[alsa-devel] ALSA patch Nvidia 8 channel hdmi audio

[Takashi Iwai]

At Fri, 5 Jun 2009 12:28:29 +0800,
Wu Fengguang wrote:
> 
> On Thu, Jun 04, 2009 at 08:29:25AM +0200, Takashi Iwai wrote:
> > At Thu, 4 Jun 2009 14:05:52 +0800,
> > Wei Ni wrote:
> > > 
> > > Yes, my test wav file is from Windows.
> > > 
> > > I had used different player to test with my test wav file.
> > > The mplayer has no mapping problem, but other players map channels
> > > wrong.
> > > As you said, it seems that is caused by the difference of the ALSA and
> > > Windows.
> > 
> > I guess mplayer corrects the channel mapping automatically.
> > 
> > > Unfortunately, our nvidia codec doesn't support channel-slot assignment
> > > yet.
> > 
> > OK.
> > 
> > > How could we fix this problems, do you have any suggestions?
> > 
> > It's a bit difficult issue right now.  Usually we could "fix" the
> > channel mapping in alsa-lib configuration.  But, HD-audio has currently
> > a single alsa-lib configuration, and others may use the right channel
> > mapping.
> > 
> > I don't remember how is the case of Intel HDMI...  Can anyone check?
> 
> The codecs I tested - G35/G45/GM45 - does not support the channel-slot
> assignment. I guess future hardwares may support that.

OK, and the channel assignment is also FL/FR/C/LFE/RL/RR, right?


thanks,

Takashi