5.0.1

• New tensor<T, dims> class for multidimensional data (like numpy's nparray)
• Histogram computation
• Normal (gaussian) distribution for random number generator
• Documentation updates
• All builtin expressions support multiple dimensions
• Exception support (may be configured to call user-supplied function or std::abort)
• [changes required] CMake variables now have KFR_ prefix
• Template parameter deduction for vec, so vec{1, 2} is the same as vec<int, 2>{1, 2}
• [changes required] random_state is now architecture-agnostic and defined in kfr namespace
• All expression classes have been moved from kfr::CMT_ARCH_NAME::internal to kfr::CMT_ARCH_NAME namespace
• expression_traits<T> introduced to support interpreting any object as kfr expression
• [changes required] User-defined expressions should be rewritten to be used in KFR5
• Out-of-class assign operators for all input & output expressions
• round.hpp, clamp.hpp, select.hpp, sort.hpp, saturation.hpp, min_max.hpp, logical.hpp, abs.hpp headers have been moved to simd module
• state_holder.hpp has been moved to base module
• All code related to expressions have been moved to base module
• vec<T, N>::front() and vec<T, N>::front() are now writable
• set_elements functions for output expressions like get_elements for input expressions

5.0.0

• New tensor<T, dims> class for multidimensional data (like numpy's nparray)
• histogram computation
• normal (gaussian) distribution for random number generator
• All builtin expressions support multiple dimensions
• Exception support (may be configured to call user-supplied function or std::abort)
• [changes required] CMake variables now have KFR_ prefix
• Template parameter deduction for vec, so vec{1, 2} is the same as vec<int, 2>{1, 2}
• [changes required] random_state is now architecture-agnostic and defined in kfr namespace
• All expression classes have been moved from kfr::CMT_ARCH_NAME::internal to kfr::CMT_ARCH_NAME namespace
• expression_traits<T> introduced to support interpreting any object as kfr expression
• [changes required] User-defined expressions should be rewritten to be used in KFR5
• Out-of-class assign operators for all input & output expressions
• round.hpp, clamp.hpp, select.hpp, sort.hpp, saturation.hpp, min_max.hpp, logical.hpp, abs.hpp headers have been moved to simd module
• state_holder.hpp has been moved to base module
• All code related to expressions have been moved to base module
• vec<T, N>::front() and vec<T, N>::front() are now writable
• set_elements functions for output expressions like get_elements for input expressions

4.3.1

C++20 compatibility fixes for v4 branch

4.3.0

Changed

• Compile times improved and memory usage reduced for MSVC and GCC
• cxxdox version updated
• Tests for latest Clang, Azure Pipelines images are updated
• .editorconfig file

Fixed

• Fixed incompatibility with latest GCC
• Fixed various Internal Compiler Error in latest MSVC2019
• Fixed tests for Clang 14
• Fixed bugs in gather/scatter and read/write functions

4.2.1

Various fixes and performance improvements.

4.2.0

Added

• ENABLE_DFT_MULTIARCH cmake option can be used to build kfr_dft with multiple architectures support (x86/x86_64 only)
• config.h is generated during install step with all #defines needed for correct usage of installed libraries

Changed

• CMAKE_INSTALL_PREFIX is reset to empty on Win32 (can be overriden in cmake command line)
• C API binary is now installed using install command (make install, ninja install or cmake --build . --target install)

4.1.0

Added

• MSVC2019 support (16.4.4 is required)
• Stateless short_fir expression (thanks to https://github.com/slarew)
• biquad_filter constructor taking std::vector<biquad_params<T>> (thanks to https://github.com/BenjaminNavarro)
• cabssqr function (thanks to https://github.com/slarew)
• moving_sum expression (thanks to https://github.com/slarew)
• gen_expj generator (thanks to https://github.com/slarew)

Changed

• cdirect_t{} is now allowed in real dft plan methods for compatibility
• complex support for convolve_filter (thanks to https://github.com/slarew)

Fixed

• GCC debug build (thanks to https://github.com/BenjaminNavarro)
• is_invocable_r_impl fallback for missing C++17 feature
• std::complex compatibility (thanks to https://github.com/slarew)
• Various CI fixes

4.0.0

• IIR filter design
  • Butterworth
  • Chebyshev type I and II
  • Bessel
  • Lowpass, highpass, bandpass and bandstop filters
  • Conversion of arbitrary filter from Z,P,K to SOS format (suitable for biquad function and filter)
• Discrete Cosine Transform type II (and its inverse, also called DCT type III)
• cmake uninstall target (thank to @acxz)
• 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
• C++17
  • Inline variables
  • Fold expressions
  • Structured binding
• New vector based types: color, rectangle, point, size, border, geometric vector, 2D matrix
• Color space conversion (sRGB, XYZ, Lab, LCH)
• MP3 file reading (using third party dr_lib library, see source code for details)
• Various optimizations and fixes (thank to @bmanga, @ncorgan, @rotkreis, @mujjingun for fixes and bug reports)

Release notes

• MSVC support is limited to MSVC2017 due to ICE in MSVC2019. Once fixed, support will be added
• DFT is limited to Clang due to ICE in MSVC and broken AVX optimization in GCC 8 and 9. Once fixed, support will be added

See full change log in CHANGELOG.md

4.0.0-rc

• IIR filter design
  • Butterworth
  • Chebyshev type I and II
  • Bessel
  • Lowpass, highpass, bandpass and bandstop filters
  • Conversion of arbitrary filter from Z,P,K to SOS format (suitable for biquad function and filter)
• Discrete Cosine Transform type II (and its inverse, also called DCT type III)
• cmake uninstall target (thank to @acxz)
• 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
• C++17
  • Inline variables
  • Fold expressions
  • Structured binding
• New vector based types: color, rectangle, point, size, border, geometric vector, 2D matrix
• Color space conversion (sRGB, XYZ, Lab, LCH)
• MP3 file reading (using third party dr_lib library, see source code for details)
• Various optimizations and fixes (thank to @bmanga, @ncorgan, @rotkreis, @mujjingun for fixes and bug reports)

Release notes

• MSVC support is limited to MSVC2017 due to ICE in MSVC2019. Once fixed, support will be added
• DFT is limited to Clang due to ICE in MSVC and broken AVX optimization in GCC 8 and 9. Once fixed, support will be added

3.0.9

Changes since KFR 3.0.8

Added

• reduce supports different types and containers other than univector
• Assignment operators for univector: +=, *= etc
• concatenate function to concatenate two expressions sequentially
• Audio file IO: read_channels/write_channels to read channels data directly without interleaving/deinterleaving
• as_string: support for std::vector

Changed

• expression_scalar: support for vec<T>

Fixed

• CPU detection in cmake subdirectory
• MSVC 2017 32-bit intrinsics