+ int slice_starty = block_w*mb_y;
+ int slice_h = block_w*(mb_y+1);
+ if (!(s->keyframe || s->avctx->debug&512)){
+ slice_starty = FFMAX(0, slice_starty - (block_w >> 1));
+ slice_h -= (block_w >> 1);
+ }
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+ int start_y;
+ int end_y;
+ int our_mb_start = mb_y;
+ int our_mb_end = (mb_y + 1);
+ const int extra= 3;
+ start_y = (mb_y ? ((block_w * our_mb_start) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra: 0);
+ end_y = (((block_w * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);
+ if (!(s->keyframe || s->avctx->debug&512)){
+ start_y = FFMAX(0, start_y - (block_w >> (1+s->spatial_decomposition_count - level)));
+ end_y = FFMAX(0, end_y - (block_w >> (1+s->spatial_decomposition_count - level)));
+ }
+ start_y = FFMIN(b->height, start_y);
+ end_y = FFMIN(b->height, end_y);
+
+ if (start_y != end_y){
+ if (orientation == 0){
+ SubBand * correlate_band = &p->band[0][0];
+ int correlate_end_y = FFMIN(b->height, end_y + 1);
+ int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));
+ decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);
+ correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);
+ dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);
+ }
+ else
+ decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);
+ }