private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
Oscillator tmp;
OscillatorPanel.Children.Clear();
mixer.Oscillators.Clear();
for (int i = 0; i < NUM_GENERATORS; i++)
{
tmp = new Oscillator();
OscillatorPanel.Children.Add(tmp);
mixer.Oscillators.Add(tmp);
}
}
public OscillatorData(Oscillator osc, short[] data)
{
oscillator = osc;
sampleData = data;
}
public short[] GenerateOscillatorSampleData(Oscillator osc)
{
// Creates a looping buffer based on the params given
// Fill the buffer with whatever waveform at the specified frequency
int numSamples = Convert.ToInt32(bufferDurationSeconds * SAMPLE_RATE);
short[] sampleData = new short[numSamples];
double frequency = osc.Frequency;
int amplitude = osc.Amplitude;
double angle = (Math.PI * 2 * frequency) / (SAMPLE_RATE * CHANNELS);
switch (osc.WaveType)
{
case WaveType.Sine:
{
for (int i = 0; i < numSamples; i++)
{
// Generate a sine wave in both channels.
sampleData[i] = Convert.ToInt16(amplitude * Math.Sin(angle * i));
}
}
break;
case WaveType.Square:
{
for (int i = 0; i < numSamples; i++)
{
// Generate a square wave in both channels.
if (Math.Sin(angle * i) > 0)
{
sampleData[i] = Convert.ToInt16(amplitude);
}
else
{
sampleData[i] = Convert.ToInt16(-amplitude);
}
//sampleData[i] = Convert.ToInt16(maxAmplitude * Math.Floor(Math.Sin(angle * i)));
}
}
break;
case WaveType.Sawtooth:
{
int samplesPerPeriod = Convert.ToInt32(SAMPLE_RATE / (frequency / CHANNELS));
short sampleStep = Convert.ToInt16((amplitude * 2) / samplesPerPeriod);
short tempSample = 0;
int i = 0;
int totalSamplesWritten = 0;
while (totalSamplesWritten < numSamples)
{
tempSample = (short)-amplitude;
for (i = 0; i < samplesPerPeriod && totalSamplesWritten < numSamples; i++)
{
tempSample += sampleStep;
sampleData[totalSamplesWritten] = tempSample;
totalSamplesWritten++;
}
}
}
break;
case WaveType.Noise:
{
Random rnd = new Random();
for (int i = 0; i < numSamples; i++)
{
sampleData[i] = Convert.ToInt16(rnd.Next(-amplitude, amplitude));
}
}
break;
}
return(sampleData);
}