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Rename var: val -> energy
[FFMpeg-mirror/DVCPRO-HD.git] / libavformat / mov.c
blobeca6a411f821ae1b3bd3e5214cf8b1a374792c65
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 #include "libavcodec/mpeg4audio.h"
31 #include "libavcodec/mpegaudiodata.h"
32
33 #ifdef CONFIG_ZLIB
34 #include <zlib.h>
35 #endif
36
37 /*
38 * First version by Francois Revol revol@free.fr
39 * Seek function by Gael Chardon gael.dev@4now.net
40 *
41 * Features and limitations:
42 * - reads most of the QT files I have (at least the structure),
43 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
44 * - the code is quite ugly... maybe I won't do it recursive next time :-)
45 *
46 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
47 * when coding this :) (it's a writer anyway)
48 *
49 * Reference documents:
50 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
51 * Apple:
52 * http://developer.apple.com/documentation/QuickTime/QTFF/
53 * http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
54 * QuickTime is a trademark of Apple (AFAIK :))
55 */
56
57 #include "qtpalette.h"
58
59
60 #undef NDEBUG
61 #include <assert.h>
62
63 /* the QuickTime file format is quite convoluted...
64 * it has lots of index tables, each indexing something in another one...
65 * Here we just use what is needed to read the chunks
66 */
67
68 typedef struct {
69 int first;
70 int count;
71 int id;
72 } MOV_stsc_t;
73
74 typedef struct {
75 uint32_t type;
76 char *path;
77 } MOV_dref_t;
78
79 typedef struct {
80 uint32_t type;
81 int64_t offset;
82 int64_t size; /* total size (excluding the size and type fields) */
83 } MOV_atom_t;
84
85 struct MOVParseTableEntry;
86
87 typedef struct {
88 unsigned track_id;
89 uint64_t base_data_offset;
90 uint64_t moof_offset;
91 unsigned stsd_id;
92 unsigned duration;
93 unsigned size;
94 unsigned flags;
95 } MOVFragment;
96
97 typedef struct {
98 unsigned track_id;
99 unsigned stsd_id;
100 unsigned duration;
101 unsigned size;
102 unsigned flags;
103 } MOVTrackExt;
104
105 typedef struct MOVStreamContext {
106 ByteIOContext *pb;
107 int ffindex; /* the ffmpeg stream id */
108 int next_chunk;
109 unsigned int chunk_count;
110 int64_t *chunk_offsets;
111 unsigned int stts_count;
112 MOV_stts_t *stts_data;
113 unsigned int ctts_count;
114 MOV_stts_t *ctts_data;
115 unsigned int edit_count; /* number of 'edit' (elst atom) */
116 unsigned int sample_to_chunk_sz;
117 MOV_stsc_t *sample_to_chunk;
118 int sample_to_ctime_index;
119 int sample_to_ctime_sample;
120 unsigned int sample_size;
121 unsigned int sample_count;
122 int *sample_sizes;
123 unsigned int keyframe_count;
124 int *keyframes;
125 int time_scale;
126 int time_rate;
127 int current_sample;
128 unsigned int bytes_per_frame;
129 unsigned int samples_per_frame;
130 int dv_audio_container;
131 int pseudo_stream_id; ///< -1 means demux all ids
132 int16_t audio_cid; ///< stsd audio compression id
133 unsigned drefs_count;
134 MOV_dref_t *drefs;
135 int dref_id;
136 } MOVStreamContext;
137
138 typedef struct MOVContext {
139 AVFormatContext *fc;
140 int time_scale;
141 int64_t duration; /* duration of the longest track */
142 int found_moov; /* when both 'moov' and 'mdat' sections has been found */
143 int found_mdat; /* we suppose we have enough data to read the file */
144 AVPaletteControl palette_control;
145 DVDemuxContext *dv_demux;
146 AVFormatContext *dv_fctx;
147 int isom; /* 1 if file is ISO Media (mp4/3gp) */
148 MOVFragment fragment; ///< current fragment in moof atom
149 MOVTrackExt *trex_data;
150 unsigned trex_count;
151 } MOVContext;
152
153
154 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
155
156 /* those functions parse an atom */
157 /* return code:
158 0: continue to parse next atom
159 <0: error occurred, exit
160 */
161 /* links atom IDs to parse functions */
162 typedef struct MOVParseTableEntry {
163 uint32_t type;
164 int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
165 } MOVParseTableEntry;
166
167 static const MOVParseTableEntry mov_default_parse_table[];
168
169 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
170 {
171 int64_t total_size = 0;
172 MOV_atom_t a;
173 int i;
174 int err = 0;
175
176 a.offset = atom.offset;
177
178 if (atom.size < 0)
179 atom.size = INT64_MAX;
180 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
181 a.size = atom.size;
182 a.type=0;
183 if(atom.size >= 8) {
184 a.size = get_be32(pb);
185 a.type = get_le32(pb);
186 }
187 total_size += 8;
188 a.offset += 8;
189 dprintf(c->fc, "type: %08x %.4s sz: %"PRIx64" %"PRIx64" %"PRIx64"\n",
190 a.type, (char*)&a.type, a.size, atom.size, total_size);
191 if (a.size == 1) { /* 64 bit extended size */
192 a.size = get_be64(pb) - 8;
193 a.offset += 8;
194 total_size += 8;
195 }
196 if (a.size == 0) {
197 a.size = atom.size - total_size;
198 if (a.size <= 8)
199 break;
200 }
201 a.size -= 8;
202 if(a.size < 0)
203 break;
204 a.size = FFMIN(a.size, atom.size - total_size);
205
206 for (i = 0; mov_default_parse_table[i].type != 0
207 && mov_default_parse_table[i].type != a.type; i++)
208 /* empty */;
209
210 if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
211 url_fskip(pb, a.size);
212 } else {
213 offset_t start_pos = url_ftell(pb);
214 int64_t left;
215 err = mov_default_parse_table[i].parse(c, pb, a);
216 if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
217 break;
218 left = a.size - url_ftell(pb) + start_pos;
219 if (left > 0) /* skip garbage at atom end */
220 url_fskip(pb, left);
221 }
222
223 a.offset += a.size;
224 total_size += a.size;
225 }
226
227 if (!err && total_size < atom.size && atom.size < 0x7ffff)
228 url_fskip(pb, atom.size - total_size);
229
230 return err;
231 }
232
233 static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
234 {
235 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
236 MOVStreamContext *sc = st->priv_data;
237 int entries, i, j;
238
239 get_be32(pb); // version + flags
240 entries = get_be32(pb);
241 if (entries >= UINT_MAX / sizeof(*sc->drefs))
242 return -1;
243 sc->drefs_count = entries;
244 sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
245
246 for (i = 0; i < sc->drefs_count; i++) {
247 MOV_dref_t *dref = &sc->drefs[i];
248 uint32_t size = get_be32(pb);
249 offset_t next = url_ftell(pb) + size - 4;
250
251 dref->type = get_le32(pb);
252 get_be32(pb); // version + flags
253 dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
254
255 if (dref->type == MKTAG('a','l','i','s') && size > 150) {
256 /* macintosh alias record */
257 uint16_t volume_len, len;
258 char volume[28];
259 int16_t type;
260
261 url_fskip(pb, 10);
262
263 volume_len = get_byte(pb);
264 volume_len = FFMIN(volume_len, 27);
265 get_buffer(pb, volume, 27);
266 volume[volume_len] = 0;
267 av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
268
269 url_fskip(pb, 112);
270
271 for (type = 0; type != -1 && url_ftell(pb) < next; ) {
272 type = get_be16(pb);
273 len = get_be16(pb);
274 av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
275 if (len&1)
276 len += 1;
277 if (type == 2) { // absolute path
278 av_free(dref->path);
279 dref->path = av_mallocz(len+1);
280 if (!dref->path)
281 return AVERROR(ENOMEM);
282 get_buffer(pb, dref->path, len);
283 if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
284 len -= volume_len;
285 memmove(dref->path, dref->path+volume_len, len);
286 dref->path[len] = 0;
287 }
288 for (j = 0; j < len; j++)
289 if (dref->path[j] == ':')
290 dref->path[j] = '/';
291 av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
292 } else
293 url_fskip(pb, len);
294 }
295 }
296 url_fseek(pb, next, SEEK_SET);
297 }
298 return 0;
299 }
300
301 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
302 {
303 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
304 uint32_t type;
305 uint32_t ctype;
306
307 get_byte(pb); /* version */
308 get_be24(pb); /* flags */
309
310 /* component type */
311 ctype = get_le32(pb);
312 type = get_le32(pb); /* component subtype */
313
314 dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
315 ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
316 dprintf(c->fc, "stype= %c%c%c%c\n",
317 *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
318 if(!ctype)
319 c->isom = 1;
320 if (type == MKTAG('v','i','d','e'))
321 st->codec->codec_type = CODEC_TYPE_VIDEO;
322 else if(type == MKTAG('s','o','u','n'))
323 st->codec->codec_type = CODEC_TYPE_AUDIO;
324 else if(type == MKTAG('m','1','a',' '))
325 st->codec->codec_id = CODEC_ID_MP2;
326 else if(type == MKTAG('s','u','b','p')) {
327 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
328 }
329 get_be32(pb); /* component manufacture */
330 get_be32(pb); /* component flags */
331 get_be32(pb); /* component flags mask */
332
333 if(atom.size <= 24)
334 return 0; /* nothing left to read */
335
336 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
337 return 0;
338 }
339
340 static int mp4_read_descr_len(ByteIOContext *pb)
341 {
342 int len = 0;
343 int count = 4;
344 while (count--) {
345 int c = get_byte(pb);
346 len = (len << 7) | (c & 0x7f);
347 if (!(c & 0x80))
348 break;
349 }
350 return len;
351 }
352
353 static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
354 {
355 int len;
356 *tag = get_byte(pb);
357 len = mp4_read_descr_len(pb);
358 dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
359 return len;
360 }
361
362 #define MP4ESDescrTag 0x03
363 #define MP4DecConfigDescrTag 0x04
364 #define MP4DecSpecificDescrTag 0x05
365
366 static const AVCodecTag mp4_audio_types[] = {
367 { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
368 { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
369 { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
370 { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
371 { CODEC_ID_NONE, 0 },
372 };
373
374 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
375 {
376 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
377 int tag, len;
378
379 get_be32(pb); /* version + flags */
380 len = mp4_read_descr(c, pb, &tag);
381 if (tag == MP4ESDescrTag) {
382 get_be16(pb); /* ID */
383 get_byte(pb); /* priority */
384 } else
385 get_be16(pb); /* ID */
386
387 len = mp4_read_descr(c, pb, &tag);
388 if (tag == MP4DecConfigDescrTag) {
389 int object_type_id = get_byte(pb);
390 get_byte(pb); /* stream type */
391 get_be24(pb); /* buffer size db */
392 get_be32(pb); /* max bitrate */
393 get_be32(pb); /* avg bitrate */
394
395 st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
396 dprintf(c->fc, "esds object type id %d\n", object_type_id);
397 len = mp4_read_descr(c, pb, &tag);
398 if (tag == MP4DecSpecificDescrTag) {
399 dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
400 if((uint64_t)len > (1<<30))
401 return -1;
402 st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
403 if (!st->codec->extradata)
404 return AVERROR(ENOMEM);
405 get_buffer(pb, st->codec->extradata, len);
406 st->codec->extradata_size = len;
407 if (st->codec->codec_id == CODEC_ID_AAC) {
408 MPEG4AudioConfig cfg;
409 ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
410 st->codec->extradata_size);
411 if (!cfg.chan_config || cfg.chan_config > 7)
412 return -1;
413 st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
414 if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
415 st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
416 else
417 st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
418 dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
419 "sample rate %d ext sample rate %d\n", st->codec->channels,
420 cfg.object_type, cfg.ext_object_type,
421 cfg.sample_rate, cfg.ext_sample_rate);
422 if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
423 cfg.object_type)))
424 st->codec->codec_id = CODEC_ID_AAC;
425 }
426 }
427 }
428 return 0;
429 }
430
431 /* this atom contains actual media data */
432 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
433 {
434 if(atom.size == 0) /* wrong one (MP4) */
435 return 0;
436 c->found_mdat=1;
437 return 0; /* now go for moov */
438 }
439
440 static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
441 {
442 uint32_t type = get_le32(pb);
443
444 if (type != MKTAG('q','t',' ',' '))
445 c->isom = 1;
446 av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
447 get_be32(pb); /* minor version */
448 url_fskip(pb, atom.size - 8);
449 return 0;
450 }
451
452 /* this atom should contain all header atoms */
453 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
454 {
455 if (mov_read_default(c, pb, atom) < 0)
456 return -1;
457 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
458 /* so we don't parse the whole file if over a network */
459 c->found_moov=1;
460 return 0; /* now go for mdat */
461 }
462
463 static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
464 {
465 c->fragment.moof_offset = url_ftell(pb) - 8;
466 dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
467 return mov_read_default(c, pb, atom);
468 }
469
470 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
471 {
472 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
473 MOVStreamContext *sc = st->priv_data;
474 int version = get_byte(pb);
475 int lang;
476
477 if (version > 1)
478 return -1; /* unsupported */
479
480 get_be24(pb); /* flags */
481 if (version == 1) {
482 get_be64(pb);
483 get_be64(pb);
484 } else {
485 get_be32(pb); /* creation time */
486 get_be32(pb); /* modification time */
487 }
488
489 sc->time_scale = get_be32(pb);
490 st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
491
492 lang = get_be16(pb); /* language */
493 ff_mov_lang_to_iso639(lang, st->language);
494 get_be16(pb); /* quality */
495
496 return 0;
497 }
498
499 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
500 {
501 int version = get_byte(pb); /* version */
502 get_be24(pb); /* flags */
503
504 if (version == 1) {
505 get_be64(pb);
506 get_be64(pb);
507 } else {
508 get_be32(pb); /* creation time */
509 get_be32(pb); /* modification time */
510 }
511 c->time_scale = get_be32(pb); /* time scale */
512
513 dprintf(c->fc, "time scale = %i\n", c->time_scale);
514
515 c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
516 get_be32(pb); /* preferred scale */
517
518 get_be16(pb); /* preferred volume */
519
520 url_fskip(pb, 10); /* reserved */
521
522 url_fskip(pb, 36); /* display matrix */
523
524 get_be32(pb); /* preview time */
525 get_be32(pb); /* preview duration */
526 get_be32(pb); /* poster time */
527 get_be32(pb); /* selection time */
528 get_be32(pb); /* selection duration */
529 get_be32(pb); /* current time */
530 get_be32(pb); /* next track ID */
531
532 return 0;
533 }
534
535 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
536 {
537 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
538
539 if((uint64_t)atom.size > (1<<30))
540 return -1;
541
542 // currently SVQ3 decoder expect full STSD header - so let's fake it
543 // this should be fixed and just SMI header should be passed
544 av_free(st->codec->extradata);
545 st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
546 if (!st->codec->extradata)
547 return AVERROR(ENOMEM);
548 st->codec->extradata_size = 0x5a + atom.size;
549 memcpy(st->codec->extradata, "SVQ3", 4); // fake
550 get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
551 dprintf(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a);
552 return 0;
553 }
554
555 static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
556 {
557 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
558 int little_endian = get_be16(pb);
559
560 if (little_endian) {
561 switch (st->codec->codec_id) {
562 case CODEC_ID_PCM_S24BE:
563 st->codec->codec_id = CODEC_ID_PCM_S24LE;
564 break;
565 case CODEC_ID_PCM_S32BE:
566 st->codec->codec_id = CODEC_ID_PCM_S32LE;
567 break;
568 default:
569 break;
570 }
571 }
572 return 0;
573 }
574
575 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
576 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
577 {
578 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
579 uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
580 uint8_t *buf;
581 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
582 return -1;
583 buf= av_realloc(st->codec->extradata, size);
584 if(!buf)
585 return -1;
586 st->codec->extradata= buf;
587 buf+= st->codec->extradata_size;
588 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
589 AV_WB32( buf , atom.size + 8);
590 AV_WL32( buf + 4, atom.type);
591 get_buffer(pb, buf + 8, atom.size);
592 return 0;
593 }
594
595 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
596 {
597 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
598
599 if((uint64_t)atom.size > (1<<30))
600 return -1;
601
602 if (st->codec->codec_id == CODEC_ID_QDM2) {
603 // pass all frma atom to codec, needed at least for QDM2
604 av_free(st->codec->extradata);
605 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
606 if (!st->codec->extradata)
607 return AVERROR(ENOMEM);
608 st->codec->extradata_size = atom.size;
609 get_buffer(pb, st->codec->extradata, atom.size);
610 } else if (atom.size > 8) { /* to read frma, esds atoms */
611 if (mov_read_default(c, pb, atom) < 0)
612 return -1;
613 } else
614 url_fskip(pb, atom.size);
615 return 0;
616 }
617
618 /**
619 * This function reads atom content and puts data in extradata without tag
620 * nor size unlike mov_read_extradata.
621 */
622 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
623 {
624 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
625
626 if((uint64_t)atom.size > (1<<30))
627 return -1;
628
629 av_free(st->codec->extradata);
630 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
631 if (!st->codec->extradata)
632 return AVERROR(ENOMEM);
633 st->codec->extradata_size = atom.size;
634 get_buffer(pb, st->codec->extradata, atom.size);
635 return 0;
636 }
637
638 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
639 {
640 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
641 MOVStreamContext *sc = st->priv_data;
642 unsigned int i, entries;
643
644 get_byte(pb); /* version */
645 get_be24(pb); /* flags */
646
647 entries = get_be32(pb);
648
649 if(entries >= UINT_MAX/sizeof(int64_t))
650 return -1;
651
652 sc->chunk_count = entries;
653 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
654 if (!sc->chunk_offsets)
655 return -1;
656 if (atom.type == MKTAG('s','t','c','o'))
657 for(i=0; i<entries; i++)
658 sc->chunk_offsets[i] = get_be32(pb);
659 else if (atom.type == MKTAG('c','o','6','4'))
660 for(i=0; i<entries; i++)
661 sc->chunk_offsets[i] = get_be64(pb);
662 else
663 return -1;
664
665 return 0;
666 }
667
668 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
669 {
670 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
671 MOVStreamContext *sc = st->priv_data;
672 int j, entries, pseudo_stream_id;
673
674 get_byte(pb); /* version */
675 get_be24(pb); /* flags */
676
677 entries = get_be32(pb);
678
679 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
680 //Parsing Sample description table
681 enum CodecID id;
682 int dref_id;
683 MOV_atom_t a = { 0, 0, 0 };
684 offset_t start_pos = url_ftell(pb);
685 int size = get_be32(pb); /* size */
686 uint32_t format = get_le32(pb); /* data format */
687
688 get_be32(pb); /* reserved */
689 get_be16(pb); /* reserved */
690 dref_id = get_be16(pb);
691
692 if (st->codec->codec_tag &&
693 st->codec->codec_tag != format &&
694 (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
695 : st->codec->codec_tag != MKTAG('j','p','e','g'))
696 ){
697 /* Multiple fourcc, we skip JPEG. This is not correct, we should
698 * export it as a separate AVStream but this needs a few changes
699 * in the MOV demuxer, patch welcome. */
700 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
701 url_fskip(pb, size - (url_ftell(pb) - start_pos));
702 continue;
703 }
704 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
705 sc->dref_id= dref_id;
706
707 st->codec->codec_tag = format;
708 id = codec_get_id(codec_movaudio_tags, format);
709 if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
710 id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
711
712 if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
713 st->codec->codec_type = CODEC_TYPE_AUDIO;
714 } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
715 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
716 id = codec_get_id(codec_movvideo_tags, format);
717 if (id <= 0)
718 id = codec_get_id(codec_bmp_tags, format);
719 if (id > 0)
720 st->codec->codec_type = CODEC_TYPE_VIDEO;
721 else if(st->codec->codec_type == CODEC_TYPE_DATA){
722 id = codec_get_id(ff_codec_movsubtitle_tags, format);
723 if(id > 0)
724 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
725 }
726 }
727
728 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
729 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
730 (format >> 24) & 0xff, st->codec->codec_type);
731
732 if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
733 uint8_t codec_name[32];
734 unsigned int color_depth;
735 int color_greyscale;
736
737 st->codec->codec_id = id;
738 get_be16(pb); /* version */
739 get_be16(pb); /* revision level */
740 get_be32(pb); /* vendor */
741 get_be32(pb); /* temporal quality */
742 get_be32(pb); /* spatial quality */
743
744 st->codec->width = get_be16(pb); /* width */
745 st->codec->height = get_be16(pb); /* height */
746
747 get_be32(pb); /* horiz resolution */
748 get_be32(pb); /* vert resolution */
749 get_be32(pb); /* data size, always 0 */
750 get_be16(pb); /* frames per samples */
751
752 get_buffer(pb, codec_name, 32); /* codec name, pascal string */
753 if (codec_name[0] <= 31) {
754 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
755 st->codec->codec_name[codec_name[0]] = 0;
756 }
757
758 st->codec->bits_per_sample = get_be16(pb); /* depth */
759 st->codec->color_table_id = get_be16(pb); /* colortable id */
760 dprintf(c->fc, "depth %d, ctab id %d\n",
761 st->codec->bits_per_sample, st->codec->color_table_id);
762 /* figure out the palette situation */
763 color_depth = st->codec->bits_per_sample & 0x1F;
764 color_greyscale = st->codec->bits_per_sample & 0x20;
765
766 /* if the depth is 2, 4, or 8 bpp, file is palettized */
767 if ((color_depth == 2) || (color_depth == 4) ||
768 (color_depth == 8)) {
769 /* for palette traversal */
770 unsigned int color_start, color_count, color_end;
771 unsigned char r, g, b;
772
773 if (color_greyscale) {
774 int color_index, color_dec;
775 /* compute the greyscale palette */
776 st->codec->bits_per_sample = color_depth;
777 color_count = 1 << color_depth;
778 color_index = 255;
779 color_dec = 256 / (color_count - 1);
780 for (j = 0; j < color_count; j++) {
781 r = g = b = color_index;
782 c->palette_control.palette[j] =
783 (r << 16) | (g << 8) | (b);
784 color_index -= color_dec;
785 if (color_index < 0)
786 color_index = 0;
787 }
788 } else if (st->codec->color_table_id) {
789 const uint8_t *color_table;
790 /* if flag bit 3 is set, use the default palette */
791 color_count = 1 << color_depth;
792 if (color_depth == 2)
793 color_table = ff_qt_default_palette_4;
794 else if (color_depth == 4)
795 color_table = ff_qt_default_palette_16;
796 else
797 color_table = ff_qt_default_palette_256;
798
799 for (j = 0; j < color_count; j++) {
800 r = color_table[j * 4 + 0];
801 g = color_table[j * 4 + 1];
802 b = color_table[j * 4 + 2];
803 c->palette_control.palette[j] =
804 (r << 16) | (g << 8) | (b);
805 }
806 } else {
807 /* load the palette from the file */
808 color_start = get_be32(pb);
809 color_count = get_be16(pb);
810 color_end = get_be16(pb);
811 if ((color_start <= 255) &&
812 (color_end <= 255)) {
813 for (j = color_start; j <= color_end; j++) {
814 /* each R, G, or B component is 16 bits;
815 * only use the top 8 bits; skip alpha bytes
816 * up front */
817 get_byte(pb);
818 get_byte(pb);
819 r = get_byte(pb);
820 get_byte(pb);
821 g = get_byte(pb);
822 get_byte(pb);
823 b = get_byte(pb);
824 get_byte(pb);
825 c->palette_control.palette[j] =
826 (r << 16) | (g << 8) | (b);
827 }
828 }
829 }
830 st->codec->palctrl = &c->palette_control;
831 st->codec->palctrl->palette_changed = 1;
832 } else
833 st->codec->palctrl = NULL;
834 } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
835 int bits_per_sample;
836 uint16_t version = get_be16(pb);
837
838 st->codec->codec_id = id;
839 get_be16(pb); /* revision level */
840 get_be32(pb); /* vendor */
841
842 st->codec->channels = get_be16(pb); /* channel count */
843 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
844 st->codec->bits_per_sample = get_be16(pb); /* sample size */
845
846 sc->audio_cid = get_be16(pb);
847 get_be16(pb); /* packet size = 0 */
848
849 st->codec->sample_rate = ((get_be32(pb) >> 16));
850
851 switch (st->codec->codec_id) {
852 case CODEC_ID_PCM_S8:
853 case CODEC_ID_PCM_U8:
854 if (st->codec->bits_per_sample == 16)
855 st->codec->codec_id = CODEC_ID_PCM_S16BE;
856 break;
857 case CODEC_ID_PCM_S16LE:
858 case CODEC_ID_PCM_S16BE:
859 if (st->codec->bits_per_sample == 8)
860 st->codec->codec_id = CODEC_ID_PCM_S8;
861 else if (st->codec->bits_per_sample == 24)
862 st->codec->codec_id = CODEC_ID_PCM_S24BE;
863 break;
864 /* set values for old format before stsd version 1 appeared */
865 case CODEC_ID_MACE3:
866 sc->samples_per_frame = 6;
867 sc->bytes_per_frame = 2*st->codec->channels;
868 break;
869 case CODEC_ID_MACE6:
870 sc->samples_per_frame = 6;
871 sc->bytes_per_frame = 1*st->codec->channels;
872 break;
873 case CODEC_ID_ADPCM_IMA_QT:
874 sc->samples_per_frame = 64;
875 sc->bytes_per_frame = 34*st->codec->channels;
876 break;
877 case CODEC_ID_GSM:
878 sc->samples_per_frame = 160;
879 sc->bytes_per_frame = 33;
880 break;
881 default:
882 break;
883 }
884
885 //Read QT version 1 fields. In version 0 these do not exist.
886 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
887 if(!c->isom) {
888 if(version==1) {
889 sc->samples_per_frame = get_be32(pb);
890 get_be32(pb); /* bytes per packet */
891 sc->bytes_per_frame = get_be32(pb);
892 get_be32(pb); /* bytes per sample */
893 } else if(version==2) {
894 get_be32(pb); /* sizeof struct only */
895 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
896 st->codec->channels = get_be32(pb);
897 get_be32(pb); /* always 0x7F000000 */
898 get_be32(pb); /* bits per channel if sound is uncompressed */
899 get_be32(pb); /* lcpm format specific flag */
900 get_be32(pb); /* bytes per audio packet if constant */
901 get_be32(pb); /* lpcm frames per audio packet if constant */
902 }
903 }
904
905 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
906 if (bits_per_sample) {
907 st->codec->bits_per_sample = bits_per_sample;
908 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
909 }
910 } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
911 st->codec->codec_id= id;
912 } else {
913 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
914 url_fskip(pb, size - (url_ftell(pb) - start_pos));
915 }
916 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
917 a.size = size - (url_ftell(pb) - start_pos);
918 if (a.size > 8) {
919 if (mov_read_default(c, pb, a) < 0)
920 return -1;
921 } else if (a.size > 0)
922 url_fskip(pb, a.size);
923 }
924
925 if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
926 st->codec->sample_rate= sc->time_scale;
927
928 /* special codec parameters handling */
929 switch (st->codec->codec_id) {
930 #ifdef CONFIG_DV_DEMUXER
931 case CODEC_ID_DVAUDIO:
932 c->dv_fctx = av_alloc_format_context();
933 c->dv_demux = dv_init_demux(c->dv_fctx);
934 if (!c->dv_demux) {
935 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
936 return -1;
937 }
938 sc->dv_audio_container = 1;
939 st->codec->codec_id = CODEC_ID_PCM_S16LE;
940 break;
941 #endif
942 /* no ifdef since parameters are always those */
943 case CODEC_ID_AMR_WB:
944 st->codec->sample_rate= 16000;
945 st->codec->channels= 1; /* really needed */
946 break;
947 case CODEC_ID_QCELP:
948 case CODEC_ID_AMR_NB:
949 st->codec->frame_size= sc->samples_per_frame;
950 st->codec->sample_rate= 8000;
951 st->codec->channels= 1; /* really needed */
952 break;
953 case CODEC_ID_MP2:
954 case CODEC_ID_MP3:
955 st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
956 st->need_parsing = AVSTREAM_PARSE_FULL;
957 break;
958 case CODEC_ID_GSM:
959 case CODEC_ID_ADPCM_MS:
960 case CODEC_ID_ADPCM_IMA_WAV:
961 st->codec->block_align = sc->bytes_per_frame;
962 break;
963 case CODEC_ID_ALAC:
964 if (st->codec->extradata_size == 36)
965 st->codec->frame_size = AV_RB32((st->codec->extradata+12));
966 break;
967 default:
968 break;
969 }
970
971 return 0;
972 }
973
974 static int mov_read_stsc(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(MOV_stsc_t))
986 return -1;
987
988 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
989
990 sc->sample_to_chunk_sz = entries;
991 sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
992 if (!sc->sample_to_chunk)
993 return -1;
994 for(i=0; i<entries; i++) {
995 sc->sample_to_chunk[i].first = get_be32(pb);
996 sc->sample_to_chunk[i].count = get_be32(pb);
997 sc->sample_to_chunk[i].id = get_be32(pb);
998 }
999 return 0;
1000 }
1001
1002 static int mov_read_stss(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;
1007
1008 get_byte(pb); /* version */
1009 get_be24(pb); /* flags */
1010
1011 entries = get_be32(pb);
1012
1013 if(entries >= UINT_MAX / sizeof(int))
1014 return -1;
1015
1016 sc->keyframe_count = entries;
1017
1018 dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1019
1020 sc->keyframes = av_malloc(entries * sizeof(int));
1021 if (!sc->keyframes)
1022 return -1;
1023 for(i=0; i<entries; i++) {
1024 sc->keyframes[i] = get_be32(pb);
1025 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1026 }
1027 return 0;
1028 }
1029
1030 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1031 {
1032 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1033 MOVStreamContext *sc = st->priv_data;
1034 unsigned int i, entries, sample_size;
1035
1036 get_byte(pb); /* version */
1037 get_be24(pb); /* flags */
1038
1039 sample_size = get_be32(pb);
1040 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1041 sc->sample_size = sample_size;
1042 entries = get_be32(pb);
1043 if(entries >= UINT_MAX / sizeof(int))
1044 return -1;
1045
1046 sc->sample_count = entries;
1047 if (sample_size)
1048 return 0;
1049
1050 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1051
1052 sc->sample_sizes = av_malloc(entries * sizeof(int));
1053 if (!sc->sample_sizes)
1054 return -1;
1055 for(i=0; i<entries; i++)
1056 sc->sample_sizes[i] = get_be32(pb);
1057 return 0;
1058 }
1059
1060 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1061 {
1062 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1063 MOVStreamContext *sc = st->priv_data;
1064 unsigned int i, entries;
1065 int64_t duration=0;
1066 int64_t total_sample_count=0;
1067
1068 get_byte(pb); /* version */
1069 get_be24(pb); /* flags */
1070 entries = get_be32(pb);
1071 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1072 return -1;
1073
1074 sc->stts_count = entries;
1075 sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1076 if (!sc->stts_data)
1077 return -1;
1078 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1079
1080 sc->time_rate=0;
1081
1082 for(i=0; i<entries; i++) {
1083 int sample_duration;
1084 int sample_count;
1085
1086 sample_count=get_be32(pb);
1087 sample_duration = get_be32(pb);
1088 sc->stts_data[i].count= sample_count;
1089 sc->stts_data[i].duration= sample_duration;
1090
1091 sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1092
1093 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1094
1095 duration+=(int64_t)sample_duration*sample_count;
1096 total_sample_count+=sample_count;
1097 }
1098
1099 st->nb_frames= total_sample_count;
1100 if(duration)
1101 st->duration= duration;
1102 return 0;
1103 }
1104
1105 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1106 {
1107 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1108 MOVStreamContext *sc = st->priv_data;
1109 unsigned int i, entries;
1110
1111 get_byte(pb); /* version */
1112 get_be24(pb); /* flags */
1113 entries = get_be32(pb);
1114 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1115 return -1;
1116
1117 sc->ctts_count = entries;
1118 sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1119 if (!sc->ctts_data)
1120 return -1;
1121 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1122
1123 for(i=0; i<entries; i++) {
1124 int count =get_be32(pb);
1125 int duration =get_be32(pb);
1126
1127 if (duration < 0) {
1128 av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1129 sc->ctts_count = 0;
1130 url_fskip(pb, 8 * (entries - i - 1));
1131 break;
1132 }
1133 sc->ctts_data[i].count = count;
1134 sc->ctts_data[i].duration= duration;
1135
1136 sc->time_rate= ff_gcd(sc->time_rate, duration);
1137 }
1138 return 0;
1139 }
1140
1141 static void mov_build_index(MOVContext *mov, AVStream *st)
1142 {
1143 MOVStreamContext *sc = st->priv_data;
1144 offset_t current_offset;
1145 int64_t current_dts = 0;
1146 unsigned int stts_index = 0;
1147 unsigned int stsc_index = 0;
1148 unsigned int stss_index = 0;
1149 unsigned int i, j;
1150
1151 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1152 if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1153 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1154 unsigned int current_sample = 0;
1155 unsigned int stts_sample = 0;
1156 unsigned int keyframe, sample_size;
1157 unsigned int distance = 0;
1158 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1159
1160 st->nb_frames = sc->sample_count;
1161 for (i = 0; i < sc->chunk_count; i++) {
1162 current_offset = sc->chunk_offsets[i];
1163 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1164 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1165 stsc_index++;
1166 for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1167 if (current_sample >= sc->sample_count) {
1168 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1169 goto out;
1170 }
1171 keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1172 if (keyframe) {
1173 distance = 0;
1174 if (stss_index + 1 < sc->keyframe_count)
1175 stss_index++;
1176 }
1177 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1178 if(sc->pseudo_stream_id == -1 ||
1179 sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1180 av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1181 keyframe ? AVINDEX_KEYFRAME : 0);
1182 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1183 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1184 current_offset, current_dts, sample_size, distance, keyframe);
1185 }
1186 current_offset += sample_size;
1187 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1188 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1189 distance++;
1190 stts_sample++;
1191 current_sample++;
1192 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1193 stts_sample = 0;
1194 stts_index++;
1195 }
1196 }
1197 }
1198 } else { /* read whole chunk */
1199 unsigned int chunk_samples, chunk_size, chunk_duration;
1200 unsigned int frames = 1;
1201 for (i = 0; i < sc->chunk_count; i++) {
1202 current_offset = sc->chunk_offsets[i];
1203 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1204 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1205 stsc_index++;
1206 chunk_samples = sc->sample_to_chunk[stsc_index].count;
1207 /* get chunk size, beware of alaw/ulaw/mace */
1208 if (sc->samples_per_frame > 0 &&
1209 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1210 if (sc->samples_per_frame < 160)
1211 chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1212 else {
1213 chunk_size = sc->bytes_per_frame;
1214 frames = chunk_samples / sc->samples_per_frame;
1215 chunk_samples = sc->samples_per_frame;
1216 }
1217 } else
1218 chunk_size = chunk_samples * sc->sample_size;
1219 for (j = 0; j < frames; j++) {
1220 av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1221 /* get chunk duration */
1222 chunk_duration = 0;
1223 while (chunk_samples > 0) {
1224 if (chunk_samples < sc->stts_data[stts_index].count) {
1225 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1226 sc->stts_data[stts_index].count -= chunk_samples;
1227 break;
1228 } else {
1229 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1230 chunk_samples -= sc->stts_data[stts_index].count;
1231 if (stts_index + 1 < sc->stts_count)
1232 stts_index++;
1233 }
1234 }
1235 current_offset += sc->bytes_per_frame;
1236 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1237 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1238 chunk_size, chunk_duration);
1239 assert(chunk_duration % sc->time_rate == 0);
1240 current_dts += chunk_duration / sc->time_rate;
1241 }
1242 }
1243 }
1244 out:
1245 /* adjust sample count to avindex entries */
1246 sc->sample_count = st->nb_index_entries;
1247 }
1248
1249 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1250 {
1251 AVStream *st;
1252 MOVStreamContext *sc;
1253 int ret;
1254
1255 st = av_new_stream(c->fc, c->fc->nb_streams);
1256 if (!st) return AVERROR(ENOMEM);
1257 sc = av_mallocz(sizeof(MOVStreamContext));
1258 if (!sc) return AVERROR(ENOMEM);
1259
1260 st->priv_data = sc;
1261 st->codec->codec_type = CODEC_TYPE_DATA;
1262 st->start_time = 0; /* XXX: check */
1263
1264 if ((ret = mov_read_default(c, pb, atom)) < 0)
1265 return ret;
1266
1267 /* sanity checks */
1268 if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1269 (!sc->sample_size && !sc->sample_count))){
1270 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1271 st->index);
1272 sc->sample_count = 0; //ignore track
1273 return 0;
1274 }
1275 if(!sc->time_rate)
1276 sc->time_rate=1;
1277 if(!sc->time_scale)
1278 sc->time_scale= c->time_scale;
1279 av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1280
1281 if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1282 !st->codec->frame_size && sc->stts_count == 1)
1283 st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1284
1285 if(st->duration != AV_NOPTS_VALUE){
1286 assert(st->duration % sc->time_rate == 0);
1287 st->duration /= sc->time_rate;
1288 }
1289 sc->ffindex = st->index;
1290 mov_build_index(c, st);
1291
1292 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1293 if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1294 av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1295 st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1296 } else
1297 sc->pb = c->fc->pb;
1298
1299 switch (st->codec->codec_id) {
1300 #ifdef CONFIG_H261_DECODER
1301 case CODEC_ID_H261:
1302 #endif
1303 #ifdef CONFIG_H263_DECODER
1304 case CODEC_ID_H263:
1305 #endif
1306 #ifdef CONFIG_MPEG4_DECODER
1307 case CODEC_ID_MPEG4:
1308 #endif
1309 st->codec->width= 0; /* let decoder init width/height */
1310 st->codec->height= 0;
1311 break;
1312 #ifdef CONFIG_VORBIS_DECODER
1313 case CODEC_ID_VORBIS:
1314 #endif
1315 st->codec->sample_rate= 0; /* let decoder init parameters properly */
1316 break;
1317 }
1318
1319 /* Do not need those anymore. */
1320 av_freep(&sc->chunk_offsets);
1321 av_freep(&sc->sample_to_chunk);
1322 av_freep(&sc->sample_sizes);
1323 av_freep(&sc->keyframes);
1324 av_freep(&sc->stts_data);
1325
1326 return 0;
1327 }
1328
1329 static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1330 {
1331 uint16_t str_size = get_be16(pb); /* string length */;
1332
1333 get_be16(pb); /* skip language */
1334 get_buffer(pb, str, FFMIN(size, str_size));
1335 }
1336
1337 static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1338 {
1339 uint64_t end = url_ftell(pb) + atom.size;
1340
1341 while (url_ftell(pb) + 8 < end) {
1342 uint32_t tag_size = get_be32(pb);
1343 uint32_t tag = get_le32(pb);
1344 uint64_t next = url_ftell(pb) + tag_size - 8;
1345
1346 if (next > end) // stop if tag_size is wrong
1347 break;
1348
1349 switch (tag) {
1350 case MKTAG(0xa9,'n','a','m'):
1351 mov_parse_udta_string(pb, c->fc->title, sizeof(c->fc->title));
1352 break;
1353 case MKTAG(0xa9,'w','r','t'):
1354 mov_parse_udta_string(pb, c->fc->author, sizeof(c->fc->author));
1355 break;
1356 case MKTAG(0xa9,'c','p','y'):
1357 mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1358 break;
1359 case MKTAG(0xa9,'i','n','f'):
1360 mov_parse_udta_string(pb, c->fc->comment, sizeof(c->fc->comment));
1361 break;
1362 default:
1363 break;
1364 }
1365
1366 url_fseek(pb, next, SEEK_SET);
1367 }
1368
1369 return 0;
1370 }
1371
1372 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1373 {
1374 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1375 int version = get_byte(pb);
1376
1377 get_be24(pb); /* flags */
1378 /*
1379 MOV_TRACK_ENABLED 0x0001
1380 MOV_TRACK_IN_MOVIE 0x0002
1381 MOV_TRACK_IN_PREVIEW 0x0004
1382 MOV_TRACK_IN_POSTER 0x0008
1383 */
1384
1385 if (version == 1) {
1386 get_be64(pb);
1387 get_be64(pb);
1388 } else {
1389 get_be32(pb); /* creation time */
1390 get_be32(pb); /* modification time */
1391 }
1392 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1393 get_be32(pb); /* reserved */
1394 st->start_time = 0; /* check */
1395 /* highlevel (considering edits) duration in movie timebase */
1396 (version == 1) ? get_be64(pb) : get_be32(pb);
1397 get_be32(pb); /* reserved */
1398 get_be32(pb); /* reserved */
1399
1400 get_be16(pb); /* layer */
1401 get_be16(pb); /* alternate group */
1402 get_be16(pb); /* volume */
1403 get_be16(pb); /* reserved */
1404
1405 url_fskip(pb, 36); /* display matrix */
1406
1407 /* those are fixed-point */
1408 get_be32(pb); /* track width */
1409 get_be32(pb); /* track height */
1410
1411 return 0;
1412 }
1413
1414 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1415 {
1416 MOVFragment *frag = &c->fragment;
1417 MOVTrackExt *trex = NULL;
1418 int flags, track_id, i;
1419
1420 get_byte(pb); /* version */
1421 flags = get_be24(pb);
1422
1423 track_id = get_be32(pb);
1424 if (!track_id || track_id > c->fc->nb_streams)
1425 return -1;
1426 frag->track_id = track_id;
1427 for (i = 0; i < c->trex_count; i++)
1428 if (c->trex_data[i].track_id == frag->track_id) {
1429 trex = &c->trex_data[i];
1430 break;
1431 }
1432 if (!trex) {
1433 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1434 return -1;
1435 }
1436
1437 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1438 else frag->base_data_offset = frag->moof_offset;
1439 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1440 else frag->stsd_id = trex->stsd_id;
1441
1442 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1443 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1444 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1445 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1446 return 0;
1447 }
1448
1449 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1450 {
1451 MOVTrackExt *trex;
1452
1453 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1454 return -1;
1455 c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1456 if (!c->trex_data)
1457 return AVERROR(ENOMEM);
1458 trex = &c->trex_data[c->trex_count++];
1459 get_byte(pb); /* version */
1460 get_be24(pb); /* flags */
1461 trex->track_id = get_be32(pb);
1462 trex->stsd_id = get_be32(pb);
1463 trex->duration = get_be32(pb);
1464 trex->size = get_be32(pb);
1465 trex->flags = get_be32(pb);
1466 return 0;
1467 }
1468
1469 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1470 {
1471 MOVFragment *frag = &c->fragment;
1472 AVStream *st;
1473 MOVStreamContext *sc;
1474 uint64_t offset;
1475 int64_t dts;
1476 int data_offset = 0;
1477 unsigned entries, first_sample_flags = frag->flags;
1478 int flags, distance, i;
1479
1480 if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1481 return -1;
1482 st = c->fc->streams[frag->track_id-1];
1483 sc = st->priv_data;
1484 if (sc->pseudo_stream_id+1 != frag->stsd_id)
1485 return 0;
1486 get_byte(pb); /* version */
1487 flags = get_be24(pb);
1488 entries = get_be32(pb);
1489 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1490 if (flags & 0x001) data_offset = get_be32(pb);
1491 if (flags & 0x004) first_sample_flags = get_be32(pb);
1492 if (flags & 0x800) {
1493 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1494 return -1;
1495 sc->ctts_data = av_realloc(sc->ctts_data,
1496 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1497 if (!sc->ctts_data)
1498 return AVERROR(ENOMEM);
1499 }
1500 dts = st->duration;
1501 offset = frag->base_data_offset + data_offset;
1502 distance = 0;
1503 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1504 for (i = 0; i < entries; i++) {
1505 unsigned sample_size = frag->size;
1506 int sample_flags = i ? frag->flags : first_sample_flags;
1507 unsigned sample_duration = frag->duration;
1508 int keyframe;
1509
1510 if (flags & 0x100) sample_duration = get_be32(pb);
1511 if (flags & 0x200) sample_size = get_be32(pb);
1512 if (flags & 0x400) sample_flags = get_be32(pb);
1513 if (flags & 0x800) {
1514 sc->ctts_data[sc->ctts_count].count = 1;
1515 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1516 sc->ctts_count++;
1517 }
1518 if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1519 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1520 distance = 0;
1521 av_add_index_entry(st, offset, dts, sample_size, distance,
1522 keyframe ? AVINDEX_KEYFRAME : 0);
1523 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1524 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1525 offset, dts, sample_size, distance, keyframe);
1526 distance++;
1527 assert(sample_duration % sc->time_rate == 0);
1528 dts += sample_duration / sc->time_rate;
1529 offset += sample_size;
1530 }
1531 frag->moof_offset = offset;
1532 sc->sample_count = st->nb_index_entries;
1533 st->duration = dts;
1534 return 0;
1535 }
1536
1537 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1538 /* like the files created with Adobe Premiere 5.0, for samples see */
1539 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1540 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1541 {
1542 int err;
1543
1544 if (atom.size < 8)
1545 return 0; /* continue */
1546 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1547 url_fskip(pb, atom.size - 4);
1548 return 0;
1549 }
1550 atom.type = get_le32(pb);
1551 atom.offset += 8;
1552 atom.size -= 8;
1553 if (atom.type != MKTAG('m','d','a','t')) {
1554 url_fskip(pb, atom.size);
1555 return 0;
1556 }
1557 err = mov_read_mdat(c, pb, atom);
1558 return err;
1559 }
1560
1561 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1562 {
1563 #ifdef CONFIG_ZLIB
1564 ByteIOContext ctx;
1565 uint8_t *cmov_data;
1566 uint8_t *moov_data; /* uncompressed data */
1567 long cmov_len, moov_len;
1568 int ret = -1;
1569
1570 get_be32(pb); /* dcom atom */
1571 if (get_le32(pb) != MKTAG('d','c','o','m'))
1572 return -1;
1573 if (get_le32(pb) != MKTAG('z','l','i','b')) {
1574 av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1575 return -1;
1576 }
1577 get_be32(pb); /* cmvd atom */
1578 if (get_le32(pb) != MKTAG('c','m','v','d'))
1579 return -1;
1580 moov_len = get_be32(pb); /* uncompressed size */
1581 cmov_len = atom.size - 6 * 4;
1582
1583 cmov_data = av_malloc(cmov_len);
1584 if (!cmov_data)
1585 return -1;
1586 moov_data = av_malloc(moov_len);
1587 if (!moov_data) {
1588 av_free(cmov_data);
1589 return -1;
1590 }
1591 get_buffer(pb, cmov_data, cmov_len);
1592 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1593 goto free_and_return;
1594 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1595 goto free_and_return;
1596 atom.type = MKTAG('m','o','o','v');
1597 atom.offset = 0;
1598 atom.size = moov_len;
1599 #ifdef DEBUG
1600 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1601 #endif
1602 ret = mov_read_default(c, &ctx, atom);
1603 free_and_return:
1604 av_free(moov_data);
1605 av_free(cmov_data);
1606 return ret;
1607 #else
1608 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1609 return -1;
1610 #endif
1611 }
1612
1613 /* edit list atom */
1614 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1615 {
1616 MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1617 int i, edit_count;
1618
1619 get_byte(pb); /* version */
1620 get_be24(pb); /* flags */
1621 edit_count= sc->edit_count = get_be32(pb); /* entries */
1622
1623 for(i=0; i<edit_count; i++){
1624 int time;
1625 get_be32(pb); /* Track duration */
1626 time = get_be32(pb); /* Media time */
1627 get_be32(pb); /* Media rate */
1628 if (time != 0)
1629 av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1630 "a/v desync might occur, patch welcome\n");
1631 }
1632 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1633 return 0;
1634 }
1635
1636 static const MOVParseTableEntry mov_default_parse_table[] = {
1637 { MKTAG('c','o','6','4'), mov_read_stco },
1638 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1639 { MKTAG('d','i','n','f'), mov_read_default },
1640 { MKTAG('d','r','e','f'), mov_read_dref },
1641 { MKTAG('e','d','t','s'), mov_read_default },
1642 { MKTAG('e','l','s','t'), mov_read_elst },
1643 { MKTAG('e','n','d','a'), mov_read_enda },
1644 { MKTAG('f','i','e','l'), mov_read_extradata },
1645 { MKTAG('f','t','y','p'), mov_read_ftyp },
1646 { MKTAG('g','l','b','l'), mov_read_glbl },
1647 { MKTAG('h','d','l','r'), mov_read_hdlr },
1648 { MKTAG('j','p','2','h'), mov_read_extradata },
1649 { MKTAG('m','d','a','t'), mov_read_mdat },
1650 { MKTAG('m','d','h','d'), mov_read_mdhd },
1651 { MKTAG('m','d','i','a'), mov_read_default },
1652 { MKTAG('m','i','n','f'), mov_read_default },
1653 { MKTAG('m','o','o','f'), mov_read_moof },
1654 { MKTAG('m','o','o','v'), mov_read_moov },
1655 { MKTAG('m','v','e','x'), mov_read_default },
1656 { MKTAG('m','v','h','d'), mov_read_mvhd },
1657 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1658 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1659 { MKTAG('a','v','c','C'), mov_read_glbl },
1660 { MKTAG('s','t','b','l'), mov_read_default },
1661 { MKTAG('s','t','c','o'), mov_read_stco },
1662 { MKTAG('s','t','s','c'), mov_read_stsc },
1663 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1664 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1665 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1666 { MKTAG('s','t','t','s'), mov_read_stts },
1667 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1668 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1669 { MKTAG('t','r','a','k'), mov_read_trak },
1670 { MKTAG('t','r','a','f'), mov_read_default },
1671 { MKTAG('t','r','e','x'), mov_read_trex },
1672 { MKTAG('t','r','u','n'), mov_read_trun },
1673 { MKTAG('u','d','t','a'), mov_read_udta },
1674 { MKTAG('w','a','v','e'), mov_read_wave },
1675 { MKTAG('e','s','d','s'), mov_read_esds },
1676 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1677 { MKTAG('c','m','o','v'), mov_read_cmov },
1678 { 0, NULL }
1679 };
1680
1681 static int mov_probe(AVProbeData *p)
1682 {
1683 unsigned int offset;
1684 uint32_t tag;
1685 int score = 0;
1686
1687 /* check file header */
1688 offset = 0;
1689 for(;;) {
1690 /* ignore invalid offset */
1691 if ((offset + 8) > (unsigned int)p->buf_size)
1692 return score;
1693 tag = AV_RL32(p->buf + offset + 4);
1694 switch(tag) {
1695 /* check for obvious tags */
1696 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1697 case MKTAG('m','o','o','v'):
1698 case MKTAG('m','d','a','t'):
1699 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1700 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1701 return AVPROBE_SCORE_MAX;
1702 /* those are more common words, so rate then a bit less */
1703 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1704 case MKTAG('w','i','d','e'):
1705 case MKTAG('f','r','e','e'):
1706 case MKTAG('j','u','n','k'):
1707 case MKTAG('p','i','c','t'):
1708 return AVPROBE_SCORE_MAX - 5;
1709 case MKTAG(0x82,0x82,0x7f,0x7d ):
1710 case MKTAG('f','t','y','p'):
1711 case MKTAG('s','k','i','p'):
1712 case MKTAG('u','u','i','d'):
1713 case MKTAG('p','r','f','l'):
1714 offset = AV_RB32(p->buf+offset) + offset;
1715 /* if we only find those cause probedata is too small at least rate them */
1716 score = AVPROBE_SCORE_MAX - 50;
1717 break;
1718 default:
1719 /* unrecognized tag */
1720 return score;
1721 }
1722 }
1723 return score;
1724 }
1725
1726 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1727 {
1728 MOVContext *mov = s->priv_data;
1729 ByteIOContext *pb = s->pb;
1730 int err;
1731 MOV_atom_t atom = { 0, 0, 0 };
1732
1733 mov->fc = s;
1734 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1735 if(!url_is_streamed(pb))
1736 atom.size = url_fsize(pb);
1737 else
1738 atom.size = INT64_MAX;
1739
1740 /* check MOV header */
1741 if ((err = mov_read_default(mov, pb, atom)) < 0) {
1742 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1743 return err;
1744 }
1745 if (!mov->found_moov) {
1746 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1747 return -1;
1748 }
1749 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1750
1751 return 0;
1752 }
1753
1754 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1755 {
1756 MOVContext *mov = s->priv_data;
1757 MOVStreamContext *sc = 0;
1758 AVIndexEntry *sample = 0;
1759 int64_t best_dts = INT64_MAX;
1760 int i;
1761 retry:
1762 for (i = 0; i < s->nb_streams; i++) {
1763 AVStream *st = s->streams[i];
1764 MOVStreamContext *msc = st->priv_data;
1765 if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1766 AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1767 int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1768 AV_TIME_BASE, msc->time_scale);
1769 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1770 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1771 (!url_is_streamed(s->pb) &&
1772 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1773 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1774 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1775 sample = current_sample;
1776 best_dts = dts;
1777 sc = msc;
1778 }
1779 }
1780 }
1781 if (!sample) {
1782 mov->found_mdat = 0;
1783 if (!url_is_streamed(s->pb) ||
1784 mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1785 url_feof(s->pb))
1786 return -1;
1787 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1788 goto retry;
1789 }
1790 /* must be done just before reading, to avoid infinite loop on sample */
1791 sc->current_sample++;
1792 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1793 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1794 sc->ffindex, sample->pos);
1795 return -1;
1796 }
1797 av_get_packet(sc->pb, pkt, sample->size);
1798 #ifdef CONFIG_DV_DEMUXER
1799 if (mov->dv_demux && sc->dv_audio_container) {
1800 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1801 av_free(pkt->data);
1802 pkt->size = 0;
1803 if (dv_get_packet(mov->dv_demux, pkt) < 0)
1804 return -1;
1805 }
1806 #endif
1807 pkt->stream_index = sc->ffindex;
1808 pkt->dts = sample->timestamp;
1809 if (sc->ctts_data) {
1810 assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1811 pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1812 /* update ctts context */
1813 sc->sample_to_ctime_sample++;
1814 if (sc->sample_to_ctime_index < sc->ctts_count &&
1815 sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1816 sc->sample_to_ctime_index++;
1817 sc->sample_to_ctime_sample = 0;
1818 }
1819 } else {
1820 AVStream *st = s->streams[sc->ffindex];
1821 int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1822 st->index_entries[sc->current_sample].timestamp : st->duration;
1823 pkt->duration = next_dts - pkt->dts;
1824 pkt->pts = pkt->dts;
1825 }
1826 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1827 pkt->pos = sample->pos;
1828 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1829 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1830 return 0;
1831 }
1832
1833 static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1834 {
1835 MOVStreamContext *sc = st->priv_data;
1836 int sample, time_sample;
1837 int i;
1838
1839 sample = av_index_search_timestamp(st, timestamp, flags);
1840 dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1841 if (sample < 0) /* not sure what to do */
1842 return -1;
1843 sc->current_sample = sample;
1844 dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1845 /* adjust ctts index */
1846 if (sc->ctts_data) {
1847 time_sample = 0;
1848 for (i = 0; i < sc->ctts_count; i++) {
1849 int next = time_sample + sc->ctts_data[i].count;
1850 if (next > sc->current_sample) {
1851 sc->sample_to_ctime_index = i;
1852 sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1853 break;
1854 }
1855 time_sample = next;
1856 }
1857 }
1858 return sample;
1859 }
1860
1861 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1862 {
1863 AVStream *st;
1864 int64_t seek_timestamp, timestamp;
1865 int sample;
1866 int i;
1867
1868 if (stream_index >= s->nb_streams)
1869 return -1;
1870
1871 st = s->streams[stream_index];
1872 sample = mov_seek_stream(st, sample_time, flags);
1873 if (sample < 0)
1874 return -1;
1875
1876 /* adjust seek timestamp to found sample timestamp */
1877 seek_timestamp = st->index_entries[sample].timestamp;
1878
1879 for (i = 0; i < s->nb_streams; i++) {
1880 st = s->streams[i];
1881 if (stream_index == i || st->discard == AVDISCARD_ALL)
1882 continue;
1883
1884 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1885 mov_seek_stream(st, timestamp, flags);
1886 }
1887 return 0;
1888 }
1889
1890 static int mov_read_close(AVFormatContext *s)
1891 {
1892 int i, j;
1893 MOVContext *mov = s->priv_data;
1894 for(i=0; i<s->nb_streams; i++) {
1895 MOVStreamContext *sc = s->streams[i]->priv_data;
1896 av_freep(&sc->ctts_data);
1897 for (j=0; j<sc->drefs_count; j++)
1898 av_freep(&sc->drefs[j].path);
1899 av_freep(&sc->drefs);
1900 if (sc->pb && sc->pb != s->pb)
1901 url_fclose(sc->pb);
1902 }
1903 if(mov->dv_demux){
1904 for(i=0; i<mov->dv_fctx->nb_streams; i++){
1905 av_freep(&mov->dv_fctx->streams[i]->codec);
1906 av_freep(&mov->dv_fctx->streams[i]);
1907 }
1908 av_freep(&mov->dv_fctx);
1909 av_freep(&mov->dv_demux);
1910 }
1911 av_freep(&mov->trex_data);
1912 return 0;
1913 }
1914
1915 AVInputFormat mov_demuxer = {
1916 "mov,mp4,m4a,3gp,3g2,mj2",
1917 "QuickTime/MPEG4/Motion JPEG 2000 format",
1918 sizeof(MOVContext),
1919 mov_probe,
1920 mov_read_header,
1921 mov_read_packet,
1922 mov_read_close,
1923 mov_read_seek,
1924 };
An experimental fork of FFmpeg project for DVCPRO-HD developers