IDirectSound::GetCaps

The IDirectSound::GetCaps method retrieves the capabilities of the hardware device that is represented by the DirectSound object.

HRESULT GetCaps(
  LPDSCAPS lpDSCaps  
);

Parameters

lpDSCaps

Address of the DSCAPS structure to contain the capabilities of this sound device.

Return Values

If the method succeeds, the return value is DS_OK.

If the method fails, the return value may be one of the following error values:

Remarks

Information retrieved in the DSCAPS structure describes the maximum capabilities of the sound device and those currently available, such as the number of hardware mixing channels and the amount of on-board sound memory. You can use this information to fine-tune performance and optimize resource allocation.

Because of resource-sharing requirements, the maximum capabilities in one area might be available only at the cost of another area. For example, the maximum number of hardware-mixed streaming sound buffers might be available only if there are no hardware static sound buffers.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dsound.h.
  Import Library: Use dsound.lib.

See Also

DirectSoundCreate