2 * Copyright (c) 2002 The FFmpeg Project.
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "simple_idct.h"
29 #define SKIP_TYPE_NONE 0
30 #define SKIP_TYPE_MPEG 1
31 #define SKIP_TYPE_ROW 2
32 #define SKIP_TYPE_COL 3
35 typedef struct Wmv2Context{
43 int abt_type_table[6];
53 ScanTable abt_scantable[2];
54 DECLARE_ALIGNED_8(DCTELEM, abt_block2[6][64]);
57 static void wmv2_common_init(Wmv2Context * w){
58 MpegEncContext * const s= &w->s;
60 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA);
61 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB);
64 #ifdef CONFIG_ENCODERS
66 static int encode_ext_header(Wmv2Context *w){
67 MpegEncContext * const s= &w->s;
71 init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
73 put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
74 put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
76 put_bits(&pb, 1, w->mspel_bit=1);
77 put_bits(&pb, 1, w->flag3=1);
78 put_bits(&pb, 1, w->abt_flag=1);
79 put_bits(&pb, 1, w->j_type_bit=1);
80 put_bits(&pb, 1, w->top_left_mv_flag=0);
81 put_bits(&pb, 1, w->per_mb_rl_bit=1);
82 put_bits(&pb, 3, code=1);
86 s->slice_height = s->mb_height / code;
91 static int wmv2_encode_init(AVCodecContext *avctx){
92 Wmv2Context * const w= avctx->priv_data;
94 if(MPV_encode_init(avctx) < 0)
99 avctx->extradata_size= 4;
100 avctx->extradata= av_mallocz(avctx->extradata_size + 10);
101 encode_ext_header(w);
106 #if 0 /* unused, remove? */
107 static int wmv2_encode_end(AVCodecContext *avctx){
109 if(MPV_encode_end(avctx) < 0)
112 avctx->extradata_size= 0;
113 av_freep(&avctx->extradata);
119 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
121 Wmv2Context * const w= (Wmv2Context*)s;
123 put_bits(&s->pb, 1, s->pict_type - 1);
124 if(s->pict_type == I_TYPE){
125 put_bits(&s->pb, 7, 0);
127 put_bits(&s->pb, 5, s->qscale);
129 s->dc_table_index = 1;
130 s->mv_table_index = 1; /* only if P frame */
131 // s->use_skip_mb_code = 1; /* only if P frame */
132 s->per_mb_rl_table = 0;
138 assert(s->flipflop_rounding);
140 if (s->pict_type == I_TYPE) {
141 assert(s->no_rounding==1);
142 if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
144 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
146 if(!s->per_mb_rl_table){
147 code012(&s->pb, s->rl_chroma_table_index);
148 code012(&s->pb, s->rl_table_index);
151 put_bits(&s->pb, 1, s->dc_table_index);
153 s->inter_intra_pred= 0;
157 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
159 code012(&s->pb, cbp_index=0);
162 w->cbp_table_index= map[cbp_index];
163 }else if(s->qscale <= 20){
165 w->cbp_table_index= map[cbp_index];
168 w->cbp_table_index= map[cbp_index];
171 if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
174 put_bits(&s->pb, 1, w->per_mb_abt^1);
176 code012(&s->pb, w->abt_type);
180 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
182 if(!s->per_mb_rl_table){
183 code012(&s->pb, s->rl_table_index);
184 s->rl_chroma_table_index = s->rl_table_index;
186 put_bits(&s->pb, 1, s->dc_table_index);
187 put_bits(&s->pb, 1, s->mv_table_index);
189 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
191 s->esc3_level_length= 0;
192 s->esc3_run_length= 0;
197 // nearly idential to wmv1 but thats just because we dont use the useless M$ crap features
198 // its duplicated here in case someone wants to add support for these carp features
199 void ff_wmv2_encode_mb(MpegEncContext * s,
200 DCTELEM block[6][64],
201 int motion_x, int motion_y)
203 Wmv2Context * const w= (Wmv2Context*)s;
204 int cbp, coded_cbp, i;
206 uint8_t *coded_block;
213 for (i = 0; i < 6; i++) {
214 if (s->block_last_index[i] >= 0)
219 wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
220 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
223 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
224 msmpeg4_encode_motion(s, motion_x - pred_x,
230 for (i = 0; i < 6; i++) {
232 val = (s->block_last_index[i] >= 1);
233 cbp |= val << (5 - i);
235 /* predict value for close blocks only for luma */
236 pred = coded_block_pred(s, i, &coded_block);
240 coded_cbp |= val << (5 - i);
244 printf("cbp=%x %x\n", cbp, coded_cbp);
247 if (s->pict_type == I_TYPE) {
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 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
256 if(s->inter_intra_pred){
258 put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
262 for (i = 0; i < 6; i++) {
263 msmpeg4_encode_block(s, block[i], i);
266 #endif //CONFIG_ENCODERS
268 static void parse_mb_skip(Wmv2Context * w){
270 MpegEncContext * const s= &w->s;
271 uint32_t * const mb_type= s->current_picture_ptr->mb_type;
273 w->skip_type= get_bits(&s->gb, 2);
274 switch(w->skip_type){
276 for(mb_y=0; mb_y<s->mb_height; mb_y++){
277 for(mb_x=0; mb_x<s->mb_width; mb_x++){
278 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
283 for(mb_y=0; mb_y<s->mb_height; mb_y++){
284 for(mb_x=0; mb_x<s->mb_width; mb_x++){
285 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
290 for(mb_y=0; mb_y<s->mb_height; mb_y++){
291 if(get_bits1(&s->gb)){
292 for(mb_x=0; mb_x<s->mb_width; mb_x++){
293 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
296 for(mb_x=0; mb_x<s->mb_width; mb_x++){
297 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
303 for(mb_x=0; mb_x<s->mb_width; mb_x++){
304 if(get_bits1(&s->gb)){
305 for(mb_y=0; mb_y<s->mb_height; mb_y++){
306 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
309 for(mb_y=0; mb_y<s->mb_height; mb_y++){
310 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
318 static int decode_ext_header(Wmv2Context *w){
319 MpegEncContext * const s= &w->s;
324 if(s->avctx->extradata_size<4) return -1;
326 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
328 fps = get_bits(&gb, 5);
329 s->bit_rate = get_bits(&gb, 11)*1024;
330 w->mspel_bit = get_bits1(&gb);
331 w->flag3 = get_bits1(&gb);
332 w->abt_flag = get_bits1(&gb);
333 w->j_type_bit = get_bits1(&gb);
334 w->top_left_mv_flag= get_bits1(&gb);
335 w->per_mb_rl_bit = get_bits1(&gb);
336 code = get_bits(&gb, 3);
338 if(code==0) return -1;
340 s->slice_height = s->mb_height / code;
342 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
343 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",
344 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,
350 int ff_wmv2_decode_picture_header(MpegEncContext * s)
352 Wmv2Context * const w= (Wmv2Context*)s;
358 for(i=0; i<s->gb.size*8; i++)
359 printf("%d", get_bits1(&s->gb));
360 // get_bits1(&s->gb);
365 if(s->picture_number==0)
366 decode_ext_header(w);
368 s->pict_type = get_bits(&s->gb, 1) + 1;
369 if(s->pict_type == I_TYPE){
370 code = get_bits(&s->gb, 7);
371 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
373 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
380 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
382 Wmv2Context * const w= (Wmv2Context*)s;
384 if (s->pict_type == I_TYPE) {
385 if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
386 else w->j_type= 0; //FIXME check
389 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
390 else s->per_mb_rl_table= 0;
392 if(!s->per_mb_rl_table){
393 s->rl_chroma_table_index = decode012(&s->gb);
394 s->rl_table_index = decode012(&s->gb);
397 s->dc_table_index = get_bits1(&s->gb);
399 s->inter_intra_pred= 0;
401 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
402 av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
404 s->rl_chroma_table_index,
415 cbp_index= decode012(&s->gb);
418 w->cbp_table_index= map[cbp_index];
419 }else if(s->qscale <= 20){
421 w->cbp_table_index= map[cbp_index];
424 w->cbp_table_index= map[cbp_index];
427 if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
428 else s->mspel= 0; //FIXME check
431 w->per_mb_abt= get_bits1(&s->gb)^1;
433 w->abt_type= decode012(&s->gb);
437 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
438 else s->per_mb_rl_table= 0;
440 if(!s->per_mb_rl_table){
441 s->rl_table_index = decode012(&s->gb);
442 s->rl_chroma_table_index = s->rl_table_index;
445 s->dc_table_index = get_bits1(&s->gb);
446 s->mv_table_index = get_bits1(&s->gb);
448 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
451 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
452 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_chroma_table_index,
463 s->inter_intra_pred);
466 s->esc3_level_length= 0;
467 s->esc3_run_length= 0;
469 s->picture_number++; //FIXME ?
473 // return wmv2_decode_j_picture(w); //FIXME
476 av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
483 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
484 MpegEncContext * const s= &w->s;
487 ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
491 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
492 w->hshift= get_bits1(&s->gb);
496 //printf("%d %d ", *mx_ptr, *my_ptr);
501 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
502 MpegEncContext * const s= &w->s;
503 int xy, wrap, diff, type;
504 int16_t *A, *B, *C, *mot_val;
507 xy = s->block_index[0];
509 mot_val = s->current_picture.motion_val[0][xy];
511 A = s->current_picture.motion_val[0][xy - 1];
512 B = s->current_picture.motion_val[0][xy - wrap];
513 C = s->current_picture.motion_val[0][xy + 2 - wrap];
515 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
516 diff= FFMAX(ABS(A[0] - B[0]), ABS(A[1] - B[1]));
521 type= get_bits1(&s->gb);
532 /* special case for first (slice) line */
533 if (s->first_slice_line) {
537 *px = mid_pred(A[0], B[0], C[0]);
538 *py = mid_pred(A[1], B[1], C[1]);
545 static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
546 MpegEncContext * const s= &w->s;
547 static const int sub_cbp_table[3]= {2,3,1};
551 s->block_last_index[n] = -1;
557 w->abt_type= decode012(&s->gb);
560 printf("B%d", w->abt_type);
562 w->abt_type_table[n]= w->abt_type;
565 // const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
566 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
567 // const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
569 sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
570 // printf("S%d", sub_cbp);
573 if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
578 if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
581 s->block_last_index[n] = 63;
585 return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
589 static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
590 MpegEncContext * const s= &w->s;
592 if (s->block_last_index[n] >= 0) {
593 switch(w->abt_type_table[n]){
595 s->dsp.idct_add (dst, stride, block1);
598 simple_idct84_add(dst , stride, block1);
599 simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
600 memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
603 simple_idct48_add(dst , stride, block1);
604 simple_idct48_add(dst + 4 , stride, w->abt_block2[n]);
605 memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
608 av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
613 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
614 Wmv2Context * const w= (Wmv2Context*)s;
616 wmv2_add_block(w, block1[0], dest_y , s->linesize, 0);
617 wmv2_add_block(w, block1[1], dest_y + 8 , s->linesize, 1);
618 wmv2_add_block(w, block1[2], dest_y + 8*s->linesize, s->linesize, 2);
619 wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
621 if(s->flags&CODEC_FLAG_GRAY) return;
623 wmv2_add_block(w, block1[4], dest_cb , s->uvlinesize, 4);
624 wmv2_add_block(w, block1[5], dest_cr , s->uvlinesize, 5);
627 void ff_mspel_motion(MpegEncContext *s,
628 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
629 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
630 int motion_x, int motion_y, int h)
632 Wmv2Context * const w= (Wmv2Context*)s;
634 int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
637 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
638 dxy = 2*dxy + w->hshift;
639 src_x = s->mb_x * 16 + (motion_x >> 1);
640 src_y = s->mb_y * 16 + (motion_y >> 1);
642 /* WARNING: do no forget half pels */
643 v_edge_pos = s->v_edge_pos;
644 src_x = clip(src_x, -16, s->width);
645 src_y = clip(src_y, -16, s->height);
646 linesize = s->linesize;
647 uvlinesize = s->uvlinesize;
648 ptr = ref_picture[0] + (src_y * linesize) + src_x;
650 if(s->flags&CODEC_FLAG_EMU_EDGE){
651 if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos
652 || src_y + h+1 >= v_edge_pos){
653 ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
654 src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
655 ptr= s->edge_emu_buffer + 1 + s->linesize;
660 s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize);
661 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize);
662 s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize);
663 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
665 if(s->flags&CODEC_FLAG_GRAY) return;
667 if (s->out_format == FMT_H263) {
669 if ((motion_x & 3) != 0)
671 if ((motion_y & 3) != 0)
678 dxy = ((my & 1) << 1) | (mx & 1);
683 src_x = s->mb_x * 8 + mx;
684 src_y = s->mb_y * 8 + my;
685 src_x = clip(src_x, -8, s->width >> 1);
686 if (src_x == (s->width >> 1))
688 src_y = clip(src_y, -8, s->height >> 1);
689 if (src_y == (s->height >> 1))
691 offset = (src_y * uvlinesize) + src_x;
692 ptr = ref_picture[1] + offset;
694 ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
695 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
696 ptr= s->edge_emu_buffer;
698 pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
700 ptr = ref_picture[2] + offset;
702 ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
703 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
704 ptr= s->edge_emu_buffer;
706 pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
710 static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
712 Wmv2Context * const w= (Wmv2Context*)s;
716 if(w->j_type) return 0;
718 if (s->pict_type == P_TYPE) {
719 if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
723 s->block_last_index[i] = -1;
724 s->mv_dir = MV_DIR_FORWARD;
725 s->mv_type = MV_TYPE_16X16;
733 code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
736 s->mb_intra = (~code & 0x40) >> 6;
741 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
743 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
746 /* predict coded block pattern */
749 int val = ((code >> (5 - i)) & 1);
751 int pred = coded_block_pred(s, i, &coded_val);
755 cbp |= val << (5 - i);
761 //printf("P at %d %d\n", s->mb_x, s->mb_y);
762 wmv2_pred_motion(w, &mx, &my);
765 s->dsp.clear_blocks(s->block[0]);
766 if(s->per_mb_rl_table){
767 s->rl_table_index = decode012(&s->gb);
768 s->rl_chroma_table_index = s->rl_table_index;
771 if(w->abt_flag && w->per_mb_abt){
772 w->per_block_abt= get_bits1(&s->gb);
773 if(!w->per_block_abt)
774 w->abt_type= decode012(&s->gb);
779 if (wmv2_decode_motion(w, &mx, &my) < 0)
782 s->mv_dir = MV_DIR_FORWARD;
783 s->mv_type = MV_TYPE_16X16;
787 for (i = 0; i < 6; i++) {
788 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
790 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
795 //if(s->pict_type==P_TYPE)
796 // printf("%d%d ", s->inter_intra_pred, cbp);
797 //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));
798 s->ac_pred = get_bits1(&s->gb);
799 if(s->inter_intra_pred){
800 s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
801 // printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
803 if(s->per_mb_rl_table && cbp){
804 s->rl_table_index = decode012(&s->gb);
805 s->rl_chroma_table_index = s->rl_table_index;
808 s->dsp.clear_blocks(s->block[0]);
809 for (i = 0; i < 6; i++) {
810 if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
812 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
821 static int wmv2_decode_init(AVCodecContext *avctx){
822 Wmv2Context * const w= avctx->priv_data;
824 if(ff_h263_decode_init(avctx) < 0)
832 AVCodec wmv2_decoder = {
840 ff_h263_decode_frame,
841 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
844 #ifdef CONFIG_ENCODERS
845 AVCodec wmv2_encoder = {
853 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},