public Mixer()
{
_oscillators = new List <IOscillator>();
header = new WaveHeader();
format = new WaveFormatChunk();
data = new WaveDataChunk();
_targetfile = System.IO.Path.GetTempFileName();
_numSamples = format.dwSamplesPerSec * 3 * format.wChannels;
data.shortArray = new short[_numSamples];
_sndp = new SoundPlayer();
}
private short[] RenderOscillator(IOscillator osc)
{
short[] data = new short[_numSamples];
double angle = (Math.PI * 2 * osc.OscFrequency) / (format.dwSamplesPerSec * format.wChannels);
switch (osc.Wavetype)
{
case WaveType.Sinus:
for (int i = 0; i < _numSamples; i++)
{
data[i] = Convert.ToInt16(osc.OscAmplitude * Math.Sin(angle * i));
}
break;
case WaveType.Square:
for (int i = 0; i < _numSamples; i++)
{
if (Math.Sin(angle * i) > 0)
{
data[i] = Convert.ToInt16(osc.OscAmplitude);
}
else
{
data[i] = Convert.ToInt16(-osc.OscAmplitude);
}
}
break;
case WaveType.Saw:
{
int samplesPerPeriod = Convert.ToInt32(format.dwSamplesPerSec / (osc.OscFrequency / format.wChannels));
short sampleStep = Convert.ToInt16((osc.OscAmplitude * 2) / samplesPerPeriod);
short tempSample = 0;
int i = 0;
int totalSamplesWritten = 0;
while (totalSamplesWritten < _numSamples)
{
tempSample = (short)-osc.OscAmplitude;
for (i = 0; i < samplesPerPeriod && totalSamplesWritten < _numSamples; i++)
{
tempSample += sampleStep;
data[totalSamplesWritten] = tempSample;
totalSamplesWritten++;
}
}
}
break;
case WaveType.Noise:
{
Random rnd = new Random();
for (int i = 0; i < _numSamples; i++)
{
data[i] = Convert.ToInt16(rnd.Next((int)-osc.OscAmplitude, (int)osc.OscAmplitude));
}
}
break;
case WaveType.None:
data = null;
break;
}
return(data);
}
