), mov_read_glbl },
1746 { MKTAG('p','a','s','p'), mov_read_pasp },
1747 { MKTAG('s','t','b','l'), mov_read_default },
1748 { MKTAG('s','t','c','o'), mov_read_stco },
1749 { MKTAG('s','t','s','c'), mov_read_stsc },
1750 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1751 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1752 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1753 { MKTAG('s','t','t','s'), mov_read_stts },
1754 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1755 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1756 { MKTAG('t','r','a','k'), mov_read_trak },
1757 { MKTAG('t','r','a','f'), mov_read_default },
1758 { MKTAG('t','r','e','x'), mov_read_trex },
1759 { MKTAG('t','r','k','n'), mov_read_trkn },
1760 { MKTAG('t','r','u','n'), mov_read_trun },
1761 { MKTAG('u','d','t','a'), mov_read_default },
1762 { MKTAG('w','a','v','e'), mov_read_wave },
1763 { MKTAG('e','s','d','s'), mov_read_esds },
1764 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1765 { MKTAG('c','m','o','v'), mov_read_cmov },
1766 { MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
1767 { MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
1768 { MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
1769 { MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1770 { MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1771 { MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
1772 { MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
1773 { MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
1774 { MKTAG(0xa9,'a','u','t'), mov_read_udta_string },
1775 { MKTAG(0xa9,'d','a','y'), mov_read_udta_string },
1776 { MKTAG(0xa9,'g','e','n'), mov_read_udta_string },
1777 { MKTAG(0xa9,'e','n','c'), mov_read_udta_string },
1778 { MKTAG(0xa9,'t','o','o'), mov_read_udta_string },
1779 { 0, NULL }
1780 };
1781
1782 static int mov_probe(AVProbeData *p)
1783 {
1784 unsigned int offset;
1785 uint32_t tag;
1786 int score = 0;
1787
1788 /* check file header */
1789 offset = 0;
1790 for(;;) {
1791 /* ignore invalid offset */
1792 if ((offset + 8) > (unsigned int)p->buf_size)
1793 return score;
1794 tag = AV_RL32(p->buf + offset + 4);
1795 switch(tag) {
1796 /* check for obvious tags */
1797 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1798 case MKTAG('m','o','o','v'):
1799 case MKTAG('m','d','a','t'):
1800 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1801 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1802 case MKTAG('f','t','y','p'):
1803 return AVPROBE_SCORE_MAX;
1804 /* those are more common words, so rate then a bit less */
1805 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1806 case MKTAG('w','i','d','e'):
1807 case MKTAG('f','r','e','e'):
1808 case MKTAG('j','u','n','k'):
1809 case MKTAG('p','i','c','t'):
1810 return AVPROBE_SCORE_MAX - 5;
1811 case MKTAG(0x82,0x82,0x7f,0x7d):
1812 case MKTAG('s','k','i','p'):
1813 case MKTAG('u','u','i','d'):
1814 case MKTAG('p','r','f','l'):
1815 offset = AV_RB32(p->buf+offset) + offset;
1816 /* if we only find those cause probedata is too small at least rate them */
1817 score = AVPROBE_SCORE_MAX - 50;
1818 break;
1819 default:
1820 /* unrecognized tag */
1821 return score;
1822 }
1823 }
1824 return score;
1825 }
1826
1827 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1828 {
1829 MOVContext *mov = s->priv_data;
1830 ByteIOContext *pb = s->pb;
1831 int err;
1832 MOVAtom atom = { 0, 0, 0 };
1833
1834 mov->fc = s;
1835 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1836 if(!url_is_streamed(pb))
1837 atom.size = url_fsize(pb);
1838 else
1839 atom.size = INT64_MAX;
1840
1841 /* check MOV header */
1842 if ((err = mov_read_default(mov, pb, atom)) < 0) {
1843 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1844 return err;
1845 }
1846 if (!mov->found_moov) {
1847 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1848 return -1;
1849 }
1850 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1851
1852 return 0;
1853 }
1854
1855 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1856 {
1857 MOVContext *mov = s->priv_data;
1858 MOVStreamContext *sc = 0;
1859 AVIndexEntry *sample = 0;
1860 int64_t best_dts = INT64_MAX;
1861 int i, ret;
1862 retry:
1863 for (i = 0; i < s->nb_streams; i++) {
1864 AVStream *st = s->streams[i];
1865 MOVStreamContext *msc = st->priv_data;
1866 if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < st->nb_index_entries) {
1867 AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1868 int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1869 AV_TIME_BASE, msc->time_scale);
1870 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1871 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1872 (!url_is_streamed(s->pb) &&
1873 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1874 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1875 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1876 sample = current_sample;
1877 best_dts = dts;
1878 sc = msc;
1879 }
1880 }
1881 }
1882 if (!sample) {
1883 mov->found_mdat = 0;
1884 if (!url_is_streamed(s->pb) ||
1885 mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1886 url_feof(s->pb))
1887 return -1;
1888 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1889 goto retry;
1890 }
1891 /* must be done just before reading, to avoid infinite loop on sample */
1892 sc->current_sample++;
1893 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1894 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1895 sc->ffindex, sample->pos);
1896 return -1;
1897 }
1898 ret = av_get_packet(sc->pb, pkt, sample->size);
1899 if (ret < 0)
1900 return ret;
1901 #if CONFIG_DV_DEMUXER
1902 if (mov->dv_demux && sc->dv_audio_container) {
1903 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1904 av_free(pkt->data);
1905 pkt->size = 0;
1906 if (dv_get_packet(mov->dv_demux, pkt) < 0)
1907 return -1;
1908 }
1909 #endif
1910 pkt->stream_index = sc->ffindex;
1911 pkt->dts = sample->timestamp;
1912 if (sc->ctts_data) {
1913 assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);
1914 pkt->pts = pkt->dts + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;
1915 /* update ctts context */
1916 sc->ctts_sample++;
1917 if (sc->ctts_index < sc->ctts_count &&
1918 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
1919 sc->ctts_index++;
1920 sc->ctts_sample = 0;
1921 }
1922 if (sc->wrong_dts)
1923 pkt->dts = AV_NOPTS_VALUE;
1924 } else {
1925 AVStream *st = s->streams[sc->ffindex];
1926 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
1927 st->index_entries[sc->current_sample].timestamp : st->duration;
1928 pkt->duration = next_dts - pkt->dts;
1929 pkt->pts = pkt->dts;
1930 }
1931 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1932 pkt->pos = sample->pos;
1933 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1934 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1935 return 0;
1936 }
1937
1938 static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1939 {
1940 MOVStreamContext *sc = st->priv_data;
1941 int sample, time_sample;
1942 int i;
1943
1944 sample = av_index_search_timestamp(st, timestamp, flags);
1945 dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1946 if (sample < 0) /* not sure what to do */
1947 return -1;
1948 sc->current_sample = sample;
1949 dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1950 /* adjust ctts index */
1951 if (sc->ctts_data) {
1952 time_sample = 0;
1953 for (i = 0; i < sc->ctts_count; i++) {
1954 int next = time_sample + sc->ctts_data[i].count;
1955 if (next > sc->current_sample) {
1956 sc->ctts_index = i;
1957 sc->ctts_sample = sc->current_sample - time_sample;
1958 break;
1959 }
1960 time_sample = next;
1961 }
1962 }
1963 return sample;
1964 }
1965
1966 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1967 {
1968 AVStream *st;
1969 int64_t seek_timestamp, timestamp;
1970 int sample;
1971 int i;
1972
1973 if (stream_index >= s->nb_streams)
1974 return -1;
1975 if (sample_time < 0)
1976 sample_time = 0;
1977
1978 st = s->streams[stream_index];
1979 sample = mov_seek_stream(st, sample_time, flags);
1980 if (sample < 0)
1981 return -1;
1982
1983 /* adjust seek timestamp to found sample timestamp */
1984 seek_timestamp = st->index_entries[sample].timestamp;
1985
1986 for (i = 0; i < s->nb_streams; i++) {
1987 st = s->streams[i];
1988 if (stream_index == i || st->discard == AVDISCARD_ALL)
1989 continue;
1990
1991 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1992 mov_seek_stream(st, timestamp, flags);
1993 }
1994 return 0;
1995 }
1996
1997 static int mov_read_close(AVFormatContext *s)
1998 {
1999 MOVContext *mov = s->priv_data;
2000 int i, j;
2001
2002 for (i = 0; i < s->nb_streams; i++) {
2003 AVStream *st = s->streams[i];
2004 MOVStreamContext *sc = st->priv_data;
2005
2006 av_freep(&sc->ctts_data);
2007 for (j = 0; j < sc->drefs_count; j++)
2008 av_freep(&sc->drefs[j].path);
2009 av_freep(&sc->drefs);
2010 if (sc->pb && sc->pb != s->pb)
2011 url_fclose(sc->pb);
2012
2013 av_freep(&st->codec->palctrl);
2014 }
2015
2016 if (mov->dv_demux) {
2017 for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2018 av_freep(&mov->dv_fctx->streams[i]->codec);
2019 av_freep(&mov->dv_fctx->streams[i]);
2020 }
2021 av_freep(&mov->dv_fctx);
2022 av_freep(&mov->dv_demux);
2023 }
2024
2025 av_freep(&mov->trex_data);
2026
2027 return 0;
2028 }
2029
2030 AVInputFormat mov_demuxer = {
2031 "mov,mp4,m4a,3gp,3g2,mj2",
2032 NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2033 sizeof(MOVContext),
2034 mov_probe,
2035 mov_read_header,
2036 mov_read_packet,
2037 mov_read_close,
2038 mov_read_seek,
2039 };
ffmpeg with support for matroska ordered chapters