From a0360d2a8edf9a64e4e249b481e4e4173583dc9d Mon Sep 17 00:00:00 2001
From: Dave French <dave.french3@googlemail.com>
Date: Thu, 26 Feb 2015 18:05:34 +0000
Subject: [PATCH] Delay effect, the delay time parameter now uses sample exact
 modeling

---
 plugins/Delay/DelayEffect.cpp | 8 ++++----
 plugins/Delay/DelayEffect.h   | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/plugins/Delay/DelayEffect.cpp b/plugins/Delay/DelayEffect.cpp
index 5b13b92a0..c90669ab9 100644
--- a/plugins/Delay/DelayEffect.cpp
+++ b/plugins/Delay/DelayEffect.cpp
@@ -84,24 +84,24 @@ bool DelayEffect::processAudioBuffer( sampleFrame* buf, const fpp_t frames )
 	double outSum = 0.0;
 	const float d = dryLevel();
 	const float w = wetLevel();
-	const float length = m_delayControls.m_delayTimeModel.value() * Engine::mixer()->processingSampleRate();
 	const float amplitude = m_delayControls.m_lfoAmountModel.value() * Engine::mixer()->processingSampleRate();
 	m_lfo->setFrequency( 1.0 / m_delayControls.m_lfoTimeModel.value() );
 	m_delay->setFeedback( m_delayControls.m_feedbackModel.value() );
 	sample_t dryS[2];
 	float lPeak = 0.0;
 	float rPeak = 0.0;
-	float incr = ( m_currentLength - length ) / frames;
+	ValueBuffer *lengthBuffer = m_delayControls.m_delayTimeModel.valueBuffer();
 	if( m_delayControls.m_outGainModel.isValueChanged() )
 	{
 		m_outGain = dbvToAmp( m_delayControls.m_outGainModel.value() );
 	}
 	for( fpp_t f = 0; f < frames; ++f )
 	{
-		m_currentLength -= incr;
 		dryS[0] = buf[f][0];
 		dryS[1] = buf[f][1];
-		m_delay->setLength( ( float )m_currentLength + ( amplitude * ( float )m_lfo->tick() ) );
+		float length = lengthBuffer ? lengthBuffer->values()[ f ] : m_delayControls.m_delayTimeModel.value();
+		length *= Engine::mixer()->processingSampleRate();
+		m_delay->setLength( length + ( amplitude * ( float )m_lfo->tick() ) );
 		m_delay->tick( buf[f] );
 
 		buf[f][0] *= m_outGain;
diff --git a/plugins/Delay/DelayEffect.h b/plugins/Delay/DelayEffect.h
index b98a19e70..af4f86b07 100644
--- a/plugins/Delay/DelayEffect.h
+++ b/plugins/Delay/DelayEffect.h
@@ -29,6 +29,7 @@
 #include "DelayControls.h"
 #include "Lfo.h"
 #include "StereoDelay.h"
+#include "ValueBuffer.h"
 
 class DelayEffect : public Effect
 {