// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html

#include "precomp.hpp"
#if defined _WIN32 && defined HAVE_MSMF
/*
   Media Foundation-based Video Capturing module is based on
   videoInput library by Evgeny Pereguda:
   http://www.codeproject.com/Articles/559437/Capturing-of-video-from-web-camera-on-Windows-7-an
   Originally licensed under The Code Project Open License (CPOL) 1.02:
   http://www.codeproject.com/info/cpol10.aspx
*/
//require Windows 8 for some of the formats defined otherwise could baseline on lower version
#if WINVER < _WIN32_WINNT_WIN8
#undef WINVER
#define WINVER _WIN32_WINNT_WIN8
#endif
#include <windows.h>
#include <guiddef.h>
#include <mfidl.h>
#include <mfapi.h>
#include <mfplay.h>
#include <mfobjects.h>
#include <tchar.h>
#include <strsafe.h>
#include <Mfreadwrite.h>
#ifdef HAVE_MSMF_DXVA
#include <d3d11.h>
#include <d3d11_4.h>
#endif
#include <new>
#include <map>
#include <vector>
#include <string>
#include <algorithm>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>

#ifdef _MSC_VER
#pragma warning(disable:4503)
#pragma comment(lib, "mfplat")
#pragma comment(lib, "mf")
#pragma comment(lib, "mfuuid")
#pragma comment(lib, "Strmiids")
#pragma comment(lib, "Mfreadwrite")
#ifdef HAVE_MSMF_DXVA
#pragma comment(lib, "d3d11")
// MFCreateDXGIDeviceManager() is available since Win8 only.
// To avoid OpenCV loading failure on Win7 use dynamic detection of this symbol.
// Details: https://github.com/opencv/opencv/issues/11858
typedef HRESULT (WINAPI *FN_MFCreateDXGIDeviceManager)(UINT *resetToken, IMFDXGIDeviceManager **ppDeviceManager);
static bool pMFCreateDXGIDeviceManager_initialized = false;
static FN_MFCreateDXGIDeviceManager pMFCreateDXGIDeviceManager = NULL;
static void init_MFCreateDXGIDeviceManager()
{
    HMODULE h = LoadLibraryExA("mfplat.dll", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
    if (h)
    {
        pMFCreateDXGIDeviceManager = (FN_MFCreateDXGIDeviceManager)GetProcAddress(h, "MFCreateDXGIDeviceManager");
    }
    pMFCreateDXGIDeviceManager_initialized = true;
}
#endif
#pragma comment(lib, "Shlwapi.lib")
#endif

#include <mferror.h>

#include <comdef.h>

#include <shlwapi.h>  // QISearch

struct IMFMediaType;
struct IMFActivate;
struct IMFMediaSource;
struct IMFAttributes;

namespace
{

template <class T>
class ComPtr
{
public:
    ComPtr()
    {
    }
    ComPtr(T* lp)
    {
        p = lp;
    }
    ComPtr(_In_ const ComPtr<T>& lp)
    {
        p = lp.p;
    }
    virtual ~ComPtr()
    {
    }

    T** operator&()
    {
        CV_Assert(p == NULL);
        return p.operator&();
    }
    T* operator->() const
    {
        CV_Assert(p != NULL);
        return p.operator->();
    }
    operator bool()
    {
        return p.operator!=(NULL);
    }

    T* Get() const
    {
        return p;
    }

    void Release()
    {
        if (p)
            p.Release();
    }

    // query for U interface
    template<typename U>
    HRESULT As(_Out_ ComPtr<U>& lp) const
    {
        lp.Release();
        return p->QueryInterface(__uuidof(U), reinterpret_cast<void**>((T**)&lp));
    }
private:
    _COM_SMARTPTR_TYPEDEF(T, __uuidof(T));
    TPtr p;
};

#define _ComPtr ComPtr

template <typename T> inline T absDiff(T a, T b) { return a >= b ? a - b : b - a; }

//==================================================================================================

// Structure for collecting info about types of video which are supported by current video device
struct MediaType
{
    UINT32 width;
    UINT32 height;
    INT32 stride; // stride is negative if image is bottom-up
    UINT32 isFixedSize;
    UINT32 frameRateNum;
    UINT32 frameRateDenom;
    UINT32 aspectRatioNum;
    UINT32 aspectRatioDenom;
    UINT32 sampleSize;
    UINT32 interlaceMode;
    GUID majorType; // video or audio
    GUID subType; // fourCC
    MediaType(IMFMediaType *pType = 0) :
        width(0), height(0),
        stride(0),
        isFixedSize(true),
        frameRateNum(1), frameRateDenom(1),
        aspectRatioNum(1), aspectRatioDenom(1),
        sampleSize(0),
        interlaceMode(0),
        majorType(MFMediaType_Video),
        subType({ 0 })
    {
        if (pType)
        {
            MFGetAttributeSize(pType, MF_MT_FRAME_SIZE, &width, &height);
            pType->GetUINT32(MF_MT_DEFAULT_STRIDE, (UINT32*)&stride); // value is stored as UINT32 but should be casted to INT3)
            pType->GetUINT32(MF_MT_FIXED_SIZE_SAMPLES, &isFixedSize);
            MFGetAttributeRatio(pType, MF_MT_FRAME_RATE, &frameRateNum, &frameRateDenom);
            MFGetAttributeRatio(pType, MF_MT_PIXEL_ASPECT_RATIO, &aspectRatioNum, &aspectRatioDenom);
            pType->GetUINT32(MF_MT_SAMPLE_SIZE, &sampleSize);
            pType->GetUINT32(MF_MT_INTERLACE_MODE, &interlaceMode);
            pType->GetGUID(MF_MT_MAJOR_TYPE, &majorType);
            pType->GetGUID(MF_MT_SUBTYPE, &subType);
        }
    }
    static MediaType createDefault()
    {
        MediaType res;
        res.width = 640;
        res.height = 480;
        res.setFramerate(30.0);
        return res;
    }
    inline bool isEmpty() const
    {
        return width == 0 && height == 0;
    }
    _ComPtr<IMFMediaType> createMediaType() const
    {
        _ComPtr<IMFMediaType> res;
        MFCreateMediaType(&res);
        if (width != 0 || height != 0)
            MFSetAttributeSize(res.Get(), MF_MT_FRAME_SIZE, width, height);
        if (stride != 0)
            res->SetUINT32(MF_MT_DEFAULT_STRIDE, stride);
        res->SetUINT32(MF_MT_FIXED_SIZE_SAMPLES, isFixedSize);
        if (frameRateNum != 0 || frameRateDenom != 0)
            MFSetAttributeRatio(res.Get(), MF_MT_FRAME_RATE, frameRateNum, frameRateDenom);
        if (aspectRatioNum != 0 || aspectRatioDenom != 0)
            MFSetAttributeRatio(res.Get(), MF_MT_PIXEL_ASPECT_RATIO, aspectRatioNum, aspectRatioDenom);
        if (sampleSize > 0)
            res->SetUINT32(MF_MT_SAMPLE_SIZE, sampleSize);
        res->SetUINT32(MF_MT_INTERLACE_MODE, interlaceMode);
        if (majorType != GUID())
            res->SetGUID(MF_MT_MAJOR_TYPE, majorType);
        if (subType != GUID())
            res->SetGUID(MF_MT_SUBTYPE, subType);
        return res;
    }
    void setFramerate(double fps)
    {
        frameRateNum = (UINT32)cvRound(fps * 1000.0);
        frameRateDenom = 1000;
    }
    double getFramerate() const
    {
        return frameRateDenom != 0 ? ((double)frameRateNum) / ((double)frameRateDenom) : 0;
    }
    LONGLONG getFrameStep() const
    {
        const double fps = getFramerate();
        return (LONGLONG)(fps > 0 ? 1e7 / fps : 0);
    }
    inline unsigned long resolutionDiff(const MediaType& other) const
    {
        const unsigned long wdiff = absDiff(width, other.width);
        const unsigned long hdiff = absDiff(height, other.height);
        return wdiff + hdiff;
    }
    // check if 'this' is better than 'other' comparing to reference
    bool isBetterThan(const MediaType& other, const MediaType& ref) const
    {
        const unsigned long thisDiff = resolutionDiff(ref);
        const unsigned long otherDiff = other.resolutionDiff(ref);
        if (thisDiff < otherDiff)
            return true;
        if (thisDiff == otherDiff)
        {
            if (width > other.width)
                return true;
            if (width == other.width && height > other.height)
                return true;
            if (width == other.width && height == other.height)
            {
                const double thisRateDiff = absDiff(getFramerate(), ref.getFramerate());
                const double otherRateDiff = absDiff(other.getFramerate(), ref.getFramerate());
                if (thisRateDiff < otherRateDiff)
                    return true;
            }
        }
        return false;
    }
};

void printFormat(std::ostream& out, const GUID& fmt)
{
#define PRNT(FMT) else if (fmt == FMT) out << #FMT;
    if (fmt == MFVideoFormat_Base) out << "Base";
    PRNT(MFVideoFormat_RGB32)
    PRNT(MFVideoFormat_ARGB32)
    PRNT(MFVideoFormat_RGB24)
    PRNT(MFVideoFormat_RGB555)
    PRNT(MFVideoFormat_RGB565)
    PRNT(MFVideoFormat_RGB8)
    else
    {
        char fourcc[5] = { 0 };
        memcpy(fourcc, &fmt.Data1, 4);
        out << fourcc;
    }
#undef PRNT
}

std::ostream& operator<<(std::ostream& out, const MediaType& mt)
{
    out << "(" << mt.width << "x" << mt.height << " @ " << mt.getFramerate() << ") ";
    printFormat(out, mt.subType);
    return out;
}

//==================================================================================================

// Class for creating of Media Foundation context
class Media_Foundation
{
public:
    ~Media_Foundation(void) { /*CV_Assert(SUCCEEDED(MFShutdown()));*/ CoUninitialize(); }
    static Media_Foundation& getInstance()
    {
        static Media_Foundation instance;
        return instance;
    }
private:
    Media_Foundation(void) { CoInitialize(0); CV_Assert(SUCCEEDED(MFStartup(MF_VERSION))); }
};

//==================================================================================================

class SourceReaderCB : public IMFSourceReaderCallback
{
public:
    SourceReaderCB() :
        m_nRefCount(0), m_hEvent(CreateEvent(NULL, FALSE, FALSE, NULL)), m_bEOS(FALSE), m_hrStatus(S_OK), m_reader(NULL), m_dwStreamIndex(0)
    {
    }

    // IUnknown methods
    STDMETHODIMP QueryInterface(REFIID iid, void** ppv) CV_OVERRIDE
    {
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable:4838)
#endif
        static const QITAB qit[] =
        {
            QITABENT(SourceReaderCB, IMFSourceReaderCallback),
            { 0 },
        };
#ifdef _MSC_VER
#pragma warning(pop)
#endif
        return QISearch(this, qit, iid, ppv);
    }
    STDMETHODIMP_(ULONG) AddRef() CV_OVERRIDE
    {
        return InterlockedIncrement(&m_nRefCount);
    }
    STDMETHODIMP_(ULONG) Release() CV_OVERRIDE
    {
        ULONG uCount = InterlockedDecrement(&m_nRefCount);
        if (uCount == 0)
        {
            delete this;
        }
        return uCount;
    }

    STDMETHODIMP OnReadSample(HRESULT hrStatus, DWORD dwStreamIndex, DWORD dwStreamFlags, LONGLONG llTimestamp, IMFSample *pSample) CV_OVERRIDE
    {
        CV_UNUSED(llTimestamp);

        HRESULT hr = 0;
        cv::AutoLock lock(m_mutex);

        if (SUCCEEDED(hrStatus))
        {
            if (pSample)
            {
                CV_LOG_DEBUG(NULL, "videoio(MSMF): got frame at " << llTimestamp);
                if (m_lastSample.Get())
                {
                    CV_LOG_DEBUG(NULL, "videoio(MSMF): drop frame (not processed)");
                }
                m_lastSample = pSample;
            }
        }
        else
        {
            CV_LOG_WARNING(NULL, "videoio(MSMF): OnReadSample() is called with error status: " << hrStatus);
        }

        if (MF_SOURCE_READERF_ENDOFSTREAM & dwStreamFlags)
        {
            // Reached the end of the stream.
            m_bEOS = true;
        }
        m_hrStatus = hrStatus;

        if (FAILED(hr = m_reader->ReadSample(dwStreamIndex, 0, NULL, NULL, NULL, NULL)))
        {
            CV_LOG_WARNING(NULL, "videoio(MSMF): async ReadSample() call is failed with error status: " << hr);
            m_bEOS = true;
        }

        if (pSample || m_bEOS)
        {
            SetEvent(m_hEvent);
        }
        return S_OK;
    }

    STDMETHODIMP OnEvent(DWORD, IMFMediaEvent *) CV_OVERRIDE
    {
        return S_OK;
    }
    STDMETHODIMP OnFlush(DWORD) CV_OVERRIDE
    {
        return S_OK;
    }

    HRESULT Wait(DWORD dwMilliseconds, _ComPtr<IMFSample>& videoSample, BOOL& pbEOS)
    {
        pbEOS = FALSE;

        DWORD dwResult = WaitForSingleObject(m_hEvent, dwMilliseconds);
        if (dwResult == WAIT_TIMEOUT)
        {
            return E_PENDING;
        }
        else if (dwResult != WAIT_OBJECT_0)
        {
            return HRESULT_FROM_WIN32(GetLastError());
        }

        pbEOS = m_bEOS;
        if (!pbEOS)
        {
            cv::AutoLock lock(m_mutex);
            videoSample = m_lastSample;
            CV_Assert(videoSample);
            m_lastSample.Release();
            ResetEvent(m_hEvent);  // event is auto-reset, but we need this forced reset due time gap between wait() and mutex hold.
        }

        return m_hrStatus;
    }
private:
    // Destructor is private. Caller should call Release.
    virtual ~SourceReaderCB()
    {
        CV_LOG_WARNING(NULL, "terminating async callback");
    }

public:
    long                m_nRefCount;        // Reference count.
    cv::Mutex           m_mutex;
    HANDLE              m_hEvent;
    BOOL                m_bEOS;
    HRESULT             m_hrStatus;

    IMFSourceReader *m_reader;
    DWORD m_dwStreamIndex;
    _ComPtr<IMFSample>  m_lastSample;
};

//==================================================================================================

// Enumerate and store supported formats and finds format which is most similar to the one requested
class FormatStorage
{
public:
    struct MediaID
    {
        DWORD stream;
        DWORD media;
        MediaID() : stream(0), media(0) {}
        void nextStream()
        {
            stream++;
            media = 0;
        }
        void nextMedia()
        {
            media++;
        }
        bool operator<(const MediaID& other) const
        {
            return (stream < other.stream) || (stream == other.stream && media < other.media);
        }
    };
    void read(IMFSourceReader* source)
    {
        HRESULT hr = S_OK;
        MediaID cur;
        while (SUCCEEDED(hr))
        {
            _ComPtr<IMFMediaType> raw_type;
            hr = source->GetNativeMediaType(cur.stream, cur.media, &raw_type);
            if (hr == MF_E_NO_MORE_TYPES)
            {
                hr = S_OK;
                cur.nextStream();
            }
            else if (SUCCEEDED(hr))
            {
                formats[cur] = MediaType(raw_type.Get());
                cur.nextMedia();
            }
        }
    }
    std::pair<MediaID, MediaType> findBestVideoFormat(const MediaType& newType)
    {
        std::pair<MediaID, MediaType> best;
        std::map<MediaID, MediaType>::const_iterator i = formats.begin();
        for (; i != formats.end(); ++i)
        {
            if (i->second.majorType != MFMediaType_Video)
                continue;
            if (newType.isEmpty()) // file input - choose first returned media type
            {
                best = *i;
                break;
            }
            if (best.second.isEmpty() || i->second.isBetterThan(best.second, newType))
            {
                best = *i;
            }
        }
        return best;
    }
private:
    std::map<MediaID, MediaType> formats;
};

//==================================================================================================

// Enumerates devices and activates one of them
class DeviceList
{
public:
    DeviceList() : devices(NULL), count(0) {}
    ~DeviceList()
    {
        if (devices)
        {
            for (UINT32 i = 0; i < count; ++i)
                if (devices[i])
                    devices[i]->Release();
            CoTaskMemFree(devices);
        }
    }
    UINT32 read(IID sourceType = MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID)
    {
        _ComPtr<IMFAttributes> attr;
        if (FAILED(MFCreateAttributes(&attr, 1)) ||
            FAILED(attr->SetGUID(MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, sourceType)))
        {
            CV_Error(CV_StsError, "Failed to create attributes");
        }
        if (FAILED(MFEnumDeviceSources(attr.Get(), &devices, &count)))
        {
            CV_LOG_DEBUG(NULL, "Failed to enumerate MSMF devices");
            return 0;
        }
        return count;
    }
    _ComPtr<IMFMediaSource> activateSource(UINT32 index)
    {
        _ComPtr<IMFMediaSource> result;
        if (count == 0 || index >= count || FAILED(devices[index]->ActivateObject(__uuidof(IMFMediaSource), (void**)&result)))
        {
            CV_LOG_DEBUG(NULL, "Failed to activate media source (device " << index << ")");
        }
        return result;
    }
private:
    IMFActivate** devices;
    UINT32 count;
};

} // namespace::

//==================================================================================================

/******* Capturing video from camera or file via Microsoft Media Foundation **********/
class CvCapture_MSMF : public cv::IVideoCapture
{
public:
    typedef enum {
        MODE_SW = 0,
        MODE_HW = 1
    } MSMFCapture_Mode;
    CvCapture_MSMF();
    virtual ~CvCapture_MSMF();
    virtual bool open(int);
    virtual bool open(const cv::String&);
    virtual void close();
    virtual double getProperty(int) const CV_OVERRIDE;
    virtual bool setProperty(int, double) CV_OVERRIDE;
    virtual bool grabFrame() CV_OVERRIDE;
    virtual bool retrieveFrame(int, cv::OutputArray) CV_OVERRIDE;
    virtual bool isOpened() const CV_OVERRIDE { return isOpen; }
    virtual int getCaptureDomain() CV_OVERRIDE { return CV_CAP_MSMF; }
protected:
    bool configureOutput(MediaType newType, cv::uint32_t outFormat);
    bool setTime(double time, bool rough);
    bool configureHW(bool enable);

    template <typename CtrlT>
    bool readComplexPropery(long prop, long& val) const;
    template <typename CtrlT>
    bool writeComplexProperty(long prop, double val, long flags);
    _ComPtr<IMFAttributes> getDefaultSourceConfig(UINT32 num = 10);
    bool initStream(DWORD streamID, const MediaType& mt);

    Media_Foundation& MF;
    cv::String filename;
    int camid;
    MSMFCapture_Mode captureMode;
#ifdef HAVE_MSMF_DXVA
    _ComPtr<ID3D11Device> D3DDev;
    _ComPtr<IMFDXGIDeviceManager> D3DMgr;
#endif
    _ComPtr<IMFSourceReader> videoFileSource;
    DWORD dwStreamIndex;
    MediaType nativeFormat;
    MediaType captureFormat;
    int outputFormat;
    bool convertFormat;
    MFTIME duration;
    LONGLONG frameStep;
    _ComPtr<IMFSample> videoSample;
    LONGLONG sampleTime;
    bool isOpen;
    _ComPtr<IMFSourceReaderCallback> readCallback;  // non-NULL for "live" streams (camera capture)
};

CvCapture_MSMF::CvCapture_MSMF():
    MF(Media_Foundation::getInstance()),
    filename(""),
    camid(-1),
    captureMode(MODE_SW),
#ifdef HAVE_MSMF_DXVA
    D3DDev(NULL),
    D3DMgr(NULL),
#endif
    videoFileSource(NULL),
    videoSample(NULL),
    outputFormat(CV_CAP_MODE_BGR),
    convertFormat(true),
    sampleTime(0),
    isOpen(false)
{
    configureHW(true);
}

CvCapture_MSMF::~CvCapture_MSMF()
{
    close();
    configureHW(false);
}

void CvCapture_MSMF::close()
{
    if (isOpen)
    {
        isOpen = false;
        videoSample.Release();
        videoFileSource.Release();
        camid = -1;
        filename.clear();
    }
    readCallback.Release();
}

bool CvCapture_MSMF::initStream(DWORD streamID, const MediaType& mt)
{
    CV_LOG_DEBUG(NULL, "Init stream " << streamID << " with MediaType " << mt);
    _ComPtr<IMFMediaType> mediaTypeOut = mt.createMediaType();
    if (FAILED(videoFileSource->SetStreamSelection((DWORD)MF_SOURCE_READER_ALL_STREAMS, false)))
    {
        CV_LOG_WARNING(NULL, "Failed to reset streams");
        return false;
    }
    if (FAILED(videoFileSource->SetStreamSelection(streamID, true)))
    {
        CV_LOG_WARNING(NULL, "Failed to select stream " << streamID);
        return false;
    }
    HRESULT hr = videoFileSource->SetCurrentMediaType(streamID, NULL, mediaTypeOut.Get());
    if (hr == MF_E_TOPO_CODEC_NOT_FOUND)
    {
        CV_LOG_WARNING(NULL, "Failed to set mediaType (stream " << streamID << ", " << mt << "(codec not found)");
        return false;
    }
    else if (hr == MF_E_INVALIDMEDIATYPE)
    {
        CV_LOG_WARNING(NULL, "Failed to set mediaType (stream " << streamID << ", " << mt << "(unsupported media type)");
        return false;
    }
    else if (FAILED(hr))
    {
        CV_LOG_WARNING(NULL, "Failed to set mediaType (stream " << streamID << ", " << mt << "(HRESULT " << hr << ")");
        return false;
    }
    captureFormat = mt;
    return true;
}

_ComPtr<IMFAttributes> CvCapture_MSMF::getDefaultSourceConfig(UINT32 num)
{
    CV_Assert(num > 0);
    _ComPtr<IMFAttributes> res;
    if (FAILED(MFCreateAttributes(&res, num)) ||
        FAILED(res->SetUINT32(MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, true)) ||
        FAILED(res->SetUINT32(MF_SOURCE_READER_DISABLE_DXVA, false)) ||
        FAILED(res->SetUINT32(MF_SOURCE_READER_ENABLE_VIDEO_PROCESSING, false)) ||
        FAILED(res->SetUINT32(MF_SOURCE_READER_ENABLE_ADVANCED_VIDEO_PROCESSING, true))
        )
    {
        CV_Error(CV_StsError, "Failed to create attributes");
    }
#ifdef HAVE_MSMF_DXVA
    if (D3DMgr)
    {
        if (FAILED(res->SetUnknown(MF_SOURCE_READER_D3D_MANAGER, D3DMgr.Get())))
        {
            CV_Error(CV_StsError, "Failed to create attributes");
        }
    }
#endif
    return res;
}

bool CvCapture_MSMF::configureHW(bool enable)
{
#ifdef HAVE_MSMF_DXVA
    if ((enable && D3DMgr && D3DDev) || (!enable && !D3DMgr && !D3DDev))
        return true;
    if (!pMFCreateDXGIDeviceManager_initialized)
        init_MFCreateDXGIDeviceManager();
    if (enable && !pMFCreateDXGIDeviceManager)
        return false;

    bool reopen = isOpen;
    int prevcam = camid;
    cv::String prevfile = filename;
    close();
    if (enable)
    {
        D3D_FEATURE_LEVEL levels[] = { D3D_FEATURE_LEVEL_11_1, D3D_FEATURE_LEVEL_11_0,
            D3D_FEATURE_LEVEL_10_1, D3D_FEATURE_LEVEL_10_0,
            D3D_FEATURE_LEVEL_9_3,  D3D_FEATURE_LEVEL_9_2, D3D_FEATURE_LEVEL_9_1 };
        if (SUCCEEDED(D3D11CreateDevice(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, D3D11_CREATE_DEVICE_BGRA_SUPPORT | D3D11_CREATE_DEVICE_VIDEO_SUPPORT,
            levels, sizeof(levels) / sizeof(*levels), D3D11_SDK_VERSION, &D3DDev, NULL, NULL)))
        {
            // NOTE: Getting ready for multi-threaded operation
            _ComPtr<ID3D11Multithread> D3DDevMT;
            UINT mgrRToken;
            if (SUCCEEDED(D3DDev->QueryInterface(IID_PPV_ARGS(&D3DDevMT))))
            {
                D3DDevMT->SetMultithreadProtected(TRUE);
                D3DDevMT.Release();
                if (SUCCEEDED(pMFCreateDXGIDeviceManager(&mgrRToken, &D3DMgr)))
                {
                    if (SUCCEEDED(D3DMgr->ResetDevice(D3DDev.Get(), mgrRToken)))
                    {
                        captureMode = MODE_HW;
                        return reopen ? (prevcam >= 0 ? open(prevcam) : open(prevfile.c_str())) : true;
                    }
                    D3DMgr.Release();
                }
            }
            D3DDev.Release();
        }
        return false;
    }
    else
    {
        if (D3DMgr)
            D3DMgr.Release();
        if (D3DDev)
            D3DDev.Release();
        captureMode = MODE_SW;
        return reopen ? (prevcam >= 0 ? open(prevcam) : open(prevfile.c_str())) : true;
    }
#else
    return !enable;
#endif
}

bool CvCapture_MSMF::configureOutput(MediaType newType, cv::uint32_t outFormat)
{
    FormatStorage formats;
    formats.read(videoFileSource.Get());
    std::pair<FormatStorage::MediaID, MediaType> bestMatch = formats.findBestVideoFormat(newType);
    if (bestMatch.second.isEmpty())
    {
        CV_LOG_DEBUG(NULL, "Can not find video stream with requested parameters");
        return false;
    }
    dwStreamIndex = bestMatch.first.stream;
    nativeFormat = bestMatch.second;
    MediaType newFormat = nativeFormat;
    if (convertFormat)
    {
        switch (outFormat)
        {
        case CV_CAP_MODE_BGR:
        case CV_CAP_MODE_RGB:
            newFormat.subType = captureMode == MODE_HW ? MFVideoFormat_RGB32 : MFVideoFormat_RGB24;
            newFormat.stride = (captureMode == MODE_HW ? 4 : 3) * newFormat.width;
            newFormat.sampleSize = newFormat.stride * newFormat.height;
            break;
        case CV_CAP_MODE_GRAY:
            newFormat.subType = MFVideoFormat_YUY2;
            newFormat.stride = newFormat.width;
            newFormat.sampleSize = newFormat.stride * newFormat.height * 3 / 2;
            break;
        case CV_CAP_MODE_YUYV:
            newFormat.subType = MFVideoFormat_YUY2;
            newFormat.stride = 2 * newFormat.width;
            newFormat.sampleSize = newFormat.stride * newFormat.height;
            break;
        default:
            return false;
        }
        newFormat.interlaceMode = MFVideoInterlace_Progressive;
        newFormat.isFixedSize = true;
        if (nativeFormat.subType == MFVideoFormat_MP43) //Unable to estimate FPS for MP43
            newFormat.frameRateNum = 0;
    }
    // we select native format first and then our requested format (related issue #12822)
    if (!newType.isEmpty()) // camera input
        initStream(dwStreamIndex, nativeFormat);
    return initStream(dwStreamIndex, newFormat);
}

bool CvCapture_MSMF::open(int index)
{
    close();
    if (index < 0)
        return false;
    DeviceList devices;
    UINT32 count = devices.read();
    if (count == 0 || static_cast<UINT32>(index) > count)
    {
        CV_LOG_DEBUG(NULL, "Device " << index << " not found (total " << count << " devices)");
        return false;
    }
    _ComPtr<IMFAttributes> attr = getDefaultSourceConfig();
    _ComPtr<IMFSourceReaderCallback> cb = new SourceReaderCB();
    attr->SetUnknown(MF_SOURCE_READER_ASYNC_CALLBACK, cb.Get());
    _ComPtr<IMFMediaSource> src = devices.activateSource(index);
    if (!src.Get() || FAILED(MFCreateSourceReaderFromMediaSource(src.Get(), attr.Get(), &videoFileSource)))
    {
        CV_LOG_DEBUG(NULL, "Failed to create source reader");
        return false;
    }

    isOpen = true;
    camid = index;
    readCallback = cb;
    duration = 0;
    if (configureOutput(MediaType::createDefault(), outputFormat))
    {
        frameStep = captureFormat.getFrameStep();
    }
    return isOpen;
}

bool CvCapture_MSMF::open(const cv::String& _filename)
{
    close();
    if (_filename.empty())
        return false;

    // Set source reader parameters
    _ComPtr<IMFAttributes> attr = getDefaultSourceConfig();
    cv::AutoBuffer<wchar_t> unicodeFileName(_filename.length() + 1);
    MultiByteToWideChar(CP_ACP, 0, _filename.c_str(), -1, unicodeFileName.data(), (int)_filename.length() + 1);
    if (SUCCEEDED(MFCreateSourceReaderFromURL(unicodeFileName.data(), attr.Get(), &videoFileSource)))
    {
        isOpen = true;
        sampleTime = 0;
        if (configureOutput(MediaType(), outputFormat))
        {
            frameStep = captureFormat.getFrameStep();
            filename = _filename;
            PROPVARIANT var;
            HRESULT hr;
            if (SUCCEEDED(hr = videoFileSource->GetPresentationAttribute((DWORD)MF_SOURCE_READER_MEDIASOURCE, MF_PD_DURATION, &var)) &&
                var.vt == VT_UI8)
            {
                duration = var.uhVal.QuadPart;
                PropVariantClear(&var);
            }
            else
                duration = 0;
        }
    }

    return isOpen;
}

bool CvCapture_MSMF::grabFrame()
{
    CV_TRACE_FUNCTION();
    if (readCallback)  // async "live" capture mode
    {
        HRESULT hr = 0;
        SourceReaderCB* reader = ((SourceReaderCB*)readCallback.Get());
        if (!reader->m_reader)
        {
            // Initiate capturing with async callback
            reader->m_reader = videoFileSource.Get();
            reader->m_dwStreamIndex = dwStreamIndex;
            if (FAILED(hr = videoFileSource->ReadSample(dwStreamIndex, 0, NULL, NULL, NULL, NULL)))
            {
                CV_LOG_ERROR(NULL, "videoio(MSMF): can't grab frame - initial async ReadSample() call failed: " << hr);
                reader->m_reader = NULL;
                return false;
            }
        }
        BOOL bEOS = false;
        if (FAILED(hr = reader->Wait(10000, videoSample, bEOS)))  // 10 sec
        {
            CV_LOG_WARNING(NULL, "videoio(MSMF): can't grab frame. Error: " << hr);
            return false;
        }
        if (bEOS)
        {
            CV_LOG_WARNING(NULL, "videoio(MSMF): EOS signal. Capture stream is lost");
            return false;
        }
        return true;
    }
    else if (isOpen)
    {
        DWORD streamIndex, flags;
        videoSample.Release();
        HRESULT hr;
        for(;;)
        {
            CV_TRACE_REGION("ReadSample");
            if (!SUCCEEDED(hr = videoFileSource->ReadSample(
                dwStreamIndex, // Stream index.
                0,             // Flags.
                &streamIndex,  // Receives the actual stream index.
                &flags,        // Receives status flags.
                &sampleTime,   // Receives the time stamp.
                &videoSample   // Receives the sample or NULL.
            )))
                break;
            if (streamIndex != dwStreamIndex)
                break;
            if (flags & (MF_SOURCE_READERF_ERROR | MF_SOURCE_READERF_ALLEFFECTSREMOVED | MF_SOURCE_READERF_ENDOFSTREAM))
                break;
            if (videoSample)
                break;
            if (flags & MF_SOURCE_READERF_STREAMTICK)
            {
                CV_LOG_DEBUG(NULL, "videoio(MSMF): Stream tick detected. Retrying to grab the frame");
            }
        }

        if (SUCCEEDED(hr))
        {
            if (streamIndex != dwStreamIndex)
            {
                CV_LOG_DEBUG(NULL, "videoio(MSMF): Wrong stream read. Abort capturing");
                close();
            }
            else if (flags & MF_SOURCE_READERF_ERROR)
            {
                CV_LOG_DEBUG(NULL, "videoio(MSMF): Stream reading error. Abort capturing");
                close();
            }
            else if (flags & MF_SOURCE_READERF_ALLEFFECTSREMOVED)
            {
                CV_LOG_DEBUG(NULL, "videoio(MSMF): Stream decoding error. Abort capturing");
                close();
            }
            else if (flags & MF_SOURCE_READERF_ENDOFSTREAM)
            {
                sampleTime += frameStep;
                CV_LOG_DEBUG(NULL, "videoio(MSMF): End of stream detected");
            }
            else
            {
                sampleTime += frameStep;
                if (flags & MF_SOURCE_READERF_NEWSTREAM)
                {
                    CV_LOG_DEBUG(NULL, "videoio(MSMF): New stream detected");
                }
                if (flags & MF_SOURCE_READERF_NATIVEMEDIATYPECHANGED)
                {
                    CV_LOG_DEBUG(NULL, "videoio(MSMF): Stream native media type changed");
                }
                if (flags & MF_SOURCE_READERF_CURRENTMEDIATYPECHANGED)
                {
                    CV_LOG_DEBUG(NULL, "videoio(MSMF): Stream current media type changed");
                }
                return true;
            }
        }
    }
    return false;
}

bool CvCapture_MSMF::retrieveFrame(int, cv::OutputArray frame)
{
    CV_TRACE_FUNCTION();
    do
    {
        if (!videoSample)
            break;

        _ComPtr<IMFMediaBuffer> buf = NULL;

        CV_TRACE_REGION("get_contiguous_buffer");
        if (!SUCCEEDED(videoSample->ConvertToContiguousBuffer(&buf)))
        {
            CV_TRACE_REGION("get_buffer");
            DWORD bcnt = 0;
            if (!SUCCEEDED(videoSample->GetBufferCount(&bcnt)))
                break;
            if (bcnt == 0)
                break;
            if (!SUCCEEDED(videoSample->GetBufferByIndex(0, &buf)))
                break;
        }

        bool lock2d = false;
        BYTE* ptr = NULL;
        LONG pitch = 0;
        DWORD maxsize = 0, cursize = 0;

        // "For 2-D buffers, the Lock2D method is more efficient than the Lock method"
        // see IMFMediaBuffer::Lock method documentation: https://msdn.microsoft.com/en-us/library/windows/desktop/bb970366(v=vs.85).aspx
        _ComPtr<IMF2DBuffer> buffer2d;
        if (convertFormat)
        {
            if (SUCCEEDED(buf.As<IMF2DBuffer>(buffer2d)))
            {
                CV_TRACE_REGION_NEXT("lock2d");
                if (SUCCEEDED(buffer2d->Lock2D(&ptr, &pitch)))
                {
                    lock2d = true;
                }
            }
        }
        if (ptr == NULL)
        {
            CV_Assert(lock2d == false);
            CV_TRACE_REGION_NEXT("lock");
            if (!SUCCEEDED(buf->Lock(&ptr, &maxsize, &cursize)))
            {
                break;
            }
        }
        if (!ptr)
            break;
        if (convertFormat)
        {
            if (lock2d || (unsigned int)cursize == captureFormat.sampleSize)
            {
                switch (outputFormat)
                {
                case CV_CAP_MODE_YUYV:
                    cv::Mat(captureFormat.height, captureFormat.width, CV_8UC2, ptr, pitch).copyTo(frame);
                    break;
                case CV_CAP_MODE_BGR:
                    if (captureMode == MODE_HW)
                        cv::cvtColor(cv::Mat(captureFormat.height, captureFormat.width, CV_8UC4, ptr, pitch), frame, cv::COLOR_BGRA2BGR);
                    else
                        cv::Mat(captureFormat.height, captureFormat.width, CV_8UC3, ptr, pitch).copyTo(frame);
                    break;
                case CV_CAP_MODE_RGB:
                    if (captureMode == MODE_HW)
                        cv::cvtColor(cv::Mat(captureFormat.height, captureFormat.width, CV_8UC4, ptr, pitch), frame, cv::COLOR_BGRA2BGR);
                    else
                        cv::cvtColor(cv::Mat(captureFormat.height, captureFormat.width, CV_8UC3, ptr, pitch), frame, cv::COLOR_BGR2RGB);
                    break;
                case CV_CAP_MODE_GRAY:
                    cv::Mat(captureFormat.height, captureFormat.width, CV_8UC1, ptr, pitch).copyTo(frame);
                    break;
                default:
                    frame.release();
                    break;
                }
            }
            else
                frame.release();
        }
        else
        {
            cv::Mat(1, cursize, CV_8UC1, ptr, pitch).copyTo(frame);
        }
        CV_TRACE_REGION_NEXT("unlock");
        if (lock2d)
            buffer2d->Unlock2D();
        else
            buf->Unlock();
        return !frame.empty();
    } while (0);

    frame.release();
    return false;
}

bool CvCapture_MSMF::setTime(double time, bool rough)
{
    PROPVARIANT var;
    if (SUCCEEDED(videoFileSource->GetPresentationAttribute((DWORD)MF_SOURCE_READER_MEDIASOURCE, MF_SOURCE_READER_MEDIASOURCE_CHARACTERISTICS, &var)) &&
        var.vt == VT_UI4 && var.ulVal & MFMEDIASOURCE_CAN_SEEK)
    {
        videoSample.Release();
        bool useGrabbing = time > 0 && !rough && !(var.ulVal & MFMEDIASOURCE_HAS_SLOW_SEEK);
        PropVariantClear(&var);
        sampleTime = (useGrabbing && time >= frameStep) ? (LONGLONG)floor(time + 0.5) - frameStep : (LONGLONG)floor(time + 0.5);
        var.vt = VT_I8;
        var.hVal.QuadPart = sampleTime;
        bool resOK = SUCCEEDED(videoFileSource->SetCurrentPosition(GUID_NULL, var));
        PropVariantClear(&var);
        if (resOK && useGrabbing)
        {
            LONGLONG timeborder = (LONGLONG)floor(time + 0.5) - frameStep / 2;
            do { resOK = grabFrame(); videoSample.Release(); } while (resOK && sampleTime < timeborder);
        }
        return resOK;
    }
    return false;
}

template <typename CtrlT>
bool CvCapture_MSMF::readComplexPropery(long prop, long & val) const
{
    _ComPtr<CtrlT> ctrl;
    if (FAILED(videoFileSource->GetServiceForStream((DWORD)MF_SOURCE_READER_MEDIASOURCE, GUID_NULL, IID_PPV_ARGS(&ctrl))))
    {
        CV_LOG_DEBUG(NULL, "Failed to get service for stream");
        return false;
    }
    long paramVal, paramFlag;
    if (FAILED(ctrl->Get(prop, &paramVal, &paramFlag)))
    {
        CV_LOG_DEBUG(NULL, "Failed to get property " << prop);
        // we continue
    }
    // fallback - get default value
    long minVal, maxVal, stepVal;
    if (FAILED(ctrl->GetRange(prop, &minVal, &maxVal, &stepVal, &paramVal, &paramFlag)))
    {
        CV_LOG_DEBUG(NULL, "Failed to get default value for property " << prop);
        return false;
    }
    val = paramVal;
    return true;
}

double CvCapture_MSMF::getProperty( int property_id ) const
{
    long cVal = 0;
    if (isOpen)
        switch (property_id)
        {
        case CV_CAP_PROP_FORMAT:
                return outputFormat;
        case CV_CAP_PROP_MODE:
                return captureMode;
        case CV_CAP_PROP_CONVERT_RGB:
                return convertFormat ? 1 : 0;
        case CV_CAP_PROP_SAR_NUM:
                return captureFormat.aspectRatioNum;
        case CV_CAP_PROP_SAR_DEN:
                return captureFormat.aspectRatioDenom;
        case CV_CAP_PROP_FRAME_WIDTH:
            return captureFormat.width;
        case CV_CAP_PROP_FRAME_HEIGHT:
            return captureFormat.height;
        case CV_CAP_PROP_FOURCC:
            return captureFormat.subType.Data1;
        case CV_CAP_PROP_FPS:
            return captureFormat.getFramerate();
        case CV_CAP_PROP_FRAME_COUNT:
            if (duration != 0)
                return floor(((double)duration / 1e7)* captureFormat.getFramerate() + 0.5);
            else
                break;
        case CV_CAP_PROP_POS_FRAMES:
            return floor(((double)sampleTime / 1e7)* captureFormat.getFramerate() + 0.5);
        case CV_CAP_PROP_POS_MSEC:
            return (double)sampleTime / 1e4;
        case CV_CAP_PROP_POS_AVI_RATIO:
            if (duration != 0)
                return (double)sampleTime / duration;
            else
                break;
        case CV_CAP_PROP_BRIGHTNESS:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_Brightness, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_CONTRAST:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_Contrast, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_SATURATION:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_Saturation, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_HUE:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_Hue, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_GAIN:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_Gain, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_SHARPNESS:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_Sharpness, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_GAMMA:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_Gamma, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_BACKLIGHT:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_BacklightCompensation, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_MONOCHROME:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_ColorEnable, cVal))
                return cVal == 0 ? 1 : 0;
            break;
        case CV_CAP_PROP_TEMPERATURE:
            if (readComplexPropery<IAMVideoProcAmp>(VideoProcAmp_WhiteBalance, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_PAN:
            if (readComplexPropery<IAMCameraControl>(CameraControl_Pan, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_TILT:
            if (readComplexPropery<IAMCameraControl>(CameraControl_Tilt, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_ROLL:
            if (readComplexPropery<IAMCameraControl>(CameraControl_Roll, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_IRIS:
            if (readComplexPropery<IAMCameraControl>(CameraControl_Iris, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_EXPOSURE:
        case CV_CAP_PROP_AUTO_EXPOSURE:
            if (readComplexPropery<IAMCameraControl>(CameraControl_Exposure, cVal))
            {
                if (property_id == CV_CAP_PROP_EXPOSURE)
                    return cVal;
                else
                    return cVal == VideoProcAmp_Flags_Auto;
            }
            break;
        case CV_CAP_PROP_ZOOM:
            if (readComplexPropery<IAMCameraControl>(CameraControl_Zoom, cVal))
                return cVal;
            break;
        case CV_CAP_PROP_FOCUS:
        case CV_CAP_PROP_AUTOFOCUS:
            if (readComplexPropery<IAMCameraControl>(CameraControl_Focus, cVal))
            {
                if (property_id == CV_CAP_PROP_FOCUS)
                    return cVal;
                else
                    return cVal == VideoProcAmp_Flags_Auto;
            }
            break;
        case CV_CAP_PROP_WHITE_BALANCE_BLUE_U:
        case CV_CAP_PROP_WHITE_BALANCE_RED_V:
        case CV_CAP_PROP_RECTIFICATION:
        case CV_CAP_PROP_TRIGGER:
        case CV_CAP_PROP_TRIGGER_DELAY:
        case CV_CAP_PROP_GUID:
        case CV_CAP_PROP_ISO_SPEED:
        case CV_CAP_PROP_SETTINGS:
        case CV_CAP_PROP_BUFFERSIZE:
        default:
            break;
        }
    return -1;
}

template <typename CtrlT>
bool CvCapture_MSMF::writeComplexProperty(long prop, double val, long flags)
{
    _ComPtr<CtrlT> ctrl;
    if (FAILED(videoFileSource->GetServiceForStream((DWORD)MF_SOURCE_READER_MEDIASOURCE, GUID_NULL, IID_PPV_ARGS(&ctrl))))
    {
        CV_LOG_DEBUG(NULL, "Failed get service for stream");
        return false;
    }
    if (FAILED(ctrl->Set(prop, (long)val, flags)))
    {
        CV_LOG_DEBUG(NULL, "Failed to set property " << prop);
        return false;
    }
    return true;
}

bool CvCapture_MSMF::setProperty( int property_id, double value )
{
    MediaType newFormat = captureFormat;
    if (isOpen)
        switch (property_id)
        {
        case CV_CAP_PROP_MODE:
            switch ((MSMFCapture_Mode)((int)value))
            {
            case MODE_SW:
                return configureHW(false);
            case MODE_HW:
                return configureHW(true);
            default:
                return false;
            }
        case CV_CAP_PROP_FORMAT:
            return configureOutput(newFormat, (int)cvRound(value));
        case CV_CAP_PROP_CONVERT_RGB:
            convertFormat = (value != 0);
            return configureOutput(newFormat, outputFormat);
        case CV_CAP_PROP_SAR_NUM:
            if (value > 0)
            {
                newFormat.aspectRatioNum = (UINT32)cvRound(value);
                return configureOutput(newFormat, outputFormat);
            }
            break;
        case CV_CAP_PROP_SAR_DEN:
            if (value > 0)
            {
                newFormat.aspectRatioDenom = (UINT32)cvRound(value);
                return configureOutput(newFormat, outputFormat);
            }
            break;
        case CV_CAP_PROP_FRAME_WIDTH:
            if (value >= 0)
            {
                newFormat.width = (UINT32)cvRound(value);
                return configureOutput(newFormat, outputFormat);
            }
            break;
        case CV_CAP_PROP_FRAME_HEIGHT:
            if (value >= 0)
            {
                newFormat.height = (UINT32)cvRound(value);
                return configureOutput(newFormat, outputFormat);
            }
            break;
        case CV_CAP_PROP_FPS:
            if (value >= 0)
            {
                newFormat.setFramerate(value);
                return configureOutput(newFormat, outputFormat);
            }
            break;
            case CV_CAP_PROP_FOURCC:
                break;
        case CV_CAP_PROP_FRAME_COUNT:
            break;
        case CV_CAP_PROP_POS_AVI_RATIO:
            if (duration != 0)
                return setTime(duration * value, true);
            break;
        case CV_CAP_PROP_POS_FRAMES:
            if (std::fabs(captureFormat.getFramerate()) > 0)
                return setTime(value  * 1e7 / captureFormat.getFramerate(), false);
            break;
        case CV_CAP_PROP_POS_MSEC:
                return setTime(value  * 1e4, false);
        case CV_CAP_PROP_BRIGHTNESS:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_Brightness, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_CONTRAST:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_Contrast, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_SATURATION:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_Saturation, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_HUE:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_Hue, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_GAIN:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_Gain, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_SHARPNESS:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_Sharpness, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_GAMMA:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_Gamma, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_BACKLIGHT:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_BacklightCompensation, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_MONOCHROME:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_ColorEnable, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_TEMPERATURE:
            return writeComplexProperty<IAMVideoProcAmp>(VideoProcAmp_WhiteBalance, value, VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_PAN:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Pan, value, CameraControl_Flags_Manual);
        case CV_CAP_PROP_TILT:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Tilt, value, CameraControl_Flags_Manual);
        case CV_CAP_PROP_ROLL:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Roll, value, CameraControl_Flags_Manual);
        case CV_CAP_PROP_IRIS:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Iris, value, CameraControl_Flags_Manual);
        case CV_CAP_PROP_EXPOSURE:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Exposure, value, CameraControl_Flags_Manual);
        case CV_CAP_PROP_AUTO_EXPOSURE:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Exposure, value, value != 0 ? VideoProcAmp_Flags_Auto : VideoProcAmp_Flags_Manual);
        case CV_CAP_PROP_ZOOM:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Zoom, value, CameraControl_Flags_Manual);
        case CV_CAP_PROP_FOCUS:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Focus, value, CameraControl_Flags_Manual);
        case CV_CAP_PROP_AUTOFOCUS:
            return writeComplexProperty<IAMCameraControl>(CameraControl_Focus, value, value != 0 ? CameraControl_Flags_Auto : CameraControl_Flags_Manual);
        case CV_CAP_PROP_WHITE_BALANCE_BLUE_U:
        case CV_CAP_PROP_WHITE_BALANCE_RED_V:
        case CV_CAP_PROP_RECTIFICATION:
        case CV_CAP_PROP_TRIGGER:
        case CV_CAP_PROP_TRIGGER_DELAY:
        case CV_CAP_PROP_GUID:
        case CV_CAP_PROP_ISO_SPEED:
        case CV_CAP_PROP_SETTINGS:
        case CV_CAP_PROP_BUFFERSIZE:
        default:
            break;
        }
    return false;
}

cv::Ptr<cv::IVideoCapture> cv::cvCreateCapture_MSMF( int index )
{
    cv::Ptr<CvCapture_MSMF> capture = cv::makePtr<CvCapture_MSMF>();
    if (capture)
    {
        capture->open(index);
        if (capture->isOpened())
            return capture;
    }
    return cv::Ptr<cv::IVideoCapture>();
}

cv::Ptr<cv::IVideoCapture> cv::cvCreateCapture_MSMF (const cv::String& filename)
{
    cv::Ptr<CvCapture_MSMF> capture = cv::makePtr<CvCapture_MSMF>();
    if (capture)
    {
        capture->open(filename);
        if (capture->isOpened())
            return capture;
    }
    return cv::Ptr<cv::IVideoCapture>();
}

//
//
// Media Foundation-based Video Writer
//
//

class CvVideoWriter_MSMF : public cv::IVideoWriter
{
public:
    CvVideoWriter_MSMF();
    virtual ~CvVideoWriter_MSMF();
    virtual bool open(const cv::String& filename, int fourcc,
                      double fps, cv::Size frameSize, bool isColor);
    virtual void close();
    virtual void write(cv::InputArray);

    virtual double getProperty(int) const { return 0; }
    virtual bool setProperty(int, double) { return false; }
    virtual bool isOpened() const { return initiated; }

    int getCaptureDomain() const CV_OVERRIDE { return cv::CAP_MSMF; }
private:
    Media_Foundation& MF;
    UINT32 videoWidth;
    UINT32 videoHeight;
    double fps;
    UINT32 bitRate;
    UINT32 frameSize;
    GUID   encodingFormat;
    GUID   inputFormat;

    DWORD  streamIndex;
    _ComPtr<IMFSinkWriter> sinkWriter;

    bool   initiated;

    LONGLONG rtStart;
    UINT64 rtDuration;

    static const GUID FourCC2GUID(int fourcc);
};

CvVideoWriter_MSMF::CvVideoWriter_MSMF():
    MF(Media_Foundation::getInstance()),
    videoWidth(0),
    videoHeight(0),
    fps(0),
    bitRate(0),
    frameSize(0),
    encodingFormat(),
    inputFormat(),
    streamIndex(0),
    initiated(false),
    rtStart(0),
    rtDuration(0)
{
}

CvVideoWriter_MSMF::~CvVideoWriter_MSMF()
{
    close();
}

const GUID CvVideoWriter_MSMF::FourCC2GUID(int fourcc)
{
    switch(fourcc)
    {
        case CV_FOURCC_MACRO('d', 'v', '2', '5'):
            return MFVideoFormat_DV25; break;
        case CV_FOURCC_MACRO('d', 'v', '5', '0'):
            return MFVideoFormat_DV50; break;
        case CV_FOURCC_MACRO('d', 'v', 'c', ' '):
            return MFVideoFormat_DVC; break;
        case CV_FOURCC_MACRO('d', 'v', 'h', '1'):
            return MFVideoFormat_DVH1; break;
        case CV_FOURCC_MACRO('d', 'v', 'h', 'd'):
            return MFVideoFormat_DVHD; break;
        case CV_FOURCC_MACRO('d', 'v', 's', 'd'):
            return MFVideoFormat_DVSD; break;
        case CV_FOURCC_MACRO('d', 'v', 's', 'l'):
                return MFVideoFormat_DVSL; break;
#if (WINVER >= 0x0602)
        case CV_FOURCC_MACRO('H', '2', '6', '3'):   // Available only for Win 8 target.
                return MFVideoFormat_H263; break;
#endif
        case CV_FOURCC_MACRO('H', '2', '6', '4'):
                return MFVideoFormat_H264; break;
        case CV_FOURCC_MACRO('M', '4', 'S', '2'):
                return MFVideoFormat_M4S2; break;
        case CV_FOURCC_MACRO('M', 'J', 'P', 'G'):
                return MFVideoFormat_MJPG; break;
        case CV_FOURCC_MACRO('M', 'P', '4', '3'):
                return MFVideoFormat_MP43; break;
        case CV_FOURCC_MACRO('M', 'P', '4', 'S'):
                return MFVideoFormat_MP4S; break;
        case CV_FOURCC_MACRO('M', 'P', '4', 'V'):
                return MFVideoFormat_MP4V; break;
        case CV_FOURCC_MACRO('M', 'P', 'G', '1'):
                return MFVideoFormat_MPG1; break;
        case CV_FOURCC_MACRO('M', 'S', 'S', '1'):
                return MFVideoFormat_MSS1; break;
        case CV_FOURCC_MACRO('M', 'S', 'S', '2'):
                return MFVideoFormat_MSS2; break;
        case CV_FOURCC_MACRO('W', 'M', 'V', '1'):
                return MFVideoFormat_WMV1; break;
        case CV_FOURCC_MACRO('W', 'M', 'V', '2'):
                return MFVideoFormat_WMV2; break;
        case CV_FOURCC_MACRO('W', 'M', 'V', '3'):
                return MFVideoFormat_WMV3; break;
        case CV_FOURCC_MACRO('W', 'V', 'C', '1'):
                return MFVideoFormat_WVC1; break;
        default:
            return MFVideoFormat_H264;
    }
}

bool CvVideoWriter_MSMF::open( const cv::String& filename, int fourcc,
                               double _fps, cv::Size _frameSize, bool /*isColor*/ )
{
    if (initiated)
        close();
    videoWidth = _frameSize.width;
    videoHeight = _frameSize.height;
    fps = _fps;
    bitRate = (UINT32)fps*videoWidth*videoHeight; // 1-bit per pixel
    encodingFormat = FourCC2GUID(fourcc);
    inputFormat = MFVideoFormat_RGB32;

    _ComPtr<IMFMediaType>  mediaTypeOut;
    _ComPtr<IMFMediaType>  mediaTypeIn;
    _ComPtr<IMFAttributes> spAttr;
    if (// Set the output media type.
        SUCCEEDED(MFCreateMediaType(&mediaTypeOut)) &&
        SUCCEEDED(mediaTypeOut->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video)) &&
        SUCCEEDED(mediaTypeOut->SetGUID(MF_MT_SUBTYPE, encodingFormat)) &&
        SUCCEEDED(mediaTypeOut->SetUINT32(MF_MT_AVG_BITRATE, bitRate)) &&
        SUCCEEDED(mediaTypeOut->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive)) &&
        SUCCEEDED(MFSetAttributeSize(mediaTypeOut.Get(), MF_MT_FRAME_SIZE, videoWidth, videoHeight)) &&
        SUCCEEDED(MFSetAttributeRatio(mediaTypeOut.Get(), MF_MT_FRAME_RATE, (UINT32)(fps * 1000), 1000)) &&
        SUCCEEDED(MFSetAttributeRatio(mediaTypeOut.Get(), MF_MT_PIXEL_ASPECT_RATIO, 1, 1)) &&
        // Set the input media type.
        SUCCEEDED(MFCreateMediaType(&mediaTypeIn)) &&
        SUCCEEDED(mediaTypeIn->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video)) &&
        SUCCEEDED(mediaTypeIn->SetGUID(MF_MT_SUBTYPE, inputFormat)) &&
        SUCCEEDED(mediaTypeIn->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive)) &&
        SUCCEEDED(mediaTypeIn->SetUINT32(MF_MT_DEFAULT_STRIDE, 4 * videoWidth)) && //Assume BGR32 input
        SUCCEEDED(MFSetAttributeSize(mediaTypeIn.Get(), MF_MT_FRAME_SIZE, videoWidth, videoHeight)) &&
        SUCCEEDED(MFSetAttributeRatio(mediaTypeIn.Get(), MF_MT_FRAME_RATE, (UINT32)(fps * 1000), 1000)) &&
        SUCCEEDED(MFSetAttributeRatio(mediaTypeIn.Get(), MF_MT_PIXEL_ASPECT_RATIO, 1, 1)) &&
        // Set sink writer parameters
        SUCCEEDED(MFCreateAttributes(&spAttr, 10)) &&
        SUCCEEDED(spAttr->SetUINT32(MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, true)) &&
        SUCCEEDED(spAttr->SetUINT32(MF_SINK_WRITER_DISABLE_THROTTLING, true))
        )
    {
        // Create the sink writer
        cv::AutoBuffer<wchar_t> unicodeFileName(filename.length() + 1);
        MultiByteToWideChar(CP_ACP, 0, filename.c_str(), -1, unicodeFileName.data(), (int)filename.length() + 1);
        HRESULT hr = MFCreateSinkWriterFromURL(unicodeFileName.data(), NULL, spAttr.Get(), &sinkWriter);
        if (SUCCEEDED(hr))
        {
            // Configure the sink writer and tell it start to start accepting data
            if (SUCCEEDED(sinkWriter->AddStream(mediaTypeOut.Get(), &streamIndex)) &&
                SUCCEEDED(sinkWriter->SetInputMediaType(streamIndex, mediaTypeIn.Get(), NULL)) &&
                SUCCEEDED(sinkWriter->BeginWriting()))
            {
                initiated = true;
                rtStart = 0;
                MFFrameRateToAverageTimePerFrame((UINT32)(fps * 1000), 1000, &rtDuration);
                return true;
            }
        }
    }

    return false;
}

void CvVideoWriter_MSMF::close()
{
    if (initiated)
    {
        initiated = false;
        sinkWriter->Finalize();
        sinkWriter.Release();
    }
}

void CvVideoWriter_MSMF::write(cv::InputArray img)
{
    if (img.empty() ||
        (img.channels() != 1 && img.channels() != 3 && img.channels() != 4) ||
        (UINT32)img.cols() != videoWidth || (UINT32)img.rows() != videoHeight)
        return;

    const LONG cbWidth = 4 * videoWidth;
    const DWORD cbBuffer = cbWidth * videoHeight;
    _ComPtr<IMFSample> sample;
    _ComPtr<IMFMediaBuffer> buffer;
    BYTE *pData = NULL;
    // Prepare a media sample.
    if (SUCCEEDED(MFCreateSample(&sample)) &&
        // Set sample time stamp and duration.
        SUCCEEDED(sample->SetSampleTime(rtStart)) &&
        SUCCEEDED(sample->SetSampleDuration(rtDuration)) &&
        // Create a memory buffer.
        SUCCEEDED(MFCreateMemoryBuffer(cbBuffer, &buffer)) &&
        // Set the data length of the buffer.
        SUCCEEDED(buffer->SetCurrentLength(cbBuffer)) &&
        // Add the buffer to the sample.
        SUCCEEDED(sample->AddBuffer(buffer.Get())) &&
        // Lock the buffer.
        SUCCEEDED(buffer->Lock(&pData, NULL, NULL)))
    {
        // Copy the video frame to the buffer.
        cv::cvtColor(img.getMat(), cv::Mat(videoHeight, videoWidth, CV_8UC4, pData, cbWidth), img.channels() > 1 ? cv::COLOR_BGR2BGRA : cv::COLOR_GRAY2BGRA);
        buffer->Unlock();
        // Send media sample to the Sink Writer.
        if (SUCCEEDED(sinkWriter->WriteSample(streamIndex, sample.Get())))
        {
            rtStart += rtDuration;
        }
    }
}

cv::Ptr<cv::IVideoWriter> cv::cvCreateVideoWriter_MSMF( const cv::String& filename, int fourcc,
                                                        double fps, cv::Size frameSize, int isColor )
{
    cv::Ptr<CvVideoWriter_MSMF> writer = cv::makePtr<CvVideoWriter_MSMF>();
    if (writer)
    {
        writer->open(filename, fourcc, fps, frameSize, isColor != 0);
        if (writer->isOpened())
            return writer;
    }
    return cv::Ptr<cv::IVideoWriter>();
}

#endif