[wdmaudiodev] Re: How to set a driver's default sampling frequency and num channels
- From: Basileios Bu <basileiosbu@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 4 Jul 2012 18:06:54 -0400
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> 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] *On Behalf Of *Paul Titchener
> *Sent:* Wednesday, 4 July 2012 12:09 PM
> *To:* 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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