public static SampleSource[] CreateFromWaveFile(string fileName)
{
using (var reader = new WaveFileReader(fileName))
{
ISampleProvider sp;
int sourceSamples;
if (reader.WaveFormat.Encoding == WaveFormatEncoding.Pcm)
{
if (reader.WaveFormat.BitsPerSample == 16)
{
sp = new Pcm16BitToSampleProvider(reader);
sourceSamples = (int)(reader.Length / 2);
}
else if (reader.WaveFormat.BitsPerSample == 24)
{
sp = new Pcm24BitToSampleProvider(reader);
sourceSamples = (int)(reader.Length / 3);
}
else
{
throw new ArgumentException("Currently only 16 or 24 bit PCM samples are supported");
}
}
else if (reader.WaveFormat.Encoding == WaveFormatEncoding.IeeeFloat)
{
sp = new WaveToSampleProvider(reader);
sourceSamples = (int)(reader.Length / 4);
}
else
{
throw new ArgumentException("Must be PCM or IEEE float");
}
float[] sampleData = new float[sourceSamples];
int n = sp.Read(sampleData, 0, sourceSamples);
if (n != sourceSamples)
{
throw new InvalidOperationException(String.Format("Couldn't read the whole sample, expected {0} samples, got {1}", n, sourceSamples));
}
SampleSource[] result = new SampleSource[9];
// Normal pitch
int normal = 4;
result[normal] = new SampleSource(sampleData, sp.WaveFormat);
int pitch = 5;
for (int currentPitch = 0; currentPitch < normal; currentPitch++, pitch--)
{
float[] changedPitchData = new float[sampleData.Length/pitch];
for (int j = 0, i = 0; i < sampleData.Length && j < changedPitchData.Length; i++)
{
if (i % pitch == 0)
{
changedPitchData[j] = sampleData[i];
j++;
}
}
result[currentPitch] = new SampleSource(changedPitchData, sp.WaveFormat);
}
pitch = 2;
for (int currentPitch = normal+1; currentPitch < result.Length; currentPitch++, pitch++)
{
float[] changedPitchData = new float[sampleData.Length * pitch];
for (int j = 0, i = 0; i < sampleData.Length && j < changedPitchData.Length; j++)
{
changedPitchData[j] = sampleData[i];
if (j % pitch == 0)
{
i++;
}
}
result[currentPitch] = new SampleSource(changedPitchData, sp.WaveFormat);
}
return result;
}
}
public MusicSampleProvider(SampleSource sampleSource)
{
this.sampleSource = sampleSource;
}
