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0f03da1eb722d5c2cb668d384465b7a8ce230fb7
[libav.git] / libavformat / mov.c
1 /*
2 * MOV demuxer
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <limits.h>
24
25 //#define DEBUG
26 //#define DEBUG_METADATA
27 //#define MOV_EXPORT_ALL_METADATA
28
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/avstring.h"
31 #include "avformat.h"
32 #include "riff.h"
33 #include "isom.h"
34 #include "libavcodec/mpeg4audio.h"
35 #include "libavcodec/mpegaudiodata.h"
36 #include "libavcodec/get_bits.h"
37
38 #if CONFIG_ZLIB
39 #include <zlib.h>
40 #endif
41
42 /*
43 * First version by Francois Revol revol@free.fr
44 * Seek function by Gael Chardon gael.dev@4now.net
45 *
46 * Features and limitations:
47 * - reads most of the QT files I have (at least the structure),
48 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
49 * - the code is quite ugly... maybe I won't do it recursive next time :-)
50 *
51 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
52 * when coding this :) (it's a writer anyway)
53 *
54 * Reference documents:
55 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
56 * Apple:
57 * http://developer.apple.com/documentation/QuickTime/QTFF/
58 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
59 * QuickTime is a trademark of Apple (AFAIK :))
60 */
61
62 #include "qtpalette.h"
63
64
65 #undef NDEBUG
66 #include <assert.h>
67
68 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
69
70 /* those functions parse an atom */
71 /* return code:
72 0: continue to parse next atom
73 <0: error occurred, exit
74 */
75 /* links atom IDs to parse functions */
76 typedef struct MOVParseTableEntry {
77 uint32_t type;
78 int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
79 } MOVParseTableEntry;
80
81 static const MOVParseTableEntry mov_default_parse_table[];
82
83 static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
84 {
85 char buf[16];
86
87 get_be16(pb); // unknown
88 snprintf(buf, sizeof(buf), "%d", get_be16(pb));
89 av_metadata_set(&c->fc->metadata, "track", buf);
90
91 get_be16(pb); // total tracks
92
93 return 0;
94 }
95
96 static const uint32_t mac_to_unicode[128] = {
97 0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
98 0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
99 0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
100 0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
101 0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
102 0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
103 0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
104 0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
105 0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
106 0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
107 0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
108 0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
109 0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
110 0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
111 0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
112 0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
113 };
114
115 static int mov_read_mac_string(MOVContext *c, ByteIOContext *pb, int len,
116 char *dst, int dstlen)
117 {
118 char *p = dst;
119 char *end = dst+dstlen-1;
120 int i;
121
122 for (i = 0; i < len; i++) {
123 uint8_t t, c = get_byte(pb);
124 if (c < 0x80 && p < end)
125 *p++ = c;
126 else
127 PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
128 }
129 *p = 0;
130 return p - dst;
131 }
132
133 static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
134 {
135 #ifdef MOV_EXPORT_ALL_METADATA
136 char tmp_key[5];
137 #endif
138 char str[1024], key2[16], language[4] = {0};
139 const char *key = NULL;
140 uint16_t str_size, langcode = 0;
141 uint32_t data_type = 0;
142 int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
143
144 switch (atom.type) {
145 case MKTAG(0xa9,'n','a','m'): key = "title"; break;
146 case MKTAG(0xa9,'a','u','t'):
147 case MKTAG(0xa9,'A','R','T'): key = "author"; break;
148 case MKTAG(0xa9,'w','r','t'): key = "composer"; break;
149 case MKTAG( 'c','p','r','t'):
150 case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
151 case MKTAG(0xa9,'c','m','t'):
152 case MKTAG(0xa9,'i','n','f'): key = "comment"; break;
153 case MKTAG(0xa9,'a','l','b'): key = "album"; break;
154 case MKTAG(0xa9,'d','a','y'): key = "date"; break;
155 case MKTAG(0xa9,'g','e','n'): key = "genre"; break;
156 case MKTAG(0xa9,'t','o','o'):
157 case MKTAG(0xa9,'e','n','c'): key = "encoder"; break;
158 case MKTAG( 'd','e','s','c'): key = "description";break;
159 case MKTAG( 'l','d','e','s'): key = "synopsis"; break;
160 case MKTAG( 't','v','s','h'): key = "show"; break;
161 case MKTAG( 't','v','e','n'): key = "episode_id";break;
162 case MKTAG( 't','v','n','n'): key = "network"; break;
163 case MKTAG( 't','r','k','n'): key = "track";
164 parse = mov_metadata_trkn; break;
165 }
166
167 if (c->itunes_metadata && atom.size > 8) {
168 int data_size = get_be32(pb);
169 int tag = get_le32(pb);
170 if (tag == MKTAG('d','a','t','a')) {
171 data_type = get_be32(pb); // type
172 get_be32(pb); // unknown
173 str_size = data_size - 16;
174 atom.size -= 16;
175 } else return 0;
176 } else if (atom.size > 4 && key && !c->itunes_metadata) {
177 str_size = get_be16(pb); // string length
178 langcode = get_be16(pb);
179 ff_mov_lang_to_iso639(langcode, language);
180 atom.size -= 4;
181 } else
182 str_size = atom.size;
183
184 #ifdef MOV_EXPORT_ALL_METADATA
185 if (!key) {
186 snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
187 key = tmp_key;
188 }
189 #endif
190
191 if (!key)
192 return 0;
193 if (atom.size < 0)
194 return -1;
195
196 str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
197
198 if (parse)
199 parse(c, pb, str_size);
200 else {
201 if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
202 mov_read_mac_string(c, pb, str_size, str, sizeof(str));
203 } else {
204 get_buffer(pb, str, str_size);
205 str[str_size] = 0;
206 }
207 av_metadata_set(&c->fc->metadata, key, str);
208 if (*language && strcmp(language, "und")) {
209 snprintf(key2, sizeof(key2), "%s-%s", key, language);
210 av_metadata_set(&c->fc->metadata, key2, str);
211 }
212 }
213 #ifdef DEBUG_METADATA
214 av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
215 av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
216 key, str, (char*)&atom.type, str_size, atom.size);
217 #endif
218
219 return 0;
220 }
221
222 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
223 {
224 int64_t total_size = 0;
225 MOVAtom a;
226 int i;
227
228 if (atom.size < 0)
229 atom.size = INT64_MAX;
230 while (total_size + 8 < atom.size && !url_feof(pb)) {
231 int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
232 a.size = atom.size;
233 a.type=0;
234 if(atom.size >= 8) {
235 a.size = get_be32(pb);
236 a.type = get_le32(pb);
237 }
238 total_size += 8;
239 dprintf(c->fc, "type: %08x %.4s sz: %"PRIx64" %"PRIx64" %"PRIx64"\n",
240 a.type, (char*)&a.type, a.size, atom.size, total_size);
241 if (a.size == 1) { /* 64 bit extended size */
242 a.size = get_be64(pb) - 8;
243 total_size += 8;
244 }
245 if (a.size == 0) {
246 a.size = atom.size - total_size;
247 if (a.size <= 8)
248 break;
249 }
250 a.size -= 8;
251 if(a.size < 0)
252 break;
253 a.size = FFMIN(a.size, atom.size - total_size);
254
255 for (i = 0; mov_default_parse_table[i].type; i++)
256 if (mov_default_parse_table[i].type == a.type) {
257 parse = mov_default_parse_table[i].parse;
258 break;
259 }
260
261 // container is user data
262 if (!parse && (atom.type == MKTAG('u','d','t','a') ||
263 atom.type == MKTAG('i','l','s','t')))
264 parse = mov_read_udta_string;
265
266 if (!parse) { /* skip leaf atoms data */
267 url_fskip(pb, a.size);
268 } else {
269 int64_t start_pos = url_ftell(pb);
270 int64_t left;
271 int err = parse(c, pb, a);
272 if (err < 0)
273 return err;
274 if (c->found_moov && c->found_mdat &&
275 (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
276 return 0;
277 left = a.size - url_ftell(pb) + start_pos;
278 if (left > 0) /* skip garbage at atom end */
279 url_fskip(pb, left);
280 }
281
282 total_size += a.size;
283 }
284
285 if (total_size < atom.size && atom.size < 0x7ffff)
286 url_fskip(pb, atom.size - total_size);
287
288 return 0;
289 }
290
291 static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
292 {
293 AVStream *st;
294 MOVStreamContext *sc;
295 int entries, i, j;
296
297 if (c->fc->nb_streams < 1)
298 return 0;
299 st = c->fc->streams[c->fc->nb_streams-1];
300 sc = st->priv_data;
301
302 get_be32(pb); // version + flags
303 entries = get_be32(pb);
304 if (entries >= UINT_MAX / sizeof(*sc->drefs))
305 return -1;
306 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
307 if (!sc->drefs)
308 return AVERROR(ENOMEM);
309 sc->drefs_count = entries;
310
311 for (i = 0; i < sc->drefs_count; i++) {
312 MOVDref *dref = &sc->drefs[i];
313 uint32_t size = get_be32(pb);
314 int64_t next = url_ftell(pb) + size - 4;
315
316 dref->type = get_le32(pb);
317 get_be32(pb); // version + flags
318 dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
319
320 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
321 /* macintosh alias record */
322 uint16_t volume_len, len;
323 int16_t type;
324
325 url_fskip(pb, 10);
326
327 volume_len = get_byte(pb);
328 volume_len = FFMIN(volume_len, 27);
329 get_buffer(pb, dref->volume, 27);
330 dref->volume[volume_len] = 0;
331 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
332
333 url_fskip(pb, 12);
334
335 len = get_byte(pb);
336 len = FFMIN(len, 63);
337 get_buffer(pb, dref->filename, 63);
338 dref->filename[len] = 0;
339 av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
340
341 url_fskip(pb, 16);
342
343 /* read next level up_from_alias/down_to_target */
344 dref->nlvl_from = get_be16(pb);
345 dref->nlvl_to = get_be16(pb);
346 av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
347 dref->nlvl_from, dref->nlvl_to);
348
349 url_fskip(pb, 16);
350
351 for (type = 0; type != -1 && url_ftell(pb) < next; ) {
352 type = get_be16(pb);
353 len = get_be16(pb);
354 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
355 if (len&1)
356 len += 1;
357 if (type == 2) { // absolute path
358 av_free(dref->path);
359 dref->path = av_mallocz(len+1);
360 if (!dref->path)
361 return AVERROR(ENOMEM);
362 get_buffer(pb, dref->path, len);
363 if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
364 len -= volume_len;
365 memmove(dref->path, dref->path+volume_len, len);
366 dref->path[len] = 0;
367 }
368 for (j = 0; j < len; j++)
369 if (dref->path[j] == ':')
370 dref->path[j] = '/';
371 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
372 } else if (type == 0) { // directory name
373 av_free(dref->dir);
374 dref->dir = av_malloc(len+1);
375 if (!dref->dir)
376 return AVERROR(ENOMEM);
377 get_buffer(pb, dref->dir, len);
378 dref->dir[len] = 0;
379 for (j = 0; j < len; j++)
380 if (dref->dir[j] == ':')
381 dref->dir[j] = '/';
382 av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
383 } else
384 url_fskip(pb, len);
385 }
386 }
387 url_fseek(pb, next, SEEK_SET);
388 }
389 return 0;
390 }
391
392 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
393 {
394 AVStream *st;
395 uint32_t type;
396 uint32_t ctype;
397
398 if (c->fc->nb_streams < 1) // meta before first trak
399 return 0;
400
401 st = c->fc->streams[c->fc->nb_streams-1];
402
403 get_byte(pb); /* version */
404 get_be24(pb); /* flags */
405
406 /* component type */
407 ctype = get_le32(pb);
408 type = get_le32(pb); /* component subtype */
409
410 dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
411 dprintf(c->fc, "stype= %.4s\n", (char*)&type);
412
413 if (type == MKTAG('v','i','d','e'))
414 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
415 else if(type == MKTAG('s','o','u','n'))
416 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
417 else if(type == MKTAG('m','1','a',' '))
418 st->codec->codec_id = CODEC_ID_MP2;
419 else if(type == MKTAG('s','u','b','p'))
420 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
421
422 get_be32(pb); /* component manufacture */
423 get_be32(pb); /* component flags */
424 get_be32(pb); /* component flags mask */
425
426 return 0;
427 }
428
429 int ff_mp4_read_descr_len(ByteIOContext *pb)
430 {
431 int len = 0;
432 int count = 4;
433 while (count--) {
434 int c = get_byte(pb);
435 len = (len << 7) | (c & 0x7f);
436 if (!(c & 0x80))
437 break;
438 }
439 return len;
440 }
441
442 static int mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag)
443 {
444 int len;
445 *tag = get_byte(pb);
446 len = ff_mp4_read_descr_len(pb);
447 dprintf(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
448 return len;
449 }
450
451 #define MP4ESDescrTag 0x03
452 #define MP4DecConfigDescrTag 0x04
453 #define MP4DecSpecificDescrTag 0x05
454
455 static const AVCodecTag mp4_audio_types[] = {
456 { CODEC_ID_MP3ON4, AOT_PS }, /* old mp3on4 draft */
457 { CODEC_ID_MP3ON4, AOT_L1 }, /* layer 1 */
458 { CODEC_ID_MP3ON4, AOT_L2 }, /* layer 2 */
459 { CODEC_ID_MP3ON4, AOT_L3 }, /* layer 3 */
460 { CODEC_ID_MP4ALS, AOT_ALS }, /* MPEG-4 ALS */
461 { CODEC_ID_NONE, AOT_NULL },
462 };
463
464 int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
465 {
466 AVStream *st;
467 int tag, len;
468
469 if (fc->nb_streams < 1)
470 return 0;
471 st = fc->streams[fc->nb_streams-1];
472
473 get_be32(pb); /* version + flags */
474 len = mp4_read_descr(fc, pb, &tag);
475 if (tag == MP4ESDescrTag) {
476 get_be16(pb); /* ID */
477 get_byte(pb); /* priority */
478 } else
479 get_be16(pb); /* ID */
480
481 len = mp4_read_descr(fc, pb, &tag);
482 if (tag == MP4DecConfigDescrTag) {
483 int object_type_id = get_byte(pb);
484 get_byte(pb); /* stream type */
485 get_be24(pb); /* buffer size db */
486 get_be32(pb); /* max bitrate */
487 get_be32(pb); /* avg bitrate */
488
489 st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
490 dprintf(fc, "esds object type id 0x%02x\n", object_type_id);
491 len = mp4_read_descr(fc, pb, &tag);
492 if (tag == MP4DecSpecificDescrTag) {
493 dprintf(fc, "Specific MPEG4 header len=%d\n", len);
494 if((uint64_t)len > (1<<30))
495 return -1;
496 st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
497 if (!st->codec->extradata)
498 return AVERROR(ENOMEM);
499 get_buffer(pb, st->codec->extradata, len);
500 st->codec->extradata_size = len;
501 if (st->codec->codec_id == CODEC_ID_AAC) {
502 MPEG4AudioConfig cfg;
503 ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
504 st->codec->extradata_size);
505 st->codec->channels = cfg.channels;
506 if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
507 st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
508 else
509 st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
510 dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
511 "sample rate %d ext sample rate %d\n", st->codec->channels,
512 cfg.object_type, cfg.ext_object_type,
513 cfg.sample_rate, cfg.ext_sample_rate);
514 if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
515 cfg.object_type)))
516 st->codec->codec_id = CODEC_ID_AAC;
517 }
518 }
519 }
520 return 0;
521 }
522
523 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
524 {
525 return ff_mov_read_esds(c->fc, pb, atom);
526 }
527
528 static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
529 {
530 const int num = get_be32(pb);
531 const int den = get_be32(pb);
532 AVStream *st;
533
534 if (c->fc->nb_streams < 1)
535 return 0;
536 st = c->fc->streams[c->fc->nb_streams-1];
537
538 if (den != 0) {
539 if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
540 (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
541 av_log(c->fc, AV_LOG_WARNING,
542 "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
543 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
544 st->sample_aspect_ratio.num = num;
545 st->sample_aspect_ratio.den = den;
546 }
547 return 0;
548 }
549
550 /* this atom contains actual media data */
551 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
552 {
553 if(atom.size == 0) /* wrong one (MP4) */
554 return 0;
555 c->found_mdat=1;
556 return 0; /* now go for moov */
557 }
558
559 /* read major brand, minor version and compatible brands and store them as metadata */
560 static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
561 {
562 uint32_t minor_ver;
563 int comp_brand_size;
564 char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
565 char* comp_brands_str;
566 uint8_t type[5] = {0};
567
568 get_buffer(pb, type, 4);
569 if (strcmp(type, "qt "))
570 c->isom = 1;
571 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
572 av_metadata_set(&c->fc->metadata, "major_brand", type);
573 minor_ver = get_be32(pb); /* minor version */
574 snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
575 av_metadata_set(&c->fc->metadata, "minor_version", minor_ver_str);
576
577 comp_brand_size = atom.size - 8;
578 if (comp_brand_size < 0)
579 return -1;
580 comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
581 if (!comp_brands_str)
582 return AVERROR(ENOMEM);
583 get_buffer(pb, comp_brands_str, comp_brand_size);
584 comp_brands_str[comp_brand_size] = 0;
585 av_metadata_set(&c->fc->metadata, "compatible_brands", comp_brands_str);
586 av_freep(&comp_brands_str);
587
588 return 0;
589 }
590
591 /* this atom should contain all header atoms */
592 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
593 {
594 if (mov_read_default(c, pb, atom) < 0)
595 return -1;
596 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
597 /* so we don't parse the whole file if over a network */
598 c->found_moov=1;
599 return 0; /* now go for mdat */
600 }
601
602 static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
603 {
604 c->fragment.moof_offset = url_ftell(pb) - 8;
605 dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
606 return mov_read_default(c, pb, atom);
607 }
608
609 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
610 {
611 AVStream *st;
612 MOVStreamContext *sc;
613 int version;
614 char language[4] = {0};
615 unsigned lang;
616
617 if (c->fc->nb_streams < 1)
618 return 0;
619 st = c->fc->streams[c->fc->nb_streams-1];
620 sc = st->priv_data;
621
622 version = get_byte(pb);
623 if (version > 1)
624 return -1; /* unsupported */
625
626 get_be24(pb); /* flags */
627 if (version == 1) {
628 get_be64(pb);
629 get_be64(pb);
630 } else {
631 get_be32(pb); /* creation time */
632 get_be32(pb); /* modification time */
633 }
634
635 sc->time_scale = get_be32(pb);
636 st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
637
638 lang = get_be16(pb); /* language */
639 if (ff_mov_lang_to_iso639(lang, language))
640 av_metadata_set(&st->metadata, "language", language);
641 get_be16(pb); /* quality */
642
643 return 0;
644 }
645
646 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
647 {
648 int version = get_byte(pb); /* version */
649 get_be24(pb); /* flags */
650
651 if (version == 1) {
652 get_be64(pb);
653 get_be64(pb);
654 } else {
655 get_be32(pb); /* creation time */
656 get_be32(pb); /* modification time */
657 }
658 c->time_scale = get_be32(pb); /* time scale */
659
660 dprintf(c->fc, "time scale = %i\n", c->time_scale);
661
662 c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
663 get_be32(pb); /* preferred scale */
664
665 get_be16(pb); /* preferred volume */
666
667 url_fskip(pb, 10); /* reserved */
668
669 url_fskip(pb, 36); /* display matrix */
670
671 get_be32(pb); /* preview time */
672 get_be32(pb); /* preview duration */
673 get_be32(pb); /* poster time */
674 get_be32(pb); /* selection time */
675 get_be32(pb); /* selection duration */
676 get_be32(pb); /* current time */
677 get_be32(pb); /* next track ID */
678
679 return 0;
680 }
681
682 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
683 {
684 AVStream *st;
685
686 if (c->fc->nb_streams < 1)
687 return 0;
688 st = c->fc->streams[c->fc->nb_streams-1];
689
690 if((uint64_t)atom.size > (1<<30))
691 return -1;
692
693 // currently SVQ3 decoder expect full STSD header - so let's fake it
694 // this should be fixed and just SMI header should be passed
695 av_free(st->codec->extradata);
696 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
697 if (!st->codec->extradata)
698 return AVERROR(ENOMEM);
699 st->codec->extradata_size = 0x5a + atom.size;
700 memcpy(st->codec->extradata, "SVQ3", 4); // fake
701 get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
702 dprintf(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
703 return 0;
704 }
705
706 static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
707 {
708 AVStream *st;
709 int little_endian;
710
711 if (c->fc->nb_streams < 1)
712 return 0;
713 st = c->fc->streams[c->fc->nb_streams-1];
714
715 little_endian = get_be16(pb);
716 dprintf(c->fc, "enda %d\n", little_endian);
717 if (little_endian == 1) {
718 switch (st->codec->codec_id) {
719 case CODEC_ID_PCM_S24BE:
720 st->codec->codec_id = CODEC_ID_PCM_S24LE;
721 break;
722 case CODEC_ID_PCM_S32BE:
723 st->codec->codec_id = CODEC_ID_PCM_S32LE;
724 break;
725 case CODEC_ID_PCM_F32BE:
726 st->codec->codec_id = CODEC_ID_PCM_F32LE;
727 break;
728 case CODEC_ID_PCM_F64BE:
729 st->codec->codec_id = CODEC_ID_PCM_F64LE;
730 break;
731 default:
732 break;
733 }
734 }
735 return 0;
736 }
737
738 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
739 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
740 {
741 AVStream *st;
742 uint64_t size;
743 uint8_t *buf;
744
745 if (c->fc->nb_streams < 1) // will happen with jp2 files
746 return 0;
747 st= c->fc->streams[c->fc->nb_streams-1];
748 size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
749 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
750 return -1;
751 buf= av_realloc(st->codec->extradata, size);
752 if(!buf)
753 return -1;
754 st->codec->extradata= buf;
755 buf+= st->codec->extradata_size;
756 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
757 AV_WB32( buf , atom.size + 8);
758 AV_WL32( buf + 4, atom.type);
759 get_buffer(pb, buf + 8, atom.size);
760 return 0;
761 }
762
763 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
764 {
765 AVStream *st;
766
767 if (c->fc->nb_streams < 1)
768 return 0;
769 st = c->fc->streams[c->fc->nb_streams-1];
770
771 if((uint64_t)atom.size > (1<<30))
772 return -1;
773
774 if (st->codec->codec_id == CODEC_ID_QDM2) {
775 // pass all frma atom to codec, needed at least for QDM2
776 av_free(st->codec->extradata);
777 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
778 if (!st->codec->extradata)
779 return AVERROR(ENOMEM);
780 st->codec->extradata_size = atom.size;
781 get_buffer(pb, st->codec->extradata, atom.size);
782 } else if (atom.size > 8) { /* to read frma, esds atoms */
783 if (mov_read_default(c, pb, atom) < 0)
784 return -1;
785 } else
786 url_fskip(pb, atom.size);
787 return 0;
788 }
789
790 /**
791 * This function reads atom content and puts data in extradata without tag
792 * nor size unlike mov_read_extradata.
793 */
794 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
795 {
796 AVStream *st;
797
798 if (c->fc->nb_streams < 1)
799 return 0;
800 st = c->fc->streams[c->fc->nb_streams-1];
801
802 if((uint64_t)atom.size > (1<<30))
803 return -1;
804
805 av_free(st->codec->extradata);
806 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
807 if (!st->codec->extradata)
808 return AVERROR(ENOMEM);
809 st->codec->extradata_size = atom.size;
810 get_buffer(pb, st->codec->extradata, atom.size);
811 return 0;
812 }
813
814 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
815 {
816 AVStream *st;
817 MOVStreamContext *sc;
818 unsigned int i, entries;
819
820 if (c->fc->nb_streams < 1)
821 return 0;
822 st = c->fc->streams[c->fc->nb_streams-1];
823 sc = st->priv_data;
824
825 get_byte(pb); /* version */
826 get_be24(pb); /* flags */
827
828 entries = get_be32(pb);
829
830 if(entries >= UINT_MAX/sizeof(int64_t))
831 return -1;
832
833 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
834 if (!sc->chunk_offsets)
835 return AVERROR(ENOMEM);
836 sc->chunk_count = entries;
837
838 if (atom.type == MKTAG('s','t','c','o'))
839 for(i=0; i<entries; i++)
840 sc->chunk_offsets[i] = get_be32(pb);
841 else if (atom.type == MKTAG('c','o','6','4'))
842 for(i=0; i<entries; i++)
843 sc->chunk_offsets[i] = get_be64(pb);
844 else
845 return -1;
846
847 return 0;
848 }
849
850 /**
851 * Compute codec id for 'lpcm' tag.
852 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
853 */
854 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
855 {
856 if (flags & 1) { // floating point
857 if (flags & 2) { // big endian
858 if (bps == 32) return CODEC_ID_PCM_F32BE;
859 else if (bps == 64) return CODEC_ID_PCM_F64BE;
860 } else {
861 if (bps == 32) return CODEC_ID_PCM_F32LE;
862 else if (bps == 64) return CODEC_ID_PCM_F64LE;
863 }
864 } else {
865 if (flags & 2) {
866 if (bps == 8)
867 // signed integer
868 if (flags & 4) return CODEC_ID_PCM_S8;
869 else return CODEC_ID_PCM_U8;
870 else if (bps == 16) return CODEC_ID_PCM_S16BE;
871 else if (bps == 24) return CODEC_ID_PCM_S24BE;
872 else if (bps == 32) return CODEC_ID_PCM_S32BE;
873 } else {
874 if (bps == 8)
875 if (flags & 4) return CODEC_ID_PCM_S8;
876 else return CODEC_ID_PCM_U8;
877 else if (bps == 16) return CODEC_ID_PCM_S16LE;
878 else if (bps == 24) return CODEC_ID_PCM_S24LE;
879 else if (bps == 32) return CODEC_ID_PCM_S32LE;
880 }
881 }
882 return CODEC_ID_NONE;
883 }
884
885 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
886 {
887 AVStream *st;
888 MOVStreamContext *sc;
889 int j, entries, pseudo_stream_id;
890
891 if (c->fc->nb_streams < 1)
892 return 0;
893 st = c->fc->streams[c->fc->nb_streams-1];
894 sc = st->priv_data;
895
896 get_byte(pb); /* version */
897 get_be24(pb); /* flags */
898
899 entries = get_be32(pb);
900
901 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
902 //Parsing Sample description table
903 enum CodecID id;
904 int dref_id = 1;
905 MOVAtom a = { 0 };
906 int64_t start_pos = url_ftell(pb);
907 int size = get_be32(pb); /* size */
908 uint32_t format = get_le32(pb); /* data format */
909
910 if (size >= 16) {
911 get_be32(pb); /* reserved */
912 get_be16(pb); /* reserved */
913 dref_id = get_be16(pb);
914 }
915
916 if (st->codec->codec_tag &&
917 st->codec->codec_tag != format &&
918 (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
919 : st->codec->codec_tag != MKTAG('j','p','e','g'))
920 ){
921 /* Multiple fourcc, we skip JPEG. This is not correct, we should
922 * export it as a separate AVStream but this needs a few changes
923 * in the MOV demuxer, patch welcome. */
924 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
925 url_fskip(pb, size - (url_ftell(pb) - start_pos));
926 continue;
927 }
928 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
929 sc->dref_id= dref_id;
930
931 st->codec->codec_tag = format;
932 id = ff_codec_get_id(codec_movaudio_tags, format);
933 if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
934 id = ff_codec_get_id(ff_codec_wav_tags, bswap_32(format)&0xFFFF);
935
936 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
937 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
938 } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
939 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
940 id = ff_codec_get_id(codec_movvideo_tags, format);
941 if (id <= 0)
942 id = ff_codec_get_id(ff_codec_bmp_tags, format);
943 if (id > 0)
944 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
945 else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
946 id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
947 if(id > 0)
948 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
949 }
950 }
951
952 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
953 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
954 (format >> 24) & 0xff, st->codec->codec_type);
955
956 if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
957 unsigned int color_depth, len;
958 int color_greyscale;
959
960 st->codec->codec_id = id;
961 get_be16(pb); /* version */
962 get_be16(pb); /* revision level */
963 get_be32(pb); /* vendor */
964 get_be32(pb); /* temporal quality */
965 get_be32(pb); /* spatial quality */
966
967 st->codec->width = get_be16(pb); /* width */
968 st->codec->height = get_be16(pb); /* height */
969
970 get_be32(pb); /* horiz resolution */
971 get_be32(pb); /* vert resolution */
972 get_be32(pb); /* data size, always 0 */
973 get_be16(pb); /* frames per samples */
974
975 len = get_byte(pb); /* codec name, pascal string */
976 if (len > 31)
977 len = 31;
978 mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
979 if (len < 31)
980 url_fskip(pb, 31 - len);
981 /* codec_tag YV12 triggers an UV swap in rawdec.c */
982 if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
983 st->codec->codec_tag=MKTAG('I', '4', '2', '0');
984
985 st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
986 st->codec->color_table_id = get_be16(pb); /* colortable id */
987 dprintf(c->fc, "depth %d, ctab id %d\n",
988 st->codec->bits_per_coded_sample, st->codec->color_table_id);
989 /* figure out the palette situation */
990 color_depth = st->codec->bits_per_coded_sample & 0x1F;
991 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
992
993 /* if the depth is 2, 4, or 8 bpp, file is palettized */
994 if ((color_depth == 2) || (color_depth == 4) ||
995 (color_depth == 8)) {
996 /* for palette traversal */
997 unsigned int color_start, color_count, color_end;
998 unsigned char r, g, b;
999
1000 st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1001 if (color_greyscale) {
1002 int color_index, color_dec;
1003 /* compute the greyscale palette */
1004 st->codec->bits_per_coded_sample = color_depth;
1005 color_count = 1 << color_depth;
1006 color_index = 255;
1007 color_dec = 256 / (color_count - 1);
1008 for (j = 0; j < color_count; j++) {
1009 r = g = b = color_index;
1010 st->codec->palctrl->palette[j] =
1011 (r << 16) | (g << 8) | (b);
1012 color_index -= color_dec;
1013 if (color_index < 0)
1014 color_index = 0;
1015 }
1016 } else if (st->codec->color_table_id) {
1017 const uint8_t *color_table;
1018 /* if flag bit 3 is set, use the default palette */
1019 color_count = 1 << color_depth;
1020 if (color_depth == 2)
1021 color_table = ff_qt_default_palette_4;
1022 else if (color_depth == 4)
1023 color_table = ff_qt_default_palette_16;
1024 else
1025 color_table = ff_qt_default_palette_256;
1026
1027 for (j = 0; j < color_count; j++) {
1028 r = color_table[j * 3 + 0];
1029 g = color_table[j * 3 + 1];
1030 b = color_table[j * 3 + 2];
1031 st->codec->palctrl->palette[j] =
1032 (r << 16) | (g << 8) | (b);
1033 }
1034 } else {
1035 /* load the palette from the file */
1036 color_start = get_be32(pb);
1037 color_count = get_be16(pb);
1038 color_end = get_be16(pb);
1039 if ((color_start <= 255) &&
1040 (color_end <= 255)) {
1041 for (j = color_start; j <= color_end; j++) {
1042 /* each R, G, or B component is 16 bits;
1043 * only use the top 8 bits; skip alpha bytes
1044 * up front */
1045 get_byte(pb);
1046 get_byte(pb);
1047 r = get_byte(pb);
1048 get_byte(pb);
1049 g = get_byte(pb);
1050 get_byte(pb);
1051 b = get_byte(pb);
1052 get_byte(pb);
1053 st->codec->palctrl->palette[j] =
1054 (r << 16) | (g << 8) | (b);
1055 }
1056 }
1057 }
1058 st->codec->palctrl->palette_changed = 1;
1059 }
1060 } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1061 int bits_per_sample, flags;
1062 uint16_t version = get_be16(pb);
1063
1064 st->codec->codec_id = id;
1065 get_be16(pb); /* revision level */
1066 get_be32(pb); /* vendor */
1067
1068 st->codec->channels = get_be16(pb); /* channel count */
1069 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
1070 st->codec->bits_per_coded_sample = get_be16(pb); /* sample size */
1071
1072 sc->audio_cid = get_be16(pb);
1073 get_be16(pb); /* packet size = 0 */
1074
1075 st->codec->sample_rate = ((get_be32(pb) >> 16));
1076
1077 //Read QT version 1 fields. In version 0 these do not exist.
1078 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
1079 if(!c->isom) {
1080 if(version==1) {
1081 sc->samples_per_frame = get_be32(pb);
1082 get_be32(pb); /* bytes per packet */
1083 sc->bytes_per_frame = get_be32(pb);
1084 get_be32(pb); /* bytes per sample */
1085 } else if(version==2) {
1086 get_be32(pb); /* sizeof struct only */
1087 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
1088 st->codec->channels = get_be32(pb);
1089 get_be32(pb); /* always 0x7F000000 */
1090 st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
1091 flags = get_be32(pb); /* lpcm format specific flag */
1092 sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
1093 sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1094 if (format == MKTAG('l','p','c','m'))
1095 st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1096 }
1097 }
1098
1099 switch (st->codec->codec_id) {
1100 case CODEC_ID_PCM_S8:
1101 case CODEC_ID_PCM_U8:
1102 if (st->codec->bits_per_coded_sample == 16)
1103 st->codec->codec_id = CODEC_ID_PCM_S16BE;
1104 break;
1105 case CODEC_ID_PCM_S16LE:
1106 case CODEC_ID_PCM_S16BE:
1107 if (st->codec->bits_per_coded_sample == 8)
1108 st->codec->codec_id = CODEC_ID_PCM_S8;
1109 else if (st->codec->bits_per_coded_sample == 24)
1110 st->codec->codec_id =
1111 st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1112 CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1113 break;
1114 /* set values for old format before stsd version 1 appeared */
1115 case CODEC_ID_MACE3:
1116 sc->samples_per_frame = 6;
1117 sc->bytes_per_frame = 2*st->codec->channels;
1118 break;
1119 case CODEC_ID_MACE6:
1120 sc->samples_per_frame = 6;
1121 sc->bytes_per_frame = 1*st->codec->channels;
1122 break;
1123 case CODEC_ID_ADPCM_IMA_QT:
1124 sc->samples_per_frame = 64;
1125 sc->bytes_per_frame = 34*st->codec->channels;
1126 break;
1127 case CODEC_ID_GSM:
1128 sc->samples_per_frame = 160;
1129 sc->bytes_per_frame = 33;
1130 break;
1131 default:
1132 break;
1133 }
1134
1135 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1136 if (bits_per_sample) {
1137 st->codec->bits_per_coded_sample = bits_per_sample;
1138 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1139 }
1140 } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1141 // ttxt stsd contains display flags, justification, background
1142 // color, fonts, and default styles, so fake an atom to read it
1143 MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1144 if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1145 mov_read_glbl(c, pb, fake_atom);
1146 st->codec->codec_id= id;
1147 st->codec->width = sc->width;
1148 st->codec->height = sc->height;
1149 } else {
1150 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1151 url_fskip(pb, size - (url_ftell(pb) - start_pos));
1152 }
1153 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1154 a.size = size - (url_ftell(pb) - start_pos);
1155 if (a.size > 8) {
1156 if (mov_read_default(c, pb, a) < 0)
1157 return -1;
1158 } else if (a.size > 0)
1159 url_fskip(pb, a.size);
1160 }
1161
1162 if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1163 st->codec->sample_rate= sc->time_scale;
1164
1165 /* special codec parameters handling */
1166 switch (st->codec->codec_id) {
1167 #if CONFIG_DV_DEMUXER
1168 case CODEC_ID_DVAUDIO:
1169 c->dv_fctx = avformat_alloc_context();
1170 c->dv_demux = dv_init_demux(c->dv_fctx);
1171 if (!c->dv_demux) {
1172 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1173 return -1;
1174 }
1175 sc->dv_audio_container = 1;
1176 st->codec->codec_id = CODEC_ID_PCM_S16LE;
1177 break;
1178 #endif
1179 /* no ifdef since parameters are always those */
1180 case CODEC_ID_QCELP:
1181 // force sample rate for qcelp when not stored in mov
1182 if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1183 st->codec->sample_rate = 8000;
1184 st->codec->frame_size= 160;
1185 st->codec->channels= 1; /* really needed */
1186 break;
1187 case CODEC_ID_AMR_NB:
1188 case CODEC_ID_AMR_WB:
1189 st->codec->frame_size= sc->samples_per_frame;
1190 st->codec->channels= 1; /* really needed */
1191 /* force sample rate for amr, stsd in 3gp does not store sample rate */
1192 if (st->codec->codec_id == CODEC_ID_AMR_NB)
1193 st->codec->sample_rate = 8000;
1194 else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1195 st->codec->sample_rate = 16000;
1196 break;
1197 case CODEC_ID_MP2:
1198 case CODEC_ID_MP3:
1199 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1200 st->need_parsing = AVSTREAM_PARSE_FULL;
1201 break;
1202 case CODEC_ID_GSM:
1203 case CODEC_ID_ADPCM_MS:
1204 case CODEC_ID_ADPCM_IMA_WAV:
1205 st->codec->block_align = sc->bytes_per_frame;
1206 break;
1207 case CODEC_ID_ALAC:
1208 if (st->codec->extradata_size == 36) {
1209 st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1210 st->codec->channels = AV_RB8 (st->codec->extradata+21);
1211 }
1212 break;
1213 default:
1214 break;
1215 }
1216
1217 return 0;
1218 }
1219
1220 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1221 {
1222 AVStream *st;
1223 MOVStreamContext *sc;
1224 unsigned int i, entries;
1225
1226 if (c->fc->nb_streams < 1)
1227 return 0;
1228 st = c->fc->streams[c->fc->nb_streams-1];
1229 sc = st->priv_data;
1230
1231 get_byte(pb); /* version */
1232 get_be24(pb); /* flags */
1233
1234 entries = get_be32(pb);
1235
1236 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1237
1238 if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1239 return -1;
1240 sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1241 if (!sc->stsc_data)
1242 return AVERROR(ENOMEM);
1243 sc->stsc_count = entries;
1244
1245 for(i=0; i<entries; i++) {
1246 sc->stsc_data[i].first = get_be32(pb);
1247 sc->stsc_data[i].count = get_be32(pb);
1248 sc->stsc_data[i].id = get_be32(pb);
1249 }
1250 return 0;
1251 }
1252
1253 static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1254 {
1255 AVStream *st;
1256 MOVStreamContext *sc;
1257 unsigned i, entries;
1258
1259 if (c->fc->nb_streams < 1)
1260 return 0;
1261 st = c->fc->streams[c->fc->nb_streams-1];
1262 sc = st->priv_data;
1263
1264 get_be32(pb); // version + flags
1265
1266 entries = get_be32(pb);
1267 if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1268 return -1;
1269 sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1270 if (!sc->stps_data)
1271 return AVERROR(ENOMEM);
1272 sc->stps_count = entries;
1273
1274 for (i = 0; i < entries; i++) {
1275 sc->stps_data[i] = get_be32(pb);
1276 //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1277 }
1278
1279 return 0;
1280 }
1281
1282 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1283 {
1284 AVStream *st;
1285 MOVStreamContext *sc;
1286 unsigned int i, entries;
1287
1288 if (c->fc->nb_streams < 1)
1289 return 0;
1290 st = c->fc->streams[c->fc->nb_streams-1];
1291 sc = st->priv_data;
1292
1293 get_byte(pb); /* version */
1294 get_be24(pb); /* flags */
1295
1296 entries = get_be32(pb);
1297
1298 dprintf(c->fc, "keyframe_count = %d\n", entries);
1299
1300 if(entries >= UINT_MAX / sizeof(int))
1301 return -1;
1302 sc->keyframes = av_malloc(entries * sizeof(int));
1303 if (!sc->keyframes)
1304 return AVERROR(ENOMEM);
1305 sc->keyframe_count = entries;
1306
1307 for(i=0; i<entries; i++) {
1308 sc->keyframes[i] = get_be32(pb);
1309 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1310 }
1311 return 0;
1312 }
1313
1314 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1315 {
1316 AVStream *st;
1317 MOVStreamContext *sc;
1318 unsigned int i, entries, sample_size, field_size, num_bytes;
1319 GetBitContext gb;
1320 unsigned char* buf;
1321
1322 if (c->fc->nb_streams < 1)
1323 return 0;
1324 st = c->fc->streams[c->fc->nb_streams-1];
1325 sc = st->priv_data;
1326
1327 get_byte(pb); /* version */
1328 get_be24(pb); /* flags */
1329
1330 if (atom.type == MKTAG('s','t','s','z')) {
1331 sample_size = get_be32(pb);
1332 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1333 sc->sample_size = sample_size;
1334 field_size = 32;
1335 } else {
1336 sample_size = 0;
1337 get_be24(pb); /* reserved */
1338 field_size = get_byte(pb);
1339 }
1340 entries = get_be32(pb);
1341
1342 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1343
1344 sc->sample_count = entries;
1345 if (sample_size)
1346 return 0;
1347
1348 if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1349 av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1350 return -1;
1351 }
1352
1353 if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1354 return -1;
1355 sc->sample_sizes = av_malloc(entries * sizeof(int));
1356 if (!sc->sample_sizes)
1357 return AVERROR(ENOMEM);
1358
1359 num_bytes = (entries*field_size+4)>>3;
1360
1361 buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1362 if (!buf) {
1363 av_freep(&sc->sample_sizes);
1364 return AVERROR(ENOMEM);
1365 }
1366
1367 if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1368 av_freep(&sc->sample_sizes);
1369 av_free(buf);
1370 return -1;
1371 }
1372
1373 init_get_bits(&gb, buf, 8*num_bytes);
1374
1375 for(i=0; i<entries; i++)
1376 sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1377
1378 av_free(buf);
1379 return 0;
1380 }
1381
1382 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1383 {
1384 AVStream *st;
1385 MOVStreamContext *sc;
1386 unsigned int i, entries;
1387 int64_t duration=0;
1388 int64_t total_sample_count=0;
1389
1390 if (c->fc->nb_streams < 1)
1391 return 0;
1392 st = c->fc->streams[c->fc->nb_streams-1];
1393 sc = st->priv_data;
1394
1395 get_byte(pb); /* version */
1396 get_be24(pb); /* flags */
1397 entries = get_be32(pb);
1398
1399 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1400
1401 if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1402 return -1;
1403 sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1404 if (!sc->stts_data)
1405 return AVERROR(ENOMEM);
1406 sc->stts_count = entries;
1407
1408 for(i=0; i<entries; i++) {
1409 int sample_duration;
1410 int sample_count;
1411
1412 sample_count=get_be32(pb);
1413 sample_duration = get_be32(pb);
1414 sc->stts_data[i].count= sample_count;
1415 sc->stts_data[i].duration= sample_duration;
1416
1417 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1418
1419 duration+=(int64_t)sample_duration*sample_count;
1420 total_sample_count+=sample_count;
1421 }
1422
1423 st->nb_frames= total_sample_count;
1424 if(duration)
1425 st->duration= duration;
1426 return 0;
1427 }
1428
1429 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1430 {
1431 AVStream *st;
1432 MOVStreamContext *sc;
1433 unsigned int i, entries;
1434
1435 if (c->fc->nb_streams < 1)
1436 return 0;
1437 st = c->fc->streams[c->fc->nb_streams-1];
1438 sc = st->priv_data;
1439
1440 get_byte(pb); /* version */
1441 get_be24(pb); /* flags */
1442 entries = get_be32(pb);
1443
1444 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1445
1446 if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1447 return -1;
1448 sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1449 if (!sc->ctts_data)
1450 return AVERROR(ENOMEM);
1451 sc->ctts_count = entries;
1452
1453 for(i=0; i<entries; i++) {
1454 int count =get_be32(pb);
1455 int duration =get_be32(pb);
1456
1457 sc->ctts_data[i].count = count;
1458 sc->ctts_data[i].duration= duration;
1459 if (duration < 0)
1460 sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1461 }
1462
1463 dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1464
1465 return 0;
1466 }
1467
1468 static void mov_build_index(MOVContext *mov, AVStream *st)
1469 {
1470 MOVStreamContext *sc = st->priv_data;
1471 int64_t current_offset;
1472 int64_t current_dts = 0;
1473 unsigned int stts_index = 0;
1474 unsigned int stsc_index = 0;
1475 unsigned int stss_index = 0;
1476 unsigned int stps_index = 0;
1477 unsigned int i, j;
1478 uint64_t stream_size = 0;
1479
1480 /* adjust first dts according to edit list */
1481 if (sc->time_offset) {
1482 int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1483 current_dts = -rescaled;
1484 if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1485 /* more than 16 frames delay, dts are likely wrong
1486 this happens with files created by iMovie */
1487 sc->wrong_dts = 1;
1488 st->codec->has_b_frames = 1;
1489 }
1490 }
1491
1492 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1493 if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1494 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1495 unsigned int current_sample = 0;
1496 unsigned int stts_sample = 0;
1497 unsigned int sample_size;
1498 unsigned int distance = 0;
1499 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1500
1501 current_dts -= sc->dts_shift;
1502
1503 if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1504 return;
1505 st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1506 if (!st->index_entries)
1507 return;
1508 st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1509
1510 for (i = 0; i < sc->chunk_count; i++) {
1511 current_offset = sc->chunk_offsets[i];
1512 if (stsc_index + 1 < sc->stsc_count &&
1513 i + 1 == sc->stsc_data[stsc_index + 1].first)
1514 stsc_index++;
1515 for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1516 int keyframe = 0;
1517 if (current_sample >= sc->sample_count) {
1518 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1519 return;
1520 }
1521
1522 if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1523 keyframe = 1;
1524 if (stss_index + 1 < sc->keyframe_count)
1525 stss_index++;
1526 } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1527 keyframe = 1;
1528 if (stps_index + 1 < sc->stps_count)
1529 stps_index++;
1530 }
1531 if (keyframe)
1532 distance = 0;
1533 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1534 if(sc->pseudo_stream_id == -1 ||
1535 sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1536 AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1537 e->pos = current_offset;
1538 e->timestamp = current_dts;
1539 e->size = sample_size;
1540 e->min_distance = distance;
1541 e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1542 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1543 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1544 current_offset, current_dts, sample_size, distance, keyframe);
1545 }
1546
1547 current_offset += sample_size;
1548 stream_size += sample_size;
1549 current_dts += sc->stts_data[stts_index].duration;
1550 distance++;
1551 stts_sample++;
1552 current_sample++;
1553 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1554 stts_sample = 0;
1555 stts_index++;
1556 }
1557 }
1558 }
1559 if (st->duration > 0)
1560 st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1561 } else {
1562 unsigned chunk_samples, total = 0;
1563
1564 // compute total chunk count
1565 for (i = 0; i < sc->stsc_count; i++) {
1566 unsigned count, chunk_count;
1567
1568 chunk_samples = sc->stsc_data[i].count;
1569 if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1570 av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1571 return;
1572 }
1573
1574 if (sc->samples_per_frame >= 160) { // gsm
1575 count = chunk_samples / sc->samples_per_frame;
1576 } else if (sc->samples_per_frame > 1) {
1577 unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1578 count = (chunk_samples+samples-1) / samples;
1579 } else {
1580 count = (chunk_samples+1023) / 1024;
1581 }
1582
1583 if (i < sc->stsc_count - 1)
1584 chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1585 else
1586 chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1587 total += chunk_count * count;
1588 }
1589
1590 dprintf(mov->fc, "chunk count %d\n", total);
1591 if (total >= UINT_MAX / sizeof(*st->index_entries))
1592 return;
1593 st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1594 if (!st->index_entries)
1595 return;
1596 st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1597
1598 // populate index
1599 for (i = 0; i < sc->chunk_count; i++) {
1600 current_offset = sc->chunk_offsets[i];
1601 if (stsc_index + 1 < sc->stsc_count &&
1602 i + 1 == sc->stsc_data[stsc_index + 1].first)
1603 stsc_index++;
1604 chunk_samples = sc->stsc_data[stsc_index].count;
1605
1606 while (chunk_samples > 0) {
1607 AVIndexEntry *e;
1608 unsigned size, samples;
1609
1610 if (sc->samples_per_frame >= 160) { // gsm
1611 samples = sc->samples_per_frame;
1612 size = sc->bytes_per_frame;
1613 } else {
1614 if (sc->samples_per_frame > 1) {
1615 samples = FFMIN((1024 / sc->samples_per_frame)*
1616 sc->samples_per_frame, chunk_samples);
1617 size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1618 } else {
1619 samples = FFMIN(1024, chunk_samples);
1620 size = samples * sc->sample_size;
1621 }
1622 }
1623
1624 if (st->nb_index_entries >= total) {
1625 av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1626 return;
1627 }
1628 e = &st->index_entries[st->nb_index_entries++];
1629 e->pos = current_offset;
1630 e->timestamp = current_dts;
1631 e->size = size;
1632 e->min_distance = 0;
1633 e->flags = AVINDEX_KEYFRAME;
1634 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1635 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1636 size, samples);
1637
1638 current_offset += size;
1639 current_dts += samples;
1640 chunk_samples -= samples;
1641 }
1642 }
1643 }
1644 }
1645
1646 static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
1647 {
1648 /* try relative path, we do not try the absolute because it can leak information about our
1649 system to an attacker */
1650 if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1651 char filename[1024];
1652 char *src_path;
1653 int i, l;
1654
1655 /* find a source dir */
1656 src_path = strrchr(src, '/');
1657 if (src_path)
1658 src_path++;
1659 else
1660 src_path = src;
1661
1662 /* find a next level down to target */
1663 for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1664 if (ref->path[l] == '/') {
1665 if (i == ref->nlvl_to - 1)
1666 break;
1667 else
1668 i++;
1669 }
1670
1671 /* compose filename if next level down to target was found */
1672 if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) {
1673 memcpy(filename, src, src_path - src);
1674 filename[src_path - src] = 0;
1675
1676 for (i = 1; i < ref->nlvl_from; i++)
1677 av_strlcat(filename, "../", 1024);
1678
1679 av_strlcat(filename, ref->path + l + 1, 1024);
1680
1681 if (!url_fopen(pb, filename, URL_RDONLY))
1682 return 0;
1683 }
1684 }
1685
1686 return AVERROR(ENOENT);
1687 };
1688
1689 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1690 {
1691 AVStream *st;
1692 MOVStreamContext *sc;
1693 int ret;
1694
1695 st = av_new_stream(c->fc, c->fc->nb_streams);
1696 if (!st) return AVERROR(ENOMEM);
1697 sc = av_mallocz(sizeof(MOVStreamContext));
1698 if (!sc) return AVERROR(ENOMEM);
1699
1700 st->priv_data = sc;
1701 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1702 sc->ffindex = st->index;
1703
1704 if ((ret = mov_read_default(c, pb, atom)) < 0)
1705 return ret;
1706
1707 /* sanity checks */
1708 if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1709 (!sc->sample_size && !sc->sample_count))) {
1710 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1711 st->index);
1712 return 0;
1713 }
1714
1715 if (!sc->time_scale) {
1716 av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1717 sc->time_scale = c->time_scale;
1718 if (!sc->time_scale)
1719 sc->time_scale = 1;
1720 }
1721
1722 av_set_pts_info(st, 64, 1, sc->time_scale);
1723
1724 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1725 !st->codec->frame_size && sc->stts_count == 1) {
1726 st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1727 st->codec->sample_rate, sc->time_scale);
1728 dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1729 }
1730
1731 mov_build_index(c, st);
1732
1733 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1734 MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1735 if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1736 av_log(c->fc, AV_LOG_ERROR,
1737 "stream %d, error opening alias: path='%s', dir='%s', "
1738 "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1739 st->index, dref->path, dref->dir, dref->filename,
1740 dref->volume, dref->nlvl_from, dref->nlvl_to);
1741 } else
1742 sc->pb = c->fc->pb;
1743
1744 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1745 if (st->codec->width != sc->width || st->codec->height != sc->height) {
1746 AVRational r = av_d2q(((double)st->codec->height * sc->width) /
1747 ((double)st->codec->width * sc->height), INT_MAX);
1748 if (st->sample_aspect_ratio.num)
1749 st->sample_aspect_ratio = av_mul_q(st->sample_aspect_ratio, r);
1750 else
1751 st->sample_aspect_ratio = r;
1752 }
1753
1754 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1755 sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1756 }
1757
1758 switch (st->codec->codec_id) {
1759 #if CONFIG_H261_DECODER
1760 case CODEC_ID_H261:
1761 #endif
1762 #if CONFIG_H263_DECODER
1763 case CODEC_ID_H263:
1764 #endif
1765 #if CONFIG_H264_DECODER
1766 case CODEC_ID_H264:
1767 #endif
1768 #if CONFIG_MPEG4_DECODER
1769 case CODEC_ID_MPEG4:
1770 #endif
1771 st->codec->width = 0; /* let decoder init width/height */
1772 st->codec->height= 0;
1773 break;
1774 }
1775
1776 /* Do not need those anymore. */
1777 av_freep(&sc->chunk_offsets);
1778 av_freep(&sc->stsc_data);
1779 av_freep(&sc->sample_sizes);
1780 av_freep(&sc->keyframes);
1781 av_freep(&sc->stts_data);
1782 av_freep(&sc->stps_data);
1783
1784 return 0;
1785 }
1786
1787 static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1788 {
1789 int ret;
1790 c->itunes_metadata = 1;
1791 ret = mov_read_default(c, pb, atom);
1792 c->itunes_metadata = 0;
1793 return ret;
1794 }
1795
1796 static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1797 {
1798 while (atom.size > 8) {
1799 uint32_t tag = get_le32(pb);
1800 atom.size -= 4;
1801 if (tag == MKTAG('h','d','l','r')) {
1802 url_fseek(pb, -8, SEEK_CUR);
1803 atom.size += 8;
1804 return mov_read_default(c, pb, atom);
1805 }
1806 }
1807 return 0;
1808 }
1809
1810 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1811 {
1812 int i;
1813 int width;
1814 int height;
1815 int64_t disp_transform[2];
1816 int display_matrix[3][2];
1817 AVStream *st;
1818 MOVStreamContext *sc;
1819 int version;
1820
1821 if (c->fc->nb_streams < 1)
1822 return 0;
1823 st = c->fc->streams[c->fc->nb_streams-1];
1824 sc = st->priv_data;
1825
1826 version = get_byte(pb);
1827 get_be24(pb); /* flags */
1828 /*
1829 MOV_TRACK_ENABLED 0x0001
1830 MOV_TRACK_IN_MOVIE 0x0002
1831 MOV_TRACK_IN_PREVIEW 0x0004
1832 MOV_TRACK_IN_POSTER 0x0008
1833 */
1834
1835 if (version == 1) {
1836 get_be64(pb);
1837 get_be64(pb);
1838 } else {
1839 get_be32(pb); /* creation time */
1840 get_be32(pb); /* modification time */
1841 }
1842 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1843 get_be32(pb); /* reserved */
1844
1845 /* highlevel (considering edits) duration in movie timebase */
1846 (version == 1) ? get_be64(pb) : get_be32(pb);
1847 get_be32(pb); /* reserved */
1848 get_be32(pb); /* reserved */
1849
1850 get_be16(pb); /* layer */
1851 get_be16(pb); /* alternate group */
1852 get_be16(pb); /* volume */
1853 get_be16(pb); /* reserved */
1854
1855 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1856 // they're kept in fixed point format through all calculations
1857 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1858 for (i = 0; i < 3; i++) {
1859 display_matrix[i][0] = get_be32(pb); // 16.16 fixed point
1860 display_matrix[i][1] = get_be32(pb); // 16.16 fixed point
1861 get_be32(pb); // 2.30 fixed point (not used)
1862 }
1863
1864 width = get_be32(pb); // 16.16 fixed point track width
1865 height = get_be32(pb); // 16.16 fixed point track height
1866 sc->width = width >> 16;
1867 sc->height = height >> 16;
1868
1869 // transform the display width/height according to the matrix
1870 // skip this if the display matrix is the default identity matrix
1871 // or if it is rotating the picture, ex iPhone 3GS
1872 // to keep the same scale, use [width height 1<<16]
1873 if (width && height &&
1874 ((display_matrix[0][0] != 65536 ||
1875 display_matrix[1][1] != 65536) &&
1876 !display_matrix[0][1] &&
1877 !display_matrix[1][0] &&
1878 !display_matrix[2][0] && !display_matrix[2][1])) {
1879 for (i = 0; i < 2; i++)
1880 disp_transform[i] =
1881 (int64_t) width * display_matrix[0][i] +
1882 (int64_t) height * display_matrix[1][i] +
1883 ((int64_t) display_matrix[2][i] << 16);
1884
1885 //sample aspect ratio is new width/height divided by old width/height
1886 st->sample_aspect_ratio = av_d2q(
1887 ((double) disp_transform[0] * height) /
1888 ((double) disp_transform[1] * width), INT_MAX);
1889 }
1890 return 0;
1891 }
1892
1893 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1894 {
1895 MOVFragment *frag = &c->fragment;
1896 MOVTrackExt *trex = NULL;
1897 int flags, track_id, i;
1898
1899 get_byte(pb); /* version */
1900 flags = get_be24(pb);
1901
1902 track_id = get_be32(pb);
1903 if (!track_id)
1904 return -1;
1905 frag->track_id = track_id;
1906 for (i = 0; i < c->trex_count; i++)
1907 if (c->trex_data[i].track_id == frag->track_id) {
1908 trex = &c->trex_data[i];
1909 break;
1910 }
1911 if (!trex) {
1912 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1913 return -1;
1914 }
1915
1916 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1917 else frag->base_data_offset = frag->moof_offset;
1918 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1919 else frag->stsd_id = trex->stsd_id;
1920
1921 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1922 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1923 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1924 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1925 return 0;
1926 }
1927
1928 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1929 {
1930 MOVTrackExt *trex;
1931
1932 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1933 return -1;
1934 trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1935 if (!trex)
1936 return AVERROR(ENOMEM);
1937 c->trex_data = trex;
1938 trex = &c->trex_data[c->trex_count++];
1939 get_byte(pb); /* version */
1940 get_be24(pb); /* flags */
1941 trex->track_id = get_be32(pb);
1942 trex->stsd_id = get_be32(pb);
1943 trex->duration = get_be32(pb);
1944 trex->size = get_be32(pb);
1945 trex->flags = get_be32(pb);
1946 return 0;
1947 }
1948
1949 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1950 {
1951 MOVFragment *frag = &c->fragment;
1952 AVStream *st = NULL;
1953 MOVStreamContext *sc;
1954 uint64_t offset;
1955 int64_t dts;
1956 int data_offset = 0;
1957 unsigned entries, first_sample_flags = frag->flags;
1958 int flags, distance, i;
1959
1960 for (i = 0; i < c->fc->nb_streams; i++) {
1961 if (c->fc->streams[i]->id == frag->track_id) {
1962 st = c->fc->streams[i];
1963 break;
1964 }
1965 }
1966 if (!st) {
1967 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1968 return -1;
1969 }
1970 sc = st->priv_data;
1971 if (sc->pseudo_stream_id+1 != frag->stsd_id)
1972 return 0;
1973 get_byte(pb); /* version */
1974 flags = get_be24(pb);
1975 entries = get_be32(pb);
1976 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1977 if (flags & 0x001) data_offset = get_be32(pb);
1978 if (flags & 0x004) first_sample_flags = get_be32(pb);
1979 if (flags & 0x800) {
1980 MOVStts *ctts_data;
1981 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1982 return -1;
1983 ctts_data = av_realloc(sc->ctts_data,
1984 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1985 if (!ctts_data)
1986 return AVERROR(ENOMEM);
1987 sc->ctts_data = ctts_data;
1988 }
1989 dts = st->duration;
1990 offset = frag->base_data_offset + data_offset;
1991 distance = 0;
1992 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1993 for (i = 0; i < entries; i++) {
1994 unsigned sample_size = frag->size;
1995 int sample_flags = i ? frag->flags : first_sample_flags;
1996 unsigned sample_duration = frag->duration;
1997 int keyframe;
1998
1999 if (flags & 0x100) sample_duration = get_be32(pb);
2000 if (flags & 0x200) sample_size = get_be32(pb);
2001 if (flags & 0x400) sample_flags = get_be32(pb);
2002 if (flags & 0x800) {
2003 sc->ctts_data[sc->ctts_count].count = 1;
2004 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
2005 sc->ctts_count++;
2006 }
2007 if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2008 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2009 distance = 0;
2010 av_add_index_entry(st, offset, dts, sample_size, distance,
2011 keyframe ? AVINDEX_KEYFRAME : 0);
2012 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2013 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2014 offset, dts, sample_size, distance, keyframe);
2015 distance++;
2016 dts += sample_duration;
2017 offset += sample_size;
2018 }
2019 frag->moof_offset = offset;
2020 st->duration = dts;
2021 return 0;
2022 }
2023
2024 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2025 /* like the files created with Adobe Premiere 5.0, for samples see */
2026 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2027 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2028 {
2029 int err;
2030
2031 if (atom.size < 8)
2032 return 0; /* continue */
2033 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2034 url_fskip(pb, atom.size - 4);
2035 return 0;
2036 }
2037 atom.type = get_le32(pb);
2038 atom.size -= 8;
2039 if (atom.type != MKTAG('m','d','a','t')) {
2040 url_fskip(pb, atom.size);
2041 return 0;
2042 }
2043 err = mov_read_mdat(c, pb, atom);
2044 return err;
2045 }
2046
2047 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2048 {
2049 #if CONFIG_ZLIB
2050 ByteIOContext ctx;
2051 uint8_t *cmov_data;
2052 uint8_t *moov_data; /* uncompressed data */
2053 long cmov_len, moov_len;
2054 int ret = -1;
2055
2056 get_be32(pb); /* dcom atom */
2057 if (get_le32(pb) != MKTAG('d','c','o','m'))
2058 return -1;
2059 if (get_le32(pb) != MKTAG('z','l','i','b')) {
2060 av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2061 return -1;
2062 }
2063 get_be32(pb); /* cmvd atom */
2064 if (get_le32(pb) != MKTAG('c','m','v','d'))
2065 return -1;
2066 moov_len = get_be32(pb); /* uncompressed size */
2067 cmov_len = atom.size - 6 * 4;
2068
2069 cmov_data = av_malloc(cmov_len);
2070 if (!cmov_data)
2071 return AVERROR(ENOMEM);
2072 moov_data = av_malloc(moov_len);
2073 if (!moov_data) {
2074 av_free(cmov_data);
2075 return AVERROR(ENOMEM);
2076 }
2077 get_buffer(pb, cmov_data, cmov_len);
2078 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2079 goto free_and_return;
2080 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2081 goto free_and_return;
2082 atom.type = MKTAG('m','o','o','v');
2083 atom.size = moov_len;
2084 #ifdef DEBUG
2085 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2086 #endif
2087 ret = mov_read_default(c, &ctx, atom);
2088 free_and_return:
2089 av_free(moov_data);
2090 av_free(cmov_data);
2091 return ret;
2092 #else
2093 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2094 return -1;
2095 #endif
2096 }
2097
2098 /* edit list atom */
2099 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2100 {
2101 MOVStreamContext *sc;
2102 int i, edit_count;
2103
2104 if (c->fc->nb_streams < 1)
2105 return 0;
2106 sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2107
2108 get_byte(pb); /* version */
2109 get_be24(pb); /* flags */
2110 edit_count = get_be32(pb); /* entries */
2111
2112 if((uint64_t)edit_count*12+8 > atom.size)
2113 return -1;
2114
2115 for(i=0; i<edit_count; i++){
2116 int time;
2117 int duration = get_be32(pb); /* Track duration */
2118 time = get_be32(pb); /* Media time */
2119 get_be32(pb); /* Media rate */
2120 if (i == 0 && time >= -1) {
2121 sc->time_offset = time != -1 ? time : -duration;
2122 }
2123 }
2124
2125 if(edit_count > 1)
2126 av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2127 "a/v desync might occur, patch welcome\n");
2128
2129 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2130 return 0;
2131 }
2132
2133 static const MOVParseTableEntry mov_default_parse_table[] = {
2134 { MKTAG('a','v','s','s'), mov_read_extradata },
2135 { MKTAG('c','o','6','4'), mov_read_stco },
2136 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2137 { MKTAG('d','i','n','f'), mov_read_default },
2138 { MKTAG('d','r','e','f'), mov_read_dref },
2139 { MKTAG('e','d','t','s'), mov_read_default },
2140 { MKTAG('e','l','s','t'), mov_read_elst },
2141 { MKTAG('e','n','d','a'), mov_read_enda },
2142 { MKTAG('f','i','e','l'), mov_read_extradata },
2143 { MKTAG('f','t','y','p'), mov_read_ftyp },
2144 { MKTAG('g','l','b','l'), mov_read_glbl },
2145 { MKTAG('h','d','l','r'), mov_read_hdlr },
2146 { MKTAG('i','l','s','t'), mov_read_ilst },
2147 { MKTAG('j','p','2','h'), mov_read_extradata },
2148 { MKTAG('m','d','a','t'), mov_read_mdat },
2149 { MKTAG('m','d','h','d'), mov_read_mdhd },
2150 { MKTAG('m','d','i','a'), mov_read_default },
2151 { MKTAG('m','e','t','a'), mov_read_meta },
2152 { MKTAG('m','i','n','f'), mov_read_default },
2153 { MKTAG('m','o','o','f'), mov_read_moof },
2154 { MKTAG('m','o','o','v'), mov_read_moov },
2155 { MKTAG('m','v','e','x'), mov_read_default },
2156 { MKTAG('m','v','h','d'), mov_read_mvhd },
2157 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2158 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2159 { MKTAG('a','v','c','C'), mov_read_glbl },
2160 { MKTAG('p','a','s','p'), mov_read_pasp },
2161 { MKTAG('s','t','b','l'), mov_read_default },
2162 { MKTAG('s','t','c','o'), mov_read_stco },
2163 { MKTAG('s','t','p','s'), mov_read_stps },
2164 { MKTAG('s','t','s','c'), mov_read_stsc },
2165 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2166 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2167 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2168 { MKTAG('s','t','t','s'), mov_read_stts },
2169 { MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2170 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2171 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2172 { MKTAG('t','r','a','k'), mov_read_trak },
2173 { MKTAG('t','r','a','f'), mov_read_default },
2174 { MKTAG('t','r','e','x'), mov_read_trex },
2175 { MKTAG('t','r','u','n'), mov_read_trun },
2176 { MKTAG('u','d','t','a'), mov_read_default },
2177 { MKTAG('w','a','v','e'), mov_read_wave },
2178 { MKTAG('e','s','d','s'), mov_read_esds },
2179 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2180 { MKTAG('c','m','o','v'), mov_read_cmov },
2181 { 0, NULL }
2182 };
2183
2184 static int mov_probe(AVProbeData *p)
2185 {
2186 unsigned int offset;
2187 uint32_t tag;
2188 int score = 0;
2189
2190 /* check file header */
2191 offset = 0;
2192 for(;;) {
2193 /* ignore invalid offset */
2194 if ((offset + 8) > (unsigned int)p->buf_size)
2195 return score;
2196 tag = AV_RL32(p->buf + offset + 4);
2197 switch(tag) {
2198 /* check for obvious tags */
2199 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2200 case MKTAG('m','o','o','v'):
2201 case MKTAG('m','d','a','t'):
2202 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2203 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2204 case MKTAG('f','t','y','p'):
2205 return AVPROBE_SCORE_MAX;
2206 /* those are more common words, so rate then a bit less */
2207 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2208 case MKTAG('w','i','d','e'):
2209 case MKTAG('f','r','e','e'):
2210 case MKTAG('j','u','n','k'):
2211 case MKTAG('p','i','c','t'):
2212 return AVPROBE_SCORE_MAX - 5;
2213 case MKTAG(0x82,0x82,0x7f,0x7d):
2214 case MKTAG('s','k','i','p'):
2215 case MKTAG('u','u','i','d'):
2216 case MKTAG('p','r','f','l'):
2217 offset = AV_RB32(p->buf+offset) + offset;
2218 /* if we only find those cause probedata is too small at least rate them */
2219 score = AVPROBE_SCORE_MAX - 50;
2220 break;
2221 default:
2222 /* unrecognized tag */
2223 return score;
2224 }
2225 }
2226 return score;
2227 }
2228
2229 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2230 {
2231 MOVContext *mov = s->priv_data;
2232 ByteIOContext *pb = s->pb;
2233 int err;
2234 MOVAtom atom = { 0 };
2235
2236 mov->fc = s;
2237 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2238 if(!url_is_streamed(pb))
2239 atom.size = url_fsize(pb);
2240 else
2241 atom.size = INT64_MAX;
2242
2243 /* check MOV header */
2244 if ((err = mov_read_default(mov, pb, atom)) < 0) {
2245 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2246 return err;
2247 }
2248 if (!mov->found_moov) {
2249 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2250 return -1;
2251 }
2252 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2253
2254 return 0;
2255 }
2256
2257 static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2258 {
2259 AVIndexEntry *sample = NULL;
2260 int64_t best_dts = INT64_MAX;
2261 int i;
2262 for (i = 0; i < s->nb_streams; i++) {
2263 AVStream *avst = s->streams[i];
2264 MOVStreamContext *msc = avst->priv_data;
2265 if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2266 AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2267 int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2268 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2269 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2270 (!url_is_streamed(s->pb) &&
2271 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2272 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2273 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2274 sample = current_sample;
2275 best_dts = dts;
2276 *st = avst;
2277 }
2278 }
2279 }
2280 return sample;
2281 }
2282
2283 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2284 {
2285 MOVContext *mov = s->priv_data;
2286 MOVStreamContext *sc;
2287 AVIndexEntry *sample;
2288 AVStream *st = NULL;
2289 int ret;
2290 retry:
2291 sample = mov_find_next_sample(s, &st);
2292 if (!sample) {
2293 mov->found_mdat = 0;
2294 if (!url_is_streamed(s->pb) ||
2295 mov_read_default(mov, s->pb, (MOVAtom){ 0, INT64_MAX }) < 0 ||
2296 url_feof(s->pb))
2297 return AVERROR_EOF;
2298 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2299 goto retry;
2300 }
2301 sc = st->priv_data;
2302 /* must be done just before reading, to avoid infinite loop on sample */
2303 sc->current_sample++;
2304
2305 if (st->discard != AVDISCARD_ALL) {
2306 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2307 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2308 sc->ffindex, sample->pos);
2309 return -1;
2310 }
2311 ret = av_get_packet(sc->pb, pkt, sample->size);
2312 if (ret < 0)
2313 return ret;
2314 #if CONFIG_DV_DEMUXER
2315 if (mov->dv_demux && sc->dv_audio_container) {
2316 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2317 av_free(pkt->data);
2318 pkt->size = 0;
2319 ret = dv_get_packet(mov->dv_demux, pkt);
2320 if (ret < 0)
2321 return ret;
2322 }
2323 #endif
2324 }
2325
2326 pkt->stream_index = sc->ffindex;
2327 pkt->dts = sample->timestamp;
2328 if (sc->ctts_data) {
2329 pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2330 /* update ctts context */
2331 sc->ctts_sample++;
2332 if (sc->ctts_index < sc->ctts_count &&
2333 sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2334 sc->ctts_index++;
2335 sc->ctts_sample = 0;
2336 }
2337 if (sc->wrong_dts)
2338 pkt->dts = AV_NOPTS_VALUE;
2339 } else {
2340 int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2341 st->index_entries[sc->current_sample].timestamp : st->duration;
2342 pkt->duration = next_dts - pkt->dts;
2343 pkt->pts = pkt->dts;
2344 }
2345 if (st->discard == AVDISCARD_ALL)
2346 goto retry;
2347 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2348 pkt->pos = sample->pos;
2349 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2350 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2351 return 0;
2352 }
2353
2354 static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2355 {
2356 MOVStreamContext *sc = st->priv_data;
2357 int sample, time_sample;
2358 int i;
2359
2360 sample = av_index_search_timestamp(st, timestamp, flags);
2361 dprintf(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2362 if (sample < 0) /* not sure what to do */
2363 return -1;
2364 sc->current_sample = sample;
2365 dprintf(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2366 /* adjust ctts index */
2367 if (sc->ctts_data) {
2368 time_sample = 0;
2369 for (i = 0; i < sc->ctts_count; i++) {
2370 int next = time_sample + sc->ctts_data[i].count;
2371 if (next > sc->current_sample) {
2372 sc->ctts_index = i;
2373 sc->ctts_sample = sc->current_sample - time_sample;
2374 break;
2375 }
2376 time_sample = next;
2377 }
2378 }
2379 return sample;
2380 }
2381
2382 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2383 {
2384 AVStream *st;
2385 int64_t seek_timestamp, timestamp;
2386 int sample;
2387 int i;
2388
2389 if (stream_index >= s->nb_streams)
2390 return -1;
2391 if (sample_time < 0)
2392 sample_time = 0;
2393
2394 st = s->streams[stream_index];
2395 sample = mov_seek_stream(s, st, sample_time, flags);
2396 if (sample < 0)
2397 return -1;
2398
2399 /* adjust seek timestamp to found sample timestamp */
2400 seek_timestamp = st->index_entries[sample].timestamp;
2401
2402 for (i = 0; i < s->nb_streams; i++) {
2403 st = s->streams[i];
2404 if (stream_index == i)
2405 continue;
2406
2407 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2408 mov_seek_stream(s, st, timestamp, flags);
2409 }
2410 return 0;
2411 }
2412
2413 static int mov_read_close(AVFormatContext *s)
2414 {
2415 MOVContext *mov = s->priv_data;
2416 int i, j;
2417
2418 for (i = 0; i < s->nb_streams; i++) {
2419 AVStream *st = s->streams[i];
2420 MOVStreamContext *sc = st->priv_data;
2421
2422 av_freep(&sc->ctts_data);
2423 for (j = 0; j < sc->drefs_count; j++) {
2424 av_freep(&sc->drefs[j].path);
2425 av_freep(&sc->drefs[j].dir);
2426 }
2427 av_freep(&sc->drefs);
2428 if (sc->pb && sc->pb != s->pb)
2429 url_fclose(sc->pb);
2430
2431 av_freep(&st->codec->palctrl);
2432 }
2433
2434 if (mov->dv_demux) {
2435 for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2436 av_freep(&mov->dv_fctx->streams[i]->codec);
2437 av_freep(&mov->dv_fctx->streams[i]);
2438 }
2439 av_freep(&mov->dv_fctx);
2440 av_freep(&mov->dv_demux);
2441 }
2442
2443 av_freep(&mov->trex_data);
2444
2445 return 0;
2446 }
2447
2448 AVInputFormat mov_demuxer = {
2449 "mov,mp4,m4a,3gp,3g2,mj2",
2450 NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2451 sizeof(MOVContext),
2452 mov_probe,
2453 mov_read_header,
2454 mov_read_packet,
2455 mov_read_close,
2456 mov_read_seek,
2457 };
Libav master