/************************************************************************/
/* qt-opencv-multithreaded:                                             */
/* A multithreaded OpenCV application using the Qt framework.           */
/*                                                                      */
/* ImageBuffer.h                                                        */
/*                                                                      */
/* Nick D'Ademo <nickdademo@gmail.com>                                  */
/*                                                                      */
/* Copyright (c) 2012 Nick D'Ademo                                      */
/*                                                                      */
/* Permission is hereby granted, free of charge, to any person          */
/* obtaining a copy of this software and associated documentation       */
/* files (the "Software"), to deal in the Software without restriction, */
/* including without limitation the rights to use, copy, modify, merge, */
/* publish, distribute, sublicense, and/or sell copies of the Software, */
/* and to permit persons to whom the Software is furnished to do so,    */
/* subject to the following conditions:                                 */
/*                                                                      */
/* The above copyright notice and this permission notice shall be       */
/* included in all copies or substantial portions of the Software.      */
/*                                                                      */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,      */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF   */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND                */
/* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS  */
/* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN   */
/* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN    */
/* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE     */
/* SOFTWARE.                                                            */
/*                                                                      */
/************************************************************************/

#ifndef IMAGEBUFFER_H
#define IMAGEBUFFER_H

// Qt header files
#include <QMutex>
#include <QQueue>
#include <QSemaphore>
// OpenCV header files
#include <opencv2/highgui.hpp>


using namespace cv;

class ImageBuffer
{

public:
    ImageBuffer(int size, bool dropFrame);
    void addFrame(const Mat& frame);
    Mat getFrame();
    void clearBuffer();
    int getSizeOfImageBuffer();
private:
    QMutex imageQueueProtect;
    QQueue<Mat> imageQueue;
    QSemaphore *freeSlots;
    QSemaphore *usedSlots;
    QSemaphore *clearBuffer1;
    QSemaphore *clearBuffer2;
    int bufferSize;
    bool dropFrame;
};

#endif // IMAGEBUFFER_H