Ctlra is a C Library for Controller Support.

Ctlra is a plain C library that supports easily programming with hardware controllers like USB HID devices. Recently controllers have become much more powerful and feature-rich devices, resulting in tight integration between software and hardware controllers. This places a burden on software developers, who must support individual devices.

This library makes it easier to access these powerful hardware control surfaces trough a simple API, which exposes buttons, encoders, sliders, and a grid as components of the controller device. The details of the USB HID protocol, and the implementation of the device communication are abstracted.

This library may be of interest if you are writing music, video or other media software. Or if you just want to hack controller support into your web-browser because you can...