[wdmaudiodev] Re: Capture audio from USB Audio Device on XP (SP2)
- From: "Edwin van den Oosterkamp" <edwin@xxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 14 Feb 2006 12:27:11 -0000
Hello Jerry,
Thank you for your reply.
This is what I am currently using in my code:
WAVEFORMATEX wfx;
memset( &wfx, 0, sizeof( WAVEFORMATEX ) );
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nChannels = m_CardNumChannels;
wfx.nSamplesPerSec = m_CardSamplerate;
wfx.nBlockAlign = wfx.nChannels * 2;
wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
wfx.wBitsPerSample = 16;
Where m_CardNumChannels has been 1 and 2 and m_CardSamplerate has been 48000
and 44100.
I've also tried the following:
WAVEFORMATEXTENSIBLE wfx;
wfx.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
wfx.Format.nChannels = 2;
wfx.Format.nSamplesPerSec = m_CardSamplerate;
wfx.Format.nBlockAlign = 4;
wfx.Format.nAvgBytesPerSec = wfx.Format.nSamplesPerSec *
wfx.Format.nBlockAlign;
wfx.Format.wBitsPerSample = 16;
wfx.Format.cbSize =
sizeof(WAVEFORMATEXTENSIBLE)-sizeof(WAVEFORMATEX);
wfx.Samples.wValidBitsPerSample = 16;
wfx.dwChannelMask = KSAUDIO_SPEAKER_STEREO;
wfx.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
Without much luck unfortunately... Did not try this one in mono to be honest.
What are the settings you recommend?
Best regards,
Ing. Edwin van den Oosterkamp
R&D, MDO UK
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
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