This repository is for Fluidsynth plugin example for Audio Plugins For Android. It is powered by LV2 using aap-lv2.
The plugin application itself is not really featureful yet. The SoundFont file is fixed as FluidR3_GM.sf3 in the C++ code. It can be made customizible, but it does not happen yet.
make should take care of the builds. See GitHub Actions script for further normative setup.
Building fluidsynth takes a while, but once native libraries are built and then automatically copied into app/src/main/jniLibs, then you don't have to build them again. Android Studio run/debug is usable (or ./gradlew *).
In this repo, we build fluidsynth for Android without Oboe and OpenSLES, unlike the official build does (the official build script is written by atsushieno as well). It is simply because we only need synthesizer part without native audio access.
While Fluidsynth build is CMake based, it could not simply specified in build.gradle (it fails to compile). Therefore we use somewhat modified version of the build script from my fork (can be upstreamed but the related tasks are not done yet).
LV2 plugin implementation is quite simple (maybe too simple). There is no parameters exposed, and states to persistize. There are many rooms to improve.
aap-lv2-fluidsynth codebase is distributed under the MIT license.
LV2 (repository for the headers) is under the ISC license.
fluidsynth is distributed under the LGPL v2.1 license.
app/src/main/assets/FluidR3Mono_GM.sf3 is a binary copy of the same file from fluidr3mono-gm-soundfont debian package and it is licensed under the MIT license.
The entire plugin application bundles androidaudioplugin-lv2 AAR module from aap-lv2, and androidaudioplugin AAR module, and is packaged into one application.