1 files changed, 137 insertions, 0 deletions
diff --git a/libs/surfaces/us2400/meter.cc b/libs/surfaces/us2400/meter.cc
new file mode 100644
index 0000000000..dd08724ff5
--- /dev/null
+++ b/libs/surfaces/us2400/meter.cc
@@ -0,0 +1,137 @@
+/*
+	Copyright (C) 2006,2007 John Anderson
+	Copyright (C) 2012 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.
+*/
+
+#include <cmath>
+
+#include "pbd/compose.h"
+#include "ardour/debug.h"
+
+#include "meter.h"
+#include "surface.h"
+#include "surface_port.h"
+#include "control_group.h"
+#include "us2400_control_protocol.h"
+
+using namespace PBD;
+using namespace ArdourSurface;
+using namespace US2400;
+
+Control*
+Meter::factory (Surface& surface, int id, const char* name, Group& group)
+{
+	Meter* m = new Meter (id, name, group);
+	surface.meters[id] = m;
+	surface.controls.push_back (m);
+	group.add (*m);
+	return m;
+}
+
+void
+Meter::notify_metering_state_changed(Surface& surface, bool transport_is_rolling, bool metering_active)
+{
+return;
+
+	MidiByteArray msg;
+
+	// sysex header
+	msg << surface.sysex_hdr();
+
+	// code for Channel Meter Enable Message
+	msg << 0x20;
+
+	// Channel identification
+	msg << id();
+
+	// Enable (0x07) / Disable (0x00) level meter on LCD, peak hold display on horizontal meter and signal LED
+	_enabled = ((surface.mcp().device_info().has_separate_meters() || transport_is_rolling) && metering_active);
+	msg << (_enabled ? 0x07 : 0x00);
+
+	// sysex trailer
+	msg << MIDI::eox;
+
+	surface.write (msg);
+}
+
+void
+Meter::send_update (Surface& surface, float dB)
+{
+
+	float def = 0.0f; /* Meter deflection %age */
+
+	// DEBUG_TRACE (DEBUG::US2400, string_compose ("Meter ID %1 dB %2\n", id(), dB));
+
+	if (dB < -70.0f) {
+		def = 0.0f;
+	} else if (dB < -60.0f) {
+		def = (dB + 70.0f) * 0.25f;
+	} else if (dB < -50.0f) {
+		def = (dB + 60.0f) * 0.5f + 2.5f;
+	} else if (dB < -40.0f) {
+		def = (dB + 50.0f) * 0.75f + 7.5f;
+	} else if (dB < -30.0f) {
+		def = (dB + 40.0f) * 1.5f + 15.0f;
+	} else if (dB < -20.0f) {
+		def = (dB + 30.0f) * 2.0f + 30.0f;
+	} else if (dB < 6.0f) {
+		def = (dB + 20.0f) * 2.5f + 50.0f;
+	} else {
+		def = 115.0f;
+	}
+
+	/* 115 is the deflection %age that would be
+	   when dB=6.0. this is an arbitrary
+	   endpoint for our scaling.
+	*/
+
+	MidiByteArray msg;
+
+	if (def > 100.0f) {
+		if (!overload_on) {
+			overload_on = true;
+			surface.write (MidiByteArray (2, 0xd0, (id() << 4) | 0xe));
+		}
+	} else {
+		if (overload_on) {
+			overload_on = false;
+			surface.write (MidiByteArray (2, 0xd0, (id() << 4) | 0xf));
+		}
+	}
+
+	/* we can use up to 13 segments */
+
+	int segment = lrintf ((def/115.0) * 13.0);
+
+	//only send an update 'twice'
+	if (segment == last_update_segment) {
+		if (segment == llast_update_segment) {
+			return;
+		}
+	}
+	llast_update_segment = last_update_segment;
+	last_update_segment = segment;
+
+
+	surface.write (MidiByteArray (2, 0xd0, (id()<<4) | segment));
+}
+
+MidiByteArray
+Meter::zero ()
+{
+	return MidiByteArray (2, 0xD0, (id()<<4 | 0));
+}