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wiki:ardourlua [26.01.2016 17:29] rgareus created |
wiki:ardourlua [24.02.2016 00:46] (current) rgareus [LuaSession] |
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====== Ardour Lua Scripting ====== | ====== Ardour Lua Scripting ====== | ||
- | ~~DRAFT~~ | + | moved to http://manual.ardour.org/lua-scripting/ |
- | Lua is a lightweight programming language which lends itself nicely to embedded into other applications. | + | ===== Console Examples ===== |
- | In Ardour's case Lua is available... | ||
- | |||
- | * DSP Scripts - audio processor plugins (per track) with access to the session | ||
- | * Session Scripts - global per session actions | ||
- | * Editor Action Scripts - user accessible actions (menu, bindings) | ||
- | * Editor Hooks - event triggered GUI actions | ||
- | * Script Console | ||
- | |||
- | ===== Why Lua? ===== | ||
- | |||
- | small, lean, rt-safe. | ||
- | |||
- | ==== General Concepts ==== | ||
- | |||
- | * Ardour calls Lua (not the other way 'round). | ||
- | * No bound constructors. ardour provided factory methods. ie. Lua asks ardour to create objects (eg, new tracks) then get a reference to the object. | ||
- | |||
- | ===== DSP Scripts ===== | ||
- | |||
- | |||
- | |||
- | ===== Editor Examples ===== | ||
- | |||
- | |||
print (Session:route_by_remote_id(1):name()) | print (Session:route_by_remote_id(1):name()) | ||
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# called when a new session is loaded: | # called when a new session is loaded: | ||
function new_session (name) print("NEW SESSION:", name) end | function new_session (name) print("NEW SESSION:", name) end | ||
+ | |||
+ | |||
+ | route = Session:route_by_remote_id(1) | ||
+ | processor = route:nth_plugin(0) | ||
+ | plugininsert = processor:to_insert() | ||
+ | |||
+ | plugin = plugininsert:plugin(0) | ||
+ | print (plugin:label()) | ||
+ | print (plugin:parameter_count()) | ||
+ | |||
+ | x = ARDOUR.ParameterDescriptor () | ||
+ | _, t = plugin:get_parameter_descriptor(2, x) -- port #2 | ||
+ | paramdesc = t[2] | ||
+ | print (paramdesc.lower) | ||
+ | |||
+ | ctrl = ARDOUR.EvoralParameter(ARDOUR.AutomationType.PluginAutomation, 0, 2) | ||
+ | ac = plugininsert:automation_control(ctrl, false) | ||
+ | print (ac:get_value ()) | ||
+ | ac:set_value(1.0, PBD.GroupControlDisposition.NoGroup) | ||
+ | |||
+ | ===== LuaSession ===== | ||
+ | |||
+ | for i,_ in AudioEngine:available_backends():iter() do print (i.name) end | ||
+ | backend = AudioEngine:set_backend("ALSA", "", "") | ||
+ | print (AudioEngine:current_backend_name()) | ||
+ | for i,_ in backend:enumerate_devices():iter() do print (i.name) end | ||
+ | backend:set_input_device_name("HDA Intel PCH") | ||
+ | backend:set_output_device_name("HDA Intel PCH") | ||
+ | print (backend:buffer_size()) | ||
+ | print (AudioEngine:get_last_backend_error()) | ||
+ | |||
+ | s = load_session ("/home/rgareus/Documents/ArdourSessions/lua2/", "lua2") | ||
+ | s:request_transport_speed (1.0) | ||
+ | print (s:transport_rolling()) | ||
+ | s:goto_start() | ||
+ | close_session() | ||