private static async void ScreenCastInitiated(object sender, ScreenCastRequest screenCastRequest)
{
ICapturer capturer;
try
{
if (Conductor.Viewers.Count == 0)
{
capturer = new DXCapture();
}
else
{
capturer = new BitBltCapture();
}
}
catch (Exception ex)
{
Logger.Write(ex);
capturer = new BitBltCapture();
}
await Conductor.CasterSocket.SendCursorChange(CursorIconWatcher.GetCurrentCursor(), new List <string>() { screenCastRequest.ViewerID });
ScreenCaster.BeginScreenCasting(screenCastRequest.ViewerID, screenCastRequest.RequesterName, capturer, Conductor);
BeginAudioCapture();
}
private void ScreenCastRequested(object sender, ScreenCastRequest screenCastRequest)
{
App.Current.Dispatcher.Invoke(() =>
{
var result = MessageBox.Show($"You've received a connection request from {screenCastRequest.RequesterName}. Accept?", "Connection Request", MessageBoxButton.YesNo, MessageBoxImage.Question);
if (result == MessageBoxResult.Yes)
{
Task.Run(async() =>
{
ICapturer capturer;
try
{
if (Conductor.Viewers.Count == 0)
{
capturer = new DXCapture();
}
else
{
capturer = new BitBltCapture();
}
}
catch (Exception ex)
{
Logger.Write(ex);
capturer = new BitBltCapture();
}
await Conductor.CasterSocket.SendCursorChange(CursorIconWatcher.GetCurrentCursor(), new List <string>()
{
screenCastRequest.ViewerID
});
ScreenCaster.BeginScreenCasting(screenCastRequest.ViewerID, screenCastRequest.RequesterName, capturer, Conductor);
});
}
});
}
public async Task BeginScreenCasting(ScreenCastRequest screenCastRequest)
{
var mode = AppMode.Unattended;
try
{
Bitmap currentFrame = null;
Bitmap previousFrame = null;
byte[] encodedImageBytes;
var fpsQueue = new Queue <DateTimeOffset>();
mode = Conductor.Mode;
var viewer = ServiceContainer.Instance.GetRequiredService <Viewer>();
viewer.Name = screenCastRequest.RequesterName;
viewer.ViewerConnectionID = screenCastRequest.ViewerID;
Logger.Write($"Starting screen cast. Requester: {viewer.Name}. Viewer ID: {viewer.ViewerConnectionID}. App Mode: {mode}");
Conductor.Viewers.AddOrUpdate(viewer.ViewerConnectionID, viewer, (id, v) => viewer);
if (mode == AppMode.Normal)
{
Conductor.InvokeViewerAdded(viewer);
}
if (mode == AppMode.Unattended && screenCastRequest.NotifyUser)
{
SessionIndicator.Show();
}
await viewer.SendViewerConnected();
await viewer.SendMachineName(Environment.MachineName);
await viewer.SendScreenData(
viewer.Capturer.SelectedScreen,
viewer.Capturer.GetDisplayNames().ToArray());
await viewer.SendScreenSize(viewer.Capturer.CurrentScreenBounds.Width,
viewer.Capturer.CurrentScreenBounds.Height);
await viewer.SendCursorChange(CursorIconWatcher.GetCurrentCursor());
await viewer.SendWindowsSessions();
viewer.Capturer.ScreenChanged += async(sender, bounds) =>
{
await viewer.SendScreenSize(bounds.Width, bounds.Height);
};
using (var initialFrame = viewer.Capturer.GetNextFrame())
{
await viewer.SendScreenCapture(
ImageUtils.EncodeBitmap(initialFrame, viewer.EncoderParams),
viewer.Capturer.CurrentScreenBounds.Left,
viewer.Capturer.CurrentScreenBounds.Top,
viewer.Capturer.CurrentScreenBounds.Width,
viewer.Capturer.CurrentScreenBounds.Height);
}
if (EnvironmentHelper.IsWindows)
{
await viewer.InitializeWebRtc();
}
while (!viewer.DisconnectRequested && viewer.IsConnected)
{
try
{
if (viewer.IsUsingWebRtcVideo)
{
Thread.Sleep(100);
continue;
}
if (viewer.IsStalled)
{
// Viewer isn't responding. Abort sending.
break;
}
if (EnvironmentHelper.IsDebug)
{
while (fpsQueue.Any() && DateTimeOffset.Now - fpsQueue.Peek() > TimeSpan.FromSeconds(1))
{
fpsQueue.Dequeue();
}
fpsQueue.Enqueue(DateTimeOffset.Now);
Debug.WriteLine($"Capture FPS: {fpsQueue.Count}");
}
viewer.ThrottleIfNeeded();
if (currentFrame != null)
{
previousFrame?.Dispose();
previousFrame = (Bitmap)currentFrame.Clone();
}
currentFrame?.Dispose();
currentFrame = viewer.Capturer.GetNextFrame();
var diffAreas = ImageUtils.GetDiffAreas(currentFrame, previousFrame, viewer.Capturer.CaptureFullscreen);
if (diffAreas.Count == 0)
{
continue;
}
foreach (var diffArea in diffAreas)
{
using var newImage = currentFrame.Clone(diffArea, PixelFormat.Format32bppArgb);
if (viewer.Capturer.CaptureFullscreen)
{
viewer.Capturer.CaptureFullscreen = false;
}
encodedImageBytes = ImageUtils.EncodeBitmap(newImage, viewer.EncoderParams);
if (encodedImageBytes?.Length > 0)
{
await viewer.SendScreenCapture(encodedImageBytes, diffArea.Left, diffArea.Top, diffArea.Width, diffArea.Height);
}
}
}
catch (Exception ex)
{
Logger.Write(ex);
}
}
Logger.Write($"Ended screen cast. Requester: {viewer.Name}. Viewer ID: {viewer.ViewerConnectionID}.");
Conductor.Viewers.TryRemove(viewer.ViewerConnectionID, out _);
viewer.Dispose();
}
catch (Exception ex)
{
Logger.Write(ex);
}
finally
{
// Close if no one is viewing.
if (Conductor.Viewers.Count == 0 && mode == AppMode.Unattended)
{
await ShutdownService.Shutdown();
}
}
}