From d42971e09f30c56307fcf8de722cd7204b3be050 Mon Sep 17 00:00:00 2001
From: xenakios <xenakios@gmail.com>
Date: Tue, 1 May 2018 17:54:20 +0300
Subject: [PATCH] Added simple signal smoother class. Use that to smooth out
 the buffer amount component display.

---
 Source/PS_Source/globals.h | 32 +++++++++++++++++++++++++++++++-
 Source/PluginEditor.cpp    |  4 ++--
 Source/PluginEditor.h      |  1 +
 readme.txt                 |  2 +-
 4 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/Source/PS_Source/globals.h b/Source/PS_Source/globals.h
index 1d037ee..478f23c 100644
--- a/Source/PS_Source/globals.h
+++ b/Source/PS_Source/globals.h
@@ -339,4 +339,34 @@ inline void sanitizeTimeRange(double& t0, double& t1)
 		t1 = t0 + 0.001;
 }
 
-inline double fractpart(double x) { return x - (int)x; };
\ No newline at end of file
+inline double fractpart(double x) { return x - (int)x; };
+
+class SignalSmoother
+{
+public:
+	SignalSmoother()
+	{
+		m_a = 0.5;
+		m_slope = m_a;
+		m_b = 1.0 - m_a;
+		m_z = 0;
+	}
+	inline double process(double in)
+	{
+		double result = in + m_a * (m_z - in);
+		m_z = result;
+		return result; 
+	}
+	void setSlope(double x, double sr)
+	{
+		m_slope = x;
+		double srCompensate = srCompensate = sr / 100.0;
+		double compensated_a = powf(x, (1.0 / srCompensate));
+		m_a = compensated_a;
+		m_b = 1.0 - m_a;
+	}
+	double slope() const { return m_slope; }
+private:
+	double m_a, m_b, m_z;
+	double m_slope;
+};
diff --git a/Source/PluginEditor.cpp b/Source/PluginEditor.cpp
index e1d7091..7ab4622 100644
--- a/Source/PluginEditor.cpp
+++ b/Source/PluginEditor.cpp
@@ -1277,7 +1277,7 @@ PerfMeterComponent::PerfMeterComponent(PaulstretchpluginAudioProcessor * p)
     m_gradient.addColour(0.0, Colours::red);
     m_gradient.addColour(0.25, Colours::yellow);
     m_gradient.addColour(1.0, Colours::green);
-    
+	m_smoother.setSlope(0.9, 10.0);
 }
 
 void PerfMeterComponent::paint(Graphics & g)
@@ -1285,7 +1285,7 @@ void PerfMeterComponent::paint(Graphics & g)
     m_gradient.point1 = {0.0f,0.0f};
     m_gradient.point2 = {(float)getWidth(),0.0f};
     g.fillAll(Colours::grey);
-	double amt = m_proc->getPreBufferingPercent();
+	double amt = m_smoother.process(m_proc->getPreBufferingPercent());
 	g.setColour(Colours::green);
 	int w = amt * getWidth();
     //g.setGradientFill(m_gradient);
diff --git a/Source/PluginEditor.h b/Source/PluginEditor.h
index e2d7473..831cd82 100644
--- a/Source/PluginEditor.h
+++ b/Source/PluginEditor.h
@@ -113,6 +113,7 @@ public:
 	PaulstretchpluginAudioProcessor* m_proc = nullptr;
 private:
     ColourGradient m_gradient;
+	SignalSmoother m_smoother;
 };
 
 class MyThumbCache : public AudioThumbnailCache
diff --git a/readme.txt b/readme.txt
index 1f31680..6d35720 100644
--- a/readme.txt
+++ b/readme.txt
@@ -7,7 +7,7 @@ Copyright (C) 2017-2018 Xenakios
 Released under GNU General Public License v.2 license.
 
 History :
-04-27-2018 1.1.3
+05-01-2018 1.1.3
 	-Changed "Octaves" module to "Ratios". The Ratios module has more shifters than the previous 
 	 Octaves module and allows changing the pitch ratios (and the shifters mix) 
 	 in a separate tabbed page in the GUI.