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Changelog

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dlevin256 committed Dec 5, 2019
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# Changelog

## 4.0.0

2019-12-05

#### Added

- 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 III
- cmake uninstall target
- C API:
- DFT
- real DFT
- DCT
- FIR
- IIR
- Convolution
- Aligned memory allocation
- Built for SSE2, SSE4.1, AVX, AVX2, AVX512, x86 and x86_64, architecture is selected at runtime
- New vector based types:
- color
- rectangle
- point
- size
- border
- geometric vector
- 2D matrix
- Color space conversion:
- sRGB
- linear RGB
- XYZ
- Lab
- LCH
- HSV
- MP3 audio reading
- `aligned_reallocate` function
- `zip` and `column` functions
- `vec<vec<vec<T>>>` support
- New example: `iir.cpp`
- `biquad` that gets `std::vector` of `biquad_param`s
- `csqr` function
- `factorial` function
- `isreal` function
- `make_complex` function for expressions
- New optimization technique for vector element shuffle
- `std::get<>` support for `vec<>`
- C++17 structured bindings support for `vec<>`
- comparison operators for `cvals_t`
- compile time `cminof`, `cmaxof` functions
- `vector_width_for` constant to get vector width for specific architecture
- make_univector for containers and arrays
- univector: copy constructor optimization
- Custom `assertion_failed`

#### Changed

- C++17 compiler is required. Some of C++17 library features may be missing, in this case KFR uses custom implementation
- `cast` function now works with both vectors and expressions (expression versions was previously called `convert`)
- Memory alignment can be up to 32768
- New implementation for `cometa::function` using shared pointer
- `memory.hpp` allocation functions has been moved to cometa
- `cconj` has been moved to simd module (instead of `math`)
- dr_libs version updated
- All global constants are now `inline constexpr`
- enums moved out of architecture namespace
- `special_constant::undefined` removed

#### Fixed

- Fixed real DFT with raw poitners
- Bug with generators
- Fixed grid issues in dspplot
- Wrong index in `concatenate`
- `csqrt` function
- Fixed NaNs in `amp_to_dB`
- GCC 9 support
- Workaround for Clang 8.0 FMA code generator bug
- Flat top window
- SSE4.2 detection (previously detected as SSE4.1)

#### 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

2019-04-02

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