[MPlayer-dev-eng] [PATCH] tv color controls

[Alban Bedel]

Hi,

currently the tv color controls can't be really used interactivly. Their is
some commands to change them but they are not bound by default, and it is
imho a bit awkward to have 2 different set of controls.

So here is my take at the problem. This patch first add a function to the
tv api to query the current color settings and fix tv_set_colors_options()
to give a correct return value (and not success in all case).

Then it fix the v4l input to avoid rounding problems when converting from
the internal v4l range (0/65535) to mplayer's range (-100/100). Currently
the v4l driver use a 2nd order polynomial to convert the contrast value,
that seems totaly useless and it would make the back conversion a pain.
So i changed it to use the same linear approximation as all the other color
controls.

Finnaly it add the needed code to the color control property and a bunch of
options to control the behaviour. -notv-colors disable the whole thing
giving the old behaviour. -notv-contrast, -notv-hue, etc disable single
controls, this can be needed if the card/driver is buggy or too
limited (like v4l who can't report that it doesn't support a specific
control).

	Albeu
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