private void SetupSampleSource(ISampleSource aSampleSource)
{
const FftSize fftSize = FftSize.Fft64;
//create a spectrum provider which provides fft data based on some input
var spectrumProvider = new BasicSpectrumProvider(aSampleSource.WaveFormat.Channels,
aSampleSource.WaveFormat.SampleRate, fftSize);
//
////linespectrum and voiceprint3dspectrum used for rendering some fft data
////in oder to get some fft data, set the previously created spectrumprovider
_MusicSpectrum = new MusicSpectrum(fftSize)
{
SpectrumProvider = spectrumProvider,
UseAverage = true,
Count = 30,
IsXLogScale = true,
ScalingStrategy = ScalingStrategy.Sqrt
};
//_voicePrint3DSpectrum = new VoicePrint3DSpectrum(fftSize)
//{
// SpectrumProvider = spectrumProvider,
// UseAverage = true,
// PointCount = 200,
// IsXLogScale = true,
// ScalingStrategy = ScalingStrategy.Sqrt
//};
//
//the SingleBlockNotificationStream is used to intercept the played samples
var notificationSource = new SingleBlockNotificationStream(aSampleSource);
//pass the intercepted samples as input data to the spectrumprovider (which will calculate a fft based on them)
notificationSource.SingleBlockRead += (s, a) => spectrumProvider.Add(a.Left, a.Right);
_source = notificationSource.ToWaveSource(16);
}
private async Task <double> QueryAndHash(CancellationToken cancellationToken)
{
double queryLength = 0d;
Dictionary <int, Dictionary <int, int> > tmpMap = new Dictionary <int, Dictionary <int, int> >();
while (!realtimeCollection.IsAddingCompleted && !cancellationToken.IsCancellationRequested)
{
float[] audioSamples;
try
{
if (!realtimeCollection.TryTake(out audioSamples, MillisecondsDelay, cancellationToken))
{
continue;
}
}
catch (OperationCanceledException)
{
return(queryLength);
}
MusicSpectrum musicSpectrum = new MusicSpectrum(dataStorage);
int totalSize = audioSamples.Length;
int amountPossible = totalSize / 4096;
tmpMap = musicSpectrum.FFTAnalys(tmpMap, audioSamples, amountPossible);
var q = musicSpectrum.Matching(tmpMap);
Console.WriteLine(q.BestMath);
}
return(queryLength);
}
public IUsingFingerprintServices From(float[] audioSamples, Song song)
{
createFingerprintsMethod = () =>
{
MusicSpectrum music = new MusicSpectrum(dataStorageToUse);
music.InsertSongToDB(audioSamples, song);
};
return(this);
}
public IUsingFingerprintServices From(string pathToAudioFile)
{
createFingerprintsMethod = () =>
{
MusicSpectrum music = new MusicSpectrum(dataStorageToUse);
music.InsertSongToDB(audioServiceToUse, pathToAudioFile);
};
return(this);
}
public IUsingQueryModelService From(float[] audioSamples)
{
createQueryMethod = () =>
{
MusicSpectrum music = new MusicSpectrum(dataStorageToUse);
return(music.SeekSong(audioSamples));
};
return(this);
}
public IUsingQueryServices From(string pathToAudioFile)
{
createQueryMethod = () =>
{
MusicSpectrum music = new MusicSpectrum(dataStorageToUse);
return(music.SeekSong(audioServiceToUse, pathToAudioFile));
};
return(this);
}
