mov_read_elst fix, based upon a patch by (Sebastien Bechet <s.bechet at av7 dot net>)
[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/PDF/QTFileFormat.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_NONE, 0 },
119 };
120
121 static const CodecTag mov_audio_tags[] = {
122 /* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */
123 { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
124 /* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */
125 { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
126 { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
127 { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
128 { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
129 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
130 { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
131 { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
132
133 { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
134 { CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */
135 { CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */
136 /* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
137 /* MP4 tags */
138 { CODEC_ID_MPEG4AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
139 /* The standard for mpeg4 audio is still not normalised AFAIK anyway */
140 { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
141 { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
142 { CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */
143 { CODEC_ID_NONE, 0 },
144 };
145
146 /* the QuickTime file format is quite convoluted...
147 * it has lots of index tables, each indexing something in another one...
148 * Here we just use what is needed to read the chunks
149 */
150
151 typedef struct MOV_sample_to_chunk_tbl {
152 long first;
153 long count;
154 long id;
155 } MOV_sample_to_chunk_tbl;
156
157 typedef struct {
158 uint32_t type;
159 int64_t offset;
160 int64_t size; /* total size (excluding the size and type fields) */
161 } MOV_atom_t;
162
163 typedef struct {
164 int seed;
165 int flags;
166 int size;
167 void* clrs;
168 } MOV_ctab_t;
169
170 typedef struct {
171 uint8_t version;
172 uint32_t flags; // 24bit
173
174 /* 0x03 ESDescrTag */
175 uint16_t es_id;
176 #define MP4ODescrTag 0x01
177 #define MP4IODescrTag 0x02
178 #define MP4ESDescrTag 0x03
179 #define MP4DecConfigDescrTag 0x04
180 #define MP4DecSpecificDescrTag 0x05
181 #define MP4SLConfigDescrTag 0x06
182 #define MP4ContentIdDescrTag 0x07
183 #define MP4SupplContentIdDescrTag 0x08
184 #define MP4IPIPtrDescrTag 0x09
185 #define MP4IPMPPtrDescrTag 0x0A
186 #define MP4IPMPDescrTag 0x0B
187 #define MP4RegistrationDescrTag 0x0D
188 #define MP4ESIDIncDescrTag 0x0E
189 #define MP4ESIDRefDescrTag 0x0F
190 #define MP4FileIODescrTag 0x10
191 #define MP4FileODescrTag 0x11
192 #define MP4ExtProfileLevelDescrTag 0x13
193 #define MP4ExtDescrTagsStart 0x80
194 #define MP4ExtDescrTagsEnd 0xFE
195 uint8_t stream_priority;
196
197 /* 0x04 DecConfigDescrTag */
198 uint8_t object_type_id;
199 uint8_t stream_type;
200 /* XXX: really streamType is
201 * only 6bit, followed by:
202 * 1bit upStream
203 * 1bit reserved
204 */
205 uint32_t buffer_size_db; // 24
206 uint32_t max_bitrate;
207 uint32_t avg_bitrate;
208
209 /* 0x05 DecSpecificDescrTag */
210 uint8_t decoder_cfg_len;
211 uint8_t *decoder_cfg;
212
213 /* 0x06 SLConfigDescrTag */
214 uint8_t sl_config_len;
215 uint8_t *sl_config;
216 } MOV_esds_t;
217
218 struct MOVParseTableEntry;
219
220 typedef struct MOVStreamContext {
221 int ffindex; /* the ffmpeg stream id */
222 int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */
223 long next_chunk;
224 long chunk_count;
225 int64_t *chunk_offsets;
226 int32_t stts_count;
227 uint64_t *stts_data; /* concatenated data from the time-to-sample atom (count|duration) */
228 int32_t edit_count; /* number of 'edit' (elst atom) */
229 long sample_to_chunk_sz;
230 MOV_sample_to_chunk_tbl *sample_to_chunk;
231 long sample_to_chunk_index;
232 long sample_size;
233 long sample_count;
234 long *sample_sizes;
235 long keyframe_count;
236 long *keyframes;
237 int time_scale;
238 long current_sample;
239 long left_in_chunk; /* how many samples before next chunk */
240 /* specific MPEG4 header which is added at the beginning of the stream */
241 int header_len;
242 uint8_t *header_data;
243 MOV_esds_t esds;
244 } MOVStreamContext;
245
246 typedef struct MOVContext {
247 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) */
248 AVFormatContext *fc;
249 int time_scale;
250 int duration; /* duration of the longest track */
251 int found_moov; /* when both 'moov' and 'mdat' sections has been found */
252 int found_mdat; /* we suppose we have enough data to read the file */
253 int64_t mdat_size;
254 int64_t mdat_offset;
255 int total_streams;
256 /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
257 * but we need the info to be able to skip data from those streams in the 'mdat' section
258 */
259 MOVStreamContext *streams[MAX_STREAMS];
260
261 int64_t next_chunk_offset;
262 MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */
263 int ctab_size;
264 MOV_ctab_t **ctab; /* color tables */
265 const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
266 /* NOTE: for recursion save to/ restore from local variable! */
267
268 AVPaletteControl palette_control;
269 } MOVContext;
270
271
272 /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
273
274 /* those functions parse an atom */
275 /* return code:
276 1: found what I wanted, exit
277 0: continue to parse next atom
278 -1: error occured, exit
279 */
280 typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
281
282 /* links atom IDs to parse functions */
283 typedef struct MOVParseTableEntry {
284 uint32_t type;
285 mov_parse_function func;
286 } MOVParseTableEntry;
287
288 #ifdef DEBUG
289 /*
290 * XXX: static sux, even more in a multithreaded environment...
291 * Avoid them. This is here just to help debugging.
292 */
293 static int debug_indent = 0;
294 void print_atom(const char *str, MOV_atom_t atom)
295 {
296 unsigned int tag, i;
297 tag = (unsigned int) atom.type;
298 i=debug_indent;
299 if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
300 while(i--)
301 av_log(NULL, AV_LOG_DEBUG, "|");
302 av_log(NULL, AV_LOG_DEBUG, "parse:");
303 av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",
304 str, tag & 0xff,
305 (tag >> 8) & 0xff,
306 (tag >> 16) & 0xff,
307 (tag >> 24) & 0xff,
308 (unsigned int)atom.offset,
309 (unsigned int)atom.size);
310 assert((unsigned int)atom.size < 0x7fffffff);// catching errors
311 }
312 #else
313 #define print_atom(a,b)
314 #endif
315
316
317 static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
318 {
319 print_atom("leaf", atom);
320
321 if (atom.size>1)
322 url_fskip(pb, atom.size);
323 /* url_seek(pb, atom_offset+atom.size, SEEK_SET); */
324 return 0;
325 }
326
327 static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
328 {
329 int64_t total_size = 0;
330 MOV_atom_t a;
331 int i;
332 int err = 0;
333
334 #ifdef DEBUG
335 print_atom("default", atom);
336 debug_indent++;
337 #endif
338
339 a.offset = atom.offset;
340
341 if (atom.size < 0)
342 atom.size = 0x7fffffffffffffffLL;
343 while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
344 a.size = atom.size;
345 a.type=0L;
346 if(atom.size >= 8) {
347 a.size = get_be32(pb);
348 a.type = get_le32(pb);
349 }
350 total_size += 8;
351 a.offset += 8;
352 //av_log(NULL, AV_LOG_DEBUG, "type: %08x %.4s sz: %Lx %Lx %Lx\n", type, (char*)&type, size, atom.size, total_size);
353 if (a.size == 1) { /* 64 bit extended size */
354 a.size = get_be64(pb) - 8;
355 a.offset += 8;
356 total_size += 8;
357 }
358 if (a.size == 0) {
359 a.size = atom.size - total_size;
360 if (a.size <= 8)
361 break;
362 }
363 for (i = 0; c->parse_table[i].type != 0L
364 && c->parse_table[i].type != a.type; i++)
365 /* empty */;
366
367 a.size -= 8;
368 // av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);
369 if (c->parse_table[i].type == 0) { /* skip leaf atoms data */
370 // url_seek(pb, atom.offset+atom.size, SEEK_SET);
371 #ifdef DEBUG
372 print_atom("unknown", a);
373 #endif
374 url_fskip(pb, a.size);
375 } else {
376 #ifdef DEBUG
377 //char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
378 //print_atom(b, type, offset, size);
379 #endif
380 err = (c->parse_table[i].func)(c, pb, a);
381 }
382
383 a.offset += a.size;
384 total_size += a.size;
385 }
386
387 if (!err && total_size < atom.size && atom.size < 0x7ffff) {
388 //av_log(NULL, AV_LOG_DEBUG, "RESET %Ld %Ld err:%d\n", atom.size, total_size, err);
389 url_fskip(pb, atom.size - total_size);
390 }
391
392 #ifdef DEBUG
393 debug_indent--;
394 #endif
395 return err;
396 }
397
398 static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
399 {
400 unsigned int len;
401 MOV_ctab_t *t;
402 //url_fskip(pb, atom.size); // for now
403 c->ctab = av_realloc(c->ctab, ++c->ctab_size);
404 t = c->ctab[c->ctab_size];
405 t->seed = get_be32(pb);
406 t->flags = get_be16(pb);
407 t->size = get_be16(pb) + 1;
408 len = 2 * t->size * 4;
409 if (len > 0) {
410 t->clrs = av_malloc(len); // 16bit A R G B
411 if (t->clrs)
412 get_buffer(pb, t->clrs, len);
413 }
414
415 return 0;
416 }
417
418 static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
419 {
420 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
421 int len = 0;
422 uint32_t type;
423 uint32_t ctype;
424
425 print_atom("hdlr", atom);
426
427 get_byte(pb); /* version */
428 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
429
430 /* component type */
431 ctype = get_le32(pb);
432 type = get_le32(pb); /* component subtype */
433
434 #ifdef DEBUG
435 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);
436 av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
437 #endif
438 #ifdef DEBUG
439 /* XXX: yeah this is ugly... */
440 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
441 if(type == MKTAG('v', 'i', 'd', 'e'))
442 puts("hdlr: vide");
443 else if(type == MKTAG('s', 'o', 'u', 'n'))
444 puts("hdlr: soun");
445 } else if(ctype == 0) { /* MP4 */
446 if(type == MKTAG('v', 'i', 'd', 'e'))
447 puts("hdlr: vide");
448 else if(type == MKTAG('s', 'o', 'u', 'n'))
449 puts("hdlr: soun");
450 else if(type == MKTAG('o', 'd', 's', 'm'))
451 puts("hdlr: odsm");
452 else if(type == MKTAG('s', 'd', 's', 'm'))
453 puts("hdlr: sdsm");
454 } else puts("hdlr: meta");
455 #endif
456
457 if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
458 /* helps parsing the string hereafter... */
459 c->mp4 = 0;
460 if(type == MKTAG('v', 'i', 'd', 'e'))
461 st->codec.codec_type = CODEC_TYPE_VIDEO;
462 else if(type == MKTAG('s', 'o', 'u', 'n'))
463 st->codec.codec_type = CODEC_TYPE_AUDIO;
464 } else if(ctype == 0) { /* MP4 */
465 /* helps parsing the string hereafter... */
466 c->mp4 = 1;
467 if(type == MKTAG('v', 'i', 'd', 'e'))
468 st->codec.codec_type = CODEC_TYPE_VIDEO;
469 else if(type == MKTAG('s', 'o', 'u', 'n'))
470 st->codec.codec_type = CODEC_TYPE_AUDIO;
471 }
472 get_be32(pb); /* component manufacture */
473 get_be32(pb); /* component flags */
474 get_be32(pb); /* component flags mask */
475
476 if(atom.size <= 24)
477 return 0; /* nothing left to read */
478 /* XXX: MP4 uses a C string, not a pascal one */
479 /* component name */
480
481 if(c->mp4) {
482 /* .mp4: C string */
483 while(get_byte(pb) && (++len < (atom.size - 24)));
484 } else {
485 /* .mov: PASCAL string */
486 #ifdef DEBUG
487 char* buf;
488 #endif
489 len = get_byte(pb);
490 #ifdef DEBUG
491 buf = (uint8_t*) av_malloc(len+1);
492 if (buf) {
493 get_buffer(pb, buf, len);
494 buf[len] = '\0';
495 av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf);
496 av_free(buf);
497 } else
498 #endif
499 url_fskip(pb, len);
500 }
501
502 url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
503 return 0;
504 }
505
506 static int mov_mp4_read_descr_len(ByteIOContext *pb)
507 {
508 int len = 0;
509 int count = 4;
510 while (count--) {
511 int c = get_byte(pb);
512 len = (len << 7) | (c & 0x7f);
513 if (!(c & 0x80))
514 break;
515 }
516 return len;
517 }
518
519 static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)
520 {
521 int len;
522 *tag = get_byte(pb);
523 len = mov_mp4_read_descr_len(pb);
524 #ifdef DEBUG
525 av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
526 #endif
527 return len;
528 }
529
530 static inline unsigned int get_be24(ByteIOContext *s)
531 {
532 unsigned int val;
533 val = get_byte(s) << 16;
534 val |= get_byte(s) << 8;
535 val |= get_byte(s);
536 return val;
537 }
538
539 static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
540 {
541 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
542 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
543 int64_t start_pos = url_ftell(pb);
544 int tag, len;
545
546 print_atom("esds", atom);
547
548 /* Well, broken but suffisant for some MP4 streams */
549 get_be32(pb); /* version + flags */
550 len = mov_mp4_read_descr(pb, &tag);
551 if (tag == MP4ESDescrTag) {
552 get_be16(pb); /* ID */
553 get_byte(pb); /* priority */
554 } else
555 get_be16(pb); /* ID */
556
557 len = mov_mp4_read_descr(pb, &tag);
558 if (tag == MP4DecConfigDescrTag) {
559 sc->esds.object_type_id = get_byte(pb);
560 sc->esds.stream_type = get_byte(pb);
561 sc->esds.buffer_size_db = get_be24(pb);
562 sc->esds.max_bitrate = get_be32(pb);
563 sc->esds.avg_bitrate = get_be32(pb);
564
565 len = mov_mp4_read_descr(pb, &tag);
566 //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);
567 if (tag == MP4DecSpecificDescrTag) {
568 #ifdef DEBUG
569 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
570 #endif
571 st->codec.extradata = (uint8_t*) av_mallocz(len);
572 if (st->codec.extradata) {
573 get_buffer(pb, st->codec.extradata, len);
574 st->codec.extradata_size = len;
575 }
576 }
577 }
578 /* in any case, skip garbage */
579 url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
580 return 0;
581 }
582
583 /* this atom contains actual media data */
584 static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
585 {
586 print_atom("mdat", atom);
587
588 if(atom.size == 0) /* wrong one (MP4) */
589 return 0;
590 c->found_mdat=1;
591 c->mdat_offset = atom.offset;
592 c->mdat_size = atom.size;
593 if(c->found_moov)
594 return 1; /* found both, just go */
595 url_fskip(pb, atom.size);
596 return 0; /* now go for moov */
597 }
598
599 /* this atom should contain all header atoms */
600 static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
601 {
602 int err;
603
604 print_atom("moov", atom);
605
606 err = mov_read_default(c, pb, atom);
607 /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
608 /* so we don't parse the whole file if over a network */
609 c->found_moov=1;
610 if(c->found_mdat)
611 return 1; /* found both, just go */
612 return 0; /* now go for mdat */
613 }
614
615
616 static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
617 {
618 print_atom("mdhd", atom);
619
620 get_byte(pb); /* version */
621
622 get_byte(pb); get_byte(pb);
623 get_byte(pb); /* flags */
624
625 get_be32(pb); /* creation time */
626 get_be32(pb); /* modification time */
627
628 c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
629
630 #ifdef DEBUG
631 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 */
632 #endif
633 get_be32(pb); /* duration */
634
635 get_be16(pb); /* language */
636 get_be16(pb); /* quality */
637
638 return 0;
639 }
640
641 static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
642 {
643 print_atom("mvhd", atom);
644
645 get_byte(pb); /* version */
646 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
647
648 get_be32(pb); /* creation time */
649 get_be32(pb); /* modification time */
650 c->time_scale = get_be32(pb); /* time scale */
651 #ifdef DEBUG
652 av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);
653 #endif
654 c->duration = get_be32(pb); /* duration */
655 get_be32(pb); /* preferred scale */
656
657 get_be16(pb); /* preferred volume */
658
659 url_fskip(pb, 10); /* reserved */
660
661 url_fskip(pb, 36); /* display matrix */
662
663 get_be32(pb); /* preview time */
664 get_be32(pb); /* preview duration */
665 get_be32(pb); /* poster time */
666 get_be32(pb); /* selection time */
667 get_be32(pb); /* selection duration */
668 get_be32(pb); /* current time */
669 get_be32(pb); /* next track ID */
670
671 return 0;
672 }
673
674 static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
675 {
676 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
677
678 // currently SVQ3 decoder expect full STSD header - so let's fake it
679 // this should be fixed and just SMI header should be passed
680 av_free(st->codec.extradata);
681 st->codec.extradata_size = 0x5a + atom.size;
682 st->codec.extradata = (uint8_t*) av_mallocz(st->codec.extradata_size);
683
684 if (st->codec.extradata) {
685 strcpy(st->codec.extradata, "SVQ3"); // fake
686 get_buffer(pb, st->codec.extradata + 0x5a, atom.size);
687 //av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld %s\n", atom.size, (char*)st->codec.extradata + 0x5a);
688 } else
689 url_fskip(pb, atom.size);
690
691 return 0;
692 }
693
694 static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
695 {
696 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
697 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
698 int entries, i;
699
700 print_atom("stco", atom);
701
702 get_byte(pb); /* version */
703 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
704
705 entries = get_be32(pb);
706 sc->chunk_count = entries;
707 sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));
708 if (!sc->chunk_offsets)
709 return -1;
710 if (atom.type == MKTAG('s', 't', 'c', 'o')) {
711 for(i=0; i<entries; i++) {
712 sc->chunk_offsets[i] = get_be32(pb);
713 }
714 } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
715 for(i=0; i<entries; i++) {
716 sc->chunk_offsets[i] = get_be64(pb);
717 }
718 } else
719 return -1;
720 #ifdef DEBUG
721 /*
722 for(i=0; i<entries; i++) {
723 av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
724 }
725 */
726 #endif
727 return 0;
728 }
729
730 static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
731 {
732 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
733 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
734 int entries, frames_per_sample;
735 uint32_t format;
736
737 /* for palette traversal */
738 int color_depth;
739 int color_start;
740 int color_count;
741 int color_end;
742 int color_index;
743 int color_dec;
744 int color_greyscale;
745 unsigned char *color_table;
746 int j;
747 unsigned char r, g, b;
748
749 print_atom("stsd", atom);
750
751 get_byte(pb); /* version */
752 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
753
754 entries = get_be32(pb);
755
756 while(entries--) { //Parsing Sample description table
757 enum CodecID id;
758 int size = get_be32(pb); /* size */
759 format = get_le32(pb); /* data format */
760
761 get_be32(pb); /* reserved */
762 get_be16(pb); /* reserved */
763 get_be16(pb); /* index */
764
765 /* for MPEG4: set codec type by looking for it */
766 id = codec_get_id(mov_video_tags, format);
767 if (id >= 0) {
768 AVCodec *codec;
769 codec = avcodec_find_decoder(id);
770 if (codec)
771 st->codec.codec_type = codec->type;
772 }
773 #ifdef DEBUG
774 av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n",
775 size,
776 (format >> 0) & 0xff,
777 (format >> 8) & 0xff,
778 (format >> 16) & 0xff,
779 (format >> 24) & 0xff,
780 st->codec.codec_type);
781 #endif
782 st->codec.codec_tag = format;
783 if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
784 MOV_atom_t a = { 0, 0, 0 };
785 st->codec.codec_id = id;
786 get_be16(pb); /* version */
787 get_be16(pb); /* revision level */
788 get_be32(pb); /* vendor */
789 get_be32(pb); /* temporal quality */
790 get_be32(pb); /* spacial quality */
791 st->codec.width = get_be16(pb); /* width */
792 st->codec.height = get_be16(pb); /* height */
793 #if 1
794 if (st->codec.codec_id == CODEC_ID_MPEG4) {
795 /* in some MPEG4 the width/height are not correct, so
796 we ignore this info */
797 st->codec.width = 0;
798 st->codec.height = 0;
799 }
800 #endif
801 get_be32(pb); /* horiz resolution */
802 get_be32(pb); /* vert resolution */
803 get_be32(pb); /* data size, always 0 */
804 frames_per_sample = get_be16(pb); /* frames per samples */
805 #ifdef DEBUG
806 av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);
807 #endif
808 get_buffer(pb, (uint8_t *)st->codec.codec_name, 32); /* codec name */
809
810 st->codec.bits_per_sample = get_be16(pb); /* depth */
811 st->codec.color_table_id = get_be16(pb); /* colortable id */
812
813 /* These are set in mov_read_stts and might already be set!
814 st->codec.frame_rate = 25;
815 st->codec.frame_rate_base = 1;
816 */
817 size -= (16+8*4+2+32+2*2);
818 #if 0
819 while (size >= 8) {
820 MOV_atom_t a;
821 int64_t start_pos;
822
823 a.size = get_be32(pb);
824 a.type = get_le32(pb);
825 size -= 8;
826 #ifdef DEBUG
827 av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",
828 (a.type >> 0) & 0xff,
829 (a.type >> 8) & 0xff,
830 (a.type >> 16) & 0xff,
831 (a.type >> 24) & 0xff,
832 a.size, size);
833 #endif
834 start_pos = url_ftell(pb);
835
836 switch(a.type) {
837 case MKTAG('e', 's', 'd', 's'):
838 {
839 int tag, len;
840 /* Well, broken but suffisant for some MP4 streams */
841 get_be32(pb); /* version + flags */
842 len = mov_mp4_read_descr(pb, &tag);
843 if (tag == 0x03) {
844 /* MP4ESDescrTag */
845 get_be16(pb); /* ID */
846 get_byte(pb); /* priority */
847 len = mov_mp4_read_descr(pb, &tag);
848 if (tag != 0x04)
849 goto fail;
850 /* MP4DecConfigDescrTag */
851 get_byte(pb); /* objectTypeId */
852 get_be32(pb); /* streamType + buffer size */
853 get_be32(pb); /* max bit rate */
854 get_be32(pb); /* avg bit rate */
855 len = mov_mp4_read_descr(pb, &tag);
856 if (tag != 0x05)
857 goto fail;
858 /* MP4DecSpecificDescrTag */
859 #ifdef DEBUG
860 av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
861 #endif
862 sc->header_data = av_mallocz(len);
863 if (sc->header_data) {
864 get_buffer(pb, sc->header_data, len);
865 sc->header_len = len;
866 }
867 }
868 /* in any case, skip garbage */
869 }
870 break;
871 default:
872 break;
873 }
874 fail:
875 av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld %d\n", atom.size, url_ftell(pb) - start_pos);
876 if (atom.size > 8) {
877 url_fskip(pb, (atom.size - 8) -
878 ((url_ftell(pb) - start_pos)));
879 size -= atom.size - 8;
880 }
881 }
882 if (size > 0) {
883 /* unknown extension */
884 url_fskip(pb, size);
885 }
886 #else
887
888 /* figure out the palette situation */
889 color_depth = st->codec.bits_per_sample & 0x1F;
890 color_greyscale = st->codec.bits_per_sample & 0x20;
891
892 /* if the depth is 2, 4, or 8 bpp, file is palettized */
893 if ((color_depth == 2) || (color_depth == 4) ||
894 (color_depth == 8)) {
895
896 if (color_greyscale) {
897
898 /* compute the greyscale palette */
899 color_count = 1 << color_depth;
900 color_index = 255;
901 color_dec = 256 / (color_count - 1);
902 for (j = 0; j < color_count; j++) {
903 r = g = b = color_index;
904 c->palette_control.palette[j] =
905 (r << 16) | (g << 8) | (b);
906 color_index -= color_dec;
907 if (color_index < 0)
908 color_index = 0;
909 }
910
911 } else if (st->codec.color_table_id & 0x08) {
912
913 /* if flag bit 3 is set, use the default palette */
914 color_count = 1 << color_depth;
915 if (color_depth == 2)
916 color_table = ff_qt_default_palette_4;
917 else if (color_depth == 4)
918 color_table = ff_qt_default_palette_16;
919 else
920 color_table = ff_qt_default_palette_256;
921
922 for (j = 0; j < color_count; j++) {
923 r = color_table[j * 4 + 0];
924 g = color_table[j * 4 + 1];
925 b = color_table[j * 4 + 2];
926 c->palette_control.palette[j] =
927 (r << 16) | (g << 8) | (b);
928 }
929
930 } else {
931
932 /* load the palette from the file */
933 color_start = get_be32(pb);
934 color_count = get_be16(pb);
935 color_end = get_be16(pb);
936 for (j = color_start; j <= color_end; j++) {
937 /* each R, G, or B component is 16 bits;
938 * only use the top 8 bits; skip alpha bytes
939 * up front */
940 get_byte(pb);
941 get_byte(pb);
942 r = get_byte(pb);
943 get_byte(pb);
944 g = get_byte(pb);
945 get_byte(pb);
946 b = get_byte(pb);
947 get_byte(pb);
948 c->palette_control.palette[j] =
949 (r << 16) | (g << 8) | (b);
950 }
951 }
952
953 st->codec.palctrl = &c->palette_control;
954 st->codec.palctrl->palette_changed = 1;
955 } else
956 st->codec.palctrl = NULL;
957
958 a.size = size;
959 mov_read_default(c, pb, a);
960 #endif
961 } else {
962 st->codec.codec_id = codec_get_id(mov_audio_tags, format);
963 if(st->codec.codec_id==CODEC_ID_AMR_NB || st->codec.codec_id==CODEC_ID_AMR_WB) //from TS26.244
964 {
965 #ifdef DEBUG
966 av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");
967 #endif
968 get_be32(pb);get_be32(pb); //Reserved_8
969 get_be16(pb);//Reserved_2
970 get_be16(pb);//Reserved_2
971 get_be32(pb);//Reserved_4
972 get_be16(pb);//TimeScale
973 get_be16(pb);//Reserved_2
974
975 //AMRSpecificBox.(10 bytes)
976
977 get_be32(pb); //size
978 get_be32(pb); //type=='damr'
979 get_be32(pb); //vendor
980 get_byte(pb); //decoder version
981 get_be16(pb); //mode_set
982 get_byte(pb); //mode_change_period
983 get_byte(pb); //frames_per_sample
984
985 st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames
986 if(st->codec.codec_id==CODEC_ID_AMR_NB)
987 {
988 st->codec.sample_rate=8000;
989 st->codec.channels=1;
990 }
991 else //AMR-WB
992 {
993 st->codec.sample_rate=16000;
994 st->codec.channels=1;
995 }
996 st->codec.bits_per_sample=16;
997 st->codec.bit_rate=0; /*It is not possible to tell this before we have
998 an audio frame and even then every frame can be different*/
999 }
1000 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))
1001 {
1002 //This is some stuff for the hint track, lets ignore it!
1003 //Do some mp4 auto detect.
1004 c->mp4=1;
1005 size-=(16);
1006 url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
1007 }
1008 else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 'a' ))
1009 {
1010 /* Handle mp4 audio tag */
1011 get_be32(pb); /* version */
1012 get_be32(pb);
1013 st->codec.channels = get_be16(pb); /* channels */
1014 st->codec.bits_per_sample = get_be16(pb); /* bits per sample */
1015 get_be32(pb);
1016 st->codec.sample_rate = get_be16(pb); /* sample rate, not always correct */
1017 get_be16(pb);
1018 c->mp4=1;
1019 {
1020 MOV_atom_t a = { format, url_ftell(pb), size - (20 + 20 + 8) };
1021 mov_read_default(c, pb, a);
1022 }
1023 /* Get correct sample rate from extradata */
1024 if(st->codec.extradata_size) {
1025 const int samplerate_table[] = {
1026 96000, 88200, 64000, 48000, 44100, 32000,
1027 24000, 22050, 16000, 12000, 11025, 8000,
1028 7350, 0, 0, 0
1029 };
1030 unsigned char *px = st->codec.extradata;
1031 // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels
1032 int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);
1033 st->codec.sample_rate = samplerate_table[samplerate_index];
1034 }
1035 }
1036 else if(size>=(16+20))
1037 {//16 bytes read, reading atleast 20 more
1038 #ifdef DEBUG
1039 av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);
1040 #endif
1041 uint16_t version = get_be16(pb); /* version */
1042 get_be16(pb); /* revision level */
1043 get_be32(pb); /* vendor */
1044
1045 st->codec.channels = get_be16(pb); /* channel count */
1046 st->codec.bits_per_sample = get_be16(pb); /* sample size */
1047
1048 /* handle specific s8 codec */
1049 get_be16(pb); /* compression id = 0*/
1050 get_be16(pb); /* packet size = 0 */
1051
1052 st->codec.sample_rate = ((get_be32(pb) >> 16));
1053 //av_log(NULL, AV_LOG_DEBUG, "CODECID %d %d %.4s\n", st->codec.codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
1054
1055 switch (st->codec.codec_id) {
1056 case CODEC_ID_PCM_S16BE:
1057 if (st->codec.bits_per_sample == 8)
1058 st->codec.codec_id = CODEC_ID_PCM_S8;
1059 /* fall */
1060 case CODEC_ID_PCM_U8:
1061 st->codec.bit_rate = st->codec.sample_rate * 8;
1062 break;
1063 default:
1064 ;
1065 }
1066
1067 //Read QT version 1 fields. In version 0 theese dont exist
1068 #ifdef DEBUG
1069 av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);
1070 av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));
1071 #endif
1072 if((version==1) && size>=(16+20+16))
1073 {
1074 get_be32(pb); /* samples per packet */
1075 get_be32(pb); /* bytes per packet */
1076 get_be32(pb); /* bytes per frame */
1077 get_be32(pb); /* bytes per sample */
1078 if(size>(16+20+16))
1079 {
1080 //Optional, additional atom-based fields
1081 #ifdef DEBUG
1082 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 ),
1083 (format >> 0) & 0xff,
1084 (format >> 8) & 0xff,
1085 (format >> 16) & 0xff,
1086 (format >> 24) & 0xff);
1087 #endif
1088 MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
1089 mov_read_default(c, pb, a);
1090 }
1091 }
1092 else
1093 {
1094 //We should be down to 0 bytes here, but lets make sure.
1095 size-=(16+20);
1096 #ifdef DEBUG
1097 if(size>0)
1098 av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));
1099 #endif
1100 url_fskip(pb, size);
1101 }
1102 }
1103 else
1104 {
1105 size-=16;
1106 //Unknown size, but lets do our best and skip the rest.
1107 #ifdef DEBUG
1108 av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);
1109 #endif
1110 url_fskip(pb, size);
1111 }
1112 }
1113 }
1114
1115 return 0;
1116 }
1117
1118 static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1119 {
1120 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1121 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1122 int entries, i;
1123
1124 print_atom("stsc", atom);
1125
1126 get_byte(pb); /* version */
1127 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1128
1129 entries = get_be32(pb);
1130 #ifdef DEBUG
1131 av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1132 #endif
1133 sc->sample_to_chunk_sz = entries;
1134 sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
1135 if (!sc->sample_to_chunk)
1136 return -1;
1137 for(i=0; i<entries; i++) {
1138 sc->sample_to_chunk[i].first = get_be32(pb);
1139 sc->sample_to_chunk[i].count = get_be32(pb);
1140 sc->sample_to_chunk[i].id = get_be32(pb);
1141 #ifdef DEBUG
1142 /* 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); */
1143 #endif
1144 }
1145 return 0;
1146 }
1147
1148 static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1149 {
1150 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1151 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1152 int entries, i;
1153
1154 print_atom("stss", atom);
1155
1156 get_byte(pb); /* version */
1157 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1158
1159 entries = get_be32(pb);
1160 sc->keyframe_count = entries;
1161 #ifdef DEBUG
1162 av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);
1163 #endif
1164 sc->keyframes = (long*) av_malloc(entries * sizeof(long));
1165 if (!sc->keyframes)
1166 return -1;
1167 for(i=0; i<entries; i++) {
1168 sc->keyframes[i] = get_be32(pb);
1169 #ifdef DEBUG
1170 /* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
1171 #endif
1172 }
1173 return 0;
1174 }
1175
1176 static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1177 {
1178 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1179 MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1180 int entries, i;
1181
1182 print_atom("stsz", atom);
1183
1184 get_byte(pb); /* version */
1185 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1186
1187 sc->sample_size = get_be32(pb);
1188 entries = get_be32(pb);
1189 sc->sample_count = entries;
1190 #ifdef DEBUG
1191 av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
1192 #endif
1193 if(sc->sample_size)
1194 return 0; /* there isn't any table following */
1195 sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));
1196 if (!sc->sample_sizes)
1197 return -1;
1198 for(i=0; i<entries; i++) {
1199 sc->sample_sizes[i] = get_be32(pb);
1200 #ifdef DEBUG
1201 /* av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]); */
1202 #endif
1203 }
1204 return 0;
1205 }
1206
1207 static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1208 {
1209 AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1210 //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1211 int entries, i;
1212 int64_t duration=0;
1213 int64_t total_sample_count=0;
1214
1215 print_atom("stts", atom);
1216
1217 get_byte(pb); /* version */
1218 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1219 entries = get_be32(pb);
1220
1221 c->streams[c->fc->nb_streams-1]->stts_count = entries;
1222 c->streams[c->fc->nb_streams-1]->stts_data = (uint64_t*) av_malloc(entries * sizeof(uint64_t));
1223
1224 #ifdef DEBUG
1225 av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1226 #endif
1227 for(i=0; i<entries; i++) {
1228 int32_t sample_duration;
1229 int32_t sample_count;
1230
1231 sample_count=get_be32(pb);
1232 sample_duration = get_be32(pb);
1233 c->streams[c->fc->nb_streams - 1]->stts_data[i] = (uint64_t)sample_count<<32 | (uint64_t)sample_duration;
1234 #ifdef DEBUG
1235 av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1236 #endif
1237 duration+=sample_duration*sample_count;
1238 total_sample_count+=sample_count;
1239
1240 #if 0 //We calculate an average instead, needed by .mp4-files created with nec e606 3g phone
1241
1242 if (!i && st->codec.codec_type==CODEC_TYPE_VIDEO) {
1243 st->codec.frame_rate_base = sample_duration ? sample_duration : 1;
1244 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1245 #ifdef DEBUG
1246 av_log(NULL, AV_LOG_DEBUG, "VIDEO FRAME RATE= %i (sd= %i)\n", st->codec.frame_rate, sample_duration);
1247 #endif
1248 }
1249 #endif
1250 }
1251
1252 /*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/
1253 if(duration>0)
1254 {
1255 av_reduce(
1256 &st->codec.frame_rate,
1257 &st->codec.frame_rate_base,
1258 c->streams[c->fc->nb_streams-1]->time_scale * total_sample_count,
1259 duration,
1260 INT_MAX
1261 );
1262
1263 #ifdef DEBUG
1264 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);
1265 #endif
1266 }
1267 else
1268 {
1269 st->codec.frame_rate_base = 1;
1270 st->codec.frame_rate = c->streams[c->fc->nb_streams-1]->time_scale;
1271 }
1272 return 0;
1273 }
1274
1275 static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1276 {
1277 AVStream *st;
1278 MOVStreamContext *sc;
1279
1280 print_atom("trak", atom);
1281
1282 st = av_new_stream(c->fc, c->fc->nb_streams);
1283 if (!st) return -2;
1284 sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
1285 if (!sc) {
1286 av_free(st);
1287 return -1;
1288 }
1289
1290 sc->sample_to_chunk_index = -1;
1291 st->priv_data = sc;
1292 st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
1293 st->start_time = 0; /* XXX: check */
1294 st->duration = (c->duration * (int64_t)AV_TIME_BASE) / c->time_scale;
1295 c->streams[c->fc->nb_streams-1] = sc;
1296
1297 return mov_read_default(c, pb, atom);
1298 }
1299
1300 static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1301 {
1302 AVStream *st;
1303
1304 print_atom("tkhd", atom);
1305
1306 st = c->fc->streams[c->fc->nb_streams-1];
1307
1308 get_byte(pb); /* version */
1309
1310 get_byte(pb); get_byte(pb);
1311 get_byte(pb); /* flags */
1312 /*
1313 MOV_TRACK_ENABLED 0x0001
1314 MOV_TRACK_IN_MOVIE 0x0002
1315 MOV_TRACK_IN_PREVIEW 0x0004
1316 MOV_TRACK_IN_POSTER 0x0008
1317 */
1318
1319 get_be32(pb); /* creation time */
1320 get_be32(pb); /* modification time */
1321 st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1322 get_be32(pb); /* reserved */
1323 st->start_time = 0; /* check */
1324 st->duration = (get_be32(pb) * (int64_t)AV_TIME_BASE) / c->time_scale; /* duration */
1325 get_be32(pb); /* reserved */
1326 get_be32(pb); /* reserved */
1327
1328 get_be16(pb); /* layer */
1329 get_be16(pb); /* alternate group */
1330 get_be16(pb); /* volume */
1331 get_be16(pb); /* reserved */
1332
1333 url_fskip(pb, 36); /* display matrix */
1334
1335 /* those are fixed-point */
1336 st->codec.width = get_be32(pb) >> 16; /* track width */
1337 st->codec.height = get_be32(pb) >> 16; /* track height */
1338
1339 return 0;
1340 }
1341
1342 /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1343 /* like the files created with Adobe Premiere 5.0, for samples see */
1344 /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1345 static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1346 {
1347 int err;
1348
1349 #ifdef DEBUG
1350 print_atom("wide", atom);
1351 debug_indent++;
1352 #endif
1353 if (atom.size < 8)
1354 return 0; /* continue */
1355 if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1356 url_fskip(pb, atom.size - 4);
1357 return 0;
1358 }
1359 atom.type = get_le32(pb);
1360 atom.offset += 8;
1361 atom.size -= 8;
1362 if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1363 url_fskip(pb, atom.size);
1364 return 0;
1365 }
1366 err = mov_read_mdat(c, pb, atom);
1367 #ifdef DEBUG
1368 debug_indent--;
1369 #endif
1370 return err;
1371 }
1372
1373
1374 #ifdef CONFIG_ZLIB
1375 static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
1376 {
1377 return -1;
1378 }
1379
1380 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1381 {
1382 ByteIOContext ctx;
1383 uint8_t *cmov_data;
1384 uint8_t *moov_data; /* uncompressed data */
1385 long cmov_len, moov_len;
1386 int ret;
1387
1388 print_atom("cmov", atom);
1389
1390 get_be32(pb); /* dcom atom */
1391 if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1392 return -1;
1393 if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1394 av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");
1395 return -1;
1396 }
1397 get_be32(pb); /* cmvd atom */
1398 if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1399 return -1;
1400 moov_len = get_be32(pb); /* uncompressed size */
1401 cmov_len = atom.size - 6 * 4;
1402
1403 cmov_data = (uint8_t *) av_malloc(cmov_len);
1404 if (!cmov_data)
1405 return -1;
1406 moov_data = (uint8_t *) av_malloc(moov_len);
1407 if (!moov_data) {
1408 av_free(cmov_data);
1409 return -1;
1410 }
1411 get_buffer(pb, cmov_data, cmov_len);
1412 if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1413 return -1;
1414 if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)
1415 return -1;
1416 ctx.buf_end = ctx.buffer + moov_len;
1417 atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1418 atom.offset = 0;
1419 atom.size = moov_len;
1420 #ifdef DEBUG
1421 { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1422 #endif
1423 ret = mov_read_default(c, &ctx, atom);
1424 av_free(moov_data);
1425 av_free(cmov_data);
1426
1427 return ret;
1428 }
1429 #endif
1430
1431 /* edit list atom */
1432 static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1433 {
1434 int i, edit_count;
1435 print_atom("elst", atom);
1436
1437 get_byte(pb); /* version */
1438 get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1439 edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */
1440
1441 for(i=0; i<edit_count; i++){
1442 get_be32(pb); /* Track duration */
1443 get_be32(pb); /* Media time */
1444 get_be32(pb); /* Media rate */
1445 }
1446 #ifdef DEBUG
1447 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);
1448 #endif
1449 return 0;
1450 }
1451
1452 static const MOVParseTableEntry mov_default_parse_table[] = {
1453 /* mp4 atoms */
1454 { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1455 { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
1456 { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
1457 { MKTAG( 'c', 't', 't', 's' ), mov_read_leaf }, /* composition time to sample */
1458 { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
1459 { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
1460 { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
1461 { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1462 { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1463 { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
1464 { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1465 { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
1466 { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
1467 { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
1468 { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1469 { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1470 { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1471 { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1472 { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1473 { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
1474 { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
1475 { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
1476 { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
1477 { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1478 { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
1479 { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
1480 { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
1481 { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
1482 { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
1483 { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorrenson extension ??? */
1484 { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1485 { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1486 { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
1487 { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1488 { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1489 { MKTAG( 's', 't', 's', 'h' ), mov_read_default },
1490 { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1491 { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1492 { MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1493 { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1494 { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1495 { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
1496 { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
1497 { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
1498 { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
1499 { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_default },
1500 { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
1501 { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_default },
1502 /* extra mp4 */
1503 { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
1504 /* QT atoms */
1505 { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
1506 { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
1507 { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
1508 { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
1509 { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1510 { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
1511 { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
1512 { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
1513 { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
1514 { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
1515 { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
1516 { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
1517 { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
1518 { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
1519 { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
1520 { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1521 //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
1522 #ifdef CONFIG_ZLIB
1523 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1524 #else
1525 { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
1526 #endif
1527 { 0L, mov_read_leaf }
1528 };
1529
1530 static void mov_free_stream_context(MOVStreamContext *sc)
1531 {
1532 if(sc) {
1533 av_free(sc->chunk_offsets);
1534 av_free(sc->sample_to_chunk);
1535 av_free(sc->sample_sizes);
1536 av_free(sc->keyframes);
1537 av_free(sc->header_data);
1538 av_free(sc->stts_data);
1539 av_free(sc);
1540 }
1541 }
1542
1543 static inline uint32_t mov_to_tag(uint8_t *buf)
1544 {
1545 return MKTAG(buf[0], buf[1], buf[2], buf[3]);
1546 }
1547
1548 static inline uint32_t to_be32(uint8_t *buf)
1549 {
1550 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
1551 }
1552
1553 /* XXX: is it sufficient ? */
1554 static int mov_probe(AVProbeData *p)
1555 {
1556 unsigned int offset;
1557 uint32_t tag;
1558
1559 /* check file header */
1560 if (p->buf_size <= 12)
1561 return 0;
1562 offset = 0;
1563 for(;;) {
1564 /* ignore invalid offset */
1565 if ((offset + 8) > (unsigned int)p->buf_size)
1566 return 0;
1567 tag = mov_to_tag(p->buf + offset + 4);
1568 switch(tag) {
1569 case MKTAG( 'm', 'o', 'o', 'v' ):
1570 case MKTAG( 'w', 'i', 'd', 'e' ):
1571 case MKTAG( 'f', 'r', 'e', 'e' ):
1572 case MKTAG( 'm', 'd', 'a', 't' ):
1573 case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1574 case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1575 return AVPROBE_SCORE_MAX;
1576 case MKTAG( 'f', 't', 'y', 'p' ):
1577 case MKTAG( 's', 'k', 'i', 'p' ):
1578 offset = to_be32(p->buf+offset) + offset;
1579 break;
1580 default:
1581 /* unrecognized tag */
1582 return 0;
1583 }
1584 }
1585 return 0;
1586 }
1587
1588 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1589 {
1590 MOVContext *mov = (MOVContext *) s->priv_data;
1591 ByteIOContext *pb = &s->pb;
1592 int i, j, nb, err;
1593 MOV_atom_t atom = { 0, 0, 0 };
1594
1595 mov->fc = s;
1596 mov->parse_table = mov_default_parse_table;
1597 #if 0
1598 /* XXX: I think we should auto detect */
1599 if(s->iformat->name[1] == 'p')
1600 mov->mp4 = 1;
1601 #endif
1602 if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1603 atom.size = url_filesize(url_fileno(pb));
1604 else
1605 atom.size = 0x7FFFFFFFFFFFFFFFLL;
1606
1607 #ifdef DEBUG
1608 av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);
1609 #endif
1610
1611 /* check MOV header */
1612 err = mov_read_default(mov, pb, atom);
1613 if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1614 av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",
1615 err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1616 return -1;
1617 }
1618 #ifdef DEBUG
1619 av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1620 #endif
1621 /* some cleanup : make sure we are on the mdat atom */
1622 if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
1623 url_fseek(pb, mov->mdat_offset, SEEK_SET);
1624
1625 mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
1626
1627 #ifdef DEBUG
1628 av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));
1629 #endif
1630
1631 #ifdef DEBUG
1632 av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);
1633 #endif
1634 mov->total_streams = nb = s->nb_streams;
1635
1636 #if 1
1637 for(i=0; i<s->nb_streams;) {
1638 if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
1639 av_free(s->streams[i]);
1640 for(j=i+1; j<s->nb_streams; j++)
1641 s->streams[j-1] = s->streams[j];
1642 s->nb_streams--;
1643 } else
1644 i++;
1645 }
1646 for(i=0; i<s->nb_streams;i++) {
1647 MOVStreamContext *sc;
1648 sc = (MOVStreamContext *)s->streams[i]->priv_data;
1649 sc->ffindex = i;
1650 sc->is_ff_stream = 1;
1651 }
1652 #endif
1653 #ifdef DEBUG
1654 av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);
1655 #endif
1656 return 0;
1657 }
1658
1659 /* Yes, this is ugly... I didn't write the specs of QT :p */
1660 /* XXX:remove useless commented code sometime */
1661 static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1662 {
1663 MOVContext *mov = (MOVContext *) s->priv_data;
1664 MOVStreamContext *sc;
1665 int64_t offset = 0x0FFFFFFFFFFFFFFFLL;
1666 int i, a, b, m;
1667 int size;
1668 size = 0x0FFFFFFF;
1669
1670 #ifdef MOV_SPLIT_CHUNKS
1671 if (mov->partial) {
1672
1673 int idx;
1674
1675 sc = mov->partial;
1676 idx = sc->sample_to_chunk_index;
1677
1678 if (idx < 0) return 0;
1679 size = sc->sample_sizes[sc->current_sample];
1680
1681 sc->current_sample++;
1682 sc->left_in_chunk--;
1683
1684 if (sc->left_in_chunk <= 0)
1685 mov->partial = 0;
1686 offset = mov->next_chunk_offset;
1687 /* extract the sample */
1688
1689 goto readchunk;
1690 }
1691 #endif
1692
1693 again:
1694 sc = 0;
1695 for(i=0; i<mov->total_streams; i++) {
1696 MOVStreamContext *msc = mov->streams[i];
1697 //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));
1698 if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0
1699 && (msc->chunk_offsets[msc->next_chunk] < offset)) {
1700 sc = msc;
1701 offset = msc->chunk_offsets[msc->next_chunk];
1702 //av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
1703 }
1704 }
1705 if (!sc || offset==0x0FFFFFFFFFFFFFFFLL)
1706 return -1;
1707
1708 sc->next_chunk++;
1709
1710 if(mov->next_chunk_offset < offset) { /* some meta data */
1711 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1712 mov->next_chunk_offset = offset;
1713 }
1714
1715 //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
1716 if(!sc->is_ff_stream) {
1717 url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1718 mov->next_chunk_offset = offset;
1719 offset = 0x0FFFFFFFFFFFFFFFLL;
1720 goto again;
1721 }
1722
1723 /* now get the chunk size... */
1724
1725 for(i=0; i<mov->total_streams; i++) {
1726 MOVStreamContext *msc = mov->streams[i];
1727 if ((msc->next_chunk < msc->chunk_count)
1728 && ((msc->chunk_offsets[msc->next_chunk] - offset) < size))
1729 size = msc->chunk_offsets[msc->next_chunk] - offset;
1730 }
1731
1732 #ifdef MOV_MINOLTA_FIX
1733 //Make sure that size is according to sample_size (Needed by .mov files
1734 //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
1735 //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
1736 //but I have no such movies
1737 if (sc->sample_size > 0) {
1738 int foundsize=0;
1739 for(i=0; i<(sc->sample_to_chunk_sz); i++) {
1740 if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) && (sc->sample_size>0) )
1741 {
1742 // I can't figure out why for PCM audio sample_size is always 1
1743 // (it should actually be channels*bits_per_second/8) but it is.
1744 AVCodecContext* cod = &s->streams[sc->ffindex]->codec;
1745 if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))
1746 foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
1747 else
1748 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;
1749 }
1750 #ifdef DEBUG
1751 /*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);*/
1752 #endif
1753 }
1754 if( (foundsize>0) && (foundsize<size) )
1755 {
1756 #ifdef DEBUG
1757 /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/
1758 #endif
1759 size=foundsize;
1760 }
1761 }
1762 #endif //MOV_MINOLTA_FIX
1763
1764 #ifdef MOV_SPLIT_CHUNKS
1765 /* split chunks into samples */
1766 if (sc->sample_size == 0) {
1767 int idx = sc->sample_to_chunk_index;
1768 if ((idx + 1 < sc->sample_to_chunk_sz)
1769 && (sc->next_chunk >= sc->sample_to_chunk[idx + 1].first))
1770 idx++;
1771 sc->sample_to_chunk_index = idx;
1772 if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {
1773 mov->partial = sc;
1774 /* we'll have to get those samples before next chunk */
1775 sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
1776 size = sc->sample_sizes[sc->current_sample];
1777 }
1778
1779 sc->current_sample++;
1780 }
1781 #endif
1782
1783 readchunk:
1784 //av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli (%i)\n", st_id, offset, offset + size, size);
1785 if(size == 0x0FFFFFFF)
1786 size = mov->mdat_size + mov->mdat_offset - offset;
1787 if(size < 0)
1788 return -1;
1789 if(size == 0)
1790 return -1;
1791 url_fseek(&s->pb, offset, SEEK_SET);
1792
1793 //av_log(NULL, AV_LOG_DEBUG, "READCHUNK hlen: %d %d off: %Ld pos:%Ld\n", size, sc->header_len, offset, url_ftell(&s->pb));
1794 if (sc->header_len > 0) {
1795 av_new_packet(pkt, size + sc->header_len);
1796 memcpy(pkt->data, sc->header_data, sc->header_len);
1797 get_buffer(&s->pb, pkt->data + sc->header_len, size);
1798 /* free header */
1799 av_freep(&sc->header_data);
1800 sc->header_len = 0;
1801 } else {
1802 av_new_packet(pkt, size);
1803 get_buffer(&s->pb, pkt->data, pkt->size);
1804 }
1805 pkt->stream_index = sc->ffindex;
1806
1807 // If the keyframes table exists, mark any samples that are in the table as key frames.
1808 // If no table exists, treat very sample as a key frame.
1809 if (sc->keyframes) {
1810 a = 0;
1811 b = sc->keyframe_count - 1;
1812
1813 while (a < b) {
1814 m = (a + b + 1) >> 1;
1815 if (sc->keyframes[m] > sc->current_sample) {
1816 b = m - 1;
1817 } else {
1818 a = m;
1819 }
1820 }
1821
1822 if (sc->keyframes[a] == sc->current_sample)
1823 pkt->flags |= PKT_FLAG_KEY;
1824 }
1825 else
1826 pkt->flags |= PKT_FLAG_KEY;
1827
1828 #ifdef DEBUG
1829 /*
1830 av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);
1831 for(i=0; i<8; i++)
1832 av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);
1833 for(i=0; i<8; i++)
1834 av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);
1835 puts("");
1836 */
1837 #endif
1838
1839 mov->next_chunk_offset = offset + size;
1840
1841 return 0;
1842 }
1843
1844 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
1845 /**
1846 * Seek method based on the one described in the Appendix C of QTFileFormat.pdf
1847 */
1848 static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp)
1849 {
1850 MOVContext* mov = (MOVContext *) s->priv_data;
1851 MOVStreamContext* sc;
1852 int32_t i, a, b, m;
1853 int64_t sample_time;
1854 int64_t start_time;
1855 int32_t seek_sample, sample;
1856 int32_t duration;
1857 int32_t count;
1858 int32_t chunk;
1859 int32_t left_in_chunk;
1860 int64_t chunk_file_offset;
1861 int64_t sample_file_offset;
1862 int32_t first_chunk_sample;
1863 int32_t sample_to_chunk_idx;
1864 int mov_idx;
1865
1866 // Find the corresponding mov stream
1867 for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)
1868 if (mov->streams[mov_idx]->ffindex == stream_index)
1869 break;
1870 if (mov_idx == mov->total_streams) {
1871 av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
1872 return -1;
1873 }
1874 sc = mov->streams[mov_idx];
1875
1876 // Step 1. Find the edit that contains the requested time (elst)
1877 if (sc->edit_count) {
1878 // FIXME should handle edit list
1879 av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
1880 return -1;
1881 }
1882
1883 // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
1884 #ifdef DEBUG
1885 av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);
1886 #endif
1887 // convert timestamp from time_base unit to timescale unit
1888 sample_time = av_rescale( timestamp,
1889 (int64_t)sc->time_scale * s->streams[stream_index]->time_base.num,
1890 (int64_t)s->streams[stream_index]->time_base.den);
1891 start_time = 0; // FIXME use elst atom
1892 sample = 1; // sample are 0 based in table
1893 #ifdef DEBUG
1894 av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);
1895 #endif
1896 for (i = 0; i < sc->stts_count; i++) {
1897 count = (uint32_t)(sc->stts_data[i]>>32);
1898 duration = (uint32_t)(sc->stts_data[i]&0xffff);
1899 //av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);
1900 //av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);
1901 if ((start_time + count*duration) > sample_time) {
1902 sample += (sample_time - start_time) / duration;
1903 break;
1904 }
1905 sample += count;
1906 start_time += count * duration;
1907 }
1908 /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
1909 is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
1910
1911 #ifdef DEBUG
1912 av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);
1913 #endif
1914 if (sample > sc->sample_count) {
1915 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);
1916 return -1;
1917 }
1918
1919 // Step 3. Find the prior sync. sample using the Sync sample atom (stss)
1920 if (sc->keyframes) {
1921 a = 0;
1922 b = sc->keyframe_count - 1;
1923 while (a < b) {
1924 m = (a + b + 1) >> 1;
1925 if (sc->keyframes[m] > sample) {
1926 b = m - 1;
1927 } else {
1928 a = m;
1929 }
1930 #ifdef DEBUG
1931 // 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);
1932 #endif
1933 }
1934 seek_sample = sc->keyframes[a];
1935 }
1936 else
1937 seek_sample = sample; // else all samples are key frames
1938 #ifdef DEBUG
1939 av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);
1940 #endif
1941
1942 // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
1943 for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {
1944 b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
1945 if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
1946 break;
1947 first_chunk_sample += b;
1948 }
1949 chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;
1950 left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;
1951 first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;
1952 sample_to_chunk_idx = i;
1953 #ifdef DEBUG
1954 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);
1955 #endif
1956
1957 // Step 5. Find the offset of the chunk using the chunk offset atom
1958 if (!sc->chunk_offsets) {
1959 av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
1960 return -1;
1961 }
1962 if (chunk > sc->chunk_count) {
1963 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);
1964 return -1;
1965 }
1966 chunk_file_offset = sc->chunk_offsets[chunk - 1];
1967 #ifdef DEBUG
1968 av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);
1969 #endif
1970
1971 // Step 6. Find the byte offset within the chunk using the sample size atom
1972 sample_file_offset = chunk_file_offset;
1973 if (sc->sample_size)
1974 sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;
1975 else {
1976 for (i = 0; i < (seek_sample - first_chunk_sample); i++) {
1977 sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
1978 }
1979 }
1980 #ifdef DEBUG
1981 av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);
1982 #endif
1983
1984 // Step 6. Update the parser
1985 mov->partial = sc;
1986 mov->next_chunk_offset = sample_file_offset;
1987 // Update current stream state
1988 sc->current_sample = seek_sample - 1; // zero based
1989 sc->left_in_chunk = left_in_chunk;
1990 sc->next_chunk = chunk; // +1 -1 (zero based)
1991 sc->sample_to_chunk_index = sample_to_chunk_idx;
1992
1993 // Update other streams
1994 for (i = 0; i<mov->total_streams; i++) {
1995 MOVStreamContext *msc;
1996 if (i == mov_idx) continue;
1997 // Find the nearest 'next' chunk
1998 msc = mov->streams[i];
1999 a = 0;
2000 b = msc->chunk_count - 1;
2001 while (a < b) {
2002 m = (a + b + 1) >> 1;
2003 if (msc->chunk_offsets[m] > chunk_file_offset) {
2004 b = m - 1;
2005 } else {
2006 a = m;
2007 }
2008 #ifdef DEBUG
2009 /* av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"
2010 , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m], i); */
2011 #endif
2012 }
2013 msc->next_chunk = a;
2014 if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))
2015 msc->next_chunk ++;
2016 #ifdef DEBUG
2017 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]);
2018 #endif
2019 // Compute sample count and index in the sample_to_chunk table (what a pity)
2020 msc->sample_to_chunk_index = 0;
2021 msc->current_sample = 0;
2022 for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)
2023 && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {
2024 msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
2025 * msc->sample_to_chunk[msc->sample_to_chunk_index].count;
2026 }
2027 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;
2028 msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
2029 #ifdef DEBUG
2030 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);
2031 #endif
2032 }
2033 return 0;
2034 }
2035 #endif
2036
2037 static int mov_read_close(AVFormatContext *s)
2038 {
2039 int i;
2040 MOVContext *mov = (MOVContext *) s->priv_data;
2041 for(i=0; i<mov->total_streams; i++)
2042 mov_free_stream_context(mov->streams[i]);
2043 /* free color tabs */
2044 for(i=0; i<mov->ctab_size; i++)
2045 av_freep(&mov->ctab[i]);
2046 av_freep(&mov->ctab);
2047 return 0;
2048 }
2049
2050 static AVInputFormat mov_iformat = {
2051 "mov,mp4,m4a,3gp",
2052 "QuickTime/MPEG4 format",
2053 sizeof(MOVContext),
2054 mov_probe,
2055 mov_read_header,
2056 mov_read_packet,
2057 mov_read_close,
2058 #if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2059 mov_read_seek,
2060 #endif
2061 };
2062
2063 int mov_init(void)
2064 {
2065 av_register_input_format(&mov_iformat);
2066 return 0;
2067 }