avio: avio_ prefixes for get_* functions
[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 "avio_internal.h"
33 #include "riff.h"
34 #include "isom.h"
35 #include "libavcodec/get_bits.h"
36
37 #if CONFIG_ZLIB
38 #include <zlib.h>
39 #endif
40
41 /*
42 * First version by Francois Revol revol@free.fr
43 * Seek function by Gael Chardon gael.dev@4now.net
44 *
45 * Features and limitations:
46 * - reads most of the QT files I have (at least the structure),
47 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
48 * - the code is quite ugly... maybe I won't do it recursive next time :-)
49 *
50 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
51 * when coding this :) (it's a writer anyway)
52 *
53 * Reference documents:
54 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
55 * Apple:
56 * http://developer.apple.com/documentation/QuickTime/QTFF/
57 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
58 * QuickTime is a trademark of Apple (AFAIK :))
59 */
60
61 #include "qtpalette.h"
62
63
64 #undef NDEBUG
65 #include <assert.h>
66
67 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
68
69 /* those functions parse an atom */
70 /* return code:
71 0: continue to parse next atom
72 <0: error occurred, exit
73 */
74 /* links atom IDs to parse functions */
75 typedef struct MOVParseTableEntry {
76 uint32_t type;
77 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
78 } MOVParseTableEntry;
79
80 static const MOVParseTableEntry mov_default_parse_table[];
81
82 static int mov_metadata_trkn(MOVContext *c, AVIOContext *pb, unsigned len)
83 {
84 char buf[16];
85
86 avio_rb16(pb); // unknown
87 snprintf(buf, sizeof(buf), "%d", avio_rb16(pb));
88 av_metadata_set2(&c->fc->metadata, "track", buf, 0);
89
90 avio_rb16(pb); // total tracks
91
92 return 0;
93 }
94
95 static const uint32_t mac_to_unicode[128] = {
96 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
97 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
98 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
99 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
100 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
101 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
102 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
103 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
104 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
105 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
106 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
107 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
108 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
109 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
110 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
111 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
112 };
113
114 static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
115 char *dst, int dstlen)
116 {
117 char *p = dst;
118 char *end = dst+dstlen-1;
119 int i;
120
121 for (i = 0; i < len; i++) {
122 uint8_t t, c = avio_r8(pb);
123 if (c < 0x80 && p < end)
124 *p++ = c;
125 else
126 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
127 }
128 *p = 0;
129 return p - dst;
130 }
131
132 static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
133 {
134 #ifdef MOV_EXPORT_ALL_METADATA
135 char tmp_key[5];
136 #endif
137 char str[1024], key2[16], language[4] = {0};
138 const char *key = NULL;
139 uint16_t str_size, langcode = 0;
140 uint32_t data_type = 0;
141 int (*parse)(MOVContext*, AVIOContext*, unsigned) = NULL;
142
143 switch (atom.type) {
144 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
145 case MKTAG(0xa9,'a','u','t'):
146 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
147 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
148 case MKTAG( 'c','p','r','t'):
149 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
150 case MKTAG(0xa9,'c','m','t'):
151 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
152 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
153 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
154 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
155 case MKTAG(0xa9,'t','o','o'):
156 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
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 = avio_rb32(pb);
169 int tag = avio_rl32(pb);
170 if (tag == MKTAG('d','a','t','a')) {
171 data_type = avio_rb32(pb); // type
172 avio_rb32(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 = avio_rb16(pb); // string length
178 langcode = avio_rb16(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 avio_read(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, AVIOContext *pb, MOVAtom atom)
223 {
224 int64_t start;
225 int i, nb_chapters, str_len, version;
226 char str[256+1];
227
228 if ((atom.size -= 5) < 0)
229 return 0;
230
231 version = avio_r8(pb);
232 avio_rb24(pb);
233 if (version)
234 avio_rb32(pb); // ???
235 nb_chapters = avio_r8(pb);
236
237 for (i = 0; i < nb_chapters; i++) {
238 if (atom.size < 9)
239 return 0;
240
241 start = avio_rb64(pb);
242 str_len = avio_r8(pb);
243
244 if ((atom.size -= 9+str_len) < 0)
245 return 0;
246
247 avio_read(pb, str, str_len);
248 str[str_len] = 0;
249 ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
250 }
251 return 0;
252 }
253
254 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
255 {
256 int64_t total_size = 0;
257 MOVAtom a;
258 int i;
259
260 if (atom.size < 0)
261 atom.size = INT64_MAX;
262 while (total_size + 8 < atom.size && !url_feof(pb)) {
263 int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
264 a.size = atom.size;
265 a.type=0;
266 if(atom.size >= 8) {
267 a.size = avio_rb32(pb);
268 a.type = avio_rl32(pb);
269 }
270 av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
271 a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
272 total_size += 8;
273 if (a.size == 1) { /* 64 bit extended size */
274 a.size = avio_rb64(pb) - 8;
275 total_size += 8;
276 }
277 if (a.size == 0) {
278 a.size = atom.size - total_size;
279 if (a.size <= 8)
280 break;
281 }
282 a.size -= 8;
283 if(a.size < 0)
284 break;
285 a.size = FFMIN(a.size, atom.size - total_size);
286
287 for (i = 0; mov_default_parse_table[i].type; i++)
288 if (mov_default_parse_table[i].type == a.type) {
289 parse = mov_default_parse_table[i].parse;
290 break;
291 }
292
293 // container is user data
294 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
295 atom.type == MKTAG('i','l','s','t')))
296 parse = mov_read_udta_string;
297
298 if (!parse) { /* skip leaf atoms data */
299 url_fskip(pb, a.size);
300 } else {
301 int64_t start_pos = url_ftell(pb);
302 int64_t left;
303 int err = parse(c, pb, a);
304 if (err < 0)
305 return err;
306 if (c->found_moov && c->found_mdat &&
307 (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
308 return 0;
309 left = a.size - url_ftell(pb) + start_pos;
310 if (left > 0) /* skip garbage at atom end */
311 url_fskip(pb, left);
312 }
313
314 total_size += a.size;
315 }
316
317 if (total_size < atom.size && atom.size < 0x7ffff)
318 url_fskip(pb, atom.size - total_size);
319
320 return 0;
321 }
322
323 static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
324 {
325 AVStream *st;
326 MOVStreamContext *sc;
327 int entries, i, j;
328
329 if (c->fc->nb_streams < 1)
330 return 0;
331 st = c->fc->streams[c->fc->nb_streams-1];
332 sc = st->priv_data;
333
334 avio_rb32(pb); // version + flags
335 entries = avio_rb32(pb);
336 if (entries >= UINT_MAX / sizeof(*sc->drefs))
337 return -1;
338 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
339 if (!sc->drefs)
340 return AVERROR(ENOMEM);
341 sc->drefs_count = entries;
342
343 for (i = 0; i < sc->drefs_count; i++) {
344 MOVDref *dref = &sc->drefs[i];
345 uint32_t size = avio_rb32(pb);
346 int64_t next = url_ftell(pb) + size - 4;
347
348 if (size < 12)
349 return -1;
350
351 dref->type = avio_rl32(pb);
352 avio_rb32(pb); // version + flags
353 av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
354
355 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
356 /* macintosh alias record */
357 uint16_t volume_len, len;
358 int16_t type;
359
360 url_fskip(pb, 10);
361
362 volume_len = avio_r8(pb);
363 volume_len = FFMIN(volume_len, 27);
364 avio_read(pb, dref->volume, 27);
365 dref->volume[volume_len] = 0;
366 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
367
368 url_fskip(pb, 12);
369
370 len = avio_r8(pb);
371 len = FFMIN(len, 63);
372 avio_read(pb, dref->filename, 63);
373 dref->filename[len] = 0;
374 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
375
376 url_fskip(pb, 16);
377
378 /* read next level up_from_alias/down_to_target */
379 dref->nlvl_from = avio_rb16(pb);
380 dref->nlvl_to = avio_rb16(pb);
381 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
382 dref->nlvl_from, dref->nlvl_to);
383
384 url_fskip(pb, 16);
385
386 for (type = 0; type != -1 && url_ftell(pb) < next; ) {
387 type = avio_rb16(pb);
388 len = avio_rb16(pb);
389 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
390 if (len&1)
391 len += 1;
392 if (type == 2) { // absolute path
393 av_free(dref->path);
394 dref->path = av_mallocz(len+1);
395 if (!dref->path)
396 return AVERROR(ENOMEM);
397 avio_read(pb, dref->path, len);
398 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
399 len -= volume_len;
400 memmove(dref->path, dref->path+volume_len, len);
401 dref->path[len] = 0;
402 }
403 for (j = 0; j < len; j++)
404 if (dref->path[j] == ':')
405 dref->path[j] = '/';
406 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
407 } else if (type == 0) { // directory name
408 av_free(dref->dir);
409 dref->dir = av_malloc(len+1);
410 if (!dref->dir)
411 return AVERROR(ENOMEM);
412 avio_read(pb, dref->dir, len);
413 dref->dir[len] = 0;
414 for (j = 0; j < len; j++)
415 if (dref->dir[j] == ':')
416 dref->dir[j] = '/';
417 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
418 } else
419 url_fskip(pb, len);
420 }
421 }
422 url_fseek(pb, next, SEEK_SET);
423 }
424 return 0;
425 }
426
427 static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
428 {
429 AVStream *st;
430 uint32_t type;
431 uint32_t ctype;
432
433 if (c->fc->nb_streams < 1) // meta before first trak
434 return 0;
435
436 st = c->fc->streams[c->fc->nb_streams-1];
437
438 avio_r8(pb); /* version */
439 avio_rb24(pb); /* flags */
440
441 /* component type */
442 ctype = avio_rl32(pb);
443 type = avio_rl32(pb); /* component subtype */
444
445 av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
446 av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
447
448 if (type == MKTAG('v','i','d','e'))
449 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
450 else if(type == MKTAG('s','o','u','n'))
451 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
452 else if(type == MKTAG('m','1','a',' '))
453 st->codec->codec_id = CODEC_ID_MP2;
454 else if(type == MKTAG('s','u','b','p'))
455 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
456
457 avio_rb32(pb); /* component manufacture */
458 avio_rb32(pb); /* component flags */
459 avio_rb32(pb); /* component flags mask */
460
461 return 0;
462 }
463
464 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
465 {
466 AVStream *st;
467 int tag, len;
468
469 if (fc->nb_streams < 1)
470 return 0;
471 st = fc->streams[fc->nb_streams-1];
472
473 avio_rb32(pb); /* version + flags */
474 len = ff_mp4_read_descr(fc, pb, &tag);
475 if (tag == MP4ESDescrTag) {
476 avio_rb16(pb); /* ID */
477 avio_r8(pb); /* priority */
478 } else
479 avio_rb16(pb); /* ID */
480
481 len = ff_mp4_read_descr(fc, pb, &tag);
482 if (tag == MP4DecConfigDescrTag)
483 ff_mp4_read_dec_config_descr(fc, st, pb);
484 return 0;
485 }
486
487 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
488 {
489 return ff_mov_read_esds(c->fc, pb, atom);
490 }
491
492 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
493 {
494 AVStream *st;
495 int ac3info, acmod, lfeon;
496
497 if (c->fc->nb_streams < 1)
498 return 0;
499 st = c->fc->streams[c->fc->nb_streams-1];
500
501 ac3info = avio_rb24(pb);
502 acmod = (ac3info >> 11) & 0x7;
503 lfeon = (ac3info >> 10) & 0x1;
504 st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
505
506 return 0;
507 }
508
509 static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
510 {
511 const int num = avio_rb32(pb);
512 const int den = avio_rb32(pb);
513 AVStream *st;
514
515 if (c->fc->nb_streams < 1)
516 return 0;
517 st = c->fc->streams[c->fc->nb_streams-1];
518
519 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
520 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
521 av_log(c->fc, AV_LOG_WARNING,
522 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
523 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
524 num, den);
525 } else if (den != 0) {
526 st->sample_aspect_ratio.num = num;
527 st->sample_aspect_ratio.den = den;
528 }
529 return 0;
530 }
531
532 /* this atom contains actual media data */
533 static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
534 {
535 if(atom.size == 0) /* wrong one (MP4) */
536 return 0;
537 c->found_mdat=1;
538 return 0; /* now go for moov */
539 }
540
541 /* read major brand, minor version and compatible brands and store them as metadata */
542 static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
543 {
544 uint32_t minor_ver;
545 int comp_brand_size;
546 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
547 char* comp_brands_str;
548 uint8_t type[5] = {0};
549
550 avio_read(pb, type, 4);
551 if (strcmp(type, "qt "))
552 c->isom = 1;
553 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
554 av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
555 minor_ver = avio_rb32(pb); /* minor version */
556 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
557 av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
558
559 comp_brand_size = atom.size - 8;
560 if (comp_brand_size < 0)
561 return -1;
562 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
563 if (!comp_brands_str)
564 return AVERROR(ENOMEM);
565 avio_read(pb, comp_brands_str, comp_brand_size);
566 comp_brands_str[comp_brand_size] = 0;
567 av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
568 av_freep(&comp_brands_str);
569
570 return 0;
571 }
572
573 /* this atom should contain all header atoms */
574 static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
575 {
576 if (mov_read_default(c, pb, atom) < 0)
577 return -1;
578 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
579 /* so we don't parse the whole file if over a network */
580 c->found_moov=1;
581 return 0; /* now go for mdat */
582 }
583
584 static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
585 {
586 c->fragment.moof_offset = url_ftell(pb) - 8;
587 av_dlog(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
588 return mov_read_default(c, pb, atom);
589 }
590
591 static void mov_metadata_creation_time(AVMetadata **metadata, time_t time)
592 {
593 char buffer[32];
594 if (time) {
595 struct tm *ptm;
596 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
597 ptm = gmtime(&time);
598 if (!ptm) return;
599 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
600 av_metadata_set2(metadata, "creation_time", buffer, 0);
601 }
602 }
603
604 static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
605 {
606 AVStream *st;
607 MOVStreamContext *sc;
608 int version;
609 char language[4] = {0};
610 unsigned lang;
611 time_t creation_time;
612
613 if (c->fc->nb_streams < 1)
614 return 0;
615 st = c->fc->streams[c->fc->nb_streams-1];
616 sc = st->priv_data;
617
618 version = avio_r8(pb);
619 if (version > 1)
620 return -1; /* unsupported */
621
622 avio_rb24(pb); /* flags */
623 if (version == 1) {
624 creation_time = avio_rb64(pb);
625 avio_rb64(pb);
626 } else {
627 creation_time = avio_rb32(pb);
628 avio_rb32(pb); /* modification time */
629 }
630 mov_metadata_creation_time(&st->metadata, creation_time);
631
632 sc->time_scale = avio_rb32(pb);
633 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
634
635 lang = avio_rb16(pb); /* language */
636 if (ff_mov_lang_to_iso639(lang, language))
637 av_metadata_set2(&st->metadata, "language", language, 0);
638 avio_rb16(pb); /* quality */
639
640 return 0;
641 }
642
643 static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
644 {
645 time_t creation_time;
646 int version = avio_r8(pb); /* version */
647 avio_rb24(pb); /* flags */
648
649 if (version == 1) {
650 creation_time = avio_rb64(pb);
651 avio_rb64(pb);
652 } else {
653 creation_time = avio_rb32(pb);
654 avio_rb32(pb); /* modification time */
655 }
656 mov_metadata_creation_time(&c->fc->metadata, creation_time);
657 c->time_scale = avio_rb32(pb); /* time scale */
658
659 av_dlog(c->fc, "time scale = %i\n", c->time_scale);
660
661 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
662 avio_rb32(pb); /* preferred scale */
663
664 avio_rb16(pb); /* preferred volume */
665
666 url_fskip(pb, 10); /* reserved */
667
668 url_fskip(pb, 36); /* display matrix */
669
670 avio_rb32(pb); /* preview time */
671 avio_rb32(pb); /* preview duration */
672 avio_rb32(pb); /* poster time */
673 avio_rb32(pb); /* selection time */
674 avio_rb32(pb); /* selection duration */
675 avio_rb32(pb); /* current time */
676 avio_rb32(pb); /* next track ID */
677
678 return 0;
679 }
680
681 static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
682 {
683 AVStream *st;
684
685 if (c->fc->nb_streams < 1)
686 return 0;
687 st = c->fc->streams[c->fc->nb_streams-1];
688
689 if((uint64_t)atom.size > (1<<30))
690 return -1;
691
692 // currently SVQ3 decoder expect full STSD header - so let's fake it
693 // this should be fixed and just SMI header should be passed
694 av_free(st->codec->extradata);
695 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
696 if (!st->codec->extradata)
697 return AVERROR(ENOMEM);
698 st->codec->extradata_size = 0x5a + atom.size;
699 memcpy(st->codec->extradata, "SVQ3", 4); // fake
700 avio_read(pb, st->codec->extradata + 0x5a, atom.size);
701 av_dlog(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
702 return 0;
703 }
704
705 static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
706 {
707 AVStream *st;
708 int little_endian;
709
710 if (c->fc->nb_streams < 1)
711 return 0;
712 st = c->fc->streams[c->fc->nb_streams-1];
713
714 little_endian = avio_rb16(pb);
715 av_dlog(c->fc, "enda %d\n", little_endian);
716 if (little_endian == 1) {
717 switch (st->codec->codec_id) {
718 case CODEC_ID_PCM_S24BE:
719 st->codec->codec_id = CODEC_ID_PCM_S24LE;
720 break;
721 case CODEC_ID_PCM_S32BE:
722 st->codec->codec_id = CODEC_ID_PCM_S32LE;
723 break;
724 case CODEC_ID_PCM_F32BE:
725 st->codec->codec_id = CODEC_ID_PCM_F32LE;
726 break;
727 case CODEC_ID_PCM_F64BE:
728 st->codec->codec_id = CODEC_ID_PCM_F64LE;
729 break;
730 default:
731 break;
732 }
733 }
734 return 0;
735 }
736
737 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
738 static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
739 {
740 AVStream *st;
741 uint64_t size;
742 uint8_t *buf;
743
744 if (c->fc->nb_streams < 1) // will happen with jp2 files
745 return 0;
746 st= c->fc->streams[c->fc->nb_streams-1];
747 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
748 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
749 return -1;
750 buf= av_realloc(st->codec->extradata, size);
751 if(!buf)
752 return -1;
753 st->codec->extradata= buf;
754 buf+= st->codec->extradata_size;
755 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
756 AV_WB32( buf , atom.size + 8);
757 AV_WL32( buf + 4, atom.type);
758 avio_read(pb, buf + 8, atom.size);
759 return 0;
760 }
761
762 static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
763 {
764 AVStream *st;
765
766 if (c->fc->nb_streams < 1)
767 return 0;
768 st = c->fc->streams[c->fc->nb_streams-1];
769
770 if((uint64_t)atom.size > (1<<30))
771 return -1;
772
773 if (st->codec->codec_id == CODEC_ID_QDM2 || st->codec->codec_id == CODEC_ID_QDMC) {
774 // pass all frma atom to codec, needed at least for QDMC and QDM2
775 av_free(st->codec->extradata);
776 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
777 if (!st->codec->extradata)
778 return AVERROR(ENOMEM);
779 st->codec->extradata_size = atom.size;
780 avio_read(pb, st->codec->extradata, atom.size);
781 } else if (atom.size > 8) { /* to read frma, esds atoms */
782 if (mov_read_default(c, pb, atom) < 0)
783 return -1;
784 } else
785 url_fskip(pb, atom.size);
786 return 0;
787 }
788
789 /**
790 * This function reads atom content and puts data in extradata without tag
791 * nor size unlike mov_read_extradata.
792 */
793 static int mov_read_glbl(MOVContext *c, AVIOContext *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 av_free(st->codec->extradata);
805 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
806 if (!st->codec->extradata)
807 return AVERROR(ENOMEM);
808 st->codec->extradata_size = atom.size;
809 avio_read(pb, st->codec->extradata, atom.size);
810 return 0;
811 }
812
813 /**
814 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
815 * but can have extradata appended at the end after the 40 bytes belonging
816 * to the struct.
817 */
818 static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
819 {
820 AVStream *st;
821
822 if (c->fc->nb_streams < 1)
823 return 0;
824 if (atom.size <= 40)
825 return 0;
826 st = c->fc->streams[c->fc->nb_streams-1];
827
828 if((uint64_t)atom.size > (1<<30))
829 return -1;
830
831 av_free(st->codec->extradata);
832 st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
833 if (!st->codec->extradata)
834 return AVERROR(ENOMEM);
835 st->codec->extradata_size = atom.size - 40;
836 url_fskip(pb, 40);
837 avio_read(pb, st->codec->extradata, atom.size - 40);
838 return 0;
839 }
840
841 static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
842 {
843 AVStream *st;
844 MOVStreamContext *sc;
845 unsigned int i, entries;
846
847 if (c->fc->nb_streams < 1)
848 return 0;
849 st = c->fc->streams[c->fc->nb_streams-1];
850 sc = st->priv_data;
851
852 avio_r8(pb); /* version */
853 avio_rb24(pb); /* flags */
854
855 entries = avio_rb32(pb);
856
857 if(entries >= UINT_MAX/sizeof(int64_t))
858 return -1;
859
860 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
861 if (!sc->chunk_offsets)
862 return AVERROR(ENOMEM);
863 sc->chunk_count = entries;
864
865 if (atom.type == MKTAG('s','t','c','o'))
866 for(i=0; i<entries; i++)
867 sc->chunk_offsets[i] = avio_rb32(pb);
868 else if (atom.type == MKTAG('c','o','6','4'))
869 for(i=0; i<entries; i++)
870 sc->chunk_offsets[i] = avio_rb64(pb);
871 else
872 return -1;
873
874 return 0;
875 }
876
877 /**
878 * Compute codec id for 'lpcm' tag.
879 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
880 */
881 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
882 {
883 if (flags & 1) { // floating point
884 if (flags & 2) { // big endian
885 if (bps == 32) return CODEC_ID_PCM_F32BE;
886 else if (bps == 64) return CODEC_ID_PCM_F64BE;
887 } else {
888 if (bps == 32) return CODEC_ID_PCM_F32LE;
889 else if (bps == 64) return CODEC_ID_PCM_F64LE;
890 }
891 } else {
892 if (flags & 2) {
893 if (bps == 8)
894 // signed integer
895 if (flags & 4) return CODEC_ID_PCM_S8;
896 else return CODEC_ID_PCM_U8;
897 else if (bps == 16) return CODEC_ID_PCM_S16BE;
898 else if (bps == 24) return CODEC_ID_PCM_S24BE;
899 else if (bps == 32) return CODEC_ID_PCM_S32BE;
900 } else {
901 if (bps == 8)
902 if (flags & 4) return CODEC_ID_PCM_S8;
903 else return CODEC_ID_PCM_U8;
904 else if (bps == 16) return CODEC_ID_PCM_S16LE;
905 else if (bps == 24) return CODEC_ID_PCM_S24LE;
906 else if (bps == 32) return CODEC_ID_PCM_S32LE;
907 }
908 }
909 return CODEC_ID_NONE;
910 }
911
912 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
913 {
914 AVStream *st;
915 MOVStreamContext *sc;
916 int j, pseudo_stream_id;
917
918 if (c->fc->nb_streams < 1)
919 return 0;
920 st = c->fc->streams[c->fc->nb_streams-1];
921 sc = st->priv_data;
922
923 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
924 //Parsing Sample description table
925 enum CodecID id;
926 int dref_id = 1;
927 MOVAtom a = { AV_RL32("stsd") };
928 int64_t start_pos = url_ftell(pb);
929 int size = avio_rb32(pb); /* size */
930 uint32_t format = avio_rl32(pb); /* data format */
931
932 if (size >= 16) {
933 avio_rb32(pb); /* reserved */
934 avio_rb16(pb); /* reserved */
935 dref_id = avio_rb16(pb);
936 }
937
938 if (st->codec->codec_tag &&
939 st->codec->codec_tag != format &&
940 (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
941 : st->codec->codec_tag != MKTAG('j','p','e','g'))
942 ){
943 /* Multiple fourcc, we skip JPEG. This is not correct, we should
944 * export it as a separate AVStream but this needs a few changes
945 * in the MOV demuxer, patch welcome. */
946 multiple_stsd:
947 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
948 url_fskip(pb, size - (url_ftell(pb) - start_pos));
949 continue;
950 }
951 /* we cannot demux concatenated h264 streams because of different extradata */
952 if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
953 goto multiple_stsd;
954 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
955 sc->dref_id= dref_id;
956
957 st->codec->codec_tag = format;
958 id = ff_codec_get_id(codec_movaudio_tags, format);
959 if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
960 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
961
962 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
963 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
964 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
965 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
966 id = ff_codec_get_id(codec_movvideo_tags, format);
967 if (id <= 0)
968 id = ff_codec_get_id(ff_codec_bmp_tags, format);
969 if (id > 0)
970 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
971 else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
972 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
973 if(id > 0)
974 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
975 }
976 }
977
978 av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
979 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
980 (format >> 24) & 0xff, st->codec->codec_type);
981
982 if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
983 unsigned int color_depth, len;
984 int color_greyscale;
985
986 st->codec->codec_id = id;
987 avio_rb16(pb); /* version */
988 avio_rb16(pb); /* revision level */
989 avio_rb32(pb); /* vendor */
990 avio_rb32(pb); /* temporal quality */
991 avio_rb32(pb); /* spatial quality */
992
993 st->codec->width = avio_rb16(pb); /* width */
994 st->codec->height = avio_rb16(pb); /* height */
995
996 avio_rb32(pb); /* horiz resolution */
997 avio_rb32(pb); /* vert resolution */
998 avio_rb32(pb); /* data size, always 0 */
999 avio_rb16(pb); /* frames per samples */
1000
1001 len = avio_r8(pb); /* codec name, pascal string */
1002 if (len > 31)
1003 len = 31;
1004 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1005 if (len < 31)
1006 url_fskip(pb, 31 - len);
1007 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1008 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1009 st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1010
1011 st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1012 st->codec->color_table_id = avio_rb16(pb); /* colortable id */
1013 av_dlog(c->fc, "depth %d, ctab id %d\n",
1014 st->codec->bits_per_coded_sample, st->codec->color_table_id);
1015 /* figure out the palette situation */
1016 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1017 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1018
1019 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1020 if ((color_depth == 2) || (color_depth == 4) ||
1021 (color_depth == 8)) {
1022 /* for palette traversal */
1023 unsigned int color_start, color_count, color_end;
1024 unsigned char r, g, b;
1025
1026 st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1027 if (color_greyscale) {
1028 int color_index, color_dec;
1029 /* compute the greyscale palette */
1030 st->codec->bits_per_coded_sample = color_depth;
1031 color_count = 1 << color_depth;
1032 color_index = 255;
1033 color_dec = 256 / (color_count - 1);
1034 for (j = 0; j < color_count; j++) {
1035 r = g = b = color_index;
1036 st->codec->palctrl->palette[j] =
1037 (r << 16) | (g << 8) | (b);
1038 color_index -= color_dec;
1039 if (color_index < 0)
1040 color_index = 0;
1041 }
1042 } else if (st->codec->color_table_id) {
1043 const uint8_t *color_table;
1044 /* if flag bit 3 is set, use the default palette */
1045 color_count = 1 << color_depth;
1046 if (color_depth == 2)
1047 color_table = ff_qt_default_palette_4;
1048 else if (color_depth == 4)
1049 color_table = ff_qt_default_palette_16;
1050 else
1051 color_table = ff_qt_default_palette_256;
1052
1053 for (j = 0; j < color_count; j++) {
1054 r = color_table[j * 3 + 0];
1055 g = color_table[j * 3 + 1];
1056 b = color_table[j * 3 + 2];
1057 st->codec->palctrl->palette[j] =
1058 (r << 16) | (g << 8) | (b);
1059 }
1060 } else {
1061 /* load the palette from the file */
1062 color_start = avio_rb32(pb);
1063 color_count = avio_rb16(pb);
1064 color_end = avio_rb16(pb);
1065 if ((color_start <= 255) &&
1066 (color_end <= 255)) {
1067 for (j = color_start; j <= color_end; j++) {
1068 /* each R, G, or B component is 16 bits;
1069 * only use the top 8 bits; skip alpha bytes
1070 * up front */
1071 avio_r8(pb);
1072 avio_r8(pb);
1073 r = avio_r8(pb);
1074 avio_r8(pb);
1075 g = avio_r8(pb);
1076 avio_r8(pb);
1077 b = avio_r8(pb);
1078 avio_r8(pb);
1079 st->codec->palctrl->palette[j] =
1080 (r << 16) | (g << 8) | (b);
1081 }
1082 }
1083 }
1084 st->codec->palctrl->palette_changed = 1;
1085 }
1086 } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1087 int bits_per_sample, flags;
1088 uint16_t version = avio_rb16(pb);
1089
1090 st->codec->codec_id = id;
1091 avio_rb16(pb); /* revision level */
1092 avio_rb32(pb); /* vendor */
1093
1094 st->codec->channels = avio_rb16(pb); /* channel count */
1095 av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1096 st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1097
1098 sc->audio_cid = avio_rb16(pb);
1099 avio_rb16(pb); /* packet size = 0 */
1100
1101 st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1102
1103 //Read QT version 1 fields. In version 0 these do not exist.
1104 av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
1105 if(!c->isom) {
1106 if(version==1) {
1107 sc->samples_per_frame = avio_rb32(pb);
1108 avio_rb32(pb); /* bytes per packet */
1109 sc->bytes_per_frame = avio_rb32(pb);
1110 avio_rb32(pb); /* bytes per sample */
1111 } else if(version==2) {
1112 avio_rb32(pb); /* sizeof struct only */
1113 st->codec->sample_rate = av_int2dbl(avio_rb64(pb)); /* float 64 */
1114 st->codec->channels = avio_rb32(pb);
1115 avio_rb32(pb); /* always 0x7F000000 */
1116 st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
1117 flags = avio_rb32(pb); /* lpcm format specific flag */
1118 sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
1119 sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
1120 if (format == MKTAG('l','p','c','m'))
1121 st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1122 }
1123 }
1124
1125 switch (st->codec->codec_id) {
1126 case CODEC_ID_PCM_S8:
1127 case CODEC_ID_PCM_U8:
1128 if (st->codec->bits_per_coded_sample == 16)
1129 st->codec->codec_id = CODEC_ID_PCM_S16BE;
1130 break;
1131 case CODEC_ID_PCM_S16LE:
1132 case CODEC_ID_PCM_S16BE:
1133 if (st->codec->bits_per_coded_sample == 8)
1134 st->codec->codec_id = CODEC_ID_PCM_S8;
1135 else if (st->codec->bits_per_coded_sample == 24)
1136 st->codec->codec_id =
1137 st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1138 CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1139 break;
1140 /* set values for old format before stsd version 1 appeared */
1141 case CODEC_ID_MACE3:
1142 sc->samples_per_frame = 6;
1143 sc->bytes_per_frame = 2*st->codec->channels;
1144 break;
1145 case CODEC_ID_MACE6:
1146 sc->samples_per_frame = 6;
1147 sc->bytes_per_frame = 1*st->codec->channels;
1148 break;
1149 case CODEC_ID_ADPCM_IMA_QT:
1150 sc->samples_per_frame = 64;
1151 sc->bytes_per_frame = 34*st->codec->channels;
1152 break;
1153 case CODEC_ID_GSM:
1154 sc->samples_per_frame = 160;
1155 sc->bytes_per_frame = 33;
1156 break;
1157 default:
1158 break;
1159 }
1160
1161 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1162 if (bits_per_sample) {
1163 st->codec->bits_per_coded_sample = bits_per_sample;
1164 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1165 }
1166 } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1167 // ttxt stsd contains display flags, justification, background
1168 // color, fonts, and default styles, so fake an atom to read it
1169 MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1170 if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1171 mov_read_glbl(c, pb, fake_atom);
1172 st->codec->codec_id= id;
1173 st->codec->width = sc->width;
1174 st->codec->height = sc->height;
1175 } else {
1176 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1177 url_fskip(pb, size - (url_ftell(pb) - start_pos));
1178 }
1179 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1180 a.size = size - (url_ftell(pb) - start_pos);
1181 if (a.size > 8) {
1182 if (mov_read_default(c, pb, a) < 0)
1183 return -1;
1184 } else if (a.size > 0)
1185 url_fskip(pb, a.size);
1186 }
1187
1188 if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1189 st->codec->sample_rate= sc->time_scale;
1190
1191 /* special codec parameters handling */
1192 switch (st->codec->codec_id) {
1193 #if CONFIG_DV_DEMUXER
1194 case CODEC_ID_DVAUDIO:
1195 c->dv_fctx = avformat_alloc_context();
1196 c->dv_demux = dv_init_demux(c->dv_fctx);
1197 if (!c->dv_demux) {
1198 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1199 return -1;
1200 }
1201 sc->dv_audio_container = 1;
1202 st->codec->codec_id = CODEC_ID_PCM_S16LE;
1203 break;
1204 #endif
1205 /* no ifdef since parameters are always those */
1206 case CODEC_ID_QCELP:
1207 // force sample rate for qcelp when not stored in mov
1208 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1209 st->codec->sample_rate = 8000;
1210 st->codec->frame_size= 160;
1211 st->codec->channels= 1; /* really needed */
1212 break;
1213 case CODEC_ID_AMR_NB:
1214 case CODEC_ID_AMR_WB:
1215 st->codec->frame_size= sc->samples_per_frame;
1216 st->codec->channels= 1; /* really needed */
1217 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1218 if (st->codec->codec_id == CODEC_ID_AMR_NB)
1219 st->codec->sample_rate = 8000;
1220 else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1221 st->codec->sample_rate = 16000;
1222 break;
1223 case CODEC_ID_MP2:
1224 case CODEC_ID_MP3:
1225 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1226 st->need_parsing = AVSTREAM_PARSE_FULL;
1227 break;
1228 case CODEC_ID_GSM:
1229 case CODEC_ID_ADPCM_MS:
1230 case CODEC_ID_ADPCM_IMA_WAV:
1231 st->codec->frame_size = sc->samples_per_frame;
1232 st->codec->block_align = sc->bytes_per_frame;
1233 break;
1234 case CODEC_ID_ALAC:
1235 if (st->codec->extradata_size == 36) {
1236 st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1237 st->codec->channels = AV_RB8 (st->codec->extradata+21);
1238 st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
1239 }
1240 break;
1241 default:
1242 break;
1243 }
1244
1245 return 0;
1246 }
1247
1248 static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1249 {
1250 int entries;
1251
1252 avio_r8(pb); /* version */
1253 avio_rb24(pb); /* flags */
1254 entries = avio_rb32(pb);
1255
1256 return ff_mov_read_stsd_entries(c, pb, entries);
1257 }
1258
1259 static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1260 {
1261 AVStream *st;
1262 MOVStreamContext *sc;
1263 unsigned int i, entries;
1264
1265 if (c->fc->nb_streams < 1)
1266 return 0;
1267 st = c->fc->streams[c->fc->nb_streams-1];
1268 sc = st->priv_data;
1269
1270 avio_r8(pb); /* version */
1271 avio_rb24(pb); /* flags */
1272
1273 entries = avio_rb32(pb);
1274
1275 av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1276
1277 if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1278 return -1;
1279 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1280 if (!sc->stsc_data)
1281 return AVERROR(ENOMEM);
1282 sc->stsc_count = entries;
1283
1284 for(i=0; i<entries; i++) {
1285 sc->stsc_data[i].first = avio_rb32(pb);
1286 sc->stsc_data[i].count = avio_rb32(pb);
1287 sc->stsc_data[i].id = avio_rb32(pb);
1288 }
1289 return 0;
1290 }
1291
1292 static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1293 {
1294 AVStream *st;
1295 MOVStreamContext *sc;
1296 unsigned i, entries;
1297
1298 if (c->fc->nb_streams < 1)
1299 return 0;
1300 st = c->fc->streams[c->fc->nb_streams-1];
1301 sc = st->priv_data;
1302
1303 avio_rb32(pb); // version + flags
1304
1305 entries = avio_rb32(pb);
1306 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1307 return -1;
1308 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1309 if (!sc->stps_data)
1310 return AVERROR(ENOMEM);
1311 sc->stps_count = entries;
1312
1313 for (i = 0; i < entries; i++) {
1314 sc->stps_data[i] = avio_rb32(pb);
1315 //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1316 }
1317
1318 return 0;
1319 }
1320
1321 static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1322 {
1323 AVStream *st;
1324 MOVStreamContext *sc;
1325 unsigned int i, entries;
1326
1327 if (c->fc->nb_streams < 1)
1328 return 0;
1329 st = c->fc->streams[c->fc->nb_streams-1];
1330 sc = st->priv_data;
1331
1332 avio_r8(pb); /* version */
1333 avio_rb24(pb); /* flags */
1334
1335 entries = avio_rb32(pb);
1336
1337 av_dlog(c->fc, "keyframe_count = %d\n", entries);
1338
1339 if(entries >= UINT_MAX / sizeof(int))
1340 return -1;
1341 sc->keyframes = av_malloc(entries * sizeof(int));
1342 if (!sc->keyframes)
1343 return AVERROR(ENOMEM);
1344 sc->keyframe_count = entries;
1345
1346 for(i=0; i<entries; i++) {
1347 sc->keyframes[i] = avio_rb32(pb);
1348 //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1349 }
1350 return 0;
1351 }
1352
1353 static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1354 {
1355 AVStream *st;
1356 MOVStreamContext *sc;
1357 unsigned int i, entries, sample_size, field_size, num_bytes;
1358 GetBitContext gb;
1359 unsigned char* buf;
1360
1361 if (c->fc->nb_streams < 1)
1362 return 0;
1363 st = c->fc->streams[c->fc->nb_streams-1];
1364 sc = st->priv_data;
1365
1366 avio_r8(pb); /* version */
1367 avio_rb24(pb); /* flags */
1368
1369 if (atom.type == MKTAG('s','t','s','z')) {
1370 sample_size = avio_rb32(pb);
1371 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1372 sc->sample_size = sample_size;
1373 field_size = 32;
1374 } else {
1375 sample_size = 0;
1376 avio_rb24(pb); /* reserved */
1377 field_size = avio_r8(pb);
1378 }
1379 entries = avio_rb32(pb);
1380
1381 av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1382
1383 sc->sample_count = entries;
1384 if (sample_size)
1385 return 0;
1386
1387 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1388 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1389 return -1;
1390 }
1391
1392 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1393 return -1;
1394 sc->sample_sizes = av_malloc(entries * sizeof(int));
1395 if (!sc->sample_sizes)
1396 return AVERROR(ENOMEM);
1397
1398 num_bytes = (entries*field_size+4)>>3;
1399
1400 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1401 if (!buf) {
1402 av_freep(&sc->sample_sizes);
1403 return AVERROR(ENOMEM);
1404 }
1405
1406 if (avio_read(pb, buf, num_bytes) < num_bytes) {
1407 av_freep(&sc->sample_sizes);
1408 av_free(buf);
1409 return -1;
1410 }
1411
1412 init_get_bits(&gb, buf, 8*num_bytes);
1413
1414 for(i=0; i<entries; i++)
1415 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1416
1417 av_free(buf);
1418 return 0;
1419 }
1420
1421 static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1422 {
1423 AVStream *st;
1424 MOVStreamContext *sc;
1425 unsigned int i, entries;
1426 int64_t duration=0;
1427 int64_t total_sample_count=0;
1428
1429 if (c->fc->nb_streams < 1)
1430 return 0;
1431 st = c->fc->streams[c->fc->nb_streams-1];
1432 sc = st->priv_data;
1433
1434 avio_r8(pb); /* version */
1435 avio_rb24(pb); /* flags */
1436 entries = avio_rb32(pb);
1437
1438 av_dlog(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1439
1440 if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1441 return -1;
1442 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1443 if (!sc->stts_data)
1444 return AVERROR(ENOMEM);
1445 sc->stts_count = entries;
1446
1447 for(i=0; i<entries; i++) {
1448 int sample_duration;
1449 int sample_count;
1450
1451 sample_count=avio_rb32(pb);
1452 sample_duration = avio_rb32(pb);
1453 sc->stts_data[i].count= sample_count;
1454 sc->stts_data[i].duration= sample_duration;
1455
1456 av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1457
1458 duration+=(int64_t)sample_duration*sample_count;
1459 total_sample_count+=sample_count;
1460 }
1461
1462 st->nb_frames= total_sample_count;
1463 if(duration)
1464 st->duration= duration;
1465 return 0;
1466 }
1467
1468 static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1469 {
1470 AVStream *st;
1471 MOVStreamContext *sc;
1472 unsigned int i, entries;
1473
1474 if (c->fc->nb_streams < 1)
1475 return 0;
1476 st = c->fc->streams[c->fc->nb_streams-1];
1477 sc = st->priv_data;
1478
1479 avio_r8(pb); /* version */
1480 avio_rb24(pb); /* flags */
1481 entries = avio_rb32(pb);
1482
1483 av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1484
1485 if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1486 return -1;
1487 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1488 if (!sc->ctts_data)
1489 return AVERROR(ENOMEM);
1490 sc->ctts_count = entries;
1491
1492 for(i=0; i<entries; i++) {
1493 int count =avio_rb32(pb);
1494 int duration =avio_rb32(pb);
1495
1496 sc->ctts_data[i].count = count;
1497 sc->ctts_data[i].duration= duration;
1498 if (duration < 0)
1499 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1500 }
1501
1502 av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
1503
1504 return 0;
1505 }
1506
1507 static void mov_build_index(MOVContext *mov, AVStream *st)
1508 {
1509 MOVStreamContext *sc = st->priv_data;
1510 int64_t current_offset;
1511 int64_t current_dts = 0;
1512 unsigned int stts_index = 0;
1513 unsigned int stsc_index = 0;
1514 unsigned int stss_index = 0;
1515 unsigned int stps_index = 0;
1516 unsigned int i, j;
1517 uint64_t stream_size = 0;
1518
1519 /* adjust first dts according to edit list */
1520 if (sc->time_offset && mov->time_scale > 0) {
1521 int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1522 current_dts = -rescaled;
1523 if (sc->ctts_data && sc->stts_data &&
1524 sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1525 /* more than 16 frames delay, dts are likely wrong
1526 this happens with files created by iMovie */
1527 sc->wrong_dts = 1;
1528 st->codec->has_b_frames = 1;
1529 }
1530 }
1531
1532 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1533 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1534 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1535 unsigned int current_sample = 0;
1536 unsigned int stts_sample = 0;
1537 unsigned int sample_size;
1538 unsigned int distance = 0;
1539 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1540
1541 current_dts -= sc->dts_shift;
1542
1543 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1544 return;
1545 st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1546 if (!st->index_entries)
1547 return;
1548 st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1549
1550 for (i = 0; i < sc->chunk_count; i++) {
1551 current_offset = sc->chunk_offsets[i];
1552 if (stsc_index + 1 < sc->stsc_count &&
1553 i + 1 == sc->stsc_data[stsc_index + 1].first)
1554 stsc_index++;
1555 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1556 int keyframe = 0;
1557 if (current_sample >= sc->sample_count) {
1558 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1559 return;
1560 }
1561
1562 if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1563 keyframe = 1;
1564 if (stss_index + 1 < sc->keyframe_count)
1565 stss_index++;
1566 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1567 keyframe = 1;
1568 if (stps_index + 1 < sc->stps_count)
1569 stps_index++;
1570 }
1571 if (keyframe)
1572 distance = 0;
1573 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1574 if(sc->pseudo_stream_id == -1 ||
1575 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1576 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1577 e->pos = current_offset;
1578 e->timestamp = current_dts;
1579 e->size = sample_size;
1580 e->min_distance = distance;
1581 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1582 av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1583 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1584 current_offset, current_dts, sample_size, distance, keyframe);
1585 }
1586
1587 current_offset += sample_size;
1588 stream_size += sample_size;
1589 current_dts += sc->stts_data[stts_index].duration;
1590 distance++;
1591 stts_sample++;
1592 current_sample++;
1593 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1594 stts_sample = 0;
1595 stts_index++;
1596 }
1597 }
1598 }
1599 if (st->duration > 0)
1600 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1601 } else {
1602 unsigned chunk_samples, total = 0;
1603
1604 // compute total chunk count
1605 for (i = 0; i < sc->stsc_count; i++) {
1606 unsigned count, chunk_count;
1607
1608 chunk_samples = sc->stsc_data[i].count;
1609 if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1610 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1611 return;
1612 }
1613
1614 if (sc->samples_per_frame >= 160) { // gsm
1615 count = chunk_samples / sc->samples_per_frame;
1616 } else if (sc->samples_per_frame > 1) {
1617 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1618 count = (chunk_samples+samples-1) / samples;
1619 } else {
1620 count = (chunk_samples+1023) / 1024;
1621 }
1622
1623 if (i < sc->stsc_count - 1)
1624 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1625 else
1626 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1627 total += chunk_count * count;
1628 }
1629
1630 av_dlog(mov->fc, "chunk count %d\n", total);
1631 if (total >= UINT_MAX / sizeof(*st->index_entries))
1632 return;
1633 st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1634 if (!st->index_entries)
1635 return;
1636 st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1637
1638 // populate index
1639 for (i = 0; i < sc->chunk_count; i++) {
1640 current_offset = sc->chunk_offsets[i];
1641 if (stsc_index + 1 < sc->stsc_count &&
1642 i + 1 == sc->stsc_data[stsc_index + 1].first)
1643 stsc_index++;
1644 chunk_samples = sc->stsc_data[stsc_index].count;
1645
1646 while (chunk_samples > 0) {
1647 AVIndexEntry *e;
1648 unsigned size, samples;
1649
1650 if (sc->samples_per_frame >= 160) { // gsm
1651 samples = sc->samples_per_frame;
1652 size = sc->bytes_per_frame;
1653 } else {
1654 if (sc->samples_per_frame > 1) {
1655 samples = FFMIN((1024 / sc->samples_per_frame)*
1656 sc->samples_per_frame, chunk_samples);
1657 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1658 } else {
1659 samples = FFMIN(1024, chunk_samples);
1660 size = samples * sc->sample_size;
1661 }
1662 }
1663
1664 if (st->nb_index_entries >= total) {
1665 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1666 return;
1667 }
1668 e = &st->index_entries[st->nb_index_entries++];
1669 e->pos = current_offset;
1670 e->timestamp = current_dts;
1671 e->size = size;
1672 e->min_distance = 0;
1673 e->flags = AVINDEX_KEYFRAME;
1674 av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1675 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1676 size, samples);
1677
1678 current_offset += size;
1679 current_dts += samples;
1680 chunk_samples -= samples;
1681 }
1682 }
1683 }
1684 }
1685
1686 static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref)
1687 {
1688 /* try relative path, we do not try the absolute because it can leak information about our
1689 system to an attacker */
1690 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1691 char filename[1024];
1692 char *src_path;
1693 int i, l;
1694
1695 /* find a source dir */
1696 src_path = strrchr(src, '/');
1697 if (src_path)
1698 src_path++;
1699 else
1700 src_path = src;
1701
1702 /* find a next level down to target */
1703 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1704 if (ref->path[l] == '/') {
1705 if (i == ref->nlvl_to - 1)
1706 break;
1707 else
1708 i++;
1709 }
1710
1711 /* compose filename if next level down to target was found */
1712 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
1713 memcpy(filename, src, src_path - src);
1714 filename[src_path - src] = 0;
1715
1716 for (i = 1; i < ref->nlvl_from; i++)
1717 av_strlcat(filename, "../", 1024);
1718
1719 av_strlcat(filename, ref->path + l + 1, 1024);
1720
1721 if (!url_fopen(pb, filename, URL_RDONLY))
1722 return 0;
1723 }
1724 }
1725
1726 return AVERROR(ENOENT);
1727 }
1728
1729 static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1730 {
1731 AVStream *st;
1732 MOVStreamContext *sc;
1733 int ret;
1734
1735 st = av_new_stream(c->fc, c->fc->nb_streams);
1736 if (!st) return AVERROR(ENOMEM);
1737 sc = av_mallocz(sizeof(MOVStreamContext));
1738 if (!sc) return AVERROR(ENOMEM);
1739
1740 st->priv_data = sc;
1741 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1742 sc->ffindex = st->index;
1743
1744 if ((ret = mov_read_default(c, pb, atom)) < 0)
1745 return ret;
1746
1747 /* sanity checks */
1748 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1749 (!sc->sample_size && !sc->sample_count))) {
1750 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1751 st->index);
1752 return 0;
1753 }
1754
1755 if (sc->time_scale <= 0) {
1756 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1757 sc->time_scale = c->time_scale;
1758 if (sc->time_scale <= 0)
1759 sc->time_scale = 1;
1760 }
1761
1762 av_set_pts_info(st, 64, 1, sc->time_scale);
1763
1764 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1765 !st->codec->frame_size && sc->stts_count == 1) {
1766 st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1767 st->codec->sample_rate, sc->time_scale);
1768 av_dlog(c->fc, "frame size %d\n", st->codec->frame_size);
1769 }
1770
1771 mov_build_index(c, st);
1772
1773 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1774 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1775 if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1776 av_log(c->fc, AV_LOG_ERROR,
1777 "stream %d, error opening alias: path='%s', dir='%s', "
1778 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1779 st->index, dref->path, dref->dir, dref->filename,
1780 dref->volume, dref->nlvl_from, dref->nlvl_to);
1781 } else
1782 sc->pb = c->fc->pb;
1783
1784 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1785 if (!st->sample_aspect_ratio.num &&
1786 (st->codec->width != sc->width || st->codec->height != sc->height)) {
1787 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
1788 ((double)st->codec->width * sc->height), INT_MAX);
1789 }
1790
1791 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1792 sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1793
1794 if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
1795 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
1796 sc->time_scale, sc->stts_data[0].duration, INT_MAX);
1797 }
1798
1799 switch (st->codec->codec_id) {
1800 #if CONFIG_H261_DECODER
1801 case CODEC_ID_H261:
1802 #endif
1803 #if CONFIG_H263_DECODER
1804 case CODEC_ID_H263:
1805 #endif
1806 #if CONFIG_H264_DECODER
1807 case CODEC_ID_H264:
1808 #endif
1809 #if CONFIG_MPEG4_DECODER
1810 case CODEC_ID_MPEG4:
1811 #endif
1812 st->codec->width = 0; /* let decoder init width/height */
1813 st->codec->height= 0;
1814 break;
1815 }
1816
1817 /* Do not need those anymore. */
1818 av_freep(&sc->chunk_offsets);
1819 av_freep(&sc->stsc_data);
1820 av_freep(&sc->sample_sizes);
1821 av_freep(&sc->keyframes);
1822 av_freep(&sc->stts_data);
1823 av_freep(&sc->stps_data);
1824
1825 return 0;
1826 }
1827
1828 static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1829 {
1830 int ret;
1831 c->itunes_metadata = 1;
1832 ret = mov_read_default(c, pb, atom);
1833 c->itunes_metadata = 0;
1834 return ret;
1835 }
1836
1837 static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1838 {
1839 while (atom.size > 8) {
1840 uint32_t tag = avio_rl32(pb);
1841 atom.size -= 4;
1842 if (tag == MKTAG('h','d','l','r')) {
1843 url_fseek(pb, -8, SEEK_CUR);
1844 atom.size += 8;
1845 return mov_read_default(c, pb, atom);
1846 }
1847 }
1848 return 0;
1849 }
1850
1851 static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1852 {
1853 int i;
1854 int width;
1855 int height;
1856 int64_t disp_transform[2];
1857 int display_matrix[3][2];
1858 AVStream *st;
1859 MOVStreamContext *sc;
1860 int version;
1861
1862 if (c->fc->nb_streams < 1)
1863 return 0;
1864 st = c->fc->streams[c->fc->nb_streams-1];
1865 sc = st->priv_data;
1866
1867 version = avio_r8(pb);
1868 avio_rb24(pb); /* flags */
1869 /*
1870 MOV_TRACK_ENABLED 0x0001
1871 MOV_TRACK_IN_MOVIE 0x0002
1872 MOV_TRACK_IN_PREVIEW 0x0004
1873 MOV_TRACK_IN_POSTER 0x0008
1874 */
1875
1876 if (version == 1) {
1877 avio_rb64(pb);
1878 avio_rb64(pb);
1879 } else {
1880 avio_rb32(pb); /* creation time */
1881 avio_rb32(pb); /* modification time */
1882 }
1883 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
1884 avio_rb32(pb); /* reserved */
1885
1886 /* highlevel (considering edits) duration in movie timebase */
1887 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
1888 avio_rb32(pb); /* reserved */
1889 avio_rb32(pb); /* reserved */
1890
1891 avio_rb16(pb); /* layer */
1892 avio_rb16(pb); /* alternate group */
1893 avio_rb16(pb); /* volume */
1894 avio_rb16(pb); /* reserved */
1895
1896 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1897 // they're kept in fixed point format through all calculations
1898 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1899 for (i = 0; i < 3; i++) {
1900 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1901 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1902 avio_rb32(pb); // 2.30 fixed point (not used)
1903 }
1904
1905 width = avio_rb32(pb); // 16.16 fixed point track width
1906 height = avio_rb32(pb); // 16.16 fixed point track height
1907 sc->width = width >> 16;
1908 sc->height = height >> 16;
1909
1910 // transform the display width/height according to the matrix
1911 // skip this if the display matrix is the default identity matrix
1912 // or if it is rotating the picture, ex iPhone 3GS
1913 // to keep the same scale, use [width height 1<<16]
1914 if (width && height &&
1915 ((display_matrix[0][0] != 65536 ||
1916 display_matrix[1][1] != 65536) &&
1917 !display_matrix[0][1] &&
1918 !display_matrix[1][0] &&
1919 !display_matrix[2][0] && !display_matrix[2][1])) {
1920 for (i = 0; i < 2; i++)
1921 disp_transform[i] =
1922 (int64_t) width * display_matrix[0][i] +
1923 (int64_t) height * display_matrix[1][i] +
1924 ((int64_t) display_matrix[2][i] << 16);
1925
1926 //sample aspect ratio is new width/height divided by old width/height
1927 st->sample_aspect_ratio = av_d2q(
1928 ((double) disp_transform[0] * height) /
1929 ((double) disp_transform[1] * width), INT_MAX);
1930 }
1931 return 0;
1932 }
1933
1934 static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1935 {
1936 MOVFragment *frag = &c->fragment;
1937 MOVTrackExt *trex = NULL;
1938 int flags, track_id, i;
1939
1940 avio_r8(pb); /* version */
1941 flags = avio_rb24(pb);
1942
1943 track_id = avio_rb32(pb);
1944 if (!track_id)
1945 return -1;
1946 frag->track_id = track_id;
1947 for (i = 0; i < c->trex_count; i++)
1948 if (c->trex_data[i].track_id == frag->track_id) {
1949 trex = &c->trex_data[i];
1950 break;
1951 }
1952 if (!trex) {
1953 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1954 return -1;
1955 }
1956
1957 if (flags & 0x01) frag->base_data_offset = avio_rb64(pb);
1958 else frag->base_data_offset = frag->moof_offset;
1959 if (flags & 0x02) frag->stsd_id = avio_rb32(pb);
1960 else frag->stsd_id = trex->stsd_id;
1961
1962 frag->duration = flags & 0x08 ? avio_rb32(pb) : trex->duration;
1963 frag->size = flags & 0x10 ? avio_rb32(pb) : trex->size;
1964 frag->flags = flags & 0x20 ? avio_rb32(pb) : trex->flags;
1965 av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
1966 return 0;
1967 }
1968
1969 static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1970 {
1971 c->chapter_track = avio_rb32(pb);
1972 return 0;
1973 }
1974
1975 static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1976 {
1977 MOVTrackExt *trex;
1978
1979 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1980 return -1;
1981 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1982 if (!trex)
1983 return AVERROR(ENOMEM);
1984 c->trex_data = trex;
1985 trex = &c->trex_data[c->trex_count++];
1986 avio_r8(pb); /* version */
1987 avio_rb24(pb); /* flags */
1988 trex->track_id = avio_rb32(pb);
1989 trex->stsd_id = avio_rb32(pb);
1990 trex->duration = avio_rb32(pb);
1991 trex->size = avio_rb32(pb);
1992 trex->flags = avio_rb32(pb);
1993 return 0;
1994 }
1995
1996 static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1997 {
1998 MOVFragment *frag = &c->fragment;
1999 AVStream *st = NULL;
2000 MOVStreamContext *sc;
2001 uint64_t offset;
2002 int64_t dts;
2003 int data_offset = 0;
2004 unsigned entries, first_sample_flags = frag->flags;
2005 int flags, distance, i;
2006
2007 for (i = 0; i < c->fc->nb_streams; i++) {
2008 if (c->fc->streams[i]->id == frag->track_id) {
2009 st = c->fc->streams[i];
2010 break;
2011 }
2012 }
2013 if (!st) {
2014 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2015 return -1;
2016 }
2017 sc = st->priv_data;
2018 if (sc->pseudo_stream_id+1 != frag->stsd_id)
2019 return 0;
2020 avio_r8(pb); /* version */
2021 flags = avio_rb24(pb);
2022 entries = avio_rb32(pb);
2023 av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2024 if (flags & 0x001) data_offset = avio_rb32(pb);
2025 if (flags & 0x004) first_sample_flags = avio_rb32(pb);
2026 if (flags & 0x800) {
2027 MOVStts *ctts_data;
2028 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2029 return -1;
2030 ctts_data = av_realloc(sc->ctts_data,
2031 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2032 if (!ctts_data)
2033 return AVERROR(ENOMEM);
2034 sc->ctts_data = ctts_data;
2035 }
2036 dts = st->duration;
2037 offset = frag->base_data_offset + data_offset;
2038 distance = 0;
2039 av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2040 for (i = 0; i < entries; i++) {
2041 unsigned sample_size = frag->size;
2042 int sample_flags = i ? frag->flags : first_sample_flags;
2043 unsigned sample_duration = frag->duration;
2044 int keyframe;
2045
2046 if (flags & 0x100) sample_duration = avio_rb32(pb);
2047 if (flags & 0x200) sample_size = avio_rb32(pb);
2048 if (flags & 0x400) sample_flags = avio_rb32(pb);
2049 if (flags & 0x800) {
2050 sc->ctts_data[sc->ctts_count].count = 1;
2051 sc->ctts_data[sc->ctts_count].duration = avio_rb32(pb);
2052 sc->ctts_count++;
2053 }
2054 if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2055 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2056 distance = 0;
2057 av_add_index_entry(st, offset, dts, sample_size, distance,
2058 keyframe ? AVINDEX_KEYFRAME : 0);
2059 av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2060 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2061 offset, dts, sample_size, distance, keyframe);
2062 distance++;
2063 dts += sample_duration;
2064 offset += sample_size;
2065 }
2066 frag->moof_offset = offset;
2067 st->duration = dts;
2068 return 0;
2069 }
2070
2071 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2072 /* like the files created with Adobe Premiere 5.0, for samples see */
2073 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2074 static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2075 {
2076 int err;
2077
2078 if (atom.size < 8)
2079 return 0; /* continue */
2080 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2081 url_fskip(pb, atom.size - 4);
2082 return 0;
2083 }
2084 atom.type = avio_rl32(pb);
2085 atom.size -= 8;
2086 if (atom.type != MKTAG('m','d','a','t')) {
2087 url_fskip(pb, atom.size);
2088 return 0;
2089 }
2090 err = mov_read_mdat(c, pb, atom);
2091 return err;
2092 }
2093
2094 static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2095 {
2096 #if CONFIG_ZLIB
2097 AVIOContext ctx;
2098 uint8_t *cmov_data;
2099 uint8_t *moov_data; /* uncompressed data */
2100 long cmov_len, moov_len;
2101 int ret = -1;
2102
2103 avio_rb32(pb); /* dcom atom */
2104 if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2105 return -1;
2106 if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2107 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2108 return -1;
2109 }
2110 avio_rb32(pb); /* cmvd atom */
2111 if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2112 return -1;
2113 moov_len = avio_rb32(pb); /* uncompressed size */
2114 cmov_len = atom.size - 6 * 4;
2115
2116 cmov_data = av_malloc(cmov_len);
2117 if (!cmov_data)
2118 return AVERROR(ENOMEM);
2119 moov_data = av_malloc(moov_len);
2120 if (!moov_data) {
2121 av_free(cmov_data);
2122 return AVERROR(ENOMEM);
2123 }
2124 avio_read(pb, cmov_data, cmov_len);
2125 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2126 goto free_and_return;
2127 if(ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2128 goto free_and_return;
2129 atom.type = MKTAG('m','o','o','v');
2130 atom.size = moov_len;
2131 #ifdef DEBUG
2132 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2133 #endif
2134 ret = mov_read_default(c, &ctx, atom);
2135 free_and_return:
2136 av_free(moov_data);
2137 av_free(cmov_data);
2138 return ret;
2139 #else
2140 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2141 return -1;
2142 #endif
2143 }
2144
2145 /* edit list atom */
2146 static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2147 {
2148 MOVStreamContext *sc;
2149 int i, edit_count;
2150
2151 if (c->fc->nb_streams < 1)
2152 return 0;
2153 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2154
2155 avio_r8(pb); /* version */
2156 avio_rb24(pb); /* flags */
2157 edit_count = avio_rb32(pb); /* entries */
2158
2159 if((uint64_t)edit_count*12+8 > atom.size)
2160 return -1;
2161
2162 for(i=0; i<edit_count; i++){
2163 int time;
2164 int duration = avio_rb32(pb); /* Track duration */
2165 time = avio_rb32(pb); /* Media time */
2166 avio_rb32(pb); /* Media rate */
2167 if (i == 0 && time >= -1) {
2168 sc->time_offset = time != -1 ? time : -duration;
2169 }
2170 }
2171
2172 if(edit_count > 1)
2173 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2174 "a/v desync might occur, patch welcome\n");
2175
2176 av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2177 return 0;
2178 }
2179
2180 static const MOVParseTableEntry mov_default_parse_table[] = {
2181 { MKTAG('a','v','s','s'), mov_read_extradata },
2182 { MKTAG('c','h','p','l'), mov_read_chpl },
2183 { MKTAG('c','o','6','4'), mov_read_stco },
2184 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2185 { MKTAG('d','i','n','f'), mov_read_default },
2186 { MKTAG('d','r','e','f'), mov_read_dref },
2187 { MKTAG('e','d','t','s'), mov_read_default },
2188 { MKTAG('e','l','s','t'), mov_read_elst },
2189 { MKTAG('e','n','d','a'), mov_read_enda },
2190 { MKTAG('f','i','e','l'), mov_read_extradata },
2191 { MKTAG('f','t','y','p'), mov_read_ftyp },
2192 { MKTAG('g','l','b','l'), mov_read_glbl },
2193 { MKTAG('h','d','l','r'), mov_read_hdlr },
2194 { MKTAG('i','l','s','t'), mov_read_ilst },
2195 { MKTAG('j','p','2','h'), mov_read_extradata },
2196 { MKTAG('m','d','a','t'), mov_read_mdat },
2197 { MKTAG('m','d','h','d'), mov_read_mdhd },
2198 { MKTAG('m','d','i','a'), mov_read_default },
2199 { MKTAG('m','e','t','a'), mov_read_meta },
2200 { MKTAG('m','i','n','f'), mov_read_default },
2201 { MKTAG('m','o','o','f'), mov_read_moof },
2202 { MKTAG('m','o','o','v'), mov_read_moov },
2203 { MKTAG('m','v','e','x'), mov_read_default },
2204 { MKTAG('m','v','h','d'), mov_read_mvhd },
2205 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2206 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2207 { MKTAG('a','v','c','C'), mov_read_glbl },
2208 { MKTAG('p','a','s','p'), mov_read_pasp },
2209 { MKTAG('s','t','b','l'), mov_read_default },
2210 { MKTAG('s','t','c','o'), mov_read_stco },
2211 { MKTAG('s','t','p','s'), mov_read_stps },
2212 { MKTAG('s','t','r','f'), mov_read_strf },
2213 { MKTAG('s','t','s','c'), mov_read_stsc },
2214 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2215 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2216 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2217 { MKTAG('s','t','t','s'), mov_read_stts },
2218 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2219 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2220 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2221 { MKTAG('t','r','a','k'), mov_read_trak },
2222 { MKTAG('t','r','a','f'), mov_read_default },
2223 { MKTAG('t','r','e','f'), mov_read_default },
2224 { MKTAG('c','h','a','p'), mov_read_chap },
2225 { MKTAG('t','r','e','x'), mov_read_trex },
2226 { MKTAG('t','r','u','n'), mov_read_trun },
2227 { MKTAG('u','d','t','a'), mov_read_default },
2228 { MKTAG('w','a','v','e'), mov_read_wave },
2229 { MKTAG('e','s','d','s'), mov_read_esds },
2230 { MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2231 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2232 { MKTAG('c','m','o','v'), mov_read_cmov },
2233 { 0, NULL }
2234 };
2235
2236 static int mov_probe(AVProbeData *p)
2237 {
2238 unsigned int offset;
2239 uint32_t tag;
2240 int score = 0;
2241
2242 /* check file header */
2243 offset = 0;
2244 for(;;) {
2245 /* ignore invalid offset */
2246 if ((offset + 8) > (unsigned int)p->buf_size)
2247 return score;
2248 tag = AV_RL32(p->buf + offset + 4);
2249 switch(tag) {
2250 /* check for obvious tags */
2251 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2252 case MKTAG('m','o','o','v'):
2253 case MKTAG('m','d','a','t'):
2254 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2255 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2256 case MKTAG('f','t','y','p'):
2257 return AVPROBE_SCORE_MAX;
2258 /* those are more common words, so rate then a bit less */
2259 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2260 case MKTAG('w','i','d','e'):
2261 case MKTAG('f','r','e','e'):
2262 case MKTAG('j','u','n','k'):
2263 case MKTAG('p','i','c','t'):
2264 return AVPROBE_SCORE_MAX - 5;
2265 case MKTAG(0x82,0x82,0x7f,0x7d):
2266 case MKTAG('s','k','i','p'):
2267 case MKTAG('u','u','i','d'):
2268 case MKTAG('p','r','f','l'):
2269 offset = AV_RB32(p->buf+offset) + offset;
2270 /* if we only find those cause probedata is too small at least rate them */
2271 score = AVPROBE_SCORE_MAX - 50;
2272 break;
2273 default:
2274 /* unrecognized tag */
2275 return score;
2276 }
2277 }
2278 return score;
2279 }
2280
2281 // must be done after parsing all trak because there's no order requirement
2282 static void mov_read_chapters(AVFormatContext *s)
2283 {
2284 MOVContext *mov = s->priv_data;
2285 AVStream *st = NULL;
2286 MOVStreamContext *sc;
2287 int64_t cur_pos;
2288 int i;
2289
2290 for (i = 0; i < s->nb_streams; i++)
2291 if (s->streams[i]->id == mov->chapter_track) {
2292 st = s->streams[i];
2293 break;
2294 }
2295 if (!st) {
2296 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2297 return;
2298 }
2299
2300 st->discard = AVDISCARD_ALL;
2301 sc = st->priv_data;
2302 cur_pos = url_ftell(sc->pb);
2303
2304 for (i = 0; i < st->nb_index_entries; i++) {
2305 AVIndexEntry *sample = &st->index_entries[i];
2306 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2307 uint8_t *title;
2308 uint16_t ch;
2309 int len, title_len;
2310
2311 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2312 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2313 goto finish;
2314 }
2315
2316 // the first two bytes are the length of the title
2317 len = avio_rb16(sc->pb);
2318 if (len > sample->size-2)
2319 continue;
2320 title_len = 2*len + 1;
2321 if (!(title = av_mallocz(title_len)))
2322 goto finish;
2323
2324 // The samples could theoretically be in any encoding if there's an encd
2325 // atom following, but in practice are only utf-8 or utf-16, distinguished
2326 // instead by the presence of a BOM
2327 ch = avio_rb16(sc->pb);
2328 if (ch == 0xfeff)
2329 avio_get_str16be(sc->pb, len, title, title_len);
2330 else if (ch == 0xfffe)
2331 avio_get_str16le(sc->pb, len, title, title_len);
2332 else {
2333 AV_WB16(title, ch);
2334 get_strz(sc->pb, title + 2, len - 1);
2335 }
2336
2337 ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
2338 av_freep(&title);
2339 }
2340 finish:
2341 url_fseek(sc->pb, cur_pos, SEEK_SET);
2342 }
2343
2344 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2345 {
2346 MOVContext *mov = s->priv_data;
2347 AVIOContext *pb = s->pb;
2348 int err;
2349 MOVAtom atom = { AV_RL32("root") };
2350
2351 mov->fc = s;
2352 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2353 if(!url_is_streamed(pb))
2354 atom.size = url_fsize(pb);
2355 else
2356 atom.size = INT64_MAX;
2357
2358 /* check MOV header */
2359 if ((err = mov_read_default(mov, pb, atom)) < 0) {
2360 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2361 return err;
2362 }
2363 if (!mov->found_moov) {
2364 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2365 return -1;
2366 }
2367 av_dlog(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2368
2369 if (!url_is_streamed(pb) && mov->chapter_track > 0)
2370 mov_read_chapters(s);
2371
2372 return 0;
2373 }
2374
2375 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2376 {
2377 AVIndexEntry *sample = NULL;
2378 int64_t best_dts = INT64_MAX;
2379 int i;
2380 for (i = 0; i < s->nb_streams; i++) {
2381 AVStream *avst = s->streams[i];
2382 MOVStreamContext *msc = avst->priv_data;
2383 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2384 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2385 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2386 av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2387 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2388 (!url_is_streamed(s->pb) &&
2389 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2390 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2391 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2392 sample = current_sample;
2393 best_dts = dts;
2394 *st = avst;
2395 }
2396 }
2397 }
2398 return sample;
2399 }
2400
2401 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2402 {
2403 MOVContext *mov = s->priv_data;
2404 MOVStreamContext *sc;
2405 AVIndexEntry *sample;
2406 AVStream *st = NULL;
2407 int ret;
2408 retry:
2409 sample = mov_find_next_sample(s, &st);
2410 if (!sample) {
2411 mov->found_mdat = 0;
2412 if (!url_is_streamed(s->pb) ||
2413 mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2414 url_feof(s->pb))
2415 return AVERROR_EOF;
2416 av_dlog(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2417 goto retry;
2418 }
2419 sc = st->priv_data;
2420 /* must be done just before reading, to avoid infinite loop on sample */
2421 sc->current_sample++;
2422
2423 if (st->discard != AVDISCARD_ALL) {
2424 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2425 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2426 sc->ffindex, sample->pos);
2427 return -1;
2428 }
2429 ret = av_get_packet(sc->pb, pkt, sample->size);
2430 if (ret < 0)
2431 return ret;
2432 #if CONFIG_DV_DEMUXER
2433 if (mov->dv_demux && sc->dv_audio_container) {
2434 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2435 av_free(pkt->data);
2436 pkt->size = 0;
2437 ret = dv_get_packet(mov->dv_demux, pkt);
2438 if (ret < 0)
2439 return ret;
2440 }
2441 #endif
2442 }
2443
2444 pkt->stream_index = sc->ffindex;
2445 pkt->dts = sample->timestamp;
2446 if (sc->ctts_data) {
2447 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2448 /* update ctts context */
2449 sc->ctts_sample++;
2450 if (sc->ctts_index < sc->ctts_count &&
2451 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2452 sc->ctts_index++;
2453 sc->ctts_sample = 0;
2454 }
2455 if (sc->wrong_dts)
2456 pkt->dts = AV_NOPTS_VALUE;
2457 } else {
2458 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2459 st->index_entries[sc->current_sample].timestamp : st->duration;
2460 pkt->duration = next_dts - pkt->dts;
2461 pkt->pts = pkt->dts;
2462 }
2463 if (st->discard == AVDISCARD_ALL)
2464 goto retry;
2465 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2466 pkt->pos = sample->pos;
2467 av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2468 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2469 return 0;
2470 }
2471
2472 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2473 {
2474 MOVStreamContext *sc = st->priv_data;
2475 int sample, time_sample;
2476 int i;
2477
2478 sample = av_index_search_timestamp(st, timestamp, flags);
2479 av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2480 if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2481 sample = 0;
2482 if (sample < 0) /* not sure what to do */
2483 return -1;
2484 sc->current_sample = sample;
2485 av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2486 /* adjust ctts index */
2487 if (sc->ctts_data) {
2488 time_sample = 0;
2489 for (i = 0; i < sc->ctts_count; i++) {
2490 int next = time_sample + sc->ctts_data[i].count;
2491 if (next > sc->current_sample) {
2492 sc->ctts_index = i;
2493 sc->ctts_sample = sc->current_sample - time_sample;
2494 break;
2495 }
2496 time_sample = next;
2497 }
2498 }
2499 return sample;
2500 }
2501
2502 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2503 {
2504 AVStream *st;
2505 int64_t seek_timestamp, timestamp;
2506 int sample;
2507 int i;
2508
2509 if (stream_index >= s->nb_streams)
2510 return -1;
2511 if (sample_time < 0)
2512 sample_time = 0;
2513
2514 st = s->streams[stream_index];
2515 sample = mov_seek_stream(s, st, sample_time, flags);
2516 if (sample < 0)
2517 return -1;
2518
2519 /* adjust seek timestamp to found sample timestamp */
2520 seek_timestamp = st->index_entries[sample].timestamp;
2521
2522 for (i = 0; i < s->nb_streams; i++) {
2523 st = s->streams[i];
2524 if (stream_index == i)
2525 continue;
2526
2527 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2528 mov_seek_stream(s, st, timestamp, flags);
2529 }
2530 return 0;
2531 }
2532
2533 static int mov_read_close(AVFormatContext *s)
2534 {
2535 MOVContext *mov = s->priv_data;
2536 int i, j;
2537
2538 for (i = 0; i < s->nb_streams; i++) {
2539 AVStream *st = s->streams[i];
2540 MOVStreamContext *sc = st->priv_data;
2541
2542 av_freep(&sc->ctts_data);
2543 for (j = 0; j < sc->drefs_count; j++) {
2544 av_freep(&sc->drefs[j].path);
2545 av_freep(&sc->drefs[j].dir);
2546 }
2547 av_freep(&sc->drefs);
2548 if (sc->pb && sc->pb != s->pb)
2549 url_fclose(sc->pb);
2550
2551 av_freep(&st->codec->palctrl);
2552 }
2553
2554 if (mov->dv_demux) {
2555 for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2556 av_freep(&mov->dv_fctx->streams[i]->codec);
2557 av_freep(&mov->dv_fctx->streams[i]);
2558 }
2559 av_freep(&mov->dv_fctx);
2560 av_freep(&mov->dv_demux);
2561 }
2562
2563 av_freep(&mov->trex_data);
2564
2565 return 0;
2566 }
2567
2568 AVInputFormat ff_mov_demuxer = {
2569 "mov,mp4,m4a,3gp,3g2,mj2",
2570 NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2571 sizeof(MOVContext),
2572 mov_probe,
2573 mov_read_header,
2574 mov_read_packet,
2575 mov_read_close,
2576 mov_read_seek,
2577 };