jme3-examples: add TestDeviceDisconnect class

jme3-examples/src/main/java/jme3test/audio/TestAudioDeviceDisconnect.java

@@ -0,0 +1,63 @@
+package jme3test.audio;
+
+import com.jme3.app.SimpleApplication;
+import com.jme3.audio.AudioData;
+import com.jme3.audio.AudioNode;
+import com.jme3.input.KeyInput;
+import com.jme3.input.controls.ActionListener;
+import com.jme3.input.controls.KeyTrigger;
+import com.jme3.input.controls.Trigger;
+
+/**
+ * This test demonstrates that destroying and recreating the OpenAL Context
+ * upon device disconnection is not an optimal solution.
+ *
+ * As shown, AudioNode instances playing in a loop cease to play after a device disconnection
+ * and would require explicit restarting.
+ *
+ * This test serves solely to highlight this issue,
+ * which should be addressed with a more robust solution within
+ * the ALAudioRenderer class in a dedicated future pull request on Git.
+ */
+public class TestAudioDeviceDisconnect extends SimpleApplication implements ActionListener {
+
+    public static void main(String[] args) {
+        TestAudioDeviceDisconnect test = new TestAudioDeviceDisconnect();
+        test.start();
+    }
+
+    private AudioNode audioSource;
+
+    @Override
+    public void simpleInitApp() {
+        audioSource = new AudioNode(assetManager,
+                "Sound/Environment/Ocean Waves.ogg", AudioData.DataType.Buffer);
+        audioSource.setName("Waves");
+        audioSource.setLooping(true);
+        rootNode.attachChild(audioSource);
+
+        audioSource.play();
+
+        registerInputMappings();
+    }
+
+    @Override
+    public void onAction(String name, boolean isPressed, float tpf) {
+        if (!isPressed) return;
+
+        if (name.equals("play")) {
+            // re-play active sounds
+            audioSource.play();
+        }
+    }
+
+    private void registerInputMappings() {
+        addMapping("play", new KeyTrigger(KeyInput.KEY_SPACE));
+    }
+
+    private void addMapping(String mappingName, Trigger... triggers) {
+        inputManager.addMapping(mappingName, triggers);
+        inputManager.addListener(this, mappingName);
+    }
+
+}