More sounds! Closes #4

core/src/com/me/pacman/Sound.java

@@ -54,20 +54,25 @@ public class Sound {
         return id;
     }
 
+    public boolean isLooping(Effect effect) {
+        return playing[effect.ordinal()] > -1;
+    }
+
     public void stop(Effect effect) {
-        long id = playing[effect.ordinal()];
         com.badlogic.gdx.audio.Sound sound = getSound(effect);
+        long id = playing[effect.ordinal()];
+        if (id > -1) {
             sound.stop(id);
             playing[effect.ordinal()] = -1;
         }
+    }
 
     public void stopAll() {
         for (int i = 0; i < playing.length; i++) {
             if (playing[i] < 0) {
                 continue;
             }
-            getSound(Effect.values()[i]).stop(playing[i]);
-            playing[i] = -1;
+            stop(Effect.values()[i]);
         }
     }
 

core/src/com/me/pacman/entity/Ghost.java

@@ -123,6 +123,7 @@ public class Ghost extends MovableEntity {
 
             if (currentPath instanceof EnterGhostHousePath) {
                 inHouse = true;
+                state.updateBackgroundAudio();
             }
             currentPath = null;
         }

core/src/com/me/pacman/state/PlayState.java

@@ -12,6 +12,7 @@ import com.me.pacman.PacDude;
 import com.me.pacman.Sound;
 import com.me.pacman.entity.*;
 import com.me.pacman.entity.ai.ReturnToBase;
+import com.me.pacman.entity.path.EnterGhostHousePath;
 import com.me.pacman.level.Level;
 import com.me.pacman.level.LevelTile;
 import com.me.pacman.level.Modifiers;
@@ -98,6 +99,32 @@ public class PlayState extends LevelState {
         super(game);
     }
 
+    public void updateBackgroundAudio() {
+        for (Ghost ghost : ghosts) {
+            if ((ghost.currentBehaviour instanceof ReturnToBase
+                    || ghost.currentPath instanceof EnterGhostHousePath) && !ghost.inHouse) {
+                if (!game.sound.isLooping(Sound.Effect.RETURN_BASE)) {
+                    game.sound.stopAll();
+                    game.sound.loop(Sound.Effect.RETURN_BASE);
+                }
+                return;
+            }
+        }
+
+        if (frightTimer > 0) {
+            if (!game.sound.isLooping(Sound.Effect.FRIGHT)) {
+                game.sound.stopAll();
+                game.sound.loop(Sound.Effect.FRIGHT);
+            }
+            return;
+        }
+
+        if (!game.sound.isLooping(Sound.Effect.SIREN)) {
+            game.sound.stopAll();
+            game.sound.loop(Sound.Effect.SIREN);
+        }
+    }
+
     private void setGameState(GameState state) {
         this.state = state;
         this.stateTimer = state.timer;
@@ -162,6 +189,7 @@ public class PlayState extends LevelState {
 
         initializeLevel();
 
+        game.sound.stopAll();
         game.sound.play(Sound.Effect.BEGINNING);
     }
 
@@ -199,38 +227,33 @@ public class PlayState extends LevelState {
         setGameState(GameState.PRE_NEW_GAME);
     }
 
-    public void stateTransition() {
+    public GameState stateTransition() {
         switch (state) {
             // The state we're transitioning /from/
             case PRE_NEW_GAME:
                 newGame();
-                setGameState(GameState.START_ROUND_WAIT);
-                break;
+                return GameState.START_ROUND_WAIT;
             case START_ROUND_WAIT:
             case NEW_ROUND_WAIT:
                 startGame();
-                setGameState(GameState.PLAYING);
-                break;
+                return GameState.PLAYING;
             case ROUND_WON_WAIT:
-                setGameState(GameState.ROUND_WON);
-                break;
+                return GameState.ROUND_WON;
             case ROUND_WON:
                 newRound();
-                setGameState(GameState.NEW_ROUND_WAIT);
-                break;
+                return GameState.NEW_ROUND_WAIT;
             case GAME_OVER:
                 preNewGame();
-                setGameState(GameState.PRE_NEW_GAME);
-                break;
+                return GameState.PRE_NEW_GAME;
             case GHOST_CAUGHT_POINTS_WAIT:
-                setGameState(GameState.PLAYING);
-                break;
+                updateBackgroundAudio();
+                return GameState.PLAYING;
             case PACMAN_CAUGHT_WAIT:
                 game.sound.play(Sound.Effect.DEATH);
                 pacman.alive = false;
-                setGameState(GameState.PACMAN_CAUGHT);
-                break;
+                return GameState.PACMAN_CAUGHT;
         }
+        return null;
     }
 
     @Override
@@ -337,6 +360,8 @@ public class PlayState extends LevelState {
         frightTimer = Modifiers.getFrightTime(round);
         ghostsCaught = 0;
         score += 50;
+
+        updateBackgroundAudio();
     }
 
     private void pacmanCaught() {
@@ -357,6 +382,7 @@ public class PlayState extends LevelState {
         ghostsCaught++;
         score += ghostsCaught * 200;
 
+        game.sound.play(Sound.Effect.EAT_GHOST);
         setGameState(GameState.GHOST_CAUGHT_POINTS_WAIT);
     }
 
@@ -379,6 +405,8 @@ public class PlayState extends LevelState {
                 ghost.caught = false;
                 ghost.currentBehaviour = ghost.chaseBehaviour;
             }
+
+            updateBackgroundAudio();
         }
     }
 
@@ -464,7 +492,7 @@ public class PlayState extends LevelState {
         if (state.timer > 0) {
             stateTimer -= dt;
             if (stateTimer <= 0) {
-                stateTransition();
+                setGameState(stateTransition());
             }
         }
     }