KFR¶

Features¶

All code in the library is optimized for Intel, AMD (SSE2, SSE3, SSE4.x, AVX and AVX2 and AVX512) and ARM (NEON) processors
Mathematical and statistical functions
Template expressions (See examples)
All data types are supported including complex numbers
All vector lengths are also supported. vec<float,1>, vec<unsigned,3>, vec<complex<float>, 11> all are valid vector types in KFR
Most of the standard library functions are re-implemented to support vector of any length and data type and to support expressions
Runtime cpu detection
C API: DFT, real DFT, DCT, FIR and IIR filters and convolution, memory allocation
Built for SSE2, SSE4.1, AVX, AVX2, AVX512, x86 and x86_64, architecture is selected at runtime
Can be used with any compiler and any language with ability to call C functions
Prebuilt Windows binaries

FFT
DCT
Convolution
FIR filtering
FIR filter design using the window method
Resampling with configurable quality (See resampling.cpp from Examples directory)
IIR filter design
Butterworth
Chevyshev I and Chevyshev II
Bessel
Low pass, high pass, band pass, band stop
Convert arbitrary filter from Z, P, K format to SOS suitable for biquad function
Goertzel algorithm
Fractional delay
Biquad filtering
Biquad design functions
Oscillators: Sine, Square, Sawtooth, Triangle
Window functions: Triangular, Bartlett, Cosine, Hann, Bartlett-Hann, Hamming, Bohman, Blackman, Blackman-Harris, Kaiser, Flattop, Gaussian, Lanczos, Rectangular
Audio file reading/writing (wav, flac, mp3)
Pseudorandom number generator
Sorting
Color space conversion (sRGB, XYZ, Lab, LCH)
Ring (Circular) buffer
Simple waveshaper
Fast incremental sine/cosine generation
EBU R 128

Xcode	Visual Studio	Clang	GCC	Intel Compiler
9+	2017	6+	7+	Experimental

Tested on macOS, Windows (MinGW, MSYS and MSVC), Linux, iOS, Android.

x86, x86_64	ARM, ARM64
Scalar, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512	Scalar, NEON, NEON64