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1/*
2 * MOV demuxer
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5 *
6 * first version by Francois Revol <revol@free.fr>
7 * seek function by Gael Chardon <gael.dev@4now.net>
8 *
9 * This file is part of FFmpeg.
10 *
11 * FFmpeg is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * FFmpeg is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with FFmpeg; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26#include <limits.h>
27
28//#define MOV_EXPORT_ALL_METADATA
29
30#include "libavutil/attributes.h"
31#include "libavutil/channel_layout.h"
32#include "libavutil/intreadwrite.h"
33#include "libavutil/intfloat.h"
34#include "libavutil/mathematics.h"
35#include "libavutil/avstring.h"
36#include "libavutil/dict.h"
37#include "libavutil/opt.h"
38#include "libavutil/timecode.h"
39#include "libavcodec/ac3tab.h"
40#include "avformat.h"
41#include "internal.h"
42#include "avio_internal.h"
43#include "riff.h"
44#include "isom.h"
45#include "libavcodec/get_bits.h"
46#include "id3v1.h"
47#include "mov_chan.h"
48#include "seek.h"
49
50#if CONFIG_ZLIB
51#include <zlib.h>
52#endif
53
54#include "qtpalette.h"
55
56
57#undef NDEBUG
58#include <assert.h>
59
60#include "id3v2.h"
61/* those functions parse an atom */
62/* links atom IDs to parse functions */
63typedef struct MOVParseTableEntry {
64 uint32_t type;
65 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
66} MOVParseTableEntry;
67
68static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
69
70static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
71 unsigned len, const char *key)
72{
73 char buf[16];
74
75 short current, total = 0;
76 avio_rb16(pb); // unknown
77 current = avio_rb16(pb);
78 if (len >= 6)
79 total = avio_rb16(pb);
80 if (!total)
81 snprintf(buf, sizeof(buf), "%d", current);
82 else
83 snprintf(buf, sizeof(buf), "%d/%d", current, total);
84 av_dict_set(&c->fc->metadata, key, buf, 0);
85
86 return 0;
87}
88
89static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
90 unsigned len, const char *key)
91{
92 char buf[16];
93
94 /* bypass padding bytes */
95 avio_r8(pb);
96 avio_r8(pb);
97 avio_r8(pb);
98
99 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
100 av_dict_set(&c->fc->metadata, key, buf, 0);
101
102 return 0;
103}
104
105static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
106 unsigned len, const char *key)
107{
108 char buf[16];
109
110 snprintf(buf, sizeof(buf), "%d", avio_r8(pb));
111 av_dict_set(&c->fc->metadata, key, buf, 0);
112
113 return 0;
114}
115
116static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
117 unsigned len, const char *key)
118{
119 short genre;
120 char buf[20];
121
122 avio_r8(pb); // unknown
123
124 genre = avio_r8(pb);
125 if (genre < 1 || genre > ID3v1_GENRE_MAX)
126 return 0;
127 snprintf(buf, sizeof(buf), "%s", ff_id3v1_genre_str[genre-1]);
128 av_dict_set(&c->fc->metadata, key, buf, 0);
129
130 return 0;
131}
132
133static int mov_read_custom_metadata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
134{
135 char key[1024]={0}, data[1024]={0};
136 int i;
137 AVStream *st;
138 MOVStreamContext *sc;
139
140 if (c->fc->nb_streams < 1)
141 return 0;
142 st = c->fc->streams[c->fc->nb_streams-1];
143 sc = st->priv_data;
144
145 if (atom.size <= 8) return 0;
146
147 for (i = 0; i < 3; i++) { // Parse up to three sub-atoms looking for name and data.
148 int data_size = avio_rb32(pb);
149 int tag = avio_rl32(pb);
150 int str_size = 0, skip_size = 0;
151 char *target = NULL;
152
153 switch (tag) {
154 case MKTAG('n','a','m','e'):
155 avio_rb32(pb); // version/flags
156 str_size = skip_size = data_size - 12;
157 atom.size -= 12;
158 target = key;
159 break;
160 case MKTAG('d','a','t','a'):
161 avio_rb32(pb); // version/flags
162 avio_rb32(pb); // reserved (zero)
163 str_size = skip_size = data_size - 16;
164 atom.size -= 16;
165 target = data;
166 break;
167 default:
168 skip_size = data_size - 8;
169 str_size = 0;
170 break;
171 }
172
173 if (target) {
174 str_size = FFMIN3(sizeof(data)-1, str_size, atom.size);
175 avio_read(pb, target, str_size);
176 target[str_size] = 0;
177 }
178 atom.size -= skip_size;
179
180 // If we didn't read the full data chunk for the sub-atom, skip to the end of it.
181 if (skip_size > str_size) avio_skip(pb, skip_size - str_size);
182 }
183
184 if (*key && *data) {
185 if (strcmp(key, "iTunSMPB") == 0) {
186 int priming, remainder, samples;
187 if(sscanf(data, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
188 if(priming>0 && priming<16384)
189 sc->start_pad = priming;
190 return 1;
191 }
192 }
193 if (strcmp(key, "cdec") == 0) {
194// av_dict_set(&st->metadata, key, data, 0);
195 return 1;
196 }
197 }
198 return 0;
199}
200
201static const uint32_t mac_to_unicode[128] = {
202 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
203 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
204 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
205 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
206 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
207 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
208 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
209 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
210 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
211 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
212 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
213 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
214 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
215 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
216 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
217 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
218};
219
220static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
221 char *dst, int dstlen)
222{
223 char *p = dst;
224 char *end = dst+dstlen-1;
225 int i;
226
227 for (i = 0; i < len; i++) {
228 uint8_t t, c = avio_r8(pb);
229 if (c < 0x80 && p < end)
230 *p++ = c;
231 else if (p < end)
232 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
233 }
234 *p = 0;
235 return p - dst;
236}
237
238static int mov_extract_cover_pic(AVFormatContext *s, AVIOContext *pb, int type, int size, char *value)
239{
240 if(s->cover_data){
241 av_log(s, AV_LOG_INFO, "Extract cover picture in other atom!\n");
242 return 0;
243 }
244
245 s->cover_data = av_malloc(size);
246 if(!s->cover_data){
247 av_log(s, AV_LOG_INFO, "no memery, av_alloc failed!\n");
248 return -1;
249 }
250 s->cover_data_len = size;
251 avio_read(pb, s->cover_data, size);
252
253 if (type == 13)
254 strcpy(value, "image/jpeg"); // jpeg
255 else if (type == 14)
256 strcpy(value, "image/png"); // png
257
258 return 0;
259}
260
261static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
262{
263 AVPacket pkt;
264 AVStream *st;
265 MOVStreamContext *sc;
266 enum AVCodecID id;
267 int ret;
268
269 switch (type) {
270 case 0xd: id = AV_CODEC_ID_MJPEG; break;
271 case 0xe: id = AV_CODEC_ID_PNG; break;
272 case 0x1b: id = AV_CODEC_ID_BMP; break;
273 default:
274 av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
275 avio_skip(pb, len);
276 return 0;
277 }
278
279 st = avformat_new_stream(c->fc, NULL);
280 if (!st)
281 return AVERROR(ENOMEM);
282 sc = av_mallocz(sizeof(*sc));
283 if (!sc)
284 return AVERROR(ENOMEM);
285 st->priv_data = sc;
286
287 ret = av_get_packet(pb, &pkt, len);
288 if (ret < 0)
289 return ret;
290
291 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
292
293 st->attached_pic = pkt;
294 st->attached_pic.stream_index = st->index;
295 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
296
297 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
298 st->codec->codec_id = id;
299
300 return 0;
301}
302
303static int mov_metadata_raw(MOVContext *c, AVIOContext *pb,
304 unsigned len, const char *key)
305{
306 char *value = av_malloc(len + 1);
307 if (!value)
308 return AVERROR(ENOMEM);
309 avio_read(pb, value, len);
310 value[len] = 0;
311 return av_dict_set(&c->fc->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
312}
313
314static int mov_metadata_3gpp_general(MOVContext *c, AVIOContext *pb,
315 unsigned len, const char *key)
316{
317 char key2[16];
318 uint8_t version;
319 uint32_t flags;
320 uint8_t pad;
321 uint16_t langcode;
322 uint16_t shortbytes;
323 char language[4] = {0};
324 char byte = 0;
325 char str[128] = {0};
326 int offset = 0;
327 uint16_t byteOrderMark = 0;
328
329 version = avio_r8(pb); // version
330 flags = avio_rb24(pb); //flags
331 shortbytes = avio_rb16(pb);
332 pad = (shortbytes & 0x8000) >> 15;
333 langcode = shortbytes & 0x7ffff;
334 ff_mov_lang_to_iso639(langcode, language);
335 len -= 6;
336
337 //read BYTE ORDER MARK
338 byteOrderMark = avio_rb16(pb);
339 if (byteOrderMark == 0xFEFF) {//UTF-16BE
340 len -= 2;
341 offset += 2;
342 avio_get_str16be(pb, len, str, 128);
343 av_dict_set(&c->fc->metadata, key, str, 0);
344 } else if (byteOrderMark == 0xFFFE) {//UTF-16LE
345 len -= 2;
346 offset += 2;
347 avio_get_str16le(pb, len, str, 128);
348 av_dict_set(&c->fc->metadata, key, str, 0);
349 } else { //not BYTE ORDER MARK,UTF-8 format
350 avio_seek(pb, -2, SEEK_CUR);
351 avio_read(pb, str+offset, len);
352 str[len] = 0;
353 av_dict_set(&c->fc->metadata, key, str, 0);
354 if (*language && strcmp(language, "und")) {
355 snprintf(key2, sizeof(key2), "%s-%s", key, language);
356 av_dict_set(&c->fc->metadata, key2, str, 0);
357 }
358 }
359 return 0;
360}
361
362static int mov_metadata_3gpp_yrrc(MOVContext *c, AVIOContext *pb,
363 unsigned len, const char *key)
364{
365 uint8_t version;
366 uint32_t flags;
367 char byte = 0;
368 char str[128] = {0};
369 char year[32] = {0};
370 uint16_t yearCode = 0;
371
372 version = avio_r8(pb); // version
373 flags = avio_rb24(pb); //flags
374 len -= 4;
375
376 //get the year when the media was recorded
377 yearCode = avio_rb16(pb);
378 snprintf(year, sizeof(year), "%d", yearCode);
379 av_dict_set(&c->fc->metadata, key, year, 0);
380
381 return 0;
382}
383
384static int mov_metadata_3gpp_album(MOVContext *c, AVIOContext *pb,
385 unsigned len, const char *key)
386{
387 char key2[16];
388 uint8_t version;
389 uint32_t flags;
390 uint8_t pad;
391 uint16_t langcode;
392 uint16_t shortbytes;
393 char language[4] = {0};
394 char byte = 0;
395 int read_byte = 0;
396 char str[128] = {0};
397 int offset = 0;
398 uint16_t byteOrderMark = 0;
399 uint8_t trackNum[16] ={0};
400
401 version = avio_r8(pb); // version
402 flags = avio_rb24(pb); //flags
403 shortbytes = avio_rb16(pb);
404 pad = (shortbytes & 0x8000) >> 15; //pad
405 langcode = shortbytes & 0x7ffff; //language
406 ff_mov_lang_to_iso639(langcode, language);
407 len -= 6;
408
409 //get track num
410 do {
411 byte = avio_r8(pb);
412 read_byte++;
413 } while(byte != '\0');
414 byte = avio_r8(pb);
415 read_byte++;
416 snprintf(trackNum, sizeof(trackNum), "%d", byte);
417 av_dict_set(&c->fc->metadata, "track", trackNum, 0);
418
419 //seek back to get Text of album title
420 avio_seek(pb, -read_byte, SEEK_CUR);
421
422 //read BYTE ORDER MARK
423 byteOrderMark = avio_rb16(pb);
424 if (byteOrderMark == 0xFEFF) {//UTF-16BE
425 len -= 2;
426 offset += 2;
427 avio_get_str16be(pb, len, str, 128);
428 av_dict_set(&c->fc->metadata, key, str, 0);
429 } else if (byteOrderMark == 0xFFFE) {//UTF-16LE
430 len -= 2;
431 offset += 2;
432 avio_get_str16le(pb, len, str, 128);
433 av_dict_set(&c->fc->metadata, key, str, 0);
434 } else { //not BYTE ORDER MARK,UTF-8 format
435 avio_seek(pb, -2, SEEK_CUR);
436 avio_read(pb, str+offset, len);
437 str[len] = 0;
438 av_dict_set(&c->fc->metadata, key, str, 0);
439 if (*language && strcmp(language, "und")) {
440 snprintf(key2, sizeof(key2), "%s-%s", key, language);
441 av_dict_set(&c->fc->metadata, key2, str, 0);
442 }
443 }
444
445 return 0;
446}
447
448static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
449{
450#ifdef MOV_EXPORT_ALL_METADATA
451 char tmp_key[5];
452#endif
453 char str[1024], key2[16], language[4] = {0};
454 const char *key = NULL;
455 uint16_t langcode = 0;
456 uint32_t data_type = 0, str_size;
457 uint32_t cover_size = 0;
458 int skip_read = 0;
459 int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
460
461 if (c->itunes_metadata && atom.type == MKTAG('-','-','-','-'))
462 return mov_read_custom_metadata(c, pb, atom);
463
464 switch (atom.type) {
465 case MKTAG('t', 'i', 't', 'l'):
466 key = "title";
467 skip_read = 1;
468 parse = mov_metadata_3gpp_general;
469 break;
470 case MKTAG('a', 'l', 'b', 'm'):
471 key = "album";
472 skip_read = 1;
473 parse = mov_metadata_3gpp_album;
474 break;
475 case MKTAG('d', 's', 'c', 'p'):
476 key = "description";
477 skip_read = 1;
478 parse = mov_metadata_3gpp_general;
479 break;
480 case MKTAG('p', 'e', 'r', 'f'):
481 key = "artist";
482 skip_read = 1;
483 parse = mov_metadata_3gpp_general;
484 break;
485 case MKTAG('y', 'r', 'r', 'c'):
486 key = "year";
487 skip_read = 1;
488 parse = mov_metadata_3gpp_yrrc;
489 break;
490
491 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
492 case MKTAG(0xa9,'a','u','t'):
493 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
494 case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
495 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
496 case MKTAG( 'c','p','r','t'):
497 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
498 case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
499 case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
500 case MKTAG(0xa9,'c','m','t'):
501 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
502 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
503 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
504 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
505 case MKTAG( 'g','n','r','e'): key = "genre";
506 parse = mov_metadata_gnre; break;
507 case MKTAG(0xa9,'t','o','o'):
508 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
509 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
510 case MKTAG(0xa9,'m','a','k'): key = "make"; break;
511 case MKTAG(0xa9,'m','o','d'): key = "model"; break;
512 case MKTAG(0xa9,'x','y','z'): key = "location"; break;
513 case MKTAG( 'd','e','s','c'): key = "description";break;
514 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
515 case MKTAG( 't','v','s','h'): key = "show"; break;
516 case MKTAG( 't','v','e','n'): key = "episode_id";break;
517 case MKTAG( 't','v','n','n'): key = "network"; break;
518 case MKTAG( 't','r','k','n'): key = "track";
519 parse = mov_metadata_track_or_disc_number; break;
520 case MKTAG( 'd','i','s','k'): key = "disc";
521 parse = mov_metadata_track_or_disc_number; break;
522 case MKTAG( 't','v','e','s'): key = "episode_sort";
523 parse = mov_metadata_int8_bypass_padding; break;
524 case MKTAG( 't','v','s','n'): key = "season_number";
525 parse = mov_metadata_int8_bypass_padding; break;
526 case MKTAG( 's','t','i','k'): key = "media_type";
527 parse = mov_metadata_int8_no_padding; break;
528 case MKTAG( 'h','d','v','d'): key = "hd_video";
529 parse = mov_metadata_int8_no_padding; break;
530 case MKTAG( 'p','g','a','p'): key = "gapless_playback";
531 parse = mov_metadata_int8_no_padding; break;
532 case MKTAG( '@','P','R','M'):
533 return mov_metadata_raw(c, pb, atom.size, "premiere_version");
534 case MKTAG( '@','P','R','Q'):
535 return mov_metadata_raw(c, pb, atom.size, "quicktime_version");
536 }
537
538 if (c->itunes_metadata && atom.size > 8) {
539 int data_size = avio_rb32(pb);
540 int tag = avio_rl32(pb);
541 if (tag == MKTAG('d','a','t','a')) {
542 data_type = avio_rb32(pb); // type
543 avio_rb32(pb); // unknown
544 str_size = data_size - 16;
545 cover_size = data_size -16;
546 atom.size -= 16;
547
548 if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
549 int ret = mov_read_covr(c, pb, data_type, str_size);
550 if (ret < 0) {
551 av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
552 return ret;
553 }
554 }
555 } else return 0;
556 } else if (atom.size > 4 && key && !c->itunes_metadata) {
557 if (skip_read) {
558 str_size = atom.size;
559 }
560 else{
561 str_size = avio_rb16(pb); // string length
562 langcode = avio_rb16(pb);
563 ff_mov_lang_to_iso639(langcode, language);
564 atom.size -= 4;
565 }
566 } else
567 str_size = atom.size;
568
569#ifdef MOV_EXPORT_ALL_METADATA
570 if (!key) {
571 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
572 key = tmp_key;
573 }
574#endif
575
576 if (!key)
577 return 0;
578 if (atom.size < 0)
579 return AVERROR_INVALIDDATA;
580
581 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
582
583 if (parse)
584 parse(c, pb, str_size, key);
585 else {
586 if (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff))) { // MAC Encoded
587 mov_read_mac_string(c, pb, str_size, str, sizeof(str));
588 } else if (data_type == 13 || data_type == 14){
589 mov_extract_cover_pic(c->fc, pb, data_type, cover_size, str);
590 } else {
591 avio_read(pb, str, str_size);
592 str[str_size] = 0;
593 }
594 // Android MP4 writer put an additional '/' at the end, discard it.
595 // The CTS test seems the added '/' is not needed.
596 if ((atom.type == MKTAG(0xa9,'x','y','z')) && (str[str_size-1] == 0x2f)) {
597 str[str_size-1] = 0;
598 }
599 av_dict_set(&c->fc->metadata, key, str, 0);
600 if (*language && strcmp(language, "und")) {
601 snprintf(key2, sizeof(key2), "%s-%s", key, language);
602 av_dict_set(&c->fc->metadata, key2, str, 0);
603 }
604 }
605 av_dlog(c->fc, "lang \"%3s\" ", language);
606 av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
607 key, str, (char*)&atom.type, str_size, atom.size);
608
609 return 0;
610}
611
612static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
613{
614 int64_t start;
615 int i, nb_chapters, str_len, version;
616 char str[256+1];
617
618 if ((atom.size -= 5) < 0)
619 return 0;
620
621 version = avio_r8(pb);
622 avio_rb24(pb);
623 if (version)
624 avio_rb32(pb); // ???
625 nb_chapters = avio_r8(pb);
626
627 for (i = 0; i < nb_chapters; i++) {
628 if (atom.size < 9)
629 return 0;
630
631 start = avio_rb64(pb);
632 str_len = avio_r8(pb);
633
634 if ((atom.size -= 9+str_len) < 0)
635 return 0;
636
637 avio_read(pb, str, str_len);
638 str[str_len] = 0;
639 avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
640 }
641 return 0;
642}
643
644#define MIN_DATA_ENTRY_BOX_SIZE 12
645static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
646{
647 AVStream *st;
648 MOVStreamContext *sc;
649 int entries, i, j;
650
651 if (c->fc->nb_streams < 1)
652 return 0;
653 st = c->fc->streams[c->fc->nb_streams-1];
654 sc = st->priv_data;
655
656 avio_rb32(pb); // version + flags
657 entries = avio_rb32(pb);
658 if (entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
659 entries >= UINT_MAX / sizeof(*sc->drefs))
660 return AVERROR_INVALIDDATA;
661 av_free(sc->drefs);
662 sc->drefs_count = 0;
663 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
664 if (!sc->drefs)
665 return AVERROR(ENOMEM);
666 sc->drefs_count = entries;
667
668 for (i = 0; i < sc->drefs_count; i++) {
669 MOVDref *dref = &sc->drefs[i];
670 uint32_t size = avio_rb32(pb);
671 int64_t next = avio_tell(pb) + size - 4;
672
673 if (size < 12)
674 return AVERROR_INVALIDDATA;
675
676 dref->type = avio_rl32(pb);
677 avio_rb32(pb); // version + flags
678 av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
679
680 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
681 /* macintosh alias record */
682 uint16_t volume_len, len;
683 int16_t type;
684
685 avio_skip(pb, 10);
686
687 volume_len = avio_r8(pb);
688 volume_len = FFMIN(volume_len, 27);
689 avio_read(pb, dref->volume, 27);
690 dref->volume[volume_len] = 0;
691 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
692
693 avio_skip(pb, 12);
694
695 len = avio_r8(pb);
696 len = FFMIN(len, 63);
697 avio_read(pb, dref->filename, 63);
698 dref->filename[len] = 0;
699 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
700
701 avio_skip(pb, 16);
702
703 /* read next level up_from_alias/down_to_target */
704 dref->nlvl_from = avio_rb16(pb);
705 dref->nlvl_to = avio_rb16(pb);
706 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
707 dref->nlvl_from, dref->nlvl_to);
708
709 avio_skip(pb, 16);
710
711 for (type = 0; type != -1 && avio_tell(pb) < next; ) {
712 if(url_feof(pb))
713 return AVERROR_EOF;
714 type = avio_rb16(pb);
715 len = avio_rb16(pb);
716 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
717 if (len&1)
718 len += 1;
719 if (type == 2) { // absolute path
720 av_free(dref->path);
721 dref->path = av_mallocz(len+1);
722 if (!dref->path)
723 return AVERROR(ENOMEM);
724 avio_read(pb, dref->path, len);
725 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
726 len -= volume_len;
727 memmove(dref->path, dref->path+volume_len, len);
728 dref->path[len] = 0;
729 }
730 for (j = 0; j < len; j++)
731 if (dref->path[j] == ':')
732 dref->path[j] = '/';
733 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
734 } else if (type == 0) { // directory name
735 av_free(dref->dir);
736 dref->dir = av_malloc(len+1);
737 if (!dref->dir)
738 return AVERROR(ENOMEM);
739 avio_read(pb, dref->dir, len);
740 dref->dir[len] = 0;
741 for (j = 0; j < len; j++)
742 if (dref->dir[j] == ':')
743 dref->dir[j] = '/';
744 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
745 } else
746 avio_skip(pb, len);
747 }
748 }
749 avio_seek(pb, next, SEEK_SET);
750 }
751 return 0;
752}
753
754static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
755{
756 AVStream *st;
757 uint32_t type;
758 uint32_t av_unused ctype;
759 int title_size;
760 char *title_str;
761
762 if (c->fc->nb_streams < 1) // meta before first trak
763 return 0;
764
765 st = c->fc->streams[c->fc->nb_streams-1];
766
767 avio_r8(pb); /* version */
768 avio_rb24(pb); /* flags */
769
770 /* component type */
771 ctype = avio_rl32(pb);
772 type = avio_rl32(pb); /* component subtype */
773
774 av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
775 av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
776
777 if (type == MKTAG('v','i','d','e'))
778 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
779 else if (type == MKTAG('s','o','u','n'))
780 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
781 else if (type == MKTAG('m','1','a',' '))
782 st->codec->codec_id = AV_CODEC_ID_MP2;
783 else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
784 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
785
786 avio_rb32(pb); /* component manufacture */
787 avio_rb32(pb); /* component flags */
788 avio_rb32(pb); /* component flags mask */
789
790 title_size = atom.size - 24;
791 if (title_size > 0) {
792 title_str = av_malloc(title_size + 1); /* Add null terminator */
793 if (!title_str)
794 return AVERROR(ENOMEM);
795 avio_read(pb, title_str, title_size);
796 title_str[title_size] = 0;
797 if (title_str[0])
798 av_dict_set(&st->metadata, "handler_name", title_str +
799 (!c->isom && title_str[0] == title_size - 1), 0);
800 av_freep(&title_str);
801 }
802
803 return 0;
804}
805
806int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
807{
808 AVStream *st;
809 int tag;
810
811 if (fc->nb_streams < 1)
812 return 0;
813 st = fc->streams[fc->nb_streams-1];
814
815 avio_rb32(pb); /* version + flags */
816 ff_mp4_read_descr(fc, pb, &tag);
817 if (tag == MP4ESDescrTag) {
818 ff_mp4_parse_es_descr(pb, NULL);
819 } else
820 avio_rb16(pb); /* ID */
821
822 ff_mp4_read_descr(fc, pb, &tag);
823 if (tag == MP4DecConfigDescrTag)
824 ff_mp4_read_dec_config_descr(fc, st, pb);
825 return 0;
826}
827
828static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
829{
830 return ff_mov_read_esds(c->fc, pb, atom);
831}
832
833static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
834{
835 AVStream *st;
836 int ac3info, acmod, lfeon, bsmod;
837
838 if (c->fc->nb_streams < 1)
839 return 0;
840 st = c->fc->streams[c->fc->nb_streams-1];
841
842 ac3info = avio_rb24(pb);
843 bsmod = (ac3info >> 14) & 0x7;
844 acmod = (ac3info >> 11) & 0x7;
845 lfeon = (ac3info >> 10) & 0x1;
846 st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
847 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
848 if (lfeon)
849 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
850 st->codec->audio_service_type = bsmod;
851 if (st->codec->channels > 1 && bsmod == 0x7)
852 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
853
854 return 0;
855}
856
857static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
858{
859 AVStream *st;
860 int eac3info, acmod, lfeon, bsmod;
861
862 if (c->fc->nb_streams < 1)
863 return 0;
864 st = c->fc->streams[c->fc->nb_streams-1];
865
866 /* No need to parse fields for additional independent substreams and its
867 * associated dependent substreams since libavcodec's E-AC-3 decoder
868 * does not support them yet. */
869 avio_rb16(pb); /* data_rate and num_ind_sub */
870 eac3info = avio_rb24(pb);
871 bsmod = (eac3info >> 12) & 0x1f;
872 acmod = (eac3info >> 9) & 0x7;
873 lfeon = (eac3info >> 8) & 0x1;
874 st->codec->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
875 if (lfeon)
876 st->codec->channel_layout |= AV_CH_LOW_FREQUENCY;
877 st->codec->channels = av_get_channel_layout_nb_channels(st->codec->channel_layout);
878 st->codec->audio_service_type = bsmod;
879 if (st->codec->channels > 1 && bsmod == 0x7)
880 st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
881
882 return 0;
883}
884
885static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
886{
887 AVStream *st;
888
889 if (c->fc->nb_streams < 1)
890 return 0;
891 st = c->fc->streams[c->fc->nb_streams-1];
892
893 if (atom.size < 16)
894 return 0;
895
896 /* skip version and flags */
897 avio_skip(pb, 4);
898
899 ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
900
901 return 0;
902}
903
904static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
905{
906 AVStream *st;
907
908 if (c->fc->nb_streams < 1)
909 return 0;
910 st = c->fc->streams[c->fc->nb_streams-1];
911
912 if (ff_get_wav_header(pb, st->codec, atom.size) < 0) {
913 av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
914 }
915
916 return 0;
917}
918
919static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
920{
921 const int num = avio_rb32(pb);
922 const int den = avio_rb32(pb);
923 AVStream *st;
924
925 if (c->fc->nb_streams < 1)
926 return 0;
927 st = c->fc->streams[c->fc->nb_streams-1];
928
929 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
930 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
931 av_log(c->fc, AV_LOG_WARNING,
932 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
933 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
934 num, den);
935 } else if (den != 0) {
936 st->sample_aspect_ratio.num = num;
937 st->sample_aspect_ratio.den = den;
938 }
939 return 0;
940}
941
942/* this atom contains actual media data */
943static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
944{
945 if (atom.size == 0) /* wrong one (MP4) */
946 return 0;
947 c->found_mdat=1;
948 return 0; /* now go for moov */
949}
950
951/* read major brand, minor version and compatible brands and store them as metadata */
952static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
953{
954 uint32_t minor_ver;
955 int comp_brand_size;
956 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
957 char* comp_brands_str;
958 uint8_t type[5] = {0};
959
960 avio_read(pb, type, 4);
961 if (strcmp(type, "qt "))
962 c->isom = 1;
963 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
964 av_dict_set(&c->fc->metadata, "major_brand", type, 0);
965 minor_ver = avio_rb32(pb); /* minor version */
966 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
967 av_dict_set(&c->fc->metadata, "minor_version", minor_ver_str, 0);
968
969 comp_brand_size = atom.size - 8;
970 if (comp_brand_size < 0)
971 return AVERROR_INVALIDDATA;
972 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
973 if (!comp_brands_str)
974 return AVERROR(ENOMEM);
975 avio_read(pb, comp_brands_str, comp_brand_size);
976 comp_brands_str[comp_brand_size] = 0;
977 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
978 av_freep(&comp_brands_str);
979
980 return 0;
981}
982
983/* this atom should contain all header atoms */
984static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
985{
986 int ret;
987
988 if (c->found_moov) {
989 av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
990 avio_skip(pb, atom.size);
991 return 0;
992 }
993
994 if ((ret = mov_read_default(c, pb, atom)) < 0)
995 return ret;
996 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
997 /* so we don't parse the whole file if over a network */
998 c->found_moov=1;
999 return 0; /* now go for mdat */
1000}
1001
1002static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1003{
1004 c->fragment.moof_offset = avio_tell(pb) - 8;
1005 av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1006 return mov_read_default(c, pb, atom);
1007}
1008
1009static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1010{
1011 char buffer[32];
1012 if (time) {
1013 struct tm *ptm;
1014 time_t timet;
1015 if(time >= 2082844800)
1016 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1017 timet = time;
1018 ptm = gmtime(&timet);
1019 if (!ptm) return;
1020 strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
1021 av_dict_set(metadata, "creation_time", buffer, 0);
1022 }
1023}
1024
1025static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1026{
1027 AVStream *st;
1028 MOVStreamContext *sc;
1029 int version;
1030 char language[4] = {0};
1031 unsigned lang;
1032 int64_t creation_time;
1033
1034 if (c->fc->nb_streams < 1)
1035 return 0;
1036 st = c->fc->streams[c->fc->nb_streams-1];
1037 sc = st->priv_data;
1038
1039 if (sc->time_scale) {
1040 av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1041 return AVERROR_INVALIDDATA;
1042 }
1043
1044 version = avio_r8(pb);
1045 if (version > 1) {
1046 avpriv_request_sample(c->fc, "Version %d", version);
1047 return AVERROR_PATCHWELCOME;
1048 }
1049 avio_rb24(pb); /* flags */
1050 if (version == 1) {
1051 creation_time = avio_rb64(pb);
1052 avio_rb64(pb);
1053 } else {
1054 creation_time = avio_rb32(pb);
1055 avio_rb32(pb); /* modification time */
1056 }
1057 mov_metadata_creation_time(&st->metadata, creation_time);
1058
1059 sc->time_scale = avio_rb32(pb);
1060 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1061
1062 lang = avio_rb16(pb); /* language */
1063 if (ff_mov_lang_to_iso639(lang, language))
1064 av_dict_set(&st->metadata, "language", language, 0);
1065 avio_rb16(pb); /* quality */
1066
1067 return 0;
1068}
1069
1070static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1071{
1072 int64_t creation_time;
1073 int version = avio_r8(pb); /* version */
1074 avio_rb24(pb); /* flags */
1075
1076 if (version == 1) {
1077 creation_time = avio_rb64(pb);
1078 avio_rb64(pb);
1079 } else {
1080 creation_time = avio_rb32(pb);
1081 avio_rb32(pb); /* modification time */
1082 }
1083 mov_metadata_creation_time(&c->fc->metadata, creation_time);
1084 c->time_scale = avio_rb32(pb); /* time scale */
1085
1086 av_dlog(c->fc, "time scale = %i\n", c->time_scale);
1087
1088 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1089 // set the AVCodecContext duration because the duration of individual tracks
1090 // may be inaccurate
1091 if (c->time_scale > 0 && !c->trex_data)
1092 c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
1093 avio_rb32(pb); /* preferred scale */
1094
1095 avio_rb16(pb); /* preferred volume */
1096
1097 avio_skip(pb, 10); /* reserved */
1098
1099 avio_skip(pb, 36); /* display matrix */
1100
1101 avio_rb32(pb); /* preview time */
1102 avio_rb32(pb); /* preview duration */
1103 avio_rb32(pb); /* poster time */
1104 avio_rb32(pb); /* selection time */
1105 avio_rb32(pb); /* selection duration */
1106 avio_rb32(pb); /* current time */
1107 avio_rb32(pb); /* next track ID */
1108 return 0;
1109}
1110
1111static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1112{
1113 AVStream *st;
1114 int little_endian;
1115
1116 if (c->fc->nb_streams < 1)
1117 return 0;
1118 st = c->fc->streams[c->fc->nb_streams-1];
1119
1120 little_endian = avio_rb16(pb) & 0xFF;
1121 av_dlog(c->fc, "enda %d\n", little_endian);
1122 if (little_endian == 1) {
1123 switch (st->codec->codec_id) {
1124 case AV_CODEC_ID_PCM_S24BE:
1125 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1126 break;
1127 case AV_CODEC_ID_PCM_S32BE:
1128 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1129 break;
1130 case AV_CODEC_ID_PCM_F32BE:
1131 st->codec->codec_id = AV_CODEC_ID_PCM_F32LE;
1132 break;
1133 case AV_CODEC_ID_PCM_F64BE:
1134 st->codec->codec_id = AV_CODEC_ID_PCM_F64LE;
1135 break;
1136 default:
1137 break;
1138 }
1139 }
1140 return 0;
1141}
1142
1143static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1144{
1145 AVStream *st;
1146 unsigned mov_field_order;
1147 enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1148
1149 if (c->fc->nb_streams < 1) // will happen with jp2 files
1150 return 0;
1151 st = c->fc->streams[c->fc->nb_streams-1];
1152 if (atom.size < 2)
1153 return AVERROR_INVALIDDATA;
1154 mov_field_order = avio_rb16(pb);
1155 if ((mov_field_order & 0xFF00) == 0x0100)
1156 decoded_field_order = AV_FIELD_PROGRESSIVE;
1157 else if ((mov_field_order & 0xFF00) == 0x0200) {
1158 switch (mov_field_order & 0xFF) {
1159 case 0x01: decoded_field_order = AV_FIELD_TT;
1160 break;
1161 case 0x06: decoded_field_order = AV_FIELD_BB;
1162 break;
1163 case 0x09: decoded_field_order = AV_FIELD_TB;
1164 break;
1165 case 0x0E: decoded_field_order = AV_FIELD_BT;
1166 break;
1167 }
1168 }
1169 if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1170 av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1171 }
1172 st->codec->field_order = decoded_field_order;
1173
1174 return 0;
1175}
1176
1177/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
1178static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1179 enum AVCodecID codec_id)
1180{
1181 AVStream *st;
1182 uint64_t size;
1183 uint8_t *buf;
1184 int err;
1185
1186 if (c->fc->nb_streams < 1) // will happen with jp2 files
1187 return 0;
1188 st= c->fc->streams[c->fc->nb_streams-1];
1189
1190 if (st->codec->codec_id != codec_id)
1191 return 0; /* unexpected codec_id - don't mess with extradata */
1192
1193 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
1194 if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1195 return AVERROR_INVALIDDATA;
1196 if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
1197 st->codec->extradata_size = 0;
1198 return err;
1199 }
1200 buf = st->codec->extradata + st->codec->extradata_size;
1201 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
1202 AV_WB32( buf , atom.size + 8);
1203 AV_WL32( buf + 4, atom.type);
1204 avio_read(pb, buf + 8, atom.size);
1205 return 0;
1206}
1207
1208/* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1209static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1210{
1211 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1212}
1213
1214static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1215{
1216 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1217}
1218
1219static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1220{
1221 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1222}
1223
1224static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1225{
1226 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1227}
1228
1229static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1230{
1231 int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1232
1233 if (!ret && c->fc->nb_streams >= 1) {
1234 AVCodecContext *avctx = c->fc->streams[c->fc->nb_streams-1]->codec;
1235 if (avctx->extradata_size >= 40) {
1236 avctx->height = AV_RB16(&avctx->extradata[36]);
1237 avctx->width = AV_RB16(&avctx->extradata[38]);
1238 }
1239 }
1240 return ret;
1241}
1242
1243static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1244{
1245 AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
1246 if (codec->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1247 codec->codec_id == AV_CODEC_ID_H264 &&
1248 atom.size > 11) {
1249 avio_skip(pb, 10);
1250 /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1251 if (avio_rb16(pb) == 0xd4d)
1252 codec->width = 1440;
1253 return 0;
1254 }
1255
1256 return mov_read_avid(c, pb, atom);
1257}
1258
1259static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1260{
1261 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1262}
1263
1264static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1265{
1266 AVStream *st;
1267
1268 if (c->fc->nb_streams < 1)
1269 return 0;
1270 st = c->fc->streams[c->fc->nb_streams-1];
1271
1272 if ((uint64_t)atom.size > (1<<30))
1273 return AVERROR_INVALIDDATA;
1274
1275 if (st->codec->codec_id == AV_CODEC_ID_QDM2 ||
1276 st->codec->codec_id == AV_CODEC_ID_QDMC ||
1277 st->codec->codec_id == AV_CODEC_ID_SPEEX) {
1278 // pass all frma atom to codec, needed at least for QDMC and QDM2
1279 av_free(st->codec->extradata);
1280 if (ff_alloc_extradata(st->codec, atom.size))
1281 return AVERROR(ENOMEM);
1282 avio_read(pb, st->codec->extradata, atom.size);
1283 } else if (atom.size > 8) { /* to read frma, esds atoms */
1284 int ret;
1285 if ((ret = mov_read_default(c, pb, atom)) < 0)
1286 return ret;
1287 } else
1288 avio_skip(pb, atom.size);
1289 return 0;
1290}
1291
1292/**
1293 * This function reads atom content and puts data in extradata without tag
1294 * nor size unlike mov_read_extradata.
1295 */
1296static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1297{
1298 AVStream *st;
1299
1300 if (c->fc->nb_streams < 1)
1301 return 0;
1302 st = c->fc->streams[c->fc->nb_streams-1];
1303
1304 if ((uint64_t)atom.size > (1<<30))
1305 return AVERROR_INVALIDDATA;
1306
1307 if (atom.size >= 10) {
1308 // Broken files created by legacy versions of libavformat will
1309 // wrap a whole fiel atom inside of a glbl atom.
1310 unsigned size = avio_rb32(pb);
1311 unsigned type = avio_rl32(pb);
1312 avio_seek(pb, -8, SEEK_CUR);
1313 if (type == MKTAG('f','i','e','l') && size == atom.size)
1314 return mov_read_default(c, pb, atom);
1315 }
1316 av_free(st->codec->extradata);
1317 if (ff_alloc_extradata(st->codec, atom.size))
1318 return AVERROR(ENOMEM);
1319 avio_read(pb, st->codec->extradata, atom.size);
1320 return 0;
1321}
1322
1323static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1324{
1325 AVStream *st;
1326 uint8_t profile_level;
1327
1328 if (c->fc->nb_streams < 1)
1329 return 0;
1330 st = c->fc->streams[c->fc->nb_streams-1];
1331
1332 if (atom.size >= (1<<28) || atom.size < 7)
1333 return AVERROR_INVALIDDATA;
1334
1335 profile_level = avio_r8(pb);
1336 if ((profile_level & 0xf0) != 0xc0)
1337 return 0;
1338
1339 av_free(st->codec->extradata);
1340 if (ff_alloc_extradata(st->codec, atom.size - 7))
1341 return AVERROR(ENOMEM);
1342 avio_seek(pb, 6, SEEK_CUR);
1343 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
1344 return 0;
1345}
1346
1347/**
1348 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1349 * but can have extradata appended at the end after the 40 bytes belonging
1350 * to the struct.
1351 */
1352static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1353{
1354 AVStream *st;
1355
1356 if (c->fc->nb_streams < 1)
1357 return 0;
1358 if (atom.size <= 40)
1359 return 0;
1360 st = c->fc->streams[c->fc->nb_streams-1];
1361
1362 if ((uint64_t)atom.size > (1<<30))
1363 return AVERROR_INVALIDDATA;
1364
1365 av_free(st->codec->extradata);
1366 if (ff_alloc_extradata(st->codec, atom.size - 40))
1367 return AVERROR(ENOMEM);
1368 avio_skip(pb, 40);
1369 avio_read(pb, st->codec->extradata, atom.size - 40);
1370 return 0;
1371}
1372
1373static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1374{
1375 AVStream *st;
1376 MOVStreamContext *sc;
1377 unsigned int i, entries;
1378
1379 if (c->fc->nb_streams < 1)
1380 return 0;
1381 st = c->fc->streams[c->fc->nb_streams-1];
1382 sc = st->priv_data;
1383
1384 avio_r8(pb); /* version */
1385 avio_rb24(pb); /* flags */
1386
1387 entries = avio_rb32(pb);
1388
1389 if (!entries)
1390 return 0;
1391 if (entries >= UINT_MAX/sizeof(int64_t))
1392 return AVERROR_INVALIDDATA;
1393
1394 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
1395 if (!sc->chunk_offsets)
1396 return AVERROR(ENOMEM);
1397 sc->chunk_count = entries;
1398
1399 if (atom.type == MKTAG('s','t','c','o'))
1400 for (i = 0; i < entries && !pb->eof_reached; i++)
1401 sc->chunk_offsets[i] = avio_rb32(pb);
1402 else if (atom.type == MKTAG('c','o','6','4'))
1403 for (i = 0; i < entries && !pb->eof_reached; i++)
1404 sc->chunk_offsets[i] = avio_rb64(pb);
1405 else
1406 return AVERROR_INVALIDDATA;
1407
1408 sc->chunk_count = i;
1409
1410 if (pb->eof_reached)
1411 return AVERROR_EOF;
1412
1413 return 0;
1414}
1415
1416/**
1417 * Compute codec id for 'lpcm' tag.
1418 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1419 */
1420enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1421{
1422 /* lpcm flags:
1423 * 0x1 = float
1424 * 0x2 = big-endian
1425 * 0x4 = signed
1426 */
1427 return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1428}
1429
1430static int mov_codec_id(AVStream *st, uint32_t format)
1431{
1432 int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1433
1434 if (id <= 0 &&
1435 ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1436 (format & 0xFFFF) == 'T' + ('S' << 8)))
1437 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1438
1439 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1440 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1441 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO &&
1442 /* skip old asf mpeg4 tag */
1443 format && format != MKTAG('m','p','4','s')) {
1444 id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1445 if (id <= 0)
1446 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1447 if (id > 0)
1448 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1449 else if (st->codec->codec_type == AVMEDIA_TYPE_DATA ||
1450 (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1451 st->codec->codec_id == AV_CODEC_ID_NONE)) {
1452 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1453 if (id > 0)
1454 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1455 }
1456 }
1457
1458 st->codec->codec_tag = format;
1459
1460 return id;
1461}
1462
1463static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1464 AVStream *st, MOVStreamContext *sc)
1465{
1466 unsigned int color_depth, len, j;
1467 int color_greyscale;
1468 int color_table_id;
1469
1470 avio_rb16(pb); /* version */
1471 avio_rb16(pb); /* revision level */
1472 avio_rb32(pb); /* vendor */
1473 avio_rb32(pb); /* temporal quality */
1474 avio_rb32(pb); /* spatial quality */
1475
1476 st->codec->width = avio_rb16(pb); /* width */
1477 st->codec->height = avio_rb16(pb); /* height */
1478
1479 avio_rb32(pb); /* horiz resolution */
1480 avio_rb32(pb); /* vert resolution */
1481 avio_rb32(pb); /* data size, always 0 */
1482 avio_rb16(pb); /* frames per samples */
1483
1484 len = avio_r8(pb); /* codec name, pascal string */
1485 if (len > 31)
1486 len = 31;
1487 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1488 if (len < 31)
1489 avio_skip(pb, 31 - len);
1490 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1491 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1492 st->codec->codec_tag = MKTAG('I', '4', '2', '0');
1493 st->codec->width &= ~1;
1494 st->codec->height &= ~1;
1495 }
1496 /* Flash Media Server uses tag H263 with Sorenson Spark */
1497 if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
1498 !memcmp(st->codec->codec_name, "Sorenson H263", 13))
1499 st->codec->codec_id = AV_CODEC_ID_FLV1;
1500
1501 st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1502 color_table_id = avio_rb16(pb); /* colortable id */
1503 av_dlog(c->fc, "depth %d, ctab id %d\n",
1504 st->codec->bits_per_coded_sample, color_table_id);
1505 /* figure out the palette situation */
1506 color_depth = st->codec->bits_per_coded_sample & 0x1F;
1507 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1508
1509 /* if the depth is 2, 4, or 8 bpp, file is palettized */
1510 if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
1511 /* for palette traversal */
1512 unsigned int color_start, color_count, color_end;
1513 unsigned char a, r, g, b;
1514
1515 if (color_greyscale) {
1516 int color_index, color_dec;
1517 /* compute the greyscale palette */
1518 st->codec->bits_per_coded_sample = color_depth;
1519 color_count = 1 << color_depth;
1520 color_index = 255;
1521 color_dec = 256 / (color_count - 1);
1522 for (j = 0; j < color_count; j++) {
1523 if (st->codec->codec_id == AV_CODEC_ID_CINEPAK){
1524 r = g = b = color_count - 1 - color_index;
1525 } else
1526 r = g = b = color_index;
1527 sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1528 color_index -= color_dec;
1529 if (color_index < 0)
1530 color_index = 0;
1531 }
1532 } else if (color_table_id) {
1533 const uint8_t *color_table;
1534 /* if flag bit 3 is set, use the default palette */
1535 color_count = 1 << color_depth;
1536 if (color_depth == 2)
1537 color_table = ff_qt_default_palette_4;
1538 else if (color_depth == 4)
1539 color_table = ff_qt_default_palette_16;
1540 else
1541 color_table = ff_qt_default_palette_256;
1542
1543 for (j = 0; j < color_count; j++) {
1544 r = color_table[j * 3 + 0];
1545 g = color_table[j * 3 + 1];
1546 b = color_table[j * 3 + 2];
1547 sc->palette[j] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
1548 }
1549 } else {
1550 /* load the palette from the file */
1551 color_start = avio_rb32(pb);
1552 color_count = avio_rb16(pb);
1553 color_end = avio_rb16(pb);
1554 if ((color_start <= 255) && (color_end <= 255)) {
1555 for (j = color_start; j <= color_end; j++) {
1556 /* each A, R, G, or B component is 16 bits;
1557 * only use the top 8 bits */
1558 a = avio_r8(pb);
1559 avio_r8(pb);
1560 r = avio_r8(pb);
1561 avio_r8(pb);
1562 g = avio_r8(pb);
1563 avio_r8(pb);
1564 b = avio_r8(pb);
1565 avio_r8(pb);
1566 sc->palette[j] = (a << 24 ) | (r << 16) | (g << 8) | (b);
1567 }
1568 }
1569 }
1570 sc->has_palette = 1;
1571 }
1572}
1573
1574static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1575 AVStream *st, MOVStreamContext *sc)
1576{
1577 int bits_per_sample, flags;
1578 uint16_t version = avio_rb16(pb);
1579 AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1580
1581 avio_rb16(pb); /* revision level */
1582 avio_rb32(pb); /* vendor */
1583
1584 st->codec->channels = avio_rb16(pb); /* channel count */
1585 st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1586 av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1587
1588 sc->audio_cid = avio_rb16(pb);
1589 avio_rb16(pb); /* packet size = 0 */
1590
1591 st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1592
1593 // Read QT version 1 fields. In version 0 these do not exist.
1594 av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
1595 if (!c->isom ||
1596 (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1597
1598 if (version == 1) {
1599 sc->samples_per_frame = avio_rb32(pb);
1600 avio_rb32(pb); /* bytes per packet */
1601 sc->bytes_per_frame = avio_rb32(pb);
1602 avio_rb32(pb); /* bytes per sample */
1603 } else if (version == 2) {
1604 avio_rb32(pb); /* sizeof struct only */
1605 st->codec->sample_rate = av_int2double(avio_rb64(pb));
1606 st->codec->channels = avio_rb32(pb);
1607 avio_rb32(pb); /* always 0x7F000000 */
1608 st->codec->bits_per_coded_sample = avio_rb32(pb);
1609
1610 flags = avio_rb32(pb); /* lpcm format specific flag */
1611 sc->bytes_per_frame = avio_rb32(pb);
1612 sc->samples_per_frame = avio_rb32(pb);
1613 if (st->codec->codec_tag == MKTAG('l','p','c','m'))
1614 st->codec->codec_id =
1615 ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
1616 flags);
1617 }
1618 }
1619
1620 switch (st->codec->codec_id) {
1621 case AV_CODEC_ID_PCM_S8:
1622 case AV_CODEC_ID_PCM_U8:
1623 if (st->codec->bits_per_coded_sample == 16)
1624 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
1625 break;
1626 case AV_CODEC_ID_PCM_S16LE:
1627 case AV_CODEC_ID_PCM_S16BE:
1628 if (st->codec->bits_per_coded_sample == 8)
1629 st->codec->codec_id = AV_CODEC_ID_PCM_S8;
1630 else if (st->codec->bits_per_coded_sample == 24)
1631 st->codec->codec_id =
1632 st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
1633 AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1634 break;
1635 /* set values for old format before stsd version 1 appeared */
1636 case AV_CODEC_ID_MACE3:
1637 sc->samples_per_frame = 6;
1638 sc->bytes_per_frame = 2 * st->codec->channels;
1639 break;
1640 case AV_CODEC_ID_MACE6:
1641 sc->samples_per_frame = 6;
1642 sc->bytes_per_frame = 1 * st->codec->channels;
1643 break;
1644 case AV_CODEC_ID_ADPCM_IMA_QT:
1645 sc->samples_per_frame = 64;
1646 sc->bytes_per_frame = 34 * st->codec->channels;
1647 break;
1648 case AV_CODEC_ID_GSM:
1649 sc->samples_per_frame = 160;
1650 sc->bytes_per_frame = 33;
1651 break;
1652 default:
1653 break;
1654 }
1655
1656 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1657 if (bits_per_sample) {
1658 st->codec->bits_per_coded_sample = bits_per_sample;
1659 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1660 }
1661}
1662
1663static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
1664 AVStream *st, MOVStreamContext *sc,
1665 int size)
1666{
1667 // ttxt stsd contains display flags, justification, background
1668 // color, fonts, and default styles, so fake an atom to read it
1669 MOVAtom fake_atom = { .size = size };
1670 // mp4s contains a regular esds atom
1671 if (st->codec->codec_tag != AV_RL32("mp4s"))
1672 mov_read_glbl(c, pb, fake_atom);
1673 st->codec->width = sc->width;
1674 st->codec->height = sc->height;
1675}
1676
1677static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
1678 AVStream *st, MOVStreamContext *sc,
1679 int size)
1680{
1681 if (st->codec->codec_tag == MKTAG('t','m','c','d')) {
1682 if (ff_alloc_extradata(st->codec, size))
1683 return AVERROR(ENOMEM);
1684 avio_read(pb, st->codec->extradata, size);
1685 if (size > 16) {
1686 MOVStreamContext *tmcd_ctx = st->priv_data;
1687 int val;
1688 val = AV_RB32(st->codec->extradata + 4);
1689 tmcd_ctx->tmcd_flags = val;
1690 if (val & 1)
1691 st->codec->flags2 |= CODEC_FLAG2_DROP_FRAME_TIMECODE;
1692 st->codec->time_base.den = st->codec->extradata[16]; /* number of frame */
1693 st->codec->time_base.num = 1;
1694 }
1695 } else {
1696 /* other codec type, just skip (rtp, mp4s ...) */
1697 avio_skip(pb, size);
1698 }
1699 return 0;
1700}
1701
1702static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
1703 AVStream *st, MOVStreamContext *sc)
1704{
1705 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1706 !st->codec->sample_rate && sc->time_scale > 1)
1707 st->codec->sample_rate = sc->time_scale;
1708
1709 /* special codec parameters handling */
1710 switch (st->codec->codec_id) {
1711#if CONFIG_DV_DEMUXER
1712 case AV_CODEC_ID_DVAUDIO:
1713 c->dv_fctx = avformat_alloc_context();
1714 c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
1715 if (!c->dv_demux) {
1716 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1717 return AVERROR(ENOMEM);
1718 }
1719 sc->dv_audio_container = 1;
1720 st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
1721 break;
1722#endif
1723 /* no ifdef since parameters are always those */
1724 case AV_CODEC_ID_QCELP:
1725 st->codec->channels = 1;
1726 // force sample rate for qcelp when not stored in mov
1727 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1728 st->codec->sample_rate = 8000;
1729 break;
1730 case AV_CODEC_ID_AMR_NB:
1731 st->codec->channels = 1;
1732 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1733 st->codec->sample_rate = 8000;
1734 break;
1735 case AV_CODEC_ID_AMR_WB:
1736 st->codec->channels = 1;
1737 st->codec->sample_rate = 16000;
1738 break;
1739 case AV_CODEC_ID_MP2:
1740 case AV_CODEC_ID_MP3:
1741 /* force type after stsd for m1a hdlr */
1742 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1743 st->need_parsing = AVSTREAM_PARSE_FULL;
1744 break;
1745 case AV_CODEC_ID_GSM:
1746 case AV_CODEC_ID_ADPCM_MS:
1747 case AV_CODEC_ID_ADPCM_IMA_WAV:
1748 case AV_CODEC_ID_ILBC:
1749 case AV_CODEC_ID_MACE3:
1750 case AV_CODEC_ID_MACE6:
1751 case AV_CODEC_ID_QDM2:
1752 st->codec->block_align = sc->bytes_per_frame;
1753 break;
1754 case AV_CODEC_ID_ALAC:
1755 if (st->codec->extradata_size == 36) {
1756 st->codec->channels = AV_RB8 (st->codec->extradata + 21);
1757 st->codec->sample_rate = AV_RB32(st->codec->extradata + 32);
1758 }
1759 break;
1760 case AV_CODEC_ID_AC3:
1761 st->need_parsing = AVSTREAM_PARSE_FULL;
1762 break;
1763 case AV_CODEC_ID_MPEG1VIDEO:
1764 st->need_parsing = AVSTREAM_PARSE_FULL;
1765 break;
1766 case AV_CODEC_ID_VC1:
1767 st->need_parsing = AVSTREAM_PARSE_FULL;
1768 break;
1769 case AV_CODEC_ID_HEVC:
1770 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1771 break;
1772 default:
1773 break;
1774 }
1775 return 0;
1776}
1777
1778static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
1779 int codec_tag, int format,
1780 int size)
1781{
1782 int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1783
1784 if (codec_tag &&
1785 (codec_tag != format &&
1786 (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
1787 : codec_tag != MKTAG('j','p','e','g')))) {
1788 /* Multiple fourcc, we skip JPEG. This is not correct, we should
1789 * export it as a separate AVStream but this needs a few changes
1790 * in the MOV demuxer, patch welcome. */
1791
1792 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
1793 avio_skip(pb, size);
1794 return 1;
1795 }
1796 if ( codec_tag == AV_RL32("avc1") ||
1797 codec_tag == AV_RL32("hvc1") ||
1798 codec_tag == AV_RL32("hev1")
1799 )
1800 av_log(c->fc, AV_LOG_WARNING, "Concatenated H.264 or H.265 might not play correctly.\n");
1801
1802 return 0;
1803}
1804
1805int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
1806{
1807 AVStream *st;
1808 MOVStreamContext *sc;
1809 int pseudo_stream_id;
1810
1811 if (c->fc->nb_streams < 1)
1812 return 0;
1813 st = c->fc->streams[c->fc->nb_streams-1];
1814 sc = st->priv_data;
1815
1816 for (pseudo_stream_id = 0;
1817 pseudo_stream_id < entries && !pb->eof_reached;
1818 pseudo_stream_id++) {
1819 //Parsing Sample description table
1820 enum AVCodecID id;
1821 int ret, dref_id = 1;
1822 MOVAtom a = { AV_RL32("stsd") };
1823 int64_t start_pos = avio_tell(pb);
1824 int64_t size = avio_rb32(pb); /* size */
1825 uint32_t format = avio_rl32(pb); /* data format */
1826
1827 if (size >= 16) {
1828 avio_rb32(pb); /* reserved */
1829 avio_rb16(pb); /* reserved */
1830 dref_id = avio_rb16(pb);
1831 }else if (size <= 7){
1832 av_log(c->fc, AV_LOG_ERROR, "invalid size %"PRId64" in stsd\n", size);
1833 return AVERROR_INVALIDDATA;
1834 }
1835
1836 if (mov_skip_multiple_stsd(c, pb, st->codec->codec_tag, format,
1837 size - (avio_tell(pb) - start_pos)))
1838 continue;
1839
1840 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
1841 sc->dref_id= dref_id;
1842
1843 id = mov_codec_id(st, format);
1844
1845 av_dlog(c->fc, "size=%"PRId64" 4CC= %c%c%c%c codec_type=%d\n", size,
1846 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1847 (format >> 24) & 0xff, st->codec->codec_type);
1848
1849 if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1850 st->codec->codec_id = id;
1851 mov_parse_stsd_video(c, pb, st, sc);
1852 } else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1853 st->codec->codec_id = id;
1854 mov_parse_stsd_audio(c, pb, st, sc);
1855 } else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1856 st->codec->codec_id = id;
1857 mov_parse_stsd_subtitle(c, pb, st, sc,
1858 size - (avio_tell(pb) - start_pos));
1859 } else {
1860 ret = mov_parse_stsd_data(c, pb, st, sc,
1861 size - (avio_tell(pb) - start_pos));
1862 if (ret < 0)
1863 return ret;
1864 }
1865 /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
1866 a.size = size - (avio_tell(pb) - start_pos);
1867 if (a.size > 8) {
1868 if ((ret = mov_read_default(c, pb, a)) < 0)
1869 return ret;
1870 } else if (a.size > 0)
1871 avio_skip(pb, a.size);
1872 }
1873
1874 if (pb->eof_reached)
1875 return AVERROR_EOF;
1876
1877 return mov_finalize_stsd_codec(c, pb, st, sc);
1878}
1879
1880static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1881{
1882 int entries;
1883
1884 avio_r8(pb); /* version */
1885 avio_rb24(pb); /* flags */
1886 entries = avio_rb32(pb);
1887
1888 return ff_mov_read_stsd_entries(c, pb, entries);
1889}
1890
1891static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1892{
1893 AVStream *st;
1894 MOVStreamContext *sc;
1895 unsigned int i, entries;
1896
1897 if (c->fc->nb_streams < 1)
1898 return 0;
1899 st = c->fc->streams[c->fc->nb_streams-1];
1900 sc = st->priv_data;
1901
1902 avio_r8(pb); /* version */
1903 avio_rb24(pb); /* flags */
1904
1905 entries = avio_rb32(pb);
1906
1907 av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1908
1909 if (!entries)
1910 return 0;
1911 if (entries >= UINT_MAX / sizeof(*sc->stsc_data))
1912 return AVERROR_INVALIDDATA;
1913 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1914 if (!sc->stsc_data)
1915 return AVERROR(ENOMEM);
1916
1917 for (i = 0; i < entries && !pb->eof_reached; i++) {
1918 sc->stsc_data[i].first = avio_rb32(pb);
1919 sc->stsc_data[i].count = avio_rb32(pb);
1920 sc->stsc_data[i].id = avio_rb32(pb);
1921 }
1922
1923 sc->stsc_count = i;
1924
1925 if (pb->eof_reached)
1926 return AVERROR_EOF;
1927
1928 return 0;
1929}
1930
1931static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1932{
1933 AVStream *st;
1934 MOVStreamContext *sc;
1935 unsigned i, entries;
1936
1937 if (c->fc->nb_streams < 1)
1938 return 0;
1939 st = c->fc->streams[c->fc->nb_streams-1];
1940 sc = st->priv_data;
1941
1942 avio_rb32(pb); // version + flags
1943
1944 entries = avio_rb32(pb);
1945 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1946 return AVERROR_INVALIDDATA;
1947 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1948 if (!sc->stps_data)
1949 return AVERROR(ENOMEM);
1950
1951 for (i = 0; i < entries && !pb->eof_reached; i++) {
1952 sc->stps_data[i] = avio_rb32(pb);
1953 //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1954 }
1955
1956 sc->stps_count = i;
1957
1958 if (pb->eof_reached)
1959 return AVERROR_EOF;
1960
1961 return 0;
1962}
1963
1964static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1965{
1966 AVStream *st;
1967 MOVStreamContext *sc;
1968 unsigned int i, entries;
1969
1970 if (c->fc->nb_streams < 1)
1971 return 0;
1972 st = c->fc->streams[c->fc->nb_streams-1];
1973 sc = st->priv_data;
1974
1975 avio_r8(pb); /* version */
1976 avio_rb24(pb); /* flags */
1977
1978 entries = avio_rb32(pb);
1979
1980 av_dlog(c->fc, "keyframe_count = %d\n", entries);
1981
1982 if (!entries)
1983 {
1984 sc->keyframe_absent = 1;
1985 if (!st->need_parsing)
1986 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1987 return 0;
1988 }
1989 if (entries >= UINT_MAX / sizeof(int))
1990 return AVERROR_INVALIDDATA;
1991 sc->keyframes = av_malloc(entries * sizeof(int));
1992 if (!sc->keyframes)
1993 return AVERROR(ENOMEM);
1994
1995 for (i = 0; i < entries && !pb->eof_reached; i++) {
1996 sc->keyframes[i] = avio_rb32(pb);
1997 //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1998 }
1999
2000 sc->keyframe_count = i;
2001
2002 if (pb->eof_reached)
2003 return AVERROR_EOF;
2004
2005 return 0;
2006}
2007
2008static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2009{
2010 AVStream *st;
2011 MOVStreamContext *sc;
2012 unsigned int i, entries, sample_size, field_size, num_bytes;
2013 GetBitContext gb;
2014 unsigned char* buf;
2015
2016 if (c->fc->nb_streams < 1)
2017 return 0;
2018 st = c->fc->streams[c->fc->nb_streams-1];
2019 sc = st->priv_data;
2020
2021 avio_r8(pb); /* version */
2022 avio_rb24(pb); /* flags */
2023
2024 if (atom.type == MKTAG('s','t','s','z')) {
2025 sample_size = avio_rb32(pb);
2026 if (!sc->sample_size) /* do not overwrite value computed in stsd */
2027 sc->sample_size = sample_size;
2028 sc->stsz_sample_size = sample_size;
2029 field_size = 32;
2030 } else {
2031 sample_size = 0;
2032 avio_rb24(pb); /* reserved */
2033 field_size = avio_r8(pb);
2034 }
2035 entries = avio_rb32(pb);
2036
2037 av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
2038
2039 sc->sample_count = entries;
2040 if (sample_size)
2041 return 0;
2042
2043 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2044 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
2045 return AVERROR_INVALIDDATA;
2046 }
2047
2048 if (!entries)
2049 return 0;
2050 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
2051 return AVERROR_INVALIDDATA;
2052 sc->sample_sizes = av_malloc(entries * sizeof(int));
2053 if (!sc->sample_sizes)
2054 return AVERROR(ENOMEM);
2055
2056 num_bytes = (entries*field_size+4)>>3;
2057
2058 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
2059 if (!buf) {
2060 av_freep(&sc->sample_sizes);
2061 return AVERROR(ENOMEM);
2062 }
2063
2064 if (avio_read(pb, buf, num_bytes) < num_bytes) {
2065 av_freep(&sc->sample_sizes);
2066 av_free(buf);
2067 return AVERROR_INVALIDDATA;
2068 }
2069
2070 init_get_bits(&gb, buf, 8*num_bytes);
2071
2072 for (i = 0; i < entries && !pb->eof_reached; i++) {
2073 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2074 sc->data_size += sc->sample_sizes[i];
2075 }
2076
2077 sc->sample_count = i;
2078
2079 if (pb->eof_reached)
2080 return AVERROR_EOF;
2081
2082 av_free(buf);
2083 return 0;
2084}
2085
2086static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2087{
2088 AVStream *st;
2089 MOVStreamContext *sc;
2090 unsigned int i, entries;
2091 int64_t duration=0;
2092 int64_t total_sample_count=0;
2093
2094 if (c->fc->nb_streams < 1)
2095 return 0;
2096 st = c->fc->streams[c->fc->nb_streams-1];
2097 sc = st->priv_data;
2098
2099 avio_r8(pb); /* version */
2100 avio_rb24(pb); /* flags */
2101 entries = avio_rb32(pb);
2102
2103 av_dlog(c->fc, "track[%i].stts.entries = %i\n",
2104 c->fc->nb_streams-1, entries);
2105
2106 if (entries >= UINT_MAX / sizeof(*sc->stts_data))
2107 return -1;
2108
2109 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
2110 if (!sc->stts_data)
2111 return AVERROR(ENOMEM);
2112
2113 for (i = 0; i < entries && !pb->eof_reached; i++) {
2114 int sample_duration;
2115 int sample_count;
2116
2117 sample_count=avio_rb32(pb);
2118 sample_duration = avio_rb32(pb);
2119
2120 /* sample_duration < 0 is invalid based on the spec */
2121 if (sample_duration < 0) {
2122 av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta in STTS %d\n", sample_duration);
2123 sample_duration = 1;
2124 }
2125 if (sample_count < 0) {
2126 av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2127 return AVERROR_INVALIDDATA;
2128 }
2129 sc->stts_data[i].count= sample_count;
2130 sc->stts_data[i].duration= sample_duration;
2131
2132 av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",
2133 sample_count, sample_duration);
2134
2135 duration+=(int64_t)sample_duration*sample_count;
2136 total_sample_count+=sample_count;
2137 }
2138
2139 sc->stts_count = i;
2140
2141 if (pb->eof_reached)
2142 return AVERROR_EOF;
2143
2144 st->nb_frames= total_sample_count;
2145 if (duration)
2146 st->duration= duration;
2147 sc->track_end = duration;
2148 return 0;
2149}
2150
2151static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2152{
2153 if (duration < 0) {
2154 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2155 }
2156}
2157
2158static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2159{
2160 AVStream *st;
2161 MOVStreamContext *sc;
2162 unsigned int i, entries;
2163
2164 if (c->fc->nb_streams < 1)
2165 return 0;
2166 st = c->fc->streams[c->fc->nb_streams-1];
2167 sc = st->priv_data;
2168
2169 avio_r8(pb); /* version */
2170 avio_rb24(pb); /* flags */
2171 entries = avio_rb32(pb);
2172
2173 av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
2174
2175 if (!entries)
2176 return 0;
2177 if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2178 return AVERROR_INVALIDDATA;
2179 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
2180 if (!sc->ctts_data)
2181 return AVERROR(ENOMEM);
2182
2183 for (i = 0; i < entries && !pb->eof_reached; i++) {
2184 int count =avio_rb32(pb);
2185 int duration =avio_rb32(pb);
2186
2187 sc->ctts_data[i].count = count;
2188 sc->ctts_data[i].duration= duration;
2189
2190 av_dlog(c->fc, "count=%d, duration=%d\n",
2191 count, duration);
2192
2193 if (FFABS(duration) > (1<<28) && i+2<entries) {
2194 av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2195 av_freep(&sc->ctts_data);
2196 sc->ctts_count = 0;
2197 return 0;
2198 }
2199
2200 if (i+2<entries)
2201 mov_update_dts_shift(sc, duration);
2202 }
2203
2204 sc->ctts_count = i;
2205
2206 if (pb->eof_reached)
2207 return AVERROR_EOF;
2208
2209 av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
2210
2211 return 0;
2212}
2213
2214static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2215{
2216 AVStream *st;
2217 MOVStreamContext *sc;
2218 unsigned int i, entries;
2219 uint8_t version;
2220 uint32_t grouping_type;
2221
2222 if (c->fc->nb_streams < 1)
2223 return 0;
2224 st = c->fc->streams[c->fc->nb_streams-1];
2225 sc = st->priv_data;
2226
2227 version = avio_r8(pb); /* version */
2228 avio_rb24(pb); /* flags */
2229 grouping_type = avio_rl32(pb);
2230 if (grouping_type != MKTAG( 'r','a','p',' '))
2231 return 0; /* only support 'rap ' grouping */
2232 if (version == 1)
2233 avio_rb32(pb); /* grouping_type_parameter */
2234
2235 entries = avio_rb32(pb);
2236 if (!entries)
2237 return 0;
2238 if (entries >= UINT_MAX / sizeof(*sc->rap_group))
2239 return AVERROR_INVALIDDATA;
2240 sc->rap_group = av_malloc(entries * sizeof(*sc->rap_group));
2241 if (!sc->rap_group)
2242 return AVERROR(ENOMEM);
2243
2244 for (i = 0; i < entries && !pb->eof_reached; i++) {
2245 sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2246 sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2247 }
2248
2249 sc->rap_group_count = i;
2250
2251 return pb->eof_reached ? AVERROR_EOF : 0;
2252}
2253
2254static void mov_build_index(MOVContext *mov, AVStream *st)
2255{
2256 MOVStreamContext *sc = st->priv_data;
2257 int64_t current_offset;
2258 int64_t current_dts = 0;
2259 unsigned int stts_index = 0;
2260 unsigned int stsc_index = 0;
2261 unsigned int stss_index = 0;
2262 unsigned int stps_index = 0;
2263 unsigned int i, j;
2264 uint64_t stream_size = 0;
2265
2266 /* adjust first dts according to edit list */
2267 if ((sc->empty_duration || sc->start_time) && mov->time_scale > 0) {
2268 if (sc->empty_duration)
2269 sc->empty_duration = av_rescale(sc->empty_duration, sc->time_scale, mov->time_scale);
2270 sc->time_offset = sc->start_time - sc->empty_duration;
2271 current_dts = -sc->time_offset;
2272 if (sc->ctts_count>0 && sc->stts_count>0 &&
2273 sc->ctts_data[0].duration / FFMAX(sc->stts_data[0].duration, 1) > 16) {
2274 /* more than 16 frames delay, dts are likely wrong
2275 this happens with files created by iMovie */
2276 sc->wrong_dts = 1;
2277 st->codec->has_b_frames = 1;
2278 }
2279 }
2280
2281 /* only use old uncompressed audio chunk demuxing when stts specifies it */
2282 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
2283 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
2284 unsigned int current_sample = 0;
2285 unsigned int stts_sample = 0;
2286 unsigned int sample_size;
2287 unsigned int distance = 0;
2288 unsigned int rap_group_index = 0;
2289 unsigned int rap_group_sample = 0;
2290 int rap_group_present = sc->rap_group_count && sc->rap_group;
2291 int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
2292
2293 current_dts -= sc->dts_shift;
2294
2295 if (!sc->sample_count || st->nb_index_entries)
2296 return;
2297 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2298 return;
2299 if (av_reallocp_array(&st->index_entries,
2300 st->nb_index_entries + sc->sample_count,
2301 sizeof(*st->index_entries)) < 0) {
2302 st->nb_index_entries = 0;
2303 return;
2304 }
2305 st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
2306
2307 for (i = 0; i < sc->chunk_count; i++) {
2308 int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
2309 current_offset = sc->chunk_offsets[i];
2310 while (stsc_index + 1 < sc->stsc_count &&
2311 i + 1 == sc->stsc_data[stsc_index + 1].first)
2312 stsc_index++;
2313
2314 if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
2315 sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
2316 av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
2317 sc->stsz_sample_size = sc->sample_size;
2318 }
2319 if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
2320 av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
2321 sc->stsz_sample_size = sc->sample_size;
2322 }
2323
2324 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
2325 int keyframe = 0;
2326 if (current_sample >= sc->sample_count) {
2327 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
2328 return;
2329 }
2330
2331 if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
2332 keyframe = 1;
2333 if (stss_index + 1 < sc->keyframe_count)
2334 stss_index++;
2335 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
2336 keyframe = 1;
2337 if (stps_index + 1 < sc->stps_count)
2338 stps_index++;
2339 }
2340 if (rap_group_present && rap_group_index < sc->rap_group_count) {
2341 if (sc->rap_group[rap_group_index].index > 0)
2342 keyframe = 1;
2343 if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
2344 rap_group_sample = 0;
2345 rap_group_index++;
2346 }
2347 }
2348 if (keyframe)
2349 distance = 0;
2350 sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
2351 if (sc->pseudo_stream_id == -1 ||
2352 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
2353 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
2354 e->pos = current_offset;
2355 e->timestamp = current_dts;
2356 e->size = sample_size;
2357 e->min_distance = distance;
2358 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
2359 av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2360 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
2361 current_offset, current_dts, sample_size, distance, keyframe);
2362 }
2363
2364 current_offset += sample_size;
2365 stream_size += sample_size;
2366 current_dts += sc->stts_data[stts_index].duration;
2367 distance++;
2368 stts_sample++;
2369 current_sample++;
2370 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
2371 stts_sample = 0;
2372 stts_index++;
2373 }
2374 }
2375 }
2376 if (st->duration > 0)
2377 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
2378 } else {
2379 unsigned chunk_samples, total = 0;
2380
2381 // compute total chunk count
2382 for (i = 0; i < sc->stsc_count; i++) {
2383 unsigned count, chunk_count;
2384
2385 chunk_samples = sc->stsc_data[i].count;
2386 if (i != sc->stsc_count - 1 &&
2387 sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
2388 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
2389 return;
2390 }
2391
2392 if (sc->samples_per_frame >= 160) { // gsm
2393 count = chunk_samples / sc->samples_per_frame;
2394 } else if (sc->samples_per_frame > 1) {
2395 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
2396 count = (chunk_samples+samples-1) / samples;
2397 } else {
2398 count = (chunk_samples+1023) / 1024;
2399 }
2400
2401 if (i < sc->stsc_count - 1)
2402 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
2403 else
2404 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
2405 total += chunk_count * count;
2406 }
2407
2408 av_dlog(mov->fc, "chunk count %d\n", total);
2409 if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
2410 return;
2411 if (av_reallocp_array(&st->index_entries,
2412 st->nb_index_entries + total,
2413 sizeof(*st->index_entries)) < 0) {
2414 st->nb_index_entries = 0;
2415 return;
2416 }
2417 st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
2418
2419 // populate index
2420 for (i = 0; i < sc->chunk_count; i++) {
2421 current_offset = sc->chunk_offsets[i];
2422 if (stsc_index + 1 < sc->stsc_count &&
2423 i + 1 == sc->stsc_data[stsc_index + 1].first)
2424 stsc_index++;
2425 chunk_samples = sc->stsc_data[stsc_index].count;
2426
2427 while (chunk_samples > 0) {
2428 AVIndexEntry *e;
2429 unsigned size, samples;
2430
2431 if (sc->samples_per_frame >= 160) { // gsm
2432 samples = sc->samples_per_frame;
2433 size = sc->bytes_per_frame;
2434 } else {
2435 if (sc->samples_per_frame > 1) {
2436 samples = FFMIN((1024 / sc->samples_per_frame)*
2437 sc->samples_per_frame, chunk_samples);
2438 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
2439 } else {
2440 samples = FFMIN(1024, chunk_samples);
2441 size = samples * sc->sample_size;
2442 }
2443 }
2444
2445 if (st->nb_index_entries >= total) {
2446 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
2447 return;
2448 }
2449 e = &st->index_entries[st->nb_index_entries++];
2450 e->pos = current_offset;
2451 e->timestamp = current_dts;
2452 e->size = size;
2453 e->min_distance = 0;
2454 e->flags = AVINDEX_KEYFRAME;
2455 av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
2456 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
2457 size, samples);
2458
2459 current_offset += size;
2460 current_dts += samples;
2461 chunk_samples -= samples;
2462 }
2463 }
2464 }
2465}
2466
2467static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
2468 AVIOInterruptCB *int_cb, int use_absolute_path, AVFormatContext *fc)
2469{
2470 /* try relative path, we do not try the absolute because it can leak information about our
2471 system to an attacker */
2472 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
2473 char filename[1024];
2474 const char *src_path;
2475 int i, l;
2476
2477 /* find a source dir */
2478 src_path = strrchr(src, '/');
2479 if (src_path)
2480 src_path++;
2481 else
2482 src_path = src;
2483
2484 /* find a next level down to target */
2485 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
2486 if (ref->path[l] == '/') {
2487 if (i == ref->nlvl_to - 1)
2488 break;
2489 else
2490 i++;
2491 }
2492
2493 /* compose filename if next level down to target was found */
2494 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
2495 memcpy(filename, src, src_path - src);
2496 filename[src_path - src] = 0;
2497
2498 for (i = 1; i < ref->nlvl_from; i++)
2499 av_strlcat(filename, "../", 1024);
2500
2501 av_strlcat(filename, ref->path + l + 1, 1024);
2502
2503 if (!avio_open2(pb, filename, AVIO_FLAG_READ, int_cb, NULL))
2504 return 0;
2505 }
2506 } else if (use_absolute_path) {
2507 av_log(fc, AV_LOG_WARNING, "Using absolute path on user request, "
2508 "this is a possible security issue\n");
2509 if (!avio_open2(pb, ref->path, AVIO_FLAG_READ, int_cb, NULL))
2510 return 0;
2511 }
2512
2513 return AVERROR(ENOENT);
2514}
2515
2516static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
2517{
2518 if (sc->time_scale <= 0) {
2519 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
2520 sc->time_scale = c->time_scale;
2521 if (sc->time_scale <= 0)
2522 sc->time_scale = 1;
2523 }
2524}
2525
2526static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2527{
2528 AVStream *st;
2529 MOVStreamContext *sc;
2530 int ret;
2531
2532 st = avformat_new_stream(c->fc, NULL);
2533 if (!st) return AVERROR(ENOMEM);
2534 st->id = c->fc->nb_streams;
2535 sc = av_mallocz(sizeof(MOVStreamContext));
2536 if (!sc) return AVERROR(ENOMEM);
2537
2538 st->priv_data = sc;
2539 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2540 sc->ffindex = st->index;
2541
2542 if ((ret = mov_read_default(c, pb, atom)) < 0)
2543 return ret;
2544
2545 /* sanity checks */
2546 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
2547 (!sc->sample_size && !sc->sample_count))) {
2548 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
2549 st->index);
2550 return 0;
2551 }
2552
2553 fix_timescale(c, sc);
2554
2555 avpriv_set_pts_info(st, 64, 1, sc->time_scale);
2556
2557 mov_build_index(c, st);
2558
2559 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
2560 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
2561 if (mov_open_dref(&sc->pb, c->fc->filename, dref, &c->fc->interrupt_callback,
2562 c->use_absolute_path, c->fc) < 0)
2563 av_log(c->fc, AV_LOG_ERROR,
2564 "stream %d, error opening alias: path='%s', dir='%s', "
2565 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
2566 st->index, dref->path, dref->dir, dref->filename,
2567 dref->volume, dref->nlvl_from, dref->nlvl_to);
2568 } else {
2569 sc->pb = c->fc->pb;
2570 sc->pb_is_copied = 1;
2571 }
2572
2573 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2574 if (!st->sample_aspect_ratio.num &&
2575 (st->codec->width != sc->width || st->codec->height != sc->height)) {
2576 st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
2577 ((double)st->codec->width * sc->height), INT_MAX);
2578 }
2579
2580 if (st->duration > 0)
2581 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2582 sc->time_scale*st->nb_frames, st->duration, INT_MAX);
2583
2584#if FF_API_R_FRAME_RATE
2585 if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
2586 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
2587 sc->time_scale, sc->stts_data[0].duration, INT_MAX);
2588#endif
2589 }
2590
2591 // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
2592 if (!st->codec->extradata_size && st->codec->codec_id == AV_CODEC_ID_H264 &&
2593 st->codec->codec_tag != MKTAG('a', 'v', 'c', '1')) {
2594 ff_generate_avci_extradata(st);
2595 }
2596
2597 switch (st->codec->codec_id) {
2598#if CONFIG_H261_DECODER
2599 case AV_CODEC_ID_H261:
2600#endif
2601#if CONFIG_H263_DECODER
2602 case AV_CODEC_ID_H263:
2603#endif
2604#if CONFIG_MPEG4_DECODER
2605 case AV_CODEC_ID_MPEG4:
2606#endif
2607 st->codec->width = 0; /* let decoder init width/height */
2608 st->codec->height= 0;
2609 break;
2610 }
2611
2612 /* Do not need those anymore. */
2613 av_freep(&sc->chunk_offsets);
2614 av_freep(&sc->stsc_data);
2615 av_freep(&sc->sample_sizes);
2616 av_freep(&sc->keyframes);
2617 av_freep(&sc->stts_data);
2618 av_freep(&sc->stps_data);
2619 av_freep(&sc->rap_group);
2620
2621 return 0;
2622}
2623
2624static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2625{
2626 int ret;
2627 c->itunes_metadata = 1;
2628 ret = mov_read_default(c, pb, atom);
2629 c->itunes_metadata = 0;
2630 return ret;
2631}
2632
2633static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2634{
2635 while (atom.size > 8) {
2636 uint32_t tag = avio_rl32(pb);
2637 atom.size -= 4;
2638 if (tag == MKTAG('h','d','l','r')) {
2639 avio_seek(pb, -8, SEEK_CUR);
2640 atom.size += 8;
2641 return mov_read_default(c, pb, atom);
2642 }
2643 }
2644 return 0;
2645}
2646
2647static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2648{
2649 int i;
2650 int width;
2651 int height;
2652 int64_t disp_transform[2];
2653 int display_matrix[3][2];
2654 AVStream *st;
2655 MOVStreamContext *sc;
2656 int version;
2657 int flags;
2658
2659 if (c->fc->nb_streams < 1)
2660 return 0;
2661 st = c->fc->streams[c->fc->nb_streams-1];
2662 sc = st->priv_data;
2663
2664 version = avio_r8(pb);
2665 flags = avio_rb24(pb);
2666 st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
2667
2668 if (version == 1) {
2669 avio_rb64(pb);
2670 avio_rb64(pb);
2671 } else {
2672 avio_rb32(pb); /* creation time */
2673 avio_rb32(pb); /* modification time */
2674 }
2675 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
2676 avio_rb32(pb); /* reserved */
2677
2678 /* highlevel (considering edits) duration in movie timebase */
2679 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
2680 avio_rb32(pb); /* reserved */
2681 avio_rb32(pb); /* reserved */
2682
2683 avio_rb16(pb); /* layer */
2684 avio_rb16(pb); /* alternate group */
2685 avio_rb16(pb); /* volume */
2686 avio_rb16(pb); /* reserved */
2687
2688 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
2689 // they're kept in fixed point format through all calculations
2690 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
2691 for (i = 0; i < 3; i++) {
2692 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
2693 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
2694 avio_rb32(pb); // 2.30 fixed point (not used)
2695 }
2696
2697 width = avio_rb32(pb); // 16.16 fixed point track width
2698 height = avio_rb32(pb); // 16.16 fixed point track height
2699 sc->width = width >> 16;
2700 sc->height = height >> 16;
2701
2702 //Assign clockwise rotate values based on transform matrix so that
2703 //we can compensate for iPhone orientation during capture.
2704
2705 if (display_matrix[0][0] == 65536 && display_matrix[1][1] == 65536) {
2706 av_dict_set(&st->metadata, "rotate", "0", 0);
2707 st->rotation_degree = 0;
2708 }
2709
2710 if (display_matrix[1][0] == -65536 && display_matrix[0][1] == 65536) {
2711 av_dict_set(&st->metadata, "rotate", "90", 0);
2712 st->rotation_degree = 1;
2713 }
2714
2715 if (display_matrix[0][0] == -65536 && display_matrix[1][1] == -65536) {
2716 av_dict_set(&st->metadata, "rotate", "180", 0);
2717 st->rotation_degree = 2;
2718 }
2719
2720 if (display_matrix[1][0] == 65536 && display_matrix[0][1] == -65536) {
2721 av_dict_set(&st->metadata, "rotate", "270", 0);
2722 st->rotation_degree = 3;
2723 }
2724
2725 // transform the display width/height according to the matrix
2726 // skip this if the display matrix is the default identity matrix
2727 // or if it is rotating the picture, ex iPhone 3GS
2728 // to keep the same scale, use [width height 1<<16]
2729 if (width && height &&
2730 ((display_matrix[0][0] != 65536 ||
2731 display_matrix[1][1] != 65536) &&
2732 !display_matrix[0][1] &&
2733 !display_matrix[1][0] &&
2734 !display_matrix[2][0] && !display_matrix[2][1])) {
2735 for (i = 0; i < 2; i++)
2736 disp_transform[i] =
2737 (int64_t) width * display_matrix[0][i] +
2738 (int64_t) height * display_matrix[1][i] +
2739 ((int64_t) display_matrix[2][i] << 16);
2740
2741 //sample aspect ratio is new width/height divided by old width/height
2742 st->sample_aspect_ratio = av_d2q(
2743 ((double) disp_transform[0] * height) /
2744 ((double) disp_transform[1] * width), INT_MAX);
2745 }
2746 return 0;
2747}
2748
2749static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2750{
2751 MOVFragment *frag = &c->fragment;
2752 MOVTrackExt *trex = NULL;
2753 int flags, track_id, i;
2754
2755 avio_r8(pb); /* version */
2756 flags = avio_rb24(pb);
2757
2758 track_id = avio_rb32(pb);
2759 if (!track_id)
2760 return AVERROR_INVALIDDATA;
2761 frag->track_id = track_id;
2762 for (i = 0; i < c->trex_count; i++)
2763 if (c->trex_data[i].track_id == frag->track_id) {
2764 trex = &c->trex_data[i];
2765 break;
2766 }
2767 if (!trex) {
2768 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
2769 return AVERROR_INVALIDDATA;
2770 }
2771
2772 frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
2773 avio_rb64(pb) : frag->moof_offset;
2774 frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
2775
2776 frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
2777 avio_rb32(pb) : trex->duration;
2778 frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
2779 avio_rb32(pb) : trex->size;
2780 frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
2781 avio_rb32(pb) : trex->flags;
2782 av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
2783 return 0;
2784}
2785
2786static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2787{
2788 c->chapter_track = avio_rb32(pb);
2789 return 0;
2790}
2791
2792static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2793{
2794 MOVTrackExt *trex;
2795 int err;
2796
2797 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
2798 return AVERROR_INVALIDDATA;
2799 if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
2800 sizeof(*c->trex_data))) < 0) {
2801 c->trex_count = 0;
2802 return err;
2803 }
2804
2805 c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
2806
2807 trex = &c->trex_data[c->trex_count++];
2808 avio_r8(pb); /* version */
2809 avio_rb24(pb); /* flags */
2810 trex->track_id = avio_rb32(pb);
2811 trex->stsd_id = avio_rb32(pb);
2812 trex->duration = avio_rb32(pb);
2813 trex->size = avio_rb32(pb);
2814 trex->flags = avio_rb32(pb);
2815 return 0;
2816}
2817
2818static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2819{
2820 MOVFragment *frag = &c->fragment;
2821 AVStream *st = NULL;
2822 MOVStreamContext *sc;
2823 MOVStts *ctts_data;
2824 uint64_t offset;
2825 int64_t dts;
2826 int data_offset = 0;
2827 unsigned entries, first_sample_flags = frag->flags;
2828 int flags, distance, i, found_keyframe = 0, err;
2829
2830 for (i = 0; i < c->fc->nb_streams; i++) {
2831 if (c->fc->streams[i]->id == frag->track_id) {
2832 st = c->fc->streams[i];
2833 break;
2834 }
2835 }
2836 if (!st) {
2837 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2838 return AVERROR_INVALIDDATA;
2839 }
2840 sc = st->priv_data;
2841 if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
2842 return 0;
2843 avio_r8(pb); /* version */
2844 flags = avio_rb24(pb);
2845 entries = avio_rb32(pb);
2846 av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2847
2848 /* Always assume the presence of composition time offsets.
2849 * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
2850 * 1) in the initial movie, there are no samples.
2851 * 2) in the first movie fragment, there is only one sample without composition time offset.
2852 * 3) in the subsequent movie fragments, there are samples with composition time offset. */
2853 if (!sc->ctts_count && sc->sample_count)
2854 {
2855 /* Complement ctts table if moov atom doesn't have ctts atom. */
2856 ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
2857 if (!ctts_data)
2858 return AVERROR(ENOMEM);
2859 sc->ctts_data = ctts_data;
2860 sc->ctts_data[sc->ctts_count].count = sc->sample_count;
2861 sc->ctts_data[sc->ctts_count].duration = 0;
2862 sc->ctts_count++;
2863 }
2864 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2865 return AVERROR_INVALIDDATA;
2866 if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
2867 sizeof(*sc->ctts_data))) < 0) {
2868 sc->ctts_count = 0;
2869 return err;
2870 }
2871 if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
2872 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
2873 dts = sc->track_end - sc->time_offset;
2874 offset = frag->base_data_offset + data_offset;
2875 distance = 0;
2876 av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2877 for (i = 0; i < entries && !pb->eof_reached; i++) {
2878 unsigned sample_size = frag->size;
2879 int sample_flags = i ? frag->flags : first_sample_flags;
2880 unsigned sample_duration = frag->duration;
2881 int keyframe = 0;
2882
2883 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
2884 if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
2885 if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
2886 sc->ctts_data[sc->ctts_count].count = 1;
2887 sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
2888 avio_rb32(pb) : 0;
2889 mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
2890 sc->ctts_count++;
2891 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2892 keyframe = 1;
2893 else if (!found_keyframe)
2894 keyframe = found_keyframe =
2895 !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
2896 MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
2897 if (keyframe)
2898 distance = 0;
2899 av_add_index_entry(st, offset, dts, sample_size, distance,
2900 keyframe ? AVINDEX_KEYFRAME : 0);
2901 av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2902 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2903 offset, dts, sample_size, distance, keyframe);
2904 distance++;
2905 dts += sample_duration;
2906 offset += sample_size;
2907 sc->data_size += sample_size;
2908 }
2909
2910 if (pb->eof_reached)
2911 return AVERROR_EOF;
2912
2913 frag->moof_offset = offset;
2914 st->duration = sc->track_end = dts + sc->time_offset;
2915 return 0;
2916}
2917
2918/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2919/* like the files created with Adobe Premiere 5.0, for samples see */
2920/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2921static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2922{
2923 int err;
2924
2925 if (atom.size < 8)
2926 return 0; /* continue */
2927 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2928 avio_skip(pb, atom.size - 4);
2929 return 0;
2930 }
2931 atom.type = avio_rl32(pb);
2932 atom.size -= 8;
2933 if (atom.type != MKTAG('m','d','a','t')) {
2934 avio_skip(pb, atom.size);
2935 return 0;
2936 }
2937 err = mov_read_mdat(c, pb, atom);
2938 return err;
2939}
2940
2941static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2942{
2943#if CONFIG_ZLIB
2944 AVIOContext ctx;
2945 uint8_t *cmov_data;
2946 uint8_t *moov_data; /* uncompressed data */
2947 long cmov_len, moov_len;
2948 int ret = -1;
2949
2950 avio_rb32(pb); /* dcom atom */
2951 if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2952 return AVERROR_INVALIDDATA;
2953 if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2954 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
2955 return AVERROR_INVALIDDATA;
2956 }
2957 avio_rb32(pb); /* cmvd atom */
2958 if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2959 return AVERROR_INVALIDDATA;
2960 moov_len = avio_rb32(pb); /* uncompressed size */
2961 cmov_len = atom.size - 6 * 4;
2962
2963 cmov_data = av_malloc(cmov_len);
2964 if (!cmov_data)
2965 return AVERROR(ENOMEM);
2966 moov_data = av_malloc(moov_len);
2967 if (!moov_data) {
2968 av_free(cmov_data);
2969 return AVERROR(ENOMEM);
2970 }
2971 avio_read(pb, cmov_data, cmov_len);
2972 if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2973 goto free_and_return;
2974 if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2975 goto free_and_return;
2976 atom.type = MKTAG('m','o','o','v');
2977 atom.size = moov_len;
2978 ret = mov_read_default(c, &ctx, atom);
2979free_and_return:
2980 av_free(moov_data);
2981 av_free(cmov_data);
2982 return ret;
2983#else
2984 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2985 return AVERROR(ENOSYS);
2986#endif
2987}
2988
2989/* edit list atom */
2990static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2991{
2992 MOVStreamContext *sc;
2993 int i, edit_count, version, edit_start_index = 0;
2994 int unsupported = 0;
2995
2996 if (c->fc->nb_streams < 1 || c->ignore_editlist)
2997 return 0;
2998 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2999
3000 version = avio_r8(pb); /* version */
3001 avio_rb24(pb); /* flags */
3002 edit_count = avio_rb32(pb); /* entries */
3003
3004 if ((uint64_t)edit_count*12+8 > atom.size)
3005 return AVERROR_INVALIDDATA;
3006
3007 av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
3008 for (i=0; i<edit_count; i++){
3009 int64_t time;
3010 int64_t duration;
3011 int rate;
3012 if (version == 1) {
3013 duration = avio_rb64(pb);
3014 time = avio_rb64(pb);
3015 } else {
3016 duration = avio_rb32(pb); /* segment duration */
3017 time = (int32_t)avio_rb32(pb); /* media time */
3018 }
3019 rate = avio_rb32(pb);
3020 if (i == 0 && time == -1) {
3021 sc->empty_duration = duration;
3022 edit_start_index = 1;
3023 } else if (i == edit_start_index && time >= 0)
3024 sc->start_time = time;
3025 else
3026 unsupported = 1;
3027
3028 av_dlog(c->fc, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
3029 duration, time, rate / 65536.0);
3030 }
3031
3032 if (unsupported)
3033 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
3034 "a/v desync might occur, patch welcome\n");
3035
3036 return 0;
3037}
3038
3039static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3040{
3041 MOVStreamContext *sc;
3042
3043 if (c->fc->nb_streams < 1)
3044 return AVERROR_INVALIDDATA;
3045 sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
3046 sc->timecode_track = avio_rb32(pb);
3047 return 0;
3048}
3049
3050static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3051{
3052 int ret;
3053 uint8_t uuid[16];
3054 static const uint8_t uuid_isml_manifest[] = {
3055 0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
3056 0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
3057 };
3058
3059 if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
3060 return AVERROR_INVALIDDATA;
3061
3062 ret = avio_read(pb, uuid, sizeof(uuid));
3063 if (ret < 0) {
3064 return ret;
3065 } else if (ret != sizeof(uuid)) {
3066 return AVERROR_INVALIDDATA;
3067 }
3068 if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
3069 uint8_t *buffer, *ptr;
3070 char *endptr;
3071 size_t len = atom.size - sizeof(uuid);
3072
3073 if (len < 4) {
3074 return AVERROR_INVALIDDATA;
3075 }
3076 ret = avio_skip(pb, 4); // zeroes
3077 len -= 4;
3078
3079 buffer = av_mallocz(len + 1);
3080 if (!buffer) {
3081 return AVERROR(ENOMEM);
3082 }
3083 ret = avio_read(pb, buffer, len);
3084 if (ret < 0) {
3085 av_free(buffer);
3086 return ret;
3087 } else if (ret != len) {
3088 av_free(buffer);
3089 return AVERROR_INVALIDDATA;
3090 }
3091
3092 ptr = buffer;
3093 while ((ptr = av_stristr(ptr, "systemBitrate=\"")) != NULL) {
3094 ptr += sizeof("systemBitrate=\"") - 1;
3095 c->bitrates_count++;
3096 c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
3097 if (!c->bitrates) {
3098 c->bitrates_count = 0;
3099 av_free(buffer);
3100 return AVERROR(ENOMEM);
3101 }
3102 errno = 0;
3103 ret = strtol(ptr, &endptr, 10);
3104 if (ret < 0 || errno || *endptr != '"') {
3105 c->bitrates[c->bitrates_count - 1] = 0;
3106 } else {
3107 c->bitrates[c->bitrates_count - 1] = ret;
3108 }
3109 }
3110
3111 av_free(buffer);
3112 }
3113 return 0;
3114}
3115
3116static void mov_id32_date2year(AVDictionary **m)
3117{
3118 AVDictionaryEntry *t;
3119 if (t = av_dict_get(*m, "date", t, AV_DICT_MATCH_CASE)) {
3120 av_dict_set(m, "year", t->value, 0);
3121 av_log(NULL, AV_LOG_INFO, "[%s:%d]========date:%s\n", __FUNCTION__, __LINE__, t->value);
3122 }
3123}
3124
3125static int mov_read_id32(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3126{
3127 uint8_t version;
3128 uint32_t flags;
3129 uint8_t pad;
3130 uint16_t langcode;
3131 uint16_t shortbytes;
3132 char language[4] = {0};
3133 uint32_t str_size;
3134 AVFormatContext *s = c->fc;
3135 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
3136
3137 str_size = atom.size;
3138 version = avio_r8(pb); // version
3139 flags = avio_rb24(pb); //flags
3140 shortbytes = avio_rb16(pb);
3141 pad = (shortbytes & 0x8000) >> 15; //pad
3142 langcode = shortbytes & 0x7ffff; //language
3143 ff_mov_lang_to_iso639(langcode, language);
3144 str_size -= 6;
3145 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
3146 if (id3v2_extra_meta) {
3147 int err = ff_id3v2_parse_apic(s, &id3v2_extra_meta);
3148 if (err < 0) {
3149 av_log(NULL, AV_LOG_INFO, "[%s:%d]ff_id3v2_parse_apic err:%d\n", __FUNCTION__, __LINE__, err);
3150 return err;
3151 }
3152 }
3153 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
3154 mov_id32_date2year(&s->metadata);
3155
3156 return 0;
3157}
3158
3159static const MOVParseTableEntry mov_default_parse_table[] = {
3160{ MKTAG('A','C','L','R'), mov_read_avid },
3161{ MKTAG('A','P','R','G'), mov_read_avid },
3162{ MKTAG('A','A','L','P'), mov_read_avid },
3163{ MKTAG('A','R','E','S'), mov_read_ares },
3164{ MKTAG('a','v','s','s'), mov_read_avss },
3165{ MKTAG('c','h','p','l'), mov_read_chpl },
3166{ MKTAG('c','o','6','4'), mov_read_stco },
3167{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
3168{ MKTAG('d','i','n','f'), mov_read_default },
3169{ MKTAG('d','r','e','f'), mov_read_dref },
3170{ MKTAG('e','d','t','s'), mov_read_default },
3171{ MKTAG('e','l','s','t'), mov_read_elst },
3172{ MKTAG('e','n','d','a'), mov_read_enda },
3173{ MKTAG('f','i','e','l'), mov_read_fiel },
3174{ MKTAG('f','t','y','p'), mov_read_ftyp },
3175{ MKTAG('g','l','b','l'), mov_read_glbl },
3176{ MKTAG('h','d','l','r'), mov_read_hdlr },
3177{ MKTAG('i','l','s','t'), mov_read_ilst },
3178{ MKTAG('j','p','2','h'), mov_read_jp2h },
3179{ MKTAG('m','d','a','t'), mov_read_mdat },
3180{ MKTAG('m','d','h','d'), mov_read_mdhd },
3181{ MKTAG('m','d','i','a'), mov_read_default },
3182{ MKTAG('m','e','t','a'), mov_read_meta },
3183{ MKTAG('m','i','n','f'), mov_read_default },
3184{ MKTAG('m','o','o','f'), mov_read_moof },
3185{ MKTAG('m','o','o','v'), mov_read_moov },
3186{ MKTAG('m','v','e','x'), mov_read_default },
3187{ MKTAG('m','v','h','d'), mov_read_mvhd },
3188{ MKTAG('S','M','I',' '), mov_read_svq3 },
3189{ MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
3190{ MKTAG('a','v','c','C'), mov_read_glbl },
3191{ MKTAG('p','a','s','p'), mov_read_pasp },
3192{ MKTAG('s','t','b','l'), mov_read_default },
3193{ MKTAG('s','t','c','o'), mov_read_stco },
3194{ MKTAG('s','t','p','s'), mov_read_stps },
3195{ MKTAG('s','t','r','f'), mov_read_strf },
3196{ MKTAG('s','t','s','c'), mov_read_stsc },
3197{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
3198{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
3199{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
3200{ MKTAG('s','t','t','s'), mov_read_stts },
3201{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
3202{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
3203{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
3204{ MKTAG('t','r','a','k'), mov_read_trak },
3205{ MKTAG('t','r','a','f'), mov_read_default },
3206{ MKTAG('t','r','e','f'), mov_read_default },
3207{ MKTAG('t','m','c','d'), mov_read_tmcd },
3208{ MKTAG('c','h','a','p'), mov_read_chap },
3209{ MKTAG('t','r','e','x'), mov_read_trex },
3210{ MKTAG('t','r','u','n'), mov_read_trun },
3211{ MKTAG('u','d','t','a'), mov_read_default },
3212{ MKTAG('w','a','v','e'), mov_read_wave },
3213{ MKTAG('e','s','d','s'), mov_read_esds },
3214{ MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
3215{ MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
3216{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
3217{ MKTAG('w','f','e','x'), mov_read_wfex },
3218{ MKTAG('c','m','o','v'), mov_read_cmov },
3219{ MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
3220{ MKTAG('d','v','c','1'), mov_read_dvc1 },
3221{ MKTAG('s','b','g','p'), mov_read_sbgp },
3222{ MKTAG('h','v','c','C'), mov_read_glbl },
3223{ MKTAG('u','u','i','d'), mov_read_uuid },
3224{ MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
3225{ MKTAG('I','D','3','2'), mov_read_id32 },
3226
3227{ 0, NULL }
3228};
3229
3230static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3231{
3232 int64_t total_size = 0;
3233 MOVAtom a;
3234 int i;
3235
3236 if (atom.size < 0)
3237 atom.size = INT64_MAX;
3238 while (total_size + 8 <= atom.size && !url_feof(pb)) {
3239 int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
3240 a.size = atom.size;
3241 a.type=0;
3242 if (atom.size >= 8) {
3243 a.size = avio_rb32(pb);
3244 a.type = avio_rl32(pb);
3245 if (atom.type != MKTAG('r','o','o','t') &&
3246 atom.type != MKTAG('m','o','o','v'))
3247 {
3248 if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
3249 {
3250 av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
3251 avio_skip(pb, -8);
3252 return 0;
3253 }
3254 }
3255 total_size += 8;
3256 if (a.size == 1) { /* 64 bit extended size */
3257 a.size = avio_rb64(pb) - 8;
3258 total_size += 8;
3259 }
3260 }
3261 av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
3262 a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
3263 if (a.size == 0) {
3264 a.size = atom.size - total_size + 8;
3265 }
3266 a.size -= 8;
3267 if (a.size < 0)
3268 break;
3269 a.size = FFMIN(a.size, atom.size - total_size);
3270
3271 for (i = 0; mov_default_parse_table[i].type; i++)
3272 if (mov_default_parse_table[i].type == a.type) {
3273 parse = mov_default_parse_table[i].parse;
3274 break;
3275 }
3276
3277 // container is user data
3278 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
3279 atom.type == MKTAG('i','l','s','t')))
3280 parse = mov_read_udta_string;
3281
3282 if (!parse) { /* skip leaf atoms data */
3283 avio_skip(pb, a.size);
3284 } else {
3285 int64_t start_pos = avio_tell(pb);
3286 int64_t left;
3287 int err = parse(c, pb, a);
3288 if (err < 0)
3289 return err;
3290 if (c->found_moov && c->found_mdat &&
3291 ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
3292 start_pos + a.size == avio_size(pb))) {
3293 if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
3294 c->next_root_atom = start_pos + a.size;
3295 return 0;
3296 }
3297 left = a.size - avio_tell(pb) + start_pos;
3298 if (left > 0) /* skip garbage at atom end */
3299 avio_skip(pb, left);
3300 else if (left < 0) {
3301 av_log(c->fc, AV_LOG_WARNING,
3302 "overread end of atom '%.4s' by %"PRId64" bytes\n",
3303 (char*)&a.type, -left);
3304 avio_seek(pb, left, SEEK_CUR);
3305 }
3306 }
3307
3308 total_size += a.size;
3309 }
3310
3311 if (total_size < atom.size && atom.size < 0x7ffff)
3312 avio_skip(pb, atom.size - total_size);
3313
3314 return 0;
3315}
3316
3317static int mov_probe(AVProbeData *p)
3318{
3319 int64_t offset;
3320 uint32_t tag;
3321 int score = 0;
3322 int moov_offset = -1;
3323
3324 /* check file header */
3325 offset = 0;
3326 for (;;) {
3327 /* ignore invalid offset */
3328 if ((offset + 8) > p->buf_size)
3329 break;
3330 tag = AV_RL32(p->buf + offset + 4);
3331 switch(tag) {
3332 /* check for obvious tags */
3333 case MKTAG('m','o','o','v'):
3334 moov_offset = offset + 4;
3335 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
3336 case MKTAG('m','d','a','t'):
3337 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
3338 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
3339 case MKTAG('f','t','y','p'):
3340 if (AV_RB32(p->buf+offset) < 8 &&
3341 (AV_RB32(p->buf+offset) != 1 ||
3342 offset + 12 > (unsigned int)p->buf_size ||
3343 AV_RB64(p->buf+offset + 8) == 0)) {
3344 score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3345 } else {
3346 score = AVPROBE_SCORE_MAX;
3347 }
3348 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3349 break;
3350 /* those are more common words, so rate then a bit less */
3351 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
3352 case MKTAG('w','i','d','e'):
3353 case MKTAG('f','r','e','e'):
3354 case MKTAG('j','u','n','k'):
3355 case MKTAG('p','i','c','t'):
3356 score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
3357 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3358 break;
3359 case MKTAG(0x82,0x82,0x7f,0x7d):
3360 case MKTAG('s','k','i','p'):
3361 case MKTAG('u','u','i','d'):
3362 case MKTAG('p','r','f','l'):
3363 /* if we only find those cause probedata is too small at least rate them */
3364 score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
3365 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3366 break;
3367 default:
3368 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
3369 }
3370 }
3371 if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
3372 /* moov atom in the header - we should make sure that this is not a
3373 * MOV-packed MPEG-PS */
3374 offset = moov_offset;
3375
3376 while(offset < (p->buf_size - 16)){ /* Sufficient space */
3377 /* We found an actual hdlr atom */
3378 if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
3379 AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
3380 AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
3381 av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
3382 /* We found a media handler reference atom describing an
3383 * MPEG-PS-in-MOV, return a
3384 * low score to force expanding the probe window until
3385 * mpegps_probe finds what it needs */
3386 return 5;
3387 }else
3388 /* Keep looking */
3389 offset+=2;
3390 }
3391 }
3392
3393 return score;
3394}
3395
3396// must be done after parsing all trak because there's no order requirement
3397static void mov_read_chapters(AVFormatContext *s)
3398{
3399 MOVContext *mov = s->priv_data;
3400 AVStream *st = NULL;
3401 MOVStreamContext *sc;
3402 int64_t cur_pos;
3403 int i;
3404
3405 for (i = 0; i < s->nb_streams; i++)
3406 if (s->streams[i]->id == mov->chapter_track) {
3407 st = s->streams[i];
3408 break;
3409 }
3410 if (!st) {
3411 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
3412 return;
3413 }
3414
3415 st->discard = AVDISCARD_ALL;
3416 sc = st->priv_data;
3417 cur_pos = avio_tell(sc->pb);
3418
3419 for (i = 0; i < st->nb_index_entries; i++) {
3420 AVIndexEntry *sample = &st->index_entries[i];
3421 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
3422 uint8_t *title;
3423 uint16_t ch;
3424 int len, title_len;
3425
3426 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3427 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
3428 goto finish;
3429 }
3430
3431 // the first two bytes are the length of the title
3432 len = avio_rb16(sc->pb);
3433 if (len > sample->size-2)
3434 continue;
3435 title_len = 2*len + 1;
3436 if (!(title = av_mallocz(title_len)))
3437 goto finish;
3438
3439 // The samples could theoretically be in any encoding if there's an encd
3440 // atom following, but in practice are only utf-8 or utf-16, distinguished
3441 // instead by the presence of a BOM
3442 if (!len) {
3443 title[0] = 0;
3444 } else {
3445 ch = avio_rb16(sc->pb);
3446 if (ch == 0xfeff)
3447 avio_get_str16be(sc->pb, len, title, title_len);
3448 else if (ch == 0xfffe)
3449 avio_get_str16le(sc->pb, len, title, title_len);
3450 else {
3451 AV_WB16(title, ch);
3452 if (len == 1 || len == 2)
3453 title[len] = 0;
3454 else
3455 avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
3456 }
3457 }
3458
3459 avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
3460 av_freep(&title);
3461 }
3462finish:
3463 avio_seek(sc->pb, cur_pos, SEEK_SET);
3464}
3465
3466static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
3467 uint32_t value, int flags)
3468{
3469 AVTimecode tc;
3470 char buf[AV_TIMECODE_STR_SIZE];
3471 AVRational rate = {st->codec->time_base.den,
3472 st->codec->time_base.num};
3473 int ret = av_timecode_init(&tc, rate, flags, 0, s);
3474 if (ret < 0)
3475 return ret;
3476 av_dict_set(&st->metadata, "timecode",
3477 av_timecode_make_string(&tc, buf, value), 0);
3478 return 0;
3479}
3480
3481static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
3482{
3483 MOVStreamContext *sc = st->priv_data;
3484 int flags = 0;
3485 int64_t cur_pos = avio_tell(sc->pb);
3486 uint32_t value;
3487
3488 if (!st->nb_index_entries)
3489 return -1;
3490
3491 avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
3492 value = avio_rb32(s->pb);
3493
3494 if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
3495 if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
3496 if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
3497
3498 /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
3499 * not the case) and thus assume "frame number format" instead of QT one.
3500 * No sample with tmcd track can be found with a QT timecode at the moment,
3501 * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
3502 * format). */
3503 parse_timecode_in_framenum_format(s, st, value, flags);
3504
3505 avio_seek(sc->pb, cur_pos, SEEK_SET);
3506 return 0;
3507}
3508
3509static int mov_read_close(AVFormatContext *s)
3510{
3511 MOVContext *mov = s->priv_data;
3512 int i, j;
3513
3514 for (i = 0; i < s->nb_streams; i++) {
3515 AVStream *st = s->streams[i];
3516 MOVStreamContext *sc = st->priv_data;
3517
3518 av_freep(&sc->ctts_data);
3519 for (j = 0; j < sc->drefs_count; j++) {
3520 av_freep(&sc->drefs[j].path);
3521 av_freep(&sc->drefs[j].dir);
3522 }
3523 av_freep(&sc->drefs);
3524 if (!sc->pb_is_copied)
3525 avio_close(sc->pb);
3526 sc->pb = NULL;
3527 av_freep(&sc->chunk_offsets);
3528 av_freep(&sc->keyframes);
3529 av_freep(&sc->sample_sizes);
3530 av_freep(&sc->stps_data);
3531 av_freep(&sc->stsc_data);
3532 av_freep(&sc->stts_data);
3533 }
3534
3535 if (mov->dv_demux) {
3536 for (i = 0; i < mov->dv_fctx->nb_streams; i++) {
3537 av_freep(&mov->dv_fctx->streams[i]->codec);
3538 av_freep(&mov->dv_fctx->streams[i]);
3539 }
3540 av_freep(&mov->dv_fctx);
3541 av_freep(&mov->dv_demux);
3542 }
3543
3544 av_freep(&mov->trex_data);
3545 av_freep(&mov->bitrates);
3546
3547 return 0;
3548}
3549
3550static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
3551{
3552 int i;
3553
3554 for (i = 0; i < s->nb_streams; i++) {
3555 AVStream *st = s->streams[i];
3556 MOVStreamContext *sc = st->priv_data;
3557
3558 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3559 sc->timecode_track == tmcd_id)
3560 return 1;
3561 }
3562 return 0;
3563}
3564
3565/* look for a tmcd track not referenced by any video track, and export it globally */
3566static void export_orphan_timecode(AVFormatContext *s)
3567{
3568 int i;
3569
3570 for (i = 0; i < s->nb_streams; i++) {
3571 AVStream *st = s->streams[i];
3572
3573 if (st->codec->codec_tag == MKTAG('t','m','c','d') &&
3574 !tmcd_is_referenced(s, i + 1)) {
3575 AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
3576 if (tcr) {
3577 av_dict_set(&s->metadata, "timecode", tcr->value, 0);
3578 break;
3579 }
3580 }
3581 }
3582}
3583
3584static int mov_read_header(AVFormatContext *s)
3585{
3586 MOVContext *mov = s->priv_data;
3587 AVIOContext *pb = s->pb;
3588 int i, j, err;
3589 MOVAtom atom = { AV_RL32("root") };
3590
3591 mov->fc = s;
3592 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
3593 if (pb->seekable)
3594 atom.size = avio_size(pb);
3595 else
3596 atom.size = INT64_MAX;
3597
3598 /* check MOV header */
3599 if ((err = mov_read_default(mov, pb, atom)) < 0) {
3600 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
3601 mov_read_close(s);
3602 return err;
3603 }
3604 if (!mov->found_moov) {
3605 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
3606 mov_read_close(s);
3607 return AVERROR_INVALIDDATA;
3608 }
3609 av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
3610
3611 if (pb->seekable) {
3612 if (mov->chapter_track > 0)
3613 mov_read_chapters(s);
3614 for (i = 0; i < s->nb_streams; i++)
3615 if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
3616 mov_read_timecode_track(s, s->streams[i]);
3617 }
3618
3619 /* copy timecode metadata from tmcd tracks to the related video streams */
3620 for (i = 0; i < s->nb_streams; i++) {
3621 AVStream *st = s->streams[i];
3622 MOVStreamContext *sc = st->priv_data;
3623 if (sc->timecode_track > 0) {
3624 AVDictionaryEntry *tcr;
3625 int tmcd_st_id = -1;
3626
3627 for (j = 0; j < s->nb_streams; j++)
3628 if (s->streams[j]->id == sc->timecode_track)
3629 tmcd_st_id = j;
3630
3631 if (tmcd_st_id < 0 || tmcd_st_id == i)
3632 continue;
3633 tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
3634 if (tcr)
3635 av_dict_set(&st->metadata, "timecode", tcr->value, 0);
3636 }
3637 }
3638 export_orphan_timecode(s);
3639
3640 for (i = 0; i < s->nb_streams; i++) {
3641 AVStream *st = s->streams[i];
3642 MOVStreamContext *sc = st->priv_data;
3643 fix_timescale(mov, sc);
3644 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
3645 st->skip_samples = sc->start_pad;
3646 }
3647 }
3648
3649 if (mov->trex_data) {
3650 for (i = 0; i < s->nb_streams; i++) {
3651 AVStream *st = s->streams[i];
3652 MOVStreamContext *sc = st->priv_data;
3653 if (st->duration > 0)
3654 st->codec->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
3655 }
3656 }
3657
3658 for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
3659 if (mov->bitrates[i]) {
3660 s->streams[i]->codec->bit_rate = mov->bitrates[i];
3661 }
3662 }
3663
3664 return 0;
3665}
3666
3667static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
3668{
3669 AVIndexEntry *sample = NULL;
3670 int64_t best_dts = INT64_MAX;
3671 int i;
3672 for (i = 0; i < s->nb_streams; i++) {
3673 AVStream *avst = s->streams[i];
3674 MOVStreamContext *msc = avst->priv_data;
3675 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
3676 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
3677 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
3678 av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
3679 if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
3680 (s->pb->seekable &&
3681 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
3682 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
3683 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
3684 sample = current_sample;
3685 best_dts = dts;
3686 *st = avst;
3687 }
3688 }
3689 }
3690 return sample;
3691}
3692
3693static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
3694{
3695 MOVContext *mov = s->priv_data;
3696 MOVStreamContext *sc;
3697 AVIndexEntry *sample;
3698 AVStream *st = NULL;
3699 int ret;
3700 mov->fc = s;
3701 retry:
3702 sample = mov_find_next_sample(s, &st);
3703 if (!sample) {
3704 mov->found_mdat = 0;
3705 if (!mov->next_root_atom)
3706 return AVERROR_EOF;
3707 avio_seek(s->pb, mov->next_root_atom, SEEK_SET);
3708 mov->next_root_atom = 0;
3709 if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
3710 url_feof(s->pb))
3711 return AVERROR_EOF;
3712 av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
3713 goto retry;
3714 }
3715 sc = st->priv_data;
3716 /* must be done just before reading, to avoid infinite loop on sample */
3717 sc->current_sample++;
3718
3719 if (mov->next_root_atom) {
3720 sample->pos = FFMIN(sample->pos, mov->next_root_atom);
3721 sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
3722 }
3723
3724 if (st->discard != AVDISCARD_ALL) {
3725 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
3726 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
3727 sc->ffindex, sample->pos);
3728 return AVERROR_INVALIDDATA;
3729 }
3730 ret = av_get_packet(sc->pb, pkt, sample->size);
3731 if (ret < 0)
3732 return ret;
3733 if (sc->has_palette) {
3734 uint8_t *pal;
3735
3736 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3737 if (!pal) {
3738 av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
3739 } else {
3740 memcpy(pal, sc->palette, AVPALETTE_SIZE);
3741 sc->has_palette = 0;
3742 }
3743 }
3744#if CONFIG_DV_DEMUXER
3745 if (mov->dv_demux && sc->dv_audio_container) {
3746 avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
3747 av_free(pkt->data);
3748 pkt->size = 0;
3749 ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
3750 if (ret < 0)
3751 return ret;
3752 }
3753#endif
3754 }
3755
3756 pkt->stream_index = sc->ffindex;
3757 pkt->dts = sample->timestamp;
3758 if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
3759 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
3760 /* update ctts context */
3761 sc->ctts_sample++;
3762 if (sc->ctts_index < sc->ctts_count &&
3763 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
3764 sc->ctts_index++;
3765 sc->ctts_sample = 0;
3766 }
3767 if (sc->wrong_dts)
3768 pkt->dts = AV_NOPTS_VALUE;
3769 } else {
3770 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
3771 st->index_entries[sc->current_sample].timestamp : st->duration;
3772 pkt->duration = next_dts - pkt->dts;
3773 pkt->pts = pkt->dts;
3774 }
3775 if (st->discard == AVDISCARD_ALL)
3776 goto retry;
3777 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
3778 pkt->pos = sample->pos;
3779 av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
3780 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
3781 return 0;
3782}
3783
3784
3785static int64_t mov_read_seek_sync(AVFormatContext *s,
3786 int stream_index,
3787 int64_t min_ts,
3788 int64_t target_ts,
3789 int64_t max_ts,
3790 int flags)
3791{
3792 int64_t pos, t_pos;
3793
3794 int64_t ts_ret, ts_adj;
3795 int stream_index_gen_search = stream_index;
3796 int sample, i;
3797 AVStream *st;
3798 AVParserState *backup;
3799
3800 backup = ff_store_parser_state(s);
3801
3802 // detect direction of seeking for search purposes
3803 flags |= (target_ts - min_ts > (uint64_t)(max_ts - target_ts)) ?
3804 AVSEEK_FLAG_BACKWARD : 0;
3805
3806 st = s->streams[stream_index_gen_search];
3807 sample = av_index_search_timestamp(st, target_ts, AVSEEK_FLAG_ANY);
3808 pos = st->index_entries[sample].pos;
3809 target_ts = st->index_entries[sample].timestamp;
3810 for (i = 0; i < s->nb_streams; i++) {
3811 MOVStreamContext *sc = s->streams[i]->priv_data;
3812 sc->current_sample = (sample - 500) > 0 ? (sample - 500) : 0; // hard code for mov, repos the sample.
3813 }
3814
3815 // search for actual matching keyframe/starting position for all streams
3816 if ((t_pos = ff_gen_syncpoint_search(s, stream_index, pos,
3817 min_ts, target_ts, max_ts,
3818 flags)) < 0) {
3819 ff_restore_parser_state(s, backup);
3820 return -1;
3821 }
3822
3823 ff_free_parser_state(s, backup);
3824 return t_pos;
3825}
3826
3827static int64_t mov_read_seek2(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
3828 int ret;
3829 if (flags & AVSEEK_FLAG_BACKWARD) {
3830 flags &= ~AVSEEK_FLAG_BACKWARD;
3831 ret = mov_read_seek_sync(s, stream_index, INT64_MIN, target_ts, target_ts, flags);
3832 if (ret < 0) {
3833 // for compatibility reasons, seek to the best-fitting timestamp
3834 ret = mov_read_seek_sync(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
3835 }
3836 } else {
3837 ret = mov_read_seek_sync(s, stream_index, target_ts, target_ts, INT64_MAX, flags);
3838 if (ret < 0)
3839 // for compatibility reasons, seek to the best-fitting timestamp
3840 ret = mov_read_seek_sync(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
3841 }
3842 return ret;
3843}
3844
3845static int mov_index_search_pos(const AVIndexEntry *entries, int nb_entries,
3846 int64_t pos, int flags)
3847{
3848 int a, b, m;
3849 int64_t ppos;
3850
3851 a = - 1;
3852 b = nb_entries;
3853
3854 //optimize appending index entries at the end
3855 if(b && entries[b-1].pos < pos)
3856 a= b-1;
3857
3858 while (b - a > 1) {
3859 m = (a + b) >> 1;
3860 ppos = entries[m].pos;
3861 if(ppos >= pos)
3862 b = m;
3863 if(ppos <= pos)
3864 a = m;
3865 }
3866
3867 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
3868 return m;
3869}
3870
3871static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
3872{
3873 MOVStreamContext *sc = st->priv_data;
3874 int sample, time_sample;
3875 int i;
3876
3877 sample = av_index_search_timestamp(st, timestamp, flags);
3878
3879 // mov's stss is wrong sometimes, need to read seek
3880 // added by senbai.tao
3881 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && sample <=0 && st->nb_index_entries && sc->keyframe_count <= 1) {
3882 int64_t sync_point = mov_read_seek2(s, st->index, timestamp, flags);
3883 sample = mov_index_search_pos(st->index_entries, st->nb_index_entries, sync_point, AVSEEK_FLAG_ANY);
3884 }
3885
3886 av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
3887 if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
3888 sample = 0;
3889 if (sample < 0) /* not sure what to do */
3890 return AVERROR_INVALIDDATA;
3891 sc->current_sample = sample;
3892 av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
3893 /* adjust ctts index */
3894 if (sc->ctts_data) {
3895 time_sample = 0;
3896 for (i = 0; i < sc->ctts_count; i++) {
3897 int next = time_sample + sc->ctts_data[i].count;
3898 if (next > sc->current_sample) {
3899 sc->ctts_index = i;
3900 sc->ctts_sample = sc->current_sample - time_sample;
3901 break;
3902 }
3903 time_sample = next;
3904 }
3905 }
3906 return sample;
3907}
3908
3909static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3910{
3911 AVStream *st;
3912 int64_t seek_timestamp, timestamp;
3913 int sample;
3914 int i;
3915
3916 if (stream_index >= s->nb_streams)
3917 return AVERROR_INVALIDDATA;
3918
3919 st = s->streams[stream_index];
3920 sample = mov_seek_stream(s, st, sample_time, flags);
3921 if (sample < 0)
3922 return sample;
3923
3924 /* adjust seek timestamp to found sample timestamp */
3925 seek_timestamp = st->index_entries[sample].timestamp;
3926
3927 for (i = 0; i < s->nb_streams; i++) {
3928 MOVStreamContext *sc = s->streams[i]->priv_data;
3929 st = s->streams[i];
3930 st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
3931
3932 if (stream_index == i)
3933 continue;
3934
3935 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
3936 mov_seek_stream(s, st, timestamp, flags);
3937 }
3938 return 0;
3939}
3940
3941static const AVOption options[] = {
3942 {"use_absolute_path",
3943 "allow using absolute path when opening alias, this is a possible security issue",
3944 offsetof(MOVContext, use_absolute_path), FF_OPT_TYPE_INT, {.i64 = 0},
3945 0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3946 {"ignore_editlist", "", offsetof(MOVContext, ignore_editlist), FF_OPT_TYPE_INT, {.i64 = 0},
3947 0, 1, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM},
3948 {NULL}
3949};
3950
3951static const AVClass mov_class = {
3952 .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
3953 .item_name = av_default_item_name,
3954 .option = options,
3955 .version = LIBAVUTIL_VERSION_INT,
3956};
3957
3958AVInputFormat ff_mov_demuxer = {
3959 .name = "mov,mp4,m4a,3gp,3g2,mj2",
3960 .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
3961 .priv_data_size = sizeof(MOVContext),
3962 .read_probe = mov_probe,
3963 .read_header = mov_read_header,
3964 .read_packet = mov_read_packet,
3965 .read_close = mov_read_close,
3966 .read_seek = mov_read_seek,
3967 .priv_class = &mov_class,
3968 .flags = AVFMT_NO_BYTE_SEEK,
3969};
3970
generated by cgit at 2024-05-17 04:12:51 (GMT)