public override int Read(float[] buffer, int offset, int count)
{
//if (phase > 1.0f)
//{
// //Console.WriteLine("Phase reset {0}", phase);
// phase = phase % 1.0f;
//}
float phaseinc = (1.0f / _samplerate);
float phaseinc2 = 0;
float t = 0;
float sine = 0;
float[] frequencysamples = new float[buffer.Length];
float[] amplitudesamples = new float[buffer.Length];
float[] phaseoffsetsamples = new float[buffer.Length];
float[] originsamples = new float[buffer.Length];
Frequency.Read(frequencysamples, offset, count);
Amplitude.Read(amplitudesamples, offset, count);
PhaseOffset.Read(phaseoffsetsamples, offset, count);
Origin.Read(originsamples, offset, count);
float freq = 0;
float amp = 0;
float offsetphase = 0;
float origin = 0;
float value = 0;
float twopi = (float)Math.PI * 2;
for (int i = offset; i < count; i++)
{
freq = frequencysamples[i];
amp = amplitudesamples[i];
//if (phase > freq)
//{
// phase = phase % (1.0f / freq);
//}
phaseinc2 = (1.0f / (_samplerate)) * freq;
offsetphase = (phase + phaseoffsetsamples[i]);
origin = originsamples[i];
switch (this.waveform)
{
case WaveType.SineWave:
value = (float)(Math.Sin(offsetphase * twopi));
break;
case WaveType.SquareWave:
t = (float)((offsetphase));
if (t < 0.5)
{
value = -1.0f;
}
else
{
value = 1.0f;
}
break;
case WaveType.TriangleWave:
t = (float)((offsetphase));
if (t <= 0.5)
{
value = -1.0f + (4 * t);
}
else
{
value = 1.0f - (4 * (t - 0.5f));
}
break;
case WaveType.SawtoothWave:
t = (float)((offsetphase));
value = -1.0f + (2 * t);
break;
case WaveType.InverseSawtoothWave:
t = (float)((offsetphase));
value = 1.0f - (2 * t);
break;
case WaveType.PulseWaveHalf:
t = (float)((offsetphase));
if (t < 0.25)
{
value = -1.0f;
}
else
{
value = 1.0f;
}
break;
case WaveType.PulseWaveQuarter:
t = (float)((offsetphase));
if (t < 0.125)
{
value = -1.0f;
}
else
{
value = 1.0f;
}
break;
default:
value = 0;
break;
}
buffer[i] = origin + (amp * value);
phase = (phase + phaseinc2) % 1.0f;
}
return(count);
}