public Preprocessing(int samplingFrequency, int step)
{
shortWindow = new PreprocessingWindow(SHORT_SAMPLE, samplingFrequency, step);
mediumWindow = new PreprocessingWindow(MEDIUM_SAMPLE, samplingFrequency, step);
longWindow = new PreprocessingWindow(LONG_SAMPLE, samplingFrequency, step);
this.Step = step;
this.SamplingFrequency = samplingFrequency;
sample = 0;
buffer = new double[LONG_SAMPLE];
bufferPosition = 0;
}
private static double[] CalculateEnergies(TrackInfo trackInfo)
{
using (WaveFile wave = trackInfo.GetWaveFile())
{
wave.Open();
Debug.Assert(wave.SampleRate == 44100);
PreprocessingWindow window = new PreprocessingWindow(512, 44100, AccuracyInSamples);
double[] samples = new double[wave.Length + 512];
double[] result = new double[wave.Length / AccuracyInSamples];
Debug.Assert(wave.Read(samples) == wave.Length);
double[] bands = new double[window.OutputSize];
for (int i = 0; i < result.Length; i++)
{
window.Process(samples, i * AccuracyInSamples);
window.PrepareDifferenceFrame(bands, 0);
result[i] = bands.Sum();
}
return(result);
}
}
