Made input capture buffer circular and update waveform thumbnail while capturing audio.

Source/PluginEditor.cpp

@@ -97,8 +97,10 @@ void PaulstretchpluginAudioProcessorEditor::timerCallback(int id)
 		if (processor.isRecordingEnabled() != m_rec_enable.getToggleState())
 			m_rec_enable.setToggleState(processor.isRecordingEnabled(), dontSendNotification);
 		if (processor.isRecordingEnabled())
-			m_info_label.setText(String(processor.getRecordingPositionPercent()*100.0, 1),dontSendNotification);
+		{
-		else
+			m_wavecomponent.setRecordingPosition(processor.getRecordingPositionPercent());
+		} else
+			m_wavecomponent.setRecordingPosition(-1.0);
 		m_info_label.setText(String(processor.m_control->getStretchAudioSource()->m_param_change_count), dontSendNotification);
 	}
 }
@@ -116,6 +118,16 @@ void PaulstretchpluginAudioProcessorEditor::setAudioBuffer(AudioBuffer<float>* b
 	});
 }
 
+void PaulstretchpluginAudioProcessorEditor::beginAddingAudioBlocks(int channels, int samplerate, int totalllen)
+{
+	m_wavecomponent.beginAddingAudioBlocks(channels, samplerate, totalllen);
+}
+
+void PaulstretchpluginAudioProcessorEditor::addAudioBlock(AudioBuffer<float>& buf, int samplerate, int pos)
+{
+	m_wavecomponent.addAudioBlock(buf, samplerate, pos);
+}
+
 WaveformComponent::WaveformComponent(AudioFormatManager* afm) : m_thumbcache(100)
 {
 	TimeSelectionChangedCallback = [](Range<double>, int) {};
@@ -217,6 +229,12 @@ void WaveformComponent::paint(Graphics & g)
 		double pos = jmap<double>(CursorPosCallback(), m_view_range.getStart(), m_view_range.getEnd(), 0, getWidth());
 		g.fillRect((int)pos, m_topmargin, 1, getHeight() - m_topmargin);
 	}
+	if (m_rec_pos >= 0.0)
+	{
+		g.setColour(Colours::lightpink);
+		double pos = jmap<double>(m_rec_pos, m_view_range.getStart(), m_view_range.getEnd(), 0, getWidth());
+		g.fillRect((int)pos, m_topmargin, 1, getHeight() - m_topmargin);
+	}
 	g.setColour(Colours::aqua.darker());
 	g.drawText(m_curfile.getFullPathName(), 2, m_topmargin + 2, getWidth(), 20, Justification::topLeft);
 }
@@ -248,6 +266,18 @@ void WaveformComponent::setAudioBuffer(AudioBuffer<float>* buf, int samplerate,
 	m_thumb->addBlock(0, *buf, 0, len);
 }
 
+void WaveformComponent::beginAddingAudioBlocks(int channels, int samplerate, int totalllen)
+{
+	m_waveimage = Image();
+	m_curfile = File();
+	m_thumb->reset(channels, samplerate, totalllen);
+}
+
+void WaveformComponent::addAudioBlock(AudioBuffer<float>& buf, int samplerate, int pos)
+{
+	m_thumb->addBlock(pos, buf, 0, buf.getNumSamples());
+}
+
 void WaveformComponent::timerCallback()
 {
 	repaint();

Source/PluginEditor.h

@@ -79,6 +79,8 @@ public:
 	void paint(Graphics& g) override;
 	void setAudioFile(File f);
 	void setAudioBuffer(AudioBuffer<float>* buf, int samplerate, int len);
+	void beginAddingAudioBlocks(int channels, int samplerate, int totalllen);
+	void addAudioBlock(AudioBuffer<float>& buf, int samplerate, int pos);
 	void timerCallback() override;
 	std::function<double()> CursorPosCallback;
 	std::function<void(double)> SeekCallback;
@@ -105,6 +107,7 @@ public:
 	void setTimerEnabled(bool b);
 	void setViewRange(Range<double> rng);
 	Value ShowFileCacheRange;
+	void setRecordingPosition(double pos) { m_rec_pos = pos; }
 private:
 	AudioThumbnailCache m_thumbcache;
 
@@ -124,6 +127,7 @@ private:
 	Image m_waveimage;
 	OpenGLContext m_ogl;
 	bool m_use_opengl = false;
+	double m_rec_pos = 0.0;
 };
 
 
@@ -140,6 +144,8 @@ public:
 	void timerCallback(int id) override;
 	void setAudioFile(File f);
 	void setAudioBuffer(AudioBuffer<float>* buf, int samplerate, int len);
+	void beginAddingAudioBlocks(int channels, int samplerate, int totalllen);
+	void addAudioBlock(AudioBuffer<float>& buf, int samplerate, int pos);
 private:
     PaulstretchpluginAudioProcessor& processor;
 	std::vector<std::shared_ptr<ParameterComponent>> m_parcomps;

Source/PluginProcessor.cpp

@@ -10,7 +10,8 @@
 
 #include "PluginProcessor.h"
 #include "PluginEditor.h"
-std::unique_ptr<PropertiesFile> g_propsfile;
+#undef min
+#undef max
 
 //==============================================================================
 PaulstretchpluginAudioProcessor::PaulstretchpluginAudioProcessor()
@@ -30,7 +31,7 @@ PaulstretchpluginAudioProcessor::PaulstretchpluginAudioProcessor()
 	m_afm = std::make_unique<AudioFormatManager>();
 	m_afm->registerBasicFormats();
 	m_control = std::make_unique<Control>(m_afm.get());
-	m_control->setPreBufferAmount(3);
+	m_control->setPreBufferAmount(2);
 	m_control->ppar.pitch_shift.enabled = true;
 	m_control->ppar.freq_shift.enabled = true;
 	m_control->setOnsetDetection(0.0);
@@ -126,7 +127,7 @@ void PaulstretchpluginAudioProcessor::prepareToPlay(double sampleRate, int sampl
 	}
 	if (m_ready_to_play == false)
 	{
-		m_control->setFFTSize(0.7);
+		m_control->setFFTSize(0.2);
 		m_control->update_player_stretch();
 		m_control->update_process_parameters();
 		
@@ -169,6 +170,25 @@ bool PaulstretchpluginAudioProcessor::isBusesLayoutSupported (const BusesLayout&
 }
 #endif
 
+void copyAudioBufferWrappingPosition(const AudioBuffer<float>& src, AudioBuffer<float>& dest, int destbufpos, int maxdestpos)
+{
+	for (int i = 0; i < dest.getNumChannels(); ++i)
+	{
+		int channel_to_copy = i % src.getNumChannels();
+		if (destbufpos + src.getNumSamples() > maxdestpos)
+		{
+			int wrappos = (destbufpos + src.getNumSamples()) % maxdestpos;
+			int partial_len = src.getNumSamples() - wrappos;
+			dest.copyFrom(channel_to_copy, destbufpos, src, channel_to_copy, 0, partial_len);
+			dest.copyFrom(channel_to_copy, partial_len, src, channel_to_copy, 0, wrappos);
+		}
+		else
+		{
+			dest.copyFrom(channel_to_copy, destbufpos, src, channel_to_copy, 0, src.getNumSamples());
+		}
+	}
+}
+
 void PaulstretchpluginAudioProcessor::processBlock (AudioSampleBuffer& buffer, MidiBuffer& midiMessages)
 {
 	std::lock_guard<std::mutex> locker(m_mutex);
@@ -182,16 +202,13 @@ void PaulstretchpluginAudioProcessor::processBlock (AudioSampleBuffer& buffer, M
 		return;
 	if (m_is_recording == true)
 	{
-		if (m_rec_pos + buffer.getNumSamples() < m_recbuffer.getNumSamples())
+		int recbuflenframes = m_max_reclen * getSampleRate();
+		copyAudioBufferWrappingPosition(buffer, m_recbuffer, m_rec_pos, recbuflenframes);
+		callGUI([this, &buffer](PaulstretchpluginAudioProcessorEditor*ed) 
 		{
-			m_recbuffer.copyFrom(0, m_rec_pos, buffer, 0, 0, buffer.getNumSamples());
+			ed->addAudioBlock(buffer, getSampleRate(), m_rec_pos);
-			m_recbuffer.copyFrom(1, m_rec_pos, buffer, 1, 0, buffer.getNumSamples());
+		}, false);
-		}
+		m_rec_pos = (m_rec_pos + buffer.getNumSamples()) % recbuflenframes;
-		m_rec_pos += buffer.getNumSamples();
-		if (m_rec_pos >= m_max_reclen * getSampleRate())
-		{
-			finishRecording(m_max_reclen*getSampleRate());
-		}
 		return;
 	}
 	m_control->getStretchAudioSource()->val_MainVolume = (float)*getFloatParameter(0);
@@ -239,18 +256,23 @@ void PaulstretchpluginAudioProcessor::setStateInformation (const void* data, int
 void PaulstretchpluginAudioProcessor::setRecordingEnabled(bool b)
 {
 	std::lock_guard<std::mutex> locker(m_mutex);
+	int lenbufframes = getSampleRate()*m_max_reclen;
 	if (b == true)
 	{
 		m_recbuffer.setSize(2, m_max_reclen*getSampleRate()+4096);
 		m_recbuffer.clear();
 		m_rec_pos = 0;
+		callGUI([this,lenbufframes](PaulstretchpluginAudioProcessorEditor* ed) 
+		{
+			ed->beginAddingAudioBlocks(2, getSampleRate(), lenbufframes);
+		},false);
 		m_is_recording = true;
 	}
 	else
 	{
 		if (m_is_recording == true)
 		{
-			finishRecording(m_rec_pos);
+			finishRecording(lenbufframes);
 		}
 	}
 }
@@ -281,7 +303,7 @@ void PaulstretchpluginAudioProcessor::finishRecording(int lenrecording)
 	auto ed = dynamic_cast<PaulstretchpluginAudioProcessorEditor*>(getActiveEditor());
 	if (ed)
 	{
-		ed->setAudioBuffer(&m_recbuffer, getSampleRate(), lenrecording);
+		//ed->setAudioBuffer(&m_recbuffer, getSampleRate(), lenrecording);
 	}
 }
 

Source/PluginProcessor.h

@@ -71,7 +71,7 @@ private:
 	
 	bool m_ready_to_play = false;
 	AudioBuffer<float> m_recbuffer;
-	double m_max_reclen = 10.0;
+	double m_max_reclen = 5;
 	bool m_is_recording = false;
 	int m_rec_pos = 0;
 	void finishRecording(int lenrecorded);