Giving additional feedback when no audio input was found

This catches the issue when no audio input was found
This might catch the java exception that is thrown on some systems

You can test this when you deactivate every audio input on your operating system

Author: kroeder

MusicBeam/Info.plist.tmpl

@@ -21,9 +21,9 @@
 
     <!-- Customize this set as you wish -->
     <key>CFBundleShortVersionString</key>
-    <string>2.1.0</string>
+    <string>2.1.1</string>
     <key>CFBundleVersion</key>
-    <string>2.1.0</string>
+    <string>2.1.1</string>
     <key>CFBundleSignature</key>
     <string>com.codingjoe.MusicBeam</string>
     <key>NSHumanReadableCopyright</key>

MusicBeam/MusicBeam.pde

@@ -10,7 +10,7 @@ import controlP5.*;
 import ddf.minim.*;
 import ddf.minim.analysis.*;
 
-String version = "2.1.0";
+String version = "2.1.1";
 
 public Boolean debugMode = false;
 
@@ -48,6 +48,8 @@ int height = 570;
 float maxLevel = 0;
 float goalMaxLevel=0;
 void settings() {
+  initAudioInput();
+
   if(!hasEnoughScreenDevices()) {
       String msg = "No second screen device detected!\n"
         +"Please make sure to attach your video projector before you launch MusicBeam.\n"
@@ -56,6 +58,7 @@ void settings() {
       if (close == JOptionPane.NO_OPTION)
         System.exit(1);
     }
+
   size(width, height);
 }
 
@@ -64,13 +67,6 @@ void setup() {
   PImage titlebaricon = loadImage("icon.png");
   surface.setIcon(titlebaricon);
 
-  Minim minim = new Minim(this);
-  in = minim.getLineIn(Minim.STEREO, 512);
-
-  bdFreq = new BeatDetect(in.bufferSize(), in.sampleRate());
-  bdSound = new BeatDetect();
-
-
   colorMode(HSB, 360, 100, 100);
 
   initControls();
@@ -344,3 +340,22 @@ private boolean hasEnoughScreenDevices()
     return false;
   return true;
 }
+
+private void initAudioInput()
+{
+  String msg = "No audio input found!\n\n"
+             + "Please check the audio settings on your current operating system.\n"
+             + "There must be at least one audio input activated.";
+  
+  minim = new Minim(this);
+  in = minim.getLineIn(Minim.STEREO, 512);
+  
+  if(in == null)
+  {
+    JOptionPane.showMessageDialog(null, msg, "Device detection", JOptionPane.ERROR_MESSAGE);
+    System.exit(1);
+  }
+  
+  bdFreq = new BeatDetect(in.bufferSize(), in.sampleRate());
+  bdSound = new BeatDetect();
+}