public override void Process()
{
var fftsToRead = Math.Min(_portInp.BufferCapacity / FFTSize, _portInp.Available / FFTSize);
var outputFramesFree = _portOut.Free;
if (outputFramesFree == 0)
{
return;
}
var inputBuffer = _portInp.Read(Math.Min(outputFramesFree, fftsToRead) * FFTSize);
var inputSamples = inputBuffer.Data;
for (int i = 0; i < inputBuffer.Available; i++)
{
_frameBuffer[inputSampleCount++] = inputSamples[i];
if (inputSampleCount == _fft.Size)
{
_fft.UseData(_frameBuffer, 0, _fft.Size);
var result = _fft.Transform();
_portOut.WriteFrame(result, 0);
inputSampleCount = 0;
}
}
}
public IEnumerable <double[]> Iterate(long at, long count, long step)
{
var buffer = new double[FftSize];
for (var i = 0; i < count; i++)
{
var remaining = _cb.FillBuffer(at + i * step, FftSize, 1, buffer);
if (remaining == FftSize)
{
yield return(new double[0]);
}
else
{
_trans.UseData(buffer, 0, buffer.Length);
yield return(_trans.Transform());
}
}
}
protected override void DataAvailable(DataInputPort port)
{
while (_portInp.Queue.Length > _bufIn.Length)
{
var samples = _bufOut.GetSamples();
var k = 0;
_portInp.Queue.Dequeue(_bufIn);
for (int i = 0; i < _bufIn.Length; i += _fft.Size)
{
_fft.UseData(_bufIn.GetSamples(), i, _fft.Size);
var result = _fft.Transform();
for (int j = 0; j < result.Length; j++)
{
samples[k++] = result[j];
}
}
_bufOut.SetWritten(k);
_portOut.SendData(_bufOut);
}
}
