A rust implementation of convolution in the frequency domain (suitable for real-time use) inspired by the HiFi-LoFi FFT Convolver which is MIT licensed.
As of the time of this writing there does not seem to be a rust implementation of FFT convolution algorithms that is suitable for real-time use. One can find an older rust port of just the FFTConvolver class, but it does not support real-time switching of impulse responses and does not include implementations for the TwoStageFFTConvolver and CrossfadeConvolver classes.
As the original C++ implementation, this library implements:
- Partitioned convolution algorithm (using uniform block sizes)
- Optional support for non-uniform block sizes (
TwoStageFFTConvolver)
On top of that it implements:
- Real-time safe switching of impulse responses in the
FFTConvolver - Real-time and artefact-free switching of impulse responses using the
CrossfadeConvolver
Compared to the original C++ implementation, this implementation does not provide:
- Its own FFT implementation (it currently uses the rustfft crate)
- The option to use SSE instructions in the
FFTConvolver
- rust >=1.72.0