Virtualizer

Class Overview

An audio virtualizer is a general name for an effect to spatialize audio channels. The exact behavior of this effect is dependent on the number of audio input channels and the types and number of audio output channels of the device. For example, in the case of a stereo input and stereo headphone output, a stereo widening effect is used when this effect is turned on.

An application creates a Virtualizer object to instantiate and control a virtualizer engine in the audio framework.

The methods, parameter types and units exposed by the Virtualizer implementation are directly mapping those defined by the OpenSL ES 1.0.1 Specification (http://www.khronos.org/opensles/) for the SLVirtualizerItf interface. Please refer to this specification for more details.

To attach the Virtualizer to a particular AudioTrack or MediaPlayer, specify the audio session ID of this AudioTrack or MediaPlayer when constructing the Virtualizer.

NOTE: attaching a Virtualizer to the global audio output mix by use of session 0 is deprecated.

See getAudioSessionId() for details on audio sessions.

See AudioEffect class for more details on controlling audio effects.

Summary

[Expand] Inherited Constants

From class android.media.audiofx.AudioEffect String ACTION_CLOSE_AUDIO_EFFECT_CONTROL_SESSION Intent to signal to the effect control application or service that an audio session is closed and that effects should not be applied anymore. String ACTION_DISPLAY_AUDIO_EFFECT_CONTROL_PANEL Intent to launch an audio effect control panel UI. String ACTION_OPEN_AUDIO_EFFECT_CONTROL_SESSION Intent to signal to the effect control application or service that a new audio session is opened and requires audio effects to be applied. int ALREADY_EXISTS Internal operation status. int CONTENT_TYPE_GAME Value for EXTRA_CONTENT_TYPE when the type of content played is game audio int CONTENT_TYPE_MOVIE Value for EXTRA_CONTENT_TYPE when the type of content played is video or movie int CONTENT_TYPE_MUSIC Value for EXTRA_CONTENT_TYPE when the type of content played is music int CONTENT_TYPE_VOICE Value for EXTRA_CONTENT_TYPE when the type of content played is voice audio String EFFECT_AUXILIARY Effect connection mode is auxiliary. String EFFECT_INSERT Effect connection mode is insert. int ERROR Unspecified error. int ERROR_BAD_VALUE Operation failed due to bad parameter value. int ERROR_DEAD_OBJECT Operation failed due to dead remote object. int ERROR_INVALID_OPERATION Operation failed because it was requested in wrong state. int ERROR_NO_INIT Operation failed due to bad object initialization. int ERROR_NO_MEMORY Operation failed due to lack of memory. String EXTRA_AUDIO_SESSION Contains the ID of the audio session the effects should be applied to. String EXTRA_CONTENT_TYPE Indicates which type of content is played by the application. String EXTRA_PACKAGE_NAME Contains the package name of the calling application. int SUCCESS Successful operation.

[Expand] Inherited Fields

From class android.media.audiofx.AudioEffect public static final UUID EFFECT_TYPE_AEC UUID for Acoustic Echo Canceler (AEC) public static final UUID EFFECT_TYPE_AGC UUID for Automatic Gain Control (AGC) public static final UUID EFFECT_TYPE_BASS_BOOST UUID for bass boost effect public static final UUID EFFECT_TYPE_ENV_REVERB UUID for environmental reverberation effect public static final UUID EFFECT_TYPE_EQUALIZER UUID for equalizer effect public static final UUID EFFECT_TYPE_LOUDNESS_ENHANCER UUID for Loudness Enhancer public static final UUID EFFECT_TYPE_NS UUID for Noise Suppressor (NS) public static final UUID EFFECT_TYPE_PRESET_REVERB UUID for preset reverberation effect public static final UUID EFFECT_TYPE_VIRTUALIZER UUID for virtualizer effect

[Expand] Inherited Methods
From class android.media.audiofx.AudioEffect void finalize () Invoked when the garbage collector has detected that this instance is no longer reachable. AudioEffect.Descriptor getDescriptor () Get the effect descriptor. boolean getEnabled () Returns effect enabled state int getId () Returns effect unique identifier. boolean hasControl () Checks if this AudioEffect object is controlling the effect engine. static Descriptor[] queryEffects () Query all effects available on the platform. void release () Releases the native AudioEffect resources. void setControlStatusListener ( AudioEffect.OnControlStatusChangeListener listener) Sets the listener AudioEffect notifies when the effect engine control is taken or returned. void setEnableStatusListener ( AudioEffect.OnEnableStatusChangeListener listener) Sets the listener AudioEffect notifies when the effect engine is enabled or disabled. int setEnabled (boolean enabled) Enable or disable the effect.
From class java.lang.Object Object clone () Creates and returns a copy of this Object . boolean equals ( Object o) Compares this instance with the specified object and indicates if they are equal. void finalize () Invoked when the garbage collector has detected that this instance is no longer reachable. final Class <?> getClass () Returns the unique instance of Class that represents this object's class. int hashCode () Returns an integer hash code for this object. final void notify () Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up. final void notifyAll () Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up. String toString () Returns a string containing a concise, human-readable description of this object. final void wait () Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object. final void wait (long millis, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires. final void wait (long millis) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.