NoiseSuppressor Class

Definition

Namespace:

Android.Media.Audiofx

Assembly:

Mono.Android.dll

Noise Suppressor (NS).

[Android.Runtime.Register("android/media/audiofx/NoiseSuppressor", DoNotGenerateAcw=true)]
public class NoiseSuppressor : Android.Media.Audiofx.AudioEffect

[<Android.Runtime.Register("android/media/audiofx/NoiseSuppressor", DoNotGenerateAcw=true)>]
type NoiseSuppressor = class
    inherit AudioEffect

Inheritance

Object

Object

AudioEffect

NoiseSuppressor

Attributes

RegisterAttribute

Remarks

Noise Suppressor (NS).

Noise suppression (NS) is an audio pre-processor which removes background noise from the captured signal. The component of the signal considered as noise can be either stationary (car/airplane engine, AC system) or non-stationary (other peoples conversations, car horn) for more advanced implementations.

NS is mostly used by voice communication applications (voice chat, video conferencing, SIP calls).

An application creates a NoiseSuppressor object to instantiate and control an NS engine in the audio framework.

To attach the NoiseSuppressor to a particular android.media.AudioRecord, specify the audio session ID of this AudioRecord when creating the NoiseSuppressor. The audio session is retrieved by calling android.media.AudioRecord#getAudioSessionId() on the AudioRecord instance.

On some devices, NS can be inserted by default in the capture path by the platform according to the android.media.MediaRecorder.AudioSource used. The application should call NoiseSuppressor.getEnable() after creating the NS to check the default NS activation state on a particular AudioRecord session.

See android.media.audiofx.AudioEffect class for more details on controlling audio effects.

Java documentation for android.media.audiofx.NoiseSuppressor.

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Constructors

NoiseSuppressor(IntPtr, JniHandleOwnership)

A constructor used when creating managed representations of JNI objects; called by the runtime.

Fields

ActionCloseAudioEffectControlSession	Intent to signal to the effect control application or service that an audio session is closed and that effects should not be applied anymore. (Inherited from AudioEffect)
ActionDisplayAudioEffectControlPanel	Intent to launch an audio effect control panel UI. (Inherited from AudioEffect)
ActionOpenAudioEffectControlSession	Intent to signal to the effect control application or service that a new audio session is opened and requires audio effects to be applied. (Inherited from AudioEffect)
AlreadyExists	Obsolete. Internal operation status. (Inherited from AudioEffect)
ContentTypeGame	Obsolete. Value for #EXTRA_CONTENT_TYPE when the type of content played is game audio (Inherited from AudioEffect)
ContentTypeMovie	Obsolete. Value for #EXTRA_CONTENT_TYPE when the type of content played is video or movie (Inherited from AudioEffect)
ContentTypeMusic	Obsolete. Value for #EXTRA_CONTENT_TYPE when the type of content played is music (Inherited from AudioEffect)
ContentTypeVoice	Obsolete. Value for #EXTRA_CONTENT_TYPE when the type of content played is voice audio (Inherited from AudioEffect)
EffectAuxiliary	Effect connection mode is auxiliary. (Inherited from AudioEffect)
EffectInsert	Effect connection mode is insert. (Inherited from AudioEffect)
EffectPostProcessing	Effect connection mode is post processing. (Inherited from AudioEffect)
EffectPreProcessing	Effect connection mode is pre processing. (Inherited from AudioEffect)
Error	Obsolete. Unspecified error. (Inherited from AudioEffect)
ErrorBadValue	Obsolete. Operation failed due to bad parameter value. (Inherited from AudioEffect)
ErrorDeadObject	Obsolete. Operation failed due to dead remote object. (Inherited from AudioEffect)
ErrorInvalidOperation	Obsolete. Operation failed because it was requested in wrong state. (Inherited from AudioEffect)
ErrorNoInit	Obsolete. Operation failed due to bad object initialization. (Inherited from AudioEffect)
ErrorNoMemory	Obsolete. Operation failed due to lack of memory. (Inherited from AudioEffect)
ExtraAudioSession	Contains the ID of the audio session the effects should be applied to. (Inherited from AudioEffect)
ExtraContentType	Indicates which type of content is played by the application. (Inherited from AudioEffect)
ExtraPackageName	Contains the package name of the calling application. (Inherited from AudioEffect)
Success	Obsolete. Successful operation. (Inherited from AudioEffect)

Properties

Class	Returns the runtime class of this Object. (Inherited from Object)
Enabled	Returns effect enabled state (Inherited from AudioEffect)
Handle	The handle to the underlying Android instance. (Inherited from Object)
HasControl	Checks if this AudioEffect object is controlling the effect engine. (Inherited from AudioEffect)
Id	Returns effect unique identifier. (Inherited from AudioEffect)
IsAvailable	Checks if the device implements noise suppression.
JniIdentityHashCode	(Inherited from Object)
JniPeerMembers
PeerReference	(Inherited from Object)
ThresholdClass	This API supports the Mono for Android infrastructure and is not intended to be used directly from your code.
ThresholdType	This API supports the Mono for Android infrastructure and is not intended to be used directly from your code.

Methods

Clone()	Creates and returns a copy of this object. (Inherited from Object)
Create(Int32)	Creates a NoiseSuppressor and attaches it to the AudioRecord on the audio session specified.
Dispose()	(Inherited from Object)
Dispose(Boolean)	(Inherited from Object)
Equals(Object)	Indicates whether some other object is "equal to" this one. (Inherited from Object)
GetDescriptor()	Get the effect descriptor. (Inherited from AudioEffect)
GetHashCode()	Returns a hash code value for the object. (Inherited from Object)
JavaFinalize()	Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object)
Notify()	Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object)
NotifyAll()	Wakes up all threads that are waiting on this object's monitor. (Inherited from Object)
Release()	Releases the native AudioEffect resources. (Inherited from AudioEffect)
SetControlStatusListener(AudioEffect+IOnControlStatusChangeListener)	Sets the listener AudioEffect notifies when the effect engine control is taken or returned. (Inherited from AudioEffect)
SetEnabled(Boolean)	Enable or disable the effect. (Inherited from AudioEffect)
SetEnableStatusListener(AudioEffect+IOnEnableStatusChangeListener)	Sets the listener AudioEffect notifies when the effect engine is enabled or disabled. (Inherited from AudioEffect)
SetHandle(IntPtr, JniHandleOwnership)	Sets the Handle property. (Inherited from Object)
ToArray<T>()	(Inherited from Object)
ToString()	Returns a string representation of the object. (Inherited from Object)
UnregisterFromRuntime()	(Inherited from Object)
Wait()	Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object)
Wait(Int64, Int32)	Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object)
Wait(Int64)	Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object)

Events

ControlStatus	(Inherited from AudioEffect)
EnableStatus	(Inherited from AudioEffect)

Explicit Interface Implementations

IJavaPeerable.Disposed()	(Inherited from Object)
IJavaPeerable.DisposeUnlessReferenced()	(Inherited from Object)
IJavaPeerable.Finalized()	(Inherited from Object)
IJavaPeerable.JniManagedPeerState	(Inherited from Object)
IJavaPeerable.SetJniIdentityHashCode(Int32)	(Inherited from Object)
IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates)	(Inherited from Object)
IJavaPeerable.SetPeerReference(JniObjectReference)	(Inherited from Object)

Extension Methods

JavaCast<TResult>(IJavaObject)	Performs an Android runtime-checked type conversion.
JavaCast<TResult>(IJavaObject)
GetJniTypeName(IJavaPeerable)