diff --git a/README.md b/README.md index ddb1907..237bd6d 100644 --- a/README.md +++ b/README.md @@ -3,6 +3,78 @@ A [Nim] library for writing audio and MIDI plugins conforming to the [LV2] standard +## Examples + +Build the `amp.lv2` example plugin: + + nimble build_ex amp + +Check the `amp.lv2` plugin bundle with `lv2lint`: + + nimble lv2lint amp + +Run the `lv2bm` benchmark with the `amp.lv2` plugin: + + nimble lv2bm amp + +Install the `amp.lv2` example plugin: + + cp -a examples/amp.lv2 ~/.lv2 + + +## How To + +* Install this library: + + nimble install https://git.0x20.eu/chris/nymph + +* Copy `examples/amp.lv2` and `examples/amp.nim` into your project and rename + them as you like (also rename `amp.lv2/amp.ttl`). I'll use `myplugin` as the + base name in the examples below. + +* Edit `myplugin.lv2/manifest.ttl` and change the plugin URI and change the + plugin's shared library name defined with `lv2:binary` to `libmyplugin.so`. + +* Edit `myplugin.lv2/myplugin.ttl`: + * Change the plugin URI. + * Define audio, control and atom ports as needed. + +* Edit `myplugin.nim`: + * Change the `PluginUri` constant at the top. + * Change the `PluginPort` enum and list the ports in the order defined in + `myplugin.ttl`. + * Rename and update the definition of the `AmpPlugin` object type and + define its members with the appropriate data type for the plugin port + they will be connected to. Update the type name in the `instantiate`, + `deactivate`, `connectPorts` and `run` procs. + * Update and extend the `case` statement in `connectPort` to connect ports + to your plugin object instance members. + * Implement your DSP code in the `run` proc. + +* Compile the plugin shared library object with: + + nim c --app:lib --noMain:on --mm:arc \ + --out:myplugin.lv2/libmyplugin.so myplugin.nim + + See the definition of the `build_ex` task in the + [nymph.nimble](./nymph.nimble#L43) file on how to create a nimble task + to simplify compilation. + + +## Dependencies + +Required: + +* [Nim] >= 2.0 + +Optional: + +* [lv2bm] - For benchmarking and stress-testing plugins +* [lv2lint] - For checking conformity of plugin bundles + + [LV2]: https://lv2plug.in/ +[lv2bm]: https://github.com/moddevices/lv2bm +[lv2lint]: https://git.open-music-kontrollers.ch/~hp/lv2lint [Nim]: https://nim-lang.org/