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 "mpeg4audio.h"
31 #include "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;
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
mov_read_default(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_dref(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_hdlr(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mp4_read_descr_len(ByteIOContext * pb)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
mp4_read_descr(MOVContext * c,ByteIOContext * pb,int * tag)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
mov_read_esds(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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 */
mov_read_mdat(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_ftyp(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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 */
mov_read_moov(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_moof(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_mdhd(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_mvhd(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_smi(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_enda(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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 */
mov_read_extradata(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_wave(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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 */
mov_read_glbl(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_stco(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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
mov_read_stsd(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)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 (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
694 : st->codec->codec_tag != MKTAG('j','p','e','g'))
695 ){
696 /* Multiple fourcc, we skip JPEG. This is not correct, we should
697 * export it as a separate AVStream but this needs a few changes
698 * in the MOV demuxer, patch welcome. */
699 url_fskip(pb, size - (url_ftell(pb) - start_pos));
700 continue;
701 }
702 sc->pseudo_stream_id= pseudo_stream_id;
703 sc->dref_id= dref_id;
704
705 st->codec->codec_tag = format;
706 id = codec_get_id(codec_movaudio_tags, format);
707 if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
708 id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
709
710 if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
711 st->codec->codec_type = CODEC_TYPE_AUDIO;
712 } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
713 format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
714 id = codec_get_id(codec_movvideo_tags, format);
715 if (id <= 0)
716 id = codec_get_id(codec_bmp_tags, format);
717 if (id > 0)
718 st->codec->codec_type = CODEC_TYPE_VIDEO;
719 else if(st->codec->codec_type == CODEC_TYPE_DATA){
720 id = codec_get_id(ff_codec_movsubtitle_tags, format);
721 if(id > 0)
722 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
723 }
724 }
725
726 dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
727 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
728 (format >> 24) & 0xff, st->codec->codec_type);
729
730 if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
731 uint8_t codec_name[32];
732 unsigned int color_depth;
733 int color_greyscale;
734
735 st->codec->codec_id = id;
736 get_be16(pb); /* version */
737 get_be16(pb); /* revision level */
738 get_be32(pb); /* vendor */
739 get_be32(pb); /* temporal quality */
740 get_be32(pb); /* spatial quality */
741
742 st->codec->width = get_be16(pb); /* width */
743 st->codec->height = get_be16(pb); /* height */
744
745 get_be32(pb); /* horiz resolution */
746 get_be32(pb); /* vert resolution */
747 get_be32(pb); /* data size, always 0 */
748 get_be16(pb); /* frames per samples */
749
750 get_buffer(pb, codec_name, 32); /* codec name, pascal string */
751 if (codec_name[0] <= 31) {
752 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
753 st->codec->codec_name[codec_name[0]] = 0;
754 }
755
756 st->codec->bits_per_sample = get_be16(pb); /* depth */
757 st->codec->color_table_id = get_be16(pb); /* colortable id */
758 dprintf(c->fc, "depth %d, ctab id %d\n",
759 st->codec->bits_per_sample, st->codec->color_table_id);
760 /* figure out the palette situation */
761 color_depth = st->codec->bits_per_sample & 0x1F;
762 color_greyscale = st->codec->bits_per_sample & 0x20;
763
764 /* if the depth is 2, 4, or 8 bpp, file is palettized */
765 if ((color_depth == 2) || (color_depth == 4) ||
766 (color_depth == 8)) {
767 /* for palette traversal */
768 unsigned int color_start, color_count, color_end;
769 unsigned char r, g, b;
770
771 if (color_greyscale) {
772 int color_index, color_dec;
773 /* compute the greyscale palette */
774 st->codec->bits_per_sample = color_depth;
775 color_count = 1 << color_depth;
776 color_index = 255;
777 color_dec = 256 / (color_count - 1);
778 for (j = 0; j < color_count; j++) {
779 r = g = b = color_index;
780 c->palette_control.palette[j] =
781 (r << 16) | (g << 8) | (b);
782 color_index -= color_dec;
783 if (color_index < 0)
784 color_index = 0;
785 }
786 } else if (st->codec->color_table_id) {
787 const uint8_t *color_table;
788 /* if flag bit 3 is set, use the default palette */
789 color_count = 1 << color_depth;
790 if (color_depth == 2)
791 color_table = ff_qt_default_palette_4;
792 else if (color_depth == 4)
793 color_table = ff_qt_default_palette_16;
794 else
795 color_table = ff_qt_default_palette_256;
796
797 for (j = 0; j < color_count; j++) {
798 r = color_table[j * 4 + 0];
799 g = color_table[j * 4 + 1];
800 b = color_table[j * 4 + 2];
801 c->palette_control.palette[j] =
802 (r << 16) | (g << 8) | (b);
803 }
804 } else {
805 /* load the palette from the file */
806 color_start = get_be32(pb);
807 color_count = get_be16(pb);
808 color_end = get_be16(pb);
809 if ((color_start <= 255) &&
810 (color_end <= 255)) {
811 for (j = color_start; j <= color_end; j++) {
812 /* each R, G, or B component is 16 bits;
813 * only use the top 8 bits; skip alpha bytes
814 * up front */
815 get_byte(pb);
816 get_byte(pb);
817 r = get_byte(pb);
818 get_byte(pb);
819 g = get_byte(pb);
820 get_byte(pb);
821 b = get_byte(pb);
822 get_byte(pb);
823 c->palette_control.palette[j] =
824 (r << 16) | (g << 8) | (b);
825 }
826 }
827 }
828 st->codec->palctrl = &c->palette_control;
829 st->codec->palctrl->palette_changed = 1;
830 } else
831 st->codec->palctrl = NULL;
832 } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
833 int bits_per_sample;
834 uint16_t version = get_be16(pb);
835
836 st->codec->codec_id = id;
837 get_be16(pb); /* revision level */
838 get_be32(pb); /* vendor */
839
840 st->codec->channels = get_be16(pb); /* channel count */
841 dprintf(c->fc, "audio channels %d\n", st->codec->channels);
842 st->codec->bits_per_sample = get_be16(pb); /* sample size */
843
844 sc->audio_cid = get_be16(pb);
845 get_be16(pb); /* packet size = 0 */
846
847 st->codec->sample_rate = ((get_be32(pb) >> 16));
848
849 switch (st->codec->codec_id) {
850 case CODEC_ID_PCM_S8:
851 case CODEC_ID_PCM_U8:
852 if (st->codec->bits_per_sample == 16)
853 st->codec->codec_id = CODEC_ID_PCM_S16BE;
854 break;
855 case CODEC_ID_PCM_S16LE:
856 case CODEC_ID_PCM_S16BE:
857 if (st->codec->bits_per_sample == 8)
858 st->codec->codec_id = CODEC_ID_PCM_S8;
859 else if (st->codec->bits_per_sample == 24)
860 st->codec->codec_id = CODEC_ID_PCM_S24BE;
861 break;
862 /* set values for old format before stsd version 1 appeared */
863 case CODEC_ID_MACE3:
864 sc->samples_per_frame = 6;
865 sc->bytes_per_frame = 2*st->codec->channels;
866 break;
867 case CODEC_ID_MACE6:
868 sc->samples_per_frame = 6;
869 sc->bytes_per_frame = 1*st->codec->channels;
870 break;
871 case CODEC_ID_ADPCM_IMA_QT:
872 sc->samples_per_frame = 64;
873 sc->bytes_per_frame = 34*st->codec->channels;
874 break;
875 case CODEC_ID_GSM:
876 sc->samples_per_frame = 160;
877 sc->bytes_per_frame = 33;
878 break;
879 default:
880 break;
881 }
882
883 //Read QT version 1 fields. In version 0 these do not exist.
884 dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
885 if(!c->isom) {
886 if(version==1) {
887 sc->samples_per_frame = get_be32(pb);
888 get_be32(pb); /* bytes per packet */
889 sc->bytes_per_frame = get_be32(pb);
890 get_be32(pb); /* bytes per sample */
891 } else if(version==2) {
892 get_be32(pb); /* sizeof struct only */
893 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
894 st->codec->channels = get_be32(pb);
895 get_be32(pb); /* always 0x7F000000 */
896 get_be32(pb); /* bits per channel if sound is uncompressed */
897 get_be32(pb); /* lcpm format specific flag */
898 get_be32(pb); /* bytes per audio packet if constant */
899 get_be32(pb); /* lpcm frames per audio packet if constant */
900 }
901 }
902
903 bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
904 if (bits_per_sample) {
905 st->codec->bits_per_sample = bits_per_sample;
906 sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
907 }
908 } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
909 st->codec->codec_id= id;
910 } else {
911 /* other codec type, just skip (rtp, mp4s, tmcd ...) */
912 url_fskip(pb, size - (url_ftell(pb) - start_pos));
913 }
914 /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
915 a.size = size - (url_ftell(pb) - start_pos);
916 if (a.size > 8) {
917 if (mov_read_default(c, pb, a) < 0)
918 return -1;
919 } else if (a.size > 0)
920 url_fskip(pb, a.size);
921 }
922
923 if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
924 st->codec->sample_rate= sc->time_scale;
925
926 /* special codec parameters handling */
927 switch (st->codec->codec_id) {
928 #ifdef CONFIG_DV_DEMUXER
929 case CODEC_ID_DVAUDIO:
930 c->dv_fctx = av_alloc_format_context();
931 c->dv_demux = dv_init_demux(c->dv_fctx);
932 if (!c->dv_demux) {
933 av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
934 return -1;
935 }
936 sc->dv_audio_container = 1;
937 st->codec->codec_id = CODEC_ID_PCM_S16LE;
938 break;
939 #endif
940 /* no ifdef since parameters are always those */
941 case CODEC_ID_AMR_WB:
942 st->codec->sample_rate= 16000;
943 st->codec->channels= 1; /* really needed */
944 break;
945 case CODEC_ID_QCELP:
946 case CODEC_ID_AMR_NB:
947 st->codec->frame_size= sc->samples_per_frame;
948 st->codec->sample_rate= 8000;
949 st->codec->channels= 1; /* really needed */
950 break;
951 case CODEC_ID_MP2:
952 case CODEC_ID_MP3:
953 st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
954 st->need_parsing = AVSTREAM_PARSE_FULL;
955 break;
956 case CODEC_ID_GSM:
957 case CODEC_ID_ADPCM_MS:
958 case CODEC_ID_ADPCM_IMA_WAV:
959 st->codec->block_align = sc->bytes_per_frame;
960 break;
961 case CODEC_ID_ALAC:
962 if (st->codec->extradata_size == 36)
963 st->codec->frame_size = AV_RB32((st->codec->extradata+12));
964 break;
965 default:
966 break;
967 }
968
969 return 0;
970 }
971
mov_read_stsc(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)972 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
973 {
974 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
975 MOVStreamContext *sc = st->priv_data;
976 unsigned int i, entries;
977
978 get_byte(pb); /* version */
979 get_be24(pb); /* flags */
980
981 entries = get_be32(pb);
982
983 if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
984 return -1;
985
986 dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
987
988 sc->sample_to_chunk_sz = entries;
989 sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
990 if (!sc->sample_to_chunk)
991 return -1;
992 for(i=0; i<entries; i++) {
993 sc->sample_to_chunk[i].first = get_be32(pb);
994 sc->sample_to_chunk[i].count = get_be32(pb);
995 sc->sample_to_chunk[i].id = get_be32(pb);
996 }
997 return 0;
998 }
999
mov_read_stss(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1000 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1001 {
1002 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1003 MOVStreamContext *sc = st->priv_data;
1004 unsigned int i, entries;
1005
1006 get_byte(pb); /* version */
1007 get_be24(pb); /* flags */
1008
1009 entries = get_be32(pb);
1010
1011 if(entries >= UINT_MAX / sizeof(int))
1012 return -1;
1013
1014 sc->keyframe_count = entries;
1015
1016 dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1017
1018 sc->keyframes = av_malloc(entries * sizeof(int));
1019 if (!sc->keyframes)
1020 return -1;
1021 for(i=0; i<entries; i++) {
1022 sc->keyframes[i] = get_be32(pb);
1023 //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1024 }
1025 return 0;
1026 }
1027
mov_read_stsz(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1028 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1029 {
1030 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1031 MOVStreamContext *sc = st->priv_data;
1032 unsigned int i, entries, sample_size;
1033
1034 get_byte(pb); /* version */
1035 get_be24(pb); /* flags */
1036
1037 sample_size = get_be32(pb);
1038 if (!sc->sample_size) /* do not overwrite value computed in stsd */
1039 sc->sample_size = sample_size;
1040 entries = get_be32(pb);
1041 if(entries >= UINT_MAX / sizeof(int))
1042 return -1;
1043
1044 sc->sample_count = entries;
1045 if (sample_size)
1046 return 0;
1047
1048 dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1049
1050 sc->sample_sizes = av_malloc(entries * sizeof(int));
1051 if (!sc->sample_sizes)
1052 return -1;
1053 for(i=0; i<entries; i++)
1054 sc->sample_sizes[i] = get_be32(pb);
1055 return 0;
1056 }
1057
mov_read_stts(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1058 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1059 {
1060 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1061 MOVStreamContext *sc = st->priv_data;
1062 unsigned int i, entries;
1063 int64_t duration=0;
1064 int64_t total_sample_count=0;
1065
1066 get_byte(pb); /* version */
1067 get_be24(pb); /* flags */
1068 entries = get_be32(pb);
1069 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1070 return -1;
1071
1072 sc->stts_count = entries;
1073 sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1074 if (!sc->stts_data)
1075 return -1;
1076 dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1077
1078 sc->time_rate=0;
1079
1080 for(i=0; i<entries; i++) {
1081 int sample_duration;
1082 int sample_count;
1083
1084 sample_count=get_be32(pb);
1085 sample_duration = get_be32(pb);
1086 sc->stts_data[i].count= sample_count;
1087 sc->stts_data[i].duration= sample_duration;
1088
1089 sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1090
1091 dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1092
1093 duration+=(int64_t)sample_duration*sample_count;
1094 total_sample_count+=sample_count;
1095 }
1096
1097 st->nb_frames= total_sample_count;
1098 if(duration)
1099 st->duration= duration;
1100 return 0;
1101 }
1102
mov_read_ctts(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1103 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1104 {
1105 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1106 MOVStreamContext *sc = st->priv_data;
1107 unsigned int i, entries;
1108
1109 get_byte(pb); /* version */
1110 get_be24(pb); /* flags */
1111 entries = get_be32(pb);
1112 if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1113 return -1;
1114
1115 sc->ctts_count = entries;
1116 sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1117 if (!sc->ctts_data)
1118 return -1;
1119 dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1120
1121 for(i=0; i<entries; i++) {
1122 int count =get_be32(pb);
1123 int duration =get_be32(pb);
1124
1125 if (duration < 0) {
1126 av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1127 sc->ctts_count = 0;
1128 url_fskip(pb, 8 * (entries - i - 1));
1129 break;
1130 }
1131 sc->ctts_data[i].count = count;
1132 sc->ctts_data[i].duration= duration;
1133
1134 sc->time_rate= ff_gcd(sc->time_rate, duration);
1135 }
1136 return 0;
1137 }
1138
mov_build_index(MOVContext * mov,AVStream * st)1139 static void mov_build_index(MOVContext *mov, AVStream *st)
1140 {
1141 MOVStreamContext *sc = st->priv_data;
1142 offset_t current_offset;
1143 int64_t current_dts = 0;
1144 unsigned int stts_index = 0;
1145 unsigned int stsc_index = 0;
1146 unsigned int stss_index = 0;
1147 unsigned int i, j;
1148
1149 /* only use old uncompressed audio chunk demuxing when stts specifies it */
1150 if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1151 sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1152 unsigned int current_sample = 0;
1153 unsigned int stts_sample = 0;
1154 unsigned int keyframe, sample_size;
1155 unsigned int distance = 0;
1156 int key_off = sc->keyframes && sc->keyframes[0] == 1;
1157
1158 st->nb_frames = sc->sample_count;
1159 for (i = 0; i < sc->chunk_count; i++) {
1160 current_offset = sc->chunk_offsets[i];
1161 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1162 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1163 stsc_index++;
1164 for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1165 if (current_sample >= sc->sample_count) {
1166 av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1167 goto out;
1168 }
1169 keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1170 if (keyframe) {
1171 distance = 0;
1172 if (stss_index + 1 < sc->keyframe_count)
1173 stss_index++;
1174 }
1175 sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1176 dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1177 "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1178 current_offset, current_dts, sample_size, distance, keyframe);
1179 if(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 current_offset += sample_size;
1183 assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1184 current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1185 distance++;
1186 stts_sample++;
1187 current_sample++;
1188 if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1189 stts_sample = 0;
1190 stts_index++;
1191 }
1192 }
1193 }
1194 } else { /* read whole chunk */
1195 unsigned int chunk_samples, chunk_size, chunk_duration;
1196 unsigned int frames = 1;
1197 for (i = 0; i < sc->chunk_count; i++) {
1198 current_offset = sc->chunk_offsets[i];
1199 if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1200 i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1201 stsc_index++;
1202 chunk_samples = sc->sample_to_chunk[stsc_index].count;
1203 /* get chunk size, beware of alaw/ulaw/mace */
1204 if (sc->samples_per_frame > 0 &&
1205 (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1206 if (sc->samples_per_frame < 160)
1207 chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1208 else {
1209 chunk_size = sc->bytes_per_frame;
1210 frames = chunk_samples / sc->samples_per_frame;
1211 chunk_samples = sc->samples_per_frame;
1212 }
1213 } else
1214 chunk_size = chunk_samples * sc->sample_size;
1215 for (j = 0; j < frames; j++) {
1216 av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1217 /* get chunk duration */
1218 chunk_duration = 0;
1219 while (chunk_samples > 0) {
1220 if (chunk_samples < sc->stts_data[stts_index].count) {
1221 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1222 sc->stts_data[stts_index].count -= chunk_samples;
1223 break;
1224 } else {
1225 chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1226 chunk_samples -= sc->stts_data[stts_index].count;
1227 if (stts_index + 1 < sc->stts_count)
1228 stts_index++;
1229 }
1230 }
1231 current_offset += sc->bytes_per_frame;
1232 dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1233 "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1234 chunk_size, chunk_duration);
1235 assert(chunk_duration % sc->time_rate == 0);
1236 current_dts += chunk_duration / sc->time_rate;
1237 }
1238 }
1239 }
1240 out:
1241 /* adjust sample count to avindex entries */
1242 sc->sample_count = st->nb_index_entries;
1243 }
1244
mov_read_trak(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1245 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1246 {
1247 AVStream *st;
1248 MOVStreamContext *sc;
1249 int ret;
1250
1251 st = av_new_stream(c->fc, c->fc->nb_streams);
1252 if (!st) return AVERROR(ENOMEM);
1253 sc = av_mallocz(sizeof(MOVStreamContext));
1254 if (!sc) return AVERROR(ENOMEM);
1255
1256 st->priv_data = sc;
1257 st->codec->codec_type = CODEC_TYPE_DATA;
1258 st->start_time = 0; /* XXX: check */
1259
1260 if ((ret = mov_read_default(c, pb, atom)) < 0)
1261 return ret;
1262
1263 /* sanity checks */
1264 if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1265 (!sc->sample_size && !sc->sample_count))){
1266 av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1267 st->index);
1268 sc->sample_count = 0; //ignore track
1269 return 0;
1270 }
1271 if(!sc->time_rate)
1272 sc->time_rate=1;
1273 if(!sc->time_scale)
1274 sc->time_scale= c->time_scale;
1275 av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1276
1277 if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1278 !st->codec->frame_size && sc->stts_count == 1)
1279 st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1280
1281 if(st->duration != AV_NOPTS_VALUE){
1282 assert(st->duration % sc->time_rate == 0);
1283 st->duration /= sc->time_rate;
1284 }
1285 sc->ffindex = st->index;
1286 mov_build_index(c, st);
1287
1288 if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1289 if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1290 av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1291 st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1292 } else
1293 sc->pb = c->fc->pb;
1294
1295 switch (st->codec->codec_id) {
1296 #ifdef CONFIG_H261_DECODER
1297 case CODEC_ID_H261:
1298 #endif
1299 #ifdef CONFIG_H263_DECODER
1300 case CODEC_ID_H263:
1301 #endif
1302 #ifdef CONFIG_MPEG4_DECODER
1303 case CODEC_ID_MPEG4:
1304 #endif
1305 st->codec->width= 0; /* let decoder init width/height */
1306 st->codec->height= 0;
1307 break;
1308 #ifdef CONFIG_VORBIS_DECODER
1309 case CODEC_ID_VORBIS:
1310 #endif
1311 st->codec->sample_rate= 0; /* let decoder init parameters properly */
1312 break;
1313 }
1314
1315 /* Do not need those anymore. */
1316 av_freep(&sc->chunk_offsets);
1317 av_freep(&sc->sample_to_chunk);
1318 av_freep(&sc->sample_sizes);
1319 av_freep(&sc->keyframes);
1320 av_freep(&sc->stts_data);
1321
1322 return 0;
1323 }
1324
mov_parse_udta_string(ByteIOContext * pb,char * str,int size)1325 static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1326 {
1327 uint16_t str_size = get_be16(pb); /* string length */;
1328
1329 get_be16(pb); /* skip language */
1330 get_buffer(pb, str, FFMIN(size, str_size));
1331 }
1332
mov_read_udta(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1333 static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1334 {
1335 uint64_t end = url_ftell(pb) + atom.size;
1336
1337 while (url_ftell(pb) + 8 < end) {
1338 uint32_t tag_size = get_be32(pb);
1339 uint32_t tag = get_le32(pb);
1340 uint64_t next = url_ftell(pb) + tag_size - 8;
1341
1342 if (next > end) // stop if tag_size is wrong
1343 break;
1344
1345 switch (tag) {
1346 case MKTAG(0xa9,'n','a','m'):
1347 mov_parse_udta_string(pb, c->fc->title, sizeof(c->fc->title));
1348 break;
1349 case MKTAG(0xa9,'w','r','t'):
1350 mov_parse_udta_string(pb, c->fc->author, sizeof(c->fc->author));
1351 break;
1352 case MKTAG(0xa9,'c','p','y'):
1353 mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1354 break;
1355 case MKTAG(0xa9,'i','n','f'):
1356 mov_parse_udta_string(pb, c->fc->comment, sizeof(c->fc->comment));
1357 break;
1358 default:
1359 break;
1360 }
1361
1362 url_fseek(pb, next, SEEK_SET);
1363 }
1364
1365 return 0;
1366 }
1367
mov_read_tkhd(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1368 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1369 {
1370 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1371 int version = get_byte(pb);
1372
1373 get_be24(pb); /* flags */
1374 /*
1375 MOV_TRACK_ENABLED 0x0001
1376 MOV_TRACK_IN_MOVIE 0x0002
1377 MOV_TRACK_IN_PREVIEW 0x0004
1378 MOV_TRACK_IN_POSTER 0x0008
1379 */
1380
1381 if (version == 1) {
1382 get_be64(pb);
1383 get_be64(pb);
1384 } else {
1385 get_be32(pb); /* creation time */
1386 get_be32(pb); /* modification time */
1387 }
1388 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1389 get_be32(pb); /* reserved */
1390 st->start_time = 0; /* check */
1391 /* highlevel (considering edits) duration in movie timebase */
1392 (version == 1) ? get_be64(pb) : get_be32(pb);
1393 get_be32(pb); /* reserved */
1394 get_be32(pb); /* reserved */
1395
1396 get_be16(pb); /* layer */
1397 get_be16(pb); /* alternate group */
1398 get_be16(pb); /* volume */
1399 get_be16(pb); /* reserved */
1400
1401 url_fskip(pb, 36); /* display matrix */
1402
1403 /* those are fixed-point */
1404 get_be32(pb); /* track width */
1405 get_be32(pb); /* track height */
1406
1407 return 0;
1408 }
1409
mov_read_tfhd(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1410 static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1411 {
1412 MOVFragment *frag = &c->fragment;
1413 MOVTrackExt *trex = NULL;
1414 int flags, track_id, i;
1415
1416 get_byte(pb); /* version */
1417 flags = get_be24(pb);
1418
1419 track_id = get_be32(pb);
1420 if (!track_id || track_id > c->fc->nb_streams)
1421 return -1;
1422 frag->track_id = track_id;
1423 for (i = 0; i < c->trex_count; i++)
1424 if (c->trex_data[i].track_id == frag->track_id) {
1425 trex = &c->trex_data[i];
1426 break;
1427 }
1428 if (!trex) {
1429 av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1430 return -1;
1431 }
1432
1433 if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1434 else frag->base_data_offset = frag->moof_offset;
1435 if (flags & 0x02) frag->stsd_id = get_be32(pb);
1436 else frag->stsd_id = trex->stsd_id;
1437
1438 frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1439 frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
1440 frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
1441 dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1442 return 0;
1443 }
1444
mov_read_trex(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1445 static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1446 {
1447 MOVTrackExt *trex;
1448
1449 if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1450 return -1;
1451 c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1452 if (!c->trex_data)
1453 return AVERROR(ENOMEM);
1454 trex = &c->trex_data[c->trex_count++];
1455 get_byte(pb); /* version */
1456 get_be24(pb); /* flags */
1457 trex->track_id = get_be32(pb);
1458 trex->stsd_id = get_be32(pb);
1459 trex->duration = get_be32(pb);
1460 trex->size = get_be32(pb);
1461 trex->flags = get_be32(pb);
1462 return 0;
1463 }
1464
mov_read_trun(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1465 static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1466 {
1467 MOVFragment *frag = &c->fragment;
1468 AVStream *st;
1469 MOVStreamContext *sc;
1470 uint64_t offset;
1471 int64_t dts;
1472 int data_offset = 0;
1473 unsigned entries, first_sample_flags = frag->flags;
1474 int flags, distance, i;
1475
1476 if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1477 return -1;
1478 st = c->fc->streams[frag->track_id-1];
1479 sc = st->priv_data;
1480 if (sc->pseudo_stream_id+1 != frag->stsd_id)
1481 return 0;
1482 get_byte(pb); /* version */
1483 flags = get_be24(pb);
1484 entries = get_be32(pb);
1485 dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1486 if (flags & 0x001) data_offset = get_be32(pb);
1487 if (flags & 0x004) first_sample_flags = get_be32(pb);
1488 if (flags & 0x800) {
1489 if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1490 return -1;
1491 sc->ctts_data = av_realloc(sc->ctts_data,
1492 (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1493 if (!sc->ctts_data)
1494 return AVERROR(ENOMEM);
1495 }
1496 dts = st->duration;
1497 offset = frag->base_data_offset + data_offset;
1498 distance = 0;
1499 dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1500 for (i = 0; i < entries; i++) {
1501 unsigned sample_size = frag->size;
1502 int sample_flags = i ? frag->flags : first_sample_flags;
1503 unsigned sample_duration = frag->duration;
1504 int keyframe;
1505
1506 if (flags & 0x100) sample_duration = get_be32(pb);
1507 if (flags & 0x200) sample_size = get_be32(pb);
1508 if (flags & 0x400) sample_flags = get_be32(pb);
1509 if (flags & 0x800) {
1510 sc->ctts_data[sc->ctts_count].count = 1;
1511 sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1512 sc->ctts_count++;
1513 }
1514 if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1515 (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1516 distance = 0;
1517 av_add_index_entry(st, offset, dts, sample_size, distance,
1518 keyframe ? AVINDEX_KEYFRAME : 0);
1519 dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1520 "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1521 offset, dts, sample_size, distance, keyframe);
1522 distance++;
1523 assert(sample_duration % sc->time_rate == 0);
1524 dts += sample_duration / sc->time_rate;
1525 offset += sample_size;
1526 }
1527 frag->moof_offset = offset;
1528 sc->sample_count = st->nb_index_entries;
1529 st->duration = dts;
1530 return 0;
1531 }
1532
1533 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1534 /* like the files created with Adobe Premiere 5.0, for samples see */
1535 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
mov_read_wide(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1536 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1537 {
1538 int err;
1539
1540 if (atom.size < 8)
1541 return 0; /* continue */
1542 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1543 url_fskip(pb, atom.size - 4);
1544 return 0;
1545 }
1546 atom.type = get_le32(pb);
1547 atom.offset += 8;
1548 atom.size -= 8;
1549 if (atom.type != MKTAG('m','d','a','t')) {
1550 url_fskip(pb, atom.size);
1551 return 0;
1552 }
1553 err = mov_read_mdat(c, pb, atom);
1554 return err;
1555 }
1556
mov_read_cmov(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1557 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1558 {
1559 #ifdef CONFIG_ZLIB
1560 ByteIOContext ctx;
1561 uint8_t *cmov_data;
1562 uint8_t *moov_data; /* uncompressed data */
1563 long cmov_len, moov_len;
1564 int ret;
1565
1566 get_be32(pb); /* dcom atom */
1567 if (get_le32(pb) != MKTAG('d','c','o','m'))
1568 return -1;
1569 if (get_le32(pb) != MKTAG('z','l','i','b')) {
1570 av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1571 return -1;
1572 }
1573 get_be32(pb); /* cmvd atom */
1574 if (get_le32(pb) != MKTAG('c','m','v','d'))
1575 return -1;
1576 moov_len = get_be32(pb); /* uncompressed size */
1577 cmov_len = atom.size - 6 * 4;
1578
1579 cmov_data = av_malloc(cmov_len);
1580 if (!cmov_data)
1581 return -1;
1582 moov_data = av_malloc(moov_len);
1583 if (!moov_data) {
1584 av_free(cmov_data);
1585 return -1;
1586 }
1587 get_buffer(pb, cmov_data, cmov_len);
1588 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1589 return -1;
1590 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1591 return -1;
1592 atom.type = MKTAG('m','o','o','v');
1593 atom.offset = 0;
1594 atom.size = moov_len;
1595 #ifdef DEBUG
1596 // { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1597 #endif
1598 ret = mov_read_default(c, &ctx, atom);
1599 av_free(moov_data);
1600 av_free(cmov_data);
1601 return ret;
1602 #else
1603 av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1604 return -1;
1605 #endif
1606 }
1607
1608 /* edit list atom */
mov_read_elst(MOVContext * c,ByteIOContext * pb,MOV_atom_t atom)1609 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1610 {
1611 MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1612 int i, edit_count;
1613
1614 get_byte(pb); /* version */
1615 get_be24(pb); /* flags */
1616 edit_count= sc->edit_count = get_be32(pb); /* entries */
1617
1618 for(i=0; i<edit_count; i++){
1619 int time;
1620 get_be32(pb); /* Track duration */
1621 time = get_be32(pb); /* Media time */
1622 get_be32(pb); /* Media rate */
1623 if (time != 0)
1624 av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1625 "a/v desync might occur, patch welcome\n");
1626 }
1627 dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1628 return 0;
1629 }
1630
1631 static const MOVParseTableEntry mov_default_parse_table[] = {
1632 { MKTAG('c','o','6','4'), mov_read_stco },
1633 { MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1634 { MKTAG('d','i','n','f'), mov_read_default },
1635 { MKTAG('d','r','e','f'), mov_read_dref },
1636 { MKTAG('e','d','t','s'), mov_read_default },
1637 { MKTAG('e','l','s','t'), mov_read_elst },
1638 { MKTAG('e','n','d','a'), mov_read_enda },
1639 { MKTAG('f','i','e','l'), mov_read_extradata },
1640 { MKTAG('f','t','y','p'), mov_read_ftyp },
1641 { MKTAG('g','l','b','l'), mov_read_glbl },
1642 { MKTAG('h','d','l','r'), mov_read_hdlr },
1643 { MKTAG('j','p','2','h'), mov_read_extradata },
1644 { MKTAG('m','d','a','t'), mov_read_mdat },
1645 { MKTAG('m','d','h','d'), mov_read_mdhd },
1646 { MKTAG('m','d','i','a'), mov_read_default },
1647 { MKTAG('m','i','n','f'), mov_read_default },
1648 { MKTAG('m','o','o','f'), mov_read_moof },
1649 { MKTAG('m','o','o','v'), mov_read_moov },
1650 { MKTAG('m','v','e','x'), mov_read_default },
1651 { MKTAG('m','v','h','d'), mov_read_mvhd },
1652 { MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1653 { MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1654 { MKTAG('a','v','c','C'), mov_read_glbl },
1655 { MKTAG('s','t','b','l'), mov_read_default },
1656 { MKTAG('s','t','c','o'), mov_read_stco },
1657 { MKTAG('s','t','s','c'), mov_read_stsc },
1658 { MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1659 { MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1660 { MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1661 { MKTAG('s','t','t','s'), mov_read_stts },
1662 { MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1663 { MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1664 { MKTAG('t','r','a','k'), mov_read_trak },
1665 { MKTAG('t','r','a','f'), mov_read_default },
1666 { MKTAG('t','r','e','x'), mov_read_trex },
1667 { MKTAG('t','r','u','n'), mov_read_trun },
1668 { MKTAG('u','d','t','a'), mov_read_udta },
1669 { MKTAG('w','a','v','e'), mov_read_wave },
1670 { MKTAG('e','s','d','s'), mov_read_esds },
1671 { MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1672 { MKTAG('c','m','o','v'), mov_read_cmov },
1673 { 0, NULL }
1674 };
1675
mov_probe(AVProbeData * p)1676 static int mov_probe(AVProbeData *p)
1677 {
1678 unsigned int offset;
1679 uint32_t tag;
1680 int score = 0;
1681
1682 /* check file header */
1683 offset = 0;
1684 for(;;) {
1685 /* ignore invalid offset */
1686 if ((offset + 8) > (unsigned int)p->buf_size)
1687 return score;
1688 tag = AV_RL32(p->buf + offset + 4);
1689 switch(tag) {
1690 /* check for obvious tags */
1691 case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1692 case MKTAG('m','o','o','v'):
1693 case MKTAG('m','d','a','t'):
1694 case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1695 case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1696 return AVPROBE_SCORE_MAX;
1697 /* those are more common words, so rate then a bit less */
1698 case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1699 case MKTAG('w','i','d','e'):
1700 case MKTAG('f','r','e','e'):
1701 case MKTAG('j','u','n','k'):
1702 case MKTAG('p','i','c','t'):
1703 return AVPROBE_SCORE_MAX - 5;
1704 case MKTAG(0x82,0x82,0x7f,0x7d ):
1705 case MKTAG('f','t','y','p'):
1706 case MKTAG('s','k','i','p'):
1707 case MKTAG('u','u','i','d'):
1708 case MKTAG('p','r','f','l'):
1709 offset = AV_RB32(p->buf+offset) + offset;
1710 /* if we only find those cause probedata is too small at least rate them */
1711 score = AVPROBE_SCORE_MAX - 50;
1712 break;
1713 default:
1714 /* unrecognized tag */
1715 return score;
1716 }
1717 }
1718 return score;
1719 }
1720
mov_read_header(AVFormatContext * s,AVFormatParameters * ap)1721 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1722 {
1723 MOVContext *mov = s->priv_data;
1724 ByteIOContext *pb = s->pb;
1725 int err;
1726 MOV_atom_t atom = { 0, 0, 0 };
1727
1728 mov->fc = s;
1729 /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1730 if(!url_is_streamed(pb))
1731 atom.size = url_fsize(pb);
1732 else
1733 atom.size = INT64_MAX;
1734
1735 /* check MOV header */
1736 if ((err = mov_read_default(mov, pb, atom)) < 0) {
1737 av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1738 return err;
1739 }
1740 if (!mov->found_moov) {
1741 av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1742 return -1;
1743 }
1744 dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1745
1746 return 0;
1747 }
1748
mov_read_packet(AVFormatContext * s,AVPacket * pkt)1749 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1750 {
1751 MOVContext *mov = s->priv_data;
1752 MOVStreamContext *sc = 0;
1753 AVIndexEntry *sample = 0;
1754 int64_t best_dts = INT64_MAX;
1755 int i;
1756 retry:
1757 for (i = 0; i < s->nb_streams; i++) {
1758 AVStream *st = s->streams[i];
1759 MOVStreamContext *msc = st->priv_data;
1760 if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1761 AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1762 int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1763 AV_TIME_BASE, msc->time_scale);
1764 dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1765 if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1766 (!url_is_streamed(s->pb) &&
1767 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1768 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1769 (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1770 sample = current_sample;
1771 best_dts = dts;
1772 sc = msc;
1773 }
1774 }
1775 }
1776 if (!sample) {
1777 mov->found_mdat = 0;
1778 if (!url_is_streamed(s->pb) ||
1779 mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1780 url_feof(s->pb))
1781 return -1;
1782 dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1783 goto retry;
1784 }
1785 /* must be done just before reading, to avoid infinite loop on sample */
1786 sc->current_sample++;
1787 if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1788 av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1789 sc->ffindex, sample->pos);
1790 return -1;
1791 }
1792 av_get_packet(sc->pb, pkt, sample->size);
1793 #ifdef CONFIG_DV_DEMUXER
1794 if (mov->dv_demux && sc->dv_audio_container) {
1795 dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1796 av_free(pkt->data);
1797 pkt->size = 0;
1798 if (dv_get_packet(mov->dv_demux, pkt) < 0)
1799 return -1;
1800 }
1801 #endif
1802 pkt->stream_index = sc->ffindex;
1803 pkt->dts = sample->timestamp;
1804 if (sc->ctts_data) {
1805 assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1806 pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1807 /* update ctts context */
1808 sc->sample_to_ctime_sample++;
1809 if (sc->sample_to_ctime_index < sc->ctts_count &&
1810 sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1811 sc->sample_to_ctime_index++;
1812 sc->sample_to_ctime_sample = 0;
1813 }
1814 } else {
1815 AVStream *st = s->streams[sc->ffindex];
1816 int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1817 st->index_entries[sc->current_sample].timestamp : st->duration;
1818 pkt->duration = next_dts - pkt->dts;
1819 pkt->pts = pkt->dts;
1820 }
1821 pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1822 pkt->pos = sample->pos;
1823 dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1824 pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1825 return 0;
1826 }
1827
mov_seek_stream(AVStream * st,int64_t timestamp,int flags)1828 static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1829 {
1830 MOVStreamContext *sc = st->priv_data;
1831 int sample, time_sample;
1832 int i;
1833
1834 sample = av_index_search_timestamp(st, timestamp, flags);
1835 dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1836 if (sample < 0) /* not sure what to do */
1837 return -1;
1838 sc->current_sample = sample;
1839 dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1840 /* adjust ctts index */
1841 if (sc->ctts_data) {
1842 time_sample = 0;
1843 for (i = 0; i < sc->ctts_count; i++) {
1844 int next = time_sample + sc->ctts_data[i].count;
1845 if (next > sc->current_sample) {
1846 sc->sample_to_ctime_index = i;
1847 sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1848 break;
1849 }
1850 time_sample = next;
1851 }
1852 }
1853 return sample;
1854 }
1855
mov_read_seek(AVFormatContext * s,int stream_index,int64_t sample_time,int flags)1856 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1857 {
1858 AVStream *st;
1859 int64_t seek_timestamp, timestamp;
1860 int sample;
1861 int i;
1862
1863 if (stream_index >= s->nb_streams)
1864 return -1;
1865
1866 st = s->streams[stream_index];
1867 sample = mov_seek_stream(st, sample_time, flags);
1868 if (sample < 0)
1869 return -1;
1870
1871 /* adjust seek timestamp to found sample timestamp */
1872 seek_timestamp = st->index_entries[sample].timestamp;
1873
1874 for (i = 0; i < s->nb_streams; i++) {
1875 st = s->streams[i];
1876 if (stream_index == i || st->discard == AVDISCARD_ALL)
1877 continue;
1878
1879 timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1880 mov_seek_stream(st, timestamp, flags);
1881 }
1882 return 0;
1883 }
1884
mov_read_close(AVFormatContext * s)1885 static int mov_read_close(AVFormatContext *s)
1886 {
1887 int i, j;
1888 MOVContext *mov = s->priv_data;
1889 for(i=0; i<s->nb_streams; i++) {
1890 MOVStreamContext *sc = s->streams[i]->priv_data;
1891 av_freep(&sc->ctts_data);
1892 for (j=0; j<sc->drefs_count; j++)
1893 av_freep(&sc->drefs[j].path);
1894 av_freep(&sc->drefs);
1895 if (sc->pb && sc->pb != s->pb)
1896 url_fclose(sc->pb);
1897 }
1898 if(mov->dv_demux){
1899 for(i=0; i<mov->dv_fctx->nb_streams; i++){
1900 av_freep(&mov->dv_fctx->streams[i]->codec);
1901 av_freep(&mov->dv_fctx->streams[i]);
1902 }
1903 av_freep(&mov->dv_fctx);
1904 av_freep(&mov->dv_demux);
1905 }
1906 av_freep(&mov->trex_data);
1907 return 0;
1908 }
1909
1910 AVInputFormat mov_demuxer = {
1911 "mov,mp4,m4a,3gp,3g2,mj2",
1912 "QuickTime/MPEG4/Motion JPEG 2000 format",
1913 sizeof(MOVContext),
1914 mov_probe,
1915 mov_read_header,
1916 mov_read_packet,
1917 mov_read_close,
1918 mov_read_seek,
1919 };
1920