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[libav.git] / libavcodec / wmv2.c
1 /*
2 * Copyright (c) 2002 The FFmpeg Project.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 */
19
20 /**
21 * @file wmv2.c
22 * wmv2 codec.
23 */
24
25 #include "simple_idct.h"
26
27 #define SKIP_TYPE_NONE 0
28 #define SKIP_TYPE_MPEG 1
29 #define SKIP_TYPE_ROW 2
30 #define SKIP_TYPE_COL 3
31
32
33 typedef struct Wmv2Context{
34 MpegEncContext s;
35 int j_type_bit;
36 int j_type;
37 int flag3;
38 int flag63;
39 int abt_flag;
40 int abt_type;
41 int abt_type_table[6];
42 int per_mb_abt;
43 int per_block_abt;
44 int mspel_bit;
45 int cbp_table_index;
46 int top_left_mv_flag;
47 int per_mb_rl_bit;
48 int skip_type;
49 int hshift;
50
51 ScanTable abt_scantable[2];
52 DCTELEM abt_block2[6][64] __align8;
53 }Wmv2Context;
54
55 static void wmv2_common_init(Wmv2Context * w){
56 MpegEncContext * const s= &w->s;
57
58 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA);
59 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB);
60 }
61
62 #ifdef CONFIG_ENCODERS
63
64 static int encode_ext_header(Wmv2Context *w){
65 MpegEncContext * const s= &w->s;
66 PutBitContext pb;
67 int code;
68
69 init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
70
71 put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
72 put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
73
74 put_bits(&pb, 1, w->mspel_bit=1);
75 put_bits(&pb, 1, w->flag3=1);
76 put_bits(&pb, 1, w->abt_flag=1);
77 put_bits(&pb, 1, w->j_type_bit=1);
78 put_bits(&pb, 1, w->top_left_mv_flag=0);
79 put_bits(&pb, 1, w->per_mb_rl_bit=1);
80 put_bits(&pb, 3, code=1);
81
82 flush_put_bits(&pb);
83
84 s->slice_height = s->mb_height / code;
85
86 return 0;
87 }
88
89 static int wmv2_encode_init(AVCodecContext *avctx){
90 Wmv2Context * const w= avctx->priv_data;
91
92 if(MPV_encode_init(avctx) < 0)
93 return -1;
94
95 wmv2_common_init(w);
96
97 avctx->extradata_size= 4;
98 avctx->extradata= av_mallocz(avctx->extradata_size + 10);
99 encode_ext_header(w);
100
101 return 0;
102 }
103
104 #if 0 /* unused, remove? */
105 static int wmv2_encode_end(AVCodecContext *avctx){
106
107 if(MPV_encode_end(avctx) < 0)
108 return -1;
109
110 avctx->extradata_size= 0;
111 av_freep(&avctx->extradata);
112
113 return 0;
114 }
115 #endif
116
117 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
118 {
119 Wmv2Context * const w= (Wmv2Context*)s;
120
121 put_bits(&s->pb, 1, s->pict_type - 1);
122 if(s->pict_type == I_TYPE){
123 put_bits(&s->pb, 7, 0);
124 }
125 put_bits(&s->pb, 5, s->qscale);
126
127 s->dc_table_index = 1;
128 s->mv_table_index = 1; /* only if P frame */
129 // s->use_skip_mb_code = 1; /* only if P frame */
130 s->per_mb_rl_table = 0;
131 s->mspel= 0;
132 w->per_mb_abt=0;
133 w->abt_type=0;
134 w->j_type=0;
135
136 assert(s->flipflop_rounding);
137
138 if (s->pict_type == I_TYPE) {
139 assert(s->no_rounding==1);
140 if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
141
142 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
143
144 if(!s->per_mb_rl_table){
145 code012(&s->pb, s->rl_chroma_table_index);
146 code012(&s->pb, s->rl_table_index);
147 }
148
149 put_bits(&s->pb, 1, s->dc_table_index);
150
151 s->inter_intra_pred= 0;
152 }else{
153 int cbp_index;
154
155 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
156
157 code012(&s->pb, cbp_index=0);
158 if(s->qscale <= 10){
159 int map[3]= {0,2,1};
160 w->cbp_table_index= map[cbp_index];
161 }else if(s->qscale <= 20){
162 int map[3]= {1,0,2};
163 w->cbp_table_index= map[cbp_index];
164 }else{
165 int map[3]= {2,1,0};
166 w->cbp_table_index= map[cbp_index];
167 }
168
169 if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
170
171 if(w->abt_flag){
172 put_bits(&s->pb, 1, w->per_mb_abt^1);
173 if(!w->per_mb_abt){
174 code012(&s->pb, w->abt_type);
175 }
176 }
177
178 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
179
180 if(!s->per_mb_rl_table){
181 code012(&s->pb, s->rl_table_index);
182 s->rl_chroma_table_index = s->rl_table_index;
183 }
184 put_bits(&s->pb, 1, s->dc_table_index);
185 put_bits(&s->pb, 1, s->mv_table_index);
186
187 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
188 }
189 s->esc3_level_length= 0;
190 s->esc3_run_length= 0;
191
192 return 0;
193 }
194
195 // nearly idential to wmv1 but thats just because we dont use the useless M$ crap features
196 // its duplicated here in case someone wants to add support for these carp features
197 void ff_wmv2_encode_mb(MpegEncContext * s,
198 DCTELEM block[6][64],
199 int motion_x, int motion_y)
200 {
201 Wmv2Context * const w= (Wmv2Context*)s;
202 int cbp, coded_cbp, i;
203 int pred_x, pred_y;
204 uint8_t *coded_block;
205
206 handle_slices(s);
207
208 if (!s->mb_intra) {
209 /* compute cbp */
210 set_stat(ST_INTER_MB);
211 cbp = 0;
212 for (i = 0; i < 6; i++) {
213 if (s->block_last_index[i] >= 0)
214 cbp |= 1 << (5 - i);
215 }
216
217 put_bits(&s->pb,
218 wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
219 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
220
221 /* motion vector */
222 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
223 msmpeg4_encode_motion(s, motion_x - pred_x,
224 motion_y - pred_y);
225 } else {
226 /* compute cbp */
227 cbp = 0;
228 coded_cbp = 0;
229 for (i = 0; i < 6; i++) {
230 int val, pred;
231 val = (s->block_last_index[i] >= 1);
232 cbp |= val << (5 - i);
233 if (i < 4) {
234 /* predict value for close blocks only for luma */
235 pred = coded_block_pred(s, i, &coded_block);
236 *coded_block = val;
237 val = val ^ pred;
238 }
239 coded_cbp |= val << (5 - i);
240 }
241 #if 0
242 if (coded_cbp)
243 printf("cbp=%x %x\n", cbp, coded_cbp);
244 #endif
245
246 if (s->pict_type == I_TYPE) {
247 set_stat(ST_INTRA_MB);
248 put_bits(&s->pb,
249 ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
250 } else {
251 put_bits(&s->pb,
252 wmv2_inter_table[w->cbp_table_index][cbp][1],
253 wmv2_inter_table[w->cbp_table_index][cbp][0]);
254 }
255 set_stat(ST_INTRA_MB);
256 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
257 if(s->inter_intra_pred){
258 s->h263_aic_dir=0;
259 put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
260 }
261 }
262
263 for (i = 0; i < 6; i++) {
264 msmpeg4_encode_block(s, block[i], i);
265 }
266 }
267 #endif //CONFIG_ENCODERS
268
269 static void parse_mb_skip(Wmv2Context * w){
270 int mb_x, mb_y;
271 MpegEncContext * const s= &w->s;
272 uint32_t * const mb_type= s->current_picture_ptr->mb_type;
273
274 w->skip_type= get_bits(&s->gb, 2);
275 switch(w->skip_type){
276 case SKIP_TYPE_NONE:
277 for(mb_y=0; mb_y<s->mb_height; mb_y++){
278 for(mb_x=0; mb_x<s->mb_width; mb_x++){
279 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
280 }
281 }
282 break;
283 case SKIP_TYPE_MPEG:
284 for(mb_y=0; mb_y<s->mb_height; mb_y++){
285 for(mb_x=0; mb_x<s->mb_width; mb_x++){
286 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
287 }
288 }
289 break;
290 case SKIP_TYPE_ROW:
291 for(mb_y=0; mb_y<s->mb_height; mb_y++){
292 if(get_bits1(&s->gb)){
293 for(mb_x=0; mb_x<s->mb_width; mb_x++){
294 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
295 }
296 }else{
297 for(mb_x=0; mb_x<s->mb_width; mb_x++){
298 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
299 }
300 }
301 }
302 break;
303 case SKIP_TYPE_COL:
304 for(mb_x=0; mb_x<s->mb_width; mb_x++){
305 if(get_bits1(&s->gb)){
306 for(mb_y=0; mb_y<s->mb_height; mb_y++){
307 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
308 }
309 }else{
310 for(mb_y=0; mb_y<s->mb_height; mb_y++){
311 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
312 }
313 }
314 }
315 break;
316 }
317 }
318
319 static int decode_ext_header(Wmv2Context *w){
320 MpegEncContext * const s= &w->s;
321 GetBitContext gb;
322 int fps;
323 int code;
324
325 if(s->avctx->extradata_size<4) return -1;
326
327 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
328
329 fps = get_bits(&gb, 5);
330 s->bit_rate = get_bits(&gb, 11)*1024;
331 w->mspel_bit = get_bits1(&gb);
332 w->flag3 = get_bits1(&gb);
333 w->abt_flag = get_bits1(&gb);
334 w->j_type_bit = get_bits1(&gb);
335 w->top_left_mv_flag= get_bits1(&gb);
336 w->per_mb_rl_bit = get_bits1(&gb);
337 code = get_bits(&gb, 3);
338
339 if(code==0) return -1;
340
341 s->slice_height = s->mb_height / code;
342
343 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
344 av_log(s->avctx, AV_LOG_DEBUG, "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, tl_mv_flag:%d, mbrl_bit:%d, code:%d, flag3:%d, slices:%d\n",
345 fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit, w->top_left_mv_flag, w->per_mb_rl_bit, code, w->flag3,
346 code);
347 }
348 return 0;
349 }
350
351 int ff_wmv2_decode_picture_header(MpegEncContext * s)
352 {
353 Wmv2Context * const w= (Wmv2Context*)s;
354 int code;
355
356 #if 0
357 {
358 int i;
359 for(i=0; i<s->gb.size*8; i++)
360 printf("%d", get_bits1(&s->gb));
361 // get_bits1(&s->gb);
362 printf("END\n");
363 return -1;
364 }
365 #endif
366 if(s->picture_number==0)
367 decode_ext_header(w);
368
369 s->pict_type = get_bits(&s->gb, 1) + 1;
370 if(s->pict_type == I_TYPE){
371 code = get_bits(&s->gb, 7);
372 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
373 }
374 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
375 if(s->qscale < 0)
376 return -1;
377
378 return 0;
379 }
380
381 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
382 {
383 Wmv2Context * const w= (Wmv2Context*)s;
384
385 if (s->pict_type == I_TYPE) {
386 if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
387 else w->j_type= 0; //FIXME check
388
389 if(!w->j_type){
390 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
391 else s->per_mb_rl_table= 0;
392
393 if(!s->per_mb_rl_table){
394 s->rl_chroma_table_index = decode012(&s->gb);
395 s->rl_table_index = decode012(&s->gb);
396 }
397
398 s->dc_table_index = get_bits1(&s->gb);
399 }
400 s->inter_intra_pred= 0;
401 s->no_rounding = 1;
402 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
403 av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
404 s->qscale,
405 s->rl_chroma_table_index,
406 s->rl_table_index,
407 s->dc_table_index,
408 s->per_mb_rl_table,
409 w->j_type);
410 }
411 }else{
412 int cbp_index;
413 w->j_type=0;
414
415 parse_mb_skip(w);
416 cbp_index= decode012(&s->gb);
417 if(s->qscale <= 10){
418 int map[3]= {0,2,1};
419 w->cbp_table_index= map[cbp_index];
420 }else if(s->qscale <= 20){
421 int map[3]= {1,0,2};
422 w->cbp_table_index= map[cbp_index];
423 }else{
424 int map[3]= {2,1,0};
425 w->cbp_table_index= map[cbp_index];
426 }
427
428 if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
429 else s->mspel= 0; //FIXME check
430
431 if(w->abt_flag){
432 w->per_mb_abt= get_bits1(&s->gb)^1;
433 if(!w->per_mb_abt){
434 w->abt_type= decode012(&s->gb);
435 }
436 }
437
438 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
439 else s->per_mb_rl_table= 0;
440
441 if(!s->per_mb_rl_table){
442 s->rl_table_index = decode012(&s->gb);
443 s->rl_chroma_table_index = s->rl_table_index;
444 }
445
446 s->dc_table_index = get_bits1(&s->gb);
447 s->mv_table_index = get_bits1(&s->gb);
448
449 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
450 s->no_rounding ^= 1;
451
452 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
453 av_log(s->avctx, AV_LOG_DEBUG, "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
454 s->rl_table_index,
455 s->rl_chroma_table_index,
456 s->dc_table_index,
457 s->mv_table_index,
458 s->per_mb_rl_table,
459 s->qscale,
460 s->mspel,
461 w->per_mb_abt,
462 w->abt_type,
463 w->cbp_table_index,
464 s->inter_intra_pred);
465 }
466 }
467 s->esc3_level_length= 0;
468 s->esc3_run_length= 0;
469
470 s->picture_number++; //FIXME ?
471
472
473 // if(w->j_type)
474 // return wmv2_decode_j_picture(w); //FIXME
475
476 if(w->j_type){
477 av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
478 return -1;
479 }
480
481 return 0;
482 }
483
484 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
485 MpegEncContext * const s= &w->s;
486 int ret;
487
488 ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
489
490 if(ret<0) return -1;
491
492 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
493 w->hshift= get_bits1(&s->gb);
494 else
495 w->hshift= 0;
496
497 //printf("%d %d ", *mx_ptr, *my_ptr);
498
499 return 0;
500 }
501
502 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
503 MpegEncContext * const s= &w->s;
504 int xy, wrap, diff, type;
505 int16_t *A, *B, *C, *mot_val;
506
507 wrap = s->b8_stride;
508 xy = s->block_index[0];
509
510 mot_val = s->current_picture.motion_val[0][xy];
511
512 A = s->current_picture.motion_val[0][xy - 1];
513 B = s->current_picture.motion_val[0][xy - wrap];
514 C = s->current_picture.motion_val[0][xy + 2 - wrap];
515
516 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
517 diff= FFMAX(ABS(A[0] - B[0]), ABS(A[1] - B[1]));
518 else
519 diff=0;
520
521 if(diff >= 8)
522 type= get_bits1(&s->gb);
523 else
524 type= 2;
525
526 if(type == 0){
527 *px= A[0];
528 *py= A[1];
529 }else if(type == 1){
530 *px= B[0];
531 *py= B[1];
532 }else{
533 /* special case for first (slice) line */
534 if (s->first_slice_line) {
535 *px = A[0];
536 *py = A[1];
537 } else {
538 *px = mid_pred(A[0], B[0], C[0]);
539 *py = mid_pred(A[1], B[1], C[1]);
540 }
541 }
542
543 return mot_val;
544 }
545
546 static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
547 MpegEncContext * const s= &w->s;
548 static const int sub_cbp_table[3]= {2,3,1};
549 int sub_cbp;
550
551 if(!cbp){
552 s->block_last_index[n] = -1;
553
554 return 0;
555 }
556
557 if(w->per_block_abt)
558 w->abt_type= decode012(&s->gb);
559 #if 0
560 if(w->per_block_abt)
561 printf("B%d", w->abt_type);
562 #endif
563 w->abt_type_table[n]= w->abt_type;
564
565 if(w->abt_type){
566 // const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
567 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
568 // const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
569
570 sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
571 // printf("S%d", sub_cbp);
572
573 if(sub_cbp&1){
574 if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
575 return -1;
576 }
577
578 if(sub_cbp&2){
579 if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
580 return -1;
581 }
582 s->block_last_index[n] = 63;
583
584 return 0;
585 }else{
586 return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
587 }
588 }
589
590 static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
591 MpegEncContext * const s= &w->s;
592
593 if (s->block_last_index[n] >= 0) {
594 switch(w->abt_type_table[n]){
595 case 0:
596 s->dsp.idct_add (dst, stride, block1);
597 break;
598 case 1:
599 simple_idct84_add(dst , stride, block1);
600 simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
601 memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
602 break;
603 case 2:
604 simple_idct48_add(dst , stride, block1);
605 simple_idct48_add(dst + 4 , stride, w->abt_block2[n]);
606 memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
607 break;
608 default:
609 av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
610 }
611 }
612 }
613
614 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
615 Wmv2Context * const w= (Wmv2Context*)s;
616
617 wmv2_add_block(w, block1[0], dest_y , s->linesize, 0);
618 wmv2_add_block(w, block1[1], dest_y + 8 , s->linesize, 1);
619 wmv2_add_block(w, block1[2], dest_y + 8*s->linesize, s->linesize, 2);
620 wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
621
622 if(s->flags&CODEC_FLAG_GRAY) return;
623
624 wmv2_add_block(w, block1[4], dest_cb , s->uvlinesize, 4);
625 wmv2_add_block(w, block1[5], dest_cr , s->uvlinesize, 5);
626 }
627
628 void ff_mspel_motion(MpegEncContext *s,
629 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
630 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
631 int motion_x, int motion_y, int h)
632 {
633 Wmv2Context * const w= (Wmv2Context*)s;
634 uint8_t *ptr;
635 int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
636 int emu=0;
637
638 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
639 dxy = 2*dxy + w->hshift;
640 src_x = s->mb_x * 16 + (motion_x >> 1);
641 src_y = s->mb_y * 16 + (motion_y >> 1);
642
643 /* WARNING: do no forget half pels */
644 v_edge_pos = s->v_edge_pos;
645 src_x = clip(src_x, -16, s->width);
646 src_y = clip(src_y, -16, s->height);
647 linesize = s->linesize;
648 uvlinesize = s->uvlinesize;
649 ptr = ref_picture[0] + (src_y * linesize) + src_x;
650
651 if(s->flags&CODEC_FLAG_EMU_EDGE){
652 if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos
653 || src_y + h+1 >= v_edge_pos){
654 ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
655 src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
656 ptr= s->edge_emu_buffer + 1 + s->linesize;
657 emu=1;
658 }
659 }
660
661 s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize);
662 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize);
663 s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize);
664 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
665
666 if(s->flags&CODEC_FLAG_GRAY) return;
667
668 if (s->out_format == FMT_H263) {
669 dxy = 0;
670 if ((motion_x & 3) != 0)
671 dxy |= 1;
672 if ((motion_y & 3) != 0)
673 dxy |= 2;
674 mx = motion_x >> 2;
675 my = motion_y >> 2;
676 } else {
677 mx = motion_x / 2;
678 my = motion_y / 2;
679 dxy = ((my & 1) << 1) | (mx & 1);
680 mx >>= 1;
681 my >>= 1;
682 }
683
684 src_x = s->mb_x * 8 + mx;
685 src_y = s->mb_y * 8 + my;
686 src_x = clip(src_x, -8, s->width >> 1);
687 if (src_x == (s->width >> 1))
688 dxy &= ~1;
689 src_y = clip(src_y, -8, s->height >> 1);
690 if (src_y == (s->height >> 1))
691 dxy &= ~2;
692 offset = (src_y * uvlinesize) + src_x;
693 ptr = ref_picture[1] + offset;
694 if(emu){
695 ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
696 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
697 ptr= s->edge_emu_buffer;
698 }
699 pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
700
701 ptr = ref_picture[2] + offset;
702 if(emu){
703 ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
704 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
705 ptr= s->edge_emu_buffer;
706 }
707 pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
708 }
709
710
711 static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
712 {
713 Wmv2Context * const w= (Wmv2Context*)s;
714 int cbp, code, i;
715 uint8_t *coded_val;
716
717 if(w->j_type) return 0;
718
719 if (s->pict_type == P_TYPE) {
720 if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
721 /* skip mb */
722 s->mb_intra = 0;
723 for(i=0;i<6;i++)
724 s->block_last_index[i] = -1;
725 s->mv_dir = MV_DIR_FORWARD;
726 s->mv_type = MV_TYPE_16X16;
727 s->mv[0][0][0] = 0;
728 s->mv[0][0][1] = 0;
729 s->mb_skipped = 1;
730 w->hshift=0;
731 return 0;
732 }
733
734 code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
735 if (code < 0)
736 return -1;
737 s->mb_intra = (~code & 0x40) >> 6;
738
739 cbp = code & 0x3f;
740 } else {
741 s->mb_intra = 1;
742 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
743 if (code < 0){
744 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
745 return -1;
746 }
747 /* predict coded block pattern */
748 cbp = 0;
749 for(i=0;i<6;i++) {
750 int val = ((code >> (5 - i)) & 1);
751 if (i < 4) {
752 int pred = coded_block_pred(s, i, &coded_val);
753 val = val ^ pred;
754 *coded_val = val;
755 }
756 cbp |= val << (5 - i);
757 }
758 }
759
760 if (!s->mb_intra) {
761 int mx, my;
762 //printf("P at %d %d\n", s->mb_x, s->mb_y);
763 wmv2_pred_motion(w, &mx, &my);
764
765 if(cbp){
766 s->dsp.clear_blocks(s->block[0]);
767 if(s->per_mb_rl_table){
768 s->rl_table_index = decode012(&s->gb);
769 s->rl_chroma_table_index = s->rl_table_index;
770 }
771
772 if(w->abt_flag && w->per_mb_abt){
773 w->per_block_abt= get_bits1(&s->gb);
774 if(!w->per_block_abt)
775 w->abt_type= decode012(&s->gb);
776 }else
777 w->per_block_abt=0;
778 }
779
780 if (wmv2_decode_motion(w, &mx, &my) < 0)
781 return -1;
782
783 s->mv_dir = MV_DIR_FORWARD;
784 s->mv_type = MV_TYPE_16X16;
785 s->mv[0][0][0] = mx;
786 s->mv[0][0][1] = my;
787
788 for (i = 0; i < 6; i++) {
789 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
790 {
791 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
792 return -1;
793 }
794 }
795 } else {
796 //if(s->pict_type==P_TYPE)
797 // printf("%d%d ", s->inter_intra_pred, cbp);
798 //printf("I at %d %d %d %06X\n", s->mb_x, s->mb_y, ((cbp&3)? 1 : 0) +((cbp&0x3C)? 2 : 0), show_bits(&s->gb, 24));
799 s->ac_pred = get_bits1(&s->gb);
800 if(s->inter_intra_pred){
801 s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
802 // printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
803 }
804 if(s->per_mb_rl_table && cbp){
805 s->rl_table_index = decode012(&s->gb);
806 s->rl_chroma_table_index = s->rl_table_index;
807 }
808
809 s->dsp.clear_blocks(s->block[0]);
810 for (i = 0; i < 6; i++) {
811 if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
812 {
813 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
814 return -1;
815 }
816 }
817 }
818
819 return 0;
820 }
821
822 static int wmv2_decode_init(AVCodecContext *avctx){
823 Wmv2Context * const w= avctx->priv_data;
824
825 if(ff_h263_decode_init(avctx) < 0)
826 return -1;
827
828 wmv2_common_init(w);
829
830 return 0;
831 }
832
833 AVCodec wmv2_decoder = {
834 "wmv2",
835 CODEC_TYPE_VIDEO,
836 CODEC_ID_WMV2,
837 sizeof(Wmv2Context),
838 wmv2_decode_init,
839 NULL,
840 ff_h263_decode_end,
841 ff_h263_decode_frame,
842 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
843 };
844
845 #ifdef CONFIG_ENCODERS
846 AVCodec wmv2_encoder = {
847 "wmv2",
848 CODEC_TYPE_VIDEO,
849 CODEC_ID_WMV2,
850 sizeof(Wmv2Context),
851 wmv2_encode_init,
852 MPV_encode_picture,
853 MPV_encode_end,
854 };
855 #endif