IDirectSoundCaptureBuffer::GetFormat

The IDirectSoundCaptureBuffer::GetFormat method retrieves the current format of the sound capture buffer.

HRESULT IDirectSoundCaptureBufferGetFormat(

LPWAVEFORMATEX lpwfxFormat,

DWORD dwSizeAllocated,

LPDWORD lpdwSizeWritten

);

Parameters
lpwfxFormat
Address of the WAVEFORMATEX variable to contain a description of the sound data in the capture buffer. To retrieve the buffer size needed to contain the format description, specify NULL. In this case the DWORD pointed to by the lpdwSizeWritten parameter will receive the size of the structure needed to receive complete format information.
dwSizeAllocated
Size, in bytes, of the WAVEFORMATEX structure. DirectSoundCapture writes, at most, dwSizeAllocated bytes to the structure; if the structure requires more memory, it is truncated.
lpdwSizeWritten
Address of a variable to receive the number of bytes written to the WAVEFORMATEX structure. This parameter can be NULL.
Return Values

If the method succeeds, the return value is DS_OK.

If the method fails, the return value may be DSERR_INVALIDPARAM.