[wdmaudiodev] Re: How to set a driver's default sampling frequency and num channels
- From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 5 Jul 2012 16:25:45 +0000
Implement KSPROPERTY_PIN_PROPOSEDATAFORMAT / "Get" and Windows 7 will default
to the format your driver prefers.
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Basileios Bu
Sent: Wednesday, July 4, 2012 3:07 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: How to set a driver's default sampling frequency and
num channels
Hello,
Sorry to jump in like this, but I have the same issue with my avstream driver.
I would like to have 4 channel 16 bit 44.1k by default, but so far I've had no
luck. During installation, I monitor my intersection handler with WPP traces,
and the caller data range is always two channels. I'm pretty sure that I
serialized the WAVEFORMATEXTENSIBLE struct correctly, especially as I used the
code from here to do it:
http://msdn.microsoft.com/en-us/library/windows/hardware/ff537752(v=vs.85).aspx
Also, it's strange that the link below says that Windows 7 is required while
the link above says that Windows Vista and higher is required (I tested on
Windows 7 x64, debugger attached):
http://msdn.microsoft.com/en-us/library/windows/desktop/dd316584(v=vs.85).aspx
In any case, I only add the registry values via the INF files (see below for
the extract) to the topology. I have also tried PKEY_AudioEngine_DeviceFormat,
and that fails also. Does anyone have any idea why? Should I add the registry
values anywhere else? I've confirmed that they are added by browsing with
regedit.
I've also tried adding a KSPROPERTY_AUDIO_CHANNEL_CONFIG handler, and always
returning KSAUDIO_SPEAKER_QUAD for a get. Not sure if this is required, though.
Thank you for any help.
(Also tried with PKEY_AudioEngine_DeviceFormat)
[OEMSettingsOverride.AddReg]
HKR,"EP\\0", %PKEY_AudioEndpoint_Association%,,%KSNODETYPE_SPEAKER%
; Should set default to 44.1khz, 4 channel, 16 bits
HKR,"EP\\0", %PKEY_AudioEngine_OEMFormat%, %REG_BINARY%,
41,00,00,00,28,00,00,00,FE,FF,04,00,44,AC,00,00,10,B1,02,00,04,00,10,00,16,00,10,00,33,00,00,00,01,00,00,00,00,00,10,00,80,00,00,AA,00,38,9B,71
On Tue, Jul 3, 2012 at 11:08 PM, Jeff Pages
<barefeet@xxxxxxxxxxxxxx<mailto:barefeet@xxxxxxxxxxxxxx>> wrote:
Hi Paul,
The OEMSettingsOverride.AddReg has to be included in the Topology Interface
sections of the INF, i.e.
[NEW_Device.NTX86.Interfaces]
...
AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_Topology1%,NEW_Device.Interface.Topology1
...
[NEW_Device.Interface.Topology1]
AddReg=NEW_Device.I.Topo1.AddReg, OEMSettingsOverride.AddReg
[NEW_Device.I.Topo1.AddReg]
HKR,,CLSID,,%Proxy.CLSID%
HKR,,FriendlyName,,%NEW_Device.Topology1.szPname%
Also, do you have KSNODETYPE_SPEAKER defined in the Strings section of your INF
file? It should be:
KSNODETYPE_SPEAKER = "{DFF21CE1-F70F-11D0-B917-00A0C9223196}"
Jeff
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>]
On Behalf Of Paul Titchener
Sent: Wednesday, 4 July 2012 12:09 PM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] Re: How to set a driver's default sampling frequency and
num channels
Hi Paul,
For Vista and later platforms, you can use PKEY_AudioEngine_OEMFormat in the
INF file to do this. This is documented in the WDK under Media-Class INF
Extensions
(http://msdn.microsoft.com/en-us/library/windows/hardware/ff537752(v=vs.85).aspx).
Jeff
I'm not having any luck getting this to work.
As described in the link above, I added the section below to the driver's .inf
file:
[OEMSettingsOverride.AddReg]
HKR,"EP\\0", %PKEY_AudioEndpoint_Association%,,%KSNODETYPE_SPEAKER%
; Should set default to 48khz, 2 channel, 16 bits
HKR,"EP\\0", %PKEY_AudioEngine_OEMFormat%, %REG_BINARY%,
41,00,00,00,28,00,00,00,FE,FF,02,00,80,BB,00,00,00,EE,02,00,04,00,10,00,16,00,10,00,03,00,00,00,01,00,00,00,00,00,10,00,80,00,00,AA,00,38,9B,71
I'm calling this added section as shown below:
[NEW_Device.NT]
Include=ks.inf,wdmaudio.inf
Needs=KS.Registration, WDMAUDIO.Registration
CopyFiles=NEW_Device.CopyList
AddReg=NEW_Device.AddReg, OEMSettingsOverride.AddReg
[Strings]
PKEY_AudioEndpoint_Association =
"{1DA5D803-D492-4EDD-8C23-E0C0FFEE7F0E},2"
PKEY_AudioEngine_OEMFormat =
"{E4870E26-3CC5-4CD2-BA46-CA0A9A70ED04},3"
After running the installation, on the Properties files for the driver regedit
doesn't show any lines with the E4870E26-3CC5-4CD2-BA46-CA0A9A70ED04 format key.
But if I use the Sound panel to manually change the sampling frequency, then as
expected the lines with the E48 ... key value show up, holding the binary
format info.
Am I doing something wrong or is there some other trick to get this to work?
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