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PulseWave.cs
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PulseWave.cs
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using Chroma.Audio;
using System;
namespace ChromaSynth
{
public class PulseWave : Waveform
{
private float duty = 0.66666f;
public float Duty
{
get { return duty; }
set { duty = value < 0 ? 0 : value > 1 ? 1 : value; }
}
private float LastT = 0.0f;
public PulseWave(AudioManager audioManager, float frequency, float volume = 1.0f) : base(audioManager, SynthWaveform.Square, frequency, volume) {}
public override float[] GenerateSamples()
{
int flip = (int)((ChunksPerSecond * AudioManager.ChunkSize) / Frequency / (1.0 / duty));
int period = (int)((ChunksPerSecond * AudioManager.ChunkSize) / Frequency);
for (var i = 0; i < Samples.Length; i += 2)
{
if(Frequency == 0)
{
Samples[i] = 0;
Samples[i + 1] = 0;
continue;
}
if (((i / 2) + LastT) % period < flip)
{
Samples[i] = Math.Min(1, (2 * (1 - LeftRightBalance))) * Volume;
Samples[i + 1] = Math.Min(1, (2 * LeftRightBalance)) * Volume;
}
else
{
Samples[i] = Math.Min(1, (2 * (1 - LeftRightBalance))) * -Volume;
Samples[i + 1] = Math.Min(1, (2 * LeftRightBalance)) * -Volume;
}
if (i + 2 >= Samples.Length)
{
LastT += i / 2;
while (LastT > period)
LastT -= period;
}
}
return Samples;
}
}
}