public void Start(string inputDevice)
{
if (Started)
{
throw new Exception("Input already started");
}
//waveIn = new WaveIn(WaveCallbackInfo.FunctionCallback());
waveIn = new WaveInEvent();
waveIn.BufferMilliseconds = 20;
//Console.WriteLine("Input device: " + WaveIn.GetCapabilities(0).ProductName);
waveIn.DeviceNumber = ClientAudioUtilities.MapInputDevice(inputDevice);
waveIn.DataAvailable += _waveIn_DataAvailable;
waveIn.WaveFormat = new WaveFormat(sampleRate, 16, 1);
inputVolumeStreamArgs = new InputVolumeStreamEventArgs()
{
DeviceNumber = waveIn.DeviceNumber, PeakRaw = 0, PeakDB = float.NegativeInfinity, PeakVU = 0
};
opusDataAvailableArgs = new OpusDataAvailableEventArgs();
//inputControls = ClientAudioUtilities.GetWaveInMixerControls(waveIn.DeviceNumber);
waveIn.StartRecording();
Started = true;
}
public void Start(string outputDevice, ISampleProvider sampleProvider)
{
if (Started)
{
throw new Exception("Output already started");
}
MMDevice device = ClientAudioUtilities.MapWasapiOutputDevice(outputDevice);
waveOut = new WasapiOut(device, AudioClientShareMode.Shared, true, 20);
waveOut.Init(sampleProvider);
waveOut.Play();
Started = true;
}
private void audioTimer_Elapsed(object sender, ElapsedEventArgs e)
{
List <TxTransceiverDto> transceivers = new List <TxTransceiverDto> {
new TxTransceiverDto()
{
ID = 0
}
};
//Play a sample every 10 seconds.
//audioPublishInputQueue.Add(trimmedBuff);
var reader = new WaveFileReader(file);
var bytes = (int)reader.SampleCount * 2;
bytes = bytes - (bytes % reader.BlockAlign);
byte[] buffer = new byte[bytes];
reader.Read(buffer, 0, bytes);
var waveBuffer = ClientAudioUtilities.ConvertBytesTo16BitPCM(buffer);
int segmentCount = (int)System.Math.Floor((decimal)waveBuffer.Length / frameSize);
int bufferOffset = 0;
for (int i = 0; i < segmentCount; i++)
{
int len = encoder.Encode(waveBuffer, bufferOffset, frameSize, encodedDataBuffer, 0, encodedDataBuffer.Length);
bufferOffset += frameSize;
byte[] trimmedBuff = new byte[len];
Buffer.BlockCopy(encodedDataBuffer, 0, trimmedBuff, 0, len);
if (Connection.IsConnected)
{
Connection.VoiceServerTransmitQueue.Add(new AudioTxDto()
{
Callsign = Callsign,
SequenceCounter = audioSequenceCounter++,
Audio = trimmedBuff,
LastPacket = false,
Transceivers = transceivers.ToArray()
});
}
Thread.Sleep(17);
}
Array.Clear(lastPacketBuffer, 0, frameSize);
int remainderSamples = waveBuffer.Length - (segmentCount * frameSize);
Buffer.BlockCopy(waveBuffer, bufferOffset, lastPacketBuffer, 0, remainderSamples);
int lenRemainder = encoder.Encode(lastPacketBuffer, 0, frameSize, encodedDataBuffer, 0, encodedDataBuffer.Length);
byte[] trimmedBuffRemainder = new byte[lenRemainder];
Buffer.BlockCopy(encodedDataBuffer, 0, trimmedBuffRemainder, 0, lenRemainder);
Connection.VoiceServerTransmitQueue.Add(new AudioTxDto()
{
Callsign = Callsign,
SequenceCounter = audioSequenceCounter++,
Audio = trimmedBuffRemainder,
LastPacket = true,
Transceivers = transceivers.ToArray()
});
}
private void _waveIn_DataAvailable(object sender, WaveInEventArgs e)
{
var samples = ClientAudioUtilities.ConvertBytesTo16BitPCM(e.Buffer);
if (samples.Length != frameSize)
{
throw new Exception("Incorrect number of samples.");
}
float value = 0;
for (int i = 0; i < samples.Length; i++)
{
value = samples[i] * Volume;
if (value > short.MaxValue)
{
value = short.MaxValue;
}
if (value < short.MinValue)
{
value = short.MinValue;
}
samples[i] = (short)value;
}
encodedDataLength = encoder.Encode(samples, 0, frameSize, encodedDataBuffer, 0, encodedDataBuffer.Length);
OpusBytesEncoded += encodedDataLength;
//Calculate max and raise event if needed
if (InputVolumeStream != null)
{
for (int i = 0; i < samples.Length; i++)
{
sampleInput = samples[i];
sampleInput = System.Math.Abs(sampleInput);
if (sampleInput > maxSampleInput)
{
maxSampleInput = sampleInput;
}
}
sampleCount += samples.Length;
if (sampleCount >= sampleCountPerEvent)
{
inputVolumeStreamArgs.PeakRaw = maxSampleInput / short.MaxValue;
inputVolumeStreamArgs.PeakDB = (float)(20 * Math.Log10(inputVolumeStreamArgs.PeakRaw));
float db = inputVolumeStreamArgs.PeakDB;
if (db < minDb)
{
db = minDb;
}
if (db > maxDb)
{
db = maxDb;
}
float ratio = (db - minDb) / (maxDb - minDb);
if (ratio < 0.30)
{
ratio = 0;
}
if (ratio > 1.0)
{
ratio = 1;
}
inputVolumeStreamArgs.PeakVU = ratio;
InputVolumeStream(this, inputVolumeStreamArgs);
sampleCount = 0;
maxSampleInput = 0;
}
}
if (OpusDataAvailable != null)
{
byte[] trimmedBuff = new byte[encodedDataLength];
Buffer.BlockCopy(encodedDataBuffer, 0, trimmedBuff, 0, encodedDataLength);
opusDataAvailableArgs.Audio = trimmedBuff;
opusDataAvailableArgs.SequenceCounter = audioSequenceCounter++;
OpusDataAvailable(this, opusDataAvailableArgs);
}
}
