private int MacroBlockAnalysis(int width, int height, Vp8EncIterator it, Span <byte> y, Span <byte> u, Span <byte> v, int yStride, int uvStride, int[] alphas, out int uvAlpha)
{
int alpha = 0;
uvAlpha = 0;
if (!it.IsDone())
{
do
{
it.Import(y, u, v, yStride, uvStride, width, height, true);
int bestAlpha = this.MbAnalyze(it, alphas, out int bestUvAlpha);
// Accumulate for later complexity analysis.
alpha += bestAlpha;
uvAlpha += bestUvAlpha;
}while (it.Next());
}
return(alpha);
}