int encoder_x264_init(Encoder_t *encoder, Image_t *image) {
    encoder->sps_data = NULL;
    encoder->sps_data_size = 0;
    encoder->pps_data = NULL;
    encoder->pps_data_size = 0;
    encoder->hwenc.sts = MFX_ERR_NONE;
    const mfxIMPL hwimpl[] = {MFX_IMPL_HARDWARE_ANY, MFX_IMPL_HARDWARE};;
    mfxVersion vers = {
                        .Minor = 0,
                        .Major = 1}; //Legacy support
    mfxU16 target_width = (image->width > 1920 ? 1920 : image->width);
    mfxU16 target_height = (image->height > 1080 ? 1080 : image->height);

    //Initialization of Intel Media SDK ENCODER session
    for(int i=0; i < sizeof(hwimpl)/sizeof(hwimpl[0]);i++)
    {
        encoder->hwenc.sts = MFXInit(hwimpl[i], &vers, &encoder->hwenc.ENCses);
        MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);
        if(encoder->hwenc.sts == MFX_ERR_NONE)
        {
            MFXQueryVersion(encoder->hwenc.ENCses,&encoder->hwenc.ver);
            printf("Asked for version %d.%d.\n",vers.Major,vers.Minor);
            printf("SDK version loaded for the ENCODER session is %d.%d.\n",encoder->hwenc.ver.Major,encoder->hwenc.ver.Minor);
            break;
        }
    }


    //Initialization of VPP session for format conversion and potential scaling
    for(int i=0; i < sizeof(hwimpl)/sizeof(hwimpl[0]);i++)
    {
    encoder->hwenc.sts = MFXInit(hwimpl[i], &vers,&encoder->hwenc.VPPses);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);
        if(encoder->hwenc.sts == MFX_ERR_NONE)
        {
            MFXQueryVersion(encoder->hwenc.ENCses,&encoder->hwenc.ver);
            printf("SDK version loaded for the VPP session is %d.%d.\n",encoder->hwenc.ver.Major,encoder->hwenc.ver.Minor);
            break;
        }
    }

    //Initialization of encoder parameters
    memset(&encoder->hwenc.ENCParams,0,sizeof(encoder->hwenc.ENCParams));
    encoder->hwenc.ENCParams.mfx.CodecId                    = MFX_CODEC_AVC;
    encoder->hwenc.ENCParams.mfx.TargetUsage                = MFX_TARGETUSAGE_BALANCED;
    encoder->hwenc.ENCParams.mfx.TargetKbps                 = 2000; //Investigation required
    encoder->hwenc.ENCParams.mfx.RateControlMethod          = MFX_RATECONTROL_VBR;
    encoder->hwenc.ENCParams.mfx.FrameInfo.FrameRateExtN    = 30;
    encoder->hwenc.ENCParams.mfx.FrameInfo.FrameRateExtD    = 1;
    encoder->hwenc.ENCParams.mfx.FrameInfo.FourCC           = MFX_FOURCC_NV12;
    encoder->hwenc.ENCParams.mfx.FrameInfo.ChromaFormat     = MFX_CHROMAFORMAT_YUV420;
    encoder->hwenc.ENCParams.mfx.FrameInfo.PicStruct        = MFX_PICSTRUCT_PROGRESSIVE;
    encoder->hwenc.ENCParams.mfx.FrameInfo.CropX            = 0;
    encoder->hwenc.ENCParams.mfx.FrameInfo.CropY            = 0;
    encoder->hwenc.ENCParams.mfx.FrameInfo.CropW            = target_width;
    encoder->hwenc.ENCParams.mfx.FrameInfo.CropH            = target_height;

    //Width is aligned as a multiple of 16
    encoder->hwenc.ENCParams.mfx.FrameInfo.Width = MSDK_ALIGN16(target_width);

    //Same applies for height unless it's a field picture so it is a multiple of 32
    encoder->hwenc.ENCParams.mfx.FrameInfo.Height = (MFX_PICSTRUCT_PROGRESSIVE == encoder->hwenc.ENCParams.mfx.FrameInfo.PicStruct)?
        MSDK_ALIGN16(target_height) : MSDK_ALIGN32(target_height);

    encoder->hwenc.ENCParams.IOPattern = MFX_IOPATTERN_IN_SYSTEM_MEMORY;

    //Additional ENCODER configuration for low latency
    encoder->hwenc.ENCParams.AsyncDepth = 1;
    encoder->hwenc.ENCParams.mfx.GopRefDist = 1;//B-frames disabled

    mfxExtCodingOption extras;
    memset(&extras,0,sizeof(extras));
    extras.Header.BufferId = MFX_EXTBUFF_CODING_OPTION;
    extras.Header.BufferSz = sizeof(extras);
    extras.MaxDecFrameBuffering = 1;
    mfxExtBuffer *extrasBuf[1];
    extrasBuf[0] = (mfxExtBuffer*)&extras;
    encoder->hwenc.ENCParams.ExtParam = extrasBuf;
    encoder->hwenc.ENCParams.NumExtParam = 1;

    //Initialization of VPP parameters (input)
    memset(&encoder->hwenc.VPPParams,0,sizeof(encoder->hwenc.VPPParams));
    encoder->hwenc.VPPParams.vpp.In.FourCC          = MFX_FOURCC_RGB4;
    encoder->hwenc.VPPParams.vpp.In.ChromaFormat    = MFX_CHROMAFORMAT_YUV420;
    encoder->hwenc.VPPParams.vpp.In.CropX           = 0;
    encoder->hwenc.VPPParams.vpp.In.CropY           = 0;
    encoder->hwenc.VPPParams.vpp.In.CropW           = image->width;
    encoder->hwenc.VPPParams.vpp.In.CropH           = image->height;
    encoder->hwenc.VPPParams.vpp.In.PicStruct       = MFX_PICSTRUCT_PROGRESSIVE;
    encoder->hwenc.VPPParams.vpp.In.FrameRateExtN   = 30;
    encoder->hwenc.VPPParams.vpp.In.FrameRateExtD   = 1;

    //Width is aligned as a multiple of 16
    encoder->hwenc.VPPParams.vpp.In.Width = MSDK_ALIGN16(image->width);

    //Same applies for height unless it's a field picture so it is a multiple of 32
    encoder->hwenc.VPPParams.vpp.In.Height = (MFX_PICSTRUCT_PROGRESSIVE == encoder->hwenc.VPPParams.vpp.In.PicStruct) ?
        MSDK_ALIGN16(image->width) : MSDK_ALIGN32(image->height);

    //Initialization of VPP parameters (output)
    encoder->hwenc.VPPParams.vpp.Out.FourCC         = MFX_FOURCC_NV12;
    encoder->hwenc.VPPParams.vpp.Out.ChromaFormat   = MFX_CHROMAFORMAT_YUV420;
    encoder->hwenc.VPPParams.vpp.Out.CropX          = 0;
    encoder->hwenc.VPPParams.vpp.Out.CropY          = 0;
    encoder->hwenc.VPPParams.vpp.Out.CropW          = target_width;
    encoder->hwenc.VPPParams.vpp.Out.CropH          = target_height;
    encoder->hwenc.VPPParams.vpp.Out.PicStruct      = MFX_PICSTRUCT_PROGRESSIVE;
    encoder->hwenc.VPPParams.vpp.Out.FrameRateExtN  = 30;
    encoder->hwenc.VPPParams.vpp.Out.FrameRateExtD  = 1;

    //Width is aligned as a multiple of 16
    encoder->hwenc.VPPParams.vpp.Out.Width = MSDK_ALIGN16(target_width);

    //Same applies for height unless it's a field picture so it is a multiple of 32
    encoder->hwenc.VPPParams.vpp.Out.Height = (MFX_PICSTRUCT_PROGRESSIVE == encoder->hwenc.VPPParams.vpp.Out.PicStruct) ?
        MSDK_ALIGN16(image->width) : MSDK_ALIGN32(target_height);

    encoder->hwenc.VPPParams.AsyncDepth = 1;
    encoder->hwenc.VPPParams.IOPattern = MFX_IOPATTERN_IN_SYSTEM_MEMORY | MFX_IOPATTERN_OUT_SYSTEM_MEMORY;


    //Disabling VPP enabled by default ops
    mfxExtVPPDoNotUse dnu;
    memset(&dnu,0,sizeof(mfxExtVPPDoNotUse));
    dnu.Header.BufferId = MFX_EXTBUFF_VPP_DONOTUSE;
    dnu.Header.BufferSz = sizeof(mfxExtVPPDoNotUse);
    dnu.NumAlg = 4;
    dnu.AlgList = malloc(sizeof(mfxU32)*dnu.NumAlg);
    MSDK_CHECK_POINTER(dnu.AlgList, MFX_ERR_MEMORY_ALLOC);
    dnu.AlgList[0] = MFX_EXTBUFF_VPP_DENOISE;
    dnu.AlgList[1] = MFX_EXTBUFF_VPP_SCENE_ANALYSIS;
    dnu.AlgList[2] = MFX_EXTBUFF_VPP_DETAIL;
    dnu.AlgList[3] = MFX_EXTBUFF_VPP_PROCAMP;

    //Add the extended buffers
    mfxExtBuffer *dnuBuf[1];
    dnuBuf[0] = (mfxExtBuffer*)&dnu;
    encoder->hwenc.VPPParams.ExtParam = dnuBuf;
    encoder->hwenc.VPPParams.NumExtParam = 1;

    //Check VPPParams validity. Adjust if necessary.
    encoder->hwenc.sts = MFXVideoVPP_Query(encoder->hwenc.VPPses,&encoder->hwenc.VPPParams,&encoder->hwenc.VPPParams);
    //MSDK_IGNORE_MFX_STS(encoder->hwenc.sts, MFX_WRN_INCOMPATIBLE_VIDEO_PARAM);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

    //Validation of encoder parameters
    //If parameters are not valid the encoder will adjust the parameters as close as possible to the requested configuration
    encoder->hwenc.sts = MFXVideoENCODE_Query(encoder->hwenc.ENCses,&encoder->hwenc.ENCParams,&encoder->hwenc.ENCParams);
    //MSDK_IGNORE_MFX_STS(encoder->hwenc.sts, MFX_WRN_INCOMPATIBLE_VIDEO_PARAM);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

    //Ask the encoder how many surfaces it needs with this configuration
    mfxFrameAllocRequest ENCsurfReq;
    memset(&ENCsurfReq,0,sizeof(ENCsurfReq));
    encoder->hwenc.sts = MFXVideoENCODE_QueryIOSurf(encoder->hwenc.ENCses, &encoder->hwenc.ENCParams, &ENCsurfReq);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

    //Creation of the VPP component and querying for surface buffers
    mfxFrameAllocRequest VPPsurfReq[2];//An array structure where position [0] is for input and [1] is for output
    memset(&VPPsurfReq,0,sizeof(mfxFrameAllocRequest) * 2);
    encoder->hwenc.sts = MFXVideoVPP_QueryIOSurf(encoder->hwenc.VPPses,&encoder->hwenc.VPPParams,VPPsurfReq);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

    ENCsurfReq.Type |= MFX_MEMTYPE_FROM_VPPOUT; //Shared memory block for VPP out and ENCODER in

    encoder->hwenc.nVPPSurfs[0] = VPPsurfReq[0].NumFrameSuggested;
    encoder->hwenc.nVPPSurfs[1] = VPPsurfReq[1].NumFrameSuggested;
    printf("%d surfaces are needed for VPP input.\n",encoder->hwenc.nVPPSurfs[0]);
    encoder->hwenc.nENCSurfs = ENCsurfReq.NumFrameSuggested + encoder->hwenc.nVPPSurfs[1];
    encoder->hwenc.nVPPSurfs[1] = encoder->hwenc.nENCSurfs;
    printf("%d surfaces are needed for ENC input.\n",encoder->hwenc.nENCSurfs);

    //Allocate memory to vpp for input surfaces
    //Both width and height must be 32-bit aligned
    mfxU16 width = (mfxU16)MSDK_ALIGN32(encoder->hwenc.VPPParams.vpp.In.Width);
    mfxU16 height = (mfxU16)MSDK_ALIGN32(encoder->hwenc.VPPParams.vpp.In.Height);
    mfxU8  bitsPerPixel = 32;
    mfxU32 surfSize = (width * height * bitsPerPixel)>>3;


    //Surface VPP pointers housekeeping
    encoder->hwenc.VPPsurfbuffsIN = (mfxU8*)malloc(sizeof(surfSize)*encoder->hwenc.nVPPSurfs[0]);
    encoder->hwenc.ptrVPPSurfsIN = malloc(sizeof(mfxFrameSurface1*)*encoder->hwenc.nVPPSurfs[0]);
    MSDK_CHECK_POINTER(encoder->hwenc.ptrVPPSurfsIN,MFX_ERR_MEMORY_ALLOC);
    for(int i=0; i<encoder->hwenc.nVPPSurfs[0]; i++)
    {
        encoder->hwenc.ptrVPPSurfsIN[i] = malloc(sizeof(mfxFrameSurface1));
        memset(encoder->hwenc.ptrVPPSurfsIN[i],0,sizeof(mfxFrameSurface1));
        memcpy(&(encoder->hwenc.ptrVPPSurfsIN[i]->Info), &(encoder->hwenc.VPPParams.vpp.In), sizeof(mfxFrameInfo));
        encoder->hwenc.ptrVPPSurfsIN[i]->Data.B = &encoder->hwenc.VPPsurfbuffsIN[surfSize * i];//Assuming Top-Down layout and little-endian
        encoder->hwenc.ptrVPPSurfsIN[i]->Data.G = encoder->hwenc.ptrVPPSurfsIN[i]->Data.B + 1;
        encoder->hwenc.ptrVPPSurfsIN[i]->Data.R = encoder->hwenc.ptrVPPSurfsIN[i]->Data.G + 1;
        encoder->hwenc.ptrVPPSurfsIN[i]->Data.A = encoder->hwenc.ptrVPPSurfsIN[i]->Data.R + 1;
        encoder->hwenc.ptrVPPSurfsIN[i]->Data.Pitch = image->width*bitsPerPixel>>3;
    }

    //Allocate memory to the encoder for required surfaces (surfaces will be shared with VPP output)
    width = (mfxU16)MSDK_ALIGN32(ENCsurfReq.Info.Width);
    height = (mfxU16)MSDK_ALIGN32(ENCsurfReq.Info.Height);
    bitsPerPixel = 12;  // NV12 format is a 12 bits per pixel format
    surfSize = (width * height * bitsPerPixel)>>3;

    //Surface VPP & ENCODER pointers housekeeping
    encoder->hwenc.VPPsurfbuffsOUT = (mfxU8*)malloc(sizeof(surfSize)*encoder->hwenc.nENCSurfs);
    MSDK_CHECK_POINTER(encoder->hwenc.VPPsurfbuffsOUT, MFX_ERR_MEMORY_ALLOC);
    encoder->hwenc.ENCsurfbuffs = encoder->hwenc.VPPsurfbuffsOUT;
    encoder->hwenc.ptrVPPSurfsOUT = malloc(sizeof(mfxFrameSurface1*)*encoder->hwenc.nENCSurfs);//This is equivalent to mfxFrameSurface1*[encoder->hwenc.nENCSurfs]
    encoder->hwenc.ptrENCSurfs = malloc(sizeof(mfxFrameSurface1*)*encoder->hwenc.nENCSurfs);
    MSDK_CHECK_POINTER(encoder->hwenc.ptrVPPSurfsOUT, MFX_ERR_MEMORY_ALLOC);
    for(int i=0; i<encoder->hwenc.nENCSurfs; i++)
    {
        encoder->hwenc.ptrVPPSurfsOUT[i] = malloc(sizeof(mfxFrameSurface1));
        memset(encoder->hwenc.ptrVPPSurfsOUT[i],0,sizeof(mfxFrameSurface1));
        memcpy(&(encoder->hwenc.ptrVPPSurfsOUT[i]->Info), &(encoder->hwenc.VPPParams.vpp.Out), sizeof(mfxFrameInfo));
        encoder->hwenc.ptrVPPSurfsOUT[i]->Data.Y = &encoder->hwenc.VPPsurfbuffsOUT[surfSize * i];
        encoder->hwenc.ptrVPPSurfsOUT[i]->Data.U = encoder->hwenc.ptrVPPSurfsOUT[i]->Data.Y + target_width * target_height;
        encoder->hwenc.ptrVPPSurfsOUT[i]->Data.V = encoder->hwenc.ptrVPPSurfsOUT[i]->Data.U + 1;
        encoder->hwenc.ptrVPPSurfsOUT[i]->Data.Pitch = target_width;
        encoder->hwenc.ptrENCSurfs[i] = malloc(sizeof(mfxFrameSurface1));
        memcpy(&(encoder->hwenc.ptrENCSurfs[i]->Info), &(encoder->hwenc.ENCParams.mfx.FrameInfo), sizeof(mfxFrameInfo));
        memcpy(&(encoder->hwenc.ptrENCSurfs[i]->Data), &(encoder->hwenc.ptrVPPSurfsOUT[i]->Data), sizeof(mfxFrameData));
    }

    //Allocate memory to vpp for output surfaces
    //This is a shared resource because this acts as an intermediate buffer between VPP and ENCODE operations
    encoder->hwenc.ENCsurfbuffs = encoder->hwenc.VPPsurfbuffsOUT;
    MSDK_CHECK_POINTER(encoder->hwenc.ptrENCSurfs, MFX_ERR_MEMORY_ALLOC);
    MSDK_CHECK_POINTER(encoder->hwenc.ENCsurfbuffs, MFX_ERR_MEMORY_ALLOC);

    //Initialize Intel SDK VPP
    encoder->hwenc.sts = MFXVideoVPP_Init(encoder->hwenc.VPPses,&encoder->hwenc.VPPParams);
    //MSDK_IGNORE_MFX_STS(encoder->hwenc.sts, MFX_WRN_PARTIAL_ACCELERATION);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

    //Initialize Intel SDK Encoder
    encoder->hwenc.sts = MFXVideoENCODE_Init(encoder->hwenc.ENCses,&encoder->hwenc.ENCParams);
    //MSDK_IGNORE_MFX_STS(encoder->hwenc.sts, MFX_WRN_PARTIAL_ACCELERATION);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

    //Retrieve selected settings by encoder
    mfxVideoParam params;
    memset(&params, 0, sizeof(params));
    encoder->hwenc.sts = MFXVideoENCODE_GetVideoParam(encoder->hwenc.ENCses, &params);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

    //Prepare the buffer for the H.264 bitstream
    memset(&encoder->hwenc.bitstr, 0, sizeof(encoder->hwenc.bitstr));
    //Assignment of MaxLength parameter is mandatory.
    encoder->hwenc.bitstr.MaxLength = params.mfx.BufferSizeInKB * 1000;
    encoder->hwenc.bitstr.Data = malloc(sizeof(mfxU8)*encoder->hwenc.bitstr.MaxLength);
    MSDK_CHECK_POINTER(encoder->hwenc.bitstr.Data, MFX_ERR_MEMORY_ALLOC);

    encoder->image = image;
    encoder->width = (int)target_width;//Safe casting
    encoder->height = (int)target_height;//Safe casting
    printf("End of initialization.\n");
    return 1;
}

int encoder_x264_encode(Encoder_t *encoder) {
#ifdef BENCHMARK
#ifdef _WIN32
    LARGE_INTEGER tStart, tEnd;
    QueryPerformanceFrequency(&tStart);
    double freq = (double)tStart.QuadPart;
    QueryPerformanceCounter(&tStart);
#endif
#endif

    int surfVPPindexIN = 0, surfVPPindexOUT = 0, surfENCindex = 0;
    mfxSyncPoint VPPsync,ENCsync;
    encoder->hwenc.nENCFrame = 0;
    encoder->hwenc.sts = MFX_ERR_NONE;
    uint8_t* data;
    uint32_t len;

    if(encoder->image->bpp == 32)
        len = 4 * encoder->image->width * encoder->image->height;
    else
        len = 3 * encoder->image->width * encoder->image->height;

    if (cb_is_empty(&encoder->image->cb))
        return 0;
    printf("Expecting raw frame with size %d.\n",len);
    data = cb_read_direct(&encoder->image->cb, &len);
    printf("Got a frame %p, size: %d\n", data, len);

    //Main VPP & ENNCODING process loop
    while (MFX_ERR_NONE <= encoder->hwenc.sts || MFX_ERR_MORE_DATA == encoder->hwenc.sts)
    {
        printf("Entering 1st while loop.\n");
        surfVPPindexIN = alloc_surfpool(encoder->hwenc.ptrVPPSurfsIN, encoder->hwenc.nVPPSurfs[0]);
        MSDK_CHECK_ERROR(MFX_ERR_NOT_FOUND, surfVPPindexIN, MFX_ERR_MEMORY_ALLOC);
        printf("Surface index for VPP in is %d.\n", surfVPPindexIN);

        cb_read(&encoder->image->cb, &encoder->hwenc.ptrVPPSurfsIN[surfVPPindexIN]->Data.B, &len);
        surfVPPindexOUT = alloc_surfpool(encoder->hwenc.ptrVPPSurfsOUT, encoder->hwenc.nVPPSurfs[1]);
        surfENCindex = surfVPPindexOUT;
        MSDK_CHECK_ERROR(MFX_ERR_NOT_FOUND, surfVPPindexOUT, MFX_ERR_MEMORY_ALLOC);
        printf("Surface index for VPP out is %d.\n", surfVPPindexOUT);

    for(;;)
        {
            printf("Entering VPP for loop.\n");
            encoder->hwenc.sts = MFXVideoVPP_RunFrameVPPAsync(encoder->hwenc.VPPses, encoder->hwenc.ptrVPPSurfsIN[surfVPPindexIN], encoder->hwenc.ptrVPPSurfsOUT[surfVPPindexOUT],NULL,&VPPsync);
            if (MFX_WRN_DEVICE_BUSY == encoder->hwenc.sts)
            {
                printf("Device is busy, retrying...\n");
                Sleep(1); // Wait if device is busy, then repeat the same call
            }
            else
            {
                printf("Exiting VPP for loop with status code %d.\n",encoder->hwenc.sts);
                break;
            }
        }

        if (MFX_ERR_MORE_DATA == encoder->hwenc.sts) // More data is needed
        {
            printf("More data is needed for VPP.\n");
            continue;
        }

        MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);
        MSDK_BREAK_ON_ERROR(encoder->hwenc.sts);

        for(;;)
        {
            printf("Entering ENCODER for loop.\n");
            encoder->hwenc.sts = MFXVideoENCODE_EncodeFrameAsync(encoder->hwenc.ENCses,NULL,encoder->hwenc.ptrENCSurfs[surfENCindex], &encoder->hwenc.bitstr,&ENCsync);

            if (MFX_ERR_NONE < encoder->hwenc.sts && !ENCsync)
            {
                if (MFX_WRN_DEVICE_BUSY == encoder->hwenc.sts)
                    Sleep(1); // Wait if device is busy, then repeat the same call
            }
            else if (MFX_ERR_NONE < encoder->hwenc.sts && ENCsync)
            {
                printf("There are warnings but they are ignored.\n");
                encoder->hwenc.sts = MFX_ERR_NONE; //Ignore warnings
                break;
            }
            else if (MFX_ERR_NOT_ENOUGH_BUFFER == encoder->hwenc.sts)
            {
                printf("Must allocate more memory for output bitstream.\n");
                //Consider allocating more memory for bitstream output
                break;
            }
            else
            {
                printf("Exiting ENCODER for loop with status code %d.\n",encoder->hwenc.sts);
                break;
            }
        }

        if(MFX_ERR_NONE == encoder->hwenc.sts)
        {
            printf("Waiting for ENCODE operation to sync.\n");
            encoder->hwenc.sts = MFXVideoCORE_SyncOperation(encoder->hwenc.ENCses, ENCsync, 60000); // Synchronize. Wait until encoded frame is ready
            if(encoder->hwenc.sts == MFX_ERR_NONE) printf("ENCODE operation synchronized successfully\n");
            MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

            //Must send bitstream now
            ++encoder->hwenc.nENCFrame;
            printf("Sending bitstream.\n");
            encoder->hwenc.sts = send_h264stream(&encoder->hwenc.bitstr,encoder);
            printf("Bitstream exited with status code %d.\n",encoder->hwenc.sts);
            MSDK_BREAK_ON_ERROR(encoder->hwenc.sts);
        }

        MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);
        printf("Exiting 1st while loop.\n");
    }

    //Draining the VPP buffer
    while (MFX_ERR_NONE <= encoder->hwenc.sts || MFX_ERR_MORE_DATA == encoder->hwenc.sts)
    {
        printf("Entering 2nd while loop.\n");
        surfENCindex = alloc_surfpool(encoder->hwenc.ptrENCSurfs, encoder->hwenc.nENCSurfs);
        surfVPPindexOUT = surfENCindex;
        MSDK_CHECK_ERROR(MFX_ERR_NOT_FOUND, surfENCindex, MFX_ERR_MEMORY_ALLOC);

        for(;;)
        {
            printf("Entering VPP for loop.\n");
            encoder->hwenc.sts = MFXVideoVPP_RunFrameVPPAsync(encoder->hwenc.VPPses, NULL, encoder->hwenc.ptrVPPSurfsOUT[surfVPPindexOUT],NULL,&VPPsync);
            if (MFX_WRN_DEVICE_BUSY == encoder->hwenc.sts)
            {
                printf("Device is busy, retrying...\n");
                Sleep(1); // Wait if device is busy, then repeat the same call
            }
            else
            {
                printf("Exiting VPP for loop.\n");
                break;
            }
        }

        MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);
        MSDK_BREAK_ON_ERROR(encoder->hwenc.sts);

        for(;;)
        {
            printf("Entering ENCODER for loop.\n");
            encoder->hwenc.sts = MFXVideoENCODE_EncodeFrameAsync(encoder->hwenc.ENCses,NULL, NULL, &encoder->hwenc.bitstr,&ENCsync);

            if (MFX_ERR_NONE < encoder->hwenc.sts && !ENCsync)
            {
                if (MFX_WRN_DEVICE_BUSY == encoder->hwenc.sts)
                    Sleep(1); // Wait if device is busy, then repeat the same call
            }
            else if (MFX_ERR_NONE < encoder->hwenc.sts && ENCsync)
            {
                encoder->hwenc.sts = MFX_ERR_NONE; //Ignore warnings
                break;
            }
            else if (MFX_ERR_NOT_ENOUGH_BUFFER == encoder->hwenc.sts)
            {
                printf("Must allocate more memory for output bitstream.\n");
                //Consider allocating more memory for bitstream output
                break;
            }
            else
            {
                printf("Exiting ENCODER for loop.\n");
                break;
            }

        if(MFX_ERR_NONE == encoder->hwenc.sts)
        {
            encoder->hwenc.sts = MFXVideoCORE_SyncOperation(encoder->hwenc.ENCses, ENCsync, 50); // Synchronize. Wait until encoded frame is ready
            MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

            //Must send bitstream now
            ++encoder->hwenc.nENCFrame;
            encoder->hwenc.sts = send_h264stream(&encoder->hwenc.bitstr,encoder);
            MSDK_BREAK_ON_ERROR(encoder->hwenc.sts);
        }
    }
        printf("Exiting 2nd while loop.\n");
        MSDK_IGNORE_MFX_STS(encoder->hwenc.sts, MFX_ERR_MORE_DATA);
        MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);
    }
    //Draining ENCODER buffer
    while(MFX_ERR_NONE <= encoder->hwenc.sts)
    {
        printf("Entering 3rd while loop.\n");
        for(;;)
        {
            encoder->hwenc.sts = MFXVideoENCODE_EncodeFrameAsync(encoder->hwenc.ENCses, NULL, NULL, &encoder->hwenc.bitstr,&ENCsync);
            if (MFX_ERR_NONE < encoder->hwenc.sts && !ENCsync)
            {
                if (MFX_WRN_DEVICE_BUSY == encoder->hwenc.sts)
                    Sleep(1); // Wait if device is busy, then repeat the same call
            }
            else if (MFX_ERR_NONE < encoder->hwenc.sts && ENCsync)
            {
                encoder->hwenc.sts = MFX_ERR_NONE; //Ignore warnings
                break;
            }
            else if (MFX_ERR_NOT_ENOUGH_BUFFER == encoder->hwenc.sts)
            {
                printf("Must allocate more memory for output bitstream.\n");
                //Consider allocating more memory for bitstream output
                break;
            }
            else
            {
                printf("Exiting ENCODER for loop.\n");
                break;
            }
        }

        if(MFX_ERR_NONE == encoder->hwenc.sts)
        {
            encoder->hwenc.sts = MFXVideoCORE_SyncOperation(encoder->hwenc.ENCses, ENCsync, 50); // Synchronize. Wait until encoded frame is ready
            MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

            //Must send bitstream now
            ++encoder->hwenc.nENCFrame;
            encoder->hwenc.sts = send_h264stream(&encoder->hwenc.bitstr,encoder);
            MSDK_BREAK_ON_ERROR(encoder->hwenc.sts);
        }
    }

    MSDK_IGNORE_MFX_STS(encoder->hwenc.sts, MFX_ERR_MORE_SURFACE);
    MSDK_CHECK_RESULT(encoder->hwenc.sts, MFX_ERR_NONE, encoder->hwenc.sts);

#ifdef BENCHMARK
    QueryPerformanceCounter(&tEnd);
    double duration = ((double)tEnd.QuadPart - (double)tStart.QuadPart)  / freq;
    printf("\nExecution time: %3.2fs (%3.2ffps)\n", duration, ++encoder->hwenc.nENCFrame/duration);
#endif

    return 1;
}