public EncoderPipeline([NotNull] WaveFormat inputFormat, [NotNull] IVoiceEncoder encoder, [NotNull] ICommsNetwork net)
{
if (inputFormat == null)
{
throw new ArgumentNullException("inputFormat");
}
if (encoder == null)
{
throw new ArgumentNullException("encoder");
}
if (net == null)
{
throw new ArgumentNullException("net");
}
_net = net;
_inputFormat = inputFormat;
_encoder = new ReadonlyLockedValue <IVoiceEncoder>(encoder);
//Create buffers to store the encoder input (1 frame of floats) and output (twice equivalent amount of bytes)
_plainSamples = new float[encoder.FrameSize];
_encodedBytes = new byte[encoder.FrameSize * sizeof(float) * 2];
//Input buffer to store raw data from microphone
_input = new BufferedSampleProvider(_inputFormat, encoder.FrameSize * 2);
//Resample data from microphone rate -> encoder rate
_resampler = new Resampler(_input, encoder.SampleRate);
//Provides encoder sized and encoder rate frames of data
_output = new SampleToFrameProvider(_resampler, (uint)encoder.FrameSize);
}
private int EncodeFrames([NotNull] IVoiceEncoder encoder, int maxCount)
{
var count = 0;
//Read frames of resampled samples (as many as we can, we want to keep this buffer empty and latency low)
var encoderInput = new ArraySegment <float>(_plainSamples, 0, encoder.FrameSize);
while (_output.Read(encoderInput) && count < maxCount)
{
//Encode it
var encoded = encoder.Encode(encoderInput, new ArraySegment <byte>(_encodedBytes));
//Transmit it
_net.SendVoice(encoded);
count++;
}
return(count);
}
public EncoderPipeline(IMicrophoneCapture mic, IVoiceEncoder encoder, ICommsNetwork net, Func <int> channelCount)
{
_mic = mic;
_encoder = encoder;
_net = net;
_channelCount = channelCount;
_encodedBytes = new byte[encoder.FrameSize * sizeof(float)];
_plainSamples = new float[encoder.FrameSize];
_inputFormat = mic.Format;
//Create an input buffer with plenty of spare space
_input = new BufferedSampleProvider(_inputFormat, Math.Max(_encoder.FrameSize * 2, mic.FrameSize * 2));
_resampler = new Resampler(_input, _encoder.SampleRate);
//Whatever we did above, we need to read in frame size chunks
_output = new SampleToFrameProvider(_resampler, (uint)encoder.FrameSize);
}