fc040fa161cc33ba408043c3787476f4a9ec2961
[libav.git] / libavformat / mov.c
1 /*
2 * MOV demuxer
3 * Copyright (c) 2001 Fabrice Bellard.
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <limits.h>
23
24 //#define DEBUG
25
26 #include "avformat.h"
27 #include "riff.h"
28 #include "isom.h"
29 #include "dv.h"
30
31 #ifdef CONFIG_ZLIB
32 #include <zlib.h>
33 #endif
34
35 /*
36 * First version by Francois Revol revol@free.fr
37 * Seek function by Gael Chardon gael.dev@4now.net
38 *
39 * Features and limitations:
40 * - reads most of the QT files I have (at least the structure),
41 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
42 * - the code is quite ugly... maybe I won't do it recursive next time :-)
43 *
44 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
45 * when coding this :) (it's a writer anyway)
46 *
47 * Reference documents:
48 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
49 * Apple:
50 * http://developer.apple.com/documentation/QuickTime/QTFF/
51 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
52 * QuickTime is a trademark of Apple (AFAIK :))
53 */
54
55 #include "qtpalette.h"
56
57
58 #undef NDEBUG
59 #include <assert.h>
60
61 /* the QuickTime file format is quite convoluted...
62 * it has lots of index tables, each indexing something in another one...
63 * Here we just use what is needed to read the chunks
64 */
65
66 typedef struct {
67 int first;
68 int count;
69 int id;
70 } MOV_stsc_t;
71
72 typedef struct {
73 uint32_t type;
74 char *path;
75 } MOV_dref_t;
76
77 typedef struct {
78 uint32_t type;
79 int64_t offset;
80 int64_t size; /* total size (excluding the size and type fields) */
81 } MOV_atom_t;
82
83 struct MOVParseTableEntry;
84
85 typedef struct {
86 unsigned track_id;
87 uint64_t base_data_offset;
88 uint64_t moof_offset;
89 unsigned stsd_id;
90 unsigned duration;
91 unsigned size;
92 unsigned flags;
93 } MOVFragment;
94
95 typedef struct {
96 unsigned track_id;
97 unsigned stsd_id;
98 unsigned duration;
99 unsigned size;
100 unsigned flags;
101 } MOVTrackExt;
102
103 typedef struct MOVStreamContext {
104 ByteIOContext *pb;
105 int ffindex; /* the ffmpeg stream id */
106 int next_chunk;
107 unsigned int chunk_count;
108 int64_t *chunk_offsets;
109 unsigned int stts_count;
110 MOV_stts_t *stts_data;
111 unsigned int ctts_count;
112 MOV_stts_t *ctts_data;
113 unsigned int edit_count; /* number of 'edit' (elst atom) */
114 unsigned int sample_to_chunk_sz;
115 MOV_stsc_t *sample_to_chunk;
116 int sample_to_ctime_index;
117 int sample_to_ctime_sample;
118 unsigned int sample_size;
119 unsigned int sample_count;
120 int *sample_sizes;
121 unsigned int keyframe_count;
122 int *keyframes;
123 int time_scale;
124 int time_rate;
125 int current_sample;
126 unsigned int bytes_per_frame;
127 unsigned int samples_per_frame;
128 int dv_audio_container;
129 int pseudo_stream_id;
130 int16_t audio_cid; ///< stsd audio compression id
131 unsigned drefs_count;
132 MOV_dref_t *drefs;
133 int dref_id;
134 } MOVStreamContext;
135
136 typedef struct MOVContext {
137 AVFormatContext *fc;
138 int time_scale;
139 int64_t duration; /* duration of the longest track */
140 int found_moov; /* when both 'moov' and 'mdat' sections has been found */
141 int found_mdat; /* we suppose we have enough data to read the file */
142 AVPaletteControl palette_control;
143 DVDemuxContext *dv_demux;
144 AVFormatContext *dv_fctx;
145 int isom; /* 1 if file is ISO Media (mp4/3gp) */
146 MOVFragment fragment; ///< current fragment in moof atom
147 MOVTrackExt *trex_data;
148 unsigned trex_count;
149 } MOVContext;
150
151
152 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
153
154 /* those functions parse an atom */
155 /* return code:
156 1: found what I wanted, exit
157 0: continue to parse next atom
158 <0: error occurred, exit
159 */
160 /* links atom IDs to parse functions */
161 typedef struct MOVParseTableEntry {
162 uint32_t type;
163 int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
164 } MOVParseTableEntry;
165
166 static const MOVParseTableEntry mov_default_parse_table[];
167
168 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
169 {
170 int64_t total_size = 0;
171 MOV_atom_t a;
172 int i;
173 int err = 0;
174
175 a.offset = atom.offset;
176
177 if (atom.size < 0)
178 atom.size = INT64_MAX;
179 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
180 a.size = atom.size;
181 a.type=0;
182 if(atom.size >= 8) {
183 a.size = get_be32(pb);
184 a.type = get_le32(pb);
185 }
186 total_size += 8;
187 a.offset += 8;
188 dprintf(c->fc, "type: %08x %.4s sz: %"PRIx64" %"PRIx64" %"PRIx64"\n",
189 a.type, (char*)&a.type, a.size, atom.size, total_size);
190 if (a.size == 1) { /* 64 bit extended size */
191 a.size = get_be64(pb) - 8;
192 a.offset += 8;
193 total_size += 8;
194 }
195 if (a.size == 0) {
196 a.size = atom.size - total_size;
197 if (a.size <= 8)
198 break;
199 }
200 a.size -= 8;
201 if(a.size < 0)
202 break;
203 a.size = FFMIN(a.size, atom.size - total_size);
204
205 for (i = 0; mov_default_parse_table[i].type != 0
206 && mov_default_parse_table[i].type != a.type; i++)
207 /* empty */;
208
209 if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
210 url_fskip(pb, a.size);
211 } else {
212 offset_t start_pos = url_ftell(pb);
213 int64_t left;
214 err = mov_default_parse_table[i].parse(c, pb, a);
215 if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
216 break;
217 left = a.size - url_ftell(pb) + start_pos;
218 if (left > 0) /* skip garbage at atom end */
219 url_fskip(pb, left);
220 }
221
222 a.offset += a.size;
223 total_size += a.size;
224 }
225
226 if (!err && total_size < atom.size && atom.size < 0x7ffff)
227 url_fskip(pb, atom.size - total_size);
228
229 return err;
230 }
231
232 static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
233 {
234 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
235 MOVStreamContext *sc = st->priv_data;
236 int entries, i, j;
237
238 get_be32(pb); // version + flags
239 entries = get_be32(pb);
240 if (entries >= UINT_MAX / sizeof(*sc->drefs))
241 return -1;
242 sc->drefs_count = entries;
243 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
244
245 for (i = 0; i < sc->drefs_count; i++) {
246 MOV_dref_t *dref = &sc->drefs[i];
247 uint32_t size = get_be32(pb);
248 offset_t next = url_ftell(pb) + size - 4;
249
250 dref->type = get_le32(pb);
251 get_be32(pb); // version + flags
252 dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
253
254 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
255 /* macintosh alias record */
256 uint16_t volume_len, len;
257 char volume[28];
258 int16_t type;
259
260 url_fskip(pb, 10);
261
262 volume_len = get_byte(pb);
263 volume_len = FFMIN(volume_len, 27);
264 get_buffer(pb, volume, 27);
265 volume[volume_len] = 0;
266 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
267
268 url_fskip(pb, 112);
269
270 for (type = 0; type != -1 && url_ftell(pb) < next; ) {
271 type = get_be16(pb);
272 len = get_be16(pb);
273 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
274 if (len&1)
275 len += 1;
276 if (type == 2) { // absolute path
277 av_free(dref->path);
278 dref->path = av_mallocz(len+1);
279 if (!dref->path)
280 return AVERROR(ENOMEM);
281 get_buffer(pb, dref->path, len);
282 if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
283 len -= volume_len;
284 memmove(dref->path, dref->path+volume_len, len);
285 dref->path[len] = 0;
286 }
287 for (j = 0; j < len; j++)
288 if (dref->path[j] == ':')
289 dref->path[j] = '/';
290 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
291 } else
292 url_fskip(pb, len);
293 }
294 }
295 url_fseek(pb, next, SEEK_SET);
296 }
297 return 0;
298 }
299
300 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
301 {
302 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
303 uint32_t type;
304 uint32_t ctype;
305
306 get_byte(pb); /* version */
307 get_be24(pb); /* flags */
308
309 /* component type */
310 ctype = get_le32(pb);
311 type = get_le32(pb); /* component subtype */
312
313 dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
314 ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
315 dprintf(c->fc, "stype= %c%c%c%c\n",
316 *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
317 if(!ctype)
318 c->isom = 1;
319 if(type == MKTAG('v', 'i', 'd', 'e'))
320 st->codec->codec_type = CODEC_TYPE_VIDEO;
321 else if(type == MKTAG('s', 'o', 'u', 'n'))
322 st->codec->codec_type = CODEC_TYPE_AUDIO;
323 else if(type == MKTAG('m', '1', 'a', ' '))
324 st->codec->codec_id = CODEC_ID_MP2;
325 else if(type == MKTAG('s', 'u', 'b', 'p')) {
326 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
327 }
328 get_be32(pb); /* component manufacture */
329 get_be32(pb); /* component flags */
330 get_be32(pb); /* component flags mask */
331
332 if(atom.size <= 24)
333 return 0; /* nothing left to read */
334
335 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
336 return 0;
337 }
338
339 static int mp4_read_descr_len(ByteIOContext *pb)
340 {
341 int len = 0;
342 int count = 4;
343 while (count--) {
344 int c = get_byte(pb);
345 len = (len << 7) | (c & 0x7f);
346 if (!(c & 0x80))
347 break;
348 }
349 return len;
350 }
351
352 static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
353 {
354 int len;
355 *tag = get_byte(pb);
356 len = mp4_read_descr_len(pb);
357 dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
358 return len;
359 }
360
361 #define MP4ESDescrTag 0x03
362 #define MP4DecConfigDescrTag 0x04
363 #define MP4DecSpecificDescrTag 0x05
364
365 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
366 {
367 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
368 int tag, len;
369
370 get_be32(pb); /* version + flags */
371 len = mp4_read_descr(c, pb, &tag);
372 if (tag == MP4ESDescrTag) {
373 get_be16(pb); /* ID */
374 get_byte(pb); /* priority */
375 } else
376 get_be16(pb); /* ID */
377
378 len = mp4_read_descr(c, pb, &tag);
379 if (tag == MP4DecConfigDescrTag) {
380 int object_type_id = get_byte(pb);
381 get_byte(pb); /* stream type */
382 get_be24(pb); /* buffer size db */
383 get_be32(pb); /* max bitrate */
384 get_be32(pb); /* avg bitrate */
385
386 st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
387 dprintf(c->fc, "esds object type id %d\n", object_type_id);
388 len = mp4_read_descr(c, pb, &tag);
389 if (tag == MP4DecSpecificDescrTag) {
390 dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
391 if((uint64_t)len > (1<<30))
392 return -1;
393 st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
394 if (!st->codec->extradata)
395 return AVERROR(ENOMEM);
396 get_buffer(pb, st->codec->extradata, len);
397 st->codec->extradata_size = len;
398 /* from mplayer */
399 if ((*st->codec->extradata >> 3) == 29) {
400 st->codec->codec_id = CODEC_ID_MP3ON4;
401 }
402 }
403 }
404 return 0;
405 }
406
407 /* this atom contains actual media data */
408 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
409 {
410 if(atom.size == 0) /* wrong one (MP4) */
411 return 0;
412 c->found_mdat=1;
413 return 0; /* now go for moov */
414 }
415
416 static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
417 {
418 uint32_t type = get_le32(pb);
419
420 if (type != MKTAG('q','t',' ',' '))
421 c->isom = 1;
422 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
423 get_be32(pb); /* minor version */
424 url_fskip(pb, atom.size - 8);
425 return 0;
426 }
427
428 /* this atom should contain all header atoms */
429 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
430 {
431 if (mov_read_default(c, pb, atom) < 0)
432 return -1;
433 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
434 /* so we don't parse the whole file if over a network */
435 c->found_moov=1;
436 return 0; /* now go for mdat */
437 }
438
439 static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
440 {
441 c->fragment.moof_offset = url_ftell(pb) - 8;
442 dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
443 return mov_read_default(c, pb, atom);
444 }
445
446 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
447 {
448 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
449 MOVStreamContext *sc = st->priv_data;
450 int version = get_byte(pb);
451 int lang;
452
453 if (version > 1)
454 return 1; /* unsupported */
455
456 get_be24(pb); /* flags */
457 if (version == 1) {
458 get_be64(pb);
459 get_be64(pb);
460 } else {
461 get_be32(pb); /* creation time */
462 get_be32(pb); /* modification time */
463 }
464
465 sc->time_scale = get_be32(pb);
466 st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
467
468 lang = get_be16(pb); /* language */
469 ff_mov_lang_to_iso639(lang, st->language);
470 get_be16(pb); /* quality */
471
472 return 0;
473 }
474
475 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
476 {
477 int version = get_byte(pb); /* version */
478 get_be24(pb); /* flags */
479
480 if (version == 1) {
481 get_be64(pb);
482 get_be64(pb);
483 } else {
484 get_be32(pb); /* creation time */
485 get_be32(pb); /* modification time */
486 }
487 c->time_scale = get_be32(pb); /* time scale */
488
489 dprintf(c->fc, "time scale = %i\n", c->time_scale);
490
491 c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
492 get_be32(pb); /* preferred scale */
493
494 get_be16(pb); /* preferred volume */
495
496 url_fskip(pb, 10); /* reserved */
497
498 url_fskip(pb, 36); /* display matrix */
499
500 get_be32(pb); /* preview time */
501 get_be32(pb); /* preview duration */
502 get_be32(pb); /* poster time */
503 get_be32(pb); /* selection time */
504 get_be32(pb); /* selection duration */
505 get_be32(pb); /* current time */
506 get_be32(pb); /* next track ID */
507
508 return 0;
509 }
510
511 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
512 {
513 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
514
515 if((uint64_t)atom.size > (1<<30))
516 return -1;
517
518 // currently SVQ3 decoder expect full STSD header - so let's fake it
519 // this should be fixed and just SMI header should be passed
520 av_free(st->codec->extradata);
521 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
522 if (!st->codec->extradata)
523 return AVERROR(ENOMEM);
524 st->codec->extradata_size = 0x5a + atom.size;
525 memcpy(st->codec->extradata, "SVQ3", 4); // fake
526 get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
527 dprintf(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
528 return 0;
529 }
530
531 static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
532 {
533 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
534 int little_endian = get_be16(pb);
535
536 if (little_endian) {
537 switch (st->codec->codec_id) {
538 case CODEC_ID_PCM_S24BE:
539 st->codec->codec_id = CODEC_ID_PCM_S24LE;
540 break;
541 case CODEC_ID_PCM_S32BE:
542 st->codec->codec_id = CODEC_ID_PCM_S32LE;
543 break;
544 default:
545 break;
546 }
547 }
548 return 0;
549 }
550
551 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
552 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
553 {
554 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
555 uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
556 uint8_t *buf;
557 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
558 return -1;
559 buf= av_realloc(st->codec->extradata, size);
560 if(!buf)
561 return -1;
562 st->codec->extradata= buf;
563 buf+= st->codec->extradata_size;
564 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
565 AV_WB32( buf , atom.size + 8);
566 AV_WL32( buf + 4, atom.type);
567 get_buffer(pb, buf + 8, atom.size);
568 return 0;
569 }
570
571 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
572 {
573 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
574
575 if((uint64_t)atom.size > (1<<30))
576 return -1;
577
578 if (st->codec->codec_id == CODEC_ID_QDM2) {
579 // pass all frma atom to codec, needed at least for QDM2
580 av_free(st->codec->extradata);
581 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
582 if (!st->codec->extradata)
583 return AVERROR(ENOMEM);
584 st->codec->extradata_size = atom.size;
585 get_buffer(pb, st->codec->extradata, atom.size);
586 } else if (atom.size > 8) { /* to read frma, esds atoms */
587 if (mov_read_default(c, pb, atom) < 0)
588 return -1;
589 } else
590 url_fskip(pb, atom.size);
591 return 0;
592 }
593
594 /**
595 * This function reads atom content and puts data in extradata without tag
596 * nor size unlike mov_read_extradata.
597 */
598 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
599 {
600 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
601
602 if((uint64_t)atom.size > (1<<30))
603 return -1;
604
605 av_free(st->codec->extradata);
606 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
607 if (!st->codec->extradata)
608 return AVERROR(ENOMEM);
609 st->codec->extradata_size = atom.size;
610 get_buffer(pb, st->codec->extradata, atom.size);
611 return 0;
612 }
613
614 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
615 {
616 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
617 MOVStreamContext *sc = st->priv_data;
618 unsigned int i, entries;
619
620 get_byte(pb); /* version */
621 get_be24(pb); /* flags */
622
623 entries = get_be32(pb);
624
625 if(entries >= UINT_MAX/sizeof(int64_t))
626 return -1;
627
628 sc->chunk_count = entries;
629 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
630 if (!sc->chunk_offsets)
631 return -1;
632 if (atom.type == MKTAG('s', 't', 'c', 'o')) {
633 for(i=0; i<entries; i++) {
634 sc->chunk_offsets[i] = get_be32(pb);
635 }
636 } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
637 for(i=0; i<entries; i++) {
638 sc->chunk_offsets[i] = get_be64(pb);
639 }
640 } else
641 return -1;
642
643 return 0;
644 }
645
646 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
647 {
648 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
649 MOVStreamContext *sc = st->priv_data;
650 int entries, frames_per_sample;
651 uint32_t format;
652 uint8_t codec_name[32];
653
654 /* for palette traversal */
655 unsigned int color_depth;
656 unsigned int color_start;
657 unsigned int color_count;
658 unsigned int color_end;
659 int color_index;
660 int color_dec;
661 int color_greyscale;
662 const uint8_t *color_table;
663 int j, pseudo_stream_id;
664 unsigned char r, g, b;
665
666 get_byte(pb); /* version */
667 get_be24(pb); /* flags */
668
669 entries = get_be32(pb);
670
671 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
672 //Parsing Sample description table
673 enum CodecID id;
674 int dref_id;
675 MOV_atom_t a = { 0, 0, 0 };
676 offset_t start_pos = url_ftell(pb);
677 int size = get_be32(pb); /* size */
678 format = get_le32(pb); /* data format */
679
680 get_be32(pb); /* reserved */
681 get_be16(pb); /* reserved */
682 dref_id = get_be16(pb);
683
684 if (st->codec->codec_tag &&
685 (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
686 : st->codec->codec_tag != MKTAG('j', 'p', 'e', 'g'))
687 ){
688 /* Multiple fourcc, we skip JPEG. This is not correct, we should
689 * export it as a separate AVStream but this needs a few changes
690 * in the MOV demuxer, patch welcome. */
691 url_fskip(pb, size - (url_ftell(pb) - start_pos));
692 continue;
693 }
694 sc->pseudo_stream_id= pseudo_stream_id;
695 sc->dref_id= dref_id;
696
697 st->codec->codec_tag = format;
698 id = codec_get_id(codec_movaudio_tags, format);
699 if (id<=0 && (format&0xFFFF) == 'm' + ('s'<<8))
700 id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
701
702 if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
703 st->codec->codec_type = CODEC_TYPE_AUDIO;
704 } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
705 format && format != MKTAG('m', 'p', '4', 's')) { /* skip old asf mpeg4 tag */
706 id = codec_get_id(codec_movvideo_tags, format);
707 if (id <= 0)
708 id = codec_get_id(codec_bmp_tags, format);
709 if (id > 0)
710 st->codec->codec_type = CODEC_TYPE_VIDEO;
711 else if(st->codec->codec_type == CODEC_TYPE_DATA){
712 id = codec_get_id(ff_codec_movsubtitle_tags, format);
713 if(id > 0)
714 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
715 }
716 }
717
718 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
719 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
720 (format >> 24) & 0xff, st->codec->codec_type);
721
722 if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
723 st->codec->codec_id = id;
724 get_be16(pb); /* version */
725 get_be16(pb); /* revision level */
726 get_be32(pb); /* vendor */
727 get_be32(pb); /* temporal quality */
728 get_be32(pb); /* spatial quality */
729
730 st->codec->width = get_be16(pb); /* width */
731 st->codec->height = get_be16(pb); /* height */
732
733 get_be32(pb); /* horiz resolution */
734 get_be32(pb); /* vert resolution */
735 get_be32(pb); /* data size, always 0 */
736 frames_per_sample = get_be16(pb); /* frames per samples */
737
738 dprintf(c->fc, "frames/samples = %d\n", frames_per_sample);
739
740 get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
741 if (codec_name[0] <= 31) {
742 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
743 st->codec->codec_name[codec_name[0]] = 0;
744 }
745
746 st->codec->bits_per_sample = get_be16(pb); /* depth */
747 st->codec->color_table_id = get_be16(pb); /* colortable id */
748 dprintf(c->fc, "depth %d, ctab id %d\n",
749 st->codec->bits_per_sample, st->codec->color_table_id);
750 /* figure out the palette situation */
751 color_depth = st->codec->bits_per_sample & 0x1F;
752 color_greyscale = st->codec->bits_per_sample & 0x20;
753
754 /* if the depth is 2, 4, or 8 bpp, file is palettized */
755 if ((color_depth == 2) || (color_depth == 4) ||
756 (color_depth == 8)) {
757 if (color_greyscale) {
758 /* compute the greyscale palette */
759 st->codec->bits_per_sample = color_depth;
760 color_count = 1 << color_depth;
761 color_index = 255;
762 color_dec = 256 / (color_count - 1);
763 for (j = 0; j < color_count; j++) {
764 r = g = b = color_index;
765 c->palette_control.palette[j] =
766 (r << 16) | (g << 8) | (b);
767 color_index -= color_dec;
768 if (color_index < 0)
769 color_index = 0;
770 }
771 } else if (st->codec->color_table_id) {
772 /* if flag bit 3 is set, use the default palette */
773 color_count = 1 << color_depth;
774 if (color_depth == 2)
775 color_table = ff_qt_default_palette_4;
776 else if (color_depth == 4)
777 color_table = ff_qt_default_palette_16;
778 else
779 color_table = ff_qt_default_palette_256;
780
781 for (j = 0; j < color_count; j++) {
782 r = color_table[j * 4 + 0];
783 g = color_table[j * 4 + 1];
784 b = color_table[j * 4 + 2];
785 c->palette_control.palette[j] =
786 (r << 16) | (g << 8) | (b);
787 }
788 } else {
789 /* load the palette from the file */
790 color_start = get_be32(pb);
791 color_count = get_be16(pb);
792 color_end = get_be16(pb);
793 if ((color_start <= 255) &&
794 (color_end <= 255)) {
795 for (j = color_start; j <= color_end; j++) {
796 /* each R, G, or B component is 16 bits;
797 * only use the top 8 bits; skip alpha bytes
798 * up front */
799 get_byte(pb);
800 get_byte(pb);
801 r = get_byte(pb);
802 get_byte(pb);
803 g = get_byte(pb);
804 get_byte(pb);
805 b = get_byte(pb);
806 get_byte(pb);
807 c->palette_control.palette[j] =
808 (r << 16) | (g << 8) | (b);
809 }
810 }
811 }
812 st->codec->palctrl = &c->palette_control;
813 st->codec->palctrl->palette_changed = 1;
814 } else
815 st->codec->palctrl = NULL;
816 } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
817 int bits_per_sample;
818 uint16_t version = get_be16(pb);
819
820 st->codec->codec_id = id;
821 get_be16(pb); /* revision level */
822 get_be32(pb); /* vendor */
823
824 st->codec->channels = get_be16(pb); /* channel count */
825 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
826 st->codec->bits_per_sample = get_be16(pb); /* sample size */
827
828 sc->audio_cid = get_be16(pb);
829 get_be16(pb); /* packet size = 0 */
830
831 st->codec->sample_rate = ((get_be32(pb) >> 16));
832
833 switch (st->codec->codec_id) {
834 case CODEC_ID_PCM_S8:
835 case CODEC_ID_PCM_U8:
836 if (st->codec->bits_per_sample == 16)
837 st->codec->codec_id = CODEC_ID_PCM_S16BE;
838 break;
839 case CODEC_ID_PCM_S16LE:
840 case CODEC_ID_PCM_S16BE:
841 if (st->codec->bits_per_sample == 8)
842 st->codec->codec_id = CODEC_ID_PCM_S8;
843 else if (st->codec->bits_per_sample == 24)
844 st->codec->codec_id = CODEC_ID_PCM_S24BE;
845 break;
846 /* set values for old format before stsd version 1 appeared */
847 case CODEC_ID_MACE3:
848 sc->samples_per_frame = 6;
849 sc->bytes_per_frame = 2*st->codec->channels;
850 break;
851 case CODEC_ID_MACE6:
852 sc->samples_per_frame = 6;
853 sc->bytes_per_frame = 1*st->codec->channels;
854 break;
855 case CODEC_ID_ADPCM_IMA_QT:
856 sc->samples_per_frame = 64;
857 sc->bytes_per_frame = 34*st->codec->channels;
858 break;
859 default:
860 break;
861 }
862
863 //Read QT version 1 fields. In version 0 these do not exist.
864 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
865 if(!c->isom) {
866 if(version==1) {
867 sc->samples_per_frame = get_be32(pb);
868 get_be32(pb); /* bytes per packet */
869 sc->bytes_per_frame = get_be32(pb);
870 get_be32(pb); /* bytes per sample */
871 } else if(version==2) {
872 get_be32(pb); /* sizeof struct only */
873 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
874 st->codec->channels = get_be32(pb);
875 get_be32(pb); /* always 0x7F000000 */
876 get_be32(pb); /* bits per channel if sound is uncompressed */
877 get_be32(pb); /* lcpm format specific flag */
878 get_be32(pb); /* bytes per audio packet if constant */
879 get_be32(pb); /* lpcm frames per audio packet if constant */
880 }
881 }
882
883 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
884 if (bits_per_sample) {
885 st->codec->bits_per_sample = bits_per_sample;
886 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
887 }
888 } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
889 st->codec->codec_id= id;
890 } else {
891 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
892 url_fskip(pb, size - (url_ftell(pb) - start_pos));
893 }
894 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
895 a.size = size - (url_ftell(pb) - start_pos);
896 if (a.size > 8) {
897 if (mov_read_default(c, pb, a) < 0)
898 return -1;
899 } else if (a.size > 0)
900 url_fskip(pb, a.size);
901 }
902
903 if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
904 st->codec->sample_rate= sc->time_scale;
905
906 /* special codec parameters handling */
907 switch (st->codec->codec_id) {
908 #ifdef CONFIG_DV_DEMUXER
909 case CODEC_ID_DVAUDIO:
910 c->dv_fctx = av_alloc_format_context();
911 c->dv_demux = dv_init_demux(c->dv_fctx);
912 if (!c->dv_demux) {
913 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
914 return -1;
915 }
916 sc->dv_audio_container = 1;
917 st->codec->codec_id = CODEC_ID_PCM_S16LE;
918 break;
919 #endif
920 /* no ifdef since parameters are always those */
921 case CODEC_ID_AMR_WB:
922 st->codec->sample_rate= 16000;
923 st->codec->channels= 1; /* really needed */
924 break;
925 case CODEC_ID_AMR_NB:
926 st->codec->sample_rate= 8000;
927 st->codec->channels= 1; /* really needed */
928 break;
929 case CODEC_ID_MP2:
930 case CODEC_ID_MP3:
931 st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
932 st->need_parsing = AVSTREAM_PARSE_FULL;
933 break;
934 case CODEC_ID_GSM:
935 case CODEC_ID_ADPCM_MS:
936 case CODEC_ID_ADPCM_IMA_WAV:
937 st->codec->block_align = sc->bytes_per_frame;
938 break;
939 default:
940 break;
941 }
942
943 return 0;
944 }
945
946 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
947 {
948 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
949 MOVStreamContext *sc = st->priv_data;
950 unsigned int i, entries;
951
952 get_byte(pb); /* version */
953 get_be24(pb); /* flags */
954
955 entries = get_be32(pb);
956
957 if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
958 return -1;
959
960 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
961
962 sc->sample_to_chunk_sz = entries;
963 sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
964 if (!sc->sample_to_chunk)
965 return -1;
966 for(i=0; i<entries; i++) {
967 sc->sample_to_chunk[i].first = get_be32(pb);
968 sc->sample_to_chunk[i].count = get_be32(pb);
969 sc->sample_to_chunk[i].id = get_be32(pb);
970 }
971 return 0;
972 }
973
974 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
975 {
976 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
977 MOVStreamContext *sc = st->priv_data;
978 unsigned int i, entries;
979
980 get_byte(pb); /* version */
981 get_be24(pb); /* flags */
982
983 entries = get_be32(pb);
984
985 if(entries >= UINT_MAX / sizeof(int))
986 return -1;
987
988 sc->keyframe_count = entries;
989
990 dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
991
992 sc->keyframes = av_malloc(entries * sizeof(int));
993 if (!sc->keyframes)
994 return -1;
995 for(i=0; i<entries; i++) {
996 sc->keyframes[i] = get_be32(pb);
997 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
998 }
999 return 0;
1000 }
1001
1002 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1003 {
1004 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1005 MOVStreamContext *sc = st->priv_data;
1006 unsigned int i, entries, sample_size;
1007
1008 get_byte(pb); /* version */
1009 get_be24(pb); /* flags */
1010
1011 sample_size = get_be32(pb);
1012 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1013 sc->sample_size = sample_size;
1014 entries = get_be32(pb);
1015 if(entries >= UINT_MAX / sizeof(int))
1016 return -1;
1017
1018 sc->sample_count = entries;
1019 if (sample_size)
1020 return 0;
1021
1022 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1023
1024 sc->sample_sizes = av_malloc(entries * sizeof(int));
1025 if (!sc->sample_sizes)
1026 return -1;
1027 for(i=0; i<entries; i++)
1028 sc->sample_sizes[i] = get_be32(pb);
1029 return 0;
1030 }
1031
1032 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1033 {
1034 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1035 MOVStreamContext *sc = st->priv_data;
1036 unsigned int i, entries;
1037 int64_t duration=0;
1038 int64_t total_sample_count=0;
1039
1040 get_byte(pb); /* version */
1041 get_be24(pb); /* flags */
1042 entries = get_be32(pb);
1043 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1044 return -1;
1045
1046 sc->stts_count = entries;
1047 sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1048 if (!sc->stts_data)
1049 return -1;
1050 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1051
1052 sc->time_rate=0;
1053
1054 for(i=0; i<entries; i++) {
1055 int sample_duration;
1056 int sample_count;
1057
1058 sample_count=get_be32(pb);
1059 sample_duration = get_be32(pb);
1060 sc->stts_data[i].count= sample_count;
1061 sc->stts_data[i].duration= sample_duration;
1062
1063 sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1064
1065 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1066
1067 duration+=(int64_t)sample_duration*sample_count;
1068 total_sample_count+=sample_count;
1069 }
1070
1071 st->nb_frames= total_sample_count;
1072 if(duration)
1073 st->duration= duration;
1074 return 0;
1075 }
1076
1077 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1078 {
1079 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1080 MOVStreamContext *sc = st->priv_data;
1081 unsigned int i, entries;
1082
1083 get_byte(pb); /* version */
1084 get_be24(pb); /* flags */
1085 entries = get_be32(pb);
1086 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1087 return -1;
1088
1089 sc->ctts_count = entries;
1090 sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1091 if (!sc->ctts_data)
1092 return -1;
1093 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1094
1095 for(i=0; i<entries; i++) {
1096 int count =get_be32(pb);
1097 int duration =get_be32(pb);
1098
1099 if (duration < 0) {
1100 av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1101 sc->ctts_count = 0;
1102 url_fskip(pb, 8 * (entries - i - 1));
1103 break;
1104 }
1105 sc->ctts_data[i].count = count;
1106 sc->ctts_data[i].duration= duration;
1107
1108 sc->time_rate= ff_gcd(sc->time_rate, duration);
1109 }
1110 return 0;
1111 }
1112
1113 static void mov_build_index(MOVContext *mov, AVStream *st)
1114 {
1115 MOVStreamContext *sc = st->priv_data;
1116 offset_t current_offset;
1117 int64_t current_dts = 0;
1118 unsigned int stts_index = 0;
1119 unsigned int stsc_index = 0;
1120 unsigned int stss_index = 0;
1121 unsigned int i, j;
1122
1123 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1124 if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1125 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1126 unsigned int current_sample = 0;
1127 unsigned int stts_sample = 0;
1128 unsigned int keyframe, sample_size;
1129 unsigned int distance = 0;
1130 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1131
1132 st->nb_frames = sc->sample_count;
1133 for (i = 0; i < sc->chunk_count; i++) {
1134 current_offset = sc->chunk_offsets[i];
1135 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1136 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1137 stsc_index++;
1138 for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1139 if (current_sample >= sc->sample_count) {
1140 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1141 goto out;
1142 }
1143 keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1144 if (keyframe) {
1145 distance = 0;
1146 if (stss_index + 1 < sc->keyframe_count)
1147 stss_index++;
1148 }
1149 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1150 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1151 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1152 current_offset, current_dts, sample_size, distance, keyframe);
1153 if(sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id)
1154 av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1155 keyframe ? AVINDEX_KEYFRAME : 0);
1156 current_offset += sample_size;
1157 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1158 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1159 distance++;
1160 stts_sample++;
1161 current_sample++;
1162 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1163 stts_sample = 0;
1164 stts_index++;
1165 }
1166 }
1167 }
1168 } else { /* read whole chunk */
1169 unsigned int chunk_samples, chunk_size, chunk_duration;
1170 unsigned int frames = 1;
1171 for (i = 0; i < sc->chunk_count; i++) {
1172 current_offset = sc->chunk_offsets[i];
1173 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1174 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1175 stsc_index++;
1176 chunk_samples = sc->sample_to_chunk[stsc_index].count;
1177 /* get chunk size, beware of alaw/ulaw/mace */
1178 if (sc->samples_per_frame > 0 &&
1179 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1180 if (sc->samples_per_frame < 1024)
1181 chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1182 else {
1183 chunk_size = sc->bytes_per_frame;
1184 frames = chunk_samples / sc->samples_per_frame;
1185 chunk_samples = sc->samples_per_frame;
1186 }
1187 } else
1188 chunk_size = chunk_samples * sc->sample_size;
1189 for (j = 0; j < frames; j++) {
1190 av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1191 /* get chunk duration */
1192 chunk_duration = 0;
1193 while (chunk_samples > 0) {
1194 if (chunk_samples < sc->stts_data[stts_index].count) {
1195 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1196 sc->stts_data[stts_index].count -= chunk_samples;
1197 break;
1198 } else {
1199 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1200 chunk_samples -= sc->stts_data[stts_index].count;
1201 if (stts_index + 1 < sc->stts_count)
1202 stts_index++;
1203 }
1204 }
1205 current_offset += sc->bytes_per_frame;
1206 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1207 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1208 chunk_size, chunk_duration);
1209 assert(chunk_duration % sc->time_rate == 0);
1210 current_dts += chunk_duration / sc->time_rate;
1211 }
1212 }
1213 }
1214 out:
1215 /* adjust sample count to avindex entries */
1216 sc->sample_count = st->nb_index_entries;
1217 }
1218
1219 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1220 {
1221 AVStream *st;
1222 MOVStreamContext *sc;
1223 int ret;
1224
1225 st = av_new_stream(c->fc, c->fc->nb_streams);
1226 if (!st) return AVERROR(ENOMEM);
1227 sc = av_mallocz(sizeof(MOVStreamContext));
1228 if (!sc) return AVERROR(ENOMEM);
1229
1230 st->priv_data = sc;
1231 st->codec->codec_type = CODEC_TYPE_DATA;
1232 st->start_time = 0; /* XXX: check */
1233
1234 if ((ret = mov_read_default(c, pb, atom)) < 0)
1235 return ret;
1236
1237 /* sanity checks */
1238 if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1239 (!sc->sample_size && !sc->sample_count))){
1240 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1241 st->index);
1242 sc->sample_count = 0; //ignore track
1243 return 0;
1244 }
1245 if(!sc->time_rate)
1246 sc->time_rate=1;
1247 if(!sc->time_scale)
1248 sc->time_scale= c->time_scale;
1249 av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1250
1251 if (st->codec->codec_type == CODEC_TYPE_AUDIO && sc->stts_count == 1)
1252 st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1253
1254 if(st->duration != AV_NOPTS_VALUE){
1255 assert(st->duration % sc->time_rate == 0);
1256 st->duration /= sc->time_rate;
1257 }
1258 sc->ffindex = st->index;
1259 mov_build_index(c, st);
1260
1261 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1262 if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1263 av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1264 st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1265 } else
1266 sc->pb = c->fc->pb;
1267
1268 switch (st->codec->codec_id) {
1269 #ifdef CONFIG_H261_DECODER
1270 case CODEC_ID_H261:
1271 #endif
1272 #ifdef CONFIG_H263_DECODER
1273 case CODEC_ID_H263:
1274 #endif
1275 #ifdef CONFIG_MPEG4_DECODER
1276 case CODEC_ID_MPEG4:
1277 #endif
1278 st->codec->width= 0; /* let decoder init width/height */
1279 st->codec->height= 0;
1280 break;
1281 #ifdef CONFIG_LIBFAAD
1282 case CODEC_ID_AAC:
1283 #endif
1284 #ifdef CONFIG_VORBIS_DECODER
1285 case CODEC_ID_VORBIS:
1286 #endif
1287 case CODEC_ID_MP3ON4:
1288 st->codec->sample_rate= 0; /* let decoder init parameters properly */
1289 break;
1290 }
1291
1292 /* Do not need those anymore. */
1293 av_freep(&sc->chunk_offsets);
1294 av_freep(&sc->sample_to_chunk);
1295 av_freep(&sc->sample_sizes);
1296 av_freep(&sc->keyframes);
1297 av_freep(&sc->stts_data);
1298
1299 return 0;
1300 }
1301
1302 static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1303 {
1304 uint16_t str_size = get_be16(pb); /* string length */;
1305
1306 get_be16(pb); /* skip language */
1307 get_buffer(pb, str, FFMIN(size, str_size));
1308 }
1309
1310 static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1311 {
1312 uint64_t end = url_ftell(pb) + atom.size;
1313
1314 while (url_ftell(pb) + 8 < end) {
1315 uint32_t tag_size = get_be32(pb);
1316 uint32_t tag = get_le32(pb);
1317 uint64_t next = url_ftell(pb) + tag_size - 8;
1318
1319 if (next > end) // stop if tag_size is wrong
1320 break;
1321
1322 switch (tag) {
1323 case MKTAG(0xa9,'n','a','m'):
1324 mov_parse_udta_string(pb, c->fc->title, sizeof(c->fc->title));
1325 break;
1326 case MKTAG(0xa9,'w','r','t'):
1327 mov_parse_udta_string(pb, c->fc->author, sizeof(c->fc->author));
1328 break;
1329 case MKTAG(0xa9,'c','p','y'):
1330 mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1331 break;
1332 case MKTAG(0xa9,'i','n','f'):
1333 mov_parse_udta_string(pb, c->fc->comment, sizeof(c->fc->comment));
1334 break;
1335 default:
1336 break;
1337 }
1338
1339 url_fseek(pb, next, SEEK_SET);
1340 }
1341
1342 return 0;
1343 }
1344
1345 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1346 {
1347 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1348 int version = get_byte(pb);
1349
1350 get_be24(pb); /* flags */
1351 /*
1352 MOV_TRACK_ENABLED 0x0001
1353 MOV_TRACK_IN_MOVIE 0x0002
1354 MOV_TRACK_IN_PREVIEW 0x0004
1355 MOV_TRACK_IN_POSTER 0x0008
1356 */
1357
1358 if (version == 1) {
1359 get_be64(pb);
1360 get_be64(pb);
1361 } else {
1362 get_be32(pb); /* creation time */
1363 get_be32(pb); /* modification time */
1364 }
1365 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1366 get_be32(pb); /* reserved */
1367 st->start_time = 0; /* check */
1368 /* highlevel (considering edits) duration in movie timebase */
1369 (version == 1) ? get_be64(pb) : get_be32(pb);
1370 get_be32(pb); /* reserved */
1371 get_be32(pb); /* reserved */
1372
1373 get_be16(pb); /* layer */
1374 get_be16(pb); /* alternate group */
1375 get_be16(pb); /* volume */
1376 get_be16(pb); /* reserved */
1377
1378 url_fskip(pb, 36); /* display matrix */
1379
1380 /* those are fixed-point */
1381 get_be32(pb); /* track width */
1382 get_be32(pb); /* track height */
1383
1384 return 0;
1385 }
1386
1387 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1388 {
1389 MOVFragment *frag = &c->fragment;
1390 MOVTrackExt *trex = NULL;
1391 int flags, track_id, i;
1392
1393 get_byte(pb); /* version */
1394 flags = get_be24(pb);
1395
1396 track_id = get_be32(pb);
1397 if (!track_id || track_id > c->fc->nb_streams)
1398 return -1;
1399 frag->track_id = track_id;
1400 for (i = 0; i < c->trex_count; i++)
1401 if (c->trex_data[i].track_id == frag->track_id) {
1402 trex = &c->trex_data[i];
1403 break;
1404 }
1405 if (!trex) {
1406 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1407 return -1;
1408 }
1409
1410 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1411 else frag->base_data_offset = frag->moof_offset;
1412 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1413 else frag->stsd_id = trex->stsd_id;
1414
1415 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1416 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1417 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1418 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1419 return 0;
1420 }
1421
1422 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1423 {
1424 MOVTrackExt *trex;
1425
1426 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1427 return -1;
1428 c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1429 if (!c->trex_data)
1430 return AVERROR(ENOMEM);
1431 trex = &c->trex_data[c->trex_count++];
1432 get_byte(pb); /* version */
1433 get_be24(pb); /* flags */
1434 trex->track_id = get_be32(pb);
1435 trex->stsd_id = get_be32(pb);
1436 trex->duration = get_be32(pb);
1437 trex->size = get_be32(pb);
1438 trex->flags = get_be32(pb);
1439 return 0;
1440 }
1441
1442 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1443 {
1444 MOVFragment *frag = &c->fragment;
1445 AVStream *st;
1446 MOVStreamContext *sc;
1447 uint64_t offset;
1448 int64_t dts;
1449 int data_offset = 0;
1450 unsigned entries, first_sample_flags = frag->flags;
1451 int flags, distance, i;
1452
1453 if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1454 return -1;
1455 st = c->fc->streams[frag->track_id-1];
1456 sc = st->priv_data;
1457 if (sc->pseudo_stream_id+1 != frag->stsd_id)
1458 return 0;
1459 get_byte(pb); /* version */
1460 flags = get_be24(pb);
1461 entries = get_be32(pb);
1462 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1463 if (flags & 0x001) data_offset = get_be32(pb);
1464 if (flags & 0x004) first_sample_flags = get_be32(pb);
1465 if (flags & 0x800) {
1466 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1467 return -1;
1468 sc->ctts_data = av_realloc(sc->ctts_data,
1469 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1470 if (!sc->ctts_data)
1471 return AVERROR(ENOMEM);
1472 }
1473 dts = st->duration;
1474 offset = frag->base_data_offset + data_offset;
1475 distance = 0;
1476 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1477 for (i = 0; i < entries; i++) {
1478 unsigned sample_size = frag->size;
1479 int sample_flags = i ? frag->flags : first_sample_flags;
1480 unsigned sample_duration = frag->duration;
1481 int keyframe;
1482
1483 if (flags & 0x100) sample_duration = get_be32(pb);
1484 if (flags & 0x200) sample_size = get_be32(pb);
1485 if (flags & 0x400) sample_flags = get_be32(pb);
1486 if (flags & 0x800) {
1487 sc->ctts_data[sc->ctts_count].count = 1;
1488 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1489 sc->ctts_count++;
1490 }
1491 if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1492 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1493 distance = 0;
1494 av_add_index_entry(st, offset, dts, sample_size, distance,
1495 keyframe ? AVINDEX_KEYFRAME : 0);
1496 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1497 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1498 offset, dts, sample_size, distance, keyframe);
1499 distance++;
1500 assert(sample_duration % sc->time_rate == 0);
1501 dts += sample_duration / sc->time_rate;
1502 offset += sample_size;
1503 }
1504 frag->moof_offset = offset;
1505 sc->sample_count = st->nb_index_entries;
1506 st->duration = dts;
1507 return 0;
1508 }
1509
1510 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1511 /* like the files created with Adobe Premiere 5.0, for samples see */
1512 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1513 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1514 {
1515 int err;
1516
1517 if (atom.size < 8)
1518 return 0; /* continue */
1519 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1520 url_fskip(pb, atom.size - 4);
1521 return 0;
1522 }
1523 atom.type = get_le32(pb);
1524 atom.offset += 8;
1525 atom.size -= 8;
1526 if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1527 url_fskip(pb, atom.size);
1528 return 0;
1529 }
1530 err = mov_read_mdat(c, pb, atom);
1531 return err;
1532 }
1533
1534 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1535 {
1536 #ifdef CONFIG_ZLIB
1537 ByteIOContext ctx;
1538 uint8_t *cmov_data;
1539 uint8_t *moov_data; /* uncompressed data */
1540 long cmov_len, moov_len;
1541 int ret;
1542
1543 get_be32(pb); /* dcom atom */
1544 if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1545 return -1;
1546 if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1547 av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1548 return -1;
1549 }
1550 get_be32(pb); /* cmvd atom */
1551 if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1552 return -1;
1553 moov_len = get_be32(pb); /* uncompressed size */
1554 cmov_len = atom.size - 6 * 4;
1555
1556 cmov_data = av_malloc(cmov_len);
1557 if (!cmov_data)
1558 return -1;
1559 moov_data = av_malloc(moov_len);
1560 if (!moov_data) {
1561 av_free(cmov_data);
1562 return -1;
1563 }
1564 get_buffer(pb, cmov_data, cmov_len);
1565 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1566 return -1;
1567 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1568 return -1;
1569 atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1570 atom.offset = 0;
1571 atom.size = moov_len;
1572 #ifdef DEBUG
1573 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1574 #endif
1575 ret = mov_read_default(c, &ctx, atom);
1576 av_free(moov_data);
1577 av_free(cmov_data);
1578 return ret;
1579 #else
1580 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1581 return -1;
1582 #endif
1583 }
1584
1585 /* edit list atom */
1586 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1587 {
1588 MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1589 int i, edit_count;
1590
1591 get_byte(pb); /* version */
1592 get_be24(pb); /* flags */
1593 edit_count= sc->edit_count = get_be32(pb); /* entries */
1594
1595 for(i=0; i<edit_count; i++){
1596 int time;
1597 get_be32(pb); /* Track duration */
1598 time = get_be32(pb); /* Media time */
1599 get_be32(pb); /* Media rate */
1600 if (time != 0)
1601 av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1602 "a/v desync might occur, patch welcome\n");
1603 }
1604 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1605 return 0;
1606 }
1607
1608 static const MOVParseTableEntry mov_default_parse_table[] = {
1609 { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1610 { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1611 { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default },
1612 { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_dref },
1613 { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1614 { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1615 { MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },
1616 { MKTAG( 'f', 'i', 'e', 'l' ), mov_read_extradata },
1617 { MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },
1618 { MKTAG( 'g', 'l', 'b', 'l' ), mov_read_glbl },
1619 { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1620 { MKTAG( 'j', 'p', '2', 'h' ), mov_read_extradata },
1621 { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1622 { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1623 { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1624 { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1625 { MKTAG( 'm', 'o', 'o', 'f' ), mov_read_moof },
1626 { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1627 { MKTAG( 'm', 'v', 'e', 'x' ), mov_read_default },
1628 { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1629 { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1630 { MKTAG( 'a', 'l', 'a', 'c' ), mov_read_extradata }, /* alac specific atom */
1631 { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_glbl },
1632 { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1633 { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1634 { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1635 { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1636 { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1637 { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1638 { MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1639 { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1640 { MKTAG( 't', 'f', 'h', 'd' ), mov_read_tfhd }, /* track fragment header */
1641 { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1642 { MKTAG( 't', 'r', 'a', 'f' ), mov_read_default },
1643 { MKTAG( 't', 'r', 'e', 'x' ), mov_read_trex },
1644 { MKTAG( 't', 'r', 'u', 'n' ), mov_read_trun },
1645 { MKTAG( 'u', 'd', 't', 'a' ), mov_read_udta },
1646 { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },
1647 { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1648 { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1649 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1650 { 0, NULL }
1651 };
1652
1653 static int mov_probe(AVProbeData *p)
1654 {
1655 unsigned int offset;
1656 uint32_t tag;
1657 int score = 0;
1658
1659 /* check file header */
1660 offset = 0;
1661 for(;;) {
1662 /* ignore invalid offset */
1663 if ((offset + 8) > (unsigned int)p->buf_size)
1664 return score;
1665 tag = AV_RL32(p->buf + offset + 4);
1666 switch(tag) {
1667 /* check for obvious tags */
1668 case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */
1669 case MKTAG( 'm', 'o', 'o', 'v' ):
1670 case MKTAG( 'm', 'd', 'a', 't' ):
1671 case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1672 case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1673 return AVPROBE_SCORE_MAX;
1674 /* those are more common words, so rate then a bit less */
1675 case MKTAG( 'e', 'd', 'i', 'w' ): /* xdcam files have reverted first tags */
1676 case MKTAG( 'w', 'i', 'd', 'e' ):
1677 case MKTAG( 'f', 'r', 'e', 'e' ):
1678 case MKTAG( 'j', 'u', 'n', 'k' ):
1679 case MKTAG( 'p', 'i', 'c', 't' ):
1680 return AVPROBE_SCORE_MAX - 5;
1681 case MKTAG(0x82,0x82,0x7f,0x7d ):
1682 case MKTAG( 'f', 't', 'y', 'p' ):
1683 case MKTAG( 's', 'k', 'i', 'p' ):
1684 case MKTAG( 'u', 'u', 'i', 'd' ):
1685 offset = AV_RB32(p->buf+offset) + offset;
1686 /* if we only find those cause probedata is too small at least rate them */
1687 score = AVPROBE_SCORE_MAX - 50;
1688 break;
1689 default:
1690 /* unrecognized tag */
1691 return score;
1692 }
1693 }
1694 return score;
1695 }
1696
1697 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1698 {
1699 MOVContext *mov = s->priv_data;
1700 ByteIOContext *pb = s->pb;
1701 int err;
1702 MOV_atom_t atom = { 0, 0, 0 };
1703
1704 mov->fc = s;
1705 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1706 if(!url_is_streamed(pb))
1707 atom.size = url_fsize(pb);
1708 else
1709 atom.size = INT64_MAX;
1710
1711 /* check MOV header */
1712 if ((err = mov_read_default(mov, pb, atom)) < 0) {
1713 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1714 return err;
1715 }
1716 if (!mov->found_moov) {
1717 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1718 return -1;
1719 }
1720 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1721
1722 return 0;
1723 }
1724
1725 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1726 {
1727 MOVContext *mov = s->priv_data;
1728 MOVStreamContext *sc = 0;
1729 AVIndexEntry *sample = 0;
1730 int64_t best_dts = INT64_MAX;
1731 int i;
1732 retry:
1733 for (i = 0; i < s->nb_streams; i++) {
1734 AVStream *st = s->streams[i];
1735 MOVStreamContext *msc = st->priv_data;
1736 if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1737 AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1738 int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1739 AV_TIME_BASE, msc->time_scale);
1740 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1741 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1742 (!url_is_streamed(s->pb) &&
1743 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1744 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1745 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1746 sample = current_sample;
1747 best_dts = dts;
1748 sc = msc;
1749 }
1750 }
1751 }
1752 if (!sample) {
1753 mov->found_mdat = 0;
1754 if (!url_is_streamed(s->pb) ||
1755 mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1756 url_feof(s->pb))
1757 return -1;
1758 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1759 goto retry;
1760 }
1761 /* must be done just before reading, to avoid infinite loop on sample */
1762 sc->current_sample++;
1763 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1764 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1765 sc->ffindex, sample->pos);
1766 return -1;
1767 }
1768 av_get_packet(sc->pb, pkt, sample->size);
1769 #ifdef CONFIG_DV_DEMUXER
1770 if (mov->dv_demux && sc->dv_audio_container) {
1771 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1772 av_free(pkt->data);
1773 pkt->size = 0;
1774 if (dv_get_packet(mov->dv_demux, pkt) < 0)
1775 return -1;
1776 }
1777 #endif
1778 pkt->stream_index = sc->ffindex;
1779 pkt->dts = sample->timestamp;
1780 if (sc->ctts_data) {
1781 assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1782 pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1783 /* update ctts context */
1784 sc->sample_to_ctime_sample++;
1785 if (sc->sample_to_ctime_index < sc->ctts_count &&
1786 sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1787 sc->sample_to_ctime_index++;
1788 sc->sample_to_ctime_sample = 0;
1789 }
1790 } else {
1791 pkt->pts = pkt->dts;
1792 }
1793 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1794 pkt->pos = sample->pos;
1795 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1796 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1797 return 0;
1798 }
1799
1800 static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1801 {
1802 MOVStreamContext *sc = st->priv_data;
1803 int sample, time_sample;
1804 int i;
1805
1806 sample = av_index_search_timestamp(st, timestamp, flags);
1807 dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1808 if (sample < 0) /* not sure what to do */
1809 return -1;
1810 sc->current_sample = sample;
1811 dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1812 /* adjust ctts index */
1813 if (sc->ctts_data) {
1814 time_sample = 0;
1815 for (i = 0; i < sc->ctts_count; i++) {
1816 int next = time_sample + sc->ctts_data[i].count;
1817 if (next > sc->current_sample) {
1818 sc->sample_to_ctime_index = i;
1819 sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1820 break;
1821 }
1822 time_sample = next;
1823 }
1824 }
1825 return sample;
1826 }
1827
1828 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1829 {
1830 AVStream *st;
1831 int64_t seek_timestamp, timestamp;
1832 int sample;
1833 int i;
1834
1835 if (stream_index >= s->nb_streams)
1836 return -1;
1837
1838 st = s->streams[stream_index];
1839 sample = mov_seek_stream(st, sample_time, flags);
1840 if (sample < 0)
1841 return -1;
1842
1843 /* adjust seek timestamp to found sample timestamp */
1844 seek_timestamp = st->index_entries[sample].timestamp;
1845
1846 for (i = 0; i < s->nb_streams; i++) {
1847 st = s->streams[i];
1848 if (stream_index == i || st->discard == AVDISCARD_ALL)
1849 continue;
1850
1851 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1852 mov_seek_stream(st, timestamp, flags);
1853 }
1854 return 0;
1855 }
1856
1857 static int mov_read_close(AVFormatContext *s)
1858 {
1859 int i, j;
1860 MOVContext *mov = s->priv_data;
1861 for(i=0; i<s->nb_streams; i++) {
1862 MOVStreamContext *sc = s->streams[i]->priv_data;
1863 av_freep(&sc->ctts_data);
1864 for (j=0; j<sc->drefs_count; j++)
1865 av_freep(&sc->drefs[j].path);
1866 av_freep(&sc->drefs);
1867 if (sc->pb && sc->pb != s->pb)
1868 url_fclose(sc->pb);
1869 }
1870 if(mov->dv_demux){
1871 for(i=0; i<mov->dv_fctx->nb_streams; i++){
1872 av_freep(&mov->dv_fctx->streams[i]->codec);
1873 av_freep(&mov->dv_fctx->streams[i]);
1874 }
1875 av_freep(&mov->dv_fctx);
1876 av_freep(&mov->dv_demux);
1877 }
1878 av_freep(&mov->trex_data);
1879 return 0;
1880 }
1881
1882 AVInputFormat mov_demuxer = {
1883 "mov,mp4,m4a,3gp,3g2,mj2",
1884 "QuickTime/MPEG4/Motion JPEG 2000 format",
1885 sizeof(MOVContext),
1886 mov_probe,
1887 mov_read_header,
1888 mov_read_packet,
1889 mov_read_close,
1890 mov_read_seek,
1891 };