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In mov demuxer, fix seeking to the beginning when file has edit lists.
[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 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <limits.h>
24
25 //#define DEBUG
26 //#define DEBUG_METADATA
27 //#define MOV_EXPORT_ALL_METADATA
28
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/avstring.h"
31 #include "avformat.h"
32 #include "riff.h"
33 #include "isom.h"
34 #include "libavcodec/mpeg4audio.h"
35 #include "libavcodec/mpegaudiodata.h"
36 #include "libavcodec/get_bits.h"
37
38 #if CONFIG_ZLIB
39 #include <zlib.h>
40 #endif
41
42 /*
43 * First version by Francois Revol revol@free.fr
44 * Seek function by Gael Chardon gael.dev@4now.net
45 *
46 * Features and limitations:
47 * - reads most of the QT files I have (at least the structure),
48 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
49 * - the code is quite ugly... maybe I won't do it recursive next time :-)
50 *
51 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
52 * when coding this :) (it's a writer anyway)
53 *
54 * Reference documents:
55 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
56 * Apple:
57 * http://developer.apple.com/documentation/QuickTime/QTFF/
58 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
59 * QuickTime is a trademark of Apple (AFAIK :))
60 */
61
62 #include "qtpalette.h"
63
64
65 #undef NDEBUG
66 #include <assert.h>
67
68 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
69
70 /* those functions parse an atom */
71 /* return code:
72 0: continue to parse next atom
73 <0: error occurred, exit
74 */
75 /* links atom IDs to parse functions */
76 typedef struct MOVParseTableEntry {
77 uint32_t type;
78 int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
79 } MOVParseTableEntry;
80
81 static const MOVParseTableEntry mov_default_parse_table[];
82
83 static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
84 {
85 char buf[16];
86
87 get_be16(pb); // unknown
88 snprintf(buf, sizeof(buf), "%d", get_be16(pb));
89 av_metadata_set2(&c->fc->metadata, "track", buf, 0);
90
91 get_be16(pb); // total tracks
92
93 return 0;
94 }
95
96 static const uint32_t mac_to_unicode[128] = {
97 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
98 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
99 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
100 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
101 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
102 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
103 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
104 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
105 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
106 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
107 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
108 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
109 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
110 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
111 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
112 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
113 };
114
115 static int mov_read_mac_string(MOVContext *c, ByteIOContext *pb, int len,
116 char *dst, int dstlen)
117 {
118 char *p = dst;
119 char *end = dst+dstlen-1;
120 int i;
121
122 for (i = 0; i < len; i++) {
123 uint8_t t, c = get_byte(pb);
124 if (c < 0x80 && p < end)
125 *p++ = c;
126 else
127 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
128 }
129 *p = 0;
130 return p - dst;
131 }
132
133 static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
134 {
135 #ifdef MOV_EXPORT_ALL_METADATA
136 char tmp_key[5];
137 #endif
138 char str[1024], key2[16], language[4] = {0};
139 const char *key = NULL;
140 uint16_t str_size, langcode = 0;
141 uint32_t data_type = 0;
142 int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
143
144 switch (atom.type) {
145 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
146 case MKTAG(0xa9,'a','u','t'):
147 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
148 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
149 case MKTAG( 'c','p','r','t'):
150 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
151 case MKTAG(0xa9,'c','m','t'):
152 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
153 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
154 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
155 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
156 case MKTAG(0xa9,'t','o','o'):
157 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
158 case MKTAG( 'd','e','s','c'): key = "description";break;
159 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
160 case MKTAG( 't','v','s','h'): key = "show"; break;
161 case MKTAG( 't','v','e','n'): key = "episode_id";break;
162 case MKTAG( 't','v','n','n'): key = "network"; break;
163 case MKTAG( 't','r','k','n'): key = "track";
164 parse = mov_metadata_trkn; break;
165 }
166
167 if (c->itunes_metadata && atom.size > 8) {
168 int data_size = get_be32(pb);
169 int tag = get_le32(pb);
170 if (tag == MKTAG('d','a','t','a')) {
171 data_type = get_be32(pb); // type
172 get_be32(pb); // unknown
173 str_size = data_size - 16;
174 atom.size -= 16;
175 } else return 0;
176 } else if (atom.size > 4 && key && !c->itunes_metadata) {
177 str_size = get_be16(pb); // string length
178 langcode = get_be16(pb);
179 ff_mov_lang_to_iso639(langcode, language);
180 atom.size -= 4;
181 } else
182 str_size = atom.size;
183
184 #ifdef MOV_EXPORT_ALL_METADATA
185 if (!key) {
186 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
187 key = tmp_key;
188 }
189 #endif
190
191 if (!key)
192 return 0;
193 if (atom.size < 0)
194 return -1;
195
196 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
197
198 if (parse)
199 parse(c, pb, str_size);
200 else {
201 if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
202 mov_read_mac_string(c, pb, str_size, str, sizeof(str));
203 } else {
204 get_buffer(pb, str, str_size);
205 str[str_size] = 0;
206 }
207 av_metadata_set2(&c->fc->metadata, key, str, 0);
208 if (*language && strcmp(language, "und")) {
209 snprintf(key2, sizeof(key2), "%s-%s", key, language);
210 av_metadata_set2(&c->fc->metadata, key2, str, 0);
211 }
212 }
213 #ifdef DEBUG_METADATA
214 av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
215 av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
216 key, str, (char*)&atom.type, str_size, atom.size);
217 #endif
218
219 return 0;
220 }
221
222 static int mov_read_chpl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
223 {
224 int64_t start;
225 int i, nb_chapters, str_len;
226 char str[256+1];
227
228 if ((atom.size -= 5) < 0)
229 return 0;
230
231 get_be32(pb); // version + flags
232 get_be32(pb); // ???
233 nb_chapters = get_byte(pb);
234
235 for (i = 0; i < nb_chapters; i++) {
236 if (atom.size < 9)
237 return 0;
238
239 start = get_be64(pb);
240 str_len = get_byte(pb);
241
242 if ((atom.size -= 9+str_len) < 0)
243 return 0;
244
245 get_buffer(pb, str, str_len);
246 str[str_len] = 0;
247 ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
248 }
249 return 0;
250 }
251
252 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
253 {
254 int64_t total_size = 0;
255 MOVAtom a;
256 int i;
257
258 if (atom.size < 0)
259 atom.size = INT64_MAX;
260 while (total_size + 8 < atom.size && !url_feof(pb)) {
261 int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
262 a.size = atom.size;
263 a.type=0;
264 if(atom.size >= 8) {
265 a.size = get_be32(pb);
266 a.type = get_le32(pb);
267 }
268 dprintf(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
269 a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
270 total_size += 8;
271 if (a.size == 1) { /* 64 bit extended size */
272 a.size = get_be64(pb) - 8;
273 total_size += 8;
274 }
275 if (a.size == 0) {
276 a.size = atom.size - total_size;
277 if (a.size <= 8)
278 break;
279 }
280 a.size -= 8;
281 if(a.size < 0)
282 break;
283 a.size = FFMIN(a.size, atom.size - total_size);
284
285 for (i = 0; mov_default_parse_table[i].type; i++)
286 if (mov_default_parse_table[i].type == a.type) {
287 parse = mov_default_parse_table[i].parse;
288 break;
289 }
290
291 // container is user data
292 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
293 atom.type == MKTAG('i','l','s','t')))
294 parse = mov_read_udta_string;
295
296 if (!parse) { /* skip leaf atoms data */
297 url_fskip(pb, a.size);
298 } else {
299 int64_t start_pos = url_ftell(pb);
300 int64_t left;
301 int err = parse(c, pb, a);
302 if (err < 0)
303 return err;
304 if (c->found_moov && c->found_mdat &&
305 (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
306 return 0;
307 left = a.size - url_ftell(pb) + start_pos;
308 if (left > 0) /* skip garbage at atom end */
309 url_fskip(pb, left);
310 }
311
312 total_size += a.size;
313 }
314
315 if (total_size < atom.size && atom.size < 0x7ffff)
316 url_fskip(pb, atom.size - total_size);
317
318 return 0;
319 }
320
321 static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
322 {
323 AVStream *st;
324 MOVStreamContext *sc;
325 int entries, i, j;
326
327 if (c->fc->nb_streams < 1)
328 return 0;
329 st = c->fc->streams[c->fc->nb_streams-1];
330 sc = st->priv_data;
331
332 get_be32(pb); // version + flags
333 entries = get_be32(pb);
334 if (entries >= UINT_MAX / sizeof(*sc->drefs))
335 return -1;
336 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
337 if (!sc->drefs)
338 return AVERROR(ENOMEM);
339 sc->drefs_count = entries;
340
341 for (i = 0; i < sc->drefs_count; i++) {
342 MOVDref *dref = &sc->drefs[i];
343 uint32_t size = get_be32(pb);
344 int64_t next = url_ftell(pb) + size - 4;
345
346 dref->type = get_le32(pb);
347 get_be32(pb); // version + flags
348 dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
349
350 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
351 /* macintosh alias record */
352 uint16_t volume_len, len;
353 int16_t type;
354
355 url_fskip(pb, 10);
356
357 volume_len = get_byte(pb);
358 volume_len = FFMIN(volume_len, 27);
359 get_buffer(pb, dref->volume, 27);
360 dref->volume[volume_len] = 0;
361 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
362
363 url_fskip(pb, 12);
364
365 len = get_byte(pb);
366 len = FFMIN(len, 63);
367 get_buffer(pb, dref->filename, 63);
368 dref->filename[len] = 0;
369 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
370
371 url_fskip(pb, 16);
372
373 /* read next level up_from_alias/down_to_target */
374 dref->nlvl_from = get_be16(pb);
375 dref->nlvl_to = get_be16(pb);
376 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
377 dref->nlvl_from, dref->nlvl_to);
378
379 url_fskip(pb, 16);
380
381 for (type = 0; type != -1 && url_ftell(pb) < next; ) {
382 type = get_be16(pb);
383 len = get_be16(pb);
384 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
385 if (len&1)
386 len += 1;
387 if (type == 2) { // absolute path
388 av_free(dref->path);
389 dref->path = av_mallocz(len+1);
390 if (!dref->path)
391 return AVERROR(ENOMEM);
392 get_buffer(pb, dref->path, len);
393 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
394 len -= volume_len;
395 memmove(dref->path, dref->path+volume_len, len);
396 dref->path[len] = 0;
397 }
398 for (j = 0; j < len; j++)
399 if (dref->path[j] == ':')
400 dref->path[j] = '/';
401 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
402 } else if (type == 0) { // directory name
403 av_free(dref->dir);
404 dref->dir = av_malloc(len+1);
405 if (!dref->dir)
406 return AVERROR(ENOMEM);
407 get_buffer(pb, dref->dir, len);
408 dref->dir[len] = 0;
409 for (j = 0; j < len; j++)
410 if (dref->dir[j] == ':')
411 dref->dir[j] = '/';
412 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
413 } else
414 url_fskip(pb, len);
415 }
416 }
417 url_fseek(pb, next, SEEK_SET);
418 }
419 return 0;
420 }
421
422 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
423 {
424 AVStream *st;
425 uint32_t type;
426 uint32_t ctype;
427
428 if (c->fc->nb_streams < 1) // meta before first trak
429 return 0;
430
431 st = c->fc->streams[c->fc->nb_streams-1];
432
433 get_byte(pb); /* version */
434 get_be24(pb); /* flags */
435
436 /* component type */
437 ctype = get_le32(pb);
438 type = get_le32(pb); /* component subtype */
439
440 dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
441 dprintf(c->fc, "stype= %.4s\n", (char*)&type);
442
443 if (type == MKTAG('v','i','d','e'))
444 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
445 else if(type == MKTAG('s','o','u','n'))
446 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
447 else if(type == MKTAG('m','1','a',' '))
448 st->codec->codec_id = CODEC_ID_MP2;
449 else if(type == MKTAG('s','u','b','p'))
450 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
451
452 get_be32(pb); /* component manufacture */
453 get_be32(pb); /* component flags */
454 get_be32(pb); /* component flags mask */
455
456 return 0;
457 }
458
459 int ff_mp4_read_descr_len(ByteIOContext *pb)
460 {
461 int len = 0;
462 int count = 4;
463 while (count--) {
464 int c = get_byte(pb);
465 len = (len << 7) | (c & 0x7f);
466 if (!(c & 0x80))
467 break;
468 }
469 return len;
470 }
471
472 static int mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag)
473 {
474 int len;
475 *tag = get_byte(pb);
476 len = ff_mp4_read_descr_len(pb);
477 dprintf(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
478 return len;
479 }
480
481 #define MP4ESDescrTag 0x03
482 #define MP4DecConfigDescrTag 0x04
483 #define MP4DecSpecificDescrTag 0x05
484
485 static const AVCodecTag mp4_audio_types[] = {
486 { CODEC_ID_MP3ON4, AOT_PS }, /* old mp3on4 draft */
487 { CODEC_ID_MP3ON4, AOT_L1 }, /* layer 1 */
488 { CODEC_ID_MP3ON4, AOT_L2 }, /* layer 2 */
489 { CODEC_ID_MP3ON4, AOT_L3 }, /* layer 3 */
490 { CODEC_ID_MP4ALS, AOT_ALS }, /* MPEG-4 ALS */
491 { CODEC_ID_NONE, AOT_NULL },
492 };
493
494 int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
495 {
496 AVStream *st;
497 int tag, len;
498
499 if (fc->nb_streams < 1)
500 return 0;
501 st = fc->streams[fc->nb_streams-1];
502
503 get_be32(pb); /* version + flags */
504 len = mp4_read_descr(fc, pb, &tag);
505 if (tag == MP4ESDescrTag) {
506 get_be16(pb); /* ID */
507 get_byte(pb); /* priority */
508 } else
509 get_be16(pb); /* ID */
510
511 len = mp4_read_descr(fc, pb, &tag);
512 if (tag == MP4DecConfigDescrTag) {
513 int object_type_id = get_byte(pb);
514 get_byte(pb); /* stream type */
515 get_be24(pb); /* buffer size db */
516 get_be32(pb); /* max bitrate */
517 get_be32(pb); /* avg bitrate */
518
519 st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
520 dprintf(fc, "esds object type id 0x%02x\n", object_type_id);
521 len = mp4_read_descr(fc, pb, &tag);
522 if (tag == MP4DecSpecificDescrTag) {
523 dprintf(fc, "Specific MPEG4 header len=%d\n", len);
524 if((uint64_t)len > (1<<30))
525 return -1;
526 st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
527 if (!st->codec->extradata)
528 return AVERROR(ENOMEM);
529 get_buffer(pb, st->codec->extradata, len);
530 st->codec->extradata_size = len;
531 if (st->codec->codec_id == CODEC_ID_AAC) {
532 MPEG4AudioConfig cfg;
533 ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
534 st->codec->extradata_size);
535 st->codec->channels = cfg.channels;
536 if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
537 st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
538 else if (cfg.ext_sample_rate)
539 st->codec->sample_rate = cfg.ext_sample_rate;
540 else
541 st->codec->sample_rate = cfg.sample_rate;
542 dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
543 "sample rate %d ext sample rate %d\n", st->codec->channels,
544 cfg.object_type, cfg.ext_object_type,
545 cfg.sample_rate, cfg.ext_sample_rate);
546 if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
547 cfg.object_type)))
548 st->codec->codec_id = CODEC_ID_AAC;
549 }
550 }
551 }
552 return 0;
553 }
554
555 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
556 {
557 return ff_mov_read_esds(c->fc, pb, atom);
558 }
559
560 static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
561 {
562 const int num = get_be32(pb);
563 const int den = get_be32(pb);
564 AVStream *st;
565
566 if (c->fc->nb_streams < 1)
567 return 0;
568 st = c->fc->streams[c->fc->nb_streams-1];
569
570 if (den != 0) {
571 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
572 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
573 av_log(c->fc, AV_LOG_WARNING,
574 "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
575 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
576 st->sample_aspect_ratio.num = num;
577 st->sample_aspect_ratio.den = den;
578 }
579 return 0;
580 }
581
582 /* this atom contains actual media data */
583 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
584 {
585 if(atom.size == 0) /* wrong one (MP4) */
586 return 0;
587 c->found_mdat=1;
588 return 0; /* now go for moov */
589 }
590
591 /* read major brand, minor version and compatible brands and store them as metadata */
592 static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
593 {
594 uint32_t minor_ver;
595 int comp_brand_size;
596 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
597 char* comp_brands_str;
598 uint8_t type[5] = {0};
599
600 get_buffer(pb, type, 4);
601 if (strcmp(type, "qt "))
602 c->isom = 1;
603 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
604 av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
605 minor_ver = get_be32(pb); /* minor version */
606 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
607 av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
608
609 comp_brand_size = atom.size - 8;
610 if (comp_brand_size < 0)
611 return -1;
612 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
613 if (!comp_brands_str)
614 return AVERROR(ENOMEM);
615 get_buffer(pb, comp_brands_str, comp_brand_size);
616 comp_brands_str[comp_brand_size] = 0;
617 av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
618 av_freep(&comp_brands_str);
619
620 return 0;
621 }
622
623 /* this atom should contain all header atoms */
624 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
625 {
626 if (mov_read_default(c, pb, atom) < 0)
627 return -1;
628 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
629 /* so we don't parse the whole file if over a network */
630 c->found_moov=1;
631 return 0; /* now go for mdat */
632 }
633
634 static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
635 {
636 c->fragment.moof_offset = url_ftell(pb) - 8;
637 dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
638 return mov_read_default(c, pb, atom);
639 }
640
641 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
642 {
643 AVStream *st;
644 MOVStreamContext *sc;
645 int version;
646 char language[4] = {0};
647 unsigned lang;
648
649 if (c->fc->nb_streams < 1)
650 return 0;
651 st = c->fc->streams[c->fc->nb_streams-1];
652 sc = st->priv_data;
653
654 version = get_byte(pb);
655 if (version > 1)
656 return -1; /* unsupported */
657
658 get_be24(pb); /* flags */
659 if (version == 1) {
660 get_be64(pb);
661 get_be64(pb);
662 } else {
663 get_be32(pb); /* creation time */
664 get_be32(pb); /* modification time */
665 }
666
667 sc->time_scale = get_be32(pb);
668 st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
669
670 lang = get_be16(pb); /* language */
671 if (ff_mov_lang_to_iso639(lang, language))
672 av_metadata_set2(&st->metadata, "language", language, 0);
673 get_be16(pb); /* quality */
674
675 return 0;
676 }
677
678 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
679 {
680 int version = get_byte(pb); /* version */
681 get_be24(pb); /* flags */
682
683 if (version == 1) {
684 get_be64(pb);
685 get_be64(pb);
686 } else {
687 get_be32(pb); /* creation time */
688 get_be32(pb); /* modification time */
689 }
690 c->time_scale = get_be32(pb); /* time scale */
691
692 dprintf(c->fc, "time scale = %i\n", c->time_scale);
693
694 c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
695 get_be32(pb); /* preferred scale */
696
697 get_be16(pb); /* preferred volume */
698
699 url_fskip(pb, 10); /* reserved */
700
701 url_fskip(pb, 36); /* display matrix */
702
703 get_be32(pb); /* preview time */
704 get_be32(pb); /* preview duration */
705 get_be32(pb); /* poster time */
706 get_be32(pb); /* selection time */
707 get_be32(pb); /* selection duration */
708 get_be32(pb); /* current time */
709 get_be32(pb); /* next track ID */
710
711 return 0;
712 }
713
714 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
715 {
716 AVStream *st;
717
718 if (c->fc->nb_streams < 1)
719 return 0;
720 st = c->fc->streams[c->fc->nb_streams-1];
721
722 if((uint64_t)atom.size > (1<<30))
723 return -1;
724
725 // currently SVQ3 decoder expect full STSD header - so let's fake it
726 // this should be fixed and just SMI header should be passed
727 av_free(st->codec->extradata);
728 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
729 if (!st->codec->extradata)
730 return AVERROR(ENOMEM);
731 st->codec->extradata_size = 0x5a + atom.size;
732 memcpy(st->codec->extradata, "SVQ3", 4); // fake
733 get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
734 dprintf(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
735 return 0;
736 }
737
738 static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
739 {
740 AVStream *st;
741 int little_endian;
742
743 if (c->fc->nb_streams < 1)
744 return 0;
745 st = c->fc->streams[c->fc->nb_streams-1];
746
747 little_endian = get_be16(pb);
748 dprintf(c->fc, "enda %d\n", little_endian);
749 if (little_endian == 1) {
750 switch (st->codec->codec_id) {
751 case CODEC_ID_PCM_S24BE:
752 st->codec->codec_id = CODEC_ID_PCM_S24LE;
753 break;
754 case CODEC_ID_PCM_S32BE:
755 st->codec->codec_id = CODEC_ID_PCM_S32LE;
756 break;
757 case CODEC_ID_PCM_F32BE:
758 st->codec->codec_id = CODEC_ID_PCM_F32LE;
759 break;
760 case CODEC_ID_PCM_F64BE:
761 st->codec->codec_id = CODEC_ID_PCM_F64LE;
762 break;
763 default:
764 break;
765 }
766 }
767 return 0;
768 }
769
770 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
771 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
772 {
773 AVStream *st;
774 uint64_t size;
775 uint8_t *buf;
776
777 if (c->fc->nb_streams < 1) // will happen with jp2 files
778 return 0;
779 st= c->fc->streams[c->fc->nb_streams-1];
780 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
781 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
782 return -1;
783 buf= av_realloc(st->codec->extradata, size);
784 if(!buf)
785 return -1;
786 st->codec->extradata= buf;
787 buf+= st->codec->extradata_size;
788 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
789 AV_WB32( buf , atom.size + 8);
790 AV_WL32( buf + 4, atom.type);
791 get_buffer(pb, buf + 8, atom.size);
792 return 0;
793 }
794
795 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
796 {
797 AVStream *st;
798
799 if (c->fc->nb_streams < 1)
800 return 0;
801 st = c->fc->streams[c->fc->nb_streams-1];
802
803 if((uint64_t)atom.size > (1<<30))
804 return -1;
805
806 if (st->codec->codec_id == CODEC_ID_QDM2) {
807 // pass all frma atom to codec, needed at least for QDM2
808 av_free(st->codec->extradata);
809 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
810 if (!st->codec->extradata)
811 return AVERROR(ENOMEM);
812 st->codec->extradata_size = atom.size;
813 get_buffer(pb, st->codec->extradata, atom.size);
814 } else if (atom.size > 8) { /* to read frma, esds atoms */
815 if (mov_read_default(c, pb, atom) < 0)
816 return -1;
817 } else
818 url_fskip(pb, atom.size);
819 return 0;
820 }
821
822 /**
823 * This function reads atom content and puts data in extradata without tag
824 * nor size unlike mov_read_extradata.
825 */
826 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
827 {
828 AVStream *st;
829
830 if (c->fc->nb_streams < 1)
831 return 0;
832 st = c->fc->streams[c->fc->nb_streams-1];
833
834 if((uint64_t)atom.size > (1<<30))
835 return -1;
836
837 av_free(st->codec->extradata);
838 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
839 if (!st->codec->extradata)
840 return AVERROR(ENOMEM);
841 st->codec->extradata_size = atom.size;
842 get_buffer(pb, st->codec->extradata, atom.size);
843 return 0;
844 }
845
846 /**
847 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
848 * but can have extradata appended at the end after the 40 bytes belonging
849 * to the struct.
850 */
851 static int mov_read_strf(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
852 {
853 AVStream *st;
854
855 if (c->fc->nb_streams < 1)
856 return 0;
857 if (atom.size <= 40)
858 return 0;
859 st = c->fc->streams[c->fc->nb_streams-1];
860
861 if((uint64_t)atom.size > (1<<30))
862 return -1;
863
864 av_free(st->codec->extradata);
865 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
866 if (!st->codec->extradata)
867 return AVERROR(ENOMEM);
868 st->codec->extradata_size = atom.size - 40;
869 url_fskip(pb, 40);
870 get_buffer(pb, st->codec->extradata, atom.size - 40);
871 return 0;
872 }
873
874 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
875 {
876 AVStream *st;
877 MOVStreamContext *sc;
878 unsigned int i, entries;
879
880 if (c->fc->nb_streams < 1)
881 return 0;
882 st = c->fc->streams[c->fc->nb_streams-1];
883 sc = st->priv_data;
884
885 get_byte(pb); /* version */
886 get_be24(pb); /* flags */
887
888 entries = get_be32(pb);
889
890 if(entries >= UINT_MAX/sizeof(int64_t))
891 return -1;
892
893 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
894 if (!sc->chunk_offsets)
895 return AVERROR(ENOMEM);
896 sc->chunk_count = entries;
897
898 if (atom.type == MKTAG('s','t','c','o'))
899 for(i=0; i<entries; i++)
900 sc->chunk_offsets[i] = get_be32(pb);
901 else if (atom.type == MKTAG('c','o','6','4'))
902 for(i=0; i<entries; i++)
903 sc->chunk_offsets[i] = get_be64(pb);
904 else
905 return -1;
906
907 return 0;
908 }
909
910 /**
911 * Compute codec id for 'lpcm' tag.
912 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
913 */
914 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
915 {
916 if (flags & 1) { // floating point
917 if (flags & 2) { // big endian
918 if (bps == 32) return CODEC_ID_PCM_F32BE;
919 else if (bps == 64) return CODEC_ID_PCM_F64BE;
920 } else {
921 if (bps == 32) return CODEC_ID_PCM_F32LE;
922 else if (bps == 64) return CODEC_ID_PCM_F64LE;
923 }
924 } else {
925 if (flags & 2) {
926 if (bps == 8)
927 // signed integer
928 if (flags & 4) return CODEC_ID_PCM_S8;
929 else return CODEC_ID_PCM_U8;
930 else if (bps == 16) return CODEC_ID_PCM_S16BE;
931 else if (bps == 24) return CODEC_ID_PCM_S24BE;
932 else if (bps == 32) return CODEC_ID_PCM_S32BE;
933 } else {
934 if (bps == 8)
935 if (flags & 4) return CODEC_ID_PCM_S8;
936 else return CODEC_ID_PCM_U8;
937 else if (bps == 16) return CODEC_ID_PCM_S16LE;
938 else if (bps == 24) return CODEC_ID_PCM_S24LE;
939 else if (bps == 32) return CODEC_ID_PCM_S32LE;
940 }
941 }
942 return CODEC_ID_NONE;
943 }
944
945 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
946 {
947 AVStream *st;
948 MOVStreamContext *sc;
949 int j, entries, pseudo_stream_id;
950
951 if (c->fc->nb_streams < 1)
952 return 0;
953 st = c->fc->streams[c->fc->nb_streams-1];
954 sc = st->priv_data;
955
956 get_byte(pb); /* version */
957 get_be24(pb); /* flags */
958
959 entries = get_be32(pb);
960
961 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
962 //Parsing Sample description table
963 enum CodecID id;
964 int dref_id = 1;
965 MOVAtom a = { AV_RL32("stsd") };
966 int64_t start_pos = url_ftell(pb);
967 int size = get_be32(pb); /* size */
968 uint32_t format = get_le32(pb); /* data format */
969
970 if (size >= 16) {
971 get_be32(pb); /* reserved */
972 get_be16(pb); /* reserved */
973 dref_id = get_be16(pb);
974 }
975
976 if (st->codec->codec_tag &&
977 st->codec->codec_tag != format &&
978 (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
979 : st->codec->codec_tag != MKTAG('j','p','e','g'))
980 ){
981 /* Multiple fourcc, we skip JPEG. This is not correct, we should
982 * export it as a separate AVStream but this needs a few changes
983 * in the MOV demuxer, patch welcome. */
984 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
985 url_fskip(pb, size - (url_ftell(pb) - start_pos));
986 continue;
987 }
988 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
989 sc->dref_id= dref_id;
990
991 st->codec->codec_tag = format;
992 id = ff_codec_get_id(codec_movaudio_tags, format);
993 if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
994 id = ff_codec_get_id(ff_codec_wav_tags, bswap_32(format)&0xFFFF);
995
996 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
997 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
998 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
999 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
1000 id = ff_codec_get_id(codec_movvideo_tags, format);
1001 if (id <= 0)
1002 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1003 if (id > 0)
1004 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1005 else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
1006 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1007 if(id > 0)
1008 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1009 }
1010 }
1011
1012 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
1013 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1014 (format >> 24) & 0xff, st->codec->codec_type);
1015
1016 if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1017 unsigned int color_depth, len;
1018 int color_greyscale;
1019
1020 st->codec->codec_id = id;
1021 get_be16(pb); /* version */
1022 get_be16(pb); /* revision level */
1023 get_be32(pb); /* vendor */
1024 get_be32(pb); /* temporal quality */
1025 get_be32(pb); /* spatial quality */
1026
1027 st->codec->width = get_be16(pb); /* width */
1028 st->codec->height = get_be16(pb); /* height */
1029
1030 get_be32(pb); /* horiz resolution */
1031 get_be32(pb); /* vert resolution */
1032 get_be32(pb); /* data size, always 0 */
1033 get_be16(pb); /* frames per samples */
1034
1035 len = get_byte(pb); /* codec name, pascal string */
1036 if (len > 31)
1037 len = 31;
1038 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1039 if (len < 31)
1040 url_fskip(pb, 31 - len);
1041 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1042 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1043 st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1044
1045 st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
1046 st->codec->color_table_id = get_be16(pb); /* colortable id */
1047 dprintf(c->fc, "depth %d, ctab id %d\n",
1048 st->codec->bits_per_coded_sample, st->codec->color_table_id);
1049 /* figure out the palette situation */
1050 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1051 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1052
1053 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1054 if ((color_depth == 2) || (color_depth == 4) ||
1055 (color_depth == 8)) {
1056 /* for palette traversal */
1057 unsigned int color_start, color_count, color_end;
1058 unsigned char r, g, b;
1059
1060 st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1061 if (color_greyscale) {
1062 int color_index, color_dec;
1063 /* compute the greyscale palette */
1064 st->codec->bits_per_coded_sample = color_depth;
1065 color_count = 1 << color_depth;
1066 color_index = 255;
1067 color_dec = 256 / (color_count - 1);
1068 for (j = 0; j < color_count; j++) {
1069 r = g = b = color_index;
1070 st->codec->palctrl->palette[j] =
1071 (r << 16) | (g << 8) | (b);
1072 color_index -= color_dec;
1073 if (color_index < 0)
1074 color_index = 0;
1075 }
1076 } else if (st->codec->color_table_id) {
1077 const uint8_t *color_table;
1078 /* if flag bit 3 is set, use the default palette */
1079 color_count = 1 << color_depth;
1080 if (color_depth == 2)
1081 color_table = ff_qt_default_palette_4;
1082 else if (color_depth == 4)
1083 color_table = ff_qt_default_palette_16;
1084 else
1085 color_table = ff_qt_default_palette_256;
1086
1087 for (j = 0; j < color_count; j++) {
1088 r = color_table[j * 3 + 0];
1089 g = color_table[j * 3 + 1];
1090 b = color_table[j * 3 + 2];
1091 st->codec->palctrl->palette[j] =
1092 (r << 16) | (g << 8) | (b);
1093 }
1094 } else {
1095 /* load the palette from the file */
1096 color_start = get_be32(pb);
1097 color_count = get_be16(pb);
1098 color_end = get_be16(pb);
1099 if ((color_start <= 255) &&
1100 (color_end <= 255)) {
1101 for (j = color_start; j <= color_end; j++) {
1102 /* each R, G, or B component is 16 bits;
1103 * only use the top 8 bits; skip alpha bytes
1104 * up front */
1105 get_byte(pb);
1106 get_byte(pb);
1107 r = get_byte(pb);
1108 get_byte(pb);
1109 g = get_byte(pb);
1110 get_byte(pb);
1111 b = get_byte(pb);
1112 get_byte(pb);
1113 st->codec->palctrl->palette[j] =
1114 (r << 16) | (g << 8) | (b);
1115 }
1116 }
1117 }
1118 st->codec->palctrl->palette_changed = 1;
1119 }
1120 } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1121 int bits_per_sample, flags;
1122 uint16_t version = get_be16(pb);
1123
1124 st->codec->codec_id = id;
1125 get_be16(pb); /* revision level */
1126 get_be32(pb); /* vendor */
1127
1128 st->codec->channels = get_be16(pb); /* channel count */
1129 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
1130 st->codec->bits_per_coded_sample = get_be16(pb); /* sample size */
1131
1132 sc->audio_cid = get_be16(pb);
1133 get_be16(pb); /* packet size = 0 */
1134
1135 st->codec->sample_rate = ((get_be32(pb) >> 16));
1136
1137 //Read QT version 1 fields. In version 0 these do not exist.
1138 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
1139 if(!c->isom) {
1140 if(version==1) {
1141 sc->samples_per_frame = get_be32(pb);
1142 get_be32(pb); /* bytes per packet */
1143 sc->bytes_per_frame = get_be32(pb);
1144 get_be32(pb); /* bytes per sample */
1145 } else if(version==2) {
1146 get_be32(pb); /* sizeof struct only */
1147 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
1148 st->codec->channels = get_be32(pb);
1149 get_be32(pb); /* always 0x7F000000 */
1150 st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
1151 flags = get_be32(pb); /* lpcm format specific flag */
1152 sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
1153 sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1154 if (format == MKTAG('l','p','c','m'))
1155 st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1156 }
1157 }
1158
1159 switch (st->codec->codec_id) {
1160 case CODEC_ID_PCM_S8:
1161 case CODEC_ID_PCM_U8:
1162 if (st->codec->bits_per_coded_sample == 16)
1163 st->codec->codec_id = CODEC_ID_PCM_S16BE;
1164 break;
1165 case CODEC_ID_PCM_S16LE:
1166 case CODEC_ID_PCM_S16BE:
1167 if (st->codec->bits_per_coded_sample == 8)
1168 st->codec->codec_id = CODEC_ID_PCM_S8;
1169 else if (st->codec->bits_per_coded_sample == 24)
1170 st->codec->codec_id =
1171 st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1172 CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1173 break;
1174 /* set values for old format before stsd version 1 appeared */
1175 case CODEC_ID_MACE3:
1176 sc->samples_per_frame = 6;
1177 sc->bytes_per_frame = 2*st->codec->channels;
1178 break;
1179 case CODEC_ID_MACE6:
1180 sc->samples_per_frame = 6;
1181 sc->bytes_per_frame = 1*st->codec->channels;
1182 break;
1183 case CODEC_ID_ADPCM_IMA_QT:
1184 sc->samples_per_frame = 64;
1185 sc->bytes_per_frame = 34*st->codec->channels;
1186 break;
1187 case CODEC_ID_GSM:
1188 sc->samples_per_frame = 160;
1189 sc->bytes_per_frame = 33;
1190 break;
1191 default:
1192 break;
1193 }
1194
1195 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1196 if (bits_per_sample) {
1197 st->codec->bits_per_coded_sample = bits_per_sample;
1198 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1199 }
1200 } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1201 // ttxt stsd contains display flags, justification, background
1202 // color, fonts, and default styles, so fake an atom to read it
1203 MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1204 if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1205 mov_read_glbl(c, pb, fake_atom);
1206 st->codec->codec_id= id;
1207 st->codec->width = sc->width;
1208 st->codec->height = sc->height;
1209 } else {
1210 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1211 url_fskip(pb, size - (url_ftell(pb) - start_pos));
1212 }
1213 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1214 a.size = size - (url_ftell(pb) - start_pos);
1215 if (a.size > 8) {
1216 if (mov_read_default(c, pb, a) < 0)
1217 return -1;
1218 } else if (a.size > 0)
1219 url_fskip(pb, a.size);
1220 }
1221
1222 if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1223 st->codec->sample_rate= sc->time_scale;
1224
1225 /* special codec parameters handling */
1226 switch (st->codec->codec_id) {
1227 #if CONFIG_DV_DEMUXER
1228 case CODEC_ID_DVAUDIO:
1229 c->dv_fctx = avformat_alloc_context();
1230 c->dv_demux = dv_init_demux(c->dv_fctx);
1231 if (!c->dv_demux) {
1232 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1233 return -1;
1234 }
1235 sc->dv_audio_container = 1;
1236 st->codec->codec_id = CODEC_ID_PCM_S16LE;
1237 break;
1238 #endif
1239 /* no ifdef since parameters are always those */
1240 case CODEC_ID_QCELP:
1241 // force sample rate for qcelp when not stored in mov
1242 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1243 st->codec->sample_rate = 8000;
1244 st->codec->frame_size= 160;
1245 st->codec->channels= 1; /* really needed */
1246 break;
1247 case CODEC_ID_AMR_NB:
1248 case CODEC_ID_AMR_WB:
1249 st->codec->frame_size= sc->samples_per_frame;
1250 st->codec->channels= 1; /* really needed */
1251 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1252 if (st->codec->codec_id == CODEC_ID_AMR_NB)
1253 st->codec->sample_rate = 8000;
1254 else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1255 st->codec->sample_rate = 16000;
1256 break;
1257 case CODEC_ID_MP2:
1258 case CODEC_ID_MP3:
1259 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1260 st->need_parsing = AVSTREAM_PARSE_FULL;
1261 break;
1262 case CODEC_ID_GSM:
1263 case CODEC_ID_ADPCM_MS:
1264 case CODEC_ID_ADPCM_IMA_WAV:
1265 st->codec->block_align = sc->bytes_per_frame;
1266 break;
1267 case CODEC_ID_ALAC:
1268 if (st->codec->extradata_size == 36) {
1269 st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1270 st->codec->channels = AV_RB8 (st->codec->extradata+21);
1271 }
1272 break;
1273 default:
1274 break;
1275 }
1276
1277 return 0;
1278 }
1279
1280 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1281 {
1282 AVStream *st;
1283 MOVStreamContext *sc;
1284 unsigned int i, entries;
1285
1286 if (c->fc->nb_streams < 1)
1287 return 0;
1288 st = c->fc->streams[c->fc->nb_streams-1];
1289 sc = st->priv_data;
1290
1291 get_byte(pb); /* version */
1292 get_be24(pb); /* flags */
1293
1294 entries = get_be32(pb);
1295
1296 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1297
1298 if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1299 return -1;
1300 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1301 if (!sc->stsc_data)
1302 return AVERROR(ENOMEM);
1303 sc->stsc_count = entries;
1304
1305 for(i=0; i<entries; i++) {
1306 sc->stsc_data[i].first = get_be32(pb);
1307 sc->stsc_data[i].count = get_be32(pb);
1308 sc->stsc_data[i].id = get_be32(pb);
1309 }
1310 return 0;
1311 }
1312
1313 static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1314 {
1315 AVStream *st;
1316 MOVStreamContext *sc;
1317 unsigned i, entries;
1318
1319 if (c->fc->nb_streams < 1)
1320 return 0;
1321 st = c->fc->streams[c->fc->nb_streams-1];
1322 sc = st->priv_data;
1323
1324 get_be32(pb); // version + flags
1325
1326 entries = get_be32(pb);
1327 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1328 return -1;
1329 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1330 if (!sc->stps_data)
1331 return AVERROR(ENOMEM);
1332 sc->stps_count = entries;
1333
1334 for (i = 0; i < entries; i++) {
1335 sc->stps_data[i] = get_be32(pb);
1336 //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1337 }
1338
1339 return 0;
1340 }
1341
1342 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1343 {
1344 AVStream *st;
1345 MOVStreamContext *sc;
1346 unsigned int i, entries;
1347
1348 if (c->fc->nb_streams < 1)
1349 return 0;
1350 st = c->fc->streams[c->fc->nb_streams-1];
1351 sc = st->priv_data;
1352
1353 get_byte(pb); /* version */
1354 get_be24(pb); /* flags */
1355
1356 entries = get_be32(pb);
1357
1358 dprintf(c->fc, "keyframe_count = %d\n", entries);
1359
1360 if(entries >= UINT_MAX / sizeof(int))
1361 return -1;
1362 sc->keyframes = av_malloc(entries * sizeof(int));
1363 if (!sc->keyframes)
1364 return AVERROR(ENOMEM);
1365 sc->keyframe_count = entries;
1366
1367 for(i=0; i<entries; i++) {
1368 sc->keyframes[i] = get_be32(pb);
1369 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1370 }
1371 return 0;
1372 }
1373
1374 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1375 {
1376 AVStream *st;
1377 MOVStreamContext *sc;
1378 unsigned int i, entries, sample_size, field_size, num_bytes;
1379 GetBitContext gb;
1380 unsigned char* buf;
1381
1382 if (c->fc->nb_streams < 1)
1383 return 0;
1384 st = c->fc->streams[c->fc->nb_streams-1];
1385 sc = st->priv_data;
1386
1387 get_byte(pb); /* version */
1388 get_be24(pb); /* flags */
1389
1390 if (atom.type == MKTAG('s','t','s','z')) {
1391 sample_size = get_be32(pb);
1392 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1393 sc->sample_size = sample_size;
1394 field_size = 32;
1395 } else {
1396 sample_size = 0;
1397 get_be24(pb); /* reserved */
1398 field_size = get_byte(pb);
1399 }
1400 entries = get_be32(pb);
1401
1402 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1403
1404 sc->sample_count = entries;
1405 if (sample_size)
1406 return 0;
1407
1408 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1409 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1410 return -1;
1411 }
1412
1413 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1414 return -1;
1415 sc->sample_sizes = av_malloc(entries * sizeof(int));
1416 if (!sc->sample_sizes)
1417 return AVERROR(ENOMEM);
1418
1419 num_bytes = (entries*field_size+4)>>3;
1420
1421 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1422 if (!buf) {
1423 av_freep(&sc->sample_sizes);
1424 return AVERROR(ENOMEM);
1425 }
1426
1427 if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1428 av_freep(&sc->sample_sizes);
1429 av_free(buf);
1430 return -1;
1431 }
1432
1433 init_get_bits(&gb, buf, 8*num_bytes);
1434
1435 for(i=0; i<entries; i++)
1436 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1437
1438 av_free(buf);
1439 return 0;
1440 }
1441
1442 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1443 {
1444 AVStream *st;
1445 MOVStreamContext *sc;
1446 unsigned int i, entries;
1447 int64_t duration=0;
1448 int64_t total_sample_count=0;
1449
1450 if (c->fc->nb_streams < 1)
1451 return 0;
1452 st = c->fc->streams[c->fc->nb_streams-1];
1453 sc = st->priv_data;
1454
1455 get_byte(pb); /* version */
1456 get_be24(pb); /* flags */
1457 entries = get_be32(pb);
1458
1459 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1460
1461 if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1462 return -1;
1463 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1464 if (!sc->stts_data)
1465 return AVERROR(ENOMEM);
1466 sc->stts_count = entries;
1467
1468 for(i=0; i<entries; i++) {
1469 int sample_duration;
1470 int sample_count;
1471
1472 sample_count=get_be32(pb);
1473 sample_duration = get_be32(pb);
1474 sc->stts_data[i].count= sample_count;
1475 sc->stts_data[i].duration= sample_duration;
1476
1477 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1478
1479 duration+=(int64_t)sample_duration*sample_count;
1480 total_sample_count+=sample_count;
1481 }
1482
1483 st->nb_frames= total_sample_count;
1484 if(duration)
1485 st->duration= duration;
1486 return 0;
1487 }
1488
1489 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1490 {
1491 AVStream *st;
1492 MOVStreamContext *sc;
1493 unsigned int i, entries;
1494
1495 if (c->fc->nb_streams < 1)
1496 return 0;
1497 st = c->fc->streams[c->fc->nb_streams-1];
1498 sc = st->priv_data;
1499
1500 get_byte(pb); /* version */
1501 get_be24(pb); /* flags */
1502 entries = get_be32(pb);
1503
1504 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1505
1506 if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1507 return -1;
1508 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1509 if (!sc->ctts_data)
1510 return AVERROR(ENOMEM);
1511 sc->ctts_count = entries;
1512
1513 for(i=0; i<entries; i++) {
1514 int count =get_be32(pb);
1515 int duration =get_be32(pb);
1516
1517 sc->ctts_data[i].count = count;
1518 sc->ctts_data[i].duration= duration;
1519 if (duration < 0)
1520 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1521 }
1522
1523 dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1524
1525 return 0;
1526 }
1527
1528 static void mov_build_index(MOVContext *mov, AVStream *st)
1529 {
1530 MOVStreamContext *sc = st->priv_data;
1531 int64_t current_offset;
1532 int64_t current_dts = 0;
1533 unsigned int stts_index = 0;
1534 unsigned int stsc_index = 0;
1535 unsigned int stss_index = 0;
1536 unsigned int stps_index = 0;
1537 unsigned int i, j;
1538 uint64_t stream_size = 0;
1539
1540 /* adjust first dts according to edit list */
1541 if (sc->time_offset) {
1542 int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1543 current_dts = -rescaled;
1544 if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1545 /* more than 16 frames delay, dts are likely wrong
1546 this happens with files created by iMovie */
1547 sc->wrong_dts = 1;
1548 st->codec->has_b_frames = 1;
1549 }
1550 }
1551
1552 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1553 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1554 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1555 unsigned int current_sample = 0;
1556 unsigned int stts_sample = 0;
1557 unsigned int sample_size;
1558 unsigned int distance = 0;
1559 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1560
1561 current_dts -= sc->dts_shift;
1562
1563 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1564 return;
1565 st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1566 if (!st->index_entries)
1567 return;
1568 st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1569
1570 for (i = 0; i < sc->chunk_count; i++) {
1571 current_offset = sc->chunk_offsets[i];
1572 if (stsc_index + 1 < sc->stsc_count &&
1573 i + 1 == sc->stsc_data[stsc_index + 1].first)
1574 stsc_index++;
1575 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1576 int keyframe = 0;
1577 if (current_sample >= sc->sample_count) {
1578 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1579 return;
1580 }
1581
1582 if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1583 keyframe = 1;
1584 if (stss_index + 1 < sc->keyframe_count)
1585 stss_index++;
1586 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1587 keyframe = 1;
1588 if (stps_index + 1 < sc->stps_count)
1589 stps_index++;
1590 }
1591 if (keyframe)
1592 distance = 0;
1593 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1594 if(sc->pseudo_stream_id == -1 ||
1595 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1596 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1597 e->pos = current_offset;
1598 e->timestamp = current_dts;
1599 e->size = sample_size;
1600 e->min_distance = distance;
1601 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1602 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1603 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1604 current_offset, current_dts, sample_size, distance, keyframe);
1605 }
1606
1607 current_offset += sample_size;
1608 stream_size += sample_size;
1609 current_dts += sc->stts_data[stts_index].duration;
1610 distance++;
1611 stts_sample++;
1612 current_sample++;
1613 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1614 stts_sample = 0;
1615 stts_index++;
1616 }
1617 }
1618 }
1619 if (st->duration > 0)
1620 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1621 } else {
1622 unsigned chunk_samples, total = 0;
1623
1624 // compute total chunk count
1625 for (i = 0; i < sc->stsc_count; i++) {
1626 unsigned count, chunk_count;
1627
1628 chunk_samples = sc->stsc_data[i].count;
1629 if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1630 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1631 return;
1632 }
1633
1634 if (sc->samples_per_frame >= 160) { // gsm
1635 count = chunk_samples / sc->samples_per_frame;
1636 } else if (sc->samples_per_frame > 1) {
1637 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1638 count = (chunk_samples+samples-1) / samples;
1639 } else {
1640 count = (chunk_samples+1023) / 1024;
1641 }
1642
1643 if (i < sc->stsc_count - 1)
1644 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1645 else
1646 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1647 total += chunk_count * count;
1648 }
1649
1650 dprintf(mov->fc, "chunk count %d\n", total);
1651 if (total >= UINT_MAX / sizeof(*st->index_entries))
1652 return;
1653 st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1654 if (!st->index_entries)
1655 return;
1656 st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1657
1658 // populate index
1659 for (i = 0; i < sc->chunk_count; i++) {
1660 current_offset = sc->chunk_offsets[i];
1661 if (stsc_index + 1 < sc->stsc_count &&
1662 i + 1 == sc->stsc_data[stsc_index + 1].first)
1663 stsc_index++;
1664 chunk_samples = sc->stsc_data[stsc_index].count;
1665
1666 while (chunk_samples > 0) {
1667 AVIndexEntry *e;
1668 unsigned size, samples;
1669
1670 if (sc->samples_per_frame >= 160) { // gsm
1671 samples = sc->samples_per_frame;
1672 size = sc->bytes_per_frame;
1673 } else {
1674 if (sc->samples_per_frame > 1) {
1675 samples = FFMIN((1024 / sc->samples_per_frame)*
1676 sc->samples_per_frame, chunk_samples);
1677 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1678 } else {
1679 samples = FFMIN(1024, chunk_samples);
1680 size = samples * sc->sample_size;
1681 }
1682 }
1683
1684 if (st->nb_index_entries >= total) {
1685 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1686 return;
1687 }
1688 e = &st->index_entries[st->nb_index_entries++];
1689 e->pos = current_offset;
1690 e->timestamp = current_dts;
1691 e->size = size;
1692 e->min_distance = 0;
1693 e->flags = AVINDEX_KEYFRAME;
1694 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1695 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1696 size, samples);
1697
1698 current_offset += size;
1699 current_dts += samples;
1700 chunk_samples -= samples;
1701 }
1702 }
1703 }
1704 }
1705
1706 static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
1707 {
1708 /* try relative path, we do not try the absolute because it can leak information about our
1709 system to an attacker */
1710 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1711 char filename[1024];
1712 char *src_path;
1713 int i, l;
1714
1715 /* find a source dir */
1716 src_path = strrchr(src, '/');
1717 if (src_path)
1718 src_path++;
1719 else
1720 src_path = src;
1721
1722 /* find a next level down to target */
1723 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1724 if (ref->path[l] == '/') {
1725 if (i == ref->nlvl_to - 1)
1726 break;
1727 else
1728 i++;
1729 }
1730
1731 /* compose filename if next level down to target was found */
1732 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
1733 memcpy(filename, src, src_path - src);
1734 filename[src_path - src] = 0;
1735
1736 for (i = 1; i < ref->nlvl_from; i++)
1737 av_strlcat(filename, "../", 1024);
1738
1739 av_strlcat(filename, ref->path + l + 1, 1024);
1740
1741 if (!url_fopen(pb, filename, URL_RDONLY))
1742 return 0;
1743 }
1744 }
1745
1746 return AVERROR(ENOENT);
1747 };
1748
1749 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1750 {
1751 AVStream *st;
1752 MOVStreamContext *sc;
1753 int ret;
1754
1755 st = av_new_stream(c->fc, c->fc->nb_streams);
1756 if (!st) return AVERROR(ENOMEM);
1757 sc = av_mallocz(sizeof(MOVStreamContext));
1758 if (!sc) return AVERROR(ENOMEM);
1759
1760 st->priv_data = sc;
1761 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1762 sc->ffindex = st->index;
1763
1764 if ((ret = mov_read_default(c, pb, atom)) < 0)
1765 return ret;
1766
1767 /* sanity checks */
1768 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1769 (!sc->sample_size && !sc->sample_count))) {
1770 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1771 st->index);
1772 return 0;
1773 }
1774
1775 if (!sc->time_scale) {
1776 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1777 sc->time_scale = c->time_scale;
1778 if (!sc->time_scale)
1779 sc->time_scale = 1;
1780 }
1781
1782 av_set_pts_info(st, 64, 1, sc->time_scale);
1783
1784 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1785 !st->codec->frame_size && sc->stts_count == 1) {
1786 st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1787 st->codec->sample_rate, sc->time_scale);
1788 dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1789 }
1790
1791 mov_build_index(c, st);
1792
1793 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1794 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1795 if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1796 av_log(c->fc, AV_LOG_ERROR,
1797 "stream %d, error opening alias: path='%s', dir='%s', "
1798 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1799 st->index, dref->path, dref->dir, dref->filename,
1800 dref->volume, dref->nlvl_from, dref->nlvl_to);
1801 } else
1802 sc->pb = c->fc->pb;
1803
1804 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1805 if (!st->sample_aspect_ratio.num &&
1806 (st->codec->width != sc->width || st->codec->height != sc->height)) {
1807 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
1808 ((double)st->codec->width * sc->height), INT_MAX);
1809 }
1810
1811 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1812 sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1813 }
1814
1815 switch (st->codec->codec_id) {
1816 #if CONFIG_H261_DECODER
1817 case CODEC_ID_H261:
1818 #endif
1819 #if CONFIG_H263_DECODER
1820 case CODEC_ID_H263:
1821 #endif
1822 #if CONFIG_H264_DECODER
1823 case CODEC_ID_H264:
1824 #endif
1825 #if CONFIG_MPEG4_DECODER
1826 case CODEC_ID_MPEG4:
1827 #endif
1828 st->codec->width = 0; /* let decoder init width/height */
1829 st->codec->height= 0;
1830 break;
1831 }
1832
1833 /* Do not need those anymore. */
1834 av_freep(&sc->chunk_offsets);
1835 av_freep(&sc->stsc_data);
1836 av_freep(&sc->sample_sizes);
1837 av_freep(&sc->keyframes);
1838 av_freep(&sc->stts_data);
1839 av_freep(&sc->stps_data);
1840
1841 return 0;
1842 }
1843
1844 static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1845 {
1846 int ret;
1847 c->itunes_metadata = 1;
1848 ret = mov_read_default(c, pb, atom);
1849 c->itunes_metadata = 0;
1850 return ret;
1851 }
1852
1853 static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1854 {
1855 while (atom.size > 8) {
1856 uint32_t tag = get_le32(pb);
1857 atom.size -= 4;
1858 if (tag == MKTAG('h','d','l','r')) {
1859 url_fseek(pb, -8, SEEK_CUR);
1860 atom.size += 8;
1861 return mov_read_default(c, pb, atom);
1862 }
1863 }
1864 return 0;
1865 }
1866
1867 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1868 {
1869 int i;
1870 int width;
1871 int height;
1872 int64_t disp_transform[2];
1873 int display_matrix[3][2];
1874 AVStream *st;
1875 MOVStreamContext *sc;
1876 int version;
1877
1878 if (c->fc->nb_streams < 1)
1879 return 0;
1880 st = c->fc->streams[c->fc->nb_streams-1];
1881 sc = st->priv_data;
1882
1883 version = get_byte(pb);
1884 get_be24(pb); /* flags */
1885 /*
1886 MOV_TRACK_ENABLED 0x0001
1887 MOV_TRACK_IN_MOVIE 0x0002
1888 MOV_TRACK_IN_PREVIEW 0x0004
1889 MOV_TRACK_IN_POSTER 0x0008
1890 */
1891
1892 if (version == 1) {
1893 get_be64(pb);
1894 get_be64(pb);
1895 } else {
1896 get_be32(pb); /* creation time */
1897 get_be32(pb); /* modification time */
1898 }
1899 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1900 get_be32(pb); /* reserved */
1901
1902 /* highlevel (considering edits) duration in movie timebase */
1903 (version == 1) ? get_be64(pb) : get_be32(pb);
1904 get_be32(pb); /* reserved */
1905 get_be32(pb); /* reserved */
1906
1907 get_be16(pb); /* layer */
1908 get_be16(pb); /* alternate group */
1909 get_be16(pb); /* volume */
1910 get_be16(pb); /* reserved */
1911
1912 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1913 // they're kept in fixed point format through all calculations
1914 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1915 for (i = 0; i < 3; i++) {
1916 display_matrix[i][0] = get_be32(pb); // 16.16 fixed point
1917 display_matrix[i][1] = get_be32(pb); // 16.16 fixed point
1918 get_be32(pb); // 2.30 fixed point (not used)
1919 }
1920
1921 width = get_be32(pb); // 16.16 fixed point track width
1922 height = get_be32(pb); // 16.16 fixed point track height
1923 sc->width = width >> 16;
1924 sc->height = height >> 16;
1925
1926 // transform the display width/height according to the matrix
1927 // skip this if the display matrix is the default identity matrix
1928 // or if it is rotating the picture, ex iPhone 3GS
1929 // to keep the same scale, use [width height 1<<16]
1930 if (width && height &&
1931 ((display_matrix[0][0] != 65536 ||
1932 display_matrix[1][1] != 65536) &&
1933 !display_matrix[0][1] &&
1934 !display_matrix[1][0] &&
1935 !display_matrix[2][0] && !display_matrix[2][1])) {
1936 for (i = 0; i < 2; i++)
1937 disp_transform[i] =
1938 (int64_t) width * display_matrix[0][i] +
1939 (int64_t) height * display_matrix[1][i] +
1940 ((int64_t) display_matrix[2][i] << 16);
1941
1942 //sample aspect ratio is new width/height divided by old width/height
1943 st->sample_aspect_ratio = av_d2q(
1944 ((double) disp_transform[0] * height) /
1945 ((double) disp_transform[1] * width), INT_MAX);
1946 }
1947 return 0;
1948 }
1949
1950 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1951 {
1952 MOVFragment *frag = &c->fragment;
1953 MOVTrackExt *trex = NULL;
1954 int flags, track_id, i;
1955
1956 get_byte(pb); /* version */
1957 flags = get_be24(pb);
1958
1959 track_id = get_be32(pb);
1960 if (!track_id)
1961 return -1;
1962 frag->track_id = track_id;
1963 for (i = 0; i < c->trex_count; i++)
1964 if (c->trex_data[i].track_id == frag->track_id) {
1965 trex = &c->trex_data[i];
1966 break;
1967 }
1968 if (!trex) {
1969 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1970 return -1;
1971 }
1972
1973 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1974 else frag->base_data_offset = frag->moof_offset;
1975 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1976 else frag->stsd_id = trex->stsd_id;
1977
1978 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1979 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1980 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1981 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1982 return 0;
1983 }
1984
1985 static int mov_read_chap(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1986 {
1987 c->chapter_track = get_be32(pb);
1988 return 0;
1989 }
1990
1991 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1992 {
1993 MOVTrackExt *trex;
1994
1995 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1996 return -1;
1997 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1998 if (!trex)
1999 return AVERROR(ENOMEM);
2000 c->trex_data = trex;
2001 trex = &c->trex_data[c->trex_count++];
2002 get_byte(pb); /* version */
2003 get_be24(pb); /* flags */
2004 trex->track_id = get_be32(pb);
2005 trex->stsd_id = get_be32(pb);
2006 trex->duration = get_be32(pb);
2007 trex->size = get_be32(pb);
2008 trex->flags = get_be32(pb);
2009 return 0;
2010 }
2011
2012 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2013 {
2014 MOVFragment *frag = &c->fragment;
2015 AVStream *st = NULL;
2016 MOVStreamContext *sc;
2017 uint64_t offset;
2018 int64_t dts;
2019 int data_offset = 0;
2020 unsigned entries, first_sample_flags = frag->flags;
2021 int flags, distance, i;
2022
2023 for (i = 0; i < c->fc->nb_streams; i++) {
2024 if (c->fc->streams[i]->id == frag->track_id) {
2025 st = c->fc->streams[i];
2026 break;
2027 }
2028 }
2029 if (!st) {
2030 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2031 return -1;
2032 }
2033 sc = st->priv_data;
2034 if (sc->pseudo_stream_id+1 != frag->stsd_id)
2035 return 0;
2036 get_byte(pb); /* version */
2037 flags = get_be24(pb);
2038 entries = get_be32(pb);
2039 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
2040 if (flags & 0x001) data_offset = get_be32(pb);
2041 if (flags & 0x004) first_sample_flags = get_be32(pb);
2042 if (flags & 0x800) {
2043 MOVStts *ctts_data;
2044 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2045 return -1;
2046 ctts_data = av_realloc(sc->ctts_data,
2047 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2048 if (!ctts_data)
2049 return AVERROR(ENOMEM);
2050 sc->ctts_data = ctts_data;
2051 }
2052 dts = st->duration;
2053 offset = frag->base_data_offset + data_offset;
2054 distance = 0;
2055 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2056 for (i = 0; i < entries; i++) {
2057 unsigned sample_size = frag->size;
2058 int sample_flags = i ? frag->flags : first_sample_flags;
2059 unsigned sample_duration = frag->duration;
2060 int keyframe;
2061
2062 if (flags & 0x100) sample_duration = get_be32(pb);
2063 if (flags & 0x200) sample_size = get_be32(pb);
2064 if (flags & 0x400) sample_flags = get_be32(pb);
2065 if (flags & 0x800) {
2066 sc->ctts_data[sc->ctts_count].count = 1;
2067 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
2068 sc->ctts_count++;
2069 }
2070 if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2071 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2072 distance = 0;
2073 av_add_index_entry(st, offset, dts, sample_size, distance,
2074 keyframe ? AVINDEX_KEYFRAME : 0);
2075 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2076 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2077 offset, dts, sample_size, distance, keyframe);
2078 distance++;
2079 dts += sample_duration;
2080 offset += sample_size;
2081 }
2082 frag->moof_offset = offset;
2083 st->duration = dts;
2084 return 0;
2085 }
2086
2087 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2088 /* like the files created with Adobe Premiere 5.0, for samples see */
2089 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2090 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2091 {
2092 int err;
2093
2094 if (atom.size < 8)
2095 return 0; /* continue */
2096 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2097 url_fskip(pb, atom.size - 4);
2098 return 0;
2099 }
2100 atom.type = get_le32(pb);
2101 atom.size -= 8;
2102 if (atom.type != MKTAG('m','d','a','t')) {
2103 url_fskip(pb, atom.size);
2104 return 0;
2105 }
2106 err = mov_read_mdat(c, pb, atom);
2107 return err;
2108 }
2109
2110 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2111 {
2112 #if CONFIG_ZLIB
2113 ByteIOContext ctx;
2114 uint8_t *cmov_data;
2115 uint8_t *moov_data; /* uncompressed data */
2116 long cmov_len, moov_len;
2117 int ret = -1;
2118
2119 get_be32(pb); /* dcom atom */
2120 if (get_le32(pb) != MKTAG('d','c','o','m'))
2121 return -1;
2122 if (get_le32(pb) != MKTAG('z','l','i','b')) {
2123 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2124 return -1;
2125 }
2126 get_be32(pb); /* cmvd atom */
2127 if (get_le32(pb) != MKTAG('c','m','v','d'))
2128 return -1;
2129 moov_len = get_be32(pb); /* uncompressed size */
2130 cmov_len = atom.size - 6 * 4;
2131
2132 cmov_data = av_malloc(cmov_len);
2133 if (!cmov_data)
2134 return AVERROR(ENOMEM);
2135 moov_data = av_malloc(moov_len);
2136 if (!moov_data) {
2137 av_free(cmov_data);
2138 return AVERROR(ENOMEM);
2139 }
2140 get_buffer(pb, cmov_data, cmov_len);
2141 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2142 goto free_and_return;
2143 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2144 goto free_and_return;
2145 atom.type = MKTAG('m','o','o','v');
2146 atom.size = moov_len;
2147 #ifdef DEBUG
2148 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2149 #endif
2150 ret = mov_read_default(c, &ctx, atom);
2151 free_and_return:
2152 av_free(moov_data);
2153 av_free(cmov_data);
2154 return ret;
2155 #else
2156 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2157 return -1;
2158 #endif
2159 }
2160
2161 /* edit list atom */
2162 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2163 {
2164 MOVStreamContext *sc;
2165 int i, edit_count;
2166
2167 if (c->fc->nb_streams < 1)
2168 return 0;
2169 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2170
2171 get_byte(pb); /* version */
2172 get_be24(pb); /* flags */
2173 edit_count = get_be32(pb); /* entries */
2174
2175 if((uint64_t)edit_count*12+8 > atom.size)
2176 return -1;
2177
2178 for(i=0; i<edit_count; i++){
2179 int time;
2180 int duration = get_be32(pb); /* Track duration */
2181 time = get_be32(pb); /* Media time */
2182 get_be32(pb); /* Media rate */
2183 if (i == 0 && time >= -1) {
2184 sc->time_offset = time != -1 ? time : -duration;
2185 }
2186 }
2187
2188 if(edit_count > 1)
2189 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2190 "a/v desync might occur, patch welcome\n");
2191
2192 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2193 return 0;
2194 }
2195
2196 static const MOVParseTableEntry mov_default_parse_table[] = {
2197 { MKTAG('a','v','s','s'), mov_read_extradata },
2198 { MKTAG('c','h','p','l'), mov_read_chpl },
2199 { MKTAG('c','o','6','4'), mov_read_stco },
2200 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2201 { MKTAG('d','i','n','f'), mov_read_default },
2202 { MKTAG('d','r','e','f'), mov_read_dref },
2203 { MKTAG('e','d','t','s'), mov_read_default },
2204 { MKTAG('e','l','s','t'), mov_read_elst },
2205 { MKTAG('e','n','d','a'), mov_read_enda },
2206 { MKTAG('f','i','e','l'), mov_read_extradata },
2207 { MKTAG('f','t','y','p'), mov_read_ftyp },
2208 { MKTAG('g','l','b','l'), mov_read_glbl },
2209 { MKTAG('h','d','l','r'), mov_read_hdlr },
2210 { MKTAG('i','l','s','t'), mov_read_ilst },
2211 { MKTAG('j','p','2','h'), mov_read_extradata },
2212 { MKTAG('m','d','a','t'), mov_read_mdat },
2213 { MKTAG('m','d','h','d'), mov_read_mdhd },
2214 { MKTAG('m','d','i','a'), mov_read_default },
2215 { MKTAG('m','e','t','a'), mov_read_meta },
2216 { MKTAG('m','i','n','f'), mov_read_default },
2217 { MKTAG('m','o','o','f'), mov_read_moof },
2218 { MKTAG('m','o','o','v'), mov_read_moov },
2219 { MKTAG('m','v','e','x'), mov_read_default },
2220 { MKTAG('m','v','h','d'), mov_read_mvhd },
2221 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2222 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2223 { MKTAG('a','v','c','C'), mov_read_glbl },
2224 { MKTAG('p','a','s','p'), mov_read_pasp },
2225 { MKTAG('s','t','b','l'), mov_read_default },
2226 { MKTAG('s','t','c','o'), mov_read_stco },
2227 { MKTAG('s','t','p','s'), mov_read_stps },
2228 { MKTAG('s','t','r','f'), mov_read_strf },
2229 { MKTAG('s','t','s','c'), mov_read_stsc },
2230 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2231 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2232 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2233 { MKTAG('s','t','t','s'), mov_read_stts },
2234 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2235 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2236 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2237 { MKTAG('t','r','a','k'), mov_read_trak },
2238 { MKTAG('t','r','a','f'), mov_read_default },
2239 { MKTAG('t','r','e','f'), mov_read_default },
2240 { MKTAG('c','h','a','p'), mov_read_chap },
2241 { MKTAG('t','r','e','x'), mov_read_trex },
2242 { MKTAG('t','r','u','n'), mov_read_trun },
2243 { MKTAG('u','d','t','a'), mov_read_default },
2244 { MKTAG('w','a','v','e'), mov_read_wave },
2245 { MKTAG('e','s','d','s'), mov_read_esds },
2246 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2247 { MKTAG('c','m','o','v'), mov_read_cmov },
2248 { 0, NULL }
2249 };
2250
2251 static int mov_probe(AVProbeData *p)
2252 {
2253 unsigned int offset;
2254 uint32_t tag;
2255 int score = 0;
2256
2257 /* check file header */
2258 offset = 0;
2259 for(;;) {
2260 /* ignore invalid offset */
2261 if ((offset + 8) > (unsigned int)p->buf_size)
2262 return score;
2263 tag = AV_RL32(p->buf + offset + 4);
2264 switch(tag) {
2265 /* check for obvious tags */
2266 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2267 case MKTAG('m','o','o','v'):
2268 case MKTAG('m','d','a','t'):
2269 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2270 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2271 case MKTAG('f','t','y','p'):
2272 return AVPROBE_SCORE_MAX;
2273 /* those are more common words, so rate then a bit less */
2274 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2275 case MKTAG('w','i','d','e'):
2276 case MKTAG('f','r','e','e'):
2277 case MKTAG('j','u','n','k'):
2278 case MKTAG('p','i','c','t'):
2279 return AVPROBE_SCORE_MAX - 5;
2280 case MKTAG(0x82,0x82,0x7f,0x7d):
2281 case MKTAG('s','k','i','p'):
2282 case MKTAG('u','u','i','d'):
2283 case MKTAG('p','r','f','l'):
2284 offset = AV_RB32(p->buf+offset) + offset;
2285 /* if we only find those cause probedata is too small at least rate them */
2286 score = AVPROBE_SCORE_MAX - 50;
2287 break;
2288 default:
2289 /* unrecognized tag */
2290 return score;
2291 }
2292 }
2293 return score;
2294 }
2295
2296 // must be done after parsing all trak because there's no order requirement
2297 static void mov_read_chapters(AVFormatContext *s)
2298 {
2299 MOVContext *mov = s->priv_data;
2300 AVStream *st = NULL;
2301 MOVStreamContext *sc;
2302 int64_t cur_pos;
2303 uint8_t *title = NULL;
2304 int i, len, i8, i16;
2305
2306 for (i = 0; i < s->nb_streams; i++)
2307 if (s->streams[i]->id == mov->chapter_track) {
2308 st = s->streams[i];
2309 break;
2310 }
2311 if (!st) {
2312 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2313 return;
2314 }
2315
2316 st->discard = AVDISCARD_ALL;
2317 sc = st->priv_data;
2318 cur_pos = url_ftell(sc->pb);
2319
2320 for (i = 0; i < st->nb_index_entries; i++) {
2321 AVIndexEntry *sample = &st->index_entries[i];
2322 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2323
2324 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2325 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2326 goto finish;
2327 }
2328
2329 title = av_malloc(sample->size+2);
2330 get_buffer(sc->pb, title, sample->size);
2331
2332 // the first two bytes are the length of the title
2333 len = AV_RB16(title);
2334 if (len > sample->size-2)
2335 continue;
2336
2337 // The samples could theoretically be in any encoding if there's an encd
2338 // atom following, but in practice are only utf-8 or utf-16, distinguished
2339 // instead by the presence of a BOM
2340 if (AV_RB16(title+2) == 0xfeff) {
2341 uint8_t *utf8 = av_malloc(2*len+3);
2342
2343 i8 = i16 = 0;
2344 while (i16 < len) {
2345 uint32_t ch;
2346 uint8_t tmp;
2347 GET_UTF16(ch, i16 < len ? AV_RB16(title + (i16+=2)) : 0, break;)
2348 PUT_UTF8(ch, tmp, if (i8 < 2*len) utf8[2+i8++] = tmp;)
2349 }
2350 utf8[2+i8] = 0;
2351 av_freep(&title);
2352 title = utf8;
2353 }
2354
2355 ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title+2);
2356 av_freep(&title);
2357 }
2358 finish:
2359 av_free(title);
2360 url_fseek(sc->pb, cur_pos, SEEK_SET);
2361 }
2362
2363 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2364 {
2365 MOVContext *mov = s->priv_data;
2366 ByteIOContext *pb = s->pb;
2367 int err;
2368 MOVAtom atom = { AV_RL32("root") };
2369
2370 mov->fc = s;
2371 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2372 if(!url_is_streamed(pb))
2373 atom.size = url_fsize(pb);
2374 else
2375 atom.size = INT64_MAX;
2376
2377 /* check MOV header */
2378 if ((err = mov_read_default(mov, pb, atom)) < 0) {
2379 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2380 return err;
2381 }
2382 if (!mov->found_moov) {
2383 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2384 return -1;
2385 }
2386 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2387
2388 if (!url_is_streamed(pb) && mov->chapter_track > 0)
2389 mov_read_chapters(s);
2390
2391 return 0;
2392 }
2393
2394 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2395 {
2396 AVIndexEntry *sample = NULL;
2397 int64_t best_dts = INT64_MAX;
2398 int i;
2399 for (i = 0; i < s->nb_streams; i++) {
2400 AVStream *avst = s->streams[i];
2401 MOVStreamContext *msc = avst->priv_data;
2402 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2403 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2404 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2405 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2406 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2407 (!url_is_streamed(s->pb) &&
2408 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2409 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2410 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2411 sample = current_sample;
2412 best_dts = dts;
2413 *st = avst;
2414 }
2415 }
2416 }
2417 return sample;
2418 }
2419
2420 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2421 {
2422 MOVContext *mov = s->priv_data;
2423 MOVStreamContext *sc;
2424 AVIndexEntry *sample;
2425 AVStream *st = NULL;
2426 int ret;
2427 retry:
2428 sample = mov_find_next_sample(s, &st);
2429 if (!sample) {
2430 mov->found_mdat = 0;
2431 if (!url_is_streamed(s->pb) ||
2432 mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2433 url_feof(s->pb))
2434 return AVERROR_EOF;
2435 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2436 goto retry;
2437 }
2438 sc = st->priv_data;
2439 /* must be done just before reading, to avoid infinite loop on sample */
2440 sc->current_sample++;
2441
2442 if (st->discard != AVDISCARD_ALL) {
2443 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2444 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2445 sc->ffindex, sample->pos);
2446 return -1;
2447 }
2448 ret = av_get_packet(sc->pb, pkt, sample->size);
2449 if (ret < 0)
2450 return ret;
2451 #if CONFIG_DV_DEMUXER
2452 if (mov->dv_demux && sc->dv_audio_container) {
2453 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2454 av_free(pkt->data);
2455 pkt->size = 0;
2456 ret = dv_get_packet(mov->dv_demux, pkt);
2457 if (ret < 0)
2458 return ret;
2459 }
2460 #endif
2461 }
2462
2463 pkt->stream_index = sc->ffindex;
2464 pkt->dts = sample->timestamp;
2465 if (sc->ctts_data) {
2466 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2467 /* update ctts context */
2468 sc->ctts_sample++;
2469 if (sc->ctts_index < sc->ctts_count &&
2470 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2471 sc->ctts_index++;
2472 sc->ctts_sample = 0;
2473 }
2474 if (sc->wrong_dts)
2475 pkt->dts = AV_NOPTS_VALUE;
2476 } else {
2477 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2478 st->index_entries[sc->current_sample].timestamp : st->duration;
2479 pkt->duration = next_dts - pkt->dts;
2480 pkt->pts = pkt->dts;
2481 }
2482 if (st->discard == AVDISCARD_ALL)
2483 goto retry;
2484 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2485 pkt->pos = sample->pos;
2486 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2487 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2488 return 0;
2489 }
2490
2491 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2492 {
2493 MOVStreamContext *sc = st->priv_data;
2494 int sample, time_sample;
2495 int i;
2496
2497 sample = av_index_search_timestamp(st, timestamp, flags);
2498 dprintf(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2499 if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2500 sample = 0;
2501 if (sample < 0) /* not sure what to do */
2502 return -1;
2503 sc->current_sample = sample;
2504 dprintf(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2505 /* adjust ctts index */
2506 if (sc->ctts_data) {
2507 time_sample = 0;
2508 for (i = 0; i < sc->ctts_count; i++) {
2509 int next = time_sample + sc->ctts_data[i].count;
2510 if (next > sc->current_sample) {
2511 sc->ctts_index = i;
2512 sc->ctts_sample = sc->current_sample - time_sample;
2513 break;
2514 }
2515 time_sample = next;
2516 }
2517 }
2518 return sample;
2519 }
2520
2521 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2522 {
2523 AVStream *st;
2524 int64_t seek_timestamp, timestamp;
2525 int sample;
2526 int i;
2527
2528 if (stream_index >= s->nb_streams)
2529 return -1;
2530 if (sample_time < 0)
2531 sample_time = 0;
2532
2533 st = s->streams[stream_index];
2534 sample = mov_seek_stream(s, st, sample_time, flags);
2535 if (sample < 0)
2536 return -1;
2537
2538 /* adjust seek timestamp to found sample timestamp */
2539 seek_timestamp = st->index_entries[sample].timestamp;
2540
2541 for (i = 0; i < s->nb_streams; i++) {
2542 st = s->streams[i];
2543 if (stream_index == i)
2544 continue;
2545
2546 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2547 mov_seek_stream(s, st, timestamp, flags);
2548 }
2549 return 0;
2550 }
2551
2552 static int mov_read_close(AVFormatContext *s)
2553 {
2554 MOVContext *mov = s->priv_data;
2555 int i, j;
2556
2557 for (i = 0; i < s->nb_streams; i++) {
2558 AVStream *st = s->streams[i];
2559 MOVStreamContext *sc = st->priv_data;
2560
2561 av_freep(&sc->ctts_data);
2562 for (j = 0; j < sc->drefs_count; j++) {
2563 av_freep(&sc->drefs[j].path);
2564 av_freep(&sc->drefs[j].dir);
2565 }
2566 av_freep(&sc->drefs);
2567 if (sc->pb && sc->pb != s->pb)
2568 url_fclose(sc->pb);
2569
2570 av_freep(&st->codec->palctrl);
2571 }
2572
2573 if (mov->dv_demux) {
2574 for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2575 av_freep(&mov->dv_fctx->streams[i]->codec);
2576 av_freep(&mov->dv_fctx->streams[i]);
2577 }
2578 av_freep(&mov->dv_fctx);
2579 av_freep(&mov->dv_demux);
2580 }
2581
2582 av_freep(&mov->trex_data);
2583
2584 return 0;
2585 }
2586
2587 AVInputFormat mov_demuxer = {
2588 "mov,mp4,m4a,3gp,3g2,mj2",
2589 NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2590 sizeof(MOVContext),
2591 mov_probe,
2592 mov_read_header,
2593 mov_read_packet,
2594 mov_read_close,
2595 mov_read_seek,
2596 };
Libav master