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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 <inttypes.h>
27#include <limits.h>
28#include <stdint.h>
29
30#include "libavutil/attributes.h"
31#include "libavutil/channel_layout.h"
32#include "libavutil/internal.h"
33#include "libavutil/intreadwrite.h"
34#include "libavutil/intfloat.h"
35#include "libavutil/mathematics.h"
36#include "libavutil/time_internal.h"
37#include "libavutil/avassert.h"
38#include "libavutil/avstring.h"
39#include "libavutil/dict.h"
40#include "libavutil/display.h"
41#include "libavutil/opt.h"
42#include "libavutil/aes.h"
43#include "libavutil/aes_ctr.h"
44#include "libavutil/pixdesc.h"
45#include "libavutil/sha.h"
46#include "libavutil/spherical.h"
47#include "libavutil/stereo3d.h"
48#include "libavutil/timecode.h"
49#include "libavcodec/ac3tab.h"
50#include "libavcodec/flac.h"
51#include "libavcodec/mpegaudiodecheader.h"
52#include "avformat.h"
53#include "internal.h"
54#include "avio_internal.h"
55#include "riff.h"
56#include "isom.h"
57#include "libavcodec/get_bits.h"
58#include "id3v1.h"
59#include "mov_chan.h"
60#include "replaygain.h"
61
62#if CONFIG_ZLIB
63#include <zlib.h>
64#endif
65
66#include "qtpalette.h"
67
68/* those functions parse an atom */
69/* links atom IDs to parse functions */
70typedef struct MOVParseTableEntry {
71 uint32_t type;
72 int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
73} MOVParseTableEntry;
74
75static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
76static int mov_read_mfra(MOVContext *c, AVIOContext *f);
77
78static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
79 unsigned len, const char *key)
80{
81 char buf[16];
82
83 short current, total = 0;
84 avio_rb16(pb); // unknown
85 current = avio_rb16(pb);
86 if (len >= 6)
87 total = avio_rb16(pb);
88 if (!total)
89 snprintf(buf, sizeof(buf), "%d", current);
90 else
91 snprintf(buf, sizeof(buf), "%d/%d", current, total);
92 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
93 av_dict_set(&c->fc->metadata, key, buf, 0);
94
95 return 0;
96}
97
98static int mov_metadata_int8_bypass_padding(MOVContext *c, AVIOContext *pb,
99 unsigned len, const char *key)
100{
101 /* bypass padding bytes */
102 avio_r8(pb);
103 avio_r8(pb);
104 avio_r8(pb);
105
106 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
107 av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
108
109 return 0;
110}
111
112static int mov_metadata_int8_no_padding(MOVContext *c, AVIOContext *pb,
113 unsigned len, const char *key)
114{
115 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
116 av_dict_set_int(&c->fc->metadata, key, avio_r8(pb), 0);
117
118 return 0;
119}
120
121static int mov_metadata_gnre(MOVContext *c, AVIOContext *pb,
122 unsigned len, const char *key)
123{
124 short genre;
125
126 avio_r8(pb); // unknown
127
128 genre = avio_r8(pb);
129 if (genre < 1 || genre > ID3v1_GENRE_MAX)
130 return 0;
131 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
132 av_dict_set(&c->fc->metadata, key, ff_id3v1_genre_str[genre-1], 0);
133
134 return 0;
135}
136
137static const uint32_t mac_to_unicode[128] = {
138 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
139 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
140 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
141 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
142 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
143 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
144 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
145 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
146 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
147 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
148 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
149 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
150 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
151 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
152 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
153 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
154};
155
156static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
157 char *dst, int dstlen)
158{
159 char *p = dst;
160 char *end = dst+dstlen-1;
161 int i;
162
163 for (i = 0; i < len; i++) {
164 uint8_t t, c = avio_r8(pb);
165 if (c < 0x80 && p < end)
166 *p++ = c;
167 else if (p < end)
168 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
169 }
170 *p = 0;
171 return p - dst;
172}
173
174static int mov_read_covr(MOVContext *c, AVIOContext *pb, int type, int len)
175{
176 AVPacket pkt;
177 AVStream *st;
178 MOVStreamContext *sc;
179 enum AVCodecID id;
180 int ret;
181
182 switch (type) {
183 case 0xd: id = AV_CODEC_ID_MJPEG; break;
184 case 0xe: id = AV_CODEC_ID_PNG; break;
185 case 0x1b: id = AV_CODEC_ID_BMP; break;
186 default:
187 av_log(c->fc, AV_LOG_WARNING, "Unknown cover type: 0x%x.\n", type);
188 avio_skip(pb, len);
189 return 0;
190 }
191
192 st = avformat_new_stream(c->fc, NULL);
193 if (!st)
194 return AVERROR(ENOMEM);
195 sc = av_mallocz(sizeof(*sc));
196 if (!sc)
197 return AVERROR(ENOMEM);
198 st->priv_data = sc;
199
200 ret = av_get_packet(pb, &pkt, len);
201 if (ret < 0)
202 return ret;
203
204 if (pkt.size >= 8 && id != AV_CODEC_ID_BMP) {
205 if (AV_RB64(pkt.data) == 0x89504e470d0a1a0a) {
206 id = AV_CODEC_ID_PNG;
207 } else {
208 id = AV_CODEC_ID_MJPEG;
209 }
210 }
211
212 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
213
214 st->attached_pic = pkt;
215 st->attached_pic.stream_index = st->index;
216 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
217
218 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
219 st->codecpar->codec_id = id;
220
221 return 0;
222}
223
224// 3GPP TS 26.244
225static int mov_metadata_loci(MOVContext *c, AVIOContext *pb, unsigned len)
226{
227 char language[4] = { 0 };
228 char buf[200], place[100];
229 uint16_t langcode = 0;
230 double longitude, latitude, altitude;
231 const char *key = "location";
232
233 if (len < 4 + 2 + 1 + 1 + 4 + 4 + 4) {
234 av_log(c->fc, AV_LOG_ERROR, "loci too short\n");
235 return AVERROR_INVALIDDATA;
236 }
237
238 avio_skip(pb, 4); // version+flags
239 langcode = avio_rb16(pb);
240 ff_mov_lang_to_iso639(langcode, language);
241 len -= 6;
242
243 len -= avio_get_str(pb, len, place, sizeof(place));
244 if (len < 1) {
245 av_log(c->fc, AV_LOG_ERROR, "place name too long\n");
246 return AVERROR_INVALIDDATA;
247 }
248 avio_skip(pb, 1); // role
249 len -= 1;
250
251 if (len < 12) {
252 av_log(c->fc, AV_LOG_ERROR,
253 "loci too short (%u bytes left, need at least %d)\n", len, 12);
254 return AVERROR_INVALIDDATA;
255 }
256 longitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
257 latitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
258 altitude = ((int32_t) avio_rb32(pb)) / (float) (1 << 16);
259
260 // Try to output in the same format as the ?xyz field
261 snprintf(buf, sizeof(buf), "%+08.4f%+09.4f", latitude, longitude);
262 if (altitude)
263 av_strlcatf(buf, sizeof(buf), "%+f", altitude);
264 av_strlcatf(buf, sizeof(buf), "/%s", place);
265
266 if (*language && strcmp(language, "und")) {
267 char key2[16];
268 snprintf(key2, sizeof(key2), "%s-%s", key, language);
269 av_dict_set(&c->fc->metadata, key2, buf, 0);
270 }
271 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
272 return av_dict_set(&c->fc->metadata, key, buf, 0);
273}
274
275static int mov_metadata_hmmt(MOVContext *c, AVIOContext *pb, unsigned len)
276{
277 int i, n_hmmt;
278
279 if (len < 2)
280 return 0;
281 if (c->ignore_chapters)
282 return 0;
283
284 n_hmmt = avio_rb32(pb);
285 for (i = 0; i < n_hmmt && !pb->eof_reached; i++) {
286 int moment_time = avio_rb32(pb);
287 avpriv_new_chapter(c->fc, i, av_make_q(1, 1000), moment_time, AV_NOPTS_VALUE, NULL);
288 }
289 return 0;
290}
291
292static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
293{
294 char tmp_key[5];
295 char key2[32], language[4] = {0};
296 char *str = NULL;
297 const char *key = NULL;
298 uint16_t langcode = 0;
299 uint32_t data_type = 0, str_size, str_size_alloc;
300 int (*parse)(MOVContext*, AVIOContext*, unsigned, const char*) = NULL;
301 int raw = 0;
302 int num = 0;
303
304 switch (atom.type) {
305 case MKTAG( '@','P','R','M'): key = "premiere_version"; raw = 1; break;
306 case MKTAG( '@','P','R','Q'): key = "quicktime_version"; raw = 1; break;
307 case MKTAG( 'X','M','P','_'):
308 if (c->export_xmp) { key = "xmp"; raw = 1; } break;
309 case MKTAG( 'a','A','R','T'): key = "album_artist"; break;
310 case MKTAG( 'a','k','I','D'): key = "account_type";
311 parse = mov_metadata_int8_no_padding; break;
312 case MKTAG( 'a','p','I','D'): key = "account_id"; break;
313 case MKTAG( 'c','a','t','g'): key = "category"; break;
314 case MKTAG( 'c','p','i','l'): key = "compilation";
315 parse = mov_metadata_int8_no_padding; break;
316 case MKTAG( 'c','p','r','t'): key = "copyright"; break;
317 case MKTAG( 'd','e','s','c'): key = "description"; break;
318 case MKTAG( 'd','i','s','k'): key = "disc";
319 parse = mov_metadata_track_or_disc_number; break;
320 case MKTAG( 'e','g','i','d'): key = "episode_uid";
321 parse = mov_metadata_int8_no_padding; break;
322 case MKTAG( 'F','I','R','M'): key = "firmware"; raw = 1; break;
323 case MKTAG( 'g','n','r','e'): key = "genre";
324 parse = mov_metadata_gnre; break;
325 case MKTAG( 'h','d','v','d'): key = "hd_video";
326 parse = mov_metadata_int8_no_padding; break;
327 case MKTAG( 'H','M','M','T'):
328 return mov_metadata_hmmt(c, pb, atom.size);
329 case MKTAG( 'k','e','y','w'): key = "keywords"; break;
330 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
331 case MKTAG( 'l','o','c','i'):
332 return mov_metadata_loci(c, pb, atom.size);
333 case MKTAG( 'p','c','s','t'): key = "podcast";
334 parse = mov_metadata_int8_no_padding; break;
335 case MKTAG( 'p','g','a','p'): key = "gapless_playback";
336 parse = mov_metadata_int8_no_padding; break;
337 case MKTAG( 'p','u','r','d'): key = "purchase_date"; break;
338 case MKTAG( 'r','t','n','g'): key = "rating";
339 parse = mov_metadata_int8_no_padding; break;
340 case MKTAG( 's','o','a','a'): key = "sort_album_artist"; break;
341 case MKTAG( 's','o','a','l'): key = "sort_album"; break;
342 case MKTAG( 's','o','a','r'): key = "sort_artist"; break;
343 case MKTAG( 's','o','c','o'): key = "sort_composer"; break;
344 case MKTAG( 's','o','n','m'): key = "sort_name"; break;
345 case MKTAG( 's','o','s','n'): key = "sort_show"; break;
346 case MKTAG( 's','t','i','k'): key = "media_type";
347 parse = mov_metadata_int8_no_padding; break;
348 case MKTAG( 't','r','k','n'): key = "track";
349 parse = mov_metadata_track_or_disc_number; break;
350 case MKTAG( 't','v','e','n'): key = "episode_id"; break;
351 case MKTAG( 't','v','e','s'): key = "episode_sort";
352 parse = mov_metadata_int8_bypass_padding; break;
353 case MKTAG( 't','v','n','n'): key = "network"; break;
354 case MKTAG( 't','v','s','h'): key = "show"; break;
355 case MKTAG( 't','v','s','n'): key = "season_number";
356 parse = mov_metadata_int8_bypass_padding; break;
357 case MKTAG(0xa9,'A','R','T'): key = "artist"; break;
358 case MKTAG(0xa9,'P','R','D'): key = "producer"; break;
359 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
360 case MKTAG(0xa9,'a','u','t'): key = "artist"; break;
361 case MKTAG(0xa9,'c','h','p'): key = "chapter"; break;
362 case MKTAG(0xa9,'c','m','t'): key = "comment"; break;
363 case MKTAG(0xa9,'c','o','m'): key = "composer"; break;
364 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
365 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
366 case MKTAG(0xa9,'d','i','r'): key = "director"; break;
367 case MKTAG(0xa9,'d','i','s'): key = "disclaimer"; break;
368 case MKTAG(0xa9,'e','d','1'): key = "edit_date"; break;
369 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
370 case MKTAG(0xa9,'f','m','t'): key = "original_format"; break;
371 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
372 case MKTAG(0xa9,'g','r','p'): key = "grouping"; break;
373 case MKTAG(0xa9,'h','s','t'): key = "host_computer"; break;
374 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
375 case MKTAG(0xa9,'l','y','r'): key = "lyrics"; break;
376 case MKTAG(0xa9,'m','a','k'): key = "make"; break;
377 case MKTAG(0xa9,'m','o','d'): key = "model"; break;
378 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
379 case MKTAG(0xa9,'o','p','e'): key = "original_artist"; break;
380 case MKTAG(0xa9,'p','r','d'): key = "producer"; break;
381 case MKTAG(0xa9,'p','r','f'): key = "performers"; break;
382 case MKTAG(0xa9,'r','e','q'): key = "playback_requirements"; break;
383 case MKTAG(0xa9,'s','r','c'): key = "original_source"; break;
384 case MKTAG(0xa9,'s','t','3'): key = "subtitle"; break;
385 case MKTAG(0xa9,'s','w','r'): key = "encoder"; break;
386 case MKTAG(0xa9,'t','o','o'): key = "encoder"; break;
387 case MKTAG(0xa9,'t','r','k'): key = "track"; break;
388 case MKTAG(0xa9,'u','r','l'): key = "URL"; break;
389 case MKTAG(0xa9,'w','r','n'): key = "warning"; break;
390 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
391 case MKTAG(0xa9,'x','y','z'): key = "location"; break;
392 }
393retry:
394 if (c->itunes_metadata && atom.size > 8) {
395 int data_size = avio_rb32(pb);
396 int tag = avio_rl32(pb);
397 if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) {
398 data_type = avio_rb32(pb); // type
399 avio_rb32(pb); // unknown
400 str_size = data_size - 16;
401 atom.size -= 16;
402
403 if (atom.type == MKTAG('c', 'o', 'v', 'r')) {
404 int ret = mov_read_covr(c, pb, data_type, str_size);
405 if (ret < 0) {
406 av_log(c->fc, AV_LOG_ERROR, "Error parsing cover art.\n");
407 }
408 return ret;
409 } else if (!key && c->found_hdlr_mdta && c->meta_keys) {
410 uint32_t index = AV_RB32(&atom.type);
411 if (index < c->meta_keys_count && index > 0) {
412 key = c->meta_keys[index];
413 } else {
414 av_log(c->fc, AV_LOG_WARNING,
415 "The index of 'data' is out of range: %"PRId32" < 1 or >= %d.\n",
416 index, c->meta_keys_count);
417 }
418 }
419 } else return 0;
420 } else if (atom.size > 4 && key && !c->itunes_metadata && !raw) {
421 str_size = avio_rb16(pb); // string length
422 if (str_size > atom.size) {
423 raw = 1;
424 avio_seek(pb, -2, SEEK_CUR);
425 av_log(c->fc, AV_LOG_WARNING, "UDTA parsing failed retrying raw\n");
426 goto retry;
427 }
428 langcode = avio_rb16(pb);
429 ff_mov_lang_to_iso639(langcode, language);
430 atom.size -= 4;
431 } else
432 str_size = atom.size;
433
434 if (c->export_all && !key) {
435 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
436 key = tmp_key;
437 }
438
439 if (!key)
440 return 0;
441 if (atom.size < 0 || str_size >= INT_MAX/2)
442 return AVERROR_INVALIDDATA;
443
444 // Allocates enough space if data_type is a int32 or float32 number, otherwise
445 // worst-case requirement for output string in case of utf8 coded input
446 num = (data_type >= 21 && data_type <= 23);
447 str_size_alloc = (num ? 512 : (raw ? str_size : str_size * 2)) + 1;
448 str = av_mallocz(str_size_alloc);
449 if (!str)
450 return AVERROR(ENOMEM);
451
452 if (parse)
453 parse(c, pb, str_size, key);
454 else {
455 if (!raw && (data_type == 3 || (data_type == 0 && (langcode < 0x400 || langcode == 0x7fff)))) { // MAC Encoded
456 mov_read_mac_string(c, pb, str_size, str, str_size_alloc);
457 } else if (data_type == 21) { // BE signed integer, variable size
458 int val = 0;
459 if (str_size == 1)
460 val = (int8_t)avio_r8(pb);
461 else if (str_size == 2)
462 val = (int16_t)avio_rb16(pb);
463 else if (str_size == 3)
464 val = ((int32_t)(avio_rb24(pb)<<8))>>8;
465 else if (str_size == 4)
466 val = (int32_t)avio_rb32(pb);
467 if (snprintf(str, str_size_alloc, "%d", val) >= str_size_alloc) {
468 av_log(c->fc, AV_LOG_ERROR,
469 "Failed to store the number (%d) in string.\n", val);
470 av_free(str);
471 return AVERROR_INVALIDDATA;
472 }
473 } else if (data_type == 22) { // BE unsigned integer, variable size
474 unsigned int val = 0;
475 if (str_size == 1)
476 val = avio_r8(pb);
477 else if (str_size == 2)
478 val = avio_rb16(pb);
479 else if (str_size == 3)
480 val = avio_rb24(pb);
481 else if (str_size == 4)
482 val = avio_rb32(pb);
483 if (snprintf(str, str_size_alloc, "%u", val) >= str_size_alloc) {
484 av_log(c->fc, AV_LOG_ERROR,
485 "Failed to store the number (%u) in string.\n", val);
486 av_free(str);
487 return AVERROR_INVALIDDATA;
488 }
489 } else if (data_type == 23 && str_size >= 4) { // BE float32
490 float val = av_int2float(avio_rb32(pb));
491 if (snprintf(str, str_size_alloc, "%f", val) >= str_size_alloc) {
492 av_log(c->fc, AV_LOG_ERROR,
493 "Failed to store the float32 number (%f) in string.\n", val);
494 av_free(str);
495 return AVERROR_INVALIDDATA;
496 }
497 } else {
498 int ret = ffio_read_size(pb, str, str_size);
499 if (ret < 0) {
500 av_free(str);
501 return ret;
502 }
503 str[str_size] = 0;
504 }
505 c->fc->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
506 av_dict_set(&c->fc->metadata, key, str, 0);
507 if (*language && strcmp(language, "und")) {
508 snprintf(key2, sizeof(key2), "%s-%s", key, language);
509 av_dict_set(&c->fc->metadata, key2, str, 0);
510 }
511 if (!strcmp(key, "encoder")) {
512 int major, minor, micro;
513 if (sscanf(str, "HandBrake %d.%d.%d", &major, &minor, &micro) == 3) {
514 c->handbrake_version = 1000000*major + 1000*minor + micro;
515 }
516 }
517 }
518
519 av_freep(&str);
520 return 0;
521}
522
523static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
524{
525 int64_t start;
526 int i, nb_chapters, str_len, version;
527 char str[256+1];
528 int ret;
529
530 if (c->ignore_chapters)
531 return 0;
532
533 if ((atom.size -= 5) < 0)
534 return 0;
535
536 version = avio_r8(pb);
537 avio_rb24(pb);
538 if (version)
539 avio_rb32(pb); // ???
540 nb_chapters = avio_r8(pb);
541
542 for (i = 0; i < nb_chapters; i++) {
543 if (atom.size < 9)
544 return 0;
545
546 start = avio_rb64(pb);
547 str_len = avio_r8(pb);
548
549 if ((atom.size -= 9+str_len) < 0)
550 return 0;
551
552 ret = ffio_read_size(pb, str, str_len);
553 if (ret < 0)
554 return ret;
555 str[str_len] = 0;
556 avpriv_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
557 }
558 return 0;
559}
560
561#define MIN_DATA_ENTRY_BOX_SIZE 12
562static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
563{
564 AVStream *st;
565 MOVStreamContext *sc;
566 int entries, i, j;
567
568 if (c->fc->nb_streams < 1)
569 return 0;
570 st = c->fc->streams[c->fc->nb_streams-1];
571 sc = st->priv_data;
572
573 avio_rb32(pb); // version + flags
574 entries = avio_rb32(pb);
575 if (!entries ||
576 entries > (atom.size - 1) / MIN_DATA_ENTRY_BOX_SIZE + 1 ||
577 entries >= UINT_MAX / sizeof(*sc->drefs))
578 return AVERROR_INVALIDDATA;
579 sc->drefs_count = 0;
580 av_free(sc->drefs);
581 sc->drefs_count = 0;
582 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
583 if (!sc->drefs)
584 return AVERROR(ENOMEM);
585 sc->drefs_count = entries;
586
587 for (i = 0; i < entries; i++) {
588 MOVDref *dref = &sc->drefs[i];
589 uint32_t size = avio_rb32(pb);
590 int64_t next = avio_tell(pb) + size - 4;
591
592 if (size < 12)
593 return AVERROR_INVALIDDATA;
594
595 dref->type = avio_rl32(pb);
596 avio_rb32(pb); // version + flags
597
598 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
599 /* macintosh alias record */
600 uint16_t volume_len, len;
601 int16_t type;
602 int ret;
603
604 avio_skip(pb, 10);
605
606 volume_len = avio_r8(pb);
607 volume_len = FFMIN(volume_len, 27);
608 ret = ffio_read_size(pb, dref->volume, 27);
609 if (ret < 0)
610 return ret;
611 dref->volume[volume_len] = 0;
612 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
613
614 avio_skip(pb, 12);
615
616 len = avio_r8(pb);
617 len = FFMIN(len, 63);
618 ret = ffio_read_size(pb, dref->filename, 63);
619 if (ret < 0)
620 return ret;
621 dref->filename[len] = 0;
622 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
623
624 avio_skip(pb, 16);
625
626 /* read next level up_from_alias/down_to_target */
627 dref->nlvl_from = avio_rb16(pb);
628 dref->nlvl_to = avio_rb16(pb);
629 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
630 dref->nlvl_from, dref->nlvl_to);
631
632 avio_skip(pb, 16);
633
634 for (type = 0; type != -1 && avio_tell(pb) < next; ) {
635 if(avio_feof(pb))
636 return AVERROR_EOF;
637 type = avio_rb16(pb);
638 len = avio_rb16(pb);
639 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
640 if (len&1)
641 len += 1;
642 if (type == 2) { // absolute path
643 av_free(dref->path);
644 dref->path = av_mallocz(len+1);
645 if (!dref->path)
646 return AVERROR(ENOMEM);
647
648 ret = ffio_read_size(pb, dref->path, len);
649 if (ret < 0) {
650 av_freep(&dref->path);
651 return ret;
652 }
653 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
654 len -= volume_len;
655 memmove(dref->path, dref->path+volume_len, len);
656 dref->path[len] = 0;
657 }
658 // trim string of any ending zeros
659 for (j = len - 1; j >= 0; j--) {
660 if (dref->path[j] == 0)
661 len--;
662 else
663 break;
664 }
665 for (j = 0; j < len; j++)
666 if (dref->path[j] == ':' || dref->path[j] == 0)
667 dref->path[j] = '/';
668 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
669 } else if (type == 0) { // directory name
670 av_free(dref->dir);
671 dref->dir = av_malloc(len+1);
672 if (!dref->dir)
673 return AVERROR(ENOMEM);
674
675 ret = ffio_read_size(pb, dref->dir, len);
676 if (ret < 0) {
677 av_freep(&dref->dir);
678 return ret;
679 }
680 dref->dir[len] = 0;
681 for (j = 0; j < len; j++)
682 if (dref->dir[j] == ':')
683 dref->dir[j] = '/';
684 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
685 } else
686 avio_skip(pb, len);
687 }
688 } else {
689 av_log(c->fc, AV_LOG_DEBUG, "Unknown dref type 0x%08"PRIx32" size %"PRIu32"\n",
690 dref->type, size);
691 entries--;
692 i--;
693 }
694 avio_seek(pb, next, SEEK_SET);
695 }
696 return 0;
697}
698
699static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
700{
701 AVStream *st;
702 uint32_t type;
703 uint32_t ctype;
704 int64_t title_size;
705 char *title_str;
706 int ret;
707
708 avio_r8(pb); /* version */
709 avio_rb24(pb); /* flags */
710
711 /* component type */
712 ctype = avio_rl32(pb);
713 type = avio_rl32(pb); /* component subtype */
714
715 av_log(c->fc, AV_LOG_TRACE, "ctype=%s\n", av_fourcc2str(ctype));
716 av_log(c->fc, AV_LOG_TRACE, "stype=%s\n", av_fourcc2str(type));
717
718 if (c->trak_index < 0) { // meta not inside a trak
719 if (type == MKTAG('m','d','t','a')) {
720 c->found_hdlr_mdta = 1;
721 }
722 return 0;
723 }
724
725 st = c->fc->streams[c->fc->nb_streams-1];
726
727 if (type == MKTAG('v','i','d','e'))
728 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
729 else if (type == MKTAG('s','o','u','n'))
730 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
731 else if (type == MKTAG('m','1','a',' '))
732 st->codecpar->codec_id = AV_CODEC_ID_MP2;
733 else if ((type == MKTAG('s','u','b','p')) || (type == MKTAG('c','l','c','p')))
734 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
735
736 avio_rb32(pb); /* component manufacture */
737 avio_rb32(pb); /* component flags */
738 avio_rb32(pb); /* component flags mask */
739
740 title_size = atom.size - 24;
741 if (title_size > 0) {
742 if (title_size > FFMIN(INT_MAX, SIZE_MAX-1))
743 return AVERROR_INVALIDDATA;
744 title_str = av_malloc(title_size + 1); /* Add null terminator */
745 if (!title_str)
746 return AVERROR(ENOMEM);
747
748 ret = ffio_read_size(pb, title_str, title_size);
749 if (ret < 0) {
750 av_freep(&title_str);
751 return ret;
752 }
753 title_str[title_size] = 0;
754 if (title_str[0]) {
755 int off = (!c->isom && title_str[0] == title_size - 1);
756 av_dict_set(&st->metadata, "handler_name", title_str + off, 0);
757 }
758 av_freep(&title_str);
759 }
760
761 return 0;
762}
763
764int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
765{
766 AVStream *st;
767 int tag;
768
769 if (fc->nb_streams < 1)
770 return 0;
771 st = fc->streams[fc->nb_streams-1];
772
773 avio_rb32(pb); /* version + flags */
774 ff_mp4_read_descr(fc, pb, &tag);
775 if (tag == MP4ESDescrTag) {
776 ff_mp4_parse_es_descr(pb, NULL);
777 } else
778 avio_rb16(pb); /* ID */
779
780 ff_mp4_read_descr(fc, pb, &tag);
781 if (tag == MP4DecConfigDescrTag)
782 ff_mp4_read_dec_config_descr(fc, st, pb);
783 return 0;
784}
785
786static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
787{
788 return ff_mov_read_esds(c->fc, pb);
789}
790
791static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
792{
793 AVStream *st;
794 enum AVAudioServiceType *ast;
795 int ac3info, acmod, lfeon, bsmod;
796
797 if (c->fc->nb_streams < 1)
798 return 0;
799 st = c->fc->streams[c->fc->nb_streams-1];
800
801 ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
802 sizeof(*ast));
803 if (!ast)
804 return AVERROR(ENOMEM);
805
806 ac3info = avio_rb24(pb);
807 bsmod = (ac3info >> 14) & 0x7;
808 acmod = (ac3info >> 11) & 0x7;
809 lfeon = (ac3info >> 10) & 0x1;
810 st->codecpar->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
811 st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
812 if (lfeon)
813 st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
814 *ast = bsmod;
815 if (st->codecpar->channels > 1 && bsmod == 0x7)
816 *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
817
818#if FF_API_LAVF_AVCTX
819 FF_DISABLE_DEPRECATION_WARNINGS
820 st->codec->audio_service_type = *ast;
821 FF_ENABLE_DEPRECATION_WARNINGS
822#endif
823
824 return 0;
825}
826
827static int mov_read_dec3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
828{
829 AVStream *st;
830 enum AVAudioServiceType *ast;
831 int eac3info, acmod, lfeon, bsmod;
832
833 if (c->fc->nb_streams < 1)
834 return 0;
835 st = c->fc->streams[c->fc->nb_streams-1];
836
837 ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
838 sizeof(*ast));
839 if (!ast)
840 return AVERROR(ENOMEM);
841
842 /* No need to parse fields for additional independent substreams and its
843 * associated dependent substreams since libavcodec's E-AC-3 decoder
844 * does not support them yet. */
845 avio_rb16(pb); /* data_rate and num_ind_sub */
846 eac3info = avio_rb24(pb);
847 bsmod = (eac3info >> 12) & 0x1f;
848 acmod = (eac3info >> 9) & 0x7;
849 lfeon = (eac3info >> 8) & 0x1;
850 st->codecpar->channel_layout = avpriv_ac3_channel_layout_tab[acmod];
851 if (lfeon)
852 st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
853 st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
854 *ast = bsmod;
855 if (st->codecpar->channels > 1 && bsmod == 0x7)
856 *ast = AV_AUDIO_SERVICE_TYPE_KARAOKE;
857
858#if FF_API_LAVF_AVCTX
859 FF_DISABLE_DEPRECATION_WARNINGS
860 st->codec->audio_service_type = *ast;
861 FF_ENABLE_DEPRECATION_WARNINGS
862#endif
863
864 return 0;
865}
866
867static int mov_read_ddts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
868{
869 const uint32_t ddts_size = 20;
870 AVStream *st = NULL;
871 uint8_t *buf = NULL;
872 uint32_t frame_duration_code = 0;
873 uint32_t channel_layout_code = 0;
874 GetBitContext gb;
875
876 buf = av_malloc(ddts_size + AV_INPUT_BUFFER_PADDING_SIZE);
877 if (!buf) {
878 return AVERROR(ENOMEM);
879 }
880 if (avio_read(pb, buf, ddts_size) < ddts_size) {
881 av_free(buf);
882 return AVERROR_INVALIDDATA;
883 }
884
885 init_get_bits(&gb, buf, 8*ddts_size);
886
887 if (c->fc->nb_streams < 1) {
888 return 0;
889 }
890 st = c->fc->streams[c->fc->nb_streams-1];
891
892 st->codecpar->sample_rate = get_bits_long(&gb, 32);
893 if (st->codecpar->sample_rate <= 0) {
894 av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
895 return AVERROR_INVALIDDATA;
896 }
897 skip_bits_long(&gb, 32); /* max bitrate */
898 st->codecpar->bit_rate = get_bits_long(&gb, 32);
899 st->codecpar->bits_per_coded_sample = get_bits(&gb, 8);
900 frame_duration_code = get_bits(&gb, 2);
901 skip_bits(&gb, 30); /* various fields */
902 channel_layout_code = get_bits(&gb, 16);
903
904 st->codecpar->frame_size =
905 (frame_duration_code == 0) ? 512 :
906 (frame_duration_code == 1) ? 1024 :
907 (frame_duration_code == 2) ? 2048 :
908 (frame_duration_code == 3) ? 4096 : 0;
909
910 if (channel_layout_code > 0xff) {
911 av_log(c->fc, AV_LOG_WARNING, "Unsupported DTS audio channel layout");
912 }
913 st->codecpar->channel_layout =
914 ((channel_layout_code & 0x1) ? AV_CH_FRONT_CENTER : 0) |
915 ((channel_layout_code & 0x2) ? AV_CH_FRONT_LEFT : 0) |
916 ((channel_layout_code & 0x2) ? AV_CH_FRONT_RIGHT : 0) |
917 ((channel_layout_code & 0x4) ? AV_CH_SIDE_LEFT : 0) |
918 ((channel_layout_code & 0x4) ? AV_CH_SIDE_RIGHT : 0) |
919 ((channel_layout_code & 0x8) ? AV_CH_LOW_FREQUENCY : 0);
920
921 st->codecpar->channels = av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
922
923 return 0;
924}
925
926static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
927{
928 AVStream *st;
929
930 if (c->fc->nb_streams < 1)
931 return 0;
932 st = c->fc->streams[c->fc->nb_streams-1];
933
934 if (atom.size < 16)
935 return 0;
936
937 /* skip version and flags */
938 avio_skip(pb, 4);
939
940 ff_mov_read_chan(c->fc, pb, st, atom.size - 4);
941
942 return 0;
943}
944
945static int mov_read_wfex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
946{
947 AVStream *st;
948 int ret;
949
950 if (c->fc->nb_streams < 1)
951 return 0;
952 st = c->fc->streams[c->fc->nb_streams-1];
953
954 if ((ret = ff_get_wav_header(c->fc, pb, st->codecpar, atom.size, 0)) < 0)
955 av_log(c->fc, AV_LOG_WARNING, "get_wav_header failed\n");
956
957 return ret;
958}
959
960static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
961{
962 const int num = avio_rb32(pb);
963 const int den = avio_rb32(pb);
964 AVStream *st;
965
966 if (c->fc->nb_streams < 1)
967 return 0;
968 st = c->fc->streams[c->fc->nb_streams-1];
969
970 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
971 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
972 av_log(c->fc, AV_LOG_WARNING,
973 "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
974 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
975 num, den);
976 } else if (den != 0) {
977 av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den,
978 num, den, 32767);
979 }
980 return 0;
981}
982
983/* this atom contains actual media data */
984static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
985{
986 if (atom.size == 0) /* wrong one (MP4) */
987 return 0;
988 c->found_mdat=1;
989 return 0; /* now go for moov */
990}
991
992#define DRM_BLOB_SIZE 56
993
994static int mov_read_adrm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
995{
996 uint8_t intermediate_key[20];
997 uint8_t intermediate_iv[20];
998 uint8_t input[64];
999 uint8_t output[64];
1000 uint8_t file_checksum[20];
1001 uint8_t calculated_checksum[20];
1002 struct AVSHA *sha;
1003 int i;
1004 int ret = 0;
1005 uint8_t *activation_bytes = c->activation_bytes;
1006 uint8_t *fixed_key = c->audible_fixed_key;
1007
1008 c->aax_mode = 1;
1009
1010 sha = av_sha_alloc();
1011 if (!sha)
1012 return AVERROR(ENOMEM);
1013 c->aes_decrypt = av_aes_alloc();
1014 if (!c->aes_decrypt) {
1015 ret = AVERROR(ENOMEM);
1016 goto fail;
1017 }
1018
1019 /* drm blob processing */
1020 avio_read(pb, output, 8); // go to offset 8, absolute position 0x251
1021 avio_read(pb, input, DRM_BLOB_SIZE);
1022 avio_read(pb, output, 4); // go to offset 4, absolute position 0x28d
1023 avio_read(pb, file_checksum, 20);
1024
1025 av_log(c->fc, AV_LOG_INFO, "[aax] file checksum == "); // required by external tools
1026 for (i = 0; i < 20; i++)
1027 av_log(c->fc, AV_LOG_INFO, "%02x", file_checksum[i]);
1028 av_log(c->fc, AV_LOG_INFO, "\n");
1029
1030 /* verify activation data */
1031 if (!activation_bytes) {
1032 av_log(c->fc, AV_LOG_WARNING, "[aax] activation_bytes option is missing!\n");
1033 ret = 0; /* allow ffprobe to continue working on .aax files */
1034 goto fail;
1035 }
1036 if (c->activation_bytes_size != 4) {
1037 av_log(c->fc, AV_LOG_FATAL, "[aax] activation_bytes value needs to be 4 bytes!\n");
1038 ret = AVERROR(EINVAL);
1039 goto fail;
1040 }
1041
1042 /* verify fixed key */
1043 if (c->audible_fixed_key_size != 16) {
1044 av_log(c->fc, AV_LOG_FATAL, "[aax] audible_fixed_key value needs to be 16 bytes!\n");
1045 ret = AVERROR(EINVAL);
1046 goto fail;
1047 }
1048
1049 /* AAX (and AAX+) key derivation */
1050 av_sha_init(sha, 160);
1051 av_sha_update(sha, fixed_key, 16);
1052 av_sha_update(sha, activation_bytes, 4);
1053 av_sha_final(sha, intermediate_key);
1054 av_sha_init(sha, 160);
1055 av_sha_update(sha, fixed_key, 16);
1056 av_sha_update(sha, intermediate_key, 20);
1057 av_sha_update(sha, activation_bytes, 4);
1058 av_sha_final(sha, intermediate_iv);
1059 av_sha_init(sha, 160);
1060 av_sha_update(sha, intermediate_key, 16);
1061 av_sha_update(sha, intermediate_iv, 16);
1062 av_sha_final(sha, calculated_checksum);
1063 if (memcmp(calculated_checksum, file_checksum, 20)) { // critical error
1064 av_log(c->fc, AV_LOG_ERROR, "[aax] mismatch in checksums!\n");
1065 ret = AVERROR_INVALIDDATA;
1066 goto fail;
1067 }
1068 av_aes_init(c->aes_decrypt, intermediate_key, 128, 1);
1069 av_aes_crypt(c->aes_decrypt, output, input, DRM_BLOB_SIZE >> 4, intermediate_iv, 1);
1070 for (i = 0; i < 4; i++) {
1071 // file data (in output) is stored in big-endian mode
1072 if (activation_bytes[i] != output[3 - i]) { // critical error
1073 av_log(c->fc, AV_LOG_ERROR, "[aax] error in drm blob decryption!\n");
1074 ret = AVERROR_INVALIDDATA;
1075 goto fail;
1076 }
1077 }
1078 memcpy(c->file_key, output + 8, 16);
1079 memcpy(input, output + 26, 16);
1080 av_sha_init(sha, 160);
1081 av_sha_update(sha, input, 16);
1082 av_sha_update(sha, c->file_key, 16);
1083 av_sha_update(sha, fixed_key, 16);
1084 av_sha_final(sha, c->file_iv);
1085
1086fail:
1087 av_free(sha);
1088
1089 return ret;
1090}
1091
1092// Audible AAX (and AAX+) bytestream decryption
1093static int aax_filter(uint8_t *input, int size, MOVContext *c)
1094{
1095 int blocks = 0;
1096 unsigned char iv[16];
1097
1098 memcpy(iv, c->file_iv, 16); // iv is overwritten
1099 blocks = size >> 4; // trailing bytes are not encrypted!
1100 av_aes_init(c->aes_decrypt, c->file_key, 128, 1);
1101 av_aes_crypt(c->aes_decrypt, input, input, blocks, iv, 1);
1102
1103 return 0;
1104}
1105
1106/* read major brand, minor version and compatible brands and store them as metadata */
1107static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1108{
1109 uint32_t minor_ver;
1110 int comp_brand_size;
1111 char* comp_brands_str;
1112 uint8_t type[5] = {0};
1113 int ret = ffio_read_size(pb, type, 4);
1114 if (ret < 0)
1115 return ret;
1116
1117 if (strcmp(type, "qt "))
1118 c->isom = 1;
1119 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
1120 av_dict_set(&c->fc->metadata, "major_brand", type, 0);
1121 minor_ver = avio_rb32(pb); /* minor version */
1122 av_dict_set_int(&c->fc->metadata, "minor_version", minor_ver, 0);
1123
1124 comp_brand_size = atom.size - 8;
1125 if (comp_brand_size < 0)
1126 return AVERROR_INVALIDDATA;
1127 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
1128 if (!comp_brands_str)
1129 return AVERROR(ENOMEM);
1130
1131 ret = ffio_read_size(pb, comp_brands_str, comp_brand_size);
1132 if (ret < 0) {
1133 av_freep(&comp_brands_str);
1134 return ret;
1135 }
1136 comp_brands_str[comp_brand_size] = 0;
1137 av_dict_set(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
1138 av_freep(&comp_brands_str);
1139
1140 return 0;
1141}
1142
1143/* this atom should contain all header atoms */
1144static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1145{
1146 int ret;
1147
1148 if (c->found_moov) {
1149 av_log(c->fc, AV_LOG_WARNING, "Found duplicated MOOV Atom. Skipped it\n");
1150 avio_skip(pb, atom.size);
1151 return 0;
1152 }
1153
1154 if ((ret = mov_read_default(c, pb, atom)) < 0)
1155 return ret;
1156 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
1157 /* so we don't parse the whole file if over a network */
1158 c->found_moov=1;
1159 return 0; /* now go for mdat */
1160}
1161
1162static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1163{
1164 if (!c->has_looked_for_mfra && c->use_mfra_for > 0) {
1165 c->has_looked_for_mfra = 1;
1166 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1167 int ret;
1168 av_log(c->fc, AV_LOG_VERBOSE, "stream has moof boxes, will look "
1169 "for a mfra\n");
1170 if ((ret = mov_read_mfra(c, pb)) < 0) {
1171 av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but failed to "
1172 "read the mfra (may be a live ismv)\n");
1173 }
1174 } else {
1175 av_log(c->fc, AV_LOG_VERBOSE, "found a moof box but stream is not "
1176 "seekable, can not look for mfra\n");
1177 }
1178 }
1179 c->fragment.moof_offset = c->fragment.implicit_offset = avio_tell(pb) - 8;
1180 av_log(c->fc, AV_LOG_TRACE, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
1181 return mov_read_default(c, pb, atom);
1182}
1183
1184static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
1185{
1186 if (time) {
1187 if(time >= 2082844800)
1188 time -= 2082844800; /* seconds between 1904-01-01 and Epoch */
1189
1190 if ((int64_t)(time * 1000000ULL) / 1000000 != time) {
1191 av_log(NULL, AV_LOG_DEBUG, "creation_time is not representable\n");
1192 return;
1193 }
1194
1195 avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
1196 }
1197}
1198
1199static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1200{
1201 AVStream *st;
1202 MOVStreamContext *sc;
1203 int version;
1204 char language[4] = {0};
1205 unsigned lang;
1206 int64_t creation_time;
1207
1208 if (c->fc->nb_streams < 1)
1209 return 0;
1210 st = c->fc->streams[c->fc->nb_streams-1];
1211 sc = st->priv_data;
1212
1213 if (sc->time_scale) {
1214 av_log(c->fc, AV_LOG_ERROR, "Multiple mdhd?\n");
1215 return AVERROR_INVALIDDATA;
1216 }
1217
1218 version = avio_r8(pb);
1219 if (version > 1) {
1220 avpriv_request_sample(c->fc, "Version %d", version);
1221 return AVERROR_PATCHWELCOME;
1222 }
1223 avio_rb24(pb); /* flags */
1224 if (version == 1) {
1225 creation_time = avio_rb64(pb);
1226 avio_rb64(pb);
1227 } else {
1228 creation_time = avio_rb32(pb);
1229 avio_rb32(pb); /* modification time */
1230 }
1231 mov_metadata_creation_time(&st->metadata, creation_time);
1232
1233 sc->time_scale = avio_rb32(pb);
1234 if (sc->time_scale <= 0) {
1235 av_log(c->fc, AV_LOG_ERROR, "Invalid mdhd time scale %d\n", sc->time_scale);
1236 return AVERROR_INVALIDDATA;
1237 }
1238 st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1239
1240 lang = avio_rb16(pb); /* language */
1241 if (ff_mov_lang_to_iso639(lang, language))
1242 av_dict_set(&st->metadata, "language", language, 0);
1243 avio_rb16(pb); /* quality */
1244
1245 return 0;
1246}
1247
1248static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1249{
1250 int i;
1251 int64_t creation_time;
1252 int version = avio_r8(pb); /* version */
1253 avio_rb24(pb); /* flags */
1254
1255 if (version == 1) {
1256 creation_time = avio_rb64(pb);
1257 avio_rb64(pb);
1258 } else {
1259 creation_time = avio_rb32(pb);
1260 avio_rb32(pb); /* modification time */
1261 }
1262 mov_metadata_creation_time(&c->fc->metadata, creation_time);
1263 c->time_scale = avio_rb32(pb); /* time scale */
1264 if (c->time_scale <= 0) {
1265 av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d\n", c->time_scale);
1266 return AVERROR_INVALIDDATA;
1267 }
1268 av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1269
1270 c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1271 // set the AVCodecContext duration because the duration of individual tracks
1272 // may be inaccurate
1273 if (c->time_scale > 0 && !c->trex_data)
1274 c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
1275 avio_rb32(pb); /* preferred scale */
1276
1277 avio_rb16(pb); /* preferred volume */
1278
1279 avio_skip(pb, 10); /* reserved */
1280
1281 /* movie display matrix, store it in main context and use it later on */
1282 for (i = 0; i < 3; i++) {
1283 c->movie_display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
1284 c->movie_display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
1285 c->movie_display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
1286 }
1287
1288 avio_rb32(pb); /* preview time */
1289 avio_rb32(pb); /* preview duration */
1290 avio_rb32(pb); /* poster time */
1291 avio_rb32(pb); /* selection time */
1292 avio_rb32(pb); /* selection duration */
1293 avio_rb32(pb); /* current time */
1294 avio_rb32(pb); /* next track ID */
1295
1296 return 0;
1297}
1298
1299static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1300{
1301 AVStream *st;
1302 int little_endian;
1303
1304 if (c->fc->nb_streams < 1)
1305 return 0;
1306 st = c->fc->streams[c->fc->nb_streams-1];
1307
1308 little_endian = avio_rb16(pb) & 0xFF;
1309 av_log(c->fc, AV_LOG_TRACE, "enda %d\n", little_endian);
1310 if (little_endian == 1) {
1311 switch (st->codecpar->codec_id) {
1312 case AV_CODEC_ID_PCM_S24BE:
1313 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
1314 break;
1315 case AV_CODEC_ID_PCM_S32BE:
1316 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
1317 break;
1318 case AV_CODEC_ID_PCM_F32BE:
1319 st->codecpar->codec_id = AV_CODEC_ID_PCM_F32LE;
1320 break;
1321 case AV_CODEC_ID_PCM_F64BE:
1322 st->codecpar->codec_id = AV_CODEC_ID_PCM_F64LE;
1323 break;
1324 default:
1325 break;
1326 }
1327 }
1328 return 0;
1329}
1330
1331static int mov_read_colr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1332{
1333 AVStream *st;
1334 char color_parameter_type[5] = { 0 };
1335 uint16_t color_primaries, color_trc, color_matrix;
1336 int ret;
1337
1338 if (c->fc->nb_streams < 1)
1339 return 0;
1340 st = c->fc->streams[c->fc->nb_streams - 1];
1341
1342 ret = ffio_read_size(pb, color_parameter_type, 4);
1343 if (ret < 0)
1344 return ret;
1345 if (strncmp(color_parameter_type, "nclx", 4) &&
1346 strncmp(color_parameter_type, "nclc", 4)) {
1347 av_log(c->fc, AV_LOG_WARNING, "unsupported color_parameter_type %s\n",
1348 color_parameter_type);
1349 return 0;
1350 }
1351
1352 color_primaries = avio_rb16(pb);
1353 color_trc = avio_rb16(pb);
1354 color_matrix = avio_rb16(pb);
1355
1356 av_log(c->fc, AV_LOG_TRACE,
1357 "%s: pri %d trc %d matrix %d",
1358 color_parameter_type, color_primaries, color_trc, color_matrix);
1359
1360 if (!strncmp(color_parameter_type, "nclx", 4)) {
1361 uint8_t color_range = avio_r8(pb) >> 7;
1362 av_log(c->fc, AV_LOG_TRACE, " full %"PRIu8"", color_range);
1363 if (color_range)
1364 st->codecpar->color_range = AVCOL_RANGE_JPEG;
1365 else
1366 st->codecpar->color_range = AVCOL_RANGE_MPEG;
1367 }
1368
1369 if (!av_color_primaries_name(color_primaries))
1370 color_primaries = AVCOL_PRI_UNSPECIFIED;
1371 if (!av_color_transfer_name(color_trc))
1372 color_trc = AVCOL_TRC_UNSPECIFIED;
1373 if (!av_color_space_name(color_matrix))
1374 color_matrix = AVCOL_SPC_UNSPECIFIED;
1375
1376 st->codecpar->color_primaries = color_primaries;
1377 st->codecpar->color_trc = color_trc;
1378 st->codecpar->color_space = color_matrix;
1379 av_log(c->fc, AV_LOG_TRACE, "\n");
1380
1381 return 0;
1382}
1383
1384static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1385{
1386 AVStream *st;
1387 unsigned mov_field_order;
1388 enum AVFieldOrder decoded_field_order = AV_FIELD_UNKNOWN;
1389
1390 if (c->fc->nb_streams < 1) // will happen with jp2 files
1391 return 0;
1392 st = c->fc->streams[c->fc->nb_streams-1];
1393 if (atom.size < 2)
1394 return AVERROR_INVALIDDATA;
1395 mov_field_order = avio_rb16(pb);
1396 if ((mov_field_order & 0xFF00) == 0x0100)
1397 decoded_field_order = AV_FIELD_PROGRESSIVE;
1398 else if ((mov_field_order & 0xFF00) == 0x0200) {
1399 switch (mov_field_order & 0xFF) {
1400 case 0x01: decoded_field_order = AV_FIELD_TT;
1401 break;
1402 case 0x06: decoded_field_order = AV_FIELD_BB;
1403 break;
1404 case 0x09: decoded_field_order = AV_FIELD_TB;
1405 break;
1406 case 0x0E: decoded_field_order = AV_FIELD_BT;
1407 break;
1408 }
1409 }
1410 if (decoded_field_order == AV_FIELD_UNKNOWN && mov_field_order) {
1411 av_log(NULL, AV_LOG_ERROR, "Unknown MOV field order 0x%04x\n", mov_field_order);
1412 }
1413 st->codecpar->field_order = decoded_field_order;
1414
1415 return 0;
1416}
1417
1418static int mov_realloc_extradata(AVCodecParameters *par, MOVAtom atom)
1419{
1420 int err = 0;
1421 uint64_t size = (uint64_t)par->extradata_size + atom.size + 8 + AV_INPUT_BUFFER_PADDING_SIZE;
1422 if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
1423 return AVERROR_INVALIDDATA;
1424 if ((err = av_reallocp(&par->extradata, size)) < 0) {
1425 par->extradata_size = 0;
1426 return err;
1427 }
1428 par->extradata_size = size - AV_INPUT_BUFFER_PADDING_SIZE;
1429 return 0;
1430}
1431
1432/* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
1433static int64_t mov_read_atom_into_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1434 AVCodecParameters *par, uint8_t *buf)
1435{
1436 int64_t result = atom.size;
1437 int err;
1438
1439 AV_WB32(buf , atom.size + 8);
1440 AV_WL32(buf + 4, atom.type);
1441 err = ffio_read_size(pb, buf + 8, atom.size);
1442 if (err < 0) {
1443 par->extradata_size -= atom.size;
1444 return err;
1445 } else if (err < atom.size) {
1446 av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
1447 par->extradata_size -= atom.size - err;
1448 result = err;
1449 }
1450 memset(buf + 8 + err, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1451 return result;
1452}
1453
1454/* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
1455static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
1456 enum AVCodecID codec_id)
1457{
1458 AVStream *st;
1459 uint64_t original_size;
1460 int err;
1461
1462 if (c->fc->nb_streams < 1) // will happen with jp2 files
1463 return 0;
1464 st = c->fc->streams[c->fc->nb_streams-1];
1465
1466 if (st->codecpar->codec_id != codec_id)
1467 return 0; /* unexpected codec_id - don't mess with extradata */
1468
1469 original_size = st->codecpar->extradata_size;
1470 err = mov_realloc_extradata(st->codecpar, atom);
1471 if (err)
1472 return err;
1473
1474 err = mov_read_atom_into_extradata(c, pb, atom, st->codecpar, st->codecpar->extradata + original_size);
1475 if (err < 0)
1476 return err;
1477 return 0; // Note: this is the original behavior to ignore truncation.
1478}
1479
1480/* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
1481static int mov_read_alac(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1482{
1483 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_ALAC);
1484}
1485
1486static int mov_read_avss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1487{
1488 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVS);
1489}
1490
1491static int mov_read_jp2h(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1492{
1493 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_JPEG2000);
1494}
1495
1496static int mov_read_dpxe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1497{
1498 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_R10K);
1499}
1500
1501static int mov_read_avid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1502{
1503 int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_AVUI);
1504 if(ret == 0)
1505 ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_DNXHD);
1506 return ret;
1507}
1508
1509static int mov_read_targa_y216(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1510{
1511 int ret = mov_read_extradata(c, pb, atom, AV_CODEC_ID_TARGA_Y216);
1512
1513 if (!ret && c->fc->nb_streams >= 1) {
1514 AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1515 if (par->extradata_size >= 40) {
1516 par->height = AV_RB16(&par->extradata[36]);
1517 par->width = AV_RB16(&par->extradata[38]);
1518 }
1519 }
1520 return ret;
1521}
1522
1523static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1524{
1525 if (c->fc->nb_streams >= 1) {
1526 AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1527 if (par->codec_tag == MKTAG('A', 'V', 'i', 'n') &&
1528 par->codec_id == AV_CODEC_ID_H264 &&
1529 atom.size > 11) {
1530 int cid;
1531 avio_skip(pb, 10);
1532 cid = avio_rb16(pb);
1533 /* For AVID AVCI50, force width of 1440 to be able to select the correct SPS and PPS */
1534 if (cid == 0xd4d || cid == 0xd4e)
1535 par->width = 1440;
1536 return 0;
1537 } else if ((par->codec_tag == MKTAG('A', 'V', 'd', '1') ||
1538 par->codec_tag == MKTAG('A', 'V', 'd', 'n')) &&
1539 atom.size >= 24) {
1540 int num, den;
1541 avio_skip(pb, 12);
1542 num = avio_rb32(pb);
1543 den = avio_rb32(pb);
1544 if (num <= 0 || den <= 0)
1545 return 0;
1546 switch (avio_rb32(pb)) {
1547 case 2:
1548 if (den >= INT_MAX / 2)
1549 return 0;
1550 den *= 2;
1551 case 1:
1552 c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.num = num;
1553 c->fc->streams[c->fc->nb_streams-1]->display_aspect_ratio.den = den;
1554 default:
1555 return 0;
1556 }
1557 }
1558 }
1559
1560 return mov_read_avid(c, pb, atom);
1561}
1562
1563static int mov_read_aclr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1564{
1565 int ret = 0;
1566 int length = 0;
1567 uint64_t original_size;
1568 if (c->fc->nb_streams >= 1) {
1569 AVCodecParameters *par = c->fc->streams[c->fc->nb_streams-1]->codecpar;
1570 if (par->codec_id == AV_CODEC_ID_H264)
1571 return 0;
1572 if (atom.size == 16) {
1573 original_size = par->extradata_size;
1574 ret = mov_realloc_extradata(par, atom);
1575 if (!ret) {
1576 length = mov_read_atom_into_extradata(c, pb, atom, par, par->extradata + original_size);
1577 if (length == atom.size) {
1578 const uint8_t range_value = par->extradata[original_size + 19];
1579 switch (range_value) {
1580 case 1:
1581 par->color_range = AVCOL_RANGE_MPEG;
1582 break;
1583 case 2:
1584 par->color_range = AVCOL_RANGE_JPEG;
1585 break;
1586 default:
1587 av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
1588 break;
1589 }
1590 ff_dlog(c, "color_range: %d\n", par->color_range);
1591 } else {
1592 /* For some reason the whole atom was not added to the extradata */
1593 av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
1594 }
1595 } else {
1596 av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
1597 }
1598 } else {
1599 av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %"PRId64"\n", atom.size);
1600 }
1601 }
1602
1603 return ret;
1604}
1605
1606static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1607{
1608 return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
1609}
1610
1611static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1612{
1613 AVStream *st;
1614 int ret;
1615
1616 if (c->fc->nb_streams < 1)
1617 return 0;
1618 st = c->fc->streams[c->fc->nb_streams-1];
1619
1620 if ((uint64_t)atom.size > (1<<30))
1621 return AVERROR_INVALIDDATA;
1622
1623 if (st->codecpar->codec_id == AV_CODEC_ID_QDM2 ||
1624 st->codecpar->codec_id == AV_CODEC_ID_QDMC ||
1625 st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
1626 // pass all frma atom to codec, needed at least for QDMC and QDM2
1627 av_freep(&st->codecpar->extradata);
1628 ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1629 if (ret < 0)
1630 return ret;
1631 } else if (atom.size > 8) { /* to read frma, esds atoms */
1632 if (st->codecpar->codec_id == AV_CODEC_ID_ALAC && atom.size >= 24) {
1633 uint64_t buffer;
1634 ret = ffio_ensure_seekback(pb, 8);
1635 if (ret < 0)
1636 return ret;
1637 buffer = avio_rb64(pb);
1638 atom.size -= 8;
1639 if ( (buffer & 0xFFFFFFFF) == MKBETAG('f','r','m','a')
1640 && buffer >> 32 <= atom.size
1641 && buffer >> 32 >= 8) {
1642 avio_skip(pb, -8);
1643 atom.size += 8;
1644 } else if (!st->codecpar->extradata_size) {
1645#define ALAC_EXTRADATA_SIZE 36
1646 st->codecpar->extradata = av_mallocz(ALAC_EXTRADATA_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
1647 if (!st->codecpar->extradata)
1648 return AVERROR(ENOMEM);
1649 st->codecpar->extradata_size = ALAC_EXTRADATA_SIZE;
1650 AV_WB32(st->codecpar->extradata , ALAC_EXTRADATA_SIZE);
1651 AV_WB32(st->codecpar->extradata + 4, MKTAG('a','l','a','c'));
1652 AV_WB64(st->codecpar->extradata + 12, buffer);
1653 avio_read(pb, st->codecpar->extradata + 20, 16);
1654 avio_skip(pb, atom.size - 24);
1655 return 0;
1656 }
1657 }
1658 if ((ret = mov_read_default(c, pb, atom)) < 0)
1659 return ret;
1660 } else
1661 avio_skip(pb, atom.size);
1662 return 0;
1663}
1664
1665/**
1666 * This function reads atom content and puts data in extradata without tag
1667 * nor size unlike mov_read_extradata.
1668 */
1669static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1670{
1671 AVStream *st;
1672 int ret;
1673
1674 if (c->fc->nb_streams < 1)
1675 return 0;
1676 st = c->fc->streams[c->fc->nb_streams-1];
1677
1678 if ((uint64_t)atom.size > (1<<30))
1679 return AVERROR_INVALIDDATA;
1680
1681 if (atom.size >= 10) {
1682 // Broken files created by legacy versions of libavformat will
1683 // wrap a whole fiel atom inside of a glbl atom.
1684 unsigned size = avio_rb32(pb);
1685 unsigned type = avio_rl32(pb);
1686 avio_seek(pb, -8, SEEK_CUR);
1687 if (type == MKTAG('f','i','e','l') && size == atom.size)
1688 return mov_read_default(c, pb, atom);
1689 }
1690 if (st->codecpar->extradata_size > 1 && st->codecpar->extradata) {
1691 av_log(c, AV_LOG_WARNING, "ignoring multiple glbl\n");
1692 return 0;
1693 }
1694 av_freep(&st->codecpar->extradata);
1695 ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size);
1696 if (ret < 0)
1697 return ret;
1698
1699 return 0;
1700}
1701
1702static int mov_read_dvc1(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1703{
1704 AVStream *st;
1705 uint8_t profile_level;
1706 int ret;
1707
1708 if (c->fc->nb_streams < 1)
1709 return 0;
1710 st = c->fc->streams[c->fc->nb_streams-1];
1711
1712 if (atom.size >= (1<<28) || atom.size < 7)
1713 return AVERROR_INVALIDDATA;
1714
1715 profile_level = avio_r8(pb);
1716 if ((profile_level & 0xf0) != 0xc0)
1717 return 0;
1718
1719 avio_seek(pb, 6, SEEK_CUR);
1720 av_freep(&st->codecpar->extradata);
1721 ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 7);
1722 if (ret < 0)
1723 return ret;
1724
1725 return 0;
1726}
1727
1728/**
1729 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
1730 * but can have extradata appended at the end after the 40 bytes belonging
1731 * to the struct.
1732 */
1733static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1734{
1735 AVStream *st;
1736 int ret;
1737
1738 if (c->fc->nb_streams < 1)
1739 return 0;
1740 if (atom.size <= 40)
1741 return 0;
1742 st = c->fc->streams[c->fc->nb_streams-1];
1743
1744 if ((uint64_t)atom.size > (1<<30))
1745 return AVERROR_INVALIDDATA;
1746
1747 avio_skip(pb, 40);
1748 av_freep(&st->codecpar->extradata);
1749 ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 40);
1750 if (ret < 0)
1751 return ret;
1752
1753 return 0;
1754}
1755
1756static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1757{
1758 AVStream *st;
1759 MOVStreamContext *sc;
1760 unsigned int i, entries;
1761
1762 if (c->fc->nb_streams < 1)
1763 return 0;
1764 st = c->fc->streams[c->fc->nb_streams-1];
1765 sc = st->priv_data;
1766
1767 avio_r8(pb); /* version */
1768 avio_rb24(pb); /* flags */
1769
1770 entries = avio_rb32(pb);
1771
1772 if (!entries)
1773 return 0;
1774
1775 if (sc->chunk_offsets)
1776 av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n");
1777 av_free(sc->chunk_offsets);
1778 sc->chunk_count = 0;
1779 sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets));
1780 if (!sc->chunk_offsets)
1781 return AVERROR(ENOMEM);
1782 sc->chunk_count = entries;
1783
1784 if (atom.type == MKTAG('s','t','c','o'))
1785 for (i = 0; i < entries && !pb->eof_reached; i++)
1786 sc->chunk_offsets[i] = avio_rb32(pb);
1787 else if (atom.type == MKTAG('c','o','6','4'))
1788 for (i = 0; i < entries && !pb->eof_reached; i++)
1789 sc->chunk_offsets[i] = avio_rb64(pb);
1790 else
1791 return AVERROR_INVALIDDATA;
1792
1793 sc->chunk_count = i;
1794
1795 if (pb->eof_reached)
1796 return AVERROR_EOF;
1797
1798 return 0;
1799}
1800
1801/**
1802 * Compute codec id for 'lpcm' tag.
1803 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1804 */
1805enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
1806{
1807 /* lpcm flags:
1808 * 0x1 = float
1809 * 0x2 = big-endian
1810 * 0x4 = signed
1811 */
1812 return ff_get_pcm_codec_id(bps, flags & 1, flags & 2, flags & 4 ? -1 : 0);
1813}
1814
1815static int mov_codec_id(AVStream *st, uint32_t format)
1816{
1817 int id = ff_codec_get_id(ff_codec_movaudio_tags, format);
1818
1819 if (id <= 0 &&
1820 ((format & 0xFFFF) == 'm' + ('s' << 8) ||
1821 (format & 0xFFFF) == 'T' + ('S' << 8)))
1822 id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format) & 0xFFFF);
1823
1824 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
1825 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1826 } else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
1827 /* skip old ASF MPEG-4 tag */
1828 format && format != MKTAG('m','p','4','s')) {
1829 id = ff_codec_get_id(ff_codec_movvideo_tags, format);
1830 if (id <= 0)
1831 id = ff_codec_get_id(ff_codec_bmp_tags, format);
1832 if (id > 0)
1833 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1834 else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA ||
1835 (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1836 st->codecpar->codec_id == AV_CODEC_ID_NONE)) {
1837 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1838 if (id > 0)
1839 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1840 }
1841 }
1842
1843 st->codecpar->codec_tag = format;
1844
1845 return id;
1846}
1847
1848static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
1849 AVStream *st, MOVStreamContext *sc)
1850{
1851 uint8_t codec_name[32] = { 0 };
1852 int64_t stsd_start;
1853 unsigned int len;
1854
1855 /* The first 16 bytes of the video sample description are already
1856 * read in ff_mov_read_stsd_entries() */
1857 stsd_start = avio_tell(pb) - 16;
1858
1859 avio_rb16(pb); /* version */
1860 avio_rb16(pb); /* revision level */
1861 avio_rb32(pb); /* vendor */
1862 avio_rb32(pb); /* temporal quality */
1863 avio_rb32(pb); /* spatial quality */
1864
1865 st->codecpar->width = avio_rb16(pb); /* width */
1866 st->codecpar->height = avio_rb16(pb); /* height */
1867
1868 avio_rb32(pb); /* horiz resolution */
1869 avio_rb32(pb); /* vert resolution */
1870 avio_rb32(pb); /* data size, always 0 */
1871 avio_rb16(pb); /* frames per samples */
1872
1873 len = avio_r8(pb); /* codec name, pascal string */
1874 if (len > 31)
1875 len = 31;
1876 mov_read_mac_string(c, pb, len, codec_name, sizeof(codec_name));
1877 if (len < 31)
1878 avio_skip(pb, 31 - len);
1879
1880 if (codec_name[0])
1881 av_dict_set(&st->metadata, "encoder", codec_name, 0);
1882
1883 /* codec_tag YV12 triggers an UV swap in rawdec.c */
1884 if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) {
1885 st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
1886 st->codecpar->width &= ~1;
1887 st->codecpar->height &= ~1;
1888 }
1889 /* Flash Media Server uses tag H.263 with Sorenson Spark */
1890 if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
1891 !memcmp(codec_name, "Sorenson H263", 13))
1892 st->codecpar->codec_id = AV_CODEC_ID_FLV1;
1893
1894 st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* depth */
1895
1896 avio_seek(pb, stsd_start, SEEK_SET);
1897
1898 if (ff_get_qtpalette(st->codecpar->codec_id, pb, sc->palette)) {
1899 st->codecpar->bits_per_coded_sample &= 0x1F;
1900 sc->has_palette = 1;
1901 }
1902}
1903
1904static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
1905 AVStream *st, MOVStreamContext *sc)
1906{
1907 int bits_per_sample, flags;
1908 uint16_t version = avio_rb16(pb);
1909 AVDictionaryEntry *compatible_brands = av_dict_get(c->fc->metadata, "compatible_brands", NULL, AV_DICT_MATCH_CASE);
1910
1911 avio_rb16(pb); /* revision level */
1912 avio_rb32(pb); /* vendor */
1913
1914 st->codecpar->channels = avio_rb16(pb); /* channel count */
1915 st->codecpar->bits_per_coded_sample = avio_rb16(pb); /* sample size */
1916 av_log(c->fc, AV_LOG_TRACE, "audio channels %d\n", st->codecpar->channels);
1917
1918 sc->audio_cid = avio_rb16(pb);
1919 avio_rb16(pb); /* packet size = 0 */
1920
1921 st->codecpar->sample_rate = ((avio_rb32(pb) >> 16));
1922
1923 // Read QT version 1 fields. In version 0 these do not exist.
1924 av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
1925 if (!c->isom ||
1926 (compatible_brands && strstr(compatible_brands->value, "qt "))) {
1927
1928 if (version == 1) {
1929 sc->samples_per_frame = avio_rb32(pb);
1930 avio_rb32(pb); /* bytes per packet */
1931 sc->bytes_per_frame = avio_rb32(pb);
1932 avio_rb32(pb); /* bytes per sample */
1933 } else if (version == 2) {
1934 avio_rb32(pb); /* sizeof struct only */
1935 st->codecpar->sample_rate = av_int2double(avio_rb64(pb));
1936 st->codecpar->channels = avio_rb32(pb);
1937 avio_rb32(pb); /* always 0x7F000000 */
1938 st->codecpar->bits_per_coded_sample = avio_rb32(pb);
1939
1940 flags = avio_rb32(pb); /* lpcm format specific flag */
1941 sc->bytes_per_frame = avio_rb32(pb);
1942 sc->samples_per_frame = avio_rb32(pb);
1943 if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
1944 st->codecpar->codec_id =
1945 ff_mov_get_lpcm_codec_id(st->codecpar->bits_per_coded_sample,
1946 flags);
1947 }
1948 if (version == 0 || (version == 1 && sc->audio_cid != -2)) {
1949 /* can't correctly handle variable sized packet as audio unit */
1950 switch (st->codecpar->codec_id) {
1951 case AV_CODEC_ID_MP2:
1952 case AV_CODEC_ID_MP3:
1953 st->need_parsing = AVSTREAM_PARSE_FULL;
1954 break;
1955 }
1956 }
1957 }
1958
1959 if (sc->format == 0) {
1960 if (st->codecpar->bits_per_coded_sample == 8)
1961 st->codecpar->codec_id = mov_codec_id(st, MKTAG('r','a','w',' '));
1962 else if (st->codecpar->bits_per_coded_sample == 16)
1963 st->codecpar->codec_id = mov_codec_id(st, MKTAG('t','w','o','s'));
1964 }
1965
1966 switch (st->codecpar->codec_id) {
1967 case AV_CODEC_ID_PCM_S8:
1968 case AV_CODEC_ID_PCM_U8:
1969 if (st->codecpar->bits_per_coded_sample == 16)
1970 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
1971 break;
1972 case AV_CODEC_ID_PCM_S16LE:
1973 case AV_CODEC_ID_PCM_S16BE:
1974 if (st->codecpar->bits_per_coded_sample == 8)
1975 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
1976 else if (st->codecpar->bits_per_coded_sample == 24)
1977 st->codecpar->codec_id =
1978 st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE ?
1979 AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
1980 else if (st->codecpar->bits_per_coded_sample == 32)
1981 st->codecpar->codec_id =
1982 st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE ?
1983 AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
1984 break;
1985 /* set values for old format before stsd version 1 appeared */
1986 case AV_CODEC_ID_MACE3:
1987 sc->samples_per_frame = 6;
1988 sc->bytes_per_frame = 2 * st->codecpar->channels;
1989 break;
1990 case AV_CODEC_ID_MACE6:
1991 sc->samples_per_frame = 6;
1992 sc->bytes_per_frame = 1 * st->codecpar->channels;
1993 break;
1994 case AV_CODEC_ID_ADPCM_IMA_QT:
1995 sc->samples_per_frame = 64;
1996 sc->bytes_per_frame = 34 * st->codecpar->channels;
1997 break;
1998 case AV_CODEC_ID_GSM:
1999 sc->samples_per_frame = 160;
2000 sc->bytes_per_frame = 33;
2001 break;
2002 default:
2003 break;
2004 }
2005
2006 bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2007 if (bits_per_sample) {
2008 st->codecpar->bits_per_coded_sample = bits_per_sample;
2009 sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
2010 }
2011}
2012
2013static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
2014 AVStream *st, MOVStreamContext *sc,
2015 int64_t size)
2016{
2017 // ttxt stsd contains display flags, justification, background
2018 // color, fonts, and default styles, so fake an atom to read it
2019 MOVAtom fake_atom = { .size = size };
2020 // mp4s contains a regular esds atom
2021 if (st->codecpar->codec_tag != AV_RL32("mp4s"))
2022 mov_read_glbl(c, pb, fake_atom);
2023 st->codecpar->width = sc->width;
2024 st->codecpar->height = sc->height;
2025}
2026
2027static uint32_t yuv_to_rgba(uint32_t ycbcr)
2028{
2029 uint8_t r, g, b;
2030 int y, cb, cr;
2031
2032 y = (ycbcr >> 16) & 0xFF;
2033 cr = (ycbcr >> 8) & 0xFF;
2034 cb = ycbcr & 0xFF;
2035
2036 b = av_clip_uint8((1164 * (y - 16) + 2018 * (cb - 128)) / 1000);
2037 g = av_clip_uint8((1164 * (y - 16) - 813 * (cr - 128) - 391 * (cb - 128)) / 1000);
2038 r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128) ) / 1000);
2039
2040 return (r << 16) | (g << 8) | b;
2041}
2042
2043static int mov_rewrite_dvd_sub_extradata(AVStream *st)
2044{
2045 char buf[256] = {0};
2046 uint8_t *src = st->codecpar->extradata;
2047 int i;
2048
2049 if (st->codecpar->extradata_size != 64)
2050 return 0;
2051
2052 if (st->codecpar->width > 0 && st->codecpar->height > 0)
2053 snprintf(buf, sizeof(buf), "size: %dx%d\n",
2054 st->codecpar->width, st->codecpar->height);
2055 av_strlcat(buf, "palette: ", sizeof(buf));
2056
2057 for (i = 0; i < 16; i++) {
2058 uint32_t yuv = AV_RB32(src + i * 4);
2059 uint32_t rgba = yuv_to_rgba(yuv);
2060
2061 av_strlcatf(buf, sizeof(buf), "%06"PRIx32"%s", rgba, i != 15 ? ", " : "");
2062 }
2063
2064 if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
2065 return 0;
2066
2067 av_freep(&st->codecpar->extradata);
2068 st->codecpar->extradata_size = 0;
2069 st->codecpar->extradata = av_mallocz(strlen(buf) + AV_INPUT_BUFFER_PADDING_SIZE);
2070 if (!st->codecpar->extradata)
2071 return AVERROR(ENOMEM);
2072 st->codecpar->extradata_size = strlen(buf);
2073 memcpy(st->codecpar->extradata, buf, st->codecpar->extradata_size);
2074
2075 return 0;
2076}
2077
2078static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
2079 AVStream *st, MOVStreamContext *sc,
2080 int64_t size)
2081{
2082 int ret;
2083
2084 if (st->codecpar->codec_tag == MKTAG('t','m','c','d')) {
2085 if ((int)size != size)
2086 return AVERROR(ENOMEM);
2087
2088 ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
2089 if (ret < 0)
2090 return ret;
2091 if (size > 16) {
2092 MOVStreamContext *tmcd_ctx = st->priv_data;
2093 int val;
2094 val = AV_RB32(st->codecpar->extradata + 4);
2095 tmcd_ctx->tmcd_flags = val;
2096 st->avg_frame_rate.num = st->codecpar->extradata[16]; /* number of frame */
2097 st->avg_frame_rate.den = 1;
2098#if FF_API_LAVF_AVCTX
2099FF_DISABLE_DEPRECATION_WARNINGS
2100 st->codec->time_base = av_inv_q(st->avg_frame_rate);
2101FF_ENABLE_DEPRECATION_WARNINGS
2102#endif
2103 /* adjust for per frame dur in counter mode */
2104 if (tmcd_ctx->tmcd_flags & 0x0008) {
2105 int timescale = AV_RB32(st->codecpar->extradata + 8);
2106 int framedur = AV_RB32(st->codecpar->extradata + 12);
2107 st->avg_frame_rate.num *= timescale;
2108 st->avg_frame_rate.den *= framedur;
2109#if FF_API_LAVF_AVCTX
2110FF_DISABLE_DEPRECATION_WARNINGS
2111 st->codec->time_base.den *= timescale;
2112 st->codec->time_base.num *= framedur;
2113FF_ENABLE_DEPRECATION_WARNINGS
2114#endif
2115 }
2116 if (size > 30) {
2117 uint32_t len = AV_RB32(st->codecpar->extradata + 18); /* name atom length */
2118 uint32_t format = AV_RB32(st->codecpar->extradata + 22);
2119 if (format == AV_RB32("name") && (int64_t)size >= (int64_t)len + 18) {
2120 uint16_t str_size = AV_RB16(st->codecpar->extradata + 26); /* string length */
2121 if (str_size > 0 && size >= (int)str_size + 26) {
2122 char *reel_name = av_malloc(str_size + 1);
2123 if (!reel_name)
2124 return AVERROR(ENOMEM);
2125 memcpy(reel_name, st->codecpar->extradata + 30, str_size);
2126 reel_name[str_size] = 0; /* Add null terminator */
2127 /* don't add reel_name if emtpy string */
2128 if (*reel_name == 0) {
2129 av_free(reel_name);
2130 } else {
2131 av_dict_set(&st->metadata, "reel_name", reel_name, AV_DICT_DONT_STRDUP_VAL);
2132 }
2133 }
2134 }
2135 }
2136 }
2137 } else {
2138 /* other codec type, just skip (rtp, mp4s ...) */
2139 avio_skip(pb, size);
2140 }
2141 return 0;
2142}
2143
2144static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
2145 AVStream *st, MOVStreamContext *sc)
2146{
2147 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
2148 !st->codecpar->sample_rate && sc->time_scale > 1)
2149 st->codecpar->sample_rate = sc->time_scale;
2150
2151 /* special codec parameters handling */
2152 switch (st->codecpar->codec_id) {
2153#if CONFIG_DV_DEMUXER
2154 case AV_CODEC_ID_DVAUDIO:
2155 c->dv_fctx = avformat_alloc_context();
2156 if (!c->dv_fctx) {
2157 av_log(c->fc, AV_LOG_ERROR, "dv demux context alloc error\n");
2158 return AVERROR(ENOMEM);
2159 }
2160 c->dv_demux = avpriv_dv_init_demux(c->dv_fctx);
2161 if (!c->dv_demux) {
2162 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
2163 return AVERROR(ENOMEM);
2164 }
2165 sc->dv_audio_container = 1;
2166 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
2167 break;
2168#endif
2169 /* no ifdef since parameters are always those */
2170 case AV_CODEC_ID_QCELP:
2171 st->codecpar->channels = 1;
2172 // force sample rate for qcelp when not stored in mov
2173 if (st->codecpar->codec_tag != MKTAG('Q','c','l','p'))
2174 st->codecpar->sample_rate = 8000;
2175 // FIXME: Why is the following needed for some files?
2176 sc->samples_per_frame = 160;
2177 if (!sc->bytes_per_frame)
2178 sc->bytes_per_frame = 35;
2179 break;
2180 case AV_CODEC_ID_AMR_NB:
2181 st->codecpar->channels = 1;
2182 /* force sample rate for amr, stsd in 3gp does not store sample rate */
2183 st->codecpar->sample_rate = 8000;
2184 break;
2185 case AV_CODEC_ID_AMR_WB:
2186 st->codecpar->channels = 1;
2187 st->codecpar->sample_rate = 16000;
2188 break;
2189 case AV_CODEC_ID_MP2:
2190 case AV_CODEC_ID_MP3:
2191 /* force type after stsd for m1a hdlr */
2192 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2193 break;
2194 case AV_CODEC_ID_GSM:
2195 case AV_CODEC_ID_ADPCM_MS:
2196 case AV_CODEC_ID_ADPCM_IMA_WAV:
2197 case AV_CODEC_ID_ILBC:
2198 case AV_CODEC_ID_MACE3:
2199 case AV_CODEC_ID_MACE6:
2200 case AV_CODEC_ID_QDM2:
2201 st->codecpar->block_align = sc->bytes_per_frame;
2202 break;
2203 case AV_CODEC_ID_ALAC:
2204 if (st->codecpar->extradata_size == 36) {
2205 st->codecpar->channels = AV_RB8 (st->codecpar->extradata + 21);
2206 st->codecpar->sample_rate = AV_RB32(st->codecpar->extradata + 32);
2207 }
2208 break;
2209 case AV_CODEC_ID_AC3:
2210 case AV_CODEC_ID_EAC3:
2211 case AV_CODEC_ID_MPEG1VIDEO:
2212 case AV_CODEC_ID_VC1:
2213 case AV_CODEC_ID_VP9:
2214 st->need_parsing = AVSTREAM_PARSE_FULL;
2215 break;
2216 default:
2217 break;
2218 }
2219 return 0;
2220}
2221
2222static int mov_skip_multiple_stsd(MOVContext *c, AVIOContext *pb,
2223 int codec_tag, int format,
2224 int64_t size)
2225{
2226 int video_codec_id = ff_codec_get_id(ff_codec_movvideo_tags, format);
2227
2228 if (codec_tag &&
2229 (codec_tag != format &&
2230 // AVID 1:1 samples with differing data format and codec tag exist
2231 (codec_tag != AV_RL32("AV1x") || format != AV_RL32("AVup")) &&
2232 // prores is allowed to have differing data format and codec tag
2233 codec_tag != AV_RL32("apcn") && codec_tag != AV_RL32("apch") &&
2234 // so is dv (sigh)
2235 codec_tag != AV_RL32("dvpp") && codec_tag != AV_RL32("dvcp") &&
2236 (c->fc->video_codec_id ? video_codec_id != c->fc->video_codec_id
2237 : codec_tag != MKTAG('j','p','e','g')))) {
2238 /* Multiple fourcc, we skip JPEG. This is not correct, we should
2239 * export it as a separate AVStream but this needs a few changes
2240 * in the MOV demuxer, patch welcome. */
2241
2242 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
2243 avio_skip(pb, size);
2244 return 1;
2245 }
2246
2247 return 0;
2248}
2249
2250int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
2251{
2252 AVStream *st;
2253 MOVStreamContext *sc;
2254 int pseudo_stream_id;
2255
2256 if (c->fc->nb_streams < 1)
2257 return 0;
2258 st = c->fc->streams[c->fc->nb_streams-1];
2259 sc = st->priv_data;
2260
2261 for (pseudo_stream_id = 0;
2262 pseudo_stream_id < entries && !pb->eof_reached;
2263 pseudo_stream_id++) {
2264 //Parsing Sample description table
2265 enum AVCodecID id;
2266 int ret, dref_id = 1;
2267 MOVAtom a = { AV_RL32("stsd") };
2268 int64_t start_pos = avio_tell(pb);
2269 int64_t size = avio_rb32(pb); /* size */
2270 uint32_t format = avio_rl32(pb); /* data format */
2271
2272 if (size >= 16) {
2273 avio_rb32(pb); /* reserved */
2274 avio_rb16(pb); /* reserved */
2275 dref_id = avio_rb16(pb);
2276 } else if (size <= 7) {
2277 av_log(c->fc, AV_LOG_ERROR,
2278 "invalid size %"PRId64" in stsd\n", size);
2279 return AVERROR_INVALIDDATA;
2280 }
2281
2282 if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
2283 size - (avio_tell(pb) - start_pos)))
2284 continue;
2285
2286 sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
2287 sc->dref_id= dref_id;
2288 sc->format = format;
2289
2290 id = mov_codec_id(st, format);
2291
2292 av_log(c->fc, AV_LOG_TRACE,
2293 "size=%"PRId64" 4CC=%s codec_type=%d\n", size,
2294 av_fourcc2str(format), st->codecpar->codec_type);
2295
2296 if (st->codecpar->codec_type==AVMEDIA_TYPE_VIDEO) {
2297 st->codecpar->codec_id = id;
2298 mov_parse_stsd_video(c, pb, st, sc);
2299 } else if (st->codecpar->codec_type==AVMEDIA_TYPE_AUDIO) {
2300 st->codecpar->codec_id = id;
2301 mov_parse_stsd_audio(c, pb, st, sc);
2302 if (st->codecpar->sample_rate < 0) {
2303 av_log(c->fc, AV_LOG_ERROR, "Invalid sample rate %d\n", st->codecpar->sample_rate);
2304 return AVERROR_INVALIDDATA;
2305 }
2306 } else if (st->codecpar->codec_type==AVMEDIA_TYPE_SUBTITLE){
2307 st->codecpar->codec_id = id;
2308 mov_parse_stsd_subtitle(c, pb, st, sc,
2309 size - (avio_tell(pb) - start_pos));
2310 } else {
2311 ret = mov_parse_stsd_data(c, pb, st, sc,
2312 size - (avio_tell(pb) - start_pos));
2313 if (ret < 0)
2314 return ret;
2315 }
2316 /* this will read extra atoms at the end (wave, alac, damr, avcC, hvcC, SMI ...) */
2317 a.size = size - (avio_tell(pb) - start_pos);
2318 if (a.size > 8) {
2319 if ((ret = mov_read_default(c, pb, a)) < 0)
2320 return ret;
2321 } else if (a.size > 0)
2322 avio_skip(pb, a.size);
2323
2324 if (sc->extradata) {
2325 int extra_size = st->codecpar->extradata_size;
2326
2327 /* Move the current stream extradata to the stream context one. */
2328 sc->extradata_size[pseudo_stream_id] = extra_size;
2329 sc->extradata[pseudo_stream_id] = av_malloc(extra_size + AV_INPUT_BUFFER_PADDING_SIZE);
2330 if (!sc->extradata[pseudo_stream_id])
2331 return AVERROR(ENOMEM);
2332 memcpy(sc->extradata[pseudo_stream_id], st->codecpar->extradata, extra_size);
2333 av_freep(&st->codecpar->extradata);
2334 st->codecpar->extradata_size = 0;
2335 }
2336 }
2337
2338 if (pb->eof_reached)
2339 return AVERROR_EOF;
2340
2341 return 0;
2342}
2343
2344static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2345{
2346 AVStream *st;
2347 MOVStreamContext *sc;
2348 int ret, entries;
2349
2350 if (c->fc->nb_streams < 1)
2351 return 0;
2352 st = c->fc->streams[c->fc->nb_streams - 1];
2353 sc = st->priv_data;
2354
2355 avio_r8(pb); /* version */
2356 avio_rb24(pb); /* flags */
2357 entries = avio_rb32(pb);
2358
2359 if (entries <= 0) {
2360 av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries);
2361 return AVERROR_INVALIDDATA;
2362 }
2363
2364 if (sc->extradata) {
2365 av_log(c->fc, AV_LOG_ERROR, "Duplicate STSD\n");
2366 return AVERROR_INVALIDDATA;
2367 }
2368 /* Prepare space for hosting multiple extradata. */
2369 sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
2370 sc->extradata_size = av_mallocz_array(entries, sizeof(*sc->extradata_size));
2371 if (!sc->extradata_size || !sc->extradata) {
2372 ret = AVERROR(ENOMEM);
2373 goto fail;
2374 }
2375
2376 ret = ff_mov_read_stsd_entries(c, pb, entries);
2377 if (ret < 0)
2378 return ret;
2379
2380 sc->stsd_count = entries;
2381
2382 /* Restore back the primary extradata. */
2383 av_freep(&st->codecpar->extradata);
2384 st->codecpar->extradata_size = sc->extradata_size[0];
2385 if (sc->extradata_size[0]) {
2386 st->codecpar->extradata = av_mallocz(sc->extradata_size[0] + AV_INPUT_BUFFER_PADDING_SIZE);
2387 if (!st->codecpar->extradata)
2388 return AVERROR(ENOMEM);
2389 memcpy(st->codecpar->extradata, sc->extradata[0], sc->extradata_size[0]);
2390 }
2391
2392 return mov_finalize_stsd_codec(c, pb, st, sc);
2393fail:
2394 av_freep(&sc->extradata);
2395 av_freep(&sc->extradata_size);
2396 return ret;
2397}
2398
2399static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2400{
2401 AVStream *st;
2402 MOVStreamContext *sc;
2403 unsigned int i, entries;
2404
2405 if (c->fc->nb_streams < 1)
2406 return 0;
2407 st = c->fc->streams[c->fc->nb_streams-1];
2408 sc = st->priv_data;
2409
2410 avio_r8(pb); /* version */
2411 avio_rb24(pb); /* flags */
2412
2413 entries = avio_rb32(pb);
2414
2415 av_log(c->fc, AV_LOG_TRACE, "track[%u].stsc.entries = %u\n", c->fc->nb_streams - 1, entries);
2416
2417 if (!entries)
2418 return 0;
2419 if (sc->stsc_data)
2420 av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n");
2421 av_free(sc->stsc_data);
2422 sc->stsc_count = 0;
2423 sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));
2424 if (!sc->stsc_data)
2425 return AVERROR(ENOMEM);
2426
2427 for (i = 0; i < entries && !pb->eof_reached; i++) {
2428 sc->stsc_data[i].first = avio_rb32(pb);
2429 sc->stsc_data[i].count = avio_rb32(pb);
2430 sc->stsc_data[i].id = avio_rb32(pb);
2431 }
2432
2433 sc->stsc_count = i;
2434
2435 if (pb->eof_reached)
2436 return AVERROR_EOF;
2437
2438 return 0;
2439}
2440
2441#define mov_stsc_index_valid(index, count) ((index) < (count) - 1)
2442
2443/* Compute the samples value for the stsc entry at the given index. */
2444static inline int mov_get_stsc_samples(MOVStreamContext *sc, int index)
2445{
2446 int chunk_count;
2447
2448 if (mov_stsc_index_valid(index, sc->stsc_count))
2449 chunk_count = sc->stsc_data[index + 1].first - sc->stsc_data[index].first;
2450 else
2451 chunk_count = sc->chunk_count - (sc->stsc_data[index].first - 1);
2452
2453 return sc->stsc_data[index].count * chunk_count;
2454}
2455
2456static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2457{
2458 AVStream *st;
2459 MOVStreamContext *sc;
2460 unsigned i, entries;
2461
2462 if (c->fc->nb_streams < 1)
2463 return 0;
2464 st = c->fc->streams[c->fc->nb_streams-1];
2465 sc = st->priv_data;
2466
2467 avio_rb32(pb); // version + flags
2468
2469 entries = avio_rb32(pb);
2470 if (sc->stps_data)
2471 av_log(c->fc, AV_LOG_WARNING, "Duplicated STPS atom\n");
2472 av_free(sc->stps_data);
2473 sc->stps_count = 0;
2474 sc->stps_data = av_malloc_array(entries, sizeof(*sc->stps_data));
2475 if (!sc->stps_data)
2476 return AVERROR(ENOMEM);
2477
2478 for (i = 0; i < entries && !pb->eof_reached; i++) {
2479 sc->stps_data[i] = avio_rb32(pb);
2480 }
2481
2482 sc->stps_count = i;
2483
2484 if (pb->eof_reached)
2485 return AVERROR_EOF;
2486
2487 return 0;
2488}
2489
2490static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2491{
2492 AVStream *st;
2493 MOVStreamContext *sc;
2494 unsigned int i, entries;
2495
2496 if (c->fc->nb_streams < 1)
2497 return 0;
2498 st = c->fc->streams[c->fc->nb_streams-1];
2499 sc = st->priv_data;
2500
2501 avio_r8(pb); /* version */
2502 avio_rb24(pb); /* flags */
2503
2504 entries = avio_rb32(pb);
2505
2506 av_log(c->fc, AV_LOG_TRACE, "keyframe_count = %u\n", entries);
2507
2508 if (!entries)
2509 {
2510 sc->keyframe_absent = 1;
2511 if (!st->need_parsing && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
2512 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2513 return 0;
2514 }
2515 if (sc->keyframes)
2516 av_log(c->fc, AV_LOG_WARNING, "Duplicated STSS atom\n");
2517 if (entries >= UINT_MAX / sizeof(int))
2518 return AVERROR_INVALIDDATA;
2519 av_freep(&sc->keyframes);
2520 sc->keyframe_count = 0;
2521 sc->keyframes = av_malloc_array(entries, sizeof(*sc->keyframes));
2522 if (!sc->keyframes)
2523 return AVERROR(ENOMEM);
2524
2525 for (i = 0; i < entries && !pb->eof_reached; i++) {
2526 sc->keyframes[i] = avio_rb32(pb);
2527 }
2528
2529 sc->keyframe_count = i;
2530
2531 if (pb->eof_reached)
2532 return AVERROR_EOF;
2533
2534 return 0;
2535}
2536
2537static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2538{
2539 AVStream *st;
2540 MOVStreamContext *sc;
2541 unsigned int i, entries, sample_size, field_size, num_bytes;
2542 GetBitContext gb;
2543 unsigned char* buf;
2544 int ret;
2545
2546 if (c->fc->nb_streams < 1)
2547 return 0;
2548 st = c->fc->streams[c->fc->nb_streams-1];
2549 sc = st->priv_data;
2550
2551 avio_r8(pb); /* version */
2552 avio_rb24(pb); /* flags */
2553
2554 if (atom.type == MKTAG('s','t','s','z')) {
2555 sample_size = avio_rb32(pb);
2556 if (!sc->sample_size) /* do not overwrite value computed in stsd */
2557 sc->sample_size = sample_size;
2558 sc->stsz_sample_size = sample_size;
2559 field_size = 32;
2560 } else {
2561 sample_size = 0;
2562 avio_rb24(pb); /* reserved */
2563 field_size = avio_r8(pb);
2564 }
2565 entries = avio_rb32(pb);
2566
2567 av_log(c->fc, AV_LOG_TRACE, "sample_size = %u sample_count = %u\n", sc->sample_size, entries);
2568
2569 sc->sample_count = entries;
2570 if (sample_size)
2571 return 0;
2572
2573 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
2574 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %u\n", field_size);
2575 return AVERROR_INVALIDDATA;
2576 }
2577
2578 if (!entries)
2579 return 0;
2580 if (entries >= (UINT_MAX - 4) / field_size)
2581 return AVERROR_INVALIDDATA;
2582 if (sc->sample_sizes)
2583 av_log(c->fc, AV_LOG_WARNING, "Duplicated STSZ atom\n");
2584 av_free(sc->sample_sizes);
2585 sc->sample_count = 0;
2586 sc->sample_sizes = av_malloc_array(entries, sizeof(*sc->sample_sizes));
2587 if (!sc->sample_sizes)
2588 return AVERROR(ENOMEM);
2589
2590 num_bytes = (entries*field_size+4)>>3;
2591
2592 buf = av_malloc(num_bytes+AV_INPUT_BUFFER_PADDING_SIZE);
2593 if (!buf) {
2594 av_freep(&sc->sample_sizes);
2595 return AVERROR(ENOMEM);
2596 }
2597
2598 ret = ffio_read_size(pb, buf, num_bytes);
2599 if (ret < 0) {
2600 av_freep(&sc->sample_sizes);
2601 av_free(buf);
2602 return ret;
2603 }
2604
2605 init_get_bits(&gb, buf, 8*num_bytes);
2606
2607 for (i = 0; i < entries && !pb->eof_reached; i++) {
2608 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
2609 sc->data_size += sc->sample_sizes[i];
2610 }
2611
2612 sc->sample_count = i;
2613
2614 av_free(buf);
2615
2616 if (pb->eof_reached)
2617 return AVERROR_EOF;
2618
2619 return 0;
2620}
2621
2622static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2623{
2624 AVStream *st;
2625 MOVStreamContext *sc;
2626 unsigned int i, entries;
2627 int64_t duration=0;
2628 int64_t total_sample_count=0;
2629
2630 if (c->fc->nb_streams < 1)
2631 return 0;
2632 st = c->fc->streams[c->fc->nb_streams-1];
2633 sc = st->priv_data;
2634
2635 avio_r8(pb); /* version */
2636 avio_rb24(pb); /* flags */
2637 entries = avio_rb32(pb);
2638
2639 av_log(c->fc, AV_LOG_TRACE, "track[%u].stts.entries = %u\n",
2640 c->fc->nb_streams-1, entries);
2641
2642 if (sc->stts_data)
2643 av_log(c->fc, AV_LOG_WARNING, "Duplicated STTS atom\n");
2644 av_free(sc->stts_data);
2645 sc->stts_count = 0;
2646 sc->stts_data = av_malloc_array(entries, sizeof(*sc->stts_data));
2647 if (!sc->stts_data)
2648 return AVERROR(ENOMEM);
2649
2650 for (i = 0; i < entries && !pb->eof_reached; i++) {
2651 int sample_duration;
2652 int sample_count;
2653
2654 sample_count=avio_rb32(pb);
2655 sample_duration = avio_rb32(pb);
2656
2657 if (sample_count < 0) {
2658 av_log(c->fc, AV_LOG_ERROR, "Invalid sample_count=%d\n", sample_count);
2659 return AVERROR_INVALIDDATA;
2660 }
2661 sc->stts_data[i].count= sample_count;
2662 sc->stts_data[i].duration= sample_duration;
2663
2664 av_log(c->fc, AV_LOG_TRACE, "sample_count=%d, sample_duration=%d\n",
2665 sample_count, sample_duration);
2666
2667 if ( i+1 == entries
2668 && i
2669 && sample_count == 1
2670 && total_sample_count > 100
2671 && sample_duration/10 > duration / total_sample_count)
2672 sample_duration = duration / total_sample_count;
2673 duration+=(int64_t)sample_duration*sample_count;
2674 total_sample_count+=sample_count;
2675 }
2676
2677 sc->stts_count = i;
2678
2679 sc->duration_for_fps += duration;
2680 sc->nb_frames_for_fps += total_sample_count;
2681
2682 if (pb->eof_reached)
2683 return AVERROR_EOF;
2684
2685 st->nb_frames= total_sample_count;
2686 if (duration)
2687 st->duration= duration;
2688 sc->track_end = duration;
2689 return 0;
2690}
2691
2692static void mov_update_dts_shift(MOVStreamContext *sc, int duration)
2693{
2694 if (duration < 0) {
2695 if (duration == INT_MIN) {
2696 av_log(NULL, AV_LOG_WARNING, "mov_update_dts_shift(): dts_shift set to %d\n", INT_MAX);
2697 duration++;
2698 }
2699 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
2700 }
2701}
2702
2703static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2704{
2705 AVStream *st;
2706 MOVStreamContext *sc;
2707 unsigned int i, entries, ctts_count = 0;
2708
2709 if (c->fc->nb_streams < 1)
2710 return 0;
2711 st = c->fc->streams[c->fc->nb_streams-1];
2712 sc = st->priv_data;
2713
2714 avio_r8(pb); /* version */
2715 avio_rb24(pb); /* flags */
2716 entries = avio_rb32(pb);
2717
2718 av_log(c->fc, AV_LOG_TRACE, "track[%u].ctts.entries = %u\n", c->fc->nb_streams - 1, entries);
2719
2720 if (!entries)
2721 return 0;
2722 if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
2723 return AVERROR_INVALIDDATA;
2724 av_freep(&sc->ctts_data);
2725 sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
2726 if (!sc->ctts_data)
2727 return AVERROR(ENOMEM);
2728
2729 for (i = 0; i < entries && !pb->eof_reached; i++) {
2730 int count =avio_rb32(pb);
2731 int duration =avio_rb32(pb);
2732
2733 if (count <= 0) {
2734 av_log(c->fc, AV_LOG_TRACE,
2735 "ignoring CTTS entry with count=%d duration=%d\n",
2736 count, duration);
2737 continue;
2738 }
2739
2740 sc->ctts_data[ctts_count].count = count;
2741 sc->ctts_data[ctts_count].duration = duration;
2742 ctts_count++;
2743
2744 av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
2745 count, duration);
2746
2747 if (FFNABS(duration) < -(1<<28) && i+2<entries) {
2748 av_log(c->fc, AV_LOG_WARNING, "CTTS invalid\n");
2749 av_freep(&sc->ctts_data);
2750 sc->ctts_count = 0;
2751 return 0;
2752 }
2753
2754 if (i+2<entries)
2755 mov_update_dts_shift(sc, duration);
2756 }
2757
2758 sc->ctts_count = ctts_count;
2759
2760 if (pb->eof_reached)
2761 return AVERROR_EOF;
2762
2763 av_log(c->fc, AV_LOG_TRACE, "dts shift %d\n", sc->dts_shift);
2764
2765 return 0;
2766}
2767
2768static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2769{
2770 AVStream *st;
2771 MOVStreamContext *sc;
2772 unsigned int i, entries;
2773 uint8_t version;
2774 uint32_t grouping_type;
2775
2776 if (c->fc->nb_streams < 1)
2777 return 0;
2778 st = c->fc->streams[c->fc->nb_streams-1];
2779 sc = st->priv_data;
2780
2781 version = avio_r8(pb); /* version */
2782 avio_rb24(pb); /* flags */
2783 grouping_type = avio_rl32(pb);
2784 if (grouping_type != MKTAG( 'r','a','p',' '))
2785 return 0; /* only support 'rap ' grouping */
2786 if (version == 1)
2787 avio_rb32(pb); /* grouping_type_parameter */
2788
2789 entries = avio_rb32(pb);
2790 if (!entries)
2791 return 0;
2792 if (sc->rap_group)
2793 av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
2794 av_free(sc->rap_group);
2795 sc->rap_group_count = 0;
2796 sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
2797 if (!sc->rap_group)
2798 return AVERROR(ENOMEM);
2799
2800 for (i = 0; i < entries && !pb->eof_reached; i++) {
2801 sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
2802 sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
2803 }
2804
2805 sc->rap_group_count = i;
2806
2807 return pb->eof_reached ? AVERROR_EOF : 0;
2808}
2809
2810/**
2811 * Get ith edit list entry (media time, duration).
2812 */
2813static int get_edit_list_entry(MOVContext *mov,
2814 const MOVStreamContext *msc,
2815 unsigned int edit_list_index,
2816 int64_t *edit_list_media_time,
2817 int64_t *edit_list_duration,
2818 int64_t global_timescale)
2819{
2820 if (edit_list_index == msc->elst_count) {
2821 return 0;
2822 }
2823 *edit_list_media_time = msc->elst_data[edit_list_index].time;
2824 *edit_list_duration = msc->elst_data[edit_list_index].duration;
2825
2826 /* duration is in global timescale units;convert to msc timescale */
2827 if (global_timescale == 0) {
2828 avpriv_request_sample(mov->fc, "Support for mvhd.timescale = 0 with editlists");
2829 return 0;
2830 }
2831 *edit_list_duration = av_rescale(*edit_list_duration, msc->time_scale,
2832 global_timescale);
2833 return 1;
2834}
2835
2836/**
2837 * Find the closest previous frame to the timestamp, in e_old index
2838 * entries. Searching for just any frame / just key frames can be controlled by
2839 * last argument 'flag'.
2840 * Returns the index of the entry in st->index_entries if successful,
2841 * else returns -1.
2842 */
2843static int64_t find_prev_closest_index(AVStream *st,
2844 AVIndexEntry *e_old,
2845 int nb_old,
2846 int64_t timestamp,
2847 int flag)
2848{
2849 AVIndexEntry *e_keep = st->index_entries;
2850 int nb_keep = st->nb_index_entries;
2851 int64_t found = -1;
2852 int64_t i = 0;
2853
2854 st->index_entries = e_old;
2855 st->nb_index_entries = nb_old;
2856 found = av_index_search_timestamp(st, timestamp, flag | AVSEEK_FLAG_BACKWARD);
2857
2858 // Keep going backwards in the index entries until the timestamp is the same.
2859 if (found >= 0) {
2860 for (i = found; i > 0 && e_old[i].timestamp == e_old[i - 1].timestamp;
2861 i--) {
2862 if ((flag & AVSEEK_FLAG_ANY) ||
2863 (e_old[i - 1].flags & AVINDEX_KEYFRAME)) {
2864 found = i - 1;
2865 }
2866 }
2867 }
2868
2869 /* restore AVStream state*/
2870 st->index_entries = e_keep;
2871 st->nb_index_entries = nb_keep;
2872 return found;
2873}
2874
2875/**
2876 * Add index entry with the given values, to the end of st->index_entries.
2877 * Returns the new size st->index_entries if successful, else returns -1.
2878 *
2879 * This function is similar to ff_add_index_entry in libavformat/utils.c
2880 * except that here we are always unconditionally adding an index entry to
2881 * the end, instead of searching the entries list and skipping the add if
2882 * there is an existing entry with the same timestamp.
2883 * This is needed because the mov_fix_index calls this func with the same
2884 * unincremented timestamp for successive discarded frames.
2885 */
2886static int64_t add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2887 int size, int distance, int flags)
2888{
2889 AVIndexEntry *entries, *ie;
2890 int64_t index = -1;
2891 const size_t min_size_needed = (st->nb_index_entries + 1) * sizeof(AVIndexEntry);
2892
2893 // Double the allocation each time, to lower memory fragmentation.
2894 // Another difference from ff_add_index_entry function.
2895 const size_t requested_size =
2896 min_size_needed > st->index_entries_allocated_size ?
2897 FFMAX(min_size_needed, 2 * st->index_entries_allocated_size) :
2898 min_size_needed;
2899
2900 if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
2901 return -1;
2902
2903 entries = av_fast_realloc(st->index_entries,
2904 &st->index_entries_allocated_size,
2905 requested_size);
2906 if(!entries)
2907 return -1;
2908
2909 st->index_entries= entries;
2910
2911 index= st->nb_index_entries++;
2912 ie= &entries[index];
2913
2914 ie->pos = pos;
2915 ie->timestamp = timestamp;
2916 ie->min_distance= distance;
2917 ie->size= size;
2918 ie->flags = flags;
2919 return index;
2920}
2921
2922/**
2923 * Rewrite timestamps of index entries in the range [end_index - frame_duration_buffer_size, end_index)
2924 * by subtracting end_ts successively by the amounts given in frame_duration_buffer.
2925 */
2926static void fix_index_entry_timestamps(AVStream* st, int end_index, int64_t end_ts,
2927 int64_t* frame_duration_buffer,
2928 int frame_duration_buffer_size) {
2929 int i = 0;
2930 av_assert0(end_index >= 0 && end_index <= st->nb_index_entries);
2931 for (i = 0; i < frame_duration_buffer_size; i++) {
2932 end_ts -= frame_duration_buffer[frame_duration_buffer_size - 1 - i];
2933 st->index_entries[end_index - 1 - i].timestamp = end_ts;
2934 }
2935}
2936
2937/**
2938 * Append a new ctts entry to ctts_data.
2939 * Returns the new ctts_count if successful, else returns -1.
2940 */
2941static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
2942 int count, int duration)
2943{
2944 MOVStts *ctts_buf_new;
2945 const size_t min_size_needed = (*ctts_count + 1) * sizeof(MOVStts);
2946 const size_t requested_size =
2947 min_size_needed > *allocated_size ?
2948 FFMAX(min_size_needed, 2 * (*allocated_size)) :
2949 min_size_needed;
2950
2951 if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
2952 return -1;
2953
2954 ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);
2955
2956 if(!ctts_buf_new)
2957 return -1;
2958
2959 *ctts_data = ctts_buf_new;
2960
2961 ctts_buf_new[*ctts_count].count = count;
2962 ctts_buf_new[*ctts_count].duration = duration;
2963
2964 *ctts_count = (*ctts_count) + 1;
2965 return *ctts_count;
2966}
2967
2968static void mov_current_sample_inc(MOVStreamContext *sc)
2969{
2970 sc->current_sample++;
2971 sc->current_index++;
2972 if (sc->index_ranges &&
2973 sc->current_index >= sc->current_index_range->end &&
2974 sc->current_index_range->end) {
2975 sc->current_index_range++;
2976 sc->current_index = sc->current_index_range->start;
2977 }
2978}
2979
2980static void mov_current_sample_dec(MOVStreamContext *sc)
2981{
2982 sc->current_sample--;
2983 sc->current_index--;
2984 if (sc->index_ranges &&
2985 sc->current_index < sc->current_index_range->start &&
2986 sc->current_index_range > sc->index_ranges) {
2987 sc->current_index_range--;
2988 sc->current_index = sc->current_index_range->end - 1;
2989 }
2990}
2991
2992static void mov_current_sample_set(MOVStreamContext *sc, int current_sample)
2993{
2994 int64_t range_size;
2995
2996 sc->current_sample = current_sample;
2997 sc->current_index = current_sample;
2998 if (!sc->index_ranges) {
2999 return;
3000 }
3001
3002 for (sc->current_index_range = sc->index_ranges;
3003 sc->current_index_range->end;
3004 sc->current_index_range++) {
3005 range_size = sc->current_index_range->end - sc->current_index_range->start;
3006 if (range_size > current_sample) {
3007 sc->current_index = sc->current_index_range->start + current_sample;
3008 break;
3009 }
3010 current_sample -= range_size;
3011 }
3012}
3013
3014/**
3015 * Fix st->index_entries, so that it contains only the entries (and the entries
3016 * which are needed to decode them) that fall in the edit list time ranges.
3017 * Also fixes the timestamps of the index entries to match the timeline
3018 * specified the edit lists.
3019 */
3020static void mov_fix_index(MOVContext *mov, AVStream *st)
3021{
3022 MOVStreamContext *msc = st->priv_data;
3023 AVIndexEntry *e_old = st->index_entries;
3024 int nb_old = st->nb_index_entries;
3025 const AVIndexEntry *e_old_end = e_old + nb_old;
3026 const AVIndexEntry *current = NULL;
3027 MOVStts *ctts_data_old = msc->ctts_data;
3028 int64_t ctts_index_old = 0;
3029 int64_t ctts_sample_old = 0;
3030 int64_t ctts_count_old = msc->ctts_count;
3031 int64_t edit_list_media_time = 0;
3032 int64_t edit_list_duration = 0;
3033 int64_t frame_duration = 0;
3034 int64_t edit_list_dts_counter = 0;
3035 int64_t edit_list_dts_entry_end = 0;
3036 int64_t edit_list_start_ctts_sample = 0;
3037 int64_t curr_cts;
3038 int64_t edit_list_index = 0;
3039 int64_t index;
3040 int64_t index_ctts_count;
3041 int flags;
3042 unsigned int ctts_allocated_size = 0;
3043 int64_t start_dts = 0;
3044 int64_t edit_list_media_time_dts = 0;
3045 int64_t edit_list_start_encountered = 0;
3046 int64_t search_timestamp = 0;
3047 int64_t* frame_duration_buffer = NULL;
3048 int num_discarded_begin = 0;
3049 int first_non_zero_audio_edit = -1;
3050 int packet_skip_samples = 0;
3051 MOVIndexRange *current_index_range;
3052
3053 if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
3054 return;
3055 }
3056
3057 // allocate the index ranges array
3058 msc->index_ranges = av_malloc((msc->elst_count + 1) * sizeof(msc->index_ranges[0]));
3059 if (!msc->index_ranges) {
3060 av_log(mov->fc, AV_LOG_ERROR, "Cannot allocate index ranges buffer\n");
3061 return;
3062 }
3063 msc->current_index_range = msc->index_ranges;
3064 current_index_range = msc->index_ranges - 1;
3065
3066 // Clean AVStream from traces of old index
3067 st->index_entries = NULL;
3068 st->index_entries_allocated_size = 0;
3069 st->nb_index_entries = 0;
3070
3071 // Clean ctts fields of MOVStreamContext
3072 msc->ctts_data = NULL;
3073 msc->ctts_count = 0;
3074 msc->ctts_index = 0;
3075 msc->ctts_sample = 0;
3076
3077 // If the dts_shift is positive (in case of negative ctts values in mov),
3078 // then negate the DTS by dts_shift
3079 if (msc->dts_shift > 0)
3080 edit_list_dts_entry_end -= msc->dts_shift;
3081
3082 // Offset the DTS by ctts[0] to make the PTS of the first frame 0
3083 if (ctts_data_old && ctts_count_old > 0) {
3084 edit_list_dts_entry_end -= ctts_data_old[0].duration;
3085 av_log(mov->fc, AV_LOG_DEBUG, "Offset DTS by ctts[%d].duration: %d\n", 0, ctts_data_old[0].duration);
3086 }
3087
3088 start_dts = edit_list_dts_entry_end;
3089
3090 while (get_edit_list_entry(mov, msc, edit_list_index, &edit_list_media_time,
3091 &edit_list_duration, mov->time_scale)) {
3092 av_log(mov->fc, AV_LOG_DEBUG, "Processing st: %d, edit list %"PRId64" - media time: %"PRId64", duration: %"PRId64"\n",
3093 st->index, edit_list_index, edit_list_media_time, edit_list_duration);
3094 edit_list_index++;
3095 edit_list_dts_counter = edit_list_dts_entry_end;
3096 edit_list_dts_entry_end += edit_list_duration;
3097 num_discarded_begin = 0;
3098 if (edit_list_media_time == -1) {
3099 continue;
3100 }
3101
3102 // If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
3103 // according to the edit list below.
3104 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3105 if (first_non_zero_audio_edit < 0) {
3106 first_non_zero_audio_edit = 1;
3107 } else {
3108 first_non_zero_audio_edit = 0;
3109 }
3110
3111 if (first_non_zero_audio_edit > 0)
3112 st->skip_samples = msc->start_pad = 0;
3113 }
3114
3115 //find closest previous key frame
3116 edit_list_media_time_dts = edit_list_media_time;
3117 if (msc->dts_shift > 0) {
3118 edit_list_media_time_dts -= msc->dts_shift;
3119 }
3120
3121 // While reordering frame index according to edit list we must handle properly
3122 // the scenario when edit list entry starts from none key frame.
3123 // We find closest previous key frame and preserve it and consequent frames in index.
3124 // All frames which are outside edit list entry time boundaries will be dropped after decoding.
3125 search_timestamp = edit_list_media_time_dts;
3126 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3127 // Audio decoders like AAC need need a decoder delay samples previous to the current sample,
3128 // to correctly decode this frame. Hence for audio we seek to a frame 1 sec. before the
3129 // edit_list_media_time to cover the decoder delay.
3130 search_timestamp = FFMAX(search_timestamp - msc->time_scale, e_old[0].timestamp);
3131 }
3132
3133 index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, 0);
3134 if (index == -1) {
3135 av_log(mov->fc, AV_LOG_WARNING,
3136 "st: %d edit list: %"PRId64" Missing key frame while searching for timestamp: %"PRId64"\n",
3137 st->index, edit_list_index, search_timestamp);
3138 index = find_prev_closest_index(st, e_old, nb_old, search_timestamp, AVSEEK_FLAG_ANY);
3139
3140 if (index == -1) {
3141 av_log(mov->fc, AV_LOG_WARNING,
3142 "st: %d edit list %"PRId64" Cannot find an index entry before timestamp: %"PRId64".\n"
3143 "Rounding edit list media time to zero.\n",
3144 st->index, edit_list_index, search_timestamp);
3145 index = 0;
3146 edit_list_media_time = 0;
3147 }
3148 }
3149 current = e_old + index;
3150
3151 ctts_index_old = 0;
3152 ctts_sample_old = 0;
3153
3154 // set ctts_index properly for the found key frame
3155 for (index_ctts_count = 0; index_ctts_count < index; index_ctts_count++) {
3156 if (ctts_data_old && ctts_index_old < ctts_count_old) {
3157 ctts_sample_old++;
3158 if (ctts_data_old[ctts_index_old].count == ctts_sample_old) {
3159 ctts_index_old++;
3160 ctts_sample_old = 0;
3161 }
3162 }
3163 }
3164
3165 edit_list_start_ctts_sample = ctts_sample_old;
3166
3167 // Iterate over index and arrange it according to edit list
3168 edit_list_start_encountered = 0;
3169 for (; current < e_old_end; current++, index++) {
3170 // check if frame outside edit list mark it for discard
3171 frame_duration = (current + 1 < e_old_end) ?
3172 ((current + 1)->timestamp - current->timestamp) : edit_list_duration;
3173
3174 flags = current->flags;
3175
3176 // frames (pts) before or after edit list
3177 curr_cts = current->timestamp + msc->dts_shift;
3178
3179 if (ctts_data_old && ctts_index_old < ctts_count_old) {
3180 av_log(mov->fc, AV_LOG_DEBUG, "shifted frame pts, curr_cts: %"PRId64" @ %"PRId64", ctts: %d, ctts_count: %"PRId64"\n",
3181 curr_cts, ctts_index_old, ctts_data_old[ctts_index_old].duration, ctts_count_old);
3182 curr_cts += ctts_data_old[ctts_index_old].duration;
3183 ctts_sample_old++;
3184 if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
3185 if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3186 &ctts_allocated_size,
3187 ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3188 ctts_data_old[ctts_index_old].duration) == -1) {
3189 av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3190 ctts_index_old,
3191 ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
3192 ctts_data_old[ctts_index_old].duration);
3193 break;
3194 }
3195 ctts_index_old++;
3196 ctts_sample_old = 0;
3197 edit_list_start_ctts_sample = 0;
3198 }
3199 }
3200
3201 if (curr_cts < edit_list_media_time || curr_cts >= (edit_list_duration + edit_list_media_time)) {
3202 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
3203 curr_cts < edit_list_media_time && curr_cts + frame_duration > edit_list_media_time &&
3204 first_non_zero_audio_edit > 0) {
3205 packet_skip_samples = edit_list_media_time - curr_cts;
3206 st->skip_samples += packet_skip_samples;
3207
3208 // Shift the index entry timestamp by packet_skip_samples to be correct.
3209 edit_list_dts_counter -= packet_skip_samples;
3210 if (edit_list_start_encountered == 0) {
3211 edit_list_start_encountered = 1;
3212 // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3213 // discarded packets.
3214 if (frame_duration_buffer) {
3215 fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3216 frame_duration_buffer, num_discarded_begin);
3217 av_freep(&frame_duration_buffer);
3218 }
3219 }
3220
3221 av_log(mov->fc, AV_LOG_DEBUG, "skip %d audio samples from curr_cts: %"PRId64"\n", packet_skip_samples, curr_cts);
3222 } else {
3223 flags |= AVINDEX_DISCARD_FRAME;
3224 av_log(mov->fc, AV_LOG_DEBUG, "drop a frame at curr_cts: %"PRId64" @ %"PRId64"\n", curr_cts, index);
3225
3226 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && edit_list_start_encountered == 0) {
3227 num_discarded_begin++;
3228 frame_duration_buffer = av_realloc(frame_duration_buffer,
3229 num_discarded_begin * sizeof(int64_t));
3230 if (!frame_duration_buffer) {
3231 av_log(mov->fc, AV_LOG_ERROR, "Cannot reallocate frame duration buffer\n");
3232 break;
3233 }
3234 frame_duration_buffer[num_discarded_begin - 1] = frame_duration;
3235
3236 // Increment skip_samples for the first non-zero audio edit list
3237 if (first_non_zero_audio_edit > 0 && st->codecpar->codec_id != AV_CODEC_ID_VORBIS) {
3238 st->skip_samples += frame_duration;
3239 msc->start_pad = st->skip_samples;
3240 }
3241 }
3242 }
3243 } else if (edit_list_start_encountered == 0) {
3244 edit_list_start_encountered = 1;
3245 // Make timestamps strictly monotonically increasing for audio, by rewriting timestamps for
3246 // discarded packets.
3247 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && frame_duration_buffer) {
3248 fix_index_entry_timestamps(st, st->nb_index_entries, edit_list_dts_counter,
3249 frame_duration_buffer, num_discarded_begin);
3250 av_freep(&frame_duration_buffer);
3251 }
3252 }
3253
3254 if (add_index_entry(st, current->pos, edit_list_dts_counter, current->size,
3255 current->min_distance, flags) == -1) {
3256 av_log(mov->fc, AV_LOG_ERROR, "Cannot add index entry\n");
3257 break;
3258 }
3259
3260 // Update the index ranges array
3261 if (current_index_range < msc->index_ranges || index != current_index_range->end) {
3262 current_index_range++;
3263 current_index_range->start = index;
3264 }
3265 current_index_range->end = index + 1;
3266
3267 // Only start incrementing DTS in frame_duration amounts, when we encounter a frame in edit list.
3268 if (edit_list_start_encountered > 0) {
3269 edit_list_dts_counter = edit_list_dts_counter + frame_duration;
3270 }
3271
3272 // Break when found first key frame after edit entry completion
3273 if (((curr_cts + frame_duration) >= (edit_list_duration + edit_list_media_time)) &&
3274 ((flags & AVINDEX_KEYFRAME) || ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)))) {
3275
3276 if (ctts_data_old && ctts_sample_old != 0) {
3277 if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
3278 &ctts_allocated_size,
3279 ctts_sample_old - edit_list_start_ctts_sample,
3280 ctts_data_old[ctts_index_old].duration) == -1) {
3281 av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
3282 ctts_index_old, ctts_sample_old - edit_list_start_ctts_sample,
3283 ctts_data_old[ctts_index_old].duration);
3284 break;
3285 }
3286 }
3287 break;
3288 }
3289 }
3290 }
3291 // Update av stream length
3292 st->duration = edit_list_dts_entry_end - start_dts;
3293
3294 // Free the old index and the old CTTS structures
3295 av_free(e_old);
3296 av_free(ctts_data_old);
3297
3298 // Null terminate the index ranges array
3299 current_index_range++;
3300 current_index_range->start = 0;
3301 current_index_range->end = 0;
3302 msc->current_index = msc->index_ranges[0].start;
3303}
3304
3305static void mov_build_index(MOVContext *mov, AVStream *st)
3306{
3307 MOVStreamContext *sc = st->priv_data;
3308 int64_t current_offset;
3309 int64_t current_dts = 0;
3310 unsigned int stts_index = 0;
3311 unsigned int stsc_index = 0;
3312 unsigned int stss_index = 0;
3313 unsigned int stps_index = 0;
3314 unsigned int i, j;
3315 uint64_t stream_size = 0;
3316
3317 if (sc->elst_count) {
3318 int i, edit_start_index = 0, multiple_edits = 0;
3319 int64_t empty_duration = 0; // empty duration of the first edit list entry
3320 int64_t start_time = 0; // start time of the media
3321
3322 for (i = 0; i < sc->elst_count; i++) {
3323 const MOVElst *e = &sc->elst_data[i];
3324 if (i == 0 && e->time == -1) {
3325 /* if empty, the first entry is the start time of the stream
3326 * relative to the presentation itself */
3327 empty_duration = e->duration;
3328 edit_start_index = 1;
3329 } else if (i == edit_start_index && e->time >= 0) {
3330 start_time = e->time;
3331 } else {
3332 multiple_edits = 1;
3333 }
3334 }
3335
3336 if (multiple_edits && !mov->advanced_editlist)
3337 av_log(mov->fc, AV_LOG_WARNING, "multiple edit list entries, "
3338 "Use -advanced_editlist to correctly decode otherwise "
3339 "a/v desync might occur\n");
3340
3341 /* adjust first dts according to edit list */
3342 if ((empty_duration || start_time) && mov->time_scale > 0) {
3343 if (empty_duration)
3344 empty_duration = av_rescale(empty_duration, sc->time_scale, mov->time_scale);
3345 sc->time_offset = start_time - empty_duration;
3346 if (!mov->advanced_editlist)
3347 current_dts = -sc->time_offset;
3348 }
3349
3350 if (!multiple_edits && !mov->advanced_editlist &&
3351 st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
3352 sc->start_pad = start_time;
3353 }
3354
3355 /* only use old uncompressed audio chunk demuxing when stts specifies it */
3356 if (!(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
3357 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
3358 unsigned int current_sample = 0;
3359 unsigned int stts_sample = 0;
3360 unsigned int sample_size;
3361 unsigned int distance = 0;
3362 unsigned int rap_group_index = 0;
3363 unsigned int rap_group_sample = 0;
3364 int64_t last_dts = 0;
3365 int64_t dts_correction = 0;
3366 int rap_group_present = sc->rap_group_count && sc->rap_group;
3367 int key_off = (sc->keyframe_count && sc->keyframes[0] > 0) || (sc->stps_count && sc->stps_data[0] > 0);
3368
3369 current_dts -= sc->dts_shift;
3370 last_dts = current_dts;
3371
3372 if (!sc->sample_count || st->nb_index_entries)
3373 return;
3374 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3375 return;
3376 if (av_reallocp_array(&st->index_entries,
3377 st->nb_index_entries + sc->sample_count,
3378 sizeof(*st->index_entries)) < 0) {
3379 st->nb_index_entries = 0;
3380 return;
3381 }
3382 st->index_entries_allocated_size = (st->nb_index_entries + sc->sample_count) * sizeof(*st->index_entries);
3383
3384 for (i = 0; i < sc->chunk_count; i++) {
3385 int64_t next_offset = i+1 < sc->chunk_count ? sc->chunk_offsets[i+1] : INT64_MAX;
3386 current_offset = sc->chunk_offsets[i];
3387 while (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3388 i + 1 == sc->stsc_data[stsc_index + 1].first)
3389 stsc_index++;
3390
3391 if (next_offset > current_offset && sc->sample_size>0 && sc->sample_size < sc->stsz_sample_size &&
3392 sc->stsc_data[stsc_index].count * (int64_t)sc->stsz_sample_size > next_offset - current_offset) {
3393 av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too large), ignoring\n", sc->stsz_sample_size);
3394 sc->stsz_sample_size = sc->sample_size;
3395 }
3396 if (sc->stsz_sample_size>0 && sc->stsz_sample_size < sc->sample_size) {
3397 av_log(mov->fc, AV_LOG_WARNING, "STSZ sample size %d invalid (too small), ignoring\n", sc->stsz_sample_size);
3398 sc->stsz_sample_size = sc->sample_size;
3399 }
3400
3401 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
3402 int keyframe = 0;
3403 if (current_sample >= sc->sample_count) {
3404 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
3405 return;
3406 }
3407
3408 if (!sc->keyframe_absent && (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index])) {
3409 keyframe = 1;
3410 if (stss_index + 1 < sc->keyframe_count)
3411 stss_index++;
3412 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
3413 keyframe = 1;
3414 if (stps_index + 1 < sc->stps_count)
3415 stps_index++;
3416 }
3417 if (rap_group_present && rap_group_index < sc->rap_group_count) {
3418 if (sc->rap_group[rap_group_index].index > 0)
3419 keyframe = 1;
3420 if (++rap_group_sample == sc->rap_group[rap_group_index].count) {
3421 rap_group_sample = 0;
3422 rap_group_index++;
3423 }
3424 }
3425 if (sc->keyframe_absent
3426 && !sc->stps_count
3427 && !rap_group_present
3428 && (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || (i==0 && j==0)))
3429 keyframe = 1;
3430 if (keyframe)
3431 distance = 0;
3432 sample_size = sc->stsz_sample_size > 0 ? sc->stsz_sample_size : sc->sample_sizes[current_sample];
3433 if (sc->pseudo_stream_id == -1 ||
3434 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
3435 AVIndexEntry *e;
3436 if (sample_size > 0x3FFFFFFF) {
3437 av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", sample_size);
3438 return;
3439 }
3440 e = &st->index_entries[st->nb_index_entries++];
3441 e->pos = current_offset;
3442 e->timestamp = current_dts;
3443 e->size = sample_size;
3444 e->min_distance = distance;
3445 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
3446 av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
3447 "size %u, distance %u, keyframe %d\n", st->index, current_sample,
3448 current_offset, current_dts, sample_size, distance, keyframe);
3449 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->nb_index_entries < 100)
3450 ff_rfps_add_frame(mov->fc, st, current_dts);
3451 }
3452
3453 current_offset += sample_size;
3454 stream_size += sample_size;
3455
3456 /* A negative sample duration is invalid based on the spec,
3457 * but some samples need it to correct the DTS. */
3458 if (sc->stts_data[stts_index].duration < 0) {
3459 av_log(mov->fc, AV_LOG_WARNING,
3460 "Invalid SampleDelta %d in STTS, at %d st:%d\n",
3461 sc->stts_data[stts_index].duration, stts_index,
3462 st->index);
3463 dts_correction += sc->stts_data[stts_index].duration - 1;
3464 sc->stts_data[stts_index].duration = 1;
3465 }
3466 current_dts += sc->stts_data[stts_index].duration;
3467 if (!dts_correction || current_dts + dts_correction > last_dts) {
3468 current_dts += dts_correction;
3469 dts_correction = 0;
3470 } else {
3471 /* Avoid creating non-monotonous DTS */
3472 dts_correction += current_dts - last_dts - 1;
3473 current_dts = last_dts + 1;
3474 }
3475 last_dts = current_dts;
3476 distance++;
3477 stts_sample++;
3478 current_sample++;
3479 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
3480 stts_sample = 0;
3481 stts_index++;
3482 }
3483 }
3484 }
3485 if (st->duration > 0)
3486 st->codecpar->bit_rate = stream_size*8*sc->time_scale/st->duration;
3487 } else {
3488 unsigned chunk_samples, total = 0;
3489
3490 // compute total chunk count
3491 for (i = 0; i < sc->stsc_count; i++) {
3492 unsigned count, chunk_count;
3493
3494 chunk_samples = sc->stsc_data[i].count;
3495 if (i != sc->stsc_count - 1 &&
3496 sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
3497 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
3498 return;
3499 }
3500
3501 if (sc->samples_per_frame >= 160) { // gsm
3502 count = chunk_samples / sc->samples_per_frame;
3503 } else if (sc->samples_per_frame > 1) {
3504 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
3505 count = (chunk_samples+samples-1) / samples;
3506 } else {
3507 count = (chunk_samples+1023) / 1024;
3508 }
3509
3510 if (mov_stsc_index_valid(i, sc->stsc_count))
3511 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
3512 else
3513 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
3514 total += chunk_count * count;
3515 }
3516
3517 av_log(mov->fc, AV_LOG_TRACE, "chunk count %u\n", total);
3518 if (total >= UINT_MAX / sizeof(*st->index_entries) - st->nb_index_entries)
3519 return;
3520 if (av_reallocp_array(&st->index_entries,
3521 st->nb_index_entries + total,
3522 sizeof(*st->index_entries)) < 0) {
3523 st->nb_index_entries = 0;
3524 return;
3525 }
3526 st->index_entries_allocated_size = (st->nb_index_entries + total) * sizeof(*st->index_entries);
3527
3528 // populate index
3529 for (i = 0; i < sc->chunk_count; i++) {
3530 current_offset = sc->chunk_offsets[i];
3531 if (mov_stsc_index_valid(stsc_index, sc->stsc_count) &&
3532 i + 1 == sc->stsc_data[stsc_index + 1].first)
3533 stsc_index++;
3534 chunk_samples = sc->stsc_data[stsc_index].count;
3535
3536 while (chunk_samples > 0) {
3537 AVIndexEntry *e;
3538 unsigned size, samples;
3539
3540 if (sc->samples_per_frame > 1 && !sc->bytes_per_frame) {
3541 avpriv_request_sample(mov->fc,
3542 "Zero bytes per frame, but %d samples per frame",
3543 sc->samples_per_frame);
3544 return;
3545 }
3546
3547 if (sc->samples_per_frame >= 160) { // gsm
3548 samples = sc->samples_per_frame;
3549 size = sc->bytes_per_frame;
3550 } else {
3551 if (sc->samples_per_frame > 1) {
3552 samples = FFMIN((1024 / sc->samples_per_frame)*
3553 sc->samples_per_frame, chunk_samples);
3554 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
3555 } else {
3556 samples = FFMIN(1024, chunk_samples);
3557 size = samples * sc->sample_size;
3558 }
3559 }
3560
3561 if (st->nb_index_entries >= total) {
3562 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %u\n", total);
3563 return;
3564 }
3565 if (size > 0x3FFFFFFF) {
3566 av_log(mov->fc, AV_LOG_ERROR, "Sample size %u is too large\n", size);
3567 return;
3568 }
3569 e = &st->index_entries[st->nb_index_entries++];
3570 e->pos = current_offset;
3571 e->timestamp = current_dts;
3572 e->size = size;
3573 e->min_distance = 0;
3574 e->flags = AVINDEX_KEYFRAME;
3575 av_log(mov->fc, AV_LOG_TRACE, "AVIndex stream %d, chunk %u, offset %"PRIx64", dts %"PRId64", "
3576 "size %u, duration %u\n", st->index, i, current_offset, current_dts,
3577 size, samples);
3578
3579 current_offset += size;
3580 current_dts += samples;
3581 chunk_samples -= samples;
3582 }
3583 }
3584 }
3585
3586 if (!mov->ignore_editlist && mov->advanced_editlist) {
3587 // Fix index according to edit lists.
3588 mov_fix_index(mov, st);
3589 }
3590}
3591
3592static int test_same_origin(const char *src, const char *ref) {
3593 char src_proto[64];
3594 char ref_proto[64];
3595 char src_auth[256];
3596 char ref_auth[256];
3597 char src_host[256];
3598 char ref_host[256];
3599 int src_port=-1;
3600 int ref_port=-1;
3601
3602 av_url_split(src_proto, sizeof(src_proto), src_auth, sizeof(src_auth), src_host, sizeof(src_host), &src_port, NULL, 0, src);
3603 av_url_split(ref_proto, sizeof(ref_proto), ref_auth, sizeof(ref_auth), ref_host, sizeof(ref_host), &ref_port, NULL, 0, ref);
3604
3605 if (strlen(src) == 0) {
3606 return -1;
3607 } else if (strlen(src_auth) + 1 >= sizeof(src_auth) ||
3608 strlen(ref_auth) + 1 >= sizeof(ref_auth) ||
3609 strlen(src_host) + 1 >= sizeof(src_host) ||
3610 strlen(ref_host) + 1 >= sizeof(ref_host)) {
3611 return 0;
3612 } else if (strcmp(src_proto, ref_proto) ||
3613 strcmp(src_auth, ref_auth) ||
3614 strcmp(src_host, ref_host) ||
3615 src_port != ref_port) {
3616 return 0;
3617 } else
3618 return 1;
3619}
3620
3621static int mov_open_dref(MOVContext *c, AVIOContext **pb, const char *src, MOVDref *ref)
3622{
3623 /* try relative path, we do not try the absolute because it can leak information about our
3624 system to an attacker */
3625 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
3626 char filename[1025];
3627 const char *src_path;
3628 int i, l;
3629
3630 /* find a source dir */
3631 src_path = strrchr(src, '/');
3632 if (src_path)
3633 src_path++;
3634 else
3635 src_path = src;
3636
3637 /* find a next level down to target */
3638 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
3639 if (ref->path[l] == '/') {
3640 if (i == ref->nlvl_to - 1)
3641 break;
3642 else
3643 i++;
3644 }
3645
3646 /* compose filename if next level down to target was found */
3647 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
3648 memcpy(filename, src, src_path - src);
3649 filename[src_path - src] = 0;
3650
3651 for (i = 1; i < ref->nlvl_from; i++)
3652 av_strlcat(filename, "../", sizeof(filename));
3653
3654 av_strlcat(filename, ref->path + l + 1, sizeof(filename));
3655 if (!c->use_absolute_path) {
3656 int same_origin = test_same_origin(src, filename);
3657
3658 if (!same_origin) {
3659 av_log(c->fc, AV_LOG_ERROR,
3660 "Reference with mismatching origin, %s not tried for security reasons, "
3661 "set demuxer option use_absolute_path to allow it anyway\n",
3662 ref->path);
3663 return AVERROR(ENOENT);
3664 }
3665
3666 if(strstr(ref->path + l + 1, "..") ||
3667 strstr(ref->path + l + 1, ":") ||
3668 (ref->nlvl_from > 1 && same_origin < 0) ||
3669 (filename[0] == '/' && src_path == src))
3670 return AVERROR(ENOENT);
3671 }
3672
3673 if (strlen(filename) + 1 == sizeof(filename))
3674 return AVERROR(ENOENT);
3675 if (!c->fc->io_open(c->fc, pb, filename, AVIO_FLAG_READ, NULL))
3676 return 0;
3677 }
3678 } else if (c->use_absolute_path) {
3679 av_log(c->fc, AV_LOG_WARNING, "Using absolute path on user request, "
3680 "this is a possible security issue\n");
3681 if (!c->fc->io_open(c->fc, pb, ref->path, AVIO_FLAG_READ, NULL))
3682 return 0;
3683 } else {
3684 av_log(c->fc, AV_LOG_ERROR,
3685 "Absolute path %s not tried for security reasons, "
3686 "set demuxer option use_absolute_path to allow absolute paths\n",
3687 ref->path);
3688 }
3689
3690 return AVERROR(ENOENT);
3691}
3692
3693static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
3694{
3695 if (sc->time_scale <= 0) {
3696 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
3697 sc->time_scale = c->time_scale;
3698 if (sc->time_scale <= 0)
3699 sc->time_scale = 1;
3700 }
3701}
3702
3703static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3704{
3705 AVStream *st;
3706 MOVStreamContext *sc;
3707 int ret;
3708
3709 st = avformat_new_stream(c->fc, NULL);
3710 if (!st) return AVERROR(ENOMEM);
3711 st->id = c->fc->nb_streams;
3712 sc = av_mallocz(sizeof(MOVStreamContext));
3713 if (!sc) return AVERROR(ENOMEM);
3714
3715 st->priv_data = sc;
3716 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3717 sc->ffindex = st->index;
3718 c->trak_index = st->index;
3719
3720 if ((ret = mov_read_default(c, pb, atom)) < 0)
3721 return ret;
3722
3723 c->trak_index = -1;
3724
3725 /* sanity checks */
3726 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
3727 (!sc->sample_size && !sc->sample_count))) {
3728 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
3729 st->index);
3730 return 0;
3731 }
3732
3733 fix_timescale(c, sc);
3734
3735 avpriv_set_pts_info(st, 64, 1, sc->time_scale);
3736
3737 mov_build_index(c, st);
3738
3739 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
3740 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
3741 if (c->enable_drefs) {
3742 if (mov_open_dref(c, &sc->pb, c->fc->filename, dref) < 0)
3743 av_log(c->fc, AV_LOG_ERROR,
3744 "stream %d, error opening alias: path='%s', dir='%s', "
3745 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
3746 st->index, dref->path, dref->dir, dref->filename,
3747 dref->volume, dref->nlvl_from, dref->nlvl_to);
3748 } else {
3749 av_log(c->fc, AV_LOG_WARNING,
3750 "Skipped opening external track: "
3751 "stream %d, alias: path='%s', dir='%s', "
3752 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
3753 "Set enable_drefs to allow this.\n",
3754 st->index, dref->path, dref->dir, dref->filename,
3755 dref->volume, dref->nlvl_from, dref->nlvl_to);
3756 }
3757 } else {
3758 sc->pb = c->fc->pb;
3759 sc->pb_is_copied = 1;
3760 }
3761
3762 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3763 if (!st->sample_aspect_ratio.num && st->codecpar->width && st->codecpar->height &&
3764 sc->height && sc->width &&
3765 (st->codecpar->width != sc->width || st->codecpar->height != sc->height)) {
3766 st->sample_aspect_ratio = av_d2q(((double)st->codecpar->height * sc->width) /
3767 ((double)st->codecpar->width * sc->height), INT_MAX);
3768 }
3769
3770#if FF_API_R_FRAME_RATE
3771 if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
3772 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
3773 sc->time_scale, sc->stts_data[0].duration, INT_MAX);
3774#endif
3775 }
3776
3777 // done for ai5q, ai52, ai55, ai1q, ai12 and ai15.
3778 if (!st->codecpar->extradata_size && st->codecpar->codec_id == AV_CODEC_ID_H264 &&
3779 TAG_IS_AVCI(st->codecpar->codec_tag)) {
3780 ret = ff_generate_avci_extradata(st);
3781 if (ret < 0)
3782 return ret;
3783 }
3784
3785 switch (st->codecpar->codec_id) {
3786#if CONFIG_H261_DECODER
3787 case AV_CODEC_ID_H261:
3788#endif
3789#if CONFIG_H263_DECODER
3790 case AV_CODEC_ID_H263:
3791#endif
3792#if CONFIG_MPEG4_DECODER
3793 case AV_CODEC_ID_MPEG4:
3794#endif
3795 st->codecpar->width = 0; /* let decoder init width/height */
3796 st->codecpar->height= 0;
3797 break;
3798 }
3799
3800 // If the duration of the mp3 packets is not constant, then they could need a parser
3801 if (st->codecpar->codec_id == AV_CODEC_ID_MP3
3802 && sc->stts_count > 3
3803 && sc->stts_count*10 > st->nb_frames
3804 && sc->time_scale == st->codecpar->sample_rate) {
3805 st->need_parsing = AVSTREAM_PARSE_FULL;
3806 }
3807 /* Do not need those anymore. */
3808 av_freep(&sc->chunk_offsets);
3809 av_freep(&sc->sample_sizes);
3810 av_freep(&sc->keyframes);
3811 av_freep(&sc->stts_data);
3812 av_freep(&sc->stps_data);
3813 av_freep(&sc->elst_data);
3814 av_freep(&sc->rap_group);
3815
3816 return 0;
3817}
3818
3819static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3820{
3821 int ret;
3822 c->itunes_metadata = 1;
3823 ret = mov_read_default(c, pb, atom);
3824 c->itunes_metadata = 0;
3825 return ret;
3826}
3827
3828static int mov_read_keys(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3829{
3830 uint32_t count;
3831 uint32_t i;
3832
3833 if (atom.size < 8)
3834 return 0;
3835
3836 avio_skip(pb, 4);
3837 count = avio_rb32(pb);
3838 if (count > UINT_MAX / sizeof(*c->meta_keys) - 1) {
3839 av_log(c->fc, AV_LOG_ERROR,
3840 "The 'keys' atom with the invalid key count: %"PRIu32"\n", count);
3841 return AVERROR_INVALIDDATA;
3842 }
3843
3844 c->meta_keys_count = count + 1;
3845 c->meta_keys = av_mallocz(c->meta_keys_count * sizeof(*c->meta_keys));
3846 if (!c->meta_keys)
3847 return AVERROR(ENOMEM);
3848
3849 for (i = 1; i <= count; ++i) {
3850 uint32_t key_size = avio_rb32(pb);
3851 uint32_t type = avio_rl32(pb);
3852 if (key_size < 8) {
3853 av_log(c->fc, AV_LOG_ERROR,
3854 "The key# %"PRIu32" in meta has invalid size:"
3855 "%"PRIu32"\n", i, key_size);
3856 return AVERROR_INVALIDDATA;
3857 }
3858 key_size -= 8;
3859 if (type != MKTAG('m','d','t','a')) {
3860 avio_skip(pb, key_size);
3861 }
3862 c->meta_keys[i] = av_mallocz(key_size + 1);
3863 if (!c->meta_keys[i])
3864 return AVERROR(ENOMEM);
3865 avio_read(pb, c->meta_keys[i], key_size);
3866 }
3867
3868 return 0;
3869}
3870
3871static int mov_read_custom(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3872{
3873 int64_t end = avio_tell(pb) + atom.size;
3874 uint8_t *key = NULL, *val = NULL, *mean = NULL;
3875 int i;
3876 int ret = 0;
3877 AVStream *st;
3878 MOVStreamContext *sc;
3879
3880 if (c->fc->nb_streams < 1)
3881 return 0;
3882 st = c->fc->streams[c->fc->nb_streams-1];
3883 sc = st->priv_data;
3884
3885 for (i = 0; i < 3; i++) {
3886 uint8_t **p;
3887 uint32_t len, tag;
3888
3889 if (end - avio_tell(pb) <= 12)
3890 break;
3891
3892 len = avio_rb32(pb);
3893 tag = avio_rl32(pb);
3894 avio_skip(pb, 4); // flags
3895
3896 if (len < 12 || len - 12 > end - avio_tell(pb))
3897 break;
3898 len -= 12;
3899
3900 if (tag == MKTAG('m', 'e', 'a', 'n'))
3901 p = &mean;
3902 else if (tag == MKTAG('n', 'a', 'm', 'e'))
3903 p = &key;
3904 else if (tag == MKTAG('d', 'a', 't', 'a') && len > 4) {
3905 avio_skip(pb, 4);
3906 len -= 4;
3907 p = &val;
3908 } else
3909 break;
3910
3911 *p = av_malloc(len + 1);
3912 if (!*p)
3913 break;
3914 ret = ffio_read_size(pb, *p, len);
3915 if (ret < 0) {
3916 av_freep(p);
3917 break;
3918 }
3919 (*p)[len] = 0;
3920 }
3921
3922 if (mean && key && val) {
3923 if (strcmp(key, "iTunSMPB") == 0) {
3924 int priming, remainder, samples;
3925 av_dict_set(&st->metadata, key, val, 0);
3926 if(sscanf(val, "%*X %X %X %X", &priming, &remainder, &samples) == 3){
3927 if(priming>0 && priming<16384)
3928 sc->start_pad = priming;
3929 }
3930 }
3931 if (strcmp(key, "cdec") != 0) {
3932 av_dict_set(&c->fc->metadata, key, val,
3933 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
3934 key = val = NULL;
3935 }
3936 } else {
3937 av_log(c->fc, AV_LOG_VERBOSE,
3938 "Unhandled or malformed custom metadata of size %"PRId64"\n", atom.size);
3939 }
3940
3941 avio_seek(pb, end, SEEK_SET);
3942 av_freep(&key);
3943 av_freep(&val);
3944 av_freep(&mean);
3945 return ret;
3946}
3947
3948static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3949{
3950 while (atom.size > 8) {
3951 uint32_t tag = avio_rl32(pb);
3952 atom.size -= 4;
3953 if (tag == MKTAG('h','d','l','r')) {
3954 avio_seek(pb, -8, SEEK_CUR);
3955 atom.size += 8;
3956 return mov_read_default(c, pb, atom);
3957 }
3958 }
3959 return 0;
3960}
3961
3962// return 1 when matrix is identity, 0 otherwise
3963#define IS_MATRIX_IDENT(matrix) \
3964 ( (matrix)[0][0] == (1 << 16) && \
3965 (matrix)[1][1] == (1 << 16) && \
3966 (matrix)[2][2] == (1 << 30) && \
3967 !(matrix)[0][1] && !(matrix)[0][2] && \
3968 !(matrix)[1][0] && !(matrix)[1][2] && \
3969 !(matrix)[2][0] && !(matrix)[2][1])
3970
3971static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
3972{
3973 int i, j, e;
3974 int width;
3975 int height;
3976 int display_matrix[3][3];
3977 int res_display_matrix[3][3] = { { 0 } };
3978 AVStream *st;
3979 MOVStreamContext *sc;
3980 int version;
3981 int flags;
3982
3983 if (c->fc->nb_streams < 1)
3984 return 0;
3985 st = c->fc->streams[c->fc->nb_streams-1];
3986 sc = st->priv_data;
3987
3988 version = avio_r8(pb);
3989 flags = avio_rb24(pb);
3990 st->disposition |= (flags & MOV_TKHD_FLAG_ENABLED) ? AV_DISPOSITION_DEFAULT : 0;
3991
3992 if (version == 1) {
3993 avio_rb64(pb);
3994 avio_rb64(pb);
3995 } else {
3996 avio_rb32(pb); /* creation time */
3997 avio_rb32(pb); /* modification time */
3998 }
3999 st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
4000 avio_rb32(pb); /* reserved */
4001
4002 /* highlevel (considering edits) duration in movie timebase */
4003 (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
4004 avio_rb32(pb); /* reserved */
4005 avio_rb32(pb); /* reserved */
4006
4007 avio_rb16(pb); /* layer */
4008 avio_rb16(pb); /* alternate group */
4009 avio_rb16(pb); /* volume */
4010 avio_rb16(pb); /* reserved */
4011
4012 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
4013 // they're kept in fixed point format through all calculations
4014 // save u,v,z to store the whole matrix in the AV_PKT_DATA_DISPLAYMATRIX
4015 // side data, but the scale factor is not needed to calculate aspect ratio
4016 for (i = 0; i < 3; i++) {
4017 display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point
4018 display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point
4019 display_matrix[i][2] = avio_rb32(pb); // 2.30 fixed point
4020 }
4021
4022 width = avio_rb32(pb); // 16.16 fixed point track width
4023 height = avio_rb32(pb); // 16.16 fixed point track height
4024 sc->width = width >> 16;
4025 sc->height = height >> 16;
4026
4027 // apply the moov display matrix (after the tkhd one)
4028 for (i = 0; i < 3; i++) {
4029 const int sh[3] = { 16, 16, 30 };
4030 for (j = 0; j < 3; j++) {
4031 for (e = 0; e < 3; e++) {
4032 res_display_matrix[i][j] +=
4033 ((int64_t) display_matrix[i][e] *
4034 c->movie_display_matrix[e][j]) >> sh[e];
4035 }
4036 }
4037 }
4038
4039 // save the matrix when it is not the default identity
4040 if (!IS_MATRIX_IDENT(res_display_matrix)) {
4041 double rotate;
4042
4043 av_freep(&sc->display_matrix);
4044 sc->display_matrix = av_malloc(sizeof(int32_t) * 9);
4045 if (!sc->display_matrix)
4046 return AVERROR(ENOMEM);
4047
4048 for (i = 0; i < 3; i++)
4049 for (j = 0; j < 3; j++)
4050 sc->display_matrix[i * 3 + j] = res_display_matrix[i][j];
4051
4052#if FF_API_OLD_ROTATE_API
4053 rotate = av_display_rotation_get(sc->display_matrix);
4054 if (!isnan(rotate)) {
4055 char rotate_buf[64];
4056 rotate = -rotate;
4057 if (rotate < 0) // for backward compatibility
4058 rotate += 360;
4059 snprintf(rotate_buf, sizeof(rotate_buf), "%g", rotate);
4060 av_dict_set(&st->metadata, "rotate", rotate_buf, 0);
4061 }
4062#endif
4063 }
4064
4065 // transform the display width/height according to the matrix
4066 // to keep the same scale, use [width height 1<<16]
4067 if (width && height && sc->display_matrix) {
4068 double disp_transform[2];
4069
4070 for (i = 0; i < 2; i++)
4071 disp_transform[i] = hypot(sc->display_matrix[0 + i],
4072 sc->display_matrix[3 + i]);
4073
4074 if (disp_transform[0] > 0 && disp_transform[1] > 0 &&
4075 disp_transform[0] < (1<<24) && disp_transform[1] < (1<<24) &&
4076 fabs((disp_transform[0] / disp_transform[1]) - 1.0) > 0.01)
4077 st->sample_aspect_ratio = av_d2q(
4078 disp_transform[0] / disp_transform[1],
4079 INT_MAX);
4080 }
4081 return 0;
4082}
4083
4084static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4085{
4086 MOVFragment *frag = &c->fragment;
4087 MOVTrackExt *trex = NULL;
4088 MOVFragmentIndex* index = NULL;
4089 int flags, track_id, i, found = 0;
4090
4091 avio_r8(pb); /* version */
4092 flags = avio_rb24(pb);
4093
4094 track_id = avio_rb32(pb);
4095 if (!track_id)
4096 return AVERROR_INVALIDDATA;
4097 frag->track_id = track_id;
4098 for (i = 0; i < c->trex_count; i++)
4099 if (c->trex_data[i].track_id == frag->track_id) {
4100 trex = &c->trex_data[i];
4101 break;
4102 }
4103 if (!trex) {
4104 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
4105 return AVERROR_INVALIDDATA;
4106 }
4107
4108 frag->base_data_offset = flags & MOV_TFHD_BASE_DATA_OFFSET ?
4109 avio_rb64(pb) : flags & MOV_TFHD_DEFAULT_BASE_IS_MOOF ?
4110 frag->moof_offset : frag->implicit_offset;
4111 frag->stsd_id = flags & MOV_TFHD_STSD_ID ? avio_rb32(pb) : trex->stsd_id;
4112
4113 frag->duration = flags & MOV_TFHD_DEFAULT_DURATION ?
4114 avio_rb32(pb) : trex->duration;
4115 frag->size = flags & MOV_TFHD_DEFAULT_SIZE ?
4116 avio_rb32(pb) : trex->size;
4117 frag->flags = flags & MOV_TFHD_DEFAULT_FLAGS ?
4118 avio_rb32(pb) : trex->flags;
4119 frag->time = AV_NOPTS_VALUE;
4120 for (i = 0; i < c->fragment_index_count; i++) {
4121 int j;
4122 MOVFragmentIndex* candidate = c->fragment_index_data[i];
4123 if (candidate->track_id == frag->track_id) {
4124 av_log(c->fc, AV_LOG_DEBUG,
4125 "found fragment index for track %u\n", frag->track_id);
4126 index = candidate;
4127 for (j = index->current_item; j < index->item_count; j++) {
4128 if (frag->implicit_offset == index->items[j].moof_offset) {
4129 av_log(c->fc, AV_LOG_DEBUG, "found fragment index entry "
4130 "for track %u and moof_offset %"PRId64"\n",
4131 frag->track_id, index->items[j].moof_offset);
4132 frag->time = index->items[j].time;
4133 index->current_item = j + 1;
4134 found = 1;
4135 break;
4136 }
4137 }
4138 if (found)
4139 break;
4140 }
4141 }
4142 if (index && !found) {
4143 av_log(c->fc, AV_LOG_DEBUG, "track %u has a fragment index but "
4144 "it doesn't have an (in-order) entry for moof_offset "
4145 "%"PRId64"\n", frag->track_id, frag->implicit_offset);
4146 }
4147 av_log(c->fc, AV_LOG_TRACE, "frag flags 0x%x\n", frag->flags);
4148 return 0;
4149}
4150
4151static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4152{
4153 unsigned i, num;
4154 void *new_tracks;
4155
4156 num = atom.size / 4;
4157 if (!(new_tracks = av_malloc_array(num, sizeof(int))))
4158 return AVERROR(ENOMEM);
4159
4160 av_free(c->chapter_tracks);
4161 c->chapter_tracks = new_tracks;
4162 c->nb_chapter_tracks = num;
4163
4164 for (i = 0; i < num && !pb->eof_reached; i++)
4165 c->chapter_tracks[i] = avio_rb32(pb);
4166
4167 return 0;
4168}
4169
4170static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4171{
4172 MOVTrackExt *trex;
4173 int err;
4174
4175 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
4176 return AVERROR_INVALIDDATA;
4177 if ((err = av_reallocp_array(&c->trex_data, c->trex_count + 1,
4178 sizeof(*c->trex_data))) < 0) {
4179 c->trex_count = 0;
4180 return err;
4181 }
4182
4183 c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
4184
4185 trex = &c->trex_data[c->trex_count++];
4186 avio_r8(pb); /* version */
4187 avio_rb24(pb); /* flags */
4188 trex->track_id = avio_rb32(pb);
4189 trex->stsd_id = avio_rb32(pb);
4190 trex->duration = avio_rb32(pb);
4191 trex->size = avio_rb32(pb);
4192 trex->flags = avio_rb32(pb);
4193 return 0;
4194}
4195
4196static int mov_read_tfdt(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4197{
4198 MOVFragment *frag = &c->fragment;
4199 AVStream *st = NULL;
4200 MOVStreamContext *sc;
4201 int version, i;
4202
4203 for (i = 0; i < c->fc->nb_streams; i++) {
4204 if (c->fc->streams[i]->id == frag->track_id) {
4205 st = c->fc->streams[i];
4206 break;
4207 }
4208 }
4209 if (!st) {
4210 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4211 return AVERROR_INVALIDDATA;
4212 }
4213 sc = st->priv_data;
4214 if (sc->pseudo_stream_id + 1 != frag->stsd_id)
4215 return 0;
4216 version = avio_r8(pb);
4217 avio_rb24(pb); /* flags */
4218 if (version) {
4219 sc->track_end = avio_rb64(pb);
4220 } else {
4221 sc->track_end = avio_rb32(pb);
4222 }
4223 return 0;
4224}
4225
4226static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4227{
4228 MOVFragment *frag = &c->fragment;
4229 AVStream *st = NULL;
4230 MOVStreamContext *sc;
4231 MOVStts *ctts_data;
4232 uint64_t offset;
4233 int64_t dts;
4234 int data_offset = 0;
4235 unsigned entries, first_sample_flags = frag->flags;
4236 int flags, distance, i, err;
4237
4238 for (i = 0; i < c->fc->nb_streams; i++) {
4239 if (c->fc->streams[i]->id == frag->track_id) {
4240 st = c->fc->streams[i];
4241 break;
4242 }
4243 }
4244 if (!st) {
4245 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %u\n", frag->track_id);
4246 return AVERROR_INVALIDDATA;
4247 }
4248 sc = st->priv_data;
4249 if (sc->pseudo_stream_id+1 != frag->stsd_id && sc->pseudo_stream_id != -1)
4250 return 0;
4251 avio_r8(pb); /* version */
4252 flags = avio_rb24(pb);
4253 entries = avio_rb32(pb);
4254 av_log(c->fc, AV_LOG_TRACE, "flags 0x%x entries %u\n", flags, entries);
4255
4256 /* Always assume the presence of composition time offsets.
4257 * Without this assumption, for instance, we cannot deal with a track in fragmented movies that meet the following.
4258 * 1) in the initial movie, there are no samples.
4259 * 2) in the first movie fragment, there is only one sample without composition time offset.
4260 * 3) in the subsequent movie fragments, there are samples with composition time offset. */
4261 if (!sc->ctts_count && sc->sample_count)
4262 {
4263 /* Complement ctts table if moov atom doesn't have ctts atom. */
4264 ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
4265 if (!ctts_data)
4266 return AVERROR(ENOMEM);
4267 sc->ctts_data = ctts_data;
4268 sc->ctts_data[sc->ctts_count].count = sc->sample_count;
4269 sc->ctts_data[sc->ctts_count].duration = 0;
4270 sc->ctts_count++;
4271 }
4272 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
4273 return AVERROR_INVALIDDATA;
4274 if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
4275 sizeof(*sc->ctts_data))) < 0) {
4276 sc->ctts_count = 0;
4277 return err;
4278 }
4279 if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb);
4280 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
4281 dts = sc->track_end - sc->time_offset;
4282 offset = frag->base_data_offset + data_offset;
4283 distance = 0;
4284 av_log(c->fc, AV_LOG_TRACE, "first sample flags 0x%x\n", first_sample_flags);
4285 for (i = 0; i < entries && !pb->eof_reached; i++) {
4286 unsigned sample_size = frag->size;
4287 int sample_flags = i ? frag->flags : first_sample_flags;
4288 unsigned sample_duration = frag->duration;
4289 int keyframe = 0;
4290
4291 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
4292 if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb);
4293 if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb);
4294 sc->ctts_data[sc->ctts_count].count = 1;
4295 sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
4296 avio_rb32(pb) : 0;
4297 mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
4298 if (frag->time != AV_NOPTS_VALUE) {
4299 if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
4300 int64_t pts = frag->time;
4301 av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4302 " sc->dts_shift %d ctts.duration %d"
4303 " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
4304 sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
4305 sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
4306 dts = pts - sc->dts_shift;
4307 if (flags & MOV_TRUN_SAMPLE_CTS) {
4308 dts -= sc->ctts_data[sc->ctts_count].duration;
4309 } else {
4310 dts -= sc->time_offset;
4311 }
4312 av_log(c->fc, AV_LOG_DEBUG, "calculated into dts %"PRId64"\n", dts);
4313 } else {
4314 dts = frag->time - sc->time_offset;
4315 av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
4316 ", using it for dts\n", dts);
4317 }
4318 frag->time = AV_NOPTS_VALUE;
4319 }
4320 sc->ctts_count++;
4321 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
4322 keyframe = 1;
4323 else
4324 keyframe =
4325 !(sample_flags & (MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC |
4326 MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
4327 if (keyframe)
4328 distance = 0;
4329 err = av_add_index_entry(st, offset, dts, sample_size, distance,
4330 keyframe ? AVINDEX_KEYFRAME : 0);
4331 if (err < 0) {
4332 av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
4333 }
4334 av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
4335 "size %u, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
4336 offset, dts, sample_size, distance, keyframe);
4337 distance++;
4338 dts += sample_duration;
4339 offset += sample_size;
4340 sc->data_size += sample_size;
4341 sc->duration_for_fps += sample_duration;
4342 sc->nb_frames_for_fps ++;
4343 }
4344
4345 if (pb->eof_reached)
4346 return AVERROR_EOF;
4347
4348 frag->implicit_offset = offset;
4349
4350 sc->track_end = dts + sc->time_offset;
4351 if (st->duration < sc->track_end)
4352 st->duration = sc->track_end;
4353
4354 return 0;
4355}
4356
4357static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4358{
4359 int64_t offset = avio_tell(pb) + atom.size, pts;
4360 uint8_t version;
4361 unsigned i, track_id;
4362 AVStream *st = NULL;
4363 AVStream *ref_st = NULL;
4364 MOVStreamContext *sc, *ref_sc = NULL;
4365 MOVFragmentIndex *index = NULL;
4366 MOVFragmentIndex **tmp;
4367 AVRational timescale;
4368
4369 version = avio_r8(pb);
4370 if (version > 1) {
4371 avpriv_request_sample(c->fc, "sidx version %u", version);
4372 return 0;
4373 }
4374
4375 avio_rb24(pb); // flags
4376
4377 track_id = avio_rb32(pb); // Reference ID
4378 for (i = 0; i < c->fc->nb_streams; i++) {
4379 if (c->fc->streams[i]->id == track_id) {
4380 st = c->fc->streams[i];
4381 break;
4382 }
4383 }
4384 if (!st) {
4385 av_log(c->fc, AV_LOG_WARNING, "could not find corresponding track id %d\n", track_id);
4386 return 0;
4387 }
4388
4389 sc = st->priv_data;
4390
4391 timescale = av_make_q(1, avio_rb32(pb));
4392
4393 if (timescale.den <= 0) {
4394 av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
4395 return AVERROR_INVALIDDATA;
4396 }
4397
4398 if (version == 0) {
4399 pts = avio_rb32(pb);
4400 offset += avio_rb32(pb);
4401 } else {
4402 pts = avio_rb64(pb);
4403 offset += avio_rb64(pb);
4404 }
4405
4406 avio_rb16(pb); // reserved
4407
4408 index = av_mallocz(sizeof(MOVFragmentIndex));
4409 if (!index)
4410 return AVERROR(ENOMEM);
4411
4412 index->track_id = track_id;
4413
4414 index->item_count = avio_rb16(pb);
4415 index->items = av_mallocz_array(index->item_count, sizeof(MOVFragmentIndexItem));
4416
4417 if (!index->items) {
4418 av_freep(&index);
4419 return AVERROR(ENOMEM);
4420 }
4421
4422 for (i = 0; i < index->item_count; i++) {
4423 uint32_t size = avio_rb32(pb);
4424 uint32_t duration = avio_rb32(pb);
4425 if (size & 0x80000000) {
4426 avpriv_request_sample(c->fc, "sidx reference_type 1");
4427 av_freep(&index->items);
4428 av_freep(&index);
4429 return AVERROR_PATCHWELCOME;
4430 }
4431 avio_rb32(pb); // sap_flags
4432 index->items[i].moof_offset = offset;
4433 index->items[i].time = av_rescale_q(pts, st->time_base, timescale);
4434 offset += size;
4435 pts += duration;
4436 }
4437
4438 st->duration = sc->track_end = pts;
4439
4440 tmp = av_realloc_array(c->fragment_index_data,
4441 c->fragment_index_count + 1,
4442 sizeof(MOVFragmentIndex*));
4443 if (!tmp) {
4444 av_freep(&index->items);
4445 av_freep(&index);
4446 return AVERROR(ENOMEM);
4447 }
4448
4449 c->fragment_index_data = tmp;
4450 c->fragment_index_data[c->fragment_index_count++] = index;
4451 sc->has_sidx = 1;
4452
4453 if (offset == avio_size(pb)) {
4454 for (i = 0; i < c->fc->nb_streams; i++) {
4455 if (c->fc->streams[i]->id == c->fragment_index_data[0]->track_id) {
4456 ref_st = c->fc->streams[i];
4457 ref_sc = ref_st->priv_data;
4458 break;
4459 }
4460 }
4461 for (i = 0; i < c->fc->nb_streams; i++) {
4462 st = c->fc->streams[i];
4463 sc = st->priv_data;
4464 if (!sc->has_sidx) {
4465 st->duration = sc->track_end = av_rescale(ref_st->duration, sc->time_scale, ref_sc->time_scale);
4466 }
4467 }
4468
4469 c->fragment_index_complete = 1;
4470 }
4471
4472 return 0;
4473}
4474
4475/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
4476/* like the files created with Adobe Premiere 5.0, for samples see */
4477/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
4478static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4479{
4480 int err;
4481
4482 if (atom.size < 8)
4483 return 0; /* continue */
4484 if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
4485 avio_skip(pb, atom.size - 4);
4486 return 0;
4487 }
4488 atom.type = avio_rl32(pb);
4489 atom.size -= 8;
4490 if (atom.type != MKTAG('m','d','a','t')) {
4491 avio_skip(pb, atom.size);
4492 return 0;
4493 }
4494 err = mov_read_mdat(c, pb, atom);
4495 return err;
4496}
4497
4498static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4499{
4500#if CONFIG_ZLIB
4501 AVIOContext ctx;
4502 uint8_t *cmov_data;
4503 uint8_t *moov_data; /* uncompressed data */
4504 long cmov_len, moov_len;
4505 int ret = -1;
4506
4507 avio_rb32(pb); /* dcom atom */
4508 if (avio_rl32(pb) != MKTAG('d','c','o','m'))
4509 return AVERROR_INVALIDDATA;
4510 if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
4511 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !\n");
4512 return AVERROR_INVALIDDATA;
4513 }
4514 avio_rb32(pb); /* cmvd atom */
4515 if (avio_rl32(pb) != MKTAG('c','m','v','d'))
4516 return AVERROR_INVALIDDATA;
4517 moov_len = avio_rb32(pb); /* uncompressed size */
4518 cmov_len = atom.size - 6 * 4;
4519
4520 cmov_data = av_malloc(cmov_len);
4521 if (!cmov_data)
4522 return AVERROR(ENOMEM);
4523 moov_data = av_malloc(moov_len);
4524 if (!moov_data) {
4525 av_free(cmov_data);
4526 return AVERROR(ENOMEM);
4527 }
4528 ret = ffio_read_size(pb, cmov_data, cmov_len);
4529 if (ret < 0)
4530 goto free_and_return;
4531
4532 if (uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
4533 goto free_and_return;
4534 if (ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
4535 goto free_and_return;
4536 ctx.seekable = AVIO_SEEKABLE_NORMAL;
4537 atom.type = MKTAG('m','o','o','v');
4538 atom.size = moov_len;
4539 ret = mov_read_default(c, &ctx, atom);
4540free_and_return:
4541 av_free(moov_data);
4542 av_free(cmov_data);
4543 return ret;
4544#else
4545 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
4546 return AVERROR(ENOSYS);
4547#endif
4548}
4549
4550/* edit list atom */
4551static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4552{
4553 MOVStreamContext *sc;
4554 int i, edit_count, version;
4555
4556 if (c->fc->nb_streams < 1 || c->ignore_editlist)
4557 return 0;
4558 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
4559
4560 version = avio_r8(pb); /* version */
4561 avio_rb24(pb); /* flags */
4562 edit_count = avio_rb32(pb); /* entries */
4563
4564 if (!edit_count)
4565 return 0;
4566 if (sc->elst_data)
4567 av_log(c->fc, AV_LOG_WARNING, "Duplicated ELST atom\n");
4568 av_free(sc->elst_data);
4569 sc->elst_count = 0;
4570 sc->elst_data = av_malloc_array(edit_count, sizeof(*sc->elst_data));
4571 if (!sc->elst_data)
4572 return AVERROR(ENOMEM);
4573
4574 av_log(c->fc, AV_LOG_TRACE, "track[%u].edit_count = %i\n", c->fc->nb_streams - 1, edit_count);
4575 for (i = 0; i < edit_count && !pb->eof_reached; i++) {
4576 MOVElst *e = &sc->elst_data[i];
4577
4578 if (version == 1) {
4579 e->duration = avio_rb64(pb);
4580 e->time = avio_rb64(pb);
4581 } else {
4582 e->duration = avio_rb32(pb); /* segment duration */
4583 e->time = (int32_t)avio_rb32(pb); /* media time */
4584 }
4585 e->rate = avio_rb32(pb) / 65536.0;
4586 av_log(c->fc, AV_LOG_TRACE, "duration=%"PRId64" time=%"PRId64" rate=%f\n",
4587 e->duration, e->time, e->rate);
4588
4589 if (e->time < 0 && e->time != -1 &&
4590 c->fc->strict_std_compliance >= FF_COMPLIANCE_STRICT) {
4591 av_log(c->fc, AV_LOG_ERROR, "Track %d, edit %d: Invalid edit list media time=%"PRId64"\n",
4592 c->fc->nb_streams-1, i, e->time);
4593 return AVERROR_INVALIDDATA;
4594 }
4595 }
4596 sc->elst_count = i;
4597
4598 return 0;
4599}
4600
4601static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4602{
4603 MOVStreamContext *sc;
4604
4605 if (c->fc->nb_streams < 1)
4606 return AVERROR_INVALIDDATA;
4607 sc = c->fc->streams[c->fc->nb_streams - 1]->priv_data;
4608 sc->timecode_track = avio_rb32(pb);
4609 return 0;
4610}
4611
4612static int mov_read_st3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4613{
4614 AVStream *st;
4615 MOVStreamContext *sc;
4616 enum AVStereo3DType type;
4617 int mode;
4618
4619 if (c->fc->nb_streams < 1)
4620 return 0;
4621
4622 st = c->fc->streams[c->fc->nb_streams - 1];
4623 sc = st->priv_data;
4624
4625 if (atom.size < 5) {
4626 av_log(c->fc, AV_LOG_ERROR, "Empty stereoscopic video box\n");
4627 return AVERROR_INVALIDDATA;
4628 }
4629 avio_skip(pb, 4); /* version + flags */
4630
4631 mode = avio_r8(pb);
4632 switch (mode) {
4633 case 0:
4634 type = AV_STEREO3D_2D;
4635 break;
4636 case 1:
4637 type = AV_STEREO3D_TOPBOTTOM;
4638 break;
4639 case 2:
4640 type = AV_STEREO3D_SIDEBYSIDE;
4641 break;
4642 default:
4643 av_log(c->fc, AV_LOG_WARNING, "Unknown st3d mode value %d\n", mode);
4644 return 0;
4645 }
4646
4647 sc->stereo3d = av_stereo3d_alloc();
4648 if (!sc->stereo3d)
4649 return AVERROR(ENOMEM);
4650
4651 sc->stereo3d->type = type;
4652 return 0;
4653}
4654
4655static int mov_read_sv3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4656{
4657 AVStream *st;
4658 MOVStreamContext *sc;
4659 int size, layout;
4660 int32_t yaw, pitch, roll;
4661 uint32_t l = 0, t = 0, r = 0, b = 0;
4662 uint32_t tag, padding = 0;
4663 enum AVSphericalProjection projection;
4664
4665 if (c->fc->nb_streams < 1)
4666 return 0;
4667
4668 st = c->fc->streams[c->fc->nb_streams - 1];
4669 sc = st->priv_data;
4670
4671 if (atom.size < 8) {
4672 av_log(c->fc, AV_LOG_ERROR, "Empty spherical video box\n");
4673 return AVERROR_INVALIDDATA;
4674 }
4675
4676 size = avio_rb32(pb);
4677 if (size <= 12 || size > atom.size)
4678 return AVERROR_INVALIDDATA;
4679
4680 tag = avio_rl32(pb);
4681 if (tag != MKTAG('s','v','h','d')) {
4682 av_log(c->fc, AV_LOG_ERROR, "Missing spherical video header\n");
4683 return 0;
4684 }
4685 avio_skip(pb, 4); /* version + flags */
4686 avio_skip(pb, size - 12); /* metadata_source */
4687
4688 size = avio_rb32(pb);
4689 if (size > atom.size)
4690 return AVERROR_INVALIDDATA;
4691
4692 tag = avio_rl32(pb);
4693 if (tag != MKTAG('p','r','o','j')) {
4694 av_log(c->fc, AV_LOG_ERROR, "Missing projection box\n");
4695 return 0;
4696 }
4697
4698 size = avio_rb32(pb);
4699 if (size > atom.size)
4700 return AVERROR_INVALIDDATA;
4701
4702 tag = avio_rl32(pb);
4703 if (tag != MKTAG('p','r','h','d')) {
4704 av_log(c->fc, AV_LOG_ERROR, "Missing projection header box\n");
4705 return 0;
4706 }
4707 avio_skip(pb, 4); /* version + flags */
4708
4709 /* 16.16 fixed point */
4710 yaw = avio_rb32(pb);
4711 pitch = avio_rb32(pb);
4712 roll = avio_rb32(pb);
4713
4714 size = avio_rb32(pb);
4715 if (size > atom.size)
4716 return AVERROR_INVALIDDATA;
4717
4718 tag = avio_rl32(pb);
4719 avio_skip(pb, 4); /* version + flags */
4720 switch (tag) {
4721 case MKTAG('c','b','m','p'):
4722 layout = avio_rb32(pb);
4723 if (layout) {
4724 av_log(c->fc, AV_LOG_WARNING,
4725 "Unsupported cubemap layout %d\n", layout);
4726 return 0;
4727 }
4728 projection = AV_SPHERICAL_CUBEMAP;
4729 padding = avio_rb32(pb);
4730 break;
4731 case MKTAG('e','q','u','i'):
4732 t = avio_rb32(pb);
4733 b = avio_rb32(pb);
4734 l = avio_rb32(pb);
4735 r = avio_rb32(pb);
4736
4737 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
4738 av_log(c->fc, AV_LOG_ERROR,
4739 "Invalid bounding rectangle coordinates "
4740 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n", l, t, r, b);
4741 return AVERROR_INVALIDDATA;
4742 }
4743
4744 if (l || t || r || b)
4745 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
4746 else
4747 projection = AV_SPHERICAL_EQUIRECTANGULAR;
4748 break;
4749 default:
4750 av_log(c->fc, AV_LOG_ERROR, "Unknown projection type\n");
4751 return 0;
4752 }
4753
4754 sc->spherical = av_spherical_alloc(&sc->spherical_size);
4755 if (!sc->spherical)
4756 return AVERROR(ENOMEM);
4757
4758 sc->spherical->projection = projection;
4759
4760 sc->spherical->yaw = yaw;
4761 sc->spherical->pitch = pitch;
4762 sc->spherical->roll = roll;
4763
4764 sc->spherical->padding = padding;
4765
4766 sc->spherical->bound_left = l;
4767 sc->spherical->bound_top = t;
4768 sc->spherical->bound_right = r;
4769 sc->spherical->bound_bottom = b;
4770
4771 return 0;
4772}
4773
4774static int mov_parse_uuid_spherical(MOVStreamContext *sc, AVIOContext *pb, size_t len)
4775{
4776 int ret = 0;
4777 uint8_t *buffer = av_malloc(len + 1);
4778 const char *val;
4779
4780 if (!buffer)
4781 return AVERROR(ENOMEM);
4782 buffer[len] = '\0';
4783
4784 ret = ffio_read_size(pb, buffer, len);
4785 if (ret < 0)
4786 goto out;
4787
4788 /* Check for mandatory keys and values, try to support XML as best-effort */
4789 if (av_stristr(buffer, "<GSpherical:StitchingSoftware>") &&
4790 (val = av_stristr(buffer, "<GSpherical:Spherical>")) &&
4791 av_stristr(val, "true") &&
4792 (val = av_stristr(buffer, "<GSpherical:Stitched>")) &&
4793 av_stristr(val, "true") &&
4794 (val = av_stristr(buffer, "<GSpherical:ProjectionType>")) &&
4795 av_stristr(val, "equirectangular")) {
4796 sc->spherical = av_spherical_alloc(&sc->spherical_size);
4797 if (!sc->spherical)
4798 goto out;
4799
4800 sc->spherical->projection = AV_SPHERICAL_EQUIRECTANGULAR;
4801
4802 if (av_stristr(buffer, "<GSpherical:StereoMode>")) {
4803 enum AVStereo3DType mode;
4804
4805 if (av_stristr(buffer, "left-right"))
4806 mode = AV_STEREO3D_SIDEBYSIDE;
4807 else if (av_stristr(buffer, "top-bottom"))
4808 mode = AV_STEREO3D_TOPBOTTOM;
4809 else
4810 mode = AV_STEREO3D_2D;
4811
4812 sc->stereo3d = av_stereo3d_alloc();
4813 if (!sc->stereo3d)
4814 goto out;
4815
4816 sc->stereo3d->type = mode;
4817 }
4818
4819 /* orientation */
4820 val = av_stristr(buffer, "<GSpherical:InitialViewHeadingDegrees>");
4821 if (val)
4822 sc->spherical->yaw = strtol(val, NULL, 10) * (1 << 16);
4823 val = av_stristr(buffer, "<GSpherical:InitialViewPitchDegrees>");
4824 if (val)
4825 sc->spherical->pitch = strtol(val, NULL, 10) * (1 << 16);
4826 val = av_stristr(buffer, "<GSpherical:InitialViewRollDegrees>");
4827 if (val)
4828 sc->spherical->roll = strtol(val, NULL, 10) * (1 << 16);
4829 }
4830
4831out:
4832 av_free(buffer);
4833 return ret;
4834}
4835
4836static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4837{
4838 AVStream *st;
4839 MOVStreamContext *sc;
4840 int64_t ret;
4841 uint8_t uuid[16];
4842 static const uint8_t uuid_isml_manifest[] = {
4843 0xa5, 0xd4, 0x0b, 0x30, 0xe8, 0x14, 0x11, 0xdd,
4844 0xba, 0x2f, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66
4845 };
4846 static const uint8_t uuid_xmp[] = {
4847 0xbe, 0x7a, 0xcf, 0xcb, 0x97, 0xa9, 0x42, 0xe8,
4848 0x9c, 0x71, 0x99, 0x94, 0x91, 0xe3, 0xaf, 0xac
4849 };
4850 static const uint8_t uuid_spherical[] = {
4851 0xff, 0xcc, 0x82, 0x63, 0xf8, 0x55, 0x4a, 0x93,
4852 0x88, 0x14, 0x58, 0x7a, 0x02, 0x52, 0x1f, 0xdd,
4853 };
4854
4855 if (atom.size < sizeof(uuid) || atom.size >= FFMIN(INT_MAX, SIZE_MAX))
4856 return AVERROR_INVALIDDATA;
4857
4858 if (c->fc->nb_streams < 1)
4859 return 0;
4860 st = c->fc->streams[c->fc->nb_streams - 1];
4861 sc = st->priv_data;
4862
4863 ret = avio_read(pb, uuid, sizeof(uuid));
4864 if (ret < 0) {
4865 return ret;
4866 } else if (ret != sizeof(uuid)) {
4867 return AVERROR_INVALIDDATA;
4868 }
4869 if (!memcmp(uuid, uuid_isml_manifest, sizeof(uuid))) {
4870 uint8_t *buffer, *ptr;
4871 char *endptr;
4872 size_t len = atom.size - sizeof(uuid);
4873
4874 if (len < 4) {
4875 return AVERROR_INVALIDDATA;
4876 }
4877 ret = avio_skip(pb, 4); // zeroes
4878 len -= 4;
4879
4880 buffer = av_mallocz(len + 1);
4881 if (!buffer) {
4882 return AVERROR(ENOMEM);
4883 }
4884 ret = avio_read(pb, buffer, len);
4885 if (ret < 0) {
4886 av_free(buffer);
4887 return ret;
4888 } else if (ret != len) {
4889 av_free(buffer);
4890 return AVERROR_INVALIDDATA;
4891 }
4892
4893 ptr = buffer;
4894 while ((ptr = av_stristr(ptr, "systemBitrate=\""))) {
4895 ptr += sizeof("systemBitrate=\"") - 1;
4896 c->bitrates_count++;
4897 c->bitrates = av_realloc_f(c->bitrates, c->bitrates_count, sizeof(*c->bitrates));
4898 if (!c->bitrates) {
4899 c->bitrates_count = 0;
4900 av_free(buffer);
4901 return AVERROR(ENOMEM);
4902 }
4903 errno = 0;
4904 ret = strtol(ptr, &endptr, 10);
4905 if (ret < 0 || errno || *endptr != '"') {
4906 c->bitrates[c->bitrates_count - 1] = 0;
4907 } else {
4908 c->bitrates[c->bitrates_count - 1] = ret;
4909 }
4910 }
4911
4912 av_free(buffer);
4913 } else if (!memcmp(uuid, uuid_xmp, sizeof(uuid))) {
4914 uint8_t *buffer;
4915 size_t len = atom.size - sizeof(uuid);
4916 if (c->export_xmp) {
4917 buffer = av_mallocz(len + 1);
4918 if (!buffer) {
4919 return AVERROR(ENOMEM);
4920 }
4921 ret = avio_read(pb, buffer, len);
4922 if (ret < 0) {
4923 av_free(buffer);
4924 return ret;
4925 } else if (ret != len) {
4926 av_free(buffer);
4927 return AVERROR_INVALIDDATA;
4928 }
4929 buffer[len] = '\0';
4930 av_dict_set(&c->fc->metadata, "xmp", buffer, 0);
4931 av_free(buffer);
4932 } else {
4933 // skip all uuid atom, which makes it fast for long uuid-xmp file
4934 ret = avio_skip(pb, len);
4935 if (ret < 0)
4936 return ret;
4937 }
4938 } else if (!memcmp(uuid, uuid_spherical, sizeof(uuid))) {
4939 size_t len = atom.size - sizeof(uuid);
4940 ret = mov_parse_uuid_spherical(sc, pb, len);
4941 if (ret < 0)
4942 return ret;
4943 if (!sc->spherical)
4944 av_log(c->fc, AV_LOG_WARNING, "Invalid spherical metadata found\n"); }
4945
4946 return 0;
4947}
4948
4949static int mov_read_free(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4950{
4951 int ret;
4952 uint8_t content[16];
4953
4954 if (atom.size < 8)
4955 return 0;
4956
4957 ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
4958 if (ret < 0)
4959 return ret;
4960
4961 if ( !c->found_moov
4962 && !c->found_mdat
4963 && !memcmp(content, "Anevia\x1A\x1A", 8)
4964 && c->use_mfra_for == FF_MOV_FLAG_MFRA_AUTO) {
4965 c->use_mfra_for = FF_MOV_FLAG_MFRA_PTS;
4966 }
4967
4968 return 0;
4969}
4970
4971static int mov_read_frma(MOVContext *c, AVIOContext *pb, MOVAtom atom)
4972{
4973 uint32_t format = avio_rl32(pb);
4974 MOVStreamContext *sc;
4975 enum AVCodecID id;
4976 AVStream *st;
4977
4978 if (c->fc->nb_streams < 1)
4979 return 0;
4980 st = c->fc->streams[c->fc->nb_streams - 1];
4981 sc = st->priv_data;
4982
4983 switch (sc->format)
4984 {
4985 case MKTAG('e','n','c','v'): // encrypted video
4986 case MKTAG('e','n','c','a'): // encrypted audio
4987 id = mov_codec_id(st, format);
4988 if (st->codecpar->codec_id != AV_CODEC_ID_NONE &&
4989 st->codecpar->codec_id != id) {
4990 av_log(c->fc, AV_LOG_WARNING,
4991 "ignoring 'frma' atom of '%.4s', stream has codec id %d\n",
4992 (char*)&format, st->codecpar->codec_id);
4993 break;
4994 }
4995
4996 st->codecpar->codec_id = id;
4997 sc->format = format;
4998 break;
4999
5000 default:
5001 if (format != sc->format) {
5002 av_log(c->fc, AV_LOG_WARNING,
5003 "ignoring 'frma' atom of '%.4s', stream format is '%.4s'\n",
5004 (char*)&format, (char*)&sc->format);
5005 }
5006 break;
5007 }
5008
5009 return 0;
5010}
5011
5012static int mov_read_senc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
5013{
5014 AVStream *st;
5015 MOVStreamContext *sc;
5016 size_t auxiliary_info_size;
5017
5018 if (c->decryption_key_len == 0 || c->fc->nb_streams < 1)
5019 return 0;
5020
5021 st = c->fc->streams[c->fc->nb_streams - 1];
5022 sc = st->priv_data;
5023
5024 if (sc->cenc.aes_ctr) {
5025 av_log(c->fc, AV_LOG_ERROR, "duplicate senc atom\n");
5026 return AVERROR_INVALIDDATA;
5027 }
5028
5029 avio_r8(pb); /* version */
5030 sc->cenc.use_subsamples = avio_rb24(pb) & 0x02; /* flags */
5031
5032 avio_rb32(pb); /* entries */
5033
5034 if (atom.size < 8 || atom.size > FFMIN(INT_MAX, SIZE_MAX)) {
5035 av_log(c->fc, AV_LOG_ERROR, "senc atom size %"PRId64" invalid\n", atom.size);
5036 return AVERROR_INVALIDDATA;
5037 }
5038
5039 /* save the auxiliary info as is */
5040 auxiliary_info_size = atom.size - 8;
5041
5042 sc->cenc.auxiliary_info = av_malloc(auxiliary_info_size);
5043 if (!sc->cenc.auxiliary_info) {
5044 return AVERROR(ENOMEM);
5045 }
5046
5047 sc->cenc.auxiliary_info_end = sc->cenc.auxiliary_info + auxiliary_info_size;
5048 sc->cenc.auxiliary_info_pos = sc->cenc.auxiliary_info;
5049 sc->cenc.auxiliary_info_index = 0;
5050
5051 if (avio_read(pb, sc->cenc.auxiliary_info, auxiliary_info_size) != auxiliary_info_size) {
5052 av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info");
5053 return AVERROR_INVALIDDATA;
5054 }
5055
5056 /* initialize the cipher */
5057 sc->cenc.aes_ctr = av_aes_ctr_alloc();
5058 if (!sc->cenc.aes_ctr) {
5059 return AVERROR(ENOMEM);
5060 }
5061
5062 return av_aes_ctr_init(sc->cenc.aes_ctr, c->decryption_key);
5063}
5064
5065static int mov_read_saiz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
5066{
5067 AVStream *st;
5068 MOVStreamContext *sc;
5069 size_t data_size;
5070 int atom_header_size;
5071 int flags;
5072
5073 if (c->decryption_key_len == 0 || c->fc->nb_streams < 1)
5074 return 0;
5075
5076 st = c->fc->streams[c->fc->nb_streams - 1];
5077 sc = st->priv_data;
5078
5079 if (sc->cenc.auxiliary_info_sizes || sc->cenc.auxiliary_info_default_size) {
5080 av_log(c->fc, AV_LOG_ERROR, "duplicate saiz atom\n");
5081 return AVERROR_INVALIDDATA;
5082 }
5083
5084 atom_header_size = 9;
5085
5086 avio_r8(pb); /* version */
5087 flags = avio_rb24(pb);
5088
5089 if ((flags & 0x01) != 0) {
5090 atom_header_size += 8;
5091
5092 avio_rb32(pb); /* info type */
5093 avio_rb32(pb); /* info type param */
5094 }
5095
5096 sc->cenc.auxiliary_info_default_size = avio_r8(pb);
5097 avio_rb32(pb); /* entries */
5098
5099 if (atom.size <= atom_header_size) {
5100 return 0;
5101 }
5102
5103 if (atom.size > FFMIN(INT_MAX, SIZE_MAX)) {
5104 av_log(c->fc, AV_LOG_ERROR, "saiz atom auxiliary_info_sizes size %"PRId64" invalid\n", atom.size);
5105 return AVERROR_INVALIDDATA;
5106 }
5107
5108 /* save the auxiliary info sizes as is */
5109 data_size = atom.size - atom_header_size;
5110
5111 sc->cenc.auxiliary_info_sizes = av_malloc(data_size);
5112 if (!sc->cenc.auxiliary_info_sizes) {
5113 return AVERROR(ENOMEM);
5114 }
5115
5116 sc->cenc.auxiliary_info_sizes_count = data_size;
5117
5118 if (avio_read(pb, sc->cenc.auxiliary_info_sizes, data_size) != data_size) {
5119 av_log(c->fc, AV_LOG_ERROR, "failed to read the auxiliary info sizes");
5120 return AVERROR_INVALIDDATA;
5121 }
5122
5123 return 0;
5124}
5125
5126static int mov_read_dfla(MOVContext *c, AVIOContext *pb, MOVAtom atom)
5127{
5128 AVStream *st;
5129 int last, type, size, ret;
5130 uint8_t buf[4];
5131
5132 if (c->fc->nb_streams < 1)
5133 return 0;
5134 st = c->fc->streams[c->fc->nb_streams-1];
5135
5136 if ((uint64_t)atom.size > (1<<30) || atom.size < 42)
5137 return AVERROR_INVALIDDATA;
5138
5139 /* Check FlacSpecificBox version. */
5140 if (avio_r8(pb) != 0)
5141 return AVERROR_INVALIDDATA;
5142
5143 avio_rb24(pb); /* Flags */
5144
5145 avio_read(pb, buf, sizeof(buf));
5146 flac_parse_block_header(buf, &last, &type, &size);
5147
5148 if (type != FLAC_METADATA_TYPE_STREAMINFO || size != FLAC_STREAMINFO_SIZE) {
5149 av_log(c->fc, AV_LOG_ERROR, "STREAMINFO must be first FLACMetadataBlock\n");
5150 return AVERROR_INVALIDDATA;
5151 }
5152
5153 ret = ff_get_extradata(c->fc, st->codecpar, pb, size);
5154 if (ret < 0)
5155 return ret;
5156
5157 if (!last)
5158 av_log(c->fc, AV_LOG_WARNING, "non-STREAMINFO FLACMetadataBlock(s) ignored\n");
5159
5160 return 0;
5161}
5162
5163static int mov_seek_auxiliary_info(MOVContext *c, MOVStreamContext *sc, int64_t index)
5164{
5165 size_t auxiliary_info_seek_offset = 0;
5166 int i;
5167
5168 if (sc->cenc.auxiliary_info_default_size) {
5169 auxiliary_info_seek_offset = (size_t)sc->cenc.auxiliary_info_default_size * index;
5170 } else if (sc->cenc.auxiliary_info_sizes) {
5171 if (index > sc->cenc.auxiliary_info_sizes_count) {
5172 av_log(c, AV_LOG_ERROR, "current sample %"PRId64" greater than the number of auxiliary info sample sizes %"SIZE_SPECIFIER"\n",
5173 index, sc->cenc.auxiliary_info_sizes_count);
5174 return AVERROR_INVALIDDATA;
5175 }
5176
5177 for (i = 0; i < index; i++) {
5178 auxiliary_info_seek_offset += sc->cenc.auxiliary_info_sizes[i];
5179 }
5180 }
5181
5182 if (auxiliary_info_seek_offset > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info) {
5183 av_log(c, AV_LOG_ERROR, "auxiliary info offset %"SIZE_SPECIFIER" greater than auxiliary info size %"SIZE_SPECIFIER"\n",
5184 auxiliary_info_seek_offset, (size_t)(sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info));
5185 return AVERROR_INVALIDDATA;
5186 }
5187
5188 sc->cenc.auxiliary_info_pos = sc->cenc.auxiliary_info + auxiliary_info_seek_offset;
5189 sc->cenc.auxiliary_info_index = index;
5190 return 0;
5191}
5192
5193static int cenc_filter(MOVContext *c, MOVStreamContext *sc, int64_t index, uint8_t *input, int size)
5194{
5195 uint32_t encrypted_bytes;
5196 uint16_t subsample_count;
5197 uint16_t clear_bytes;
5198 uint8_t* input_end = input + size;
5199 int ret;
5200
5201 if (index != sc->cenc.auxiliary_info_index) {
5202 ret = mov_seek_auxiliary_info(c, sc, index);
5203 if (ret < 0) {
5204 return ret;
5205 }
5206 }
5207
5208 /* read the iv */
5209 if (AES_CTR_IV_SIZE > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
5210 av_log(c->fc, AV_LOG_ERROR, "failed to read iv from the auxiliary info\n");
5211 return AVERROR_INVALIDDATA;
5212 }
5213
5214 av_aes_ctr_set_iv(sc->cenc.aes_ctr, sc->cenc.auxiliary_info_pos);
5215 sc->cenc.auxiliary_info_pos += AES_CTR_IV_SIZE;
5216
5217 if (!sc->cenc.use_subsamples)
5218 {
5219 /* decrypt the whole packet */
5220 av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, size);
5221 return 0;
5222 }
5223
5224 /* read the subsample count */
5225 if (sizeof(uint16_t) > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
5226 av_log(c->fc, AV_LOG_ERROR, "failed to read subsample count from the auxiliary info\n");
5227 return AVERROR_INVALIDDATA;
5228 }
5229
5230 subsample_count = AV_RB16(sc->cenc.auxiliary_info_pos);
5231 sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
5232
5233 for (; subsample_count > 0; subsample_count--)
5234 {
5235 if (6 > sc->cenc.auxiliary_info_end - sc->cenc.auxiliary_info_pos) {
5236 av_log(c->fc, AV_LOG_ERROR, "failed to read subsample from the auxiliary info\n");
5237 return AVERROR_INVALIDDATA;
5238 }
5239
5240 /* read the number of clear / encrypted bytes */
5241 clear_bytes = AV_RB16(sc->cenc.auxiliary_info_pos);
5242 sc->cenc.auxiliary_info_pos += sizeof(uint16_t);
5243 encrypted_bytes = AV_RB32(sc->cenc.auxiliary_info_pos);
5244 sc->cenc.auxiliary_info_pos += sizeof(uint32_t);
5245
5246 if ((uint64_t)clear_bytes + encrypted_bytes > input_end - input) {
5247 av_log(c->fc, AV_LOG_ERROR, "subsample size exceeds the packet size left\n");
5248 return AVERROR_INVALIDDATA;
5249 }
5250
5251 /* skip the clear bytes */
5252 input += clear_bytes;
5253
5254 /* decrypt the encrypted bytes */
5255 av_aes_ctr_crypt(sc->cenc.aes_ctr, input, input, encrypted_bytes);
5256 input += encrypted_bytes;
5257 }
5258
5259 if (input < input_end) {
5260 av_log(c->fc, AV_LOG_ERROR, "leftover packet bytes after subsample processing\n");
5261 return AVERROR_INVALIDDATA;
5262 }
5263
5264 sc->cenc.auxiliary_info_index++;
5265 return 0;
5266}
5267
5268static const MOVParseTableEntry mov_default_parse_table[] = {
5269{ MKTAG('A','C','L','R'), mov_read_aclr },
5270{ MKTAG('A','P','R','G'), mov_read_avid },
5271{ MKTAG('A','A','L','P'), mov_read_avid },
5272{ MKTAG('A','R','E','S'), mov_read_ares },
5273{ MKTAG('a','v','s','s'), mov_read_avss },
5274{ MKTAG('c','h','p','l'), mov_read_chpl },
5275{ MKTAG('c','o','6','4'), mov_read_stco },
5276{ MKTAG('c','o','l','r'), mov_read_colr },
5277{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
5278{ MKTAG('d','i','n','f'), mov_read_default },
5279{ MKTAG('D','p','x','E'), mov_read_dpxe },
5280{ MKTAG('d','r','e','f'), mov_read_dref },
5281{ MKTAG('e','d','t','s'), mov_read_default },
5282{ MKTAG('e','l','s','t'), mov_read_elst },
5283{ MKTAG('e','n','d','a'), mov_read_enda },
5284{ MKTAG('f','i','e','l'), mov_read_fiel },
5285{ MKTAG('a','d','r','m'), mov_read_adrm },
5286{ MKTAG('f','t','y','p'), mov_read_ftyp },
5287{ MKTAG('g','l','b','l'), mov_read_glbl },
5288{ MKTAG('h','d','l','r'), mov_read_hdlr },
5289{ MKTAG('i','l','s','t'), mov_read_ilst },
5290{ MKTAG('j','p','2','h'), mov_read_jp2h },
5291{ MKTAG('m','d','a','t'), mov_read_mdat },
5292{ MKTAG('m','d','h','d'), mov_read_mdhd },
5293{ MKTAG('m','d','i','a'), mov_read_default },
5294{ MKTAG('m','e','t','a'), mov_read_meta },
5295{ MKTAG('m','i','n','f'), mov_read_default },
5296{ MKTAG('m','o','o','f'), mov_read_moof },
5297{ MKTAG('m','o','o','v'), mov_read_moov },
5298{ MKTAG('m','v','e','x'), mov_read_default },
5299{ MKTAG('m','v','h','d'), mov_read_mvhd },
5300{ MKTAG('S','M','I',' '), mov_read_svq3 },
5301{ MKTAG('a','l','a','c'), mov_read_alac }, /* alac specific atom */
5302{ MKTAG('a','v','c','C'), mov_read_glbl },
5303{ MKTAG('p','a','s','p'), mov_read_pasp },
5304{ MKTAG('s','i','d','x'), mov_read_sidx },
5305{ MKTAG('s','t','b','l'), mov_read_default },
5306{ MKTAG('s','t','c','o'), mov_read_stco },
5307{ MKTAG('s','t','p','s'), mov_read_stps },
5308{ MKTAG('s','t','r','f'), mov_read_strf },
5309{ MKTAG('s','t','s','c'), mov_read_stsc },
5310{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
5311{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
5312{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
5313{ MKTAG('s','t','t','s'), mov_read_stts },
5314{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
5315{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
5316{ MKTAG('t','f','d','t'), mov_read_tfdt },
5317{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
5318{ MKTAG('t','r','a','k'), mov_read_trak },
5319{ MKTAG('t','r','a','f'), mov_read_default },
5320{ MKTAG('t','r','e','f'), mov_read_default },
5321{ MKTAG('t','m','c','d'), mov_read_tmcd },
5322{ MKTAG('c','h','a','p'), mov_read_chap },
5323{ MKTAG('t','r','e','x'), mov_read_trex },
5324{ MKTAG('t','r','u','n'), mov_read_trun },
5325{ MKTAG('u','d','t','a'), mov_read_default },
5326{ MKTAG('w','a','v','e'), mov_read_wave },
5327{ MKTAG('e','s','d','s'), mov_read_esds },
5328{ MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
5329{ MKTAG('d','e','c','3'), mov_read_dec3 }, /* EAC-3 info */
5330{ MKTAG('d','d','t','s'), mov_read_ddts }, /* DTS audio descriptor */
5331{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
5332{ MKTAG('w','f','e','x'), mov_read_wfex },
5333{ MKTAG('c','m','o','v'), mov_read_cmov },
5334{ MKTAG('c','h','a','n'), mov_read_chan }, /* channel layout */
5335{ MKTAG('d','v','c','1'), mov_read_dvc1 },
5336{ MKTAG('s','b','g','p'), mov_read_sbgp },
5337{ MKTAG('h','v','c','C'), mov_read_glbl },
5338{ MKTAG('u','u','i','d'), mov_read_uuid },
5339{ MKTAG('C','i','n', 0x8e), mov_read_targa_y216 },
5340{ MKTAG('f','r','e','e'), mov_read_free },
5341{ MKTAG('-','-','-','-'), mov_read_custom },
5342{ MKTAG('s','i','n','f'), mov_read_default },
5343{ MKTAG('f','r','m','a'), mov_read_frma },
5344{ MKTAG('s','e','n','c'), mov_read_senc },
5345{ MKTAG('s','a','i','z'), mov_read_saiz },
5346{ MKTAG('d','f','L','a'), mov_read_dfla },
5347{ MKTAG('s','t','3','d'), mov_read_st3d }, /* stereoscopic 3D video box */
5348{ MKTAG('s','v','3','d'), mov_read_sv3d }, /* spherical video box */
5349{ 0, NULL }
5350};
5351
5352static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
5353{
5354 int64_t total_size = 0;
5355 MOVAtom a;
5356 int i;
5357
5358 if (c->atom_depth > 10) {
5359 av_log(c->fc, AV_LOG_ERROR, "Atoms too deeply nested\n");
5360 return AVERROR_INVALIDDATA;
5361 }
5362 c->atom_depth ++;
5363
5364 if (atom.size < 0)
5365 atom.size = INT64_MAX;
5366 while (total_size + 8 <= atom.size && !avio_feof(pb)) {
5367 int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
5368 a.size = atom.size;
5369 a.type=0;
5370 if (atom.size >= 8) {
5371 a.size = avio_rb32(pb);
5372 a.type = avio_rl32(pb);
5373 if (a.type == MKTAG('f','r','e','e') &&
5374 a.size >= 8 &&
5375 c->fc->strict_std_compliance < FF_COMPLIANCE_STRICT &&
5376 c->moov_retry) {
5377 uint8_t buf[8];
5378 uint32_t *type = (uint32_t *)buf + 1;
5379 if (avio_read(pb, buf, 8) != 8)
5380 return AVERROR_INVALIDDATA;
5381 avio_seek(pb, -8, SEEK_CUR);
5382 if (*type == MKTAG('m','v','h','d') ||
5383 *type == MKTAG('c','m','o','v')) {
5384 av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
5385 a.type = MKTAG('m','o','o','v');
5386 }
5387 }
5388 if (atom.type != MKTAG('r','o','o','t') &&
5389 atom.type != MKTAG('m','o','o','v'))
5390 {
5391 if (a.type == MKTAG('t','r','a','k') || a.type == MKTAG('m','d','a','t'))
5392 {
5393 av_log(c->fc, AV_LOG_ERROR, "Broken file, trak/mdat not at top-level\n");
5394 avio_skip(pb, -8);
5395 c->atom_depth --;
5396 return 0;
5397 }
5398 }
5399 total_size += 8;
5400 if (a.size == 1 && total_size + 8 <= atom.size) { /* 64 bit extended size */
5401 a.size = avio_rb64(pb) - 8;
5402 total_size += 8;
5403 }
5404 }
5405 av_log(c->fc, AV_LOG_TRACE, "type:'%s' parent:'%s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
5406 av_fourcc2str(a.type), av_fourcc2str(atom.type), a.size, total_size, atom.size);
5407 if (a.size == 0) {
5408 a.size = atom.size - total_size + 8;
5409 }
5410 a.size -= 8;
5411 if (a.size < 0)
5412 break;
5413 a.size = FFMIN(a.size, atom.size - total_size);
5414
5415 for (i = 0; mov_default_parse_table[i].type; i++)
5416 if (mov_default_parse_table[i].type == a.type) {
5417 parse = mov_default_parse_table[i].parse;
5418 break;
5419 }
5420
5421 // container is user data
5422 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
5423 atom.type == MKTAG('i','l','s','t')))
5424 parse = mov_read_udta_string;
5425
5426 // Supports parsing the QuickTime Metadata Keys.
5427 // https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html
5428 if (!parse && c->found_hdlr_mdta &&
5429 atom.type == MKTAG('m','e','t','a') &&
5430 a.type == MKTAG('k','e','y','s')) {
5431 parse = mov_read_keys;
5432 }
5433
5434 if (!parse) { /* skip leaf atoms data */
5435 avio_skip(pb, a.size);
5436 } else {
5437 int64_t start_pos = avio_tell(pb);
5438 int64_t left;
5439 int err = parse(c, pb, a);
5440 if (err < 0) {
5441 c->atom_depth --;
5442 return err;
5443 }
5444 if (c->found_moov && c->found_mdat &&
5445 ((!(pb->seekable & AVIO_SEEKABLE_NORMAL) || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete) ||
5446 start_pos + a.size == avio_size(pb))) {
5447 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || c->fc->flags & AVFMT_FLAG_IGNIDX || c->fragment_index_complete)
5448 c->next_root_atom = start_pos + a.size;
5449 c->atom_depth --;
5450 return 0;
5451 }
5452 left = a.size - avio_tell(pb) + start_pos;
5453 if (left > 0) /* skip garbage at atom end */
5454 avio_skip(pb, left);
5455 else if (left < 0) {
5456 av_log(c->fc, AV_LOG_WARNING,
5457 "overread end of atom '%.4s' by %"PRId64" bytes\n",
5458 (char*)&a.type, -left);
5459 avio_seek(pb, left, SEEK_CUR);
5460 }
5461 }
5462
5463 total_size += a.size;
5464 }
5465
5466 if (total_size < atom.size && atom.size < 0x7ffff)
5467 avio_skip(pb, atom.size - total_size);
5468
5469 c->atom_depth --;
5470 return 0;
5471}
5472
5473static int mov_probe(AVProbeData *p)
5474{
5475 int64_t offset;
5476 uint32_t tag;
5477 int score = 0;
5478 int moov_offset = -1;
5479
5480 /* check file header */
5481 offset = 0;
5482 for (;;) {
5483 /* ignore invalid offset */
5484 if ((offset + 8) > (unsigned int)p->buf_size)
5485 break;
5486 tag = AV_RL32(p->buf + offset + 4);
5487 switch(tag) {
5488 /* check for obvious tags */
5489 case MKTAG('m','o','o','v'):
5490 moov_offset = offset + 4;
5491 case MKTAG('m','d','a','t'):
5492 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
5493 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
5494 case MKTAG('f','t','y','p'):
5495 if (AV_RB32(p->buf+offset) < 8 &&
5496 (AV_RB32(p->buf+offset) != 1 ||
5497 offset + 12 > (unsigned int)p->buf_size ||
5498 AV_RB64(p->buf+offset + 8) == 0)) {
5499 score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
5500 } else if (tag == MKTAG('f','t','y','p') &&
5501 ( AV_RL32(p->buf + offset + 8) == MKTAG('j','p','2',' ')
5502 || AV_RL32(p->buf + offset + 8) == MKTAG('j','p','x',' ')
5503 )) {
5504 score = FFMAX(score, 5);
5505 } else {
5506 score = AVPROBE_SCORE_MAX;
5507 }
5508 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
5509 break;
5510 /* those are more common words, so rate then a bit less */
5511 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
5512 case MKTAG('w','i','d','e'):
5513 case MKTAG('f','r','e','e'):
5514 case MKTAG('j','u','n','k'):
5515 case MKTAG('p','i','c','t'):
5516 score = FFMAX(score, AVPROBE_SCORE_MAX - 5);
5517 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
5518 break;
5519 case MKTAG(0x82,0x82,0x7f,0x7d):
5520 case MKTAG('s','k','i','p'):
5521 case MKTAG('u','u','i','d'):
5522 case MKTAG('p','r','f','l'):
5523 /* if we only find those cause probedata is too small at least rate them */
5524 score = FFMAX(score, AVPROBE_SCORE_EXTENSION);
5525 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
5526 break;
5527 default:
5528 offset = FFMAX(4, AV_RB32(p->buf+offset)) + offset;
5529 }
5530 }
5531 if(score > AVPROBE_SCORE_MAX - 50 && moov_offset != -1) {
5532 /* moov atom in the header - we should make sure that this is not a
5533 * MOV-packed MPEG-PS */
5534 offset = moov_offset;
5535
5536 while(offset < (p->buf_size - 16)){ /* Sufficient space */
5537 /* We found an actual hdlr atom */
5538 if(AV_RL32(p->buf + offset ) == MKTAG('h','d','l','r') &&
5539 AV_RL32(p->buf + offset + 8) == MKTAG('m','h','l','r') &&
5540 AV_RL32(p->buf + offset + 12) == MKTAG('M','P','E','G')){
5541 av_log(NULL, AV_LOG_WARNING, "Found media data tag MPEG indicating this is a MOV-packed MPEG-PS.\n");
5542 /* We found a media handler reference atom describing an
5543 * MPEG-PS-in-MOV, return a
5544 * low score to force expanding the probe window until
5545 * mpegps_probe finds what it needs */
5546 return 5;
5547 }else
5548 /* Keep looking */
5549 offset+=2;
5550 }
5551 }
5552
5553 return score;
5554}
5555
5556// must be done after parsing all trak because there's no order requirement
5557static void mov_read_chapters(AVFormatContext *s)
5558{
5559 MOVContext *mov = s->priv_data;
5560 AVStream *st;
5561 MOVStreamContext *sc;
5562 int64_t cur_pos;
5563 int i, j;
5564 int chapter_track;
5565
5566 for (j = 0; j < mov->nb_chapter_tracks; j++) {
5567 chapter_track = mov->chapter_tracks[j];
5568 st = NULL;
5569 for (i = 0; i < s->nb_streams; i++)
5570 if (s->streams[i]->id == chapter_track) {
5571 st = s->streams[i];
5572 break;
5573 }
5574 if (!st) {
5575 av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
5576 continue;
5577 }
5578
5579 sc = st->priv_data;
5580 cur_pos = avio_tell(sc->pb);
5581
5582 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
5583 st->disposition |= AV_DISPOSITION_ATTACHED_PIC | AV_DISPOSITION_TIMED_THUMBNAILS;
5584 if (st->nb_index_entries) {
5585 // Retrieve the first frame, if possible
5586 AVPacket pkt;
5587 AVIndexEntry *sample = &st->index_entries[0];
5588 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
5589 av_log(s, AV_LOG_ERROR, "Failed to retrieve first frame\n");
5590 goto finish;
5591 }
5592
5593 if (av_get_packet(sc->pb, &pkt, sample->size) < 0)
5594 goto finish;
5595
5596 st->attached_pic = pkt;
5597 st->attached_pic.stream_index = st->index;
5598 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
5599 }
5600 } else {
5601 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
5602 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
5603 st->discard = AVDISCARD_ALL;
5604 for (i = 0; i < st->nb_index_entries; i++) {
5605 AVIndexEntry *sample = &st->index_entries[i];
5606 int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
5607 uint8_t *title;
5608 uint16_t ch;
5609 int len, title_len;
5610
5611 if (end < sample->timestamp) {
5612 av_log(s, AV_LOG_WARNING, "ignoring stream duration which is shorter than chapters\n");
5613 end = AV_NOPTS_VALUE;
5614 }
5615
5616 if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
5617 av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
5618 goto finish;
5619 }
5620
5621 // the first two bytes are the length of the title
5622 len = avio_rb16(sc->pb);
5623 if (len > sample->size-2)
5624 continue;
5625 title_len = 2*len + 1;
5626 if (!(title = av_mallocz(title_len)))
5627 goto finish;
5628
5629 // The samples could theoretically be in any encoding if there's an encd
5630 // atom following, but in practice are only utf-8 or utf-16, distinguished
5631 // instead by the presence of a BOM
5632 if (!len) {
5633 title[0] = 0;
5634 } else {
5635 ch = avio_rb16(sc->pb);
5636 if (ch == 0xfeff)
5637 avio_get_str16be(sc->pb, len, title, title_len);
5638 else if (ch == 0xfffe)
5639 avio_get_str16le(sc->pb, len, title, title_len);
5640 else {
5641 AV_WB16(title, ch);
5642 if (len == 1 || len == 2)
5643 title[len] = 0;
5644 else
5645 avio_get_str(sc->pb, INT_MAX, title + 2, len - 1);
5646 }
5647 }
5648
5649 avpriv_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
5650 av_freep(&title);
5651 }
5652 }
5653finish:
5654 avio_seek(sc->pb, cur_pos, SEEK_SET);
5655 }
5656}
5657
5658static int parse_timecode_in_framenum_format(AVFormatContext *s, AVStream *st,
5659 uint32_t value, int flags)
5660{
5661 AVTimecode tc;
5662 char buf[AV_TIMECODE_STR_SIZE];
5663 AVRational rate = st->avg_frame_rate;
5664 int ret = av_timecode_init(&tc, rate, flags, 0, s);
5665 if (ret < 0)
5666 return ret;
5667 av_dict_set(&st->metadata, "timecode",
5668 av_timecode_make_string(&tc, buf, value), 0);
5669 return 0;
5670}
5671
5672static int mov_read_rtmd_track(AVFormatContext *s, AVStream *st)
5673{
5674 MOVStreamContext *sc = st->priv_data;
5675 char buf[AV_TIMECODE_STR_SIZE];
5676 int64_t cur_pos = avio_tell(sc->pb);
5677 int hh, mm, ss, ff, drop;
5678
5679 if (!st->nb_index_entries)
5680 return -1;
5681
5682 avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
5683 avio_skip(s->pb, 13);
5684 hh = avio_r8(s->pb);
5685 mm = avio_r8(s->pb);
5686 ss = avio_r8(s->pb);
5687 drop = avio_r8(s->pb);
5688 ff = avio_r8(s->pb);
5689 snprintf(buf, AV_TIMECODE_STR_SIZE, "%02d:%02d:%02d%c%02d",
5690 hh, mm, ss, drop ? ';' : ':', ff);
5691 av_dict_set(&st->metadata, "timecode", buf, 0);
5692
5693 avio_seek(sc->pb, cur_pos, SEEK_SET);
5694 return 0;
5695}
5696
5697static int mov_read_timecode_track(AVFormatContext *s, AVStream *st)
5698{
5699 MOVStreamContext *sc = st->priv_data;
5700 int flags = 0;
5701 int64_t cur_pos = avio_tell(sc->pb);
5702 uint32_t value;
5703
5704 if (!st->nb_index_entries)
5705 return -1;
5706
5707 avio_seek(sc->pb, st->index_entries->pos, SEEK_SET);
5708 value = avio_rb32(s->pb);
5709
5710 if (sc->tmcd_flags & 0x0001) flags |= AV_TIMECODE_FLAG_DROPFRAME;
5711 if (sc->tmcd_flags & 0x0002) flags |= AV_TIMECODE_FLAG_24HOURSMAX;
5712 if (sc->tmcd_flags & 0x0004) flags |= AV_TIMECODE_FLAG_ALLOWNEGATIVE;
5713
5714 /* Assume Counter flag is set to 1 in tmcd track (even though it is likely
5715 * not the case) and thus assume "frame number format" instead of QT one.
5716 * No sample with tmcd track can be found with a QT timecode at the moment,
5717 * despite what the tmcd track "suggests" (Counter flag set to 0 means QT
5718 * format). */
5719 parse_timecode_in_framenum_format(s, st, value, flags);
5720
5721 avio_seek(sc->pb, cur_pos, SEEK_SET);
5722 return 0;
5723}
5724
5725static int mov_read_close(AVFormatContext *s)
5726{
5727 MOVContext *mov = s->priv_data;
5728 int i, j;
5729
5730 for (i = 0; i < s->nb_streams; i++) {
5731 AVStream *st = s->streams[i];
5732 MOVStreamContext *sc = st->priv_data;
5733
5734 if (!sc)
5735 continue;
5736
5737 av_freep(&sc->ctts_data);
5738 for (j = 0; j < sc->drefs_count; j++) {
5739 av_freep(&sc->drefs[j].path);
5740 av_freep(&sc->drefs[j].dir);
5741 }
5742 av_freep(&sc->drefs);
5743
5744 sc->drefs_count = 0;
5745
5746 if (!sc->pb_is_copied)
5747 ff_format_io_close(s, &sc->pb);
5748
5749 sc->pb = NULL;
5750 av_freep(&sc->chunk_offsets);
5751 av_freep(&sc->stsc_data);
5752 av_freep(&sc->sample_sizes);
5753 av_freep(&sc->keyframes);
5754 av_freep(&sc->stts_data);
5755 av_freep(&sc->stps_data);
5756 av_freep(&sc->elst_data);
5757 av_freep(&sc->rap_group);
5758 av_freep(&sc->display_matrix);
5759 av_freep(&sc->index_ranges);
5760
5761 if (sc->extradata)
5762 for (j = 0; j < sc->stsd_count; j++)
5763 av_free(sc->extradata[j]);
5764 av_freep(&sc->extradata);
5765 av_freep(&sc->extradata_size);
5766
5767 av_freep(&sc->cenc.auxiliary_info);
5768 av_freep(&sc->cenc.auxiliary_info_sizes);
5769 av_aes_ctr_free(sc->cenc.aes_ctr);
5770
5771 av_freep(&sc->stereo3d);
5772 av_freep(&sc->spherical);
5773 }
5774
5775 if (mov->dv_demux) {
5776 avformat_free_context(mov->dv_fctx);
5777 mov->dv_fctx = NULL;
5778 }
5779
5780 if (mov->meta_keys) {
5781 for (i = 1; i < mov->meta_keys_count; i++) {
5782 av_freep(&mov->meta_keys[i]);
5783 }
5784 av_freep(&mov->meta_keys);
5785 }
5786
5787 av_freep(&mov->trex_data);
5788 av_freep(&mov->bitrates);
5789
5790 for (i = 0; i < mov->fragment_index_count; i++) {
5791 MOVFragmentIndex* index = mov->fragment_index_data[i];
5792 av_freep(&index->items);
5793 av_freep(&mov->fragment_index_data[i]);
5794 }
5795 av_freep(&mov->fragment_index_data);
5796
5797 av_freep(&mov->aes_decrypt);
5798 av_freep(&mov->chapter_tracks);
5799
5800 return 0;
5801}
5802
5803static int tmcd_is_referenced(AVFormatContext *s, int tmcd_id)
5804{
5805 int i;
5806
5807 for (i = 0; i < s->nb_streams; i++) {
5808 AVStream *st = s->streams[i];
5809 MOVStreamContext *sc = st->priv_data;
5810
5811 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
5812 sc->timecode_track == tmcd_id)
5813 return 1;
5814 }
5815 return 0;
5816}
5817
5818/* look for a tmcd track not referenced by any video track, and export it globally */
5819static void export_orphan_timecode(AVFormatContext *s)
5820{
5821 int i;
5822
5823 for (i = 0; i < s->nb_streams; i++) {
5824 AVStream *st = s->streams[i];
5825
5826 if (st->codecpar->codec_tag == MKTAG('t','m','c','d') &&
5827 !tmcd_is_referenced(s, i + 1)) {
5828 AVDictionaryEntry *tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
5829 if (tcr) {
5830 av_dict_set(&s->metadata, "timecode", tcr->value, 0);
5831 break;
5832 }
5833 }
5834 }
5835}
5836
5837static int read_tfra(MOVContext *mov, AVIOContext *f)
5838{
5839 MOVFragmentIndex* index = NULL;
5840 int version, fieldlength, i, j;
5841 int64_t pos = avio_tell(f);
5842 uint32_t size = avio_rb32(f);
5843 void *tmp;
5844
5845 if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) {
5846 return 1;
5847 }
5848 av_log(mov->fc, AV_LOG_VERBOSE, "found tfra\n");
5849 index = av_mallocz(sizeof(MOVFragmentIndex));
5850 if (!index) {
5851 return AVERROR(ENOMEM);
5852 }
5853
5854 tmp = av_realloc_array(mov->fragment_index_data,
5855 mov->fragment_index_count + 1,
5856 sizeof(MOVFragmentIndex*));
5857 if (!tmp) {
5858 av_freep(&index);
5859 return AVERROR(ENOMEM);
5860 }
5861 mov->fragment_index_data = tmp;
5862 mov->fragment_index_data[mov->fragment_index_count++] = index;
5863
5864 version = avio_r8(f);
5865 avio_rb24(f);
5866 index->track_id = avio_rb32(f);
5867 fieldlength = avio_rb32(f);
5868 index->item_count = avio_rb32(f);
5869 index->items = av_mallocz_array(
5870 index->item_count, sizeof(MOVFragmentIndexItem));
5871 if (!index->items) {
5872 index->item_count = 0;
5873 return AVERROR(ENOMEM);
5874 }
5875 for (i = 0; i < index->item_count; i++) {
5876 int64_t time, offset;
5877 if (version == 1) {
5878 time = avio_rb64(f);
5879 offset = avio_rb64(f);
5880 } else {
5881 time = avio_rb32(f);
5882 offset = avio_rb32(f);
5883 }
5884 index->items[i].time = time;
5885 index->items[i].moof_offset = offset;
5886 for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
5887 avio_r8(f);
5888 for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
5889 avio_r8(f);
5890 for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
5891 avio_r8(f);
5892 }
5893
5894 avio_seek(f, pos + size, SEEK_SET);
5895 return 0;
5896}
5897
5898static int mov_read_mfra(MOVContext *c, AVIOContext *f)
5899{
5900 int64_t stream_size = avio_size(f);
5901 int64_t original_pos = avio_tell(f);
5902 int64_t seek_ret;
5903 int32_t mfra_size;
5904 int ret = -1;
5905 if ((seek_ret = avio_seek(f, stream_size - 4, SEEK_SET)) < 0) {
5906 ret = seek_ret;
5907 goto fail;
5908 }
5909 mfra_size = avio_rb32(f);
5910 if (mfra_size < 0 || mfra_size > stream_size) {
5911 av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (unreasonable size)\n");
5912 goto fail;
5913 }
5914 if ((seek_ret = avio_seek(f, -mfra_size, SEEK_CUR)) < 0) {
5915 ret = seek_ret;
5916 goto fail;
5917 }
5918 if (avio_rb32(f) != mfra_size) {
5919 av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (size mismatch)\n");
5920 goto fail;
5921 }
5922 if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
5923 av_log(c->fc, AV_LOG_DEBUG, "doesn't look like mfra (tag mismatch)\n");
5924 goto fail;
5925 }
5926 av_log(c->fc, AV_LOG_VERBOSE, "stream has mfra\n");
5927 do {
5928 ret = read_tfra(c, f);
5929 if (ret < 0)
5930 goto fail;
5931 } while (!ret);
5932 ret = 0;
5933fail:
5934 seek_ret = avio_seek(f, original_pos, SEEK_SET);
5935 if (seek_ret < 0) {
5936 av_log(c->fc, AV_LOG_ERROR,
5937 "failed to seek back after looking for mfra\n");
5938 ret = seek_ret;
5939 }
5940 return ret;
5941}
5942
5943static int mov_read_header(AVFormatContext *s)
5944{
5945 MOVContext *mov = s->priv_data;
5946 AVIOContext *pb = s->pb;
5947 int j, err;
5948 MOVAtom atom = { AV_RL32("root") };
5949 int i;
5950
5951 if (mov->decryption_key_len != 0 && mov->decryption_key_len != AES_CTR_KEY_SIZE) {
5952 av_log(s, AV_LOG_ERROR, "Invalid decryption key len %d expected %d\n",
5953 mov->decryption_key_len, AES_CTR_KEY_SIZE);
5954 return AVERROR(EINVAL);
5955 }
5956
5957 mov->fc = s;
5958 mov->trak_index = -1;
5959 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
5960 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
5961 atom.size = avio_size(pb);
5962 else
5963 atom.size = INT64_MAX;
5964
5965 /* check MOV header */
5966 do {
5967 if (mov->moov_retry)
5968 avio_seek(pb, 0, SEEK_SET);
5969 if ((err = mov_read_default(mov, pb, atom)) < 0) {
5970 av_log(s, AV_LOG_ERROR, "error reading header\n");
5971 mov_read_close(s);
5972 return err;
5973 }
5974 } while ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mov->found_moov && !mov->moov_retry++);
5975 if (!mov->found_moov) {
5976 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
5977 mov_read_close(s);
5978 return AVERROR_INVALIDDATA;
5979 }
5980 av_log(mov->fc, AV_LOG_TRACE, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
5981
5982 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
5983 if (mov->nb_chapter_tracks > 0 && !mov->ignore_chapters)
5984 mov_read_chapters(s);
5985 for (i = 0; i < s->nb_streams; i++)
5986 if (s->streams[i]->codecpar->codec_tag == AV_RL32("tmcd")) {
5987 mov_read_timecode_track(s, s->streams[i]);
5988 } else if (s->streams[i]->codecpar->codec_tag == AV_RL32("rtmd")) {
5989 mov_read_rtmd_track(s, s->streams[i]);
5990 }
5991 }
5992
5993 /* copy timecode metadata from tmcd tracks to the related video streams */
5994 for (i = 0; i < s->nb_streams; i++) {
5995 AVStream *st = s->streams[i];
5996 MOVStreamContext *sc = st->priv_data;
5997 if (sc->timecode_track > 0) {
5998 AVDictionaryEntry *tcr;
5999 int tmcd_st_id = -1;
6000
6001 for (j = 0; j < s->nb_streams; j++)
6002 if (s->streams[j]->id == sc->timecode_track)
6003 tmcd_st_id = j;
6004
6005 if (tmcd_st_id < 0 || tmcd_st_id == i)
6006 continue;
6007 tcr = av_dict_get(s->streams[tmcd_st_id]->metadata, "timecode", NULL, 0);
6008 if (tcr)
6009 av_dict_set(&st->metadata, "timecode", tcr->value, 0);
6010 }
6011 }
6012 export_orphan_timecode(s);
6013
6014 for (i = 0; i < s->nb_streams; i++) {
6015 AVStream *st = s->streams[i];
6016 MOVStreamContext *sc = st->priv_data;
6017 fix_timescale(mov, sc);
6018 if(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->codec_id == AV_CODEC_ID_AAC) {
6019 st->skip_samples = sc->start_pad;
6020 }
6021 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && sc->nb_frames_for_fps > 0 && sc->duration_for_fps > 0)
6022 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
6023 sc->time_scale*(int64_t)sc->nb_frames_for_fps, sc->duration_for_fps, INT_MAX);
6024 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
6025 if (st->codecpar->width <= 0 || st->codecpar->height <= 0) {
6026 st->codecpar->width = sc->width;
6027 st->codecpar->height = sc->height;
6028 }
6029 if (st->codecpar->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
6030 if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
6031 return err;
6032 }
6033 }
6034 if (mov->handbrake_version &&
6035 mov->handbrake_version <= 1000000*0 + 1000*10 + 2 && // 0.10.2
6036 st->codecpar->codec_id == AV_CODEC_ID_MP3
6037 ) {
6038 av_log(s, AV_LOG_VERBOSE, "Forcing full parsing for mp3 stream\n");
6039 st->need_parsing = AVSTREAM_PARSE_FULL;
6040 }
6041 }
6042
6043 if (mov->trex_data) {
6044 for (i = 0; i < s->nb_streams; i++) {
6045 AVStream *st = s->streams[i];
6046 MOVStreamContext *sc = st->priv_data;
6047 if (st->duration > 0) {
6048 if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
6049 av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
6050 sc->data_size, sc->time_scale);
6051 mov_read_close(s);
6052 return AVERROR_INVALIDDATA;
6053 }
6054 st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
6055 }
6056 }
6057 }
6058
6059 if (mov->use_mfra_for > 0) {
6060 for (i = 0; i < s->nb_streams; i++) {
6061 AVStream *st = s->streams[i];
6062 MOVStreamContext *sc = st->priv_data;
6063 if (sc->duration_for_fps > 0) {
6064 if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
6065 av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
6066 sc->data_size, sc->time_scale);
6067 mov_read_close(s);
6068 return AVERROR_INVALIDDATA;
6069 }
6070 st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale /
6071 sc->duration_for_fps;
6072 }
6073 }
6074 }
6075
6076 for (i = 0; i < mov->bitrates_count && i < s->nb_streams; i++) {
6077 if (mov->bitrates[i]) {
6078 s->streams[i]->codecpar->bit_rate = mov->bitrates[i];
6079 }
6080 }
6081
6082 ff_rfps_calculate(s);
6083
6084 for (i = 0; i < s->nb_streams; i++) {
6085 AVStream *st = s->streams[i];
6086 MOVStreamContext *sc = st->priv_data;
6087
6088 switch (st->codecpar->codec_type) {
6089 case AVMEDIA_TYPE_AUDIO:
6090 err = ff_replaygain_export(st, s->metadata);
6091 if (err < 0) {
6092 mov_read_close(s);
6093 return err;
6094 }
6095 break;
6096 case AVMEDIA_TYPE_VIDEO:
6097 if (sc->display_matrix) {
6098 err = av_stream_add_side_data(st, AV_PKT_DATA_DISPLAYMATRIX, (uint8_t*)sc->display_matrix,
6099 sizeof(int32_t) * 9);
6100 if (err < 0)
6101 return err;
6102
6103 sc->display_matrix = NULL;
6104 }
6105 if (sc->stereo3d) {
6106 err = av_stream_add_side_data(st, AV_PKT_DATA_STEREO3D,
6107 (uint8_t *)sc->stereo3d,
6108 sizeof(*sc->stereo3d));
6109 if (err < 0)
6110 return err;
6111
6112 sc->stereo3d = NULL;
6113 }
6114 if (sc->spherical) {
6115 err = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL,
6116 (uint8_t *)sc->spherical,
6117 sc->spherical_size);
6118 if (err < 0)
6119 return err;
6120
6121 sc->spherical = NULL;
6122 }
6123 break;
6124 }
6125 }
6126 ff_configure_buffers_for_index(s, AV_TIME_BASE);
6127
6128 return 0;
6129}
6130
6131static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
6132{
6133 AVIndexEntry *sample = NULL;
6134 int64_t best_dts = INT64_MAX;
6135 int i;
6136 for (i = 0; i < s->nb_streams; i++) {
6137 AVStream *avst = s->streams[i];
6138 MOVStreamContext *msc = avst->priv_data;
6139 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
6140 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
6141 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
6142 av_log(s, AV_LOG_TRACE, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
6143 if (!sample || (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && current_sample->pos < sample->pos) ||
6144 ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
6145 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
6146 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
6147 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
6148 sample = current_sample;
6149 best_dts = dts;
6150 *st = avst;
6151 }
6152 }
6153 }
6154 return sample;
6155}
6156
6157static int should_retry(AVIOContext *pb, int error_code) {
6158 if (error_code == AVERROR_EOF || avio_feof(pb))
6159 return 0;
6160
6161 return 1;
6162}
6163
6164static int mov_switch_root(AVFormatContext *s, int64_t target)
6165{
6166 MOVContext *mov = s->priv_data;
6167 int i, j;
6168 int already_read = 0;
6169
6170 if (avio_seek(s->pb, target, SEEK_SET) != target) {
6171 av_log(mov->fc, AV_LOG_ERROR, "root atom offset 0x%"PRIx64": partial file\n", target);
6172 return AVERROR_INVALIDDATA;
6173 }
6174
6175 mov->next_root_atom = 0;
6176
6177 for (i = 0; i < mov->fragment_index_count; i++) {
6178 MOVFragmentIndex *index = mov->fragment_index_data[i];
6179 int found = 0;
6180 for (j = 0; j < index->item_count; j++) {
6181 MOVFragmentIndexItem *item = &index->items[j];
6182 if (found) {
6183 mov->next_root_atom = item->moof_offset;
6184 break; // Advance to next index in outer loop
6185 } else if (item->moof_offset == target) {
6186 index->current_item = FFMIN(j, index->current_item);
6187 if (item->headers_read)
6188 already_read = 1;
6189 item->headers_read = 1;
6190 found = 1;
6191 }
6192 }
6193 if (!found)
6194 index->current_item = 0;
6195 }
6196
6197 if (already_read)
6198 return 0;
6199
6200 mov->found_mdat = 0;
6201
6202 if (mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
6203 avio_feof(s->pb))
6204 return AVERROR_EOF;
6205 av_log(s, AV_LOG_TRACE, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
6206
6207 return 1;
6208}
6209
6210static int mov_change_extradata(MOVStreamContext *sc, AVPacket *pkt)
6211{
6212 uint8_t *side, *extradata;
6213 int extradata_size;
6214
6215 /* Save the current index. */
6216 sc->last_stsd_index = sc->stsc_data[sc->stsc_index].id - 1;
6217
6218 /* Notify the decoder that extradata changed. */
6219 extradata_size = sc->extradata_size[sc->last_stsd_index];
6220 extradata = sc->extradata[sc->last_stsd_index];
6221 if (extradata_size > 0 && extradata) {
6222 side = av_packet_new_side_data(pkt,
6223 AV_PKT_DATA_NEW_EXTRADATA,
6224 extradata_size);
6225 if (!side)
6226 return AVERROR(ENOMEM);
6227 memcpy(side, extradata, extradata_size);
6228 }
6229
6230 return 0;
6231}
6232
6233static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
6234{
6235 MOVContext *mov = s->priv_data;
6236 MOVStreamContext *sc;
6237 AVIndexEntry *sample;
6238 AVStream *st = NULL;
6239 int64_t current_index;
6240 int ret;
6241 mov->fc = s;
6242 retry:
6243 sample = mov_find_next_sample(s, &st);
6244 if (!sample || (mov->next_root_atom && sample->pos > mov->next_root_atom)) {
6245 if (!mov->next_root_atom)
6246 return AVERROR_EOF;
6247 if ((ret = mov_switch_root(s, mov->next_root_atom)) < 0)
6248 return ret;
6249 goto retry;
6250 }
6251 sc = st->priv_data;
6252 /* must be done just before reading, to avoid infinite loop on sample */
6253 current_index = sc->current_index;
6254 mov_current_sample_inc(sc);
6255
6256 if (mov->next_root_atom) {
6257 sample->pos = FFMIN(sample->pos, mov->next_root_atom);
6258 sample->size = FFMIN(sample->size, (mov->next_root_atom - sample->pos));
6259 }
6260
6261 if (st->discard != AVDISCARD_ALL) {
6262 int64_t ret64 = avio_seek(sc->pb, sample->pos, SEEK_SET);
6263 if (ret64 != sample->pos) {
6264 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
6265 sc->ffindex, sample->pos);
6266 if (should_retry(sc->pb, ret64)) {
6267 mov_current_sample_dec(sc);
6268 }
6269 return AVERROR_INVALIDDATA;
6270 }
6271
6272 if( st->discard == AVDISCARD_NONKEY && 0==(sample->flags & AVINDEX_KEYFRAME) ) {
6273 av_log(mov->fc, AV_LOG_DEBUG, "Nonkey frame from stream %d discarded due to AVDISCARD_NONKEY\n", sc->ffindex);
6274 goto retry;
6275 }
6276
6277 ret = av_get_packet(sc->pb, pkt, sample->size);
6278 if (ret < 0) {
6279 if (should_retry(sc->pb, ret)) {
6280 mov_current_sample_dec(sc);
6281 }
6282 return ret;
6283 }
6284 if (sc->has_palette) {
6285 uint8_t *pal;
6286
6287 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
6288 if (!pal) {
6289 av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
6290 } else {
6291 memcpy(pal, sc->palette, AVPALETTE_SIZE);
6292 sc->has_palette = 0;
6293 }
6294 }
6295#if CONFIG_DV_DEMUXER
6296 if (mov->dv_demux && sc->dv_audio_container) {
6297 avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
6298 av_freep(&pkt->data);
6299 pkt->size = 0;
6300 ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
6301 if (ret < 0)
6302 return ret;
6303 }
6304#endif
6305 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 && !st->need_parsing && pkt->size > 4) {
6306 if (ff_mpa_check_header(AV_RB32(pkt->data)) < 0)
6307 st->need_parsing = AVSTREAM_PARSE_FULL;
6308 }
6309 }
6310
6311 pkt->stream_index = sc->ffindex;
6312 pkt->dts = sample->timestamp;
6313 if (sample->flags & AVINDEX_DISCARD_FRAME) {
6314 pkt->flags |= AV_PKT_FLAG_DISCARD;
6315 }
6316 if (sc->ctts_data && sc->ctts_index < sc->ctts_count) {
6317 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
6318 /* update ctts context */
6319 sc->ctts_sample++;
6320 if (sc->ctts_index < sc->ctts_count &&
6321 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
6322 sc->ctts_index++;
6323 sc->ctts_sample = 0;
6324 }
6325 } else {
6326 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
6327 st->index_entries[sc->current_sample].timestamp : st->duration;
6328 pkt->duration = next_dts - pkt->dts;
6329 pkt->pts = pkt->dts;
6330 }
6331 if (st->discard == AVDISCARD_ALL)
6332 goto retry;
6333 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
6334 pkt->pos = sample->pos;
6335
6336 /* Multiple stsd handling. */
6337 if (sc->stsc_data) {
6338 /* Keep track of the stsc index for the given sample, then check
6339 * if the stsd index is different from the last used one. */
6340 sc->stsc_sample++;
6341 if (mov_stsc_index_valid(sc->stsc_index, sc->stsc_count) &&
6342 mov_get_stsc_samples(sc, sc->stsc_index) == sc->stsc_sample) {
6343 sc->stsc_index++;
6344 sc->stsc_sample = 0;
6345 /* Do not check indexes after a switch. */
6346 } else if (sc->stsc_data[sc->stsc_index].id > 0 &&
6347 sc->stsc_data[sc->stsc_index].id - 1 < sc->stsd_count &&
6348 sc->stsc_data[sc->stsc_index].id - 1 != sc->last_stsd_index) {
6349 ret = mov_change_extradata(sc, pkt);
6350 if (ret < 0)
6351 return ret;
6352 }
6353 }
6354
6355 if (mov->aax_mode)
6356 aax_filter(pkt->data, pkt->size, mov);
6357
6358 if (sc->cenc.aes_ctr) {
6359 ret = cenc_filter(mov, sc, current_index, pkt->data, pkt->size);
6360 if (ret) {
6361 return ret;
6362 }
6363 }
6364
6365 return 0;
6366}
6367
6368static int mov_seek_fragment(AVFormatContext *s, AVStream *st, int64_t timestamp)
6369{
6370 MOVContext *mov = s->priv_data;
6371 MOVStreamContext *sc = st->priv_data;
6372 int i, j;
6373
6374 if (!mov->fragment_index_complete)
6375 return 0;
6376
6377 for (i = 0; i < mov->fragment_index_count; i++) {
6378 if (mov->fragment_index_data[i]->track_id == st->id || !sc->has_sidx) {
6379 MOVFragmentIndex *index = mov->fragment_index_data[i];
6380 for (j = index->item_count - 1; j >= 0; j--) {
6381 if (index->items[j].time <= timestamp) {
6382 if (index->items[j].headers_read)
6383 return 0;
6384
6385 return mov_switch_root(s, index->items[j].moof_offset);
6386 }
6387 }
6388 }
6389 }
6390
6391 return 0;
6392}
6393
6394static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
6395{
6396 MOVStreamContext *sc = st->priv_data;
6397 int sample, time_sample;
6398 int i;
6399
6400 int ret = mov_seek_fragment(s, st, timestamp);
6401 if (ret < 0)
6402 return ret;
6403
6404 sample = av_index_search_timestamp(st, timestamp, flags);
6405 av_log(s, AV_LOG_TRACE, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
6406 if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
6407 sample = 0;
6408 if (sample < 0) /* not sure what to do */
6409 return AVERROR_INVALIDDATA;
6410 mov_current_sample_set(sc, sample);
6411 av_log(s, AV_LOG_TRACE, "stream %d, found sample %d\n", st->index, sc->current_sample);
6412 /* adjust ctts index */
6413 if (sc->ctts_data) {
6414 time_sample = 0;
6415 for (i = 0; i < sc->ctts_count; i++) {
6416 int next = time_sample + sc->ctts_data[i].count;
6417 if (next > sc->current_sample) {
6418 sc->ctts_index = i;
6419 sc->ctts_sample = sc->current_sample - time_sample;
6420 break;
6421 }
6422 time_sample = next;
6423 }
6424 }
6425
6426 /* adjust stsd index */
6427 time_sample = 0;
6428 for (i = 0; i < sc->stsc_count; i++) {
6429 int next = time_sample + mov_get_stsc_samples(sc, i);
6430 if (next > sc->current_sample) {
6431 sc->stsc_index = i;
6432 sc->stsc_sample = sc->current_sample - time_sample;
6433 break;
6434 }
6435 time_sample = next;
6436 }
6437
6438 return sample;
6439}
6440
6441static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
6442{
6443 MOVContext *mc = s->priv_data;
6444 AVStream *st;
6445 int sample;
6446 int i;
6447
6448 if (stream_index >= s->nb_streams)
6449 return AVERROR_INVALIDDATA;
6450
6451 st = s->streams[stream_index];
6452 sample = mov_seek_stream(s, st, sample_time, flags);
6453 if (sample < 0)
6454 return sample;
6455
6456 if (mc->seek_individually) {
6457 /* adjust seek timestamp to found sample timestamp */
6458 int64_t seek_timestamp = st->index_entries[sample].timestamp;
6459
6460 for (i = 0; i < s->nb_streams; i++) {
6461 int64_t timestamp;
6462 MOVStreamContext *sc = s->streams[i]->priv_data;
6463 st = s->streams[i];
6464 st->skip_samples = (sample_time <= 0) ? sc->start_pad : 0;
6465
6466 if (stream_index == i)
6467 continue;
6468
6469 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
6470 mov_seek_stream(s, st, timestamp, flags);
6471 }
6472 } else {
6473 for (i = 0; i < s->nb_streams; i++) {
6474 MOVStreamContext *sc;
6475 st = s->streams[i];
6476 sc = st->priv_data;
6477 mov_current_sample_set(sc, 0);
6478 }
6479 while (1) {
6480 MOVStreamContext *sc;
6481 AVIndexEntry *entry = mov_find_next_sample(s, &st);
6482 if (!entry)
6483 return AVERROR_INVALIDDATA;
6484 sc = st->priv_data;
6485 if (sc->ffindex == stream_index && sc->current_sample == sample)
6486 break;
6487 mov_current_sample_inc(sc);
6488 }
6489 }
6490 return 0;
6491}
6492
6493#define OFFSET(x) offsetof(MOVContext, x)
6494#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
6495static const AVOption mov_options[] = {
6496 {"use_absolute_path",
6497 "allow using absolute path when opening alias, this is a possible security issue",
6498 OFFSET(use_absolute_path), AV_OPT_TYPE_BOOL, {.i64 = 0},
6499 0, 1, FLAGS},
6500 {"seek_streams_individually",
6501 "Seek each stream individually to the to the closest point",
6502 OFFSET(seek_individually), AV_OPT_TYPE_BOOL, { .i64 = 1 },
6503 0, 1, FLAGS},
6504 {"ignore_editlist", "Ignore the edit list atom.", OFFSET(ignore_editlist), AV_OPT_TYPE_BOOL, {.i64 = 0},
6505 0, 1, FLAGS},
6506 {"advanced_editlist",
6507 "Modify the AVIndex according to the editlists. Use this option to decode in the order specified by the edits.",
6508 OFFSET(advanced_editlist), AV_OPT_TYPE_BOOL, {.i64 = 1},
6509 0, 1, FLAGS},
6510 {"ignore_chapters", "", OFFSET(ignore_chapters), AV_OPT_TYPE_BOOL, {.i64 = 0},
6511 0, 1, FLAGS},
6512 {"use_mfra_for",
6513 "use mfra for fragment timestamps",
6514 OFFSET(use_mfra_for), AV_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},
6515 -1, FF_MOV_FLAG_MFRA_PTS, FLAGS,
6516 "use_mfra_for"},
6517 {"auto", "auto", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_AUTO}, 0, 0,
6518 FLAGS, "use_mfra_for" },
6519 {"dts", "dts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_DTS}, 0, 0,
6520 FLAGS, "use_mfra_for" },
6521 {"pts", "pts", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_MFRA_PTS}, 0, 0,
6522 FLAGS, "use_mfra_for" },
6523 { "export_all", "Export unrecognized metadata entries", OFFSET(export_all),
6524 AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = FLAGS },
6525 { "export_xmp", "Export full XMP metadata", OFFSET(export_xmp),
6526 AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = FLAGS },
6527 { "activation_bytes", "Secret bytes for Audible AAX files", OFFSET(activation_bytes),
6528 AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_DECODING_PARAM },
6529 { "audible_fixed_key", // extracted from libAAX_SDK.so and AAXSDKWin.dll files!
6530 "Fixed key used for handling Audible AAX files", OFFSET(audible_fixed_key),
6531 AV_OPT_TYPE_BINARY, {.str="77214d4b196a87cd520045fd20a51d67"},
6532 .flags = AV_OPT_FLAG_DECODING_PARAM },
6533 { "decryption_key", "The media decryption key (hex)", OFFSET(decryption_key), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_DECODING_PARAM },
6534 { "enable_drefs", "Enable external track support.", OFFSET(enable_drefs), AV_OPT_TYPE_BOOL,
6535 {.i64 = 0}, 0, 1, FLAGS },
6536
6537 { NULL },
6538};
6539
6540static const AVClass mov_class = {
6541 .class_name = "mov,mp4,m4a,3gp,3g2,mj2",
6542 .item_name = av_default_item_name,
6543 .option = mov_options,
6544 .version = LIBAVUTIL_VERSION_INT,
6545};
6546
6547AVInputFormat ff_mov_demuxer = {
6548 .name = "mov,mp4,m4a,3gp,3g2,mj2",
6549 .long_name = NULL_IF_CONFIG_SMALL("QuickTime / MOV"),
6550 .priv_class = &mov_class,
6551 .priv_data_size = sizeof(MOVContext),
6552 .extensions = "mov,mp4,m4a,3gp,3g2,mj2",
6553 .read_probe = mov_probe,
6554 .read_header = mov_read_header,
6555 .read_packet = mov_read_packet,
6556 .read_close = mov_read_close,
6557 .read_seek = mov_read_seek,
6558 .flags = AVFMT_NO_BYTE_SEEK,
6559};
6560
generated by cgit at 2024-05-17 04:19:35 (GMT)