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Add Lua API to query plugin properties

This commit is contained in:
Robin Gareus 2024-03-24 23:05:07 +01:00
parent cfa45be99f
commit 980eb595cf
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
4 changed files with 66 additions and 0 deletions
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8
libs/ardour/ardour/lua_api.h
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@ -167,6 +167,14 @@ namespace ARDOUR { namespace LuaAPI {
*/
bool set_plugin_insert_property (std::shared_ptr<ARDOUR::PluginInsert> pi, std::string const& uri, luabridge::LuaRef value);
/** get a plugin property (LV2 plugins only)
*
* @param p two arguments: Plugin-Inster, URI of the property
* @param value the value to set (boolean, integer, float, string/path)
* @returns value, depending on datatype or nil if property is not found
*/
int get_plugin_insert_property (lua_State *lua);
/**
* A convenience function to get a Automation Lists and ParameterDescriptor
* for a given plugin control.

5
libs/ardour/ardour/plugin.h
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@ -358,6 +358,11 @@ public:
*/
virtual void set_property (uint32_t key, const Variant& value) {}
virtual Variant get_property_value (uint32_t) const
{
return Variant();
}
/** Emit PropertyChanged for all current property values. */
virtual void announce_property_values () {}

52
libs/ardour/lua_api.cc
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@ -320,6 +320,58 @@ ARDOUR::LuaAPI::set_plugin_insert_property (std::shared_ptr<PluginInsert> pi, st
return false;
}
int
ARDOUR::LuaAPI::get_plugin_insert_property (lua_State* L)
{
typedef std::shared_ptr<PluginInsert> T;
int top = lua_gettop (L);
if (top < 2) {
return luaL_argerror (L, 1, "invalid number of arguments, :get_plugin_insert_property (plugin, uri)");
}
T* const pi = luabridge::Userdata::get<T> (L, 1, false);
std::string uri = luabridge::Stack<std::string>::get (L, 2);
if (!pi) {
return luaL_error (L, "Invalid pointer to Ardour:PluginInsert");
}
std::shared_ptr<Plugin> plugin = (*pi)->plugin ();
if (!plugin) { return 0; }
uint32_t key = URIMap::instance ().uri_to_id (uri.c_str ());
plugin->announce_property_values ();
wait_for_process_callback (1, 0);
Variant v = plugin->get_property_value (key);
switch (v.type ()) {
case Variant::PATH:
luabridge::Stack<std::string>::push (L, v.get_path ());
return 1;
case Variant::STRING:
luabridge::Stack<std::string>::push (L, v.get_string ());
return 1;
case Variant::URI:
luabridge::Stack<std::string>::push (L, v.get_uri ());
return 1;
case Variant::BOOL:
luabridge::Stack<bool>::push (L, v.get_bool ());
return 1;
case Variant::DOUBLE:
luabridge::Stack<double>::push (L, v.get_double ());
return 1;
case Variant::FLOAT:
luabridge::Stack<float>::push (L, v.get_float ());
return 1;
case Variant::INT:
luabridge::Stack<int>::push (L, v.get_int ());
return 1;
case Variant::LONG:
luabridge::Stack<long>::push (L, v.get_long ());
return 1;
default:
break;
}
return 0;
}
bool
ARDOUR::LuaAPI::set_processor_param (std::shared_ptr<Processor> proc, uint32_t which, float val)
{

1
libs/ardour/luabindings.cc
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@ -3133,6 +3133,7 @@ LuaBindings::common (lua_State* L)
.addFunction ("set_processor_param", ARDOUR::LuaAPI::set_processor_param)
.addFunction ("set_plugin_insert_param", ARDOUR::LuaAPI::set_plugin_insert_param)
.addFunction ("set_plugin_insert_property", ARDOUR::LuaAPI::set_plugin_insert_property)
.addCFunction ("get_plugin_insert_property", ARDOUR::LuaAPI::get_plugin_insert_property)
.addFunction ("reset_processor_to_default", ARDOUR::LuaAPI::reset_processor_to_default)
.addFunction ("set_automation_data", ARDOUR::LuaAPI::set_automation_data)
.addRefFunction ("get_processor_param", ARDOUR::LuaAPI::get_processor_param)