MF_SA_D3D_AWARE attribute

Specifies whether a Media Foundation transform (MFT) supports DirectX Video Acceleration (DXVA). This attribute applies only to video MFTs.

Data type

BOOL stored as UINT32

Remarks

To query this attribute, call IMFTransform::GetAttributes to get the global attribute store of the MFT. If GetAttributes succeeds, call IMFAttributes::GetUINT32.

This attribute tells the client whether the MFT can use Direct3D 9 video:

• If the attribute is nonzero, the client can give the MFT a pointer to the IDirect3DDeviceManager9 interface before streaming starts. To do so, the client sends the MFT_MESSAGE_SET_D3D_MANAGER message to the MFT. The client is not required to send this message.
• If this attribute is zero (FALSE), the MFT does not support Direct3D 9 video, and the client should not send the MFT_MESSAGE_SET_D3D_MANAGER message to the MFT.

The default value of this attribute is FALSE. Treat this attribute as read-only. Do not change the value; the MFT will ignore any changes to the value.

For more information about implementing this attribute in a custom MFT, see Direct3D-Aware MFTs.

The GUID constant for this attribute is exported from mfuuid.lib.

Examples

The following code tests whether an MFT supports DXVA.

// Returns TRUE is an MFT supports DirectX Video Acceleration.

BOOL IsTransformD3DAware(IMFTransform *pMFT)
{
    BOOL bD3DAware = FALSE;
    
    IMFAttributes *pAttributes = NULL;

    HRESULT hr = pMFT->GetAttributes(&pAttributes);
    if (SUCCEEDED(hr))
    {
        bD3DAware = MFGetAttributeUINT32(pAttributes, MF_SA_D3D_AWARE, FALSE);
        pAttributes->Release();
    }
    return bD3DAware;
}

Requirements

See also

Alphabetical List of Media Foundation Attributes

Direct3D-Aware MFTs

Supporting DXVA 2.0 in Media Foundation

Media Foundation Transforms

Transform Attributes

IMFAttributes::GetUINT32

IMFAttributes::SetUINT32

MF_TOPOLOGY_DXVA_MODE