Implemented free filter processing. Note that the envelope manipulation from the GUI is not handled thread safely yet

Source/PS_Source/ProcessedStretch.cpp

@@ -39,6 +39,12 @@ void ProcessedStretch::set_parameters(ProcessParameters *ppar)
 	pars=*ppar;
 	//update_free_filter();
 }
+
+void ProcessedStretch::setFreeFilterEnvelope(shared_envelope env)
+{
+	m_free_filter_envelope = env;
+}
+
 void ProcessedStretch::setBufferSize(int sz)
 {
 	jassert(sz > 0);
@@ -125,6 +131,8 @@ void ProcessedStretch::process_spectrum(REALTYPE *freq)
 			spectrum_do_filter(pars,nfreq,samplerate,infreq.data(), freq);
 		if (e.m_index == 7 && e.m_enabled == true)
 			spectrum_do_compressor(pars,nfreq, infreq.data(), freq);
+		if (e.m_index == 8 && e.m_enabled == true)
+			spectrum_do_free_filter(m_free_filter_envelope, nfreq, samplerate, infreq.data(), freq);
 	}
 
 #ifdef USE_OLD_SPEC_PROC

Source/PS_Source/ProcessedStretch.h

@@ -21,6 +21,7 @@
 
 #include "FreeEdit.h"
 #include "Stretch.h"
+#include "../jcdp_envelope.h"
 
 struct ProcessParameters
 {
@@ -413,6 +414,25 @@ inline void spectrum_do_filter(const ProcessParameters& pars, int nfreq, double
 	};
 };
 
+inline void spectrum_do_free_filter(shared_envelope& env, int nfreq, double samplerate,
+	REALTYPE *freq1, REALTYPE *freq2) 
+{
+	jassert(env != nullptr);
+	for (int i = 0; i<nfreq; i++) 
+	{
+		double binhz = (samplerate / 2.0) / nfreq * i;
+		if (binhz >= 30.0)
+		{
+			double norm = jmap<double>(binhz, 0.0, samplerate / 2.0, 0.0, 1.0);
+			double db = jmap<double>(env->GetInterpolatedNodeValue(pow(norm, 0.25)), 0.0, 1.0, -36.0, 12.0);
+			freq2[i] = freq1[i] * Decibels::decibelsToGain(db);
+		}
+		else
+			freq2[i] = freq1[i];
+	};
+};
+
+
 class SpectrumProcess
 {
 public:
@@ -430,13 +450,14 @@ public:
     ProcessedStretch(REALTYPE rap_,int in_bufsize_,FFTWindow w=W_HAMMING,bool bypass_=false,REALTYPE samplerate_=44100.0f,int stereo_mode=0);
     ~ProcessedStretch();
     void set_parameters(ProcessParameters *ppar);
+	void setFreeFilterEnvelope(shared_envelope env);
 	std::vector<SpectrumProcess> m_spectrum_processes;
 	void setBufferSize(int sz) override;
 private:
     REALTYPE get_stretch_multiplier(REALTYPE pos_percents) override;
 //		void process_output(REALTYPE *smps,int nsmps);
     void process_spectrum(REALTYPE *freq) override;
-    
+	shared_envelope m_free_filter_envelope;
 
     //void copy(const realvector& freq1,realvector& freq2);
     void copy(REALTYPE* freq1, REALTYPE* freq2);

Source/PS_Source/StretchSource.cpp

@@ -80,6 +80,16 @@ std::pair<Range<double>, Range<double>> StretchAudioSource::getFileCachedRangesN
 	return m_inputfile->getCachedRangesNormalized();
 }
 
+void StretchAudioSource::setFreeFilterEnvelope(shared_envelope env)
+{
+	ScopedLock locker(m_cs);
+	m_free_filter_envelope = env;
+	for (int i = 0; i < m_stretchers.size(); ++i)
+	{
+		m_stretchers[i]->setFreeFilterEnvelope(env);
+	}
+}
+
 ValueTree StretchAudioSource::getStateTree()
 {
 	ValueTree tree("stretchsourcestate");
@@ -456,6 +466,7 @@ void StretchAudioSource::initObjects()
 		m_stretchers[i]->set_onset_detection_sensitivity(onsetsens);
 		m_stretchers[i]->set_parameters(&m_ppar);
 		m_stretchers[i]->set_freezing(m_freezing);
+		m_stretchers[i]->setFreeFilterEnvelope(m_free_filter_envelope);
 		fill_container(m_stretchers[i]->out_buf, 0.0f);
 		m_stretchers[i]->m_spectrum_processes = m_specproc_order;
 	}

Source/PS_Source/StretchSource.h

@@ -88,6 +88,8 @@ public:
     int getFFTWindowingType() { return m_fft_window_type; }
     std::pair<Range<double>,Range<double>> getFileCachedRangesNormalized();
 	
+	void setFreeFilterEnvelope(shared_envelope env);
+
 	ValueTree getStateTree();
 	void setStateTree(ValueTree state);
 	void setClippingEnabled(bool b) { m_clip_output = b; }
@@ -144,6 +146,7 @@ private:
 	int64_t m_output_length = 0;
 	bool m_clip_output = true;
 	void initObjects();
+	shared_envelope m_free_filter_envelope;
 	AudioFormatManager* m_afm = nullptr;
 	struct
 	{

Source/PluginEditor.cpp

@@ -34,7 +34,15 @@ PaulstretchpluginAudioProcessorEditor::PaulstretchpluginAudioProcessorEditor(Pau
 {
     //addAndMakeVisible(&m_free_filter_component);
     m_free_filter_component.set_envelope(processor.m_free_filter_envelope);
-    m_wavefilter_tab.setTabBarDepth(17);
+	m_free_filter_component.TimeFromNormalized = [this](double x) 
+	{ 
+		return jmap<double>(pow(x, 4.0), 0.0, 1.0, 30.0, processor.getSampleRateChecked()/2.0);
+	};
+	m_free_filter_component.ValueFromNormalized = [this](double x)
+	{
+		return jmap<double>(x, 0.0, 1.0, -36.0, 12.0);
+	};
+	m_wavefilter_tab.setTabBarDepth(20);
     
     addAndMakeVisible(&m_perfmeter);
 	
@@ -822,9 +830,9 @@ void SpectralChainEditor::paint(Graphics & g)
 	for (int i = 0; i < m_order.size(); ++i)
 	{
 		//if (i!=m_cur_index)
-			drawBox(g, i, i*box_w, 0, box_w - 30, box_h);
+			drawBox(g, i, i*box_w, 0, box_w - 20, box_h);
 		if (i<m_order.size() - 1)
-			g.drawArrow(juce::Line<float>(i*box_w + (box_w - 30), box_h / 2, i*box_w + box_w, box_h / 2), 2.0f, 15.0f, 15.0f);
+			g.drawArrow(juce::Line<float>(i*box_w + (box_w - 20), box_h / 2, i*box_w + box_w, box_h / 2), 2.0f, 12.0f, 12.0f);
 	}
 	if (m_drag_x>=0 && m_drag_x<getWidth() && m_cur_index>=0)
 		drawBox(g, m_cur_index, m_drag_x, 0, box_w - 30, box_h);

Source/PluginProcessor.cpp

@@ -82,6 +82,8 @@ PaulstretchpluginAudioProcessor::PaulstretchpluginAudioProcessor()
 	m_playposinfo.timeInSeconds = 0.0;
 	
     m_free_filter_envelope = std::make_shared<breakpoint_envelope>();
+	m_free_filter_envelope->AddNode({ 0.0,0.5 });
+	m_free_filter_envelope->AddNode({ 1.0,0.5 });
 
     m_recbuffer.setSize(2, 44100);
 	m_recbuffer.clear();
@@ -364,7 +366,7 @@ void PaulstretchpluginAudioProcessor::setFFTSize(double size)
 void PaulstretchpluginAudioProcessor::startplay(Range<double> playrange, int numoutchans, int maxBlockSize, String& err)
 {
 	m_stretch_source->setPlayRange(playrange, true);
-
+	m_stretch_source->setFreeFilterEnvelope(m_free_filter_envelope);
 	int bufamt = m_bufamounts[m_prebuffer_amount];
 
 	if (m_buffering_source != nullptr && numoutchans != m_buffering_source->getNumberOfChannels())

Source/PluginProcessor.h

@@ -170,7 +170,7 @@ public:
 	bool m_show_technical_info = false;
 	Range<double> m_wave_view_range;
     int m_prepare_count = 0;
-    std::shared_ptr<breakpoint_envelope> m_free_filter_envelope;
+    shared_envelope m_free_filter_envelope;
 private:
 	
 	

Source/jcdp_envelope.h

@@ -576,6 +576,7 @@ private:
     nodes_t m_old_nodes;
     nodes_t m_repeater_nodes;
     grid_t m_value_grid;
+	JUCE_LEAK_DETECTOR(breakpoint_envelope)
 };
 
 template<typename F, typename... Args>
@@ -586,5 +587,6 @@ inline double derivative(const F& f, double x, const Args&... func_args)
 	return (f(x + epsilon, func_args...) - f(x, func_args...)) / epsilon;
 }
 
+using shared_envelope = std::shared_ptr<breakpoint_envelope>;
 
 #endif // JCDP_ENVELOPE_H