This is the Destroy FX Library, a collection of useful source code material for writing audio processing plugins. Our base library code is composed of the dfxplugin and dfxparameter files, plus dfxmidi, dfxenvelope, and dfxsettings for plugins that use MIDI. And there is oodles of other stuff too.

dfxplugin has the base class from which we derive when making plugins. The main functions that it serves are (1) making it really easy to make a new plugin from scratch and (2) making it really easy to support multiple plugin APIs (Audio Unit and VST at the moment).

dfxparameter has the parameter class with all kinds of fanciness that we use in dfxplugins.

dfxmidi has MIDI handling and related routines.

dfxsettings has routines for storing special plugin settings in custom data blocks and also for adding MIDI learn functionality for fully MIDI control of all plugin parameters.

dfx-au-utilities has some stuff that's useful for pretty much any AU plugin or host, so it's in separate files because we possibly also use that stuff in non-DFX projects. Also, for that same reason, these files are an exception in that they are offered under the terms of a modified BSD License (see bsd-license.txt) rather than the GNU General Public License (GPL).

dfx-base.h a bunch of core definitions for Destroy FX plugins, and some base stuff that's just useful in all of our the source tree.

dfxmath.h has various handy math-related constants and functions.

dfxmutex has an implementation for mutexes that we use in Geometer.