Re: Play-through Support
Re: Play-through Support
- Subject: Re: Play-through Support
- From: William Stewart <email@hidden>
- Date: Mon, 21 Mar 2005 18:46:26 -0800
Yes - we have this in our list to do that
Bill
On 21/03/2005, at 6:43 PM, B.J. Buchalter wrote:
Jeff,
Unfortunately, to my knowledge there aren't any drivers out there
that support
the newer monitor path controls. The best you are going to find
are ones that
support the monitor on/off control (aka
kAudioDevicePropertyPlayThru).
The kAudioDevicePropertyPlayThruDestination family of properties
are there to
allow for a modest amount of routing, much like
kAudioDevicePropertyDataSource. The tacit assumption is that each
monitor
channel corresponds to each input channel. Thus,
the kAudioDevicePropertyDataSource controls where the data comes
from for the
input channel and kAudioDevicePropertyPlayThruDestination controls
where the
data goes along the monitor pathway.
I am ready to implement this stuff for the Mobile I/O, but I have
nothing to
test it against, and we need a test case to ensure that we don't have
panic'ing code paths in the kernel extension. On top of that, I am not
really clear on how the routing controls are intended to be exposed
and
implemented.
Is there any way you guys could write up small sample that would
exercise
the DM properties on a driver as you expect them to work, and
document what
properties are expected where -- even if it is in a totally arbitrary
virtual driver like the phantom audio driver?
It would be really great to break this logjam; I think that it is
going to
require a bit more from the CA team to get things going...
Best regards,
B.J. Buchalter
Metric Halo
5 Donovan Drive
Hopewell Junction, NY 12533 USA
tel +1 845 223-6112
fax +1 603 250-2451
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