public int GetCostLuma16(Vp8ModeScore rd, Vp8EncProba proba, Vp8Residual res)
{
int r = 0;
// re-import the non-zero context.
this.NzToBytes();
// DC
res.Init(0, 1, proba);
res.SetCoeffs(rd.YDcLevels);
r += res.GetResidualCost(this.TopNz[8] + this.LeftNz[8]);
// AC
res.Init(1, 0, proba);
for (int y = 0; y < 4; y++)
{
for (int x = 0; x < 4; x++)
{
int ctx = this.TopNz[x] + this.LeftNz[y];
res.SetCoeffs(rd.YAcLevels.AsSpan((x + (y * 4)) * 16, 16));
r += res.GetResidualCost(ctx);
this.TopNz[x] = this.LeftNz[y] = res.Last >= 0 ? 1 : 0;
}
}
return(r);
}
public int GetCostLuma4(Span <short> levels, Vp8EncProba proba, Vp8Residual res)
{
int x = this.I4 & 3;
int y = this.I4 >> 2;
int r = 0;
res.Init(0, 3, proba);
int ctx = this.TopNz[x] + this.LeftNz[y];
res.SetCoeffs(levels);
r += res.GetResidualCost(ctx);
return(r);
}
public int GetCostUv(Vp8ModeScore rd, Vp8EncProba proba, Vp8Residual res)
{
int r = 0;
// re-import the non-zero context.
this.NzToBytes();
res.Init(0, 2, proba);
for (int ch = 0; ch <= 2; ch += 2)
{
for (int y = 0; y < 2; y++)
{
for (int x = 0; x < 2; x++)
{
int ctx = this.TopNz[4 + ch + x] + this.LeftNz[4 + ch + y];
res.SetCoeffs(rd.UvLevels.AsSpan(((ch * 2) + x + (y * 2)) * 16, 16));
r += res.GetResidualCost(ctx);
this.TopNz[4 + ch + x] = this.LeftNz[4 + ch + y] = res.Last >= 0 ? 1 : 0;
}
}
}
return(r);
}