calculate playspead based on fpd & fix wrong clip reset

This commit calculates the play speed for a looperclip based on the frames per beat, this avoids displacement due to different clip length
Also there was a wrong clip reset when the playhead gets reset in getSample because of the end of buffer. This is not really a nice fix but works for further testing of clipsync

src/looper.cxx

@@ -127,8 +127,8 @@ void Looper::process(unsigned int nframes, Buffers* buffers)
 			clips[clip]->record( nframes, inputL, inputR);
 		} else if ( clips[clip]->playing() ) {
 			// copy data into tmpBuffer, then pitch-stretch into track buffer
-			long targetFrames = clips[clip]->getBeats() * fpb;
-			long actualFrames = clips[clip]->getActualAudioLength();//getBufferLenght();
+			long targetFrames = fpb;
+			long actualFrames = clips[clip]->getRecFpb();//getBufferLenght();
 #ifdef DEBUG_TIME
 				cout << "FPB: " << fpb << "\n";
 				cout << "Target: " << targetFrames << " - Actual: " << actualFrames << "\n";

src/looperclip.cxx

@@ -200,6 +200,9 @@ void LooperClip::record(int count, float* L, float* R)
 			}
 		}
 	}
+
+	_loaded = true;
+	_recFpb = jack->getTimeManager()->getFpb();
 }
 
 unsigned long LooperClip::recordSpaceAvailable()
@@ -254,6 +257,8 @@ void LooperClip::bar()
 
 	if ( _playing ) {
 		_barsPlayed++;
+		cout << "Clip " << track << ":" << scene << " " << _playhead
+		     << "\n";
 	}
 
 	// FIXME assumes 4 beats in a bar
@@ -444,6 +449,15 @@ void LooperClip::getSample(long double playSpeed, float* L, float* R)
 		     _playhead >= _buffer->getSize() ||
 		     _playhead < 0  ) {
 			resetPlayHead();
+			
+			// FIXME is there a better way than just output 0 if frames are missing?
+			*L = 0.f;
+			*R = 0.f;
+			_playhead += playSpeed;
+			return;
+
+			EventGuiPrint e( "LooperClip resetting _playhead" );
+			//writeToGuiRingbuffer( &e );
 		}
 
 		std::vector<float>& vL = _buffer->getDataL();

src/looperclip.hxx

@@ -89,6 +89,10 @@ public:
 	long  getActualAudioLength();
 	/// Return Size of the Buffer
 	size_t audioBufferSize();
+	int
+	getRecFpb() {
+		return _recFpb;
+	};
 
 	/// Queue Play
 	void  queuePlay();
@@ -141,6 +145,7 @@ private:
 
 	long double _playhead;
 	float _recordhead;
+	int _recFpb;
 
 	unsigned int _barsPlayed;
 	AudioBuffer* _buffer;