Instrument: introduced flags to replace virtual property getters

There'll be more and more flags for instruments. Handling them using
virtual and overloaded getter functions doesn't scale well and adds
unneccessary overhead.

plugins/opl2/opl2instrument.h

@@ -48,7 +48,10 @@ public:
 	virtual QString nodeName() const;
 	virtual PluginView * instantiateView( QWidget * _parent );
 
-	inline virtual bool isMidiBased() const { return true; }
+	virtual Flags flags() const
+	{
+		return IsSingleStreamed | IsMidiBased;
+	}
 
 	virtual bool handleMidiEvent( const MidiEvent& event, const MidiTime& time );
 	virtual void play( sampleFrame * _working_buffer );

plugins/sf2_player/sf2_player.h

@@ -2,7 +2,7 @@
  * sf2_player.h - a soundfont2 player using fluidSynth
  *
  * Copyright (c) 2008 Paul Giblock <drfaygo/at/gmail/dot/com>
- * Copyright (c) 2009-2013 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ * Copyright (c) 2009-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
  * 
  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
  *
@@ -77,9 +77,9 @@ public:
 		return 0;
 	}
 
-	virtual bool isMidiBased() const
+	virtual Flags flags() const
 	{
-		return true;
+		return IsSingleStreamed | IsMidiBased;
 	}
 
 	virtual PluginView * instantiateView( QWidget * _parent );

plugins/vestige/vestige.h

@@ -63,9 +63,9 @@ public:
 
 	virtual void loadFile( const QString & _file );
 
-	virtual bool isMidiBased( void ) const
+	virtual Flags flags() const
 	{
-		return true;
+		return IsSingleStreamed | IsMidiBased;
 	}
 
 	virtual bool handleMidiEvent( const MidiEvent& event, const MidiTime& time );

plugins/vibed/vibed.h

@@ -52,11 +52,12 @@ public:
 
 	virtual QString nodeName() const;
 
-	inline virtual bool isBendable() const
+	virtual Flags flags() const
 	{
-		return( false );
+		return IsNotBendable;
 	}
 
+
 	virtual PluginView * instantiateView( QWidget * _parent );
 
 

plugins/zynaddsubfx/ZynAddSubFx.h

@@ -80,9 +80,9 @@ public:
 
 	virtual QString nodeName() const;
 
-	virtual bool isMidiBased() const
+	virtual Flags flags() const
 	{
-		return true;
+		return IsSingleStreamed | IsMidiBased;
 	}
 
 	virtual PluginView * instantiateView( QWidget * _parent );