Add enum to configure VST3 knob mode

libs/ardour/ardour/types.h

@@ -1003,6 +1003,14 @@ enum RecordState {
 };
 
 
+/* compare to IEditController */
+enum VST3KnobMode {
+	VST3KnobPluginDefault = -1,
+	VST3KnobCircularMode = 0,
+	VST3KnobRelativCircularMode,
+	VST3KnobLinearMode
+};
+
 } // namespace ARDOUR
 
 /* for now, break the rules and use "using" to make this "global" */

libs/ardour/ardour/types_convert.h

@@ -91,6 +91,7 @@ DEFINE_ENUM_CONVERT(ARDOUR::MidiPortFlags)
 DEFINE_ENUM_CONVERT(ARDOUR::TransportRequestType)
 DEFINE_ENUM_CONVERT(ARDOUR::LoopFadeChoice)
 DEFINE_ENUM_CONVERT(ARDOUR::CueBehavior)
+DEFINE_ENUM_CONVERT(ARDOUR::VST3KnobMode)
 
 DEFINE_ENUM_CONVERT(MusicalMode::Type)
 

libs/ardour/enums.cc

@@ -168,6 +168,7 @@ setup_enum_writer ()
 	FollowAction::Type _FollowAction;
 	Trigger::StretchMode _TriggerStretchMode;
 	CueBehavior _CueBehavior;
+	VST3KnobMode _VST3KnobMode;
 	DSP::PerceptualAnalyzer::Speed _DSPAnalyzerSpeed;
 	DSP::PerceptualAnalyzer::Warp _DSPAnalyzerWarp;
 
@@ -958,6 +959,12 @@ setup_enum_writer ()
 	REGISTER_ENUM (ImplicitlyIgnoreCues);
 	REGISTER_BITS (_CueBehavior);
 
+	REGISTER_ENUM (VST3KnobPluginDefault);
+	REGISTER_ENUM (VST3KnobCircularMode);
+	REGISTER_ENUM (VST3KnobRelativCircularMode);
+	REGISTER_ENUM (VST3KnobLinearMode);
+	REGISTER (_VST3KnobMode);
+
 	REGISTER_CLASS_ENUM (DSP::PerceptualAnalyzer, Rapid);
 	REGISTER_CLASS_ENUM (DSP::PerceptualAnalyzer, Fast);
 	REGISTER_CLASS_ENUM (DSP::PerceptualAnalyzer, Moderate);