On Tuesday 29 November 2005 15:18, Bryan Mayland wrote:
> Bryan Mayland wrote:
> > I upgraded from tags/0.4.0 to branches/0.4 and the recording
> > volume on my 2 cards (PVR-150, PVR-250 both ntsc) is definitely
> > lower at the same -y volume= setting as before. I haven't tracked
> > the problem down yet (I will tonight), but I wanted to check in to
> > see if anyone else has noticed similar behavior.
>
> My bad. After recording the same thing at the same -y volume on
> both cards simultaneously, I see that I was wrong. The PVR-150 has
> the correct volume, the PVR-250 has a lowered volume.
>
> This is due to r2954 changing the volume scaling in the msp3400.
> I don't think this change is a good thing. Sure, you can crank up
> the volume to the point it becomes clipped and overblown, but the
> driver shouldn't rescale the volume range to keep you out of an area
> where you /might/ encounter that condition.
>
> This also doesn't jive with the volume rescale code I put in the
> cx25840-audio unit, since both are based on quantizing the passed
> volume to the range specified by the msp3400 datasheet, not the
> arbitrary limit imposed by clipping 10% off the volume in the driver.
>
> In any case, the msp3400 change causes me to have to crank my
> volume to 65535 to get the same volume I used to get in 0.4.0.
I've mailed the v4l list to see if this code from msp3400.c can be
removed. I agree, it doesn't belong there at all. Until the driver is
changed in v4l I keep it as it is now. The v4l driver and the one in
ivtv-0.4 should remain synchronized.
Hans
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