Style and trying to find issue with uninitialized return buffer from VDL

src/ITAVariableDelayLine.cpp

@@ -16,7 +16,7 @@
 
 
 // Interpolation resampling factor range (otherwise crossfading is used)
-#define MIN_RESAMPLING_FACTOR 0.0f // [0, inf) ... aber sinnvoll z.B. 0, 0.1, 0.5 (< 1)
+#define MIN_RESAMPLING_FACTOR 0.01f // [0, inf) ... aber sinnvoll z.B. 0, 0.1, 0.5 (< 1)
 #define MAX_RESAMPLING_FACTOR 25.0f // [0, inf) ... aber sinnvoll z.B. 1, 1.5, 2, 3 (> 1)
 
 
@@ -61,7 +61,8 @@ CITAVariableDelayLine::CITAVariableDelayLine( double dSamplerate,
 	Clear();
 }
 
-void CITAVariableDelayLine::Clear() {
+void CITAVariableDelayLine::Clear()
+{
 	m_psbVDLBuffer->Zero();
 	m_psbTemp->Zero();
 
@@ -157,7 +158,8 @@ void CITAVariableDelayLine::ReserveMaximumDelaySamples( float fMaxDelaySamples )
 	{
 
 		// Puffer schon gross genug => Nichts tun...
-		if( m_psbVDLBuffer->length() >= iNewBufferSize ) return;
+		if( m_psbVDLBuffer->length() >= iNewBufferSize )
+			return;
 
 		m_swBufferSizeInc.start();
 
@@ -284,7 +286,8 @@ void CITAVariableDelayLine::Process( const ITASampleBuffer* psbInput, ITASampleB
 
 	// --= Keine nderung der Verzgerung (fr rasant schnelle statische Szenen) =--
 
-	if( fNewDelay == fCurrentDelay ) {
+	if( fNewDelay == fCurrentDelay )
+	{
 		// Keine nderung der Verzgerung. Einfach Anfang der VDL in den Ausgang kopieren.
 		int iReadCursor = ( m_iWriteCursor + m_iVDLBufferSize - ( int ) ceil( fCurrentDelay ) ) % m_iVDLBufferSize;
 		psbOutput->cyclic_write( m_psbVDLBuffer, m_iBlockLength, iReadCursor, 0 );
@@ -441,6 +444,12 @@ void CITAVariableDelayLine::Process( const ITASampleBuffer* psbInput, ITASampleB
 		int iInputStartOffset = iLeft;
 		m_pInterpolationRoutine->Interpolate( m_psbTemp, iInputLength, iInputStartOffset, psbOutput, m_iBlockLength );
 
+		for( int k = 0; k < psbOutput->GetLength(); k++ )
+		{
+			if( isnan( psbOutput->GetData()[ k ] ) )
+				ITA_EXCEPT1( INVALID_PARAMETER, "VDL produced NAN value when switching from " + IntToString( iCurrentIntDelay ) + " to " + IntToString( iNewIntDelay ) + " with interpolation" );
+		}
+
 		break;