62286930b3f26ae2e5c8d2682dba517602c41517
[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_NONE, 0 },
146 };
147
148 /* the QuickTime file format is quite convoluted...
149 * it has lots of index tables, each indexing something in another one...
150 * Here we just use what is needed to read the chunks
151 */
152
153 typedef struct MOV_sample_to_chunk_tbl {
154 long first;
155 long count;
156 long id;
157 } MOV_sample_to_chunk_tbl;
158
159 typedef struct {
160 uint32_t type;
161 int64_t offset;
162 int64_t size; /* total size (excluding the size and type fields) */
163 } MOV_atom_t;
164
165 typedef struct {
166 int seed;
167 int flags;
168 int size;
169 void* clrs;
170 } MOV_ctab_t;
171
172 typedef struct {
173 uint8_t version;
174 uint32_t flags; // 24bit
175
176 /* 0x03 ESDescrTag */
177 uint16_t es_id;
178 #define MP4ODescrTag 0x01
179 #define MP4IODescrTag 0x02
180 #define MP4ESDescrTag 0x03
181 #define MP4DecConfigDescrTag 0x04
182 #define MP4DecSpecificDescrTag 0x05
183 #define MP4SLConfigDescrTag 0x06
184 #define MP4ContentIdDescrTag 0x07
185 #define MP4SupplContentIdDescrTag 0x08
186 #define MP4IPIPtrDescrTag 0x09
187 #define MP4IPMPPtrDescrTag 0x0A
188 #define MP4IPMPDescrTag 0x0B
189 #define MP4RegistrationDescrTag 0x0D
190 #define MP4ESIDIncDescrTag 0x0E
191 #define MP4ESIDRefDescrTag 0x0F
192 #define MP4FileIODescrTag 0x10
193 #define MP4FileODescrTag 0x11
194 #define MP4ExtProfileLevelDescrTag 0x13
195 #define MP4ExtDescrTagsStart 0x80
196 #define MP4ExtDescrTagsEnd 0xFE
197 uint8_t stream_priority;
198
199 /* 0x04 DecConfigDescrTag */
200 uint8_t object_type_id;
201 uint8_t stream_type;
202 /* XXX: really streamType is
203 * only 6bit, followed by:
204 * 1bit upStream
205 * 1bit reserved
206 */
207 uint32_t buffer_size_db; // 24
208 uint32_t max_bitrate;
209 uint32_t avg_bitrate;
210
211 /* 0x05 DecSpecificDescrTag */
212 uint8_t decoder_cfg_len;
213 uint8_t *decoder_cfg;
214
215 /* 0x06 SLConfigDescrTag */
216 uint8_t sl_config_len;
217 uint8_t *sl_config;
218 } MOV_esds_t;
219
220 struct MOVParseTableEntry;
221
222 typedef struct Time2Sample{
223 int count;
224 int duration;
225 }Time2Sample;
226
227 typedef struct MOVStreamContext {
228 int ffindex; /* the ffmpeg stream id */
229 int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */
230 long next_chunk;
231 long chunk_count;
232 int64_t *chunk_offsets;
233 int stts_count;
234 Time2Sample *stts_data;
235 int ctts_count;
236 Time2Sample *ctts_data;
237 int edit_count; /* number of 'edit' (elst atom) */
238 long sample_to_chunk_sz;
239 MOV_sample_to_chunk_tbl *sample_to_chunk;
240 long sample_to_chunk_index;
241 int sample_to_time_index;
242 long sample_to_time_sample;
243 uint64_t sample_to_time_time;
244 int sample_to_ctime_index;
245 int sample_to_ctime_sample;
246 long sample_size;
247 long sample_count;
248 long *sample_sizes;
249 long keyframe_count;
250 long *keyframes;
251 int time_scale;
252 long current_sample;
253 long left_in_chunk; /* how many samples before next chunk */
254 /* specific MPEG4 header which is added at the beginning of the stream */
255 unsigned int header_len;
256 uint8_t *header_data;
257 MOV_esds_t esds;
258 } MOVStreamContext;
259
260 typedef struct MOVContext {
261 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) */
262 AVFormatContext *fc;
263 int time_scale;
264 int duration; /* duration of the longest track */
265 int found_moov; /* when both 'moov' and 'mdat' sections has been found */
266 int found_mdat; /* we suppose we have enough data to read the file */
267 int64_t mdat_size;
268 int64_t mdat_offset;
269 int total_streams;
270 /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
271 * but we need the info to be able to skip data from those streams in the 'mdat' section
272 */
273 MOVStreamContext *streams[MAX_STREAMS];
274
275 int64_t next_chunk_offset;
276 MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */
277 int ctab_size;
278 MOV_ctab_t **ctab; /* color tables */
279 const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
280 /* NOTE: for recursion save to/ restore from local variable! */
281
282 AVPaletteControl palette_control;
283 } MOVContext;
284
285
286 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
287
288 /* those functions parse an atom */
289 /* return code:
290 1: found what I wanted, exit
291 0: continue to parse next atom
292 -1: error occured, exit
293 */
294 typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
295
296 /* links atom IDs to parse functions */
297 typedef struct MOVParseTableEntry {
298 uint32_t type;
299 mov_parse_function func;
300 } MOVParseTableEntry;
301
302 #ifdef DEBUG
303 /*
304 * XXX: static sux, even more in a multithreaded environment...
305 * Avoid them. This is here just to help debugging.
306 */
307 static int debug_indent = 0;
308 void print_atom(const char *str, MOV_atom_t atom)
309 {
310 unsigned int tag, i;
311 tag = (unsigned int) atom.type;
312 i=debug_indent;
313 if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
314 while(i--)
315 av_log(NULL, AV_LOG_DEBUG, "|");
316 av_log(NULL, AV_LOG_DEBUG, "parse:");
317 av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",
318 str, tag & 0xff,
319 (tag >> 8) & 0xff,
320 (tag >> 16) & 0xff,
321 (tag >> 24) & 0xff,
322 (unsigned int)atom.offset,
323 (unsigned int)atom.size);
324 assert((unsigned int)atom.size < 0x7fffffff);// catching errors
325 }
326 #else
327 #define print_atom(a,b)
328 #endif
329
330
331 static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
332 {
333 print_atom("leaf", atom);
334
335 if (atom.size>1)
336 url_fskip(pb, atom.size);
337 /* url_seek(pb, atom_offset+atom.size, SEEK_SET); */
338 return 0;
339 }
340
341 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
342 {
343 int64_t total_size = 0;
344 MOV_atom_t a;
345 int i;
346 int err = 0;
347
348 #ifdef DEBUG
349 print_atom("default", atom);
350 debug_indent++;
351 #endif
352
353 a.offset = atom.offset;
354
355 if (atom.size < 0)
356 atom.size = 0x7fffffffffffffffLL;
357 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
358 a.size = atom.size;
359 a.type=0L;
360 if(atom.size >= 8) {
361 a.size = get_be32(pb);
362 a.type = get_le32(pb);
363 }
364 total_size += 8;
365 a.offset += 8;
366 //av_log(NULL, AV_LOG_DEBUG, "type: %08x %.4s sz: %Lx %Lx %Lx\n", type, (char*)&type, size, atom.size, total_size);
367 if (a.size == 1) { /* 64 bit extended size */
368 a.size = get_be64(pb) - 8;
369 a.offset += 8;
370 total_size += 8;
371 }
372 if (a.size == 0) {
373 a.size = atom.size - total_size;
374 if (a.size <= 8)
375 break;
376 }
377 for (i = 0; c->parse_table[i].type != 0L
378 && c->parse_table[i].type != a.type; i++)
379 /* empty */;
380
381 a.size -= 8;
382
383 if(a.size < 0)
384 break;
385
386 // av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);
387 if (c->parse_table[i].type == 0) { /* skip leaf atoms data */
388 // url_seek(pb, atom.offset+atom.size, SEEK_SET);
389 #ifdef DEBUG
390 print_atom("unknown", a);
391 #endif
392 url_fskip(pb, a.size);
393 } else {
394 #ifdef DEBUG
395 //char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
396 //print_atom(b, type, offset, size);
397 #endif
398 err = (c->parse_table[i].func)(c, pb, a);
399 }
400
401 a.offset += a.size;
402 total_size += a.size;
403 }
404
405 if (!err && total_size < atom.size && atom.size < 0x7ffff) {
406 //av_log(NULL, AV_LOG_DEBUG, "RESET %Ld %Ld err:%d\n", atom.size, total_size, err);
407 url_fskip(pb, atom.size - total_size);
408 }
409
410 #ifdef DEBUG
411 debug_indent--;
412 #endif
413 return err;
414 }
415
416 static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
417 {
418 unsigned int len;
419 MOV_ctab_t *t;
420 #if 1
421 url_fskip(pb, atom.size); // for now
422 #else
423 VERY VERY BROKEN, NEVER execute this, needs rewrite
424 c->ctab = av_realloc(c->ctab, ++c->ctab_size);
425 t = c->ctab[c->ctab_size];
426 t->seed = get_be32(pb);
427 t->flags = get_be16(pb);
428 t->size = get_be16(pb) + 1;
429 len = 2 * t->size * 4;
430 if (len > 0) {
431 t->clrs = av_malloc(len); // 16bit A R G B
432 if (t->clrs)
433 get_buffer(pb, t->clrs, len);
434 }
435 #endif
436
437 return 0;
438 }
439
440 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
441 {
442 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
443 int len = 0;
444 uint32_t type;
445 uint32_t ctype;
446
447 print_atom("hdlr", atom);
448
449 get_byte(pb); /* version */
450 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
451
452 /* component type */
453 ctype = get_le32(pb);
454 type = get_le32(pb); /* component subtype */
455
456 #ifdef DEBUG
457 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);
458 av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
459 #endif
460 #ifdef DEBUG
461 /* XXX: yeah this is ugly... */
462 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
463 if(type == MKTAG('v', 'i', 'd', 'e'))
464 puts("hdlr: vide");
465 else if(type == MKTAG('s', 'o', 'u', 'n'))
466 puts("hdlr: soun");
467 } else if(ctype == 0) { /* MP4 */
468 if(type == MKTAG('v', 'i', 'd', 'e'))
469 puts("hdlr: vide");
470 else if(type == MKTAG('s', 'o', 'u', 'n'))
471 puts("hdlr: soun");
472 else if(type == MKTAG('o', 'd', 's', 'm'))
473 puts("hdlr: odsm");
474 else if(type == MKTAG('s', 'd', 's', 'm'))
475 puts("hdlr: sdsm");
476 } else puts("hdlr: meta");
477 #endif
478
479 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
480 /* helps parsing the string hereafter... */
481 c->mp4 = 0;
482 if(type == MKTAG('v', 'i', 'd', 'e'))
483 st->codec.codec_type = CODEC_TYPE_VIDEO;
484 else if(type == MKTAG('s', 'o', 'u', 'n'))
485 st->codec.codec_type = CODEC_TYPE_AUDIO;
486 } else if(ctype == 0) { /* MP4 */
487 /* helps parsing the string hereafter... */
488 c->mp4 = 1;
489 if(type == MKTAG('v', 'i', 'd', 'e'))
490 st->codec.codec_type = CODEC_TYPE_VIDEO;
491 else if(type == MKTAG('s', 'o', 'u', 'n'))
492 st->codec.codec_type = CODEC_TYPE_AUDIO;
493 }
494 get_be32(pb); /* component manufacture */
495 get_be32(pb); /* component flags */
496 get_be32(pb); /* component flags mask */
497
498 if(atom.size <= 24)
499 return 0; /* nothing left to read */
500 /* XXX: MP4 uses a C string, not a pascal one */
501 /* component name */
502
503 if(c->mp4) {
504 /* .mp4: C string */
505 while(get_byte(pb) && (++len < (atom.size - 24)));
506 } else {
507 /* .mov: PASCAL string */
508 #ifdef DEBUG
509 char* buf;
510 #endif
511 len = get_byte(pb);
512 #ifdef DEBUG
513 buf = (uint8_t*) av_malloc(len+1);
514 if (buf) {
515 get_buffer(pb, buf, len);
516 buf[len] = '\0';
517 av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf);
518 av_free(buf);
519 } else
520 #endif
521 url_fskip(pb, len);
522 }
523
524 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
525 return 0;
526 }
527
528 static int mov_mp4_read_descr_len(ByteIOContext *pb)
529 {
530 int len = 0;
531 int count = 4;
532 while (count--) {
533 int c = get_byte(pb);
534 len = (len << 7) | (c & 0x7f);
535 if (!(c & 0x80))
536 break;
537 }
538 return len;
539 }
540
541 static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)
542 {
543 int len;
544 *tag = get_byte(pb);
545 len = mov_mp4_read_descr_len(pb);
546 #ifdef DEBUG
547 av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
548 #endif
549 return len;
550 }
551
552 static inline unsigned int get_be24(ByteIOContext *s)
553 {
554 unsigned int val;
555 val = get_byte(s) << 16;
556 val |= get_byte(s) << 8;
557 val |= get_byte(s);
558 return val;
559 }
560
561 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
562 {
563 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
564 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
565 int64_t start_pos = url_ftell(pb);
566 int tag, len;
567
568 print_atom("esds", atom);
569
570 /* Well, broken but suffisant for some MP4 streams */
571 get_be32(pb); /* version + flags */
572 len = mov_mp4_read_descr(pb, &tag);
573 if (tag == MP4ESDescrTag) {
574 get_be16(pb); /* ID */
575 get_byte(pb); /* priority */
576 } else
577 get_be16(pb); /* ID */
578
579 len = mov_mp4_read_descr(pb, &tag);
580 if (tag == MP4DecConfigDescrTag) {
581 sc->esds.object_type_id = get_byte(pb);
582 sc->esds.stream_type = get_byte(pb);
583 sc->esds.buffer_size_db = get_be24(pb);
584 sc->esds.max_bitrate = get_be32(pb);
585 sc->esds.avg_bitrate = get_be32(pb);
586
587 len = mov_mp4_read_descr(pb, &tag);
588 //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);
589 if (tag == MP4DecSpecificDescrTag) {
590 #ifdef DEBUG
591 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
592 #endif
593 st->codec.extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
594 if (st->codec.extradata) {
595 get_buffer(pb, st->codec.extradata, len);
596 st->codec.extradata_size = len;
597 }
598 }
599 }
600 /* in any case, skip garbage */
601 url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
602 return 0;
603 }
604
605 /* this atom contains actual media data */
606 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
607 {
608 print_atom("mdat", atom);
609
610 if(atom.size == 0) /* wrong one (MP4) */
611 return 0;
612 c->found_mdat=1;
613 c->mdat_offset = atom.offset;
614 c->mdat_size = atom.size;
615 if(c->found_moov)
616 return 1; /* found both, just go */
617 url_fskip(pb, atom.size);
618 return 0; /* now go for moov */
619 }
620
621 /* this atom should contain all header atoms */
622 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
623 {
624 int err;
625
626 print_atom("moov", atom);
627
628 err = mov_read_default(c, pb, atom);
629 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
630 /* so we don't parse the whole file if over a network */
631 c->found_moov=1;
632 if(c->found_mdat)
633 return 1; /* found both, just go */
634 return 0; /* now go for mdat */
635 }
636
637
638 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
639 {
640 print_atom("mdhd", atom);
641
642 get_byte(pb); /* version */
643
644 get_byte(pb); get_byte(pb);
645 get_byte(pb); /* flags */
646
647 get_be32(pb); /* creation time */
648 get_be32(pb); /* modification time */
649
650 c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
651
652 #ifdef DEBUG
653 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 */
654 #endif
655 get_be32(pb); /* duration */
656
657 get_be16(pb); /* language */
658 get_be16(pb); /* quality */
659
660 return 0;
661 }
662
663 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
664 {
665 print_atom("mvhd", atom);
666
667 get_byte(pb); /* version */
668 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
669
670 get_be32(pb); /* creation time */
671 get_be32(pb); /* modification time */
672 c->time_scale = get_be32(pb); /* time scale */
673 #ifdef DEBUG
674 av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);
675 #endif
676 c->duration = get_be32(pb); /* duration */
677 get_be32(pb); /* preferred scale */
678
679 get_be16(pb); /* preferred volume */
680
681 url_fskip(pb, 10); /* reserved */
682
683 url_fskip(pb, 36); /* display matrix */
684
685 get_be32(pb); /* preview time */
686 get_be32(pb); /* preview duration */
687 get_be32(pb); /* poster time */
688 get_be32(pb); /* selection time */
689 get_be32(pb); /* selection duration */
690 get_be32(pb); /* current time */
691 get_be32(pb); /* next track ID */
692
693 return 0;
694 }
695
696 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
697 {
698 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
699
700 if((uint64_t)atom.size > (1<<30))
701 return -1;
702
703 // currently SVQ3 decoder expect full STSD header - so let's fake it
704 // this should be fixed and just SMI header should be passed
705 av_free(st->codec.extradata);
706 st->codec.extradata_size = 0x5a + atom.size;
707 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
708
709 if (st->codec.extradata) {
710 strcpy(st->codec.extradata, "SVQ3"); // fake
711 get_buffer(pb, st->codec.extradata + 0x5a, atom.size);
712 //av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld %s\n", atom.size, (char*)st->codec.extradata + 0x5a);
713 } else
714 url_fskip(pb, atom.size);
715
716 return 0;
717 }
718
719 static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
720 {
721 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
722
723 if((uint64_t)atom.size > (1<<30))
724 return -1;
725
726 av_free(st->codec.extradata);
727
728 st->codec.extradata_size = atom.size;
729 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
730
731 if (st->codec.extradata) {
732 get_buffer(pb, st->codec.extradata, atom.size);
733 } else
734 url_fskip(pb, atom.size);
735
736 return 0;
737 }
738
739 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
740 {
741 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
742 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
743 unsigned int i, entries;
744
745 print_atom("stco", atom);
746
747 get_byte(pb); /* version */
748 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
749
750 entries = get_be32(pb);
751
752 if(entries >= UINT_MAX/sizeof(int64_t))
753 return -1;
754
755 sc->chunk_count = entries;
756 sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));
757 if (!sc->chunk_offsets)
758 return -1;
759 if (atom.type == MKTAG('s', 't', 'c', 'o')) {
760 for(i=0; i<entries; i++) {
761 sc->chunk_offsets[i] = get_be32(pb);
762 }
763 } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
764 for(i=0; i<entries; i++) {
765 sc->chunk_offsets[i] = get_be64(pb);
766 }
767 } else
768 return -1;
769 #ifdef DEBUG
770 /*
771 for(i=0; i<entries; i++) {
772 av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
773 }
774 */
775 #endif
776 return 0;
777 }
778
779 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
780 {
781 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
782 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
783 int entries, frames_per_sample;
784 uint32_t format;
785 uint8_t codec_name[32];
786
787 /* for palette traversal */
788 int color_depth;
789 int color_start;
790 int color_count;
791 int color_end;
792 int color_index;
793 int color_dec;
794 int color_greyscale;
795 unsigned char *color_table;
796 int j;
797 unsigned char r, g, b;
798
799 print_atom("stsd", atom);
800
801 get_byte(pb); /* version */
802 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
803
804 entries = get_be32(pb);
805
806 while(entries--) { //Parsing Sample description table
807 enum CodecID id;
808 int size = get_be32(pb); /* size */
809 format = get_le32(pb); /* data format */
810
811 get_be32(pb); /* reserved */
812 get_be16(pb); /* reserved */
813 get_be16(pb); /* index */
814
815 /* for MPEG4: set codec type by looking for it */
816 id = codec_get_id(mov_video_tags, format);
817 if (id >= 0) {
818 AVCodec *codec;
819 codec = avcodec_find_decoder(id);
820 if (codec)
821 st->codec.codec_type = codec->type;
822 }
823 #ifdef DEBUG
824 av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n",
825 size,
826 (format >> 0) & 0xff,
827 (format >> 8) & 0xff,
828 (format >> 16) & 0xff,
829 (format >> 24) & 0xff,
830 st->codec.codec_type);
831 #endif
832 st->codec.codec_tag = format;
833 if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
834 MOV_atom_t a = { 0, 0, 0 };
835 st->codec.codec_id = id;
836 get_be16(pb); /* version */
837 get_be16(pb); /* revision level */
838 get_be32(pb); /* vendor */
839 get_be32(pb); /* temporal quality */
840 get_be32(pb); /* spacial quality */
841 st->codec.width = get_be16(pb); /* width */
842 st->codec.height = get_be16(pb); /* height */
843 #if 1
844 if (st->codec.codec_id == CODEC_ID_MPEG4) {
845 /* in some MPEG4 the width/height are not correct, so
846 we ignore this info */
847 st->codec.width = 0;
848 st->codec.height = 0;
849 }
850 #endif
851 get_be32(pb); /* horiz resolution */
852 get_be32(pb); /* vert resolution */
853 get_be32(pb); /* data size, always 0 */
854 frames_per_sample = get_be16(pb); /* frames per samples */
855 #ifdef DEBUG
856 av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);
857 #endif
858 get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
859 if (codec_name[0] <= 31) {
860 memcpy(st->codec.codec_name, &codec_name[1],codec_name[0]);
861 st->codec.codec_name[codec_name[0]] = 0;
862 }
863
864 st->codec.bits_per_sample = get_be16(pb); /* depth */
865 st->codec.color_table_id = get_be16(pb); /* colortable id */
866
867 /* These are set in mov_read_stts and might already be set!
868 st->codec.frame_rate = 25;
869 st->codec.frame_rate_base = 1;
870 */
871 size -= (16+8*4+2+32+2*2);
872 #if 0
873 while (size >= 8) {
874 MOV_atom_t a;
875 int64_t start_pos;
876
877 a.size = get_be32(pb);
878 a.type = get_le32(pb);
879 size -= 8;
880 #ifdef DEBUG
881 av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",
882 (a.type >> 0) & 0xff,
883 (a.type >> 8) & 0xff,
884 (a.type >> 16) & 0xff,
885 (a.type >> 24) & 0xff,
886 a.size, size);
887 #endif
888 start_pos = url_ftell(pb);
889
890 switch(a.type) {
891 case MKTAG('e', 's', 'd', 's'):
892 {
893 int tag, len;
894 /* Well, broken but suffisant for some MP4 streams */
895 get_be32(pb); /* version + flags */
896 len = mov_mp4_read_descr(pb, &tag);
897 if (tag == 0x03) {
898 /* MP4ESDescrTag */
899 get_be16(pb); /* ID */
900 get_byte(pb); /* priority */
901 len = mov_mp4_read_descr(pb, &tag);
902 if (tag != 0x04)
903 goto fail;
904 /* MP4DecConfigDescrTag */
905 get_byte(pb); /* objectTypeId */
906 get_be32(pb); /* streamType + buffer size */
907 get_be32(pb); /* max bit rate */
908 get_be32(pb); /* avg bit rate */
909 len = mov_mp4_read_descr(pb, &tag);
910 if (tag != 0x05)
911 goto fail;
912 /* MP4DecSpecificDescrTag */
913 #ifdef DEBUG
914 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
915 #endif
916 sc->header_data = av_mallocz(len);
917 if (sc->header_data) {
918 get_buffer(pb, sc->header_data, len);
919 sc->header_len = len;
920 }
921 }
922 /* in any case, skip garbage */
923 }
924 break;
925 default:
926 break;
927 }
928 fail:
929 av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld %d\n", atom.size, url_ftell(pb) - start_pos);
930 if (atom.size > 8) {
931 url_fskip(pb, (atom.size - 8) -
932 ((url_ftell(pb) - start_pos)));
933 size -= atom.size - 8;
934 }
935 }
936 if (size > 0) {
937 /* unknown extension */
938 url_fskip(pb, size);
939 }
940 #else
941
942 /* figure out the palette situation */
943 color_depth = st->codec.bits_per_sample & 0x1F;
944 color_greyscale = st->codec.bits_per_sample & 0x20;
945
946 /* if the depth is 2, 4, or 8 bpp, file is palettized */
947 if ((color_depth == 2) || (color_depth == 4) ||
948 (color_depth == 8)) {
949
950 if (color_greyscale) {
951
952 /* compute the greyscale palette */
953 color_count = 1 << color_depth;
954 color_index = 255;
955 color_dec = 256 / (color_count - 1);
956 for (j = 0; j < color_count; j++) {
957 r = g = b = color_index;
958 c->palette_control.palette[j] =
959 (r << 16) | (g << 8) | (b);
960 color_index -= color_dec;
961 if (color_index < 0)
962 color_index = 0;
963 }
964
965 } else if (st->codec.color_table_id & 0x08) {
966
967 /* if flag bit 3 is set, use the default palette */
968 color_count = 1 << color_depth;
969 if (color_depth == 2)
970 color_table = ff_qt_default_palette_4;
971 else if (color_depth == 4)
972 color_table = ff_qt_default_palette_16;
973 else
974 color_table = ff_qt_default_palette_256;
975
976 for (j = 0; j < color_count; j++) {
977 r = color_table[j * 4 + 0];
978 g = color_table[j * 4 + 1];
979 b = color_table[j * 4 + 2];
980 c->palette_control.palette[j] =
981 (r << 16) | (g << 8) | (b);
982 }
983
984 } else {
985
986 /* load the palette from the file */
987 color_start = get_be32(pb);
988 color_count = get_be16(pb);
989 color_end = get_be16(pb);
990 for (j = color_start; j <= color_end; j++) {
991 /* each R, G, or B component is 16 bits;
992 * only use the top 8 bits; skip alpha bytes
993 * up front */
994 get_byte(pb);
995 get_byte(pb);
996 r = get_byte(pb);
997 get_byte(pb);
998 g = get_byte(pb);
999 get_byte(pb);
1000 b = get_byte(pb);
1001 get_byte(pb);
1002 c->palette_control.palette[j] =
1003 (r << 16) | (g << 8) | (b);
1004 }
1005 }
1006
1007 st->codec.palctrl = &c->palette_control;
1008 st->codec.palctrl->palette_changed = 1;
1009 } else
1010 st->codec.palctrl = NULL;
1011
1012 a.size = size;
1013 mov_read_default(c, pb, a);
1014 #endif
1015 } else {
1016 st->codec.codec_id = codec_get_id(mov_audio_tags, format);
1017 if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244
1018 {
1019 #ifdef DEBUG
1020 av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");
1021 #endif
1022 get_be32(pb);get_be32(pb); //Reserved_8
1023 get_be16(pb);//Reserved_2
1024 get_be16(pb);//Reserved_2
1025 get_be32(pb);//Reserved_4
1026 get_be16(pb);//TimeScale
1027 get_be16(pb);//Reserved_2
1028
1029 //AMRSpecificBox.(10 bytes)
1030
1031 get_be32(pb); //size
1032 get_be32(pb); //type=='damr'
1033 get_be32(pb); //vendor
1034 get_byte(pb); //decoder version
1035 get_be16(pb); //mode_set
1036 get_byte(pb); //mode_change_period
1037 get_byte(pb); //frames_per_sample
1038
1039 st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames
1040 if(st->codec.codec_id==CODEC_ID_AMR_NB)
1041 {
1042 st->codec.sample_rate=8000;
1043 st->codec.channels=1;
1044 }
1045 else //AMR-WB
1046 {
1047 st->codec.sample_rate=16000;
1048 st->codec.channels=1;
1049 }
1050 st->codec.bits_per_sample=16;
1051 st->codec.bit_rate=0; /*It is not possible to tell this before we have
1052 an audio frame and even then every frame can be different*/
1053 }
1054 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))
1055 {
1056 //This is some stuff for the hint track, lets ignore it!
1057 //Do some mp4 auto detect.
1058 c->mp4=1;
1059 size-=(16);
1060 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
1061 }
1062 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))
1063 {
1064 /* Handle mp4 audio tag */
1065 get_be32(pb); /* version */
1066 get_be32(pb);
1067 st->codec.channels = get_be16(pb); /* channels */
1068 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */
1069 get_be32(pb);
1070 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */
1071 get_be16(pb);
1072 c->mp4=1;
1073 {
1074 MOV_atom_t a = { format, url_ftell(pb), size - (20 + 20 + 8) };
1075 mov_read_default(c, pb, a);
1076 }
1077 /* Get correct sample rate from extradata */
1078 if(st->codec.extradata_size) {
1079 const int samplerate_table[] = {
1080 96000, 88200, 64000, 48000, 44100, 32000,
1081 24000, 22050, 16000, 12000, 11025, 8000,
1082 7350, 0, 0, 0
1083 };
1084 unsigned char *px = st->codec.extradata;
1085 // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels
1086 int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);
1087 st->codec.sample_rate = samplerate_table[samplerate_index];
1088 st->codec.channels = (px[1] >> 3) & 15;
1089 }
1090 }
1091 else if(size>=(16+20))
1092 {//16 bytes read, reading atleast 20 more
1093 uint16_t version;
1094 #ifdef DEBUG
1095 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);
1096 #endif
1097 version = get_be16(pb); /* version */
1098 get_be16(pb); /* revision level */
1099 get_be32(pb); /* vendor */
1100
1101 st->codec.channels = get_be16(pb); /* channel count */
1102 st->codec.bits_per_sample = get_be16(pb); /* sample size */
1103
1104 /* handle specific s8 codec */
1105 get_be16(pb); /* compression id = 0*/
1106 get_be16(pb); /* packet size = 0 */
1107
1108 st->codec.sample_rate = ((get_be32(pb) >> 16));
1109 //av_log(NULL, AV_LOG_DEBUG, "CODECID %d %d %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
1110
1111 switch (st->codec.codec_id) {
1112 case CODEC_ID_PCM_S16BE:
1113 if (st->codec.bits_per_sample == 8)
1114 st->codec.codec_id = CODEC_ID_PCM_S8;
1115 /* fall */
1116 case CODEC_ID_PCM_U8:
1117 st->codec.bit_rate = st->codec.sample_rate * 8;
1118 break;
1119 default:
1120 ;
1121 }
1122
1123 //Read QT version 1 fields. In version 0 theese dont exist
1124 #ifdef DEBUG
1125 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);
1126 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));
1127 #endif
1128 if((version==1) && size>=(16+20+16))
1129 {
1130 get_be32(pb); /* samples per packet */
1131 get_be32(pb); /* bytes per packet */
1132 get_be32(pb); /* bytes per frame */
1133 get_be32(pb); /* bytes per sample */
1134 if(size>(16+20+16))
1135 {
1136 //Optional, additional atom-based fields
1137 MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
1138 #ifdef DEBUG
1139 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 ),
1140 (format >> 0) & 0xff,
1141 (format >> 8) & 0xff,
1142 (format >> 16) & 0xff,
1143 (format >> 24) & 0xff);
1144 #endif
1145 mov_read_default(c, pb, a);
1146 }
1147 }
1148 else
1149 {
1150 //We should be down to 0 bytes here, but lets make sure.
1151 size-=(16+20);
1152 #ifdef DEBUG
1153 if(size>0)
1154 av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));
1155 #endif
1156 url_fskip(pb, size);
1157 }
1158 }
1159 else
1160 {
1161 size-=16;
1162 //Unknown size, but lets do our best and skip the rest.
1163 #ifdef DEBUG
1164 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);
1165 #endif
1166 url_fskip(pb, size);
1167 }
1168 }
1169 }
1170
1171 return 0;
1172 }
1173
1174 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1175 {
1176 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1177 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1178 unsigned int i, entries;
1179
1180 print_atom("stsc", atom);
1181
1182 get_byte(pb); /* version */
1183 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1184
1185 entries = get_be32(pb);
1186
1187 if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))
1188 return -1;
1189
1190 #ifdef DEBUG
1191 av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1192 #endif
1193 sc->sample_to_chunk_sz = entries;
1194 sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
1195 if (!sc->sample_to_chunk)
1196 return -1;
1197 for(i=0; i<entries; i++) {
1198 sc->sample_to_chunk[i].first = get_be32(pb);
1199 sc->sample_to_chunk[i].count = get_be32(pb);
1200 sc->sample_to_chunk[i].id = get_be32(pb);
1201 #ifdef DEBUG
1202 /* 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); */
1203 #endif
1204 }
1205 return 0;
1206 }
1207
1208 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1209 {
1210 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1211 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1212 unsigned int i, entries;
1213
1214 print_atom("stss", atom);
1215
1216 get_byte(pb); /* version */
1217 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1218
1219 entries = get_be32(pb);
1220
1221 if(entries >= UINT_MAX / sizeof(long))
1222 return -1;
1223
1224 sc->keyframe_count = entries;
1225 #ifdef DEBUG
1226 av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);
1227 #endif
1228 sc->keyframes = (long*) av_malloc(entries * sizeof(long));
1229 if (!sc->keyframes)
1230 return -1;
1231 for(i=0; i<entries; i++) {
1232 sc->keyframes[i] = get_be32(pb);
1233 #ifdef DEBUG
1234 /* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
1235 #endif
1236 }
1237 return 0;
1238 }
1239
1240 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1241 {
1242 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1243 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1244 unsigned int i, entries;
1245
1246 print_atom("stsz", atom);
1247
1248 get_byte(pb); /* version */
1249 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1250
1251 sc->sample_size = get_be32(pb);
1252 entries = get_be32(pb);
1253 if(entries >= UINT_MAX / sizeof(long))
1254 return -1;
1255
1256 sc->sample_count = entries;
1257 #ifdef DEBUG
1258 av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
1259 #endif
1260 if(sc->sample_size)
1261 return 0; /* there isn't any table following */
1262 sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));
1263 if (!sc->sample_sizes)
1264 return -1;
1265 for(i=0; i<entries; i++) {
1266 sc->sample_sizes[i] = get_be32(pb);
1267 #ifdef DEBUG
1268 av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);
1269 #endif
1270 }
1271 return 0;
1272 }
1273
1274 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1275 {
1276 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1277 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1278 unsigned int i, entries;
1279 int64_t duration=0;
1280 int64_t total_sample_count=0;
1281
1282 print_atom("stts", atom);
1283
1284 get_byte(pb); /* version */
1285 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1286 entries = get_be32(pb);
1287 if(entries >= UINT_MAX / sizeof(Time2Sample))
1288 return -1;
1289
1290 c->streams[c->fc->nb_streams-1]->stts_count = entries;
1291 c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));
1292
1293 #ifdef DEBUG
1294 av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1295 #endif
1296 for(i=0; i<entries; i++) {
1297 int sample_duration;
1298 int sample_count;
1299
1300 sample_count=get_be32(pb);
1301 sample_duration = get_be32(pb);
1302 c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;
1303 c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;
1304 #ifdef DEBUG
1305 av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1306 #endif
1307 duration+=sample_duration*sample_count;
1308 total_sample_count+=sample_count;
1309
1310 #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone
1311
1312 if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {
1313 st->codec.frame_rate_base = sample_duration ? sample_duration : 1;
1314 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1315 #ifdef DEBUG
1316 av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);
1317 #endif
1318 }
1319 #endif
1320 }
1321
1322 /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/
1323 if(duration>0)
1324 {
1325 av_reduce(
1326 &st->codec.frame_rate,
1327 &st->codec.frame_rate_base,
1328 c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,
1329 duration,
1330 INT_MAX
1331 );
1332
1333 #ifdef DEBUG
1334 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);
1335 #endif
1336 }
1337 else
1338 {
1339 st->codec.frame_rate_base = 1;
1340 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1341 }
1342 return 0;
1343 }
1344
1345 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1346 {
1347 // AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1348 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1349 unsigned int i, entries;
1350
1351 print_atom("ctts", atom);
1352
1353 get_byte(pb); /* version */
1354 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1355 entries = get_be32(pb);
1356 if(entries >= UINT_MAX / sizeof(Time2Sample))
1357 return -1;
1358
1359 c->streams[c->fc->nb_streams-1]->ctts_count = entries;
1360 c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));
1361
1362 // #ifdef DEBUG
1363 av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1364 // #endif
1365 for(i=0; i<entries; i++) {
1366 c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);
1367 c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);
1368 }
1369 return 0;
1370 }
1371
1372 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1373 {
1374 AVStream *st;
1375 MOVStreamContext *sc;
1376
1377 print_atom("trak", atom);
1378
1379 st = av_new_stream(c->fc, c->fc->nb_streams);
1380 if (!st) return -2;
1381 sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
1382 if (!sc) {
1383 av_free(st);
1384 return -1;
1385 }
1386
1387 sc->sample_to_chunk_index = -1;
1388 st->priv_data = sc;
1389 st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
1390 st->start_time = 0; /* XXX: check */
1391 st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;
1392 c->streams[c->fc->nb_streams-1] = sc;
1393
1394 return mov_read_default(c, pb, atom);
1395 }
1396
1397 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1398 {
1399 AVStream *st;
1400
1401 print_atom("tkhd", atom);
1402
1403 st = c->fc->streams[c->fc->nb_streams-1];
1404
1405 get_byte(pb); /* version */
1406
1407 get_byte(pb); get_byte(pb);
1408 get_byte(pb); /* flags */
1409 /*
1410 MOV_TRACK_ENABLED 0x0001
1411 MOV_TRACK_IN_MOVIE 0x0002
1412 MOV_TRACK_IN_PREVIEW 0x0004
1413 MOV_TRACK_IN_POSTER 0x0008
1414 */
1415
1416 get_be32(pb); /* creation time */
1417 get_be32(pb); /* modification time */
1418 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1419 get_be32(pb); /* reserved */
1420 st->start_time = 0; /* check */
1421 st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */
1422 get_be32(pb); /* reserved */
1423 get_be32(pb); /* reserved */
1424
1425 get_be16(pb); /* layer */
1426 get_be16(pb); /* alternate group */
1427 get_be16(pb); /* volume */
1428 get_be16(pb); /* reserved */
1429
1430 url_fskip(pb, 36); /* display matrix */
1431
1432 /* those are fixed-point */
1433 st->codec.width = get_be32(pb) >> 16; /* track width */
1434 st->codec.height = get_be32(pb) >> 16; /* track height */
1435
1436 return 0;
1437 }
1438
1439 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1440 /* like the files created with Adobe Premiere 5.0, for samples see */
1441 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1442 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1443 {
1444 int err;
1445
1446 #ifdef DEBUG
1447 print_atom("wide", atom);
1448 debug_indent++;
1449 #endif
1450 if (atom.size < 8)
1451 return 0; /* continue */
1452 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1453 url_fskip(pb, atom.size - 4);
1454 return 0;
1455 }
1456 atom.type = get_le32(pb);
1457 atom.offset += 8;
1458 atom.size -= 8;
1459 if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1460 url_fskip(pb, atom.size);
1461 return 0;
1462 }
1463 err = mov_read_mdat(c, pb, atom);
1464 #ifdef DEBUG
1465 debug_indent--;
1466 #endif
1467 return err;
1468 }
1469
1470
1471 #ifdef CONFIG_ZLIB
1472 static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
1473 {
1474 return -1;
1475 }
1476
1477 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1478 {
1479 ByteIOContext ctx;
1480 uint8_t *cmov_data;
1481 uint8_t *moov_data; /* uncompressed data */
1482 long cmov_len, moov_len;
1483 int ret;
1484
1485 print_atom("cmov", atom);
1486
1487 get_be32(pb); /* dcom atom */
1488 if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1489 return -1;
1490 if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1491 av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");
1492 return -1;
1493 }
1494 get_be32(pb); /* cmvd atom */
1495 if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1496 return -1;
1497 moov_len = get_be32(pb); /* uncompressed size */
1498 cmov_len = atom.size - 6 * 4;
1499
1500 cmov_data = (uint8_t *) av_malloc(cmov_len);
1501 if (!cmov_data)
1502 return -1;
1503 moov_data = (uint8_t *) av_malloc(moov_len);
1504 if (!moov_data) {
1505 av_free(cmov_data);
1506 return -1;
1507 }
1508 get_buffer(pb, cmov_data, cmov_len);
1509 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1510 return -1;
1511 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)
1512 return -1;
1513 ctx.buf_end = ctx.buffer + moov_len;
1514 atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1515 atom.offset = 0;
1516 atom.size = moov_len;
1517 #ifdef DEBUG
1518 { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1519 #endif
1520 ret = mov_read_default(c, &ctx, atom);
1521 av_free(moov_data);
1522 av_free(cmov_data);
1523
1524 return ret;
1525 }
1526 #endif
1527
1528 /* edit list atom */
1529 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1530 {
1531 int i, edit_count;
1532 print_atom("elst", atom);
1533
1534 get_byte(pb); /* version */
1535 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1536 edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */
1537
1538 for(i=0; i<edit_count; i++){
1539 get_be32(pb); /* Track duration */
1540 get_be32(pb); /* Media time */
1541 get_be32(pb); /* Media rate */
1542 }
1543 #ifdef DEBUG
1544 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);
1545 #endif
1546 return 0;
1547 }
1548
1549 static const MOVParseTableEntry mov_default_parse_table[] = {
1550 /* mp4 atoms */
1551 { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1552 { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
1553 { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
1554 { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1555 { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
1556 { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
1557 { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
1558 { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1559 { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1560 { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
1561 { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1562 { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
1563 { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
1564 { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
1565 { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1566 { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1567 { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1568 { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1569 { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1570 { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
1571 { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
1572 { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
1573 { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
1574 { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1575 { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
1576 { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
1577 { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
1578 { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
1579 { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
1580 { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1581 { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },
1582 { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1583 { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1584 { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
1585 { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1586 { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1587 { MKTAG( 's', 't', 's', 'h' ), mov_read_default },
1588 { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1589 { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1590 { MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1591 { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1592 { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1593 { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
1594 { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
1595 { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
1596 { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
1597 { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },
1598 { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
1599 { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },
1600 /* extra mp4 */
1601 { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
1602 /* QT atoms */
1603 { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
1604 { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
1605 { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
1606 { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
1607 { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1608 { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
1609 { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
1610 { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
1611 { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
1612 { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
1613 { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
1614 { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
1615 { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
1616 { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
1617 { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
1618 { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1619 //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
1620 #ifdef CONFIG_ZLIB
1621 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1622 #else
1623 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
1624 #endif
1625 { 0L, mov_read_leaf }
1626 };
1627
1628 static void mov_free_stream_context(MOVStreamContext *sc)
1629 {
1630 if(sc) {
1631 av_freep(&sc->chunk_offsets);
1632 av_freep(&sc->sample_to_chunk);
1633 av_freep(&sc->sample_sizes);
1634 av_freep(&sc->keyframes);
1635 av_freep(&sc->header_data);
1636 av_freep(&sc->stts_data);
1637 av_freep(&sc->ctts_data);
1638 av_freep(&sc);
1639 }
1640 }
1641
1642 static inline uint32_t mov_to_tag(uint8_t *buf)
1643 {
1644 return MKTAG(buf[0], buf[1], buf[2], buf[3]);
1645 }
1646
1647 static inline uint32_t to_be32(uint8_t *buf)
1648 {
1649 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
1650 }
1651
1652 /* XXX: is it sufficient ? */
1653 static int mov_probe(AVProbeData *p)
1654 {
1655 unsigned int offset;
1656 uint32_t tag;
1657 int score = 0;
1658
1659 /* check file header */
1660 if (p->buf_size <= 12)
1661 return 0;
1662 offset = 0;
1663 for(;;) {
1664 /* ignore invalid offset */
1665 if ((offset + 8) > (unsigned int)p->buf_size)
1666 return score;
1667 tag = mov_to_tag(p->buf + offset + 4);
1668 switch(tag) {
1669 /* check for obvious tags */
1670 case MKTAG( 'm', 'o', 'o', 'v' ):
1671 case MKTAG( 'm', 'd', 'a', 't' ):
1672 case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1673 case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1674 return AVPROBE_SCORE_MAX;
1675 /* those are more common words, so rate then a bit less */
1676 case MKTAG( 'w', 'i', 'd', 'e' ):
1677 case MKTAG( 'f', 'r', 'e', 'e' ):
1678 case MKTAG( 'j', 'u', 'n', 'k' ):
1679 case MKTAG( 'p', 'i', 'c', 't' ):
1680 return AVPROBE_SCORE_MAX - 5;
1681 case MKTAG( 'f', 't', 'y', 'p' ):
1682 case MKTAG( 's', 'k', 'i', 'p' ):
1683 offset = to_be32(p->buf+offset) + offset;
1684 /* if we only find those cause probedata is too small at least rate them */
1685 score = AVPROBE_SCORE_MAX - 50;
1686 break;
1687 default:
1688 /* unrecognized tag */
1689 return score;
1690 }
1691 }
1692 return score;
1693 }
1694
1695 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1696 {
1697 MOVContext *mov = (MOVContext *) s->priv_data;
1698 ByteIOContext *pb = &s->pb;
1699 int i, j, nb, err;
1700 MOV_atom_t atom = { 0, 0, 0 };
1701
1702 mov->fc = s;
1703 mov->parse_table = mov_default_parse_table;
1704 #if 0
1705 /* XXX: I think we should auto detect */
1706 if(s->iformat->name[1] == 'p')
1707 mov->mp4 = 1;
1708 #endif
1709 if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1710 atom.size = url_filesize(url_fileno(pb));
1711 else
1712 atom.size = 0x7FFFFFFFFFFFFFFFLL;
1713
1714 #ifdef DEBUG
1715 av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);
1716 #endif
1717
1718 /* check MOV header */
1719 err = mov_read_default(mov, pb, atom);
1720 if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1721 av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",
1722 err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1723 return -1;
1724 }
1725 #ifdef DEBUG
1726 av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1727 #endif
1728 /* some cleanup : make sure we are on the mdat atom */
1729 if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
1730 url_fseek(pb, mov->mdat_offset, SEEK_SET);
1731
1732 mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
1733
1734 #ifdef DEBUG
1735 av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));
1736 #endif
1737
1738 #ifdef DEBUG
1739 av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);
1740 #endif
1741 mov->total_streams = nb = s->nb_streams;
1742
1743 #if 1
1744 for(i=0; i<s->nb_streams;) {
1745 if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
1746 av_free(s->streams[i]);
1747 for(j=i+1; j<s->nb_streams; j++)
1748 s->streams[j-1] = s->streams[j];
1749 s->nb_streams--;
1750 } else
1751 i++;
1752 }
1753 for(i=0; i<s->nb_streams;i++) {
1754 MOVStreamContext *sc;
1755 sc = (MOVStreamContext *)s->streams[i]->priv_data;
1756 sc->ffindex = i;
1757 sc->is_ff_stream = 1;
1758 }
1759 #endif
1760 #ifdef DEBUG
1761 av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);
1762 #endif
1763 return 0;
1764 }
1765
1766 /* Yes, this is ugly... I didn't write the specs of QT :p */
1767 /* XXX:remove useless commented code sometime */
1768 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1769 {
1770 MOVContext *mov = (MOVContext *) s->priv_data;
1771 MOVStreamContext *sc;
1772 int64_t offset = 0x0FFFFFFFFFFFFFFFLL;
1773 int i, a, b, m;
1774 int size;
1775 int idx;
1776 size = 0x0FFFFFFF;
1777
1778 #ifdef MOV_SPLIT_CHUNKS
1779 if (mov->partial) {
1780 sc = mov->partial;
1781 idx = sc->sample_to_chunk_index;
1782
1783 if (idx < 0) return 0;
1784 #ifdef DEBUG
1785 fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);
1786 #endif
1787 // sample_size is not always correct for audio. Quicktime ignores this value and
1788 // computes it differently.
1789 if(s->streams[sc->ffindex]->codec.codec_type == CODEC_TYPE_VIDEO)
1790 size = sc->sample_size?sc->sample_size:sc->sample_sizes[sc->current_sample];
1791 sc->current_sample++;
1792 sc->left_in_chunk--;
1793
1794 if (sc->left_in_chunk <= 0)
1795 mov->partial = 0;
1796 offset = mov->next_chunk_offset;
1797 /* extract the sample */
1798
1799 goto readchunk;
1800 }
1801 #endif
1802
1803 again:
1804 sc = 0;
1805 for(i=0; i<mov->total_streams; i++) {
1806 MOVStreamContext *msc = mov->streams[i];
1807 //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));
1808 if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0
1809 && (msc->chunk_offsets[msc->next_chunk] < offset)) {
1810 sc = msc;
1811 offset = msc->chunk_offsets[msc->next_chunk];
1812 //av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
1813 }
1814 }
1815 if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)
1816 return -1;
1817
1818 sc->next_chunk++;
1819
1820 if(mov->next_chunk_offset < offset) { /* some meta data */
1821 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1822 mov->next_chunk_offset = offset;
1823 }
1824
1825 //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
1826 if(!sc->is_ff_stream || s->streams[sc->ffindex]->discard) {
1827 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1828 mov->next_chunk_offset = offset;
1829 offset = 0x0FFFFFFFFFFFFFFFLL;
1830 goto again;
1831 }
1832
1833 /* now get the chunk size... */
1834
1835 for(i=0; i<mov->total_streams; i++) {
1836 MOVStreamContext *msc = mov->streams[i];
1837 if ((msc->next_chunk < msc->chunk_count)
1838 && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))
1839 size = msc->chunk_offsets[msc->next_chunk] - offset;
1840 }
1841
1842 #ifdef MOV_MINOLTA_FIX
1843 //Make sure that size is according to sample_size (Needed by .mov files
1844 //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
1845 //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
1846 //but I have no such movies
1847 if (sc->sample_size > 0) {
1848 int foundsize=0;
1849 for(i=0; i<(sc->sample_to_chunk_sz); i++) {
1850 if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )
1851 {
1852 // I can't figure out why for PCM audio sample_size is always 1
1853 // (it should actually be channels*bits_per_second/8) but it is.
1854 AVCodecContext* cod = &s->streams[sc->ffindex]->codec;
1855 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))
1856 foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
1857 else
1858 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;
1859 }
1860 #ifdef DEBUG
1861 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);
1862 #endif
1863 }
1864 if( (foundsize>0) && (foundsize<size) )
1865 {
1866 #ifdef DEBUG
1867 /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/
1868 #endif
1869 size=foundsize;
1870 }
1871 }
1872 #endif //MOV_MINOLTA_FIX
1873
1874 #ifdef MOV_SPLIT_CHUNKS
1875 /* split chunks into samples */
1876 if (s->streams[sc->ffindex]->codec.codec_type == CODEC_TYPE_VIDEO) {
1877 // This does not support split audio, as the sample_size is often not correct
1878 idx = sc->sample_to_chunk_index;
1879 if ((idx + 1 < sc->sample_to_chunk_sz)
1880 && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))
1881 idx++;
1882 sc->sample_to_chunk_index = idx;
1883 if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {
1884 mov->partial = sc;
1885 /* we'll have to get those samples before next chunk */
1886 sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
1887 size = sc->sample_size?sc->sample_size:sc->sample_sizes[sc->current_sample];
1888 }
1889
1890 sc->current_sample++;
1891 }
1892 #endif
1893
1894 readchunk:
1895 #ifdef DEBUG
1896 av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);
1897 #endif
1898 if(size == 0x0FFFFFFF)
1899 size = mov->mdat_size + mov->mdat_offset - offset;
1900 if(size < 0)
1901 return -1;
1902 if(size == 0)
1903 return -1;
1904 url_fseek(&s->pb, offset, SEEK_SET);
1905
1906 //av_log(NULL, AV_LOG_DEBUG, "READCHUNK hlen: %d %d off: %Ld pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));
1907 if (sc->header_len > 0) {
1908 av_new_packet(pkt, size + sc->header_len);
1909 memcpy(pkt->data, sc->header_data, sc->header_len);
1910 get_buffer(&s->pb, pkt->data + sc->header_len, size);
1911 /* free header */
1912 av_freep(&sc->header_data);
1913 sc->header_len = 0;
1914 } else {
1915 av_new_packet(pkt, size);
1916 get_buffer(&s->pb, pkt->data, pkt->size);
1917 }
1918 pkt->stream_index = sc->ffindex;
1919
1920 // If the keyframes table exists, mark any samples that are in the table as key frames.
1921 // If no table exists, treat very sample as a key frame.
1922 if (sc->keyframes) {
1923 a = 0;
1924 b = sc->keyframe_count - 1;
1925
1926 while (a < b) {
1927 m = (a + b + 1) >> 1;
1928 if (sc->keyframes[m] > sc->current_sample) {
1929 b = m - 1;
1930 } else {
1931 a = m;
1932 }
1933 }
1934
1935 if (sc->keyframes[a] == sc->current_sample)
1936 pkt->flags |= PKT_FLAG_KEY;
1937 }
1938 else
1939 pkt->flags |= PKT_FLAG_KEY;
1940
1941 #ifdef DEBUG
1942 /*
1943 av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);
1944 for(i=0; i<8; i++)
1945 av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);
1946 for(i=0; i<8; i++)
1947 av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);
1948 av_log(NULL, AV_LOG_DEBUG, "\n");
1949 */
1950 #endif
1951
1952 mov->next_chunk_offset = offset + size;
1953
1954 /* find the corresponding dts */
1955 if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {
1956 unsigned int count;
1957 uint64_t dts, pts;
1958 unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;
1959 count = sc->stts_data[sc->sample_to_time_index].count;
1960 if ((sc->sample_to_time_sample + count) < sc->current_sample) {
1961 sc->sample_to_time_sample += count;
1962 sc->sample_to_time_time += count*duration;
1963 sc->sample_to_time_index ++;
1964 duration = sc->stts_data[sc->sample_to_time_index].duration;
1965 }
1966 dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;
1967 /* find the corresponding pts */
1968 if (sc->sample_to_ctime_index < sc->ctts_count) {
1969 int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
1970 int count = sc->ctts_data[sc->sample_to_ctime_index].count;
1971
1972 if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {
1973 sc->sample_to_ctime_sample += count;
1974 sc->sample_to_ctime_index ++;
1975 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
1976 }
1977 pts = dts + duration;
1978 }else
1979 pts = dts;
1980 pkt->pts = av_rescale( pts,
1981 (int64_t)s->streams[sc->ffindex]->time_base.den,
1982 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
1983 pkt->dts = av_rescale( dts,
1984 (int64_t)s->streams[sc->ffindex]->time_base.den,
1985 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
1986 #ifdef DEBUG
1987 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"
1988 , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
1989 , sc->sample_to_time_sample
1990 , sc->sample_to_time_time
1991 , sc->sample_to_time_index
1992 , sc->stts_count
1993 , count
1994 , duration);
1995 #endif
1996 }
1997
1998 return 0;
1999 }
2000
2001 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2002 /**
2003 * Seek method based on the one described in the Appendix C of QTFileFormat.pdf
2004 */
2005 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2006 {
2007 MOVContext* mov = (MOVContext *) s->priv_data;
2008 MOVStreamContext* sc;
2009 int32_t i, a, b, m;
2010 int64_t sample_time;
2011 int64_t start_time;
2012 int32_t seek_sample, sample;
2013 int32_t duration;
2014 int32_t count;
2015 int32_t chunk;
2016 int32_t left_in_chunk;
2017 int64_t chunk_file_offset;
2018 int64_t sample_file_offset;
2019 int32_t first_chunk_sample;
2020 int32_t sample_to_chunk_idx;
2021 int sample_to_time_index;
2022 long sample_to_time_sample = 0;
2023 uint64_t sample_to_time_time = 0;
2024 int mov_idx;
2025
2026 // Find the corresponding mov stream
2027 for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)
2028 if (mov->streams[mov_idx]->ffindex == stream_index)
2029 break;
2030 if (mov_idx == mov->total_streams) {
2031 av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
2032 return -1;
2033 }
2034 sc = mov->streams[mov_idx];
2035
2036 // Step 1. Find the edit that contains the requested time (elst)
2037 if (sc->edit_count) {
2038 // FIXME should handle edit list
2039 av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
2040 return -1;
2041 }
2042
2043 // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
2044 #ifdef DEBUG
2045 av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);
2046 #endif
2047 // convert timestamp from time_base unit to timescale unit
2048 sample_time = av_rescale( timestamp,
2049 (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,
2050 (int64_t)s->streams[stream_index]->time_base.den);
2051 start_time = 0; // FIXME use elst atom
2052 sample = 1; // sample are 0 based in table
2053 #ifdef DEBUG
2054 av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);
2055 #endif
2056 for (i = 0; i < sc->stts_count; i++) {
2057 count = sc->stts_data[i].count;
2058 duration = sc->stts_data[i].duration;
2059 //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);
2060 //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);
2061 if ((start_time + count*duration) > sample_time) {
2062 sample_to_time_time = start_time;
2063 sample_to_time_index = i;
2064 sample_to_time_sample = sample;
2065 sample += (sample_time - start_time) / duration;
2066 break;
2067 }
2068 sample += count;
2069 start_time += count * duration;
2070 }
2071 sample_to_time_time = start_time;
2072 sample_to_time_index = i;
2073 /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
2074 is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
2075
2076 #ifdef DEBUG
2077 av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);
2078 #endif
2079 if (sample > sc->sample_count) {
2080 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);
2081 return -1;
2082 }
2083
2084 // Step 3. Find the prior sync. sample using the Sync sample atom (stss)
2085 if (sc->keyframes) {
2086 a = 0;
2087 b = sc->keyframe_count - 1;
2088 while (a < b) {
2089 m = (a + b + 1) >> 1;
2090 if (sc->keyframes[m] > sample) {
2091 b = m - 1;
2092 } else {
2093 a = m;
2094 }
2095 #ifdef DEBUG
2096 // 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);
2097 #endif
2098 }
2099 // for low latency prob: always use the previous keyframe, just uncomment the next line
2100 // if (a) a--;
2101 seek_sample = sc->keyframes[a];
2102 }
2103 else
2104 seek_sample = sample; // else all samples are key frames
2105 #ifdef DEBUG
2106 av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);
2107 #endif
2108
2109 // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
2110 for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {
2111 b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
2112 if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
2113 break;
2114 first_chunk_sample += b;
2115 }
2116 chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;
2117 left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;
2118 first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;
2119 sample_to_chunk_idx = i;
2120 #ifdef DEBUG
2121 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);
2122 #endif
2123
2124 // Step 5. Find the offset of the chunk using the chunk offset atom
2125 if (!sc->chunk_offsets) {
2126 av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
2127 return -1;
2128 }
2129 if (chunk > sc->chunk_count) {
2130 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);
2131 return -1;
2132 }
2133 chunk_file_offset = sc->chunk_offsets[chunk - 1];
2134 #ifdef DEBUG
2135 av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);
2136 #endif
2137
2138 // Step 6. Find the byte offset within the chunk using the sample size atom
2139 sample_file_offset = chunk_file_offset;
2140 if (sc->sample_size)
2141 sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;
2142 else {
2143 for (i = 0; i < (seek_sample - first_chunk_sample); i++) {
2144 sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
2145 }
2146 }
2147 #ifdef DEBUG
2148 av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);
2149 #endif
2150
2151 // Step 6. Update the parser
2152 mov->partial = sc;
2153 mov->next_chunk_offset = sample_file_offset;
2154 // Update current stream state
2155 sc->current_sample = seek_sample - 1; // zero based
2156 sc->left_in_chunk = left_in_chunk;
2157 sc->next_chunk = chunk; // +1 -1 (zero based)
2158 sc->sample_to_chunk_index = sample_to_chunk_idx;
2159
2160 // Update other streams
2161 for (i = 0; i<mov->total_streams; i++) {
2162 MOVStreamContext *msc;
2163 if (i == mov_idx) continue;
2164 // Find the nearest 'next' chunk
2165 msc = mov->streams[i];
2166 a = 0;
2167 b = msc->chunk_count - 1;
2168 while (a < b) {
2169 m = (a + b + 1) >> 1;
2170 if (msc->chunk_offsets[m] > chunk_file_offset) {
2171 b = m - 1;
2172 } else {
2173 a = m;
2174 }
2175 #ifdef DEBUG
2176 /* av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"
2177 , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m], i); */
2178 #endif
2179 }
2180 msc->next_chunk = a;
2181 if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))
2182 msc->next_chunk ++;
2183 #ifdef DEBUG
2184 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]);
2185 #endif
2186 // Compute sample count and index in the sample_to_chunk table (what a pity)
2187 msc->sample_to_chunk_index = 0;
2188 msc->current_sample = 0;
2189 for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)
2190 && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {
2191 msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
2192 * msc->sample_to_chunk[msc->sample_to_chunk_index].count;
2193 }
2194 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;
2195 msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
2196 // Find corresponding position in stts (used later to compute dts)
2197 sample = 0;
2198 start_time = 0;
2199 for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {
2200 count = msc->stts_data[msc->sample_to_time_index].count;
2201 duration = msc->stts_data[msc->sample_to_time_index].duration;
2202 if ((sample + count - 1) > msc->current_sample) {
2203 msc->sample_to_time_time = start_time;
2204 msc->sample_to_time_sample = sample;
2205 break;
2206 }
2207 sample += count;
2208 start_time += count * duration;
2209 }
2210 sample = 0;
2211 for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {
2212 count = msc->ctts_data[msc->sample_to_ctime_index].count;
2213 duration = msc->ctts_data[msc->sample_to_ctime_index].duration;
2214 if ((sample + count - 1) > msc->current_sample) {
2215 msc->sample_to_ctime_sample = sample;
2216 break;
2217 }
2218 sample += count;
2219 }
2220 #ifdef DEBUG
2221 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);
2222 #endif
2223 }
2224 return 0;
2225 }
2226 #endif
2227
2228 static int mov_read_close(AVFormatContext *s)
2229 {
2230 int i;
2231 MOVContext *mov = (MOVContext *) s->priv_data;
2232 for(i=0; i<mov->total_streams; i++)
2233 mov_free_stream_context(mov->streams[i]);
2234 /* free color tabs */
2235 for(i=0; i<mov->ctab_size; i++)
2236 av_freep(&mov->ctab[i]);
2237 av_freep(&mov->ctab);
2238 return 0;
2239 }
2240
2241 static AVInputFormat mov_iformat = {
2242 "mov,mp4,m4a,3gp",
2243 "QuickTime/MPEG4 format",
2244 sizeof(MOVContext),
2245 mov_probe,
2246 mov_read_header,
2247 mov_read_packet,
2248 mov_read_close,
2249 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2250 mov_read_seek,
2251 #endif
2252 };
2253
2254 int mov_init(void)
2255 {
2256 av_register_input_format(&mov_iformat);
2257 return 0;
2258 }