On Fri, Dec 11, 2009 at 03:00:29PM +0800, Takashi Iwai wrote: > At Fri, 11 Dec 2009 12:28:36 +0800, > Wu Fengguang wrote: > > > > IbexPeak is the first Intel HDMI audio codec to support channel mapping. > > > > Currently the outstanding problem is, the HDMI channel order do not > > agree with that of ALSA. This patch presents workaround for some > > typical use cases. It gives priority to the typical ALSA surround > > configurations, and defines channel mapping for them. > > This looks good. At least, this can reduce confusions. Thank you. > > We may need better kernel+userspace interactive channel mapping scheme. > > For example, in current scheme if user plays with the surround50 device, > > the kernel is unaware of this and will still select the surround41 > > channel allocation and channel mapping.. > > Yes, more flexible channel mapping is on my TODO list. > I have a half-finished patch series, but need to rebase and brush up. > Let's fix it for 2.6.34. That would be great. The rational I do this patch is, even if we have some user-space channel mapping facility, it still benefits to be able to use the hardware capability -- which helps saving power :) Thanks, Fengguang _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
