From 99904735e066804358f1d0bd138a84f1e9ecda91 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 18 Mar 2007 06:07:08 +0000
Subject: Merged with trunk R1612.

git-svn-id: svn://localhost/ardour2/branches/midi@1614 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/surfaces/tranzport/wheel.cc | 206 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 206 insertions(+)
 create mode 100644 libs/surfaces/tranzport/wheel.cc

(limited to 'libs/surfaces/tranzport/wheel.cc')

diff --git a/libs/surfaces/tranzport/wheel.cc b/libs/surfaces/tranzport/wheel.cc
new file mode 100644
index 0000000000..bc9683e6d7
--- /dev/null
+++ b/libs/surfaces/tranzport/wheel.cc
@@ -0,0 +1,206 @@
+/*
+ *   Copyright (C) 2006 Paul Davis 
+ *   Copyright (C) 2007 Michael Taht
+ *
+ *   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 <iostream>
+#include <algorithm>
+#include <cmath>
+
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
+#include <float.h>
+#include <sys/time.h>
+#include <errno.h>
+#include <ardour/route.h>
+#include <ardour/audio_track.h>
+#include <ardour/session.h>
+#include <ardour/location.h>
+#include <ardour/dB.h>
+
+using namespace ARDOUR;
+using namespace std;
+using namespace sigc;
+using namespace PBD;
+
+#include "i18n.h"
+
+#include <pbd/abstract_ui.cc>
+
+BaseUI::RequestType LEDChange = BaseUI::new_request_type ();
+BaseUI::RequestType Print = BaseUI::new_request_type ();
+BaseUI::RequestType SetCurrentTrack = BaseUI::new_request_type ();
+
+
+#include <tranzport_control_protocol.h>
+
+void
+TranzportControlProtocol::datawheel ()
+{
+	if ((buttonmask & ButtonTrackRight) || (buttonmask & ButtonTrackLeft)) {
+
+		/* track scrolling */
+		
+		if (_datawheel < WheelDirectionThreshold) {
+			next_track ();
+		} else {
+			prev_track ();
+		}
+
+		timerclear (&last_wheel_motion);
+		
+	} else if ((buttonmask & ButtonPrev) || (buttonmask & ButtonNext)) {
+
+		if (_datawheel < WheelDirectionThreshold) {
+			next_marker ();
+		} else {
+			prev_marker ();
+		}
+		
+		timerclear (&last_wheel_motion);
+		
+	} else if (buttonmask & ButtonShift) {
+		
+		/* parameter control */
+		
+		if (route_table[0]) {
+			switch (wheel_shift_mode) {
+			case WheelShiftGain:
+				if (_datawheel < WheelDirectionThreshold) {
+					step_gain_up ();
+				} else {
+					step_gain_down ();
+				}
+				break;
+			case WheelShiftPan:
+				if (_datawheel < WheelDirectionThreshold) {
+					step_pan_right ();
+				} else {
+					step_pan_left ();
+				}
+				break;
+				
+			case WheelShiftMarker:
+				break;
+				
+			case WheelShiftMaster:
+				break;
+				
+			}
+		}
+		
+		timerclear (&last_wheel_motion);
+		
+	} else {
+		
+		switch (wheel_mode) {
+		case WheelTimeline:
+			scroll ();
+			break;
+			
+		case WheelScrub:
+			scrub ();
+			break;
+			
+		case WheelShuttle:
+			shuttle ();
+			break;
+		}
+	}
+}
+
+void
+TranzportControlProtocol::scroll ()
+{
+	float m = 1.0;
+	if (_datawheel < WheelDirectionThreshold) {
+		m = 1.0;
+	} else {
+		m = -1.0;
+	}
+	switch(wheel_increment) {
+	case WheelIncrScreen: ScrollTimeline (0.2*m); break;
+	case WheelIncrSlave:
+	case WheelIncrSample:
+	case WheelIncrBeat:
+	case WheelIncrBar:
+	case WheelIncrSecond:
+	case WheelIncrMinute:
+	default: break; // other modes unimplemented as yet
+	}
+}
+
+void
+TranzportControlProtocol::scrub ()
+{
+	float speed;
+	struct timeval now;
+	struct timeval delta;
+	int dir;
+	
+	gettimeofday (&now, 0);
+	
+	if (_datawheel < WheelDirectionThreshold) {
+		dir = 1;
+	} else {
+		dir = -1;
+	}
+	
+	if (dir != last_wheel_dir) {
+		/* changed direction, start over */
+		speed = 0.1f;
+	} else {
+		if (timerisset (&last_wheel_motion)) {
+
+			timersub (&now, &last_wheel_motion, &delta);
+			
+			/* 10 clicks per second => speed == 1.0 */
+			
+			speed = 100000.0f / (delta.tv_sec * 1000000 + delta.tv_usec);
+			
+		} else {
+			
+			/* start at half-speed and see where we go from there */
+			
+			speed = 0.5f;
+		}
+	}
+	
+	last_wheel_motion = now;
+	last_wheel_dir = dir;
+	
+	set_transport_speed (speed * dir);
+}
+
+void
+TranzportControlProtocol::shuttle ()
+{
+	if (_datawheel < WheelDirectionThreshold) {
+		if (session->transport_speed() < 0) {
+			session->request_transport_speed (1.0);
+		} else {
+			session->request_transport_speed (session->transport_speed() + 0.1);
+		}
+	} else {
+		if (session->transport_speed() > 0) {
+			session->request_transport_speed (-1.0);
+		} else {
+			session->request_transport_speed (session->transport_speed() - 0.1);
+		}
+	}
+}
-- 
cgit v1.2.3