c0d9cec5651e640a338f5c93409aa0c19ba4ecef
[libav.git] / libavformat / mov.c
1 /*
2 * MOV decoder.
3 * Copyright (c) 2001 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <limits.h>
21
22 #include "avformat.h"
23 #include "avi.h"
24
25 #ifdef CONFIG_ZLIB
26 #include <zlib.h>
27 #endif
28
29 /*
30 * First version by Francois Revol revol@free.fr
31 * Seek function by Gael Chardon gael.dev@4now.net
32 *
33 * Features and limitations:
34 * - reads most of the QT files I have (at least the structure),
35 * the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement.
36 * FIXED, Francois Revol, 07/17/2002
37 * - ffmpeg has nearly none of the usual QuickTime codecs,
38 * although I succesfully dumped raw and mp3 audio tracks off .mov files.
39 * Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
40 * - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes
41 * (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at
42 * http://mpeg.telecomitalialab.com/faq.htm
43 * - the code is quite ugly... maybe I won't do it recursive next time :-)
44 * - seek is not supported with files that contain edit list
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 //#define DEBUG
58 #ifdef DEBUG
59 #include <stdio.h>
60 #include <fcntl.h>
61 #endif
62
63 #include "qtpalette.h"
64
65
66 /* Allows seeking (MOV_SPLIT_CHUNKS should also be defined) */
67 #define MOV_SEEK
68
69 /* allows chunk splitting - should work now... */
70 /* in case you can't read a file, try commenting */
71 #define MOV_SPLIT_CHUNKS
72
73 /* Special handling for movies created with Minolta Dimaxe Xi*/
74 /* this fix should not interfere with other .mov files, but just in case*/
75 #define MOV_MINOLTA_FIX
76
77 /* some streams in QT (and in MP4 mostly) aren't either video nor audio */
78 /* so we first list them as this, then clean up the list of streams we give back, */
79 /* getting rid of these */
80 #define CODEC_TYPE_MOV_OTHER (enum CodecType) 2
81
82 static const CodecTag mov_video_tags[] = {
83 /* { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */
84 /* { CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, *//* Uncompressed RGB */
85 /* { CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */
86 /* { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, *//* YUV with alpha-channel (AVID Uncompressed) */
87 /* Graphics */
88 /* Animation */
89 /* Apple video */
90 /* Kodak Photo CD */
91 { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
92 { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
93 { CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
94 { CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
95 { CODEC_ID_MJPEG, MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
96 /* { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
97 /* { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, *//* embedded gif files as frames (usually one "click to play movie" frame) */
98 /* Sorenson video */
99 { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
100 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
101 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
102 { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
103 { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
104 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
105 { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
106 /* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
107 { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
108 { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
109 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
110 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
111 /* { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */
112 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
113 { CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
114 { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
115 { CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
116 { CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
117 { CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
118 { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
119 { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
120 { CODEC_ID_NONE, 0 },
121 };
122
123 static const CodecTag mov_audio_tags[] = {
124 /* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */
125 { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
126 /* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */
127 { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
128 { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
129 { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
130 { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
131 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
132 { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
133 { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
134
135 { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
136 { CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */
137 { CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */
138 /* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
139 /* MP4 tags */
140 { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
141 /* The standard for mpeg4 audio is still not normalised AFAIK anyway */
142 { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
143 { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
144 { CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */
145 { CODEC_ID_ALAC,MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
146 { CODEC_ID_NONE, 0 },
147 };
148
149 /* the QuickTime file format is quite convoluted...
150 * it has lots of index tables, each indexing something in another one...
151 * Here we just use what is needed to read the chunks
152 */
153
154 typedef struct MOV_sample_to_chunk_tbl {
155 long first;
156 long count;
157 long id;
158 } MOV_sample_to_chunk_tbl;
159
160 typedef struct {
161 uint32_t type;
162 int64_t offset;
163 int64_t size; /* total size (excluding the size and type fields) */
164 } MOV_atom_t;
165
166 typedef struct {
167 int seed;
168 int flags;
169 int size;
170 void* clrs;
171 } MOV_ctab_t;
172
173 typedef struct {
174 uint8_t version;
175 uint32_t flags; // 24bit
176
177 /* 0x03 ESDescrTag */
178 uint16_t es_id;
179 #define MP4ODescrTag 0x01
180 #define MP4IODescrTag 0x02
181 #define MP4ESDescrTag 0x03
182 #define MP4DecConfigDescrTag 0x04
183 #define MP4DecSpecificDescrTag 0x05
184 #define MP4SLConfigDescrTag 0x06
185 #define MP4ContentIdDescrTag 0x07
186 #define MP4SupplContentIdDescrTag 0x08
187 #define MP4IPIPtrDescrTag 0x09
188 #define MP4IPMPPtrDescrTag 0x0A
189 #define MP4IPMPDescrTag 0x0B
190 #define MP4RegistrationDescrTag 0x0D
191 #define MP4ESIDIncDescrTag 0x0E
192 #define MP4ESIDRefDescrTag 0x0F
193 #define MP4FileIODescrTag 0x10
194 #define MP4FileODescrTag 0x11
195 #define MP4ExtProfileLevelDescrTag 0x13
196 #define MP4ExtDescrTagsStart 0x80
197 #define MP4ExtDescrTagsEnd 0xFE
198 uint8_t stream_priority;
199
200 /* 0x04 DecConfigDescrTag */
201 uint8_t object_type_id;
202 uint8_t stream_type;
203 /* XXX: really streamType is
204 * only 6bit, followed by:
205 * 1bit upStream
206 * 1bit reserved
207 */
208 uint32_t buffer_size_db; // 24
209 uint32_t max_bitrate;
210 uint32_t avg_bitrate;
211
212 /* 0x05 DecSpecificDescrTag */
213 uint8_t decoder_cfg_len;
214 uint8_t *decoder_cfg;
215
216 /* 0x06 SLConfigDescrTag */
217 uint8_t sl_config_len;
218 uint8_t *sl_config;
219 } MOV_esds_t;
220
221 struct MOVParseTableEntry;
222
223 typedef struct Time2Sample{
224 int count;
225 int duration;
226 }Time2Sample;
227
228 typedef struct MOVStreamContext {
229 int ffindex; /* the ffmpeg stream id */
230 int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */
231 long next_chunk;
232 long chunk_count;
233 int64_t *chunk_offsets;
234 int stts_count;
235 Time2Sample *stts_data;
236 int ctts_count;
237 Time2Sample *ctts_data;
238 int edit_count; /* number of 'edit' (elst atom) */
239 long sample_to_chunk_sz;
240 MOV_sample_to_chunk_tbl *sample_to_chunk;
241 long sample_to_chunk_index;
242 int sample_to_time_index;
243 long sample_to_time_sample;
244 uint64_t sample_to_time_time;
245 int sample_to_ctime_index;
246 int sample_to_ctime_sample;
247 long sample_size;
248 long sample_count;
249 long *sample_sizes;
250 long keyframe_count;
251 long *keyframes;
252 int time_scale;
253 long current_sample;
254 long left_in_chunk; /* how many samples before next chunk */
255 /* specific MPEG4 header which is added at the beginning of the stream */
256 unsigned int header_len;
257 uint8_t *header_data;
258 MOV_esds_t esds;
259 } MOVStreamContext;
260
261 typedef struct MOVContext {
262 int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */
263 AVFormatContext *fc;
264 int time_scale;
265 int duration; /* duration of the longest track */
266 int found_moov; /* when both 'moov' and 'mdat' sections has been found */
267 int found_mdat; /* we suppose we have enough data to read the file */
268 int64_t mdat_size;
269 int64_t mdat_offset;
270 int total_streams;
271 /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
272 * but we need the info to be able to skip data from those streams in the 'mdat' section
273 */
274 MOVStreamContext *streams[MAX_STREAMS];
275
276 int64_t next_chunk_offset;
277 MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */
278 int ctab_size;
279 MOV_ctab_t **ctab; /* color tables */
280 const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
281 /* NOTE: for recursion save to/ restore from local variable! */
282
283 AVPaletteControl palette_control;
284 } MOVContext;
285
286
287 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
288
289 /* those functions parse an atom */
290 /* return code:
291 1: found what I wanted, exit
292 0: continue to parse next atom
293 -1: error occured, exit
294 */
295 typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
296
297 /* links atom IDs to parse functions */
298 typedef struct MOVParseTableEntry {
299 uint32_t type;
300 mov_parse_function func;
301 } MOVParseTableEntry;
302
303 #ifdef DEBUG
304 /*
305 * XXX: static sux, even more in a multithreaded environment...
306 * Avoid them. This is here just to help debugging.
307 */
308 static int debug_indent = 0;
309 void print_atom(const char *str, MOV_atom_t atom)
310 {
311 unsigned int tag, i;
312 tag = (unsigned int) atom.type;
313 i=debug_indent;
314 if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
315 while(i--)
316 av_log(NULL, AV_LOG_DEBUG, "|");
317 av_log(NULL, AV_LOG_DEBUG, "parse:");
318 av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",
319 str, tag & 0xff,
320 (tag >> 8) & 0xff,
321 (tag >> 16) & 0xff,
322 (tag >> 24) & 0xff,
323 (unsigned int)atom.offset,
324 (unsigned int)atom.size);
325 assert((unsigned int)atom.size < 0x7fffffff);// catching errors
326 }
327 #else
328 #define print_atom(a,b)
329 #endif
330
331
332 static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
333 {
334 print_atom("leaf", atom);
335
336 if (atom.size>1)
337 url_fskip(pb, atom.size);
338 /* url_seek(pb, atom_offset+atom.size, SEEK_SET); */
339 return 0;
340 }
341
342 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
343 {
344 int64_t total_size = 0;
345 MOV_atom_t a;
346 int i;
347 int err = 0;
348
349 #ifdef DEBUG
350 print_atom("default", atom);
351 debug_indent++;
352 #endif
353
354 a.offset = atom.offset;
355
356 if (atom.size < 0)
357 atom.size = 0x7fffffffffffffffLL;
358 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
359 a.size = atom.size;
360 a.type=0L;
361 if(atom.size >= 8) {
362 a.size = get_be32(pb);
363 a.type = get_le32(pb);
364 }
365 total_size += 8;
366 a.offset += 8;
367 //av_log(NULL, AV_LOG_DEBUG, "type: %08x %.4s sz: %Lx %Lx %Lx\n", type, (char*)&type, size, atom.size, total_size);
368 if (a.size == 1) { /* 64 bit extended size */
369 a.size = get_be64(pb) - 8;
370 a.offset += 8;
371 total_size += 8;
372 }
373 if (a.size == 0) {
374 a.size = atom.size - total_size;
375 if (a.size <= 8)
376 break;
377 }
378 for (i = 0; c->parse_table[i].type != 0L
379 && c->parse_table[i].type != a.type; i++)
380 /* empty */;
381
382 a.size -= 8;
383
384 if(a.size < 0)
385 break;
386
387 // av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);
388 if (c->parse_table[i].type == 0) { /* skip leaf atoms data */
389 // url_seek(pb, atom.offset+atom.size, SEEK_SET);
390 #ifdef DEBUG
391 print_atom("unknown", a);
392 #endif
393 url_fskip(pb, a.size);
394 } else {
395 #ifdef DEBUG
396 //char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
397 //print_atom(b, type, offset, size);
398 #endif
399 err = (c->parse_table[i].func)(c, pb, a);
400 }
401
402 a.offset += a.size;
403 total_size += a.size;
404 }
405
406 if (!err && total_size < atom.size && atom.size < 0x7ffff) {
407 //av_log(NULL, AV_LOG_DEBUG, "RESET %Ld %Ld err:%d\n", atom.size, total_size, err);
408 url_fskip(pb, atom.size - total_size);
409 }
410
411 #ifdef DEBUG
412 debug_indent--;
413 #endif
414 return err;
415 }
416
417 static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
418 {
419 #if 1
420 url_fskip(pb, atom.size); // for now
421 #else
422 VERY VERY BROKEN, NEVER execute this, needs rewrite
423 unsigned int len;
424 MOV_ctab_t *t;
425 c->ctab = av_realloc(c->ctab, ++c->ctab_size);
426 t = c->ctab[c->ctab_size];
427 t->seed = get_be32(pb);
428 t->flags = get_be16(pb);
429 t->size = get_be16(pb) + 1;
430 len = 2 * t->size * 4;
431 if (len > 0) {
432 t->clrs = av_malloc(len); // 16bit A R G B
433 if (t->clrs)
434 get_buffer(pb, t->clrs, len);
435 }
436 #endif
437
438 return 0;
439 }
440
441 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
442 {
443 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
444 int len = 0;
445 uint32_t type;
446 uint32_t ctype;
447
448 print_atom("hdlr", atom);
449
450 get_byte(pb); /* version */
451 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
452
453 /* component type */
454 ctype = get_le32(pb);
455 type = get_le32(pb); /* component subtype */
456
457 #ifdef DEBUG
458 av_log(NULL, AV_LOG_DEBUG, "ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype);
459 av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
460 #endif
461 #ifdef DEBUG
462 /* XXX: yeah this is ugly... */
463 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
464 if(type == MKTAG('v', 'i', 'd', 'e'))
465 puts("hdlr: vide");
466 else if(type == MKTAG('s', 'o', 'u', 'n'))
467 puts("hdlr: soun");
468 } else if(ctype == 0) { /* MP4 */
469 if(type == MKTAG('v', 'i', 'd', 'e'))
470 puts("hdlr: vide");
471 else if(type == MKTAG('s', 'o', 'u', 'n'))
472 puts("hdlr: soun");
473 else if(type == MKTAG('o', 'd', 's', 'm'))
474 puts("hdlr: odsm");
475 else if(type == MKTAG('s', 'd', 's', 'm'))
476 puts("hdlr: sdsm");
477 } else puts("hdlr: meta");
478 #endif
479
480 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
481 /* helps parsing the string hereafter... */
482 c->mp4 = 0;
483 if(type == MKTAG('v', 'i', 'd', 'e'))
484 st->codec.codec_type = CODEC_TYPE_VIDEO;
485 else if(type == MKTAG('s', 'o', 'u', 'n'))
486 st->codec.codec_type = CODEC_TYPE_AUDIO;
487 } else if(ctype == 0) { /* MP4 */
488 /* helps parsing the string hereafter... */
489 c->mp4 = 1;
490 if(type == MKTAG('v', 'i', 'd', 'e'))
491 st->codec.codec_type = CODEC_TYPE_VIDEO;
492 else if(type == MKTAG('s', 'o', 'u', 'n'))
493 st->codec.codec_type = CODEC_TYPE_AUDIO;
494 }
495 get_be32(pb); /* component manufacture */
496 get_be32(pb); /* component flags */
497 get_be32(pb); /* component flags mask */
498
499 if(atom.size <= 24)
500 return 0; /* nothing left to read */
501 /* XXX: MP4 uses a C string, not a pascal one */
502 /* component name */
503
504 if(c->mp4) {
505 /* .mp4: C string */
506 while(get_byte(pb) && (++len < (atom.size - 24)));
507 } else {
508 /* .mov: PASCAL string */
509 #ifdef DEBUG
510 char* buf;
511 #endif
512 len = get_byte(pb);
513 #ifdef DEBUG
514 buf = (uint8_t*) av_malloc(len+1);
515 if (buf) {
516 get_buffer(pb, buf, len);
517 buf[len] = '\0';
518 av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf);
519 av_free(buf);
520 } else
521 #endif
522 url_fskip(pb, len);
523 }
524
525 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
526 return 0;
527 }
528
529 static int mov_mp4_read_descr_len(ByteIOContext *pb)
530 {
531 int len = 0;
532 int count = 4;
533 while (count--) {
534 int c = get_byte(pb);
535 len = (len << 7) | (c & 0x7f);
536 if (!(c & 0x80))
537 break;
538 }
539 return len;
540 }
541
542 static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)
543 {
544 int len;
545 *tag = get_byte(pb);
546 len = mov_mp4_read_descr_len(pb);
547 #ifdef DEBUG
548 av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
549 #endif
550 return len;
551 }
552
553 static inline unsigned int get_be24(ByteIOContext *s)
554 {
555 unsigned int val;
556 val = get_byte(s) << 16;
557 val |= get_byte(s) << 8;
558 val |= get_byte(s);
559 return val;
560 }
561
562 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
563 {
564 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
565 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
566 int64_t start_pos = url_ftell(pb);
567 int tag, len;
568
569 print_atom("esds", atom);
570
571 /* Well, broken but suffisant for some MP4 streams */
572 get_be32(pb); /* version + flags */
573 len = mov_mp4_read_descr(pb, &tag);
574 if (tag == MP4ESDescrTag) {
575 get_be16(pb); /* ID */
576 get_byte(pb); /* priority */
577 } else
578 get_be16(pb); /* ID */
579
580 len = mov_mp4_read_descr(pb, &tag);
581 if (tag == MP4DecConfigDescrTag) {
582 sc->esds.object_type_id = get_byte(pb);
583 sc->esds.stream_type = get_byte(pb);
584 sc->esds.buffer_size_db = get_be24(pb);
585 sc->esds.max_bitrate = get_be32(pb);
586 sc->esds.avg_bitrate = get_be32(pb);
587
588 len = mov_mp4_read_descr(pb, &tag);
589 //av_log(NULL, AV_LOG_DEBUG, "LEN %d TAG %d m:%d a:%d\n", len, tag, sc->esds.max_bitrate, sc->esds.avg_bitrate);
590 if (tag == MP4DecSpecificDescrTag) {
591 #ifdef DEBUG
592 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
593 #endif
594 st->codec.extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
595 if (st->codec.extradata) {
596 get_buffer(pb, st->codec.extradata, len);
597 st->codec.extradata_size = len;
598 }
599 }
600 }
601 /* in any case, skip garbage */
602 url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
603 return 0;
604 }
605
606 /* this atom contains actual media data */
607 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
608 {
609 print_atom("mdat", atom);
610
611 if(atom.size == 0) /* wrong one (MP4) */
612 return 0;
613 c->found_mdat=1;
614 c->mdat_offset = atom.offset;
615 c->mdat_size = atom.size;
616 if(c->found_moov)
617 return 1; /* found both, just go */
618 url_fskip(pb, atom.size);
619 return 0; /* now go for moov */
620 }
621
622 /* this atom should contain all header atoms */
623 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
624 {
625 int err;
626
627 print_atom("moov", atom);
628
629 err = mov_read_default(c, pb, atom);
630 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
631 /* so we don't parse the whole file if over a network */
632 c->found_moov=1;
633 if(c->found_mdat)
634 return 1; /* found both, just go */
635 return 0; /* now go for mdat */
636 }
637
638
639 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
640 {
641 print_atom("mdhd", atom);
642
643 get_byte(pb); /* version */
644
645 get_byte(pb); get_byte(pb);
646 get_byte(pb); /* flags */
647
648 get_be32(pb); /* creation time */
649 get_be32(pb); /* modification time */
650
651 c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
652
653 #ifdef DEBUG
654 av_log(NULL, AV_LOG_DEBUG, "track[%i].time_scale = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->time_scale); /* time scale */
655 #endif
656 get_be32(pb); /* duration */
657
658 get_be16(pb); /* language */
659 get_be16(pb); /* quality */
660
661 return 0;
662 }
663
664 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
665 {
666 print_atom("mvhd", atom);
667
668 get_byte(pb); /* version */
669 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
670
671 get_be32(pb); /* creation time */
672 get_be32(pb); /* modification time */
673 c->time_scale = get_be32(pb); /* time scale */
674 #ifdef DEBUG
675 av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);
676 #endif
677 c->duration = get_be32(pb); /* duration */
678 get_be32(pb); /* preferred scale */
679
680 get_be16(pb); /* preferred volume */
681
682 url_fskip(pb, 10); /* reserved */
683
684 url_fskip(pb, 36); /* display matrix */
685
686 get_be32(pb); /* preview time */
687 get_be32(pb); /* preview duration */
688 get_be32(pb); /* poster time */
689 get_be32(pb); /* selection time */
690 get_be32(pb); /* selection duration */
691 get_be32(pb); /* current time */
692 get_be32(pb); /* next track ID */
693
694 return 0;
695 }
696
697 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
698 {
699 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
700
701 if((uint64_t)atom.size > (1<<30))
702 return -1;
703
704 // currently SVQ3 decoder expect full STSD header - so let's fake it
705 // this should be fixed and just SMI header should be passed
706 av_free(st->codec.extradata);
707 st->codec.extradata_size = 0x5a + atom.size;
708 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
709
710 if (st->codec.extradata) {
711 strcpy(st->codec.extradata, "SVQ3"); // fake
712 get_buffer(pb, st->codec.extradata + 0x5a, atom.size);
713 //av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld %s\n", atom.size, (char*)st->codec.extradata + 0x5a);
714 } else
715 url_fskip(pb, atom.size);
716
717 return 0;
718 }
719
720 static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
721 {
722 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
723
724 if((uint64_t)atom.size > (1<<30))
725 return -1;
726
727 av_free(st->codec.extradata);
728
729 st->codec.extradata_size = atom.size;
730 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
731
732 if (st->codec.extradata) {
733 get_buffer(pb, st->codec.extradata, atom.size);
734 } else
735 url_fskip(pb, atom.size);
736
737 return 0;
738 }
739
740 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
741 {
742 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
743 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
744 unsigned int i, entries;
745
746 print_atom("stco", atom);
747
748 get_byte(pb); /* version */
749 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
750
751 entries = get_be32(pb);
752
753 if(entries >= UINT_MAX/sizeof(int64_t))
754 return -1;
755
756 sc->chunk_count = entries;
757 sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));
758 if (!sc->chunk_offsets)
759 return -1;
760 if (atom.type == MKTAG('s', 't', 'c', 'o')) {
761 for(i=0; i<entries; i++) {
762 sc->chunk_offsets[i] = get_be32(pb);
763 }
764 } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
765 for(i=0; i<entries; i++) {
766 sc->chunk_offsets[i] = get_be64(pb);
767 }
768 } else
769 return -1;
770 #ifdef DEBUG
771 /*
772 for(i=0; i<entries; i++) {
773 av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
774 }
775 */
776 #endif
777 return 0;
778 }
779
780 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
781 {
782 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
783 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
784 int entries, frames_per_sample;
785 uint32_t format;
786 uint8_t codec_name[32];
787
788 /* for palette traversal */
789 int color_depth;
790 int color_start;
791 int color_count;
792 int color_end;
793 int color_index;
794 int color_dec;
795 int color_greyscale;
796 unsigned char *color_table;
797 int j;
798 unsigned char r, g, b;
799
800 print_atom("stsd", atom);
801
802 get_byte(pb); /* version */
803 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
804
805 entries = get_be32(pb);
806
807 while(entries--) { //Parsing Sample description table
808 enum CodecID id;
809 int size = get_be32(pb); /* size */
810 format = get_le32(pb); /* data format */
811
812 get_be32(pb); /* reserved */
813 get_be16(pb); /* reserved */
814 get_be16(pb); /* index */
815
816 /* for MPEG4: set codec type by looking for it */
817 id = codec_get_id(mov_video_tags, format);
818 if (id >= 0) {
819 AVCodec *codec;
820 codec = avcodec_find_decoder(id);
821 if (codec)
822 st->codec.codec_type = codec->type;
823 }
824 #ifdef DEBUG
825 av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n",
826 size,
827 (format >> 0) & 0xff,
828 (format >> 8) & 0xff,
829 (format >> 16) & 0xff,
830 (format >> 24) & 0xff,
831 st->codec.codec_type);
832 #endif
833 st->codec.codec_tag = format;
834 if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
835 MOV_atom_t a = { 0, 0, 0 };
836 st->codec.codec_id = id;
837 get_be16(pb); /* version */
838 get_be16(pb); /* revision level */
839 get_be32(pb); /* vendor */
840 get_be32(pb); /* temporal quality */
841 get_be32(pb); /* spacial quality */
842 st->codec.width = get_be16(pb); /* width */
843 st->codec.height = get_be16(pb); /* height */
844 #if 1
845 if (st->codec.codec_id == CODEC_ID_MPEG4) {
846 /* in some MPEG4 the width/height are not correct, so
847 we ignore this info */
848 st->codec.width = 0;
849 st->codec.height = 0;
850 }
851 #endif
852 get_be32(pb); /* horiz resolution */
853 get_be32(pb); /* vert resolution */
854 get_be32(pb); /* data size, always 0 */
855 frames_per_sample = get_be16(pb); /* frames per samples */
856 #ifdef DEBUG
857 av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);
858 #endif
859 get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
860 if (codec_name[0] <= 31) {
861 memcpy(st->codec.codec_name, &codec_name[1],codec_name[0]);
862 st->codec.codec_name[codec_name[0]] = 0;
863 }
864
865 st->codec.bits_per_sample = get_be16(pb); /* depth */
866 st->codec.color_table_id = get_be16(pb); /* colortable id */
867
868 /* These are set in mov_read_stts and might already be set!
869 st->codec.frame_rate = 25;
870 st->codec.frame_rate_base = 1;
871 */
872 size -= (16+8*4+2+32+2*2);
873 #if 0
874 while (size >= 8) {
875 MOV_atom_t a;
876 int64_t start_pos;
877
878 a.size = get_be32(pb);
879 a.type = get_le32(pb);
880 size -= 8;
881 #ifdef DEBUG
882 av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",
883 (a.type >> 0) & 0xff,
884 (a.type >> 8) & 0xff,
885 (a.type >> 16) & 0xff,
886 (a.type >> 24) & 0xff,
887 a.size, size);
888 #endif
889 start_pos = url_ftell(pb);
890
891 switch(a.type) {
892 case MKTAG('e', 's', 'd', 's'):
893 {
894 int tag, len;
895 /* Well, broken but suffisant for some MP4 streams */
896 get_be32(pb); /* version + flags */
897 len = mov_mp4_read_descr(pb, &tag);
898 if (tag == 0x03) {
899 /* MP4ESDescrTag */
900 get_be16(pb); /* ID */
901 get_byte(pb); /* priority */
902 len = mov_mp4_read_descr(pb, &tag);
903 if (tag != 0x04)
904 goto fail;
905 /* MP4DecConfigDescrTag */
906 get_byte(pb); /* objectTypeId */
907 get_be32(pb); /* streamType + buffer size */
908 get_be32(pb); /* max bit rate */
909 get_be32(pb); /* avg bit rate */
910 len = mov_mp4_read_descr(pb, &tag);
911 if (tag != 0x05)
912 goto fail;
913 /* MP4DecSpecificDescrTag */
914 #ifdef DEBUG
915 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
916 #endif
917 sc->header_data = av_mallocz(len);
918 if (sc->header_data) {
919 get_buffer(pb, sc->header_data, len);
920 sc->header_len = len;
921 }
922 }
923 /* in any case, skip garbage */
924 }
925 break;
926 default:
927 break;
928 }
929 fail:
930 av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld %d\n", atom.size, url_ftell(pb) - start_pos);
931 if (atom.size > 8) {
932 url_fskip(pb, (atom.size - 8) -
933 ((url_ftell(pb) - start_pos)));
934 size -= atom.size - 8;
935 }
936 }
937 if (size > 0) {
938 /* unknown extension */
939 url_fskip(pb, size);
940 }
941 #else
942
943 /* figure out the palette situation */
944 color_depth = st->codec.bits_per_sample & 0x1F;
945 color_greyscale = st->codec.bits_per_sample & 0x20;
946
947 /* if the depth is 2, 4, or 8 bpp, file is palettized */
948 if ((color_depth == 2) || (color_depth == 4) ||
949 (color_depth == 8)) {
950
951 if (color_greyscale) {
952
953 /* compute the greyscale palette */
954 color_count = 1 << color_depth;
955 color_index = 255;
956 color_dec = 256 / (color_count - 1);
957 for (j = 0; j < color_count; j++) {
958 r = g = b = color_index;
959 c->palette_control.palette[j] =
960 (r << 16) | (g << 8) | (b);
961 color_index -= color_dec;
962 if (color_index < 0)
963 color_index = 0;
964 }
965
966 } else if (st->codec.color_table_id & 0x08) {
967
968 /* if flag bit 3 is set, use the default palette */
969 color_count = 1 << color_depth;
970 if (color_depth == 2)
971 color_table = ff_qt_default_palette_4;
972 else if (color_depth == 4)
973 color_table = ff_qt_default_palette_16;
974 else
975 color_table = ff_qt_default_palette_256;
976
977 for (j = 0; j < color_count; j++) {
978 r = color_table[j * 4 + 0];
979 g = color_table[j * 4 + 1];
980 b = color_table[j * 4 + 2];
981 c->palette_control.palette[j] =
982 (r << 16) | (g << 8) | (b);
983 }
984
985 } else {
986
987 /* load the palette from the file */
988 color_start = get_be32(pb);
989 color_count = get_be16(pb);
990 color_end = get_be16(pb);
991 for (j = color_start; j <= color_end; j++) {
992 /* each R, G, or B component is 16 bits;
993 * only use the top 8 bits; skip alpha bytes
994 * up front */
995 get_byte(pb);
996 get_byte(pb);
997 r = get_byte(pb);
998 get_byte(pb);
999 g = get_byte(pb);
1000 get_byte(pb);
1001 b = get_byte(pb);
1002 get_byte(pb);
1003 c->palette_control.palette[j] =
1004 (r << 16) | (g << 8) | (b);
1005 }
1006 }
1007
1008 st->codec.palctrl = &c->palette_control;
1009 st->codec.palctrl->palette_changed = 1;
1010 } else
1011 st->codec.palctrl = NULL;
1012
1013 a.size = size;
1014 mov_read_default(c, pb, a);
1015 #endif
1016 } else {
1017 st->codec.codec_id = codec_get_id(mov_audio_tags, format);
1018 if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244
1019 {
1020 #ifdef DEBUG
1021 av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");
1022 #endif
1023 get_be32(pb);get_be32(pb); //Reserved_8
1024 get_be16(pb);//Reserved_2
1025 get_be16(pb);//Reserved_2
1026 get_be32(pb);//Reserved_4
1027 get_be16(pb);//TimeScale
1028 get_be16(pb);//Reserved_2
1029
1030 //AMRSpecificBox.(10 bytes)
1031
1032 get_be32(pb); //size
1033 get_be32(pb); //type=='damr'
1034 get_be32(pb); //vendor
1035 get_byte(pb); //decoder version
1036 get_be16(pb); //mode_set
1037 get_byte(pb); //mode_change_period
1038 get_byte(pb); //frames_per_sample
1039
1040 st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames
1041 if(st->codec.codec_id==CODEC_ID_AMR_NB)
1042 {
1043 st->codec.sample_rate=8000;
1044 st->codec.channels=1;
1045 }
1046 else //AMR-WB
1047 {
1048 st->codec.sample_rate=16000;
1049 st->codec.channels=1;
1050 }
1051 st->codec.bits_per_sample=16;
1052 st->codec.bit_rate=0; /*It is not possible to tell this before we have
1053 an audio frame and even then every frame can be different*/
1054 }
1055 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))
1056 {
1057 //This is some stuff for the hint track, lets ignore it!
1058 //Do some mp4 auto detect.
1059 c->mp4=1;
1060 size-=(16);
1061 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
1062 }
1063 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))
1064 {
1065 MOV_atom_t a;
1066 int mp4_version;
1067
1068 /* Handle mp4 audio tag */
1069 mp4_version=get_be16(pb);/*version*/
1070 get_be16(pb); /*revesion*/
1071 get_be32(pb);
1072 st->codec.channels = get_be16(pb); /* channels */
1073 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */
1074 get_be32(pb);
1075 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */
1076 get_be16(pb);
1077 c->mp4=1;
1078
1079 if(mp4_version==1)
1080 {
1081 url_fskip(pb,16);
1082 a.size=size-(16+20+16);
1083 }
1084 else
1085 a.size=size-(16+20);
1086
1087 a.offset=url_ftell(pb);
1088
1089 mov_read_default(c, pb, a);
1090
1091 /* Get correct sample rate from extradata */
1092 if(st->codec.extradata_size) {
1093 const int samplerate_table[] = {
1094 96000, 88200, 64000, 48000, 44100, 32000,
1095 24000, 22050, 16000, 12000, 11025, 8000,
1096 7350, 0, 0, 0
1097 };
1098 unsigned char *px = st->codec.extradata;
1099 // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels
1100 int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);
1101 st->codec.sample_rate = samplerate_table[samplerate_index];
1102 st->codec.channels = (px[1] >> 3) & 15;
1103 }
1104 }
1105 else if( st->codec.codec_tag == MKTAG( 'a', 'l', 'a', 'c' ))
1106 {
1107 /* Handle alac audio tag + special extradata */
1108 get_be32(pb); /* version */
1109 get_be32(pb);
1110 st->codec.channels = get_be16(pb); /* channels */
1111 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */
1112 get_be32(pb);
1113 st->codec.sample_rate = get_be16(pb);
1114 get_be16(pb);
1115
1116 /* fetch the 36-byte extradata needed for alac decoding */
1117 st->codec.extradata_size = 36;
1118 st->codec.extradata = (uint8_t*)
1119 av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1120 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
1121 }
1122 else if(size>=(16+20))
1123 {//16 bytes read, reading atleast 20 more
1124 uint16_t version;
1125 #ifdef DEBUG
1126 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);
1127 #endif
1128 version = get_be16(pb); /* version */
1129 get_be16(pb); /* revision level */
1130 get_be32(pb); /* vendor */
1131
1132 st->codec.channels = get_be16(pb); /* channel count */
1133 st->codec.bits_per_sample = get_be16(pb); /* sample size */
1134
1135 /* handle specific s8 codec */
1136 get_be16(pb); /* compression id = 0*/
1137 get_be16(pb); /* packet size = 0 */
1138
1139 st->codec.sample_rate = ((get_be32(pb) >> 16));
1140 //av_log(NULL, AV_LOG_DEBUG, "CODECID %d %d %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
1141
1142 switch (st->codec.codec_id) {
1143 case CODEC_ID_PCM_S16BE:
1144 if (st->codec.bits_per_sample == 8)
1145 st->codec.codec_id = CODEC_ID_PCM_S8;
1146 /* fall */
1147 case CODEC_ID_PCM_U8:
1148 st->codec.bit_rate = st->codec.sample_rate * 8;
1149 break;
1150 default:
1151 ;
1152 }
1153
1154 //Read QT version 1 fields. In version 0 theese dont exist
1155 #ifdef DEBUG
1156 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);
1157 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));
1158 #endif
1159 if((version==1) && size>=(16+20+16))
1160 {
1161 get_be32(pb); /* samples per packet */
1162 get_be32(pb); /* bytes per packet */
1163 get_be32(pb); /* bytes per frame */
1164 get_be32(pb); /* bytes per sample */
1165 if(size>(16+20+16))
1166 {
1167 //Optional, additional atom-based fields
1168 MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
1169 #ifdef DEBUG
1170 av_log(NULL, AV_LOG_DEBUG, "offest=0x%X, sizeleft=%d=0x%x,format=%c%c%c%c\n",(int)url_ftell(pb),size - (16 + 20 + 16 ),size - (16 + 20 + 16 ),
1171 (format >> 0) & 0xff,
1172 (format >> 8) & 0xff,
1173 (format >> 16) & 0xff,
1174 (format >> 24) & 0xff);
1175 #endif
1176 mov_read_default(c, pb, a);
1177 }
1178 }
1179 else
1180 {
1181 //We should be down to 0 bytes here, but lets make sure.
1182 size-=(16+20);
1183 #ifdef DEBUG
1184 if(size>0)
1185 av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));
1186 #endif
1187 url_fskip(pb, size);
1188 }
1189 }
1190 else
1191 {
1192 size-=16;
1193 //Unknown size, but lets do our best and skip the rest.
1194 #ifdef DEBUG
1195 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);
1196 #endif
1197 url_fskip(pb, size);
1198 }
1199 }
1200 }
1201
1202 return 0;
1203 }
1204
1205 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1206 {
1207 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1208 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1209 unsigned int i, entries;
1210
1211 print_atom("stsc", atom);
1212
1213 get_byte(pb); /* version */
1214 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1215
1216 entries = get_be32(pb);
1217
1218 if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))
1219 return -1;
1220
1221 #ifdef DEBUG
1222 av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1223 #endif
1224 sc->sample_to_chunk_sz = entries;
1225 sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
1226 if (!sc->sample_to_chunk)
1227 return -1;
1228 for(i=0; i<entries; i++) {
1229 sc->sample_to_chunk[i].first = get_be32(pb);
1230 sc->sample_to_chunk[i].count = get_be32(pb);
1231 sc->sample_to_chunk[i].id = get_be32(pb);
1232 #ifdef DEBUG
1233 /* av_log(NULL, AV_LOG_DEBUG, "sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id); */
1234 #endif
1235 }
1236 return 0;
1237 }
1238
1239 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1240 {
1241 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1242 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1243 unsigned int i, entries;
1244
1245 print_atom("stss", atom);
1246
1247 get_byte(pb); /* version */
1248 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1249
1250 entries = get_be32(pb);
1251
1252 if(entries >= UINT_MAX / sizeof(long))
1253 return -1;
1254
1255 sc->keyframe_count = entries;
1256 #ifdef DEBUG
1257 av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);
1258 #endif
1259 sc->keyframes = (long*) av_malloc(entries * sizeof(long));
1260 if (!sc->keyframes)
1261 return -1;
1262 for(i=0; i<entries; i++) {
1263 sc->keyframes[i] = get_be32(pb);
1264 #ifdef DEBUG
1265 /* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
1266 #endif
1267 }
1268 return 0;
1269 }
1270
1271 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1272 {
1273 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1274 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1275 unsigned int i, entries;
1276
1277 print_atom("stsz", atom);
1278
1279 get_byte(pb); /* version */
1280 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1281
1282 sc->sample_size = get_be32(pb);
1283 entries = get_be32(pb);
1284 if(entries >= UINT_MAX / sizeof(long))
1285 return -1;
1286
1287 sc->sample_count = entries;
1288 #ifdef DEBUG
1289 av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
1290 #endif
1291 if(sc->sample_size)
1292 return 0; /* there isn't any table following */
1293 sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));
1294 if (!sc->sample_sizes)
1295 return -1;
1296 for(i=0; i<entries; i++) {
1297 sc->sample_sizes[i] = get_be32(pb);
1298 #ifdef DEBUG
1299 av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);
1300 #endif
1301 }
1302 return 0;
1303 }
1304
1305 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1306 {
1307 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1308 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1309 unsigned int i, entries;
1310 int64_t duration=0;
1311 int64_t total_sample_count=0;
1312
1313 print_atom("stts", atom);
1314
1315 get_byte(pb); /* version */
1316 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1317 entries = get_be32(pb);
1318 if(entries >= UINT_MAX / sizeof(Time2Sample))
1319 return -1;
1320
1321 c->streams[c->fc->nb_streams-1]->stts_count = entries;
1322 c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));
1323
1324 #ifdef DEBUG
1325 av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1326 #endif
1327 for(i=0; i<entries; i++) {
1328 int sample_duration;
1329 int sample_count;
1330
1331 sample_count=get_be32(pb);
1332 sample_duration = get_be32(pb);
1333 c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;
1334 c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;
1335 #ifdef DEBUG
1336 av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1337 #endif
1338 duration+=sample_duration*sample_count;
1339 total_sample_count+=sample_count;
1340
1341 #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone
1342
1343 if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {
1344 st->codec.frame_rate_base = sample_duration ? sample_duration : 1;
1345 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1346 #ifdef DEBUG
1347 av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);
1348 #endif
1349 }
1350 #endif
1351 }
1352
1353 /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/
1354 if(duration>0)
1355 {
1356 av_reduce(
1357 &st->codec.frame_rate,
1358 &st->codec.frame_rate_base,
1359 c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,
1360 duration,
1361 INT_MAX
1362 );
1363
1364 #ifdef DEBUG
1365 av_log(NULL, AV_LOG_DEBUG, "FRAME RATE average (video or audio)= %f (tot sample count= %i ,tot dur= %i timescale=%d)\n", (float)st->codec.frame_rate/st->codec.frame_rate_base,total_sample_count,duration,c->streams[c->fc->nb_streams-1]->time_scale);
1366 #endif
1367 }
1368 else
1369 {
1370 st->codec.frame_rate_base = 1;
1371 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1372 }
1373 return 0;
1374 }
1375
1376 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1377 {
1378 // AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1379 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1380 unsigned int i, entries;
1381
1382 print_atom("ctts", atom);
1383
1384 get_byte(pb); /* version */
1385 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1386 entries = get_be32(pb);
1387 if(entries >= UINT_MAX / sizeof(Time2Sample))
1388 return -1;
1389
1390 c->streams[c->fc->nb_streams-1]->ctts_count = entries;
1391 c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));
1392
1393 // #ifdef DEBUG
1394 av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1395 // #endif
1396 for(i=0; i<entries; i++) {
1397 c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);
1398 c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);
1399 }
1400 return 0;
1401 }
1402
1403 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1404 {
1405 AVStream *st;
1406 MOVStreamContext *sc;
1407
1408 print_atom("trak", atom);
1409
1410 st = av_new_stream(c->fc, c->fc->nb_streams);
1411 if (!st) return -2;
1412 sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
1413 if (!sc) {
1414 av_free(st);
1415 return -1;
1416 }
1417
1418 sc->sample_to_chunk_index = -1;
1419 st->priv_data = sc;
1420 st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
1421 st->start_time = 0; /* XXX: check */
1422 st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;
1423 c->streams[c->fc->nb_streams-1] = sc;
1424
1425 return mov_read_default(c, pb, atom);
1426 }
1427
1428 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1429 {
1430 AVStream *st;
1431
1432 print_atom("tkhd", atom);
1433
1434 st = c->fc->streams[c->fc->nb_streams-1];
1435
1436 get_byte(pb); /* version */
1437
1438 get_byte(pb); get_byte(pb);
1439 get_byte(pb); /* flags */
1440 /*
1441 MOV_TRACK_ENABLED 0x0001
1442 MOV_TRACK_IN_MOVIE 0x0002
1443 MOV_TRACK_IN_PREVIEW 0x0004
1444 MOV_TRACK_IN_POSTER 0x0008
1445 */
1446
1447 get_be32(pb); /* creation time */
1448 get_be32(pb); /* modification time */
1449 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1450 get_be32(pb); /* reserved */
1451 st->start_time = 0; /* check */
1452 st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */
1453 get_be32(pb); /* reserved */
1454 get_be32(pb); /* reserved */
1455
1456 get_be16(pb); /* layer */
1457 get_be16(pb); /* alternate group */
1458 get_be16(pb); /* volume */
1459 get_be16(pb); /* reserved */
1460
1461 url_fskip(pb, 36); /* display matrix */
1462
1463 /* those are fixed-point */
1464 st->codec.width = get_be32(pb) >> 16; /* track width */
1465 st->codec.height = get_be32(pb) >> 16; /* track height */
1466
1467 return 0;
1468 }
1469
1470 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1471 /* like the files created with Adobe Premiere 5.0, for samples see */
1472 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1473 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1474 {
1475 int err;
1476
1477 #ifdef DEBUG
1478 print_atom("wide", atom);
1479 debug_indent++;
1480 #endif
1481 if (atom.size < 8)
1482 return 0; /* continue */
1483 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1484 url_fskip(pb, atom.size - 4);
1485 return 0;
1486 }
1487 atom.type = get_le32(pb);
1488 atom.offset += 8;
1489 atom.size -= 8;
1490 if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1491 url_fskip(pb, atom.size);
1492 return 0;
1493 }
1494 err = mov_read_mdat(c, pb, atom);
1495 #ifdef DEBUG
1496 debug_indent--;
1497 #endif
1498 return err;
1499 }
1500
1501
1502 #ifdef CONFIG_ZLIB
1503 static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
1504 {
1505 return -1;
1506 }
1507
1508 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1509 {
1510 ByteIOContext ctx;
1511 uint8_t *cmov_data;
1512 uint8_t *moov_data; /* uncompressed data */
1513 long cmov_len, moov_len;
1514 int ret;
1515
1516 print_atom("cmov", atom);
1517
1518 get_be32(pb); /* dcom atom */
1519 if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1520 return -1;
1521 if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1522 av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");
1523 return -1;
1524 }
1525 get_be32(pb); /* cmvd atom */
1526 if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1527 return -1;
1528 moov_len = get_be32(pb); /* uncompressed size */
1529 cmov_len = atom.size - 6 * 4;
1530
1531 cmov_data = (uint8_t *) av_malloc(cmov_len);
1532 if (!cmov_data)
1533 return -1;
1534 moov_data = (uint8_t *) av_malloc(moov_len);
1535 if (!moov_data) {
1536 av_free(cmov_data);
1537 return -1;
1538 }
1539 get_buffer(pb, cmov_data, cmov_len);
1540 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1541 return -1;
1542 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)
1543 return -1;
1544 ctx.buf_end = ctx.buffer + moov_len;
1545 atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1546 atom.offset = 0;
1547 atom.size = moov_len;
1548 #ifdef DEBUG
1549 { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1550 #endif
1551 ret = mov_read_default(c, &ctx, atom);
1552 av_free(moov_data);
1553 av_free(cmov_data);
1554
1555 return ret;
1556 }
1557 #endif
1558
1559 /* edit list atom */
1560 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1561 {
1562 int i, edit_count;
1563 print_atom("elst", atom);
1564
1565 get_byte(pb); /* version */
1566 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1567 edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */
1568
1569 for(i=0; i<edit_count; i++){
1570 get_be32(pb); /* Track duration */
1571 get_be32(pb); /* Media time */
1572 get_be32(pb); /* Media rate */
1573 }
1574 #ifdef DEBUG
1575 av_log(NULL, AV_LOG_DEBUG, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count);
1576 #endif
1577 return 0;
1578 }
1579
1580 static const MOVParseTableEntry mov_default_parse_table[] = {
1581 /* mp4 atoms */
1582 { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1583 { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
1584 { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
1585 { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1586 { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
1587 { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
1588 { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
1589 { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1590 { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1591 { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
1592 { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1593 { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
1594 { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
1595 { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
1596 { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1597 { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1598 { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1599 { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1600 { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1601 { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
1602 { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
1603 { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
1604 { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
1605 { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1606 { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
1607 { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
1608 { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
1609 { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
1610 { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
1611 { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1612 { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },
1613 { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1614 { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1615 { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
1616 { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1617 { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1618 { MKTAG( 's', 't', 's', 'h' ), mov_read_default },
1619 { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1620 { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1621 { MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1622 { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1623 { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1624 { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
1625 { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
1626 { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
1627 { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
1628 { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },
1629 { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
1630 { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },
1631 /* extra mp4 */
1632 { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
1633 /* QT atoms */
1634 { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
1635 { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
1636 { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
1637 { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
1638 { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1639 { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
1640 { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
1641 { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
1642 { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
1643 { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
1644 { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
1645 { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
1646 { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
1647 { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
1648 { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
1649 { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1650 //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
1651 #ifdef CONFIG_ZLIB
1652 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1653 #else
1654 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
1655 #endif
1656 { 0L, mov_read_leaf }
1657 };
1658
1659 static void mov_free_stream_context(MOVStreamContext *sc)
1660 {
1661 if(sc) {
1662 av_freep(&sc->chunk_offsets);
1663 av_freep(&sc->sample_to_chunk);
1664 av_freep(&sc->sample_sizes);
1665 av_freep(&sc->keyframes);
1666 av_freep(&sc->header_data);
1667 av_freep(&sc->stts_data);
1668 av_freep(&sc->ctts_data);
1669 av_freep(&sc);
1670 }
1671 }
1672
1673 static inline uint32_t mov_to_tag(uint8_t *buf)
1674 {
1675 return MKTAG(buf[0], buf[1], buf[2], buf[3]);
1676 }
1677
1678 static inline uint32_t to_be32(uint8_t *buf)
1679 {
1680 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
1681 }
1682
1683 /* XXX: is it sufficient ? */
1684 static int mov_probe(AVProbeData *p)
1685 {
1686 unsigned int offset;
1687 uint32_t tag;
1688 int score = 0;
1689
1690 /* check file header */
1691 if (p->buf_size <= 12)
1692 return 0;
1693 offset = 0;
1694 for(;;) {
1695 /* ignore invalid offset */
1696 if ((offset + 8) > (unsigned int)p->buf_size)
1697 return score;
1698 tag = mov_to_tag(p->buf + offset + 4);
1699 switch(tag) {
1700 /* check for obvious tags */
1701 case MKTAG( 'm', 'o', 'o', 'v' ):
1702 case MKTAG( 'm', 'd', 'a', 't' ):
1703 case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1704 case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1705 return AVPROBE_SCORE_MAX;
1706 /* those are more common words, so rate then a bit less */
1707 case MKTAG( 'w', 'i', 'd', 'e' ):
1708 case MKTAG( 'f', 'r', 'e', 'e' ):
1709 case MKTAG( 'j', 'u', 'n', 'k' ):
1710 case MKTAG( 'p', 'i', 'c', 't' ):
1711 return AVPROBE_SCORE_MAX - 5;
1712 case MKTAG( 'f', 't', 'y', 'p' ):
1713 case MKTAG( 's', 'k', 'i', 'p' ):
1714 offset = to_be32(p->buf+offset) + offset;
1715 /* if we only find those cause probedata is too small at least rate them */
1716 score = AVPROBE_SCORE_MAX - 50;
1717 break;
1718 default:
1719 /* unrecognized tag */
1720 return score;
1721 }
1722 }
1723 return score;
1724 }
1725
1726 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1727 {
1728 MOVContext *mov = (MOVContext *) s->priv_data;
1729 ByteIOContext *pb = &s->pb;
1730 int i, j, nb, err;
1731 MOV_atom_t atom = { 0, 0, 0 };
1732
1733 mov->fc = s;
1734 mov->parse_table = mov_default_parse_table;
1735 #if 0
1736 /* XXX: I think we should auto detect */
1737 if(s->iformat->name[1] == 'p')
1738 mov->mp4 = 1;
1739 #endif
1740 if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1741 atom.size = url_filesize(url_fileno(pb));
1742 else
1743 atom.size = 0x7FFFFFFFFFFFFFFFLL;
1744
1745 #ifdef DEBUG
1746 av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);
1747 #endif
1748
1749 /* check MOV header */
1750 err = mov_read_default(mov, pb, atom);
1751 if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1752 av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",
1753 err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1754 return -1;
1755 }
1756 #ifdef DEBUG
1757 av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1758 #endif
1759 /* some cleanup : make sure we are on the mdat atom */
1760 if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
1761 url_fseek(pb, mov->mdat_offset, SEEK_SET);
1762
1763 mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
1764
1765 #ifdef DEBUG
1766 av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));
1767 #endif
1768
1769 #ifdef DEBUG
1770 av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);
1771 #endif
1772 mov->total_streams = nb = s->nb_streams;
1773
1774 #if 1
1775 for(i=0; i<s->nb_streams;) {
1776 if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
1777 av_free(s->streams[i]);
1778 for(j=i+1; j<s->nb_streams; j++)
1779 s->streams[j-1] = s->streams[j];
1780 s->nb_streams--;
1781 } else
1782 i++;
1783 }
1784 for(i=0; i<s->nb_streams;i++) {
1785 MOVStreamContext *sc;
1786 sc = (MOVStreamContext *)s->streams[i]->priv_data;
1787 sc->ffindex = i;
1788 sc->is_ff_stream = 1;
1789 }
1790 #endif
1791 #ifdef DEBUG
1792 av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);
1793 #endif
1794 return 0;
1795 }
1796
1797 /* Yes, this is ugly... I didn't write the specs of QT :p */
1798 /* XXX:remove useless commented code sometime */
1799 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1800 {
1801 MOVContext *mov = (MOVContext *) s->priv_data;
1802 MOVStreamContext *sc;
1803 int64_t offset = 0x0FFFFFFFFFFFFFFFLL;
1804 int i, a, b, m;
1805 int size;
1806 int idx;
1807 size = 0x0FFFFFFF;
1808
1809 #ifdef MOV_SPLIT_CHUNKS
1810 if (mov->partial) {
1811 sc = mov->partial;
1812 idx = sc->sample_to_chunk_index;
1813
1814 if (idx < 0) return 0;
1815 #ifdef DEBUG
1816 fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);
1817 #endif
1818 // sample_size is not always correct for audio. Quicktime ignores this value and
1819 // computes it differently.
1820 if(s->streams[sc->ffindex]->codec.codec_type == CODEC_TYPE_VIDEO)
1821 size = sc->sample_size?sc->sample_size:sc->sample_sizes[sc->current_sample];
1822 sc->current_sample++;
1823 sc->left_in_chunk--;
1824
1825 if (sc->left_in_chunk <= 0)
1826 mov->partial = 0;
1827 offset = mov->next_chunk_offset;
1828 /* extract the sample */
1829
1830 goto readchunk;
1831 }
1832 #endif
1833
1834 again:
1835 sc = 0;
1836 for(i=0; i<mov->total_streams; i++) {
1837 MOVStreamContext *msc = mov->streams[i];
1838 //av_log(NULL, AV_LOG_DEBUG, "MOCHUNK %ld %d %p pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));
1839 if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0
1840 && (msc->chunk_offsets[msc->next_chunk] < offset)) {
1841 sc = msc;
1842 offset = msc->chunk_offsets[msc->next_chunk];
1843 //av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
1844 }
1845 }
1846 if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)
1847 return -1;
1848
1849 sc->next_chunk++;
1850
1851 if(mov->next_chunk_offset < offset) { /* some meta data */
1852 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1853 mov->next_chunk_offset = offset;
1854 }
1855
1856 //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
1857 if(!sc->is_ff_stream || s->streams[sc->ffindex]->discard) {
1858 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1859 mov->next_chunk_offset = offset;
1860 offset = 0x0FFFFFFFFFFFFFFFLL;
1861 goto again;
1862 }
1863
1864 /* now get the chunk size... */
1865
1866 for(i=0; i<mov->total_streams; i++) {
1867 MOVStreamContext *msc = mov->streams[i];
1868 if ((msc->next_chunk < msc->chunk_count)
1869 && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))
1870 size = msc->chunk_offsets[msc->next_chunk] - offset;
1871 }
1872
1873 #ifdef MOV_MINOLTA_FIX
1874 //Make sure that size is according to sample_size (Needed by .mov files
1875 //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
1876 //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
1877 //but I have no such movies
1878 if (sc->sample_size > 0) {
1879 int foundsize=0;
1880 for(i=0; i<(sc->sample_to_chunk_sz); i++) {
1881 if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )
1882 {
1883 // I can't figure out why for PCM audio sample_size is always 1
1884 // (it should actually be channels*bits_per_second/8) but it is.
1885 AVCodecContext* cod = &s->streams[sc->ffindex]->codec;
1886 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))
1887 foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
1888 else
1889 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;
1890 }
1891 #ifdef DEBUG
1892 av_log(NULL, AV_LOG_DEBUG, "sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id);
1893 #endif
1894 }
1895 if( (foundsize>0) && (foundsize<size) )
1896 {
1897 #ifdef DEBUG
1898 /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/
1899 #endif
1900 size=foundsize;
1901 }
1902 }
1903 #endif //MOV_MINOLTA_FIX
1904
1905 #ifdef MOV_SPLIT_CHUNKS
1906 /* split chunks into samples */
1907 if (s->streams[sc->ffindex]->codec.codec_type == CODEC_TYPE_VIDEO) {
1908 // This does not support split audio, as the sample_size is often not correct
1909 idx = sc->sample_to_chunk_index;
1910 if ((idx + 1 < sc->sample_to_chunk_sz)
1911 && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))
1912 idx++;
1913 sc->sample_to_chunk_index = idx;
1914 if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {
1915 mov->partial = sc;
1916 /* we'll have to get those samples before next chunk */
1917 sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
1918 size = sc->sample_size?sc->sample_size:sc->sample_sizes[sc->current_sample];
1919 }
1920
1921 sc->current_sample++;
1922 }
1923 #endif
1924
1925 readchunk:
1926 #ifdef DEBUG
1927 av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);
1928 #endif
1929 if(size == 0x0FFFFFFF)
1930 size = mov->mdat_size + mov->mdat_offset - offset;
1931 if(size < 0)
1932 return -1;
1933 if(size == 0)
1934 return -1;
1935 url_fseek(&s->pb, offset, SEEK_SET);
1936
1937 //av_log(NULL, AV_LOG_DEBUG, "READCHUNK hlen: %d %d off: %Ld pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));
1938 if (sc->header_len > 0) {
1939 av_new_packet(pkt, size + sc->header_len);
1940 memcpy(pkt->data, sc->header_data, sc->header_len);
1941 get_buffer(&s->pb, pkt->data + sc->header_len, size);
1942 /* free header */
1943 av_freep(&sc->header_data);
1944 sc->header_len = 0;
1945 } else {
1946 av_new_packet(pkt, size);
1947 get_buffer(&s->pb, pkt->data, pkt->size);
1948 }
1949 pkt->stream_index = sc->ffindex;
1950
1951 // If the keyframes table exists, mark any samples that are in the table as key frames.
1952 // If no table exists, treat very sample as a key frame.
1953 if (sc->keyframes) {
1954 a = 0;
1955 b = sc->keyframe_count - 1;
1956
1957 while (a < b) {
1958 m = (a + b + 1) >> 1;
1959 if (sc->keyframes[m] > sc->current_sample) {
1960 b = m - 1;
1961 } else {
1962 a = m;
1963 }
1964 }
1965
1966 if (sc->keyframes[a] == sc->current_sample)
1967 pkt->flags |= PKT_FLAG_KEY;
1968 }
1969 else
1970 pkt->flags |= PKT_FLAG_KEY;
1971
1972 #ifdef DEBUG
1973 /*
1974 av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);
1975 for(i=0; i<8; i++)
1976 av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);
1977 for(i=0; i<8; i++)
1978 av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);
1979 av_log(NULL, AV_LOG_DEBUG, "\n");
1980 */
1981 #endif
1982
1983 mov->next_chunk_offset = offset + size;
1984
1985 /* find the corresponding dts */
1986 if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {
1987 unsigned int count;
1988 uint64_t dts, pts;
1989 unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;
1990 count = sc->stts_data[sc->sample_to_time_index].count;
1991 if ((sc->sample_to_time_sample + count) < sc->current_sample) {
1992 sc->sample_to_time_sample += count;
1993 sc->sample_to_time_time += count*duration;
1994 sc->sample_to_time_index ++;
1995 duration = sc->stts_data[sc->sample_to_time_index].duration;
1996 }
1997 dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;
1998 /* find the corresponding pts */
1999 if (sc->sample_to_ctime_index < sc->ctts_count) {
2000 int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
2001 int count = sc->ctts_data[sc->sample_to_ctime_index].count;
2002
2003 if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {
2004 sc->sample_to_ctime_sample += count;
2005 sc->sample_to_ctime_index ++;
2006 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
2007 }
2008 pts = dts + duration;
2009 }else
2010 pts = dts;
2011 pkt->pts = av_rescale( pts,
2012 (int64_t)s->streams[sc->ffindex]->time_base.den,
2013 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
2014 pkt->dts = av_rescale( dts,
2015 (int64_t)s->streams[sc->ffindex]->time_base.den,
2016 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
2017 #ifdef DEBUG
2018 av_log(NULL, AV_LOG_DEBUG, "stream #%d smp #%ld dts = %lld pts = %lld (smp:%ld time:%lld idx:%d ent:%d count:%d dur:%d)\n"
2019 , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
2020 , sc->sample_to_time_sample
2021 , sc->sample_to_time_time
2022 , sc->sample_to_time_index
2023 , sc->stts_count
2024 , count
2025 , duration);
2026 #endif
2027 }
2028
2029 return 0;
2030 }
2031
2032 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2033 /**
2034 * Seek method based on the one described in the Appendix C of QTFileFormat.pdf
2035 */
2036 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2037 {
2038 MOVContext* mov = (MOVContext *) s->priv_data;
2039 MOVStreamContext* sc;
2040 int32_t i, a, b, m;
2041 int64_t sample_time;
2042 int64_t start_time;
2043 int32_t seek_sample, sample;
2044 int32_t duration;
2045 int32_t count;
2046 int32_t chunk;
2047 int32_t left_in_chunk;
2048 int64_t chunk_file_offset;
2049 int64_t sample_file_offset;
2050 int32_t first_chunk_sample;
2051 int32_t sample_to_chunk_idx;
2052 int sample_to_time_index;
2053 long sample_to_time_sample = 0;
2054 uint64_t sample_to_time_time = 0;
2055 int mov_idx;
2056
2057 // Find the corresponding mov stream
2058 for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)
2059 if (mov->streams[mov_idx]->ffindex == stream_index)
2060 break;
2061 if (mov_idx == mov->total_streams) {
2062 av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
2063 return -1;
2064 }
2065 sc = mov->streams[mov_idx];
2066
2067 // Step 1. Find the edit that contains the requested time (elst)
2068 if (sc->edit_count) {
2069 // FIXME should handle edit list
2070 av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
2071 return -1;
2072 }
2073
2074 // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
2075 #ifdef DEBUG
2076 av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);
2077 #endif
2078 // convert timestamp from time_base unit to timescale unit
2079 sample_time = av_rescale( timestamp,
2080 (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,
2081 (int64_t)s->streams[stream_index]->time_base.den);
2082 start_time = 0; // FIXME use elst atom
2083 sample = 1; // sample are 0 based in table
2084 #ifdef DEBUG
2085 av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);
2086 #endif
2087 for (i = 0; i < sc->stts_count; i++) {
2088 count = sc->stts_data[i].count;
2089 duration = sc->stts_data[i].duration;
2090 //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);
2091 //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);
2092 if ((start_time + count*duration) > sample_time) {
2093 sample_to_time_time = start_time;
2094 sample_to_time_index = i;
2095 sample_to_time_sample = sample;
2096 sample += (sample_time - start_time) / duration;
2097 break;
2098 }
2099 sample += count;
2100 start_time += count * duration;
2101 }
2102 sample_to_time_time = start_time;
2103 sample_to_time_index = i;
2104 /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
2105 is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
2106
2107 #ifdef DEBUG
2108 av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);
2109 #endif
2110 if (sample > sc->sample_count) {
2111 av_log(s, AV_LOG_ERROR, "mov: sample pos is too high, unable to seek (req. sample=%i, sample count=%ld)\n", sample, sc->sample_count);
2112 return -1;
2113 }
2114
2115 // Step 3. Find the prior sync. sample using the Sync sample atom (stss)
2116 if (sc->keyframes) {
2117 a = 0;
2118 b = sc->keyframe_count - 1;
2119 while (a < b) {
2120 m = (a + b + 1) >> 1;
2121 if (sc->keyframes[m] > sample) {
2122 b = m - 1;
2123 } else {
2124 a = m;
2125 }
2126 #ifdef DEBUG
2127 // av_log(s, AV_LOG_DEBUG, "a=%i (%i) b=%i (%i) m=%i (%i) stream #%i\n", a, sc->keyframes[a], b, sc->keyframes[b], m, sc->keyframes[m], mov_idx);
2128 #endif
2129 }
2130 // for low latency prob: always use the previous keyframe, just uncomment the next line
2131 // if (a) a--;
2132 seek_sample = sc->keyframes[a];
2133 }
2134 else
2135 seek_sample = sample; // else all samples are key frames
2136 #ifdef DEBUG
2137 av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);
2138 #endif
2139
2140 // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
2141 for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {
2142 b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
2143 if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
2144 break;
2145 first_chunk_sample += b;
2146 }
2147 chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;
2148 left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;
2149 first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;
2150 sample_to_chunk_idx = i;
2151 #ifdef DEBUG
2152 av_log(s, AV_LOG_DEBUG, "Sample was found in chunk #%i at sample offset %i (idx %i)\n", chunk, seek_sample - first_chunk_sample, sample_to_chunk_idx);
2153 #endif
2154
2155 // Step 5. Find the offset of the chunk using the chunk offset atom
2156 if (!sc->chunk_offsets) {
2157 av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
2158 return -1;
2159 }
2160 if (chunk > sc->chunk_count) {
2161 av_log(s, AV_LOG_ERROR, "mov: chunk offset atom too short, unable to seek (req. chunk=%i, chunk count=%li)\n", chunk, sc->chunk_count);
2162 return -1;
2163 }
2164 chunk_file_offset = sc->chunk_offsets[chunk - 1];
2165 #ifdef DEBUG
2166 av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);
2167 #endif
2168
2169 // Step 6. Find the byte offset within the chunk using the sample size atom
2170 sample_file_offset = chunk_file_offset;
2171 if (sc->sample_size)
2172 sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;
2173 else {
2174 for (i = 0; i < (seek_sample - first_chunk_sample); i++) {
2175 sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
2176 }
2177 }
2178 #ifdef DEBUG
2179 av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);
2180 #endif
2181
2182 // Step 6. Update the parser
2183 mov->partial = sc;
2184 mov->next_chunk_offset = sample_file_offset;
2185 // Update current stream state
2186 sc->current_sample = seek_sample - 1; // zero based
2187 sc->left_in_chunk = left_in_chunk;
2188 sc->next_chunk = chunk; // +1 -1 (zero based)
2189 sc->sample_to_chunk_index = sample_to_chunk_idx;
2190
2191 // Update other streams
2192 for (i = 0; i<mov->total_streams; i++) {
2193 MOVStreamContext *msc;
2194 if (i == mov_idx) continue;
2195 // Find the nearest 'next' chunk
2196 msc = mov->streams[i];
2197 a = 0;
2198 b = msc->chunk_count - 1;
2199 while (a < b) {
2200 m = (a + b + 1) >> 1;
2201 if (msc->chunk_offsets[m] > chunk_file_offset) {
2202 b = m - 1;
2203 } else {
2204 a = m;
2205 }
2206 #ifdef DEBUG
2207 /* av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"
2208 , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m], i); */
2209 #endif
2210 }
2211 msc->next_chunk = a;
2212 if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))
2213 msc->next_chunk ++;
2214 #ifdef DEBUG
2215 av_log(s, AV_LOG_DEBUG, "Nearest next chunk for stream #%i is #%i @%lli\n", i, msc->next_chunk+1, msc->chunk_offsets[msc->next_chunk]);
2216 #endif
2217 // Compute sample count and index in the sample_to_chunk table (what a pity)
2218 msc->sample_to_chunk_index = 0;
2219 msc->current_sample = 0;
2220 for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)
2221 && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {
2222 msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
2223 * msc->sample_to_chunk[msc->sample_to_chunk_index].count;
2224 }
2225 msc->current_sample += (msc->next_chunk - (msc->sample_to_chunk[msc->sample_to_chunk_index].first - 1)) * sc->sample_to_chunk[msc->sample_to_chunk_index].count;
2226 msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
2227 // Find corresponding position in stts (used later to compute dts)
2228 sample = 0;
2229 start_time = 0;
2230 for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {
2231 count = msc->stts_data[msc->sample_to_time_index].count;
2232 duration = msc->stts_data[msc->sample_to_time_index].duration;
2233 if ((sample + count - 1) > msc->current_sample) {
2234 msc->sample_to_time_time = start_time;
2235 msc->sample_to_time_sample = sample;
2236 break;
2237 }
2238 sample += count;
2239 start_time += count * duration;
2240 }
2241 sample = 0;
2242 for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {
2243 count = msc->ctts_data[msc->sample_to_ctime_index].count;
2244 duration = msc->ctts_data[msc->sample_to_ctime_index].duration;
2245 if ((sample + count - 1) > msc->current_sample) {
2246 msc->sample_to_ctime_sample = sample;
2247 break;
2248 }
2249 sample += count;
2250 }
2251 #ifdef DEBUG
2252 av_log(s, AV_LOG_DEBUG, "Next Sample for stream #%i is #%i @%i\n", i, msc->current_sample + 1, msc->sample_to_chunk_index + 1);
2253 #endif
2254 }
2255 return 0;
2256 }
2257 #endif
2258
2259 static int mov_read_close(AVFormatContext *s)
2260 {
2261 int i;
2262 MOVContext *mov = (MOVContext *) s->priv_data;
2263 for(i=0; i<mov->total_streams; i++)
2264 mov_free_stream_context(mov->streams[i]);
2265 /* free color tabs */
2266 for(i=0; i<mov->ctab_size; i++)
2267 av_freep(&mov->ctab[i]);
2268 av_freep(&mov->ctab);
2269 return 0;
2270 }
2271
2272 static AVInputFormat mov_iformat = {
2273 "mov,mp4,m4a,3gp,3g2",
2274 "QuickTime/MPEG4 format",
2275 sizeof(MOVContext),
2276 mov_probe,
2277 mov_read_header,
2278 mov_read_packet,
2279 mov_read_close,
2280 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2281 mov_read_seek,
2282 #endif
2283 };
2284
2285 int mov_init(void)
2286 {
2287 av_register_input_format(&mov_iformat);
2288 return 0;
2289 }