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ffmpeg.wasm-core
Commit 820089cb authored by Kostya Shishkov's avatar Kostya Shishkov
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421l: fix loop filter for P-frames in VC-1 

Originally committed as revision 16576 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 34f3f6d1
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Showing with 16 additions and 8 deletions
libavcodec/vc1.c
View file @ 820089cb
......@@ -3205,8 +3205,8 @@ static int vc1_decode_p_mb(VC1Context *v)
left_cbp = v->cbp[s->mb_x - 1] >> (i * 4);
top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);
}else{
left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
}
if(left_cbp & 0xC)
vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);
......@@ -3222,9 +3222,13 @@ static int vc1_decode_p_mb(VC1Context *v)
left_cbp = v->cbp[s->mb_x - 1] >> (i * 4);
top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);
}else{
left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
}
if(left_cbp & 0xC)
vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);
if(top_cbp & 0xA)
vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);
}
pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp);
block_cbp |= pat << (i << 2);
......@@ -3332,8 +3336,8 @@ static int vc1_decode_p_mb(VC1Context *v)
left_cbp = v->cbp[s->mb_x - 1] >> (i * 4);
top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);
}else{
left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
}
if(left_cbp & 0xC)
vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);
......@@ -3349,9 +3353,13 @@ static int vc1_decode_p_mb(VC1Context *v)
left_cbp = v->cbp[s->mb_x - 1] >> (i * 4);
top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);
}else{
left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4));
top_cbp = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));
}
if(left_cbp & 0xC)
vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);
if(top_cbp & 0xA)
vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);
}
pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp);
block_cbp |= pat << (i << 2);
......
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