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AVFrame: add side data.
[FFMpeg-mirror/mplayer-patches.git] / libavformat / mov.c
blob7fe0548daad121fcfa029d2e7b6d311c2da847b2
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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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 //#define MOV_EXPORT_ALL_METADATA
27
28 #include "libavutil/attributes.h"
29 #include "libavutil/channel_layout.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/intfloat.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/dict.h"
35 #include "libavcodec/ac3tab.h"
36 #include "avformat.h"
37 #include "internal.h"
38 #include "avio_internal.h"
39 #include "riff.h"
40 #include "isom.h"
41 #include "libavcodec/get_bits.h"
42 #include "id3v1.h"
43 #include "mov_chan.h"
44
45 #if CONFIG_ZLIB
46 #include <zlib.h>
47 #endif
48
49 /*
50 * First version by Francois Revol revol@free.fr
51 * Seek function by Gael Chardon gael.dev@4now.net
52 */
53
54 #include "qtpalette.h"
55
56
57 #undef NDEBUG
58 #include <assert.h>
59
60 /* those functions parse an atom */
61 /* links atom IDs to parse functions */
62 typedef struct MOVParseTableEntry {
63 uint32_t type;
64 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
65 } MOVParseTableEntry;
66
67 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
68
69 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
70 unsigned len, const char *key)
71 {
72 char buf[16];
73
74 short current, total = 0;
75 avio_rb16(pb); // unknown
76 current = avio_rb16(pb);
77 if (len >= 6)
78 total = avio_rb16(pb);
79 if (!total)
80 snprintf(buf, sizeof(buf), "%d", current);
81 else
82 snprintf(buf, sizeof(buf), "%d/%d", current, total);
83 av_dict_set(&c->fc->metadata, key, buf, 0);
84
85 return 0;
86 }
87
88 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
89 unsigned len, const char *key)
90 {
91 char buf[16];
92
93 /* bypass padding bytes */
94 avio_r8(pb);
95 avio_r8(pb);
96 avio_r8(pb);
97
98 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
99 av_dict_set(&c->fc->metadata, key, buf, 0);
100
101 return 0;
102 }
103
104 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
105 unsigned len, const char *key)
106 {
107 char buf[16];
108
109 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
110 av_dict_set(&c->fc->metadata, key, buf, 0);
111
112 return 0;
113 }
114
115 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
116 unsigned len, const char *key)
117 {
118 short genre;
119 char buf[20];
120
121 avio_r8(pb); // unknown
122
123 genre = avio_r8(pb);
124 if (genre < 1 || genre > ID3v1_GENRE_MAX)
125 return 0;
126 snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
127 av_dict_set(&c->fc->metadata, key, buf, 0);
128
129 return 0;
130 }
131
132 static const uint32_t mac_to_unicode[128] = {
133 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
134 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
135 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
136 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
137 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
138 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
139 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
140 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
141 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
142 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
143 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
144 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
145 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
146 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
147 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
148 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
149 };
150
151 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
152 char *dst, int dstlen)
153 {
154 char *p = dst;
155 char *end = dst+dstlen-1;
156 int i;
157
158 for (i = 0; i < len; i++) {
159 uint8_t t, c = avio_r8(pb);
160 if (c < 0x80 && p < end)
161 *p++ = c;
162 else
163 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
164 }
165 *p = 0;
166 return p - dst;
167 }
168
169 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
170 {
171 AVPacket pkt;
172 AVStream *st;
173 MOVStreamContext *sc;
174 enum AVCodecID id;
175 int ret;
176
177 switch (type) {
178 case 0xd: id = AV_CODEC_ID_MJPEG; break;
179 case 0xe: id = AV_CODEC_ID_PNG; break;
180 case 0x1b: id = AV_CODEC_ID_BMP; break;
181 default:
182 av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
183 avio_skip(pb, len);
184 return 0;
185 }
186
187 st = avformat_new_stream(c->fc, NULL);
188 if (!st)
189 return AVERROR(ENOMEM);
190 sc = av_mallocz(sizeof(*sc));
191 if (!sc)
192 return AVERROR(ENOMEM);
193 st->priv_data = sc;
194
195 ret = av_get_packet(pb, &pkt, len);
196 if (ret < 0)
197 return ret;
198
199 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
200
201 st->attached_pic = pkt;
202 st->attached_pic.stream_index = st->index;
203 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
204
205 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
206 st->codec->codec_id = id;
207
208 return 0;
209 }
210
211 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
212 {
213 #ifdef MOV_EXPORT_ALL_METADATA
214 char tmp_key[5];
215 #endif
216 char str[1024], key2[16], language[4] = {0};
217 const char *key = NULL;
218 uint16_t langcode = 0;
219 uint32_t data_type = 0, str_size;
220 int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
221
222 switch (atom.type) {
223 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
224 case MKTAG(0xa9,'a','u','t'):
225 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
226 case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
227 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
228 case MKTAG( 'c','p','r','t'):
229 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
230 case MKTAG(0xa9,'c','m','t'):
231 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
232 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
233 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
234 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
235 case MKTAG( 'g','n','r','e'): key = "genre";
236 parse = mov_metadata_gnre; break;
237 case MKTAG(0xa9,'t','o','o'):
238 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
239 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
240 case MKTAG( 'd','e','s','c'): key = "description";break;
241 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
242 case MKTAG( 't','v','s','h'): key = "show"; break;
243 case MKTAG( 't','v','e','n'): key = "episode_id";break;
244 case MKTAG( 't','v','n','n'): key = "network"; break;
245 case MKTAG( 't','r','k','n'): key = "track";
246 parse = mov_metadata_track_or_disc_number; break;
247 case MKTAG( 'd','i','s','k'): key = "disc";
248 parse = mov_metadata_track_or_disc_number; break;
249 case MKTAG( 't','v','e','s'): key = "episode_sort";
250 parse = mov_metadata_int8_bypass_padding; break;
251 case MKTAG( 't','v','s','n'): key = "season_number";
252 parse = mov_metadata_int8_bypass_padding; break;
253 case MKTAG( 's','t','i','k'): key = "media_type";
254 parse = mov_metadata_int8_no_padding; break;
255 case MKTAG( 'h','d','v','d'): key = "hd_video";
256 parse = mov_metadata_int8_no_padding; break;
257 case MKTAG( 'p','g','a','p'): key = "gapless_playback";
258 parse = mov_metadata_int8_no_padding; break;
259 }
260
261 if (c->itunes_metadata && atom.size > 8) {
262 int data_size = avio_rb32(pb);
263 int tag = avio_rl32(pb);
264 if (tag == MKTAG('d','a','t','a')) {
265 data_type = avio_rb32(pb); // type
266 avio_rb32(pb); // unknown
267 str_size = data_size - 16;
268 atom.size -= 16;
269
270 if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
271 int ret = mov_read_covr(c, pb, data_type, str_size);
272 if (ret < 0) {
273 av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
274 return ret;
275 }
276 }
277 } else return 0;
278 } else if (atom.size > 4 && key && !c->itunes_metadata) {
279 str_size = avio_rb16(pb); // string length
280 langcode = avio_rb16(pb);
281 ff_mov_lang_to_iso639(langcode, language);
282 atom.size -= 4;
283 } else
284 str_size = atom.size;
285
286 #ifdef MOV_EXPORT_ALL_METADATA
287 if (!key) {
288 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
289 key = tmp_key;
290 }
291 #endif
292
293 if (!key)
294 return 0;
295 if (atom.size < 0)
296 return AVERROR_INVALIDDATA;
297
298 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
299
300 if (parse)
301 parse(c, pb, str_size, key);
302 else {
303 if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
304 mov_read_mac_string(c, pb, str_size, str, sizeof(str));
305 } else {
306 avio_read(pb, str, str_size);
307 str[str_size] = 0;
308 }
309 av_dict_set(&c->fc->metadata, key, str, 0);
310 if (*language && strcmp(language, "und")) {
311 snprintf(key2, sizeof(key2), "%s-%s", key, language);
312 av_dict_set(&c->fc->metadata, key2, str, 0);
313 }
314 }
315 av_dlog(c->fc, "lang \"%3s\" ", language);
316 av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
317 key, str, (char*)&atom.type, str_size, atom.size);
318
319 return 0;
320 }
321
322 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
323 {
324 int64_t start;
325 int i, nb_chapters, str_len, version;
326 char str[256+1];
327
328 if ((atom.size -= 5) < 0)
329 return 0;
330
331 version = avio_r8(pb);
332 avio_rb24(pb);
333 if (version)
334 avio_rb32(pb); // ???
335 nb_chapters = avio_r8(pb);
336
337 for (i = 0; i < nb_chapters; i++) {
338 if (atom.size < 9)
339 return 0;
340
341 start = avio_rb64(pb);
342 str_len = avio_r8(pb);
343
344 if ((atom.size -= 9+str_len) < 0)
345 return 0;
346
347 avio_read(pb, str, str_len);
348 str[str_len] = 0;
349 avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
350 }
351 return 0;
352 }
353
354 #define MIN_DATA_ENTRY_BOX_SIZE 12
355 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
356 {
357 AVStream *st;
358 MOVStreamContext *sc;
359 int entries, i, j;
360
361 if (c->fc->nb_streams < 1)
362 return 0;
363 st = c->fc->streams[c->fc->nb_streams-1];
364 sc = st->priv_data;
365
366 avio_rb32(pb); // version + flags
367 entries = avio_rb32(pb);
368 if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
369 entries >= UINT_MAX / sizeof(*sc->drefs))
370 return AVERROR_INVALIDDATA;
371 av_free(sc->drefs);
372 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
373 if (!sc->drefs)
374 return AVERROR(ENOMEM);
375 sc->drefs_count = entries;
376
377 for (i = 0; i < sc->drefs_count; i++) {
378 MOVDref *dref = &sc->drefs[i];
379 uint32_t size = avio_rb32(pb);
380 int64_t next = avio_tell(pb) + size - 4;
381
382 if (size < 12)
383 return AVERROR_INVALIDDATA;
384
385 dref->type = avio_rl32(pb);
386 avio_rb32(pb); // version + flags
387 av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
388
389 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
390 /* macintosh alias record */
391 uint16_t volume_len, len;
392 int16_t type;
393
394 avio_skip(pb, 10);
395
396 volume_len = avio_r8(pb);
397 volume_len = FFMIN(volume_len, 27);
398 avio_read(pb, dref->volume, 27);
399 dref->volume[volume_len] = 0;
400 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
401
402 avio_skip(pb, 12);
403
404 len = avio_r8(pb);
405 len = FFMIN(len, 63);
406 avio_read(pb, dref->filename, 63);
407 dref->filename[len] = 0;
408 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
409
410 avio_skip(pb, 16);
411
412 /* read next level up_from_alias/down_to_target */
413 dref->nlvl_from = avio_rb16(pb);
414 dref->nlvl_to = avio_rb16(pb);
415 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
416 dref->nlvl_from, dref->nlvl_to);
417
418 avio_skip(pb, 16);
419
420 for (type = 0; type != -1 && avio_tell(pb) < next; ) {
421 if (pb->eof_reached)
422 return AVERROR_EOF;
423 type = avio_rb16(pb);
424 len = avio_rb16(pb);
425 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
426 if (len&1)
427 len += 1;
428 if (type == 2) { // absolute path
429 av_free(dref->path);
430 dref->path = av_mallocz(len+1);
431 if (!dref->path)
432 return AVERROR(ENOMEM);
433 avio_read(pb, dref->path, len);
434 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
435 len -= volume_len;
436 memmove(dref->path, dref->path+volume_len, len);
437 dref->path[len] = 0;
438 }
439 for (j = 0; j < len; j++)
440 if (dref->path[j] == ':')
441 dref->path[j] = '/';
442 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
443 } else if (type == 0) { // directory name
444 av_free(dref->dir);
445 dref->dir = av_malloc(len+1);
446 if (!dref->dir)
447 return AVERROR(ENOMEM);
448 avio_read(pb, dref->dir, len);
449 dref->dir[len] = 0;
450 for (j = 0; j < len; j++)
451 if (dref->dir[j] == ':')
452 dref->dir[j] = '/';
453 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
454 } else
455 avio_skip(pb, len);
456 }
457 }
458 avio_seek(pb, next, SEEK_SET);
459 }
460 return 0;
461 }
462
463 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
464 {
465 AVStream *st;
466 uint32_t type;
467 uint32_t av_unused ctype;
468
469 if (c->fc->nb_streams < 1) // meta before first trak
470 return 0;
471
472 st = c->fc->streams[c->fc->nb_streams-1];
473
474 avio_r8(pb); /* version */
475 avio_rb24(pb); /* flags */
476
477 /* component type */
478 ctype = avio_rl32(pb);
479 type = avio_rl32(pb); /* component subtype */
480
481 av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
482 av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
483
484 if (type == MKTAG('v','i','d','e'))
485 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
486 else if (type == MKTAG('s','o','u','n'))
487 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
488 else if (type == MKTAG('m','1','a',' '))
489 st->codec->codec_id = AV_CODEC_ID_MP2;
490 else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
491 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
492
493 avio_rb32(pb); /* component manufacture */
494 avio_rb32(pb); /* component flags */
495 avio_rb32(pb); /* component flags mask */
496
497 return 0;
498 }
499
500 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
501 {
502 AVStream *st;
503 int tag;
504
505 if (fc->nb_streams < 1)
506 return 0;
507 st = fc->streams[fc->nb_streams-1];
508
509 avio_rb32(pb); /* version + flags */
510 ff_mp4_read_descr(fc, pb, &tag);
511 if (tag == MP4ESDescrTag) {
512 ff_mp4_parse_es_descr(pb, NULL);
513 } else
514 avio_rb16(pb); /* ID */
515
516 ff_mp4_read_descr(fc, pb, &tag);
517 if (tag == MP4DecConfigDescrTag)
518 ff_mp4_read_dec_config_descr(fc, st, pb);
519 return 0;
520 }
521
522 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
523 {
524 return ff_mov_read_esds(c->fc, pb, atom);
525 }
526
527 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
528 {
529 AVStream *st;
530 int ac3info, acmod, lfeon, bsmod;
531
532 if (c->fc->nb_streams < 1)
533 return 0;
534 st = c->fc->streams[c->fc->nb_streams-1];
535
536 ac3info = avio_rb24(pb);
537 bsmod = (ac3info >> 14) & 0x7;
538 acmod = (ac3info >> 11) & 0x7;
539 lfeon = (ac3info >> 10) & 0x1;
540 st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
541 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
542 if (lfeon)
543 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
544 st->codec->audio_service_type = bsmod;
545 if (st->codec->channels > 1 && bsmod == 0x7)
546 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
547
548 return 0;
549 }
550
551 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
552 {
553 AVStream *st;
554 int eac3info, acmod, lfeon, bsmod;
555
556 if (c->fc->nb_streams < 1)
557 return 0;
558 st = c->fc->streams[c->fc->nb_streams-1];
559
560 /* No need to parse fields for additional independent substreams and its
561 * associated dependent substreams since libavcodec's E-AC-3 decoder
562 * does not support them yet. */
563 avio_rb16(pb); /* data_rate and num_ind_sub */
564 eac3info = avio_rb24(pb);
565 bsmod = (eac3info >> 12) & 0x1f;
566 acmod = (eac3info >> 9) & 0x7;
567 lfeon = (eac3info >> 8) & 0x1;
568 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
569 if (lfeon)
570 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
571 st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
572 st->codec->audio_service_type = bsmod;
573 if (st->codec->channels > 1 && bsmod == 0x7)
574 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
575
576 return 0;
577 }
578
579 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
580 {
581 AVStream *st;
582
583 if (c->fc->nb_streams < 1)
584 return 0;
585 st = c->fc->streams[c->fc->nb_streams-1];
586
587 if (atom.size < 16)
588 return 0;
589
590 ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
591
592 return 0;
593 }
594
595 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
596 {
597 AVStream *st;
598
599 if (c->fc->nb_streams < 1)
600 return 0;
601 st = c->fc->streams[c->fc->nb_streams-1];
602
603 ff_get_wav_header(pb, st->codec, atom.size);
604
605 return 0;
606 }
607
608 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
609 {
610 const int num = avio_rb32(pb);
611 const int den = avio_rb32(pb);
612 AVStream *st;
613
614 if (c->fc->nb_streams < 1)
615 return 0;
616 st = c->fc->streams[c->fc->nb_streams-1];
617
618 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
619 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
620 av_log(c->fc, AV_LOG_WARNING,
621 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
622 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
623 num, den);
624 } else if (den != 0) {
625 st->sample_aspect_ratio.num = num;
626 st->sample_aspect_ratio.den = den;
627 }
628 return 0;
629 }
630
631 /* this atom contains actual media data */
632 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
633 {
634 if (atom.size == 0) /* wrong one (MP4) */
635 return 0;
636 c->found_mdat=1;
637 return 0; /* now go for moov */
638 }
639
640 /* read major brand, minor version and compatible brands and store them as metadata */
641 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
642 {
643 uint32_t minor_ver;
644 int comp_brand_size;
645 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
646 char* comp_brands_str;
647 uint8_t type[5] = {0};
648
649 avio_read(pb, type, 4);
650 if (strcmp(type, "qt "))
651 c->isom = 1;
652 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
653 av_dict_set(&c->fc->metadata, "major_brand", type, 0);
654 minor_ver = avio_rb32(pb); /* minor version */
655 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
656 av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
657
658 comp_brand_size = atom.size - 8;
659 if (comp_brand_size < 0)
660 return AVERROR_INVALIDDATA;
661 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
662 if (!comp_brands_str)
663 return AVERROR(ENOMEM);
664 avio_read(pb, comp_brands_str, comp_brand_size);
665 comp_brands_str[comp_brand_size] = 0;
666 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
667 av_freep(&comp_brands_str);
668
669 return 0;
670 }
671
672 /* this atom should contain all header atoms */
673 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
674 {
675 int ret;
676
677 if ((ret = mov_read_default(c, pb, atom)) < 0)
678 return ret;
679 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
680 /* so we don't parse the whole file if over a network */
681 c->found_moov=1;
682 return 0; /* now go for mdat */
683 }
684
685 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
686 {
687 c->fragment.moof_offset = avio_tell(pb) - 8;
688 av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
689 return mov_read_default(c, pb, atom);
690 }
691
692 static void mov_metadata_creation_time(AVDictionary **metadata, time_t time)
693 {
694 char buffer[32];
695 if (time) {
696 struct tm *ptm;
697 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
698 ptm = gmtime(&time);
699 if (!ptm) return;
700 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
701 av_dict_set(metadata, "creation_time", buffer, 0);
702 }
703 }
704
705 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
706 {
707 AVStream *st;
708 MOVStreamContext *sc;
709 int version;
710 char language[4] = {0};
711 unsigned lang;
712 time_t creation_time;
713
714 if (c->fc->nb_streams < 1)
715 return 0;
716 st = c->fc->streams[c->fc->nb_streams-1];
717 sc = st->priv_data;
718
719 version = avio_r8(pb);
720 if (version > 1) {
721 av_log_ask_for_sample(c->fc, "unsupported version %d\n", version);
722 return AVERROR_PATCHWELCOME;
723 }
724 avio_rb24(pb); /* flags */
725 if (version == 1) {
726 creation_time = avio_rb64(pb);
727 avio_rb64(pb);
728 } else {
729 creation_time = avio_rb32(pb);
730 avio_rb32(pb); /* modification time */
731 }
732 mov_metadata_creation_time(&st->metadata, creation_time);
733
734 sc->time_scale = avio_rb32(pb);
735 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
736
737 lang = avio_rb16(pb); /* language */
738 if (ff_mov_lang_to_iso639(lang, language))
739 av_dict_set(&st->metadata, "language", language, 0);
740 avio_rb16(pb); /* quality */
741
742 return 0;
743 }
744
745 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
746 {
747 time_t creation_time;
748 int version = avio_r8(pb); /* version */
749 avio_rb24(pb); /* flags */
750
751 if (version == 1) {
752 creation_time = avio_rb64(pb);
753 avio_rb64(pb);
754 } else {
755 creation_time = avio_rb32(pb);
756 avio_rb32(pb); /* modification time */
757 }
758 mov_metadata_creation_time(&c->fc->metadata, creation_time);
759 c->time_scale = avio_rb32(pb); /* time scale */
760
761 av_dlog(c->fc, "time scale = %i\n", c->time_scale);
762
763 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
764 avio_rb32(pb); /* preferred scale */
765
766 avio_rb16(pb); /* preferred volume */
767
768 avio_skip(pb, 10); /* reserved */
769
770 avio_skip(pb, 36); /* display matrix */
771
772 avio_rb32(pb); /* preview time */
773 avio_rb32(pb); /* preview duration */
774 avio_rb32(pb); /* poster time */
775 avio_rb32(pb); /* selection time */
776 avio_rb32(pb); /* selection duration */
777 avio_rb32(pb); /* current time */
778 avio_rb32(pb); /* next track ID */
779
780 return 0;
781 }
782
783 static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
784 {
785 AVStream *st;
786
787 if (c->fc->nb_streams < 1)
788 return 0;
789 st = c->fc->streams[c->fc->nb_streams-1];
790
791 if ((uint64_t)atom.size > (1<<30))
792 return AVERROR_INVALIDDATA;
793
794 // currently SVQ3 decoder expect full STSD header - so let's fake it
795 // this should be fixed and just SMI header should be passed
796 av_free(st->codec->extradata);
797 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
798 if (!st->codec->extradata)
799 return AVERROR(ENOMEM);
800 st->codec->extradata_size = 0x5a + atom.size;
801 memcpy(st->codec->extradata, "SVQ3", 4); // fake
802 avio_read(pb, st->codec->extradata + 0x5a, atom.size);
803 av_dlog(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
804 return 0;
805 }
806
807 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
808 {
809 AVStream *st;
810 int little_endian;
811
812 if (c->fc->nb_streams < 1)
813 return 0;
814 st = c->fc->streams[c->fc->nb_streams-1];
815
816 little_endian = avio_rb16(pb);
817 av_dlog(c->fc, "enda %d\n", little_endian);
818 if (little_endian == 1) {
819 switch (st->codec->codec_id) {
820 case AV_CODEC_ID_PCM_S24BE:
821 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
822 break;
823 case AV_CODEC_ID_PCM_S32BE:
824 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
825 break;
826 case AV_CODEC_ID_PCM_F32BE:
827 st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
828 break;
829 case AV_CODEC_ID_PCM_F64BE:
830 st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
831 break;
832 default:
833 break;
834 }
835 }
836 return 0;
837 }
838
839 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
840 {
841 AVStream *st;
842 unsigned mov_field_order;
843 enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
844
845 if (c->fc->nb_streams < 1) // will happen with jp2 files
846 return 0;
847 st = c->fc->streams[c->fc->nb_streams-1];
848 if (atom.size < 2)
849 return AVERROR_INVALIDDATA;
850 mov_field_order = avio_rb16(pb);
851 if ((mov_field_order & 0xFF00) == 0x0100)
852 decoded_field_order = AV_FIELD_PROGRESSIVE;
853 else if ((mov_field_order & 0xFF00) == 0x0200) {
854 switch (mov_field_order & 0xFF) {
855 case 0x01: decoded_field_order = AV_FIELD_TT;
856 break;
857 case 0x06: decoded_field_order = AV_FIELD_BB;
858 break;
859 case 0x09: decoded_field_order = AV_FIELD_TB;
860 break;
861 case 0x0E: decoded_field_order = AV_FIELD_BT;
862 break;
863 }
864 }
865 if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
866 av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
867 }
868 st->codec->field_order = decoded_field_order;
869
870 return 0;
871 }
872
873 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
874 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
875 {
876 AVStream *st;
877 uint64_t size;
878 uint8_t *buf;
879
880 if (c->fc->nb_streams < 1) // will happen with jp2 files
881 return 0;
882 st= c->fc->streams[c->fc->nb_streams-1];
883 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
884 if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
885 return AVERROR_INVALIDDATA;
886 buf= av_realloc(st->codec->extradata, size);
887 if (!buf)
888 return AVERROR(ENOMEM);
889 st->codec->extradata= buf;
890 buf+= st->codec->extradata_size;
891 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
892 AV_WB32( buf , atom.size + 8);
893 AV_WL32( buf + 4, atom.type);
894 avio_read(pb, buf + 8, atom.size);
895 return 0;
896 }
897
898 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
899 {
900 AVStream *st;
901
902 if (c->fc->nb_streams < 1)
903 return 0;
904 st = c->fc->streams[c->fc->nb_streams-1];
905
906 if ((uint64_t)atom.size > (1<<30))
907 return AVERROR_INVALIDDATA;
908
909 if (st->codec->codec_id == AV_CODEC_ID_QDM2 || st->codec->codec_id == AV_CODEC_ID_QDMC) {
910 // pass all frma atom to codec, needed at least for QDMC and QDM2
911 av_free(st->codec->extradata);
912 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
913 if (!st->codec->extradata)
914 return AVERROR(ENOMEM);
915 st->codec->extradata_size = atom.size;
916 avio_read(pb, st->codec->extradata, atom.size);
917 } else if (atom.size > 8) { /* to read frma, esds atoms */
918 int ret;
919 if ((ret = mov_read_default(c, pb, atom)) < 0)
920 return ret;
921 } else
922 avio_skip(pb, atom.size);
923 return 0;
924 }
925
926 /**
927 * This function reads atom content and puts data in extradata without tag
928 * nor size unlike mov_read_extradata.
929 */
930 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
931 {
932 AVStream *st;
933
934 if (c->fc->nb_streams < 1)
935 return 0;
936 st = c->fc->streams[c->fc->nb_streams-1];
937
938 if ((uint64_t)atom.size > (1<<30))
939 return AVERROR_INVALIDDATA;
940
941 if (atom.size >= 10) {
942 // Broken files created by legacy versions of libavformat will
943 // wrap a whole fiel atom inside of a glbl atom.
944 unsigned size = avio_rb32(pb);
945 unsigned type = avio_rl32(pb);
946 avio_seek(pb, -8, SEEK_CUR);
947 if (type == MKTAG('f','i','e','l') && size == atom.size)
948 return mov_read_default(c, pb, atom);
949 }
950 av_free(st->codec->extradata);
951 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
952 if (!st->codec->extradata)
953 return AVERROR(ENOMEM);
954 st->codec->extradata_size = atom.size;
955 avio_read(pb, st->codec->extradata, atom.size);
956 return 0;
957 }
958
959 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
960 {
961 AVStream *st;
962 uint8_t profile_level;
963
964 if (c->fc->nb_streams < 1)
965 return 0;
966 st = c->fc->streams[c->fc->nb_streams-1];
967
968 if (atom.size >= (1<<28) || atom.size < 7)
969 return AVERROR_INVALIDDATA;
970
971 profile_level = avio_r8(pb);
972 if ((profile_level & 0xf0) != 0xc0)
973 return 0;
974
975 av_free(st->codec->extradata);
976 st->codec->extradata = av_mallocz(atom.size - 7 + FF_INPUT_BUFFER_PADDING_SIZE);
977 if (!st->codec->extradata)
978 return AVERROR(ENOMEM);
979 st->codec->extradata_size = atom.size - 7;
980 avio_seek(pb, 6, SEEK_CUR);
981 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
982 return 0;
983 }
984
985 /**
986 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
987 * but can have extradata appended at the end after the 40 bytes belonging
988 * to the struct.
989 */
990 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
991 {
992 AVStream *st;
993
994 if (c->fc->nb_streams < 1)
995 return 0;
996 if (atom.size <= 40)
997 return 0;
998 st = c->fc->streams[c->fc->nb_streams-1];
999
1000 if ((uint64_t)atom.size > (1<<30))
1001 return AVERROR_INVALIDDATA;
1002
1003 av_free(st->codec->extradata);
1004 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
1005 if (!st->codec->extradata)
1006 return AVERROR(ENOMEM);
1007 st->codec->extradata_size = atom.size - 40;
1008 avio_skip(pb, 40);
1009 avio_read(pb, st->codec->extradata, atom.size - 40);
1010 return 0;
1011 }
1012
1013 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1014 {
1015 AVStream *st;
1016 MOVStreamContext *sc;
1017 unsigned int i, entries;
1018
1019 if (c->fc->nb_streams < 1)
1020 return 0;
1021 st = c->fc->streams[c->fc->nb_streams-1];
1022 sc = st->priv_data;
1023
1024 avio_r8(pb); /* version */
1025 avio_rb24(pb); /* flags */
1026
1027 entries = avio_rb32(pb);
1028
1029 if (!entries)
1030 return 0;
1031 if (entries >= UINT_MAX/sizeof(int64_t))
1032 return AVERROR_INVALIDDATA;
1033
1034 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1035 if (!sc->chunk_offsets)
1036 return AVERROR(ENOMEM);
1037 sc->chunk_count = entries;
1038
1039 if (atom.type == MKTAG('s','t','c','o'))
1040 for (i = 0; i < entries && !pb->eof_reached; i++)
1041 sc->chunk_offsets[i] = avio_rb32(pb);
1042 else if (atom.type == MKTAG('c','o','6','4'))
1043 for (i = 0; i < entries && !pb->eof_reached; i++)
1044 sc->chunk_offsets[i] = avio_rb64(pb);
1045 else
1046 return AVERROR_INVALIDDATA;
1047
1048 sc->chunk_count = i;
1049
1050 if (pb->eof_reached)
1051 return AVERROR_EOF;
1052
1053 return 0;
1054 }
1055
1056 /**
1057 * Compute codec id for 'lpcm' tag.
1058 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1059 */
1060 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1061 {
1062 /* lpcm flags:
1063 * 0x1 = float
1064 * 0x2 = big-endian
1065 * 0x4 = signed
1066 */
1067 return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1068 }
1069
1070 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1071 {
1072 AVStream *st;
1073 MOVStreamContext *sc;
1074 int j, pseudo_stream_id;
1075
1076 if (c->fc->nb_streams < 1)
1077 return 0;
1078 st = c->fc->streams[c->fc->nb_streams-1];
1079 sc = st->priv_data;
1080
1081 for (pseudo_stream_id = 0;
1082 pseudo_stream_id < entries && !pb->eof_reached;
1083 pseudo_stream_id++) {
1084 //Parsing Sample description table
1085 enum AVCodecID id;
1086 int dref_id = 1;
1087 MOVAtom a = { AV_RL32("stsd") };
1088 int64_t start_pos = avio_tell(pb);
1089 uint32_t size = avio_rb32(pb); /* size */
1090 uint32_t format = avio_rl32(pb); /* data format */
1091
1092 if (size >= 16) {
1093 avio_rb32(pb); /* reserved */
1094 avio_rb16(pb); /* reserved */
1095 dref_id = avio_rb16(pb);
1096 } else {
1097 av_log(c->fc, AV_LOG_ERROR, "invalid size %d in stsd\n", size);
1098 return AVERROR_INVALIDDATA;
1099 }
1100
1101 if (st->codec->codec_tag &&
1102 st->codec->codec_tag != format &&
1103 (c->fc->video_codec_id ? ff_codec_get_id(ff_codec_movvideo_tags, format) != c->fc->video_codec_id
1104 : st->codec->codec_tag != MKTAG('j','p','e','g'))
1105 ){
1106 /* Multiple fourcc, we skip JPEG. This is not correct, we should
1107 * export it as a separate AVStream but this needs a few changes
1108 * in the MOV demuxer, patch welcome. */
1109 multiple_stsd:
1110 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1111 avio_skip(pb, size - (avio_tell(pb) - start_pos));
1112 continue;
1113 }
1114 /* we cannot demux concatenated h264 streams because of different extradata */
1115 if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
1116 goto multiple_stsd;
1117 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1118 sc->dref_id= dref_id;
1119
1120 st->codec->codec_tag = format;
1121 id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1122 if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
1123 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
1124
1125 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1126 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1127 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
1128 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
1129 id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1130 if (id <= 0)
1131 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1132 if (id > 0)
1133 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1134 else if (st->codec->codec_type == AVMEDIA_TYPE_DATA){
1135 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1136 if (id > 0)
1137 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1138 }
1139 }
1140
1141 av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
1142 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1143 (format >> 24) & 0xff, st->codec->codec_type);
1144
1145 if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1146 unsigned int color_depth, len;
1147 int color_greyscale;
1148 int color_table_id;
1149
1150 st->codec->codec_id = id;
1151 avio_rb16(pb); /* version */
1152 avio_rb16(pb); /* revision level */
1153 avio_rb32(pb); /* vendor */
1154 avio_rb32(pb); /* temporal quality */
1155 avio_rb32(pb); /* spatial quality */
1156
1157 st->codec->width = avio_rb16(pb); /* width */
1158 st->codec->height = avio_rb16(pb); /* height */
1159
1160 avio_rb32(pb); /* horiz resolution */
1161 avio_rb32(pb); /* vert resolution */
1162 avio_rb32(pb); /* data size, always 0 */
1163 avio_rb16(pb); /* frames per samples */
1164
1165 len = avio_r8(pb); /* codec name, pascal string */
1166 if (len > 31)
1167 len = 31;
1168 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1169 if (len < 31)
1170 avio_skip(pb, 31 - len);
1171 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1172 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1173 st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1174 /* Flash Media Server uses tag H263 with Sorenson Spark */
1175 if (format == MKTAG('H','2','6','3') &&
1176 !memcmp(st->codec->codec_name, "Sorenson H263", 13))
1177 st->codec->codec_id = AV_CODEC_ID_FLV1;
1178
1179 st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1180 color_table_id = avio_rb16(pb); /* colortable id */
1181 av_dlog(c->fc, "depth %d, ctab id %d\n",
1182 st->codec->bits_per_coded_sample, color_table_id);
1183 /* figure out the palette situation */
1184 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1185 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1186
1187 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1188 if ((color_depth == 2) || (color_depth == 4) ||
1189 (color_depth == 8)) {
1190 /* for palette traversal */
1191 unsigned int color_start, color_count, color_end;
1192 unsigned char r, g, b;
1193
1194 if (color_greyscale) {
1195 int color_index, color_dec;
1196 /* compute the greyscale palette */
1197 st->codec->bits_per_coded_sample = color_depth;
1198 color_count = 1 << color_depth;
1199 color_index = 255;
1200 color_dec = 256 / (color_count - 1);
1201 for (j = 0; j < color_count; j++) {
1202 r = g = b = color_index;
1203 sc->palette[j] =
1204 (r << 16) | (g << 8) | (b);
1205 color_index -= color_dec;
1206 if (color_index < 0)
1207 color_index = 0;
1208 }
1209 } else if (color_table_id) {
1210 const uint8_t *color_table;
1211 /* if flag bit 3 is set, use the default palette */
1212 color_count = 1 << color_depth;
1213 if (color_depth == 2)
1214 color_table = ff_qt_default_palette_4;
1215 else if (color_depth == 4)
1216 color_table = ff_qt_default_palette_16;
1217 else
1218 color_table = ff_qt_default_palette_256;
1219
1220 for (j = 0; j < color_count; j++) {
1221 r = color_table[j * 3 + 0];
1222 g = color_table[j * 3 + 1];
1223 b = color_table[j * 3 + 2];
1224 sc->palette[j] =
1225 (r << 16) | (g << 8) | (b);
1226 }
1227 } else {
1228 /* load the palette from the file */
1229 color_start = avio_rb32(pb);
1230 color_count = avio_rb16(pb);
1231 color_end = avio_rb16(pb);
1232 if ((color_start <= 255) &&
1233 (color_end <= 255)) {
1234 for (j = color_start; j <= color_end; j++) {
1235 /* each R, G, or B component is 16 bits;
1236 * only use the top 8 bits; skip alpha bytes
1237 * up front */
1238 avio_r8(pb);
1239 avio_r8(pb);
1240 r = avio_r8(pb);
1241 avio_r8(pb);
1242 g = avio_r8(pb);
1243 avio_r8(pb);
1244 b = avio_r8(pb);
1245 avio_r8(pb);
1246 sc->palette[j] =
1247 (r << 16) | (g << 8) | (b);
1248 }
1249 }
1250 }
1251 sc->has_palette = 1;
1252 }
1253 } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1254 int bits_per_sample, flags;
1255 uint16_t version = avio_rb16(pb);
1256
1257 st->codec->codec_id = id;
1258 avio_rb16(pb); /* revision level */
1259 avio_rb32(pb); /* vendor */
1260
1261 st->codec->channels = avio_rb16(pb); /* channel count */
1262 av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1263 st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1264
1265 sc->audio_cid = avio_rb16(pb);
1266 avio_rb16(pb); /* packet size = 0 */
1267
1268 st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1269
1270 //Read QT version 1 fields. In version 0 these do not exist.
1271 av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
1272 if (!c->isom) {
1273 if (version==1) {
1274 sc->samples_per_frame = avio_rb32(pb);
1275 avio_rb32(pb); /* bytes per packet */
1276 sc->bytes_per_frame = avio_rb32(pb);
1277 avio_rb32(pb); /* bytes per sample */
1278 } else if (version==2) {
1279 avio_rb32(pb); /* sizeof struct only */
1280 st->codec->sample_rate = av_int2double(avio_rb64(pb)); /* float 64 */
1281 st->codec->channels = avio_rb32(pb);
1282 avio_rb32(pb); /* always 0x7F000000 */
1283 st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
1284 flags = avio_rb32(pb); /* lpcm format specific flag */
1285 sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
1286 sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
1287 if (format == MKTAG('l','p','c','m'))
1288 st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1289 }
1290 }
1291
1292 switch (st->codec->codec_id) {
1293 case AV_CODEC_ID_PCM_S8:
1294 case AV_CODEC_ID_PCM_U8:
1295 if (st->codec->bits_per_coded_sample == 16)
1296 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1297 break;
1298 case AV_CODEC_ID_PCM_S16LE:
1299 case AV_CODEC_ID_PCM_S16BE:
1300 if (st->codec->bits_per_coded_sample == 8)
1301 st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1302 else if (st->codec->bits_per_coded_sample == 24)
1303 st->codec->codec_id =
1304 st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1305 AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1306 break;
1307 /* set values for old format before stsd version 1 appeared */
1308 case AV_CODEC_ID_MACE3:
1309 sc->samples_per_frame = 6;
1310 sc->bytes_per_frame = 2*st->codec->channels;
1311 break;
1312 case AV_CODEC_ID_MACE6:
1313 sc->samples_per_frame = 6;
1314 sc->bytes_per_frame = 1*st->codec->channels;
1315 break;
1316 case AV_CODEC_ID_ADPCM_IMA_QT:
1317 sc->samples_per_frame = 64;
1318 sc->bytes_per_frame = 34*st->codec->channels;
1319 break;
1320 case AV_CODEC_ID_GSM:
1321 sc->samples_per_frame = 160;
1322 sc->bytes_per_frame = 33;
1323 break;
1324 default:
1325 break;
1326 }
1327
1328 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1329 if (bits_per_sample) {
1330 st->codec->bits_per_coded_sample = bits_per_sample;
1331 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1332 }
1333 } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1334 // ttxt stsd contains display flags, justification, background
1335 // color, fonts, and default styles, so fake an atom to read it
1336 MOVAtom fake_atom = { .size = size - (avio_tell(pb) - start_pos) };
1337 if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1338 mov_read_glbl(c, pb, fake_atom);
1339 st->codec->codec_id= id;
1340 st->codec->width = sc->width;
1341 st->codec->height = sc->height;
1342 } else {
1343 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1344 avio_skip(pb, size - (avio_tell(pb) - start_pos));
1345 }
1346 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1347 a.size = size - (avio_tell(pb) - start_pos);
1348 if (a.size > 8) {
1349 int ret;
1350 if ((ret = mov_read_default(c, pb, a)) < 0)
1351 return ret;
1352 } else if (a.size > 0)
1353 avio_skip(pb, a.size);
1354 }
1355
1356 if (pb->eof_reached)
1357 return AVERROR_EOF;
1358
1359 if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1360 st->codec->sample_rate= sc->time_scale;
1361
1362 /* special codec parameters handling */
1363 switch (st->codec->codec_id) {
1364 #if CONFIG_DV_DEMUXER
1365 case AV_CODEC_ID_DVAUDIO:
1366 c->dv_fctx = avformat_alloc_context();
1367 c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1368 if (!c->dv_demux) {
1369 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1370 return AVERROR(ENOMEM);
1371 }
1372 sc->dv_audio_container = 1;
1373 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1374 break;
1375 #endif
1376 /* no ifdef since parameters are always those */
1377 case AV_CODEC_ID_QCELP:
1378 // force sample rate for qcelp when not stored in mov
1379 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1380 st->codec->sample_rate = 8000;
1381 st->codec->channels= 1; /* really needed */
1382 break;
1383 case AV_CODEC_ID_AMR_NB:
1384 st->codec->channels= 1; /* really needed */
1385 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1386 st->codec->sample_rate = 8000;
1387 break;
1388 case AV_CODEC_ID_AMR_WB:
1389 st->codec->channels = 1;
1390 st->codec->sample_rate = 16000;
1391 break;
1392 case AV_CODEC_ID_MP2:
1393 case AV_CODEC_ID_MP3:
1394 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1395 st->need_parsing = AVSTREAM_PARSE_FULL;
1396 break;
1397 case AV_CODEC_ID_GSM:
1398 case AV_CODEC_ID_ADPCM_MS:
1399 case AV_CODEC_ID_ADPCM_IMA_WAV:
1400 case AV_CODEC_ID_ILBC:
1401 st->codec->block_align = sc->bytes_per_frame;
1402 break;
1403 case AV_CODEC_ID_ALAC:
1404 if (st->codec->extradata_size == 36) {
1405 st->codec->channels = AV_RB8 (st->codec->extradata+21);
1406 st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
1407 }
1408 break;
1409 case AV_CODEC_ID_VC1:
1410 st->need_parsing = AVSTREAM_PARSE_FULL;
1411 break;
1412 default:
1413 break;
1414 }
1415
1416 return 0;
1417 }
1418
1419 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1420 {
1421 int entries;
1422
1423 avio_r8(pb); /* version */
1424 avio_rb24(pb); /* flags */
1425 entries = avio_rb32(pb);
1426
1427 return ff_mov_read_stsd_entries(c, pb, entries);
1428 }
1429
1430 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1431 {
1432 AVStream *st;
1433 MOVStreamContext *sc;
1434 unsigned int i, entries;
1435
1436 if (c->fc->nb_streams < 1)
1437 return 0;
1438 st = c->fc->streams[c->fc->nb_streams-1];
1439 sc = st->priv_data;
1440
1441 avio_r8(pb); /* version */
1442 avio_rb24(pb); /* flags */
1443
1444 entries = avio_rb32(pb);
1445
1446 av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1447
1448 if (!entries)
1449 return 0;
1450 if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1451 return AVERROR_INVALIDDATA;
1452 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1453 if (!sc->stsc_data)
1454 return AVERROR(ENOMEM);
1455
1456 for (i = 0; i < entries && !pb->eof_reached; i++) {
1457 sc->stsc_data[i].first = avio_rb32(pb);
1458 sc->stsc_data[i].count = avio_rb32(pb);
1459 sc->stsc_data[i].id = avio_rb32(pb);
1460 }
1461
1462 sc->stsc_count = i;
1463
1464 if (pb->eof_reached)
1465 return AVERROR_EOF;
1466
1467 return 0;
1468 }
1469
1470 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1471 {
1472 AVStream *st;
1473 MOVStreamContext *sc;
1474 unsigned i, entries;
1475
1476 if (c->fc->nb_streams < 1)
1477 return 0;
1478 st = c->fc->streams[c->fc->nb_streams-1];
1479 sc = st->priv_data;
1480
1481 avio_rb32(pb); // version + flags
1482
1483 entries = avio_rb32(pb);
1484 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1485 return AVERROR_INVALIDDATA;
1486 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1487 if (!sc->stps_data)
1488 return AVERROR(ENOMEM);
1489
1490 for (i = 0; i < entries && !pb->eof_reached; i++) {
1491 sc->stps_data[i] = avio_rb32(pb);
1492 //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1493 }
1494
1495 sc->stps_count = i;
1496
1497 if (pb->eof_reached)
1498 return AVERROR_EOF;
1499
1500 return 0;
1501 }
1502
1503 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1504 {
1505 AVStream *st;
1506 MOVStreamContext *sc;
1507 unsigned int i, entries;
1508
1509 if (c->fc->nb_streams < 1)
1510 return 0;
1511 st = c->fc->streams[c->fc->nb_streams-1];
1512 sc = st->priv_data;
1513
1514 avio_r8(pb); /* version */
1515 avio_rb24(pb); /* flags */
1516
1517 entries = avio_rb32(pb);
1518
1519 av_dlog(c->fc, "keyframe_count = %d\n", entries);
1520
1521 if (!entries)
1522 {
1523 sc->keyframe_absent = 1;
1524 return 0;
1525 }
1526 if (entries >= UINT_MAX / sizeof(int))
1527 return AVERROR_INVALIDDATA;
1528 sc->keyframes = av_malloc(entries * sizeof(int));
1529 if (!sc->keyframes)
1530 return AVERROR(ENOMEM);
1531
1532 for (i = 0; i < entries && !pb->eof_reached; i++) {
1533 sc->keyframes[i] = avio_rb32(pb);
1534 //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1535 }
1536
1537 sc->keyframe_count = i;
1538
1539 if (pb->eof_reached)
1540 return AVERROR_EOF;
1541
1542 return 0;
1543 }
1544
1545 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1546 {
1547 AVStream *st;
1548 MOVStreamContext *sc;
1549 unsigned int i, entries, sample_size, field_size, num_bytes;
1550 GetBitContext gb;
1551 unsigned char* buf;
1552
1553 if (c->fc->nb_streams < 1)
1554 return 0;
1555 st = c->fc->streams[c->fc->nb_streams-1];
1556 sc = st->priv_data;
1557
1558 avio_r8(pb); /* version */
1559 avio_rb24(pb); /* flags */
1560
1561 if (atom.type == MKTAG('s','t','s','z')) {
1562 sample_size = avio_rb32(pb);
1563 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1564 sc->sample_size = sample_size;
1565 field_size = 32;
1566 } else {
1567 sample_size = 0;
1568 avio_rb24(pb); /* reserved */
1569 field_size = avio_r8(pb);
1570 }
1571 entries = avio_rb32(pb);
1572
1573 av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1574
1575 sc->sample_count = entries;
1576 if (sample_size)
1577 return 0;
1578
1579 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1580 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1581 return AVERROR_INVALIDDATA;
1582 }
1583
1584 if (!entries)
1585 return 0;
1586 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1587 return AVERROR_INVALIDDATA;
1588 sc->sample_sizes = av_malloc(entries * sizeof(int));
1589 if (!sc->sample_sizes)
1590 return AVERROR(ENOMEM);
1591
1592 num_bytes = (entries*field_size+4)>>3;
1593
1594 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1595 if (!buf) {
1596 av_freep(&sc->sample_sizes);
1597 return AVERROR(ENOMEM);
1598 }
1599
1600 if (avio_read(pb, buf, num_bytes) < num_bytes) {
1601 av_freep(&sc->sample_sizes);
1602 av_free(buf);
1603 return AVERROR_INVALIDDATA;
1604 }
1605
1606 init_get_bits(&gb, buf, 8*num_bytes);
1607
1608 for (i = 0; i < entries && !pb->eof_reached; i++) {
1609 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1610 sc->data_size += sc->sample_sizes[i];
1611 }
1612
1613 sc->sample_count = i;
1614
1615 if (pb->eof_reached)
1616 return AVERROR_EOF;
1617
1618 av_free(buf);
1619 return 0;
1620 }
1621
1622 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1623 {
1624 AVStream *st;
1625 MOVStreamContext *sc;
1626 unsigned int i, entries;
1627 int64_t duration=0;
1628 int64_t total_sample_count=0;
1629
1630 if (c->fc->nb_streams < 1)
1631 return 0;
1632 st = c->fc->streams[c->fc->nb_streams-1];
1633 sc = st->priv_data;
1634
1635 avio_r8(pb); /* version */
1636 avio_rb24(pb); /* flags */
1637 entries = avio_rb32(pb);
1638
1639 av_dlog(c->fc, "track[%i].stts.entries = %i\n",
1640 c->fc->nb_streams-1, entries);
1641
1642 if (!entries)
1643 return 0;
1644 if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1645 return AVERROR(EINVAL);
1646
1647 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1648 if (!sc->stts_data)
1649 return AVERROR(ENOMEM);
1650
1651 for (i = 0; i < entries && !pb->eof_reached; i++) {
1652 int sample_duration;
1653 int sample_count;
1654
1655 sample_count=avio_rb32(pb);
1656 sample_duration = avio_rb32(pb);
1657 sc->stts_data[i].count= sample_count;
1658 sc->stts_data[i].duration= sample_duration;
1659
1660 av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
1661 sample_count, sample_duration);
1662
1663 duration+=(int64_t)sample_duration*sample_count;
1664 total_sample_count+=sample_count;
1665 }
1666
1667 sc->stts_count = i;
1668
1669 if (pb->eof_reached)
1670 return AVERROR_EOF;
1671
1672 st->nb_frames= total_sample_count;
1673 if (duration)
1674 st->duration= duration;
1675 sc->track_end = duration;
1676 return 0;
1677 }
1678
1679 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1680 {
1681 AVStream *st;
1682 MOVStreamContext *sc;
1683 unsigned int i, entries;
1684
1685 if (c->fc->nb_streams < 1)
1686 return 0;
1687 st = c->fc->streams[c->fc->nb_streams-1];
1688 sc = st->priv_data;
1689
1690 avio_r8(pb); /* version */
1691 avio_rb24(pb); /* flags */
1692 entries = avio_rb32(pb);
1693
1694 av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1695
1696 if (!entries)
1697 return 0;
1698 if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
1699 return AVERROR_INVALIDDATA;
1700 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1701 if (!sc->ctts_data)
1702 return AVERROR(ENOMEM);
1703
1704 for (i = 0; i < entries && !pb->eof_reached; i++) {
1705 int count =avio_rb32(pb);
1706 int duration =avio_rb32(pb);
1707
1708 sc->ctts_data[i].count = count;
1709 sc->ctts_data[i].duration= duration;
1710 if (duration < 0)
1711 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1712 }
1713
1714 sc->ctts_count = i;
1715
1716 if (pb->eof_reached)
1717 return AVERROR_EOF;
1718
1719 av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
1720
1721 return 0;
1722 }
1723
1724 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1725 {
1726 AVStream *st;
1727 MOVStreamContext *sc;
1728 unsigned int i, entries;
1729 uint8_t version;
1730 uint32_t grouping_type;
1731
1732 if (c->fc->nb_streams < 1)
1733 return 0;
1734 st = c->fc->streams[c->fc->nb_streams-1];
1735 sc = st->priv_data;
1736
1737 version = avio_r8(pb); /* version */
1738 avio_rb24(pb); /* flags */
1739 grouping_type = avio_rl32(pb);
1740 if (grouping_type != MKTAG( 'r','a','p',' '))
1741 return 0; /* only support 'rap ' grouping */
1742 if (version == 1)
1743 avio_rb32(pb); /* grouping_type_parameter */
1744
1745 entries = avio_rb32(pb);
1746 if (!entries)
1747 return 0;
1748 if (entries >= UINT_MAX / sizeof(*sc->rap_group))
1749 return AVERROR_INVALIDDATA;
1750 sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
1751 if (!sc->rap_group)
1752 return AVERROR(ENOMEM);
1753
1754 for (i = 0; i < entries && !pb->eof_reached; i++) {
1755 sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
1756 sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
1757 }
1758
1759 sc->rap_group_count = i;
1760
1761 return pb->eof_reached ? AVERROR_EOF : 0;
1762 }
1763
1764 static void mov_build_index(MOVContext *mov, AVStream *st)
1765 {
1766 MOVStreamContext *sc = st->priv_data;
1767 int64_t current_offset;
1768 int64_t current_dts = 0;
1769 unsigned int stts_index = 0;
1770 unsigned int stsc_index = 0;
1771 unsigned int stss_index = 0;
1772 unsigned int stps_index = 0;
1773 unsigned int i, j;
1774 uint64_t stream_size = 0;
1775 AVIndexEntry *mem;
1776
1777 /* adjust first dts according to edit list */
1778 if (sc->time_offset && mov->time_scale > 0) {
1779 if (sc->time_offset < 0)
1780 sc->time_offset = av_rescale(sc->time_offset, sc->time_scale, mov->time_scale);
1781 current_dts = -sc->time_offset;
1782 if (sc->ctts_data && sc->stts_data && sc->stts_data[0].duration &&
1783 sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1784 /* more than 16 frames delay, dts are likely wrong
1785 this happens with files created by iMovie */
1786 sc->wrong_dts = 1;
1787 st->codec->has_b_frames = 1;
1788 }
1789 }
1790
1791 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1792 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1793 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1794 unsigned int current_sample = 0;
1795 unsigned int stts_sample = 0;
1796 unsigned int sample_size;
1797 unsigned int distance = 0;
1798 unsigned int rap_group_index = 0;
1799 unsigned int rap_group_sample = 0;
1800 int rap_group_present = sc->rap_group_count && sc->rap_group;
1801 int key_off = (sc->keyframes && sc->keyframes[0] > 0) || (sc->stps_data && sc->stps_data[0] > 0);
1802
1803 current_dts -= sc->dts_shift;
1804
1805 if (!sc->sample_count)
1806 return;
1807 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
1808 return;
1809 mem = av_realloc(st->index_entries, (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries));
1810 if (!mem)
1811 return;
1812 st->index_entries = mem;
1813 st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
1814
1815 for (i = 0; i < sc->chunk_count; i++) {
1816 current_offset = sc->chunk_offsets[i];
1817 while (stsc_index + 1 < sc->stsc_count &&
1818 i + 1 == sc->stsc_data[stsc_index + 1].first)
1819 stsc_index++;
1820 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1821 int keyframe = 0;
1822 if (current_sample >= sc->sample_count) {
1823 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1824 return;
1825 }
1826
1827 if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
1828 keyframe = 1;
1829 if (stss_index + 1 < sc->keyframe_count)
1830 stss_index++;
1831 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1832 keyframe = 1;
1833 if (stps_index + 1 < sc->stps_count)
1834 stps_index++;
1835 }
1836 if (rap_group_present && rap_group_index < sc->rap_group_count) {
1837 if (sc->rap_group[rap_group_index].index > 0)
1838 keyframe = 1;
1839 if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
1840 rap_group_sample = 0;
1841 rap_group_index++;
1842 }
1843 }
1844 if (keyframe)
1845 distance = 0;
1846 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1847 if (sc->pseudo_stream_id == -1 ||
1848 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1849 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1850 e->pos = current_offset;
1851 e->timestamp = current_dts;
1852 e->size = sample_size;
1853 e->min_distance = distance;
1854 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1855 av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1856 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1857 current_offset, current_dts, sample_size, distance, keyframe);
1858 }
1859
1860 current_offset += sample_size;
1861 stream_size += sample_size;
1862 current_dts += sc->stts_data[stts_index].duration;
1863 distance++;
1864 stts_sample++;
1865 current_sample++;
1866 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1867 stts_sample = 0;
1868 stts_index++;
1869 }
1870 }
1871 }
1872 if (st->duration > 0)
1873 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1874 } else {
1875 unsigned chunk_samples, total = 0;
1876
1877 // compute total chunk count
1878 for (i = 0; i < sc->stsc_count; i++) {
1879 unsigned count, chunk_count;
1880
1881 chunk_samples = sc->stsc_data[i].count;
1882 if (i != sc->stsc_count - 1 &&
1883 sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1884 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1885 return;
1886 }
1887
1888 if (sc->samples_per_frame >= 160) { // gsm
1889 count = chunk_samples / sc->samples_per_frame;
1890 } else if (sc->samples_per_frame > 1) {
1891 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1892 count = (chunk_samples+samples-1) / samples;
1893 } else {
1894 count = (chunk_samples+1023) / 1024;
1895 }
1896
1897 if (i < sc->stsc_count - 1)
1898 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1899 else
1900 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1901 total += chunk_count * count;
1902 }
1903
1904 av_dlog(mov->fc, "chunk count %d\n", total);
1905 if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
1906 return;
1907 mem = av_realloc(st->index_entries, (st->nb_index_entries + total) * sizeof(*st->index_entries));
1908 if (!mem)
1909 return;
1910 st->index_entries = mem;
1911 st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
1912
1913 // populate index
1914 for (i = 0; i < sc->chunk_count; i++) {
1915 current_offset = sc->chunk_offsets[i];
1916 if (stsc_index + 1 < sc->stsc_count &&
1917 i + 1 == sc->stsc_data[stsc_index + 1].first)
1918 stsc_index++;
1919 chunk_samples = sc->stsc_data[stsc_index].count;
1920
1921 while (chunk_samples > 0) {
1922 AVIndexEntry *e;
1923 unsigned size, samples;
1924
1925 if (sc->samples_per_frame >= 160) { // gsm
1926 samples = sc->samples_per_frame;
1927 size = sc->bytes_per_frame;
1928 } else {
1929 if (sc->samples_per_frame > 1) {
1930 samples = FFMIN((1024 / sc->samples_per_frame)*
1931 sc->samples_per_frame, chunk_samples);
1932 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1933 } else {
1934 samples = FFMIN(1024, chunk_samples);
1935 size = samples * sc->sample_size;
1936 }
1937 }
1938
1939 if (st->nb_index_entries >= total) {
1940 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1941 return;
1942 }
1943 e = &st->index_entries[st->nb_index_entries++];
1944 e->pos = current_offset;
1945 e->timestamp = current_dts;
1946 e->size = size;
1947 e->min_distance = 0;
1948 e->flags = AVINDEX_KEYFRAME;
1949 av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1950 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1951 size, samples);
1952
1953 current_offset += size;
1954 current_dts += samples;
1955 chunk_samples -= samples;
1956 }
1957 }
1958 }
1959 }
1960
1961 static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref,
1962 AVIOInterruptCB *int_cb)
1963 {
1964 /* try relative path, we do not try the absolute because it can leak information about our
1965 system to an attacker */
1966 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1967 char filename[1024];
1968 char *src_path;
1969 int i, l;
1970
1971 /* find a source dir */
1972 src_path = strrchr(src, '/');
1973 if (src_path)
1974 src_path++;
1975 else
1976 src_path = src;
1977
1978 /* find a next level down to target */
1979 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1980 if (ref->path[l] == '/') {
1981 if (i == ref->nlvl_to - 1)
1982 break;
1983 else
1984 i++;
1985 }
1986
1987 /* compose filename if next level down to target was found */
1988 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
1989 memcpy(filename, src, src_path - src);
1990 filename[src_path - src] = 0;
1991
1992 for (i = 1; i < ref->nlvl_from; i++)
1993 av_strlcat(filename, "../", 1024);
1994
1995 av_strlcat(filename, ref->path + l + 1, 1024);
1996
1997 if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
1998 return 0;
1999 }
2000 }
2001
2002 return AVERROR(ENOENT);
2003 }
2004
2005 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2006 {
2007 AVStream *st;
2008 MOVStreamContext *sc;
2009 int ret;
2010
2011 st = avformat_new_stream(c->fc, NULL);
2012 if (!st) return AVERROR(ENOMEM);
2013 st->id = c->fc->nb_streams;
2014 sc = av_mallocz(sizeof(MOVStreamContext));
2015 if (!sc) return AVERROR(ENOMEM);
2016
2017 st->priv_data = sc;
2018 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2019 sc->ffindex = st->index;
2020
2021 if ((ret = mov_read_default(c, pb, atom)) < 0)
2022 return ret;
2023
2024 /* sanity checks */
2025 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2026 (!sc->sample_size && !sc->sample_count))) {
2027 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2028 st->index);
2029 return 0;
2030 }
2031
2032 if (sc->time_scale <= 0) {
2033 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
2034 sc->time_scale = c->time_scale;
2035 if (sc->time_scale <= 0)
2036 sc->time_scale = 1;
2037 }
2038
2039 avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2040
2041 mov_build_index(c, st);
2042
2043 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2044 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2045 if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback) < 0)
2046 av_log(c->fc, AV_LOG_ERROR,
2047 "stream %d, error opening alias: path='%s', dir='%s', "
2048 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2049 st->index, dref->path, dref->dir, dref->filename,
2050 dref->volume, dref->nlvl_from, dref->nlvl_to);
2051 } else
2052 sc->pb = c->fc->pb;
2053
2054 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2055 if (!st->sample_aspect_ratio.num &&
2056 (st->codec->width != sc->width || st->codec->height != sc->height)) {
2057 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2058 ((double)st->codec->width * sc->height), INT_MAX);
2059 }
2060
2061 if (st->duration != AV_NOPTS_VALUE)
2062 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2063 sc->time_scale*st->nb_frames, st->duration, INT_MAX);
2064
2065 #if FF_API_R_FRAME_RATE
2066 if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2067 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
2068 sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2069 #endif
2070 }
2071
2072 switch (st->codec->codec_id) {
2073 #if CONFIG_H261_DECODER
2074 case AV_CODEC_ID_H261:
2075 #endif
2076 #if CONFIG_H263_DECODER
2077 case AV_CODEC_ID_H263:
2078 #endif
2079 #if CONFIG_MPEG4_DECODER
2080 case AV_CODEC_ID_MPEG4:
2081 #endif
2082 st->codec->width = 0; /* let decoder init width/height */
2083 st->codec->height= 0;
2084 break;
2085 }
2086
2087 /* Do not need those anymore. */
2088 av_freep(&sc->chunk_offsets);
2089 av_freep(&sc->stsc_data);
2090 av_freep(&sc->sample_sizes);
2091 av_freep(&sc->keyframes);
2092 av_freep(&sc->stts_data);
2093 av_freep(&sc->stps_data);
2094 av_freep(&sc->rap_group);
2095
2096 return 0;
2097 }
2098
2099 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2100 {
2101 int ret;
2102 c->itunes_metadata = 1;
2103 ret = mov_read_default(c, pb, atom);
2104 c->itunes_metadata = 0;
2105 return ret;
2106 }
2107
2108 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2109 {
2110 while (atom.size > 8) {
2111 uint32_t tag = avio_rl32(pb);
2112 atom.size -= 4;
2113 if (tag == MKTAG('h','d','l','r')) {
2114 avio_seek(pb, -8, SEEK_CUR);
2115 atom.size += 8;
2116 return mov_read_default(c, pb, atom);
2117 }
2118 }
2119 return 0;
2120 }
2121
2122 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2123 {
2124 int i;
2125 int width;
2126 int height;
2127 int64_t disp_transform[2];
2128 int display_matrix[3][2];
2129 AVStream *st;
2130 MOVStreamContext *sc;
2131 int version;
2132
2133 if (c->fc->nb_streams < 1)
2134 return 0;
2135 st = c->fc->streams[c->fc->nb_streams-1];
2136 sc = st->priv_data;
2137
2138 version = avio_r8(pb);
2139 avio_rb24(pb); /* flags */
2140 /*
2141 MOV_TRACK_ENABLED 0x0001
2142 MOV_TRACK_IN_MOVIE 0x0002
2143 MOV_TRACK_IN_PREVIEW 0x0004
2144 MOV_TRACK_IN_POSTER 0x0008
2145 */
2146
2147 if (version == 1) {
2148 avio_rb64(pb);
2149 avio_rb64(pb);
2150 } else {
2151 avio_rb32(pb); /* creation time */
2152 avio_rb32(pb); /* modification time */
2153 }
2154 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2155 avio_rb32(pb); /* reserved */
2156
2157 /* highlevel (considering edits) duration in movie timebase */
2158 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2159 avio_rb32(pb); /* reserved */
2160 avio_rb32(pb); /* reserved */
2161
2162 avio_rb16(pb); /* layer */
2163 avio_rb16(pb); /* alternate group */
2164 avio_rb16(pb); /* volume */
2165 avio_rb16(pb); /* reserved */
2166
2167 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2168 // they're kept in fixed point format through all calculations
2169 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
2170 for (i = 0; i < 3; i++) {
2171 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2172 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2173 avio_rb32(pb); // 2.30 fixed point (not used)
2174 }
2175
2176 width = avio_rb32(pb); // 16.16 fixed point track width
2177 height = avio_rb32(pb); // 16.16 fixed point track height
2178 sc->width = width >> 16;
2179 sc->height = height >> 16;
2180
2181 // transform the display width/height according to the matrix
2182 // skip this if the display matrix is the default identity matrix
2183 // or if it is rotating the picture, ex iPhone 3GS
2184 // to keep the same scale, use [width height 1<<16]
2185 if (width && height &&
2186 ((display_matrix[0][0] != 65536 ||
2187 display_matrix[1][1] != 65536) &&
2188 !display_matrix[0][1] &&
2189 !display_matrix[1][0] &&
2190 !display_matrix[2][0] && !display_matrix[2][1])) {
2191 for (i = 0; i < 2; i++)
2192 disp_transform[i] =
2193 (int64_t) width * display_matrix[0][i] +
2194 (int64_t) height * display_matrix[1][i] +
2195 ((int64_t) display_matrix[2][i] << 16);
2196
2197 //sample aspect ratio is new width/height divided by old width/height
2198 st->sample_aspect_ratio = av_d2q(
2199 ((double) disp_transform[0] * height) /
2200 ((double) disp_transform[1] * width), INT_MAX);
2201 }
2202 return 0;
2203 }
2204
2205 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2206 {
2207 MOVFragment *frag = &c->fragment;
2208 MOVTrackExt *trex = NULL;
2209 int flags, track_id, i;
2210
2211 avio_r8(pb); /* version */
2212 flags = avio_rb24(pb);
2213
2214 track_id = avio_rb32(pb);
2215 if (!track_id)
2216 return AVERROR_INVALIDDATA;
2217 frag->track_id = track_id;
2218 for (i = 0; i < c->trex_count; i++)
2219 if (c->trex_data[i].track_id == frag->track_id) {
2220 trex = &c->trex_data[i];
2221 break;
2222 }
2223 if (!trex) {
2224 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2225 return AVERROR_INVALIDDATA;
2226 }
2227
2228 frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2229 avio_rb64(pb) : frag->moof_offset;
2230 frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2231
2232 frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2233 avio_rb32(pb) : trex->duration;
2234 frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2235 avio_rb32(pb) : trex->size;
2236 frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2237 avio_rb32(pb) : trex->flags;
2238 av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2239 return 0;
2240 }
2241
2242 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2243 {
2244 c->chapter_track = avio_rb32(pb);
2245 return 0;
2246 }
2247
2248 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2249 {
2250 MOVTrackExt *trex;
2251
2252 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2253 return AVERROR_INVALIDDATA;
2254 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
2255 if (!trex)
2256 return AVERROR(ENOMEM);
2257 c->trex_data = trex;
2258 trex = &c->trex_data[c->trex_count++];
2259 avio_r8(pb); /* version */
2260 avio_rb24(pb); /* flags */
2261 trex->track_id = avio_rb32(pb);
2262 trex->stsd_id = avio_rb32(pb);
2263 trex->duration = avio_rb32(pb);
2264 trex->size = avio_rb32(pb);
2265 trex->flags = avio_rb32(pb);
2266 return 0;
2267 }
2268
2269 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2270 {
2271 MOVFragment *frag = &c->fragment;
2272 AVStream *st = NULL;
2273 MOVStreamContext *sc;
2274 MOVStts *ctts_data;
2275 uint64_t offset;
2276 int64_t dts;
2277 int data_offset = 0;
2278 unsigned entries, first_sample_flags = frag->flags;
2279 int flags, distance, i, found_keyframe = 0;
2280
2281 for (i = 0; i < c->fc->nb_streams; i++) {
2282 if (c->fc->streams[i]->id == frag->track_id) {
2283 st = c->fc->streams[i];
2284 break;
2285 }
2286 }
2287 if (!st) {
2288 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2289 return AVERROR_INVALIDDATA;
2290 }
2291 sc = st->priv_data;
2292 if (sc->pseudo_stream_id+1 != frag->stsd_id)
2293 return 0;
2294 avio_r8(pb); /* version */
2295 flags = avio_rb24(pb);
2296 entries = avio_rb32(pb);
2297 av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2298
2299 /* Always assume the presence of composition time offsets.
2300 * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2301 * 1) in the initial movie, there are no samples.
2302 * 2) in the first movie fragment, there is only one sample without composition time offset.
2303 * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2304 if (!sc->ctts_count && sc->sample_count)
2305 {
2306 /* Complement ctts table if moov atom doesn't have ctts atom. */
2307 ctts_data = av_malloc(sizeof(*sc->ctts_data));
2308 if (!ctts_data)
2309 return AVERROR(ENOMEM);
2310 sc->ctts_data = ctts_data;
2311 sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2312 sc->ctts_data[sc->ctts_count].duration = 0;
2313 sc->ctts_count++;
2314 }
2315 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2316 return AVERROR_INVALIDDATA;
2317 ctts_data = av_realloc(sc->ctts_data,
2318 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2319 if (!ctts_data)
2320 return AVERROR(ENOMEM);
2321 sc->ctts_data = ctts_data;
2322
2323 if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2324 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2325 dts = sc->track_end - sc->time_offset;
2326 offset = frag->base_data_offset + data_offset;
2327 distance = 0;
2328 av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2329 for (i = 0; i < entries && !pb->eof_reached; i++) {
2330 unsigned sample_size = frag->size;
2331 int sample_flags = i ? frag->flags : first_sample_flags;
2332 unsigned sample_duration = frag->duration;
2333 int keyframe = 0;
2334
2335 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2336 if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2337 if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2338 sc->ctts_data[sc->ctts_count].count = 1;
2339 sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2340 avio_rb32(pb) : 0;
2341 sc->ctts_count++;
2342 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2343 keyframe = 1;
2344 else if (!found_keyframe)
2345 keyframe = found_keyframe =
2346 !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2347 MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2348 if (keyframe)
2349 distance = 0;
2350 av_add_index_entry(st, offset, dts, sample_size, distance,
2351 keyframe ? AVINDEX_KEYFRAME : 0);
2352 av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2353 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2354 offset, dts, sample_size, distance, keyframe);
2355 distance++;
2356 dts += sample_duration;
2357 offset += sample_size;
2358 sc->data_size += sample_size;
2359 }
2360
2361 if (pb->eof_reached)
2362 return AVERROR_EOF;
2363
2364 frag->moof_offset = offset;
2365 st->duration = sc->track_end = dts + sc->time_offset;
2366 return 0;
2367 }
2368
2369 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2370 /* like the files created with Adobe Premiere 5.0, for samples see */
2371 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2372 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2373 {
2374 int err;
2375
2376 if (atom.size < 8)
2377 return 0; /* continue */
2378 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2379 avio_skip(pb, atom.size - 4);
2380 return 0;
2381 }
2382 atom.type = avio_rl32(pb);
2383 atom.size -= 8;
2384 if (atom.type != MKTAG('m','d','a','t')) {
2385 avio_skip(pb, atom.size);
2386 return 0;
2387 }
2388 err = mov_read_mdat(c, pb, atom);
2389 return err;
2390 }
2391
2392 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2393 {
2394 #if CONFIG_ZLIB
2395 AVIOContext ctx;
2396 uint8_t *cmov_data;
2397 uint8_t *moov_data; /* uncompressed data */
2398 long cmov_len, moov_len;
2399 int ret = -1;
2400
2401 avio_rb32(pb); /* dcom atom */
2402 if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2403 return AVERROR_INVALIDDATA;
2404 if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2405 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2406 return AVERROR_INVALIDDATA;
2407 }
2408 avio_rb32(pb); /* cmvd atom */
2409 if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2410 return AVERROR_INVALIDDATA;
2411 moov_len = avio_rb32(pb); /* uncompressed size */
2412 cmov_len = atom.size - 6 * 4;
2413
2414 cmov_data = av_malloc(cmov_len);
2415 if (!cmov_data)
2416 return AVERROR(ENOMEM);
2417 moov_data = av_malloc(moov_len);
2418 if (!moov_data) {
2419 av_free(cmov_data);
2420 return AVERROR(ENOMEM);
2421 }
2422 avio_read(pb, cmov_data, cmov_len);
2423 if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2424 goto free_and_return;
2425 if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2426 goto free_and_return;
2427 atom.type = MKTAG('m','o','o','v');
2428 atom.size = moov_len;
2429 ret = mov_read_default(c, &ctx, atom);
2430 free_and_return:
2431 av_free(moov_data);
2432 av_free(cmov_data);
2433 return ret;
2434 #else
2435 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2436 return AVERROR(ENOSYS);
2437 #endif
2438 }
2439
2440 /* edit list atom */
2441 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2442 {
2443 MOVStreamContext *sc;
2444 int i, edit_count, version;
2445
2446 if (c->fc->nb_streams < 1)
2447 return 0;
2448 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2449
2450 version = avio_r8(pb); /* version */
2451 avio_rb24(pb); /* flags */
2452 edit_count = avio_rb32(pb); /* entries */
2453
2454 if ((uint64_t)edit_count*12+8 > atom.size)
2455 return AVERROR_INVALIDDATA;
2456
2457 for (i=0; i<edit_count; i++){
2458 int64_t time;
2459 int64_t duration;
2460 if (version == 1) {
2461 duration = avio_rb64(pb);
2462 time = avio_rb64(pb);
2463 } else {
2464 duration = avio_rb32(pb); /* segment duration */
2465 time = (int32_t)avio_rb32(pb); /* media time */
2466 }
2467 avio_rb32(pb); /* Media rate */
2468 if (i == 0 && time >= -1) {
2469 sc->time_offset = time != -1 ? time : -duration;
2470 }
2471 }
2472
2473 if (edit_count > 1)
2474 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2475 "a/v desync might occur, patch welcome\n");
2476
2477 av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2478 return 0;
2479 }
2480
2481 static const MOVParseTableEntry mov_default_parse_table[] = {
2482 { MKTAG('a','v','s','s'), mov_read_extradata },
2483 { MKTAG('c','h','p','l'), mov_read_chpl },
2484 { MKTAG('c','o','6','4'), mov_read_stco },
2485 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2486 { MKTAG('d','i','n','f'), mov_read_default },
2487 { MKTAG('d','r','e','f'), mov_read_dref },
2488 { MKTAG('e','d','t','s'), mov_read_default },
2489 { MKTAG('e','l','s','t'), mov_read_elst },
2490 { MKTAG('e','n','d','a'), mov_read_enda },
2491 { MKTAG('f','i','e','l'), mov_read_fiel },
2492 { MKTAG('f','t','y','p'), mov_read_ftyp },
2493 { MKTAG('g','l','b','l'), mov_read_glbl },
2494 { MKTAG('h','d','l','r'), mov_read_hdlr },
2495 { MKTAG('i','l','s','t'), mov_read_ilst },
2496 { MKTAG('j','p','2','h'), mov_read_extradata },
2497 { MKTAG('m','d','a','t'), mov_read_mdat },
2498 { MKTAG('m','d','h','d'), mov_read_mdhd },
2499 { MKTAG('m','d','i','a'), mov_read_default },
2500 { MKTAG('m','e','t','a'), mov_read_meta },
2501 { MKTAG('m','i','n','f'), mov_read_default },
2502 { MKTAG('m','o','o','f'), mov_read_moof },
2503 { MKTAG('m','o','o','v'), mov_read_moov },
2504 { MKTAG('m','v','e','x'), mov_read_default },
2505 { MKTAG('m','v','h','d'), mov_read_mvhd },
2506 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2507 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2508 { MKTAG('a','v','c','C'), mov_read_glbl },
2509 { MKTAG('p','a','s','p'), mov_read_pasp },
2510 { MKTAG('s','t','b','l'), mov_read_default },
2511 { MKTAG('s','t','c','o'), mov_read_stco },
2512 { MKTAG('s','t','p','s'), mov_read_stps },
2513 { MKTAG('s','t','r','f'), mov_read_strf },
2514 { MKTAG('s','t','s','c'), mov_read_stsc },
2515 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2516 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2517 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2518 { MKTAG('s','t','t','s'), mov_read_stts },
2519 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2520 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2521 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2522 { MKTAG('t','r','a','k'), mov_read_trak },
2523 { MKTAG('t','r','a','f'), mov_read_default },
2524 { MKTAG('t','r','e','f'), mov_read_default },
2525 { MKTAG('c','h','a','p'), mov_read_chap },
2526 { MKTAG('t','r','e','x'), mov_read_trex },
2527 { MKTAG('t','r','u','n'), mov_read_trun },
2528 { MKTAG('u','d','t','a'), mov_read_default },
2529 { MKTAG('w','a','v','e'), mov_read_wave },
2530 { MKTAG('e','s','d','s'), mov_read_esds },
2531 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2532 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
2533 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2534 { MKTAG('w','f','e','x'), mov_read_wfex },
2535 { MKTAG('c','m','o','v'), mov_read_cmov },
2536 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
2537 { MKTAG('d','v','c','1'), mov_read_dvc1 },
2538 { MKTAG('s','b','g','p'), mov_read_sbgp },
2539 { 0, NULL }
2540 };
2541
2542 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2543 {
2544 int64_t total_size = 0;
2545 MOVAtom a;
2546 int i;
2547
2548 if (atom.size < 0)
2549 atom.size = INT64_MAX;
2550 while (total_size + 8 < atom.size && !pb->eof_reached) {
2551 int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
2552 a.size = atom.size;
2553 a.type=0;
2554 if (atom.size >= 8) {
2555 a.size = avio_rb32(pb);
2556 a.type = avio_rl32(pb);
2557 }
2558 av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
2559 a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
2560 total_size += 8;
2561 if (a.size == 1) { /* 64 bit extended size */
2562 a.size = avio_rb64(pb) - 8;
2563 total_size += 8;
2564 }
2565 if (a.size == 0) {
2566 a.size = atom.size - total_size;
2567 if (a.size <= 8)
2568 break;
2569 }
2570 a.size -= 8;
2571 if (a.size < 0)
2572 break;
2573 a.size = FFMIN(a.size, atom.size - total_size);
2574
2575 for (i = 0; mov_default_parse_table[i].type; i++)
2576 if (mov_default_parse_table[i].type == a.type) {
2577 parse = mov_default_parse_table[i].parse;
2578 break;
2579 }
2580
2581 // container is user data
2582 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
2583 atom.type == MKTAG('i','l','s','t')))
2584 parse = mov_read_udta_string;
2585
2586 if (!parse) { /* skip leaf atoms data */
2587 avio_skip(pb, a.size);
2588 } else {
2589 int64_t start_pos = avio_tell(pb);
2590 int64_t left;
2591 int err = parse(c, pb, a);
2592 if (err < 0)
2593 return err;
2594 if (c->found_moov && c->found_mdat &&
2595 ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
2596 start_pos + a.size == avio_size(pb))) {
2597 if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
2598 c->next_root_atom = start_pos + a.size;
2599 return 0;
2600 }
2601 left = a.size - avio_tell(pb) + start_pos;
2602 if (left > 0) /* skip garbage at atom end */
2603 avio_skip(pb, left);
2604 }
2605
2606 total_size += a.size;
2607 }
2608
2609 if (total_size < atom.size && atom.size < 0x7ffff)
2610 avio_skip(pb, atom.size - total_size);
2611
2612 return 0;
2613 }
2614
2615 static int mov_probe(AVProbeData *p)
2616 {
2617 unsigned int offset;
2618 uint32_t tag;
2619 int score = 0;
2620
2621 /* check file header */
2622 offset = 0;
2623 for (;;) {
2624 /* ignore invalid offset */
2625 if ((offset + 8) > (unsigned int)p->buf_size)
2626 return score;
2627 tag = AV_RL32(p->buf + offset + 4);
2628 switch(tag) {
2629 /* check for obvious tags */
2630 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2631 case MKTAG('m','o','o','v'):
2632 case MKTAG('m','d','a','t'):
2633 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2634 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2635 case MKTAG('f','t','y','p'):
2636 return AVPROBE_SCORE_MAX;
2637 /* those are more common words, so rate then a bit less */
2638 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2639 case MKTAG('w','i','d','e'):
2640 case MKTAG('f','r','e','e'):
2641 case MKTAG('j','u','n','k'):
2642 case MKTAG('p','i','c','t'):
2643 return AVPROBE_SCORE_MAX - 5;
2644 case MKTAG(0x82,0x82,0x7f,0x7d):
2645 case MKTAG('s','k','i','p'):
2646 case MKTAG('u','u','i','d'):
2647 case MKTAG('p','r','f','l'):
2648 offset = AV_RB32(p->buf+offset) + offset;
2649 /* if we only find those cause probedata is too small at least rate them */
2650 score = AVPROBE_SCORE_MAX - 50;
2651 break;
2652 default:
2653 /* unrecognized tag */
2654 return score;
2655 }
2656 }
2657 }
2658
2659 // must be done after parsing all trak because there's no order requirement
2660 static void mov_read_chapters(AVFormatContext *s)
2661 {
2662 MOVContext *mov = s->priv_data;
2663 AVStream *st = NULL;
2664 MOVStreamContext *sc;
2665 int64_t cur_pos;
2666 int i;
2667
2668 for (i = 0; i < s->nb_streams; i++)
2669 if (s->streams[i]->id == mov->chapter_track) {
2670 st = s->streams[i];
2671 break;
2672 }
2673 if (!st) {
2674 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2675 return;
2676 }
2677
2678 st->discard = AVDISCARD_ALL;
2679 sc = st->priv_data;
2680 cur_pos = avio_tell(sc->pb);
2681
2682 for (i = 0; i < st->nb_index_entries; i++) {
2683 AVIndexEntry *sample = &st->index_entries[i];
2684 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2685 uint8_t *title;
2686 uint16_t ch;
2687 int len, title_len;
2688
2689 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2690 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2691 goto finish;
2692 }
2693
2694 // the first two bytes are the length of the title
2695 len = avio_rb16(sc->pb);
2696 if (len > sample->size-2)
2697 continue;
2698 title_len = 2*len + 1;
2699 if (!(title = av_mallocz(title_len)))
2700 goto finish;
2701
2702 // The samples could theoretically be in any encoding if there's an encd
2703 // atom following, but in practice are only utf-8 or utf-16, distinguished
2704 // instead by the presence of a BOM
2705 if (!len) {
2706 title[0] = 0;
2707 } else {
2708 ch = avio_rb16(sc->pb);
2709 if (ch == 0xfeff)
2710 avio_get_str16be(sc->pb, len, title, title_len);
2711 else if (ch == 0xfffe)
2712 avio_get_str16le(sc->pb, len, title, title_len);
2713 else {
2714 AV_WB16(title, ch);
2715 if (len == 1 || len == 2)
2716 title[len] = 0;
2717 else
2718 avio_get_str(sc->pb, len - 2, title + 2, title_len - 2);
2719 }
2720 }
2721
2722 avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
2723 av_freep(&title);
2724 }
2725 finish:
2726 avio_seek(sc->pb, cur_pos, SEEK_SET);
2727 }
2728
2729 static int mov_read_close(AVFormatContext *s)
2730 {
2731 MOVContext *mov = s->priv_data;
2732 int i, j;
2733
2734 for (i = 0; i < s->nb_streams; i++) {
2735 AVStream *st = s->streams[i];
2736 MOVStreamContext *sc = st->priv_data;
2737
2738 av_freep(&sc->ctts_data);
2739 for (j = 0; j < sc->drefs_count; j++) {
2740 av_freep(&sc->drefs[j].path);
2741 av_freep(&sc->drefs[j].dir);
2742 }
2743 av_freep(&sc->drefs);
2744 if (sc->pb && sc->pb != s->pb)
2745 avio_close(sc->pb);
2746 }
2747
2748 if (mov->dv_demux) {
2749 for (i = 0; i < mov->dv_fctx->nb_streams; i++) {
2750 av_freep(&mov->dv_fctx->streams[i]->codec);
2751 av_freep(&mov->dv_fctx->streams[i]);
2752 }
2753 av_freep(&mov->dv_fctx);
2754 av_freep(&mov->dv_demux);
2755 }
2756
2757 av_freep(&mov->trex_data);
2758
2759 return 0;
2760 }
2761
2762 static int mov_read_header(AVFormatContext *s)
2763 {
2764 MOVContext *mov = s->priv_data;
2765 AVIOContext *pb = s->pb;
2766 int err;
2767 MOVAtom atom = { AV_RL32("root") };
2768
2769 mov->fc = s;
2770 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2771 if (pb->seekable)
2772 atom.size = avio_size(pb);
2773 else
2774 atom.size = INT64_MAX;
2775
2776 /* check MOV header */
2777 if ((err = mov_read_default(mov, pb, atom)) < 0) {
2778 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2779 mov_read_close(s);
2780 return err;
2781 }
2782 if (!mov->found_moov) {
2783 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2784 mov_read_close(s);
2785 return AVERROR_INVALIDDATA;
2786 }
2787 av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
2788
2789 if (pb->seekable && mov->chapter_track > 0)
2790 mov_read_chapters(s);
2791
2792 if (mov->trex_data) {
2793 int i;
2794 for (i = 0; i < s->nb_streams; i++) {
2795 AVStream *st = s->streams[i];
2796 MOVStreamContext *sc = st->priv_data;
2797 if (st->duration)
2798 st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
2799 }
2800 }
2801
2802 return 0;
2803 }
2804
2805 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2806 {
2807 AVIndexEntry *sample = NULL;
2808 int64_t best_dts = INT64_MAX;
2809 int i;
2810 for (i = 0; i < s->nb_streams; i++) {
2811 AVStream *avst = s->streams[i];
2812 MOVStreamContext *msc = avst->priv_data;
2813 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2814 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2815 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2816 av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2817 if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
2818 (s->pb->seekable &&
2819 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2820 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2821 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2822 sample = current_sample;
2823 best_dts = dts;
2824 *st = avst;
2825 }
2826 }
2827 }
2828 return sample;
2829 }
2830
2831 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2832 {
2833 MOVContext *mov = s->priv_data;
2834 MOVStreamContext *sc;
2835 AVIndexEntry *sample;
2836 AVStream *st = NULL;
2837 int ret;
2838 retry:
2839 sample = mov_find_next_sample(s, &st);
2840 if (!sample) {
2841 mov->found_mdat = 0;
2842 if (!mov->next_root_atom)
2843 return AVERROR_EOF;
2844 avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
2845 mov->next_root_atom = 0;
2846 if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2847 s->pb->eof_reached)
2848 return AVERROR_EOF;
2849 av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
2850 goto retry;
2851 }
2852 sc = st->priv_data;
2853 /* must be done just before reading, to avoid infinite loop on sample */
2854 sc->current_sample++;
2855
2856 if (st->discard != AVDISCARD_ALL) {
2857 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2858 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2859 sc->ffindex, sample->pos);
2860 return AVERROR_INVALIDDATA;
2861 }
2862 ret = av_get_packet(sc->pb, pkt, sample->size);
2863 if (ret < 0)
2864 return ret;
2865 if (sc->has_palette) {
2866 uint8_t *pal;
2867
2868 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2869 if (!pal) {
2870 av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
2871 } else {
2872 memcpy(pal, sc->palette, AVPALETTE_SIZE);
2873 sc->has_palette = 0;
2874 }
2875 }
2876 #if CONFIG_DV_DEMUXER
2877 if (mov->dv_demux && sc->dv_audio_container) {
2878 avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2879 av_free(pkt->data);
2880 pkt->size = 0;
2881 ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
2882 if (ret < 0)
2883 return ret;
2884 }
2885 #endif
2886 }
2887
2888 pkt->stream_index = sc->ffindex;
2889 pkt->dts = sample->timestamp;
2890 if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
2891 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2892 /* update ctts context */
2893 sc->ctts_sample++;
2894 if (sc->ctts_index < sc->ctts_count &&
2895 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2896 sc->ctts_index++;
2897 sc->ctts_sample = 0;
2898 }
2899 if (sc->wrong_dts)
2900 pkt->dts = AV_NOPTS_VALUE;
2901 } else {
2902 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2903 st->index_entries[sc->current_sample].timestamp : st->duration;
2904 pkt->duration = next_dts - pkt->dts;
2905 pkt->pts = pkt->dts;
2906 }
2907 if (st->discard == AVDISCARD_ALL)
2908 goto retry;
2909 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2910 pkt->pos = sample->pos;
2911 av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2912 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2913 return 0;
2914 }
2915
2916 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2917 {
2918 MOVStreamContext *sc = st->priv_data;
2919 int sample, time_sample;
2920 int i;
2921
2922 sample = av_index_search_timestamp(st, timestamp, flags);
2923 av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2924 if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2925 sample = 0;
2926 if (sample < 0) /* not sure what to do */
2927 return AVERROR_INVALIDDATA;
2928 sc->current_sample = sample;
2929 av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2930 /* adjust ctts index */
2931 if (sc->ctts_data) {
2932 time_sample = 0;
2933 for (i = 0; i < sc->ctts_count; i++) {
2934 int next = time_sample + sc->ctts_data[i].count;
2935 if (next > sc->current_sample) {
2936 sc->ctts_index = i;
2937 sc->ctts_sample = sc->current_sample - time_sample;
2938 break;
2939 }
2940 time_sample = next;
2941 }
2942 }
2943 return sample;
2944 }
2945
2946 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2947 {
2948 AVStream *st;
2949 int64_t seek_timestamp, timestamp;
2950 int sample;
2951 int i;
2952
2953 if (stream_index >= s->nb_streams)
2954 return AVERROR_INVALIDDATA;
2955 if (sample_time < 0)
2956 sample_time = 0;
2957
2958 st = s->streams[stream_index];
2959 sample = mov_seek_stream(s, st, sample_time, flags);
2960 if (sample < 0)
2961 return sample;
2962
2963 /* adjust seek timestamp to found sample timestamp */
2964 seek_timestamp = st->index_entries[sample].timestamp;
2965
2966 for (i = 0; i < s->nb_streams; i++) {
2967 st = s->streams[i];
2968 if (stream_index == i)
2969 continue;
2970
2971 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2972 mov_seek_stream(s, st, timestamp, flags);
2973 }
2974 return 0;
2975 }
2976
2977 AVInputFormat ff_mov_demuxer = {
2978 .name = "mov,mp4,m4a,3gp,3g2,mj2",
2979 .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
2980 .priv_data_size = sizeof(MOVContext),
2981 .read_probe = mov_probe,
2982 .read_header = mov_read_header,
2983 .read_packet = mov_read_packet,
2984 .read_close = mov_read_close,
2985 .read_seek = mov_read_seek,
2986 };
A couple of patches to make building with MPlayer easier