public run ( float xRe, float xIm, bool inverse = false ) : void | ||
xRe | float | |
xIm | float | |
inverse | bool | |
Результат | void |
public void GetMidiCodes(int offset, int fftSize = 4096, int maxFreq = 5000) { AudioClip clip; float[] real, im, window; FloatFFT fft; string assetPath; float binWidth; List <FFTBinInfo> binInfos; int i; real = new float[fftSize]; im = new float[fftSize]; window = new float[fftSize]; GATMaths.MakeHammingWindow(window); fft = new FloatFFT(); fft.init(( uint )Mathf.Log(fftSize, 2)); binWidth = ( float )_sampleRate / fftSize; int maxBin = ( int )(( float )maxFreq / binWidth); foreach (GATSampleInfo info in _sampleInfos) { assetPath = AssetDatabase.GUIDToAssetPath(info.GUID); clip = AssetDatabase.LoadAssetAtPath(assetPath, typeof(AudioClip)) as AudioClip; if (clip.channels > 1) { throw new GATException("Get Midi Codes is a beta feature only available for mono clips"); } clip.GetData(real, offset); System.Array.Clear(im, 0, im.Length); fft.run(real, im); for (i = 0; i < maxBin; i++) { real[i] = Mathf.Sqrt(real[i] * real[i] + im[i] * im[i]); } binInfos = FFTBinInfo.GetLowerMaxBins(real, 0, maxBin, binWidth, .2f); info.MidiCode = binInfos[binInfos.Count - 1].GetMidiCode(); } SortByMidiCode(); }
/// <summary> /// Performs windowed in place real FFT of the passed /// data array, reusing a cached array for the /// imaginary part. /// Formats the specified frequency bins according to /// FFTOutput. /// </summary> public void RealFFT(float[] data) { int i; if (data.Length != _appliedFFTSize) { Debug.LogError("Expected data lengt: " + _appliedFFTSize + ", received " + data.Length); return; } if (useWindowFunction) { for (i = 0; i < _appliedFFTSize; i++) { data[i] *= _windowData[i]; } } _fft.run(data, _im, false); switch (output) { case FFTOutput.Decibels: ComputeDB(data); break; case FFTOutput.Magnitudes: ComputeMagnitudes(data); break; case FFTOutput.SquareMagnitudes: ComputeSquareMagnitudes(data); break; case FFTOutput.Real: break; } System.Array.Clear(_im, 0, _im.Length); //Clear imaginary part }
public void GetMidiCodes( int offset, int fftSize = 4096, int maxFreq = 5000 ) { AudioClip clip; float[] real, im, window; FloatFFT fft; string assetPath; float binWidth; List< FFTBinInfo > binInfos; int i; real = new float[ fftSize ]; im = new float[ fftSize ]; window = new float[ fftSize ]; GATMaths.MakeHammingWindow( window ); fft = new FloatFFT(); fft.init( ( uint )Mathf.Log ( fftSize, 2 ) ); binWidth = ( float )_sampleRate / fftSize; int maxBin = ( int )( ( float )maxFreq / binWidth ); foreach( GATSampleInfo info in _sampleInfos ) { assetPath = AssetDatabase.GUIDToAssetPath( info.GUID ); clip = AssetDatabase.LoadAssetAtPath( assetPath, typeof( AudioClip ) ) as AudioClip; if( clip.channels > 1 ) { throw new GATException( "Get Midi Codes is a beta feature only available for mono clips" ); } clip.GetData( real, offset ); System.Array.Clear( im, 0, im.Length ); fft.run( real, im ); for( i = 0; i < maxBin; i++ ) { real[ i ] = Mathf.Sqrt( real[ i ] * real[ i ] + im[ i ] * im[ i ] ); } binInfos = FFTBinInfo.GetLowerMaxBins( real, 0, maxBin, binWidth, .2f ); info.MidiCode = binInfos[ binInfos.Count - 1 ].GetMidiCode(); } SortByMidiCode(); }