tooll3--t3/Core/Video/VideoCaptureThread.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace T3.Core.Video
{
    public sealed class VideoFrameReceivedEventArgs : EventArgs
    {
        private VideoFrame frame;

        public VideoFrame Frame => this.frame;

        public VideoFrameReceivedEventArgs(VideoFrame frame)
        {
            this.frame = frame;
        }
    }

    public abstract class VideoCaptureThread
    {
        private Thread captureThread;
        private bool isRunning;
        public int ThreadSleepTime = 1;

        public EventHandler<VideoFrameReceivedEventArgs> FrameReceived;

        public void Start()
        {
            if (this.isRunning)
                return;

            this.isRunning = true;
            this.Configure();
            this.captureThread = new Thread(new ThreadStart(this.Run));
            this.captureThread.Start();
        }

        public void Stop()
        {
            if (!this.isRunning)
                return;

            this.captureThread.Join();
            this.isRunning = false;
        }

        private void Run()
        {
            while (this.isRunning)
            {
                VideoFrame? frame = this.Capture();

                if (frame.HasValue)
                {
                    if (this.FrameReceived != null)
                    {
                        this.FrameReceived(this, new VideoFrameReceivedEventArgs(frame.Value));
                    }
                }
                else
                {
                    if (this.ThreadSleepTime > 0)
                        Thread.Sleep(this.ThreadSleepTime);
                }
            }
        }

        protected abstract void Configure();
        protected abstract VideoFrame? Capture();

        public void Dispose()
        {
            this.Stop();
        }
    }
}