[MPlayer-dev-eng] [PATCH] pc2tv/tv2pc conversion

[Nico Sabbi]

This patch extends vf_yuvcsp.c to rescale luma and chroma when
converting from tv->pc and viceversa.

Now the filter accepts an optional parameter which can be "pc2tv",
"tv2pc" or "clamp" (the default, old algorithm).

It's implemented as a LUT for performance reasons.

As far as I understand how CCIR601 works, this code seems to be correct,
but I wish someone more familiar with colorspace conversions will give 
it a look.

I also attached the source of the program that I wrote to convert the
values between the two color spaces, so checking is easier.

Thanks,
	Nico
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