Calculate smoothed prebuffering available amount in the processor

Source/PS_Source/globals.h

@@ -359,14 +359,20 @@ public:
 	}
 	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;
+		if (x != m_slope || sr != m_sr)
+		{
+			m_slope = x;
+			m_sr = sr;
+			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; }
+	double getSlope() const { return m_slope; }
+	double getSamplerate() const { return m_sr; }
 private:
 	double m_a, m_b, m_z;
 	double m_slope;
+	double m_sr = 0.0;
 };

Source/PluginEditor.cpp

@@ -1277,7 +1277,6 @@ 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 +1284,7 @@ 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_smoother.process(m_proc->getPreBufferingPercent());
+	double amt = m_proc->getPreBufferingPercent();
 	g.setColour(Colours::green);
 	int w = amt * getWidth();
     //g.setGradientFill(m_gradient);

Source/PluginEditor.h

@@ -113,7 +113,6 @@ public:
 	PaulstretchpluginAudioProcessor* m_proc = nullptr;
 private:
     ColourGradient m_gradient;
-	SignalSmoother m_smoother;
 };
 
 class MyThumbCache : public AudioThumbnailCache

Source/PluginProcessor.cpp

@@ -639,7 +639,9 @@ void PaulstretchpluginAudioProcessor::processBlock (AudioSampleBuffer& buffer, M
 	double srtemp = getSampleRate();
 	if (srtemp != m_cur_sr)
 		m_cur_sr = srtemp;
-    const int totalNumInputChannels  = getTotalNumInputChannels();
+	m_prebufsmoother.setSlope(0.9, srtemp / buffer.getNumSamples());
+	m_smoothed_prebuffer_ready = m_prebufsmoother.process(m_buffering_source->getPercentReady());
+	const int totalNumInputChannels  = getTotalNumInputChannels();
     const int totalNumOutputChannels = getTotalNumOutputChannels();
 	for (int i = 0; i < totalNumInputChannels; ++i)
 		m_input_buffer.copyFrom(i, 0, buffer, i, 0, buffer.getNumSamples());
@@ -822,7 +824,7 @@ double PaulstretchpluginAudioProcessor::getPreBufferingPercent()
 {
 	if (m_buffering_source==nullptr)
 		return 0.0;
-	return m_buffering_source->getPercentReady();
+	return m_smoothed_prebuffer_ready;
 }
 
 void PaulstretchpluginAudioProcessor::timerCallback(int id)

Source/PluginProcessor.h

@@ -235,7 +235,8 @@ private:
 	std::unique_ptr<MyBufferingAudioSource> m_buffering_source;
 	int m_prebuffer_amount = 1;
 	bool m_recreate_buffering_source = true;
-	
+	double m_smoothed_prebuffer_ready = 0.0;
+	SignalSmoother m_prebufsmoother;
 	int m_fft_size_to_use = 1024;
 	double m_last_outpos_pos = 0.0;
 	double m_last_in_pos = 0.0;