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Normalize triplets in gain_val_tab[][] so gain_exp_tab[] can be just an
[ffmpeg-lucabe.git] / libavformat / mov.c
blob73ed11ddade5c5093865d1f084d6bb2bf7debfd0
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 > 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 case CODEC_ID_PCM_F32BE:
569 st->codec->codec_id = CODEC_ID_PCM_F32LE;
570 break;
571 case CODEC_ID_PCM_F64BE:
572 st->codec->codec_id = CODEC_ID_PCM_F64LE;
573 break;
574 default:
575 break;
576 }
577 }
578 return 0;
579 }
580
581 /* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
582 static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
583 {
584 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
585 uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
586 uint8_t *buf;
587 if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
588 return -1;
589 buf= av_realloc(st->codec->extradata, size);
590 if(!buf)
591 return -1;
592 st->codec->extradata= buf;
593 buf+= st->codec->extradata_size;
594 st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
595 AV_WB32( buf , atom.size + 8);
596 AV_WL32( buf + 4, atom.type);
597 get_buffer(pb, buf + 8, atom.size);
598 return 0;
599 }
600
601 static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
602 {
603 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
604
605 if((uint64_t)atom.size > (1<<30))
606 return -1;
607
608 if (st->codec->codec_id == CODEC_ID_QDM2) {
609 // pass all frma atom to codec, needed at least for QDM2
610 av_free(st->codec->extradata);
611 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
612 if (!st->codec->extradata)
613 return AVERROR(ENOMEM);
614 st->codec->extradata_size = atom.size;
615 get_buffer(pb, st->codec->extradata, atom.size);
616 } else if (atom.size > 8) { /* to read frma, esds atoms */
617 if (mov_read_default(c, pb, atom) < 0)
618 return -1;
619 } else
620 url_fskip(pb, atom.size);
621 return 0;
622 }
623
624 /**
625 * This function reads atom content and puts data in extradata without tag
626 * nor size unlike mov_read_extradata.
627 */
628 static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
629 {
630 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
631
632 if((uint64_t)atom.size > (1<<30))
633 return -1;
634
635 av_free(st->codec->extradata);
636 st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
637 if (!st->codec->extradata)
638 return AVERROR(ENOMEM);
639 st->codec->extradata_size = atom.size;
640 get_buffer(pb, st->codec->extradata, atom.size);
641 return 0;
642 }
643
644 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
645 {
646 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
647 MOVStreamContext *sc = st->priv_data;
648 unsigned int i, entries;
649
650 get_byte(pb); /* version */
651 get_be24(pb); /* flags */
652
653 entries = get_be32(pb);
654
655 if(entries >= UINT_MAX/sizeof(int64_t))
656 return -1;
657
658 sc->chunk_count = entries;
659 sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
660 if (!sc->chunk_offsets)
661 return -1;
662 if (atom.type == MKTAG('s','t','c','o'))
663 for(i=0; i<entries; i++)
664 sc->chunk_offsets[i] = get_be32(pb);
665 else if (atom.type == MKTAG('c','o','6','4'))
666 for(i=0; i<entries; i++)
667 sc->chunk_offsets[i] = get_be64(pb);
668 else
669 return -1;
670
671 return 0;
672 }
673
674 /**
675 * Compute codec id for 'lpcm' tag.
676 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
677 */
678 static int mov_get_lpcm_codec_id(int bps, int flags)
679 {
680 if (flags & 1) { // floating point
681 if (flags & 2) { // big endian
682 if (bps == 32) return CODEC_ID_PCM_F32BE;
683 else if (bps == 64) return CODEC_ID_PCM_F64BE;
684 } else {
685 if (bps == 32) return CODEC_ID_PCM_F32LE;
686 else if (bps == 64) return CODEC_ID_PCM_F64LE;
687 }
688 } else {
689 if (flags & 2) {
690 if (bps == 8)
691 // signed integer
692 if (flags & 4) return CODEC_ID_PCM_S8;
693 else return CODEC_ID_PCM_U8;
694 else if (bps == 16) return CODEC_ID_PCM_S16BE;
695 else if (bps == 24) return CODEC_ID_PCM_S24BE;
696 else if (bps == 32) return CODEC_ID_PCM_S32BE;
697 } else {
698 if (bps == 8)
699 if (flags & 4) return CODEC_ID_PCM_S8;
700 else return CODEC_ID_PCM_U8;
701 else if (bps == 16) return CODEC_ID_PCM_S16LE;
702 else if (bps == 24) return CODEC_ID_PCM_S24LE;
703 else if (bps == 32) return CODEC_ID_PCM_S32LE;
704 }
705 }
706 return 0;
707 }
708
709 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
710 {
711 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
712 MOVStreamContext *sc = st->priv_data;
713 int j, entries, pseudo_stream_id;
714
715 get_byte(pb); /* version */
716 get_be24(pb); /* flags */
717
718 entries = get_be32(pb);
719
720 for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
721 //Parsing Sample description table
722 enum CodecID id;
723 int dref_id;
724 MOV_atom_t a = { 0, 0, 0 };
725 offset_t start_pos = url_ftell(pb);
726 int size = get_be32(pb); /* size */
727 uint32_t format = get_le32(pb); /* data format */
728
729 get_be32(pb); /* reserved */
730 get_be16(pb); /* reserved */
731 dref_id = get_be16(pb);
732
733 if (st->codec->codec_tag &&
734 st->codec->codec_tag != format &&
735 (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
736 : st->codec->codec_tag != MKTAG('j','p','e','g'))
737 ){
738 /* Multiple fourcc, we skip JPEG. This is not correct, we should
739 * export it as a separate AVStream but this needs a few changes
740 * in the MOV demuxer, patch welcome. */
741 av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
742 url_fskip(pb, size - (url_ftell(pb) - start_pos));
743 continue;
744 }
745 sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
746 sc->dref_id= dref_id;
747
748 st->codec->codec_tag = format;
749 id = codec_get_id(codec_movaudio_tags, format);
750 if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
751 id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
752
753 if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
754 st->codec->codec_type = CODEC_TYPE_AUDIO;
755 } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
756 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
757 id = codec_get_id(codec_movvideo_tags, format);
758 if (id <= 0)
759 id = codec_get_id(codec_bmp_tags, format);
760 if (id > 0)
761 st->codec->codec_type = CODEC_TYPE_VIDEO;
762 else if(st->codec->codec_type == CODEC_TYPE_DATA){
763 id = codec_get_id(ff_codec_movsubtitle_tags, format);
764 if(id > 0)
765 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
766 }
767 }
768
769 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
770 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
771 (format >> 24) & 0xff, st->codec->codec_type);
772
773 if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
774 uint8_t codec_name[32];
775 unsigned int color_depth;
776 int color_greyscale;
777
778 st->codec->codec_id = id;
779 get_be16(pb); /* version */
780 get_be16(pb); /* revision level */
781 get_be32(pb); /* vendor */
782 get_be32(pb); /* temporal quality */
783 get_be32(pb); /* spatial quality */
784
785 st->codec->width = get_be16(pb); /* width */
786 st->codec->height = get_be16(pb); /* height */
787
788 get_be32(pb); /* horiz resolution */
789 get_be32(pb); /* vert resolution */
790 get_be32(pb); /* data size, always 0 */
791 get_be16(pb); /* frames per samples */
792
793 get_buffer(pb, codec_name, 32); /* codec name, pascal string */
794 if (codec_name[0] <= 31) {
795 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
796 st->codec->codec_name[codec_name[0]] = 0;
797 }
798
799 st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
800 st->codec->color_table_id = get_be16(pb); /* colortable id */
801 dprintf(c->fc, "depth %d, ctab id %d\n",
802 st->codec->bits_per_coded_sample, st->codec->color_table_id);
803 /* figure out the palette situation */
804 color_depth = st->codec->bits_per_coded_sample & 0x1F;
805 color_greyscale = st->codec->bits_per_coded_sample & 0x20;
806
807 /* if the depth is 2, 4, or 8 bpp, file is palettized */
808 if ((color_depth == 2) || (color_depth == 4) ||
809 (color_depth == 8)) {
810 /* for palette traversal */
811 unsigned int color_start, color_count, color_end;
812 unsigned char r, g, b;
813
814 if (color_greyscale) {
815 int color_index, color_dec;
816 /* compute the greyscale palette */
817 st->codec->bits_per_coded_sample = color_depth;
818 color_count = 1 << color_depth;
819 color_index = 255;
820 color_dec = 256 / (color_count - 1);
821 for (j = 0; j < color_count; j++) {
822 r = g = b = color_index;
823 c->palette_control.palette[j] =
824 (r << 16) | (g << 8) | (b);
825 color_index -= color_dec;
826 if (color_index < 0)
827 color_index = 0;
828 }
829 } else if (st->codec->color_table_id) {
830 const uint8_t *color_table;
831 /* if flag bit 3 is set, use the default palette */
832 color_count = 1 << color_depth;
833 if (color_depth == 2)
834 color_table = ff_qt_default_palette_4;
835 else if (color_depth == 4)
836 color_table = ff_qt_default_palette_16;
837 else
838 color_table = ff_qt_default_palette_256;
839
840 for (j = 0; j < color_count; j++) {
841 r = color_table[j * 4 + 0];
842 g = color_table[j * 4 + 1];
843 b = color_table[j * 4 + 2];
844 c->palette_control.palette[j] =
845 (r << 16) | (g << 8) | (b);
846 }
847 } else {
848 /* load the palette from the file */
849 color_start = get_be32(pb);
850 color_count = get_be16(pb);
851 color_end = get_be16(pb);
852 if ((color_start <= 255) &&
853 (color_end <= 255)) {
854 for (j = color_start; j <= color_end; j++) {
855 /* each R, G, or B component is 16 bits;
856 * only use the top 8 bits; skip alpha bytes
857 * up front */
858 get_byte(pb);
859 get_byte(pb);
860 r = get_byte(pb);
861 get_byte(pb);
862 g = get_byte(pb);
863 get_byte(pb);
864 b = get_byte(pb);
865 get_byte(pb);
866 c->palette_control.palette[j] =
867 (r << 16) | (g << 8) | (b);
868 }
869 }
870 }
871 st->codec->palctrl = &c->palette_control;
872 st->codec->palctrl->palette_changed = 1;
873 } else
874 st->codec->palctrl = NULL;
875 } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
876 int bits_per_sample, flags;
877 uint16_t version = get_be16(pb);
878
879 st->codec->codec_id = id;
880 get_be16(pb); /* revision level */
881 get_be32(pb); /* vendor */
882
883 st->codec->channels = get_be16(pb); /* channel count */
884 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
885 st->codec->bits_per_coded_sample = get_be16(pb); /* sample size */
886
887 sc->audio_cid = get_be16(pb);
888 get_be16(pb); /* packet size = 0 */
889
890 st->codec->sample_rate = ((get_be32(pb) >> 16));
891
892 //Read QT version 1 fields. In version 0 these do not exist.
893 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
894 if(!c->isom) {
895 if(version==1) {
896 sc->samples_per_frame = get_be32(pb);
897 get_be32(pb); /* bytes per packet */
898 sc->bytes_per_frame = get_be32(pb);
899 get_be32(pb); /* bytes per sample */
900 } else if(version==2) {
901 get_be32(pb); /* sizeof struct only */
902 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
903 st->codec->channels = get_be32(pb);
904 get_be32(pb); /* always 0x7F000000 */
905 st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
906 flags = get_be32(pb); /* lcpm format specific flag */
907 sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
908 sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
909 if (format == MKTAG('l','p','c','m'))
910 st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
911 }
912 }
913
914 switch (st->codec->codec_id) {
915 case CODEC_ID_PCM_S8:
916 case CODEC_ID_PCM_U8:
917 if (st->codec->bits_per_coded_sample == 16)
918 st->codec->codec_id = CODEC_ID_PCM_S16BE;
919 break;
920 case CODEC_ID_PCM_S16LE:
921 case CODEC_ID_PCM_S16BE:
922 if (st->codec->bits_per_coded_sample == 8)
923 st->codec->codec_id = CODEC_ID_PCM_S8;
924 else if (st->codec->bits_per_coded_sample == 24)
925 st->codec->codec_id =
926 st->codec->codec_id == CODEC_ID_PCM_S16BE ?
927 CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
928 break;
929 /* set values for old format before stsd version 1 appeared */
930 case CODEC_ID_MACE3:
931 sc->samples_per_frame = 6;
932 sc->bytes_per_frame = 2*st->codec->channels;
933 break;
934 case CODEC_ID_MACE6:
935 sc->samples_per_frame = 6;
936 sc->bytes_per_frame = 1*st->codec->channels;
937 break;
938 case CODEC_ID_ADPCM_IMA_QT:
939 sc->samples_per_frame = 64;
940 sc->bytes_per_frame = 34*st->codec->channels;
941 break;
942 case CODEC_ID_GSM:
943 sc->samples_per_frame = 160;
944 sc->bytes_per_frame = 33;
945 break;
946 default:
947 break;
948 }
949
950 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
951 if (bits_per_sample) {
952 st->codec->bits_per_coded_sample = bits_per_sample;
953 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
954 }
955 } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
956 st->codec->codec_id= id;
957 } else {
958 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
959 url_fskip(pb, size - (url_ftell(pb) - start_pos));
960 }
961 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
962 a.size = size - (url_ftell(pb) - start_pos);
963 if (a.size > 8) {
964 if (mov_read_default(c, pb, a) < 0)
965 return -1;
966 } else if (a.size > 0)
967 url_fskip(pb, a.size);
968 }
969
970 if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
971 st->codec->sample_rate= sc->time_scale;
972
973 /* special codec parameters handling */
974 switch (st->codec->codec_id) {
975 #ifdef CONFIG_DV_DEMUXER
976 case CODEC_ID_DVAUDIO:
977 c->dv_fctx = av_alloc_format_context();
978 c->dv_demux = dv_init_demux(c->dv_fctx);
979 if (!c->dv_demux) {
980 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
981 return -1;
982 }
983 sc->dv_audio_container = 1;
984 st->codec->codec_id = CODEC_ID_PCM_S16LE;
985 break;
986 #endif
987 /* no ifdef since parameters are always those */
988 case CODEC_ID_AMR_WB:
989 st->codec->sample_rate= 16000;
990 st->codec->channels= 1; /* really needed */
991 break;
992 case CODEC_ID_QCELP:
993 case CODEC_ID_AMR_NB:
994 st->codec->frame_size= sc->samples_per_frame;
995 st->codec->sample_rate= 8000;
996 st->codec->channels= 1; /* really needed */
997 break;
998 case CODEC_ID_MP2:
999 case CODEC_ID_MP3:
1000 st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1001 st->need_parsing = AVSTREAM_PARSE_FULL;
1002 break;
1003 case CODEC_ID_GSM:
1004 case CODEC_ID_ADPCM_MS:
1005 case CODEC_ID_ADPCM_IMA_WAV:
1006 st->codec->block_align = sc->bytes_per_frame;
1007 break;
1008 case CODEC_ID_ALAC:
1009 if (st->codec->extradata_size == 36)
1010 st->codec->frame_size = AV_RB32((st->codec->extradata+12));
1011 break;
1012 default:
1013 break;
1014 }
1015
1016 return 0;
1017 }
1018
1019 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1020 {
1021 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1022 MOVStreamContext *sc = st->priv_data;
1023 unsigned int i, entries;
1024
1025 get_byte(pb); /* version */
1026 get_be24(pb); /* flags */
1027
1028 entries = get_be32(pb);
1029
1030 if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
1031 return -1;
1032
1033 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1034
1035 sc->sample_to_chunk_sz = entries;
1036 sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
1037 if (!sc->sample_to_chunk)
1038 return -1;
1039 for(i=0; i<entries; i++) {
1040 sc->sample_to_chunk[i].first = get_be32(pb);
1041 sc->sample_to_chunk[i].count = get_be32(pb);
1042 sc->sample_to_chunk[i].id = get_be32(pb);
1043 }
1044 return 0;
1045 }
1046
1047 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1048 {
1049 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1050 MOVStreamContext *sc = st->priv_data;
1051 unsigned int i, entries;
1052
1053 get_byte(pb); /* version */
1054 get_be24(pb); /* flags */
1055
1056 entries = get_be32(pb);
1057
1058 if(entries >= UINT_MAX / sizeof(int))
1059 return -1;
1060
1061 sc->keyframe_count = entries;
1062
1063 dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1064
1065 sc->keyframes = av_malloc(entries * sizeof(int));
1066 if (!sc->keyframes)
1067 return -1;
1068 for(i=0; i<entries; i++) {
1069 sc->keyframes[i] = get_be32(pb);
1070 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1071 }
1072 return 0;
1073 }
1074
1075 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1076 {
1077 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1078 MOVStreamContext *sc = st->priv_data;
1079 unsigned int i, entries, sample_size;
1080
1081 get_byte(pb); /* version */
1082 get_be24(pb); /* flags */
1083
1084 sample_size = get_be32(pb);
1085 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1086 sc->sample_size = sample_size;
1087 entries = get_be32(pb);
1088 if(entries >= UINT_MAX / sizeof(int))
1089 return -1;
1090
1091 sc->sample_count = entries;
1092 if (sample_size)
1093 return 0;
1094
1095 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1096
1097 sc->sample_sizes = av_malloc(entries * sizeof(int));
1098 if (!sc->sample_sizes)
1099 return -1;
1100 for(i=0; i<entries; i++)
1101 sc->sample_sizes[i] = get_be32(pb);
1102 return 0;
1103 }
1104
1105 static int mov_read_stts(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 int64_t duration=0;
1111 int64_t total_sample_count=0;
1112
1113 get_byte(pb); /* version */
1114 get_be24(pb); /* flags */
1115 entries = get_be32(pb);
1116 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1117 return -1;
1118
1119 sc->stts_count = entries;
1120 sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1121 if (!sc->stts_data)
1122 return -1;
1123 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1124
1125 sc->time_rate=0;
1126
1127 for(i=0; i<entries; i++) {
1128 int sample_duration;
1129 int sample_count;
1130
1131 sample_count=get_be32(pb);
1132 sample_duration = get_be32(pb);
1133 sc->stts_data[i].count= sample_count;
1134 sc->stts_data[i].duration= sample_duration;
1135
1136 sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1137
1138 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1139
1140 duration+=(int64_t)sample_duration*sample_count;
1141 total_sample_count+=sample_count;
1142 }
1143
1144 st->nb_frames= total_sample_count;
1145 if(duration)
1146 st->duration= duration;
1147 return 0;
1148 }
1149
1150 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1151 {
1152 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1153 MOVStreamContext *sc = st->priv_data;
1154 unsigned int i, entries;
1155
1156 get_byte(pb); /* version */
1157 get_be24(pb); /* flags */
1158 entries = get_be32(pb);
1159 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1160 return -1;
1161
1162 sc->ctts_count = entries;
1163 sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1164 if (!sc->ctts_data)
1165 return -1;
1166 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1167
1168 for(i=0; i<entries; i++) {
1169 int count =get_be32(pb);
1170 int duration =get_be32(pb);
1171
1172 if (duration < 0) {
1173 av_log(c->fc, AV_LOG_WARNING, "negative ctts, ignoring\n");
1174 sc->ctts_count = 0;
1175 url_fskip(pb, 8 * (entries - i - 1));
1176 break;
1177 }
1178 sc->ctts_data[i].count = count;
1179 sc->ctts_data[i].duration= duration;
1180
1181 sc->time_rate= ff_gcd(sc->time_rate, duration);
1182 }
1183 return 0;
1184 }
1185
1186 static void mov_build_index(MOVContext *mov, AVStream *st)
1187 {
1188 MOVStreamContext *sc = st->priv_data;
1189 offset_t current_offset;
1190 int64_t current_dts = 0;
1191 unsigned int stts_index = 0;
1192 unsigned int stsc_index = 0;
1193 unsigned int stss_index = 0;
1194 unsigned int i, j;
1195
1196 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1197 if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1198 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1199 unsigned int current_sample = 0;
1200 unsigned int stts_sample = 0;
1201 unsigned int keyframe, sample_size;
1202 unsigned int distance = 0;
1203 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1204
1205 st->nb_frames = sc->sample_count;
1206 for (i = 0; i < sc->chunk_count; i++) {
1207 current_offset = sc->chunk_offsets[i];
1208 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1209 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1210 stsc_index++;
1211 for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1212 if (current_sample >= sc->sample_count) {
1213 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1214 goto out;
1215 }
1216 keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1217 if (keyframe) {
1218 distance = 0;
1219 if (stss_index + 1 < sc->keyframe_count)
1220 stss_index++;
1221 }
1222 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1223 if(sc->pseudo_stream_id == -1 ||
1224 sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1225 av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1226 keyframe ? AVINDEX_KEYFRAME : 0);
1227 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1228 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1229 current_offset, current_dts, sample_size, distance, keyframe);
1230 }
1231 current_offset += sample_size;
1232 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1233 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1234 distance++;
1235 stts_sample++;
1236 current_sample++;
1237 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1238 stts_sample = 0;
1239 stts_index++;
1240 }
1241 }
1242 }
1243 } else { /* read whole chunk */
1244 unsigned int chunk_samples, chunk_size, chunk_duration;
1245 unsigned int frames = 1;
1246 for (i = 0; i < sc->chunk_count; i++) {
1247 current_offset = sc->chunk_offsets[i];
1248 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1249 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1250 stsc_index++;
1251 chunk_samples = sc->sample_to_chunk[stsc_index].count;
1252 /* get chunk size, beware of alaw/ulaw/mace */
1253 if (sc->samples_per_frame > 0 &&
1254 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1255 if (sc->samples_per_frame < 160)
1256 chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1257 else {
1258 chunk_size = sc->bytes_per_frame;
1259 frames = chunk_samples / sc->samples_per_frame;
1260 chunk_samples = sc->samples_per_frame;
1261 }
1262 } else
1263 chunk_size = chunk_samples * sc->sample_size;
1264 for (j = 0; j < frames; j++) {
1265 av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1266 /* get chunk duration */
1267 chunk_duration = 0;
1268 while (chunk_samples > 0) {
1269 if (chunk_samples < sc->stts_data[stts_index].count) {
1270 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1271 sc->stts_data[stts_index].count -= chunk_samples;
1272 break;
1273 } else {
1274 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1275 chunk_samples -= sc->stts_data[stts_index].count;
1276 if (stts_index + 1 < sc->stts_count)
1277 stts_index++;
1278 }
1279 }
1280 current_offset += sc->bytes_per_frame;
1281 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1282 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1283 chunk_size, chunk_duration);
1284 assert(chunk_duration % sc->time_rate == 0);
1285 current_dts += chunk_duration / sc->time_rate;
1286 }
1287 }
1288 }
1289 out:
1290 /* adjust sample count to avindex entries */
1291 sc->sample_count = st->nb_index_entries;
1292 }
1293
1294 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1295 {
1296 AVStream *st;
1297 MOVStreamContext *sc;
1298 int ret;
1299
1300 st = av_new_stream(c->fc, c->fc->nb_streams);
1301 if (!st) return AVERROR(ENOMEM);
1302 sc = av_mallocz(sizeof(MOVStreamContext));
1303 if (!sc) return AVERROR(ENOMEM);
1304
1305 st->priv_data = sc;
1306 st->codec->codec_type = CODEC_TYPE_DATA;
1307 st->start_time = 0; /* XXX: check */
1308
1309 if ((ret = mov_read_default(c, pb, atom)) < 0)
1310 return ret;
1311
1312 /* sanity checks */
1313 if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1314 (!sc->sample_size && !sc->sample_count))){
1315 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1316 st->index);
1317 sc->sample_count = 0; //ignore track
1318 return 0;
1319 }
1320 if(!sc->time_rate)
1321 sc->time_rate=1;
1322 if(!sc->time_scale)
1323 sc->time_scale= c->time_scale;
1324 av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1325
1326 if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1327 !st->codec->frame_size && sc->stts_count == 1)
1328 st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1329
1330 if(st->duration != AV_NOPTS_VALUE){
1331 assert(st->duration % sc->time_rate == 0);
1332 st->duration /= sc->time_rate;
1333 }
1334 sc->ffindex = st->index;
1335 mov_build_index(c, st);
1336
1337 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1338 if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1339 av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1340 st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1341 } else
1342 sc->pb = c->fc->pb;
1343
1344 switch (st->codec->codec_id) {
1345 #ifdef CONFIG_H261_DECODER
1346 case CODEC_ID_H261:
1347 #endif
1348 #ifdef CONFIG_H263_DECODER
1349 case CODEC_ID_H263:
1350 #endif
1351 #ifdef CONFIG_MPEG4_DECODER
1352 case CODEC_ID_MPEG4:
1353 #endif
1354 st->codec->width= 0; /* let decoder init width/height */
1355 st->codec->height= 0;
1356 break;
1357 }
1358
1359 /* Do not need those anymore. */
1360 av_freep(&sc->chunk_offsets);
1361 av_freep(&sc->sample_to_chunk);
1362 av_freep(&sc->sample_sizes);
1363 av_freep(&sc->keyframes);
1364 av_freep(&sc->stts_data);
1365
1366 return 0;
1367 }
1368
1369 static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1370 {
1371 uint16_t str_size = get_be16(pb); /* string length */;
1372
1373 get_be16(pb); /* skip language */
1374 get_buffer(pb, str, FFMIN(size, str_size));
1375 }
1376
1377 static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1378 {
1379 uint64_t end = url_ftell(pb) + atom.size;
1380
1381 while (url_ftell(pb) + 8 < end) {
1382 uint32_t tag_size = get_be32(pb);
1383 uint32_t tag = get_le32(pb);
1384 uint64_t next = url_ftell(pb) + tag_size - 8;
1385
1386 if (next > end) // stop if tag_size is wrong
1387 break;
1388
1389 switch (tag) {
1390 case MKTAG(0xa9,'n','a','m'):
1391 mov_parse_udta_string(pb, c->fc->title, sizeof(c->fc->title));
1392 break;
1393 case MKTAG(0xa9,'w','r','t'):
1394 mov_parse_udta_string(pb, c->fc->author, sizeof(c->fc->author));
1395 break;
1396 case MKTAG(0xa9,'c','p','y'):
1397 mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1398 break;
1399 case MKTAG(0xa9,'i','n','f'):
1400 mov_parse_udta_string(pb, c->fc->comment, sizeof(c->fc->comment));
1401 break;
1402 default:
1403 break;
1404 }
1405
1406 url_fseek(pb, next, SEEK_SET);
1407 }
1408
1409 return 0;
1410 }
1411
1412 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1413 {
1414 int i;
1415 int width;
1416 int height;
1417 int64_t disp_transform[2];
1418 int display_matrix[3][2];
1419 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1420 int version = get_byte(pb);
1421
1422 get_be24(pb); /* flags */
1423 /*
1424 MOV_TRACK_ENABLED 0x0001
1425 MOV_TRACK_IN_MOVIE 0x0002
1426 MOV_TRACK_IN_PREVIEW 0x0004
1427 MOV_TRACK_IN_POSTER 0x0008
1428 */
1429
1430 if (version == 1) {
1431 get_be64(pb);
1432 get_be64(pb);
1433 } else {
1434 get_be32(pb); /* creation time */
1435 get_be32(pb); /* modification time */
1436 }
1437 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1438 get_be32(pb); /* reserved */
1439 st->start_time = 0; /* check */
1440 /* highlevel (considering edits) duration in movie timebase */
1441 (version == 1) ? get_be64(pb) : get_be32(pb);
1442 get_be32(pb); /* reserved */
1443 get_be32(pb); /* reserved */
1444
1445 get_be16(pb); /* layer */
1446 get_be16(pb); /* alternate group */
1447 get_be16(pb); /* volume */
1448 get_be16(pb); /* reserved */
1449
1450 //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1451 // they're kept in fixed point format through all calculations
1452 // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1453 for (i = 0; i < 3; i++) {
1454 display_matrix[i][0] = get_be32(pb); // 16.16 fixed point
1455 display_matrix[i][1] = get_be32(pb); // 16.16 fixed point
1456 get_be32(pb); // 2.30 fixed point (not used)
1457 }
1458
1459 width = get_be32(pb); // 16.16 fixed point track width
1460 height = get_be32(pb); // 16.16 fixed point track height
1461
1462 //transform the display width/height according to the matrix
1463 // skip this if the display matrix is the default identity matrix
1464 // to keep the same scale, use [width height 1<<16]
1465 if (width && height &&
1466 (display_matrix[0][0] != 65536 || display_matrix[0][1] ||
1467 display_matrix[1][0] || display_matrix[1][1] != 65536 ||
1468 display_matrix[2][0] || display_matrix[2][1])) {
1469 for (i = 0; i < 2; i++)
1470 disp_transform[i] =
1471 (int64_t) width * display_matrix[0][i] +
1472 (int64_t) height * display_matrix[1][i] +
1473 ((int64_t) display_matrix[2][i] << 16);
1474
1475 //sample aspect ratio is new width/height divided by old width/height
1476 st->sample_aspect_ratio = av_d2q(
1477 ((double) disp_transform[0] * height) /
1478 ((double) disp_transform[1] * width), INT_MAX);
1479 }
1480 return 0;
1481 }
1482
1483 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1484 {
1485 MOVFragment *frag = &c->fragment;
1486 MOVTrackExt *trex = NULL;
1487 int flags, track_id, i;
1488
1489 get_byte(pb); /* version */
1490 flags = get_be24(pb);
1491
1492 track_id = get_be32(pb);
1493 if (!track_id || track_id > c->fc->nb_streams)
1494 return -1;
1495 frag->track_id = track_id;
1496 for (i = 0; i < c->trex_count; i++)
1497 if (c->trex_data[i].track_id == frag->track_id) {
1498 trex = &c->trex_data[i];
1499 break;
1500 }
1501 if (!trex) {
1502 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1503 return -1;
1504 }
1505
1506 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1507 else frag->base_data_offset = frag->moof_offset;
1508 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1509 else frag->stsd_id = trex->stsd_id;
1510
1511 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1512 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1513 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1514 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1515 return 0;
1516 }
1517
1518 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1519 {
1520 MOVTrackExt *trex;
1521
1522 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1523 return -1;
1524 c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1525 if (!c->trex_data)
1526 return AVERROR(ENOMEM);
1527 trex = &c->trex_data[c->trex_count++];
1528 get_byte(pb); /* version */
1529 get_be24(pb); /* flags */
1530 trex->track_id = get_be32(pb);
1531 trex->stsd_id = get_be32(pb);
1532 trex->duration = get_be32(pb);
1533 trex->size = get_be32(pb);
1534 trex->flags = get_be32(pb);
1535 return 0;
1536 }
1537
1538 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1539 {
1540 MOVFragment *frag = &c->fragment;
1541 AVStream *st;
1542 MOVStreamContext *sc;
1543 uint64_t offset;
1544 int64_t dts;
1545 int data_offset = 0;
1546 unsigned entries, first_sample_flags = frag->flags;
1547 int flags, distance, i;
1548
1549 if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1550 return -1;
1551 st = c->fc->streams[frag->track_id-1];
1552 sc = st->priv_data;
1553 if (sc->pseudo_stream_id+1 != frag->stsd_id)
1554 return 0;
1555 get_byte(pb); /* version */
1556 flags = get_be24(pb);
1557 entries = get_be32(pb);
1558 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1559 if (flags & 0x001) data_offset = get_be32(pb);
1560 if (flags & 0x004) first_sample_flags = get_be32(pb);
1561 if (flags & 0x800) {
1562 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1563 return -1;
1564 sc->ctts_data = av_realloc(sc->ctts_data,
1565 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1566 if (!sc->ctts_data)
1567 return AVERROR(ENOMEM);
1568 }
1569 dts = st->duration;
1570 offset = frag->base_data_offset + data_offset;
1571 distance = 0;
1572 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1573 for (i = 0; i < entries; i++) {
1574 unsigned sample_size = frag->size;
1575 int sample_flags = i ? frag->flags : first_sample_flags;
1576 unsigned sample_duration = frag->duration;
1577 int keyframe;
1578
1579 if (flags & 0x100) sample_duration = get_be32(pb);
1580 if (flags & 0x200) sample_size = get_be32(pb);
1581 if (flags & 0x400) sample_flags = get_be32(pb);
1582 if (flags & 0x800) {
1583 sc->ctts_data[sc->ctts_count].count = 1;
1584 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1585 sc->ctts_count++;
1586 }
1587 if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1588 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1589 distance = 0;
1590 av_add_index_entry(st, offset, dts, sample_size, distance,
1591 keyframe ? AVINDEX_KEYFRAME : 0);
1592 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1593 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1594 offset, dts, sample_size, distance, keyframe);
1595 distance++;
1596 assert(sample_duration % sc->time_rate == 0);
1597 dts += sample_duration / sc->time_rate;
1598 offset += sample_size;
1599 }
1600 frag->moof_offset = offset;
1601 sc->sample_count = st->nb_index_entries;
1602 st->duration = dts;
1603 return 0;
1604 }
1605
1606 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1607 /* like the files created with Adobe Premiere 5.0, for samples see */
1608 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1609 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1610 {
1611 int err;
1612
1613 if (atom.size < 8)
1614 return 0; /* continue */
1615 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1616 url_fskip(pb, atom.size - 4);
1617 return 0;
1618 }
1619 atom.type = get_le32(pb);
1620 atom.offset += 8;
1621 atom.size -= 8;
1622 if (atom.type != MKTAG('m','d','a','t')) {
1623 url_fskip(pb, atom.size);
1624 return 0;
1625 }
1626 err = mov_read_mdat(c, pb, atom);
1627 return err;
1628 }
1629
1630 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1631 {
1632 #ifdef CONFIG_ZLIB
1633 ByteIOContext ctx;
1634 uint8_t *cmov_data;
1635 uint8_t *moov_data; /* uncompressed data */
1636 long cmov_len, moov_len;
1637 int ret = -1;
1638
1639 get_be32(pb); /* dcom atom */
1640 if (get_le32(pb) != MKTAG('d','c','o','m'))
1641 return -1;
1642 if (get_le32(pb) != MKTAG('z','l','i','b')) {
1643 av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1644 return -1;
1645 }
1646 get_be32(pb); /* cmvd atom */
1647 if (get_le32(pb) != MKTAG('c','m','v','d'))
1648 return -1;
1649 moov_len = get_be32(pb); /* uncompressed size */
1650 cmov_len = atom.size - 6 * 4;
1651
1652 cmov_data = av_malloc(cmov_len);
1653 if (!cmov_data)
1654 return -1;
1655 moov_data = av_malloc(moov_len);
1656 if (!moov_data) {
1657 av_free(cmov_data);
1658 return -1;
1659 }
1660 get_buffer(pb, cmov_data, cmov_len);
1661 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1662 goto free_and_return;
1663 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1664 goto free_and_return;
1665 atom.type = MKTAG('m','o','o','v');
1666 atom.offset = 0;
1667 atom.size = moov_len;
1668 #ifdef DEBUG
1669 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1670 #endif
1671 ret = mov_read_default(c, &ctx, atom);
1672 free_and_return:
1673 av_free(moov_data);
1674 av_free(cmov_data);
1675 return ret;
1676 #else
1677 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1678 return -1;
1679 #endif
1680 }
1681
1682 /* edit list atom */
1683 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1684 {
1685 MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1686 int i, edit_count;
1687
1688 get_byte(pb); /* version */
1689 get_be24(pb); /* flags */
1690 edit_count= sc->edit_count = get_be32(pb); /* entries */
1691
1692 for(i=0; i<edit_count; i++){
1693 int time;
1694 get_be32(pb); /* Track duration */
1695 time = get_be32(pb); /* Media time */
1696 get_be32(pb); /* Media rate */
1697 if (time != 0)
1698 av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1699 "a/v desync might occur, patch welcome\n");
1700 }
1701 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1702 return 0;
1703 }
1704
1705 static const MOVParseTableEntry mov_default_parse_table[] = {
1706 { MKTAG('a','v','s','s'), mov_read_extradata },
1707 { MKTAG('c','o','6','4'), mov_read_stco },
1708 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1709 { MKTAG('d','i','n','f'), mov_read_default },
1710 { MKTAG('d','r','e','f'), mov_read_dref },
1711 { MKTAG('e','d','t','s'), mov_read_default },
1712 { MKTAG('e','l','s','t'), mov_read_elst },
1713 { MKTAG('e','n','d','a'), mov_read_enda },
1714 { MKTAG('f','i','e','l'), mov_read_extradata },
1715 { MKTAG('f','t','y','p'), mov_read_ftyp },
1716 { MKTAG('g','l','b','l'), mov_read_glbl },
1717 { MKTAG('h','d','l','r'), mov_read_hdlr },
1718 { MKTAG('j','p','2','h'), mov_read_extradata },
1719 { MKTAG('m','d','a','t'), mov_read_mdat },
1720 { MKTAG('m','d','h','d'), mov_read_mdhd },
1721 { MKTAG('m','d','i','a'), mov_read_default },
1722 { MKTAG('m','i','n','f'), mov_read_default },
1723 { MKTAG('m','o','o','f'), mov_read_moof },
1724 { MKTAG('m','o','o','v'), mov_read_moov },
1725 { MKTAG('m','v','e','x'), mov_read_default },
1726 { MKTAG('m','v','h','d'), mov_read_mvhd },
1727 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1728 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1729 { MKTAG('a','v','c','C'), mov_read_glbl },
1730 { MKTAG('s','t','b','l'), mov_read_default },
1731 { MKTAG('s','t','c','o'), mov_read_stco },
1732 { MKTAG('s','t','s','c'), mov_read_stsc },
1733 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1734 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1735 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1736 { MKTAG('s','t','t','s'), mov_read_stts },
1737 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1738 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1739 { MKTAG('t','r','a','k'), mov_read_trak },
1740 { MKTAG('t','r','a','f'), mov_read_default },
1741 { MKTAG('t','r','e','x'), mov_read_trex },
1742 { MKTAG('t','r','u','n'), mov_read_trun },
1743 { MKTAG('u','d','t','a'), mov_read_udta },
1744 { MKTAG('w','a','v','e'), mov_read_wave },
1745 { MKTAG('e','s','d','s'), mov_read_esds },
1746 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1747 { MKTAG('c','m','o','v'), mov_read_cmov },
1748 { 0, NULL }
1749 };
1750
1751 static int mov_probe(AVProbeData *p)
1752 {
1753 unsigned int offset;
1754 uint32_t tag;
1755 int score = 0;
1756
1757 /* check file header */
1758 offset = 0;
1759 for(;;) {
1760 /* ignore invalid offset */
1761 if ((offset + 8) > (unsigned int)p->buf_size)
1762 return score;
1763 tag = AV_RL32(p->buf + offset + 4);
1764 switch(tag) {
1765 /* check for obvious tags */
1766 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1767 case MKTAG('m','o','o','v'):
1768 case MKTAG('m','d','a','t'):
1769 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1770 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1771 case MKTAG('f','t','y','p'):
1772 return AVPROBE_SCORE_MAX;
1773 /* those are more common words, so rate then a bit less */
1774 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1775 case MKTAG('w','i','d','e'):
1776 case MKTAG('f','r','e','e'):
1777 case MKTAG('j','u','n','k'):
1778 case MKTAG('p','i','c','t'):
1779 return AVPROBE_SCORE_MAX - 5;
1780 case MKTAG(0x82,0x82,0x7f,0x7d):
1781 case MKTAG('s','k','i','p'):
1782 case MKTAG('u','u','i','d'):
1783 case MKTAG('p','r','f','l'):
1784 offset = AV_RB32(p->buf+offset) + offset;
1785 /* if we only find those cause probedata is too small at least rate them */
1786 score = AVPROBE_SCORE_MAX - 50;
1787 break;
1788 default:
1789 /* unrecognized tag */
1790 return score;
1791 }
1792 }
1793 return score;
1794 }
1795
1796 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1797 {
1798 MOVContext *mov = s->priv_data;
1799 ByteIOContext *pb = s->pb;
1800 int err;
1801 MOV_atom_t atom = { 0, 0, 0 };
1802
1803 mov->fc = s;
1804 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1805 if(!url_is_streamed(pb))
1806 atom.size = url_fsize(pb);
1807 else
1808 atom.size = INT64_MAX;
1809
1810 /* check MOV header */
1811 if ((err = mov_read_default(mov, pb, atom)) < 0) {
1812 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1813 return err;
1814 }
1815 if (!mov->found_moov) {
1816 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1817 return -1;
1818 }
1819 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1820
1821 return 0;
1822 }
1823
1824 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1825 {
1826 MOVContext *mov = s->priv_data;
1827 MOVStreamContext *sc = 0;
1828 AVIndexEntry *sample = 0;
1829 int64_t best_dts = INT64_MAX;
1830 int i;
1831 retry:
1832 for (i = 0; i < s->nb_streams; i++) {
1833 AVStream *st = s->streams[i];
1834 MOVStreamContext *msc = st->priv_data;
1835 if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1836 AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1837 int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1838 AV_TIME_BASE, msc->time_scale);
1839 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1840 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1841 (!url_is_streamed(s->pb) &&
1842 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1843 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1844 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1845 sample = current_sample;
1846 best_dts = dts;
1847 sc = msc;
1848 }
1849 }
1850 }
1851 if (!sample) {
1852 mov->found_mdat = 0;
1853 if (!url_is_streamed(s->pb) ||
1854 mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1855 url_feof(s->pb))
1856 return -1;
1857 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1858 goto retry;
1859 }
1860 /* must be done just before reading, to avoid infinite loop on sample */
1861 sc->current_sample++;
1862 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1863 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1864 sc->ffindex, sample->pos);
1865 return -1;
1866 }
1867 av_get_packet(sc->pb, pkt, sample->size);
1868 #ifdef CONFIG_DV_DEMUXER
1869 if (mov->dv_demux && sc->dv_audio_container) {
1870 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1871 av_free(pkt->data);
1872 pkt->size = 0;
1873 if (dv_get_packet(mov->dv_demux, pkt) < 0)
1874 return -1;
1875 }
1876 #endif
1877 pkt->stream_index = sc->ffindex;
1878 pkt->dts = sample->timestamp;
1879 if (sc->ctts_data) {
1880 assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1881 pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1882 /* update ctts context */
1883 sc->sample_to_ctime_sample++;
1884 if (sc->sample_to_ctime_index < sc->ctts_count &&
1885 sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1886 sc->sample_to_ctime_index++;
1887 sc->sample_to_ctime_sample = 0;
1888 }
1889 } else {
1890 AVStream *st = s->streams[sc->ffindex];
1891 int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1892 st->index_entries[sc->current_sample].timestamp : st->duration;
1893 pkt->duration = next_dts - pkt->dts;
1894 pkt->pts = pkt->dts;
1895 }
1896 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1897 pkt->pos = sample->pos;
1898 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1899 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1900 return 0;
1901 }
1902
1903 static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1904 {
1905 MOVStreamContext *sc = st->priv_data;
1906 int sample, time_sample;
1907 int i;
1908
1909 sample = av_index_search_timestamp(st, timestamp, flags);
1910 dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1911 if (sample < 0) /* not sure what to do */
1912 return -1;
1913 sc->current_sample = sample;
1914 dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1915 /* adjust ctts index */
1916 if (sc->ctts_data) {
1917 time_sample = 0;
1918 for (i = 0; i < sc->ctts_count; i++) {
1919 int next = time_sample + sc->ctts_data[i].count;
1920 if (next > sc->current_sample) {
1921 sc->sample_to_ctime_index = i;
1922 sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1923 break;
1924 }
1925 time_sample = next;
1926 }
1927 }
1928 return sample;
1929 }
1930
1931 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1932 {
1933 AVStream *st;
1934 int64_t seek_timestamp, timestamp;
1935 int sample;
1936 int i;
1937
1938 if (stream_index >= s->nb_streams)
1939 return -1;
1940
1941 st = s->streams[stream_index];
1942 sample = mov_seek_stream(st, sample_time, flags);
1943 if (sample < 0)
1944 return -1;
1945
1946 /* adjust seek timestamp to found sample timestamp */
1947 seek_timestamp = st->index_entries[sample].timestamp;
1948
1949 for (i = 0; i < s->nb_streams; i++) {
1950 st = s->streams[i];
1951 if (stream_index == i || st->discard == AVDISCARD_ALL)
1952 continue;
1953
1954 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1955 mov_seek_stream(st, timestamp, flags);
1956 }
1957 return 0;
1958 }
1959
1960 static int mov_read_close(AVFormatContext *s)
1961 {
1962 int i, j;
1963 MOVContext *mov = s->priv_data;
1964 for(i=0; i<s->nb_streams; i++) {
1965 MOVStreamContext *sc = s->streams[i]->priv_data;
1966 av_freep(&sc->ctts_data);
1967 for (j=0; j<sc->drefs_count; j++)
1968 av_freep(&sc->drefs[j].path);
1969 av_freep(&sc->drefs);
1970 if (sc->pb && sc->pb != s->pb)
1971 url_fclose(sc->pb);
1972 }
1973 if(mov->dv_demux){
1974 for(i=0; i<mov->dv_fctx->nb_streams; i++){
1975 av_freep(&mov->dv_fctx->streams[i]->codec);
1976 av_freep(&mov->dv_fctx->streams[i]);
1977 }
1978 av_freep(&mov->dv_fctx);
1979 av_freep(&mov->dv_demux);
1980 }
1981 av_freep(&mov->trex_data);
1982 return 0;
1983 }
1984
1985 AVInputFormat mov_demuxer = {
1986 "mov,mp4,m4a,3gp,3g2,mj2",
1987 NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
1988 sizeof(MOVContext),
1989 mov_probe,
1990 mov_read_header,
1991 mov_read_packet,
1992 mov_read_close,
1993 mov_read_seek,
1994 };
lucabe's unfinished and experimental patches for ffmpeg