[wdmaudiodev] Re: Capture audio from USB Audio Device on XP (SP2)
- From: "Jerry Evans" <jerry@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 13 Feb 2006 13:00:24 -0000
Hi Edwin
I've got DirectKS audio working over a variety of USB devices on Win2k and
WinXP SP1/SP2.
When you create your capture pin what subformat and channelmask do you use?
Jerry
----- Original Message -----
From: "Edwin van den Oosterkamp" <edwin@xxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Monday, February 13, 2006 12:30 PM
Subject: [wdmaudiodev] Capture audio from USB Audio Device on XP (SP2)
Hello,
My application uses Direct KS to access audio interfaces. This works well
for standard (PCI) interfaces and USB interfaces on Win2000. The only
problem I have is capturing on a "USB Audio Device" on Windows XP (SP2). I
can find the correct filter, create a pin and set it to the running state.
It just never produces any data, but I don't get any errors either.
Rendering (on the same USB device on the same system) works fine. Using
the same code on the same system but with a PCI audio interface works fine
as well.
The application prefers stereo 48kHz 16bits. I've tried other settings
(like 44.1kHz) but without result.
I've tried a number of USB audio devices (of different manufacturers) -
all use the same built-in driver and all give the same result.
I've used event-driven I/O as well as synchronous I/O - neither method
produced any audio data.
I've tried WAVEFORMATEX as well as WAVEFORMATEXTENSIBLE (both for PCM
audio) - with no positive result.
So I Googled, searched MSDN and read various forums and mailinglists. I
found a few people with similar problems, but unfortunately without
solutions.
I hope someone on this list will be able to point me in the right
direction to solving this one. Maybe I need to do something additional
while setting up the capturing on USB? Is there a special waveformat I
need to use to capture from USB? Any suggestion will be welcome - the wall
is getting pretty dented here from me banging my head against it and
all...
Best regards,
Ing. Edwin van den Oosterkamp
R&D, MDO UK
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