/// <summary>
/// Creates Real-Time FFT analyzer.
/// </summary>
/// <param name="source">Specified audio provider.</param>
/// <param name="bufferSize">Fft input/ output buffer size should be bigger than input data, possibly equal to fftlength</param>
/// <param name="fftLength">Length of FFT.</param>
/// <param name="real">True if input is real</param>
public FastLiveFftAnalyzer(IFloatProvider source, int bufferSize = 1000000, int fftLength = 16384,
bool real = true)
{
if (!IsPowerOfTwo(fftLength))
{
throw new ArgumentException("FFT Length must be a power of two");
}
_source = source;
_source.FloatChunkRecieved += FloatChunkRecieved;
WaveFormat = new WaveFormat(_source.SamplingRate(), _source.Bits(), _source.ChannelCount());
FftLength = fftLength;
_in = new float[bufferSize]; //DEFAULT: max buffer is 1M Real/ 512k Complex sample
_out = new float[bufferSize]; //DEFAULT: max buffer is 1M Real/ 512k Complex sample
_handleIn = GCHandle.Alloc(_in, GCHandleType.Pinned);
_handleOut = GCHandle.Alloc(_out, GCHandleType.Pinned);
_args.Update(_out, fftLength * 2);
_handlePlan = real
? fftwf.dft_r2c_1d(fftLength, _handleIn.AddrOfPinnedObject(),
_handleOut.AddrOfPinnedObject(),
fftw_flags.Patient)
: fftwf.dft_1d(fftLength, _handleIn.AddrOfPinnedObject(), _handleOut.AddrOfPinnedObject(),
fftw_direction.Forward, fftw_flags.Patient);
}
/// <summary>
/// <para>
/// Creates a <see cref="Builder" /> with <paramref name="configurement" />.
/// </para>
/// </summary>
/// <param name="configurement">
/// The configuration for the <see cref="Builder" />.
/// </param>
public Builder(Configurement configurement)
{
_doubleProvider = configurement.DoubleProvider;
_intProvider = configurement.IntProvider;
_longProvider = configurement.LongProvider;
_nameProvider = configurement.NameProvider;
_dateTimeProvider = configurement.DateTimeProvider;
_emailProvider = configurement.MailProvider;
_elementProvider = configurement.ListElementPicker;
_boolProvider = configurement.BoolProvider;
_userNameProvider = configurement.UserNameProvider;
_guidProvider = configurement.GuidProvider;
_timeSpanProvider = configurement.TimeSpanProvider;
_decimalProvider = configurement.DecimalProvider;
_dateTimeOffsetProvider = configurement.DateTimeOffSetProvider;
_floatProvider = configurement.FloatProvider;
_charProvider = configurement.CharProvider;
}
