open_dspc library

Classes

Autocorr
CfftPlan: Reusable complex-input FFT plan (c2c) with internal native buffers.
Complex32List: A complex-valued vector backed by separate real and imaginary arrays.
Complex64List: A complex-valued vector backed by Float64x2 elements.
Conv
FftConvolver: Reusable FFT-based convolution context for repeated calls.
FFTStatic: One-shot static FFT utilities.
Filter
FindPeaksProperties
FindPeaksResult
Lpc
Polyfitter
Resample: Convenience API for one-off resampling operations.
Resampler: Reusable native resampler with cached context and buffers.
RfftPlan: Reusable real-input FFT plan (r2c) with internal native buffers.
SignalGenerator
SignalGenerator64
STFT
STFTFrames: Complex STFT output stored as contiguous frame-major real and imaginary bins.
STFTSpecFrames: Scalar STFT output stored as contiguous frame-major bins.

CoeffMode
ConvMode
CorrOutMode
LpcMethod
MelNorm
MelScale
ResamplingMethod
SpecMode: Output representation for scalar spectra.
StftWindow: Window shape applied to each STFT frame before the FFT.
WindowType: Supported scalar window functions for frame-based DSP operations.

applyWindow(Float32List input, {WindowType type = WindowType.hann, bool periodic = true}) → Float32List: Returns a new array containing input multiplied by a generated window.
applyWindowInPlace(Float32List input, {WindowType type = WindowType.hann, bool periodic = true}) → void: Multiplies input in place by a generated window.
blackmanWindow(int length, {bool periodic = true}) → Float32List
find_peaks(List<num> x, {Object? height, Object? threshold, double? distance, Object? prominence, Object? width, int? wlen, double rel_height = 0.5, Object? plateau_size}) → FindPeaksResult: Finds local maxima in a 1-D signal using the native peak finder.
frameToMel(Float32List input, {required int sr, int numMels = 80, double fmin = 0, double? fmax, MelScale scale = MelScale.htk, MelNorm norm = MelNorm.none}) → Float32List
generateWindow(int length, {WindowType type = WindowType.hann, bool periodic = true}) → Float32List: Returns a window of length for the selected type.
hammingWindow(int length, {bool periodic = true}) → Float32List
hannWindow(int length, {bool periodic = true}) → Float32List
multiplyWithWindow(Float32List input, Float32List window) → Float32List: Returns a new array containing input[n] * window[n].
multiplyWithWindowInPlace(Float32List input, Float32List window) → void: Multiplies input by window in place.
rectWindow(int length, {bool periodic = true}) → Float32List