[wdmaudiodev] Re: Exposing more than 8 channels on Windows 7
- From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 6 Jan 2012 16:12:24 +0000
Are you seeing a KSPROPERTY_TYPE_GET request? What are you returning?
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Neetu Sand
Sent: Friday, January 06, 2012 5:57 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Exposing more than 8 channels on Windows 7
Hi All,
I have a query regarding publishing 16 channels on a speaker device. I specify
channel count as 16 while specifying the datarange in pin factory. In handler
for KSPROPERTY_PIN_PROPOSEDATAFORMAT, I handle condition for 16 channels but
the problem is that the handler for KSPROPERTY_PIN_PROPOSEDATAFORMAT is never
called with 16 channels. It is called within the channel count range of 1-8.
DataRangeIntersection is never called.
Also I notice that for some devices "Advance" tab on Sound and Audio control
panel shows "Channel, Bit Depth and Sample Rate" while for others, it just
shows "Bit Depth and Sample rate". However for later case speaker configuration
is enabled but for the earlier case "configure" button on Sound And audio
control panel is disabled. What change in driver code leads to this behavior of
Sound and Audio Control Panel? I tried removing KSPROPERTY_AUDIO_CHANNEL_CONFIG
from my code but I still see "Configure" button enabled for my device.
I am not sure what change in driver would let Sound and Audio CPL detect 16
channels for my device. Any help is appreciated.
Cheers,
Neetu
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