dsp

func Dispose ¶

func Dispose()

func FFT ¶

func FFT(
	samples []float64,
	freqArrayWidth int,
	n_bin int,
	windowFn func([]float64) []float64,
	isDFT bool,
) (freqArray []float64)

func FloatSampleToByteArray ¶

func FloatSampleToByteArray(inB [][2]float64, outB []byte)

func Freq2NBin ¶

func Freq2NBin(freq float64, sampleRate, n_bin int) int

Freq -> FFT N Bin

func LTTB ¶

func LTTB(ctx context.Context, x []float64, y []float64, threshold int) ([]float64, []float64, error)

LTTB down-samples the data to contain only threshold number of points that have the same visual shape as the original data

func LTTB_Buffer ¶

func LTTB_Buffer(ctx context.Context, x, y, outx, outy []float64, threshold int) ([]float64, []float64, error)

LTTB down-samples the data to contain only threshold number of points that have the same visual shape as the original data (With Output Buffer)

func Mel ¶

func Mel(freq float64) float64

func MonoToStereo ¶

func MonoToStereo(in []float64) [][2]float64

func NBin2Freq ¶

func NBin2Freq(i, sampleRate, n_bin int) float64

FFT N Bin -> Freq

func ParallelFFT ¶

func ParallelFFT(
	ctx context.Context,
	samples []float64,
	sampleRate int,
	freqArrayWidth int,
	n_bin int,
	windowFn func([]float64) []float64,
	isDFT bool,
) (freqArray []float64)

func StereoToMono ¶

func StereoToMono(in [][2]float64) []float64