[wdmaudiodev] Re: [EXTERNAL] Problem with Friendly Names in Audio Driver

  • From: Jamie Finch <jfi@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Tue, 4 Jan 2022 12:12:05 -0800

I am trying to use the friendly name in the popup to select the audio channel.
A picture will really help.  This is a picture from Microsoft Teams.

Where it says "Line (NDI Webcam Audio)", which is the name of the description:

HKR,Drivers\wave\wdmaud.drv,Description,,%NewTek_AudioPortClass_Multi.Description%
HKR,Drivers\mixer\wdmaud.drv,Description,,%NewTek_AudioPortClass_Multi.Description%

I need the channel selection text.
The goal is to have it say:

"NDI Webcam Audio 1"
"NDI Webcam Audio 2"
"NDI Webcam Audio 3"
"NDI Webcam Audio 4"

Can anyone direct me to an example of how to do this?
For our video driver, it uses the Friendly Name exactly as I need it.

The sample code I used is from Windows-driver-samples-master/audio/SimpleAudioSample.
I am not in control of the application we are running in, could be Skype, Teams, Google Hangout...

Jamie Finch


On 12/22/2021 9:46 AM, Matthew van Eerde (Matthew.van.Eerde) wrote:
Caution: External email

Here's a sample that shows how to enumerate all kinds of devices:

https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fmicrosoft%2FWindows-universal-samples%2Ftree%2Fmain%2FSamples%2FDeviceEnumerationAndPairing&amp;data=04%7C01%7Cjfinch%40newtek.com%7C8e05d4d228ce42336a1d08d9c572fc6e%7Cc63c3ba740db460ebdf1e63a02a3ad59%7C0%7C0%7C637757919921320038%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=KNYcXH9e8oKYpgvjq%2B%2FnqgHyXTWjj5zJndiPWH20JSg%3D&amp;reserved=0

To enumerate audio devices, use one of the selectors from the Windows.Media.Device.MediaDevice class

https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fuwp%2Fapi%2Fwindows.media.devices.mediadevice%3Fview%3Dwinrt-22000&amp;data=04%7C01%7Cjfinch%40newtek.com%7C8e05d4d228ce42336a1d08d9c572fc6e%7Cc63c3ba740db460ebdf1e63a02a3ad59%7C0%7C0%7C637757919921320038%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=FkOXrz8B9V0Wad8vlIkyPUc0VGoRZtK%2BibJ%2B9SNv9dE%3D&amp;reserved=0

-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> On Behalf Of Jamie Finch
Sent: Monday, December 20, 2021 10:49 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [EXTERNAL] [wdmaudiodev] Problem with Friendly Names in Audio Driver

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We have a video and audio software only drivers we use to send data from our main application to Skype, Teams, VLC, Zoom, Google Hangout.... ect.

We have channels set up so that the source from our application can be different.
Presently the channels can be from 0 to 3.  Set by a data item when you send the IOCTL.

The video driver has a FriendlyName section that works as expected.
In the applicatons the selection for the video will be Video #1 to Video #4, the FriendlyNames.

The desired affect in the application popups for the microphone is:
Audio #1, Audio #2, Audio #3, Audio #4.

This article indicates we can do the same thing for the audio.
https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fwindows-hardware%2Fdrivers%2Faudio%2Fmultiple-audio-subdevices&amp;data=04%7C01%7Cjfinch%40newtek.com%7C8e05d4d228ce42336a1d08d9c572fc6e%7Cc63c3ba740db460ebdf1e63a02a3ad59%7C0%7C0%7C637757919921320038%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=NKRUgmKSEUY3N1mBiwZwTzCOUINf%2B6M5WFcGesSF%2Btc%3D&amp;reserved=0
What we see instead of the FriendlyNames, is the device name.

When we call InstallSubdevice() we are using sting constants, so we cannot be tripping the bug that it only remembers the address, reported on your forums.
static wchar_t* szNameWave[4]     = { L"Wave_0", L"Wave_1",
L"Wave_2",     L"Wave_3"     };
static wchar_t* szNameTopology[4] = { L"Topology_0", L"Topology_1", L"Topology_2", L"Topology_3" };

We have as expected, interface sections in the INF file that look like:

[NewTek_AudioPortClass.NT$ARCH$.Interfaces]
AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_Wave0%,NewTek_AudioPortClass.AddInterfaceSection.Aud0
AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_Wave1%,NewTek_AudioPortClass.AddInterfaceSection.Aud1
AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_Wave2%,NewTek_AudioPortClass.AddInterfaceSection.Aud2
AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_Wave3%,NewTek_AudioPortClass.AddInterfaceSection.Aud3
ect....

[NewTek_AudioPortClass.AddInterfaceSection.Aud0]
AddReg=NewTek_AudioPortClass.AddInterfaceSection.Aud0.AddReg
[NewTek_AudioPortClass.AddInterfaceSection.Aud0.AddReg]
HKR,,CLSID,,%Proxy.CLSID%
HKR,,FriendlyName,,%NewTek_AudioPortClass.Aud0.FriendlyName%
ect...

I have been looking at the DDK audio samples and they have FriendlyNames, but the device name seems to show up instead of them.
In the DDK SimpleAudioSample, it has a FriendlyName of "Simple Audio Sample Wave Microphone Array - Front", but what I see in the Zoom popup is "Virutal Audio Device (WDM) - Simple Audio Sample".

Can you point me to an audio example, where the FriendlyName is used when selecting the device?
Also is there another method that I can accomplish the same thing?
It appears I am missing something.


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