More correct printf format specifiers
[libav.git] / libavformat / mov.c
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 * first version by Francois Revol <revol@free.fr>
7 * seek function by Gael Chardon <gael.dev@4now.net>
8 *
9 * This file is part of Libav.
10 *
11 * Libav is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * Libav is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with Libav; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26 #include <inttypes.h>
27 #include <limits.h>
28 #include <stdint.h>
29
30 //#define MOV_EXPORT_ALL_METADATA
31
32 #include "libavutil/attributes.h"
33 #include "libavutil/channel_layout.h"
34 #include "libavutil/intreadwrite.h"
35 #include "libavutil/intfloat.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/dict.h"
39 #include "libavcodec/ac3tab.h"
40 #include "avformat.h"
41 #include "internal.h"
42 #include "avio_internal.h"
43 #include "riff.h"
44 #include "isom.h"
45 #include "libavcodec/get_bits.h"
46 #include "id3v1.h"
47 #include "mov_chan.h"
48
49 #if CONFIG_ZLIB
50 #include <zlib.h>
51 #endif
52
53 #include "qtpalette.h"
54
55
56 #undef NDEBUG
57 #include <assert.h>
58
59 /* those functions parse an atom */
60 /* links atom IDs to parse functions */
61 typedef struct MOVParseTableEntry {
62 uint32_t type;
63 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
64 } MOVParseTableEntry;
65
66 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
67
68 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
69 unsigned len, const char *key)
70 {
71 char buf[16];
72
73 short current, total = 0;
74 avio_rb16(pb); // unknown
75 current = avio_rb16(pb);
76 if (len >= 6)
77 total = avio_rb16(pb);
78 if (!total)
79 snprintf(buf, sizeof(buf), "%d", current);
80 else
81 snprintf(buf, sizeof(buf), "%d/%d", current, total);
82 av_dict_set(&c->fc->metadata, key, buf, 0);
83
84 return 0;
85 }
86
87 static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
88 unsigned len, const char *key)
89 {
90 char buf[16];
91
92 /* bypass padding bytes */
93 avio_r8(pb);
94 avio_r8(pb);
95 avio_r8(pb);
96
97 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
98 av_dict_set(&c->fc->metadata, key, buf, 0);
99
100 return 0;
101 }
102
103 static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
104 unsigned len, const char *key)
105 {
106 char buf[16];
107
108 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
109 av_dict_set(&c->fc->metadata, key, buf, 0);
110
111 return 0;
112 }
113
114 static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
115 unsigned len, const char *key)
116 {
117 short genre;
118 char buf[20];
119
120 avio_r8(pb); // unknown
121
122 genre = avio_r8(pb);
123 if (genre < 1 || genre > ID3v1_GENRE_MAX)
124 return 0;
125 snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
126 av_dict_set(&c->fc->metadata, key, buf, 0);
127
128 return 0;
129 }
130
131 static const uint32_t mac_to_unicode[128] = {
132 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
133 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
134 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
135 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
136 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
137 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
138 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
139 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
140 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
141 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
142 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
143 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
144 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
145 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
146 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
147 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
148 };
149
150 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
151 char *dst, int dstlen)
152 {
153 char *p = dst;
154 char *end = dst+dstlen-1;
155 int i;
156
157 for (i = 0; i < len; i++) {
158 uint8_t t, c = avio_r8(pb);
159 if (c < 0x80 && p < end)
160 *p++ = c;
161 else
162 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
163 }
164 *p = 0;
165 return p - dst;
166 }
167
168 static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
169 {
170 AVPacket pkt;
171 AVStream *st;
172 MOVStreamContext *sc;
173 enum AVCodecID id;
174 int ret;
175
176 switch (type) {
177 case 0xd: id = AV_CODEC_ID_MJPEG; break;
178 case 0xe: id = AV_CODEC_ID_PNG; break;
179 case 0x1b: id = AV_CODEC_ID_BMP; break;
180 default:
181 av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
182 avio_skip(pb, len);
183 return 0;
184 }
185
186 st = avformat_new_stream(c->fc, NULL);
187 if (!st)
188 return AVERROR(ENOMEM);
189 sc = av_mallocz(sizeof(*sc));
190 if (!sc)
191 return AVERROR(ENOMEM);
192 st->priv_data = sc;
193
194 ret = av_get_packet(pb, &pkt, len);
195 if (ret < 0)
196 return ret;
197
198 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
199
200 st->attached_pic = pkt;
201 st->attached_pic.stream_index = st->index;
202 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
203
204 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
205 st->codec->codec_id = id;
206
207 return 0;
208 }
209
210 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
211 {
212 #ifdef MOV_EXPORT_ALL_METADATA
213 char tmp_key[5];
214 #endif
215 char str[1024], key2[16], language[4] = {0};
216 const char *key = NULL;
217 uint16_t langcode = 0;
218 uint32_t data_type = 0, str_size;
219 int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
220
221 switch (atom.type) {
222 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
223 case MKTAG(0xa9,'a','u','t'):
224 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
225 case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
226 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
227 case MKTAG( 'c','p','r','t'):
228 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
229 case MKTAG(0xa9,'c','m','t'):
230 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
231 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
232 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
233 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
234 case MKTAG( 'g','n','r','e'): key = "genre";
235 parse = mov_metadata_gnre; break;
236 case MKTAG(0xa9,'t','o','o'):
237 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
238 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
239 case MKTAG( 'd','e','s','c'): key = "description";break;
240 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
241 case MKTAG( 't','v','s','h'): key = "show"; break;
242 case MKTAG( 't','v','e','n'): key = "episode_id";break;
243 case MKTAG( 't','v','n','n'): key = "network"; break;
244 case MKTAG( 't','r','k','n'): key = "track";
245 parse = mov_metadata_track_or_disc_number; break;
246 case MKTAG( 'd','i','s','k'): key = "disc";
247 parse = mov_metadata_track_or_disc_number; break;
248 case MKTAG( 't','v','e','s'): key = "episode_sort";
249 parse = mov_metadata_int8_bypass_padding; break;
250 case MKTAG( 't','v','s','n'): key = "season_number";
251 parse = mov_metadata_int8_bypass_padding; break;
252 case MKTAG( 's','t','i','k'): key = "media_type";
253 parse = mov_metadata_int8_no_padding; break;
254 case MKTAG( 'h','d','v','d'): key = "hd_video";
255 parse = mov_metadata_int8_no_padding; break;
256 case MKTAG( 'p','g','a','p'): key = "gapless_playback";
257 parse = mov_metadata_int8_no_padding; break;
258 }
259
260 if (c->itunes_metadata && atom.size > 8) {
261 int data_size = avio_rb32(pb);
262 int tag = avio_rl32(pb);
263 if (tag == MKTAG('d','a','t','a')) {
264 data_type = avio_rb32(pb); // type
265 avio_rb32(pb); // unknown
266 str_size = data_size - 16;
267 atom.size -= 16;
268
269 if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
270 int ret = mov_read_covr(c, pb, data_type, str_size);
271 if (ret < 0) {
272 av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
273 return ret;
274 }
275 }
276 } else return 0;
277 } else if (atom.size > 4 && key && !c->itunes_metadata) {
278 str_size = avio_rb16(pb); // string length
279 langcode = avio_rb16(pb);
280 ff_mov_lang_to_iso639(langcode, language);
281 atom.size -= 4;
282 } else
283 str_size = atom.size;
284
285 #ifdef MOV_EXPORT_ALL_METADATA
286 if (!key) {
287 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
288 key = tmp_key;
289 }
290 #endif
291
292 if (!key)
293 return 0;
294 if (atom.size < 0)
295 return AVERROR_INVALIDDATA;
296
297 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
298
299 if (parse)
300 parse(c, pb, str_size, key);
301 else {
302 if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
303 mov_read_mac_string(c, pb, str_size, str, sizeof(str));
304 } else {
305 avio_read(pb, str, str_size);
306 str[str_size] = 0;
307 }
308 av_dict_set(&c->fc->metadata, key, str, 0);
309 if (*language && strcmp(language, "und")) {
310 snprintf(key2, sizeof(key2), "%s-%s", key, language);
311 av_dict_set(&c->fc->metadata, key2, str, 0);
312 }
313 }
314 av_dlog(c->fc, "lang \"%3s\" ", language);
315 av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
316 key, str, (char*)&atom.type, str_size, atom.size);
317
318 return 0;
319 }
320
321 static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
322 {
323 int64_t start;
324 int i, nb_chapters, str_len, version;
325 char str[256+1];
326
327 if ((atom.size -= 5) < 0)
328 return 0;
329
330 version = avio_r8(pb);
331 avio_rb24(pb);
332 if (version)
333 avio_rb32(pb); // ???
334 nb_chapters = avio_r8(pb);
335
336 for (i = 0; i < nb_chapters; i++) {
337 if (atom.size < 9)
338 return 0;
339
340 start = avio_rb64(pb);
341 str_len = avio_r8(pb);
342
343 if ((atom.size -= 9+str_len) < 0)
344 return 0;
345
346 avio_read(pb, str, str_len);
347 str[str_len] = 0;
348 avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
349 }
350 return 0;
351 }
352
353 #define MIN_DATA_ENTRY_BOX_SIZE 12
354 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
355 {
356 AVStream *st;
357 MOVStreamContext *sc;
358 int entries, i, j;
359
360 if (c->fc->nb_streams < 1)
361 return 0;
362 st = c->fc->streams[c->fc->nb_streams-1];
363 sc = st->priv_data;
364
365 avio_rb32(pb); // version + flags
366 entries = avio_rb32(pb);
367 if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
368 entries >= UINT_MAX / sizeof(*sc->drefs))
369 return AVERROR_INVALIDDATA;
370 av_free(sc->drefs);
371 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
372 if (!sc->drefs)
373 return AVERROR(ENOMEM);
374 sc->drefs_count = entries;
375
376 for (i = 0; i < sc->drefs_count; i++) {
377 MOVDref *dref = &sc->drefs[i];
378 uint32_t size = avio_rb32(pb);
379 int64_t next = avio_tell(pb) + size - 4;
380
381 if (size < 12)
382 return AVERROR_INVALIDDATA;
383
384 dref->type = avio_rl32(pb);
385 avio_rb32(pb); // version + flags
386 av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
387
388 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
389 /* macintosh alias record */
390 uint16_t volume_len, len;
391 int16_t type;
392
393 avio_skip(pb, 10);
394
395 volume_len = avio_r8(pb);
396 volume_len = FFMIN(volume_len, 27);
397 avio_read(pb, dref->volume, 27);
398 dref->volume[volume_len] = 0;
399 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
400
401 avio_skip(pb, 12);
402
403 len = avio_r8(pb);
404 len = FFMIN(len, 63);
405 avio_read(pb, dref->filename, 63);
406 dref->filename[len] = 0;
407 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
408
409 avio_skip(pb, 16);
410
411 /* read next level up_from_alias/down_to_target */
412 dref->nlvl_from = avio_rb16(pb);
413 dref->nlvl_to = avio_rb16(pb);
414 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
415 dref->nlvl_from, dref->nlvl_to);
416
417 avio_skip(pb, 16);
418
419 for (type = 0; type != -1 && avio_tell(pb) < next; ) {
420 if (pb->eof_reached)
421 return AVERROR_EOF;
422 type = avio_rb16(pb);
423 len = avio_rb16(pb);
424 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
425 if (len&1)
426 len += 1;
427 if (type == 2) { // absolute path
428 av_free(dref->path);
429 dref->path = av_mallocz(len+1);
430 if (!dref->path)
431 return AVERROR(ENOMEM);
432 avio_read(pb, dref->path, len);
433 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
434 len -= volume_len;
435 memmove(dref->path, dref->path+volume_len, len);
436 dref->path[len] = 0;
437 }
438 for (j = 0; j < len; j++)
439 if (dref->path[j] == ':')
440 dref->path[j] = '/';
441 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
442 } else if (type == 0) { // directory name
443 av_free(dref->dir);
444 dref->dir = av_malloc(len+1);
445 if (!dref->dir)
446 return AVERROR(ENOMEM);
447 avio_read(pb, dref->dir, len);
448 dref->dir[len] = 0;
449 for (j = 0; j < len; j++)
450 if (dref->dir[j] == ':')
451 dref->dir[j] = '/';
452 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
453 } else
454 avio_skip(pb, len);
455 }
456 }
457 avio_seek(pb, next, SEEK_SET);
458 }
459 return 0;
460 }
461
462 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
463 {
464 AVStream *st;
465 uint32_t type;
466 uint32_t av_unused ctype;
467
468 if (c->fc->nb_streams < 1) // meta before first trak
469 return 0;
470
471 st = c->fc->streams[c->fc->nb_streams-1];
472
473 avio_r8(pb); /* version */
474 avio_rb24(pb); /* flags */
475
476 /* component type */
477 ctype = avio_rl32(pb);
478 type = avio_rl32(pb); /* component subtype */
479
480 av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
481 av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
482
483 if (type == MKTAG('v','i','d','e'))
484 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
485 else if (type == MKTAG('s','o','u','n'))
486 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
487 else if (type == MKTAG('m','1','a',' '))
488 st->codec->codec_id = AV_CODEC_ID_MP2;
489 else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
490 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
491
492 avio_rb32(pb); /* component manufacture */
493 avio_rb32(pb); /* component flags */
494 avio_rb32(pb); /* component flags mask */
495
496 return 0;
497 }
498
499 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
500 {
501 AVStream *st;
502 int tag;
503
504 if (fc->nb_streams < 1)
505 return 0;
506 st = fc->streams[fc->nb_streams-1];
507
508 avio_rb32(pb); /* version + flags */
509 ff_mp4_read_descr(fc, pb, &tag);
510 if (tag == MP4ESDescrTag) {
511 ff_mp4_parse_es_descr(pb, NULL);
512 } else
513 avio_rb16(pb); /* ID */
514
515 ff_mp4_read_descr(fc, pb, &tag);
516 if (tag == MP4DecConfigDescrTag)
517 ff_mp4_read_dec_config_descr(fc, st, pb);
518 return 0;
519 }
520
521 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
522 {
523 return ff_mov_read_esds(c->fc, pb, atom);
524 }
525
526 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
527 {
528 AVStream *st;
529 int ac3info, acmod, lfeon, bsmod;
530
531 if (c->fc->nb_streams < 1)
532 return 0;
533 st = c->fc->streams[c->fc->nb_streams-1];
534
535 ac3info = avio_rb24(pb);
536 bsmod = (ac3info >> 14) & 0x7;
537 acmod = (ac3info >> 11) & 0x7;
538 lfeon = (ac3info >> 10) & 0x1;
539 st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
540 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
541 if (lfeon)
542 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
543 st->codec->audio_service_type = bsmod;
544 if (st->codec->channels > 1 && bsmod == 0x7)
545 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
546
547 return 0;
548 }
549
550 static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
551 {
552 AVStream *st;
553 int eac3info, acmod, lfeon, bsmod;
554
555 if (c->fc->nb_streams < 1)
556 return 0;
557 st = c->fc->streams[c->fc->nb_streams-1];
558
559 /* No need to parse fields for additional independent substreams and its
560 * associated dependent substreams since libavcodec's E-AC-3 decoder
561 * does not support them yet. */
562 avio_rb16(pb); /* data_rate and num_ind_sub */
563 eac3info = avio_rb24(pb);
564 bsmod = (eac3info >> 12) & 0x1f;
565 acmod = (eac3info >> 9) & 0x7;
566 lfeon = (eac3info >> 8) & 0x1;
567 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
568 if (lfeon)
569 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
570 st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
571 st->codec->audio_service_type = bsmod;
572 if (st->codec->channels > 1 && bsmod == 0x7)
573 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
574
575 return 0;
576 }
577
578 static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
579 {
580 AVStream *st;
581
582 if (c->fc->nb_streams < 1)
583 return 0;
584 st = c->fc->streams[c->fc->nb_streams-1];
585
586 if (atom.size < 16)
587 return 0;
588
589 ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
590
591 return 0;
592 }
593
594 static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
595 {
596 AVStream *st;
597
598 if (c->fc->nb_streams < 1)
599 return 0;
600 st = c->fc->streams[c->fc->nb_streams-1];
601
602 ff_get_wav_header(pb, st->codec, atom.size);
603
604 return 0;
605 }
606
607 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
608 {
609 const int num = avio_rb32(pb);
610 const int den = avio_rb32(pb);
611 AVStream *st;
612
613 if (c->fc->nb_streams < 1)
614 return 0;
615 st = c->fc->streams[c->fc->nb_streams-1];
616
617 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
618 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
619 av_log(c->fc, AV_LOG_WARNING,
620 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
621 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
622 num, den);
623 } else if (den != 0) {
624 st->sample_aspect_ratio.num = num;
625 st->sample_aspect_ratio.den = den;
626 }
627 return 0;
628 }
629
630 /* this atom contains actual media data */
631 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
632 {
633 if (atom.size == 0) /* wrong one (MP4) */
634 return 0;
635 c->found_mdat=1;
636 return 0; /* now go for moov */
637 }
638
639 /* read major brand, minor version and compatible brands and store them as metadata */
640 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
641 {
642 uint32_t minor_ver;
643 int comp_brand_size;
644 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
645 char* comp_brands_str;
646 uint8_t type[5] = {0};
647
648 avio_read(pb, type, 4);
649 if (strcmp(type, "qt "))
650 c->isom = 1;
651 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
652 av_dict_set(&c->fc->metadata, "major_brand", type, 0);
653 minor_ver = avio_rb32(pb); /* minor version */
654 snprintf(minor_ver_str, sizeof(minor_ver_str), "%"PRIu32"", minor_ver);
655 av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
656
657 comp_brand_size = atom.size - 8;
658 if (comp_brand_size < 0)
659 return AVERROR_INVALIDDATA;
660 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
661 if (!comp_brands_str)
662 return AVERROR(ENOMEM);
663 avio_read(pb, comp_brands_str, comp_brand_size);
664 comp_brands_str[comp_brand_size] = 0;
665 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
666 av_freep(&comp_brands_str);
667
668 return 0;
669 }
670
671 /* this atom should contain all header atoms */
672 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
673 {
674 int ret;
675
676 if ((ret = mov_read_default(c, pb, atom)) < 0)
677 return ret;
678 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
679 /* so we don't parse the whole file if over a network */
680 c->found_moov=1;
681 return 0; /* now go for mdat */
682 }
683
684 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
685 {
686 c->fragment.moof_offset = avio_tell(pb) - 8;
687 av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
688 return mov_read_default(c, pb, atom);
689 }
690
691 static void mov_metadata_creation_time(AVDictionary **metadata, time_t time)
692 {
693 char buffer[32];
694 if (time) {
695 struct tm *ptm;
696 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
697 ptm = gmtime(&time);
698 if (!ptm) return;
699 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
700 av_dict_set(metadata, "creation_time", buffer, 0);
701 }
702 }
703
704 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
705 {
706 AVStream *st;
707 MOVStreamContext *sc;
708 int version;
709 char language[4] = {0};
710 unsigned lang;
711 time_t creation_time;
712
713 if (c->fc->nb_streams < 1)
714 return 0;
715 st = c->fc->streams[c->fc->nb_streams-1];
716 sc = st->priv_data;
717
718 if (sc->time_scale) {
719 av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
720 return AVERROR_INVALIDDATA;
721 }
722
723 version = avio_r8(pb);
724 if (version > 1) {
725 avpriv_request_sample(c->fc, "Version %d", version);
726 return AVERROR_PATCHWELCOME;
727 }
728 avio_rb24(pb); /* flags */
729 if (version == 1) {
730 creation_time = avio_rb64(pb);
731 avio_rb64(pb);
732 } else {
733 creation_time = avio_rb32(pb);
734 avio_rb32(pb); /* modification time */
735 }
736 mov_metadata_creation_time(&st->metadata, creation_time);
737
738 sc->time_scale = avio_rb32(pb);
739 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
740
741 lang = avio_rb16(pb); /* language */
742 if (ff_mov_lang_to_iso639(lang, language))
743 av_dict_set(&st->metadata, "language", language, 0);
744 avio_rb16(pb); /* quality */
745
746 return 0;
747 }
748
749 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
750 {
751 time_t creation_time;
752 int version = avio_r8(pb); /* version */
753 avio_rb24(pb); /* flags */
754
755 if (version == 1) {
756 creation_time = avio_rb64(pb);
757 avio_rb64(pb);
758 } else {
759 creation_time = avio_rb32(pb);
760 avio_rb32(pb); /* modification time */
761 }
762 mov_metadata_creation_time(&c->fc->metadata, creation_time);
763 c->time_scale = avio_rb32(pb); /* time scale */
764
765 av_dlog(c->fc, "time scale = %i\n", c->time_scale);
766
767 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
768 avio_rb32(pb); /* preferred scale */
769
770 avio_rb16(pb); /* preferred volume */
771
772 avio_skip(pb, 10); /* reserved */
773
774 avio_skip(pb, 36); /* display matrix */
775
776 avio_rb32(pb); /* preview time */
777 avio_rb32(pb); /* preview duration */
778 avio_rb32(pb); /* poster time */
779 avio_rb32(pb); /* selection time */
780 avio_rb32(pb); /* selection duration */
781 avio_rb32(pb); /* current time */
782 avio_rb32(pb); /* next track ID */
783
784 return 0;
785 }
786
787 static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
788 {
789 AVStream *st;
790
791 if (c->fc->nb_streams < 1)
792 return 0;
793 st = c->fc->streams[c->fc->nb_streams-1];
794
795 if ((uint64_t)atom.size > (1<<30))
796 return AVERROR_INVALIDDATA;
797
798 // currently SVQ3 decoder expect full STSD header - so let's fake it
799 // this should be fixed and just SMI header should be passed
800 av_free(st->codec->extradata);
801 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
802 if (!st->codec->extradata)
803 return AVERROR(ENOMEM);
804 st->codec->extradata_size = 0x5a + atom.size;
805 memcpy(st->codec->extradata, "SVQ3", 4); // fake
806 avio_read(pb, st->codec->extradata + 0x5a, atom.size);
807 av_dlog(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
808 return 0;
809 }
810
811 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
812 {
813 AVStream *st;
814 int little_endian;
815
816 if (c->fc->nb_streams < 1)
817 return 0;
818 st = c->fc->streams[c->fc->nb_streams-1];
819
820 little_endian = avio_rb16(pb);
821 av_dlog(c->fc, "enda %d\n", little_endian);
822 if (little_endian == 1) {
823 switch (st->codec->codec_id) {
824 case AV_CODEC_ID_PCM_S24BE:
825 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
826 break;
827 case AV_CODEC_ID_PCM_S32BE:
828 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
829 break;
830 case AV_CODEC_ID_PCM_F32BE:
831 st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
832 break;
833 case AV_CODEC_ID_PCM_F64BE:
834 st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
835 break;
836 default:
837 break;
838 }
839 }
840 return 0;
841 }
842
843 static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
844 {
845 AVStream *st;
846 unsigned mov_field_order;
847 enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
848
849 if (c->fc->nb_streams < 1) // will happen with jp2 files
850 return 0;
851 st = c->fc->streams[c->fc->nb_streams-1];
852 if (atom.size < 2)
853 return AVERROR_INVALIDDATA;
854 mov_field_order = avio_rb16(pb);
855 if ((mov_field_order & 0xFF00) == 0x0100)
856 decoded_field_order = AV_FIELD_PROGRESSIVE;
857 else if ((mov_field_order & 0xFF00) == 0x0200) {
858 switch (mov_field_order & 0xFF) {
859 case 0x01: decoded_field_order = AV_FIELD_TT;
860 break;
861 case 0x06: decoded_field_order = AV_FIELD_BB;
862 break;
863 case 0x09: decoded_field_order = AV_FIELD_TB;
864 break;
865 case 0x0E: decoded_field_order = AV_FIELD_BT;
866 break;
867 }
868 }
869 if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
870 av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
871 }
872 st->codec->field_order = decoded_field_order;
873
874 return 0;
875 }
876
877 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
878 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
879 {
880 AVStream *st;
881 uint64_t size;
882 uint8_t *buf;
883 int err;
884
885 if (c->fc->nb_streams < 1) // will happen with jp2 files
886 return 0;
887 st= c->fc->streams[c->fc->nb_streams-1];
888 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
889 if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
890 return AVERROR_INVALIDDATA;
891 if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
892 st->codec->extradata_size = 0;
893 return err;
894 }
895 buf = st->codec->extradata + st->codec->extradata_size;
896 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
897 AV_WB32( buf , atom.size + 8);
898 AV_WL32( buf + 4, atom.type);
899 avio_read(pb, buf + 8, atom.size);
900 return 0;
901 }
902
903 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
904 {
905 AVStream *st;
906
907 if (c->fc->nb_streams < 1)
908 return 0;
909 st = c->fc->streams[c->fc->nb_streams-1];
910
911 if ((uint64_t)atom.size > (1<<30))
912 return AVERROR_INVALIDDATA;
913
914 if (st->codec->codec_id == AV_CODEC_ID_QDM2 || st->codec->codec_id == AV_CODEC_ID_QDMC) {
915 // pass all frma atom to codec, needed at least for QDMC and QDM2
916 av_free(st->codec->extradata);
917 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
918 if (!st->codec->extradata)
919 return AVERROR(ENOMEM);
920 st->codec->extradata_size = atom.size;
921 avio_read(pb, st->codec->extradata, atom.size);
922 } else if (atom.size > 8) { /* to read frma, esds atoms */
923 int ret;
924 if ((ret = mov_read_default(c, pb, atom)) < 0)
925 return ret;
926 } else
927 avio_skip(pb, atom.size);
928 return 0;
929 }
930
931 /**
932 * This function reads atom content and puts data in extradata without tag
933 * nor size unlike mov_read_extradata.
934 */
935 static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
936 {
937 AVStream *st;
938
939 if (c->fc->nb_streams < 1)
940 return 0;
941 st = c->fc->streams[c->fc->nb_streams-1];
942
943 if ((uint64_t)atom.size > (1<<30))
944 return AVERROR_INVALIDDATA;
945
946 if (atom.size >= 10) {
947 // Broken files created by legacy versions of libavformat will
948 // wrap a whole fiel atom inside of a glbl atom.
949 unsigned size = avio_rb32(pb);
950 unsigned type = avio_rl32(pb);
951 avio_seek(pb, -8, SEEK_CUR);
952 if (type == MKTAG('f','i','e','l') && size == atom.size)
953 return mov_read_default(c, pb, atom);
954 }
955 av_free(st->codec->extradata);
956 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
957 if (!st->codec->extradata)
958 return AVERROR(ENOMEM);
959 st->codec->extradata_size = atom.size;
960 avio_read(pb, st->codec->extradata, atom.size);
961 return 0;
962 }
963
964 static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
965 {
966 AVStream *st;
967 uint8_t profile_level;
968
969 if (c->fc->nb_streams < 1)
970 return 0;
971 st = c->fc->streams[c->fc->nb_streams-1];
972
973 if (atom.size >= (1<<28) || atom.size < 7)
974 return AVERROR_INVALIDDATA;
975
976 profile_level = avio_r8(pb);
977 if ((profile_level & 0xf0) != 0xc0)
978 return 0;
979
980 av_free(st->codec->extradata);
981 st->codec->extradata = av_mallocz(atom.size - 7 + FF_INPUT_BUFFER_PADDING_SIZE);
982 if (!st->codec->extradata)
983 return AVERROR(ENOMEM);
984 st->codec->extradata_size = atom.size - 7;
985 avio_seek(pb, 6, SEEK_CUR);
986 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
987 return 0;
988 }
989
990 /**
991 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
992 * but can have extradata appended at the end after the 40 bytes belonging
993 * to the struct.
994 */
995 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
996 {
997 AVStream *st;
998
999 if (c->fc->nb_streams < 1)
1000 return 0;
1001 if (atom.size <= 40)
1002 return 0;
1003 st = c->fc->streams[c->fc->nb_streams-1];
1004
1005 if ((uint64_t)atom.size > (1<<30))
1006 return AVERROR_INVALIDDATA;
1007
1008 av_free(st->codec->extradata);
1009 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
1010 if (!st->codec->extradata)
1011 return AVERROR(ENOMEM);
1012 st->codec->extradata_size = atom.size - 40;
1013 avio_skip(pb, 40);
1014 avio_read(pb, st->codec->extradata, atom.size - 40);
1015 return 0;
1016 }
1017
1018 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1019 {
1020 AVStream *st;
1021 MOVStreamContext *sc;
1022 unsigned int i, entries;
1023
1024 if (c->fc->nb_streams < 1)
1025 return 0;
1026 st = c->fc->streams[c->fc->nb_streams-1];
1027 sc = st->priv_data;
1028
1029 avio_r8(pb); /* version */
1030 avio_rb24(pb); /* flags */
1031
1032 entries = avio_rb32(pb);
1033
1034 if (!entries)
1035 return 0;
1036 if (entries >= UINT_MAX/sizeof(int64_t))
1037 return AVERROR_INVALIDDATA;
1038
1039 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1040 if (!sc->chunk_offsets)
1041 return AVERROR(ENOMEM);
1042 sc->chunk_count = entries;
1043
1044 if (atom.type == MKTAG('s','t','c','o'))
1045 for (i = 0; i < entries && !pb->eof_reached; i++)
1046 sc->chunk_offsets[i] = avio_rb32(pb);
1047 else if (atom.type == MKTAG('c','o','6','4'))
1048 for (i = 0; i < entries && !pb->eof_reached; i++)
1049 sc->chunk_offsets[i] = avio_rb64(pb);
1050 else
1051 return AVERROR_INVALIDDATA;
1052
1053 sc->chunk_count = i;
1054
1055 if (pb->eof_reached)
1056 return AVERROR_EOF;
1057
1058 return 0;
1059 }
1060
1061 /**
1062 * Compute codec id for 'lpcm' tag.
1063 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1064 */
1065 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1066 {
1067 /* lpcm flags:
1068 * 0x1 = float
1069 * 0x2 = big-endian
1070 * 0x4 = signed
1071 */
1072 return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1073 }
1074
1075 static int mov_codec_id(AVStream *st, uint32_t format)
1076 {
1077 int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1078
1079 if (id <= 0 &&
1080 ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1081 (format & 0xFFFF) == 'T' + ('S' << 8)))
1082 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1083
1084 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1085 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1086 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1087 /* skip old asf mpeg4 tag */
1088 format && format != MKTAG('m','p','4','s')) {
1089 id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1090 if (id <= 0)
1091 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1092 if (id > 0)
1093 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1094 else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1095 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1096 if (id > 0)
1097 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1098 }
1099 }
1100
1101 st->codec->codec_tag = format;
1102
1103 return id;
1104 }
1105
1106 static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1107 AVStream *st, MOVStreamContext *sc)
1108 {
1109 unsigned int color_depth, len, j;
1110 int color_greyscale;
1111 int color_table_id;
1112
1113 avio_rb16(pb); /* version */
1114 avio_rb16(pb); /* revision level */
1115 avio_rb32(pb); /* vendor */
1116 avio_rb32(pb); /* temporal quality */
1117 avio_rb32(pb); /* spatial quality */
1118
1119 st->codec->width = avio_rb16(pb); /* width */
1120 st->codec->height = avio_rb16(pb); /* height */
1121
1122 avio_rb32(pb); /* horiz resolution */
1123 avio_rb32(pb); /* vert resolution */
1124 avio_rb32(pb); /* data size, always 0 */
1125 avio_rb16(pb); /* frames per samples */
1126
1127 len = avio_r8(pb); /* codec name, pascal string */
1128 if (len > 31)
1129 len = 31;
1130 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1131 if (len < 31)
1132 avio_skip(pb, 31 - len);
1133 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1134 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1135 st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1136 /* Flash Media Server uses tag H263 with Sorenson Spark */
1137 if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1138 !memcmp(st->codec->codec_name, "Sorenson H263", 13))
1139 st->codec->codec_id = AV_CODEC_ID_FLV1;
1140
1141 st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1142 color_table_id = avio_rb16(pb); /* colortable id */
1143 av_dlog(c->fc, "depth %d, ctab id %d\n",
1144 st->codec->bits_per_coded_sample, color_table_id);
1145 /* figure out the palette situation */
1146 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1147 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1148
1149 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1150 if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1151 /* for palette traversal */
1152 unsigned int color_start, color_count, color_end;
1153 unsigned char r, g, b;
1154
1155 if (color_greyscale) {
1156 int color_index, color_dec;
1157 /* compute the greyscale palette */
1158 st->codec->bits_per_coded_sample = color_depth;
1159 color_count = 1 << color_depth;
1160 color_index = 255;
1161 color_dec = 256 / (color_count - 1);
1162 for (j = 0; j < color_count; j++) {
1163 r = g = b = color_index;
1164 sc->palette[j] = (r << 16) | (g << 8) | (b);
1165 color_index -= color_dec;
1166 if (color_index < 0)
1167 color_index = 0;
1168 }
1169 } else if (color_table_id) {
1170 const uint8_t *color_table;
1171 /* if flag bit 3 is set, use the default palette */
1172 color_count = 1 << color_depth;
1173 if (color_depth == 2)
1174 color_table = ff_qt_default_palette_4;
1175 else if (color_depth == 4)
1176 color_table = ff_qt_default_palette_16;
1177 else
1178 color_table = ff_qt_default_palette_256;
1179
1180 for (j = 0; j < color_count; j++) {
1181 r = color_table[j * 3 + 0];
1182 g = color_table[j * 3 + 1];
1183 b = color_table[j * 3 + 2];
1184 sc->palette[j] = (r << 16) | (g << 8) | (b);
1185 }
1186 } else {
1187 /* load the palette from the file */
1188 color_start = avio_rb32(pb);
1189 color_count = avio_rb16(pb);
1190 color_end = avio_rb16(pb);
1191 if ((color_start <= 255) && (color_end <= 255)) {
1192 for (j = color_start; j <= color_end; j++) {
1193 /* each R, G, or B component is 16 bits;
1194 * only use the top 8 bits; skip alpha bytes
1195 * up front */
1196 avio_r8(pb);
1197 avio_r8(pb);
1198 r = avio_r8(pb);
1199 avio_r8(pb);
1200 g = avio_r8(pb);
1201 avio_r8(pb);
1202 b = avio_r8(pb);
1203 avio_r8(pb);
1204 sc->palette[j] = (r << 16) | (g << 8) | (b);
1205 }
1206 }
1207 }
1208 sc->has_palette = 1;
1209 }
1210 }
1211
1212 static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1213 AVStream *st, MOVStreamContext *sc)
1214 {
1215 int bits_per_sample, flags;
1216 uint16_t version = avio_rb16(pb);
1217
1218 avio_rb16(pb); /* revision level */
1219 avio_rb32(pb); /* vendor */
1220
1221 st->codec->channels = avio_rb16(pb); /* channel count */
1222 st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1223 av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1224
1225 sc->audio_cid = avio_rb16(pb);
1226 avio_rb16(pb); /* packet size = 0 */
1227
1228 st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1229
1230 // Read QT version 1 fields. In version 0 these do not exist.
1231 av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1232 if (!c->isom) {
1233 if (version == 1) {
1234 sc->samples_per_frame = avio_rb32(pb);
1235 avio_rb32(pb); /* bytes per packet */
1236 sc->bytes_per_frame = avio_rb32(pb);
1237 avio_rb32(pb); /* bytes per sample */
1238 } else if (version == 2) {
1239 avio_rb32(pb); /* sizeof struct only */
1240 st->codec->sample_rate = av_int2double(avio_rb64(pb));
1241 st->codec->channels = avio_rb32(pb);
1242 avio_rb32(pb); /* always 0x7F000000 */
1243 st->codec->bits_per_coded_sample = avio_rb32(pb);
1244
1245 flags = avio_rb32(pb); /* lpcm format specific flag */
1246 sc->bytes_per_frame = avio_rb32(pb);
1247 sc->samples_per_frame = avio_rb32(pb);
1248 if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1249 st->codec->codec_id =
1250 ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1251 flags);
1252 }
1253 }
1254
1255 switch (st->codec->codec_id) {
1256 case AV_CODEC_ID_PCM_S8:
1257 case AV_CODEC_ID_PCM_U8:
1258 if (st->codec->bits_per_coded_sample == 16)
1259 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1260 break;
1261 case AV_CODEC_ID_PCM_S16LE:
1262 case AV_CODEC_ID_PCM_S16BE:
1263 if (st->codec->bits_per_coded_sample == 8)
1264 st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1265 else if (st->codec->bits_per_coded_sample == 24)
1266 st->codec->codec_id =
1267 st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1268 AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1269 break;
1270 /* set values for old format before stsd version 1 appeared */
1271 case AV_CODEC_ID_MACE3:
1272 sc->samples_per_frame = 6;
1273 sc->bytes_per_frame = 2 * st->codec->channels;
1274 break;
1275 case AV_CODEC_ID_MACE6:
1276 sc->samples_per_frame = 6;
1277 sc->bytes_per_frame = 1 * st->codec->channels;
1278 break;
1279 case AV_CODEC_ID_ADPCM_IMA_QT:
1280 sc->samples_per_frame = 64;
1281 sc->bytes_per_frame = 34 * st->codec->channels;
1282 break;
1283 case AV_CODEC_ID_GSM:
1284 sc->samples_per_frame = 160;
1285 sc->bytes_per_frame = 33;
1286 break;
1287 default:
1288 break;
1289 }
1290
1291 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1292 if (bits_per_sample) {
1293 st->codec->bits_per_coded_sample = bits_per_sample;
1294 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1295 }
1296 }
1297
1298 static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1299 AVStream *st, MOVStreamContext *sc,
1300 int size)
1301 {
1302 // ttxt stsd contains display flags, justification, background
1303 // color, fonts, and default styles, so fake an atom to read it
1304 MOVAtom fake_atom = { .size = size };
1305 // mp4s contains a regular esds atom
1306 if (st->codec->codec_tag != AV_RL32("mp4s"))
1307 mov_read_glbl(c, pb, fake_atom);
1308 st->codec->width = sc->width;
1309 st->codec->height = sc->height;
1310 }
1311
1312 static uint32_t yuv_to_rgba(uint32_t ycbcr)
1313 {
1314 uint8_t r, g, b;
1315 int y, cb, cr;
1316
1317 y = (ycbcr >> 16) & 0xFF;
1318 cr = (ycbcr >> 8) & 0xFF;
1319 cb = ycbcr & 0xFF;
1320
1321 b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
1322 g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
1323 r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
1324
1325 return (r << 16) | (g << 8) | b;
1326 }
1327
1328 static int mov_rewrite_dvd_sub_extradata(AVStream *st)
1329 {
1330 char buf[256] = {0};
1331 uint8_t *src = st->codec->extradata;
1332 int i;
1333
1334 if (st->codec->extradata_size != 64)
1335 return 0;
1336
1337 if (st->codec->width > 0 && st->codec->height > 0)
1338 snprintf(buf, sizeof(buf), "size: %dx%d\n",
1339 st->codec->width, st->codec->height);
1340 av_strlcat(buf, "palette: ", sizeof(buf));
1341
1342 for (i = 0; i < 16; i++) {
1343 uint32_t yuv = AV_RB32(src + i * 4);
1344 uint32_t rgba = yuv_to_rgba(yuv);
1345
1346 av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
1347 }
1348
1349 if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
1350 return 0;
1351
1352 av_freep(&st->codec->extradata);
1353 st->codec->extradata_size = 0;
1354 st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
1355 if (!st->codec->extradata)
1356 return AVERROR(ENOMEM);
1357 st->codec->extradata_size = strlen(buf);
1358 memcpy(st->codec->extradata, buf, st->codec->extradata_size);
1359
1360 return 0;
1361 }
1362
1363 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1364 AVStream *st, MOVStreamContext *sc,
1365 int size)
1366 {
1367 if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1368 st->codec->extradata_size = size;
1369 st->codec->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
1370 if (!st->codec->extradata)
1371 return AVERROR(ENOMEM);
1372 avio_read(pb, st->codec->extradata, size);
1373 } else {
1374 /* other codec type, just skip (rtp, mp4s ...) */
1375 avio_skip(pb, size);
1376 }
1377 return 0;
1378 }
1379
1380 static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1381 AVStream *st, MOVStreamContext *sc)
1382 {
1383 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1384 !st->codec->sample_rate && sc->time_scale > 1)
1385 st->codec->sample_rate = sc->time_scale;
1386
1387 /* special codec parameters handling */
1388 switch (st->codec->codec_id) {
1389 #if CONFIG_DV_DEMUXER
1390 case AV_CODEC_ID_DVAUDIO:
1391 c->dv_fctx = avformat_alloc_context();
1392 c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1393 if (!c->dv_demux) {
1394 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1395 return AVERROR(ENOMEM);
1396 }
1397 sc->dv_audio_container = 1;
1398 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1399 break;
1400 #endif
1401 /* no ifdef since parameters are always those */
1402 case AV_CODEC_ID_QCELP:
1403 st->codec->channels = 1;
1404 // force sample rate for qcelp when not stored in mov
1405 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1406 st->codec->sample_rate = 8000;
1407 break;
1408 case AV_CODEC_ID_AMR_NB:
1409 st->codec->channels = 1;
1410 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1411 st->codec->sample_rate = 8000;
1412 break;
1413 case AV_CODEC_ID_AMR_WB:
1414 st->codec->channels = 1;
1415 st->codec->sample_rate = 16000;
1416 break;
1417 case AV_CODEC_ID_MP2:
1418 case AV_CODEC_ID_MP3:
1419 /* force type after stsd for m1a hdlr */
1420 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1421 st->need_parsing = AVSTREAM_PARSE_FULL;
1422 break;
1423 case AV_CODEC_ID_GSM:
1424 case AV_CODEC_ID_ADPCM_MS:
1425 case AV_CODEC_ID_ADPCM_IMA_WAV:
1426 case AV_CODEC_ID_ILBC:
1427 st->codec->block_align = sc->bytes_per_frame;
1428 break;
1429 case AV_CODEC_ID_ALAC:
1430 if (st->codec->extradata_size == 36) {
1431 st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1432 st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1433 }
1434 break;
1435 case AV_CODEC_ID_VC1:
1436 st->need_parsing = AVSTREAM_PARSE_FULL;
1437 break;
1438 default:
1439 break;
1440 }
1441 return 0;
1442 }
1443
1444 static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1445 int codec_tag, int format,
1446 int size)
1447 {
1448 int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1449
1450 if (codec_tag &&
1451 (codec_tag == AV_RL32("avc1") ||
1452 codec_tag == AV_RL32("hvc1") ||
1453 codec_tag == AV_RL32("hev1") ||
1454 (codec_tag != format &&
1455 (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1456 : codec_tag != MKTAG('j','p','e','g'))))) {
1457 /* Multiple fourcc, we skip JPEG. This is not correct, we should
1458 * export it as a separate AVStream but this needs a few changes
1459 * in the MOV demuxer, patch welcome. */
1460
1461 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1462 avio_skip(pb, size);
1463 return 1;
1464 }
1465
1466 return 0;
1467 }
1468
1469 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1470 {
1471 AVStream *st;
1472 MOVStreamContext *sc;
1473 int pseudo_stream_id;
1474
1475 if (c->fc->nb_streams < 1)
1476 return 0;
1477 st = c->fc->streams[c->fc->nb_streams-1];
1478 sc = st->priv_data;
1479
1480 for (pseudo_stream_id = 0;
1481 pseudo_stream_id < entries && !pb->eof_reached;
1482 pseudo_stream_id++) {
1483 //Parsing Sample description table
1484 enum AVCodecID id;
1485 int ret, dref_id = 1;
1486 MOVAtom a = { AV_RL32("stsd") };
1487 int64_t start_pos = avio_tell(pb);
1488 uint32_t size = avio_rb32(pb); /* size */
1489 uint32_t format = avio_rl32(pb); /* data format */
1490
1491 if (size >= 16) {
1492 avio_rb32(pb); /* reserved */
1493 avio_rb16(pb); /* reserved */
1494 dref_id = avio_rb16(pb);
1495 } else {
1496 av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRIu32" in stsd\n", size);
1497 return AVERROR_INVALIDDATA;
1498 }
1499
1500 if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1501 size - (avio_tell(pb) - start_pos)))
1502 continue;
1503
1504 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1505 sc->dref_id= dref_id;
1506
1507 id = mov_codec_id(st, format);
1508
1509 av_dlog(c->fc, "size=%"PRIu32" 4CC= %"PRIu8"%"PRIu8"%"PRIu8"%"PRIu8" codec_type=%d\n", size,
1510 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1511 (format >> 24) & 0xff, st->codec->codec_type);
1512
1513 if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1514 st->codec->codec_id = id;
1515 mov_parse_stsd_video(c, pb, st, sc);
1516 } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1517 st->codec->codec_id = id;
1518 mov_parse_stsd_audio(c, pb, st, sc);
1519 } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1520 st->codec->codec_id = id;
1521 mov_parse_stsd_subtitle(c, pb, st, sc,
1522 size - (avio_tell(pb) - start_pos));
1523 } else {
1524 ret = mov_parse_stsd_data(c, pb, st, sc,
1525 size - (avio_tell(pb) - start_pos));
1526 if (ret < 0)
1527 return ret;
1528 }
1529 /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1530 a.size = size - (avio_tell(pb) - start_pos);
1531 if (a.size > 8) {
1532 if ((ret = mov_read_default(c, pb, a)) < 0)
1533 return ret;
1534 } else if (a.size > 0)
1535 avio_skip(pb, a.size);
1536 }
1537
1538 if (pb->eof_reached)
1539 return AVERROR_EOF;
1540
1541 return mov_finalize_stsd_codec(c, pb, st, sc);
1542 }
1543
1544 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1545 {
1546 int entries;
1547
1548 avio_r8(pb); /* version */
1549 avio_rb24(pb); /* flags */
1550 entries = avio_rb32(pb);
1551
1552 return ff_mov_read_stsd_entries(c, pb, entries);
1553 }
1554
1555 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1556 {
1557 AVStream *st;
1558 MOVStreamContext *sc;
1559 unsigned int i, entries;
1560
1561 if (c->fc->nb_streams < 1)
1562 return 0;
1563 st = c->fc->streams[c->fc->nb_streams-1];
1564 sc = st->priv_data;
1565
1566 avio_r8(pb); /* version */
1567 avio_rb24(pb); /* flags */
1568
1569 entries = avio_rb32(pb);
1570
1571 av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1572
1573 if (!entries)
1574 return 0;
1575 if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1576 return AVERROR_INVALIDDATA;
1577 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1578 if (!sc->stsc_data)
1579 return AVERROR(ENOMEM);
1580
1581 for (i = 0; i < entries && !pb->eof_reached; i++) {
1582 sc->stsc_data[i].first = avio_rb32(pb);
1583 sc->stsc_data[i].count = avio_rb32(pb);
1584 sc->stsc_data[i].id = avio_rb32(pb);
1585 }
1586
1587 sc->stsc_count = i;
1588
1589 if (pb->eof_reached)
1590 return AVERROR_EOF;
1591
1592 return 0;
1593 }
1594
1595 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1596 {
1597 AVStream *st;
1598 MOVStreamContext *sc;
1599 unsigned i, entries;
1600
1601 if (c->fc->nb_streams < 1)
1602 return 0;
1603 st = c->fc->streams[c->fc->nb_streams-1];
1604 sc = st->priv_data;
1605
1606 avio_rb32(pb); // version + flags
1607
1608 entries = avio_rb32(pb);
1609 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1610 return AVERROR_INVALIDDATA;
1611 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1612 if (!sc->stps_data)
1613 return AVERROR(ENOMEM);
1614
1615 for (i = 0; i < entries && !pb->eof_reached; i++) {
1616 sc->stps_data[i] = avio_rb32(pb);
1617 //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1618 }
1619
1620 sc->stps_count = i;
1621
1622 if (pb->eof_reached)
1623 return AVERROR_EOF;
1624
1625 return 0;
1626 }
1627
1628 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1629 {
1630 AVStream *st;
1631 MOVStreamContext *sc;
1632 unsigned int i, entries;
1633
1634 if (c->fc->nb_streams < 1)
1635 return 0;
1636 st = c->fc->streams[c->fc->nb_streams-1];
1637 sc = st->priv_data;
1638
1639 avio_r8(pb); /* version */
1640 avio_rb24(pb); /* flags */
1641
1642 entries = avio_rb32(pb);
1643
1644 av_dlog(c->fc, "keyframe_count = %d\n", entries);
1645
1646 if (!entries)
1647 {
1648 sc->keyframe_absent = 1;
1649 return 0;
1650 }
1651 if (entries >= UINT_MAX / sizeof(int))
1652 return AVERROR_INVALIDDATA;
1653 sc->keyframes = av_malloc(entries * sizeof(int));
1654 if (!sc->keyframes)
1655 return AVERROR(ENOMEM);
1656
1657 for (i = 0; i < entries && !pb->eof_reached; i++) {
1658 sc->keyframes[i] = avio_rb32(pb);
1659 //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1660 }
1661
1662 sc->keyframe_count = i;
1663
1664 if (pb->eof_reached)
1665 return AVERROR_EOF;
1666
1667 return 0;
1668 }
1669
1670 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1671 {
1672 AVStream *st;
1673 MOVStreamContext *sc;
1674 unsigned int i, entries, sample_size, field_size, num_bytes;
1675 GetBitContext gb;
1676 unsigned char* buf;
1677
1678 if (c->fc->nb_streams < 1)
1679 return 0;
1680 st = c->fc->streams[c->fc->nb_streams-1];
1681 sc = st->priv_data;
1682
1683 avio_r8(pb); /* version */
1684 avio_rb24(pb); /* flags */
1685
1686 if (atom.type == MKTAG('s','t','s','z')) {
1687 sample_size = avio_rb32(pb);
1688 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1689 sc->sample_size = sample_size;
1690 field_size = 32;
1691 } else {
1692 sample_size = 0;
1693 avio_rb24(pb); /* reserved */
1694 field_size = avio_r8(pb);
1695 }
1696 entries = avio_rb32(pb);
1697
1698 av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1699
1700 sc->sample_count = entries;
1701 if (sample_size)
1702 return 0;
1703
1704 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1705 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1706 return AVERROR_INVALIDDATA;
1707 }
1708
1709 if (!entries)
1710 return 0;
1711 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1712 return AVERROR_INVALIDDATA;
1713 sc->sample_sizes = av_malloc(entries * sizeof(int));
1714 if (!sc->sample_sizes)
1715 return AVERROR(ENOMEM);
1716
1717 num_bytes = (entries*field_size+4)>>3;
1718
1719 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1720 if (!buf) {
1721 av_freep(&sc->sample_sizes);
1722 return AVERROR(ENOMEM);
1723 }
1724
1725 if (avio_read(pb, buf, num_bytes) < num_bytes) {
1726 av_freep(&sc->sample_sizes);
1727 av_free(buf);
1728 return AVERROR_INVALIDDATA;
1729 }
1730
1731 init_get_bits(&gb, buf, 8*num_bytes);
1732
1733 for (i = 0; i < entries && !pb->eof_reached; i++) {
1734 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1735 sc->data_size += sc->sample_sizes[i];
1736 }
1737
1738 sc->sample_count = i;
1739
1740 if (pb->eof_reached)
1741 return AVERROR_EOF;
1742
1743 av_free(buf);
1744 return 0;
1745 }
1746
1747 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1748 {
1749 AVStream *st;
1750 MOVStreamContext *sc;
1751 unsigned int i, entries;
1752 int64_t duration=0;
1753 int64_t total_sample_count=0;
1754
1755 if (c->fc->nb_streams < 1)
1756 return 0;
1757 st = c->fc->streams[c->fc->nb_streams-1];
1758 sc = st->priv_data;
1759
1760 avio_r8(pb); /* version */
1761 avio_rb24(pb); /* flags */
1762 entries = avio_rb32(pb);
1763
1764 av_dlog(c->fc, "track[%i].stts.entries = %i\n",
1765 c->fc->nb_streams-1, entries);
1766
1767 if (!entries)
1768 return 0;
1769 if (entries >= UINT_MAX / sizeof(*sc->stts_data))
1770 return AVERROR(EINVAL);
1771
1772 av_free(sc->stts_data);
1773 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1774 if (!sc->stts_data)
1775 return AVERROR(ENOMEM);
1776
1777 for (i = 0; i < entries && !pb->eof_reached; i++) {
1778 int sample_duration;
1779 int sample_count;
1780
1781 sample_count=avio_rb32(pb);
1782 sample_duration = avio_rb32(pb);
1783 if (sample_count < 0) {
1784 av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
1785 return AVERROR_INVALIDDATA;
1786 }
1787 sc->stts_data[i].count= sample_count;
1788 sc->stts_data[i].duration= sample_duration;
1789
1790 av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
1791 sample_count, sample_duration);
1792
1793 duration+=(int64_t)sample_duration*sample_count;
1794 total_sample_count+=sample_count;
1795 }
1796
1797 sc->stts_count = i;
1798
1799 if (pb->eof_reached)
1800 return AVERROR_EOF;
1801
1802 st->nb_frames= total_sample_count;
1803 if (duration)
1804 st->duration= duration;
1805 sc->track_end = duration;
1806 return 0;
1807 }
1808
1809 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1810 {
1811 AVStream *st;
1812 MOVStreamContext *sc;
1813 unsigned int i, entries;
1814
1815 if (c->fc->nb_streams < 1)
1816 return 0;
1817 st = c->fc->streams[c->fc->nb_streams-1];
1818 sc = st->priv_data;
1819
1820 avio_r8(pb); /* version */
1821 avio_rb24(pb); /* flags */
1822 entries = avio_rb32(pb);
1823
1824 av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1825
1826 if (!entries)
1827 return 0;
1828 if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
1829 return AVERROR_INVALIDDATA;
1830 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1831 if (!sc->ctts_data)
1832 return AVERROR(ENOMEM);
1833
1834 for (i = 0; i < entries && !pb->eof_reached; i++) {
1835 int count =avio_rb32(pb);
1836 int duration =avio_rb32(pb);
1837
1838 sc->ctts_data[i].count = count;
1839 sc->ctts_data[i].duration= duration;
1840 if (duration < 0)
1841 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1842 }
1843
1844 sc->ctts_count = i;
1845
1846 if (pb->eof_reached)
1847 return AVERROR_EOF;
1848
1849 av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
1850
1851 return 0;
1852 }
1853
1854 static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1855 {
1856 AVStream *st;
1857 MOVStreamContext *sc;
1858 unsigned int i, entries;
1859 uint8_t version;
1860 uint32_t grouping_type;
1861
1862 if (c->fc->nb_streams < 1)
1863 return 0;
1864 st = c->fc->streams[c->fc->nb_streams-1];
1865 sc = st->priv_data;
1866
1867 version = avio_r8(pb); /* version */
1868 avio_rb24(pb); /* flags */
1869 grouping_type = avio_rl32(pb);
1870 if (grouping_type != MKTAG( 'r','a','p',' '))
1871 return 0; /* only support 'rap ' grouping */
1872 if (version == 1)
1873 avio_rb32(pb); /* grouping_type_parameter */
1874
1875 entries = avio_rb32(pb);
1876 if (!entries)
1877 return 0;
1878 if (entries >= UINT_MAX / sizeof(*sc->rap_group))
1879 return AVERROR_INVALIDDATA;
1880 sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
1881 if (!sc->rap_group)
1882 return AVERROR(ENOMEM);
1883
1884 for (i = 0; i < entries && !pb->eof_reached; i++) {
1885 sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
1886 sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
1887 }
1888
1889 sc->rap_group_count = i;
1890
1891 return pb->eof_reached ? AVERROR_EOF : 0;
1892 }
1893
1894 static void mov_build_index(MOVContext *mov, AVStream *st)
1895 {
1896 MOVStreamContext *sc = st->priv_data;
1897 int64_t current_offset;
1898 int64_t current_dts = 0;
1899 unsigned int stts_index = 0;
1900 unsigned int stsc_index = 0;
1901 unsigned int stss_index = 0;
1902 unsigned int stps_index = 0;
1903 unsigned int i, j;
1904 uint64_t stream_size = 0;
1905
1906 /* adjust first dts according to edit list */
1907 if (sc->time_offset && mov->time_scale > 0) {
1908 if (sc->time_offset < 0)
1909 sc->time_offset = av_rescale(sc->time_offset, sc->time_scale, mov->time_scale);
1910 current_dts = -sc->time_offset;
1911 if (sc->ctts_data && sc->stts_data && sc->stts_data[0].duration &&
1912 sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1913 /* more than 16 frames delay, dts are likely wrong
1914 this happens with files created by iMovie */
1915 sc->wrong_dts = 1;
1916 st->codec->has_b_frames = 1;
1917 }
1918 }
1919
1920 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1921 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1922 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1923 unsigned int current_sample = 0;
1924 unsigned int stts_sample = 0;
1925 unsigned int sample_size;
1926 unsigned int distance = 0;
1927 unsigned int rap_group_index = 0;
1928 unsigned int rap_group_sample = 0;
1929 int rap_group_present = sc->rap_group_count && sc->rap_group;
1930 int key_off = (sc->keyframes && sc->keyframes[0] > 0) || (sc->stps_data && sc->stps_data[0] > 0);
1931
1932 current_dts -= sc->dts_shift;
1933
1934 if (!sc->sample_count)
1935 return;
1936 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
1937 return;
1938 if (av_reallocp_array(&st->index_entries,
1939 st->nb_index_entries + sc->sample_count,
1940 sizeof(*st->index_entries)) < 0) {
1941 st->nb_index_entries = 0;
1942 return;
1943 }
1944 st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
1945
1946 for (i = 0; i < sc->chunk_count; i++) {
1947 current_offset = sc->chunk_offsets[i];
1948 while (stsc_index + 1 < sc->stsc_count &&
1949 i + 1 == sc->stsc_data[stsc_index + 1].first)
1950 stsc_index++;
1951 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1952 int keyframe = 0;
1953 if (current_sample >= sc->sample_count) {
1954 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1955 return;
1956 }
1957
1958 if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
1959 keyframe = 1;
1960 if (stss_index + 1 < sc->keyframe_count)
1961 stss_index++;
1962 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1963 keyframe = 1;
1964 if (stps_index + 1 < sc->stps_count)
1965 stps_index++;
1966 }
1967 if (rap_group_present && rap_group_index < sc->rap_group_count) {
1968 if (sc->rap_group[rap_group_index].index > 0)
1969 keyframe = 1;
1970 if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
1971 rap_group_sample = 0;
1972 rap_group_index++;
1973 }
1974 }
1975 if (keyframe)
1976 distance = 0;
1977 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1978 if (sc->pseudo_stream_id == -1 ||
1979 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1980 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1981 e->pos = current_offset;
1982 e->timestamp = current_dts;
1983 e->size = sample_size;
1984 e->min_distance = distance;
1985 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1986 av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1987 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1988 current_offset, current_dts, sample_size, distance, keyframe);
1989 }
1990
1991 current_offset += sample_size;
1992 stream_size += sample_size;
1993 current_dts += sc->stts_data[stts_index].duration;
1994 distance++;
1995 stts_sample++;
1996 current_sample++;
1997 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1998 stts_sample = 0;
1999 stts_index++;
2000 }
2001 }
2002 }
2003 if (st->duration > 0)
2004 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2005 } else {
2006 unsigned chunk_samples, total = 0;
2007
2008 // compute total chunk count
2009 for (i = 0; i < sc->stsc_count; i++) {
2010 unsigned count, chunk_count;
2011
2012 chunk_samples = sc->stsc_data[i].count;
2013 if (i != sc->stsc_count - 1 &&
2014 sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2015 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2016 return;
2017 }
2018
2019 if (sc->samples_per_frame >= 160) { // gsm
2020 count = chunk_samples / sc->samples_per_frame;
2021 } else if (sc->samples_per_frame > 1) {
2022 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2023 count = (chunk_samples+samples-1) / samples;
2024 } else {
2025 count = (chunk_samples+1023) / 1024;
2026 }
2027
2028 if (i < sc->stsc_count - 1)
2029 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2030 else
2031 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2032 total += chunk_count * count;
2033 }
2034
2035 av_dlog(mov->fc, "chunk count %d\n", total);
2036 if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2037 return;
2038 if (av_reallocp_array(&st->index_entries,
2039 st->nb_index_entries + total,
2040 sizeof(*st->index_entries)) < 0) {
2041 st->nb_index_entries = 0;
2042 return;
2043 }
2044 st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2045
2046 // populate index
2047 for (i = 0; i < sc->chunk_count; i++) {
2048 current_offset = sc->chunk_offsets[i];
2049 if (stsc_index + 1 < sc->stsc_count &&
2050 i + 1 == sc->stsc_data[stsc_index + 1].first)
2051 stsc_index++;
2052 chunk_samples = sc->stsc_data[stsc_index].count;
2053
2054 while (chunk_samples > 0) {
2055 AVIndexEntry *e;
2056 unsigned size, samples;
2057
2058 if (sc->samples_per_frame >= 160) { // gsm
2059 samples = sc->samples_per_frame;
2060 size = sc->bytes_per_frame;
2061 } else {
2062 if (sc->samples_per_frame > 1) {
2063 samples = FFMIN((1024 / sc->samples_per_frame)*
2064 sc->samples_per_frame, chunk_samples);
2065 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2066 } else {
2067 samples = FFMIN(1024, chunk_samples);
2068 size = samples * sc->sample_size;
2069 }
2070 }
2071
2072 if (st->nb_index_entries >= total) {
2073 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2074 return;
2075 }
2076 e = &st->index_entries[st->nb_index_entries++];
2077 e->pos = current_offset;
2078 e->timestamp = current_dts;
2079 e->size = size;
2080 e->min_distance = 0;
2081 e->flags = AVINDEX_KEYFRAME;
2082 av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2083 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2084 size, samples);
2085
2086 current_offset += size;
2087 current_dts += samples;
2088 chunk_samples -= samples;
2089 }
2090 }
2091 }
2092 }
2093
2094 static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref,
2095 AVIOInterruptCB *int_cb)
2096 {
2097 /* try relative path, we do not try the absolute because it can leak information about our
2098 system to an attacker */
2099 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2100 char filename[1024];
2101 char *src_path;
2102 int i, l;
2103
2104 /* find a source dir */
2105 src_path = strrchr(src, '/');
2106 if (src_path)
2107 src_path++;
2108 else
2109 src_path = src;
2110
2111 /* find a next level down to target */
2112 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2113 if (ref->path[l] == '/') {
2114 if (i == ref->nlvl_to - 1)
2115 break;
2116 else
2117 i++;
2118 }
2119
2120 /* compose filename if next level down to target was found */
2121 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2122 memcpy(filename, src, src_path - src);
2123 filename[src_path - src] = 0;
2124
2125 for (i = 1; i < ref->nlvl_from; i++)
2126 av_strlcat(filename, "../", 1024);
2127
2128 av_strlcat(filename, ref->path + l + 1, 1024);
2129
2130 if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2131 return 0;
2132 }
2133 }
2134
2135 return AVERROR(ENOENT);
2136 }
2137
2138 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2139 {
2140 AVStream *st;
2141 MOVStreamContext *sc;
2142 int ret;
2143
2144 st = avformat_new_stream(c->fc, NULL);
2145 if (!st) return AVERROR(ENOMEM);
2146 st->id = c->fc->nb_streams;
2147 sc = av_mallocz(sizeof(MOVStreamContext));
2148 if (!sc) return AVERROR(ENOMEM);
2149
2150 st->priv_data = sc;
2151 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2152 sc->ffindex = st->index;
2153
2154 if ((ret = mov_read_default(c, pb, atom)) < 0)
2155 return ret;
2156
2157 /* sanity checks */
2158 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2159 (!sc->sample_size && !sc->sample_count))) {
2160 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2161 st->index);
2162 return 0;
2163 }
2164
2165 if (sc->time_scale <= 0) {
2166 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
2167 sc->time_scale = c->time_scale;
2168 if (sc->time_scale <= 0)
2169 sc->time_scale = 1;
2170 }
2171
2172 avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2173
2174 mov_build_index(c, st);
2175
2176 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2177 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2178 if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback) < 0)
2179 av_log(c->fc, AV_LOG_ERROR,
2180 "stream %d, error opening alias: path='%s', dir='%s', "
2181 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2182 st->index, dref->path, dref->dir, dref->filename,
2183 dref->volume, dref->nlvl_from, dref->nlvl_to);
2184 } else
2185 sc->pb = c->fc->pb;
2186
2187 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2188 if (!st->sample_aspect_ratio.num &&
2189 (st->codec->width != sc->width || st->codec->height != sc->height)) {
2190 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2191 ((double)st->codec->width * sc->height), INT_MAX);
2192 }
2193 }
2194
2195 // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2196 if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2197 TAG_IS_AVCI(st->codec->codec_tag)) {
2198 ret = ff_generate_avci_extradata(st);
2199 if (ret < 0)
2200 return ret;
2201 }
2202
2203 switch (st->codec->codec_id) {
2204 #if CONFIG_H261_DECODER
2205 case AV_CODEC_ID_H261:
2206 #endif
2207 #if CONFIG_H263_DECODER
2208 case AV_CODEC_ID_H263:
2209 #endif
2210 #if CONFIG_MPEG4_DECODER
2211 case AV_CODEC_ID_MPEG4:
2212 #endif
2213 st->codec->width = 0; /* let decoder init width/height */
2214 st->codec->height= 0;
2215 break;
2216 }
2217
2218 /* Do not need those anymore. */
2219 av_freep(&sc->chunk_offsets);
2220 av_freep(&sc->stsc_data);
2221 av_freep(&sc->sample_sizes);
2222 av_freep(&sc->keyframes);
2223 av_freep(&sc->stts_data);
2224 av_freep(&sc->stps_data);
2225 av_freep(&sc->rap_group);
2226
2227 return 0;
2228 }
2229
2230 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2231 {
2232 int ret;
2233 c->itunes_metadata = 1;
2234 ret = mov_read_default(c, pb, atom);
2235 c->itunes_metadata = 0;
2236 return ret;
2237 }
2238
2239 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2240 {
2241 while (atom.size > 8) {
2242 uint32_t tag = avio_rl32(pb);
2243 atom.size -= 4;
2244 if (tag == MKTAG('h','d','l','r')) {
2245 avio_seek(pb, -8, SEEK_CUR);
2246 atom.size += 8;
2247 return mov_read_default(c, pb, atom);
2248 }
2249 }
2250 return 0;
2251 }
2252
2253 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2254 {
2255 int i;
2256 int width;
2257 int height;
2258 int64_t disp_transform[2];
2259 int display_matrix[3][2];
2260 AVStream *st;
2261 MOVStreamContext *sc;
2262 int version;
2263 int flags;
2264
2265 if (c->fc->nb_streams < 1)
2266 return 0;
2267 st = c->fc->streams[c->fc->nb_streams-1];
2268 sc = st->priv_data;
2269
2270 version = avio_r8(pb);
2271 flags = avio_rb24(pb);
2272 st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
2273
2274 if (version == 1) {
2275 avio_rb64(pb);
2276 avio_rb64(pb);
2277 } else {
2278 avio_rb32(pb); /* creation time */
2279 avio_rb32(pb); /* modification time */
2280 }
2281 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2282 avio_rb32(pb); /* reserved */
2283
2284 /* highlevel (considering edits) duration in movie timebase */
2285 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2286 avio_rb32(pb); /* reserved */
2287 avio_rb32(pb); /* reserved */
2288
2289 avio_rb16(pb); /* layer */
2290 avio_rb16(pb); /* alternate group */
2291 avio_rb16(pb); /* volume */
2292 avio_rb16(pb); /* reserved */
2293
2294 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2295 // they're kept in fixed point format through all calculations
2296 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
2297 for (i = 0; i < 3; i++) {
2298 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2299 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2300 avio_rb32(pb); // 2.30 fixed point (not used)
2301 }
2302
2303 width = avio_rb32(pb); // 16.16 fixed point track width
2304 height = avio_rb32(pb); // 16.16 fixed point track height
2305 sc->width = width >> 16;
2306 sc->height = height >> 16;
2307
2308 // transform the display width/height according to the matrix
2309 // skip this if the display matrix is the default identity matrix
2310 // or if it is rotating the picture, ex iPhone 3GS
2311 // to keep the same scale, use [width height 1<<16]
2312 if (width && height &&
2313 ((display_matrix[0][0] != 65536 ||
2314 display_matrix[1][1] != 65536) &&
2315 !display_matrix[0][1] &&
2316 !display_matrix[1][0] &&
2317 !display_matrix[2][0] && !display_matrix[2][1])) {
2318 for (i = 0; i < 2; i++)
2319 disp_transform[i] =
2320 (int64_t) width * display_matrix[0][i] +
2321 (int64_t) height * display_matrix[1][i] +
2322 ((int64_t) display_matrix[2][i] << 16);
2323
2324 //sample aspect ratio is new width/height divided by old width/height
2325 st->sample_aspect_ratio = av_d2q(
2326 ((double) disp_transform[0] * height) /
2327 ((double) disp_transform[1] * width), INT_MAX);
2328 }
2329 return 0;
2330 }
2331
2332 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2333 {
2334 MOVFragment *frag = &c->fragment;
2335 MOVTrackExt *trex = NULL;
2336 int flags, track_id, i;
2337
2338 avio_r8(pb); /* version */
2339 flags = avio_rb24(pb);
2340
2341 track_id = avio_rb32(pb);
2342 if (!track_id)
2343 return AVERROR_INVALIDDATA;
2344 frag->track_id = track_id;
2345 for (i = 0; i < c->trex_count; i++)
2346 if (c->trex_data[i].track_id == frag->track_id) {
2347 trex = &c->trex_data[i];
2348 break;
2349 }
2350 if (!trex) {
2351 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2352 return AVERROR_INVALIDDATA;
2353 }
2354
2355 frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2356 avio_rb64(pb) : frag->moof_offset;
2357 frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2358
2359 frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2360 avio_rb32(pb) : trex->duration;
2361 frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2362 avio_rb32(pb) : trex->size;
2363 frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2364 avio_rb32(pb) : trex->flags;
2365 av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2366 return 0;
2367 }
2368
2369 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2370 {
2371 c->chapter_track = avio_rb32(pb);
2372 return 0;
2373 }
2374
2375 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2376 {
2377 MOVTrackExt *trex;
2378 int err;
2379
2380 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2381 return AVERROR_INVALIDDATA;
2382 if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2383 sizeof(*c->trex_data))) < 0) {
2384 c->trex_count = 0;
2385 return err;
2386 }
2387 trex = &c->trex_data[c->trex_count++];
2388 avio_r8(pb); /* version */
2389 avio_rb24(pb); /* flags */
2390 trex->track_id = avio_rb32(pb);
2391 trex->stsd_id = avio_rb32(pb);
2392 trex->duration = avio_rb32(pb);
2393 trex->size = avio_rb32(pb);
2394 trex->flags = avio_rb32(pb);
2395 return 0;
2396 }
2397
2398 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2399 {
2400 MOVFragment *frag = &c->fragment;
2401 AVStream *st = NULL;
2402 MOVStreamContext *sc;
2403 MOVStts *ctts_data;
2404 uint64_t offset;
2405 int64_t dts;
2406 int data_offset = 0;
2407 unsigned entries, first_sample_flags = frag->flags;
2408 int flags, distance, i, found_keyframe = 0, err;
2409
2410 for (i = 0; i < c->fc->nb_streams; i++) {
2411 if (c->fc->streams[i]->id == frag->track_id) {
2412 st = c->fc->streams[i];
2413 break;
2414 }
2415 }
2416 if (!st) {
2417 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2418 return AVERROR_INVALIDDATA;
2419 }
2420 sc = st->priv_data;
2421 if (sc->pseudo_stream_id+1 != frag->stsd_id)
2422 return 0;
2423 avio_r8(pb); /* version */
2424 flags = avio_rb24(pb);
2425 entries = avio_rb32(pb);
2426 av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2427
2428 /* Always assume the presence of composition time offsets.
2429 * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2430 * 1) in the initial movie, there are no samples.
2431 * 2) in the first movie fragment, there is only one sample without composition time offset.
2432 * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2433 if (!sc->ctts_count && sc->sample_count)
2434 {
2435 /* Complement ctts table if moov atom doesn't have ctts atom. */
2436 ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
2437 if (!ctts_data)
2438 return AVERROR(ENOMEM);
2439 sc->ctts_data = ctts_data;
2440 sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2441 sc->ctts_data[sc->ctts_count].duration = 0;
2442 sc->ctts_count++;
2443 }
2444 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2445 return AVERROR_INVALIDDATA;
2446 if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
2447 sizeof(*sc->ctts_data))) < 0) {
2448 sc->ctts_count = 0;
2449 return err;
2450 }
2451 if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2452 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2453 dts = sc->track_end - sc->time_offset;
2454 offset = frag->base_data_offset + data_offset;
2455 distance = 0;
2456 av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2457 for (i = 0; i < entries && !pb->eof_reached; i++) {
2458 unsigned sample_size = frag->size;
2459 int sample_flags = i ? frag->flags : first_sample_flags;
2460 unsigned sample_duration = frag->duration;
2461 int keyframe = 0;
2462
2463 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2464 if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2465 if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2466 sc->ctts_data[sc->ctts_count].count = 1;
2467 sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2468 avio_rb32(pb) : 0;
2469 sc->ctts_count++;
2470 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2471 keyframe = 1;
2472 else if (!found_keyframe)
2473 keyframe = found_keyframe =
2474 !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2475 MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2476 if (keyframe)
2477 distance = 0;
2478 av_add_index_entry(st, offset, dts, sample_size, distance,
2479 keyframe ? AVINDEX_KEYFRAME : 0);
2480 av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2481 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2482 offset, dts, sample_size, distance, keyframe);
2483 distance++;
2484 dts += sample_duration;
2485 offset += sample_size;
2486 sc->data_size += sample_size;
2487 }
2488
2489 if (pb->eof_reached)
2490 return AVERROR_EOF;
2491
2492 frag->moof_offset = offset;
2493 st->duration = sc->track_end = dts + sc->time_offset;
2494 return 0;
2495 }
2496
2497 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2498 /* like the files created with Adobe Premiere 5.0, for samples see */
2499 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2500 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2501 {
2502 int err;
2503
2504 if (atom.size < 8)
2505 return 0; /* continue */
2506 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2507 avio_skip(pb, atom.size - 4);
2508 return 0;
2509 }
2510 atom.type = avio_rl32(pb);
2511 atom.size -= 8;
2512 if (atom.type != MKTAG('m','d','a','t')) {
2513 avio_skip(pb, atom.size);
2514 return 0;
2515 }
2516 err = mov_read_mdat(c, pb, atom);
2517 return err;
2518 }
2519
2520 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2521 {
2522 #if CONFIG_ZLIB
2523 AVIOContext ctx;
2524 uint8_t *cmov_data;
2525 uint8_t *moov_data; /* uncompressed data */
2526 long cmov_len, moov_len;
2527 int ret = -1;
2528
2529 avio_rb32(pb); /* dcom atom */
2530 if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2531 return AVERROR_INVALIDDATA;
2532 if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2533 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2534 return AVERROR_INVALIDDATA;
2535 }
2536 avio_rb32(pb); /* cmvd atom */
2537 if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2538 return AVERROR_INVALIDDATA;
2539 moov_len = avio_rb32(pb); /* uncompressed size */
2540 cmov_len = atom.size - 6 * 4;
2541
2542 cmov_data = av_malloc(cmov_len);
2543 if (!cmov_data)
2544 return AVERROR(ENOMEM);
2545 moov_data = av_malloc(moov_len);
2546 if (!moov_data) {
2547 av_free(cmov_data);
2548 return AVERROR(ENOMEM);
2549 }
2550 avio_read(pb, cmov_data, cmov_len);
2551 if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2552 goto free_and_return;
2553 if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2554 goto free_and_return;
2555 atom.type = MKTAG('m','o','o','v');
2556 atom.size = moov_len;
2557 ret = mov_read_default(c, &ctx, atom);
2558 free_and_return:
2559 av_free(moov_data);
2560 av_free(cmov_data);
2561 return ret;
2562 #else
2563 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2564 return AVERROR(ENOSYS);
2565 #endif
2566 }
2567
2568 /* edit list atom */
2569 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2570 {
2571 MOVStreamContext *sc;
2572 int i, edit_count, version;
2573
2574 if (c->fc->nb_streams < 1)
2575 return 0;
2576 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2577
2578 version = avio_r8(pb); /* version */
2579 avio_rb24(pb); /* flags */
2580 edit_count = avio_rb32(pb); /* entries */
2581
2582 if ((uint64_t)edit_count*12+8 > atom.size)
2583 return AVERROR_INVALIDDATA;
2584
2585 for (i=0; i<edit_count; i++){
2586 int64_t time;
2587 int64_t duration;
2588 if (version == 1) {
2589 duration = avio_rb64(pb);
2590 time = avio_rb64(pb);
2591 } else {
2592 duration = avio_rb32(pb); /* segment duration */
2593 time = (int32_t)avio_rb32(pb); /* media time */
2594 }
2595 avio_rb32(pb); /* Media rate */
2596 if (i == 0 && time >= -1) {
2597 sc->time_offset = time != -1 ? time : -duration;
2598 }
2599 }
2600
2601 if (edit_count > 1)
2602 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2603 "a/v desync might occur, patch welcome\n");
2604
2605 av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2606 return 0;
2607 }
2608
2609 static const MOVParseTableEntry mov_default_parse_table[] = {
2610 { MKTAG('a','v','s','s'), mov_read_extradata },
2611 { MKTAG('c','h','p','l'), mov_read_chpl },
2612 { MKTAG('c','o','6','4'), mov_read_stco },
2613 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2614 { MKTAG('d','i','n','f'), mov_read_default },
2615 { MKTAG('d','r','e','f'), mov_read_dref },
2616 { MKTAG('e','d','t','s'), mov_read_default },
2617 { MKTAG('e','l','s','t'), mov_read_elst },
2618 { MKTAG('e','n','d','a'), mov_read_enda },
2619 { MKTAG('f','i','e','l'), mov_read_fiel },
2620 { MKTAG('f','t','y','p'), mov_read_ftyp },
2621 { MKTAG('g','l','b','l'), mov_read_glbl },
2622 { MKTAG('h','d','l','r'), mov_read_hdlr },
2623 { MKTAG('i','l','s','t'), mov_read_ilst },
2624 { MKTAG('j','p','2','h'), mov_read_extradata },
2625 { MKTAG('m','d','a','t'), mov_read_mdat },
2626 { MKTAG('m','d','h','d'), mov_read_mdhd },
2627 { MKTAG('m','d','i','a'), mov_read_default },
2628 { MKTAG('m','e','t','a'), mov_read_meta },
2629 { MKTAG('m','i','n','f'), mov_read_default },
2630 { MKTAG('m','o','o','f'), mov_read_moof },
2631 { MKTAG('m','o','o','v'), mov_read_moov },
2632 { MKTAG('m','v','e','x'), mov_read_default },
2633 { MKTAG('m','v','h','d'), mov_read_mvhd },
2634 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2635 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2636 { MKTAG('a','v','c','C'), mov_read_glbl },
2637 { MKTAG('p','a','s','p'), mov_read_pasp },
2638 { MKTAG('s','t','b','l'), mov_read_default },
2639 { MKTAG('s','t','c','o'), mov_read_stco },
2640 { MKTAG('s','t','p','s'), mov_read_stps },
2641 { MKTAG('s','t','r','f'), mov_read_strf },
2642 { MKTAG('s','t','s','c'), mov_read_stsc },
2643 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2644 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2645 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2646 { MKTAG('s','t','t','s'), mov_read_stts },
2647 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2648 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2649 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2650 { MKTAG('t','r','a','k'), mov_read_trak },
2651 { MKTAG('t','r','a','f'), mov_read_default },
2652 { MKTAG('t','r','e','f'), mov_read_default },
2653 { MKTAG('c','h','a','p'), mov_read_chap },
2654 { MKTAG('t','r','e','x'), mov_read_trex },
2655 { MKTAG('t','r','u','n'), mov_read_trun },
2656 { MKTAG('u','d','t','a'), mov_read_default },
2657 { MKTAG('w','a','v','e'), mov_read_wave },
2658 { MKTAG('e','s','d','s'), mov_read_esds },
2659 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2660 { MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
2661 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2662 { MKTAG('w','f','e','x'), mov_read_wfex },
2663 { MKTAG('c','m','o','v'), mov_read_cmov },
2664 { MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
2665 { MKTAG('d','v','c','1'), mov_read_dvc1 },
2666 { MKTAG('s','b','g','p'), mov_read_sbgp },
2667 { MKTAG('h','v','c','C'), mov_read_glbl },
2668 { 0, NULL }
2669 };
2670
2671 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2672 {
2673 int64_t total_size = 0;
2674 MOVAtom a;
2675 int i;
2676
2677 if (atom.size < 0)
2678 atom.size = INT64_MAX;
2679 while (total_size + 8 < atom.size && !pb->eof_reached) {
2680 int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
2681 a.size = atom.size;
2682 a.type=0;
2683 if (atom.size >= 8) {
2684 a.size = avio_rb32(pb);
2685 a.type = avio_rl32(pb);
2686 }
2687 av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
2688 a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
2689 total_size += 8;
2690 if (a.size == 1) { /* 64 bit extended size */
2691 a.size = avio_rb64(pb) - 8;
2692 total_size += 8;
2693 }
2694 if (a.size == 0) {
2695 a.size = atom.size - total_size;
2696 if (a.size <= 8)
2697 break;
2698 }
2699 a.size -= 8;
2700 if (a.size < 0)
2701 break;
2702 a.size = FFMIN(a.size, atom.size - total_size);
2703
2704 for (i = 0; mov_default_parse_table[i].type; i++)
2705 if (mov_default_parse_table[i].type == a.type) {
2706 parse = mov_default_parse_table[i].parse;
2707 break;
2708 }
2709
2710 // container is user data
2711 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
2712 atom.type == MKTAG('i','l','s','t')))
2713 parse = mov_read_udta_string;
2714
2715 if (!parse) { /* skip leaf atoms data */
2716 avio_skip(pb, a.size);
2717 } else {
2718 int64_t start_pos = avio_tell(pb);
2719 int64_t left;
2720 int err = parse(c, pb, a);
2721 if (err < 0)
2722 return err;
2723 if (c->found_moov && c->found_mdat &&
2724 ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
2725 start_pos + a.size == avio_size(pb))) {
2726 if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
2727 c->next_root_atom = start_pos + a.size;
2728 return 0;
2729 }
2730 left = a.size - avio_tell(pb) + start_pos;
2731 if (left > 0) /* skip garbage at atom end */
2732 avio_skip(pb, left);
2733 else if (left < 0) {
2734 av_log(c->fc, AV_LOG_WARNING,
2735 "overread end of atom '%.4s' by %"PRId64" bytes\n",
2736 (char*)&a.type, -left);
2737 avio_seek(pb, left, SEEK_CUR);
2738 }
2739 }
2740
2741 total_size += a.size;
2742 }
2743
2744 if (total_size < atom.size && atom.size < 0x7ffff)
2745 avio_skip(pb, atom.size - total_size);
2746
2747 return 0;
2748 }
2749
2750 static int mov_probe(AVProbeData *p)
2751 {
2752 unsigned int offset;
2753 uint32_t tag;
2754 int score = 0;
2755
2756 /* check file header */
2757 offset = 0;
2758 for (;;) {
2759 /* ignore invalid offset */
2760 if ((offset + 8) > (unsigned int)p->buf_size)
2761 return score;
2762 tag = AV_RL32(p->buf + offset + 4);
2763 switch(tag) {
2764 /* check for obvious tags */
2765 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2766 case MKTAG('m','o','o','v'):
2767 case MKTAG('m','d','a','t'):
2768 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2769 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2770 case MKTAG('f','t','y','p'):
2771 return AVPROBE_SCORE_MAX;
2772 /* those are more common words, so rate then a bit less */
2773 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2774 case MKTAG('w','i','d','e'):
2775 case MKTAG('f','r','e','e'):
2776 case MKTAG('j','u','n','k'):
2777 case MKTAG('p','i','c','t'):
2778 return AVPROBE_SCORE_MAX - 5;
2779 case MKTAG(0x82,0x82,0x7f,0x7d):
2780 case MKTAG('s','k','i','p'):
2781 case MKTAG('u','u','i','d'):
2782 case MKTAG('p','r','f','l'):
2783 offset = AV_RB32(p->buf+offset) + offset;
2784 /* if we only find those cause probedata is too small at least rate them */
2785 score = AVPROBE_SCORE_EXTENSION;
2786 break;
2787 default:
2788 /* unrecognized tag */
2789 return score;
2790 }
2791 }
2792 }
2793
2794 // must be done after parsing all trak because there's no order requirement
2795 static void mov_read_chapters(AVFormatContext *s)
2796 {
2797 MOVContext *mov = s->priv_data;
2798 AVStream *st = NULL;
2799 MOVStreamContext *sc;
2800 int64_t cur_pos;
2801 int i;
2802
2803 for (i = 0; i < s->nb_streams; i++)
2804 if (s->streams[i]->id == mov->chapter_track) {
2805 st = s->streams[i];
2806 break;
2807 }
2808 if (!st) {
2809 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2810 return;
2811 }
2812
2813 st->discard = AVDISCARD_ALL;
2814 sc = st->priv_data;
2815 cur_pos = avio_tell(sc->pb);
2816
2817 for (i = 0; i < st->nb_index_entries; i++) {
2818 AVIndexEntry *sample = &st->index_entries[i];
2819 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2820 uint8_t *title;
2821 uint16_t ch;
2822 int len, title_len;
2823
2824 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2825 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2826 goto finish;
2827 }
2828
2829 // the first two bytes are the length of the title
2830 len = avio_rb16(sc->pb);
2831 if (len > sample->size-2)
2832 continue;
2833 title_len = 2*len + 1;
2834 if (!(title = av_mallocz(title_len)))
2835 goto finish;
2836
2837 // The samples could theoretically be in any encoding if there's an encd
2838 // atom following, but in practice are only utf-8 or utf-16, distinguished
2839 // instead by the presence of a BOM
2840 if (!len) {
2841 title[0] = 0;
2842 } else {
2843 ch = avio_rb16(sc->pb);
2844 if (ch == 0xfeff)
2845 avio_get_str16be(sc->pb, len, title, title_len);
2846 else if (ch == 0xfffe)
2847 avio_get_str16le(sc->pb, len, title, title_len);
2848 else {
2849 AV_WB16(title, ch);
2850 if (len == 1 || len == 2)
2851 title[len] = 0;
2852 else
2853 avio_get_str(sc->pb, len - 2, title + 2, title_len - 2);
2854 }
2855 }
2856
2857 avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
2858 av_freep(&title);
2859 }
2860 finish:
2861 avio_seek(sc->pb, cur_pos, SEEK_SET);
2862 }
2863
2864 static int mov_read_close(AVFormatContext *s)
2865 {
2866 MOVContext *mov = s->priv_data;
2867 int i, j;
2868
2869 for (i = 0; i < s->nb_streams; i++) {
2870 AVStream *st = s->streams[i];
2871 MOVStreamContext *sc = st->priv_data;
2872
2873 av_freep(&sc->ctts_data);
2874 for (j = 0; j < sc->drefs_count; j++) {
2875 av_freep(&sc->drefs[j].path);
2876 av_freep(&sc->drefs[j].dir);
2877 }
2878 av_freep(&sc->drefs);
2879 if (sc->pb && sc->pb != s->pb)
2880 avio_close(sc->pb);
2881
2882 av_freep(&sc->chunk_offsets);
2883 av_freep(&sc->stsc_data);
2884 av_freep(&sc->sample_sizes);
2885 av_freep(&sc->keyframes);
2886 av_freep(&sc->stts_data);
2887 av_freep(&sc->stps_data);
2888 av_freep(&sc->rap_group);
2889 }
2890
2891 if (mov->dv_demux) {
2892 for (i = 0; i < mov->dv_fctx->nb_streams; i++) {
2893 av_freep(&mov->dv_fctx->streams[i]->codec);
2894 av_freep(&mov->dv_fctx->streams[i]);
2895 }
2896 av_freep(&mov->dv_fctx);
2897 av_freep(&mov->dv_demux);
2898 }
2899
2900 av_freep(&mov->trex_data);
2901
2902 return 0;
2903 }
2904
2905 static int mov_read_header(AVFormatContext *s)
2906 {
2907 MOVContext *mov = s->priv_data;
2908 AVIOContext *pb = s->pb;
2909 int err;
2910 MOVAtom atom = { AV_RL32("root") };
2911 int i;
2912
2913 mov->fc = s;
2914 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2915 if (pb->seekable)
2916 atom.size = avio_size(pb);
2917 else
2918 atom.size = INT64_MAX;
2919
2920 /* check MOV header */
2921 if ((err = mov_read_default(mov, pb, atom)) < 0) {
2922 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2923 mov_read_close(s);
2924 return err;
2925 }
2926 if (!mov->found_moov) {
2927 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2928 mov_read_close(s);
2929 return AVERROR_INVALIDDATA;
2930 }
2931 av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
2932
2933 if (pb->seekable && mov->chapter_track > 0)
2934 mov_read_chapters(s);
2935
2936 for (i = 0; i < s->nb_streams; i++) {
2937 AVStream *st = s->streams[i];
2938 MOVStreamContext *sc = st->priv_data;
2939
2940 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2941 if (st->codec->width <= 0 && st->codec->width <= 0) {
2942 st->codec->width = sc->width;
2943 st->codec->height = sc->height;
2944 }
2945 if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
2946 if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
2947 return err;
2948 }
2949 }
2950 }
2951
2952