Reinstate user Controllable values, as they are needed

for gain (which I forgot about).


git-svn-id: svn://localhost/ardour2/branches/3.0@11293 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/amp.cc

@@ -423,23 +423,23 @@ Amp::GainControl::set_value (double val)
 }
 
 double
-Amp::GainControl::get_value (void) const
-{
-	return AutomationControl::get_value();
-}
-
-double
-Amp::GainControl::user_to_ui (double v) const
+Amp::GainControl::internal_to_interface (double v) const
 {
 	return gain_to_slider_position (v);
 }
 
 double
-Amp::GainControl::ui_to_user (double v) const
+Amp::GainControl::interface_to_internal (double v) const
 {
 	return slider_position_to_gain (v);
 }
 
+double
+Amp::GainControl::internal_to_user (double v) const
+{
+	return accurate_coefficient_to_dB (v);
+}
+
 void
 Amp::setup_gain_automation (framepos_t start_frame, framepos_t end_frame, framecnt_t nframes)
 {

libs/ardour/ardour/amp.h

@@ -82,10 +82,10 @@ public:
 		}
 
 		void set_value (double val);
-		double get_value (void) const;
 
-		double user_to_ui (double) const;
-		double ui_to_user (double) const;
+		double internal_to_interface (double) const;
+		double interface_to_internal (double) const;
+		double internal_to_user (double) const;
 
 		Amp* _amp;
 	};

libs/ardour/ardour/automation_control.h

@@ -77,6 +77,18 @@ public:
 	void set_value (double);
 	double get_value () const;
 
+	virtual double internal_to_interface (double v) const {
+		return v;
+	}
+	
+	virtual double interface_to_internal (double v) const {
+		return v;
+	}
+
+	virtual double internal_to_user (double v) const {
+		return v;
+	}
+
 	double lower() const { return parameter().min(); }
 	double upper() const { return parameter().max(); }
 	double normal() const { return parameter().normal(); }

libs/ardour/ardour/plugin_insert.h

@@ -89,8 +89,8 @@ class PluginInsert : public Processor
 		double get_value (void) const;
 		XMLNode& get_state();
 
-		double user_to_ui (double) const;
-		double ui_to_user (double) const;
+		double internal_to_interface (double) const;
+		double interface_to_internal (double) const;
 
 	private:
 		PluginInsert* _plugin;

libs/ardour/plugin_insert.cc

@@ -1174,7 +1174,7 @@ PluginInsert::PluginControl::set_value (double user_val)
 }
 
 double
-PluginInsert::PluginControl::user_to_ui (double val) const
+PluginInsert::PluginControl::internal_to_interface (double val) const
 {
 	if (_logarithmic) {
 		if (val > 0) {
@@ -1188,7 +1188,7 @@ PluginInsert::PluginControl::user_to_ui (double val) const
 }
 
 double
-PluginInsert::PluginControl::ui_to_user (double val) const
+PluginInsert::PluginControl::interface_to_internal (double val) const
 {
 	if (_logarithmic) {
 		val = exp (val);

libs/pbd/pbd/controllable.h

@@ -43,27 +43,27 @@ class Controllable : public PBD::StatefulDestructible {
 	Controllable (const std::string& name, Flag f = Flag (0));
 	virtual ~Controllable() { Destroyed (this); }
 
-	/* We express Controllable values in one of two ways:
-	 * 1. `UI' --- as used in some cases for the internal representation
-	 *    of the UI.  This may be the same as `user', or may be something
-	 *    like the natural log of frequency in order that sliders operate
-	 *    in a logarithmic fashion.
-	 * 2. `user' --- as passed to a plugin, and presented to the user.
+	/* We express Controllable values in one of three ways:
+	 * 1. `user' --- as presented to the user (e.g. dB, Hz, etc.)
+	 * 2. `interface' --- as used in some cases for the UI representation
+	 * (in order to make controls behave logarithmically).
+	 * 3. `internal' --- as passed to a processor, track, plugin, or whatever.
+	 *
+	 * Note that in some cases user and processor may be the same
+	 * (and interface different) e.g. frequency, which is presented
+	 * to the user and passed to the processor in linear terms, but
+	 * which needs log scaling in the interface.
+	 *
+	 * In other cases, user and interface may be the same (and processor different)
+	 * e.g. gain, which is presented to the user in log terms (dB)
+	 * but passed to the processor as a linear quantity.
 	 */
 
-	/** Set `user' value */
+	/** Set `internal' value */
 	virtual void set_value (double) = 0;
-	/** @return `user' value */
+	/** @return `internal' value */
 	virtual double get_value (void) const = 0;
 
-	virtual double user_to_ui (double v) const {
-		return v;
-	}
-
-	virtual double ui_to_user (double v) const {
-		return v;
-	}
-
 	PBD::Signal0<void> LearningFinished;
 	static PBD::Signal3<void,PBD::Controllable*,int,int> CreateBinding;
 	static PBD::Signal1<void,PBD::Controllable*> DeleteBinding;