Decoding performance issue

Hi guys,

I am working on Hardware decoding, the decoder gets initialized fine with MFX_IMPL_HARDWARE2|MFX_IMPL_VIA_D3D9 and i am using vpp for the colourspace conversion NV12->RGB4. My system configuration is i7-2600k and I am using 2013 R2 SDK. Everything is working fine except for the CPU usage which is about 32% throughout the decoding process and i am decoding @25fps 1920*1080.

Here is how i am setting up the VPP structure

    m_VPPParams.vpp.In.FourCC = MFX_FOURCC_NV12;

    m_VPPParams.vpp.In.ChromaFormat = MFX_CHROMAFORMAT_YUV420;

    m_VPPParams.vpp.In.CropX = 0;

    m_VPPParams.vpp.In.CropY = 0;

    m_VPPParams.vpp.In.CropW = 1920;

    m_VPPParams.vpp.In.CropH = 1080;

    m_VPPParams.vpp.In.PicStruct = MFX_PICSTRUCT_FIELD_TFF;

    m_VPPParams.vpp.In.FrameRateExtN = 240000;

    m_VPPParams.vpp.In.FrameRateExtD = 9600;

    // width must be a multiple of 16

    // height must be a multiple of 16 in case of frame picture and a multiple of 32 in case of field picture

    m_VPPParams.vpp.In.Width = MSDK_ALIGN16(m_VPPParams.vpp.In.CropW);

    m_VPPParams.vpp.In.Height =

        (MFX_PICSTRUCT_PROGRESSIVE == m_VPPParams.vpp.In.PicStruct) ?

        MSDK_ALIGN16(m_VPPParams.vpp.In.CropH) :

        MSDK_ALIGN32(m_VPPParams.vpp.In.CropH);

    // Output data

    m_VPPParams.vpp.Out.FourCC = MFX_FOURCC_RGB4;

    m_VPPParams.vpp.Out.ChromaFormat = MFX_CHROMAFORMAT_YUV420;

    m_VPPParams.vpp.Out.CropX = 0;

    m_VPPParams.vpp.Out.CropY = 0;

    m_VPPParams.vpp.Out.CropW = m_VPPParams.vpp.In.CropW ;   

    m_VPPParams.vpp.Out.CropH = m_VPPParams.vpp.In.CropH ;

    m_VPPParams.vpp.Out.PicStruct = MFX_PICSTRUCT_FIELD_TFF;

    m_VPPParams.vpp.Out.FrameRateExtN = 240000;

    m_VPPParams.vpp.Out.FrameRateExtD = 9600;

    m_VPPParams.vpp.Out.Width = MSDK_ALIGN16(m_VPPParams.vpp.Out.CropW);

    m_VPPParams.vpp.Out.Height =(MFX_PICSTRUCT_PROGRESSIVE == m_VPPParams.vpp.Out.PicStruct) ?

                                    MSDK_ALIGN16(m_VPPParams.vpp.Out.CropH) :

                                    MSDK_ALIGN32(m_VPPParams.vpp.Out.CropH);

    m_VPPParams.IOPattern = MFX_IOPATTERN_IN_SYSTEM_MEMORY | MFX_IOPATTERN_OUT_SYSTEM_MEMORY;

    m_VPPParams.AsyncDepth = 1;