IWMResamplerProps::SetUserChannelMtx

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Specifies the channel matrix.

Syntax

HRESULT SetUserChannelMtx(ChMtxType*userChannelMtx);

Parameters

userChannelMtx

[in]  Pointer to an array of floating-point values that represents a channel conversion matrix.

Return Values

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

Client: Requires Windows Vista or Windows XP.

Header: Include wmcodecdsp.h.

See Also