FastFIR | 1D real fast FIR filtering. It's really fast compared

FastFIR is a C library. FastFIR has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

1D real fast FIR filtering. It's really fast compared to slow filtering!!!. ##API usage with Qt. Include qjfastfir.h and compile and link with qjfastfir.cpp. ##API usage with standard C++. Include jfastfir.h and compile and link with jfastfir.cpp. Demo project requires at least Qt5. Open FastFIR/Demo/Demo.pro with Qt creator and run. Demo compares slow FIR and fast FIR times and low pass filter's noise at 800Hz and outputs this to the default soundcard device. The class QJFilterDesign/JFilterDesign contains the following filter designs as static member functions. The static members for the Qt version are as follows where frequencies are in Hz and Samplerate is in samples per second. These designs return the kernel for use with the FastFir. For example, to create a BPF that has a FIR length of 1001 that covers 1000Hz to 2000Hz and a Samplerate of 48000bps then following code can be used. The QJFastFIRFilter class contains the public member function "Update" that does the processing of the raw input signal/data. Its prototype is as follows. It is designed so that it reads "data", filteres it, then replaces "data" with the filtered responce. It performs internal buffering so that no matter how much data is given to "Update", "Update" will replace every item in "data". Basicly this makes it eaiser to design applications.