private static void OperatorInnitEmptyWave(WaveChunk waveL, WaveChunk waveR, out WaveChunk newWave, out uint minNSamples)
{
if (waveL._sampleRate != waveR._sampleRate)
{
throw new ArgumentException("Waves have different sampling rates");
}
newWave = waveL.NumSamples > waveR.NumSamples ? new WaveChunk(waveL._sampleRate, waveL.NumSamples) : new WaveChunk(waveR._sampleRate, waveR.NumSamples);
minNSamples = Math.Min(waveL.NumSamples, waveR.NumSamples);
}
private static void OperatorInnitCopyWave(WaveChunk waveL, WaveChunk waveR, out WaveChunk newWave, out WaveChunk smallerWave)
{
if (waveL._sampleRate != waveR._sampleRate)
{
throw new ArgumentException("Waves have different sampling rates");
}
newWave = waveL.NumSamples > waveR.NumSamples ? new WaveChunk(waveL) : new WaveChunk(waveR);
smallerWave = waveL.NumSamples > waveR.NumSamples ? waveR : waveL;
}
public static WaveChunk operator*(WaveChunk wave, float mult)
{
WaveChunk retWave = new WaveChunk(wave);
for (uint i = 0; i < wave.NumSamples; i++)
{
retWave[i] *= mult;
}
return(retWave);
}
static private WaveChunk MakeSquareWave(WaveAttributes waveAttributes)
{
WaveChunk wave = MakeSineWave(waveAttributes);
uint nSamples = wave.NumSamples;
for (uint i = 0; i < nSamples; i++)
{
wave[i] = Math.Sign(wave[i]);
}
return(wave);
}
static public short[] Get16BitArray(WaveChunk wave)
{
ulong nSamples = wave.NumSamples;
short[] arr = new short[nSamples];
for (uint i = 0; i < nSamples; i++)
{
arr[i] = (short)(wave[i] * short.MaxValue);
}
return(arr);
}
static private WaveChunk MakeWhiteNoise(WaveAttributes waveAttr)
{
WaveChunk wave = new WaveChunk(waveAttr.WaveSampleRate, waveAttr.Runtime);
uint numSamples = wave.NumSamples;
Random random = new Random();
for (uint i = 0; i < numSamples; i++)
{
wave[i] = (float)(2 * random.NextDouble() - 1);
}
return(wave);
}
static private WaveChunk MakeSineWave(WaveAttributes waveAttributes)
{
WaveChunk wave = new WaveChunk(waveAttributes.WaveSampleRate, waveAttributes.Runtime);
uint numSamples = wave.NumSamples;
double t = (Math.PI * 2 * waveAttributes.TargetFrequency) / (uint)waveAttributes.WaveSampleRate;
for (uint i = 0; i < numSamples; i++)
{
wave[i] = (float)Math.Sin(t * i);
}
return(wave);
}
private static WaveChunk MakeTriangle(WaveAttributes waveAttr)
{
WaveChunk wave = new WaveChunk(waveAttr.WaveSampleRate, waveAttr.Runtime);
uint numSamples = wave.NumSamples;
float step = (float)(1 / (double)waveAttr.WaveSampleRate * 4 * waveAttr.TargetFrequency);
wave[0] = 0.0f;
for (uint i = 1; i < numSamples; i++)
{
var next = wave[i - 1] + step;
if (Math.Abs(next) > 1.0f)
{
step = -step;
}
wave[i] = wave[i - 1] + step;
}
return(wave);
}
private static WaveChunk MakeSawtooth(WaveAttributes waveAttr)
{
WaveChunk wave = new WaveChunk(waveAttr.WaveSampleRate, waveAttr.Runtime);
uint numSamples = wave.NumSamples;
var step = 1 / (double)waveAttr.WaveSampleRate * 2 * waveAttr.TargetFrequency;
wave[0] = 0.0f;
for (uint i = 1; i < numSamples; i++)
{
var next = wave[i - 1] + (float)step;
if (next > 1.0f)
{
wave[i] = -1.0f;
}
else
{
wave[i] = next;
}
}
return(wave);
}
public WaveChunk(WaveChunk wave) : this(wave._sampleRate, wave.NumSamples)
{
wave._data.CopyTo(this._data, 0u);
}