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 static int encode_ext_header(Wmv2Context *w){
63 MpegEncContext * const s= &w->s;
67 init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size, NULL, NULL);
69 put_bits(&pb, 5, s->avctx->frame_rate / s->avctx->frame_rate_base); //yes 29.97 -> 29
70 put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
72 put_bits(&pb, 1, w->mspel_bit=1);
73 put_bits(&pb, 1, w->flag3=1);
74 put_bits(&pb, 1, w->abt_flag=1);
75 put_bits(&pb, 1, w->j_type_bit=1);
76 put_bits(&pb, 1, w->top_left_mv_flag=0);
77 put_bits(&pb, 1, w->per_mb_rl_bit=1);
78 put_bits(&pb, 3, code=1);
82 s->slice_height = s->mb_height / code;
87 #ifdef CONFIG_ENCODERS
88 static int wmv2_encode_init(AVCodecContext *avctx){
89 Wmv2Context * const w= avctx->priv_data;
91 if(MPV_encode_init(avctx) < 0)
96 avctx->extradata_size= 4;
97 avctx->extradata= av_mallocz(avctx->extradata_size + 10);
103 static int wmv2_encode_end(AVCodecContext *avctx){
104 Wmv2Context * const w= avctx->priv_data;
106 if(MPV_encode_end(avctx) < 0)
109 avctx->extradata_size= 0;
110 av_freep(&avctx->extradata);
115 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
117 Wmv2Context * const w= (Wmv2Context*)s;
119 put_bits(&s->pb, 1, s->pict_type - 1);
120 if(s->pict_type == I_TYPE){
121 put_bits(&s->pb, 7, 0);
123 put_bits(&s->pb, 5, s->qscale);
125 s->dc_table_index = 1;
126 s->mv_table_index = 1; /* only if P frame */
127 // s->use_skip_mb_code = 1; /* only if P frame */
128 s->per_mb_rl_table = 0;
134 assert(s->flipflop_rounding);
136 if (s->pict_type == I_TYPE) {
137 assert(s->no_rounding==1);
138 if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
140 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
142 if(!s->per_mb_rl_table){
143 code012(&s->pb, s->rl_chroma_table_index);
144 code012(&s->pb, s->rl_table_index);
147 put_bits(&s->pb, 1, s->dc_table_index);
149 s->inter_intra_pred= 0;
153 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
155 code012(&s->pb, cbp_index=0);
158 w->cbp_table_index= map[cbp_index];
159 }else if(s->qscale <= 20){
161 w->cbp_table_index= map[cbp_index];
164 w->cbp_table_index= map[cbp_index];
167 if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
170 put_bits(&s->pb, 1, w->per_mb_abt^1);
172 code012(&s->pb, w->abt_type);
176 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
178 if(!s->per_mb_rl_table){
179 code012(&s->pb, s->rl_table_index);
180 s->rl_chroma_table_index = s->rl_table_index;
182 put_bits(&s->pb, 1, s->dc_table_index);
183 put_bits(&s->pb, 1, s->mv_table_index);
185 s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
187 s->esc3_level_length= 0;
188 s->esc3_run_length= 0;
193 // nearly idential to wmv1 but thats just because we dont use the useless M$ crap features
194 // its duplicated here in case someone wants to add support for these carp features
195 void ff_wmv2_encode_mb(MpegEncContext * s,
196 DCTELEM block[6][64],
197 int motion_x, int motion_y)
199 Wmv2Context * const w= (Wmv2Context*)s;
200 int cbp, coded_cbp, i;
202 uint8_t *coded_block;
208 set_stat(ST_INTER_MB);
210 for (i = 0; i < 6; i++) {
211 if (s->block_last_index[i] >= 0)
216 wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
217 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
220 h263_pred_motion(s, 0, &pred_x, &pred_y);
221 msmpeg4_encode_motion(s, motion_x - pred_x,
227 for (i = 0; i < 6; i++) {
229 val = (s->block_last_index[i] >= 1);
230 cbp |= val << (5 - i);
232 /* predict value for close blocks only for luma */
233 pred = coded_block_pred(s, i, &coded_block);
237 coded_cbp |= val << (5 - i);
241 printf("cbp=%x %x\n", cbp, coded_cbp);
244 if (s->pict_type == I_TYPE) {
245 set_stat(ST_INTRA_MB);
247 table_mb_intra[coded_cbp][1], table_mb_intra[coded_cbp][0]);
250 wmv2_inter_table[w->cbp_table_index][cbp][1],
251 wmv2_inter_table[w->cbp_table_index][cbp][0]);
253 set_stat(ST_INTRA_MB);
254 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
255 if(s->inter_intra_pred){
257 put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
261 for (i = 0; i < 6; i++) {
262 msmpeg4_encode_block(s, block[i], i);
265 #endif //CONFIG_ENCODERS
267 static void parse_mb_skip(Wmv2Context * w){
269 MpegEncContext * const s= &w->s;
270 uint32_t * const mb_type= s->current_picture_ptr->mb_type;
272 w->skip_type= get_bits(&s->gb, 2);
273 switch(w->skip_type){
275 for(mb_y=0; mb_y<s->mb_height; mb_y++){
276 for(mb_x=0; mb_x<s->mb_width; mb_x++){
277 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
282 for(mb_y=0; mb_y<s->mb_height; mb_y++){
283 for(mb_x=0; mb_x<s->mb_width; mb_x++){
284 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
289 for(mb_y=0; mb_y<s->mb_height; mb_y++){
290 if(get_bits1(&s->gb)){
291 for(mb_x=0; mb_x<s->mb_width; mb_x++){
292 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
295 for(mb_x=0; mb_x<s->mb_width; mb_x++){
296 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
302 for(mb_x=0; mb_x<s->mb_width; mb_x++){
303 if(get_bits1(&s->gb)){
304 for(mb_y=0; mb_y<s->mb_height; mb_y++){
305 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
308 for(mb_y=0; mb_y<s->mb_height; mb_y++){
309 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
317 static int decode_ext_header(Wmv2Context *w){
318 MpegEncContext * const s= &w->s;
323 if(s->avctx->extradata_size<4) return -1;
325 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
327 fps = get_bits(&gb, 5);
328 s->bit_rate = get_bits(&gb, 11)*1024;
329 w->mspel_bit = get_bits1(&gb);
330 w->flag3 = get_bits1(&gb);
331 w->abt_flag = get_bits1(&gb);
332 w->j_type_bit = get_bits1(&gb);
333 w->top_left_mv_flag= get_bits1(&gb);
334 w->per_mb_rl_bit = get_bits1(&gb);
335 code = get_bits(&gb, 3);
337 if(code==0) return -1;
339 s->slice_height = s->mb_height / code;
341 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
342 printf("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",
343 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,
349 int ff_wmv2_decode_picture_header(MpegEncContext * s)
351 Wmv2Context * const w= (Wmv2Context*)s;
357 for(i=0; i<s->gb.size*8; i++)
358 printf("%d", get_bits1(&s->gb));
359 // get_bits1(&s->gb);
364 if(s->picture_number==0)
365 decode_ext_header(w);
367 s->pict_type = get_bits(&s->gb, 1) + 1;
368 if(s->pict_type == I_TYPE){
369 code = get_bits(&s->gb, 7);
370 printf("I7:%X/\n", code);
372 s->qscale = get_bits(&s->gb, 5);
379 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
381 Wmv2Context * const w= (Wmv2Context*)s;
383 if (s->pict_type == I_TYPE) {
384 if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
385 else w->j_type= 0; //FIXME check
388 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
389 else s->per_mb_rl_table= 0;
391 if(!s->per_mb_rl_table){
392 s->rl_chroma_table_index = decode012(&s->gb);
393 s->rl_table_index = decode012(&s->gb);
396 s->dc_table_index = get_bits1(&s->gb);
398 s->inter_intra_pred= 0;
400 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
401 printf("qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
403 s->rl_chroma_table_index,
414 cbp_index= decode012(&s->gb);
417 w->cbp_table_index= map[cbp_index];
418 }else if(s->qscale <= 20){
420 w->cbp_table_index= map[cbp_index];
423 w->cbp_table_index= map[cbp_index];
426 if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
427 else s->mspel= 0; //FIXME check
430 w->per_mb_abt= get_bits1(&s->gb)^1;
432 w->abt_type= decode012(&s->gb);
436 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
437 else s->per_mb_rl_table= 0;
439 if(!s->per_mb_rl_table){
440 s->rl_table_index = decode012(&s->gb);
441 s->rl_chroma_table_index = s->rl_table_index;
444 s->dc_table_index = get_bits1(&s->gb);
445 s->mv_table_index = get_bits1(&s->gb);
447 s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
450 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
451 printf("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",
453 s->rl_chroma_table_index,
462 s->inter_intra_pred);
465 s->esc3_level_length= 0;
466 s->esc3_run_length= 0;
468 s->picture_number++; //FIXME ?
472 // return wmv2_decode_j_picture(w); //FIXME
475 printf("J-type picture isnt supported\n");
482 static void ff_wmv2_decode_init(MpegEncContext *s){
485 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
486 MpegEncContext * const s= &w->s;
489 ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
493 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
494 w->hshift= get_bits1(&s->gb);
498 //printf("%d %d ", *mx_ptr, *my_ptr);
503 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
504 MpegEncContext * const s= &w->s;
505 int xy, wrap, diff, type;
506 int16_t *A, *B, *C, *mot_val;
508 wrap = s->block_wrap[0];
509 xy = s->block_index[0];
511 mot_val = s->motion_val[xy];
513 A = s->motion_val[xy - 1];
514 B = s->motion_val[xy - wrap];
515 C = s->motion_val[xy + 2 - wrap];
517 diff= FFMAX(ABS(A[0] - B[0]), ABS(A[1] - B[1]));
519 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag && diff >= 8)
520 type= get_bits1(&s->gb);
531 /* special case for first (slice) line */
532 if (s->first_slice_line) {
536 *px = mid_pred(A[0], B[0], C[0]);
537 *py = mid_pred(A[1], B[1], C[1]);
544 static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
545 MpegEncContext * const s= &w->s;
546 static const int sub_cbp_table[3]= {2,3,1};
550 s->block_last_index[n] = -1;
556 w->abt_type= decode012(&s->gb);
559 printf("B%d", w->abt_type);
561 w->abt_type_table[n]= w->abt_type;
564 // const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
565 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
566 // const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
568 sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
569 // printf("S%d", sub_cbp);
572 if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
577 if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
580 s->block_last_index[n] = 63;
584 return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
588 static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
589 MpegEncContext * const s= &w->s;
592 switch(w->abt_type_table[n]){
594 if (s->block_last_index[n] >= 0) {
595 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 fprintf(stderr, "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, 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, 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, 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, mb_intra_vlc.table, MB_INTRA_VLC_BITS, 2);
743 fprintf(stderr, "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 if(s->per_mb_rl_table){
766 s->rl_table_index = decode012(&s->gb);
767 s->rl_chroma_table_index = s->rl_table_index;
770 if(w->abt_flag && w->per_mb_abt){
771 w->per_block_abt= get_bits1(&s->gb);
772 if(!w->per_block_abt)
773 w->abt_type= decode012(&s->gb);
778 if (wmv2_decode_motion(w, &mx, &my) < 0)
781 s->mv_dir = MV_DIR_FORWARD;
782 s->mv_type = MV_TYPE_16X16;
786 for (i = 0; i < 6; i++) {
787 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
789 fprintf(stderr,"\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
794 //if(s->pict_type==P_TYPE)
795 // printf("%d%d ", s->inter_intra_pred, cbp);
796 //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));
797 s->ac_pred = get_bits1(&s->gb);
798 if(s->inter_intra_pred){
799 s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
800 // printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
802 if(s->per_mb_rl_table && cbp){
803 s->rl_table_index = decode012(&s->gb);
804 s->rl_chroma_table_index = s->rl_table_index;
807 for (i = 0; i < 6; i++) {
808 if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
810 fprintf(stderr,"\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
819 static int wmv2_decode_init(AVCodecContext *avctx){
820 Wmv2Context * const w= avctx->priv_data;
822 if(ff_h263_decode_init(avctx) < 0)
830 AVCodec wmv2_decoder = {
838 ff_h263_decode_frame,
839 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
842 #ifdef CONFIG_ENCODERS
843 AVCodec wmv2_encoder = {