KFR 7.1.0

Added

• ngfft: new low-overhead FFT API with manual memory management
• GCC and MSVC support for DFT
• filter::apply_zeros function
• operator== for portable_vec
• reset() support for stateful DSP expressions
• KFR_BASETYPE_F32 cmake option for 32-bit fbase
• New member functions and type aliases for audio_data: apply_gain_dB, normalize, clamp, to_mono, to_interleaved, to_planar, select_channel, select_channels, and clone
• audio_filter for independent multi-channel FIR, IIR, and convolution filtering of planar audio_data
• Core Audio decoder for macOS and iOS, with binary_reader input, floating-point output, and precise frame seeking
• Automatic snippet testing via cxxdox
• Additional tests, including generic backend

Changed

• FFT performance for power-of-two sizes has been improved by up to 40%
• FFT performance for sizes with many prime factors has been improved by switching to a more optimized algorithm
• Bit-index permutation optimizations for Clang and the generic backend
• Compiler support information updated
• Code documentation (Doxygen-style) now has near 100% coverage
• Major documentation update with dozens of new articles and automatically tested code examples
• MSVC: Handle DFT compilation options correctly
• Refactor Python plotting functionality
• expression_reduce now accepts parameters by value
• [Breaking change] uitype meaning changed to convert only from float to unsigned integer
• Update cxxdox to 0.2.1

Fixed

• Fix bugs and improve performance in generic backend
• Avoid unaligned integer access in SIMD operations
• Fix signed/unsigned shift
• Fix NaN handling in generic backend
• Fix return type in make_vector function to use fix_type
• Fix arange function
• Fix isnegative function
• Fix cartesian function
• Fix expression_concatenate
• Fix audio_data interleaved constructor
• Fix incorrect comparison in c_mantissa_bits
• Add missing config.h include in capi.h
• Fix sample_rate_converter; add tests
• Don't emit deprecation warning for template instantiation
• Add -Wno-nan-infinity-disabled compiler flag for compatibility
• Remove Windows build script for CAPI (use CMake only)