IVPConfig::IsVPDecimationAllowed (Windows CE 5.0)
This method determines if scaling at the video port is possible.
HRESULT IsVPDecimationAllowed(LPBOOLpbIsDecimationAllowed);
Parameters
- pbIsDecimationAllowed
[out] Pointer to TRUE if decimation is allowed, and to FALSE otherwise.
Return Values
Returns an HRESULT value that depends on the implementation of the interface.
HRESULT can include one of the following, or other values not listed.
| Value | Description |
|---|---|
| E_FAIL | Failure. |
| E_POINTER | NULL pointer argument. |
| E_INVALIDARG | Invalid argument. |
| E_NOTIMPL | Not implemented. |
| NOERROR | No error. |
Remarks
The Overlay Mixer filter uses this function to determine whether the driver needs the mixer to decimate video data at its own discretion.
This function can be especially useful in a capture with preview situation in which you would not want the VP mixer filter to perform any scaling at the video port.
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements.
For more information, see Setting Up the Build Environment.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
See Also
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