Implement playback speed in replays.

src/itdelatrisu/opsu/replay/PlaybackSpeed.java

@@ -0,0 +1,50 @@
+package itdelatrisu.opsu.replay;
+
+import itdelatrisu.opsu.GameImage;
+import itdelatrisu.opsu.GameMod;
+import org.newdawn.slick.Image;
+
+public enum PlaybackSpeed {
+	NORMAL(GameImage.REPLAY_1XPLAYBACK, 1f),
+	DOUBLE(GameImage.REPLAY_2XPLAYBACK, 2f),
+	HALF(GameImage.REPLAY_05XPLAYBACK, 0.5f);
+
+	/** The file name of the button image. */
+	private GameImage gameImage;
+
+	/** The speed modifier of the playback. */
+	private float modifier;
+
+	PlaybackSpeed(GameImage gameImage, float modifier) {
+		this.gameImage = gameImage;
+		this.modifier = modifier;
+	}
+
+	private static int index = 1;
+
+	public static PlaybackSpeed next() {
+		PlaybackSpeed next = values()[index++ % values().length];
+		if((GameMod.DOUBLE_TIME.isActive() && next == PlaybackSpeed.DOUBLE) ||
+				(GameMod.HALF_TIME.isActive() && next == PlaybackSpeed.HALF))
+			next = next();
+
+		return next;
+	}
+
+	public static void reset() {
+		index = 1;
+	}
+
+	/**
+	 * Returns the image.
+	 * @return the associated image
+	 */
+	public Image getImage() { return gameImage.getImage(); }
+
+	/**
+	 * Returns the speed modifier.
+	 * @return the speed
+	 */
+	public float getModifier() { return modifier; }
+}
+