-Working on track metering

src/avtk/avtk_background.h

@@ -44,6 +44,8 @@ class Background : public Fl_Widget
       
       label = _label;
       
+      printf("AVTK background label: %s\n", label );
+      
       highlight = false;
     }
     bool highlight;

src/dsp/dsp_dbmeter.hxx

@@ -0,0 +1,73 @@
+
+#ifndef OPENAV_DSP_DBMETER_H
+#define OPENAV_DSP_DBMETER_H
+
+
+#include <math.h>
+#include <cmath>
+#include <cstdlib>
+
+float fabsf(float dummy0);
+float log10f(float dummy0);
+
+class DBMeter
+{
+  public:
+    DBMeter(int rate)
+    {
+      fSamplingFreq = rate;
+      fConst0 = (96.f / float(min(192000, max(1, fSamplingFreq))));
+      
+      fRec0[0] = -96.f;
+      fRec0[1] = -96.f;
+      fRec1[0] = -96.f;
+      fRec1[1] = -96.f;
+    }
+    
+    int getNumInputs() { return 2;}
+    int getNumOutputs(){ return 2;}
+    
+    // call this to get the current dB value, range = -96 -> +10
+    float getLeftDB()
+    {
+      return fvbargraph0;
+    }
+    float getRightDB()
+    {
+      return fvbargraph1;
+    }
+    
+    void process(int count, float** inputs, float** outputs)
+    {
+      float* input0 = inputs[0];
+      float* input1 = inputs[1];
+      float* output0 = outputs[0];
+      float* output1 = outputs[1];
+      for (int i = 0; (i < count); i = (i + 1))
+      {
+        float fTemp0 = float(input0[i]);
+        fRec0[0] = max((fRec0[1] - fConst0), min(10.f, (20.f * log10f(max(1.58489e-05f, fabsf(fTemp0))))));
+        fvbargraph0 = fRec0[0];
+        output0[i] = float(fTemp0);
+        
+        float fTemp1 = float(input1[i]);
+        fRec1[0] = max((fRec1[1] - fConst0), min(10.f, (20.f * log10f(max(1.58489e-05f, fabsf(fTemp1))))));
+        fvbargraph1 = fRec1[0];
+        output1[i] = float(fTemp1);
+        
+        fRec0[1] = fRec0[0];
+        fRec1[1] = fRec1[0];
+      }
+    }
+  
+  private:
+    float fRec0[2];
+    float fRec1[2];
+    int fSamplingFreq;
+    float fConst0;
+    float fvbargraph0;
+    float fvbargraph1;
+};
+
+#endif // OPENAV_DSP_DBMETER_H
+

src/gui.cxx

@@ -61,12 +61,14 @@ Gui::Gui() :
   tooltipLabel->hide();
   //tooltipLabel->align( FL_ALIGN_TOP_LEFT );
   
+  window.resizable( headerImage );
   
   int i = 0;
   for (; i < NTRACKS; i++ )
   {
     stringstream s;
     s << "Track " << i+1;
+    printf("track name %s\n", s.str().c_str() );
     tracks.push_back( new GTrack(8 + i * 118, 40, 110, 600, s.str().c_str() ) );
   }
   

src/jack.cxx

@@ -71,6 +71,8 @@ Jack::Jack()
     
     loopers.push_back( new Looper(i) );
     timeManager.registerObserver( loopers.back() );
+    
+    dbMeters.push_back( new DBMeter( buffers.samplerate ) );
   }
   
   timeManager.registerObserver( &metronome );
@@ -135,6 +137,8 @@ int Jack::process (jack_nframes_t nframes)
   
   // mixdown tracks into master output buffer
   float* output = buffers.audio[Buffers::MASTER_OUTPUT];
+  
+  
   for(int i = 0; i < nframes; i++)
   {
     float tmp = 0.f;

src/jack.hxx

@@ -22,6 +22,8 @@
 #include "metronome.hxx"
 #include "timemanager.hxx"
 
+#include "dsp/dsp_dbmeter.hxx"
+
 #include "controllerupdater.hxx"
 
 using namespace std;
@@ -62,6 +64,7 @@ class Jack
     ControllerUpdater controllerUpdater;
     
     vector<Looper*> loopers;
+    vector<DBMeter*> dbMeters;
     
     int nframes;
     int samplerate;