Re: [Openvortex-dev] CVS updated. Lets your kernels crash :)

[Manuel Jander]

Hi folks,

I forgot (again) to say, that i added generic 4 speaker support. Well,
this has not to be like this in a definite way, but at least it works on
the MX300.

The 4 speaker routing in the current CVS driver is done in the ADB
mixer. That means that if the codec support 4 channels, a stereo stream
is split up into a quad stream and feed into the 4 channel codec. If the
PCM audio is mono, its also split up into 4 streams. If it is a quad PCM
stream, well, each channel is just fed into its codec channel.

The previous driver did the stereo to quad expansion on the codec. This
solution is better in my opinion, because it supports other analog
sources too (like CDROm audio), but unfortunately it doesnt seme to
work. The binary driver uses the former alternative, but i would prefer
the latter if its posible to make it work consistently.

Best Regards

Manuel Jander




On Fri, 20 03-08-08 at 15:00, J. Gordon Wolfe wrote:
> Oh, and hey, I was just messing around with the mixer, and I guess the
> surround slider works now!  I've got my ac97 module patched to get
> 4-speaker support from the stac codec, but now I can turn it off and use
> the slider instead.  There's some weirdness though.  For instance, when
> XMMS switches tracks (i.e. opens a new substream), I lose control of the
> surround speakers with the slider.  This is with the 4-speaker switch
> off.  If I toggle the stac 4-speaker switch on then off again, I regain
> control with the slider, but only until a new substream is played, i.e.
> if anything uses the PCM I have to toggle/untoggle again before the
> slider will have any effect.  Also with the stac 4-speaker switch
> toggled off, I don't think the EQ has any effect on the rear channels. 
> Maybe I should unpatch ac97 and see what that does...
> 
>  - Gordon