drop most url_fileno() calls (allows to use ByteIOContext directly in caller apps...
[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_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
107 /* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
108 { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
109 { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
110 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
111 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
112 /* { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */
113 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
114 { CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
115 { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
116 { CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
117 { CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
118 { CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
119 { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
120 { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
121 { CODEC_ID_NONE, 0 },
122 };
123
124 static const CodecTag mov_audio_tags[] = {
125 /* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */
126 { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
127 /* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */
128 { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
129 { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
130 { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
131 { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
132 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
133 { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
134 { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
135
136 { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
137 { CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */
138 { CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */
139 /* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
140 /* MP4 tags */
141 { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
142 /* The standard for mpeg4 audio is still not normalised AFAIK anyway */
143 { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
144 { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
145 { CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */
146 { CODEC_ID_ALAC,MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
147 { CODEC_ID_NONE, 0 },
148 };
149
150 /* the QuickTime file format is quite convoluted...
151 * it has lots of index tables, each indexing something in another one...
152 * Here we just use what is needed to read the chunks
153 */
154
155 typedef struct MOV_sample_to_chunk_tbl {
156 long first;
157 long count;
158 long id;
159 } MOV_sample_to_chunk_tbl;
160
161 typedef struct {
162 uint32_t type;
163 int64_t offset;
164 int64_t size; /* total size (excluding the size and type fields) */
165 } MOV_atom_t;
166
167 typedef struct {
168 int seed;
169 int flags;
170 int size;
171 void* clrs;
172 } MOV_ctab_t;
173
174 typedef struct {
175 uint8_t version;
176 uint32_t flags; // 24bit
177
178 /* 0x03 ESDescrTag */
179 uint16_t es_id;
180 #define MP4ODescrTag 0x01
181 #define MP4IODescrTag 0x02
182 #define MP4ESDescrTag 0x03
183 #define MP4DecConfigDescrTag 0x04
184 #define MP4DecSpecificDescrTag 0x05
185 #define MP4SLConfigDescrTag 0x06
186 #define MP4ContentIdDescrTag 0x07
187 #define MP4SupplContentIdDescrTag 0x08
188 #define MP4IPIPtrDescrTag 0x09
189 #define MP4IPMPPtrDescrTag 0x0A
190 #define MP4IPMPDescrTag 0x0B
191 #define MP4RegistrationDescrTag 0x0D
192 #define MP4ESIDIncDescrTag 0x0E
193 #define MP4ESIDRefDescrTag 0x0F
194 #define MP4FileIODescrTag 0x10
195 #define MP4FileODescrTag 0x11
196 #define MP4ExtProfileLevelDescrTag 0x13
197 #define MP4ExtDescrTagsStart 0x80
198 #define MP4ExtDescrTagsEnd 0xFE
199 uint8_t stream_priority;
200
201 /* 0x04 DecConfigDescrTag */
202 uint8_t object_type_id;
203 uint8_t stream_type;
204 /* XXX: really streamType is
205 * only 6bit, followed by:
206 * 1bit upStream
207 * 1bit reserved
208 */
209 uint32_t buffer_size_db; // 24
210 uint32_t max_bitrate;
211 uint32_t avg_bitrate;
212
213 /* 0x05 DecSpecificDescrTag */
214 uint8_t decoder_cfg_len;
215 uint8_t *decoder_cfg;
216
217 /* 0x06 SLConfigDescrTag */
218 uint8_t sl_config_len;
219 uint8_t *sl_config;
220 } MOV_esds_t;
221
222 struct MOVParseTableEntry;
223
224 typedef struct Time2Sample{
225 int count;
226 int duration;
227 }Time2Sample;
228
229 typedef struct MOVStreamContext {
230 int ffindex; /* the ffmpeg stream id */
231 int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */
232 long next_chunk;
233 long chunk_count;
234 int64_t *chunk_offsets;
235 int stts_count;
236 Time2Sample *stts_data;
237 int ctts_count;
238 Time2Sample *ctts_data;
239 int edit_count; /* number of 'edit' (elst atom) */
240 long sample_to_chunk_sz;
241 MOV_sample_to_chunk_tbl *sample_to_chunk;
242 long sample_to_chunk_index;
243 int sample_to_time_index;
244 long sample_to_time_sample;
245 uint64_t sample_to_time_time;
246 int sample_to_ctime_index;
247 int sample_to_ctime_sample;
248 long sample_size;
249 long sample_count;
250 long *sample_sizes;
251 long keyframe_count;
252 long *keyframes;
253 int time_scale;
254 long current_sample;
255 long left_in_chunk; /* how many samples before next chunk */
256 /* specific MPEG4 header which is added at the beginning of the stream */
257 unsigned int header_len;
258 uint8_t *header_data;
259 MOV_esds_t esds;
260 } MOVStreamContext;
261
262 typedef struct MOVContext {
263 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) */
264 AVFormatContext *fc;
265 int time_scale;
266 int duration; /* duration of the longest track */
267 int found_moov; /* when both 'moov' and 'mdat' sections has been found */
268 int found_mdat; /* we suppose we have enough data to read the file */
269 int64_t mdat_size;
270 int64_t mdat_offset;
271 int total_streams;
272 /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
273 * but we need the info to be able to skip data from those streams in the 'mdat' section
274 */
275 MOVStreamContext *streams[MAX_STREAMS];
276
277 int64_t next_chunk_offset;
278 MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */
279 int ctab_size;
280 MOV_ctab_t **ctab; /* color tables */
281 const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
282 /* NOTE: for recursion save to/ restore from local variable! */
283
284 AVPaletteControl palette_control;
285 } MOVContext;
286
287
288 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
289
290 /* those functions parse an atom */
291 /* return code:
292 1: found what I wanted, exit
293 0: continue to parse next atom
294 -1: error occured, exit
295 */
296 typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
297
298 /* links atom IDs to parse functions */
299 typedef struct MOVParseTableEntry {
300 uint32_t type;
301 mov_parse_function func;
302 } MOVParseTableEntry;
303
304 #ifdef DEBUG
305 /*
306 * XXX: static sux, even more in a multithreaded environment...
307 * Avoid them. This is here just to help debugging.
308 */
309 static int debug_indent = 0;
310 void print_atom(const char *str, MOV_atom_t atom)
311 {
312 unsigned int tag, i;
313 tag = (unsigned int) atom.type;
314 i=debug_indent;
315 if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
316 while(i--)
317 av_log(NULL, AV_LOG_DEBUG, "|");
318 av_log(NULL, AV_LOG_DEBUG, "parse:");
319 av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",
320 str, tag & 0xff,
321 (tag >> 8) & 0xff,
322 (tag >> 16) & 0xff,
323 (tag >> 24) & 0xff,
324 (unsigned int)atom.offset,
325 (unsigned int)atom.size);
326 assert((unsigned int)atom.size < 0x7fffffff);// catching errors
327 }
328 #else
329 #define print_atom(a,b)
330 #endif
331
332
333 static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
334 {
335 print_atom("leaf", atom);
336
337 if (atom.size>1)
338 url_fskip(pb, atom.size);
339 /* url_seek(pb, atom_offset+atom.size, SEEK_SET); */
340 return 0;
341 }
342
343 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
344 {
345 int64_t total_size = 0;
346 MOV_atom_t a;
347 int i;
348 int err = 0;
349
350 #ifdef DEBUG
351 print_atom("default", atom);
352 debug_indent++;
353 #endif
354
355 a.offset = atom.offset;
356
357 if (atom.size < 0)
358 atom.size = 0x7fffffffffffffffLL;
359 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
360 a.size = atom.size;
361 a.type=0L;
362 if(atom.size >= 8) {
363 a.size = get_be32(pb);
364 a.type = get_le32(pb);
365 }
366 total_size += 8;
367 a.offset += 8;
368 //av_log(NULL, AV_LOG_DEBUG, "type: %08x %.4s sz: %Lx %Lx %Lx\n", type, (char*)&type, size, atom.size, total_size);
369 if (a.size == 1) { /* 64 bit extended size */
370 a.size = get_be64(pb) - 8;
371 a.offset += 8;
372 total_size += 8;
373 }
374 if (a.size == 0) {
375 a.size = atom.size - total_size;
376 if (a.size <= 8)
377 break;
378 }
379 for (i = 0; c->parse_table[i].type != 0L
380 && c->parse_table[i].type != a.type; i++)
381 /* empty */;
382
383 a.size -= 8;
384
385 if(a.size < 0)
386 break;
387
388 // av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);
389 if (c->parse_table[i].type == 0) { /* skip leaf atoms data */
390 // url_seek(pb, atom.offset+atom.size, SEEK_SET);
391 #ifdef DEBUG
392 print_atom("unknown", a);
393 #endif
394 url_fskip(pb, a.size);
395 } else {
396 #ifdef DEBUG
397 //char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
398 //print_atom(b, type, offset, size);
399 #endif
400 err = (c->parse_table[i].func)(c, pb, a);
401 }
402
403 a.offset += a.size;
404 total_size += a.size;
405 }
406
407 if (!err && total_size < atom.size && atom.size < 0x7ffff) {
408 //av_log(NULL, AV_LOG_DEBUG, "RESET %Ld %Ld err:%d\n", atom.size, total_size, err);
409 url_fskip(pb, atom.size - total_size);
410 }
411
412 #ifdef DEBUG
413 debug_indent--;
414 #endif
415 return err;
416 }
417
418 static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
419 {
420 #if 1
421 url_fskip(pb, atom.size); // for now
422 #else
423 VERY VERY BROKEN, NEVER execute this, needs rewrite
424 unsigned int len;
425 MOV_ctab_t *t;
426 c->ctab = av_realloc(c->ctab, ++c->ctab_size);
427 t = c->ctab[c->ctab_size];
428 t->seed = get_be32(pb);
429 t->flags = get_be16(pb);
430 t->size = get_be16(pb) + 1;
431 len = 2 * t->size * 4;
432 if (len > 0) {
433 t->clrs = av_malloc(len); // 16bit A R G B
434 if (t->clrs)
435 get_buffer(pb, t->clrs, len);
436 }
437 #endif
438
439 return 0;
440 }
441
442 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
443 {
444 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
445 int len = 0;
446 uint32_t type;
447 uint32_t ctype;
448
449 print_atom("hdlr", atom);
450
451 get_byte(pb); /* version */
452 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
453
454 /* component type */
455 ctype = get_le32(pb);
456 type = get_le32(pb); /* component subtype */
457
458 #ifdef DEBUG
459 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);
460 av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
461 #endif
462 #ifdef DEBUG
463 /* XXX: yeah this is ugly... */
464 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
465 if(type == MKTAG('v', 'i', 'd', 'e'))
466 puts("hdlr: vide");
467 else if(type == MKTAG('s', 'o', 'u', 'n'))
468 puts("hdlr: soun");
469 } else if(ctype == 0) { /* MP4 */
470 if(type == MKTAG('v', 'i', 'd', 'e'))
471 puts("hdlr: vide");
472 else if(type == MKTAG('s', 'o', 'u', 'n'))
473 puts("hdlr: soun");
474 else if(type == MKTAG('o', 'd', 's', 'm'))
475 puts("hdlr: odsm");
476 else if(type == MKTAG('s', 'd', 's', 'm'))
477 puts("hdlr: sdsm");
478 } else puts("hdlr: meta");
479 #endif
480
481 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
482 /* helps parsing the string hereafter... */
483 c->mp4 = 0;
484 if(type == MKTAG('v', 'i', 'd', 'e'))
485 st->codec.codec_type = CODEC_TYPE_VIDEO;
486 else if(type == MKTAG('s', 'o', 'u', 'n'))
487 st->codec.codec_type = CODEC_TYPE_AUDIO;
488 } else if(ctype == 0) { /* MP4 */
489 /* helps parsing the string hereafter... */
490 c->mp4 = 1;
491 if(type == MKTAG('v', 'i', 'd', 'e'))
492 st->codec.codec_type = CODEC_TYPE_VIDEO;
493 else if(type == MKTAG('s', 'o', 'u', 'n'))
494 st->codec.codec_type = CODEC_TYPE_AUDIO;
495 }
496 get_be32(pb); /* component manufacture */
497 get_be32(pb); /* component flags */
498 get_be32(pb); /* component flags mask */
499
500 if(atom.size <= 24)
501 return 0; /* nothing left to read */
502 /* XXX: MP4 uses a C string, not a pascal one */
503 /* component name */
504
505 if(c->mp4) {
506 /* .mp4: C string */
507 while(get_byte(pb) && (++len < (atom.size - 24)));
508 } else {
509 /* .mov: PASCAL string */
510 #ifdef DEBUG
511 char* buf;
512 #endif
513 len = get_byte(pb);
514 #ifdef DEBUG
515 buf = (uint8_t*) av_malloc(len+1);
516 if (buf) {
517 get_buffer(pb, buf, len);
518 buf[len] = '\0';
519 av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf);
520 av_free(buf);
521 } else
522 #endif
523 url_fskip(pb, len);
524 }
525
526 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
527 return 0;
528 }
529
530 static int mov_mp4_read_descr_len(ByteIOContext *pb)
531 {
532 int len = 0;
533 int count = 4;
534 while (count--) {
535 int c = get_byte(pb);
536 len = (len << 7) | (c & 0x7f);
537 if (!(c & 0x80))
538 break;
539 }
540 return len;
541 }
542
543 static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)
544 {
545 int len;
546 *tag = get_byte(pb);
547 len = mov_mp4_read_descr_len(pb);
548 #ifdef DEBUG
549 av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
550 #endif
551 return len;
552 }
553
554 static inline unsigned int get_be24(ByteIOContext *s)
555 {
556 unsigned int val;
557 val = get_byte(s) << 16;
558 val |= get_byte(s) << 8;
559 val |= get_byte(s);
560 return val;
561 }
562
563 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
564 {
565 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
566 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
567 int64_t start_pos = url_ftell(pb);
568 int tag, len;
569
570 print_atom("esds", atom);
571
572 /* Well, broken but suffisant for some MP4 streams */
573 get_be32(pb); /* version + flags */
574 len = mov_mp4_read_descr(pb, &tag);
575 if (tag == MP4ESDescrTag) {
576 get_be16(pb); /* ID */
577 get_byte(pb); /* priority */
578 } else
579 get_be16(pb); /* ID */
580
581 len = mov_mp4_read_descr(pb, &tag);
582 if (tag == MP4DecConfigDescrTag) {
583 sc->esds.object_type_id = get_byte(pb);
584 sc->esds.stream_type = get_byte(pb);
585 sc->esds.buffer_size_db = get_be24(pb);
586 sc->esds.max_bitrate = get_be32(pb);
587 sc->esds.avg_bitrate = get_be32(pb);
588
589 len = mov_mp4_read_descr(pb, &tag);
590 //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);
591 if (tag == MP4DecSpecificDescrTag) {
592 #ifdef DEBUG
593 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
594 #endif
595 st->codec.extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
596 if (st->codec.extradata) {
597 get_buffer(pb, st->codec.extradata, len);
598 st->codec.extradata_size = len;
599 }
600 }
601 }
602 /* in any case, skip garbage */
603 url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
604 return 0;
605 }
606
607 /* this atom contains actual media data */
608 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
609 {
610 print_atom("mdat", atom);
611
612 if(atom.size == 0) /* wrong one (MP4) */
613 return 0;
614 c->found_mdat=1;
615 c->mdat_offset = atom.offset;
616 c->mdat_size = atom.size;
617 if(c->found_moov)
618 return 1; /* found both, just go */
619 url_fskip(pb, atom.size);
620 return 0; /* now go for moov */
621 }
622
623 /* this atom should contain all header atoms */
624 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
625 {
626 int err;
627
628 print_atom("moov", atom);
629
630 err = mov_read_default(c, pb, atom);
631 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
632 /* so we don't parse the whole file if over a network */
633 c->found_moov=1;
634 if(c->found_mdat)
635 return 1; /* found both, just go */
636 return 0; /* now go for mdat */
637 }
638
639
640 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
641 {
642 print_atom("mdhd", atom);
643
644 get_byte(pb); /* version */
645
646 get_byte(pb); get_byte(pb);
647 get_byte(pb); /* flags */
648
649 get_be32(pb); /* creation time */
650 get_be32(pb); /* modification time */
651
652 c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
653
654 #ifdef DEBUG
655 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 */
656 #endif
657 get_be32(pb); /* duration */
658
659 get_be16(pb); /* language */
660 get_be16(pb); /* quality */
661
662 return 0;
663 }
664
665 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
666 {
667 print_atom("mvhd", atom);
668
669 get_byte(pb); /* version */
670 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
671
672 get_be32(pb); /* creation time */
673 get_be32(pb); /* modification time */
674 c->time_scale = get_be32(pb); /* time scale */
675 #ifdef DEBUG
676 av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);
677 #endif
678 c->duration = get_be32(pb); /* duration */
679 get_be32(pb); /* preferred scale */
680
681 get_be16(pb); /* preferred volume */
682
683 url_fskip(pb, 10); /* reserved */
684
685 url_fskip(pb, 36); /* display matrix */
686
687 get_be32(pb); /* preview time */
688 get_be32(pb); /* preview duration */
689 get_be32(pb); /* poster time */
690 get_be32(pb); /* selection time */
691 get_be32(pb); /* selection duration */
692 get_be32(pb); /* current time */
693 get_be32(pb); /* next track ID */
694
695 return 0;
696 }
697
698 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
699 {
700 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
701
702 if((uint64_t)atom.size > (1<<30))
703 return -1;
704
705 // currently SVQ3 decoder expect full STSD header - so let's fake it
706 // this should be fixed and just SMI header should be passed
707 av_free(st->codec.extradata);
708 st->codec.extradata_size = 0x5a + atom.size;
709 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
710
711 if (st->codec.extradata) {
712 strcpy(st->codec.extradata, "SVQ3"); // fake
713 get_buffer(pb, st->codec.extradata + 0x5a, atom.size);
714 //av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld %s\n", atom.size, (char*)st->codec.extradata + 0x5a);
715 } else
716 url_fskip(pb, atom.size);
717
718 return 0;
719 }
720
721 static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
722 {
723 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
724
725 if((uint64_t)atom.size > (1<<30))
726 return -1;
727
728 av_free(st->codec.extradata);
729
730 st->codec.extradata_size = atom.size;
731 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
732
733 if (st->codec.extradata) {
734 get_buffer(pb, st->codec.extradata, atom.size);
735 } else
736 url_fskip(pb, atom.size);
737
738 return 0;
739 }
740
741 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
742 {
743 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
744 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
745 unsigned int i, entries;
746
747 print_atom("stco", atom);
748
749 get_byte(pb); /* version */
750 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
751
752 entries = get_be32(pb);
753
754 if(entries >= UINT_MAX/sizeof(int64_t))
755 return -1;
756
757 sc->chunk_count = entries;
758 sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));
759 if (!sc->chunk_offsets)
760 return -1;
761 if (atom.type == MKTAG('s', 't', 'c', 'o')) {
762 for(i=0; i<entries; i++) {
763 sc->chunk_offsets[i] = get_be32(pb);
764 }
765 } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
766 for(i=0; i<entries; i++) {
767 sc->chunk_offsets[i] = get_be64(pb);
768 }
769 } else
770 return -1;
771 #ifdef DEBUG
772 /*
773 for(i=0; i<entries; i++) {
774 av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
775 }
776 */
777 #endif
778 return 0;
779 }
780
781 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
782 {
783 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
784 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
785 int entries, frames_per_sample;
786 uint32_t format;
787 uint8_t codec_name[32];
788
789 /* for palette traversal */
790 int color_depth;
791 int color_start;
792 int color_count;
793 int color_end;
794 int color_index;
795 int color_dec;
796 int color_greyscale;
797 unsigned char *color_table;
798 int j;
799 unsigned char r, g, b;
800
801 print_atom("stsd", atom);
802
803 get_byte(pb); /* version */
804 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
805
806 entries = get_be32(pb);
807
808 while(entries--) { //Parsing Sample description table
809 enum CodecID id;
810 int size = get_be32(pb); /* size */
811 format = get_le32(pb); /* data format */
812
813 get_be32(pb); /* reserved */
814 get_be16(pb); /* reserved */
815 get_be16(pb); /* index */
816
817 /* for MPEG4: set codec type by looking for it */
818 id = codec_get_id(mov_video_tags, format);
819 if (id >= 0) {
820 AVCodec *codec;
821 codec = avcodec_find_decoder(id);
822 if (codec)
823 st->codec.codec_type = codec->type;
824 }
825 #ifdef DEBUG
826 av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n",
827 size,
828 (format >> 0) & 0xff,
829 (format >> 8) & 0xff,
830 (format >> 16) & 0xff,
831 (format >> 24) & 0xff,
832 st->codec.codec_type);
833 #endif
834 st->codec.codec_tag = format;
835 if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
836 MOV_atom_t a = { 0, 0, 0 };
837 st->codec.codec_id = id;
838 get_be16(pb); /* version */
839 get_be16(pb); /* revision level */
840 get_be32(pb); /* vendor */
841 get_be32(pb); /* temporal quality */
842 get_be32(pb); /* spacial quality */
843 st->codec.width = get_be16(pb); /* width */
844 st->codec.height = get_be16(pb); /* height */
845 #if 1
846 if (st->codec.codec_id == CODEC_ID_MPEG4) {
847 /* in some MPEG4 the width/height are not correct, so
848 we ignore this info */
849 st->codec.width = 0;
850 st->codec.height = 0;
851 }
852 #endif
853 get_be32(pb); /* horiz resolution */
854 get_be32(pb); /* vert resolution */
855 get_be32(pb); /* data size, always 0 */
856 frames_per_sample = get_be16(pb); /* frames per samples */
857 #ifdef DEBUG
858 av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);
859 #endif
860 get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
861 if (codec_name[0] <= 31) {
862 memcpy(st->codec.codec_name, &codec_name[1],codec_name[0]);
863 st->codec.codec_name[codec_name[0]] = 0;
864 }
865
866 st->codec.bits_per_sample = get_be16(pb); /* depth */
867 st->codec.color_table_id = get_be16(pb); /* colortable id */
868
869 /* These are set in mov_read_stts and might already be set!
870 st->codec.time_base.den = 25;
871 st->codec.time_base.num = 1;
872 */
873 size -= (16+8*4+2+32+2*2);
874 #if 0
875 while (size >= 8) {
876 MOV_atom_t a;
877 int64_t start_pos;
878
879 a.size = get_be32(pb);
880 a.type = get_le32(pb);
881 size -= 8;
882 #ifdef DEBUG
883 av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",
884 (a.type >> 0) & 0xff,
885 (a.type >> 8) & 0xff,
886 (a.type >> 16) & 0xff,
887 (a.type >> 24) & 0xff,
888 a.size, size);
889 #endif
890 start_pos = url_ftell(pb);
891
892 switch(a.type) {
893 case MKTAG('e', 's', 'd', 's'):
894 {
895 int tag, len;
896 /* Well, broken but suffisant for some MP4 streams */
897 get_be32(pb); /* version + flags */
898 len = mov_mp4_read_descr(pb, &tag);
899 if (tag == 0x03) {
900 /* MP4ESDescrTag */
901 get_be16(pb); /* ID */
902 get_byte(pb); /* priority */
903 len = mov_mp4_read_descr(pb, &tag);
904 if (tag != 0x04)
905 goto fail;
906 /* MP4DecConfigDescrTag */
907 get_byte(pb); /* objectTypeId */
908 get_be32(pb); /* streamType + buffer size */
909 get_be32(pb); /* max bit rate */
910 get_be32(pb); /* avg bit rate */
911 len = mov_mp4_read_descr(pb, &tag);
912 if (tag != 0x05)
913 goto fail;
914 /* MP4DecSpecificDescrTag */
915 #ifdef DEBUG
916 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
917 #endif
918 sc->header_data = av_mallocz(len);
919 if (sc->header_data) {
920 get_buffer(pb, sc->header_data, len);
921 sc->header_len = len;
922 }
923 }
924 /* in any case, skip garbage */
925 }
926 break;
927 default:
928 break;
929 }
930 fail:
931 av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld %d\n", atom.size, url_ftell(pb) - start_pos);
932 if (atom.size > 8) {
933 url_fskip(pb, (atom.size - 8) -
934 ((url_ftell(pb) - start_pos)));
935 size -= atom.size - 8;
936 }
937 }
938 if (size > 0) {
939 /* unknown extension */
940 url_fskip(pb, size);
941 }
942 #else
943
944 /* figure out the palette situation */
945 color_depth = st->codec.bits_per_sample & 0x1F;
946 color_greyscale = st->codec.bits_per_sample & 0x20;
947
948 /* if the depth is 2, 4, or 8 bpp, file is palettized */
949 if ((color_depth == 2) || (color_depth == 4) ||
950 (color_depth == 8)) {
951
952 if (color_greyscale) {
953
954 /* compute the greyscale palette */
955 color_count = 1 << color_depth;
956 color_index = 255;
957 color_dec = 256 / (color_count - 1);
958 for (j = 0; j < color_count; j++) {
959 r = g = b = color_index;
960 c->palette_control.palette[j] =
961 (r << 16) | (g << 8) | (b);
962 color_index -= color_dec;
963 if (color_index < 0)
964 color_index = 0;
965 }
966
967 } else if (st->codec.color_table_id & 0x08) {
968
969 /* if flag bit 3 is set, use the default palette */
970 color_count = 1 << color_depth;
971 if (color_depth == 2)
972 color_table = ff_qt_default_palette_4;
973 else if (color_depth == 4)
974 color_table = ff_qt_default_palette_16;
975 else
976 color_table = ff_qt_default_palette_256;
977
978 for (j = 0; j < color_count; j++) {
979 r = color_table[j * 4 + 0];
980 g = color_table[j * 4 + 1];
981 b = color_table[j * 4 + 2];
982 c->palette_control.palette[j] =
983 (r << 16) | (g << 8) | (b);
984 }
985
986 } else {
987
988 /* load the palette from the file */
989 color_start = get_be32(pb);
990 color_count = get_be16(pb);
991 color_end = get_be16(pb);
992 for (j = color_start; j <= color_end; j++) {
993 /* each R, G, or B component is 16 bits;
994 * only use the top 8 bits; skip alpha bytes
995 * up front */
996 get_byte(pb);
997 get_byte(pb);
998 r = get_byte(pb);
999 get_byte(pb);
1000 g = get_byte(pb);
1001 get_byte(pb);
1002 b = get_byte(pb);
1003 get_byte(pb);
1004 c->palette_control.palette[j] =
1005 (r << 16) | (g << 8) | (b);
1006 }
1007 }
1008
1009 st->codec.palctrl = &c->palette_control;
1010 st->codec.palctrl->palette_changed = 1;
1011 } else
1012 st->codec.palctrl = NULL;
1013
1014 a.size = size;
1015 mov_read_default(c, pb, a);
1016 #endif
1017 } else {
1018 st->codec.codec_id = codec_get_id(mov_audio_tags, format);
1019 if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244
1020 {
1021 #ifdef DEBUG
1022 av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");
1023 #endif
1024 get_be32(pb);get_be32(pb); //Reserved_8
1025 get_be16(pb);//Reserved_2
1026 get_be16(pb);//Reserved_2
1027 get_be32(pb);//Reserved_4
1028 get_be16(pb);//TimeScale
1029 get_be16(pb);//Reserved_2
1030
1031 //AMRSpecificBox.(10 bytes)
1032
1033 get_be32(pb); //size
1034 get_be32(pb); //type=='damr'
1035 get_be32(pb); //vendor
1036 get_byte(pb); //decoder version
1037 get_be16(pb); //mode_set
1038 get_byte(pb); //mode_change_period
1039 get_byte(pb); //frames_per_sample
1040
1041 st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames
1042 if(st->codec.codec_id==CODEC_ID_AMR_NB)
1043 {
1044 st->codec.sample_rate=8000;
1045 st->codec.channels=1;
1046 }
1047 else //AMR-WB
1048 {
1049 st->codec.sample_rate=16000;
1050 st->codec.channels=1;
1051 }
1052 st->codec.bits_per_sample=16;
1053 st->codec.bit_rate=0; /*It is not possible to tell this before we have
1054 an audio frame and even then every frame can be different*/
1055 }
1056 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))
1057 {
1058 //This is some stuff for the hint track, lets ignore it!
1059 //Do some mp4 auto detect.
1060 c->mp4=1;
1061 size-=(16);
1062 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
1063 }
1064 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))
1065 {
1066 MOV_atom_t a;
1067 int mp4_version;
1068
1069 /* Handle mp4 audio tag */
1070 mp4_version=get_be16(pb);/*version*/
1071 get_be16(pb); /*revesion*/
1072 get_be32(pb);
1073 st->codec.channels = get_be16(pb); /* channels */
1074 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */
1075 get_be32(pb);
1076 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */
1077 get_be16(pb);
1078 c->mp4=1;
1079
1080 if(mp4_version==1)
1081 {
1082 url_fskip(pb,16);
1083 a.size=size-(16+20+16);
1084 }
1085 else
1086 a.size=size-(16+20);
1087
1088 a.offset=url_ftell(pb);
1089
1090 mov_read_default(c, pb, a);
1091
1092 /* Get correct sample rate from extradata */
1093 if(st->codec.extradata_size) {
1094 const int samplerate_table[] = {
1095 96000, 88200, 64000, 48000, 44100, 32000,
1096 24000, 22050, 16000, 12000, 11025, 8000,
1097 7350, 0, 0, 0
1098 };
1099 unsigned char *px = st->codec.extradata;
1100 // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels
1101 int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);
1102 st->codec.sample_rate = samplerate_table[samplerate_index];
1103 st->codec.channels = (px[1] >> 3) & 15;
1104 }
1105 }
1106 else if( st->codec.codec_tag == MKTAG( 'a', 'l', 'a', 'c' ))
1107 {
1108 /* Handle alac audio tag + special extradata */
1109 get_be32(pb); /* version */
1110 get_be32(pb);
1111 st->codec.channels = get_be16(pb); /* channels */
1112 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */
1113 get_be32(pb);
1114 st->codec.sample_rate = get_be16(pb);
1115 get_be16(pb);
1116
1117 /* fetch the 36-byte extradata needed for alac decoding */
1118 st->codec.extradata_size = 36;
1119 st->codec.extradata = (uint8_t*)
1120 av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1121 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
1122 }
1123 else if(size>=(16+20))
1124 {//16 bytes read, reading atleast 20 more
1125 uint16_t version;
1126 #ifdef DEBUG
1127 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);
1128 #endif
1129 version = get_be16(pb); /* version */
1130 get_be16(pb); /* revision level */
1131 get_be32(pb); /* vendor */
1132
1133 st->codec.channels = get_be16(pb); /* channel count */
1134 st->codec.bits_per_sample = get_be16(pb); /* sample size */
1135
1136 /* handle specific s8 codec */
1137 get_be16(pb); /* compression id = 0*/
1138 get_be16(pb); /* packet size = 0 */
1139
1140 st->codec.sample_rate = ((get_be32(pb) >> 16));
1141 //av_log(NULL, AV_LOG_DEBUG, "CODECID %d %d %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
1142
1143 switch (st->codec.codec_id) {
1144 case CODEC_ID_PCM_S16BE:
1145 if (st->codec.bits_per_sample == 8)
1146 st->codec.codec_id = CODEC_ID_PCM_S8;
1147 /* fall */
1148 case CODEC_ID_PCM_U8:
1149 st->codec.bit_rate = st->codec.sample_rate * 8;
1150 break;
1151 default:
1152 ;
1153 }
1154
1155 //Read QT version 1 fields. In version 0 theese dont exist
1156 #ifdef DEBUG
1157 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);
1158 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));
1159 #endif
1160 if((version==1) && size>=(16+20+16))
1161 {
1162 get_be32(pb); /* samples per packet */
1163 get_be32(pb); /* bytes per packet */
1164 get_be32(pb); /* bytes per frame */
1165 get_be32(pb); /* bytes per sample */
1166 if(size>(16+20+16))
1167 {
1168 //Optional, additional atom-based fields
1169 MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
1170 #ifdef DEBUG
1171 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 ),
1172 (format >> 0) & 0xff,
1173 (format >> 8) & 0xff,
1174 (format >> 16) & 0xff,
1175 (format >> 24) & 0xff);
1176 #endif
1177 mov_read_default(c, pb, a);
1178 }
1179 }
1180 else
1181 {
1182 //We should be down to 0 bytes here, but lets make sure.
1183 size-=(16+20);
1184 #ifdef DEBUG
1185 if(size>0)
1186 av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));
1187 #endif
1188 url_fskip(pb, size);
1189 }
1190 }
1191 else
1192 {
1193 size-=16;
1194 //Unknown size, but lets do our best and skip the rest.
1195 #ifdef DEBUG
1196 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);
1197 #endif
1198 url_fskip(pb, size);
1199 }
1200 }
1201 }
1202
1203 return 0;
1204 }
1205
1206 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1207 {
1208 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1209 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1210 unsigned int i, entries;
1211
1212 print_atom("stsc", atom);
1213
1214 get_byte(pb); /* version */
1215 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1216
1217 entries = get_be32(pb);
1218
1219 if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))
1220 return -1;
1221
1222 #ifdef DEBUG
1223 av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1224 #endif
1225 sc->sample_to_chunk_sz = entries;
1226 sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
1227 if (!sc->sample_to_chunk)
1228 return -1;
1229 for(i=0; i<entries; i++) {
1230 sc->sample_to_chunk[i].first = get_be32(pb);
1231 sc->sample_to_chunk[i].count = get_be32(pb);
1232 sc->sample_to_chunk[i].id = get_be32(pb);
1233 #ifdef DEBUG
1234 /* 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); */
1235 #endif
1236 }
1237 return 0;
1238 }
1239
1240 static int mov_read_stss(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("stss", atom);
1247
1248 get_byte(pb); /* version */
1249 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1250
1251 entries = get_be32(pb);
1252
1253 if(entries >= UINT_MAX / sizeof(long))
1254 return -1;
1255
1256 sc->keyframe_count = entries;
1257 #ifdef DEBUG
1258 av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);
1259 #endif
1260 sc->keyframes = (long*) av_malloc(entries * sizeof(long));
1261 if (!sc->keyframes)
1262 return -1;
1263 for(i=0; i<entries; i++) {
1264 sc->keyframes[i] = get_be32(pb);
1265 #ifdef DEBUG
1266 /* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
1267 #endif
1268 }
1269 return 0;
1270 }
1271
1272 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1273 {
1274 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1275 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1276 unsigned int i, entries;
1277
1278 print_atom("stsz", atom);
1279
1280 get_byte(pb); /* version */
1281 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1282
1283 sc->sample_size = get_be32(pb);
1284 entries = get_be32(pb);
1285 if(entries >= UINT_MAX / sizeof(long))
1286 return -1;
1287
1288 sc->sample_count = entries;
1289 #ifdef DEBUG
1290 av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
1291 #endif
1292 if(sc->sample_size)
1293 return 0; /* there isn't any table following */
1294 sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));
1295 if (!sc->sample_sizes)
1296 return -1;
1297 for(i=0; i<entries; i++) {
1298 sc->sample_sizes[i] = get_be32(pb);
1299 #ifdef DEBUG
1300 av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);
1301 #endif
1302 }
1303 return 0;
1304 }
1305
1306 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1307 {
1308 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1309 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1310 unsigned int i, entries;
1311 int64_t duration=0;
1312 int64_t total_sample_count=0;
1313
1314 print_atom("stts", atom);
1315
1316 get_byte(pb); /* version */
1317 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1318 entries = get_be32(pb);
1319 if(entries >= UINT_MAX / sizeof(Time2Sample))
1320 return -1;
1321
1322 c->streams[c->fc->nb_streams-1]->stts_count = entries;
1323 c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));
1324
1325 #ifdef DEBUG
1326 av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1327 #endif
1328 for(i=0; i<entries; i++) {
1329 int sample_duration;
1330 int sample_count;
1331
1332 sample_count=get_be32(pb);
1333 sample_duration = get_be32(pb);
1334 c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;
1335 c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;
1336 #ifdef DEBUG
1337 av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1338 #endif
1339 duration+=sample_duration*sample_count;
1340 total_sample_count+=sample_count;
1341
1342 #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone
1343
1344 if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {
1345 st->codec.time_base.num = sample_duration ? sample_duration : 1;
1346 st->codec.time_base.den = c->streams[c->fc->nb_streams-1]->time_scale;
1347 #ifdef DEBUG
1348 av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.time_base.den, sample_duration);
1349 #endif
1350 }
1351 #endif
1352 }
1353
1354 /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/
1355 if(duration>0)
1356 {
1357 av_reduce(
1358 &st->codec.time_base.den,
1359 &st->codec.time_base.num,
1360 c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,
1361 duration,
1362 INT_MAX
1363 );
1364
1365 #ifdef DEBUG
1366 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.time_base.den/st->codec.time_base.num,total_sample_count,duration,c->streams[c->fc->nb_streams-1]->time_scale);
1367 #endif
1368 }
1369 else
1370 {
1371 st->codec.time_base.num = 1;
1372 st->codec.time_base.den = c->streams[c->fc->nb_streams-1]->time_scale;
1373 }
1374 return 0;
1375 }
1376
1377 static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1378 {
1379 // AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1380 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1381 unsigned int i, entries;
1382
1383 print_atom("ctts", atom);
1384
1385 get_byte(pb); /* version */
1386 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1387 entries = get_be32(pb);
1388 if(entries >= UINT_MAX / sizeof(Time2Sample))
1389 return -1;
1390
1391 c->streams[c->fc->nb_streams-1]->ctts_count = entries;
1392 c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));
1393
1394 // #ifdef DEBUG
1395 av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1396 // #endif
1397 for(i=0; i<entries; i++) {
1398 c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);
1399 c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);
1400 }
1401 return 0;
1402 }
1403
1404 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1405 {
1406 AVStream *st;
1407 MOVStreamContext *sc;
1408
1409 print_atom("trak", atom);
1410
1411 st = av_new_stream(c->fc, c->fc->nb_streams);
1412 if (!st) return -2;
1413 sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
1414 if (!sc) {
1415 av_free(st);
1416 return -1;
1417 }
1418
1419 sc->sample_to_chunk_index = -1;
1420 st->priv_data = sc;
1421 st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
1422 st->start_time = 0; /* XXX: check */
1423 st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;
1424 c->streams[c->fc->nb_streams-1] = sc;
1425
1426 return mov_read_default(c, pb, atom);
1427 }
1428
1429 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1430 {
1431 AVStream *st;
1432
1433 print_atom("tkhd", atom);
1434
1435 st = c->fc->streams[c->fc->nb_streams-1];
1436
1437 get_byte(pb); /* version */
1438
1439 get_byte(pb); get_byte(pb);
1440 get_byte(pb); /* flags */
1441 /*
1442 MOV_TRACK_ENABLED 0x0001
1443 MOV_TRACK_IN_MOVIE 0x0002
1444 MOV_TRACK_IN_PREVIEW 0x0004
1445 MOV_TRACK_IN_POSTER 0x0008
1446 */
1447
1448 get_be32(pb); /* creation time */
1449 get_be32(pb); /* modification time */
1450 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1451 get_be32(pb); /* reserved */
1452 st->start_time = 0; /* check */
1453 st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */
1454 get_be32(pb); /* reserved */
1455 get_be32(pb); /* reserved */
1456
1457 get_be16(pb); /* layer */
1458 get_be16(pb); /* alternate group */
1459 get_be16(pb); /* volume */
1460 get_be16(pb); /* reserved */
1461
1462 url_fskip(pb, 36); /* display matrix */
1463
1464 /* those are fixed-point */
1465 st->codec.width = get_be32(pb) >> 16; /* track width */
1466 st->codec.height = get_be32(pb) >> 16; /* track height */
1467
1468 return 0;
1469 }
1470
1471 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1472 /* like the files created with Adobe Premiere 5.0, for samples see */
1473 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1474 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1475 {
1476 int err;
1477
1478 #ifdef DEBUG
1479 print_atom("wide", atom);
1480 debug_indent++;
1481 #endif
1482 if (atom.size < 8)
1483 return 0; /* continue */
1484 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1485 url_fskip(pb, atom.size - 4);
1486 return 0;
1487 }
1488 atom.type = get_le32(pb);
1489 atom.offset += 8;
1490 atom.size -= 8;
1491 if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1492 url_fskip(pb, atom.size);
1493 return 0;
1494 }
1495 err = mov_read_mdat(c, pb, atom);
1496 #ifdef DEBUG
1497 debug_indent--;
1498 #endif
1499 return err;
1500 }
1501
1502
1503 #ifdef CONFIG_ZLIB
1504 static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
1505 {
1506 return -1;
1507 }
1508
1509 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1510 {
1511 ByteIOContext ctx;
1512 uint8_t *cmov_data;
1513 uint8_t *moov_data; /* uncompressed data */
1514 long cmov_len, moov_len;
1515 int ret;
1516
1517 print_atom("cmov", atom);
1518
1519 get_be32(pb); /* dcom atom */
1520 if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1521 return -1;
1522 if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1523 av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");
1524 return -1;
1525 }
1526 get_be32(pb); /* cmvd atom */
1527 if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1528 return -1;
1529 moov_len = get_be32(pb); /* uncompressed size */
1530 cmov_len = atom.size - 6 * 4;
1531
1532 cmov_data = (uint8_t *) av_malloc(cmov_len);
1533 if (!cmov_data)
1534 return -1;
1535 moov_data = (uint8_t *) av_malloc(moov_len);
1536 if (!moov_data) {
1537 av_free(cmov_data);
1538 return -1;
1539 }
1540 get_buffer(pb, cmov_data, cmov_len);
1541 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1542 return -1;
1543 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)
1544 return -1;
1545 ctx.buf_end = ctx.buffer + moov_len;
1546 atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1547 atom.offset = 0;
1548 atom.size = moov_len;
1549 #ifdef DEBUG
1550 { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1551 #endif
1552 ret = mov_read_default(c, &ctx, atom);
1553 av_free(moov_data);
1554 av_free(cmov_data);
1555
1556 return ret;
1557 }
1558 #endif
1559
1560 /* edit list atom */
1561 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1562 {
1563 int i, edit_count;
1564 print_atom("elst", atom);
1565
1566 get_byte(pb); /* version */
1567 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1568 edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */
1569
1570 for(i=0; i<edit_count; i++){
1571 get_be32(pb); /* Track duration */
1572 get_be32(pb); /* Media time */
1573 get_be32(pb); /* Media rate */
1574 }
1575 #ifdef DEBUG
1576 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);
1577 #endif
1578 return 0;
1579 }
1580
1581 static const MOVParseTableEntry mov_default_parse_table[] = {
1582 /* mp4 atoms */
1583 { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1584 { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
1585 { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
1586 { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1587 { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
1588 { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
1589 { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
1590 { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1591 { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1592 { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
1593 { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1594 { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
1595 { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
1596 { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
1597 { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1598 { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1599 { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1600 { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1601 { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1602 { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
1603 { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
1604 { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
1605 { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
1606 { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1607 { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
1608 { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
1609 { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
1610 { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
1611 { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
1612 { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1613 { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },
1614 { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1615 { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1616 { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
1617 { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1618 { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1619 { MKTAG( 's', 't', 's', 'h' ), mov_read_default },
1620 { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1621 { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1622 { MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1623 { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1624 { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1625 { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
1626 { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
1627 { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
1628 { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
1629 { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },
1630 { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
1631 { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },
1632 /* extra mp4 */
1633 { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
1634 /* QT atoms */
1635 { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
1636 { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
1637 { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
1638 { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
1639 { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1640 { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
1641 { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
1642 { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
1643 { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
1644 { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
1645 { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
1646 { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
1647 { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
1648 { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
1649 { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
1650 { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1651 //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
1652 #ifdef CONFIG_ZLIB
1653 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1654 #else
1655 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
1656 #endif
1657 { 0L, mov_read_leaf }
1658 };
1659
1660 static void mov_free_stream_context(MOVStreamContext *sc)
1661 {
1662 if(sc) {
1663 av_freep(&sc->chunk_offsets);
1664 av_freep(&sc->sample_to_chunk);
1665 av_freep(&sc->sample_sizes);
1666 av_freep(&sc->keyframes);
1667 av_freep(&sc->header_data);
1668 av_freep(&sc->stts_data);
1669 av_freep(&sc->ctts_data);
1670 av_freep(&sc);
1671 }
1672 }
1673
1674 static inline uint32_t mov_to_tag(uint8_t *buf)
1675 {
1676 return MKTAG(buf[0], buf[1], buf[2], buf[3]);
1677 }
1678
1679 static inline uint32_t to_be32(uint8_t *buf)
1680 {
1681 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
1682 }
1683
1684 /* XXX: is it sufficient ? */
1685 static int mov_probe(AVProbeData *p)
1686 {
1687 unsigned int offset;
1688 uint32_t tag;
1689 int score = 0;
1690
1691 /* check file header */
1692 if (p->buf_size <= 12)
1693 return 0;
1694 offset = 0;
1695 for(;;) {
1696 /* ignore invalid offset */
1697 if ((offset + 8) > (unsigned int)p->buf_size)
1698 return score;
1699 tag = mov_to_tag(p->buf + offset + 4);
1700 switch(tag) {
1701 /* check for obvious tags */
1702 case MKTAG( 'm', 'o', 'o', 'v' ):
1703 case MKTAG( 'm', 'd', 'a', 't' ):
1704 case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1705 case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1706 return AVPROBE_SCORE_MAX;
1707 /* those are more common words, so rate then a bit less */
1708 case MKTAG( 'w', 'i', 'd', 'e' ):
1709 case MKTAG( 'f', 'r', 'e', 'e' ):
1710 case MKTAG( 'j', 'u', 'n', 'k' ):
1711 case MKTAG( 'p', 'i', 'c', 't' ):
1712 return AVPROBE_SCORE_MAX - 5;
1713 case MKTAG( 'f', 't', 'y', 'p' ):
1714 case MKTAG( 's', 'k', 'i', 'p' ):
1715 case MKTAG( 'u', 'u', 'i', 'd' ):
1716 offset = to_be32(p->buf+offset) + offset;
1717 /* if we only find those cause probedata is too small at least rate them */
1718 score = AVPROBE_SCORE_MAX - 50;
1719 break;
1720 default:
1721 /* unrecognized tag */
1722 return score;
1723 }
1724 }
1725 return score;
1726 }
1727
1728 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1729 {
1730 MOVContext *mov = (MOVContext *) s->priv_data;
1731 ByteIOContext *pb = &s->pb;
1732 int i, j, nb, err;
1733 MOV_atom_t atom = { 0, 0, 0 };
1734
1735 mov->fc = s;
1736 mov->parse_table = mov_default_parse_table;
1737 #if 0
1738 /* XXX: I think we should auto detect */
1739 if(s->iformat->name[1] == 'p')
1740 mov->mp4 = 1;
1741 #endif
1742 if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1743 atom.size = url_fsize(pb);
1744 else
1745 atom.size = 0x7FFFFFFFFFFFFFFFLL;
1746
1747 #ifdef DEBUG
1748 av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);
1749 #endif
1750
1751 /* check MOV header */
1752 err = mov_read_default(mov, pb, atom);
1753 if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1754 av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",
1755 err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1756 return -1;
1757 }
1758 #ifdef DEBUG
1759 av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1760 #endif
1761 /* some cleanup : make sure we are on the mdat atom */
1762 if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
1763 url_fseek(pb, mov->mdat_offset, SEEK_SET);
1764
1765 mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
1766
1767 #ifdef DEBUG
1768 av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));
1769 #endif
1770
1771 #ifdef DEBUG
1772 av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);
1773 #endif
1774 mov->total_streams = nb = s->nb_streams;
1775
1776 #if 1
1777 for(i=0; i<s->nb_streams;) {
1778 if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
1779 av_free(s->streams[i]);
1780 for(j=i+1; j<s->nb_streams; j++)
1781 s->streams[j-1] = s->streams[j];
1782 s->nb_streams--;
1783 } else
1784 i++;
1785 }
1786 for(i=0; i<s->nb_streams;i++) {
1787 MOVStreamContext *sc;
1788 sc = (MOVStreamContext *)s->streams[i]->priv_data;
1789 sc->ffindex = i;
1790 sc->is_ff_stream = 1;
1791 }
1792 #endif
1793 #ifdef DEBUG
1794 av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);
1795 #endif
1796 return 0;
1797 }
1798
1799 /* Yes, this is ugly... I didn't write the specs of QT :p */
1800 /* XXX:remove useless commented code sometime */
1801 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1802 {
1803 MOVContext *mov = (MOVContext *) s->priv_data;
1804 MOVStreamContext *sc;
1805 int64_t offset = 0x0FFFFFFFFFFFFFFFLL;
1806 int i, a, b, m;
1807 int size;
1808 int idx;
1809 size = 0x0FFFFFFF;
1810
1811 #ifdef MOV_SPLIT_CHUNKS
1812 if (mov->partial) {
1813 sc = mov->partial;
1814 idx = sc->sample_to_chunk_index;
1815
1816 if (idx < 0) return 0;
1817 #ifdef DEBUG
1818 fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);
1819 #endif
1820 //size = sc->sample_sizes[sc->current_sample];
1821 // that ain't working...
1822 //size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];
1823 size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];
1824
1825 sc->current_sample++;
1826 sc->left_in_chunk--;
1827
1828 if (sc->left_in_chunk <= 0)
1829 mov->partial = 0;
1830 offset = mov->next_chunk_offset;
1831 /* extract the sample */
1832
1833 goto readchunk;
1834 }
1835 #endif
1836
1837 again:
1838 sc = 0;
1839 for(i=0; i<mov->total_streams; i++) {
1840 MOVStreamContext *msc = mov->streams[i];
1841 //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));
1842 if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0
1843 && (msc->chunk_offsets[msc->next_chunk] < offset)) {
1844 sc = msc;
1845 offset = msc->chunk_offsets[msc->next_chunk];
1846 //av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
1847 }
1848 }
1849 if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)
1850 return -1;
1851
1852 sc->next_chunk++;
1853
1854 if(mov->next_chunk_offset < offset) { /* some meta data */
1855 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1856 mov->next_chunk_offset = offset;
1857 }
1858
1859 //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
1860 if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {
1861 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1862 mov->next_chunk_offset = offset;
1863 offset = 0x0FFFFFFFFFFFFFFFLL;
1864 goto again;
1865 }
1866
1867 /* now get the chunk size... */
1868
1869 for(i=0; i<mov->total_streams; i++) {
1870 MOVStreamContext *msc = mov->streams[i];
1871 if ((msc->next_chunk < msc->chunk_count)
1872 && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))
1873 size = msc->chunk_offsets[msc->next_chunk] - offset;
1874 }
1875
1876 #ifdef MOV_MINOLTA_FIX
1877 //Make sure that size is according to sample_size (Needed by .mov files
1878 //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
1879 //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
1880 //but I have no such movies
1881 if (sc->sample_size > 0) {
1882 int foundsize=0;
1883 for(i=0; i<(sc->sample_to_chunk_sz); i++) {
1884 if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )
1885 {
1886 // I can't figure out why for PCM audio sample_size is always 1
1887 // (it should actually be channels*bits_per_second/8) but it is.
1888 AVCodecContext* cod = &s->streams[sc->ffindex]->codec;
1889 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))
1890 foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
1891 else
1892 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;
1893 }
1894 #ifdef DEBUG
1895 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);
1896 #endif
1897 }
1898 if( (foundsize>0) && (foundsize<size) )
1899 {
1900 #ifdef DEBUG
1901 /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/
1902 #endif
1903 size=foundsize;
1904 }
1905 }
1906 #endif //MOV_MINOLTA_FIX
1907
1908 #ifdef MOV_SPLIT_CHUNKS
1909 /* split chunks into samples */
1910 if (sc->sample_size == 0) {
1911 idx = sc->sample_to_chunk_index;
1912 if ((idx + 1 < sc->sample_to_chunk_sz)
1913 && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))
1914 idx++;
1915 sc->sample_to_chunk_index = idx;
1916 if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {
1917 mov->partial = sc;
1918 /* we'll have to get those samples before next chunk */
1919 sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
1920 size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];
1921 }
1922
1923 sc->current_sample++;
1924 }
1925 #endif
1926
1927 readchunk:
1928 #ifdef DEBUG
1929 av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);
1930 #endif
1931 if(size == 0x0FFFFFFF)
1932 size = mov->mdat_size + mov->mdat_offset - offset;
1933 if(size < 0)
1934 return -1;
1935 if(size == 0)
1936 return -1;
1937 url_fseek(&s->pb, offset, SEEK_SET);
1938
1939 //av_log(NULL, AV_LOG_DEBUG, "READCHUNK hlen: %d %d off: %Ld pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));
1940 if (sc->header_len > 0) {
1941 av_new_packet(pkt, size + sc->header_len);
1942 memcpy(pkt->data, sc->header_data, sc->header_len);
1943 get_buffer(&s->pb, pkt->data + sc->header_len, size);
1944 /* free header */
1945 av_freep(&sc->header_data);
1946 sc->header_len = 0;
1947 } else {
1948 av_new_packet(pkt, size);
1949 get_buffer(&s->pb, pkt->data, pkt->size);
1950 }
1951 pkt->stream_index = sc->ffindex;
1952
1953 // If the keyframes table exists, mark any samples that are in the table as key frames.
1954 // If no table exists, treat very sample as a key frame.
1955 if (sc->keyframes) {
1956 a = 0;
1957 b = sc->keyframe_count - 1;
1958
1959 while (a < b) {
1960 m = (a + b + 1) >> 1;
1961 if (sc->keyframes[m] > sc->current_sample) {
1962 b = m - 1;
1963 } else {
1964 a = m;
1965 }
1966 }
1967
1968 if (sc->keyframes[a] == sc->current_sample)
1969 pkt->flags |= PKT_FLAG_KEY;
1970 }
1971 else
1972 pkt->flags |= PKT_FLAG_KEY;
1973
1974 #ifdef DEBUG
1975 /*
1976 av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);
1977 for(i=0; i<8; i++)
1978 av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);
1979 for(i=0; i<8; i++)
1980 av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);
1981 av_log(NULL, AV_LOG_DEBUG, "\n");
1982 */
1983 #endif
1984
1985 mov->next_chunk_offset = offset + size;
1986
1987 /* find the corresponding dts */
1988 if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {
1989 unsigned int count;
1990 uint64_t dts, pts;
1991 unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;
1992 count = sc->stts_data[sc->sample_to_time_index].count;
1993 if ((sc->sample_to_time_sample + count) < sc->current_sample) {
1994 sc->sample_to_time_sample += count;
1995 sc->sample_to_time_time += count*duration;
1996 sc->sample_to_time_index ++;
1997 duration = sc->stts_data[sc->sample_to_time_index].duration;
1998 }
1999 dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;
2000 /* find the corresponding pts */
2001 if (sc->sample_to_ctime_index < sc->ctts_count) {
2002 int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
2003 int count = sc->ctts_data[sc->sample_to_ctime_index].count;
2004
2005 if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {
2006 sc->sample_to_ctime_sample += count;
2007 sc->sample_to_ctime_index ++;
2008 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
2009 }
2010 pts = dts + duration;
2011 }else
2012 pts = dts;
2013 pkt->pts = av_rescale( pts,
2014 (int64_t)s->streams[sc->ffindex]->time_base.den,
2015 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
2016 pkt->dts = av_rescale( dts,
2017 (int64_t)s->streams[sc->ffindex]->time_base.den,
2018 (int64_t)sc->time_scale * (int64_t)s->streams[sc->ffindex]->time_base.num );
2019 #ifdef DEBUG
2020 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"
2021 , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
2022 , sc->sample_to_time_sample
2023 , sc->sample_to_time_time
2024 , sc->sample_to_time_index
2025 , sc->stts_count
2026 , count
2027 , duration);
2028 #endif
2029 }
2030
2031 return 0;
2032 }
2033
2034 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2035 /**
2036 * Seek method based on the one described in the Appendix C of QTFileFormat.pdf
2037 */
2038 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2039 {
2040 MOVContext* mov = (MOVContext *) s->priv_data;
2041 MOVStreamContext* sc;
2042 int32_t i, a, b, m;
2043 int64_t sample_time;
2044 int64_t start_time;
2045 int32_t seek_sample, sample;
2046 int32_t duration;
2047 int32_t count;
2048 int32_t chunk;
2049 int32_t left_in_chunk;
2050 int64_t chunk_file_offset;
2051 int64_t sample_file_offset;
2052 int32_t first_chunk_sample;
2053 int32_t sample_to_chunk_idx;
2054 int sample_to_time_index;
2055 long sample_to_time_sample = 0;
2056 uint64_t sample_to_time_time = 0;
2057 int mov_idx;
2058
2059 // Find the corresponding mov stream
2060 for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)
2061 if (mov->streams[mov_idx]->ffindex == stream_index)
2062 break;
2063 if (mov_idx == mov->total_streams) {
2064 av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
2065 return -1;
2066 }
2067 sc = mov->streams[mov_idx];
2068
2069 // Step 1. Find the edit that contains the requested time (elst)
2070 if (sc->edit_count) {
2071 // FIXME should handle edit list
2072 av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
2073 return -1;
2074 }
2075
2076 // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
2077 #ifdef DEBUG
2078 av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);
2079 #endif
2080 // convert timestamp from time_base unit to timescale unit
2081 sample_time = av_rescale( timestamp,
2082 (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,
2083 (int64_t)s->streams[stream_index]->time_base.den);
2084 start_time = 0; // FIXME use elst atom
2085 sample = 1; // sample are 0 based in table
2086 #ifdef DEBUG
2087 av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);
2088 #endif
2089 for (i = 0; i < sc->stts_count; i++) {
2090 count = sc->stts_data[i].count;
2091 duration = sc->stts_data[i].duration;
2092 //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);
2093 //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);
2094 if ((start_time + count*duration) > sample_time) {
2095 sample_to_time_time = start_time;
2096 sample_to_time_index = i;
2097 sample_to_time_sample = sample;
2098 sample += (sample_time - start_time) / duration;
2099 break;
2100 }
2101 sample += count;
2102 start_time += count * duration;
2103 }
2104 sample_to_time_time = start_time;
2105 sample_to_time_index = i;
2106 /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
2107 is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
2108
2109 #ifdef DEBUG
2110 av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);
2111 #endif
2112 if (sample > sc->sample_count) {
2113 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);
2114 return -1;
2115 }
2116
2117 // Step 3. Find the prior sync. sample using the Sync sample atom (stss)
2118 if (sc->keyframes) {
2119 a = 0;
2120 b = sc->keyframe_count - 1;
2121 while (a < b) {
2122 m = (a + b + 1) >> 1;
2123 if (sc->keyframes[m] > sample) {
2124 b = m - 1;
2125 } else {
2126 a = m;
2127 }
2128 #ifdef DEBUG
2129 // 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);
2130 #endif
2131 }
2132 // for low latency prob: always use the previous keyframe, just uncomment the next line
2133 // if (a) a--;
2134 seek_sample = sc->keyframes[a];
2135 }
2136 else
2137 seek_sample = sample; // else all samples are key frames
2138 #ifdef DEBUG
2139 av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);
2140 #endif
2141
2142 // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
2143 for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {
2144 b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
2145 if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
2146 break;
2147 first_chunk_sample += b;
2148 }
2149 chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;
2150 left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;
2151 first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;
2152 sample_to_chunk_idx = i;
2153 #ifdef DEBUG
2154 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);
2155 #endif
2156
2157 // Step 5. Find the offset of the chunk using the chunk offset atom
2158 if (!sc->chunk_offsets) {
2159 av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
2160 return -1;
2161 }
2162 if (chunk > sc->chunk_count) {
2163 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);
2164 return -1;
2165 }
2166 chunk_file_offset = sc->chunk_offsets[chunk - 1];
2167 #ifdef DEBUG
2168 av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);
2169 #endif
2170
2171 // Step 6. Find the byte offset within the chunk using the sample size atom
2172 sample_file_offset = chunk_file_offset;
2173 if (sc->sample_size)
2174 sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;
2175 else {
2176 for (i = 0; i < (seek_sample - first_chunk_sample); i++) {
2177 sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
2178 }
2179 }
2180 #ifdef DEBUG
2181 av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);
2182 #endif
2183
2184 // Step 6. Update the parser
2185 mov->partial = sc;
2186 mov->next_chunk_offset = sample_file_offset;
2187 // Update current stream state
2188 sc->current_sample = seek_sample - 1; // zero based
2189 sc->left_in_chunk = left_in_chunk;
2190 sc->next_chunk = chunk; // +1 -1 (zero based)
2191 sc->sample_to_chunk_index = sample_to_chunk_idx;
2192
2193 // Update other streams
2194 for (i = 0; i<mov->total_streams; i++) {
2195 MOVStreamContext *msc;
2196 if (i == mov_idx) continue;
2197 // Find the nearest 'next' chunk
2198 msc = mov->streams[i];
2199 a = 0;
2200 b = msc->chunk_count - 1;
2201 while (a < b) {
2202 m = (a + b + 1) >> 1;
2203 if (msc->chunk_offsets[m] > chunk_file_offset) {
2204 b = m - 1;
2205 } else {
2206 a = m;
2207 }
2208 #ifdef DEBUG
2209 /* av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"
2210 , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m], i); */
2211 #endif
2212 }
2213 msc->next_chunk = a;
2214 if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))
2215 msc->next_chunk ++;
2216 #ifdef DEBUG
2217 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]);
2218 #endif
2219 // Compute sample count and index in the sample_to_chunk table (what a pity)
2220 msc->sample_to_chunk_index = 0;
2221 msc->current_sample = 0;
2222 for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)
2223 && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {
2224 msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
2225 * msc->sample_to_chunk[msc->sample_to_chunk_index].count;
2226 }
2227 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;
2228 msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
2229 // Find corresponding position in stts (used later to compute dts)
2230 sample = 0;
2231 start_time = 0;
2232 for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {
2233 count = msc->stts_data[msc->sample_to_time_index].count;
2234 duration = msc->stts_data[msc->sample_to_time_index].duration;
2235 if ((sample + count - 1) > msc->current_sample) {
2236 msc->sample_to_time_time = start_time;
2237 msc->sample_to_time_sample = sample;
2238 break;
2239 }
2240 sample += count;
2241 start_time += count * duration;
2242 }
2243 sample = 0;
2244 for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {
2245 count = msc->ctts_data[msc->sample_to_ctime_index].count;
2246 duration = msc->ctts_data[msc->sample_to_ctime_index].duration;
2247 if ((sample + count - 1) > msc->current_sample) {
2248 msc->sample_to_ctime_sample = sample;
2249 break;
2250 }
2251 sample += count;
2252 }
2253 #ifdef DEBUG
2254 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);
2255 #endif
2256 }
2257 return 0;
2258 }
2259 #endif
2260
2261 static int mov_read_close(AVFormatContext *s)
2262 {
2263 int i;
2264 MOVContext *mov = (MOVContext *) s->priv_data;
2265 for(i=0; i<mov->total_streams; i++)
2266 mov_free_stream_context(mov->streams[i]);
2267 /* free color tabs */
2268 for(i=0; i<mov->ctab_size; i++)
2269 av_freep(&mov->ctab[i]);
2270 av_freep(&mov->ctab);
2271 return 0;
2272 }
2273
2274 static AVInputFormat mov_iformat = {
2275 "mov,mp4,m4a,3gp,3g2",
2276 "QuickTime/MPEG4 format",
2277 sizeof(MOVContext),
2278 mov_probe,
2279 mov_read_header,
2280 mov_read_packet,
2281 mov_read_close,
2282 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2283 mov_read_seek,
2284 #endif
2285 };
2286
2287 int mov_init(void)
2288 {
2289 av_register_input_format(&mov_iformat);
2290 return 0;
2291 }