public bool Write(RtpPacket packet)
{
if (_IPEndPoint == null)
{
if (IPAddress == null || Port == 0)
{
Console.Error.WriteLine("IP address and port not set yet. Discarding packet.");
return(false);
}
_IPEndPoint = new IPEndPoint(System.Net.IPAddress.Parse(IPAddress), Port);
}
var header = new RtpPacketHeader
{
Marker = packet.Marker,
Timestamp = packet.Timestamp,
SequenceNumber = packet.SequenceNumber,
PayloadType = packet.PayloadType,
SynchronizationSource = packet.SynchronizationSource
};
var headerLength = header.CalculateHeaderLength();
header.WriteTo(_Buffer, 0);
_Buffer.Write(packet.Payload, headerLength);
_Client.Send(_Buffer.Data, headerLength + packet.Payload.Length, _IPEndPoint);
return(true);
}
private async Task Loop()
{
var dispatchQueue = new DispatchQueue <UdpReceiveResult>((result) =>
{
var buffer = DataBuffer.Wrap(result.Buffer);
var header = RtpPacketHeader.ReadFrom(buffer);
try
{
OnPacket?.Invoke(new RtpPacket(buffer.Subset(header.CalculateHeaderLength()), header.SequenceNumber, header.Timestamp, header.Marker)
{
PayloadType = header.PayloadType,
SynchronizationSource = header.SynchronizationSource
});
}
catch (Exception ex)
{
Console.Error.WriteLine($"Unexpected exception raising packet. {ex}");
}
});
while (_LoopActive)
{
try
{
dispatchQueue.Enqueue(await _Server.ReceiveAsync());
}
catch (ObjectDisposedException)
{
break;
}
}
dispatchQueue.WaitForDrain();
dispatchQueue.Destroy();
}
protected override void DoProcessFrame(AudioFrame frame, AudioBuffer inputBuffer)
{
var rtpHeaders = inputBuffer.RtpHeaders;
var rtpPayloads = inputBuffer.DataBuffers;
for (var i = 0; i < rtpHeaders.Length; i++)
{
var rtpHeader = rtpHeaders[i];
if (rtpHeader == null)
{
rtpHeader = new RtpPacketHeader();
}
if (rtpHeader.SequenceNumber == -1)
{
rtpHeader.SequenceNumber = (int)(_SequenceNumber++ % (ushort.MaxValue + 1));
}
if (rtpHeader.Timestamp == -1)
{
rtpHeader.Timestamp = frame.Timestamp % ((long)uint.MaxValue + 1);
}
_Writer.Write(new RtpPacket(rtpPayloads[i], rtpHeader.SequenceNumber, rtpHeader.Timestamp, rtpHeader.Marker)
{
PayloadType = PayloadType,
SynchronizationSource = SynchronizationSource
});
}
}
protected override void DoProcessFrame(VideoFrame frame, VideoBuffer inputBuffer)
{
if (frame.Timestamp != _LastTimestamp)
{
_KeyFrameIntervalCounter++;
_LastTimestamp = frame.Timestamp;
}
if (_KeyFrameIntervalCounter == KeyFrameInterval)
{
Console.Error.WriteLine("Raising keyframe request.");
RaiseControlFrame(new FirControlFrame(new FirEntry(GetCcmSequenceNumber())));
_KeyFrameIntervalCounter = 0;
}
if (!WaitForKeyFrame)
{
_Ready = true;
}
if (!_Ready)
{
// clone to check keyframe since H.264 keyframe test on
// packetized data buffers is destructive in 1.9.x
var inputBufferClone = inputBuffer.Clone();
var dataBufferClones = new DataBuffer[inputBuffer.DataBuffers.Length];
for (var i = 0; i < dataBufferClones.Length; i++)
{
dataBufferClones[i] = DataBuffer.Wrap(inputBuffer.DataBuffers[i].ToArray());
}
inputBufferClone.DataBuffers = dataBufferClones;
if (inputBufferClone.IsKeyFrame)
{
_Ready = true;
}
}
if (_Ready)
{
var rtpHeaders = inputBuffer.RtpHeaders;
var rtpPayloads = inputBuffer.DataBuffers;
for (var i = 0; i < rtpHeaders.Length; i++)
{
var rtpHeader = rtpHeaders[i];
if (rtpHeader == null)
{
rtpHeader = new RtpPacketHeader();
}
if (rtpHeader.SequenceNumber == -1)
{
rtpHeader.SequenceNumber = (int)(_SequenceNumber++ % (ushort.MaxValue + 1));
}
if (rtpHeader.Timestamp == -1)
{
rtpHeader.Timestamp = frame.Timestamp % ((long)uint.MaxValue + 1);
}
_Writer.Write(new RtpPacket(rtpPayloads[i], rtpHeader.SequenceNumber, rtpHeader.Timestamp, rtpHeader.Marker)
{
PayloadType = PayloadType,
SynchronizationSource = SynchronizationSource
});
}
}
}
