In mov demuxer, increase total size after debugging message
[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
539 st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
540 dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
541 "sample rate %d ext sample rate %d\n", st->codec->channels,
542 cfg.object_type, cfg.ext_object_type,
543 cfg.sample_rate, cfg.ext_sample_rate);
544 if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
545 cfg.object_type)))
546 st->codec->codec_id = CODEC_ID_AAC;
547 }
548 }
549 }
550 return 0;
551 }
552
553 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
554 {
555 return ff_mov_read_esds(c->fc, pb, atom);
556 }
557
558 static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
559 {
560 const int num = get_be32(pb);
561 const int den = get_be32(pb);
562 AVStream *st;
563
564 if (c->fc->nb_streams < 1)
565 return 0;
566 st = c->fc->streams[c->fc->nb_streams-1];
567
568 if (den != 0) {
569 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
570 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
571 av_log(c->fc, AV_LOG_WARNING,
572 "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
573 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
574 st->sample_aspect_ratio.num = num;
575 st->sample_aspect_ratio.den = den;
576 }
577 return 0;
578 }
579
580 /* this atom contains actual media data */
581 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
582 {
583 if(atom.size == 0) /* wrong one (MP4) */
584 return 0;
585 c->found_mdat=1;
586 return 0; /* now go for moov */
587 }
588
589 /* read major brand, minor version and compatible brands and store them as metadata */
590 static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
591 {
592 uint32_t minor_ver;
593 int comp_brand_size;
594 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
595 char* comp_brands_str;
596 uint8_t type[5] = {0};
597
598 get_buffer(pb, type, 4);
599 if (strcmp(type, "qt "))
600 c->isom = 1;
601 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
602 av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
603 minor_ver = get_be32(pb); /* minor version */
604 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
605 av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
606
607 comp_brand_size = atom.size - 8;
608 if (comp_brand_size < 0)
609 return -1;
610 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
611 if (!comp_brands_str)
612 return AVERROR(ENOMEM);
613 get_buffer(pb, comp_brands_str, comp_brand_size);
614 comp_brands_str[comp_brand_size] = 0;
615 av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
616 av_freep(&comp_brands_str);
617
618 return 0;
619 }
620
621 /* this atom should contain all header atoms */
622 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
623 {
624 if (mov_read_default(c, pb, atom) < 0)
625 return -1;
626 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
627 /* so we don't parse the whole file if over a network */
628 c->found_moov=1;
629 return 0; /* now go for mdat */
630 }
631
632 static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
633 {
634 c->fragment.moof_offset = url_ftell(pb) - 8;
635 dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
636 return mov_read_default(c, pb, atom);
637 }
638
639 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
640 {
641 AVStream *st;
642 MOVStreamContext *sc;
643 int version;
644 char language[4] = {0};
645 unsigned lang;
646
647 if (c->fc->nb_streams < 1)
648 return 0;
649 st = c->fc->streams[c->fc->nb_streams-1];
650 sc = st->priv_data;
651
652 version = get_byte(pb);
653 if (version > 1)
654 return -1; /* unsupported */
655
656 get_be24(pb); /* flags */
657 if (version == 1) {
658 get_be64(pb);
659 get_be64(pb);
660 } else {
661 get_be32(pb); /* creation time */
662 get_be32(pb); /* modification time */
663 }
664
665 sc->time_scale = get_be32(pb);
666 st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
667
668 lang = get_be16(pb); /* language */
669 if (ff_mov_lang_to_iso639(lang, language))
670 av_metadata_set2(&st->metadata, "language", language, 0);
671 get_be16(pb); /* quality */
672
673 return 0;
674 }
675
676 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
677 {
678 int version = get_byte(pb); /* version */
679 get_be24(pb); /* flags */
680
681 if (version == 1) {
682 get_be64(pb);
683 get_be64(pb);
684 } else {
685 get_be32(pb); /* creation time */
686 get_be32(pb); /* modification time */
687 }
688 c->time_scale = get_be32(pb); /* time scale */
689
690 dprintf(c->fc, "time scale = %i\n", c->time_scale);
691
692 c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
693 get_be32(pb); /* preferred scale */
694
695 get_be16(pb); /* preferred volume */
696
697 url_fskip(pb, 10); /* reserved */
698
699 url_fskip(pb, 36); /* display matrix */
700
701 get_be32(pb); /* preview time */
702 get_be32(pb); /* preview duration */
703 get_be32(pb); /* poster time */
704 get_be32(pb); /* selection time */
705 get_be32(pb); /* selection duration */
706 get_be32(pb); /* current time */
707 get_be32(pb); /* next track ID */
708
709 return 0;
710 }
711
712 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
713 {
714 AVStream *st;
715
716 if (c->fc->nb_streams < 1)
717 return 0;
718 st = c->fc->streams[c->fc->nb_streams-1];
719
720 if((uint64_t)atom.size > (1<<30))
721 return -1;
722
723 // currently SVQ3 decoder expect full STSD header - so let's fake it
724 // this should be fixed and just SMI header should be passed
725 av_free(st->codec->extradata);
726 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
727 if (!st->codec->extradata)
728 return AVERROR(ENOMEM);
729 st->codec->extradata_size = 0x5a + atom.size;
730 memcpy(st->codec->extradata, "SVQ3", 4); // fake
731 get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
732 dprintf(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
733 return 0;
734 }
735
736 static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
737 {
738 AVStream *st;
739 int little_endian;
740
741 if (c->fc->nb_streams < 1)
742 return 0;
743 st = c->fc->streams[c->fc->nb_streams-1];
744
745 little_endian = get_be16(pb);
746 dprintf(c->fc, "enda %d\n", little_endian);
747 if (little_endian == 1) {
748 switch (st->codec->codec_id) {
749 case CODEC_ID_PCM_S24BE:
750 st->codec->codec_id = CODEC_ID_PCM_S24LE;
751 break;
752 case CODEC_ID_PCM_S32BE:
753 st->codec->codec_id = CODEC_ID_PCM_S32LE;
754 break;
755 case CODEC_ID_PCM_F32BE:
756 st->codec->codec_id = CODEC_ID_PCM_F32LE;
757 break;
758 case CODEC_ID_PCM_F64BE:
759 st->codec->codec_id = CODEC_ID_PCM_F64LE;
760 break;
761 default:
762 break;
763 }
764 }
765 return 0;
766 }
767
768 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
769 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
770 {
771 AVStream *st;
772 uint64_t size;
773 uint8_t *buf;
774
775 if (c->fc->nb_streams < 1) // will happen with jp2 files
776 return 0;
777 st= c->fc->streams[c->fc->nb_streams-1];
778 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
779 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
780 return -1;
781 buf= av_realloc(st->codec->extradata, size);
782 if(!buf)
783 return -1;
784 st->codec->extradata= buf;
785 buf+= st->codec->extradata_size;
786 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
787 AV_WB32( buf , atom.size + 8);
788 AV_WL32( buf + 4, atom.type);
789 get_buffer(pb, buf + 8, atom.size);
790 return 0;
791 }
792
793 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
794 {
795 AVStream *st;
796
797 if (c->fc->nb_streams < 1)
798 return 0;
799 st = c->fc->streams[c->fc->nb_streams-1];
800
801 if((uint64_t)atom.size > (1<<30))
802 return -1;
803
804 if (st->codec->codec_id == CODEC_ID_QDM2) {
805 // pass all frma atom to codec, needed at least for QDM2
806 av_free(st->codec->extradata);
807 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
808 if (!st->codec->extradata)
809 return AVERROR(ENOMEM);
810 st->codec->extradata_size = atom.size;
811 get_buffer(pb, st->codec->extradata, atom.size);
812 } else if (atom.size > 8) { /* to read frma, esds atoms */
813 if (mov_read_default(c, pb, atom) < 0)
814 return -1;
815 } else
816 url_fskip(pb, atom.size);
817 return 0;
818 }
819
820 /**
821 * This function reads atom content and puts data in extradata without tag
822 * nor size unlike mov_read_extradata.
823 */
824 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
825 {
826 AVStream *st;
827
828 if (c->fc->nb_streams < 1)
829 return 0;
830 st = c->fc->streams[c->fc->nb_streams-1];
831
832 if((uint64_t)atom.size > (1<<30))
833 return -1;
834
835 av_free(st->codec->extradata);
836 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
837 if (!st->codec->extradata)
838 return AVERROR(ENOMEM);
839 st->codec->extradata_size = atom.size;
840 get_buffer(pb, st->codec->extradata, atom.size);
841 return 0;
842 }
843
844 /**
845 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
846 * but can have extradata appended at the end after the 40 bytes belonging
847 * to the struct.
848 */
849 static int mov_read_strf(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
850 {
851 AVStream *st;
852
853 if (c->fc->nb_streams < 1)
854 return 0;
855 if (atom.size <= 40)
856 return 0;
857 st = c->fc->streams[c->fc->nb_streams-1];
858
859 if((uint64_t)atom.size > (1<<30))
860 return -1;
861
862 av_free(st->codec->extradata);
863 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
864 if (!st->codec->extradata)
865 return AVERROR(ENOMEM);
866 st->codec->extradata_size = atom.size - 40;
867 url_fskip(pb, 40);
868 get_buffer(pb, st->codec->extradata, atom.size - 40);
869 return 0;
870 }
871
872 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
873 {
874 AVStream *st;
875 MOVStreamContext *sc;
876 unsigned int i, entries;
877
878 if (c->fc->nb_streams < 1)
879 return 0;
880 st = c->fc->streams[c->fc->nb_streams-1];
881 sc = st->priv_data;
882
883 get_byte(pb); /* version */
884 get_be24(pb); /* flags */
885
886 entries = get_be32(pb);
887
888 if(entries >= UINT_MAX/sizeof(int64_t))
889 return -1;
890
891 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
892 if (!sc->chunk_offsets)
893 return AVERROR(ENOMEM);
894 sc->chunk_count = entries;
895
896 if (atom.type == MKTAG('s','t','c','o'))
897 for(i=0; i<entries; i++)
898 sc->chunk_offsets[i] = get_be32(pb);
899 else if (atom.type == MKTAG('c','o','6','4'))
900 for(i=0; i<entries; i++)
901 sc->chunk_offsets[i] = get_be64(pb);
902 else
903 return -1;
904
905 return 0;
906 }
907
908 /**
909 * Compute codec id for 'lpcm' tag.
910 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
911 */
912 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
913 {
914 if (flags & 1) { // floating point
915 if (flags & 2) { // big endian
916 if (bps == 32) return CODEC_ID_PCM_F32BE;
917 else if (bps == 64) return CODEC_ID_PCM_F64BE;
918 } else {
919 if (bps == 32) return CODEC_ID_PCM_F32LE;
920 else if (bps == 64) return CODEC_ID_PCM_F64LE;
921 }
922 } else {
923 if (flags & 2) {
924 if (bps == 8)
925 // signed integer
926 if (flags & 4) return CODEC_ID_PCM_S8;
927 else return CODEC_ID_PCM_U8;
928 else if (bps == 16) return CODEC_ID_PCM_S16BE;
929 else if (bps == 24) return CODEC_ID_PCM_S24BE;
930 else if (bps == 32) return CODEC_ID_PCM_S32BE;
931 } else {
932 if (bps == 8)
933 if (flags & 4) return CODEC_ID_PCM_S8;
934 else return CODEC_ID_PCM_U8;
935 else if (bps == 16) return CODEC_ID_PCM_S16LE;
936 else if (bps == 24) return CODEC_ID_PCM_S24LE;
937 else if (bps == 32) return CODEC_ID_PCM_S32LE;
938 }
939 }
940 return CODEC_ID_NONE;
941 }
942
943 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
944 {
945 AVStream *st;
946 MOVStreamContext *sc;
947 int j, entries, pseudo_stream_id;
948
949 if (c->fc->nb_streams < 1)
950 return 0;
951 st = c->fc->streams[c->fc->nb_streams-1];
952 sc = st->priv_data;
953
954 get_byte(pb); /* version */
955 get_be24(pb); /* flags */
956
957 entries = get_be32(pb);
958
959 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
960 //Parsing Sample description table
961 enum CodecID id;
962 int dref_id = 1;
963 MOVAtom a = { AV_RL32("stsd") };
964 int64_t start_pos = url_ftell(pb);
965 int size = get_be32(pb); /* size */
966 uint32_t format = get_le32(pb); /* data format */
967
968 if (size >= 16) {
969 get_be32(pb); /* reserved */
970 get_be16(pb); /* reserved */
971 dref_id = get_be16(pb);
972 }
973
974 if (st->codec->codec_tag &&
975 st->codec->codec_tag != format &&
976 (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
977 : st->codec->codec_tag != MKTAG('j','p','e','g'))
978 ){
979 /* Multiple fourcc, we skip JPEG. This is not correct, we should
980 * export it as a separate AVStream but this needs a few changes
981 * in the MOV demuxer, patch welcome. */
982 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
983 url_fskip(pb, size - (url_ftell(pb) - start_pos));
984 continue;
985 }
986 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
987 sc->dref_id= dref_id;
988
989 st->codec->codec_tag = format;
990 id = ff_codec_get_id(codec_movaudio_tags, format);
991 if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
992 id = ff_codec_get_id(ff_codec_wav_tags, bswap_32(format)&0xFFFF);
993
994 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
995 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
996 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
997 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
998 id = ff_codec_get_id(codec_movvideo_tags, format);
999 if (id <= 0)
1000 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1001 if (id > 0)
1002 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1003 else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
1004 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1005 if(id > 0)
1006 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1007 }
1008 }
1009
1010 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
1011 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1012 (format >> 24) & 0xff, st->codec->codec_type);
1013
1014 if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1015 unsigned int color_depth, len;
1016 int color_greyscale;
1017
1018 st->codec->codec_id = id;
1019 get_be16(pb); /* version */
1020 get_be16(pb); /* revision level */
1021 get_be32(pb); /* vendor */
1022 get_be32(pb); /* temporal quality */
1023 get_be32(pb); /* spatial quality */
1024
1025 st->codec->width = get_be16(pb); /* width */
1026 st->codec->height = get_be16(pb); /* height */
1027
1028 get_be32(pb); /* horiz resolution */
1029 get_be32(pb); /* vert resolution */
1030 get_be32(pb); /* data size, always 0 */
1031 get_be16(pb); /* frames per samples */
1032
1033 len = get_byte(pb); /* codec name, pascal string */
1034 if (len > 31)
1035 len = 31;
1036 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1037 if (len < 31)
1038 url_fskip(pb, 31 - len);
1039 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1040 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1041 st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1042
1043 st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
1044 st->codec->color_table_id = get_be16(pb); /* colortable id */
1045 dprintf(c->fc, "depth %d, ctab id %d\n",
1046 st->codec->bits_per_coded_sample, st->codec->color_table_id);
1047 /* figure out the palette situation */
1048 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1049 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1050
1051 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1052 if ((color_depth == 2) || (color_depth == 4) ||
1053 (color_depth == 8)) {
1054 /* for palette traversal */
1055 unsigned int color_start, color_count, color_end;
1056 unsigned char r, g, b;
1057
1058 st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1059 if (color_greyscale) {
1060 int color_index, color_dec;
1061 /* compute the greyscale palette */
1062 st->codec->bits_per_coded_sample = color_depth;
1063 color_count = 1 << color_depth;
1064 color_index = 255;
1065 color_dec = 256 / (color_count - 1);
1066 for (j = 0; j < color_count; j++) {
1067 r = g = b = color_index;
1068 st->codec->palctrl->palette[j] =
1069 (r << 16) | (g << 8) | (b);
1070 color_index -= color_dec;
1071 if (color_index < 0)
1072 color_index = 0;
1073 }
1074 } else if (st->codec->color_table_id) {
1075 const uint8_t *color_table;
1076 /* if flag bit 3 is set, use the default palette */
1077 color_count = 1 << color_depth;
1078 if (color_depth == 2)
1079 color_table = ff_qt_default_palette_4;
1080 else if (color_depth == 4)
1081 color_table = ff_qt_default_palette_16;
1082 else
1083 color_table = ff_qt_default_palette_256;
1084
1085 for (j = 0; j < color_count; j++) {
1086 r = color_table[j * 3 + 0];
1087 g = color_table[j * 3 + 1];
1088 b = color_table[j * 3 + 2];
1089 st->codec->palctrl->palette[j] =
1090 (r << 16) | (g << 8) | (b);
1091 }
1092 } else {
1093 /* load the palette from the file */
1094 color_start = get_be32(pb);
1095 color_count = get_be16(pb);
1096 color_end = get_be16(pb);
1097 if ((color_start <= 255) &&
1098 (color_end <= 255)) {
1099 for (j = color_start; j <= color_end; j++) {
1100 /* each R, G, or B component is 16 bits;
1101 * only use the top 8 bits; skip alpha bytes
1102 * up front */
1103 get_byte(pb);
1104 get_byte(pb);
1105 r = get_byte(pb);
1106 get_byte(pb);
1107 g = get_byte(pb);
1108 get_byte(pb);
1109 b = get_byte(pb);
1110 get_byte(pb);
1111 st->codec->palctrl->palette[j] =
1112 (r << 16) | (g << 8) | (b);
1113 }
1114 }
1115 }
1116 st->codec->palctrl->palette_changed = 1;
1117 }
1118 } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1119 int bits_per_sample, flags;
1120 uint16_t version = get_be16(pb);
1121
1122 st->codec->codec_id = id;
1123 get_be16(pb); /* revision level */
1124 get_be32(pb); /* vendor */
1125
1126 st->codec->channels = get_be16(pb); /* channel count */
1127 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
1128 st->codec->bits_per_coded_sample = get_be16(pb); /* sample size */
1129
1130 sc->audio_cid = get_be16(pb);
1131 get_be16(pb); /* packet size = 0 */
1132
1133 st->codec->sample_rate = ((get_be32(pb) >> 16));
1134
1135 //Read QT version 1 fields. In version 0 these do not exist.
1136 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
1137 if(!c->isom) {
1138 if(version==1) {
1139 sc->samples_per_frame = get_be32(pb);
1140 get_be32(pb); /* bytes per packet */
1141 sc->bytes_per_frame = get_be32(pb);
1142 get_be32(pb); /* bytes per sample */
1143 } else if(version==2) {
1144 get_be32(pb); /* sizeof struct only */
1145 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
1146 st->codec->channels = get_be32(pb);
1147 get_be32(pb); /* always 0x7F000000 */
1148 st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
1149 flags = get_be32(pb); /* lpcm format specific flag */
1150 sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
1151 sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1152 if (format == MKTAG('l','p','c','m'))
1153 st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1154 }
1155 }
1156
1157 switch (st->codec->codec_id) {
1158 case CODEC_ID_PCM_S8:
1159 case CODEC_ID_PCM_U8:
1160 if (st->codec->bits_per_coded_sample == 16)
1161 st->codec->codec_id = CODEC_ID_PCM_S16BE;
1162 break;
1163 case CODEC_ID_PCM_S16LE:
1164 case CODEC_ID_PCM_S16BE:
1165 if (st->codec->bits_per_coded_sample == 8)
1166 st->codec->codec_id = CODEC_ID_PCM_S8;
1167 else if (st->codec->bits_per_coded_sample == 24)
1168 st->codec->codec_id =
1169 st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1170 CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1171 break;
1172 /* set values for old format before stsd version 1 appeared */
1173 case CODEC_ID_MACE3:
1174 sc->samples_per_frame = 6;
1175 sc->bytes_per_frame = 2*st->codec->channels;
1176 break;
1177 case CODEC_ID_MACE6:
1178 sc->samples_per_frame = 6;
1179 sc->bytes_per_frame = 1*st->codec->channels;
1180 break;
1181 case CODEC_ID_ADPCM_IMA_QT:
1182 sc->samples_per_frame = 64;
1183 sc->bytes_per_frame = 34*st->codec->channels;
1184 break;
1185 case CODEC_ID_GSM:
1186 sc->samples_per_frame = 160;
1187 sc->bytes_per_frame = 33;
1188 break;
1189 default:
1190 break;
1191 }
1192
1193 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1194 if (bits_per_sample) {
1195 st->codec->bits_per_coded_sample = bits_per_sample;
1196 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1197 }
1198 } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1199 // ttxt stsd contains display flags, justification, background
1200 // color, fonts, and default styles, so fake an atom to read it
1201 MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1202 if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1203 mov_read_glbl(c, pb, fake_atom);
1204 st->codec->codec_id= id;
1205 st->codec->width = sc->width;
1206 st->codec->height = sc->height;
1207 } else {
1208 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1209 url_fskip(pb, size - (url_ftell(pb) - start_pos));
1210 }
1211 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1212 a.size = size - (url_ftell(pb) - start_pos);
1213 if (a.size > 8) {
1214 if (mov_read_default(c, pb, a) < 0)
1215 return -1;
1216 } else if (a.size > 0)
1217 url_fskip(pb, a.size);
1218 }
1219
1220 if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1221 st->codec->sample_rate= sc->time_scale;
1222
1223 /* special codec parameters handling */
1224 switch (st->codec->codec_id) {
1225 #if CONFIG_DV_DEMUXER
1226 case CODEC_ID_DVAUDIO:
1227 c->dv_fctx = avformat_alloc_context();
1228 c->dv_demux = dv_init_demux(c->dv_fctx);
1229 if (!c->dv_demux) {
1230 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1231 return -1;
1232 }
1233 sc->dv_audio_container = 1;
1234 st->codec->codec_id = CODEC_ID_PCM_S16LE;
1235 break;
1236 #endif
1237 /* no ifdef since parameters are always those */
1238 case CODEC_ID_QCELP:
1239 // force sample rate for qcelp when not stored in mov
1240 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1241 st->codec->sample_rate = 8000;
1242 st->codec->frame_size= 160;
1243 st->codec->channels= 1; /* really needed */
1244 break;
1245 case CODEC_ID_AMR_NB:
1246 case CODEC_ID_AMR_WB:
1247 st->codec->frame_size= sc->samples_per_frame;
1248 st->codec->channels= 1; /* really needed */
1249 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1250 if (st->codec->codec_id == CODEC_ID_AMR_NB)
1251 st->codec->sample_rate = 8000;
1252 else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1253 st->codec->sample_rate = 16000;
1254 break;
1255 case CODEC_ID_MP2:
1256 case CODEC_ID_MP3:
1257 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1258 st->need_parsing = AVSTREAM_PARSE_FULL;
1259 break;
1260 case CODEC_ID_GSM:
1261 case CODEC_ID_ADPCM_MS:
1262 case CODEC_ID_ADPCM_IMA_WAV:
1263 st->codec->block_align = sc->bytes_per_frame;
1264 break;
1265 case CODEC_ID_ALAC:
1266 if (st->codec->extradata_size == 36) {
1267 st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1268 st->codec->channels = AV_RB8 (st->codec->extradata+21);
1269 }
1270 break;
1271 default:
1272 break;
1273 }
1274
1275 return 0;
1276 }
1277
1278 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1279 {
1280 AVStream *st;
1281 MOVStreamContext *sc;
1282 unsigned int i, entries;
1283
1284 if (c->fc->nb_streams < 1)
1285 return 0;
1286 st = c->fc->streams[c->fc->nb_streams-1];
1287 sc = st->priv_data;
1288
1289 get_byte(pb); /* version */
1290 get_be24(pb); /* flags */
1291
1292 entries = get_be32(pb);
1293
1294 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1295
1296 if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1297 return -1;
1298 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1299 if (!sc->stsc_data)
1300 return AVERROR(ENOMEM);
1301 sc->stsc_count = entries;
1302
1303 for(i=0; i<entries; i++) {
1304 sc->stsc_data[i].first = get_be32(pb);
1305 sc->stsc_data[i].count = get_be32(pb);
1306 sc->stsc_data[i].id = get_be32(pb);
1307 }
1308 return 0;
1309 }
1310
1311 static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1312 {
1313 AVStream *st;
1314 MOVStreamContext *sc;
1315 unsigned i, entries;
1316
1317 if (c->fc->nb_streams < 1)
1318 return 0;
1319 st = c->fc->streams[c->fc->nb_streams-1];
1320 sc = st->priv_data;
1321
1322 get_be32(pb); // version + flags
1323
1324 entries = get_be32(pb);
1325 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1326 return -1;
1327 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1328 if (!sc->stps_data)
1329 return AVERROR(ENOMEM);
1330 sc->stps_count = entries;
1331
1332 for (i = 0; i < entries; i++) {
1333 sc->stps_data[i] = get_be32(pb);
1334 //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1335 }
1336
1337 return 0;
1338 }
1339
1340 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1341 {
1342 AVStream *st;
1343 MOVStreamContext *sc;
1344 unsigned int i, entries;
1345
1346 if (c->fc->nb_streams < 1)
1347 return 0;
1348 st = c->fc->streams[c->fc->nb_streams-1];
1349 sc = st->priv_data;
1350
1351 get_byte(pb); /* version */
1352 get_be24(pb); /* flags */
1353
1354 entries = get_be32(pb);
1355
1356 dprintf(c->fc, "keyframe_count = %d\n", entries);
1357
1358 if(entries >= UINT_MAX / sizeof(int))
1359 return -1;
1360 sc->keyframes = av_malloc(entries * sizeof(int));
1361 if (!sc->keyframes)
1362 return AVERROR(ENOMEM);
1363 sc->keyframe_count = entries;
1364
1365 for(i=0; i<entries; i++) {
1366 sc->keyframes[i] = get_be32(pb);
1367 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1368 }
1369 return 0;
1370 }
1371
1372 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1373 {
1374 AVStream *st;
1375 MOVStreamContext *sc;
1376 unsigned int i, entries, sample_size, field_size, num_bytes;
1377 GetBitContext gb;
1378 unsigned char* buf;
1379
1380 if (c->fc->nb_streams < 1)
1381 return 0;
1382 st = c->fc->streams[c->fc->nb_streams-1];
1383 sc = st->priv_data;
1384
1385 get_byte(pb); /* version */
1386 get_be24(pb); /* flags */
1387
1388 if (atom.type == MKTAG('s','t','s','z')) {
1389 sample_size = get_be32(pb);
1390 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1391 sc->sample_size = sample_size;
1392 field_size = 32;
1393 } else {
1394 sample_size = 0;
1395 get_be24(pb); /* reserved */
1396 field_size = get_byte(pb);
1397 }
1398 entries = get_be32(pb);
1399
1400 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1401
1402 sc->sample_count = entries;
1403 if (sample_size)
1404 return 0;
1405
1406 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1407 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1408 return -1;
1409 }
1410
1411 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1412 return -1;
1413 sc->sample_sizes = av_malloc(entries * sizeof(int));
1414 if (!sc->sample_sizes)
1415 return AVERROR(ENOMEM);
1416
1417 num_bytes = (entries*field_size+4)>>3;
1418
1419 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1420 if (!buf) {
1421 av_freep(&sc->sample_sizes);
1422 return AVERROR(ENOMEM);
1423 }
1424
1425 if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1426 av_freep(&sc->sample_sizes);
1427 av_free(buf);
1428 return -1;
1429 }
1430
1431 init_get_bits(&gb, buf, 8*num_bytes);
1432
1433 for(i=0; i<entries; i++)
1434 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1435
1436 av_free(buf);
1437 return 0;
1438 }
1439
1440 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1441 {
1442 AVStream *st;
1443 MOVStreamContext *sc;
1444 unsigned int i, entries;
1445 int64_t duration=0;
1446 int64_t total_sample_count=0;
1447
1448 if (c->fc->nb_streams < 1)
1449 return 0;
1450 st = c->fc->streams[c->fc->nb_streams-1];
1451 sc = st->priv_data;
1452
1453 get_byte(pb); /* version */
1454 get_be24(pb); /* flags */
1455 entries = get_be32(pb);
1456
1457 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1458
1459 if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1460 return -1;
1461 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1462 if (!sc->stts_data)
1463 return AVERROR(ENOMEM);
1464 sc->stts_count = entries;
1465
1466 for(i=0; i<entries; i++) {
1467 int sample_duration;
1468 int sample_count;
1469
1470 sample_count=get_be32(pb);
1471 sample_duration = get_be32(pb);
1472 sc->stts_data[i].count= sample_count;
1473 sc->stts_data[i].duration= sample_duration;
1474
1475 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1476
1477 duration+=(int64_t)sample_duration*sample_count;
1478 total_sample_count+=sample_count;
1479 }
1480
1481 st->nb_frames= total_sample_count;
1482 if(duration)
1483 st->duration= duration;
1484 return 0;
1485 }
1486
1487 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1488 {
1489 AVStream *st;
1490 MOVStreamContext *sc;
1491 unsigned int i, entries;
1492
1493 if (c->fc->nb_streams < 1)
1494 return 0;
1495 st = c->fc->streams[c->fc->nb_streams-1];
1496 sc = st->priv_data;
1497
1498 get_byte(pb); /* version */
1499 get_be24(pb); /* flags */
1500 entries = get_be32(pb);
1501
1502 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1503
1504 if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1505 return -1;
1506 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1507 if (!sc->ctts_data)
1508 return AVERROR(ENOMEM);
1509 sc->ctts_count = entries;
1510
1511 for(i=0; i<entries; i++) {
1512 int count =get_be32(pb);
1513 int duration =get_be32(pb);
1514
1515 sc->ctts_data[i].count = count;
1516 sc->ctts_data[i].duration= duration;
1517 if (duration < 0)
1518 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1519 }
1520
1521 dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1522
1523 return 0;
1524 }
1525
1526 static void mov_build_index(MOVContext *mov, AVStream *st)
1527 {
1528 MOVStreamContext *sc = st->priv_data;
1529 int64_t current_offset;
1530 int64_t current_dts = 0;
1531 unsigned int stts_index = 0;
1532 unsigned int stsc_index = 0;
1533 unsigned int stss_index = 0;
1534 unsigned int stps_index = 0;
1535 unsigned int i, j;
1536 uint64_t stream_size = 0;
1537
1538 /* adjust first dts according to edit list */
1539 if (sc->time_offset) {
1540 int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1541 current_dts = -rescaled;
1542 if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1543 /* more than 16 frames delay, dts are likely wrong
1544 this happens with files created by iMovie */
1545 sc->wrong_dts = 1;
1546 st->codec->has_b_frames = 1;
1547 }
1548 }
1549
1550 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1551 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1552 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1553 unsigned int current_sample = 0;
1554 unsigned int stts_sample = 0;
1555 unsigned int sample_size;
1556 unsigned int distance = 0;
1557 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1558
1559 current_dts -= sc->dts_shift;
1560
1561 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1562 return;
1563 st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1564 if (!st->index_entries)
1565 return;
1566 st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1567
1568 for (i = 0; i < sc->chunk_count; i++) {
1569 current_offset = sc->chunk_offsets[i];
1570 if (stsc_index + 1 < sc->stsc_count &&
1571 i + 1 == sc->stsc_data[stsc_index + 1].first)
1572 stsc_index++;
1573 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1574 int keyframe = 0;
1575 if (current_sample >= sc->sample_count) {
1576 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1577 return;
1578 }
1579
1580 if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1581 keyframe = 1;
1582 if (stss_index + 1 < sc->keyframe_count)
1583 stss_index++;
1584 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1585 keyframe = 1;
1586 if (stps_index + 1 < sc->stps_count)
1587 stps_index++;
1588 }
1589 if (keyframe)
1590 distance = 0;
1591 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1592 if(sc->pseudo_stream_id == -1 ||
1593 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1594 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1595 e->pos = current_offset;
1596 e->timestamp = current_dts;
1597 e->size = sample_size;
1598 e->min_distance = distance;
1599 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1600 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1601 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1602 current_offset, current_dts, sample_size, distance, keyframe);
1603 }
1604
1605 current_offset += sample_size;
1606 stream_size += sample_size;
1607 current_dts += sc->stts_data[stts_index].duration;
1608 distance++;
1609 stts_sample++;
1610 current_sample++;
1611 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1612 stts_sample = 0;
1613 stts_index++;
1614 }
1615 }
1616 }
1617 if (st->duration > 0)
1618 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1619 } else {
1620 unsigned chunk_samples, total = 0;
1621
1622 // compute total chunk count
1623 for (i = 0; i < sc->stsc_count; i++) {
1624 unsigned count, chunk_count;
1625
1626 chunk_samples = sc->stsc_data[i].count;
1627 if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1628 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1629 return;
1630 }
1631
1632 if (sc->samples_per_frame >= 160) { // gsm
1633 count = chunk_samples / sc->samples_per_frame;
1634 } else if (sc->samples_per_frame > 1) {
1635 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1636 count = (chunk_samples+samples-1) / samples;
1637 } else {
1638 count = (chunk_samples+1023) / 1024;
1639 }
1640
1641 if (i < sc->stsc_count - 1)
1642 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1643 else
1644 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1645 total += chunk_count * count;
1646 }
1647
1648 dprintf(mov->fc, "chunk count %d\n", total);
1649 if (total >= UINT_MAX / sizeof(*st->index_entries))
1650 return;
1651 st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1652 if (!st->index_entries)
1653 return;
1654 st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1655
1656 // populate index
1657 for (i = 0; i < sc->chunk_count; i++) {
1658 current_offset = sc->chunk_offsets[i];
1659 if (stsc_index + 1 < sc->stsc_count &&
1660 i + 1 == sc->stsc_data[stsc_index + 1].first)
1661 stsc_index++;
1662 chunk_samples = sc->stsc_data[stsc_index].count;
1663
1664 while (chunk_samples > 0) {
1665 AVIndexEntry *e;
1666 unsigned size, samples;
1667
1668 if (sc->samples_per_frame >= 160) { // gsm
1669 samples = sc->samples_per_frame;
1670 size = sc->bytes_per_frame;
1671 } else {
1672 if (sc->samples_per_frame > 1) {
1673 samples = FFMIN((1024 / sc->samples_per_frame)*
1674 sc->samples_per_frame, chunk_samples);
1675 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1676 } else {
1677 samples = FFMIN(1024, chunk_samples);
1678 size = samples * sc->sample_size;
1679 }
1680 }
1681
1682 if (st->nb_index_entries >= total) {
1683 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1684 return;
1685 }
1686 e = &st->index_entries[st->nb_index_entries++];
1687 e->pos = current_offset;
1688 e->timestamp = current_dts;
1689 e->size = size;
1690 e->min_distance = 0;
1691 e->flags = AVINDEX_KEYFRAME;
1692 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1693 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1694 size, samples);
1695
1696 current_offset += size;
1697 current_dts += samples;
1698 chunk_samples -= samples;
1699 }
1700 }
1701 }
1702 }
1703
1704 static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
1705 {
1706 /* try relative path, we do not try the absolute because it can leak information about our
1707 system to an attacker */
1708 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1709 char filename[1024];
1710 char *src_path;
1711 int i, l;
1712
1713 /* find a source dir */
1714 src_path = strrchr(src, '/');
1715 if (src_path)
1716 src_path++;
1717 else
1718 src_path = src;
1719
1720 /* find a next level down to target */
1721 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1722 if (ref->path[l] == '/') {
1723 if (i == ref->nlvl_to - 1)
1724 break;
1725 else
1726 i++;
1727 }
1728
1729 /* compose filename if next level down to target was found */
1730 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
1731 memcpy(filename, src, src_path - src);
1732 filename[src_path - src] = 0;
1733
1734 for (i = 1; i < ref->nlvl_from; i++)
1735 av_strlcat(filename, "../", 1024);
1736
1737 av_strlcat(filename, ref->path + l + 1, 1024);
1738
1739 if (!url_fopen(pb, filename, URL_RDONLY))
1740 return 0;
1741 }
1742 }
1743
1744 return AVERROR(ENOENT);
1745 };
1746
1747 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1748 {
1749 AVStream *st;
1750 MOVStreamContext *sc;
1751 int ret;
1752
1753 st = av_new_stream(c->fc, c->fc->nb_streams);
1754 if (!st) return AVERROR(ENOMEM);
1755 sc = av_mallocz(sizeof(MOVStreamContext));
1756 if (!sc) return AVERROR(ENOMEM);
1757
1758 st->priv_data = sc;
1759 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1760 sc->ffindex = st->index;
1761
1762 if ((ret = mov_read_default(c, pb, atom)) < 0)
1763 return ret;
1764
1765 /* sanity checks */
1766 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1767 (!sc->sample_size && !sc->sample_count))) {
1768 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1769 st->index);
1770 return 0;
1771 }
1772
1773 if (!sc->time_scale) {
1774 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1775 sc->time_scale = c->time_scale;
1776 if (!sc->time_scale)
1777 sc->time_scale = 1;
1778 }
1779
1780 av_set_pts_info(st, 64, 1, sc->time_scale);
1781
1782 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1783 !st->codec->frame_size && sc->stts_count == 1) {
1784 st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1785 st->codec->sample_rate, sc->time_scale);
1786 dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1787 }
1788
1789 mov_build_index(c, st);
1790
1791 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1792 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1793 if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1794 av_log(c->fc, AV_LOG_ERROR,
1795 "stream %d, error opening alias: path='%s', dir='%s', "
1796 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1797 st->index, dref->path, dref->dir, dref->filename,
1798 dref->volume, dref->nlvl_from, dref->nlvl_to);
1799 } else
1800 sc->pb = c->fc->pb;
1801
1802 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1803 if (st->codec->width != sc->width || st->codec->height != sc->height) {
1804 AVRational r = av_d2q(((double)st->codec->height * sc->width) /
1805 ((double)st->codec->width * sc->height), INT_MAX);
1806 if (st->sample_aspect_ratio.num)
1807 st->sample_aspect_ratio = av_mul_q(st->sample_aspect_ratio, r);
1808 else
1809 st->sample_aspect_ratio = r;
1810 }
1811
1812 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1813 sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1814 }
1815
1816 switch (st->codec->codec_id) {
1817 #if CONFIG_H261_DECODER
1818 case CODEC_ID_H261:
1819 #endif
1820 #if CONFIG_H263_DECODER
1821 case CODEC_ID_H263:
1822 #endif
1823 #if CONFIG_H264_DECODER
1824 case CODEC_ID_H264:
1825 #endif
1826 #if CONFIG_MPEG4_DECODER
1827 case CODEC_ID_MPEG4:
1828 #endif
1829 st->codec->width = 0; /* let decoder init width/height */
1830 st->codec->height= 0;
1831 break;
1832 }
1833
1834 /* Do not need those anymore. */
1835 av_freep(&sc->chunk_offsets);
1836 av_freep(&sc->stsc_data);
1837 av_freep(&sc->sample_sizes);
1838 av_freep(&sc->keyframes);
1839 av_freep(&sc->stts_data);
1840 av_freep(&sc->stps_data);
1841
1842 return 0;
1843 }
1844
1845 static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1846 {
1847 int ret;
1848 c->itunes_metadata = 1;
1849 ret = mov_read_default(c, pb, atom);
1850 c->itunes_metadata = 0;
1851 return ret;
1852 }
1853
1854 static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1855 {
1856 while (atom.size > 8) {
1857 uint32_t tag = get_le32(pb);
1858 atom.size -= 4;
1859 if (tag == MKTAG('h','d','l','r')) {
1860 url_fseek(pb, -8, SEEK_CUR);
1861 atom.size += 8;
1862 return mov_read_default(c, pb, atom);
1863 }
1864 }
1865 return 0;
1866 }
1867
1868 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1869 {
1870 int i;
1871 int width;
1872 int height;
1873 int64_t disp_transform[2];
1874 int display_matrix[3][2];
1875 AVStream *st;
1876 MOVStreamContext *sc;
1877 int version;
1878
1879 if (c->fc->nb_streams < 1)
1880 return 0;
1881 st = c->fc->streams[c->fc->nb_streams-1];
1882 sc = st->priv_data;
1883
1884 version = get_byte(pb);
1885 get_be24(pb); /* flags */
1886 /*
1887 MOV_TRACK_ENABLED 0x0001
1888 MOV_TRACK_IN_MOVIE 0x0002
1889 MOV_TRACK_IN_PREVIEW 0x0004
1890 MOV_TRACK_IN_POSTER 0x0008
1891 */
1892
1893 if (version == 1) {
1894 get_be64(pb);
1895 get_be64(pb);
1896 } else {
1897 get_be32(pb); /* creation time */
1898 get_be32(pb); /* modification time */
1899 }
1900 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1901 get_be32(pb); /* reserved */
1902
1903 /* highlevel (considering edits) duration in movie timebase */
1904 (version == 1) ? get_be64(pb) : get_be32(pb);
1905 get_be32(pb); /* reserved */
1906 get_be32(pb); /* reserved */
1907
1908 get_be16(pb); /* layer */
1909 get_be16(pb); /* alternate group */
1910 get_be16(pb); /* volume */
1911 get_be16(pb); /* reserved */
1912
1913 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1914 // they're kept in fixed point format through all calculations
1915 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1916 for (i = 0; i < 3; i++) {
1917 display_matrix[i][0] = get_be32(pb); // 16.16 fixed point
1918 display_matrix[i][1] = get_be32(pb); // 16.16 fixed point
1919 get_be32(pb); // 2.30 fixed point (not used)
1920 }
1921
1922 width = get_be32(pb); // 16.16 fixed point track width
1923 height = get_be32(pb); // 16.16 fixed point track height
1924 sc->width = width >> 16;
1925 sc->height = height >> 16;
1926
1927 // transform the display width/height according to the matrix
1928 // skip this if the display matrix is the default identity matrix
1929 // or if it is rotating the picture, ex iPhone 3GS
1930 // to keep the same scale, use [width height 1<<16]
1931 if (width && height &&
1932 ((display_matrix[0][0] != 65536 ||
1933 display_matrix[1][1] != 65536) &&
1934 !display_matrix[0][1] &&
1935 !display_matrix[1][0] &&
1936 !display_matrix[2][0] && !display_matrix[2][1])) {
1937 for (i = 0; i < 2; i++)
1938 disp_transform[i] =
1939 (int64_t) width * display_matrix[0][i] +
1940 (int64_t) height * display_matrix[1][i] +
1941 ((int64_t) display_matrix[2][i] << 16);
1942
1943 //sample aspect ratio is new width/height divided by old width/height
1944 st->sample_aspect_ratio = av_d2q(
1945 ((double) disp_transform[0] * height) /
1946 ((double) disp_transform[1] * width), INT_MAX);
1947 }
1948 return 0;
1949 }
1950
1951 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1952 {
1953 MOVFragment *frag = &c->fragment;
1954 MOVTrackExt *trex = NULL;
1955 int flags, track_id, i;
1956
1957 get_byte(pb); /* version */
1958 flags = get_be24(pb);
1959
1960 track_id = get_be32(pb);
1961 if (!track_id)
1962 return -1;
1963 frag->track_id = track_id;
1964 for (i = 0; i < c->trex_count; i++)
1965 if (c->trex_data[i].track_id == frag->track_id) {
1966 trex = &c->trex_data[i];
1967 break;
1968 }
1969 if (!trex) {
1970 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1971 return -1;
1972 }
1973
1974 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1975 else frag->base_data_offset = frag->moof_offset;
1976 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1977 else frag->stsd_id = trex->stsd_id;
1978
1979 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1980 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1981 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1982 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1983 return 0;
1984 }
1985
1986 static int mov_read_chap(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1987 {
1988 c->chapter_track = get_be32(pb);
1989 return 0;
1990 }
1991
1992 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1993 {
1994 MOVTrackExt *trex;
1995
1996 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1997 return -1;
1998 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1999 if (!trex)
2000 return AVERROR(ENOMEM);
2001 c->trex_data = trex;
2002 trex = &c->trex_data[c->trex_count++];
2003 get_byte(pb); /* version */
2004 get_be24(pb); /* flags */
2005 trex->track_id = get_be32(pb);
2006 trex->stsd_id = get_be32(pb);
2007 trex->duration = get_be32(pb);
2008 trex->size = get_be32(pb);
2009 trex->flags = get_be32(pb);
2010 return 0;
2011 }
2012
2013 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2014 {
2015 MOVFragment *frag = &c->fragment;
2016 AVStream *st = NULL;
2017 MOVStreamContext *sc;
2018 uint64_t offset;
2019 int64_t dts;
2020 int data_offset = 0;
2021 unsigned entries, first_sample_flags = frag->flags;
2022 int flags, distance, i;
2023
2024 for (i = 0; i < c->fc->nb_streams; i++) {
2025 if (c->fc->streams[i]->id == frag->track_id) {
2026 st = c->fc->streams[i];
2027 break;
2028 }
2029 }
2030 if (!st) {
2031 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2032 return -1;
2033 }
2034 sc = st->priv_data;
2035 if (sc->pseudo_stream_id+1 != frag->stsd_id)
2036 return 0;
2037 get_byte(pb); /* version */
2038 flags = get_be24(pb);
2039 entries = get_be32(pb);
2040 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
2041 if (flags & 0x001) data_offset = get_be32(pb);
2042 if (flags & 0x004) first_sample_flags = get_be32(pb);
2043 if (flags & 0x800) {
2044 MOVStts *ctts_data;
2045 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2046 return -1;
2047 ctts_data = av_realloc(sc->ctts_data,
2048 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2049 if (!ctts_data)
2050 return AVERROR(ENOMEM);
2051 sc->ctts_data = ctts_data;
2052 }
2053 dts = st->duration;
2054 offset = frag->base_data_offset + data_offset;
2055 distance = 0;
2056 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2057 for (i = 0; i < entries; i++) {
2058 unsigned sample_size = frag->size;
2059 int sample_flags = i ? frag->flags : first_sample_flags;
2060 unsigned sample_duration = frag->duration;
2061 int keyframe;
2062
2063 if (flags & 0x100) sample_duration = get_be32(pb);
2064 if (flags & 0x200) sample_size = get_be32(pb);
2065 if (flags & 0x400) sample_flags = get_be32(pb);
2066 if (flags & 0x800) {
2067 sc->ctts_data[sc->ctts_count].count = 1;
2068 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
2069 sc->ctts_count++;
2070 }
2071 if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2072 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2073 distance = 0;
2074 av_add_index_entry(st, offset, dts, sample_size, distance,
2075 keyframe ? AVINDEX_KEYFRAME : 0);
2076 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2077 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2078 offset, dts, sample_size, distance, keyframe);
2079 distance++;
2080 dts += sample_duration;
2081 offset += sample_size;
2082 }
2083 frag->moof_offset = offset;
2084 st->duration = dts;
2085 return 0;
2086 }
2087
2088 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2089 /* like the files created with Adobe Premiere 5.0, for samples see */
2090 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2091 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2092 {
2093 int err;
2094
2095 if (atom.size < 8)
2096 return 0; /* continue */
2097 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2098 url_fskip(pb, atom.size - 4);
2099 return 0;
2100 }
2101 atom.type = get_le32(pb);
2102 atom.size -= 8;
2103 if (atom.type != MKTAG('m','d','a','t')) {
2104 url_fskip(pb, atom.size);
2105 return 0;
2106 }
2107 err = mov_read_mdat(c, pb, atom);
2108 return err;
2109 }
2110
2111 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2112 {
2113 #if CONFIG_ZLIB
2114 ByteIOContext ctx;
2115 uint8_t *cmov_data;
2116 uint8_t *moov_data; /* uncompressed data */
2117 long cmov_len, moov_len;
2118 int ret = -1;
2119
2120 get_be32(pb); /* dcom atom */
2121 if (get_le32(pb) != MKTAG('d','c','o','m'))
2122 return -1;
2123 if (get_le32(pb) != MKTAG('z','l','i','b')) {
2124 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2125 return -1;
2126 }
2127 get_be32(pb); /* cmvd atom */
2128 if (get_le32(pb) != MKTAG('c','m','v','d'))
2129 return -1;
2130 moov_len = get_be32(pb); /* uncompressed size */
2131 cmov_len = atom.size - 6 * 4;
2132
2133 cmov_data = av_malloc(cmov_len);
2134 if (!cmov_data)
2135 return AVERROR(ENOMEM);
2136 moov_data = av_malloc(moov_len);
2137 if (!moov_data) {
2138 av_free(cmov_data);
2139 return AVERROR(ENOMEM);
2140 }
2141 get_buffer(pb, cmov_data, cmov_len);
2142 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2143 goto free_and_return;
2144 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2145 goto free_and_return;
2146 atom.type = MKTAG('m','o','o','v');
2147 atom.size = moov_len;
2148 #ifdef DEBUG
2149 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2150 #endif
2151 ret = mov_read_default(c, &ctx, atom);
2152 free_and_return:
2153 av_free(moov_data);
2154 av_free(cmov_data);
2155 return ret;
2156 #else
2157 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2158 return -1;
2159 #endif
2160 }
2161
2162 /* edit list atom */
2163 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2164 {
2165 MOVStreamContext *sc;
2166 int i, edit_count;
2167
2168 if (c->fc->nb_streams < 1)
2169 return 0;
2170 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2171
2172 get_byte(pb); /* version */
2173 get_be24(pb); /* flags */
2174 edit_count = get_be32(pb); /* entries */
2175
2176 if((uint64_t)edit_count*12+8 > atom.size)
2177 return -1;
2178
2179 for(i=0; i<edit_count; i++){
2180 int time;
2181 int duration = get_be32(pb); /* Track duration */
2182 time = get_be32(pb); /* Media time */
2183 get_be32(pb); /* Media rate */
2184 if (i == 0 && time >= -1) {
2185 sc->time_offset = time != -1 ? time : -duration;
2186 }
2187 }
2188
2189 if(edit_count > 1)
2190 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2191 "a/v desync might occur, patch welcome\n");
2192
2193 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2194 return 0;
2195 }
2196
2197 static const MOVParseTableEntry mov_default_parse_table[] = {
2198 { MKTAG('a','v','s','s'), mov_read_extradata },
2199 { MKTAG('c','h','p','l'), mov_read_chpl },
2200 { MKTAG('c','o','6','4'), mov_read_stco },
2201 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2202 { MKTAG('d','i','n','f'), mov_read_default },
2203 { MKTAG('d','r','e','f'), mov_read_dref },
2204 { MKTAG('e','d','t','s'), mov_read_default },
2205 { MKTAG('e','l','s','t'), mov_read_elst },
2206 { MKTAG('e','n','d','a'), mov_read_enda },
2207 { MKTAG('f','i','e','l'), mov_read_extradata },
2208 { MKTAG('f','t','y','p'), mov_read_ftyp },
2209 { MKTAG('g','l','b','l'), mov_read_glbl },
2210 { MKTAG('h','d','l','r'), mov_read_hdlr },
2211 { MKTAG('i','l','s','t'), mov_read_ilst },
2212 { MKTAG('j','p','2','h'), mov_read_extradata },
2213 { MKTAG('m','d','a','t'), mov_read_mdat },
2214 { MKTAG('m','d','h','d'), mov_read_mdhd },
2215 { MKTAG('m','d','i','a'), mov_read_default },
2216 { MKTAG('m','e','t','a'), mov_read_meta },
2217 { MKTAG('m','i','n','f'), mov_read_default },
2218 { MKTAG('m','o','o','f'), mov_read_moof },
2219 { MKTAG('m','o','o','v'), mov_read_moov },
2220 { MKTAG('m','v','e','x'), mov_read_default },
2221 { MKTAG('m','v','h','d'), mov_read_mvhd },
2222 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2223 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2224 { MKTAG('a','v','c','C'), mov_read_glbl },
2225 { MKTAG('p','a','s','p'), mov_read_pasp },
2226 { MKTAG('s','t','b','l'), mov_read_default },
2227 { MKTAG('s','t','c','o'), mov_read_stco },
2228 { MKTAG('s','t','p','s'), mov_read_stps },
2229 { MKTAG('s','t','r','f'), mov_read_strf },
2230 { MKTAG('s','t','s','c'), mov_read_stsc },
2231 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2232 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2233 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2234 { MKTAG('s','t','t','s'), mov_read_stts },
2235 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2236 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2237 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2238 { MKTAG('t','r','a','k'), mov_read_trak },
2239 { MKTAG('t','r','a','f'), mov_read_default },
2240 { MKTAG('t','r','e','f'), mov_read_default },
2241 { MKTAG('c','h','a','p'), mov_read_chap },
2242 { MKTAG('t','r','e','x'), mov_read_trex },
2243 { MKTAG('t','r','u','n'), mov_read_trun },
2244 { MKTAG('u','d','t','a'), mov_read_default },
2245 { MKTAG('w','a','v','e'), mov_read_wave },
2246 { MKTAG('e','s','d','s'), mov_read_esds },
2247 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2248 { MKTAG('c','m','o','v'), mov_read_cmov },
2249 { 0, NULL }
2250 };
2251
2252 static int mov_probe(AVProbeData *p)
2253 {
2254 unsigned int offset;
2255 uint32_t tag;
2256 int score = 0;
2257
2258 /* check file header */
2259 offset = 0;
2260 for(;;) {
2261 /* ignore invalid offset */
2262 if ((offset + 8) > (unsigned int)p->buf_size)
2263 return score;
2264 tag = AV_RL32(p->buf + offset + 4);
2265 switch(tag) {
2266 /* check for obvious tags */
2267 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2268 case MKTAG('m','o','o','v'):
2269 case MKTAG('m','d','a','t'):
2270 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2271 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2272 case MKTAG('f','t','y','p'):
2273 return AVPROBE_SCORE_MAX;
2274 /* those are more common words, so rate then a bit less */
2275 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2276 case MKTAG('w','i','d','e'):
2277 case MKTAG('f','r','e','e'):
2278 case MKTAG('j','u','n','k'):
2279 case MKTAG('p','i','c','t'):
2280 return AVPROBE_SCORE_MAX - 5;
2281 case MKTAG(0x82,0x82,0x7f,0x7d):
2282 case MKTAG('s','k','i','p'):
2283 case MKTAG('u','u','i','d'):
2284 case MKTAG('p','r','f','l'):
2285 offset = AV_RB32(p->buf+offset) + offset;
2286 /* if we only find those cause probedata is too small at least rate them */
2287 score = AVPROBE_SCORE_MAX - 50;
2288 break;
2289 default:
2290 /* unrecognized tag */
2291 return score;
2292 }
2293 }
2294 return score;
2295 }
2296
2297 // must be done after parsing all trak because there's no order requirement
2298 static void mov_read_chapters(AVFormatContext *s)
2299 {
2300 MOVContext *mov = s->priv_data;
2301 AVStream *st = NULL;
2302 MOVStreamContext *sc;
2303 int64_t cur_pos;
2304 uint8_t *title = NULL;
2305 int i, len, i8, i16;
2306
2307 for (i = 0; i < s->nb_streams; i++)
2308 if (s->streams[i]->id == mov->chapter_track) {
2309 st = s->streams[i];
2310 break;
2311 }
2312 if (!st) {
2313 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2314 return;
2315 }
2316
2317 st->discard = AVDISCARD_ALL;
2318 sc = st->priv_data;
2319 cur_pos = url_ftell(sc->pb);
2320
2321 for (i = 0; i < st->nb_index_entries; i++) {
2322 AVIndexEntry *sample = &st->index_entries[i];
2323 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2324
2325 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2326 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2327 goto finish;
2328 }
2329
2330 title = av_malloc(sample->size+2);
2331 get_buffer(sc->pb, title, sample->size);
2332
2333 // the first two bytes are the length of the title
2334 len = AV_RB16(title);
2335 if (len > sample->size-2)
2336 continue;
2337
2338 // The samples could theoretically be in any encoding if there's an encd
2339 // atom following, but in practice are only utf-8 or utf-16, distinguished
2340 // instead by the presence of a BOM
2341 if (AV_RB16(title+2) == 0xfeff) {
2342 uint8_t *utf8 = av_malloc(2*len+3);
2343
2344 i8 = i16 = 0;
2345 while (i16 < len) {
2346 uint32_t ch;
2347 uint8_t tmp;
2348 GET_UTF16(ch, i16 < len ? AV_RB16(title + (i16+=2)) : 0, break;)
2349 PUT_UTF8(ch, tmp, if (i8 < 2*len) utf8[2+i8++] = tmp;)
2350 }
2351 utf8[2+i8] = 0;
2352 av_freep(&title);
2353 title = utf8;
2354 }
2355
2356 ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title+2);
2357 av_freep(&title);
2358 }
2359 finish:
2360 av_free(title);
2361 url_fseek(sc->pb, cur_pos, SEEK_SET);
2362 }
2363
2364 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2365 {
2366 MOVContext *mov = s->priv_data;
2367 ByteIOContext *pb = s->pb;
2368 int err;
2369 MOVAtom atom = { AV_RL32("root") };
2370
2371 mov->fc = s;
2372 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2373 if(!url_is_streamed(pb))
2374 atom.size = url_fsize(pb);
2375 else
2376 atom.size = INT64_MAX;
2377
2378 /* check MOV header */
2379 if ((err = mov_read_default(mov, pb, atom)) < 0) {
2380 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2381 return err;
2382 }
2383 if (!mov->found_moov) {
2384 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2385 return -1;
2386 }
2387 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2388
2389 if (!url_is_streamed(pb) && mov->chapter_track > 0)
2390 mov_read_chapters(s);
2391
2392 return 0;
2393 }
2394
2395 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2396 {
2397 AVIndexEntry *sample = NULL;
2398 int64_t best_dts = INT64_MAX;
2399 int i;
2400 for (i = 0; i < s->nb_streams; i++) {
2401 AVStream *avst = s->streams[i];
2402 MOVStreamContext *msc = avst->priv_data;
2403 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2404 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2405 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2406 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2407 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2408 (!url_is_streamed(s->pb) &&
2409 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2410 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2411 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2412 sample = current_sample;
2413 best_dts = dts;
2414 *st = avst;
2415 }
2416 }
2417 }
2418 return sample;
2419 }
2420
2421 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2422 {
2423 MOVContext *mov = s->priv_data;
2424 MOVStreamContext *sc;
2425 AVIndexEntry *sample;
2426 AVStream *st = NULL;
2427 int ret;
2428 retry:
2429 sample = mov_find_next_sample(s, &st);
2430 if (!sample) {
2431 mov->found_mdat = 0;
2432 if (!url_is_streamed(s->pb) ||
2433 mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2434 url_feof(s->pb))
2435 return AVERROR_EOF;
2436 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2437 goto retry;
2438 }
2439 sc = st->priv_data;
2440 /* must be done just before reading, to avoid infinite loop on sample */
2441 sc->current_sample++;
2442
2443 if (st->discard != AVDISCARD_ALL) {
2444 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2445 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2446 sc->ffindex, sample->pos);
2447 return -1;
2448 }
2449 ret = av_get_packet(sc->pb, pkt, sample->size);
2450 if (ret < 0)
2451 return ret;
2452 #if CONFIG_DV_DEMUXER
2453 if (mov->dv_demux && sc->dv_audio_container) {
2454 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2455 av_free(pkt->data);
2456 pkt->size = 0;
2457 ret = dv_get_packet(mov->dv_demux, pkt);
2458 if (ret < 0)
2459 return ret;
2460 }
2461 #endif
2462 }
2463
2464 pkt->stream_index = sc->ffindex;
2465 pkt->dts = sample->timestamp;
2466 if (sc->ctts_data) {
2467 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2468 /* update ctts context */
2469 sc->ctts_sample++;
2470 if (sc->ctts_index < sc->ctts_count &&
2471 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2472 sc->ctts_index++;
2473 sc->ctts_sample = 0;
2474 }
2475 if (sc->wrong_dts)
2476 pkt->dts = AV_NOPTS_VALUE;
2477 } else {
2478 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2479 st->index_entries[sc->current_sample].timestamp : st->duration;
2480 pkt->duration = next_dts - pkt->dts;
2481 pkt->pts = pkt->dts;
2482 }
2483 if (st->discard == AVDISCARD_ALL)
2484 goto retry;
2485 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2486 pkt->pos = sample->pos;
2487 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2488 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2489 return 0;
2490 }
2491
2492 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2493 {
2494 MOVStreamContext *sc = st->priv_data;
2495 int sample, time_sample;
2496 int i;
2497
2498 sample = av_index_search_timestamp(st, timestamp, flags);
2499 dprintf(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2500 if (sample < 0) /* not sure what to do */
2501 return -1;
2502 sc->current_sample = sample;
2503 dprintf(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2504 /* adjust ctts index */
2505 if (sc->ctts_data) {
2506 time_sample = 0;
2507 for (i = 0; i < sc->ctts_count; i++) {
2508 int next = time_sample + sc->ctts_data[i].count;
2509 if (next > sc->current_sample) {
2510 sc->ctts_index = i;
2511 sc->ctts_sample = sc->current_sample - time_sample;
2512 break;
2513 }
2514 time_sample = next;
2515 }
2516 }
2517 return sample;
2518 }
2519
2520 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2521 {
2522 AVStream *st;
2523 int64_t seek_timestamp, timestamp;
2524 int sample;
2525 int i;
2526
2527 if (stream_index >= s->nb_streams)
2528 return -1;
2529 if (sample_time < 0)
2530 sample_time = 0;
2531
2532 st = s->streams[stream_index];
2533 sample = mov_seek_stream(s, st, sample_time, flags);
2534 if (sample < 0)
2535 return -1;
2536
2537 /* adjust seek timestamp to found sample timestamp */
2538 seek_timestamp = st->index_entries[sample].timestamp;
2539
2540 for (i = 0; i < s->nb_streams; i++) {
2541 st = s->streams[i];
2542 if (stream_index == i)
2543 continue;
2544
2545 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2546 mov_seek_stream(s, st, timestamp, flags);
2547 }
2548 return 0;
2549 }
2550
2551 static int mov_read_close(AVFormatContext *s)
2552 {
2553 MOVContext *mov = s->priv_data;
2554 int i, j;
2555
2556 for (i = 0; i < s->nb_streams; i++) {
2557 AVStream *st = s->streams[i];
2558 MOVStreamContext *sc = st->priv_data;
2559
2560 av_freep(&sc->ctts_data);
2561 for (j = 0; j < sc->drefs_count; j++) {
2562 av_freep(&sc->drefs[j].path);
2563 av_freep(&sc->drefs[j].dir);
2564 }
2565 av_freep(&sc->drefs);
2566 if (sc->pb && sc->pb != s->pb)
2567 url_fclose(sc->pb);
2568
2569 av_freep(&st->codec->palctrl);
2570 }
2571
2572 if (mov->dv_demux) {
2573 for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2574 av_freep(&mov->dv_fctx->streams[i]->codec);
2575 av_freep(&mov->dv_fctx->streams[i]);
2576 }
2577 av_freep(&mov->dv_fctx);
2578 av_freep(&mov->dv_demux);
2579 }
2580
2581 av_freep(&mov->trex_data);
2582
2583 return 0;
2584 }
2585
2586 AVInputFormat mov_demuxer = {
2587 "mov,mp4,m4a,3gp,3g2,mj2",
2588 NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2589 sizeof(MOVContext),
2590 mov_probe,
2591 mov_read_header,
2592 mov_read_packet,
2593 mov_read_close,
2594 mov_read_seek,
2595 };