[alsa-devel] dma buffer format

[Takashi Iwai]

At Mon, 16 Feb 2009 16:57:10 -0600,
York Sun wrote:
> 
> On Mon, 2009-02-16 at 23:26 +0100, Takashi Iwai wrote:
> > At Mon, 16 Feb 2009 16:21:59 -0600,
> > York Sun wrote:
> > > 
> > > Takashi,
> > > 
> > > I am now working on a surround sound driver for the first time. I am
> > > confused by the packed format of dma buffer. If the channel number is 6,
> > > is the buffer filled with data as
> > > 
> > > front left, front right, rear left, rear right, center, LFE
> > > 
> > > or
> > > 
> > > front left, rear left, center, front right, rear left, LFE?
> > 
> > It's supposed to be FL/FR/RL/RR/C/LFE.
> > That's so to be consitent with 4 channels (just cut the last two
> > channels).
> > 
> Thanks for the quick reply. I am curious if it is the only format
> supported, or can it be customized?

As of now, it's fixed.  API to inform / change the channel mapping
is under consideration...


Takashi