Do not read index chunks as audio/video data; closes issue 1336.
[libav.git] / libavformat / avidec.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * AVI demuxer
15d6e361 3 * Copyright (c) 2001 Fabrice Bellard
de6d9b64 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
19720f15
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
FB
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
19720f15 17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 20 */
7b114c09 21
c13b250b
BC
22//#define DEBUG
23//#define DEBUG_SEEK
24
2bb6eba2 25#include "libavutil/intreadwrite.h"
7b114c09 26#include "libavutil/bswap.h"
de6d9b64
FB
27#include "avformat.h"
28#include "avi.h"
7458ccbb 29#include "dv.h"
9d9f4119 30#include "riff.h"
de6d9b64 31
52a0bbff
MN
32#undef NDEBUG
33#include <assert.h>
34
155e9ee9 35typedef struct AVIStream {
7c7f3866 36 int64_t frame_offset; /* current frame (video) or byte (audio) counter
155e9ee9 37 (used to compute the pts) */
7c7f3866
MN
38 int remaining;
39 int packet_size;
40
155e9ee9 41 int scale;
115329f1 42 int rate;
8223bca5 43 int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
115329f1 44
94d1d6c0 45 int64_t cum_len; /* temporary storage (used during seek) */
115329f1 46
d2c5f0a4
MN
47 int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
48 int prefix_count;
b7c40744
MN
49 uint32_t pal[256];
50 int has_pal;
155e9ee9 51} AVIStream;
de6d9b64
FB
52
53typedef struct {
7458ccbb
RS
54 int64_t riff_end;
55 int64_t movi_end;
ea4b2b5e 56 int64_t fsize;
bc5c918e 57 int64_t movi_list;
7ccc636f 58 int64_t last_pkt_pos;
155e9ee9 59 int index_loaded;
8f9298f8 60 int is_odml;
7c7f3866
MN
61 int non_interleaved;
62 int stream_index;
ddaae6a9 63 DVDemuxContext* dv_demux;
de6d9b64
FB
64} AVIContext;
65
7b31b092
AJ
66static const char avi_headers[][8] = {
67 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
68 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
69 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19},
b925ef61 70 { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' },
0b04ebb3 71 { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' },
7b31b092
AJ
72 { 0 }
73};
74
42feef6b 75static int avi_load_index(AVFormatContext *s);
30a43f2d 76static int guess_ni_flag(AVFormatContext *s);
42feef6b 77
de6d9b64 78#ifdef DEBUG
1101abfe 79static void print_tag(const char *str, unsigned int tag, int size)
de6d9b64 80{
c13b250b 81 dprintf(NULL, "%s: tag=%c%c%c%c size=0x%x\n",
de6d9b64
FB
82 str, tag & 0xff,
83 (tag >> 8) & 0xff,
84 (tag >> 16) & 0xff,
85 (tag >> 24) & 0xff,
86 size);
87}
88#endif
89
87ad63c0 90static int get_riff(AVFormatContext *s, ByteIOContext *pb)
06219cb1 91{
87ad63c0 92 AVIContext *avi = s->priv_data;
7b31b092
AJ
93 char header[8];
94 int i;
06219cb1 95
7b31b092
AJ
96 /* check RIFF header */
97 get_buffer(pb, header, 4);
06219cb1
RS
98 avi->riff_end = get_le32(pb); /* RIFF chunk size */
99 avi->riff_end += url_ftell(pb); /* RIFF chunk end */
7b31b092
AJ
100 get_buffer(pb, header+4, 4);
101
102 for(i=0; avi_headers[i][0]; i++)
103 if(!memcmp(header, avi_headers[i], 8))
104 break;
105 if(!avi_headers[i][0])
06219cb1 106 return -1;
115329f1 107
7b31b092 108 if(header[7] == 0x19)
87ad63c0 109 av_log(s, AV_LOG_INFO, "This file has been generated by a totally broken muxer.\n");
7b31b092 110
06219cb1
RS
111 return 0;
112}
113
94d1d6c0 114static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
8945ebb9 115 AVIContext *avi = s->priv_data;
899681cd 116 ByteIOContext *pb = s->pb;
94d1d6c0
MN
117 int longs_pre_entry= get_le16(pb);
118 int index_sub_type = get_byte(pb);
119 int index_type = get_byte(pb);
120 int entries_in_use = get_le32(pb);
121 int chunk_id = get_le32(pb);
122 int64_t base = get_le64(pb);
123 int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
124 AVStream *st;
125 AVIStream *ast;
126 int i;
8945ebb9 127 int64_t last_pos= -1;
899681cd 128 int64_t filesize= url_fsize(s->pb);
94d1d6c0 129
965a63af 130#ifdef DEBUG_SEEK
949b1a13 131 av_log(s, AV_LOG_ERROR, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64"\n",
965a63af
MN
132 longs_pre_entry,index_type, entries_in_use, chunk_id, base);
133#endif
94d1d6c0
MN
134
135 if(stream_id > s->nb_streams || stream_id < 0)
136 return -1;
137 st= s->streams[stream_id];
138 ast = st->priv_data;
139
140 if(index_sub_type)
141 return -1;
142
143 get_le32(pb);
144
145 if(index_type && longs_pre_entry != 2)
146 return -1;
147 if(index_type>1)
148 return -1;
149
965a63af
MN
150 if(filesize > 0 && base >= filesize){
151 av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
152 if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF)
153 base &= 0xFFFFFFFF;
154 else
155 return -1;
156 }
157
94d1d6c0
MN
158 for(i=0; i<entries_in_use; i++){
159 if(index_type){
30a43f2d 160 int64_t pos= get_le32(pb) + base - 8;
94d1d6c0 161 int len = get_le32(pb);
30a43f2d 162 int key= len >= 0;
94d1d6c0
MN
163 len &= 0x7FFFFFFF;
164
965a63af 165#ifdef DEBUG_SEEK
949b1a13 166 av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
965a63af 167#endif
8ebe099a
MN
168 if(url_feof(pb))
169 return -1;
170
8945ebb9
MN
171 if(last_pos == pos || pos == base - 8)
172 avi->non_interleaved= 1;
ca5b528e 173 if(last_pos != pos)
2b70eb2b 174 av_add_index_entry(st, pos, ast->cum_len / FFMAX(1, ast->sample_size), len, 0, key ? AVINDEX_KEYFRAME : 0);
30a43f2d 175
94d1d6c0 176 if(ast->sample_size)
2b70eb2b 177 ast->cum_len += len;
94d1d6c0
MN
178 else
179 ast->cum_len ++;
8945ebb9 180 last_pos= pos;
94d1d6c0 181 }else{
26b89135
MR
182 int64_t offset, pos;
183 int duration;
184 offset = get_le64(pb);
185 get_le32(pb); /* size */
186 duration = get_le32(pb);
8ebe099a
MN
187
188 if(url_feof(pb))
189 return -1;
190
26b89135 191 pos = url_ftell(pb);
94d1d6c0
MN
192
193 url_fseek(pb, offset+8, SEEK_SET);
194 read_braindead_odml_indx(s, frame_num);
195 frame_num += duration;
196
197 url_fseek(pb, pos, SEEK_SET);
198 }
199 }
965a63af 200 avi->index_loaded=1;
94d1d6c0
MN
201 return 0;
202}
203
115e8ae5 204static void clean_index(AVFormatContext *s){
965a63af
MN
205 int i;
206 int64_t j;
115e8ae5
MN
207
208 for(i=0; i<s->nb_streams; i++){
209 AVStream *st = s->streams[i];
210 AVIStream *ast = st->priv_data;
211 int n= st->nb_index_entries;
212 int max= ast->sample_size;
213 int64_t pos, size, ts;
214
215 if(n != 1 || ast->sample_size==0)
216 continue;
217
218 while(max < 1024) max+=max;
219
220 pos= st->index_entries[0].pos;
221 size= st->index_entries[0].size;
222 ts= st->index_entries[0].timestamp;
223
224 for(j=0; j<size; j+=max){
225 av_add_index_entry(st, pos+j, ts + j/ast->sample_size, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME);
226 }
227 }
228}
229
47146dfb 230static int avi_read_tag(AVFormatContext *s, const char *key, unsigned int size)
57060f89 231{
47146dfb
MN
232 ByteIOContext *pb = s->pb;
233 uint8_t value[1024];
234
bc5c918e 235 int64_t i = url_ftell(pb);
57060f89 236 size += (size & 1);
47146dfb 237 get_strz(pb, value, sizeof(value));
57060f89 238 url_fseek(pb, i+size, SEEK_SET);
47146dfb 239
5ea7ce88 240 return av_metadata_set(&s->metadata, key, value);
57060f89
DC
241}
242
1101abfe 243static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
de6d9b64 244{
c9a65ca8 245 AVIContext *avi = s->priv_data;
899681cd 246 ByteIOContext *pb = s->pb;
9d9aac84 247 unsigned int tag, tag1, handler;
b53f1064 248 int codec_type, stream_index, frame_period, bit_rate;
247eadca 249 unsigned int size, nb_frames;
6d29fba9 250 int i;
de6d9b64 251 AVStream *st;
26b89135 252 AVIStream *ast = NULL;
0b04ebb3
VV
253 int avih_width=0, avih_height=0;
254 int amv_file_format=0;
5a4a4d78 255 uint64_t list_end = 0;
de6d9b64 256
7c7f3866 257 avi->stream_index= -1;
115329f1 258
037c08d6 259 if (get_riff(s, pb) < 0)
de6d9b64 260 return -1;
1101abfe 261
ea4b2b5e
MN
262 avi->fsize = url_fsize(pb);
263 if(avi->fsize<=0)
87657891 264 avi->fsize= avi->riff_end == 8 ? INT64_MAX : avi->riff_end;
ea4b2b5e 265
de6d9b64
FB
266 /* first list tag */
267 stream_index = -1;
268 codec_type = -1;
269 frame_period = 0;
270 for(;;) {
271 if (url_feof(pb))
272 goto fail;
273 tag = get_le32(pb);
274 size = get_le32(pb);
275#ifdef DEBUG
276 print_tag("tag", tag, size);
277#endif
278
279 switch(tag) {
280 case MKTAG('L', 'I', 'S', 'T'):
5a4a4d78 281 list_end = url_ftell(pb) + size;
15d6e361 282 /* Ignored, except at start of video packets. */
de6d9b64
FB
283 tag1 = get_le32(pb);
284#ifdef DEBUG
285 print_tag("list", tag1, 0);
286#endif
287 if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
155e9ee9 288 avi->movi_list = url_ftell(pb) - 4;
2064c77a 289 if(size) avi->movi_end = avi->movi_list + size + (size & 1);
a965c478 290 else avi->movi_end = url_fsize(pb);
c13b250b 291 dprintf(NULL, "movi end=%"PRIx64"\n", avi->movi_end);
de6d9b64
FB
292 goto end_of_header;
293 }
294 break;
8f9298f8 295 case MKTAG('d', 'm', 'l', 'h'):
bb270c08
DB
296 avi->is_odml = 1;
297 url_fskip(pb, size + (size & 1));
298 break;
0b04ebb3
VV
299 case MKTAG('a', 'm', 'v', 'h'):
300 amv_file_format=1;
de6d9b64 301 case MKTAG('a', 'v', 'i', 'h'):
15d6e361 302 /* AVI header */
1101abfe 303 /* using frame_period is bad idea */
de6d9b64
FB
304 frame_period = get_le32(pb);
305 bit_rate = get_le32(pb) * 8;
1894edeb
MN
306 get_le32(pb);
307 avi->non_interleaved |= get_le32(pb) & AVIF_MUSTUSEINDEX;
308
309 url_fskip(pb, 2 * 4);
6d29fba9 310 get_le32(pb);
0b04ebb3
VV
311 get_le32(pb);
312 avih_width=get_le32(pb);
313 avih_height=get_le32(pb);
6d29fba9 314
0b04ebb3 315 url_fskip(pb, size - 10 * 4);
6d29fba9
MN
316 break;
317 case MKTAG('s', 't', 'r', 'h'):
318 /* stream header */
319
320 tag1 = get_le32(pb);
321 handler = get_le32(pb); /* codec tag */
322
323 if(tag1 == MKTAG('p', 'a', 'd', 's')){
324 url_fskip(pb, size - 8);
325 break;
326 }else{
327 stream_index++;
328 st = av_new_stream(s, stream_index);
de6d9b64
FB
329 if (!st)
330 goto fail;
9ee91c2f 331
155e9ee9
FB
332 ast = av_mallocz(sizeof(AVIStream));
333 if (!ast)
334 goto fail;
335 st->priv_data = ast;
bb270c08 336 }
0b04ebb3
VV
337 if(amv_file_format)
338 tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
6d29fba9 339
cc11e2b3 340#ifdef DEBUG
e344c1ea 341 print_tag("strh", tag1, -1);
cc11e2b3 342#endif
b53f1064 343 if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
6eb2de74
RS
344 int64_t dv_dur;
345
115329f1 346 /*
bb270c08 347 * After some consideration -- I don't think we
15d6e361 348 * have to support anything but DV in type1 AVIs.
bb270c08
DB
349 */
350 if (s->nb_streams != 1)
351 goto fail;
352
353 if (handler != MKTAG('d', 'v', 's', 'd') &&
354 handler != MKTAG('d', 'v', 'h', 'd') &&
355 handler != MKTAG('d', 'v', 's', 'l'))
356 goto fail;
357
358 ast = s->streams[0]->priv_data;
359 av_freep(&s->streams[0]->codec->extradata);
360 av_freep(&s->streams[0]);
361 s->nb_streams = 0;
49fb20cb 362 if (CONFIG_DV_DEMUXER) {
38ca53da
AJ
363 avi->dv_demux = dv_init_demux(s);
364 if (!avi->dv_demux)
365 goto fail;
a2a6332b 366 }
bb270c08
DB
367 s->streams[0]->priv_data = ast;
368 url_fskip(pb, 3 * 4);
369 ast->scale = get_le32(pb);
370 ast->rate = get_le32(pb);
6eb2de74
RS
371 url_fskip(pb, 4); /* start time */
372
373 dv_dur = get_le32(pb);
374 if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) {
375 dv_dur *= AV_TIME_BASE;
376 s->duration = av_rescale(dv_dur, ast->scale, ast->rate);
377 }
378 /*
379 * else, leave duration alone; timing estimation in utils.c
15d6e361 380 * will make a guess based on bitrate.
6eb2de74
RS
381 */
382
bb270c08 383 stream_index = s->nb_streams - 1;
6eb2de74 384 url_fskip(pb, size - 9*4);
b53f1064
MN
385 break;
386 }
b559b29b 387
6d29fba9 388 assert(stream_index < s->nb_streams);
01f4895c 389 st->codec->stream_codec_tag= handler;
b559b29b 390
b53f1064
MN
391 get_le32(pb); /* flags */
392 get_le16(pb); /* priority */
393 get_le16(pb); /* language */
394 get_le32(pb); /* initial frame */
395 ast->scale = get_le32(pb);
396 ast->rate = get_le32(pb);
4a030a1f 397 if(!(ast->scale && ast->rate)){
15d6e361 398 av_log(s, AV_LOG_WARNING, "scale/rate is %u/%u which is invalid. (This file has been generated by broken software.)\n", ast->scale, ast->rate);
0dbb6515
MN
399 if(frame_period){
400 ast->rate = 1000000;
401 ast->scale = frame_period;
402 }else{
403 ast->rate = 25;
404 ast->scale = 1;
405 }
4a030a1f 406 }
b53f1064 407 av_set_pts_info(st, 64, ast->scale, ast->rate);
115329f1 408
b72a2bc8 409 ast->cum_len=get_le32(pb); /* start */
b53f1064 410 nb_frames = get_le32(pb);
b559b29b 411
b53f1064 412 st->start_time = 0;
c0df9d75 413 st->duration = nb_frames;
b53f1064
MN
414 get_le32(pb); /* buffer size */
415 get_le32(pb); /* quality */
416 ast->sample_size = get_le32(pb); /* sample ssize */
2b70eb2b 417 ast->cum_len *= FFMAX(1, ast->sample_size);
87ad63c0 418// av_log(s, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
247eadca 419
b53f1064 420 switch(tag1) {
bb270c08 421 case MKTAG('v', 'i', 'd', 's'):
b53f1064 422 codec_type = CODEC_TYPE_VIDEO;
247eadca 423
b53f1064 424 ast->sample_size = 0;
b53f1064
MN
425 break;
426 case MKTAG('a', 'u', 'd', 's'):
427 codec_type = CODEC_TYPE_AUDIO;
9bf9a5fc 428 break;
cc11e2b3 429 case MKTAG('t', 'x', 't', 's'):
115329f1 430 //FIXME
cc11e2b3 431 codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
cc11e2b3 432 break;
25176d6e
FE
433 case MKTAG('d', 'a', 't', 's'):
434 codec_type = CODEC_TYPE_DATA;
435 break;
9bf9a5fc 436 default:
30667f42 437 av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
9bf9a5fc 438 goto fail;
de6d9b64 439 }
2b70eb2b 440 ast->frame_offset= ast->cum_len;
b53f1064 441 url_fskip(pb, size - 12 * 4);
de6d9b64
FB
442 break;
443 case MKTAG('s', 't', 'r', 'f'):
444 /* stream header */
6d29fba9 445 if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
de6d9b64
FB
446 url_fskip(pb, size);
447 } else {
5a4a4d78
RD
448 uint64_t cur_pos = url_ftell(pb);
449 if (cur_pos < list_end)
450 size = FFMIN(size, list_end - cur_pos);
de6d9b64
FB
451 st = s->streams[stream_index];
452 switch(codec_type) {
453 case CODEC_TYPE_VIDEO:
0b04ebb3
VV
454 if(amv_file_format){
455 st->codec->width=avih_width;
456 st->codec->height=avih_height;
457 st->codec->codec_type = CODEC_TYPE_VIDEO;
458 st->codec->codec_id = CODEC_ID_AMV;
459 url_fskip(pb, size);
460 break;
461 }
de6d9b64 462 get_le32(pb); /* size */
01f4895c 463 st->codec->width = get_le32(pb);
31f2616d 464 st->codec->height = (int32_t)get_le32(pb);
de6d9b64 465 get_le16(pb); /* panes */
dd1c8f3e 466 st->codec->bits_per_coded_sample= get_le16(pb); /* depth */
de6d9b64 467 tag1 = get_le32(pb);
b559b29b
MN
468 get_le32(pb); /* ImageSize */
469 get_le32(pb); /* XPelsPerMeter */
470 get_le32(pb); /* YPelsPerMeter */
471 get_le32(pb); /* ClrUsed */
472 get_le32(pb); /* ClrImportant */
473
cbb79c0e
RD
474 if (tag1 == MKTAG('D', 'X', 'S', 'B')) {
475 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
476 st->codec->codec_tag = tag1;
477 st->codec->codec_id = CODEC_ID_XSUB;
478 break;
479 }
480
e344c1ea
SH
481 if(size > 10*4 && size<(1<<30)){
482 st->codec->extradata_size= size - 10*4;
483 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
3dcddf82
RD
484 if (!st->codec->extradata) {
485 st->codec->extradata_size= 0;
486 return AVERROR(ENOMEM);
487 }
e344c1ea
SH
488 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
489 }
115329f1 490
01f4895c 491 if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
952c69c4 492 get_byte(pb);
b559b29b 493
15d6e361
DB
494 /* Extract palette from extradata if bpp <= 8. */
495 /* This code assumes that extradata contains only palette. */
496 /* This is true for all paletted codecs implemented in FFmpeg. */
dd1c8f3e 497 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
01f4895c 498 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
63613fe6 499#if HAVE_BIGENDIAN
01f4895c
MN
500 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
501 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 502#else
01f4895c
MN
503 memcpy(st->codec->palctrl->palette, st->codec->extradata,
504 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 505#endif
01f4895c 506 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
507 }
508
de6d9b64
FB
509#ifdef DEBUG
510 print_tag("video", tag1, 0);
511#endif
01f4895c
MN
512 st->codec->codec_type = CODEC_TYPE_VIDEO;
513 st->codec->codec_tag = tag1;
1a40491e 514 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
15d6e361 515 st->need_parsing = AVSTREAM_PARSE_HEADERS; // This is needed to get the pict type which is necessary for generating correct pts.
31f2616d
MN
516
517 if(st->codec->codec_tag==0 && st->codec->height > 0 && st->codec->extradata_size < 1U<<30){
518 st->codec->extradata_size+= 9;
519 st->codec->extradata= av_realloc(st->codec->extradata, st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
520 if(st->codec->extradata)
521 memcpy(st->codec->extradata + st->codec->extradata_size - 9, "BottomUp", 9);
522 }
523 st->codec->height= FFABS(st->codec->height);
524
b559b29b 525// url_fskip(pb, size - 5 * 4);
de6d9b64 526 break;
9bf9a5fc 527 case CODEC_TYPE_AUDIO:
1a40491e 528 ff_get_wav_header(pb, st->codec, size);
78db672c 529 if(ast->sample_size && st->codec->block_align && ast->sample_size != st->codec->block_align){
143b0820 530 av_log(s, AV_LOG_WARNING, "sample size (%d) != block align (%d)\n", ast->sample_size, st->codec->block_align);
78db672c
MN
531 ast->sample_size= st->codec->block_align;
532 }
1cef9527
FR
533 if (size%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
534 url_fskip(pb, 1);
5836d158 535 /* Force parsing as several audio frames can be in
15d6e361 536 * one packet and timestamps refer to packet start. */
a74008a4 537 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
15d6e361
DB
538 /* ADTS header is in extradata, AAC without header must be
539 * stored as exact frames. Parser not needed and it will
540 * fail. */
cbee7a69 541 if (st->codec->codec_id == CODEC_ID_AAC && st->codec->extradata_size)
57004ff1 542 st->need_parsing = AVSTREAM_PARSE_NONE;
8662900b
DB
543 /* AVI files with Xan DPCM audio (wrongly) declare PCM
544 * audio in the header but have Axan as stream_code_tag. */
2bb6eba2 545 if (st->codec->stream_codec_tag == AV_RL32("Axan")){
8662900b
DB
546 st->codec->codec_id = CODEC_ID_XAN_DPCM;
547 st->codec->codec_tag = 0;
548 }
0b04ebb3
VV
549 if (amv_file_format)
550 st->codec->codec_id = CODEC_ID_ADPCM_IMA_AMV;
de6d9b64
FB
551 break;
552 default:
01f4895c
MN
553 st->codec->codec_type = CODEC_TYPE_DATA;
554 st->codec->codec_id= CODEC_ID_NONE;
555 st->codec->codec_tag= 0;
de6d9b64
FB
556 url_fskip(pb, size);
557 break;
558 }
559 }
560 break;
94d1d6c0
MN
561 case MKTAG('i', 'n', 'd', 'x'):
562 i= url_ftell(pb);
2c00106c 563 if(!url_is_streamed(pb) && !(s->flags & AVFMT_FLAG_IGNIDX)){
b7b22558 564 read_braindead_odml_indx(s, 0);
b7b22558 565 }
94d1d6c0
MN
566 url_fseek(pb, i+size, SEEK_SET);
567 break;
c86ec2f4
MN
568 case MKTAG('v', 'p', 'r', 'p'):
569 if(stream_index < (unsigned)s->nb_streams && size > 9*4){
570 AVRational active, active_aspect;
571
572 st = s->streams[stream_index];
573 get_le32(pb);
574 get_le32(pb);
575 get_le32(pb);
576 get_le32(pb);
577 get_le32(pb);
578
c86ec2f4 579 active_aspect.den= get_le16(pb);
61559562 580 active_aspect.num= get_le16(pb);
c86ec2f4
MN
581 active.num = get_le32(pb);
582 active.den = get_le32(pb);
583 get_le32(pb); //nbFieldsPerFrame
584
585 if(active_aspect.num && active_aspect.den && active.num && active.den){
59729451 586 st->sample_aspect_ratio= av_div_q(active_aspect, active);
c86ec2f4
MN
587//av_log(s, AV_LOG_ERROR, "vprp %d/%d %d/%d\n", active_aspect.num, active_aspect.den, active.num, active.den);
588 }
589 size -= 9*4;
590 }
591 url_fseek(pb, size, SEEK_CUR);
592 break;
57060f89 593 case MKTAG('I', 'N', 'A', 'M'):
47146dfb 594 avi_read_tag(s, "Title", size);
57060f89
DC
595 break;
596 case MKTAG('I', 'A', 'R', 'T'):
47146dfb 597 avi_read_tag(s, "Artist", size);
57060f89
DC
598 break;
599 case MKTAG('I', 'C', 'O', 'P'):
47146dfb 600 avi_read_tag(s, "Copyright", size);
57060f89
DC
601 break;
602 case MKTAG('I', 'C', 'M', 'T'):
47146dfb 603 avi_read_tag(s, "Comment", size);
57060f89
DC
604 break;
605 case MKTAG('I', 'G', 'N', 'R'):
47146dfb 606 avi_read_tag(s, "Genre", size);
57060f89 607 break;
f0861f46 608 case MKTAG('I', 'P', 'R', 'D'):
47146dfb 609 avi_read_tag(s, "Album", size);
f0861f46 610 break;
2ad4648f 611 case MKTAG('I', 'P', 'R', 'T'):
47146dfb 612 avi_read_tag(s, "Track", size);
2ad4648f 613 break;
de6d9b64 614 default:
755c18ae 615 if(size > 1000000){
15d6e361
DB
616 av_log(s, AV_LOG_ERROR, "Something went wrong during header parsing, "
617 "I will ignore it and try to continue anyway.\n");
755c18ae
MN
618 avi->movi_list = url_ftell(pb) - 4;
619 avi->movi_end = url_fsize(pb);
620 goto end_of_header;
621 }
de6d9b64
FB
622 /* skip tag */
623 size += (size & 1);
624 url_fskip(pb, size);
625 break;
626 }
627 }
628 end_of_header:
629 /* check stream number */
630 if (stream_index != s->nb_streams - 1) {
631 fail:
de6d9b64
FB
632 return -1;
633 }
1101abfe 634
b7b22558 635 if(!avi->index_loaded && !url_is_streamed(pb))
94d1d6c0 636 avi_load_index(s);
42feef6b 637 avi->index_loaded = 1;
30a43f2d 638 avi->non_interleaved |= guess_ni_flag(s);
9d4cd3bf 639 if(avi->non_interleaved) {
15d6e361 640 av_log(s, AV_LOG_INFO, "non-interleaved AVI\n");
115e8ae5 641 clean_index(s);
9d4cd3bf 642 }
115329f1 643
de6d9b64
FB
644 return 0;
645}
646
f080a7bd
MN
647static int get_stream_idx(int *d){
648 if( d[0] >= '0' && d[0] <= '9'
649 && d[1] >= '0' && d[1] <= '9'){
650 return (d[0] - '0') * 10 + (d[1] - '0');
651 }else{
652 return 100; //invalid stream ID
653 }
654}
655
1101abfe 656static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64
FB
657{
658 AVIContext *avi = s->priv_data;
899681cd 659 ByteIOContext *pb = s->pb;
f5007cc8
MN
660 int n, d[8];
661 unsigned int size;
bc5c918e 662 int64_t i, sync;
7458ccbb 663 void* dstr;
115329f1 664
49fb20cb 665 if (CONFIG_DV_DEMUXER && avi->dv_demux) {
f5007cc8 666 int size = dv_get_packet(avi->dv_demux, pkt);
bb270c08
DB
667 if (size >= 0)
668 return size;
2af7e610 669 }
115329f1 670
7c7f3866 671 if(avi->non_interleaved){
79396ac6 672 int best_stream_index = 0;
7c7f3866
MN
673 AVStream *best_st= NULL;
674 AVIStream *best_ast;
675 int64_t best_ts= INT64_MAX;
676 int i;
115329f1 677
7c7f3866
MN
678 for(i=0; i<s->nb_streams; i++){
679 AVStream *st = s->streams[i];
680 AVIStream *ast = st->priv_data;
681 int64_t ts= ast->frame_offset;
682
683 if(ast->sample_size)
684 ts /= ast->sample_size;
7a9c86e9 685 ts = av_rescale_q(ts, st->time_base, AV_TIME_BASE_Q);
7c7f3866 686
87ad63c0 687// av_log(s, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
2be83b96 688 if(ts < best_ts && st->nb_index_entries){
7c7f3866
MN
689 best_ts= ts;
690 best_st= st;
691 best_stream_index= i;
692 }
693 }
fce88d52
MN
694 if(!best_st)
695 return -1;
696
7c7f3866 697 best_ast = best_st->priv_data;
7a9c86e9 698 best_ts = av_rescale_q(best_ts, AV_TIME_BASE_Q, best_st->time_base);
7c7f3866
MN
699 if(best_ast->remaining)
700 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
25983dcd 701 else{
7c7f3866 702 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
25983dcd 703 if(i>=0)
a3bb564e
MN
704 best_ast->frame_offset= best_st->index_entries[i].timestamp
705 * FFMAX(1, best_ast->sample_size);
25983dcd 706 }
7c7f3866 707
87ad63c0 708// av_log(s, AV_LOG_DEBUG, "%d\n", i);
7c7f3866
MN
709 if(i>=0){
710 int64_t pos= best_st->index_entries[i].pos;
5c89153e 711 pos += best_ast->packet_size - best_ast->remaining;
899681cd 712 url_fseek(s->pb, pos + 8, SEEK_SET);
87ad63c0 713// av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
115329f1 714
8223bca5
MN
715 assert(best_ast->remaining <= best_ast->packet_size);
716
1894edeb
MN
717 avi->stream_index= best_stream_index;
718 if(!best_ast->remaining)
8223bca5 719 best_ast->packet_size=
1894edeb 720 best_ast->remaining= best_st->index_entries[i].size;
7c7f3866
MN
721 }
722 }
115329f1 723
4a8d5135 724resync:
7c7f3866
MN
725 if(avi->stream_index >= 0){
726 AVStream *st= s->streams[ avi->stream_index ];
727 AVIStream *ast= st->priv_data;
c60a0f85 728 int size, err;
115329f1 729
e84dab5f 730 if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
7c7f3866 731 size= INT_MAX;
115329f1 732 else if(ast->sample_size < 32)
7c7f3866
MN
733 size= 64*ast->sample_size;
734 else
735 size= ast->sample_size;
736
737 if(size > ast->remaining)
738 size= ast->remaining;
7ccc636f 739 avi->last_pkt_pos= url_ftell(pb);
c60a0f85
MN
740 err= av_get_packet(pb, pkt, size);
741 if(err<0)
742 return err;
115329f1 743
b7c40744 744 if(ast->has_pal && pkt->data && pkt->size<(unsigned)INT_MAX/2){
c60a0f85
MN
745 void *ptr= av_realloc(pkt->data, pkt->size + 4*256 + FF_INPUT_BUFFER_PADDING_SIZE);
746 if(ptr){
b7c40744
MN
747 ast->has_pal=0;
748 pkt->size += 4*256;
c60a0f85 749 pkt->data= ptr;
b7c40744 750 memcpy(pkt->data + pkt->size - 4*256, ast->pal, 4*256);
c60a0f85
MN
751 }else
752 av_log(s, AV_LOG_ERROR, "Failed to append palette\n");
b7c40744
MN
753 }
754
49fb20cb 755 if (CONFIG_DV_DEMUXER && avi->dv_demux) {
7c7f3866
MN
756 dstr = pkt->destruct;
757 size = dv_produce_packet(avi->dv_demux, pkt,
758 pkt->data, pkt->size);
759 pkt->destruct = dstr;
760 pkt->flags |= PKT_FLAG_KEY;
761 } else {
15d6e361 762 /* XXX: How to handle B-frames in AVI? */
7c7f3866
MN
763 pkt->dts = ast->frame_offset;
764// pkt->dts += ast->start;
765 if(ast->sample_size)
766 pkt->dts /= ast->sample_size;
87ad63c0 767//av_log(s, AV_LOG_DEBUG, "dts:%"PRId64" offset:%"PRId64" %d/%d smpl_siz:%d base:%d st:%d size:%d\n", pkt->dts, ast->frame_offset, ast->scale, ast->rate, ast->sample_size, AV_TIME_BASE, avi->stream_index, size);
7c7f3866
MN
768 pkt->stream_index = avi->stream_index;
769
01f4895c 770 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
4323b09d
MN
771 AVIndexEntry *e;
772 int index;
ded3c7da 773 assert(st->index_entries);
7c7f3866 774
4323b09d
MN
775 index= av_index_search_timestamp(st, pkt->dts, 0);
776 e= &st->index_entries[index];
115329f1 777
4323b09d
MN
778 if(index >= 0 && e->timestamp == ast->frame_offset){
779 if (e->flags & AVINDEX_KEYFRAME)
780 pkt->flags |= PKT_FLAG_KEY;
781 }
7c7f3866 782 } else {
115329f1 783 pkt->flags |= PKT_FLAG_KEY;
7c7f3866
MN
784 }
785 if(ast->sample_size)
786 ast->frame_offset += pkt->size;
787 else
788 ast->frame_offset++;
789 }
790 ast->remaining -= size;
791 if(!ast->remaining){
792 avi->stream_index= -1;
793 ast->packet_size= 0;
7c7f3866
MN
794 }
795
796 return size;
797 }
798
4a8d5135
MN
799 memset(d, -1, sizeof(int)*8);
800 for(i=sync=url_ftell(pb); !url_feof(pb); i++) {
df99755b 801 int j;
1101abfe 802
df99755b
MN
803 for(j=0; j<7; j++)
804 d[j]= d[j+1];
805 d[7]= get_byte(pb);
115329f1 806
df99755b 807 size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
115329f1 808
f080a7bd 809 n= get_stream_idx(d+2);
87ad63c0 810//av_log(s, AV_LOG_DEBUG, "%X %X %X %X %X %X %X %X %"PRId64" %d %d\n", d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
f5007cc8 811 if(i + (uint64_t)size > avi->fsize || d[0]<0)
d2c5f0a4 812 continue;
115329f1 813
d2c5f0a4
MN
814 //parse ix##
815 if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams)
bb270c08 816 //parse JUNK
bc3a73bc
MN
817 ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')
818 ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){
8f9298f8 819 url_fskip(pb, size);
87ad63c0 820//av_log(s, AV_LOG_DEBUG, "SKIP\n");
4a8d5135 821 goto resync;
8f9298f8 822 }
d2c5f0a4 823
f080a7bd 824 n= get_stream_idx(d);
115329f1 825
7ccc636f
MN
826 if(!((i-avi->last_pkt_pos)&1) && get_stream_idx(d+1) < s->nb_streams)
827 continue;
828
7305d97f
MV
829 //detect ##ix chunk and skip
830 if(d[2] == 'i' && d[3] == 'x' && n < s->nb_streams){
831 url_fskip(pb, size);
832 goto resync;
833 }
834
d2c5f0a4 835 //parse ##dc/##wb
80e3a08c 836 if(n < s->nb_streams){
1ce50d32
MN
837 AVStream *st;
838 AVIStream *ast;
839 st = s->streams[n];
840 ast = st->priv_data;
41757171 841
79d6b9cb
MN
842 if(s->nb_streams>=2){
843 AVStream *st1 = s->streams[1];
844 AVIStream *ast1= st1->priv_data;
1ce50d32
MN
845 //workaround for broken small-file-bug402.avi
846 if( d[2] == 'w' && d[3] == 'b'
847 && n==0
848 && st ->codec->codec_type == CODEC_TYPE_VIDEO
849 && st1->codec->codec_type == CODEC_TYPE_AUDIO
850 && ast->prefix == 'd'*256+'c'
851 && (d[2]*256+d[3] == ast1->prefix || !ast1->prefix_count)
852 ){
853 n=1;
854 st = st1;
855 ast = ast1;
15d6e361 856 av_log(s, AV_LOG_WARNING, "Invalid stream + prefix combination, assuming audio.\n");
1ce50d32 857 }
79d6b9cb 858 }
41757171
MN
859
860
1ce50d32
MN
861 if( (st->discard >= AVDISCARD_DEFAULT && size==0)
862 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
863 || st->discard >= AVDISCARD_ALL){
f3356e9c
MN
864 if(ast->sample_size) ast->frame_offset += pkt->size;
865 else ast->frame_offset++;
b4aea108
MN
866 url_fskip(pb, size);
867 goto resync;
1ce50d32 868 }
d2c5f0a4 869
1ce50d32 870 if (d[2] == 'p' && d[3] == 'c' && size<=4*256+4) {
b7c40744
MN
871 int k = get_byte(pb);
872 int last = (k + get_byte(pb) - 1) & 0xFF;
873
874 get_le16(pb); //flags
875
876 for (; k <= last; k++)
877 ast->pal[k] = get_be32(pb)>>8;// b + (g << 8) + (r << 16);
878 ast->has_pal= 1;
879 goto resync;
1ce50d32
MN
880 } else if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
881 d[2]*256+d[3] == ast->prefix /*||
882 (d[2] == 'd' && d[3] == 'c') ||
883 (d[2] == 'w' && d[3] == 'b')*/) {
d2c5f0a4 884
87ad63c0 885//av_log(s, AV_LOG_DEBUG, "OK\n");
1ce50d32
MN
886 if(d[2]*256+d[3] == ast->prefix)
887 ast->prefix_count++;
888 else{
889 ast->prefix= d[2]*256+d[3];
890 ast->prefix_count= 0;
891 }
d2c5f0a4 892
1ce50d32
MN
893 avi->stream_index= n;
894 ast->packet_size= size + 8;
895 ast->remaining= size;
ded3c7da 896
1ce50d32
MN
897 {
898 uint64_t pos= url_ftell(pb) - 8;
899 if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){
900 av_add_index_entry(st, pos, ast->frame_offset / FFMAX(1, ast->sample_size), size, 0, AVINDEX_KEYFRAME);
901 }
ded3c7da 902 }
1ce50d32 903 goto resync;
ded3c7da 904 }
df99755b
MN
905 }
906 }
d2c5f0a4 907
1e04bbee 908 return AVERROR_EOF;
de6d9b64
FB
909}
910
15d6e361
DB
911/* XXX: We make the implicit supposition that the positions are sorted
912 for each stream. */
155e9ee9
FB
913static int avi_read_idx1(AVFormatContext *s, int size)
914{
7c7f3866 915 AVIContext *avi = s->priv_data;
899681cd 916 ByteIOContext *pb = s->pb;
155e9ee9
FB
917 int nb_index_entries, i;
918 AVStream *st;
919 AVIStream *ast;
155e9ee9 920 unsigned int index, tag, flags, pos, len;
7c7f3866 921 unsigned last_pos= -1;
115329f1 922
155e9ee9
FB
923 nb_index_entries = size / 16;
924 if (nb_index_entries <= 0)
925 return -1;
926
15d6e361 927 /* Read the entries and sort them in each stream component. */
155e9ee9
FB
928 for(i = 0; i < nb_index_entries; i++) {
929 tag = get_le32(pb);
930 flags = get_le32(pb);
931 pos = get_le32(pb);
932 len = get_le32(pb);
52a0bbff 933#if defined(DEBUG_SEEK)
87ad63c0 934 av_log(s, AV_LOG_DEBUG, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
155e9ee9
FB
935 i, tag, flags, pos, len);
936#endif
7c7f3866
MN
937 if(i==0 && pos > avi->movi_list)
938 avi->movi_list= 0; //FIXME better check
5c89153e 939 pos += avi->movi_list;
7c7f3866 940
155e9ee9
FB
941 index = ((tag & 0xff) - '0') * 10;
942 index += ((tag >> 8) & 0xff) - '0';
943 if (index >= s->nb_streams)
944 continue;
945 st = s->streams[index];
946 ast = st->priv_data;
115329f1 947
52a0bbff 948#if defined(DEBUG_SEEK)
87ad63c0 949 av_log(s, AV_LOG_DEBUG, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
52a0bbff 950#endif
8ebe099a
MN
951 if(url_feof(pb))
952 return -1;
953
80e3a08c
MN
954 if(last_pos == pos)
955 avi->non_interleaved= 1;
956 else
2b70eb2b 957 av_add_index_entry(st, pos, ast->cum_len / FFMAX(1, ast->sample_size), len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
7c7f3866 958 if(ast->sample_size)
2b70eb2b 959 ast->cum_len += len;
7c7f3866
MN
960 else
961 ast->cum_len ++;
7c7f3866 962 last_pos= pos;
155e9ee9
FB
963 }
964 return 0;
965}
966
7c7f3866 967static int guess_ni_flag(AVFormatContext *s){
7c7f3866
MN
968 int i;
969 int64_t last_start=0;
970 int64_t first_end= INT64_MAX;
8c68f25b 971 int64_t oldpos= url_ftell(s->pb);
115329f1 972
7c7f3866
MN
973 for(i=0; i<s->nb_streams; i++){
974 AVStream *st = s->streams[i];
7c7f3866 975 int n= st->nb_index_entries;
8c68f25b 976 unsigned int size;
7c7f3866
MN
977
978 if(n <= 0)
979 continue;
980
8c68f25b
MN
981 if(n >= 2){
982 int64_t pos= st->index_entries[0].pos;
983 url_fseek(s->pb, pos + 4, SEEK_SET);
984 size= get_le32(s->pb);
985 if(pos + size > st->index_entries[1].pos)
986 last_start= INT64_MAX;
987 }
988
7c7f3866
MN
989 if(st->index_entries[0].pos > last_start)
990 last_start= st->index_entries[0].pos;
991 if(st->index_entries[n-1].pos < first_end)
992 first_end= st->index_entries[n-1].pos;
993 }
8c68f25b 994 url_fseek(s->pb, oldpos, SEEK_SET);
7c7f3866
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995 return last_start > first_end;
996}
997
155e9ee9
FB
998static int avi_load_index(AVFormatContext *s)
999{
1000 AVIContext *avi = s->priv_data;
899681cd 1001 ByteIOContext *pb = s->pb;
155e9ee9 1002 uint32_t tag, size;
bc5c918e 1003 int64_t pos= url_ftell(pb);
115329f1 1004
155e9ee9
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1005 url_fseek(pb, avi->movi_end, SEEK_SET);
1006#ifdef DEBUG_SEEK
949b1a13 1007 printf("movi_end=0x%"PRIx64"\n", avi->movi_end);
155e9ee9
FB
1008#endif
1009 for(;;) {
1010 if (url_feof(pb))
1011 break;
1012 tag = get_le32(pb);
1013 size = get_le32(pb);
1014#ifdef DEBUG_SEEK
1015 printf("tag=%c%c%c%c size=0x%x\n",
1016 tag & 0xff,
1017 (tag >> 8) & 0xff,
1018 (tag >> 16) & 0xff,
1019 (tag >> 24) & 0xff,
1020 size);
1021#endif
1022 switch(tag) {
1023 case MKTAG('i', 'd', 'x', '1'):
1024 if (avi_read_idx1(s, size) < 0)
1025 goto skip;
1026 else
1027 goto the_end;
1028 break;
1029 default:
1030 skip:
1031 size += (size & 1);
1032 url_fskip(pb, size);
1033 break;
1034 }
1035 }
1036 the_end:
e6c0297f 1037 url_fseek(pb, pos, SEEK_SET);
155e9ee9
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1038 return 0;
1039}
1040
7b3c1382 1041static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
155e9ee9
FB
1042{
1043 AVIContext *avi = s->priv_data;
1044 AVStream *st;
52a0bbff 1045 int i, index;
155e9ee9
FB
1046 int64_t pos;
1047
1048 if (!avi->index_loaded) {
1049 /* we only load the index on demand */
1050 avi_load_index(s);
1051 avi->index_loaded = 1;
1052 }
52a0bbff 1053 assert(stream_index>= 0);
155e9ee9
FB
1054
1055 st = s->streams[stream_index];
52a0bbff
MN
1056 index= av_index_search_timestamp(st, timestamp, flags);
1057 if(index<0)
155e9ee9 1058 return -1;
115329f1 1059
155e9ee9 1060 /* find the position */
52a0bbff
MN
1061 pos = st->index_entries[index].pos;
1062 timestamp = st->index_entries[index].timestamp;
1063
87ad63c0 1064// av_log(s, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
155e9ee9 1065
49fb20cb 1066 if (CONFIG_DV_DEMUXER && avi->dv_demux) {
6eb2de74 1067 /* One and only one real stream for DV in AVI, and it has video */
f4433de9 1068 /* offsets. Calling with other stream indexes should have failed */
6eb2de74
RS
1069 /* the av_index_search_timestamp call above. */
1070 assert(stream_index == 0);
1071
1072 /* Feed the DV video stream version of the timestamp to the */
15d6e361 1073 /* DV demux so it can synthesize correct timestamps. */
6eb2de74
RS
1074 dv_offset_reset(avi->dv_demux, timestamp);
1075
899681cd 1076 url_fseek(s->pb, pos, SEEK_SET);
6eb2de74
RS
1077 avi->stream_index= -1;
1078 return 0;
1079 }
1080
155e9ee9 1081 for(i = 0; i < s->nb_streams; i++) {
52a0bbff
MN
1082 AVStream *st2 = s->streams[i];
1083 AVIStream *ast2 = st2->priv_data;
7c7f3866
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1084
1085 ast2->packet_size=
1086 ast2->remaining= 0;
1087
52a0bbff
MN
1088 if (st2->nb_index_entries <= 0)
1089 continue;
115329f1 1090
e84dab5f 1091// assert(st2->codec->block_align);
62f25230 1092 assert((int64_t)st2->time_base.num*ast2->rate == (int64_t)st2->time_base.den*ast2->scale);
52a0bbff 1093 index = av_index_search_timestamp(
115329f1 1094 st2,
7a9c86e9 1095 av_rescale_q(timestamp, st->time_base, st2->time_base),
52a0bbff
MN
1096 flags | AVSEEK_FLAG_BACKWARD);
1097 if(index<0)
1098 index=0;
115329f1 1099
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1100 if(!avi->non_interleaved){
1101 while(index>0 && st2->index_entries[index].pos > pos)
1102 index--;
1103 while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
1104 index++;
1105 }
1106
87ad63c0 1107// av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
52a0bbff
MN
1108 /* extract the current frame number */
1109 ast2->frame_offset = st2->index_entries[index].timestamp;
1110 if(ast2->sample_size)
1111 ast2->frame_offset *=ast2->sample_size;
155e9ee9 1112 }
52a0bbff 1113
155e9ee9 1114 /* do the seek */
899681cd 1115 url_fseek(s->pb, pos, SEEK_SET);
7c7f3866 1116 avi->stream_index= -1;
155e9ee9
FB
1117 return 0;
1118}
1119
1101abfe 1120static int avi_read_close(AVFormatContext *s)
de6d9b64 1121{
5ae2c73e
MN
1122 int i;
1123 AVIContext *avi = s->priv_data;
5ae2c73e
MN
1124
1125 for(i=0;i<s->nb_streams;i++) {
1126 AVStream *st = s->streams[i];
01f4895c 1127 av_free(st->codec->palctrl);
5ae2c73e
MN
1128 }
1129
7458ccbb
RS
1130 if (avi->dv_demux)
1131 av_free(avi->dv_demux);
1132
c9a65ca8
FB
1133 return 0;
1134}
1135
1136static int avi_probe(AVProbeData *p)
1137{
7b31b092
AJ
1138 int i;
1139
c9a65ca8 1140 /* check file header */
7b31b092
AJ
1141 for(i=0; avi_headers[i][0]; i++)
1142 if(!memcmp(p->buf , avi_headers[i] , 4) &&
1143 !memcmp(p->buf+8, avi_headers[i]+4, 4))
1144 return AVPROBE_SCORE_MAX;
1145
1146 return 0;
c9a65ca8
FB
1147}
1148
ff70e601 1149AVInputFormat avi_demuxer = {
c9a65ca8 1150 "avi",
bde15e74 1151 NULL_IF_CONFIG_SMALL("AVI format"),
c9a65ca8
FB
1152 sizeof(AVIContext),
1153 avi_probe,
1154 avi_read_header,
1155 avi_read_packet,
1156 avi_read_close,
155e9ee9 1157 avi_read_seek,
c9a65ca8 1158};