At Tue, 29 Mar 2005 14:05:08 -0500, Lee Revell wrote: > > On Tue, 2005-03-29 at 21:04 +1000, Benjamin Herrenschmidt wrote: > > Can the driver advertize in some way what it can do ? depending on the > > machine we are running on, it will or will not be able to do HW volume > > control... You probably don't want to use softvol in the former case... > > > > dmix by default would be nice though :) > > No, there's still no way to ask the driver whether hardware mixing is > supported yet. It's come up on alsa-devel before. Patches are welcome.
Well I don't remember the discussion thread on alsa-devel about this, but it's a good idea that alsa-lib checks the capability of hw-mixing and apples dmix only if necessary. (In the case of softvol, it can check the existence of hw control by itself, though.) Currently, dmix is enabled per driver-type base. That is, dmix is set to default in each driver's configuration which is known to have no hw mixing functionality. > dmix by default would not be nice as users who have sound cards that can > do hardware mixing would be annoyed. However, in the upcoming 1.0.9 > release softvol will be used by default for all the mobo chipsets. On 1.0.9, dmix will be default, too, for most of mobo drivers. Takashi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
