AIParkingApplication/AIParkingApplication/Camera.cs

using OpenCvSharp;
using System.Threading;

namespace AIParkingApplication
{
    public delegate void CameraEvent(Mat videoFrame);
    public class Camera
    {
        private string streamUrl;
        private bool isCapturing;
        private object lockSyncObject;
        private volatile bool isFrameRequested;

        public event CameraEvent OnVideoFrameReceived;
        public event CameraEvent OnOneVideoFrameRequested;

        public Camera(string streamUrl)
        {
            this.streamUrl = streamUrl;
            isCapturing = true;
            isFrameRequested = false;
            lockSyncObject = new object();
        }

        public void Startcapture()
        {
            Thread readVideoStreamThread = new Thread(new ThreadStart(ReadVideoStream));
            readVideoStreamThread.IsBackground = true;
            readVideoStreamThread.Start();
        }

        public void RequestCaptureOneFrame()
        {
            isFrameRequested = true;
        }

        public void ReadVideoStream()
        {
            VideoCapture videoCapture = new VideoCapture();
            Mat videoFrame = new Mat();
            if (!videoCapture.Open(streamUrl))
            {
                return;
            }

            while (true)
            {
                Thread.Sleep(50);     //Stream Thread Sleep
                //Thread.Sleep(40);     //Video Thread Sleep
                if (!isCapturing)
                {
                    continue;
                }

                if (videoCapture.Read(videoFrame) && videoFrame.Width > 0 && videoFrame.Height > 0)
                {
                    OnVideoFrameReceived?.Invoke(videoFrame);
                    if (isFrameRequested)
                    {
                        OnOneVideoFrameRequested?.Invoke(videoFrame);
                        isFrameRequested = false;
                    }
                }
            }
        }

        public void PauseCapture()
        {
            lock (lockSyncObject)
            {
                isCapturing = false;
            }
        }
    }
}