1 files changed, 86 insertions, 0 deletions
diff --git a/libs/ardour/ardour/curve.h b/libs/ardour/ardour/curve.h
new file mode 100644
index 0000000000..1c6a4c5bc4
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+++ b/libs/ardour/ardour/curve.h
@@ -0,0 +1,86 @@
+/*
+    Copyright (C) 2001-2003 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id$
+*/
+
+#ifndef __ardour_curve_h__
+#define __ardour_curve_h__
+
+#include <sys/types.h>
+#include <sigc++/signal.h>
+#include <pbd/lockmonitor.h>
+#include <pbd/undo.h>
+#include <list>
+#include <algorithm>
+#include <pthread.h>
+#include <ardour/automation_event.h>
+
+namespace ARDOUR {
+
+struct CurvePoint : public ControlEvent 
+{
+    double coeff[4];
+
+    CurvePoint (double w, double v) 
+	    : ControlEvent (w, v) {
+
+	    coeff[0] = coeff[1] = coeff[2] = coeff[3] = 0.0;
+    }
+
+    ~CurvePoint() {}
+};
+
+class Curve : public AutomationList
+{
+  public:
+	Curve (double min_yval, double max_yval, double defaultvalue, bool nostate = false);
+	~Curve ();
+	Curve (const Curve& other);
+	Curve (const Curve& other, double start, double end);
+
+	bool rt_safe_get_vector (double x0, double x1, float *arg, int32_t veclen);
+	void get_vector (double x0, double x1, float *arg, int32_t veclen);
+
+	AutomationEventList::iterator closest_control_point_before (double xval);
+	AutomationEventList::iterator closest_control_point_after (double xval);
+
+	void solve ();
+		
+  protected:
+	ControlEvent* point_factory (double,double) const;
+	ControlEvent* point_factory (const ControlEvent&) const;
+
+	Change   restore_state (StateManager::State&);
+
+  private:
+	AutomationList::iterator last_bound;
+
+	double unlocked_eval (double where);
+	double multipoint_eval (double x);
+
+	void _get_vector (double x0, double x1, float *arg, int32_t veclen);
+
+};
+
+}; /* namespace ARDOUR */
+
+extern "C" {
+	void curve_get_vector_from_c (void *arg, double, double, float*, int32_t);
+}
+
+#endif /* __ardour_curve_h__ */