[wdmaudiodev] Re: Anyone tried using DRV_QUERYDEVICEINTERFACE[SIZE]?
- From: "Frank Yerrace" <frankye@xxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 21 Oct 2003 16:35:40 -0700
You should send this message to a device ID instead of a device handle.
Frank Yerrace
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no
rights.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Daniel E. Germann
Sent: Tuesday, October 21, 2003 4:29 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Anyone tried using
DRV_QUERYDEVICEINTERFACE[SIZE]?
Has anyone tried sending the DRV_QUERYDEVICEINTERFACESIZE message to a
wave
device? I tried using it (and its companion, DRV_QUERYDEVICEINTERFACE)
on
two Windows XP systems (one "Gold", one SP1), and they both seem to
return
MMSYSERR_NOTSUPPORTED (8). Both devices queried used WDM Audio drivers;
one
driver was signed and one driver was not signed. I tried both wave in
and
wave out devices.
Any ideas? A fragment from my test program is pasted below. I am
probably
missing something obvious.
Best regards,
-Dan
void CTestDlg::QueryDevice(int dev)
{
CString str;
HWAVEIN hwi;
MMRESULT ret;
ULONG ulSize;
WAVEFORMATEXTENSIBLE wfx;
WCHAR uszDevInterface[512];
memset(&wfx, 0, sizeof(wfx));
wfx.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
wfx.Format.nChannels = 2;
wfx.Format.nSamplesPerSec = 44100;
wfx.Format.wBitsPerSample = 16;
wfx.Format.nBlockAlign = wfx.Format.wBitsPerSample / 8 *
wfx.Format.nChannels;
wfx.Format.nAvgBytesPerSec = wfx.Format.nSamplesPerSec *
wfx.Format.nBlockAlign;
wfx.Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) -
sizeof(WAVEFORMATEX);
wfx.Samples.wValidBitsPerSample = wfx.Format.wBitsPerSample;
wfx.dwChannelMask = 0;
wfx.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
ret = waveInOpen(&hwi, dev, (WAVEFORMATEX *) &wfx, 0, 0,
CALLBACK_NULL);
if (ret == MMSYSERR_NOERROR)
{
ulSize = 0;
ret = waveInMessage(hwi, DRV_QUERYDEVICEINTERFACESIZE, (DWORD)
&ulSize, 0);
// above call fails with MMSYSERR_NOTSUPPORTED
if (ret == MMSYSERR_NOERROR)
{
if (ulSize < sizeof(uszDevInterface))
{
ret = waveInMessage(hwi, DRV_QUERYDEVICEINTERFACE,
(DWORD)
uszDevInterface, sizeof(uszDevInterface));
// above call fails with MMSYSERR_NOTSUPPORTED
if (ret == MMSYSERR_NOERROR)
{
str.Format("Interface: %ls", uszDevInterface);
AfxMessageBox(str);
}
}
}
waveInClose(hwi);
}
}
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