Explicitly include libmpcodecs/img_format.h and libvo/fastmemcpy.h.
[libav.git] / libavformat / avidec.c
CommitLineData
de6d9b64
FB
1/*
2 * AVI decoder.
19720f15 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
19720f15
FB
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.
de6d9b64 9 *
19720f15 10 * This library is distributed in the hope that it will be useful,
de6d9b64 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
FB
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
19720f15
FB
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
5509bffa 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 18 */
de6d9b64
FB
19#include "avformat.h"
20#include "avi.h"
7458ccbb 21#include "dv.h"
9d9f4119 22#include "riff.h"
de6d9b64 23
52a0bbff
MN
24#undef NDEBUG
25#include <assert.h>
26
de6d9b64 27//#define DEBUG
155e9ee9
FB
28//#define DEBUG_SEEK
29
155e9ee9 30typedef struct AVIStream {
7c7f3866 31 int64_t frame_offset; /* current frame (video) or byte (audio) counter
155e9ee9 32 (used to compute the pts) */
7c7f3866
MN
33 int remaining;
34 int packet_size;
35
155e9ee9 36 int scale;
115329f1 37 int rate;
8223bca5 38 int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
115329f1 39
94d1d6c0 40 int64_t cum_len; /* temporary storage (used during seek) */
115329f1 41
d2c5f0a4
MN
42 int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
43 int prefix_count;
155e9ee9 44} AVIStream;
de6d9b64
FB
45
46typedef struct {
7458ccbb
RS
47 int64_t riff_end;
48 int64_t movi_end;
de6d9b64 49 offset_t movi_list;
155e9ee9 50 int index_loaded;
8f9298f8 51 int is_odml;
7c7f3866
MN
52 int non_interleaved;
53 int stream_index;
ddaae6a9 54 DVDemuxContext* dv_demux;
de6d9b64
FB
55} AVIContext;
56
42feef6b 57static int avi_load_index(AVFormatContext *s);
30a43f2d 58static int guess_ni_flag(AVFormatContext *s);
42feef6b 59
de6d9b64 60#ifdef DEBUG
1101abfe 61static void print_tag(const char *str, unsigned int tag, int size)
de6d9b64
FB
62{
63 printf("%s: tag=%c%c%c%c size=0x%x\n",
64 str, tag & 0xff,
65 (tag >> 8) & 0xff,
66 (tag >> 16) & 0xff,
67 (tag >> 24) & 0xff,
68 size);
69}
70#endif
71
06219cb1
RS
72static int get_riff(AVIContext *avi, ByteIOContext *pb)
73{
115329f1 74 uint32_t tag;
06219cb1
RS
75 /* check RIFF header */
76 tag = get_le32(pb);
77
78 if (tag != MKTAG('R', 'I', 'F', 'F'))
79 return -1;
80 avi->riff_end = get_le32(pb); /* RIFF chunk size */
81 avi->riff_end += url_ftell(pb); /* RIFF chunk end */
82 tag = get_le32(pb);
83 if (tag != MKTAG('A', 'V', 'I', ' ') && tag != MKTAG('A', 'V', 'I', 'X'))
84 return -1;
115329f1 85
06219cb1
RS
86 return 0;
87}
88
94d1d6c0 89static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
8945ebb9 90 AVIContext *avi = s->priv_data;
94d1d6c0
MN
91 ByteIOContext *pb = &s->pb;
92 int longs_pre_entry= get_le16(pb);
93 int index_sub_type = get_byte(pb);
94 int index_type = get_byte(pb);
95 int entries_in_use = get_le32(pb);
96 int chunk_id = get_le32(pb);
97 int64_t base = get_le64(pb);
98 int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
99 AVStream *st;
100 AVIStream *ast;
101 int i;
8945ebb9 102 int64_t last_pos= -1;
94d1d6c0
MN
103
104// av_log(s, AV_LOG_ERROR, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%Ld\n",
105// longs_pre_entry,index_type, entries_in_use, chunk_id, base);
106
107 if(stream_id > s->nb_streams || stream_id < 0)
108 return -1;
109 st= s->streams[stream_id];
110 ast = st->priv_data;
111
112 if(index_sub_type)
113 return -1;
114
115 get_le32(pb);
116
117 if(index_type && longs_pre_entry != 2)
118 return -1;
119 if(index_type>1)
120 return -1;
121
122 for(i=0; i<entries_in_use; i++){
123 if(index_type){
30a43f2d 124 int64_t pos= get_le32(pb) + base - 8;
94d1d6c0 125 int len = get_le32(pb);
30a43f2d 126 int key= len >= 0;
94d1d6c0
MN
127 len &= 0x7FFFFFFF;
128
30a43f2d 129//av_log(s, AV_LOG_ERROR, "pos:%Ld, len:%X\n", pos, len);
8945ebb9
MN
130 if(last_pos == pos || pos == base - 8)
131 avi->non_interleaved= 1;
132 else
133 av_add_index_entry(st, pos, ast->cum_len, len, 0, key ? AVINDEX_KEYFRAME : 0);
30a43f2d 134
94d1d6c0
MN
135 if(ast->sample_size)
136 ast->cum_len += len / ast->sample_size;
137 else
138 ast->cum_len ++;
8945ebb9 139 last_pos= pos;
94d1d6c0 140 }else{
26b89135
MR
141 int64_t offset, pos;
142 int duration;
143 offset = get_le64(pb);
144 get_le32(pb); /* size */
145 duration = get_le32(pb);
146 pos = url_ftell(pb);
94d1d6c0
MN
147
148 url_fseek(pb, offset+8, SEEK_SET);
149 read_braindead_odml_indx(s, frame_num);
150 frame_num += duration;
151
152 url_fseek(pb, pos, SEEK_SET);
153 }
154 }
155 return 0;
156}
157
115e8ae5
MN
158static void clean_index(AVFormatContext *s){
159 int i, j;
160
161 for(i=0; i<s->nb_streams; i++){
162 AVStream *st = s->streams[i];
163 AVIStream *ast = st->priv_data;
164 int n= st->nb_index_entries;
165 int max= ast->sample_size;
166 int64_t pos, size, ts;
167
168 if(n != 1 || ast->sample_size==0)
169 continue;
170
171 while(max < 1024) max+=max;
172
173 pos= st->index_entries[0].pos;
174 size= st->index_entries[0].size;
175 ts= st->index_entries[0].timestamp;
176
177 for(j=0; j<size; j+=max){
178 av_add_index_entry(st, pos+j, ts + j/ast->sample_size, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME);
179 }
180 }
181}
182
1101abfe 183static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
de6d9b64 184{
c9a65ca8 185 AVIContext *avi = s->priv_data;
de6d9b64 186 ByteIOContext *pb = &s->pb;
deb0a292 187 uint32_t tag, tag1, handler;
b53f1064 188 int codec_type, stream_index, frame_period, bit_rate;
247eadca
FB
189 unsigned int size, nb_frames;
190 int i, n;
de6d9b64 191 AVStream *st;
26b89135 192 AVIStream *ast = NULL;
9e8cd0db 193 int xan_video = 0; /* hack to support Xan A/V */
de6d9b64 194
7c7f3866 195 avi->stream_index= -1;
115329f1 196
06219cb1 197 if (get_riff(avi, pb) < 0)
de6d9b64 198 return -1;
1101abfe 199
de6d9b64
FB
200 /* first list tag */
201 stream_index = -1;
202 codec_type = -1;
203 frame_period = 0;
204 for(;;) {
205 if (url_feof(pb))
206 goto fail;
207 tag = get_le32(pb);
208 size = get_le32(pb);
209#ifdef DEBUG
210 print_tag("tag", tag, size);
211#endif
212
213 switch(tag) {
214 case MKTAG('L', 'I', 'S', 'T'):
215 /* ignored, except when start of video packets */
216 tag1 = get_le32(pb);
217#ifdef DEBUG
218 print_tag("list", tag1, 0);
219#endif
220 if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
155e9ee9 221 avi->movi_list = url_ftell(pb) - 4;
f8facaaf 222 if(size) avi->movi_end = avi->movi_list + size;
a965c478 223 else avi->movi_end = url_fsize(pb);
de6d9b64
FB
224#ifdef DEBUG
225 printf("movi end=%Lx\n", avi->movi_end);
226#endif
227 goto end_of_header;
228 }
229 break;
8f9298f8 230 case MKTAG('d', 'm', 'l', 'h'):
bb270c08
DB
231 avi->is_odml = 1;
232 url_fskip(pb, size + (size & 1));
233 break;
de6d9b64 234 case MKTAG('a', 'v', 'i', 'h'):
bb270c08 235 /* avi header */
1101abfe 236 /* using frame_period is bad idea */
de6d9b64
FB
237 frame_period = get_le32(pb);
238 bit_rate = get_le32(pb) * 8;
1894edeb
MN
239 get_le32(pb);
240 avi->non_interleaved |= get_le32(pb) & AVIF_MUSTUSEINDEX;
241
242 url_fskip(pb, 2 * 4);
247eadca
FB
243 n = get_le32(pb);
244 for(i=0;i<n;i++) {
155e9ee9 245 AVIStream *ast;
7458ccbb 246 st = av_new_stream(s, i);
de6d9b64
FB
247 if (!st)
248 goto fail;
9ee91c2f 249
155e9ee9
FB
250 ast = av_mallocz(sizeof(AVIStream));
251 if (!ast)
252 goto fail;
253 st->priv_data = ast;
bb270c08 254 }
de6d9b64
FB
255 url_fskip(pb, size - 7 * 4);
256 break;
257 case MKTAG('s', 't', 'r', 'h'):
258 /* stream header */
259 stream_index++;
260 tag1 = get_le32(pb);
7458ccbb 261 handler = get_le32(pb); /* codec tag */
cc11e2b3
MN
262#ifdef DEBUG
263 print_tag("strh", tag1, -1);
264#endif
b53f1064 265 if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
115329f1 266 /*
bb270c08
DB
267 * After some consideration -- I don't think we
268 * have to support anything but DV in a type1 AVIs.
269 */
270 if (s->nb_streams != 1)
271 goto fail;
272
273 if (handler != MKTAG('d', 'v', 's', 'd') &&
274 handler != MKTAG('d', 'v', 'h', 'd') &&
275 handler != MKTAG('d', 'v', 's', 'l'))
276 goto fail;
277
278 ast = s->streams[0]->priv_data;
279 av_freep(&s->streams[0]->codec->extradata);
280 av_freep(&s->streams[0]);
281 s->nb_streams = 0;
282 avi->dv_demux = dv_init_demux(s);
283 if (!avi->dv_demux)
284 goto fail;
285 s->streams[0]->priv_data = ast;
286 url_fskip(pb, 3 * 4);
287 ast->scale = get_le32(pb);
288 ast->rate = get_le32(pb);
289 stream_index = s->nb_streams - 1;
290 url_fskip(pb, size - 7*4);
b53f1064
MN
291 break;
292 }
b559b29b 293
b53f1064
MN
294 if (stream_index >= s->nb_streams) {
295 url_fskip(pb, size - 8);
1c6606e2
KS
296 /* ignore padding stream */
297 if (tag1 == MKTAG('p', 'a', 'd', 's'))
298 stream_index--;
b53f1064 299 break;
115329f1 300 }
b53f1064
MN
301 st = s->streams[stream_index];
302 ast = st->priv_data;
01f4895c 303 st->codec->stream_codec_tag= handler;
b559b29b 304
b53f1064
MN
305 get_le32(pb); /* flags */
306 get_le16(pb); /* priority */
307 get_le16(pb); /* language */
308 get_le32(pb); /* initial frame */
309 ast->scale = get_le32(pb);
310 ast->rate = get_le32(pb);
311 if(ast->scale && ast->rate){
312 }else if(frame_period){
313 ast->rate = 1000000;
314 ast->scale = frame_period;
315 }else{
316 ast->rate = 25;
317 ast->scale = 1;
318 }
319 av_set_pts_info(st, 64, ast->scale, ast->rate);
115329f1 320
b72a2bc8 321 ast->cum_len=get_le32(pb); /* start */
b53f1064 322 nb_frames = get_le32(pb);
b559b29b 323
b53f1064 324 st->start_time = 0;
c0df9d75 325 st->duration = nb_frames;
b53f1064
MN
326 get_le32(pb); /* buffer size */
327 get_le32(pb); /* quality */
328 ast->sample_size = get_le32(pb); /* sample ssize */
329// av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
247eadca 330
b53f1064 331 switch(tag1) {
bb270c08 332 case MKTAG('v', 'i', 'd', 's'):
b53f1064 333 codec_type = CODEC_TYPE_VIDEO;
247eadca 334
b53f1064 335 ast->sample_size = 0;
b53f1064
MN
336 break;
337 case MKTAG('a', 'u', 'd', 's'):
338 codec_type = CODEC_TYPE_AUDIO;
9bf9a5fc 339 break;
cc11e2b3 340 case MKTAG('t', 'x', 't', 's'):
115329f1 341 //FIXME
cc11e2b3 342 codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
cc11e2b3 343 break;
30667f42
MN
344 case MKTAG('p', 'a', 'd', 's'):
345 codec_type = CODEC_TYPE_UNKNOWN;
30667f42
MN
346 stream_index--;
347 break;
9bf9a5fc 348 default:
30667f42 349 av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
9bf9a5fc 350 goto fail;
de6d9b64 351 }
b72a2bc8 352 ast->frame_offset= ast->cum_len * FFMAX(ast->sample_size, 1);
b53f1064 353 url_fskip(pb, size - 12 * 4);
de6d9b64
FB
354 break;
355 case MKTAG('s', 't', 'r', 'f'):
356 /* stream header */
7458ccbb 357 if (stream_index >= s->nb_streams || avi->dv_demux) {
de6d9b64
FB
358 url_fskip(pb, size);
359 } else {
360 st = s->streams[stream_index];
361 switch(codec_type) {
362 case CODEC_TYPE_VIDEO:
363 get_le32(pb); /* size */
01f4895c
MN
364 st->codec->width = get_le32(pb);
365 st->codec->height = get_le32(pb);
de6d9b64 366 get_le16(pb); /* panes */
01f4895c 367 st->codec->bits_per_sample= get_le16(pb); /* depth */
de6d9b64 368 tag1 = get_le32(pb);
b559b29b
MN
369 get_le32(pb); /* ImageSize */
370 get_le32(pb); /* XPelsPerMeter */
371 get_le32(pb); /* YPelsPerMeter */
372 get_le32(pb); /* ClrUsed */
373 get_le32(pb); /* ClrImportant */
374
568e18b1 375 if(size > 10*4 && size<(1<<30)){
01f4895c
MN
376 st->codec->extradata_size= size - 10*4;
377 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
378 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
568e18b1 379 }
115329f1 380
01f4895c 381 if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
952c69c4 382 get_byte(pb);
b559b29b 383
5e29abf8
RT
384 /* Extract palette from extradata if bpp <= 8 */
385 /* This code assumes that extradata contains only palette */
386 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
387 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
388 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 389#ifdef WORDS_BIGENDIAN
01f4895c
MN
390 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
391 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 392#else
01f4895c
MN
393 memcpy(st->codec->palctrl->palette, st->codec->extradata,
394 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 395#endif
01f4895c 396 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
397 }
398
de6d9b64
FB
399#ifdef DEBUG
400 print_tag("video", tag1, 0);
401#endif
01f4895c
MN
402 st->codec->codec_type = CODEC_TYPE_VIDEO;
403 st->codec->codec_tag = tag1;
404 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
405 if (st->codec->codec_id == CODEC_ID_XAN_WC4)
9e8cd0db 406 xan_video = 1;
7cbaa7ba 407 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 408// url_fskip(pb, size - 5 * 4);
de6d9b64 409 break;
9bf9a5fc 410 case CODEC_TYPE_AUDIO:
01f4895c 411 get_wav_header(pb, st->codec, size);
e84dab5f
MN
412 if(ast->sample_size && st->codec->block_align && ast->sample_size % st->codec->block_align)
413 av_log(s, AV_LOG_DEBUG, "invalid sample size or block align detected\n");
1cef9527
FR
414 if (size%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
415 url_fskip(pb, 1);
9e8cd0db
MM
416 /* special case time: To support Xan DPCM, hardcode
417 * the format if Xxan is the video codec */
155e9ee9
FB
418 st->need_parsing = 1;
419 /* force parsing as several audio frames can be in
420 one packet */
9e8cd0db 421 if (xan_video)
01f4895c 422 st->codec->codec_id = CODEC_ID_XAN_DPCM;
de6d9b64
FB
423 break;
424 default:
01f4895c
MN
425 st->codec->codec_type = CODEC_TYPE_DATA;
426 st->codec->codec_id= CODEC_ID_NONE;
427 st->codec->codec_tag= 0;
de6d9b64
FB
428 url_fskip(pb, size);
429 break;
430 }
431 }
432 break;
94d1d6c0
MN
433 case MKTAG('i', 'n', 'd', 'x'):
434 i= url_ftell(pb);
b7b22558
MN
435 if(!url_is_streamed(pb)){
436 read_braindead_odml_indx(s, 0);
437 avi->index_loaded=1;
438 }
94d1d6c0
MN
439 url_fseek(pb, i+size, SEEK_SET);
440 break;
de6d9b64
FB
441 default:
442 /* skip tag */
443 size += (size & 1);
444 url_fskip(pb, size);
445 break;
446 }
447 }
448 end_of_header:
449 /* check stream number */
450 if (stream_index != s->nb_streams - 1) {
451 fail:
452 for(i=0;i<s->nb_streams;i++) {
01f4895c 453 av_freep(&s->streams[i]->codec->extradata);
9145f8b3 454 av_freep(&s->streams[i]);
de6d9b64
FB
455 }
456 return -1;
457 }
1101abfe 458
b7b22558 459 if(!avi->index_loaded && !url_is_streamed(pb))
94d1d6c0 460 avi_load_index(s);
42feef6b 461 avi->index_loaded = 1;
30a43f2d 462 avi->non_interleaved |= guess_ni_flag(s);
115e8ae5
MN
463 if(avi->non_interleaved)
464 clean_index(s);
115329f1 465
de6d9b64
FB
466 return 0;
467}
468
1101abfe 469static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64
FB
470{
471 AVIContext *avi = s->priv_data;
472 ByteIOContext *pb = &s->pb;
8f9298f8 473 int n, d[8], size;
4a8d5135 474 offset_t i, sync;
7458ccbb 475 void* dstr;
115329f1 476
7458ccbb
RS
477 if (avi->dv_demux) {
478 size = dv_get_packet(avi->dv_demux, pkt);
bb270c08
DB
479 if (size >= 0)
480 return size;
2af7e610 481 }
115329f1 482
7c7f3866 483 if(avi->non_interleaved){
79396ac6 484 int best_stream_index = 0;
7c7f3866
MN
485 AVStream *best_st= NULL;
486 AVIStream *best_ast;
487 int64_t best_ts= INT64_MAX;
488 int i;
115329f1 489
7c7f3866
MN
490 for(i=0; i<s->nb_streams; i++){
491 AVStream *st = s->streams[i];
492 AVIStream *ast = st->priv_data;
493 int64_t ts= ast->frame_offset;
494
495 if(ast->sample_size)
496 ts /= ast->sample_size;
497 ts= av_rescale(ts, AV_TIME_BASE * (int64_t)st->time_base.num, st->time_base.den);
498
499// av_log(NULL, AV_LOG_DEBUG, "%Ld %d/%d %Ld\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
500 if(ts < best_ts){
501 best_ts= ts;
502 best_st= st;
503 best_stream_index= i;
504 }
505 }
506 best_ast = best_st->priv_data;
507 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
508 if(best_ast->remaining)
509 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
510 else
511 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
512
513// av_log(NULL, AV_LOG_DEBUG, "%d\n", i);
514 if(i>=0){
515 int64_t pos= best_st->index_entries[i].pos;
5c89153e 516 pos += best_ast->packet_size - best_ast->remaining;
1894edeb 517 url_fseek(&s->pb, pos + 8, SEEK_SET);
7c7f3866 518// av_log(NULL, AV_LOG_DEBUG, "pos=%Ld\n", pos);
115329f1 519
8223bca5
MN
520 assert(best_ast->remaining <= best_ast->packet_size);
521
1894edeb
MN
522 avi->stream_index= best_stream_index;
523 if(!best_ast->remaining)
8223bca5 524 best_ast->packet_size=
1894edeb 525 best_ast->remaining= best_st->index_entries[i].size;
7c7f3866
MN
526 }
527 }
115329f1 528
4a8d5135 529resync:
7c7f3866
MN
530 if(avi->stream_index >= 0){
531 AVStream *st= s->streams[ avi->stream_index ];
532 AVIStream *ast= st->priv_data;
533 int size;
115329f1 534
e84dab5f 535 if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
7c7f3866 536 size= INT_MAX;
115329f1 537 else if(ast->sample_size < 32)
7c7f3866
MN
538 size= 64*ast->sample_size;
539 else
540 size= ast->sample_size;
541
542 if(size > ast->remaining)
543 size= ast->remaining;
2692067a 544 av_get_packet(pb, pkt, size);
115329f1 545
7c7f3866
MN
546 if (avi->dv_demux) {
547 dstr = pkt->destruct;
548 size = dv_produce_packet(avi->dv_demux, pkt,
549 pkt->data, pkt->size);
550 pkt->destruct = dstr;
551 pkt->flags |= PKT_FLAG_KEY;
552 } else {
553 /* XXX: how to handle B frames in avi ? */
554 pkt->dts = ast->frame_offset;
555// pkt->dts += ast->start;
556 if(ast->sample_size)
557 pkt->dts /= ast->sample_size;
8223bca5 558//av_log(NULL, AV_LOG_DEBUG, "dts:%Ld offset:%Ld %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
559 pkt->stream_index = avi->stream_index;
560
01f4895c 561 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
7c7f3866
MN
562 if(st->index_entries){
563 AVIndexEntry *e;
564 int index;
565
566 index= av_index_search_timestamp(st, pkt->dts, 0);
567 e= &st->index_entries[index];
115329f1 568
d46db490 569 if(index >= 0 && e->timestamp == ast->frame_offset){
7c7f3866
MN
570 if (e->flags & AVINDEX_KEYFRAME)
571 pkt->flags |= PKT_FLAG_KEY;
572 }
573 } else {
574 /* if no index, better to say that all frames
575 are key frames */
576 pkt->flags |= PKT_FLAG_KEY;
577 }
578 } else {
115329f1 579 pkt->flags |= PKT_FLAG_KEY;
7c7f3866
MN
580 }
581 if(ast->sample_size)
582 ast->frame_offset += pkt->size;
583 else
584 ast->frame_offset++;
585 }
586 ast->remaining -= size;
587 if(!ast->remaining){
588 avi->stream_index= -1;
589 ast->packet_size= 0;
590 if (size & 1) {
591 get_byte(pb);
592 size++;
593 }
594 }
595
596 return size;
597 }
598
4a8d5135
MN
599 memset(d, -1, sizeof(int)*8);
600 for(i=sync=url_ftell(pb); !url_feof(pb); i++) {
df99755b 601 int j;
1101abfe 602
bb270c08
DB
603 if (i >= avi->movi_end) {
604 if (avi->is_odml) {
605 url_fskip(pb, avi->riff_end - i);
606 avi->riff_end = avi->movi_end = url_fsize(pb);
607 } else
608 break;
609 }
06219cb1 610
df99755b
MN
611 for(j=0; j<7; j++)
612 d[j]= d[j+1];
613 d[7]= get_byte(pb);
115329f1 614
df99755b 615 size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
115329f1 616
df99755b 617 if( d[2] >= '0' && d[2] <= '9'
d2c5f0a4
MN
618 && d[3] >= '0' && d[3] <= '9'){
619 n= (d[2] - '0') * 10 + (d[3] - '0');
620 }else{
621 n= 100; //invalid stream id
df99755b 622 }
d2c5f0a4
MN
623//av_log(NULL, AV_LOG_DEBUG, "%X %X %X %X %X %X %X %X %lld %d %d\n", d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
624 if(i + size > avi->movi_end || d[0]<0)
625 continue;
115329f1 626
d2c5f0a4
MN
627 //parse ix##
628 if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams)
bb270c08 629 //parse JUNK
d2c5f0a4 630 ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')){
8f9298f8 631 url_fskip(pb, size);
d2c5f0a4 632//av_log(NULL, AV_LOG_DEBUG, "SKIP\n");
4a8d5135 633 goto resync;
8f9298f8 634 }
d2c5f0a4 635
df99755b 636 if( d[0] >= '0' && d[0] <= '9'
d2c5f0a4
MN
637 && d[1] >= '0' && d[1] <= '9'){
638 n= (d[0] - '0') * 10 + (d[1] - '0');
639 }else{
640 n= 100; //invalid stream id
641 }
115329f1 642
d2c5f0a4 643 //parse ##dc/##wb
80e3a08c 644 if(n < s->nb_streams){
d2c5f0a4
MN
645 AVStream *st;
646 AVIStream *ast;
647 st = s->streams[n];
648 ast = st->priv_data;
115329f1 649
f3356e9c
MN
650 if( (st->discard >= AVDISCARD_DEFAULT && size==0)
651 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
652 || st->discard >= AVDISCARD_ALL){
653 if(ast->sample_size) ast->frame_offset += pkt->size;
654 else ast->frame_offset++;
b4aea108
MN
655 url_fskip(pb, size);
656 goto resync;
657 }
d2c5f0a4 658
115329f1 659 if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
d2c5f0a4 660 d[2]*256+d[3] == ast->prefix /*||
115329f1 661 (d[2] == 'd' && d[3] == 'c') ||
bb270c08 662 (d[2] == 'w' && d[3] == 'b')*/) {
d2c5f0a4
MN
663
664//av_log(NULL, AV_LOG_DEBUG, "OK\n");
665 if(d[2]*256+d[3] == ast->prefix)
666 ast->prefix_count++;
667 else{
668 ast->prefix= d[2]*256+d[3];
669 ast->prefix_count= 0;
670 }
671
7c7f3866
MN
672 avi->stream_index= n;
673 ast->packet_size= size + 8;
674 ast->remaining= size;
675 goto resync;
d2c5f0a4 676 }
df99755b 677 }
69bde0b2
MM
678 /* palette changed chunk */
679 if ( d[0] >= '0' && d[0] <= '9'
680 && d[1] >= '0' && d[1] <= '9'
681 && ((d[2] == 'p' && d[3] == 'c'))
682 && n < s->nb_streams && i + size <= avi->movi_end) {
683
684 AVStream *st;
685 int first, clr, flags, k, p;
686
687 st = s->streams[n];
688
689 first = get_byte(pb);
690 clr = get_byte(pb);
bb270c08
DB
691 if(!clr) /* all 256 colors used */
692 clr = 256;
69bde0b2
MM
693 flags = get_le16(pb);
694 p = 4;
695 for (k = first; k < clr + first; k++) {
696 int r, g, b;
697 r = get_byte(pb);
698 g = get_byte(pb);
699 b = get_byte(pb);
700 get_byte(pb);
01f4895c 701 st->codec->palctrl->palette[k] = b + (g << 8) + (r << 16);
69bde0b2 702 }
01f4895c 703 st->codec->palctrl->palette_changed = 1;
4a8d5135 704 goto resync;
69bde0b2
MM
705 }
706
df99755b 707 }
d2c5f0a4 708
df99755b 709 return -1;
de6d9b64
FB
710}
711
155e9ee9
FB
712/* XXX: we make the implicit supposition that the position are sorted
713 for each stream */
714static int avi_read_idx1(AVFormatContext *s, int size)
715{
7c7f3866 716 AVIContext *avi = s->priv_data;
155e9ee9
FB
717 ByteIOContext *pb = &s->pb;
718 int nb_index_entries, i;
719 AVStream *st;
720 AVIStream *ast;
155e9ee9 721 unsigned int index, tag, flags, pos, len;
7c7f3866 722 unsigned last_pos= -1;
115329f1 723
155e9ee9
FB
724 nb_index_entries = size / 16;
725 if (nb_index_entries <= 0)
726 return -1;
727
728 /* read the entries and sort them in each stream component */
729 for(i = 0; i < nb_index_entries; i++) {
730 tag = get_le32(pb);
731 flags = get_le32(pb);
732 pos = get_le32(pb);
733 len = get_le32(pb);
52a0bbff 734#if defined(DEBUG_SEEK)
115329f1 735 av_log(NULL, AV_LOG_DEBUG, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
155e9ee9
FB
736 i, tag, flags, pos, len);
737#endif
7c7f3866
MN
738 if(i==0 && pos > avi->movi_list)
739 avi->movi_list= 0; //FIXME better check
5c89153e 740 pos += avi->movi_list;
7c7f3866 741
155e9ee9
FB
742 index = ((tag & 0xff) - '0') * 10;
743 index += ((tag >> 8) & 0xff) - '0';
744 if (index >= s->nb_streams)
745 continue;
746 st = s->streams[index];
747 ast = st->priv_data;
115329f1 748
52a0bbff
MN
749#if defined(DEBUG_SEEK)
750 av_log(NULL, AV_LOG_DEBUG, "%d cum_len=%d\n", len, ast->cum_len);
751#endif
80e3a08c
MN
752 if(last_pos == pos)
753 avi->non_interleaved= 1;
754 else
30a43f2d 755 av_add_index_entry(st, pos, ast->cum_len, len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
7c7f3866
MN
756 if(ast->sample_size)
757 ast->cum_len += len / ast->sample_size;
758 else
759 ast->cum_len ++;
7c7f3866 760 last_pos= pos;
155e9ee9
FB
761 }
762 return 0;
763}
764
7c7f3866 765static int guess_ni_flag(AVFormatContext *s){
7c7f3866
MN
766 int i;
767 int64_t last_start=0;
768 int64_t first_end= INT64_MAX;
115329f1 769
7c7f3866
MN
770 for(i=0; i<s->nb_streams; i++){
771 AVStream *st = s->streams[i];
7c7f3866
MN
772 int n= st->nb_index_entries;
773
774 if(n <= 0)
775 continue;
776
777 if(st->index_entries[0].pos > last_start)
778 last_start= st->index_entries[0].pos;
779 if(st->index_entries[n-1].pos < first_end)
780 first_end= st->index_entries[n-1].pos;
781 }
782 return last_start > first_end;
783}
784
155e9ee9
FB
785static int avi_load_index(AVFormatContext *s)
786{
787 AVIContext *avi = s->priv_data;
788 ByteIOContext *pb = &s->pb;
789 uint32_t tag, size;
e6c0297f 790 offset_t pos= url_ftell(pb);
115329f1 791
155e9ee9
FB
792 url_fseek(pb, avi->movi_end, SEEK_SET);
793#ifdef DEBUG_SEEK
794 printf("movi_end=0x%llx\n", avi->movi_end);
795#endif
796 for(;;) {
797 if (url_feof(pb))
798 break;
799 tag = get_le32(pb);
800 size = get_le32(pb);
801#ifdef DEBUG_SEEK
802 printf("tag=%c%c%c%c size=0x%x\n",
803 tag & 0xff,
804 (tag >> 8) & 0xff,
805 (tag >> 16) & 0xff,
806 (tag >> 24) & 0xff,
807 size);
808#endif
809 switch(tag) {
810 case MKTAG('i', 'd', 'x', '1'):
811 if (avi_read_idx1(s, size) < 0)
812 goto skip;
813 else
814 goto the_end;
815 break;
816 default:
817 skip:
818 size += (size & 1);
819 url_fskip(pb, size);
820 break;
821 }
822 }
823 the_end:
e6c0297f 824 url_fseek(pb, pos, SEEK_SET);
155e9ee9
FB
825 return 0;
826}
827
7b3c1382 828static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
155e9ee9
FB
829{
830 AVIContext *avi = s->priv_data;
831 AVStream *st;
52a0bbff 832 int i, index;
155e9ee9
FB
833 int64_t pos;
834
835 if (!avi->index_loaded) {
836 /* we only load the index on demand */
837 avi_load_index(s);
838 avi->index_loaded = 1;
839 }
52a0bbff 840 assert(stream_index>= 0);
155e9ee9
FB
841
842 st = s->streams[stream_index];
52a0bbff
MN
843 index= av_index_search_timestamp(st, timestamp, flags);
844 if(index<0)
155e9ee9 845 return -1;
115329f1 846
155e9ee9 847 /* find the position */
52a0bbff
MN
848 pos = st->index_entries[index].pos;
849 timestamp = st->index_entries[index].timestamp;
850
851// av_log(NULL, AV_LOG_DEBUG, "XX %Ld %d %Ld\n", timestamp, index, st->index_entries[index].timestamp);
155e9ee9 852
155e9ee9 853 for(i = 0; i < s->nb_streams; i++) {
52a0bbff
MN
854 AVStream *st2 = s->streams[i];
855 AVIStream *ast2 = st2->priv_data;
7c7f3866
MN
856
857 ast2->packet_size=
858 ast2->remaining= 0;
859
52a0bbff
MN
860 if (st2->nb_index_entries <= 0)
861 continue;
115329f1 862
e84dab5f 863// assert(st2->codec->block_align);
52a0bbff
MN
864 assert(st2->time_base.den == ast2->rate);
865 assert(st2->time_base.num == ast2->scale);
866 index = av_index_search_timestamp(
115329f1 867 st2,
52a0bbff
MN
868 av_rescale(timestamp, st2->time_base.den*(int64_t)st->time_base.num, st->time_base.den * (int64_t)st2->time_base.num),
869 flags | AVSEEK_FLAG_BACKWARD);
870 if(index<0)
871 index=0;
115329f1 872
7c7f3866
MN
873 if(!avi->non_interleaved){
874 while(index>0 && st2->index_entries[index].pos > pos)
875 index--;
876 while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
877 index++;
878 }
879
52a0bbff
MN
880// av_log(NULL, AV_LOG_DEBUG, "%Ld %d %Ld\n", timestamp, index, st2->index_entries[index].timestamp);
881 /* extract the current frame number */
882 ast2->frame_offset = st2->index_entries[index].timestamp;
883 if(ast2->sample_size)
884 ast2->frame_offset *=ast2->sample_size;
155e9ee9 885 }
52a0bbff 886
664f5836
RS
887 if (avi->dv_demux)
888 dv_flush_audio_packets(avi->dv_demux);
155e9ee9 889 /* do the seek */
155e9ee9 890 url_fseek(&s->pb, pos, SEEK_SET);
7c7f3866 891 avi->stream_index= -1;
155e9ee9
FB
892 return 0;
893}
894
1101abfe 895static int avi_read_close(AVFormatContext *s)
de6d9b64 896{
5ae2c73e
MN
897 int i;
898 AVIContext *avi = s->priv_data;
5ae2c73e
MN
899
900 for(i=0;i<s->nb_streams;i++) {
901 AVStream *st = s->streams[i];
155e9ee9 902 AVIStream *ast = st->priv_data;
52a0bbff 903 av_free(ast);
01f4895c 904 av_free(st->codec->palctrl);
5ae2c73e
MN
905 }
906
7458ccbb
RS
907 if (avi->dv_demux)
908 av_free(avi->dv_demux);
909
c9a65ca8
FB
910 return 0;
911}
912
913static int avi_probe(AVProbeData *p)
914{
915 /* check file header */
916 if (p->buf_size <= 32)
917 return 0;
918 if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
919 p->buf[2] == 'F' && p->buf[3] == 'F' &&
920 p->buf[8] == 'A' && p->buf[9] == 'V' &&
921 p->buf[10] == 'I' && p->buf[11] == ' ')
922 return AVPROBE_SCORE_MAX;
923 else
924 return 0;
925}
926
ff70e601 927AVInputFormat avi_demuxer = {
c9a65ca8
FB
928 "avi",
929 "avi format",
930 sizeof(AVIContext),
931 avi_probe,
932 avi_read_header,
933 avi_read_packet,
934 avi_read_close,
155e9ee9 935 avi_read_seek,
c9a65ca8 936};