Mercurial > jmeCapture

annotate src/com/aurellem/capture/AudioSend.java @ 3:a92de00f0414

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migrating files
author Robert McIntyre <rlm@mit.edu>
date Tue, 25 Oct 2011 11:55:55 -0700
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rlm@3 1 package com.aurellem.capture;
rlm@3 2
rlm@3 3 import java.lang.reflect.Field;
rlm@3 4 import java.nio.ByteBuffer;
rlm@3 5 import java.util.HashMap;
rlm@3 6 import java.util.Vector;
rlm@3 7 import java.util.concurrent.CountDownLatch;
rlm@3 8 import java.util.logging.Level;
rlm@3 9 import java.util.logging.Logger;
rlm@3 10
rlm@3 11 import org.lwjgl.LWJGLException;
rlm@3 12 import org.lwjgl.openal.AL;
rlm@3 13 import org.lwjgl.openal.AL10;
rlm@3 14 import org.lwjgl.openal.ALCdevice;
rlm@3 15 import org.lwjgl.openal.OpenALException;
rlm@3 16
rlm@3 17 import com.jme3.audio.Listener;
rlm@3 18 import com.jme3.audio.lwjgl.LwjglAudioRenderer;
rlm@3 19 import com.jme3.math.Vector3f;
rlm@3 20 import com.jme3.util.BufferUtils;
rlm@3 21
rlm@3 22 public class AudioSend
rlm@3 23 extends LwjglAudioRenderer implements MultiListener {
rlm@3 24
rlm@3 25 /**
rlm@3 26 * Keeps track of all the listeners which have been registered so far.
rlm@3 27 * The first element is <code>null</code>, which represents the zeroth
rlm@3 28 * LWJGL listener which is created automatically.
rlm@3 29 */
rlm@3 30 public Vector<Listener> listeners = new Vector<Listener>();
rlm@3 31
rlm@3 32 public void initialize(){
rlm@3 33 super.initialize();
rlm@3 34 listeners.add(null);
rlm@3 35 }
rlm@3 36
rlm@3 37 /**
rlm@3 38 * This is to call the native methods which require the OpenAL device ID.
rlm@3 39 * currently it is obtained through reflection.
rlm@3 40 */
rlm@3 41 private long deviceID;
rlm@3 42
rlm@3 43 /**
rlm@3 44 * To ensure that <code>deviceID<code> and <code>listeners<code> are
rlm@3 45 * properly initialized before any additional listeners are added.
rlm@3 46 */
rlm@3 47 private CountDownLatch latch = new CountDownLatch(1);
rlm@3 48
rlm@3 49 private void waitForInit(){
rlm@3 50 try {latch.await();}
rlm@3 51 catch (InterruptedException e) {e.printStackTrace();}
rlm@3 52 }
rlm@3 53
rlm@3 54 /**
rlm@3 55 * Each listener (including the main LWJGL listener) can be registered
rlm@3 56 * with a <code>SoundProcessor</code>, which this Renderer will call whenever
rlm@3 57 * there is new audio data to be processed.
rlm@3 58 */
rlm@3 59 public HashMap<Listener, SoundProcessor> soundProcessorMap =
rlm@3 60 new HashMap<Listener, SoundProcessor>();
rlm@3 61
rlm@3 62
rlm@3 63 /**
rlm@3 64 * Create a new slave context on the recorder device which will render all the
rlm@3 65 * sounds in the main LWJGL context with respect to this listener.
rlm@3 66 */
rlm@3 67 public void addListener(Listener l) {
rlm@3 68 try {this.latch.await();}
rlm@3 69 catch (InterruptedException e) {e.printStackTrace();}
rlm@3 70 this.addListener();
rlm@3 71 this.listeners.add(l);
rlm@3 72 }
rlm@3 73
rlm@3 74 /**
rlm@3 75 * Whenever new data is rendered in the perspective of this listener,
rlm@3 76 * this Renderer will send that data to the SoundProcessor of your choosing.
rlm@3 77 */
rlm@3 78 public void registerSoundProcessor(Listener l, SoundProcessor sp) {
rlm@3 79 this.soundProcessorMap.put(l, sp);
rlm@3 80 }
rlm@3 81
rlm@3 82 /**
rlm@3 83 * Registers a SoundProcessor for the main LWJGL context. IF all you want to
rlm@3 84 * do is record the sound you would normally hear in your application, then
rlm@3 85 * this is the only method you have to worry about.
rlm@3 86 */
rlm@3 87 public void registerSoundProcessor(SoundProcessor sp){
rlm@3 88 // register a sound processor for the default listener.
rlm@3 89 this.soundProcessorMap.put(null, sp);
rlm@3 90 }
rlm@3 91
rlm@3 92 private static final Logger logger =
rlm@3 93 Logger.getLogger(AudioSend.class.getName());
rlm@3 94
rlm@3 95
rlm@3 96 //////////// Native Methods
rlm@3 97
rlm@3 98 /** This establishes the LWJGL context as the context which will be copies to all
rlm@3 99 * other contexts. It must be called before any calls to <code>addListener();</code>
rlm@3 100 */
rlm@3 101 public void initDevice(){
rlm@3 102 ninitDevice(this.deviceID);}
rlm@3 103 public static native void ninitDevice(long device);
rlm@3 104
rlm@3 105 /**
rlm@3 106 * The send device does not automatically process sound. This step function will cause
rlm@3 107 * the desired number of samples to be processed for each listener. The results will then
rlm@3 108 * be available via calls to <code>getSamples()</code> for each listener.
rlm@3 109 * @param samples
rlm@3 110 */
rlm@3 111 public void step(int samples){
rlm@3 112 nstep(this.deviceID, samples);}
rlm@3 113 public static native void nstep(long device, int samples);
rlm@3 114
rlm@3 115 /**
rlm@3 116 * Retrieve the final rendered sound for a particular listener. <code>contextNum == 0</code>
rlm@3 117 * is the main LWJGL context.
rlm@3 118 * @param buffer
rlm@3 119 * @param samples
rlm@3 120 * @param contextNum
rlm@3 121 */
rlm@3 122 public void getSamples(ByteBuffer buffer, int samples, int contextNum){
rlm@3 123 ngetSamples(this.deviceID, buffer, buffer.position(), samples, contextNum);}
rlm@3 124 public static native void ngetSamples(
rlm@3 125 long device, ByteBuffer buffer, int position, int samples, int contextNum);
rlm@3 126
rlm@3 127 /**
rlm@3 128 * Create an additional listener on the recorder device. The device itself will manage
rlm@3 129 * this listener and synchronize it with the main LWJGL context. Processed sound samples
rlm@3 130 * for this listener will be available via a call to <code>getSamples()</code> with
rlm@3 131 * <code>contextNum</code> equal to the number of times this method has been called.
rlm@3 132 */
rlm@3 133 public void addListener(){naddListener(this.deviceID);}
rlm@3 134 public static native void naddListener(long device);
rlm@3 135
rlm@3 136 /**
rlm@3 137 * This will internally call <code>alListener3f<code> in the appropriate slave context and update
rlm@3 138 * that context's listener's parameters. Calling this for a number greater than the current
rlm@3 139 * number of slave contexts will have no effect.
rlm@3 140 * @param pname
rlm@3 141 * @param v1
rlm@3 142 * @param v2
rlm@3 143 * @param v3
rlm@3 144 * @param contextNum
rlm@3 145 */
rlm@3 146 public void setNthListener3f(int pname, float v1, float v2, float v3, int contextNum){
rlm@3 147 nsetNthListener3f(pname, v1, v2, v3, this.deviceID, contextNum);}
rlm@3 148 public static native void
rlm@3 149 nsetNthListener3f(int pname, float v1, float v2, float v3, long device, int contextNum);
rlm@3 150
rlm@3 151 /**
rlm@3 152 * This will internally call <code>alListenerf<code> in the appropriate slave context and update
rlm@3 153 * that context's listener's parameters. Calling this for a number greater than the current
rlm@3 154 * number of slave contexts will have no effect.
rlm@3 155 * @param pname
rlm@3 156 * @param v1
rlm@3 157 * @param contextNum
rlm@3 158 */
rlm@3 159 public void setNthListenerf(int pname, float v1, int contextNum){
rlm@3 160 nsetNthListenerf(pname, v1, this.deviceID, contextNum);}
rlm@3 161 public static native void nsetNthListenerf(int pname, float v1, long device, int contextNum);
rlm@3 162
rlm@3 163 /**
rlm@3 164 * Instead of taking whatever device is available on the system, this call
rlm@3 165 * creates the "Multiple Audio Send" device, which supports multiple listeners in a limited
rlm@3 166 * capacity. For each listener, the device renders it not to the sound device, but
rlm@3 167 * instead to buffers which it makes available via JNI.
rlm@3 168 */
rlm@3 169 public void initInThread(){
rlm@3 170 try{
rlm@3 171 if (!AL.isCreated()){
rlm@3 172 AL.create("Multiple Audio Send", 44100, 60, false);
rlm@3 173 }
rlm@3 174 }catch (OpenALException ex){
rlm@3 175 logger.log(Level.SEVERE, "Failed to load audio library", ex);
rlm@3 176 System.exit(1);
rlm@3 177 return;
rlm@3 178 }catch (LWJGLException ex){
rlm@3 179 logger.log(Level.SEVERE, "Failed to load audio library", ex);
rlm@3 180 System.exit(1);
rlm@3 181 return;
rlm@3 182 }
rlm@3 183 super.initInThread();
rlm@3 184
rlm@3 185 ALCdevice device = AL.getDevice();
rlm@3 186
rlm@3 187 // RLM: use reflection to grab the ID of our device for use later.
rlm@3 188 try {
rlm@3 189 Field deviceIDField;
rlm@3 190 deviceIDField = ALCdevice.class.getDeclaredField("device");
rlm@3 191 deviceIDField.setAccessible(true);
rlm@3 192 try {deviceID = (Long)deviceIDField.get(device);}
rlm@3 193 catch (IllegalArgumentException e) {e.printStackTrace();}
rlm@3 194 catch (IllegalAccessException e) {e.printStackTrace();}
rlm@3 195 deviceIDField.setAccessible(false);}
rlm@3 196 catch (SecurityException e) {e.printStackTrace();}
rlm@3 197 catch (NoSuchFieldException e) {e.printStackTrace();}
rlm@3 198
rlm@3 199 // the LWJGL context must be established as the master context before
rlm@3 200 // any other listeners can be created on this device.
rlm@3 201 initDevice();
rlm@3 202 // Now, everything is initialized, and it is safe to add more listeners.
rlm@3 203 latch.countDown();
rlm@3 204 }
rlm@3 205
rlm@3 206
rlm@3 207 public void cleanup(){
rlm@3 208 for(SoundProcessor sp : this.soundProcessorMap.values()){
rlm@3 209 sp.cleanup();
rlm@3 210 }
rlm@3 211 super.cleanup();
rlm@3 212 }
rlm@3 213
rlm@3 214 public void updateAllListeners(){
rlm@3 215 for (int i = 0; i < this.listeners.size(); i++){
rlm@3 216 Listener lis = this.listeners.get(i);
rlm@3 217 if (null != lis){
rlm@3 218 Vector3f location = lis.getLocation();
rlm@3 219 Vector3f velocity = lis.getVelocity();
rlm@3 220 Vector3f orientation = lis.getUp();
rlm@3 221 float gain = lis.getVolume();
rlm@3 222 setNthListener3f(AL10.AL_POSITION,
rlm@3 223 location.x, location.y, location.z, i);
rlm@3 224 setNthListener3f(AL10.AL_VELOCITY,
rlm@3 225 velocity.x, velocity.y, velocity.z, i);
rlm@3 226 setNthListener3f(AL10.AL_ORIENTATION,
rlm@3 227 orientation.x, orientation.y, orientation.z, i);
rlm@3 228 setNthListenerf(AL10.AL_GAIN, gain, i);
rlm@3 229 }
rlm@3 230 }
rlm@3 231 }
rlm@3 232
rlm@3 233
rlm@3 234 public final static int BYTES_PER_SAMPLE = 4;
rlm@3 235 private ByteBuffer buffer = BufferUtils.createByteBuffer(4096);
rlm@3 236
rlm@3 237 public void dispatchAudio(float tpf){
rlm@3 238 int samplesToGet = (int) (tpf * 44100);
rlm@3 239 try {latch.await();}
rlm@3 240 catch (InterruptedException e) {e.printStackTrace();}
rlm@3 241 step(samplesToGet);
rlm@3 242 updateAllListeners();
rlm@3 243
rlm@3 244 for (int i = 0; i < this.listeners.size(); i++){
rlm@3 245 buffer.clear();
rlm@3 246 this.getSamples(buffer, samplesToGet, i);
rlm@3 247 SoundProcessor sp =
rlm@3 248 this.soundProcessorMap.get(this.listeners.get(i));
rlm@3 249 if (null != sp){sp.process(buffer, samplesToGet*BYTES_PER_SAMPLE);}
rlm@3 250 }
rlm@3 251
rlm@3 252 }
rlm@3 253
rlm@3 254 public void update(float tpf){
rlm@3 255 super.update(tpf);
rlm@3 256 dispatchAudio(tpf);
rlm@3 257 }
rlm@3 258
rlm@3 259 }
rlm@3 260