private void SendSingleFrame(IEnumerable <byte> bytes, bool isCRCIncluded)
{
if (forwardCRCFromApplication.Value && !isCRCIncluded)
{
this.Log(LogLevel.Error, "CRC needs to be provided by the application but is missing");
return;
}
var bytesArray = bytes.ToArray();
var newLength = isCRCIncluded ? 64 : 60;
if (bytesArray.Length < newLength)
{
Array.Resize(ref bytesArray, newLength);
}
var addCrc = !isCRCIncluded && !forwardCRCFromApplication.Value;
if (!Misc.TryCreateFrameOrLogWarning(this, bytesArray, out var frame, addCrc))
{
return;
}
this.Log(LogLevel.Debug, "Sending packet, length {0}", frame.Bytes.Length);
FrameReady?.Invoke(frame);
}
private void TransmitLoop(CancellationToken token)
{
while (true)
{
byte[] buffer = null;
if (stream == null)
{
return;
}
try
{
buffer = LibC.ReadDataWithTimeout(stream.Handle, MTU, 1000, () => token.IsCancellationRequested);
}
catch (ArgumentException)
{
// stream was closed
return;
}
catch (ObjectDisposedException)
{
return;
}
if (token.IsCancellationRequested)
{
return;
}
if (buffer == null || buffer.Length == 0)
{
continue;
}
var ethernetFrame = EthernetFrame.CreateEthernetFrameWithCRC(buffer);
FrameReady?.Invoke(ethernetFrame);
}
}
public void ReceiveFrame(EthernetFrame frame)
{
var ethernetPacket = frame.UnderlyingPacket;
this.Log(LogLevel.Noisy, "Ethernet packet details: {0}", ethernetPacket);
#if DEBUG_PACKETS
this.Log(LogLevel.Noisy, Misc.PrettyPrintCollectionHex(frame.Bytes));
#endif
switch (ethernetPacket.Type)
{
case EthernetPacketType.Arp:
if (TryHandleArp((ARPPacket)ethernetPacket.PayloadPacket, out var arpResponse))
{
var ethernetResponse = new EthernetPacket((PhysicalAddress)MAC, ethernetPacket.SourceHwAddress, EthernetPacketType.None);
ethernetResponse.PayloadPacket = arpResponse;
this.Log(LogLevel.Noisy, "Sending response: {0}", ethernetResponse);
EthernetFrame.TryCreateEthernetFrame(ethernetResponse.Bytes, true, out var response);
FrameReady?.Invoke(response);
}
break;
case EthernetPacketType.IpV4:
var ipv4Packet = (IPv4Packet)ethernetPacket.PayloadPacket;
arpTable[ipv4Packet.SourceAddress] = ethernetPacket.SourceHwAddress;
HandleIPv4(ipv4Packet);
break;
default:
this.Log(LogLevel.Warning, "Unsupported packet type: {0}", ethernetPacket.Type);
break;
}
}
//DateTime dtLastFrame = DateTime.Now;
//int counter = 0;
private void ProcessFrame(byte[] frame)
{
CurrentFrame = frame;
_context.Post(delegate
{
//added try/catch because sometimes jpeg images are corrupted
try
{
using (var stream = new MemoryStream(frame))
{
var old = Bitmap;
Bitmap = new Bitmap(stream);
FrameReady?.Invoke(this, new FrameReadyEventArgs
{
FrameBuffer = CurrentFrame,
Bitmap = Bitmap,
});
if (old != null)
{
old.Dispose();
}
}
}
catch
{
}
}, null);
}
//DateTime dtLastFrame = DateTime.Now;
//int counter = 0;
private void ProcessFrame(byte[] frame)
{
CurrentFrame = frame;
// 2018-03-07, Alex
// Check if code is executed in application context (wpf)
_context.Post(delegate
{
//added try/catch because sometimes jpeg images are corrupted
try
{
FrameReady?.Invoke(this, new FrameReadyEventArgs
{
FrameBuffer = CurrentFrame,
});
}
catch (Exception ex)
{
// log.Error("ProcessFrame failed", ex);
}
}, null);
// 2018-03-07, Alex
// Check if code is executed without any context (owin self-host)
}
private void ProcessFrame(object sender, FrameReadyEventArgs e)
{
if (!Paused)
{
FrameReady?.Invoke(this, e);
}
}
private void SendSingleFrame(IEnumerable <byte> bytes, bool isCRCIncluded)
{
if (forwardCRCFromApplication.Value && !isCRCIncluded)
{
this.Log(LogLevel.Error, "CRC needs to be provided by the application but is missing");
return;
}
var bytesArray = bytes.ToArray();
var newLength = isCRCIncluded ? 64 : 60;
if (bytesArray.Length < newLength)
{
Array.Resize(ref bytesArray, newLength);
}
var addCrc = !isCRCIncluded && !forwardCRCFromApplication.Value;
if (!Misc.TryCreateFrameOrLogWarning(this, bytesArray, out var frame, addCrc))
{
return;
}
if (insertProtocolChecksum.Value)
{
frame.FillWithChecksums(new EtherType[] {}, new [] { IPProtocolType.ICMP, IPProtocolType.ICMPV6, IPProtocolType.TCP, IPProtocolType.UDP });
}
if (insertIPHeaderChecksum.Value)
{
frame.FillWithChecksums(new [] { EtherType.IpV4 }, new IPProtocolType[] {});
}
this.Log(LogLevel.Debug, "Sending packet, length {0}", frame.Bytes.Length);
FrameReady?.Invoke(frame);
}
private void OnFrameGrabbed(object sender, EventArgs e)
{
// Retrive the frame from the camera
_capture.Retrieve(_frame);
using (UMat ugray = new UMat())
{
// Convert to grayscale
CvInvoke.CvtColor(_frame, ugray, ColorConversion.Bgr2Gray);
// Normalizes brightness and increases contrast of the image
CvInvoke.EqualizeHist(ugray, ugray);
// Detect the faces from the gray scale image and store the locations as rectangles.
// The first dimension is the channel,
// The second dimension is the index of the rectangle in the specific channel
var faceBounds = _faceDetector.DetectMultiScale(
ugray,
1.1,
10,
new Size(20, 20)
);
_logger.LogTrace("Got frame. Found {0} faces.", faceBounds.Length);
// Publish a completed frame
FrameReady?.Invoke(this, new VideoFrame(
DateTime.Now,
faceBounds.Select(bounds => new Face(bounds)).ToList(),
_frame.Bitmap
));
}
}
public void CaptureFrameStart()
{
if (_capture != null)
{
if (_captureInProgress)
{
_captureInProgress = false; //Flag the state of the camera
}
else
{
RetrieveCaptureInformation(); //Get Camera information
_capture.SetCaptureProperty(CapProp.Monochrome, 1);
Task.Run(() =>
{
while (KeepGoing)
{
if (!Paused)
{
Thread.Sleep(100);
RetrieveImage();
FrameReady?.Invoke(this, new FrameReadyEventArgs(CurrentImage));
}
}
});
_captureInProgress = true; //Flag the state of the camera
}
}
else
{
SetupCapture();
CaptureFrameStart(); //recursivly backup
}
}
private async Task ReadPacketAsync()
{
var buffer = new byte[Mtu];
while (!cts.IsCancellationRequested)
{
try
{
if (await deviceFile.ReadAsync(buffer, 0, buffer.Length, cts.Token) > 0)
{
if (!Misc.TryCreateFrameOrLogWarning(this, buffer, out var frame, addCrc: true))
{
return;
}
FrameReady?.Invoke(frame);
this.NoisyLog("Frame of length {0} received from host.", frame.Bytes.Length);
}
}
catch (IOException)
{
if (networkInterface.OperationalStatus != OperationalStatus.Up)
{
this.NoisyLog("I/O exception while interface is not up, waiting {0}s.", Misc.NormalizeDecimal(GracePeriod.TotalSeconds));
// probably the interface is not opened yet
await Task.Delay(GracePeriod);
}
else
{
throw;
}
}
}
}
private VideoFrame QueueFrame(MemoryStream stream, long frameIndex)
{
var frame = new VideoFrame(stream.ToArray(), frameIndex, TimeSpan.FromSeconds(frameIndex / _frameRate), _frameDuration);
_frames.Push(frame);
FrameReady?.Invoke(this, new FrameReadyArgs(frame));
return(frame);
}
private void ProcessFrame(byte[] frame)
{
CurrentFrame = frame;
_context.Post(delegate
{
// tell whoever's listening that we have a frame to draw
FrameReady?.Invoke(this, new FrameReadyEventArgs(CurrentFrame));
}, null);
}
private void transmitFrame()
{
var td = new transmitDescriptor(machine.SystemBus);
td.Fetch(transmitDescriptorBase | transmitDescriptorOffset);
if (!td.Enable)
{
return; //if decriptor is disabled there is nothing to send (just return)
}
var packetBytes = machine.SystemBus.ReadBytes(td.PacketAddress, (int)td.Length);
if (!Misc.TryCreateFrameOrLogWarning(this, packetBytes, out var packet, addCrc: true))
{
return;
}
this.Log(LogLevel.Info, "Sending packet length {0}", packet.Bytes.Length);
this.Log(LogLevel.Info, "Packet address = 0x{0:X}", td.PacketAddress);
FrameReady?.Invoke(packet);
registers.Status |= 1u << 3;
if (td.Wrap)
{
transmitDescriptorOffset = 0;
}
else
{
if (transmitDescriptorOffset != 0x3f8)
{
transmitDescriptorOffset += 8;
}
else
{
transmitDescriptorOffset = 0;
}
}
if (td.InterruptEnable && ((registers.Control & (1u << 2)) != 0))
{
//if interrupts enabled
registers.Status |= 1u << 3; //transmitter interrupt bit
this.IRQ.Set();
this.IRQ.Unset();
}
td.Enable = false;
td.Wrap = false;
td.InterruptEnable = false;
td.Length = 0;
td.UnderrunError = false;
td.AttemptLimitError = false;
td.WriteBack();
}
public void HandleFrame(SKImage frame)
{
if (!paused)
{
FrameReady?.Invoke(this, new FrameReadyEventArgs()
{
FrameBuffer = null, Image = frame
});
}
}
private void Finished()
{
if (mode == Mode.WaitingForPacket)
{
this.DebugLog("Packet received, LEN {7} {0:x} {1:x} {2:x} {3:x} (...) {4:x} {5:x} {6:x}", request[0], request[1], request[2], request[3], request[currentLength - 5], request[currentLength - 4], request[currentLength - 3], currentLength);
var frame = new byte[currentLength];
Array.Copy(request, 0, frame, 0, currentLength);
//TODO: CRC handling
if (!Misc.TryCreateFrameOrLogWarning(this, frame, out var ethernetFrame, addCrc: false))
{
return;
}
FrameReady?.Invoke(ethernetFrame);
mode = Mode.Standard;
currentLength = 4;
transmissionEnded = true;
if (interruptAfterTransmision)
{
SignalInterrupt();
}
}
if (mode == Mode.SendingPacket)
{
mode = Mode.Standard;
currentLength = 4;
lock (packetQueue)
{
if (packetQueue.Count > 0)
{
SignalInterrupt();
}
}
}
if (mode == Mode.Special)
{
currentLength = 4;
mode = Mode.Standard;
return;
}
switch (lastPacketType)
{
case 0xC0:
mode = Mode.WaitingForPacket;
var encodedLength = request[3] + (request[4] << 8);
this.DebugLog("Encoded length is 0x{0:X}.", encodedLength);
currentLength = Align(encodedLength + 1 + 1);
transmissionEnded = false;
break;
case 0xF:
lastPacketType = 0;
break;
}
}
public void FrameReceived(byte[] bytes, SKImage sKImage)
{
if (!Paused)
{
Main.Post(delegate
{
FrameReady?.Invoke(this, new FrameReadyEventArgs()
{
FrameBuffer = bytes, Image = sKImage
});
}, null);
}
}
public void UpdateFrame()
{
// get it on the UI thread
m_context.Post(delegate
{
// update event data
m_frame_ready_event_param.Width = m_image_width;
m_frame_ready_event_param.Height = m_image_height;
m_frame_ready_event_param.FrameData = m_frame_buffer.ByteBuffer;
// tell whoever's listening that we have a frame to draw
FrameReady?.Invoke(this, m_frame_ready_event_param);
}, null);
}
private void HandleUdpResponse(IPEndPoint source, UdpPacket response)
{
var ipPacket = new IPv4Packet(IP, source.Address);
var ethernetPacket = new EthernetPacket((PhysicalAddress)MAC, arpTable[source.Address], EthernetPacketType.None);
ipPacket.PayloadPacket = response;
ethernetPacket.PayloadPacket = ipPacket;
response.UpdateCalculatedValues();
this.Log(LogLevel.Noisy, "Sending UDP response: {0}", response);
EthernetFrame.TryCreateEthernetFrame(ethernetPacket.Bytes, true, out var ethernetFrame);
FrameReady?.Invoke(ethernetFrame);
}
private void SendPacket()
{
var slot = readSlots[readerSlotNumber.Value];
if (!Misc.TryCreateFrameOrLogWarning(this, slot.Read(), out var frame, addCrc: true))
{
return;
}
this.Log(LogLevel.Noisy, "Sending packet of length {0} bytes.", frame.Length);
FrameReady?.Invoke(frame);
readerEventPending.Value = true;
RefreshIrq();
}
private void ProcessFrame(byte[] frameBuffer)
{
_context.Post(delegate
{
// create a simple GDI+ happy Bitmap
//bitmap = new Bitmap(new MemoryStream(frameBuffer));
bitmap = BitmapFactory.DecodeByteArray(frameBuffer, 0, frameBuffer.Length);
// tell whoever's listening that we have a frame to draw
FrameReady?.Invoke(this, new FrameReadyEventArgs {
FrameBuffer = CurrentFrame, Bitmap = bitmap
});
}, null);
}
private void Capture_FrameReady(object sender, FrameArgs e)
{
lock (matLocker)
{
if (mat != null)
{
mat.Dispose();
mat = null;
}
mat = e.Mat;
e.MatDispose = false;
FrameReady?.Invoke(this, mat);
}
}
public void WriteDataBulk(USBPacket packet)
{
if (packet.data == null)
{
return;
}
byte[] packetToSend;
if (packet.data[5] != 64)
{
packetToSend = new byte[packet.data.Length - 8];
Array.Copy(packet.data, 8, packetToSend, 0, packetToSend.Length);
}
else
{
packetToSend = new byte[packet.data.Length - 12];
Array.Copy(packet.data, 12, packetToSend, 0, packetToSend.Length);
if ((packetToSend[14] & 0xF0) == 0x40) //IP packet
{
ushort cksum;
IPHeaderLength = (ushort)((packetToSend[14] & 0x0F) * 4);
if (packetToSend[23] == 0x06) // TCP packet
{
IPpacket tcpPacket = new IPpacket(IPHeaderLength, IPpacket.PacketType.TCP);
tcpPacket.ReadFromBuffer(packetToSend);
cksum = tcpPacket.GetChecksum();
cksum -= 1;
packetToSend[MACHeaderLegth + IPHeaderLength + 16] = (byte)((cksum >> 8) & 0xFF);
packetToSend[MACHeaderLegth + IPHeaderLength + 17] = (byte)((cksum) & 0xFF);
}
else if (packetToSend[23] == 0x11) // UDP packet
{
IPpacket udpPacket = new IPpacket(IPHeaderLength, IPpacket.PacketType.UDP);
udpPacket.ReadFromBuffer(packetToSend);
cksum = udpPacket.GetChecksum();
cksum -= 1;
packetToSend[MACHeaderLegth + IPHeaderLength + 6] = (byte)((cksum >> 8) & 0xFF);
packetToSend[MACHeaderLegth + IPHeaderLength + 7] = (byte)((cksum) & 0xFF);
}
}
}
if (Misc.TryCreateFrameOrLogWarning(this, packetToSend, out var frame, addCrc: true))
{
FrameReady?.Invoke(frame);
}
}
private void TransmitPacket()
{
var packetSize = transmitBufferEnd - transmitBufferStart; // -1 for the per packet control byte, but transmitBufferEnd points to the last byte of the packet
var data = new byte[packetSize];
Array.Copy(ethernetBuffer, transmitBufferStart + 1, data, 0, packetSize);
if (!Misc.TryCreateFrameOrLogWarning(this, data, out var frame, addCrc: true))
{
return;
}
// status vector is not implemented yet
this.Log(LogLevel.Debug, "Sending frame {0}.", frame);
FrameReady?.Invoke(frame);
transmitPacketInterrupt.Value = true;
RefreshInterruptStatus();
}
public byte Transmit()
{
lock (lockObj)
{
int len;
byte whichPacket;
if ((transmitControl & TransmitEnabled) == 0)
{
return(0);
}
if (txFifo.Count == 0)
{
return(0);
}
while (txFifo.Count > 0)
{
whichPacket = txFifo.Dequeue();
var currentBuffer = memoryBuffer[whichPacket];
len = currentBuffer.Data[2];
len |= currentBuffer.Data[3] << 8;
len -= 6;
byte [] indata = new byte[len];
for (int j = 0; j < len; j++)
{
indata[j] = currentBuffer.Data[j + 4];
}
if ((control & ControlAutorelease) != 0)
{
currentBuffer.IsAllocated = false;
}
else
{
sentFifo.Enqueue((byte)whichPacket);
}
if (Misc.TryCreateFrameOrLogWarning(this, indata, out var frame, addCrc: true))
{
FrameReady?.Invoke(frame);
}
}
Update();
return(0);
}
}
public byte Transmit()
{
lock (lockObj)
{
int len;
byte whichPacket;
if ((transmitControl & TransmitEnabled) == 0)
{
return(0);
}
if (txFifo.Count == 0)
{
return(0);
}
while (txFifo.Count > 0)
{
whichPacket = txFifo.Dequeue();
var currentBuffer = memoryBuffer[whichPacket];
len = currentBuffer.Data[2];
len |= currentBuffer.Data[3] << 8;
len -= 6;
byte [] indata = new byte[len];
for (int j = 0; j < len; j++)
{
indata[j] = currentBuffer.Data[j + 4];
}
if ((control & ControlAutorelease) != 0)
{
currentBuffer.IsAllocated = false;
}
else
{
sentFifo.Enqueue((byte)whichPacket);
}
var frame = EthernetFrame.CreateEthernetFrameWithCRC(indata);
FrameReady?.Invoke(frame);
}
Update();
return(0);
}
}
// https://github.com/MarekKowalski/HoloFace/blob/master/HoloFace/Assets/HololensCameraUWP.cs
private void MediaFrameReader_FrameArrived(MediaFrameReader sender, MediaFrameArrivedEventArgs args)
{
using (var frame = sender.TryAcquireLatestFrame()) {
// https://docs.microsoft.com/en-us/windows/mixed-reality/locatable-camera
var coordinateSystem = frame?.CoordinateSystem;
var cameraIntrinsics = frame?.VideoMediaFrame?.CameraIntrinsics;
var ht = coordinateSystem.TryGetTransformTo(originalFrameOfReference.CoordinateSystem);
Matrix4 webcamToWorldMatrix = new Matrix4(
ht?.M11 ?? 1, ht?.M21 ?? 0, ht?.M31 ?? 0, ht?.Translation.X ?? 0,
ht?.M12 ?? 0, ht?.M22 ?? 1, ht?.M32 ?? 0, ht?.Translation.Y ?? 0,
-ht?.M13 ?? 0, -ht?.M23 ?? 0, -ht?.M33 ?? 1, -ht?.Translation.Z ?? 0,
0, 0, 0, 1);
using (var bitmap = frame?.VideoMediaFrame?.SoftwareBitmap) {
if (bitmap == null)
{
return;
}
Width = bitmap.PixelWidth;
Height = bitmap.PixelHeight;
var projectionMatrix = new Matrix4();
projectionMatrix.M11 = 2 * cameraIntrinsics.FocalLength.X / Width;
projectionMatrix.M22 = 2 * cameraIntrinsics.FocalLength.Y / Height;
projectionMatrix.M13 = -2 * (cameraIntrinsics.PrincipalPoint.X - Width / 2) / Width;
projectionMatrix.M23 = 2 * (cameraIntrinsics.PrincipalPoint.Y - Height / 2) / Height;
projectionMatrix.M33 = -1;
projectionMatrix.M44 = -1;
ProjectionMatrix = projectionMatrix;
var copy = SoftwareBitmap.Copy(bitmap);
FrameReady?.Invoke(new FrameData()
{
bitmap = copy,
webcamToWorldMatrix = webcamToWorldMatrix,
projectionMatrix = projectionMatrix
});
}
}
}
private void Proc()
{
double lastMs = 0;
double fps = capture.Get(CaptureProperty.Fps);
char lastKey = (char)255;
if (fps < 1)
{
fps = 30;
}
while (true)
{
Mat mat = new Mat();
FrameArgs arg = new FrameArgs(mat, lastKey);
if (capture.Read(mat) && !mat.Empty())
{
Cv2.Flip(mat, mat, FlipMode.Y);
FrameReady?.Invoke(this, arg);
int sleep = (int)Math.Max(1, (1000.0 / fps) - (stopwatch.ElapsedMilliseconds - lastMs));
lastMs = stopwatch.ElapsedMilliseconds;
lastKey = (char)Cv2.WaitKey(sleep);
}
else
{
IsRunning = false;
return;
}
if (arg.MatDispose)
{
mat.Dispose();
}
if (arg.Break)
{
IsRunning = false;
return;
}
}
}
private void TransmitLoop(CancellationToken token)
{
while (true)
{
if (token.IsCancellationRequested)
{
this.Log(LogLevel.Noisy, "Requested thread cancellation - stopping reading from the TAP device file.");
return;
}
if (stream == null)
{
this.Log(LogLevel.Error, "Stream null on receiving the frame from the TAP interface - stopping reading from the TAP device file");
return;
}
try
{
var buffer = new byte[MTU];
int bytesRead = stream.Read(buffer, 0, MTU);
if (bytesRead > 0)
{
var packet = new byte[bytesRead];
Array.Copy(buffer, packet, bytesRead);
this.Log(LogLevel.Noisy, "Received {0} bytes frame", bytesRead);
if (Misc.TryCreateFrameOrLogWarning(this, packet, out var frame, addCrc: true))
{
FrameReady?.Invoke(frame);
}
}
}
catch (ArgumentException e)
{
this.Log(LogLevel.Error, "Stream was most likely closed - stopping reading from the TAP device file. Exception message: {0}", e.Message);
return;
}
catch (ObjectDisposedException e)
{
this.Log(LogLevel.Error, "Error reading data - stopping reading from the TAP device file. Exception message: {0}", e.Message);
return;
}
}
}
private void OnTimerTick(object sender, EventArgs e)
{
using (UMat ugray = new UMat())
using (Mat frame = _capture.QueryFrame())
{
if (frame == null)
{
_logger.LogWarning("Frame not ready from camera. Maybe framerate is too high?");
return;
}
// Resize the frame
CvInvoke.ResizeForFrame(frame, frame, new Size(_frameWidth, _frameHeigth), Inter.Cubic, scaleDownOnly: true);
// Convert to grayscale
CvInvoke.CvtColor(frame, ugray, ColorConversion.Bgr2Gray);
// Normalizes brightness and increases contrast of the image
CvInvoke.EqualizeHist(ugray, ugray);
// Detect the faces from the gray scale image and store the locations as rectangles.
// The first dimension is the channel,
// The second dimension is the index of the rectangle in the specific channel
var faceBounds = _faceDetector.DetectMultiScale(
ugray,
1.1,
10,
new Size(20, 20)
);
_logger.LogTrace("Got frame. Found {0} faces.", faceBounds.Length);
// Publish a completed frame
FrameReady?.Invoke(this, new VideoFrame(
DateTime.Now,
faceBounds.Select(bounds => new VideoFrame.Face(bounds, -1, -1, -1)).ToList(),
frame.ToImage <Bgr, byte>(),
_frameWidth,
_frameHeigth
));
}
}
private void SendSingleFrame(IEnumerable <byte> bytes, bool isCRCIncluded)
{
var frame = EthernetFrame.CreateEthernetFrameWithoutCRC(bytes.ToArray());
if (!isCRCIncluded)
{
if (checksumGeneratorEnabled.Value)
{
this.Log(LogLevel.Noisy, "Generating checksum for the frame");
frame.FillWithChecksums(new [] { EtherType.IpV4 }, new [] { IPProtocolType.TCP, IPProtocolType.UDP });
}
else
{
this.Log(LogLevel.Warning, "The frame has no CRC, but the automatic checksum generation is disabled");
}
}
this.Log(LogLevel.Noisy, "Sending packet, length {0}", frame.Bytes.Length);
FrameReady?.Invoke(frame);
}