public ImageSharpRenderer(int frameWidth, int frameHeight, VideoTrack videoTrack)
{
VideoTrack = videoTrack;
using (var background = Image.Load <PixelColor>("background-small.jpg"))
{
background.Mutate(ctx => ctx.Resize(frameWidth, frameHeight));
// Pre-created bouncing ball frames.
// ImageSharp is not that fast yet, and our goal is to benchmark webrtc and NvEnc, not ImageSharp.
var ballRadius = background.Width / 20f;
var ballPath = new EllipsePolygon(0, 0, ballRadius);
var ballColor = new PixelColor(255, 255, 128);
for (int i = 0; i < FrameCount; ++i)
{
// ReSharper disable once AccessToDisposedClosure
var image = background.Clone();
var a = Math.PI * i / FrameCount;
var h = image.Height - ballRadius;
var y = image.Height - (float)(Math.Abs(Math.Sin(a) * h));
image.Mutate(ctx => ctx
.Fill(GraphicsOptions.Default, ballColor, ballPath.Translate(image.Width / 2f, y)));
_videoFrames.Add(image);
}
}
}
public bool SendFrame(TimeSpan elapsedTime, int frameIndex)
{
var imageFrameIndex = frameIndex % FrameCount;
var imageFrame = _videoFrames[imageFrameIndex].Frames[0];
var pixels = MemoryMarshal.Cast <PixelColor, uint>(imageFrame.GetPixelSpan());
var format = PeerConnection.SupportsHardwareTextureEncoding
? VideoFrameFormat.CpuTexture
: VideoFrameFormat.Bgra32;
VideoTrack.SendVideoFrame(MemoryMarshal.GetReference(pixels),
imageFrame.Width * 4,
imageFrame.Width,
imageFrame.Height,
format);
return(true);
}
private void Run()
{
try
{
// For debugging, run everything on this thread.
// Should never be done in production.
// Note that webrtc callbacks are done on the signaling thread, and must return asap.
PeerConnection.Configure(new GlobalOptions
{
UseWorkerThread = false,
UseSignalingThread = false,
ForceSoftwareVideoEncoder = true,
MinimumLogLevel = System.Diagnostics.TraceLevel.Info,
LogToStandardError = false,
LogToDebugOutput = false
});
PeerConnection.MessageLogged += (message, severity) =>
{
severity.WriteToConsole(message);
};
Console.OutputEncoding = Encoding.UTF8;
const int frameWidth = 320;
const int frameHeight = 180;
const int frameRate = 10;
using (var senderOutgoingMessages = new ReplaySubject <DataMessage>())
using (var sender = new ObservablePeerConnection(new PeerConnectionOptions
{
Name = "Sender"
}))
using (var receiver = new ObservablePeerConnection(new PeerConnectionOptions
{
Name = "Receiver",
CanReceiveVideo = true
}))
using (var background = Image.Load <Argb32>("background-small.jpg"))
using (receiver.ReceivedVideoStream.Buffer(2).Subscribe(SaveFrame))
using (var imageFrame = new Image <Argb32>(frameWidth, frameHeight))
using (var videoTrack = new VideoTrack(sender,
VideoEncoderOptions.OptimizedFor(frameWidth, frameHeight, frameRate)))
{
background.Mutate(ctx => ctx.Resize(frameWidth, frameHeight));
senderOutgoingMessages.OnNext(new DataMessage("data", "Hello"));
sender.CreateOffer();
sender.Connect(senderOutgoingMessages, receiver.LocalSessionDescriptionStream, receiver.LocalIceCandidateStream);
var receiverOutgoingMessages = receiver
.ReceivedDataStream
.Where(msg => msg.AsText == "Hello")
.Do(msg => Console.WriteLine($"Received message {msg.AsText}"))
.Select(msg => new DataMessage(msg.Label, "World"));
receiver.Connect(receiverOutgoingMessages, sender.LocalSessionDescriptionStream, sender.LocalIceCandidateStream);
sender.AddDataChannel(new DataChannelOptions());
Console.WriteLine("Press any key to exit");
int localFrameIndex = 0;
var timeout = TimeSpan.FromMilliseconds(1000.0 / frameRate);
//while (!Console.KeyAvailable && PeerConnection.PumpQueuedMessages(timeout))
while (PeerConnection.PumpQueuedMessages(timeout))
{
var frame = imageFrame.Frames[0];
var pixels = MemoryMarshal.Cast <Argb32, uint>(frame.GetPixelSpan());
videoTrack.SendVideoFrame(MemoryMarshal.GetReference(pixels),
frame.Width * 4,
frame.Width,
frame.Height,
VideoFrameFormat.Argb32);
imageFrame.Mutate(ctx => ctx.DrawImage(GraphicsOptions.Default, background).Rotate(localFrameIndex * 10).Crop(frameWidth, frameHeight));
++localFrameIndex;
}
sender.RemoveDataChannel("data");
}
}
catch (Exception ex)
{
Console.WriteLine($"*** FAILURE: {ex}");
}
Console.WriteLine("Press ENTER to exit");
Console.ReadLine();
}
