Sanitize output of all effects when exporting

include/MixHelpers.h

@@ -33,6 +33,8 @@ namespace MixHelpers
 
 bool isSilent( const sampleFrame* src, int frames );
 
+bool sanitize( sampleFrame * src, int frames );
+
 /*! \brief Add samples from src to dst */
 void add( sampleFrame* dst, const sampleFrame* src, int frames );
 

src/core/EffectChain.cpp

@@ -31,7 +31,8 @@
 #include "engine.h"
 #include "debug.h"
 #include "DummyEffect.h"
-
+#include "MixHelpers.h"
+#include "song.h"
 
 
 EffectChain::EffectChain( Model * _parent ) :
@@ -194,6 +195,11 @@ bool EffectChain::processAudioBuffer( sampleFrame * _buf, const fpp_t _frames, b
 	{
 		return false;
 	}
+	const bool exporting = engine::getSong()->isExporting();
+	if( exporting ) // strip infs/nans if exporting
+	{
+		MixHelpers::sanitize( _buf, _frames );
+	}
 
 	bool moreEffects = false;
 	for( EffectList::Iterator it = m_effects.begin(); it != m_effects.end(); ++it )
@@ -201,6 +207,10 @@ bool EffectChain::processAudioBuffer( sampleFrame * _buf, const fpp_t _frames, b
 		if( hasInputNoise || ( *it )->isRunning() )
 		{
 			moreEffects |= ( *it )->processAudioBuffer( _buf, _frames );
+			if( exporting ) // strip infs/nans if exporting
+			{
+				MixHelpers::sanitize( _buf, _frames );
+			}
 		}
 
 #ifdef LMMS_DEBUG

src/core/MixHelpers.cpp

@@ -69,6 +69,25 @@ bool isSilent( const sampleFrame* src, int frames )
 }
 
 
+/*! \brief Function for sanitizing a buffer of infs/nans - returns true if those are found */
+bool sanitize( sampleFrame * src, int frames )
+{
+	bool found = false;
+	for( int f = 0; f < frames; ++f )
+	{
+		for( int c = 0; c < 2; ++c )
+		{
+			if( isinff( src[f][c] ) || isnanf( src[f][c] ) )
+			{
+				src[f][c] = 0.0f;
+				found = true;
+			}
+		}
+	}
+	return found;
+}
+
+
 struct AddOp
 {
 	void operator()( sampleFrame& dst, const sampleFrame& src ) const