view src/com/aurellem/capture/audio/AudioSendRenderer.java @ 34:13d354e1184b

trying to track down very strange bug where a listener and aux listener at the same location hear different things
author Robert McIntyre <rlm@mit.edu>
date Sun, 30 Oct 2011 14:58:01 -0700
parents be37291c62b8
children 2a525e937d86
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1 package com.aurellem.capture.audio;
3 import java.lang.reflect.Field;
4 import java.nio.ByteBuffer;
5 import java.util.HashMap;
6 import java.util.Vector;
7 import java.util.concurrent.CountDownLatch;
8 import java.util.logging.Level;
9 import java.util.logging.Logger;
11 import javax.sound.sampled.AudioFormat;
13 import org.lwjgl.LWJGLException;
14 import org.lwjgl.openal.AL;
15 import org.lwjgl.openal.AL10;
16 import org.lwjgl.openal.ALCdevice;
17 import org.lwjgl.openal.OpenALException;
19 import com.aurellem.send.AudioSend;
20 import com.jme3.audio.Listener;
21 import com.jme3.audio.lwjgl.LwjglAudioRenderer;
22 import com.jme3.math.Vector3f;
23 import com.jme3.util.BufferUtils;
25 public class AudioSendRenderer
27 extends LwjglAudioRenderer implements MultiListener {
29 private AudioSend audioSend;
30 private static final AudioFormat outFormat = new AudioFormat(44100.0f, 32, 1, true, false);
32 /**
33 * Keeps track of all the listeners which have been registered so far.
34 * The first element is <code>null</code>, which represents the zeroth
35 * LWJGL listener which is created automatically.
36 */
37 public Vector<Listener> listeners = new Vector<Listener>();
39 public void initialize(){
40 super.initialize();
41 listeners.add(null);
42 }
44 /**
45 * This is to call the native methods which require the OpenAL device ID.
46 * currently it is obtained through reflection.
47 */
48 private long deviceID;
50 /**
51 * To ensure that <code>deviceID<code> and <code>listeners<code> are
52 * properly initialized before any additional listeners are added.
53 */
54 private CountDownLatch latch = new CountDownLatch(1);
56 /**
57 * Each listener (including the main LWJGL listener) can be registered
58 * with a <code>SoundProcessor</code>, which this Renderer will call whenever
59 * there is new audio data to be processed.
60 */
61 public HashMap<Listener, SoundProcessor> soundProcessorMap =
62 new HashMap<Listener, SoundProcessor>();
65 /**
66 * Create a new slave context on the recorder device which will render all the
67 * sounds in the main LWJGL context with respect to this listener.
68 */
69 public void addListener(Listener l) {
70 try {this.latch.await();}
71 catch (InterruptedException e) {e.printStackTrace();}
72 audioSend.addListener();
73 this.listeners.add(l);
74 l.setRenderer(this);
75 }
77 /**
78 * Whenever new data is rendered in the perspective of this listener,
79 * this Renderer will send that data to the SoundProcessor of your choosing.
80 */
81 public void registerSoundProcessor(Listener l, SoundProcessor sp) {
82 this.soundProcessorMap.put(l, sp);
83 }
85 /**
86 * Registers a SoundProcessor for the main LWJGL context. IF all you want to
87 * do is record the sound you would normally hear in your application, then
88 * this is the only method you have to worry about.
89 */
90 public void registerSoundProcessor(SoundProcessor sp){
91 // register a sound processor for the default listener.
92 this.soundProcessorMap.put(null, sp);
93 }
95 private static final Logger logger =
96 Logger.getLogger(AudioSendRenderer.class.getName());
100 /**
101 * Instead of taking whatever device is available on the system, this call
102 * creates the "Multiple Audio Send" device, which supports multiple listeners in a limited
103 * capacity. For each listener, the device renders it not to the sound device, but
104 * instead to buffers which it makes available via JNI.
105 */
106 public void initInThread(){
107 try{
108 if (!AL.isCreated()){
109 AL.create("Multiple Audio Send", (int) outFormat.getSampleRate(), 60, false);
110 }
111 }catch (OpenALException ex){
112 logger.log(Level.SEVERE, "Failed to load audio library", ex);
113 System.exit(1);
114 return;
115 }catch (LWJGLException ex){
116 logger.log(Level.SEVERE, "Failed to load audio library", ex);
117 System.exit(1);
118 return;
119 }
120 super.initInThread();
122 ALCdevice device = AL.getDevice();
124 // RLM: use reflection to grab the ID of our device for use later.
125 try {
126 Field deviceIDField;
127 deviceIDField = ALCdevice.class.getDeclaredField("device");
128 deviceIDField.setAccessible(true);
129 try {deviceID = (Long)deviceIDField.get(device);}
130 catch (IllegalArgumentException e) {e.printStackTrace();}
131 catch (IllegalAccessException e) {e.printStackTrace();}
132 deviceIDField.setAccessible(false);}
133 catch (SecurityException e) {e.printStackTrace();}
134 catch (NoSuchFieldException e) {e.printStackTrace();}
136 this.audioSend = new AudioSend(this.deviceID);
138 // The LWJGL context must be established as the master context before
139 // any other listeners can be created on this device.
140 audioSend.initDevice();
141 // Now, everything is initialized, and it is safe to add more listeners.
142 latch.countDown();
143 }
146 public void cleanup(){
147 for(SoundProcessor sp : this.soundProcessorMap.values()){
148 sp.cleanup();
149 }
150 super.cleanup();
151 }
153 public void updateAllListeners(){
154 for (int i = 0; i < this.listeners.size(); i++){
155 Listener lis = this.listeners.get(i);
156 if (null != lis){
157 Vector3f location = lis.getLocation();
158 Vector3f velocity = lis.getVelocity();
159 Vector3f orientation = lis.getUp();
160 float gain = lis.getVolume();
161 audioSend.setNthListener3f(AL10.AL_POSITION,
162 location.x, location.y, location.z, i);
163 audioSend.setNthListener3f(AL10.AL_VELOCITY,
164 velocity.x, velocity.y, velocity.z, i);
165 audioSend.setNthListener3f(AL10.AL_ORIENTATION,
166 orientation.x, orientation.y, orientation.z, i);
167 audioSend.setNthListenerf(AL10.AL_GAIN, gain, i);
168 }
169 }
170 }
173 //public final static int BYTES_PER_SAMPLE = 4;
174 private ByteBuffer buffer = BufferUtils.createByteBuffer(4096);
176 public void dispatchAudio(float tpf){
177 int samplesToGet = (int) (tpf * outFormat.getSampleRate());
178 try {latch.await();}
179 catch (InterruptedException e) {e.printStackTrace();}
180 audioSend.step(samplesToGet);
181 updateAllListeners();
183 for (int i = 0; i < this.listeners.size(); i++){
184 buffer.clear();
185 audioSend.getSamples(buffer, samplesToGet, i);
186 SoundProcessor sp =
187 this.soundProcessorMap.get(this.listeners.get(i));
188 if (null != sp){sp.process(buffer, samplesToGet*outFormat.getFrameSize(), outFormat);}
189 }
191 }
193 public void update(float tpf){
194 super.update(tpf);
195 dispatchAudio(tpf);
196 }
198 }