* sf2Player: retrieve resampling-interpolation from current mixer quality settings

* mixer: made m_writing-variable in fifoWriter volatile
* projectRenderer: change audio-device to file-device from within GUI-thread in order to make slots being connected to sampleRateChanged()-signal being called 
immediately
* audioDevice: made HQ-mode for audio-devices optional



git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@959 0778d3d1-df1d-0410-868b-ea421aaaa00d

plugins/sf2_player/sf2_player.cpp

@@ -423,7 +423,8 @@ void sf2Instrument::updateSampleRate( void )
 			src_delete( m_srcState );
 		}
 		int error;
-		m_srcState = src_new( SRC_SINC_MEDIUM_QUALITY,
+		m_srcState = src_new( engine::getMixer()->
+				currentQualitySettings().libsrcInterpolation(),
 					DEFAULT_CHANNELS, &error );
 		if( m_srcState == NULL || error )
 		{
@@ -452,7 +453,7 @@ void sf2Instrument::playNote( notePlayHandle * _n, bool, sampleFrame * )
 		return;
 	}
 
-	if ( tfp == 0 )
+	if( tfp == 0 )
 	{
 		_n->m_pluginData = new int( midiNote );
 
@@ -464,11 +465,6 @@ void sf2Instrument::playNote( notePlayHandle * _n, bool, sampleFrame * )
 		++m_notesRunning[midiNote];
 		m_notesRunningMutex.unlock();
 	}
-	else if( _n->released() )
-	{
-		// Doesn't happen with release frames = 0
-	}
-
 }