Merge "NEW_API: Unhide audio effect APIs." into gingerbread

9 files changed, 148 insertions, 173 deletions

diff --git a/media/java/android/media/AudioEffect.java b/media/java/android/media/AudioEffect.java
index 053cc22..aed29c3 100644
--- a/media/java/android/media/AudioEffect.java
+++ b/media/java/android/media/AudioEffect.java
@@ -42,8 +42,6 @@ import java.util.UUID;
  * <p>If the effect is to be applied to a specific AudioTrack or MediaPlayer instance,
  * the application must specify the audio session ID of that instance when calling the AudioEffect
  * constructor.
- *
- * { @hide Pending API council review }
  */
 public class AudioEffect {
     static {
@@ -107,15 +105,15 @@ public class AudioEffect {
     /**
      * Event id for engine state change notification.
      */
-    protected static final int NATIVE_EVENT_ENABLED_STATUS = 0;
+    public static final int NATIVE_EVENT_ENABLED_STATUS = 0;
     /**
      * Event id for engine control ownership change notification.
      */
-    protected static final int NATIVE_EVENT_CONTROL_STATUS = 1;
+    public static final int NATIVE_EVENT_CONTROL_STATUS = 1;
     /**
      * Event id for engine parameter change notification.
      */
-    protected static final int NATIVE_EVENT_PARAMETER_CHANGED = 2;
+    public static final int NATIVE_EVENT_PARAMETER_CHANGED = 2;
 
     /**
      * Successful operation.
@@ -203,15 +201,15 @@ public class AudioEffect {
     /**
      * Indicates the state of the AudioEffect instance
      */
-    protected int mState = STATE_UNINITIALIZED;
+    private int mState = STATE_UNINITIALIZED;
     /**
      * Lock to synchronize access to mState
      */
-    protected final Object mStateLock = new Object();
+    private final Object mStateLock = new Object();
     /**
      * System wide unique effect ID
      */
-    protected int mId;
+    private int mId;
 
     // accessed by native methods
     private int mNativeAudioEffect;
@@ -227,27 +225,27 @@ public class AudioEffect {
      *
      * @see #setEnableStatusListener(OnEnableStatusChangeListener)
      */
-    protected OnEnableStatusChangeListener mEnableStatusChangeListener = null;
+    private OnEnableStatusChangeListener mEnableStatusChangeListener = null;
     /**
      * Listener for effect engine control ownership change notifications.
      *
      * @see #setControlStatusListener(OnControlStatusChangeListener)
      */
-    protected OnControlStatusChangeListener mControlChangeStatusListener = null;
+    private OnControlStatusChangeListener mControlChangeStatusListener = null;
     /**
      * Listener for effect engine control ownership change notifications.
      *
      * @see #setParameterListener(OnParameterChangeListener)
      */
-    protected OnParameterChangeListener mParameterChangeListener = null;
+    private OnParameterChangeListener mParameterChangeListener = null;
     /**
      * Lock to protect listeners updates against event notifications
      */
-    protected final Object mListenerLock = new Object();
+    public final Object mListenerLock = new Object();
     /**
      * Handler for events coming from the native code
      */
-    protected NativeEventHandler mNativeEventHandler = null;
+    public NativeEventHandler mNativeEventHandler = null;
 
     // --------------------------------------------------------------------------
     // Constructor, Finalize
@@ -275,7 +273,7 @@ public class AudioEffect {
      *            how much the requesting application needs control of effect
      *            parameters. The normal priority is 0, above normal is a
      *            positive number, below normal a negative number.
-     * @param audioSession System wide unique audio session identifier. If audioSession
+     * @param audioSession system wide unique audio session identifier. If audioSession
      *            is not 0, the effect will be attached to the MediaPlayer or
      *            AudioTrack in the same audio session. Otherwise, the effect
      *            will apply to the output mix.
@@ -337,7 +335,7 @@ public class AudioEffect {
     /**
      * Get the effect descriptor.
      *
-     //TODO when AudioEffect class is unhidden @ see android.media.AudioEffect.Descriptor
+     * @see android.media.AudioEffect.Descriptor
      * @throws IllegalStateException
      */
     public Descriptor getDescriptor() throws IllegalStateException {
@@ -351,7 +349,7 @@ public class AudioEffect {
 
     /**
      * Query all effects available on the platform. Returns an array of
-     //TODO when AudioEffect class is unhidden: {@ link android.media.AudioEffect.Descriptor} objects
+     * {@link android.media.AudioEffect.Descriptor} objects
      *
      * @throws IllegalStateException
      */
@@ -967,7 +965,7 @@ public class AudioEffect {
     // Utility methods
     // ------------------
 
-    protected void checkState(String methodName) throws IllegalStateException {
+    public void checkState(String methodName) throws IllegalStateException {
         synchronized (mStateLock) {
             if (mState != STATE_INITIALIZED) {
                 throw (new IllegalStateException(methodName
@@ -976,7 +974,7 @@ public class AudioEffect {
         }
     }
 
-    protected void checkStatus(int status) {
+    public void checkStatus(int status) {
         switch (status) {
         case AudioEffect.SUCCESS:
             break;
@@ -991,37 +989,37 @@ public class AudioEffect {
         }
     }
 
-    protected int byteArrayToInt(byte[] valueBuf) {
+    public int byteArrayToInt(byte[] valueBuf) {
         return byteArrayToInt(valueBuf, 0);
 
     }
 
-    protected int byteArrayToInt(byte[] valueBuf, int offset) {
+    public int byteArrayToInt(byte[] valueBuf, int offset) {
         ByteBuffer converter = ByteBuffer.wrap(valueBuf);
         converter.order(ByteOrder.nativeOrder());
         return converter.getInt(offset);
 
     }
 
-    protected byte[] intToByteArray(int value) {
+    public byte[] intToByteArray(int value) {
         ByteBuffer converter = ByteBuffer.allocate(4);
         converter.order(ByteOrder.nativeOrder());
         converter.putInt(value);
         return converter.array();
     }
 
-    protected short byteArrayToShort(byte[] valueBuf) {
+    public short byteArrayToShort(byte[] valueBuf) {
         return byteArrayToShort(valueBuf, 0);
     }
 
-    protected short byteArrayToShort(byte[] valueBuf, int offset) {
+    public short byteArrayToShort(byte[] valueBuf, int offset) {
         ByteBuffer converter = ByteBuffer.wrap(valueBuf);
         converter.order(ByteOrder.nativeOrder());
         return converter.getShort(offset);
 
     }
 
-    protected byte[] shortToByteArray(short value) {
+    public byte[] shortToByteArray(short value) {
         ByteBuffer converter = ByteBuffer.allocate(2);
         converter.order(ByteOrder.nativeOrder());
         short sValue = (short) value;
@@ -1029,7 +1027,7 @@ public class AudioEffect {
         return converter.array();
     }
 
-    protected byte[] concatArrays(byte[]... arrays) {
+    public byte[] concatArrays(byte[]... arrays) {
         int len = 0;
         for (byte[] a : arrays) {
             len += a.length;
diff --git a/media/java/android/media/AudioTrack.java b/media/java/android/media/AudioTrack.java
index 6360541..7469133 100644
--- a/media/java/android/media/AudioTrack.java
+++ b/media/java/android/media/AudioTrack.java
@@ -298,8 +298,6 @@ public class AudioTrack
      * @param mode streaming or static buffer. See {@link #MODE_STATIC} and {@link #MODE_STREAM}
      * @param sessionId Id of audio session the AudioTrack must be attached to
      * @throws java.lang.IllegalArgumentException
-     // FIXME: unhide.
-     * @hide
      */
     public AudioTrack(int streamType, int sampleRateInHz, int channelConfig, int audioFormat,
             int bufferSizeInBytes, int mode, int sessionId)
@@ -648,9 +646,6 @@ public class AudioTrack
      * Returns the audio session ID.
      *
      * @return the ID of the audio session this AudioTrack belongs to.
-     // FIXME: unhide.
-     // FIXME: link to AudioEffect class when public.
-     * @hide
      */
     public int getAudioSessionId() {
         return mSessionId;
@@ -972,17 +967,14 @@ public class AudioTrack
      * reverberation effect which can be applied on any sound source that directs a certain
      * amount of its energy to this effect. This amount is defined by setAuxEffectSendLevel().
      * {@see #setAuxEffectSendLevel(float)}.
-     // TODO when AudioEffect are unhidden
-     * <p>After creating an auxiliary effect (e.g. {_at_link android.media.EnvironmentalReverb}),
-     * retrieve its ID with {_at_link android.media.AudioEffect#getId()} and use it when calling
+     * <p>After creating an auxiliary effect (e.g. {@link android.media.EnvironmentalReverb}),
+     * retrieve its ID with {@link android.media.AudioEffect#getId()} and use it when calling
      * this method to attach the audio track to the effect.
      * <p>To detach the effect from the audio track, call this method with a null effect id.
      *
      * @param effectId system wide unique id of the effect to attach
      * @return error code or success, see {@link #SUCCESS},
      *    {@link #ERROR_INVALID_OPERATION}, {@link #ERROR_BAD_VALUE}
-     // FIXME: unhide.
-     * @hide
      */
     public int attachAuxEffect(int effectId) {
         if (mState != STATE_INITIALIZED) {
@@ -1005,8 +997,6 @@ public class AudioTrack
      * @param level send level scalar
      * @return error code or success, see {@link #SUCCESS},
      *    {@link #ERROR_INVALID_OPERATION}
-     // FIXME: unhide.
-     * @hide
      */
     public int setAuxEffectSendLevel(float level) {
         if (mState != STATE_INITIALIZED) {
diff --git a/media/java/android/media/BassBoost.java b/media/java/android/media/BassBoost.java
index 75c2c88..73c1751 100644
--- a/media/java/android/media/BassBoost.java
+++ b/media/java/android/media/BassBoost.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 The Android Open Source Project
+ * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,10 +40,7 @@ import java.util.StringTokenizer;
  * <p>To attach the BassBoost to a particular AudioTrack or MediaPlayer, specify the audio session
  * ID of this AudioTrack or MediaPlayer when constructing the BassBoost. If the audio session ID 0
  * is specified, the BassBoost applies to the main audio output mix.
- // TODO when AudioEffect is unhidden
- // <p> See {_at_link android.media.AudioEffect} class for more details on controlling audio effects.
- *
- * {@hide Pending API council review}
+ * <p> See {@link android.media.AudioEffect} class for more details on controlling audio effects.
  */
 
 public class BassBoost extends AudioEffect {
@@ -88,7 +85,7 @@ public class BassBoost extends AudioEffect {
      * engine. As the same engine can be shared by several applications, this parameter indicates
      * how much the requesting application needs control of effect parameters. The normal priority
      * is 0, above normal is a positive number, below normal a negative number.
-     * @param audioSession  System wide unique audio session identifier. If audioSession
+     * @param audioSession system wide unique audio session identifier. If audioSession
      *  is not 0, the BassBoost will be attached to the MediaPlayer or AudioTrack in the
      *  same audio session. Otherwise, the BassBoost will apply to the output mix.
      *
@@ -121,7 +118,7 @@ public class BassBoost extends AudioEffect {
      * accuracy for setting the strength, it is allowed to round the given strength to the nearest
      * supported value. You can use the {@link #getRoundedStrength()} method to query the
      * (possibly rounded) value that was actually set.
-     * @param strength Strength of the effect. The valid range for strength strength is [0, 1000],
+     * @param strength strength of the effect. The valid range for strength strength is [0, 1000],
      * where 0 per mille designates the mildest effect and 1000 per mille designates the strongest.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
@@ -134,7 +131,7 @@ public class BassBoost extends AudioEffect {
 
     /**
      * Gets the current strength of the effect.
-     * @return The strength of the effect. The valid range for strength is [0, 1000], where 0 per
+     * @return the strength of the effect. The valid range for strength is [0, 1000], where 0 per
      * mille designates the mildest effect and 1000 per mille the strongest
      * @throws IllegalStateException
      * @throws IllegalArgumentException
@@ -158,8 +155,7 @@ public class BassBoost extends AudioEffect {
          * BassBoost engine.
          * @param effect the BassBoost on which the interface is registered.
          * @param status status of the set parameter operation.
-         // TODO when AudioEffect is unhidden
-         // See {_at_link android.media.AudioEffect#setParameter(byte[], byte[])}.
+         * See {@link android.media.AudioEffect#setParameter(byte[], byte[])}.
          * @param param ID of the modified parameter. See {@link #PARAM_STRENGTH} ...
          * @param value the new parameter value.
          */
@@ -282,6 +278,7 @@ public class BassBoost extends AudioEffect {
     /**
      * Sets the bass boost properties. This method is useful when bass boost settings have to
      * be applied from a previous backup.
+     * @param settings a BassBoost.Settings object containing the properties to apply
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
diff --git a/media/java/android/media/EnvironmentalReverb.java b/media/java/android/media/EnvironmentalReverb.java
index 3cc8452..b50febc 100644
--- a/media/java/android/media/EnvironmentalReverb.java
+++ b/media/java/android/media/EnvironmentalReverb.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 The Android Open Source Project
+ * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,8 +39,7 @@ import java.util.StringTokenizer;
  * The EnvironmentalReverb class allows an application to control each reverb engine property in a
  * global reverb environment and is more suitable for games. For basic control, more suitable for
  * music applications, it is recommended to use the
- // TODO when PresetReverb is unhidden
- // {_at_link android.media.PresetReverb} class.
+ * {@link android.media.PresetReverb} class.
  * <p>An application creates a EnvironmentalReverb object to instantiate and control a reverb engine
  * in the audio framework.
  * <p>The methods, parameter types and units exposed by the EnvironmentalReverb implementation are
@@ -52,11 +51,8 @@ import java.util.StringTokenizer;
  * they must be explicitely attached to it and a send level must be specified. Use the effect ID
  * returned by getId() method to designate this particular effect when attaching it to the
  * MediaPlayer or AudioTrack.
- // TODO when AudioEffect is unhidden
- // <p> See {_at_link android.media.AudioEffect} class for more details on controlling
+ * <p> See {@link android.media.AudioEffect} class for more details on controlling
  * audio effects.
- *
- * {@hide Pending API council review}
  */
 
 public class EnvironmentalReverb extends AudioEffect {
@@ -67,8 +63,7 @@ public class EnvironmentalReverb extends AudioEffect {
     // frameworks/base/include/media/EffectEnvironmentalReverbApi.h
 
     /**
-     * Room level. Parameter ID for
-     * {@link android.media.EnvironmentalReverb.OnParameterChangeListener}
+     * Room level. Parameter ID for OnParameterChangeListener
      */
     public static final int PARAM_ROOM_LEVEL = 0;
     /**
@@ -80,7 +75,8 @@ public class EnvironmentalReverb extends AudioEffect {
      */
     public static final int PARAM_DECAY_TIME = 2;
     /**
-     * Decay HF ratio. Parameter ID for OnParameterChangeListener
+     * Decay HF ratio. Parameter ID for
+     * {@link android.media.EnvironmentalReverb.OnParameterChangeListener}
      */
     public static final int PARAM_DECAY_HF_RATIO = 3;
     /**
@@ -133,7 +129,7 @@ public class EnvironmentalReverb extends AudioEffect {
      * EnvironmentalReverb engine. As the same engine can be shared by several applications, this
      * parameter indicates how much the requesting application needs control of effect parameters.
      * The normal priority is 0, above normal is a positive number, below normal a negative number.
-     * @param audioSession  System wide unique audio session identifier. If audioSession
+     * @param audioSession  system wide unique audio session identifier. If audioSession
      *  is not 0, the EnvironmentalReverb will be attached to the MediaPlayer or AudioTrack in the
      *  same audio session. Otherwise, the EnvironmentalReverb will apply to the output mix.
      *  As the EnvironmentalReverb is an auxiliary effect it is recommended to instantiate it on
@@ -150,7 +146,7 @@ public class EnvironmentalReverb extends AudioEffect {
 
     /**
      * Sets the master volume level of the environmental reverb effect.
-     * @param room Room level in millibels. The valid range is [-9000, 0].
+     * @param room room level in millibels. The valid range is [-9000, 0].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -179,7 +175,7 @@ public class EnvironmentalReverb extends AudioEffect {
      * Sets the volume level at 5 kHz relative to the volume level at low frequencies of the
      * overall reverb effect.
      * <p>This controls a low-pass filter that will reduce the level of the high-frequency.
-     * @param roomHF High frequency attenuation level in millibels. The valid range is [-9000, 0].
+     * @param roomHF high frequency attenuation level in millibels. The valid range is [-9000, 0].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -206,7 +202,7 @@ public class EnvironmentalReverb extends AudioEffect {
 
     /**
      * Sets the time taken for the level of reverberation to decay by 60 dB.
-     * @param decayTime Decay time in milliseconds. The valid range is [100, 20000].
+     * @param decayTime decay time in milliseconds. The valid range is [100, 20000].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -234,7 +230,7 @@ public class EnvironmentalReverb extends AudioEffect {
     /**
      * Sets the ratio of high frequency decay time (at 5 kHz) relative to the decay time at low
      * frequencies.
-     * @param decayHFRatio High frequency decay ratio using a permille scale. The valid range is
+     * @param decayHFRatio high frequency decay ratio using a permille scale. The valid range is
      * [100, 2000]. A ratio of 1000 indicates that all frequencies decay at the same rate.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
@@ -264,7 +260,7 @@ public class EnvironmentalReverb extends AudioEffect {
      * Sets the volume level of the early reflections.
      * <p>This level is combined with the overall room level
      * (set using {@link #setRoomLevel(short)}).
-     * @param reflectionsLevel Reflection level in millibels. The valid range is [-9000, 1000].
+     * @param reflectionsLevel reflection level in millibels. The valid range is [-9000, 1000].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -293,7 +289,7 @@ public class EnvironmentalReverb extends AudioEffect {
      * Sets the delay time for the early reflections.
      * <p>This method sets the time between when the direct path is heard and when the first
      * reflection is heard.
-     * @param reflectionsDelay Reflections delay in milliseconds. The valid range is [0, 300].
+     * @param reflectionsDelay reflections delay in milliseconds. The valid range is [0, 300].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -321,7 +317,7 @@ public class EnvironmentalReverb extends AudioEffect {
     /**
      * Sets the volume level of the late reverberation.
      * <p>This level is combined with the overall room level (set using {@link #setRoomLevel(short)}).
-     * @param reverbLevel Reverb level in millibels. The valid range is [-9000, 2000].
+     * @param reverbLevel reverb level in millibels. The valid range is [-9000, 2000].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -348,7 +344,7 @@ public class EnvironmentalReverb extends AudioEffect {
 
     /**
      * Sets the time between the first reflection and the reverberation.
-     * @param reverbDelay Reverb delay in milliseconds. The valid range is [0, 100].
+     * @param reverbDelay reverb delay in milliseconds. The valid range is [0, 100].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -376,7 +372,7 @@ public class EnvironmentalReverb extends AudioEffect {
     /**
      * Sets the echo density in the late reverberation decay.
      * <p>The scale should approximately map linearly to the perceived change in reverberation.
-     * @param diffusion Diffusion specified using a permille scale. The diffusion valid range is
+     * @param diffusion diffusion specified using a permille scale. The diffusion valid range is
      * [0, 1000]. A value of 1000 o/oo indicates a smooth reverberation decay.
      * Values below this level give a more <i>grainy</i> character.
      * @throws IllegalStateException
@@ -409,7 +405,7 @@ public class EnvironmentalReverb extends AudioEffect {
      * <p> The scale should approximately map linearly to the perceived change in reverberation.
      * A lower density creates a hollow sound that is useful for simulating small reverberation
      * spaces such as bathrooms.
-     * @param density Density specified using a permille scale. The valid range is [0, 1000].
+     * @param density density specified using a permille scale. The valid range is [0, 1000].
      * A value of 1000 o/oo indicates a natural sounding reverberation. Values below this level
      * produce a more colored effect.
      * @throws IllegalStateException
@@ -448,8 +444,7 @@ public class EnvironmentalReverb extends AudioEffect {
          * EnvironmentalReverb engine.
          * @param effect the EnvironmentalReverb on which the interface is registered.
          * @param status status of the set parameter operation.
-         // TODO when AudioEffect is unhidden
-         // See {_at_link android.media.AudioEffect#setParameter(byte[], byte[])}.
+         * See {@link android.media.AudioEffect#setParameter(byte[], byte[])}.
          * @param param ID of the modified parameter. See {@link #PARAM_ROOM_LEVEL} ...
          * @param value the new parameter value.
          */
@@ -649,6 +644,7 @@ public class EnvironmentalReverb extends AudioEffect {
     /**
      * Sets the environmental reverb properties. This method is useful when reverb settings have to
      * be applied from a previous backup.
+     * @param settings a EnvironmentalReverb.Settings object containing the properties to apply
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
diff --git a/media/java/android/media/Equalizer.java b/media/java/android/media/Equalizer.java
index b062b64..6fa48c5 100644
--- a/media/java/android/media/Equalizer.java
+++ b/media/java/android/media/Equalizer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 The Android Open Source Project
+ * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,10 +41,7 @@ import java.util.StringTokenizer;
  * <p>To attach the Equalizer to a particular AudioTrack or MediaPlayer, specify the audio session
  * ID of this AudioTrack or MediaPlayer when constructing the Equalizer. If the audio session ID 0
  * is specified, the Equalizer applies to the main audio output mix.
- // TODO when AudioEffect is unhidden
- // <p> See {_at_link android.media.AudioEffect} class for more details on controlling audio effects.
- *
- * {@hide Pending API council review}
+ * <p> See {@link android.media.AudioEffect} class for more details on controlling audio effects.
  */
 
 public class Equalizer extends AudioEffect {
@@ -54,7 +51,7 @@ public class Equalizer extends AudioEffect {
     // These constants must be synchronized with those in
     // frameworks/base/include/media/EffectEqualizerApi.h
     /**
-     * Number of bands. Parameter ID for {@link android.media.Equalizer.OnParameterChangeListener}
+     * Number of bands. Parameter ID for OnParameterChangeListener
      */
     public static final int PARAM_NUM_BANDS = 0;
     /**
@@ -70,11 +67,13 @@ public class Equalizer extends AudioEffect {
      */
     public static final int PARAM_CENTER_FREQ = 3;
     /**
-     * Band frequency range. Parameter ID for OnParameterChangeListener
+     * Band frequency range. Parameter ID for
+     * {@link android.media.Equalizer.OnParameterChangeListener}
      */
     public static final int PARAM_BAND_FREQ_RANGE = 4;
     /**
      * Band for a given frequency. Parameter ID for OnParameterChangeListener
+     *
      */
     public static final int PARAM_GET_BAND = 5;
     /**
@@ -92,7 +91,7 @@ public class Equalizer extends AudioEffect {
     // used by setProperties()/getProperties
     private static final int PARAM_PROPERTIES = 9;
     /**
-     * maximum size for perset name
+     * Maximum size for preset name
      */
     public static final int PARAM_STRING_SIZE_MAX = 32;
 
@@ -131,7 +130,7 @@ public class Equalizer extends AudioEffect {
      * engine. As the same engine can be shared by several applications, this parameter indicates
      * how much the requesting application needs control of effect parameters. The normal priority
      * is 0, above normal is a positive number, below normal a negative number.
-     * @param audioSession  System wide unique audio session identifier. If audioSession
+     * @param audioSession  system wide unique audio session identifier. If audioSession
      *  is not 0, the Equalizer will be attached to the MediaPlayer or AudioTrack in the
      *  same audio session. Otherwise, the Equalizer will apply to the output mix.
      *
@@ -189,7 +188,7 @@ public class Equalizer extends AudioEffect {
     }
 
     /**
-     * Gets the level range for use by {@link #setBandLevel(int,short)}. The level is expressed in
+     * Gets the level range for use by {@link #setBandLevel(short,short)}. The level is expressed in
      * milliBel.
      * @return the band level range in an array of short integers. The first element is the lower
      * limit of the range, the second element the upper limit.
@@ -206,13 +205,14 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Sets the given equalizer band to the given gain value.
-     * @param band Frequency band that will have the new gain. The numbering of the bands starts
-     * from 0 and ends at (number of bands - 1). See @see #getNumberOfBands().
-     * @param level New gain in millibels that will be set to the given band. getBandLevelRange()
+     * @param band frequency band that will have the new gain. The numbering of the bands starts
+     * from 0 and ends at (number of bands - 1).
+     * @param level new gain in millibels that will be set to the given band. getBandLevelRange()
      * will define the maximum and minimum values.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
+     * @see #getNumberOfBands()
      */
     public void setBandLevel(short band, short level)
     throws IllegalStateException, IllegalArgumentException, UnsupportedOperationException {
@@ -227,9 +227,9 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Gets the gain set for the given equalizer band.
-     * @param band Frequency band whose gain is requested. The numbering of the bands starts
+     * @param band frequency band whose gain is requested. The numbering of the bands starts
      * from 0 and ends at (number of bands - 1).
-     * @return Gain in millibels of the given band.
+     * @return the gain in millibels of the given band.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -249,9 +249,9 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Gets the center frequency of the given band.
-     * @param band Frequency band whose center frequency is requested. The numbering of the bands
+     * @param band frequency band whose center frequency is requested. The numbering of the bands
      * starts from 0 and ends at (number of bands - 1).
-     * @return The center frequency in milliHertz
+     * @return the center frequency in milliHertz
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -270,9 +270,9 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Gets the frequency range of the given frequency band.
-     * @param band Frequency band whose frequency range is requested. The numbering of the bands
+     * @param band frequency band whose frequency range is requested. The numbering of the bands
      * starts from 0 and ends at (number of bands - 1).
-     * @return The frequency range in millHertz in an array of integers. The first element is the
+     * @return the frequency range in millHertz in an array of integers. The first element is the
      * lower limit of the range, the second element the upper limit.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
@@ -291,8 +291,8 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Gets the band that has the most effect on the given frequency.
-     * @param frequency Frequency in milliHertz which is to be equalized via the returned band.
-     * @return Frequency band that has most effect on the given frequency.
+     * @param frequency frequency in milliHertz which is to be equalized via the returned band.
+     * @return the frequency band that has most effect on the given frequency.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -311,7 +311,7 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Gets current preset.
-     * @return Preset that is set at the moment.
+     * @return the preset that is set at the moment.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -325,11 +325,12 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Sets the equalizer according to the given preset.
-     * @param preset New preset that will be taken into use. The valid range is [0,
-     * number of presets-1]. See {@see #getNumberOfPresets()}.
+     * @param preset new preset that will be taken into use. The valid range is [0,
+     * number of presets-1].
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
+     * @see #getNumberOfPresets()
      */
     public void usePreset(short preset)
     throws IllegalStateException, IllegalArgumentException, UnsupportedOperationException {
@@ -339,7 +340,7 @@ public class Equalizer extends AudioEffect {
     /**
      * Gets the total number of presets the equalizer supports. The presets will have indices
      * [0, number of presets-1].
-     * @return The number of presets the equalizer supports.
+     * @return the number of presets the equalizer supports.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -353,8 +354,8 @@ public class Equalizer extends AudioEffect {
 
     /**
      * Gets the preset name based on the index.
-     * @param preset Index of the preset. The valid range is [0, number of presets-1].
-     * @return A string containing the name of the given preset.
+     * @param preset index of the preset. The valid range is [0, number of presets-1].
+     * @return a string containing the name of the given preset.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -379,8 +380,7 @@ public class Equalizer extends AudioEffect {
          * Equalizer engine.
          * @param effect the Equalizer on which the interface is registered.
          * @param status status of the set parameter operation.
-         // TODO when AudioEffect is unhidden
-         // See {_at_link android.media.AudioEffect#setParameter(byte[], byte[])}.
+         * See {@link android.media.AudioEffect#setParameter(byte[], byte[])}.
          * @param param1 ID of the modified parameter. See {@link #PARAM_BAND_LEVEL} ...
          * @param param2 additional parameter qualifier (e.g the band for band level parameter).
          * @param value the new parameter value.
@@ -539,6 +539,7 @@ public class Equalizer extends AudioEffect {
     /**
      * Sets the equalizer properties. This method is useful when equalizer settings have to
      * be applied from a previous backup.
+     * @param settings an Equalizer.Settings object containing the properties to apply
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
diff --git a/media/java/android/media/MediaPlayer.java b/media/java/android/media/MediaPlayer.java
index e1f95b2..b8403e1 100644
--- a/media/java/android/media/MediaPlayer.java
+++ b/media/java/android/media/MediaPlayer.java
@@ -273,6 +273,16 @@ import java.lang.ref.WeakReference;
  *     <td>Valid Sates </p></td>
  *     <td>Invalid States </p></td>
  *     <td>Comments </p></td></tr>
+ * <tr><td>attachAuxEffect </p></td>
+ *     <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted} </p></td>
+ *     <td>{Idle, Error} </p></td>
+ *     <td>This method must be called after setDataSource.
+ *     Calling it does not change the object state. </p></td></tr>
+ * <tr><td>getAudioSessionId </p></td>
+ *     <td>any </p></td>
+ *     <td>{} </p></td>
+ *     <td>This method can be called in any state and calling it does not change
+ *         the object state. </p></td></tr>
  * <tr><td>getCurrentPosition </p></td>
  *     <td>{Idle, Initialized, Prepared, Started, Paused, Stopped,
  *         PlaybackCompleted} </p></td>
@@ -340,6 +350,12 @@ import java.lang.ref.WeakReference;
  *     <td>Successful invoke of this method in a valid state does not change
  *         the state. Calling this method in an invalid state transfers the
  *         object to the <em>Error</em> state. </p></td></tr>
+ * <tr><td>setAudioSessionId </p></td>
+ *     <td>{Idle} </p></td>
+ *     <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted,
+ *          Error} </p></td>
+ *     <td>This method must be called in idle state as the audio session ID must be known before
+ *         calling setDataSource. Calling it does not change the object state. </p></td></tr>
  * <tr><td>setAudioStreamType </p></td>
  *     <td>{Idle, Initialized, Stopped, Prepared, Started, Paused,
  *          PlaybackCompleted}</p></td>
@@ -347,6 +363,10 @@ import java.lang.ref.WeakReference;
  *     <td>Successful invoke of this method does not change the state. In order for the
  *         target audio stream type to become effective, this method must be called before
  *         prepare() or prepareAsync().</p></td></tr>
+ * <tr><td>setAuxEffectSendLevel </p></td>
+ *     <td>any</p></td>
+ *     <td>{} </p></td>
+ *     <td>Calling this method does not change the object state. </p></td></tr>
  * <tr><td>setDataSource </p></td>
  *     <td>{Idle} </p></td>
  *     <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted,
@@ -423,26 +443,6 @@ import java.lang.ref.WeakReference;
  *     <td>Successful invoke of this method in a valid state transfers the
  *         object to the <em>Stopped</em> state. Calling this method in an
  *         invalid state transfers the object to the <em>Error</em> state.</p></td></tr>
- * <tr><td>setAudioSessionId </p></td>
- *     <td>{Idle} </p></td>
- *     <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted,
- *          Error} </p></td>
- *     <td>This method must be called in idle state as the audio session ID must be known before
- *         calling setDataSource. Calling it does not change the object state. </p></td></tr>
- * <tr><td>getAudioSessionId </p></td>
- *     <td>any </p></td>
- *     <td>{} </p></td>
- *     <td>This method can be called in any state and calling it does not change
- *         the object state. </p></td></tr>
- * <tr><td>attachAuxEffect </p></td>
- *     <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted} </p></td>
- *     <td>{Idle, Error} </p></td>
- *     <td>This method must be called after setDataSource.
- *     Calling it does not change the object state. </p></td></tr>
- * <tr><td>setAuxEffectSendLevel </p></td>
- *     <td>any</p></td>
- *     <td>{} </p></td>
- *     <td>Calling this method does not change the object state. </p></td></tr>
  *
  * </table>
  *
@@ -1182,7 +1182,7 @@ public class MediaPlayer
     /**
      * Sets the audio session ID.
      *
-     * @param sessionId: the audio session ID.
+     * @param sessionId the audio session ID.
      * The audio session ID is a system wide unique identifier for the audio stream played by
      * this MediaPlayer instance.
      * The primary use of the audio session ID  is to associate audio effects to a particular
@@ -1194,20 +1194,14 @@ public class MediaPlayer
      * by calling this method.
      * This method must be called before one of the overloaded <code> setDataSource </code> methods.
      * @throws IllegalStateException if it is called in an invalid state
-     *
-     // FIXME: unhide.
-     // TODO when AudioEffect is unhidden
-     * @hide
      */
     public native void setAudioSessionId(int sessionId)  throws IllegalArgumentException, IllegalStateException;
 
     /**
      * Returns the audio session ID.
      *
-     * @return the audio session ID. {@see #setAudioSessionId(int)}.
+     * @return the audio session ID. {@see #setAudioSessionId(int)}
      * Note that the audio session ID is 0 only if a problem occured when the MediaPlayer was contructed.
-     // FIXME: unhide.
-     * @hide
      */
     public native int getAudioSessionId();
 
@@ -1217,16 +1211,13 @@ public class MediaPlayer
      * energy to this effect. This amount is defined by setAuxEffectSendLevel().
      * {@see #setAuxEffectSendLevel(float)}.
      // TODO when AudioEffect is unhidden
-     * <p>After creating an auxiliary effect (e.g. {_at_link android.media.EnvironmentalReverb}),
-     * retrieve its ID with {_at_link android.media.AudioEffect#getId()} and use it when calling
+     * <p>After creating an auxiliary effect (e.g. {@link android.media.EnvironmentalReverb}),
+     * retrieve its ID with {@link android.media.AudioEffect#getId()} and use it when calling
      * this method to attach the player to the effect.
      * <p>To detach the effect from the player, call this method with a null effect id.
      * <p>This method must be called after one of the overloaded <code> setDataSource </code>
      * methods.
-     *
      * @param effectId system wide unique id of the effect to attach
-     // FIXME: unhide.
-     * @hide
      */
     public native void attachAuxEffect(int effectId);
 
@@ -1241,8 +1232,6 @@ public class MediaPlayer
      * x == 0 -> level = 0
      * 0 < x <= R -> level = 10^(72*(x-R)/20/R)
      * @param level send level scalar
-     // FIXME: unhide.
-     * @hide
      */
     public native void setAuxEffectSendLevel(float level);
 
@@ -1676,8 +1665,4 @@ public class MediaPlayer
 
     private OnInfoListener mOnInfoListener;
 
-    /**
-     * @hide
-     */
-    public native static int snoop(short [] outData, int kind);
 }
diff --git a/media/java/android/media/PresetReverb.java b/media/java/android/media/PresetReverb.java
index c7d7037..1ec36fc 100644
--- a/media/java/android/media/PresetReverb.java
+++ b/media/java/android/media/PresetReverb.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 The Android Open Source Project
+ * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,8 +40,7 @@ import java.util.StringTokenizer;
  * The PresetReverb class allows an application to configure the global reverb using a reverb preset.
  * This is primarily used for adding some reverb in a music playback context. Applications
  * requiring control over a more advanced environmental reverb are advised to use the
- // TODO when EnvironmentalReverb is unhidden
- // {_at_link android.media.EnvironmentalReverb} class.
+ * {@link android.media.EnvironmentalReverb} class.
  * <p>An application creates a PresetReverb object to instantiate and control a reverb engine in the
  * audio framework.
  * <p>The methods, parameter types and units exposed by the PresetReverb implementation are
@@ -53,10 +52,7 @@ import java.util.StringTokenizer;
  * they must be explicitely attached to it and a send level must be specified. Use the effect ID
  * returned by getId() method to designate this particular effect when attaching it to the
  * MediaPlayer or AudioTrack.
- // TODO when AudioEffect is unhidden
- // <p> See {_at_link android.media.AudioEffect} class for more details on controlling audio effects.
- *
- * {@hide Pending API council review}
+ * <p> See {@link android.media.AudioEffect} class for more details on controlling audio effects.
  */
 
 public class PresetReverb extends AudioEffect {
@@ -73,15 +69,32 @@ public class PresetReverb extends AudioEffect {
     public static final int PARAM_PRESET = 0;
 
     /**
-     * Room level. Parameter ID for
-     * {@link android.media.PresetReverb.OnParameterChangeListener}
+     * No reverb or reflections
      */
     public static final int PRESET_NONE        = 0;
+    /**
+     * Reverb preset representing a small room less than five meters in length
+     */
     public static final int PRESET_SMALLROOM   = 1;
+    /**
+     * Reverb preset representing a medium room with a length of ten meters or less
+     */
     public static final int PRESET_MEDIUMROOM  = 2;
+    /**
+     * Reverb preset representing a large-sized room suitable for live performances
+     */
     public static final int PRESET_LARGEROOM   = 3;
+    /**
+     * Reverb preset representing a medium-sized hall
+     */
     public static final int PRESET_MEDIUMHALL  = 4;
+    /**
+     * Reverb preset representing a large-sized hall suitable for a full orchestra
+     */
     public static final int PRESET_LARGEHALL   = 5;
+    /**
+     * Reverb preset representing a synthesis of the traditional plate reverb
+     */
     public static final int PRESET_PLATE       = 6;
 
     /**
@@ -105,7 +118,7 @@ public class PresetReverb extends AudioEffect {
      * PresetReverb engine. As the same engine can be shared by several applications, this
      * parameter indicates how much the requesting application needs control of effect parameters.
      * The normal priority is 0, above normal is a positive number, below normal a negative number.
-     * @param audioSession  System wide unique audio session identifier. If audioSession
+     * @param audioSession  system wide unique audio session identifier. If audioSession
      *  is not 0, the PresetReverb will be attached to the MediaPlayer or AudioTrack in the
      *  same audio session. Otherwise, the PresetReverb will apply to the output mix.
      *  As the PresetReverb is an auxiliary effect it is recommended to instantiate it on
@@ -125,7 +138,7 @@ public class PresetReverb extends AudioEffect {
      *  <p>The reverb PRESET_NONE disables any reverb from the current output but does not free the
      *  resources associated with the reverb. For an application to signal to the implementation
      *  to free the resources, it must call the release() method.
-     * @param preset This must be one of the the preset constants defined in this class.
+     * @param preset this must be one of the the preset constants defined in this class.
      * e.g. {@link #PRESET_SMALLROOM}
      * @throws IllegalStateException
      * @throws IllegalArgumentException
@@ -138,7 +151,7 @@ public class PresetReverb extends AudioEffect {
 
     /**
      * Gets current reverb preset.
-     * @return Preset that is set at the moment.
+     * @return the preset that is set at the moment.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
@@ -161,8 +174,7 @@ public class PresetReverb extends AudioEffect {
          * PresetReverb engine.
          * @param effect the PresetReverb on which the interface is registered.
          * @param status status of the set parameter operation.
-         // TODO when AudioEffect is unhidden
-         // See {_at_link android.media.AudioEffect#setParameter(byte[], byte[])}.
+         * See {@link android.media.AudioEffect#setParameter(byte[], byte[])}.
          * @param param ID of the modified parameter. See {@link #PARAM_PRESET} ...
          * @param value the new parameter value.
          */
@@ -285,6 +297,7 @@ public class PresetReverb extends AudioEffect {
     /**
      * Sets the preset reverb properties. This method is useful when preset reverb settings have to
      * be applied from a previous backup.
+     * @param settings a PresetReverb.Settings object containing the properties to apply
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
diff --git a/media/java/android/media/Virtualizer.java b/media/java/android/media/Virtualizer.java
index 2c8909e..d03c2a8 100644
--- a/media/java/android/media/Virtualizer.java
+++ b/media/java/android/media/Virtualizer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 The Android Open Source Project
+ * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,10 +42,7 @@ import java.util.StringTokenizer;
  * <p>To attach the Virtualizer to a particular AudioTrack or MediaPlayer, specify the audio session
  * ID of this AudioTrack or MediaPlayer when constructing the Virtualizer. If the audio session ID 0
  * is specified, the Virtualizer applies to the main audio output mix.
- // TODO when AudioEffect is unhidden
- // <p> See {_at_link android.media.AudioEffect} class for more details on controlling audio effects.
- *
- * {@hide Pending API council review}
+ * <p> See {@link android.media.AudioEffect} class for more details on controlling audio effects.
  */
 
 public class Virtualizer extends AudioEffect {
@@ -89,7 +86,7 @@ public class Virtualizer extends AudioEffect {
      * engine. As the same engine can be shared by several applications, this parameter indicates
      * how much the requesting application needs control of effect parameters. The normal priority
      * is 0, above normal is a positive number, below normal a negative number.
-     * @param audioSession  System wide unique audio session identifier. If audioSession
+     * @param audioSession  system wide unique audio session identifier. If audioSession
      *  is not 0, the Virtualizer will be attached to the MediaPlayer or AudioTrack in the
      *  same audio session. Otherwise, the Virtualizer will apply to the output mix.
      *
@@ -122,7 +119,7 @@ public class Virtualizer extends AudioEffect {
      * accuracy for setting the strength, it is allowed to round the given strength to the nearest
      * supported value. You can use the {@link #getRoundedStrength()} method to query the
      * (possibly rounded) value that was actually set.
-     * @param strength Strength of the effect. The valid range for strength strength is [0, 1000],
+     * @param strength strength of the effect. The valid range for strength strength is [0, 1000],
      * where 0 per mille designates the mildest effect and 1000 per mille designates the strongest.
      * @throws IllegalStateException
      * @throws IllegalArgumentException
@@ -135,7 +132,7 @@ public class Virtualizer extends AudioEffect {
 
     /**
      * Gets the current strength of the effect.
-     * @return The strength of the effect. The valid range for strength is [0, 1000], where 0 per
+     * @return the strength of the effect. The valid range for strength is [0, 1000], where 0 per
      * mille designates the mildest effect and 1000 per mille the strongest
      * @throws IllegalStateException
      * @throws IllegalArgumentException
@@ -159,8 +156,7 @@ public class Virtualizer extends AudioEffect {
          * Virtualizer engine.
          * @param effect the Virtualizer on which the interface is registered.
          * @param status status of the set parameter operation.
-         // TODO when AudioEffect is unhidden
-         // See {_at_link android.media.AudioEffect#setParameter(byte[], byte[])}.
+         * See {@link android.media.AudioEffect#setParameter(byte[], byte[])}.
          * @param param ID of the modified parameter. See {@link #PARAM_STRENGTH} ...
          * @param value the new parameter value.
          */
@@ -283,6 +279,7 @@ public class Virtualizer extends AudioEffect {
     /**
      * Sets the virtualizer properties. This method is useful when virtualizer settings have to
      * be applied from a previous backup.
+     * @param settings a Virtualizer.Settings object containing the properties to apply
      * @throws IllegalStateException
      * @throws IllegalArgumentException
      * @throws UnsupportedOperationException
diff --git a/media/java/android/media/Visualizer.java b/media/java/android/media/Visualizer.java
index cdd3cdf..453fc04 100755
--- a/media/java/android/media/Visualizer.java
+++ b/media/java/android/media/Visualizer.java
@@ -57,8 +57,6 @@ import android.os.Message;
  * When data capture is not needed any more, the Visualizer should be disabled.
  * <p>It is good practice to call the {@link #release()} method when the Visualizer is not used
  * anymore to free up native resources associated to the Visualizer instance.
- *
- * {@hide Pending API council review}
  */
 
 public class Visualizer {
@@ -84,8 +82,8 @@ public class Visualizer {
     public static final int STATE_ENABLED   = 2;
 
     // to keep in sync with frameworks/base/media/jni/audioeffect/android_media_Visualizer.cpp
-    protected static final int NATIVE_EVENT_PCM_CAPTURE = 0;
-    protected static final int NATIVE_EVENT_FFT_CAPTURE = 1;
+    private static final int NATIVE_EVENT_PCM_CAPTURE = 0;
+    private static final int NATIVE_EVENT_FFT_CAPTURE = 1;
 
     // Error codes:
     /**
@@ -127,28 +125,28 @@ public class Visualizer {
     /**
      * Indicates the state of the Visualizer instance
      */
-    protected int mState = STATE_UNINITIALIZED;
+    private int mState = STATE_UNINITIALIZED;
     /**
      * Lock to synchronize access to mState
      */
-    protected final Object mStateLock = new Object();
+    private final Object mStateLock = new Object();
     /**
      * System wide unique Identifier of the visualizer engine used by this Visualizer instance
      */
-    protected int mId;
+    private int mId;
 
     /**
      * Lock to protect listeners updates against event notifications
      */
-    protected final Object mListenerLock = new Object();
+    private final Object mListenerLock = new Object();
     /**
      * Handler for events coming from the native code
      */
-    protected NativeEventHandler mNativeEventHandler = null;
+    private NativeEventHandler mNativeEventHandler = null;
     /**
      *  PCM and FFT capture listener registered by client
      */
-    protected OnDataCaptureListener mCaptureListener = null;
+    private OnDataCaptureListener mCaptureListener = null;
 
     // accessed by native methods
     private int mNativeVisualizer;
@@ -159,7 +157,7 @@ public class Visualizer {
     //--------------------
     /**
      * Class constructor.
-     * @param audioSession  System wide unique audio session identifier. If audioSession
+     * @param audioSession system wide unique audio session identifier. If audioSession
      *  is not 0, the visualizer will be attached to the MediaPlayer or AudioTrack in the
      *  same audio session. Otherwise, the Visualizer will apply to the output mix.
      *