/// <summary>
/// Creates Real-Time FFT analyzer.
/// </summary>
/// <param name="source">Specified audio provider.</param>
/// <param name="fftLength">Length of FFT.</param>
public LiveFftAnalyzer(IAudioProvider source, int fftLength = 16384, bool real = true)
{
_real = real;
FftLength = fftLength;
_channels = source.ChannelCount();
if (!IsPowerOfTwo(fftLength))
{
throw new ArgumentException("FFT Length must be a power of two");
}
_m = (int)Math.Log(fftLength, 2.0);
_fftLength = fftLength;
FftPlan(_fftLength);
_fftBuffer = new Complex[fftLength];
_fftArgs = new FftEventArgs(_fftBuffer);
_source = source;
_source.DataChunkRecieved += DataChunkRecieved;
if (_source is IFloatProvider)
{
(_source as IFloatProvider).FloatChunkRecieved += FloatChunkRecieved;
}
WaveFormat = new WaveFormat(_source.SamplingRate(), _source.Bits(), _source.ChannelCount());
_converter = new FloatConverter(_source.SamplingRate(), _source.Bits(), _source.ChannelCount());
_step = _channels * _converter.Step();
}
/// <summary>
/// Rasises <see cref="FftCalculated"/>
/// </summary>
/// <param name="e">FFT data.</param>
protected virtual void OnFftCalculated(FftEventArgs e)
{
EventHandler <FftEventArgs> handler = FftCalculated;
if (handler != null)
{
handler(this, e);
}
}
/// <summary>
/// Creates a FFT analyzer.
/// </summary>
/// <param name="fft">FFT raw data.</param>
/// <param name="parameters">Specified bin parameters.</param>
/// <param name="real"></param>
public FrequencyBins(FftEventArgs args, BinParameters parameters, bool real = true)
{
_realMode = real;
Complex[] fft = args.Result;
_parameters = parameters;
_relativeFrequency = _parameters.Relative ? real ? _parameters.SamplingRate / 4 : _parameters.SamplingRate / 2 : 0;
_precision = _parameters.SamplingRate / (double)fft.Length;
FillBins(fft, real);
}
public SampleAggregator(ISampleProvider source, int fftLength = 4096)
{
_channels = source.WaveFormat.Channels;
if (!IsPowerOfTwo(fftLength))
{
throw new ArgumentException("FFT Length must be a power of two");
}
_m = (int)Math.Log(fftLength, 2.0);
_fftLength = fftLength;
_fftBuffer = new Complex[fftLength];
_fftArgs = new FftEventArgs(_fftBuffer);
_source = source;
}
public override void Update(FftEventArgs args)
{
FillBins(args.Result);
}
public virtual void Update(FftEventArgs args)
{
FillBins(args.Result);
}
/// <summary>
/// Creates a FFT analyzer.
/// </summary>
/// <param name="fft">FFT raw data.</param>
/// <param name="parameters">Specified bin parameters.</param>
/// <param name="real"></param>
public FastFrequencyBins(FftEventArgs args, BinParameters parameters, bool real = true)
: this(parameters, args.Result.Length, real)
{
Update(args);
}
public ApproximateFrequencyBins(FftEventArgs args, BinParameters parameters, bool real = true)
: base(args, parameters, real)
{
}