60e0f5989becd5f9764349ddf8cf21ce7da44d16
[libav.git] / libavcodec / h263dec.c
1 /*
2 * H263 decoder
3 * Copyright (c) 2001 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 #include "avcodec.h"
20 #include "dsputil.h"
21 #include "mpegvideo.h"
22
23 #if 1
24 #define PRINT_QP(a, b) {}
25 #else
26 #define PRINT_QP(a, b) printf(a, b)
27 #endif
28
29 //#define DEBUG
30 //#define PRINT_FRAME_TIME
31 #ifdef PRINT_FRAME_TIME
32 static inline long long rdtsc()
33 {
34 long long l;
35 asm volatile( "rdtsc\n\t"
36 : "=A" (l)
37 );
38 // printf("%d\n", int(l/1000));
39 return l;
40 }
41 #endif
42
43 static int h263_decode_init(AVCodecContext *avctx)
44 {
45 MpegEncContext *s = avctx->priv_data;
46
47 s->avctx = avctx;
48 s->out_format = FMT_H263;
49
50 s->width = avctx->width;
51 s->height = avctx->height;
52 s->workaround_bugs= avctx->workaround_bugs;
53
54 // set defaults
55 s->quant_precision=5;
56 s->progressive_sequence=1;
57 s->decode_mb= ff_h263_decode_mb;
58 s->low_delay= 1;
59
60 /* select sub codec */
61 switch(avctx->codec->id) {
62 case CODEC_ID_H263:
63 s->gob_number = 0;
64 break;
65 case CODEC_ID_MPEG4:
66 s->time_increment_bits = 4; /* default value for broken headers */
67 s->h263_pred = 1;
68 s->low_delay = 0; //default, might be overriden in the vol header during header parsing
69 break;
70 case CODEC_ID_MSMPEG4V1:
71 s->h263_msmpeg4 = 1;
72 s->h263_pred = 1;
73 s->msmpeg4_version=1;
74 break;
75 case CODEC_ID_MSMPEG4V2:
76 s->h263_msmpeg4 = 1;
77 s->h263_pred = 1;
78 s->msmpeg4_version=2;
79 break;
80 case CODEC_ID_MSMPEG4V3:
81 s->h263_msmpeg4 = 1;
82 s->h263_pred = 1;
83 s->msmpeg4_version=3;
84 break;
85 case CODEC_ID_WMV1:
86 s->h263_msmpeg4 = 1;
87 s->h263_pred = 1;
88 s->msmpeg4_version=4;
89 break;
90 case CODEC_ID_WMV2:
91 s->h263_msmpeg4 = 1;
92 s->h263_pred = 1;
93 s->msmpeg4_version=5;
94 break;
95 case CODEC_ID_H263I:
96 s->h263_intel = 1;
97 break;
98 default:
99 return -1;
100 }
101 s->codec_id= avctx->codec->id;
102
103 /* for h263, we allocate the images after having read the header */
104 if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
105 if (MPV_common_init(s) < 0)
106 return -1;
107
108 if (s->h263_msmpeg4)
109 ff_msmpeg4_decode_init(s);
110 else
111 h263_decode_init_vlc(s);
112
113 return 0;
114 }
115
116 static int h263_decode_end(AVCodecContext *avctx)
117 {
118 MpegEncContext *s = avctx->priv_data;
119
120 MPV_common_end(s);
121 return 0;
122 }
123
124 /**
125 * retunrs the number of bytes consumed for building the current frame
126 */
127 static int get_consumed_bytes(MpegEncContext *s, int buf_size){
128 int pos= (get_bits_count(&s->gb)+7)>>3;
129
130 if(s->divx_version>=500){
131 //we would have to scan through the whole buf to handle the weird reordering ...
132 return buf_size;
133 }else if(s->flags&CODEC_FLAG_TRUNCATED){
134 pos -= s->parse_context.last_index;
135 if(pos<0) pos=0; // padding is not really read so this might be -1
136 return pos;
137 }else{
138 if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...)
139 if(pos+10>buf_size) pos=buf_size; // oops ;)
140
141 return pos;
142 }
143 }
144
145 static int decode_slice(MpegEncContext *s){
146 s->last_resync_gb= s->gb;
147 s->first_slice_line= 1;
148
149 s->resync_mb_x= s->mb_x;
150 s->resync_mb_y= s->mb_y;
151
152 s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
153 s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
154
155 if(s->partitioned_frame){
156 const int qscale= s->qscale;
157
158 if(s->codec_id==CODEC_ID_MPEG4){
159 if(ff_mpeg4_decode_partitions(s) < 0)
160 return -1;
161 }
162
163 /* restore variables which where modified */
164 s->first_slice_line=1;
165 s->mb_x= s->resync_mb_x;
166 s->mb_y= s->resync_mb_y;
167 s->qscale= qscale;
168 s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
169 s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
170 }
171
172 for(; s->mb_y < s->mb_height; s->mb_y++) {
173 /* per-row end of slice checks */
174 if(s->msmpeg4_version){
175 if(s->resync_mb_y + s->slice_height == s->mb_y){
176 const int xy= s->mb_x + s->mb_y*s->mb_width;
177 s->error_status_table[xy-1]|= AC_END|DC_END|MV_END;
178 return 0;
179 }
180 }
181
182 if(s->msmpeg4_version==1){
183 s->last_dc[0]=
184 s->last_dc[1]=
185 s->last_dc[2]= 128;
186 }
187
188 ff_init_block_index(s);
189 for(; s->mb_x < s->mb_width; s->mb_x++) {
190 int ret;
191
192 ff_update_block_index(s);
193
194 if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
195 s->first_slice_line=0;
196 }
197
198 /* DCT & quantize */
199 s->dsp.clear_blocks(s->block[0]);
200
201 s->mv_dir = MV_DIR_FORWARD;
202 s->mv_type = MV_TYPE_16X16;
203 // s->mb_skiped = 0;
204 //printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
205 ret= s->decode_mb(s, s->block);
206
207 PRINT_QP("%2d", s->qscale);
208 MPV_decode_mb(s, s->block);
209
210 if(ret<0){
211 const int xy= s->mb_x + s->mb_y*s->mb_width;
212 if(ret==SLICE_END){
213 //printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
214 s->error_status_table[xy]|= AC_END;
215 if(!s->partitioned_frame)
216 s->error_status_table[xy]|= MV_END|DC_END;
217
218 s->padding_bug_score--;
219
220 if(++s->mb_x >= s->mb_width){
221 s->mb_x=0;
222 ff_draw_horiz_band(s);
223 s->mb_y++;
224 }
225 return 0;
226 }else if(ret==SLICE_NOEND){
227 fprintf(stderr,"Slice mismatch at MB: %d\n", xy);
228 return -1;
229 }
230 fprintf(stderr,"Error at MB: %d\n", xy);
231 s->error_status_table[xy]|= AC_ERROR;
232 if(!s->partitioned_frame)
233 s->error_status_table[xy]|= DC_ERROR|MV_ERROR;
234
235 return -1;
236 }
237 }
238
239 ff_draw_horiz_band(s);
240
241 PRINT_QP("%s", "\n");
242
243 s->mb_x= 0;
244 }
245
246 assert(s->mb_x==0 && s->mb_y==s->mb_height);
247
248 /* try to detect the padding bug */
249 if( s->codec_id==CODEC_ID_MPEG4
250 && (s->workaround_bugs&FF_BUG_AUTODETECT)
251 && s->gb.size*8 - get_bits_count(&s->gb) >=0
252 && s->gb.size*8 - get_bits_count(&s->gb) < 48
253 && !s->resync_marker
254 && !s->data_partitioning){
255
256 const int bits_count= get_bits_count(&s->gb);
257 const int bits_left = s->gb.size*8 - bits_count;
258
259 if(bits_left==0 || bits_left>8){
260 s->padding_bug_score++;
261 } else if(bits_left != 1){
262 int v= show_bits(&s->gb, 8);
263 v|= 0x7F >> (7-(bits_count&7));
264
265 if(v==0x7F)
266 s->padding_bug_score--;
267 else
268 s->padding_bug_score++;
269 }
270
271 if(s->padding_bug_score > -2)
272 s->workaround_bugs |= FF_BUG_NO_PADDING;
273 else
274 s->workaround_bugs &= ~FF_BUG_NO_PADDING;
275 }
276
277 // handle formats which dont have unique end markers
278 if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
279 int left= s->gb.size*8 - get_bits_count(&s->gb);
280 int max_extra=7;
281
282 /* no markers in M$ crap */
283 if(s->msmpeg4_version && s->pict_type==I_TYPE)
284 max_extra+= 17;
285
286 /* buggy padding but the frame should still end approximately at the bitstream end */
287 if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
288 max_extra+= 48;
289 else if((s->workaround_bugs&FF_BUG_NO_PADDING))
290 max_extra+= 256*256*256*64;
291
292 if(left>max_extra){
293 fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
294 }
295 else if(left<0){
296 fprintf(stderr, "overreading %d bits\n", -left);
297 }else
298 s->error_status_table[s->mb_num-1]|= AC_END|MV_END|DC_END;
299
300 return 0;
301 }
302
303 fprintf(stderr, "slice end not reached but screenspace end (%d left %06X)\n",
304 s->gb.size*8 - get_bits_count(&s->gb),
305 show_bits(&s->gb, 24));
306 return -1;
307 }
308
309 /**
310 * finds the end of the current frame in the bitstream.
311 * @return the position of the first byte of the next frame, or -1
312 */
313 static int mpeg4_find_frame_end(MpegEncContext *s, UINT8 *buf, int buf_size){
314 ParseContext *pc= &s->parse_context;
315 int vop_found, i;
316 uint32_t state;
317
318 vop_found= pc->frame_start_found;
319 state= pc->state;
320
321 i=0;
322 if(!vop_found){
323 for(i=0; i<buf_size; i++){
324 state= (state<<8) | buf[i];
325 if(state == 0x1B6){
326 i++;
327 vop_found=1;
328 break;
329 }
330 }
331 }
332
333 for(; i<buf_size; i++){
334 state= (state<<8) | buf[i];
335 if((state&0xFFFFFF00) == 0x100){
336 pc->frame_start_found=0;
337 pc->state=-1;
338 return i-3;
339 }
340 }
341 pc->frame_start_found= vop_found;
342 pc->state= state;
343 return -1;
344 }
345
346 static int h263_decode_frame(AVCodecContext *avctx,
347 void *data, int *data_size,
348 UINT8 *buf, int buf_size)
349 {
350 MpegEncContext *s = avctx->priv_data;
351 int ret,i;
352 AVFrame *pict = data;
353 float new_aspect;
354
355 #ifdef PRINT_FRAME_TIME
356 uint64_t time= rdtsc();
357 #endif
358 #ifdef DEBUG
359 printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);
360 printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
361 #endif
362 s->flags= avctx->flags;
363
364 *data_size = 0;
365
366 /* no supplementary picture */
367 if (buf_size == 0) {
368 return 0;
369 }
370
371 if(s->flags&CODEC_FLAG_TRUNCATED){
372 int next;
373 ParseContext *pc= &s->parse_context;
374
375 pc->last_index= pc->index;
376
377 if(s->codec_id==CODEC_ID_MPEG4){
378 next= mpeg4_find_frame_end(s, buf, buf_size);
379 }else{
380 fprintf(stderr, "this codec doesnt support truncated bitstreams\n");
381 return -1;
382 }
383 if(next==-1){
384 if(buf_size + FF_INPUT_BUFFER_PADDING_SIZE + pc->index > pc->buffer_size){
385 pc->buffer_size= buf_size + pc->index + 10*1024;
386 pc->buffer= realloc(pc->buffer, pc->buffer_size);
387 }
388
389 memcpy(&pc->buffer[pc->index], buf, buf_size);
390 pc->index += buf_size;
391 return buf_size;
392 }
393
394 if(pc->index){
395 if(next + FF_INPUT_BUFFER_PADDING_SIZE + pc->index > pc->buffer_size){
396 pc->buffer_size= next + pc->index + 10*1024;
397 pc->buffer= realloc(pc->buffer, pc->buffer_size);
398 }
399
400 memcpy(&pc->buffer[pc->index], buf, next + FF_INPUT_BUFFER_PADDING_SIZE );
401 pc->index = 0;
402 buf= pc->buffer;
403 buf_size= pc->last_index + next;
404 }
405 }
406
407 retry:
408
409 if(s->bitstream_buffer_size && buf_size<20){ //divx 5.01+ frame reorder
410 init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size);
411 }else
412 init_get_bits(&s->gb, buf, buf_size);
413 s->bitstream_buffer_size=0;
414
415 if (!s->context_initialized) {
416 if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
417 return -1;
418 }
419
420 /* let's go :-) */
421 if (s->h263_msmpeg4) {
422 ret = msmpeg4_decode_picture_header(s);
423 } else if (s->h263_pred) {
424 if(s->avctx->extradata_size && s->picture_number==0){
425 GetBitContext gb;
426
427 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size);
428 ret = ff_mpeg4_decode_picture_header(s, &gb);
429 }
430 ret = ff_mpeg4_decode_picture_header(s, &s->gb);
431
432 if(s->flags& CODEC_FLAG_LOW_DELAY)
433 s->low_delay=1;
434 } else if (s->h263_intel) {
435 ret = intel_h263_decode_picture_header(s);
436 } else {
437 ret = h263_decode_picture_header(s);
438 }
439 avctx->has_b_frames= !s->low_delay;
440
441 if(s->workaround_bugs&FF_BUG_AUTODETECT){
442 if(s->avctx->fourcc == ff_get_fourcc("XVIX"))
443 s->workaround_bugs|= FF_BUG_XVID_ILACE;
444 #if 0
445 if(s->avctx->fourcc == ff_get_fourcc("MP4S"))
446 s->workaround_bugs|= FF_BUG_AC_VLC;
447
448 if(s->avctx->fourcc == ff_get_fourcc("M4S2"))
449 s->workaround_bugs|= FF_BUG_AC_VLC;
450 #endif
451 if(s->avctx->fourcc == ff_get_fourcc("UMP4")){
452 s->workaround_bugs|= FF_BUG_UMP4;
453 s->workaround_bugs|= FF_BUG_AC_VLC;
454 }
455
456 if(s->divx_version){
457 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
458 }
459
460 if(s->avctx->fourcc == ff_get_fourcc("XVID") && s->xvid_build==0)
461 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
462
463 if(s->avctx->fourcc == ff_get_fourcc("XVID") && s->xvid_build==0)
464 s->padding_bug_score= 256*256*256*64;
465
466 if(s->xvid_build && s->xvid_build<=1)
467 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
468
469 //printf("padding_bug_score: %d\n", s->padding_bug_score);
470 #if 0
471 if(s->divx_version==500)
472 s->workaround_bugs|= FF_BUG_NO_PADDING;
473
474 /* very ugly XVID padding bug detection FIXME/XXX solve this differently
475 * lets hope this at least works
476 */
477 if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
478 && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
479 s->workaround_bugs|= FF_BUG_NO_PADDING;
480
481 if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok
482 s->workaround_bugs|= FF_BUG_NO_PADDING;
483 #endif
484 }
485
486
487 #if 0 // dump bits per frame / qp / complexity
488 {
489 static FILE *f=NULL;
490 if(!f) f=fopen("rate_qp_cplx.txt", "w");
491 fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
492 }
493 #endif
494
495 /* After H263 & mpeg4 header decode we have the height, width,*/
496 /* and other parameters. So then we could init the picture */
497 /* FIXME: By the way H263 decoder is evolving it should have */
498 /* an H263EncContext */
499 if(s->aspected_height)
500 new_aspect= s->aspected_width*s->width / (float)(s->height*s->aspected_height);
501 else
502 new_aspect=0;
503
504 if ( s->width != avctx->width || s->height != avctx->height
505 || ABS(new_aspect - avctx->aspect_ratio) > 0.001) {
506 /* H.263 could change picture size any time */
507 MPV_common_end(s);
508 s->context_initialized=0;
509 }
510 if (!s->context_initialized) {
511 avctx->width = s->width;
512 avctx->height = s->height;
513 avctx->aspect_ratio= new_aspect;
514
515 goto retry;
516 }
517
518 if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
519 s->gob_index = ff_h263_get_gob_height(s);
520
521 if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
522 /* skip if the header was thrashed */
523 if (ret < 0){
524 fprintf(stderr, "header damaged\n");
525 return -1;
526 }
527
528 // for hurry_up==5
529 s->current_picture.pict_type= s->pict_type;
530 s->current_picture.key_frame= s->pict_type == I_TYPE;
531
532 /* skip b frames if we dont have reference frames */
533 if(s->last_picture.data[0]==NULL && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
534 /* skip b frames if we are in a hurry */
535 if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
536 /* skip everything if we are in a hurry>=5 */
537 if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
538
539 if(s->next_p_frame_damaged){
540 if(s->pict_type==B_TYPE)
541 return get_consumed_bytes(s, buf_size);
542 else
543 s->next_p_frame_damaged=0;
544 }
545
546 if(MPV_frame_start(s, avctx) < 0)
547 return -1;
548
549 #ifdef DEBUG
550 printf("qscale=%d\n", s->qscale);
551 #endif
552
553 if(s->error_resilience)
554 memset(s->error_status_table, MV_ERROR|AC_ERROR|DC_ERROR|VP_START|AC_END|DC_END|MV_END, s->mb_num*sizeof(UINT8));
555
556 /* decode each macroblock */
557 s->block_wrap[0]=
558 s->block_wrap[1]=
559 s->block_wrap[2]=
560 s->block_wrap[3]= s->mb_width*2 + 2;
561 s->block_wrap[4]=
562 s->block_wrap[5]= s->mb_width + 2;
563 s->mb_x=0;
564 s->mb_y=0;
565
566 decode_slice(s);
567 s->error_status_table[0]|= VP_START;
568 while(s->mb_y<s->mb_height && s->gb.size*8 - get_bits_count(&s->gb)>16){
569 if(s->msmpeg4_version){
570 if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0)
571 break;
572 }else{
573 if(ff_h263_resync(s)<0)
574 break;
575 }
576
577 if(s->msmpeg4_version!=4 && s->h263_pred)
578 ff_mpeg4_clean_buffers(s);
579
580 decode_slice(s);
581
582 s->error_status_table[s->resync_mb_x + s->resync_mb_y*s->mb_width]|= VP_START;
583 }
584
585 if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
586 if(msmpeg4_decode_ext_header(s, buf_size) < 0){
587 s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
588 }
589
590 /* divx 5.01+ bistream reorder stuff */
591 if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_version>=500){
592 int current_pos= get_bits_count(&s->gb)>>3;
593
594 if( buf_size - current_pos > 5
595 && buf_size - current_pos < BITSTREAM_BUFFER_SIZE){
596 int i;
597 int startcode_found=0;
598 for(i=current_pos; i<buf_size-3; i++){
599 if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
600 startcode_found=1;
601 break;
602 }
603 }
604 if(startcode_found){
605 memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
606 s->bitstream_buffer_size= buf_size - current_pos;
607 }
608 }
609 }
610
611 if(s->error_resilience){
612 int error=0, num_end_markers=0;
613 for(i=0; i<s->mb_num; i++){
614 int status= s->error_status_table[i];
615 #if 0
616 if(i%s->mb_width == 0) printf("\n");
617 printf("%2X ", status);
618 #endif
619 if(status==0) continue;
620
621 if(status&(DC_ERROR|AC_ERROR|MV_ERROR))
622 error=1;
623 if(status&VP_START){
624 if(num_end_markers)
625 error=1;
626 num_end_markers=3;
627 }
628 if(status&AC_END)
629 num_end_markers--;
630 if(status&DC_END)
631 num_end_markers--;
632 if(status&MV_END)
633 num_end_markers--;
634 }
635 if(num_end_markers || error){
636 fprintf(stderr, "concealing errors\n");
637 //printf("type:%d\n", s->pict_type);
638 ff_error_resilience(s);
639 }
640 }
641
642 MPV_frame_end(s);
643 #if 0 //dirty show MVs, we should export the MV tables and write a filter to show them
644 {
645 int mb_y;
646 s->has_b_frames=1;
647 for(mb_y=0; mb_y<s->mb_height; mb_y++){
648 int mb_x;
649 int y= mb_y*16 + 8;
650 for(mb_x=0; mb_x<s->mb_width; mb_x++){
651 int x= mb_x*16 + 8;
652 uint8_t *ptr= s->last_picture.data[0];
653 int xy= 1 + mb_x*2 + (mb_y*2 + 1)*(s->mb_width*2 + 2);
654 int mx= (s->motion_val[xy][0]>>1) + x;
655 int my= (s->motion_val[xy][1]>>1) + y;
656 int i;
657 int max;
658
659 if(mx<0) mx=0;
660 if(my<0) my=0;
661 if(mx>=s->width) mx= s->width -1;
662 if(my>=s->height) my= s->height-1;
663 max= ABS(mx-x);
664 if(ABS(my-y) > max) max= ABS(my-y);
665 /* the ugliest linedrawing routine ... */
666 for(i=0; i<max; i++){
667 int x1= x + (mx-x)*i/max;
668 int y1= y + (my-y)*i/max;
669 ptr[y1*s->linesize + x1]+=100;
670 }
671 ptr[y*s->linesize + x]+=100;
672 s->mbskip_table[mb_x + mb_y*s->mb_width]=0;
673 }
674 }
675
676 }
677 #endif
678 if(s->pict_type==B_TYPE || s->low_delay){
679 *pict= *(AVFrame*)&s->current_picture;
680 } else {
681 *pict= *(AVFrame*)&s->last_picture;
682 }
683
684 /* Return the Picture timestamp as the frame number */
685 /* we substract 1 because it is added on utils.c */
686 avctx->frame_number = s->picture_number - 1;
687
688 /* dont output the last pic after seeking */
689 if(s->last_picture.data[0] || s->low_delay)
690 *data_size = sizeof(AVFrame);
691 #ifdef PRINT_FRAME_TIME
692 printf("%Ld\n", rdtsc()-time);
693 #endif
694 return get_consumed_bytes(s, buf_size);
695 }
696
697 AVCodec mpeg4_decoder = {
698 "mpeg4",
699 CODEC_TYPE_VIDEO,
700 CODEC_ID_MPEG4,
701 sizeof(MpegEncContext),
702 h263_decode_init,
703 NULL,
704 h263_decode_end,
705 h263_decode_frame,
706 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
707 };
708
709 AVCodec h263_decoder = {
710 "h263",
711 CODEC_TYPE_VIDEO,
712 CODEC_ID_H263,
713 sizeof(MpegEncContext),
714 h263_decode_init,
715 NULL,
716 h263_decode_end,
717 h263_decode_frame,
718 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
719 };
720
721 AVCodec msmpeg4v1_decoder = {
722 "msmpeg4v1",
723 CODEC_TYPE_VIDEO,
724 CODEC_ID_MSMPEG4V1,
725 sizeof(MpegEncContext),
726 h263_decode_init,
727 NULL,
728 h263_decode_end,
729 h263_decode_frame,
730 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
731 };
732
733 AVCodec msmpeg4v2_decoder = {
734 "msmpeg4v2",
735 CODEC_TYPE_VIDEO,
736 CODEC_ID_MSMPEG4V2,
737 sizeof(MpegEncContext),
738 h263_decode_init,
739 NULL,
740 h263_decode_end,
741 h263_decode_frame,
742 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
743 };
744
745 AVCodec msmpeg4v3_decoder = {
746 "msmpeg4",
747 CODEC_TYPE_VIDEO,
748 CODEC_ID_MSMPEG4V3,
749 sizeof(MpegEncContext),
750 h263_decode_init,
751 NULL,
752 h263_decode_end,
753 h263_decode_frame,
754 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
755 };
756
757 AVCodec wmv1_decoder = {
758 "wmv1",
759 CODEC_TYPE_VIDEO,
760 CODEC_ID_WMV1,
761 sizeof(MpegEncContext),
762 h263_decode_init,
763 NULL,
764 h263_decode_end,
765 h263_decode_frame,
766 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
767 };
768
769 AVCodec wmv2_decoder = {
770 "wmv2",
771 CODEC_TYPE_VIDEO,
772 CODEC_ID_WMV2,
773 sizeof(MpegEncContext),
774 h263_decode_init,
775 NULL,
776 h263_decode_end,
777 h263_decode_frame,
778 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
779 };
780
781 AVCodec h263i_decoder = {
782 "h263i",
783 CODEC_TYPE_VIDEO,
784 CODEC_ID_H263I,
785 sizeof(MpegEncContext),
786 h263_decode_init,
787 NULL,
788 h263_decode_end,
789 h263_decode_frame,
790 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
791 };
792