void Awake()
{
if (fftSize == FFTSize.Custom)
{
_appliedFFTSize = Mathf.NextPowerOfTwo(customFftSize);
if (_appliedFFTSize != customFftSize)
{
Debug.LogWarning("This FFT implementation only supports power of 2 lengths, defaulting to next possible value: " + _appliedFFTSize);
customFftSize = _appliedFFTSize;
}
}
else
{
_appliedFFTSize = GATInfo.AudioBufferSizePerChannel;
}
if (useWindowFunction)
{
SetWindow(window);
}
_im = new float[_appliedFFTSize]; //Shared imaginary part
_fft = new FloatFFT();
uint fftLogSize = ( uint )Mathf.Log(_appliedFFTSize, 2);
_fft.init(fftLogSize);
FirstOutputBinIndex = fromFrequency * _appliedFFTSize / GATInfo.OutputSampleRate;
LastOutputBinIndex = toFrequency * _appliedFFTSize / GATInfo.OutputSampleRate;
}
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();
}
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();
}
void Awake()
{
if( fftSize == FFTSize.Custom )
{
_appliedFFTSize = Mathf.NextPowerOfTwo( customFftSize );
if( _appliedFFTSize != customFftSize )
{
Debug.LogWarning("This FFT implementation only supports power of 2 lengths, defaulting to next possible value: "+_appliedFFTSize );
customFftSize = _appliedFFTSize;
}
}
else
{
_appliedFFTSize = GATInfo.AudioBufferSizePerChannel;
}
if( useWindowFunction )
{
SetWindow( window );
}
_im = new float[ _appliedFFTSize ]; //Shared imaginary part
_fft = new FloatFFT();
uint fftLogSize = ( uint )Mathf.Log ( _appliedFFTSize, 2 );
_fft.init( fftLogSize );
FirstOutputBinIndex = fromFrequency * _appliedFFTSize / GATInfo.OutputSampleRate;
LastOutputBinIndex = toFrequency * _appliedFFTSize / GATInfo.OutputSampleRate;
}
