[wdmaudiodev] Re: Does DRV_QUERYDEVICEINTERFACE work?
- From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 13 Nov 2003 16:44:06 +1100
If I may answer my own question, I've just got it to work by using a DeviceID
number instead of a handle for the hwi parameter in waveInMessage. This in
spite of the SDK documentation for waveInMessage saying that hwi is a "handle
to the waveform-audio input device" and the DDK documentation saying it should
work with either. Agh!!
Jeff
----- Original Message -----
From: Jeff Pages
To: wdmaudiodev@xxxxxxxxxxxxx
Sent: Thursday, November 13, 2003 4:29 PM
Subject: [wdmaudiodev] Does DRV_QUERYDEVICEINTERFACE work?
I'm trying to use DRV_QUERYDEVICEINTERFACESIZE and DRV_QUERYDEVICEINTERFACE
in a call to waveInMessage, as per the documentation in the current DDK under
"Obtaining a Device Interface Name", but waveInMessage returns
MMSYSERR_NOTSUPPORTED. This happens on both Windows 2000 (SP4) and Windows XP
(SP1).
Has anyone managed to get these calls to work?
Jeff Pages
Innes Corporation Pty Ltd
----- Original Message -----
From: wade
To: wdmaudiodev@xxxxxxxxxxxxx
Sent: Thursday, November 13, 2003 5:48 AM
Subject: [wdmaudiodev] Blocky looking metering in SoundForge
I have written an AVStreams capture driver.
I am experiencing a clunky, blocky display in audio applications that
provide visual metering of the audio signal. Upon closer inspection, in
Soundforge, If I set the "Status Format" to "samples", and record, the "time
recorded" field on the record window increments by ~12k samples (48kBytes).
Other audio cards increment by MUCH smaller amounts. I notice that
12k*2channels*2bytes is about one AVSream queue's worth of data (6 * 8192k
frames).
I am KsEditing the Allocator structure to allow selection of frame size,
but in this instance, 6, 8k frames were alloc'd.
I am completing the frames with the following code:
.... transfer the data to the StreamPointerBuffer
StreamPointer -> StreamHeader -> DataUsed += TransferSize;
Pin->audioPosition.WriteOffset += TransferSize;
// Now figure the duration
StreamPointer -> StreamHeader ->OptionsFlags =
(KSSTREAM_HEADER_OPTIONSF_DURATIONVALID);
StreamPointer -> StreamHeader->PresentationTime.Numerator =
Pin->kstimeNumer;
StreamPointer -> StreamHeader->PresentationTime.Denominator =
Pin->kstimeDenom;
StreamPointer -> StreamHeader->Duration = (TransferSize);
if (STATUS_DEVICE_NOT_READY == (status=KsStreamPointerAdvanceOffsets
(StreamPointer,0,StreamPointer->OffsetOut.Remaining,FALSE)))
{
status = STATUS_PENDING;
}
else
{
status = STATUS_SUCCESS;
// KsStreamPointerUnlock(StreamPointer,FALSE/*(!Pin->streamRunning)*/);
}
.
.
.
break;
return status;
Any ideas?
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