When RDOQ_CHROMA_LAMBDA macro is enabled, the chroma channels may have a different lambda weighting from the luma during RDOQ.

However, in TEncSlice.cpp, lines 353, 470, 574, 685, 741, the calls to setLambda use the lambda for Luminance and the lambda for Cr. This will cause reduced performance when Cr's QP offset is different from Cb's QP offset.

Should setLambda therefore take 3 lambda values - Y, Cb and Cr, and calls to selectLambda in TEncSearch pass in TEXT_CHROMA_U and TEXT_CHROMA_V instead of TEXT_CHROMA?

There's a similar issue with SAO, but the changes required are less trivial.

(Identified during RExt development.)