robospot-camera-finder/StreamViewer.cs

using LibVLCSharp.Shared;
using System.Net;

namespace robospot_camera_finder
{
    public partial class StreamViewer : Form
    {
        public LibVLC _libVLC;
        public MediaPlayer _mp;

        string cam_ip = "";

        int max_zoom_pulse = 9999;
        int min_zoom_pulse = 10;

        bool zoomTestSeqFlag = false;

        public StreamViewer(string name, string ip, MainForm.Camera camera, MainForm mainForm)
        {
            InitializeComponent();

            _libVLC = new LibVLC();
            _mp = new MediaPlayer(_libVLC);

            cam_ip = ip;
            this.Text = name;

            string rtsp_link = "rtsp://" + ip + "/profile2/media.smp";

            updateZoomSlider();

            tbRtspLink.Text = rtsp_link;

            videoView.MediaPlayer = _mp;
            var media = new Media(_libVLC, new Uri(rtsp_link));
            media.AddOption(":network-caching=25");
            _mp.Play(media);
            media.Dispose();
        }

        private void updateZoomSlider()
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://" + cam_ip + "/stw-cgi/ptzcontrol.cgi?msubmenu=query&action=view&Query=Zoom");
            request.Credentials = new NetworkCredential(MainForm.cam_username, MainForm.cam_password);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            string text;
            using (var sr = new StreamReader(response.GetResponseStream())) { text = sr.ReadToEnd(); }
            string[] resp_lines = text.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
            string zoom_value = resp_lines[1].Substring(resp_lines[1].LastIndexOf('=') + 1);
            tbZoom.Value = int.Parse(zoom_value);

        }

        private void sendZoomValue(string zoom_pulse)
        {
            // clamp values to allowed range
            if (int.Parse(zoom_pulse) < min_zoom_pulse)
            {
                zoom_pulse = min_zoom_pulse.ToString();
            }
            if (int.Parse(zoom_pulse) > max_zoom_pulse)
            {
                zoom_pulse = max_zoom_pulse.ToString();
            }

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://" + cam_ip + "/stw-cgi/ptzcontrol.cgi?msubmenu=absolute&action=control&ZoomPulse=" + zoom_pulse);
            request.Credentials = new NetworkCredential(MainForm.cam_username, MainForm.cam_password);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        }


        private void sendZoomValueManual(string zoom_value)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://" + cam_ip + "/stw-cgi/ptzcontrol.cgi?msubmenu=continuous&NormalizedSpeed=True&action=control&Channel=0&Zoom=" + zoom_value);
            request.Credentials = new NetworkCredential(MainForm.cam_username, MainForm.cam_password);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        }

        private void StreamViewer_FormClosed(object sender, FormClosedEventArgs e)
        {
            _mp.Stop();
            _mp.Dispose();
            _libVLC.Dispose();
        }

        private void tbZoom_KeyUp(object sender, KeyEventArgs e)
        {
            sendZoomValue(tbZoom.Value.ToString());
        }

        private void tbZoom_MouseUp(object sender, MouseEventArgs e)
        {
            sendZoomValue(tbZoom.Value.ToString());
        }

        private void timerUpdateZoom_Tick(object sender, EventArgs e)
        {
            updateZoomSlider();
        }

        private void btnZoomMax_Click(object sender, EventArgs e)
        {
            tbZoom.Value = max_zoom_pulse;
            sendZoomValue(tbZoom.Value.ToString());
        }

        private void btnZoomMin_Click(object sender, EventArgs e)
        {
            tbZoom.Value = min_zoom_pulse;
            sendZoomValue(tbZoom.Value.ToString());
        }

        private void cbTestZoom_CheckedChanged(object sender, EventArgs e)
        {
            if (cbTestZoom.Checked)
            {
                timerZoomTestSeq.Start();
            } else
            {
                timerZoomTestSeq.Stop();
            }
        }

        private void timerZoomTestSeq_Tick(object sender, EventArgs e)
        {
            if (zoomTestSeqFlag)
            {
                tbZoom.Value = min_zoom_pulse;
                sendZoomValue(tbZoom.Value.ToString());
                zoomTestSeqFlag = false;
            } else
            {
                tbZoom.Value = max_zoom_pulse;
                sendZoomValue(tbZoom.Value.ToString());
                zoomTestSeqFlag = true;
            }
        }
    }
}