visualizer: properly skip frequency spectrum mode without fftw

src/enums.cpp

@@ -148,9 +148,11 @@ std::ostream &operator<<(std::ostream& os, VisualizerType vt)
 		case VisualizerType::WaveFilled:
 			os << "sound wave filled";
 			break;
+#		ifdef HAVE_FFTW3_H
 		case VisualizerType::Spectrum:
 			os << "frequency spectrum";
 			break;
+#		endif // HAVE_FFTW3_H
 		case VisualizerType::Ellipse:
 			os << "sound ellipse";
 			break;
@@ -166,8 +168,10 @@ std::istream &operator>>(std::istream& is, VisualizerType &vt)
 		vt = VisualizerType::Wave;
 	else if (svt == "wave_filled")
 		vt = VisualizerType::WaveFilled;
+#	ifdef HAVE_FFTW3_H
 	else if (svt == "spectrum")
 		vt = VisualizerType::Spectrum;
+#	endif // HAVE_FFTW3_H
 	else if (svt == "ellipse")
 		vt = VisualizerType::Ellipse;
 	else

src/enums.h

@@ -21,6 +21,7 @@
 #ifndef NCMPCPP_ENUMS_H
 #define NCMPCPP_ENUMS_H
 
+#include "config.h"
 #include <iostream>
 
 enum class SpaceAddMode { AddRemove, AlwaysAdd };
@@ -39,7 +40,14 @@ enum class Design { Classic, Alternative };
 std::ostream &operator<<(std::ostream &os, Design ui);
 std::istream &operator>>(std::istream &is, Design &ui);
 
-enum class VisualizerType { Wave, WaveFilled, Spectrum, Ellipse };
+enum class VisualizerType {
+	Wave,
+	WaveFilled,
+#	ifdef HAVE_FFTW3_H
+	Spectrum,
+#	endif // HAVE_FFTW3_H
+	Ellipse
+};
 std::ostream &operator<<(std::ostream &os, VisualizerType vt);
 std::istream &operator>>(std::istream &is, VisualizerType &vt);
 

src/visualizer.cpp

@@ -195,11 +195,17 @@ void Visualizer::spacePressed()
 			Config.visualizer_type = VisualizerType::WaveFilled;
 			break;
 		case VisualizerType::WaveFilled:
+#			ifdef HAVE_FFTW3_H
 			Config.visualizer_type = VisualizerType::Spectrum;
+#			else
+			Config.visualizer_type = VisualizerType::Ellipse;
+#			endif // HAVE_FFTW3_H
 			break;
+#		ifdef HAVE_FFTW3_H
 		case VisualizerType::Spectrum:
 			Config.visualizer_type = VisualizerType::Ellipse;
 			break;
+#		endif // HAVE_FFTW3_H
 		case VisualizerType::Ellipse:
 			Config.visualizer_type = VisualizerType::Wave;
 			break;