opencv/modules/videoio/src/cap_winrt_video.hpp

// Video support with XAML

// Copyright (c) Microsoft Open Technologies, Inc.
// All rights reserved.
//
// (3 - clause BSD License)
//
// 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
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// POSSIBILITY OF SUCH DAMAGE.

#pragma once

#include "cap_winrt/CaptureFrameGrabber.hpp"

#include <mutex>
#include <memory>

class Video {
public:

    // non-blocking
    bool initGrabber(int device, int w, int h);
    void closeGrabber();
    bool isStarted();

    // singleton
    static Video &getInstance();

    void CopyOutput();

private:
    // singleton
    Video();

    void _GrabFrameAsync(::Media::CaptureFrameGrabber^ frameGrabber);

    bool listDevices();

    Platform::Agile<Windows::Media::Capture::MediaCapture> m_capture;
    Platform::Agile<Windows::Devices::Enumeration::DeviceInformationCollection> m_devices;

    ::Media::CaptureFrameGrabber^ m_frameGrabber;

    bool listDevicesTask();

    bool					bChooseDevice;
    bool 					bVerbose;
    bool                    bFlipImageX;
    //std::atomic<bool>       bGrabberInited;
    int						m_deviceID;
    int						attemptFramerate;
    std::atomic<bool>       bIsFrameNew;
    std::atomic<bool>       bGrabberInited;
    std::atomic<bool>       bGrabberInitInProgress;
    unsigned int			width, height;
    int                     bytesPerPixel;

};