1 files changed, 81 insertions, 0 deletions
diff --git a/libs/ardour/ardour/value_as_string.h b/libs/ardour/ardour/value_as_string.h
new file mode 100644
index 0000000000..6c17ace5d3
--- /dev/null
+++ b/libs/ardour/ardour/value_as_string.h
@@ -0,0 +1,81 @@
+/*
+    Copyright (C) 2014 Paul Davis
+    Author: David Robillard
+
+    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.
+
+*/
+
+#ifndef __ardour_value_as_string_h__
+#define __ardour_value_as_string_h__
+
+#include <stddef.h>
+
+#include "ardour/parameter_descriptor.h"
+
+namespace ARDOUR {
+
+inline std::string
+value_as_string(const ARDOUR::ParameterDescriptor& desc,
+                double                             v)
+{
+	char buf[32];
+
+	if (desc.scale_points) {
+		// Check if value is on a scale point
+		for (ARDOUR::ScalePoints::const_iterator i = desc.scale_points->begin();
+		     i != desc.scale_points->end();
+		     ++i) {
+			if (i->second == v) {
+				return i->first;  // Found it, return scale point label
+			}
+		}
+	}
+
+	// Value is not a scale point, print it normally
+	if (desc.unit == ARDOUR::ParameterDescriptor::MIDI_NOTE) {
+		if (v >= 0 && v <= 127) {
+			const int         num          = rint(v);
+			static const char names[12][3] = {
+				"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"
+			};
+			snprintf(buf, sizeof(buf), "%s %d", names[num % 12], (num / 12) - 2);
+		} else {
+			// Odd, invalid range, just print the number
+			snprintf(buf, sizeof(buf), "%.0f", v);
+		}
+	} else if (desc.integer_step) {
+		snprintf(buf, sizeof(buf), "%d", (int)v);
+	} else {
+		snprintf(buf, sizeof(buf), "%.2f", v);
+	}
+	if (desc.unit == ARDOUR::ParameterDescriptor::DB) {
+		// TODO: Move proper dB printing from AutomationLine here
+		return std::string(buf) + " dB";
+	}
+	return buf;
+}
+
+inline std::string
+value_as_string(const ARDOUR::ParameterDescriptor& desc,
+                const ARDOUR::Variant&             val)
+{
+	// Only numeric support, for now
+	return value_as_string(desc, val.to_double());
+}
+
+}  // namespace ARDOUR
+
+#endif /* __ardour_value_as_string_h__ */