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vp9: apply mv scaling workaround only when subsampling is enabled.

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This commit is contained in:
Ronald S. Bultje 2015-05-14 17:05:18 -04:00
parent dc96c0f9fc
commit 1e4a77d001
1 changed files with 14 additions and 4 deletions
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18
libavcodec/vp9.c
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@ -2782,13 +2782,23 @@ static av_always_inline void mc_chroma_scaled(VP9Context *s, vp9_scaled_mc_func
int bw, int bh, int w, int h, int bytesperpixel,
const uint16_t *scale, const uint8_t *step)
{
// BUG https://code.google.com/p/webm/issues/detail?id=820
int mx = scale_mv(mv->x << !s->ss_h, 0) + (scale_mv(x * 16, 0) & ~15) + (scale_mv(x * 32, 0) & 15);
int my = scale_mv(mv->y << !s->ss_v, 1) + (scale_mv(y * 16, 1) & ~15) + (scale_mv(y * 32, 1) & 15);
#undef scale_mv
int mx, my;
int refbw_m1, refbh_m1;
int th;
if (s->ss_h) {
// BUG https://code.google.com/p/webm/issues/detail?id=820
mx = scale_mv(mv->x, 0) + (scale_mv(x * 16, 0) & ~15) + (scale_mv(x * 32, 0) & 15);
} else {
mx = scale_mv(mv->x << 1, 0) + scale_mv(x * 16, 0);
}
if (s->ss_v) {
// BUG https://code.google.com/p/webm/issues/detail?id=820
my = scale_mv(mv->y, 1) + (scale_mv(y * 16, 1) & ~15) + (scale_mv(y * 32, 1) & 15);
} else {
my = scale_mv(mv->y << 1, 1) + scale_mv(y * 16, 1);
}
#undef scale_mv
y = my >> 4;
x = mx >> 4;
ref_u += y * src_stride_u + x * bytesperpixel;