#include </usr/include/opencv/cv.h>

#include </usr/include/opencv/highgui.h>

#include </usr/include/opencv/cxcore.h>

#include "stdio.h"

#include "string.h"

#define imageHeight_default 240

#define imageWidth_default 320

int main(int argc, char ** argv)

{

        CvCapture * pCapture_R;

        IplImage *pFrame_R;

        int imageWidth = imageWidth_default;

        int imageHeight = imageHeight_default;

        pCapture_R = cvCaptureFromCAM (0);

        int numOfCycles = 0;

        while (1)

        {

                int count = 0;

                printf("Capturing frames\n");

                while (count < 10)

                {

                        pFrame_R = cvQueryFrame( pCapture_R );

                        if( !pFrame_R ) fprintf(stderr, "failed to get a frame R\n");

                        int key = cvWaitKey(500);

                        count++;

                }

                printf("Done capturing frames\n");

                //calculating new resolution

                //following code changes the resulotion back and forth between 160x120 and 320x240

                if(imageHeight == 240)

                {

                        imageHeight /= 2;

                        imageWidth /= 2;

                        printf("New resolution: %dx%d\n", imageWidth, imageHeight );

                }

                else

                {

                        imageWidth *= 2;

                        imageHeight *= 2;

                        printf("New resolution: %dx%d\n", imageWidth, imageHeight );

                }

                //Changing resolution

                printf("changing resolution\n");

                cvSetCaptureProperty(pCapture_R, CV_CAP_PROP_FRAME_WIDTH, imageWidth );

                cvSetCaptureProperty(pCapture_R, CV_CAP_PROP_FRAME_HEIGHT, imageHeight );

                sleep(1);

        }

        return 0;

}