Bail out immediately with software scaler instead of failing the tests.
[libav.git] / libavformat / avidec.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * AVI demuxer
19720f15 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 */
de6d9b64
FB
21#include "avformat.h"
22#include "avi.h"
7458ccbb 23#include "dv.h"
9d9f4119 24#include "riff.h"
de6d9b64 25
52a0bbff
MN
26#undef NDEBUG
27#include <assert.h>
28
de6d9b64 29//#define DEBUG
155e9ee9
FB
30//#define DEBUG_SEEK
31
155e9ee9 32typedef struct AVIStream {
7c7f3866 33 int64_t frame_offset; /* current frame (video) or byte (audio) counter
155e9ee9 34 (used to compute the pts) */
7c7f3866
MN
35 int remaining;
36 int packet_size;
37
155e9ee9 38 int scale;
115329f1 39 int rate;
8223bca5 40 int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
115329f1 41
94d1d6c0 42 int64_t cum_len; /* temporary storage (used during seek) */
115329f1 43
d2c5f0a4
MN
44 int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
45 int prefix_count;
155e9ee9 46} AVIStream;
de6d9b64
FB
47
48typedef struct {
7458ccbb
RS
49 int64_t riff_end;
50 int64_t movi_end;
de6d9b64 51 offset_t movi_list;
155e9ee9 52 int index_loaded;
8f9298f8 53 int is_odml;
7c7f3866
MN
54 int non_interleaved;
55 int stream_index;
ddaae6a9 56 DVDemuxContext* dv_demux;
de6d9b64
FB
57} AVIContext;
58
42feef6b 59static int avi_load_index(AVFormatContext *s);
30a43f2d 60static int guess_ni_flag(AVFormatContext *s);
42feef6b 61
de6d9b64 62#ifdef DEBUG
1101abfe 63static void print_tag(const char *str, unsigned int tag, int size)
de6d9b64
FB
64{
65 printf("%s: tag=%c%c%c%c size=0x%x\n",
66 str, tag & 0xff,
67 (tag >> 8) & 0xff,
68 (tag >> 16) & 0xff,
69 (tag >> 24) & 0xff,
70 size);
71}
72#endif
73
06219cb1
RS
74static int get_riff(AVIContext *avi, ByteIOContext *pb)
75{
115329f1 76 uint32_t tag;
06219cb1
RS
77 /* check RIFF header */
78 tag = get_le32(pb);
79
80 if (tag != MKTAG('R', 'I', 'F', 'F'))
81 return -1;
82 avi->riff_end = get_le32(pb); /* RIFF chunk size */
83 avi->riff_end += url_ftell(pb); /* RIFF chunk end */
84 tag = get_le32(pb);
85 if (tag != MKTAG('A', 'V', 'I', ' ') && tag != MKTAG('A', 'V', 'I', 'X'))
86 return -1;
115329f1 87
06219cb1
RS
88 return 0;
89}
90
94d1d6c0 91static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
8945ebb9 92 AVIContext *avi = s->priv_data;
94d1d6c0
MN
93 ByteIOContext *pb = &s->pb;
94 int longs_pre_entry= get_le16(pb);
95 int index_sub_type = get_byte(pb);
96 int index_type = get_byte(pb);
97 int entries_in_use = get_le32(pb);
98 int chunk_id = get_le32(pb);
99 int64_t base = get_le64(pb);
100 int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
101 AVStream *st;
102 AVIStream *ast;
103 int i;
8945ebb9 104 int64_t last_pos= -1;
965a63af 105 int64_t filesize= url_fsize(&s->pb);
94d1d6c0 106
965a63af 107#ifdef DEBUG_SEEK
949b1a13 108 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
109 longs_pre_entry,index_type, entries_in_use, chunk_id, base);
110#endif
94d1d6c0
MN
111
112 if(stream_id > s->nb_streams || stream_id < 0)
113 return -1;
114 st= s->streams[stream_id];
115 ast = st->priv_data;
116
117 if(index_sub_type)
118 return -1;
119
120 get_le32(pb);
121
122 if(index_type && longs_pre_entry != 2)
123 return -1;
124 if(index_type>1)
125 return -1;
126
965a63af
MN
127 if(filesize > 0 && base >= filesize){
128 av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
129 if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF)
130 base &= 0xFFFFFFFF;
131 else
132 return -1;
133 }
134
94d1d6c0
MN
135 for(i=0; i<entries_in_use; i++){
136 if(index_type){
30a43f2d 137 int64_t pos= get_le32(pb) + base - 8;
94d1d6c0 138 int len = get_le32(pb);
30a43f2d 139 int key= len >= 0;
94d1d6c0
MN
140 len &= 0x7FFFFFFF;
141
965a63af 142#ifdef DEBUG_SEEK
949b1a13 143 av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
965a63af 144#endif
8945ebb9
MN
145 if(last_pos == pos || pos == base - 8)
146 avi->non_interleaved= 1;
147 else
2b70eb2b 148 av_add_index_entry(st, pos, ast->cum_len / FFMAX(1, ast->sample_size), len, 0, key ? AVINDEX_KEYFRAME : 0);
30a43f2d 149
94d1d6c0 150 if(ast->sample_size)
2b70eb2b 151 ast->cum_len += len;
94d1d6c0
MN
152 else
153 ast->cum_len ++;
8945ebb9 154 last_pos= pos;
94d1d6c0 155 }else{
26b89135
MR
156 int64_t offset, pos;
157 int duration;
158 offset = get_le64(pb);
159 get_le32(pb); /* size */
160 duration = get_le32(pb);
161 pos = url_ftell(pb);
94d1d6c0
MN
162
163 url_fseek(pb, offset+8, SEEK_SET);
164 read_braindead_odml_indx(s, frame_num);
165 frame_num += duration;
166
167 url_fseek(pb, pos, SEEK_SET);
168 }
169 }
965a63af 170 avi->index_loaded=1;
94d1d6c0
MN
171 return 0;
172}
173
115e8ae5 174static void clean_index(AVFormatContext *s){
965a63af
MN
175 int i;
176 int64_t j;
115e8ae5
MN
177
178 for(i=0; i<s->nb_streams; i++){
179 AVStream *st = s->streams[i];
180 AVIStream *ast = st->priv_data;
181 int n= st->nb_index_entries;
182 int max= ast->sample_size;
183 int64_t pos, size, ts;
184
185 if(n != 1 || ast->sample_size==0)
186 continue;
187
188 while(max < 1024) max+=max;
189
190 pos= st->index_entries[0].pos;
191 size= st->index_entries[0].size;
192 ts= st->index_entries[0].timestamp;
193
194 for(j=0; j<size; j+=max){
195 av_add_index_entry(st, pos+j, ts + j/ast->sample_size, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME);
196 }
197 }
198}
199
57060f89
DC
200static int avi_read_tag(ByteIOContext *pb, char *buf, int maxlen, unsigned int size)
201{
202 offset_t i = url_ftell(pb);
203 size += (size & 1);
204 get_strz(pb, buf, maxlen);
205 url_fseek(pb, i+size, SEEK_SET);
206 return 0;
207}
208
1101abfe 209static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
de6d9b64 210{
c9a65ca8 211 AVIContext *avi = s->priv_data;
de6d9b64 212 ByteIOContext *pb = &s->pb;
deb0a292 213 uint32_t tag, tag1, handler;
b53f1064 214 int codec_type, stream_index, frame_period, bit_rate;
247eadca
FB
215 unsigned int size, nb_frames;
216 int i, n;
de6d9b64 217 AVStream *st;
26b89135 218 AVIStream *ast = NULL;
2ad4648f 219 char str_track[4];
de6d9b64 220
7c7f3866 221 avi->stream_index= -1;
115329f1 222
06219cb1 223 if (get_riff(avi, pb) < 0)
de6d9b64 224 return -1;
1101abfe 225
de6d9b64
FB
226 /* first list tag */
227 stream_index = -1;
228 codec_type = -1;
229 frame_period = 0;
230 for(;;) {
231 if (url_feof(pb))
232 goto fail;
233 tag = get_le32(pb);
234 size = get_le32(pb);
235#ifdef DEBUG
236 print_tag("tag", tag, size);
237#endif
238
239 switch(tag) {
240 case MKTAG('L', 'I', 'S', 'T'):
241 /* ignored, except when start of video packets */
242 tag1 = get_le32(pb);
243#ifdef DEBUG
244 print_tag("list", tag1, 0);
245#endif
246 if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
155e9ee9 247 avi->movi_list = url_ftell(pb) - 4;
2064c77a 248 if(size) avi->movi_end = avi->movi_list + size + (size & 1);
a965c478 249 else avi->movi_end = url_fsize(pb);
de6d9b64 250#ifdef DEBUG
949b1a13 251 printf("movi end=%"PRIx64"\n", avi->movi_end);
de6d9b64
FB
252#endif
253 goto end_of_header;
254 }
255 break;
8f9298f8 256 case MKTAG('d', 'm', 'l', 'h'):
bb270c08
DB
257 avi->is_odml = 1;
258 url_fskip(pb, size + (size & 1));
259 break;
de6d9b64 260 case MKTAG('a', 'v', 'i', 'h'):
bb270c08 261 /* avi header */
1101abfe 262 /* using frame_period is bad idea */
de6d9b64
FB
263 frame_period = get_le32(pb);
264 bit_rate = get_le32(pb) * 8;
1894edeb
MN
265 get_le32(pb);
266 avi->non_interleaved |= get_le32(pb) & AVIF_MUSTUSEINDEX;
267
268 url_fskip(pb, 2 * 4);
247eadca
FB
269 n = get_le32(pb);
270 for(i=0;i<n;i++) {
155e9ee9 271 AVIStream *ast;
7458ccbb 272 st = av_new_stream(s, i);
de6d9b64
FB
273 if (!st)
274 goto fail;
9ee91c2f 275
155e9ee9
FB
276 ast = av_mallocz(sizeof(AVIStream));
277 if (!ast)
278 goto fail;
279 st->priv_data = ast;
bb270c08 280 }
de6d9b64
FB
281 url_fskip(pb, size - 7 * 4);
282 break;
283 case MKTAG('s', 't', 'r', 'h'):
284 /* stream header */
285 stream_index++;
286 tag1 = get_le32(pb);
7458ccbb 287 handler = get_le32(pb); /* codec tag */
cc11e2b3 288#ifdef DEBUG
e344c1ea 289 print_tag("strh", tag1, -1);
cc11e2b3 290#endif
b53f1064 291 if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
115329f1 292 /*
bb270c08
DB
293 * After some consideration -- I don't think we
294 * have to support anything but DV in a type1 AVIs.
295 */
296 if (s->nb_streams != 1)
297 goto fail;
298
299 if (handler != MKTAG('d', 'v', 's', 'd') &&
300 handler != MKTAG('d', 'v', 'h', 'd') &&
301 handler != MKTAG('d', 'v', 's', 'l'))
302 goto fail;
303
304 ast = s->streams[0]->priv_data;
305 av_freep(&s->streams[0]->codec->extradata);
306 av_freep(&s->streams[0]);
307 s->nb_streams = 0;
a2a6332b 308 if (ENABLE_DV_DEMUXER) {
38ca53da
AJ
309 avi->dv_demux = dv_init_demux(s);
310 if (!avi->dv_demux)
311 goto fail;
a2a6332b 312 }
bb270c08
DB
313 s->streams[0]->priv_data = ast;
314 url_fskip(pb, 3 * 4);
315 ast->scale = get_le32(pb);
316 ast->rate = get_le32(pb);
317 stream_index = s->nb_streams - 1;
318 url_fskip(pb, size - 7*4);
b53f1064
MN
319 break;
320 }
b559b29b 321
b53f1064
MN
322 if (stream_index >= s->nb_streams) {
323 url_fskip(pb, size - 8);
1c6606e2
KS
324 /* ignore padding stream */
325 if (tag1 == MKTAG('p', 'a', 'd', 's'))
326 stream_index--;
b53f1064 327 break;
115329f1 328 }
b53f1064
MN
329 st = s->streams[stream_index];
330 ast = st->priv_data;
01f4895c 331 st->codec->stream_codec_tag= handler;
b559b29b 332
b53f1064
MN
333 get_le32(pb); /* flags */
334 get_le16(pb); /* priority */
335 get_le16(pb); /* language */
336 get_le32(pb); /* initial frame */
337 ast->scale = get_le32(pb);
338 ast->rate = get_le32(pb);
339 if(ast->scale && ast->rate){
340 }else if(frame_period){
341 ast->rate = 1000000;
342 ast->scale = frame_period;
343 }else{
344 ast->rate = 25;
345 ast->scale = 1;
346 }
347 av_set_pts_info(st, 64, ast->scale, ast->rate);
115329f1 348
b72a2bc8 349 ast->cum_len=get_le32(pb); /* start */
b53f1064 350 nb_frames = get_le32(pb);
b559b29b 351
b53f1064 352 st->start_time = 0;
c0df9d75 353 st->duration = nb_frames;
b53f1064
MN
354 get_le32(pb); /* buffer size */
355 get_le32(pb); /* quality */
356 ast->sample_size = get_le32(pb); /* sample ssize */
2b70eb2b 357 ast->cum_len *= FFMAX(1, ast->sample_size);
b53f1064 358// av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
247eadca 359
b53f1064 360 switch(tag1) {
bb270c08 361 case MKTAG('v', 'i', 'd', 's'):
b53f1064 362 codec_type = CODEC_TYPE_VIDEO;
247eadca 363
b53f1064 364 ast->sample_size = 0;
b53f1064
MN
365 break;
366 case MKTAG('a', 'u', 'd', 's'):
367 codec_type = CODEC_TYPE_AUDIO;
9bf9a5fc 368 break;
cc11e2b3 369 case MKTAG('t', 'x', 't', 's'):
115329f1 370 //FIXME
cc11e2b3 371 codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
cc11e2b3 372 break;
30667f42
MN
373 case MKTAG('p', 'a', 'd', 's'):
374 codec_type = CODEC_TYPE_UNKNOWN;
30667f42
MN
375 stream_index--;
376 break;
9bf9a5fc 377 default:
30667f42 378 av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
9bf9a5fc 379 goto fail;
de6d9b64 380 }
2b70eb2b 381 ast->frame_offset= ast->cum_len;
b53f1064 382 url_fskip(pb, size - 12 * 4);
de6d9b64
FB
383 break;
384 case MKTAG('s', 't', 'r', 'f'):
385 /* stream header */
7458ccbb 386 if (stream_index >= s->nb_streams || avi->dv_demux) {
de6d9b64
FB
387 url_fskip(pb, size);
388 } else {
389 st = s->streams[stream_index];
390 switch(codec_type) {
391 case CODEC_TYPE_VIDEO:
392 get_le32(pb); /* size */
01f4895c
MN
393 st->codec->width = get_le32(pb);
394 st->codec->height = get_le32(pb);
de6d9b64 395 get_le16(pb); /* panes */
01f4895c 396 st->codec->bits_per_sample= get_le16(pb); /* depth */
de6d9b64 397 tag1 = get_le32(pb);
b559b29b
MN
398 get_le32(pb); /* ImageSize */
399 get_le32(pb); /* XPelsPerMeter */
400 get_le32(pb); /* YPelsPerMeter */
401 get_le32(pb); /* ClrUsed */
402 get_le32(pb); /* ClrImportant */
403
e344c1ea
SH
404 if(size > 10*4 && size<(1<<30)){
405 st->codec->extradata_size= size - 10*4;
406 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
407 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
408 }
115329f1 409
01f4895c 410 if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
952c69c4 411 get_byte(pb);
b559b29b 412
5e29abf8
RT
413 /* Extract palette from extradata if bpp <= 8 */
414 /* This code assumes that extradata contains only palette */
415 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
416 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
417 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 418#ifdef WORDS_BIGENDIAN
01f4895c
MN
419 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
420 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 421#else
01f4895c
MN
422 memcpy(st->codec->palctrl->palette, st->codec->extradata,
423 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 424#endif
01f4895c 425 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
426 }
427
de6d9b64
FB
428#ifdef DEBUG
429 print_tag("video", tag1, 0);
430#endif
01f4895c
MN
431 st->codec->codec_type = CODEC_TYPE_VIDEO;
432 st->codec->codec_tag = tag1;
433 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
7cbaa7ba 434 st->need_parsing = 2; //only parse headers dont do slower repacketization, this is needed to get the pict type which is needed for generating correct pts
b559b29b 435// url_fskip(pb, size - 5 * 4);
de6d9b64 436 break;
9bf9a5fc 437 case CODEC_TYPE_AUDIO:
01f4895c 438 get_wav_header(pb, st->codec, size);
e84dab5f
MN
439 if(ast->sample_size && st->codec->block_align && ast->sample_size % st->codec->block_align)
440 av_log(s, AV_LOG_DEBUG, "invalid sample size or block align detected\n");
1cef9527
FR
441 if (size%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
442 url_fskip(pb, 1);
5836d158
DB
443 /* Force parsing as several audio frames can be in
444 * one packet. */
155e9ee9 445 st->need_parsing = 1;
cbee7a69
BC
446 /* ADTS header is in extradata, AAC without header must be stored as exact frames, parser not needed and it will fail */
447 if (st->codec->codec_id == CODEC_ID_AAC && st->codec->extradata_size)
448 st->need_parsing = 0;
8662900b
DB
449 /* AVI files with Xan DPCM audio (wrongly) declare PCM
450 * audio in the header but have Axan as stream_code_tag. */
451 if (st->codec->stream_codec_tag == ff_get_fourcc("Axan")){
452 st->codec->codec_id = CODEC_ID_XAN_DPCM;
453 st->codec->codec_tag = 0;
454 }
de6d9b64
FB
455 break;
456 default:
01f4895c
MN
457 st->codec->codec_type = CODEC_TYPE_DATA;
458 st->codec->codec_id= CODEC_ID_NONE;
459 st->codec->codec_tag= 0;
de6d9b64
FB
460 url_fskip(pb, size);
461 break;
462 }
463 }
464 break;
94d1d6c0
MN
465 case MKTAG('i', 'n', 'd', 'x'):
466 i= url_ftell(pb);
2c00106c 467 if(!url_is_streamed(pb) && !(s->flags & AVFMT_FLAG_IGNIDX)){
b7b22558 468 read_braindead_odml_indx(s, 0);
b7b22558 469 }
94d1d6c0
MN
470 url_fseek(pb, i+size, SEEK_SET);
471 break;
57060f89
DC
472 case MKTAG('I', 'N', 'A', 'M'):
473 avi_read_tag(pb, s->title, sizeof(s->title), size);
474 break;
475 case MKTAG('I', 'A', 'R', 'T'):
476 avi_read_tag(pb, s->author, sizeof(s->author), size);
477 break;
478 case MKTAG('I', 'C', 'O', 'P'):
479 avi_read_tag(pb, s->copyright, sizeof(s->copyright), size);
480 break;
481 case MKTAG('I', 'C', 'M', 'T'):
482 avi_read_tag(pb, s->comment, sizeof(s->comment), size);
483 break;
484 case MKTAG('I', 'G', 'N', 'R'):
485 avi_read_tag(pb, s->genre, sizeof(s->genre), size);
486 break;
f0861f46
PI
487 case MKTAG('I', 'P', 'R', 'D'):
488 avi_read_tag(pb, s->album, sizeof(s->album), size);
489 break;
2ad4648f
PI
490 case MKTAG('I', 'P', 'R', 'T'):
491 avi_read_tag(pb, str_track, sizeof(str_track), size);
492 sscanf(str_track, "%d", &s->track);
493 break;
de6d9b64
FB
494 default:
495 /* skip tag */
496 size += (size & 1);
497 url_fskip(pb, size);
498 break;
499 }
500 }
501 end_of_header:
502 /* check stream number */
503 if (stream_index != s->nb_streams - 1) {
504 fail:
505 for(i=0;i<s->nb_streams;i++) {
01f4895c 506 av_freep(&s->streams[i]->codec->extradata);
9145f8b3 507 av_freep(&s->streams[i]);
de6d9b64
FB
508 }
509 return -1;
510 }
1101abfe 511
b7b22558 512 if(!avi->index_loaded && !url_is_streamed(pb))
94d1d6c0 513 avi_load_index(s);
42feef6b 514 avi->index_loaded = 1;
30a43f2d 515 avi->non_interleaved |= guess_ni_flag(s);
115e8ae5
MN
516 if(avi->non_interleaved)
517 clean_index(s);
115329f1 518
de6d9b64
FB
519 return 0;
520}
521
1101abfe 522static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64
FB
523{
524 AVIContext *avi = s->priv_data;
525 ByteIOContext *pb = &s->pb;
8f9298f8 526 int n, d[8], size;
4a8d5135 527 offset_t i, sync;
7458ccbb 528 void* dstr;
115329f1 529
a2a6332b 530 if (ENABLE_DV_DEMUXER && avi->dv_demux) {
7458ccbb 531 size = dv_get_packet(avi->dv_demux, pkt);
bb270c08
DB
532 if (size >= 0)
533 return size;
2af7e610 534 }
115329f1 535
7c7f3866 536 if(avi->non_interleaved){
79396ac6 537 int best_stream_index = 0;
7c7f3866
MN
538 AVStream *best_st= NULL;
539 AVIStream *best_ast;
540 int64_t best_ts= INT64_MAX;
541 int i;
115329f1 542
7c7f3866
MN
543 for(i=0; i<s->nb_streams; i++){
544 AVStream *st = s->streams[i];
545 AVIStream *ast = st->priv_data;
546 int64_t ts= ast->frame_offset;
547
548 if(ast->sample_size)
549 ts /= ast->sample_size;
550 ts= av_rescale(ts, AV_TIME_BASE * (int64_t)st->time_base.num, st->time_base.den);
551
949b1a13 552// av_log(NULL, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
7c7f3866
MN
553 if(ts < best_ts){
554 best_ts= ts;
555 best_st= st;
556 best_stream_index= i;
557 }
558 }
559 best_ast = best_st->priv_data;
560 best_ts= av_rescale(best_ts, best_st->time_base.den, AV_TIME_BASE * (int64_t)best_st->time_base.num); //FIXME a little ugly
561 if(best_ast->remaining)
562 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
563 else
564 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
565
566// av_log(NULL, AV_LOG_DEBUG, "%d\n", i);
567 if(i>=0){
568 int64_t pos= best_st->index_entries[i].pos;
5c89153e 569 pos += best_ast->packet_size - best_ast->remaining;
1894edeb 570 url_fseek(&s->pb, pos + 8, SEEK_SET);
949b1a13 571// av_log(NULL, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
115329f1 572
8223bca5
MN
573 assert(best_ast->remaining <= best_ast->packet_size);
574
1894edeb
MN
575 avi->stream_index= best_stream_index;
576 if(!best_ast->remaining)
8223bca5 577 best_ast->packet_size=
1894edeb 578 best_ast->remaining= best_st->index_entries[i].size;
7c7f3866
MN
579 }
580 }
115329f1 581
4a8d5135 582resync:
7c7f3866
MN
583 if(avi->stream_index >= 0){
584 AVStream *st= s->streams[ avi->stream_index ];
585 AVIStream *ast= st->priv_data;
586 int size;
115329f1 587
e84dab5f 588 if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
7c7f3866 589 size= INT_MAX;
115329f1 590 else if(ast->sample_size < 32)
7c7f3866
MN
591 size= 64*ast->sample_size;
592 else
593 size= ast->sample_size;
594
595 if(size > ast->remaining)
596 size= ast->remaining;
2692067a 597 av_get_packet(pb, pkt, size);
115329f1 598
a2a6332b 599 if (ENABLE_DV_DEMUXER && avi->dv_demux) {
7c7f3866
MN
600 dstr = pkt->destruct;
601 size = dv_produce_packet(avi->dv_demux, pkt,
602 pkt->data, pkt->size);
603 pkt->destruct = dstr;
604 pkt->flags |= PKT_FLAG_KEY;
605 } else {
606 /* XXX: how to handle B frames in avi ? */
607 pkt->dts = ast->frame_offset;
608// pkt->dts += ast->start;
609 if(ast->sample_size)
610 pkt->dts /= ast->sample_size;
949b1a13 611//av_log(NULL, 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
612 pkt->stream_index = avi->stream_index;
613
01f4895c 614 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
7c7f3866
MN
615 if(st->index_entries){
616 AVIndexEntry *e;
617 int index;
618
619 index= av_index_search_timestamp(st, pkt->dts, 0);
620 e= &st->index_entries[index];
115329f1 621
d46db490 622 if(index >= 0 && e->timestamp == ast->frame_offset){
7c7f3866
MN
623 if (e->flags & AVINDEX_KEYFRAME)
624 pkt->flags |= PKT_FLAG_KEY;
625 }
626 } else {
627 /* if no index, better to say that all frames
628 are key frames */
629 pkt->flags |= PKT_FLAG_KEY;
630 }
631 } else {
115329f1 632 pkt->flags |= PKT_FLAG_KEY;
7c7f3866
MN
633 }
634 if(ast->sample_size)
635 ast->frame_offset += pkt->size;
636 else
637 ast->frame_offset++;
638 }
639 ast->remaining -= size;
640 if(!ast->remaining){
641 avi->stream_index= -1;
642 ast->packet_size= 0;
643 if (size & 1) {
644 get_byte(pb);
645 size++;
646 }
647 }
648
649 return size;
650 }
651
4a8d5135
MN
652 memset(d, -1, sizeof(int)*8);
653 for(i=sync=url_ftell(pb); !url_feof(pb); i++) {
df99755b 654 int j;
1101abfe 655
bb270c08
DB
656 if (i >= avi->movi_end) {
657 if (avi->is_odml) {
658 url_fskip(pb, avi->riff_end - i);
659 avi->riff_end = avi->movi_end = url_fsize(pb);
660 } else
661 break;
662 }
06219cb1 663
df99755b
MN
664 for(j=0; j<7; j++)
665 d[j]= d[j+1];
666 d[7]= get_byte(pb);
115329f1 667
df99755b 668 size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
115329f1 669
df99755b 670 if( d[2] >= '0' && d[2] <= '9'
d2c5f0a4
MN
671 && d[3] >= '0' && d[3] <= '9'){
672 n= (d[2] - '0') * 10 + (d[3] - '0');
673 }else{
674 n= 100; //invalid stream id
df99755b 675 }
949b1a13 676//av_log(NULL, 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);
d2c5f0a4
MN
677 if(i + size > avi->movi_end || d[0]<0)
678 continue;
115329f1 679
d2c5f0a4
MN
680 //parse ix##
681 if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams)
bb270c08 682 //parse JUNK
d2c5f0a4 683 ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')){
8f9298f8 684 url_fskip(pb, size);
d2c5f0a4 685//av_log(NULL, AV_LOG_DEBUG, "SKIP\n");
4a8d5135 686 goto resync;
8f9298f8 687 }
d2c5f0a4 688
df99755b 689 if( d[0] >= '0' && d[0] <= '9'
d2c5f0a4
MN
690 && d[1] >= '0' && d[1] <= '9'){
691 n= (d[0] - '0') * 10 + (d[1] - '0');
692 }else{
693 n= 100; //invalid stream id
694 }
115329f1 695
d2c5f0a4 696 //parse ##dc/##wb
80e3a08c 697 if(n < s->nb_streams){
d2c5f0a4
MN
698 AVStream *st;
699 AVIStream *ast;
700 st = s->streams[n];
701 ast = st->priv_data;
115329f1 702
f3356e9c
MN
703 if( (st->discard >= AVDISCARD_DEFAULT && size==0)
704 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
705 || st->discard >= AVDISCARD_ALL){
706 if(ast->sample_size) ast->frame_offset += pkt->size;
707 else ast->frame_offset++;
b4aea108
MN
708 url_fskip(pb, size);
709 goto resync;
710 }
d2c5f0a4 711
115329f1 712 if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
d2c5f0a4 713 d[2]*256+d[3] == ast->prefix /*||
115329f1 714 (d[2] == 'd' && d[3] == 'c') ||
bb270c08 715 (d[2] == 'w' && d[3] == 'b')*/) {
d2c5f0a4
MN
716
717//av_log(NULL, AV_LOG_DEBUG, "OK\n");
718 if(d[2]*256+d[3] == ast->prefix)
719 ast->prefix_count++;
720 else{
721 ast->prefix= d[2]*256+d[3];
722 ast->prefix_count= 0;
723 }
724
7c7f3866
MN
725 avi->stream_index= n;
726 ast->packet_size= size + 8;
727 ast->remaining= size;
728 goto resync;
d2c5f0a4 729 }
df99755b 730 }
69bde0b2
MM
731 /* palette changed chunk */
732 if ( d[0] >= '0' && d[0] <= '9'
733 && d[1] >= '0' && d[1] <= '9'
734 && ((d[2] == 'p' && d[3] == 'c'))
735 && n < s->nb_streams && i + size <= avi->movi_end) {
736
737 AVStream *st;
738 int first, clr, flags, k, p;
739
740 st = s->streams[n];
741
742 first = get_byte(pb);
743 clr = get_byte(pb);
bb270c08
DB
744 if(!clr) /* all 256 colors used */
745 clr = 256;
69bde0b2
MM
746 flags = get_le16(pb);
747 p = 4;
748 for (k = first; k < clr + first; k++) {
749 int r, g, b;
750 r = get_byte(pb);
751 g = get_byte(pb);
752 b = get_byte(pb);
753 get_byte(pb);
01f4895c 754 st->codec->palctrl->palette[k] = b + (g << 8) + (r << 16);
69bde0b2 755 }
01f4895c 756 st->codec->palctrl->palette_changed = 1;
4a8d5135 757 goto resync;
69bde0b2
MM
758 }
759
df99755b 760 }
d2c5f0a4 761
df99755b 762 return -1;
de6d9b64
FB
763}
764
155e9ee9
FB
765/* XXX: we make the implicit supposition that the position are sorted
766 for each stream */
767static int avi_read_idx1(AVFormatContext *s, int size)
768{
7c7f3866 769 AVIContext *avi = s->priv_data;
155e9ee9
FB
770 ByteIOContext *pb = &s->pb;
771 int nb_index_entries, i;
772 AVStream *st;
773 AVIStream *ast;
155e9ee9 774 unsigned int index, tag, flags, pos, len;
7c7f3866 775 unsigned last_pos= -1;
115329f1 776
155e9ee9
FB
777 nb_index_entries = size / 16;
778 if (nb_index_entries <= 0)
779 return -1;
780
781 /* read the entries and sort them in each stream component */
782 for(i = 0; i < nb_index_entries; i++) {
783 tag = get_le32(pb);
784 flags = get_le32(pb);
785 pos = get_le32(pb);
786 len = get_le32(pb);
52a0bbff 787#if defined(DEBUG_SEEK)
115329f1 788 av_log(NULL, AV_LOG_DEBUG, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
155e9ee9
FB
789 i, tag, flags, pos, len);
790#endif
7c7f3866
MN
791 if(i==0 && pos > avi->movi_list)
792 avi->movi_list= 0; //FIXME better check
5c89153e 793 pos += avi->movi_list;
7c7f3866 794
155e9ee9
FB
795 index = ((tag & 0xff) - '0') * 10;
796 index += ((tag >> 8) & 0xff) - '0';
797 if (index >= s->nb_streams)
798 continue;
799 st = s->streams[index];
800 ast = st->priv_data;
115329f1 801
52a0bbff 802#if defined(DEBUG_SEEK)
949b1a13 803 av_log(NULL, AV_LOG_DEBUG, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
52a0bbff 804#endif
80e3a08c
MN
805 if(last_pos == pos)
806 avi->non_interleaved= 1;
807 else
2b70eb2b 808 av_add_index_entry(st, pos, ast->cum_len / FFMAX(1, ast->sample_size), len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
7c7f3866 809 if(ast->sample_size)
2b70eb2b 810 ast->cum_len += len;
7c7f3866
MN
811 else
812 ast->cum_len ++;
7c7f3866 813 last_pos= pos;
155e9ee9
FB
814 }
815 return 0;
816}
817
7c7f3866 818static int guess_ni_flag(AVFormatContext *s){
7c7f3866
MN
819 int i;
820 int64_t last_start=0;
821 int64_t first_end= INT64_MAX;
115329f1 822
7c7f3866
MN
823 for(i=0; i<s->nb_streams; i++){
824 AVStream *st = s->streams[i];
7c7f3866
MN
825 int n= st->nb_index_entries;
826
827 if(n <= 0)
828 continue;
829
830 if(st->index_entries[0].pos > last_start)
831 last_start= st->index_entries[0].pos;
832 if(st->index_entries[n-1].pos < first_end)
833 first_end= st->index_entries[n-1].pos;
834 }
835 return last_start > first_end;
836}
837
155e9ee9
FB
838static int avi_load_index(AVFormatContext *s)
839{
840 AVIContext *avi = s->priv_data;
841 ByteIOContext *pb = &s->pb;
842 uint32_t tag, size;
e6c0297f 843 offset_t pos= url_ftell(pb);
115329f1 844
155e9ee9
FB
845 url_fseek(pb, avi->movi_end, SEEK_SET);
846#ifdef DEBUG_SEEK
949b1a13 847 printf("movi_end=0x%"PRIx64"\n", avi->movi_end);
155e9ee9
FB
848#endif
849 for(;;) {
850 if (url_feof(pb))
851 break;
852 tag = get_le32(pb);
853 size = get_le32(pb);
854#ifdef DEBUG_SEEK
855 printf("tag=%c%c%c%c size=0x%x\n",
856 tag & 0xff,
857 (tag >> 8) & 0xff,
858 (tag >> 16) & 0xff,
859 (tag >> 24) & 0xff,
860 size);
861#endif
862 switch(tag) {
863 case MKTAG('i', 'd', 'x', '1'):
864 if (avi_read_idx1(s, size) < 0)
865 goto skip;
866 else
867 goto the_end;
868 break;
869 default:
870 skip:
871 size += (size & 1);
872 url_fskip(pb, size);
873 break;
874 }
875 }
876 the_end:
e6c0297f 877 url_fseek(pb, pos, SEEK_SET);
155e9ee9
FB
878 return 0;
879}
880
7b3c1382 881static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
155e9ee9
FB
882{
883 AVIContext *avi = s->priv_data;
884 AVStream *st;
52a0bbff 885 int i, index;
155e9ee9
FB
886 int64_t pos;
887
888 if (!avi->index_loaded) {
889 /* we only load the index on demand */
890 avi_load_index(s);
891 avi->index_loaded = 1;
892 }
52a0bbff 893 assert(stream_index>= 0);
155e9ee9
FB
894
895 st = s->streams[stream_index];
52a0bbff
MN
896 index= av_index_search_timestamp(st, timestamp, flags);
897 if(index<0)
155e9ee9 898 return -1;
115329f1 899
155e9ee9 900 /* find the position */
52a0bbff
MN
901 pos = st->index_entries[index].pos;
902 timestamp = st->index_entries[index].timestamp;
903
949b1a13 904// av_log(NULL, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
155e9ee9 905
155e9ee9 906 for(i = 0; i < s->nb_streams; i++) {
52a0bbff
MN
907 AVStream *st2 = s->streams[i];
908 AVIStream *ast2 = st2->priv_data;
7c7f3866
MN
909
910 ast2->packet_size=
911 ast2->remaining= 0;
912
52a0bbff
MN
913 if (st2->nb_index_entries <= 0)
914 continue;
115329f1 915
e84dab5f 916// assert(st2->codec->block_align);
52a0bbff
MN
917 assert(st2->time_base.den == ast2->rate);
918 assert(st2->time_base.num == ast2->scale);
919 index = av_index_search_timestamp(
115329f1 920 st2,
52a0bbff
MN
921 av_rescale(timestamp, st2->time_base.den*(int64_t)st->time_base.num, st->time_base.den * (int64_t)st2->time_base.num),
922 flags | AVSEEK_FLAG_BACKWARD);
923 if(index<0)
924 index=0;
115329f1 925
7c7f3866
MN
926 if(!avi->non_interleaved){
927 while(index>0 && st2->index_entries[index].pos > pos)
928 index--;
929 while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
930 index++;
931 }
932
949b1a13 933// av_log(NULL, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
52a0bbff
MN
934 /* extract the current frame number */
935 ast2->frame_offset = st2->index_entries[index].timestamp;
936 if(ast2->sample_size)
937 ast2->frame_offset *=ast2->sample_size;
155e9ee9 938 }
52a0bbff 939
a2a6332b 940 if (ENABLE_DV_DEMUXER && avi->dv_demux)
664f5836 941 dv_flush_audio_packets(avi->dv_demux);
155e9ee9 942 /* do the seek */
155e9ee9 943 url_fseek(&s->pb, pos, SEEK_SET);
7c7f3866 944 avi->stream_index= -1;
155e9ee9
FB
945 return 0;
946}
947
1101abfe 948static int avi_read_close(AVFormatContext *s)
de6d9b64 949{
5ae2c73e
MN
950 int i;
951 AVIContext *avi = s->priv_data;
5ae2c73e
MN
952
953 for(i=0;i<s->nb_streams;i++) {
954 AVStream *st = s->streams[i];
155e9ee9 955 AVIStream *ast = st->priv_data;
52a0bbff 956 av_free(ast);
01f4895c 957 av_free(st->codec->palctrl);
5ae2c73e
MN
958 }
959
7458ccbb
RS
960 if (avi->dv_demux)
961 av_free(avi->dv_demux);
962
c9a65ca8
FB
963 return 0;
964}
965
966static int avi_probe(AVProbeData *p)
967{
968 /* check file header */
969 if (p->buf_size <= 32)
970 return 0;
971 if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
972 p->buf[2] == 'F' && p->buf[3] == 'F' &&
973 p->buf[8] == 'A' && p->buf[9] == 'V' &&
974 p->buf[10] == 'I' && p->buf[11] == ' ')
975 return AVPROBE_SCORE_MAX;
976 else
977 return 0;
978}
979
ff70e601 980AVInputFormat avi_demuxer = {
c9a65ca8
FB
981 "avi",
982 "avi format",
983 sizeof(AVIContext),
984 avi_probe,
985 avi_read_header,
986 avi_read_packet,
987 avi_read_close,
155e9ee9 988 avi_read_seek,
c9a65ca8 989};