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IVMRMixerControl9::GetProcAmpControl

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Microsoft DirectShow 9.0

IVMRMixerControl9::GetProcAmpControl

The GetProcAmpControl method retrieves the current image adjustment settings for the VMR-9. Image adjustment includes brightness, contrast, hue, and saturation, and is performed by the graphics device. If the graphics driver does not support hardware image adjustment, this method fails.

Syntax

  HRESULT GetProcAmpControl(
  DWORD  dwStreamID,
  VMR9ProcAmpControl*  lpClrControl
);

Parameters

dwStreamID

[in]  Specifies the input stream. This value corresponds to the input pin. For example, the first input pin is stream 0.

pRect

[in, out]  Pointer to a VMR9ProcAmpControl structure that receives the image adjustment settings. When the method returns, the dwFlags field indicates which properties are supported by the graphics driver. Set the dwSize member in the structure before calling this method.

Return Values

The method returns an HRESULT. Possible values include those in the following table.

Value Description
E_INVALIDARG Invalid argument. Possible causes of this error include:
  • The stream number is invalid
  • The value of dwSize in the VMR9ProcAmpControl structure is invalid.
E_POINTER NULL pointer argument.
S_OK Success.
VFW_E_NOT_CONNECTED The pin is not connected.
VFW_E_VMR_NO_PROCAMP_HW The graphics hardware does not support ProcAmp controls.

Requirements

Header: Include D3d9.h, Vmr9.h.

Library: Use Strmiids.lib.

See Also