Module filtering 

Digital filtering functions (FIR, Biquad IIR Direct Form I & II, LMS Adaptive Filter, Convolution, Correlation).

Structs

BiquadCascadeInstanceF32

Instance structure for the floating-point Biquad Cascade Direct Form I filter.

CircularBuffer

Const-generic zero-allocation circular buffer and delay line for real-time DSP sample streams.

FirInstanceF32

Instance structure for the floating-point FIR filter.

FirInstanceQ15

Instance structure for the Q15 FIR filter.

FirInstanceQ31

Instance structure for the Q31 FIR filter.

LmsInstanceF32

Instance structure for the floating-point LMS adaptive filter.

RecursiveMovingAverage

Const-generic N-point moving average filter implemented recursively (Steven W. Smith, Ch. 15, Eq. 15-3): each sample is updated with a single add and subtract, instead of an O(N) convolution sum.

SinglePoleFilter

The cheapest possible IIR filter: a single-pole recursive low-pass or high-pass filter (Steven W. Smith, Ch. 19, Eq. 19-2 / 19-3), needing only one or two multiplies per sample. Coefficients are designed from a decay factor x (see crate::filter_design::single_pole_decay_from_cutoff / crate::filter_design::single_pole_decay_from_time_constant).

Functions

biquad_cascade_df1_f32

conv_f32

conv_q7

conv_q15

conv_q31

correlate_f32

correlate_q15

correlate_q31

fast_convolve_f32

Performs fast linear convolution of signal and kernel via FFT multiplication. Output length is signal.len() + kernel.len() - 1.

fir_f32

fir_q15

fir_q31

lms_f32

median_filter_1d_f32

1D Conditional / Thresholded Median Filter for f32.

median_filter_1d_q15

1D Conditional Median Filter for Q15.

median_filter_1d_q31

1D Conditional Median Filter for Q31.