private unsafe void Decimator_SamplesAvailable(SamplesEventArgs e)
{
// http://www.designnews.com/author.asp?section_id=1419&doc_id=236273&piddl_msgid=522392
float fftGain = (float)(10.0 * Math.Log10(fftBins / (2.0 * audioDecimator.DecimationFactor)));
float offset = 24.0f - fftGain + _fftOffset;
if (e.IsComplex)
{
if (tmpBuffer == null || tmpBuffer.Length < e.Length)
{
tmpBuffer = DataBuffer.Create(e.Length, sizeof(float));
tmpBufferPtr = (float *)tmpBuffer;
}
fmDemod.process(e.ComplexBuffer, tmpBufferPtr, e.Length);
fmLpf.Process(tmpBufferPtr, e.Length);
audioDecimator.process(tmpBufferPtr, tmpBufferPtr, e.Length);
_audioFifo.Write(tmpBufferPtr, (int)(e.Length / audioDecimator.DecimationFactor));
sFFTDecimator.updateData(e.ComplexBuffer, e.Length);
sFFTDecimator.execute();
sFFTDecimator.copyOutput(e.ComplexBuffer, e.Length);
lock (powerBuffer) {
FFT.SpectrumPower(e.ComplexBuffer, powerDecimatorPtr, e.Length, offset);
}
}
}
private unsafe void D_SamplesAvailable(SamplesEventArgs e)
{
if (_fftStream.Length < maxIqSamples)
{
if (e.IsComplex)
{
_fftStream.Write(e.ComplexBuffer, e.Length);
}
else
{
Console.WriteLine("Weird, the buffer should be Complex");
}
}
else
{
Console.WriteLine("Buffer is full!");
}
}
private unsafe void audioBufferNeeded(SamplesEventArgs e)
{
float *audio = e.FloatBuffer;
int length = e.Length;
if (_audioFifo.Length >= length)
{
_audioFifo.Read(audioPtr, length);
for (int i = 0; i < length; i++)
{
audio[i * 2] = audioPtr[i] * 50000;
audio[i * 2 + 1] = audioPtr[i] * 50000;
}
}
else
{
for (int i = 0; i < length; i++)
{
audio[i * 2] = 0;
audio[i * 2 + 1] = 0;
}
}
}