hayguen/iowahills_dsp

Repo for Code Kit from http://www.iowahills.com/

iowahills_dsp

Repo for Code Kit from http://www.iowahills.com/

Site is reportedly down since September, 2021. Wayback machine has a backup: https://web.archive.org/web/20171110201917/http://iowahills.com/

A platform-independent C/C++ library with many DSP (digital signal processing) functions, amongst also FIR and IIR filter design - but also FFT, DFT, Goertzel and Windowing functions. Find a detailed description at http://www.iowahills.com/A7ExampleCodePage.html

License

Iowa Hills Software, LLC, has put several sources online on their site http://www.iowahills.com/. There is also a Code Kit Download(zip) provided at http://www.iowahills.com/A7ExampleCodePage.html

Theres is (or was) no license information on the website or inside the provided files. After requesting clarification and permission to publish on github, Daniel Klostermann (Iowa Hills Software, LLC) clarified:

No license is required. Do whatever you want with it

He also invited me to publish on github.

Despite his very permissive words, i interpret as Public Domain, i put this repository under MIT License for having legal protection - still allowing everyone free use.

Development

The sources contained global variables; thus, the library wasn't safe for multithreaded use. Hope, these are completely eliminated now.

I've slightly modified the sources, to get them compile and link - mostly without warnings:

• removed some unused variables
• added cases and return (code) for missing/uncatched enum values in a switch/case
• removed/renamed duplicate Sinc() function
• restructured include and src files: modified include directives ..

Despite above changes, i've also added minimal cmake support with support for the install and uninstall targets. Thus, the example(s) directory has an own CMakeLists.txt entry point, which requires the library, to be installed.

Related

• BSL, C++: https://github.com/hayguen/spuce
• MIT, C++: https://github.com/electro-smith/DaisySP
• MIT, C/C++: https://github.com/jgaeddert/liquid-dsp
• MIT, C++: https://github.com/signalsmith-audio/dsp
• BSL, C++: https://github.com/hbe72/cdsp
• LGPL, C++: https://github.com/AlexandreRouma/dsp
• ???, C++: https://github.com/AlexandreRouma/cdsp
• LGPL: https://github.com/lsp-plugins/lsp-dsp-lib
• LGPL: https://github.com/dac1976/dsp
• GPL: https://github.com/kfrlib/kfr
• GPL: https://github.com/mohabouje/eDSP
• Matlab: https://github.com/dario-pilori/dsp-library

iowahills_dsp's Issues

iowahills.com down since Sep 2021

According to web.archive.org recordings, iowahills.com website has been closed in Sep 2021. All content is still available in WayBack Machine https://web.archive.org/web/20171110201917/http://iowahills.com/

Anyone knows about Daniel Klostermann?

Tag a Release

I am writing a port file for VCPKG to make this library easy to install with the VCPKG package manager. However, I do need this repository tagged with a release. I created a fork at https://github.com/DigitalInBlue/iowahills_dsp, and you can see how I tagged a release.

My pull request with Microsoft to add this library to VCPKG is in process. I would greatly appreciate it if you could expedite tagging a release!