added sources for Slick

Former-commit-id: 1647fa32ef6894bd7db44f741f07c2f4dcdf9054
Former-commit-id: 0e5810dcfbe1fd59b13e7cabe9f1e93c5542da2d

lib/slick-source/org/newdawn/slick/openal/AudioImpl.java

@@ -0,0 +1,139 @@
+package org.newdawn.slick.openal;
+
+import org.lwjgl.openal.AL10;
+import org.lwjgl.openal.AL11;
+
+/**
+ * A sound that can be played through OpenAL
+ * 
+ * @author Kevin Glass
+ * @author Nathan Sweet <misc@n4te.com>
+ */
+public class AudioImpl implements Audio {
+	/** The store from which this sound was loaded */
+	private SoundStore store;
+	/** The buffer containing the sound */
+	private int buffer;
+	/** The index of the source being used to play this sound */
+	private int index = -1;
+	
+	/** The length of the audio */
+	private float length;
+	
+	/**
+	 * Create a new sound
+	 * 
+	 * @param store The sound store from which the sound was created
+	 * @param buffer The buffer containing the sound data
+	 */
+	AudioImpl(SoundStore store, int buffer) {
+		this.store = store;
+		this.buffer = buffer;
+		
+		int bytes = AL10.alGetBufferi(buffer, AL10.AL_SIZE);
+		int bits = AL10.alGetBufferi(buffer, AL10.AL_BITS);
+		int channels = AL10.alGetBufferi(buffer, AL10.AL_CHANNELS);
+		int freq = AL10.alGetBufferi(buffer, AL10.AL_FREQUENCY);
+		
+		int samples = bytes / (bits / 8);
+		length = (samples / (float) freq) / channels;
+	}
+	
+	/**
+	 * Get the ID of the OpenAL buffer holding this data (if any). This method
+	 * is not valid with streaming resources.
+	 * 
+	 * @return The ID of the OpenAL buffer holding this data 
+	 */
+	public int getBufferID() {
+		return buffer;
+	}
+	
+	/**
+	 *
+	 */
+	protected AudioImpl() {
+		
+	}
+	
+	/**
+	 * @see org.newdawn.slick.openal.Audio#stop()
+	 */
+	public void stop() {
+		if (index != -1) {
+			store.stopSource(index);
+			index = -1;
+		}
+	}
+	
+	/**
+	 * @see org.newdawn.slick.openal.Audio#isPlaying()
+	 */
+	public boolean isPlaying() {
+		if (index != -1) {
+			return store.isPlaying(index);
+		}
+		
+		return false;
+	}
+	
+	/**
+	 * @see org.newdawn.slick.openal.Audio#playAsSoundEffect(float, float, boolean)
+	 */
+	public int playAsSoundEffect(float pitch, float gain, boolean loop) {
+		index = store.playAsSound(buffer, pitch, gain, loop);
+		return store.getSource(index);
+	}
+
+
+	/**
+	 * @see org.newdawn.slick.openal.Audio#playAsSoundEffect(float, float, boolean, float, float, float)
+	 */
+	public int playAsSoundEffect(float pitch, float gain, boolean loop, float x, float y, float z) {
+		index = store.playAsSoundAt(buffer, pitch, gain, loop, x, y, z);
+		return store.getSource(index);
+	}
+	
+	/**
+	 * @see org.newdawn.slick.openal.Audio#playAsMusic(float, float, boolean)
+	 */
+	public int playAsMusic(float pitch, float gain, boolean loop) {
+		store.playAsMusic(buffer, pitch, gain, loop);
+		index = 0;
+		return store.getSource(0);
+	}
+	
+	/**
+	 * Pause the music currently being played
+	 */
+	public static void pauseMusic() {
+		SoundStore.get().pauseLoop();
+	}
+
+	/**
+	 * Restart the music currently being paused
+	 */
+	public static void restartMusic() {
+		SoundStore.get().restartLoop();
+	}
+	
+	/**
+	 * @see org.newdawn.slick.openal.Audio#setPosition(float)
+	 */
+	public boolean setPosition(float position) {
+		position = position % length;
+		
+		AL10.alSourcef(store.getSource(index), AL11.AL_SEC_OFFSET, position);
+		if (AL10.alGetError() != 0) {
+			return false;
+		}
+		return true;
+	}
+
+	/**
+	 * @see org.newdawn.slick.openal.Audio#getPosition()
+	 */
+	public float getPosition() {
+		return AL10.alGetSourcef(store.getSource(index), AL11.AL_SEC_OFFSET);
+	}
+}