/******************************************************************************\
Copyright (c) 2005-2019, Intel Corporation
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

This sample was distributed or derived from the Intel's Media Samples package.
The original version of this sample may be obtained from https://software.intel.com/en-us/intel-media-server-studio
or https://software.intel.com/en-us/media-client-solutions-support.
\**********************************************************************************/

#include "mfx_samples_config.h"

#if defined(_WIN32) || defined(_WIN64)

#include "sample_defs.h"

#if MFX_D3D11_SUPPORT

#include "d3d11_device.h"

CD3D11Device::CD3D11Device():
    m_nViews(0),
    m_bDefaultStereoEnabled(FALSE),
    m_bIsA2rgb10(FALSE),
    m_HandleWindow(NULL)
{
}

CD3D11Device::~CD3D11Device()
{
    Close();
}

mfxStatus CD3D11Device::FillSCD(mfxHDL hWindow, DXGI_SWAP_CHAIN_DESC& scd)
{
    scd.Windowed = TRUE;
    scd.OutputWindow = (HWND)hWindow;
    scd.SampleDesc.Count = 1;
    scd.BufferDesc.Format = (m_bIsA2rgb10) ? DXGI_FORMAT_R10G10B10A2_UNORM : DXGI_FORMAT_B8G8R8A8_UNORM;
    scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
    scd.BufferCount = 1;

    return MFX_ERR_NONE;
}

mfxStatus CD3D11Device::FillSCD1(DXGI_SWAP_CHAIN_DESC1& scd1)
{
    scd1.Width = 0;                                     // Use automatic sizing.
    scd1.Height = 0;
    scd1.Format = (m_bIsA2rgb10) ? DXGI_FORMAT_R10G10B10A2_UNORM : DXGI_FORMAT_B8G8R8A8_UNORM;
    scd1.Stereo = m_nViews == 2 ? TRUE : FALSE;
    scd1.SampleDesc.Count = 1;                          // Don't use multi-sampling.
    scd1.SampleDesc.Quality = 0;
    scd1.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
    scd1.BufferCount = 2;                               // Use double buffering to minimize latency.
    scd1.Scaling = DXGI_SCALING_STRETCH;
    scd1.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
    scd1.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;

    return MFX_ERR_NONE;
}

mfxStatus CD3D11Device::Init(
    mfxHDL hWindow,
    mfxU16 nViews,
    mfxU32 nAdapterNum)
{
    m_HandleWindow = (HWND)hWindow;
    mfxStatus sts = MFX_ERR_NONE;
    HRESULT hres = S_OK;
    m_nViews = nViews;
    if (2 < nViews)
        return MFX_ERR_UNSUPPORTED;
    m_bDefaultStereoEnabled = FALSE;

    static D3D_FEATURE_LEVEL FeatureLevels[] = {
        D3D_FEATURE_LEVEL_11_1,
        D3D_FEATURE_LEVEL_11_0,
        D3D_FEATURE_LEVEL_10_1,
        D3D_FEATURE_LEVEL_10_0
    };
    D3D_FEATURE_LEVEL pFeatureLevelsOut;

    hres = CreateDXGIFactory(__uuidof(IDXGIFactory2), (void**)(&m_pDXGIFactory) );
    if (FAILED(hres))
        return MFX_ERR_DEVICE_FAILED;

    if (m_nViews == 2)
    {
        hres = m_pDXGIFactory->QueryInterface(__uuidof(IDXGIDisplayControl), (void **)&m_pDisplayControl);
        if (FAILED(hres))
            return MFX_ERR_DEVICE_FAILED;

        m_bDefaultStereoEnabled = m_pDisplayControl->IsStereoEnabled();
        if (!m_bDefaultStereoEnabled)
            m_pDisplayControl->SetStereoEnabled(TRUE);
    }

    hres = m_pDXGIFactory->EnumAdapters(nAdapterNum,&m_pAdapter);
    if (FAILED(hres))
        return MFX_ERR_DEVICE_FAILED;

    hres =  D3D11CreateDevice(m_pAdapter ,
                            D3D_DRIVER_TYPE_UNKNOWN,
                            NULL,
                            0,
                            FeatureLevels,
                            MSDK_ARRAY_LEN(FeatureLevels),
                            D3D11_SDK_VERSION,
                            &m_pD3D11Device,
                            &pFeatureLevelsOut,
                            &m_pD3D11Ctx);

    if (FAILED(hres))
        return MFX_ERR_DEVICE_FAILED;

    m_pDXGIDev = m_pD3D11Device;
    m_pDX11VideoDevice = m_pD3D11Device;
    m_pVideoContext = m_pD3D11Ctx;

    MSDK_CHECK_POINTER(m_pDXGIDev.p, MFX_ERR_NULL_PTR);
    MSDK_CHECK_POINTER(m_pDX11VideoDevice.p, MFX_ERR_NULL_PTR);
    MSDK_CHECK_POINTER(m_pVideoContext.p, MFX_ERR_NULL_PTR);

    // turn on multithreading for the Context
    CComQIPtr<ID3D10Multithread> p_mt(m_pVideoContext);

    if (p_mt)
        p_mt->SetMultithreadProtected(true);
    else
        return MFX_ERR_DEVICE_FAILED;

    // create swap chain only for rendering use case (hWindow != 0)
    if (hWindow)
    {
        MSDK_CHECK_POINTER(m_pDXGIFactory.p, MFX_ERR_NULL_PTR);
        DXGI_SWAP_CHAIN_DESC1 swapChainDesc = {0};

        sts = FillSCD1(swapChainDesc);
        MSDK_CHECK_STATUS(sts, "FillSCD1 failed");

        hres = m_pDXGIFactory->CreateSwapChainForHwnd(m_pD3D11Device,
            (HWND)hWindow,
            &swapChainDesc,
            NULL,
            NULL,
            reinterpret_cast<IDXGISwapChain1**>(&m_pSwapChain));
        if (FAILED(hres))
            return MFX_ERR_DEVICE_FAILED;
    }

    return sts;
}

mfxStatus CD3D11Device::CreateVideoProcessor(mfxFrameSurface1 * pSrf)
{
    HRESULT hres = S_OK;

    if (m_VideoProcessorEnum.p || NULL == pSrf)
        return MFX_ERR_NONE;

    //create video processor
    D3D11_VIDEO_PROCESSOR_CONTENT_DESC ContentDesc;
    MSDK_ZERO_MEMORY( ContentDesc );

    ContentDesc.InputFrameFormat = D3D11_VIDEO_FRAME_FORMAT_PROGRESSIVE;
    ContentDesc.InputFrameRate.Numerator = 30000;
    ContentDesc.InputFrameRate.Denominator = 1000;
    ContentDesc.InputWidth  = pSrf->Info.CropW;
    ContentDesc.InputHeight = pSrf->Info.CropH;
    ContentDesc.OutputWidth = pSrf->Info.CropW;
    ContentDesc.OutputHeight = pSrf->Info.CropH;
    ContentDesc.OutputFrameRate.Numerator = 30000;
    ContentDesc.OutputFrameRate.Denominator = 1000;

    ContentDesc.Usage = D3D11_VIDEO_USAGE_PLAYBACK_NORMAL;

    hres = m_pDX11VideoDevice->CreateVideoProcessorEnumerator( &ContentDesc, &m_VideoProcessorEnum );
    if (FAILED(hres))
        return MFX_ERR_DEVICE_FAILED;

    hres = m_pDX11VideoDevice->CreateVideoProcessor( m_VideoProcessorEnum, 0, &m_pVideoProcessor );
    if (FAILED(hres))
        return MFX_ERR_DEVICE_FAILED;

    return MFX_ERR_NONE;
}

mfxStatus CD3D11Device::Reset()
{
    // Changing video mode back to the original state
    if (2 == m_nViews && !m_bDefaultStereoEnabled)
        m_pDisplayControl->SetStereoEnabled(FALSE);

    MSDK_CHECK_POINTER (m_pDXGIFactory.p, MFX_ERR_NULL_PTR);
    DXGI_SWAP_CHAIN_DESC1 swapChainDesc = {0};

    mfxStatus sts = FillSCD1(swapChainDesc);
    MSDK_CHECK_STATUS(sts, "FillSCD1 failed");

    HRESULT hres = S_OK;
    hres = m_pDXGIFactory->CreateSwapChainForHwnd(m_pD3D11Device,
        (HWND)m_HandleWindow,
        &swapChainDesc,
        NULL,
        NULL,
        reinterpret_cast<IDXGISwapChain1**>(&m_pSwapChain));

    if (FAILED(hres))
    {
        if (swapChainDesc.Stereo)
        {
            MSDK_PRINT_RET_MSG(MFX_ERR_DEVICE_FAILED,"Cannot create swap chain required for rendering. Possibly stereo mode is not supported.");
        }
        else
        {
            MSDK_PRINT_RET_MSG(MFX_ERR_DEVICE_FAILED, "Cannot create swap chain required for rendering.");
        }

        return MFX_ERR_DEVICE_FAILED;
    }
    return MFX_ERR_NONE;
}

mfxStatus CD3D11Device::GetHandle(mfxHandleType type, mfxHDL *pHdl)
{
    if (MFX_HANDLE_D3D11_DEVICE == type)
    {
        *pHdl = m_pD3D11Device.p;
        return MFX_ERR_NONE;
    }
    return MFX_ERR_UNSUPPORTED;
}

mfxStatus CD3D11Device::SetHandle(mfxHandleType type, mfxHDL hdl)
{
    if (MFX_HANDLE_DEVICEWINDOW == type && hdl != NULL) //for render window handle
    {
        m_HandleWindow = (HWND)hdl;
        return MFX_ERR_NONE;
    }
    return MFX_ERR_UNSUPPORTED;
}

mfxStatus CD3D11Device::RenderFrame(mfxFrameSurface1 * pSrf, mfxFrameAllocator * pAlloc)
{
    HRESULT hres = S_OK;
    mfxStatus sts;

    sts = CreateVideoProcessor(pSrf);
    MSDK_CHECK_STATUS(sts, "CreateVideoProcessor failed");

    hres = m_pSwapChain->GetBuffer(0, __uuidof( ID3D11Texture2D ), (void**)&m_pDXGIBackBuffer.p);
    if (FAILED(hres))
        return MFX_ERR_DEVICE_FAILED;

    D3D11_VIDEO_PROCESSOR_OUTPUT_VIEW_DESC OutputViewDesc;
    if (2 == m_nViews)
    {
        m_pVideoContext->VideoProcessorSetStreamStereoFormat(m_pVideoProcessor, 0, TRUE,D3D11_VIDEO_PROCESSOR_STEREO_FORMAT_SEPARATE,
            TRUE, TRUE, D3D11_VIDEO_PROCESSOR_STEREO_FLIP_NONE, NULL);
        m_pVideoContext->VideoProcessorSetOutputStereoMode(m_pVideoProcessor,TRUE);

        OutputViewDesc.ViewDimension = D3D11_VPOV_DIMENSION_TEXTURE2DARRAY;
        OutputViewDesc.Texture2DArray.ArraySize = 2;
        OutputViewDesc.Texture2DArray.MipSlice = 0;
        OutputViewDesc.Texture2DArray.FirstArraySlice = 0;
    }
    else
    {
        OutputViewDesc.ViewDimension = D3D11_VPOV_DIMENSION_TEXTURE2D;
        OutputViewDesc.Texture2D.MipSlice = 0;
    }

    if (1 == m_nViews || 0 == pSrf->Info.FrameId.ViewId)
    {
        hres = m_pDX11VideoDevice->CreateVideoProcessorOutputView(
            m_pDXGIBackBuffer,
            m_VideoProcessorEnum,
            &OutputViewDesc,
            &m_pOutputView.p );
        if (FAILED(hres))
            return MFX_ERR_DEVICE_FAILED;
    }

    D3D11_VIDEO_PROCESSOR_INPUT_VIEW_DESC InputViewDesc;
    InputViewDesc.FourCC = 0;
    InputViewDesc.ViewDimension = D3D11_VPIV_DIMENSION_TEXTURE2D;
    InputViewDesc.Texture2D.MipSlice = 0;
    InputViewDesc.Texture2D.ArraySlice = 0;

    mfxHDLPair pair = {NULL};
    sts = pAlloc->GetHDL(pAlloc->pthis, pSrf->Data.MemId, (mfxHDL*)&pair);
    MSDK_CHECK_STATUS(sts, "pAlloc->GetHDL failed");

    ID3D11Texture2D  *pRTTexture2D = reinterpret_cast<ID3D11Texture2D*>(pair.first);
    D3D11_TEXTURE2D_DESC RTTexture2DDesc;

    if(!m_pTempTexture && m_nViews == 2)
    {
        pRTTexture2D->GetDesc(&RTTexture2DDesc);
        hres = m_pD3D11Device->CreateTexture2D(&RTTexture2DDesc,NULL,&m_pTempTexture.p);
        if (FAILED(hres))
            return MFX_ERR_DEVICE_FAILED;
    }

    // Creating input views for left and righ eyes
    if (1 == m_nViews)
    {
        hres = m_pDX11VideoDevice->CreateVideoProcessorInputView(
            pRTTexture2D,
            m_VideoProcessorEnum,
            &InputViewDesc,
            &m_pInputViewLeft.p );

    }
    else if (2 == m_nViews && 0 == pSrf->Info.FrameId.ViewId)
    {
        m_pD3D11Ctx->CopyResource(m_pTempTexture,pRTTexture2D);
        hres = m_pDX11VideoDevice->CreateVideoProcessorInputView(
            m_pTempTexture,
            m_VideoProcessorEnum,
            &InputViewDesc,
            &m_pInputViewLeft.p );
    }
    else
    {
        hres = m_pDX11VideoDevice->CreateVideoProcessorInputView(
            pRTTexture2D,
            m_VideoProcessorEnum,
            &InputViewDesc,
            &m_pInputViewRight.p );
    }
    if (FAILED(hres))
        return MFX_ERR_DEVICE_FAILED;

    //  NV12 surface to RGB backbuffer
    RECT rect = {0};
    rect.right  = pSrf->Info.CropW;
    rect.bottom = pSrf->Info.CropH;

    D3D11_VIDEO_PROCESSOR_STREAM StreamData;

    if (1 == m_nViews || pSrf->Info.FrameId.ViewId == 1)
    {
        StreamData.Enable = TRUE;
        StreamData.OutputIndex = 0;
        StreamData.InputFrameOrField = 0;
        StreamData.PastFrames = 0;
        StreamData.FutureFrames = 0;
        StreamData.ppPastSurfaces = NULL;
        StreamData.ppFutureSurfaces = NULL;
        StreamData.pInputSurface = m_pInputViewLeft;
        StreamData.ppPastSurfacesRight = NULL;
        StreamData.ppFutureSurfacesRight = NULL;
        StreamData.pInputSurfaceRight = m_nViews == 2 ? m_pInputViewRight : NULL;

        m_pVideoContext->VideoProcessorSetStreamSourceRect(m_pVideoProcessor, 0, true, &rect);
        m_pVideoContext->VideoProcessorSetStreamFrameFormat( m_pVideoProcessor, 0, D3D11_VIDEO_FRAME_FORMAT_PROGRESSIVE);
        hres = m_pVideoContext->VideoProcessorBlt( m_pVideoProcessor, m_pOutputView, 0, 1, &StreamData );
        if (FAILED(hres))
            return MFX_ERR_DEVICE_FAILED;
    }

    if (1 == m_nViews || 1 == pSrf->Info.FrameId.ViewId)
    {
        DXGI_PRESENT_PARAMETERS parameters = {0};
        hres = m_pSwapChain->Present1(0, 0, &parameters);
        if (FAILED(hres))
            return MFX_ERR_DEVICE_FAILED;
    }

    return MFX_ERR_NONE;
}

void CD3D11Device::Close()
{
    // Changing video mode back to the original state
    if (2 == m_nViews && !m_bDefaultStereoEnabled)
        m_pDisplayControl->SetStereoEnabled(FALSE);

    m_HandleWindow = NULL;
}

#endif // #if MFX_D3D11_SUPPORT
#endif // #if defined(_WIN32) || defined(_WIN64)
