IWMResamplerProps::SetUserChannelMtx Method
Specifies the channel matrix.
Syntax
HRESULT SetUserChannelMtx(
[in] ChMtxType *userChannelMtx
);
Parameters
- userChannelMtx [in]
Pointer to an array of floating-point values that represents a channel conversion matrix.
Return Value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
| S_OK | The method succeeded. |
Remarks
This method is equivalent to setting the MFPKEY_WMRESAMP_CHANNELMTX property, except that the matrix is represented differently:
- Values are floating point.
- The matrix is transposed.
To convert from the integer values given in the MFPKEY_WMRESAMP_CHANNELMTX property to floating-point values, use the following formula:
(float)pow(10.0,((double)Coeff)/(65536.0*20.0))
where Coeff is an integer coefficient.
Requirements
Minimum supported client |
Windows XP |
Minimum supported server |
Windows Server 2003 |
Header |
Wmcodecdsp.h |
See Also
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Build date: 4/7/2010