2 * Copyright (c) 2002 The FFmpeg Project.
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "simple_idct.h"
27 #define SKIP_TYPE_NONE 0
28 #define SKIP_TYPE_MPEG 1
29 #define SKIP_TYPE_ROW 2
30 #define SKIP_TYPE_COL 3
33 typedef struct Wmv2Context{
41 int abt_type_table[6];
51 ScanTable abt_scantable[2];
52 DCTELEM abt_block2[6][64] __align8;
55 static void wmv2_common_init(Wmv2Context * w){
56 MpegEncContext * const s= &w->s;
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);
62 #ifdef CONFIG_ENCODERS
64 static int encode_ext_header(Wmv2Context *w){
65 MpegEncContext * const s= &w->s;
69 init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
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));
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);
84 s->slice_height = s->mb_height / code;
89 static int wmv2_encode_init(AVCodecContext *avctx){
90 Wmv2Context * const w= avctx->priv_data;
92 if(MPV_encode_init(avctx) < 0)
97 avctx->extradata_size= 4;
98 avctx->extradata= av_mallocz(avctx->extradata_size + 10);
104 #if 0 /* unused, remove? */
105 static int wmv2_encode_end(AVCodecContext *avctx){
107 if(MPV_encode_end(avctx) < 0)
110 avctx->extradata_size= 0;
111 av_freep(&avctx->extradata);
117 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
119 Wmv2Context * const w= (Wmv2Context*)s;
121 put_bits(&s->pb, 1, s->pict_type - 1);
122 if(s->pict_type == I_TYPE){
123 put_bits(&s->pb, 7, 0);
125 put_bits(&s->pb, 5, s->qscale);
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;
136 assert(s->flipflop_rounding);
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);
142 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
144 if(!s->per_mb_rl_table){
145 code012(&s->pb, s->rl_chroma_table_index);
146 code012(&s->pb, s->rl_table_index);
149 put_bits(&s->pb, 1, s->dc_table_index);
151 s->inter_intra_pred= 0;
155 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
157 code012(&s->pb, cbp_index=0);
160 w->cbp_table_index= map[cbp_index];
161 }else if(s->qscale <= 20){
163 w->cbp_table_index= map[cbp_index];
166 w->cbp_table_index= map[cbp_index];
169 if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
172 put_bits(&s->pb, 1, w->per_mb_abt^1);
174 code012(&s->pb, w->abt_type);
178 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
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;
184 put_bits(&s->pb, 1, s->dc_table_index);
185 put_bits(&s->pb, 1, s->mv_table_index);
187 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
189 s->esc3_level_length= 0;
190 s->esc3_run_length= 0;
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)
201 Wmv2Context * const w= (Wmv2Context*)s;
202 int cbp, coded_cbp, i;
204 uint8_t *coded_block;
210 set_stat(ST_INTER_MB);
212 for (i = 0; i < 6; i++) {
213 if (s->block_last_index[i] >= 0)
218 wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
219 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
222 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
223 msmpeg4_encode_motion(s, motion_x - pred_x,
229 for (i = 0; i < 6; i++) {
231 val = (s->block_last_index[i] >= 1);
232 cbp |= val << (5 - i);
234 /* predict value for close blocks only for luma */
235 pred = coded_block_pred(s, i, &coded_block);
239 coded_cbp |= val << (5 - i);
243 printf("cbp=%x %x\n", cbp, coded_cbp);
246 if (s->pict_type == I_TYPE) {
247 set_stat(ST_INTRA_MB);
249 ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
252 wmv2_inter_table[w->cbp_table_index][cbp][1],
253 wmv2_inter_table[w->cbp_table_index][cbp][0]);
255 set_stat(ST_INTRA_MB);
256 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
257 if(s->inter_intra_pred){
259 put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
263 for (i = 0; i < 6; i++) {
264 msmpeg4_encode_block(s, block[i], i);
267 #endif //CONFIG_ENCODERS
269 static void parse_mb_skip(Wmv2Context * w){
271 MpegEncContext * const s= &w->s;
272 uint32_t * const mb_type= s->current_picture_ptr->mb_type;
274 w->skip_type= get_bits(&s->gb, 2);
275 switch(w->skip_type){
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;
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;
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;
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;
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;
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;
319 static int decode_ext_header(Wmv2Context *w){
320 MpegEncContext * const s= &w->s;
325 if(s->avctx->extradata_size<4) return -1;
327 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
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);
339 if(code==0) return -1;
341 s->slice_height = s->mb_height / code;
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,
351 int ff_wmv2_decode_picture_header(MpegEncContext * s)
353 Wmv2Context * const w= (Wmv2Context*)s;
359 for(i=0; i<s->gb.size*8; i++)
360 printf("%d", get_bits1(&s->gb));
361 // get_bits1(&s->gb);
366 if(s->picture_number==0)
367 decode_ext_header(w);
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);
374 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
381 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
383 Wmv2Context * const w= (Wmv2Context*)s;
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
390 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
391 else s->per_mb_rl_table= 0;
393 if(!s->per_mb_rl_table){
394 s->rl_chroma_table_index = decode012(&s->gb);
395 s->rl_table_index = decode012(&s->gb);
398 s->dc_table_index = get_bits1(&s->gb);
400 s->inter_intra_pred= 0;
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",
405 s->rl_chroma_table_index,
416 cbp_index= decode012(&s->gb);
419 w->cbp_table_index= map[cbp_index];
420 }else if(s->qscale <= 20){
422 w->cbp_table_index= map[cbp_index];
425 w->cbp_table_index= map[cbp_index];
428 if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
429 else s->mspel= 0; //FIXME check
432 w->per_mb_abt= get_bits1(&s->gb)^1;
434 w->abt_type= decode012(&s->gb);
438 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
439 else s->per_mb_rl_table= 0;
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;
446 s->dc_table_index = get_bits1(&s->gb);
447 s->mv_table_index = get_bits1(&s->gb);
449 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
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",
455 s->rl_chroma_table_index,
464 s->inter_intra_pred);
467 s->esc3_level_length= 0;
468 s->esc3_run_length= 0;
470 s->picture_number++; //FIXME ?
474 // return wmv2_decode_j_picture(w); //FIXME
477 av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
484 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
485 MpegEncContext * const s= &w->s;
488 ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
492 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
493 w->hshift= get_bits1(&s->gb);
497 //printf("%d %d ", *mx_ptr, *my_ptr);
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;
508 xy = s->block_index[0];
510 mot_val = s->current_picture.motion_val[0][xy];
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];
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]));
522 type= get_bits1(&s->gb);
533 /* special case for first (slice) line */
534 if (s->first_slice_line) {
538 *px = mid_pred(A[0], B[0], C[0]);
539 *py = mid_pred(A[1], B[1], C[1]);
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};
552 s->block_last_index[n] = -1;
558 w->abt_type= decode012(&s->gb);
561 printf("B%d", w->abt_type);
563 w->abt_type_table[n]= 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;
570 sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
571 // printf("S%d", sub_cbp);
574 if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
579 if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
582 s->block_last_index[n] = 63;
586 return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
590 static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
591 MpegEncContext * const s= &w->s;
593 if (s->block_last_index[n] >= 0) {
594 switch(w->abt_type_table[n]){
596 s->dsp.idct_add (dst, stride, block1);
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));
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));
609 av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
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;
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);
622 if(s->flags&CODEC_FLAG_GRAY) return;
624 wmv2_add_block(w, block1[4], dest_cb , s->uvlinesize, 4);
625 wmv2_add_block(w, block1[5], dest_cr , s->uvlinesize, 5);
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)
633 Wmv2Context * const w= (Wmv2Context*)s;
635 int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
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);
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;
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;
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);
666 if(s->flags&CODEC_FLAG_GRAY) return;
668 if (s->out_format == FMT_H263) {
670 if ((motion_x & 3) != 0)
672 if ((motion_y & 3) != 0)
679 dxy = ((my & 1) << 1) | (mx & 1);
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))
689 src_y = clip(src_y, -8, s->height >> 1);
690 if (src_y == (s->height >> 1))
692 offset = (src_y * uvlinesize) + src_x;
693 ptr = ref_picture[1] + offset;
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;
699 pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
701 ptr = ref_picture[2] + offset;
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;
707 pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
711 static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
713 Wmv2Context * const w= (Wmv2Context*)s;
717 if(w->j_type) return 0;
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])){
724 s->block_last_index[i] = -1;
725 s->mv_dir = MV_DIR_FORWARD;
726 s->mv_type = MV_TYPE_16X16;
734 code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
737 s->mb_intra = (~code & 0x40) >> 6;
742 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
744 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
747 /* predict coded block pattern */
750 int val = ((code >> (5 - i)) & 1);
752 int pred = coded_block_pred(s, i, &coded_val);
756 cbp |= val << (5 - i);
762 //printf("P at %d %d\n", s->mb_x, s->mb_y);
763 wmv2_pred_motion(w, &mx, &my);
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;
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);
780 if (wmv2_decode_motion(w, &mx, &my) < 0)
783 s->mv_dir = MV_DIR_FORWARD;
784 s->mv_type = MV_TYPE_16X16;
788 for (i = 0; i < 6; i++) {
789 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
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);
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);
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;
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)
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);
822 static int wmv2_decode_init(AVCodecContext *avctx){
823 Wmv2Context * const w= avctx->priv_data;
825 if(ff_h263_decode_init(avctx) < 0)
833 AVCodec wmv2_decoder = {
841 ff_h263_decode_frame,
842 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
845 #ifdef CONFIG_ENCODERS
846 AVCodec wmv2_encoder = {