10l forgot to set packet_size
[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"
de6d9b64 22
52a0bbff
MN
23#undef NDEBUG
24#include <assert.h>
25
de6d9b64 26//#define DEBUG
155e9ee9
FB
27//#define DEBUG_SEEK
28
155e9ee9 29typedef struct AVIStream {
7c7f3866 30 int64_t frame_offset; /* current frame (video) or byte (audio) counter
155e9ee9 31 (used to compute the pts) */
7c7f3866
MN
32 int remaining;
33 int packet_size;
34
155e9ee9 35 int scale;
115329f1 36 int rate;
8223bca5 37 int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
1fa3d65d 38 int start;
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
MN
89static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
90 ByteIOContext *pb = &s->pb;
91 int longs_pre_entry= get_le16(pb);
92 int index_sub_type = get_byte(pb);
93 int index_type = get_byte(pb);
94 int entries_in_use = get_le32(pb);
95 int chunk_id = get_le32(pb);
96 int64_t base = get_le64(pb);
97 int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
98 AVStream *st;
99 AVIStream *ast;
100 int i;
101
102// av_log(s, AV_LOG_ERROR, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%Ld\n",
103// longs_pre_entry,index_type, entries_in_use, chunk_id, base);
104
105 if(stream_id > s->nb_streams || stream_id < 0)
106 return -1;
107 st= s->streams[stream_id];
108 ast = st->priv_data;
109
110 if(index_sub_type)
111 return -1;
112
113 get_le32(pb);
114
115 if(index_type && longs_pre_entry != 2)
116 return -1;
117 if(index_type>1)
118 return -1;
119
120 for(i=0; i<entries_in_use; i++){
121 if(index_type){
30a43f2d 122 int64_t pos= get_le32(pb) + base - 8;
94d1d6c0 123 int len = get_le32(pb);
30a43f2d 124 int key= len >= 0;
94d1d6c0
MN
125 len &= 0x7FFFFFFF;
126
30a43f2d
MN
127//av_log(s, AV_LOG_ERROR, "pos:%Ld, len:%X\n", pos, len);
128 av_add_index_entry(st, pos, ast->cum_len, len, 0, key ? AVINDEX_KEYFRAME : 0);
129
94d1d6c0
MN
130 if(ast->sample_size)
131 ast->cum_len += len / ast->sample_size;
132 else
133 ast->cum_len ++;
134 }else{
135 int64_t offset= get_le64(pb);
136 int size = get_le32(pb);
137 int duration = get_le32(pb);
138 int64_t pos= url_ftell(pb);
139
140 url_fseek(pb, offset+8, SEEK_SET);
141 read_braindead_odml_indx(s, frame_num);
142 frame_num += duration;
143
144 url_fseek(pb, pos, SEEK_SET);
145 }
146 }
147 return 0;
148}
149
1101abfe 150static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
de6d9b64 151{
c9a65ca8 152 AVIContext *avi = s->priv_data;
de6d9b64 153 ByteIOContext *pb = &s->pb;
deb0a292 154 uint32_t tag, tag1, handler;
b53f1064 155 int codec_type, stream_index, frame_period, bit_rate;
247eadca
FB
156 unsigned int size, nb_frames;
157 int i, n;
de6d9b64 158 AVStream *st;
155e9ee9 159 AVIStream *ast;
9e8cd0db 160 int xan_video = 0; /* hack to support Xan A/V */
de6d9b64 161
7c7f3866 162 avi->stream_index= -1;
115329f1 163
06219cb1 164 if (get_riff(avi, pb) < 0)
de6d9b64 165 return -1;
1101abfe 166
de6d9b64
FB
167 /* first list tag */
168 stream_index = -1;
169 codec_type = -1;
170 frame_period = 0;
171 for(;;) {
172 if (url_feof(pb))
173 goto fail;
174 tag = get_le32(pb);
175 size = get_le32(pb);
176#ifdef DEBUG
177 print_tag("tag", tag, size);
178#endif
179
180 switch(tag) {
181 case MKTAG('L', 'I', 'S', 'T'):
182 /* ignored, except when start of video packets */
183 tag1 = get_le32(pb);
184#ifdef DEBUG
185 print_tag("list", tag1, 0);
186#endif
187 if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
155e9ee9 188 avi->movi_list = url_ftell(pb) - 4;
f8facaaf 189 if(size) avi->movi_end = avi->movi_list + size;
a965c478 190 else avi->movi_end = url_fsize(pb);
de6d9b64
FB
191#ifdef DEBUG
192 printf("movi end=%Lx\n", avi->movi_end);
193#endif
194 goto end_of_header;
195 }
196 break;
8f9298f8 197 case MKTAG('d', 'm', 'l', 'h'):
bb270c08
DB
198 avi->is_odml = 1;
199 url_fskip(pb, size + (size & 1));
200 break;
de6d9b64 201 case MKTAG('a', 'v', 'i', 'h'):
bb270c08 202 /* avi header */
1101abfe 203 /* using frame_period is bad idea */
de6d9b64
FB
204 frame_period = get_le32(pb);
205 bit_rate = get_le32(pb) * 8;
1894edeb
MN
206 get_le32(pb);
207 avi->non_interleaved |= get_le32(pb) & AVIF_MUSTUSEINDEX;
208
209 url_fskip(pb, 2 * 4);
247eadca
FB
210 n = get_le32(pb);
211 for(i=0;i<n;i++) {
155e9ee9 212 AVIStream *ast;
7458ccbb 213 st = av_new_stream(s, i);
de6d9b64
FB
214 if (!st)
215 goto fail;
9ee91c2f 216
155e9ee9
FB
217 ast = av_mallocz(sizeof(AVIStream));
218 if (!ast)
219 goto fail;
220 st->priv_data = ast;
bb270c08 221 }
de6d9b64
FB
222 url_fskip(pb, size - 7 * 4);
223 break;
224 case MKTAG('s', 't', 'r', 'h'):
225 /* stream header */
226 stream_index++;
227 tag1 = get_le32(pb);
7458ccbb 228 handler = get_le32(pb); /* codec tag */
cc11e2b3
MN
229#ifdef DEBUG
230 print_tag("strh", tag1, -1);
231#endif
b53f1064 232 if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
115329f1 233 /*
bb270c08
DB
234 * After some consideration -- I don't think we
235 * have to support anything but DV in a type1 AVIs.
236 */
237 if (s->nb_streams != 1)
238 goto fail;
239
240 if (handler != MKTAG('d', 'v', 's', 'd') &&
241 handler != MKTAG('d', 'v', 'h', 'd') &&
242 handler != MKTAG('d', 'v', 's', 'l'))
243 goto fail;
244
245 ast = s->streams[0]->priv_data;
246 av_freep(&s->streams[0]->codec->extradata);
247 av_freep(&s->streams[0]);
248 s->nb_streams = 0;
249 avi->dv_demux = dv_init_demux(s);
250 if (!avi->dv_demux)
251 goto fail;
252 s->streams[0]->priv_data = ast;
253 url_fskip(pb, 3 * 4);
254 ast->scale = get_le32(pb);
255 ast->rate = get_le32(pb);
256 stream_index = s->nb_streams - 1;
257 url_fskip(pb, size - 7*4);
b53f1064
MN
258 break;
259 }
b559b29b 260
b53f1064
MN
261 if (stream_index >= s->nb_streams) {
262 url_fskip(pb, size - 8);
263 break;
115329f1 264 }
b53f1064
MN
265 st = s->streams[stream_index];
266 ast = st->priv_data;
01f4895c 267 st->codec->stream_codec_tag= handler;
b559b29b 268
b53f1064
MN
269 get_le32(pb); /* flags */
270 get_le16(pb); /* priority */
271 get_le16(pb); /* language */
272 get_le32(pb); /* initial frame */
273 ast->scale = get_le32(pb);
274 ast->rate = get_le32(pb);
275 if(ast->scale && ast->rate){
276 }else if(frame_period){
277 ast->rate = 1000000;
278 ast->scale = frame_period;
279 }else{
280 ast->rate = 25;
281 ast->scale = 1;
282 }
283 av_set_pts_info(st, 64, ast->scale, ast->rate);
115329f1 284
b53f1064
MN
285 ast->start= get_le32(pb); /* start */
286 nb_frames = get_le32(pb);
b559b29b 287
b53f1064 288 st->start_time = 0;
c0df9d75 289 st->duration = nb_frames;
b53f1064
MN
290 get_le32(pb); /* buffer size */
291 get_le32(pb); /* quality */
292 ast->sample_size = get_le32(pb); /* sample ssize */
293// av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
247eadca 294
b53f1064 295 switch(tag1) {
bb270c08 296 case MKTAG('v', 'i', 'd', 's'):
b53f1064 297 codec_type = CODEC_TYPE_VIDEO;
247eadca 298
b53f1064 299 ast->sample_size = 0;
b53f1064
MN
300 break;
301 case MKTAG('a', 'u', 'd', 's'):
302 codec_type = CODEC_TYPE_AUDIO;
9bf9a5fc 303 break;
cc11e2b3 304 case MKTAG('t', 'x', 't', 's'):
115329f1 305 //FIXME
cc11e2b3 306 codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
cc11e2b3 307 break;
30667f42
MN
308 case MKTAG('p', 'a', 'd', 's'):
309 codec_type = CODEC_TYPE_UNKNOWN;
30667f42
MN
310 stream_index--;
311 break;
9bf9a5fc 312 default:
30667f42 313 av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
9bf9a5fc 314 goto fail;
de6d9b64 315 }
b53f1064 316 url_fskip(pb, size - 12 * 4);
de6d9b64
FB
317 break;
318 case MKTAG('s', 't', 'r', 'f'):
319 /* stream header */
7458ccbb 320 if (stream_index >= s->nb_streams || avi->dv_demux) {
de6d9b64
FB
321 url_fskip(pb, size);
322 } else {
323 st = s->streams[stream_index];
324 switch(codec_type) {
325 case CODEC_TYPE_VIDEO:
326 get_le32(pb); /* size */
01f4895c
MN
327 st->codec->width = get_le32(pb);
328 st->codec->height = get_le32(pb);
de6d9b64 329 get_le16(pb); /* panes */
01f4895c 330 st->codec->bits_per_sample= get_le16(pb); /* depth */
de6d9b64 331 tag1 = get_le32(pb);
b559b29b
MN
332 get_le32(pb); /* ImageSize */
333 get_le32(pb); /* XPelsPerMeter */
334 get_le32(pb); /* YPelsPerMeter */
335 get_le32(pb); /* ClrUsed */
336 get_le32(pb); /* ClrImportant */
337
568e18b1 338 if(size > 10*4 && size<(1<<30)){
01f4895c
MN
339 st->codec->extradata_size= size - 10*4;
340 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
341 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
568e18b1 342 }
115329f1 343
01f4895c 344 if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
952c69c4 345 get_byte(pb);
b559b29b 346
5e29abf8
RT
347 /* Extract palette from extradata if bpp <= 8 */
348 /* This code assumes that extradata contains only palette */
349 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
350 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
351 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 352#ifdef WORDS_BIGENDIAN
01f4895c
MN
353 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
354 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 355#else
01f4895c
MN
356 memcpy(st->codec->palctrl->palette, st->codec->extradata,
357 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 358#endif
01f4895c 359 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
360 }
361
de6d9b64
FB
362#ifdef DEBUG
363 print_tag("video", tag1, 0);
364#endif
01f4895c
MN
365 st->codec->codec_type = CODEC_TYPE_VIDEO;
366 st->codec->codec_tag = tag1;
367 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
368 if (st->codec->codec_id == CODEC_ID_XAN_WC4)
9e8cd0db 369 xan_video = 1;
7cbaa7ba 370 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 371// url_fskip(pb, size - 5 * 4);
de6d9b64 372 break;
9bf9a5fc 373 case CODEC_TYPE_AUDIO:
01f4895c 374 get_wav_header(pb, st->codec, size);
1cef9527
FR
375 if (size%2) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
376 url_fskip(pb, 1);
9e8cd0db
MM
377 /* special case time: To support Xan DPCM, hardcode
378 * the format if Xxan is the video codec */
155e9ee9
FB
379 st->need_parsing = 1;
380 /* force parsing as several audio frames can be in
381 one packet */
9e8cd0db 382 if (xan_video)
01f4895c 383 st->codec->codec_id = CODEC_ID_XAN_DPCM;
de6d9b64
FB
384 break;
385 default:
01f4895c
MN
386 st->codec->codec_type = CODEC_TYPE_DATA;
387 st->codec->codec_id= CODEC_ID_NONE;
388 st->codec->codec_tag= 0;
de6d9b64
FB
389 url_fskip(pb, size);
390 break;
391 }
392 }
393 break;
94d1d6c0
MN
394 case MKTAG('i', 'n', 'd', 'x'):
395 i= url_ftell(pb);
396 read_braindead_odml_indx(s, 0);
397 avi->index_loaded=1;
398 url_fseek(pb, i+size, SEEK_SET);
399 break;
de6d9b64
FB
400 default:
401 /* skip tag */
402 size += (size & 1);
403 url_fskip(pb, size);
404 break;
405 }
406 }
407 end_of_header:
408 /* check stream number */
409 if (stream_index != s->nb_streams - 1) {
410 fail:
411 for(i=0;i<s->nb_streams;i++) {
01f4895c 412 av_freep(&s->streams[i]->codec->extradata);
9145f8b3 413 av_freep(&s->streams[i]);
de6d9b64
FB
414 }
415 return -1;
416 }
1101abfe 417
94d1d6c0
MN
418 if(!avi->index_loaded)
419 avi_load_index(s);
42feef6b 420 avi->index_loaded = 1;
30a43f2d 421 avi->non_interleaved |= guess_ni_flag(s);
115329f1 422
de6d9b64
FB
423 return 0;
424}
425
1101abfe 426static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64
FB
427{
428 AVIContext *avi = s->priv_data;
429 ByteIOContext *pb = &s->pb;
8f9298f8 430 int n, d[8], size;
4a8d5135 431 offset_t i, sync;
7458ccbb 432 void* dstr;
115329f1 433
7458ccbb
RS
434 if (avi->dv_demux) {
435 size = dv_get_packet(avi->dv_demux, pkt);
bb270c08
DB
436 if (size >= 0)
437 return size;
2af7e610 438 }
115329f1 439
7c7f3866 440 if(avi->non_interleaved){
79396ac6 441 int best_stream_index = 0;
7c7f3866
MN
442 AVStream *best_st= NULL;
443 AVIStream *best_ast;
444 int64_t best_ts= INT64_MAX;
445 int i;
115329f1 446
7c7f3866
MN
447 for(i=0; i<s->nb_streams; i++){
448 AVStream *st = s->streams[i];
449 AVIStream *ast = st->priv_data;
450 int64_t ts= ast->frame_offset;
451
452 if(ast->sample_size)
453 ts /= ast->sample_size;
454 ts= av_rescale(ts, AV_TIME_BASE * (int64_t)st->time_base.num, st->time_base.den);
455
456// av_log(NULL, AV_LOG_DEBUG, "%Ld %d/%d %Ld\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
457 if(ts < best_ts){
458 best_ts= ts;
459 best_st= st;
460 best_stream_index= i;
461 }
462 }
463 best_ast = best_st->priv_data;
464 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
465 if(best_ast->remaining)
466 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
467 else
468 i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
469
470// av_log(NULL, AV_LOG_DEBUG, "%d\n", i);
471 if(i>=0){
472 int64_t pos= best_st->index_entries[i].pos;
5c89153e 473 pos += best_ast->packet_size - best_ast->remaining;
1894edeb 474 url_fseek(&s->pb, pos + 8, SEEK_SET);
7c7f3866 475// av_log(NULL, AV_LOG_DEBUG, "pos=%Ld\n", pos);
115329f1 476
8223bca5
MN
477 assert(best_ast->remaining <= best_ast->packet_size);
478
1894edeb
MN
479 avi->stream_index= best_stream_index;
480 if(!best_ast->remaining)
8223bca5 481 best_ast->packet_size=
1894edeb 482 best_ast->remaining= best_st->index_entries[i].size;
7c7f3866
MN
483 }
484 }
115329f1 485
4a8d5135 486resync:
7c7f3866
MN
487 if(avi->stream_index >= 0){
488 AVStream *st= s->streams[ avi->stream_index ];
489 AVIStream *ast= st->priv_data;
490 int size;
115329f1 491
7c7f3866
MN
492 if(ast->sample_size == 0)
493 size= INT_MAX;
115329f1 494 else if(ast->sample_size < 32)
7c7f3866
MN
495 size= 64*ast->sample_size;
496 else
497 size= ast->sample_size;
498
499 if(size > ast->remaining)
500 size= ast->remaining;
2692067a 501 av_get_packet(pb, pkt, size);
115329f1 502
7c7f3866
MN
503 if (avi->dv_demux) {
504 dstr = pkt->destruct;
505 size = dv_produce_packet(avi->dv_demux, pkt,
506 pkt->data, pkt->size);
507 pkt->destruct = dstr;
508 pkt->flags |= PKT_FLAG_KEY;
509 } else {
510 /* XXX: how to handle B frames in avi ? */
511 pkt->dts = ast->frame_offset;
512// pkt->dts += ast->start;
513 if(ast->sample_size)
514 pkt->dts /= ast->sample_size;
8223bca5 515//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
516 pkt->stream_index = avi->stream_index;
517
01f4895c 518 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
7c7f3866
MN
519 if(st->index_entries){
520 AVIndexEntry *e;
521 int index;
522
523 index= av_index_search_timestamp(st, pkt->dts, 0);
524 e= &st->index_entries[index];
115329f1 525
d46db490 526 if(index >= 0 && e->timestamp == ast->frame_offset){
7c7f3866
MN
527 if (e->flags & AVINDEX_KEYFRAME)
528 pkt->flags |= PKT_FLAG_KEY;
529 }
530 } else {
531 /* if no index, better to say that all frames
532 are key frames */
533 pkt->flags |= PKT_FLAG_KEY;
534 }
535 } else {
115329f1 536 pkt->flags |= PKT_FLAG_KEY;
7c7f3866
MN
537 }
538 if(ast->sample_size)
539 ast->frame_offset += pkt->size;
540 else
541 ast->frame_offset++;
542 }
543 ast->remaining -= size;
544 if(!ast->remaining){
545 avi->stream_index= -1;
546 ast->packet_size= 0;
547 if (size & 1) {
548 get_byte(pb);
549 size++;
550 }
551 }
552
553 return size;
554 }
555
4a8d5135
MN
556 memset(d, -1, sizeof(int)*8);
557 for(i=sync=url_ftell(pb); !url_feof(pb); i++) {
df99755b 558 int j;
1101abfe 559
bb270c08
DB
560 if (i >= avi->movi_end) {
561 if (avi->is_odml) {
562 url_fskip(pb, avi->riff_end - i);
563 avi->riff_end = avi->movi_end = url_fsize(pb);
564 } else
565 break;
566 }
06219cb1 567
df99755b
MN
568 for(j=0; j<7; j++)
569 d[j]= d[j+1];
570 d[7]= get_byte(pb);
115329f1 571
df99755b 572 size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
115329f1 573
df99755b 574 if( d[2] >= '0' && d[2] <= '9'
d2c5f0a4
MN
575 && d[3] >= '0' && d[3] <= '9'){
576 n= (d[2] - '0') * 10 + (d[3] - '0');
577 }else{
578 n= 100; //invalid stream id
df99755b 579 }
d2c5f0a4
MN
580//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);
581 if(i + size > avi->movi_end || d[0]<0)
582 continue;
115329f1 583
d2c5f0a4
MN
584 //parse ix##
585 if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams)
bb270c08 586 //parse JUNK
d2c5f0a4 587 ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')){
8f9298f8 588 url_fskip(pb, size);
d2c5f0a4 589//av_log(NULL, AV_LOG_DEBUG, "SKIP\n");
4a8d5135 590 goto resync;
8f9298f8 591 }
d2c5f0a4 592
df99755b 593 if( d[0] >= '0' && d[0] <= '9'
d2c5f0a4
MN
594 && d[1] >= '0' && d[1] <= '9'){
595 n= (d[0] - '0') * 10 + (d[1] - '0');
596 }else{
597 n= 100; //invalid stream id
598 }
115329f1 599
d2c5f0a4 600 //parse ##dc/##wb
80e3a08c 601 if(n < s->nb_streams){
d2c5f0a4
MN
602 AVStream *st;
603 AVIStream *ast;
604 st = s->streams[n];
605 ast = st->priv_data;
115329f1 606
f3356e9c
MN
607 if( (st->discard >= AVDISCARD_DEFAULT && size==0)
608 /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & PKT_FLAG_KEY))*/ //FIXME needs a little reordering
609 || st->discard >= AVDISCARD_ALL){
610 if(ast->sample_size) ast->frame_offset += pkt->size;
611 else ast->frame_offset++;
b4aea108
MN
612 url_fskip(pb, size);
613 goto resync;
614 }
d2c5f0a4 615
115329f1 616 if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
d2c5f0a4 617 d[2]*256+d[3] == ast->prefix /*||
115329f1 618 (d[2] == 'd' && d[3] == 'c') ||
bb270c08 619 (d[2] == 'w' && d[3] == 'b')*/) {
d2c5f0a4
MN
620
621//av_log(NULL, AV_LOG_DEBUG, "OK\n");
622 if(d[2]*256+d[3] == ast->prefix)
623 ast->prefix_count++;
624 else{
625 ast->prefix= d[2]*256+d[3];
626 ast->prefix_count= 0;
627 }
628
7c7f3866
MN
629 avi->stream_index= n;
630 ast->packet_size= size + 8;
631 ast->remaining= size;
632 goto resync;
d2c5f0a4 633 }
df99755b 634 }
69bde0b2
MM
635 /* palette changed chunk */
636 if ( d[0] >= '0' && d[0] <= '9'
637 && d[1] >= '0' && d[1] <= '9'
638 && ((d[2] == 'p' && d[3] == 'c'))
639 && n < s->nb_streams && i + size <= avi->movi_end) {
640
641 AVStream *st;
642 int first, clr, flags, k, p;
643
644 st = s->streams[n];
645
646 first = get_byte(pb);
647 clr = get_byte(pb);
bb270c08
DB
648 if(!clr) /* all 256 colors used */
649 clr = 256;
69bde0b2
MM
650 flags = get_le16(pb);
651 p = 4;
652 for (k = first; k < clr + first; k++) {
653 int r, g, b;
654 r = get_byte(pb);
655 g = get_byte(pb);
656 b = get_byte(pb);
657 get_byte(pb);
01f4895c 658 st->codec->palctrl->palette[k] = b + (g << 8) + (r << 16);
69bde0b2 659 }
01f4895c 660 st->codec->palctrl->palette_changed = 1;
4a8d5135 661 goto resync;
69bde0b2
MM
662 }
663
df99755b 664 }
d2c5f0a4 665
df99755b 666 return -1;
de6d9b64
FB
667}
668
155e9ee9
FB
669/* XXX: we make the implicit supposition that the position are sorted
670 for each stream */
671static int avi_read_idx1(AVFormatContext *s, int size)
672{
7c7f3866 673 AVIContext *avi = s->priv_data;
155e9ee9
FB
674 ByteIOContext *pb = &s->pb;
675 int nb_index_entries, i;
676 AVStream *st;
677 AVIStream *ast;
155e9ee9 678 unsigned int index, tag, flags, pos, len;
7c7f3866 679 unsigned last_pos= -1;
115329f1 680
155e9ee9
FB
681 nb_index_entries = size / 16;
682 if (nb_index_entries <= 0)
683 return -1;
684
685 /* read the entries and sort them in each stream component */
686 for(i = 0; i < nb_index_entries; i++) {
687 tag = get_le32(pb);
688 flags = get_le32(pb);
689 pos = get_le32(pb);
690 len = get_le32(pb);
52a0bbff 691#if defined(DEBUG_SEEK)
115329f1 692 av_log(NULL, AV_LOG_DEBUG, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
155e9ee9
FB
693 i, tag, flags, pos, len);
694#endif
7c7f3866
MN
695 if(i==0 && pos > avi->movi_list)
696 avi->movi_list= 0; //FIXME better check
5c89153e 697 pos += avi->movi_list;
7c7f3866 698
155e9ee9
FB
699 index = ((tag & 0xff) - '0') * 10;
700 index += ((tag >> 8) & 0xff) - '0';
701 if (index >= s->nb_streams)
702 continue;
703 st = s->streams[index];
704 ast = st->priv_data;
115329f1 705
52a0bbff
MN
706#if defined(DEBUG_SEEK)
707 av_log(NULL, AV_LOG_DEBUG, "%d cum_len=%d\n", len, ast->cum_len);
708#endif
80e3a08c
MN
709 if(last_pos == pos)
710 avi->non_interleaved= 1;
711 else
30a43f2d 712 av_add_index_entry(st, pos, ast->cum_len, len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
7c7f3866
MN
713 if(ast->sample_size)
714 ast->cum_len += len / ast->sample_size;
715 else
716 ast->cum_len ++;
7c7f3866 717 last_pos= pos;
155e9ee9
FB
718 }
719 return 0;
720}
721
7c7f3866 722static int guess_ni_flag(AVFormatContext *s){
7c7f3866
MN
723 int i;
724 int64_t last_start=0;
725 int64_t first_end= INT64_MAX;
115329f1 726
7c7f3866
MN
727 for(i=0; i<s->nb_streams; i++){
728 AVStream *st = s->streams[i];
7c7f3866
MN
729 int n= st->nb_index_entries;
730
731 if(n <= 0)
732 continue;
733
734 if(st->index_entries[0].pos > last_start)
735 last_start= st->index_entries[0].pos;
736 if(st->index_entries[n-1].pos < first_end)
737 first_end= st->index_entries[n-1].pos;
738 }
739 return last_start > first_end;
740}
741
155e9ee9
FB
742static int avi_load_index(AVFormatContext *s)
743{
744 AVIContext *avi = s->priv_data;
745 ByteIOContext *pb = &s->pb;
746 uint32_t tag, size;
e6c0297f 747 offset_t pos= url_ftell(pb);
115329f1 748
155e9ee9
FB
749 url_fseek(pb, avi->movi_end, SEEK_SET);
750#ifdef DEBUG_SEEK
751 printf("movi_end=0x%llx\n", avi->movi_end);
752#endif
753 for(;;) {
754 if (url_feof(pb))
755 break;
756 tag = get_le32(pb);
757 size = get_le32(pb);
758#ifdef DEBUG_SEEK
759 printf("tag=%c%c%c%c size=0x%x\n",
760 tag & 0xff,
761 (tag >> 8) & 0xff,
762 (tag >> 16) & 0xff,
763 (tag >> 24) & 0xff,
764 size);
765#endif
766 switch(tag) {
767 case MKTAG('i', 'd', 'x', '1'):
768 if (avi_read_idx1(s, size) < 0)
769 goto skip;
770 else
771 goto the_end;
772 break;
773 default:
774 skip:
775 size += (size & 1);
776 url_fskip(pb, size);
777 break;
778 }
779 }
780 the_end:
e6c0297f 781 url_fseek(pb, pos, SEEK_SET);
155e9ee9
FB
782 return 0;
783}
784
7b3c1382 785static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
155e9ee9
FB
786{
787 AVIContext *avi = s->priv_data;
788 AVStream *st;
52a0bbff 789 int i, index;
155e9ee9
FB
790 int64_t pos;
791
792 if (!avi->index_loaded) {
793 /* we only load the index on demand */
794 avi_load_index(s);
795 avi->index_loaded = 1;
796 }
52a0bbff 797 assert(stream_index>= 0);
155e9ee9
FB
798
799 st = s->streams[stream_index];
52a0bbff
MN
800 index= av_index_search_timestamp(st, timestamp, flags);
801 if(index<0)
155e9ee9 802 return -1;
115329f1 803
155e9ee9 804 /* find the position */
52a0bbff
MN
805 pos = st->index_entries[index].pos;
806 timestamp = st->index_entries[index].timestamp;
807
808// av_log(NULL, AV_LOG_DEBUG, "XX %Ld %d %Ld\n", timestamp, index, st->index_entries[index].timestamp);
155e9ee9 809
155e9ee9 810 for(i = 0; i < s->nb_streams; i++) {
52a0bbff
MN
811 AVStream *st2 = s->streams[i];
812 AVIStream *ast2 = st2->priv_data;
7c7f3866
MN
813
814 ast2->packet_size=
815 ast2->remaining= 0;
816
52a0bbff
MN
817 if (st2->nb_index_entries <= 0)
818 continue;
115329f1 819
52a0bbff
MN
820// assert(st2->codec.block_align);
821 assert(st2->time_base.den == ast2->rate);
822 assert(st2->time_base.num == ast2->scale);
823 index = av_index_search_timestamp(
115329f1 824 st2,
52a0bbff
MN
825 av_rescale(timestamp, st2->time_base.den*(int64_t)st->time_base.num, st->time_base.den * (int64_t)st2->time_base.num),
826 flags | AVSEEK_FLAG_BACKWARD);
827 if(index<0)
828 index=0;
115329f1 829
7c7f3866
MN
830 if(!avi->non_interleaved){
831 while(index>0 && st2->index_entries[index].pos > pos)
832 index--;
833 while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
834 index++;
835 }
836
52a0bbff
MN
837// av_log(NULL, AV_LOG_DEBUG, "%Ld %d %Ld\n", timestamp, index, st2->index_entries[index].timestamp);
838 /* extract the current frame number */
839 ast2->frame_offset = st2->index_entries[index].timestamp;
840 if(ast2->sample_size)
841 ast2->frame_offset *=ast2->sample_size;
155e9ee9 842 }
52a0bbff 843
664f5836
RS
844 if (avi->dv_demux)
845 dv_flush_audio_packets(avi->dv_demux);
155e9ee9 846 /* do the seek */
155e9ee9 847 url_fseek(&s->pb, pos, SEEK_SET);
7c7f3866 848 avi->stream_index= -1;
155e9ee9
FB
849 return 0;
850}
851
1101abfe 852static int avi_read_close(AVFormatContext *s)
de6d9b64 853{
5ae2c73e
MN
854 int i;
855 AVIContext *avi = s->priv_data;
5ae2c73e
MN
856
857 for(i=0;i<s->nb_streams;i++) {
858 AVStream *st = s->streams[i];
155e9ee9 859 AVIStream *ast = st->priv_data;
52a0bbff 860 av_free(ast);
01f4895c
MN
861 av_free(st->codec->extradata);
862 av_free(st->codec->palctrl);
5ae2c73e
MN
863 }
864
7458ccbb
RS
865 if (avi->dv_demux)
866 av_free(avi->dv_demux);
867
c9a65ca8
FB
868 return 0;
869}
870
871static int avi_probe(AVProbeData *p)
872{
873 /* check file header */
874 if (p->buf_size <= 32)
875 return 0;
876 if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
877 p->buf[2] == 'F' && p->buf[3] == 'F' &&
878 p->buf[8] == 'A' && p->buf[9] == 'V' &&
879 p->buf[10] == 'I' && p->buf[11] == ' ')
880 return AVPROBE_SCORE_MAX;
881 else
882 return 0;
883}
884
885static AVInputFormat avi_iformat = {
886 "avi",
887 "avi format",
888 sizeof(AVIContext),
889 avi_probe,
890 avi_read_header,
891 avi_read_packet,
892 avi_read_close,
155e9ee9 893 avi_read_seek,
c9a65ca8
FB
894};
895
896int avidec_init(void)
897{
898 av_register_input_format(&avi_iformat);
de6d9b64
FB
899 return 0;
900}