make visualizer work after mpd restart

src/ncmpcpp.cpp

@@ -203,6 +203,11 @@ int main(int argc, char *argv[])
 #				ifdef ENABLE_OUTPUTS
 				myOutputs->FetchList();
 #				endif // ENABLE_OUTPUTS
+#				ifdef ENABLE_VISUALIZER
+				myVisualizer->ResetFD();
+				if (myScreen == myVisualizer)
+					myVisualizer->SetFD();
+#				endif // ENABLE_VISUALIZER
 			}
 		}
 		

src/visualizer.cpp

@@ -44,7 +44,7 @@ void Visualizer::Init()
 	w = new Window(0, MainStartY, COLS, MainHeight, "", Config.main_color, brNone);
 	w->SetTimeout(Config.visualizer_fifo_path.empty() ? ncmpcpp_window_timeout : 40 /* this gives us 25 fps */);
 	
-	itsFifo = -1;
+	ResetFD();
 	itsFreqsMagnitude = new unsigned[FFTResults];
 	itsInput = static_cast<double *>(fftw_malloc(sizeof(double)*Samples));
 	itsOutput = static_cast<fftw_complex *>(fftw_malloc(sizeof(fftw_complex)*FFTResults));
@@ -67,8 +67,7 @@ void Visualizer::SwitchTo()
 	myScreen = this;
 	w->Clear();
 	
-	if (itsFifo < 0 && (itsFifo = open(Config.visualizer_fifo_path.c_str(), O_RDONLY | O_NONBLOCK)) < 0)
+	SetFD();
-		ShowMessage("Couldn't open fifo for reading PCM data: %s", strerror(errno));
 	
 	Global::RedrawHeader = 1;
 }
@@ -127,5 +126,16 @@ void Visualizer::Update()
 	w->Refresh();
 }
 
+void Visualizer::SetFD()
+{
+	if (itsFifo < 0 && (itsFifo = open(Config.visualizer_fifo_path.c_str(), O_RDONLY | O_NONBLOCK)) < 0)
+		ShowMessage("Couldn't open fifo for reading PCM data: %s", strerror(errno));
+}
+
+void Visualizer::ResetFD()
+{
+	itsFifo = -1;
+}
+
 #endif // ENABLE_VISUALIZER
 

src/visualizer.h

@@ -51,6 +51,9 @@ class Visualizer : public Screen<Window>
 		
 		virtual bool allowsSelection() { return false; }
 		
+		void SetFD();
+		void ResetFD();
+		
 	protected:
 		virtual void Init();