IVMRMixerControl9::GetProcAmpControlRange method (vmr9.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The GetProcAmpControlRange method retrieves the range of values for an image adjustment setting, such as brightness, contrast, hue, or saturation. Image adjustment is performed by the graphics device, so the valid range depends on the graphics driver. If the driver does not support hardware image adjustment, this method fails.
Syntax
HRESULT GetProcAmpControlRange(
[in] DWORD dwStreamID,
[in, out] VMR9ProcAmpControlRange *lpClrControl
);
Parameters
[in] dwStreamID
Specifies the input stream. This value corresponds to the input pin. For example, the first input pin is stream 0.
[in, out] lpClrControl
Pointer to a VMR9ProcAmpControlRange structure that receives the range. The caller must set the dwSize and dwProperty fields.
Return value
The method returns an HRESULT. Possible values include those in the following table.
| Return code | Description |
|---|---|
|
Invalid argument. Possible causes of this error include:
|
|
NULL pointer argument. |
|
Success. |
|
The pin is not connected. |
|
The graphics hardware does not support ProcAmp controls. |
Remarks
Include DShow.h and D3d9.h before Vmr9.h.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP with SP2 [desktop apps only] |
| Minimum supported server | Windows Server 2003 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | vmr9.h |
| Library | Strmiids.lib |