On Tue, 2005-03-29 at 21:31 +0200, Takashi Iwai wrote:
> 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.
It was not discussed at length.
Anyway, I think you can detect hardware mixing support comparing the
number of substreams to the numebr of streams for a device. If the
ratio is greater than 1, hardware mixing is supported.
Lee
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