-Updated engine to record / playback loop

debug.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+cd .build/
+
+gdb ./luppp5

src/buffers.hxx

@@ -0,0 +1,21 @@
+
+#ifndef LUPPP_BUFFERS_H
+#define LUPPP_BUFFERS_H
+
+class Buffers
+{
+  public:
+    Buffers()
+    {
+      memset( audio, 0, sizeof(float*)*2);
+    }
+    float* audio[2];
+    
+    enum BUFFER {
+      MASTER_OUTPUT = 0,
+      MASTER_INPUT,
+    };
+};
+
+#endif // LUPPP_BUFFERS_H
+

src/event.hxx

@@ -11,6 +11,8 @@
   
 */
 
+#include "looper.hxx"
+
 namespace Event
 {
   enum {
@@ -18,6 +20,8 @@ namespace Event
     PLAY_SAMPLE,
     MASTER_VOL,
     RECORD,
+    
+    LOOPER_STATE,
   };
 };
 
@@ -47,6 +51,17 @@ class EventMasterVol : public EventBase
     }
 };
 
+class EventLooperState : public EventBase
+{
+  public:
+    int type() { return int(LOOPER_STATE); }
+    uint32_t size() { return sizeof(EventLooperState); }
+    
+    Looper::State state;
+    EventLooperState(){}
+    EventLooperState(Looper::State s) : state(s){}
+};
+
 class EventLoadSample : public EventBase
 {
   public:

src/eventhandlerdsp.cxx

@@ -56,6 +56,12 @@ void handleDspEvents()
             jack_ringbuffer_read( rbToDsp, (char*)&ev, sizeof(EventRecord) );
             //jack->setRecord( ev.track, ev.record );
           } break; }
+        case Event::LOOPER_STATE: {
+          if ( availableRead >= sizeof(EventLooperState) ) {
+            EventLooperState ev;
+            jack_ringbuffer_read( rbToDsp, (char*)&ev, sizeof(EventLooperState) );
+            jack->setLooperState( 0, ev.state );
+          } break; }
         default:
           {
             // just do nothing

src/gtrack.hxx

@@ -2,6 +2,8 @@
 #ifndef LUPPP_G_TRACK_H
 #define LUPPP_G_TRACK_H
 
+#include <iostream>
+
 #include <FL/Fl.H>
 #include <FL/Fl_Group.H>
 #include <FL/Fl_Slider.H>
@@ -10,6 +12,26 @@
 #include "avtk/avtk_button.h"
 #include "avtk/avtk_background.h"
 
+
+#include "eventhandler.hxx"
+
+using namespace std;
+
+static void button_callback(Fl_Widget *w, void *data) {
+  cout << "Button " << w->label() << " clicked" << endl;
+  
+  if ( strcmp( w->label() , "Rec" ) == 0 )
+  {
+    EventLooperState e = EventLooperState(Looper::STATE_RECORDING);
+    writeToDspRingbuffer( &e );
+  }
+  else if ( strcmp( w->label() , "Play" ) == 0 )
+  {
+    EventLooperState e = EventLooperState(Looper::STATE_PLAYING);
+    writeToDspRingbuffer( &e );
+  }
+}
+
 class GTrack : public Fl_Group
 {
   public:
@@ -18,8 +40,8 @@ class GTrack : public Fl_Group
       title( strdup(l) ),
       bg( x, y , w, h, title ),
       
-      button1(x + 5, y + 24, 18, 18,"1"),
+      button1(x + 5, y + 24, 100, 18,"Rec"),
-      button2(x + 5, y + 44, 18, 18,"2"),
+      button2(x + 5, y + 44, 100, 18,"Play"),
       button3(x + 5, y + 64, 18, 18,"3"),
       button4(x + 5, y + 84, 18, 18,"4"),
       button5(x + 5, y +104, 18, 18,"5"),
@@ -29,6 +51,9 @@ class GTrack : public Fl_Group
       dial2(x+45, y +155, 24, 24, "B"),
       dial3(x+75, y +155, 24, 24, "C")
     {
+      button1.callback( button_callback, 0 );
+      button2.callback( button_callback, 0 );
+      
       end(); // close the group
     }
     

src/jack.cxx

@@ -38,6 +38,8 @@ Jack::Jack()
   {
     cerr << "Jack() error setting process callback" << endl;
   }
+  
+  loopers.push_back( new Looper() );
 }
 
 
@@ -59,6 +61,9 @@ int Jack::process (jack_nframes_t nframes)
   // pre-zero output buffers
   memset( buffers.audio[Buffers::MASTER_OUTPUT], 0, sizeof(float) * nframes );
   
+  loopers.at(0)->process(nframes, &buffers );
+  
+  /*
   float* input = buffers.audio[Buffers::MASTER_INPUT];
   float* output = buffers.audio[Buffers::MASTER_OUTPUT];
   
@@ -66,6 +71,7 @@ int Jack::process (jack_nframes_t nframes)
   {
     *output++ = *input++;
   }
+  */
   
   return false;
 }

src/jack.hxx

@@ -11,24 +11,14 @@
 */
 
 // Library
+#include <vector>
 #include <cstring>
 #include <jack/jack.h>
 #include <jack/midiport.h>
 
-class Buffers
+#include "looper.hxx"
-{
+
-  public:
+using namespace std;
-    Buffers()
-    {
-      memset( audio, 0, sizeof(float*)*2);
-    }
-    float* audio[2];
-    
-    enum BUFFER {
-      MASTER_OUTPUT = 0,
-      MASTER_INPUT,
-    };
-};
 
 class Jack
 {
@@ -38,10 +28,17 @@ class Jack
     void activate();
     int getBuffersize();
     int getSamplerate();
+    
+    void setLooperState(int, Looper::State s)
+    {
+      loopers.at(0)->setState(s);
+    }
   
   private:
     Buffers buffers;
     
+    vector<Looper*> loopers;
+    
     int nframes;
     int samplerate;
     

src/looper.hxx

@@ -0,0 +1,85 @@
+
+#ifndef LUPPP_LOOPER_H
+#define LUPPP_LOOPER_H
+
+#include <iostream>
+
+#include "buffers.hxx"
+
+using namespace std;
+
+class Looper
+{
+  public:
+    enum State {
+      STATE_PLAYING = 0,
+      STATE_RECORDING,
+    };
+    
+    Looper() :
+      state(STATE_PLAYING),
+      endPoint   (0),
+      playPoint  (0)
+    {
+      
+    }
+    
+    void setState(State s)
+    {
+      // quantize?!
+      state = s;
+      
+      if ( state == STATE_PLAYING ) // setup PLAY
+      {
+        endPoint = lastWrittenSampleIndex;
+        playPoint = 0;
+        cout << "State = PLAYING, endPoint = " << endPoint << endl;
+      }
+      else if ( state == STATE_RECORDING ) // setup REC
+      {
+        cout << "State = RECORDING" << endl;
+        playPoint = 0;
+        endPoint = 0;
+        lastWrittenSampleIndex = 0;
+      }
+      
+    }
+    
+    void process(int nframes, Buffers* buffers)
+    {
+      float* in  = buffers->audio[Buffers::MASTER_INPUT];
+      float* out = buffers->audio[Buffers::MASTER_OUTPUT];
+      
+      if ( state == STATE_PLAYING )
+      {
+        for(int i = 0; i < nframes; i++)
+        {
+          if ( playPoint >= endPoint )
+          {
+            playPoint = 0;
+          }
+          out[i] += sample[playPoint++];
+        }
+      }
+      
+      else if ( state == STATE_RECORDING )
+      {
+        for(int i = 0; i < nframes; i++)
+        {
+          if ( lastWrittenSampleIndex < 44100 * 60 )
+          {
+            sample[lastWrittenSampleIndex++] = in[i];
+          }
+        }
+      }
+    }
+  
+  private:
+    State state;
+    
+    int endPoint, playPoint, lastWrittenSampleIndex;
+    float sample[44100*60];
+  
+};
+
+#endif // LUPPP_LOOPER_H