Merge pull request LMMS#1802 from curlymorphic/saBassBoost

Enable sample exact controls for BassBoost plugin

plugins/BassBooster/BassBooster.cpp

@@ -83,18 +83,45 @@ bool BassBoosterEffect::processAudioBuffer( sampleFrame* buf, const fpp_t frames
 	if( m_bbControls.m_gainModel.isValueChanged() ) { changeGain(); }
 	if( m_bbControls.m_ratioModel.isValueChanged() ) { changeRatio(); }
 
+	float gain = m_bbControls.m_gainModel.value();
+	ValueBuffer *gainBuffer = m_bbControls.m_gainModel.valueBuffer();
+	int gainInc = gainBuffer ? 1 : 0;
+	float *gainPtr = gainBuffer ? &( gainBuffer->values()[ 0 ] ) : &gain;
+
 	double outSum = 0.0;
 	const float d = dryLevel();
 	const float w = wetLevel();
-	for( fpp_t f = 0; f < frames; ++f )
+	if( gainBuffer )
 	{
-		outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1];
-
-		sample_t s[2] = { buf[f][0], buf[f][1] };
-		m_bbFX.nextSample( s[0], s[1] );
-
-		buf[f][0] = d * buf[f][0] + w * s[0];
-		buf[f][1] = d * buf[f][1] + w * s[1];
+		//process period using sample exact data
+		for( fpp_t f = 0; f < frames; ++f )
+		{
+			m_bbFX.leftFX().setGain( *gainPtr );
+			m_bbFX.rightFX().setGain( *gainPtr );
+			outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1];
+
+			sample_t s[2] = { buf[f][0], buf[f][1] };
+			m_bbFX.nextSample( s[0], s[1] );
+
+			buf[f][0] = d * buf[f][0] + w * s[0];
+			buf[f][1] = d * buf[f][1] + w * s[1];
+			gainPtr += gainInc;
+		}
+	} else
+	{
+		//process period without sample exact data
+		m_bbFX.leftFX().setGain( *gainPtr );
+		m_bbFX.rightFX().setGain( *gainPtr );
+		for( fpp_t f = 0; f < frames; ++f )
+		{
+			outSum += buf[f][0]*buf[f][0] + buf[f][1]*buf[f][1];
+
+			sample_t s[2] = { buf[f][0], buf[f][1] };
+			m_bbFX.nextSample( s[0], s[1] );
+
+			buf[f][0] = d * buf[f][0] + w * s[0];
+			buf[f][1] = d * buf[f][1] + w * s[1];
+		}
 	}
 
 	checkGate( outSum / frames );