Replace thinning static state with parameter.

libs/ardour/automatable.cc

@@ -365,14 +365,18 @@ void
 Automatable::transport_stopped (framepos_t now)
 {
 	for (Controls::iterator li = controls().begin(); li != controls().end(); ++li) {
+		boost::shared_ptr<AutomationControl> c =
+			boost::dynamic_pointer_cast<AutomationControl>(li->second);
+		if (!c) {
+			continue;
+		}
 
-		boost::shared_ptr<AutomationControl> c
+		boost::shared_ptr<AutomationList> l =
-				= boost::dynamic_pointer_cast<AutomationControl>(li->second);
+			boost::dynamic_pointer_cast<AutomationList>(c->list());
-                if (c) {
+		if (!l) {
-                        boost::shared_ptr<AutomationList> l
+			continue;
-				= boost::dynamic_pointer_cast<AutomationList>(c->list());
+		}
 
-                        if (l) {
 		/* Stop any active touch gesture just before we mark the write pass
 		   as finished.  If we don't do this, the transport can end up stopped with
 		   an AutomationList thinking that a touch is still in progress and,
@@ -380,7 +384,7 @@ Automatable::transport_stopped (framepos_t now)
 		   be happening without it ever have being started in the usual way.
 		*/
 		l->stop_touch (true, now);
-                                l->write_pass_finished (now);
+		l->write_pass_finished (now, Config->get_automation_thinning_factor());
 
 		if (l->automation_playback()) {
 			c->set_value(c->list()->eval(now));
@@ -391,8 +395,6 @@ Automatable::transport_stopped (framepos_t now)
 		}
 	}
 }
-	}
-}
 
 boost::shared_ptr<Evoral::Control>
 Automatable::control_factory(const Evoral::Parameter& param)

libs/ardour/session_state.cc

@@ -3503,8 +3503,6 @@ Session::config_changed (std::string p, bool ours)
 		last_timecode_valid = false;
 	} else if (p == "playback-buffer-seconds") {
 		AudioSource::allocate_working_buffers (frame_rate());
-	} else if (p == "automation-thinning-factor") {
-		Evoral::ControlList::set_thinning_factor (Config->get_automation_thinning_factor());
 	} else if (p == "ltc-source-port") {
 		reconnect_ltc_input ();
 	} else if (p == "ltc-sink-port") {

libs/evoral/evoral/ControlList.hpp

@@ -131,7 +131,20 @@ public:
 	bool move_ranges (std::list< RangeMove<double> > const &);
 	void modify (iterator, double, double);
 
-        void thin ();
+	/** Thin the number of events in this list.
+	 *
+	 * The thinning factor has no units but corresponds to the area of a
+	 * triangle computed between three points in the list.  If the area is
+	 * large, it indicates significant non-linearity between the points.
+	 *
+	 * During automation recording we thin the recorded points using this
+	 * value.  If a point is sufficiently co-linear with its neighbours (as
+	 * defined by the area of the triangle formed by three of them), we will
+	 * not include it in the list.  The larger the value, the more points are
+	 * excluded, so this effectively measures the amount of thinning to be
+	 * done.
+	 */
+	void thin (double thinning_factor);
 
 	boost::shared_ptr<ControlList> cut (double, double);
 	boost::shared_ptr<ControlList> copy (double, double);
@@ -245,7 +258,7 @@ public:
 	virtual bool writing() const { return false; }
 	virtual bool touch_enabled() const { return false; }
         void start_write_pass (double time);
-	void write_pass_finished (double when);
+        void write_pass_finished (double when, double thinning_factor=0.0);
         void set_in_write_pass (bool, bool add_point = false, double when = 0.0);
         bool in_write_pass () const;
 
@@ -254,9 +267,6 @@ public:
 	/** Emitted when our interpolation style changes */
 	PBD::Signal1<void, InterpolationStyle> InterpolationChanged;
 
-        static void set_thinning_factor (double d);
-        static double thinning_factor() { return _thinning_factor; }
-
 	bool operator!= (ControlList const &) const;
 
         void invalidate_insert_iterator ();
@@ -291,8 +301,6 @@ protected:
 
 	Curve* _curve;
 
-        static double _thinning_factor;
-
   private:
     iterator   most_recent_insert_iterator;
     double     insert_position;

libs/evoral/src/ControlList.cpp

@@ -36,22 +36,6 @@ inline bool event_time_less_than (ControlEvent* a, ControlEvent* b)
 	return a->when < b->when;
 }
 
-/* this has no units but corresponds to the area of a rectangle
-   computed between three points in the list. If the area is
-   large, it indicates significant non-linearity between the
-   points. 
-
-   during automation recording we thin the recorded points
-   using this value. if a point is sufficiently co-linear 
-   with its neighbours (as defined by the area of the rectangle
-   formed by three of them), we will not include it in the
-   ControlList. a smaller value will exclude less points,
-   a larger value will exclude more points, so it effectively
-   measures the amount of thinning to be done.
-*/
-
-double ControlList::_thinning_factor = 20.0; 
-
 ControlList::ControlList (const Parameter& id)
 	: _parameter(id)
 	, _interpolation(id.toggled() ? Discrete : Linear)
@@ -258,8 +242,12 @@ struct ControlEventTimeComparator {
 };
 
 void
-ControlList::thin ()
+ControlList::thin (double thinning_factor)
 {
+	if (thinning_factor == 0.0) {
+		return;
+	}
+
 	bool changed = false;
 
 	{
@@ -287,7 +275,7 @@ ControlList::thin ()
 						    (prev->when * (cur->value - prevprev->value)) + 
 						    (cur->when * (prevprev->value - prev->value)));
 				
-				if (area < _thinning_factor) {
+				if (area < thinning_factor) {
 					iterator tmp = pprev;
 					
 					/* pprev will change to current
@@ -364,12 +352,12 @@ ControlList::start_write_pass (double when)
 }
 
 void
-ControlList::write_pass_finished (double /*when*/)
+ControlList::write_pass_finished (double /*when*/, double thinning_factor)
 {
 	DEBUG_TRACE (DEBUG::ControlList, "write pass finished\n");
 
 	if (did_write_during_pass) {
-		thin ();
+		thin (thinning_factor);
 		did_write_during_pass = false;
 	}
 	new_write_pass = true;
@@ -1738,12 +1726,6 @@ ControlList::set_interpolation (InterpolationStyle s)
 	InterpolationChanged (s); /* EMIT SIGNAL */
 }
 
-void
-ControlList::set_thinning_factor (double v)
-{
-	_thinning_factor = v;
-}
-
 bool
 ControlList::operator!= (ControlList const & other) const
 {