add 'audio.input-device' setting

src/engine/Engine.cpp

@@ -175,6 +175,10 @@ void Engine::initialize(CoreParameters coreParameters) {
         langs::setup(lang, paths->resPaths.collectRoots());
     }, true));
 
+    keepAlive(settings.audio.inputDevice.observe([](auto name) {
+        audio::set_input_device(name == "auto" ? "" : name);
+    }, true));
+
     project->loadProjectStartScript();
     if (!params.headless) {
         project->loadProjectClientScript();

src/io/settings_io.cpp

@@ -43,6 +43,7 @@ SettingsHandler::SettingsHandler(EngineSettings& settings) {
     builder.add("volume-ui", &settings.audio.volumeUI);
     builder.add("volume-ambient", &settings.audio.volumeAmbient);
     builder.add("volume-music", &settings.audio.volumeMusic);
+    builder.add("input-device", &settings.audio.inputDevice);
 
     builder.section("display");
     builder.add("width", &settings.display.width);

src/settings.hpp

@@ -16,6 +16,8 @@ struct AudioSettings {
     NumberSetting volumeUI {1.0f, 0.0f, 1.0f, setting_format::percent};
     NumberSetting volumeAmbient {1.0f, 0.0f, 1.0f, setting_format::percent};
     NumberSetting volumeMusic {1.0f, 0.0f, 1.0f, setting_format::percent};
+
+    StringSetting inputDevice {"auto"};
 };
 
 struct DisplaySettings {