initial controllers code

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@883 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/core/controller.cpp

@@ -0,0 +1,110 @@
+#ifndef SINGLE_SOURCE_COMPILE
+
+/*
+ * controller.cpp - implementation of class controller which handles remote-control
+ *                  of automatableModels
+ *
+ * Copyright (c) 2008 Paul Giblock <drfaygo/at/gmail.com>
+ *
+ * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
+ *
+ * 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 (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <math.h>
+#include <Qt/QtXml>
+#include <QtCore/QObject>
+#include <QtCore/QVector>
+
+
+#include "song.h"
+#include "engine.h"
+#include "mixer.h"
+#include "controller.h"
+
+unsigned int controller::s_frames = 0;
+QVector<controller *> controller::s_controllers;
+
+controller::controller( void )
+{
+	s_controllers.append( this );
+}
+
+
+controller::~controller()
+{
+	s_controllers.remove( s_controllers.indexOf( this ) );
+
+}
+
+
+// Get current value, with an offset into the current buffer for sample exactness
+float controller::currentValue( int _offset )
+{
+	if( _offset == 0 || isSampleExact() )
+	{
+		m_currentValue = value( _offset );
+	}
+	
+	return m_currentValue;
+}
+
+
+float controller::value( int _offset )
+{
+	// 44100 frames/sec
+	return 0.5 + sinf((float)(runningFrames()) / 44100.0f) / 2;
+}
+	
+
+
+// Get position in frames
+int controller::runningFrames()
+{
+	return s_frames;
+}
+
+// Get position in seconds
+float controller::runningTime()
+{
+	return s_frames /
+			engine::getMixer()->sampleRate() ;
+}
+
+
+void controller::triggerFrameCounter( void )
+{
+	for( int i = 0; i < s_controllers.size(); ++i ) 
+	{
+		emit s_controllers.at(i)->valueChanged();
+	}
+
+	s_frames += engine::getMixer()->framesPerPeriod();
+	//emit s_signaler.triggerValueChanged();
+}
+
+void controller::resetFrameCounter( void )
+{
+	s_frames = 0;
+}
+
+
+
+#include "controller.moc"
+
+
+#endif