org.jitsi.impl.neomedia.audiolevel

Class AudioLevelEffect

java.lang.Object

org.jitsi.impl.neomedia.control.AbstractControls

org.jitsi.impl.neomedia.control.ControlsAdapter

org.jitsi.impl.neomedia.audiolevel.AudioLevelEffect

All Implemented Interfaces:

javax.media.Codec, javax.media.Controls, javax.media.Effect, javax.media.PlugIn

public class AudioLevelEffect
extends ControlsAdapter
implements javax.media.Effect

An effect that would pass data to the AudioLevelEventDispatcher so that it would calculate levels and dispatch changes to interested parties.

Author:

Damian Minkov, Emil Ivov, Lyubomir Marinov

Field Summary

Fields inherited from class org.jitsi.impl.neomedia.control.ControlsAdapter

EMPTY_CONTROLS

Fields inherited from interface javax.media.PlugIn

BUFFER_PROCESSED_FAILED, BUFFER_PROCESSED_OK, INPUT_BUFFER_NOT_CONSUMED, OUTPUT_BUFFER_NOT_FILLED, PLUGIN_TERMINATED

Constructor Summary

Constructors

Constructor and Description
AudioLevelEffect() The minimum and maximum values of the scale

Method Summary

Modifier and Type	Method and Description
void	close() Closes this effect.
SimpleAudioLevelListener	getAudioLevelListener() Returns the audio level listener.
String	getName() Gets the name of this plug-in as a human-readable string.
javax.media.Format[]	getSupportedInputFormats() Lists all of the input formats that this codec accepts.
javax.media.Format[]	getSupportedOutputFormats(javax.media.Format input) Lists the output formats that this codec can generate.
void	open() Opens this effect.
int	process(javax.media.Buffer inputBuffer, javax.media.Buffer outputBuffer) Performs the media processing defined by this codec.
void	reset() Resets its state.
void	setAudioLevelListener(SimpleAudioLevelListener listener) Sets (or unsets if listener is null), the listener that is going to be notified of audio level changes detected by this effect.
javax.media.Format	setInputFormat(javax.media.Format format) Sets the format of the data to be input to this codec.
javax.media.Format	setOutputFormat(javax.media.Format format) Sets the format for the data this codec outputs.

Methods inherited from class org.jitsi.impl.neomedia.control.ControlsAdapter

getControls

Methods inherited from class org.jitsi.impl.neomedia.control.AbstractControls

getControl, getControl, queryInterface, queryInterface

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface javax.media.Controls

getControl, getControls

Constructor Detail

AudioLevelEffect

public AudioLevelEffect()

The minimum and maximum values of the scale

Method Detail

setAudioLevelListener

public void setAudioLevelListener(SimpleAudioLevelListener listener)

Sets (or unsets if listener is null), the listener that is going to be notified of audio level changes detected by this effect. Given the semantics of the AudioLevelEventDispatcher this effect would do no real work if no listener is set or if it is set to null.

Parameters:

listener - the SimpleAudioLevelListener that we'd like to receive level changes or null if we'd like level measurements to stop.

getAudioLevelListener

public SimpleAudioLevelListener getAudioLevelListener()

Returns the audio level listener.

Returns:

the audio level listener or null if it does not exist.

getSupportedInputFormats

public javax.media.Format[] getSupportedInputFormats()

Lists all of the input formats that this codec accepts.

Specified by:

getSupportedInputFormats in interface javax.media.Codec

Returns:

An array that contains the supported input Formats.

getSupportedOutputFormats

public javax.media.Format[] getSupportedOutputFormats(javax.media.Format input)

Lists the output formats that this codec can generate.

Specified by:

getSupportedOutputFormats in interface javax.media.Codec

Parameters:

input - The Format of the data to be used as input to the plug-in.

Returns:

An array that contains the supported output Formats.

setInputFormat

public javax.media.Format setInputFormat(javax.media.Format format)

Sets the format of the data to be input to this codec.

Specified by:

setInputFormat in interface javax.media.Codec

Parameters:

format - The Format to be set.

Returns:

The Format that was set.

setOutputFormat

public javax.media.Format setOutputFormat(javax.media.Format format)

Sets the format for the data this codec outputs.

Specified by:

setOutputFormat in interface javax.media.Codec

Parameters:

format - The Format to be set.

Returns:

The Format that was set.

process

public int process(javax.media.Buffer inputBuffer,
                   javax.media.Buffer outputBuffer)

Performs the media processing defined by this codec.

Specified by:

process in interface javax.media.Codec

Parameters:

inputBuffer - The Buffer that contains the media data to be processed.

outputBuffer - The Buffer in which to store the processed media data.

Returns:

BUFFER_PROCESSED_OK if the processing is successful.

See Also:

PlugIn

getName

public String getName()

Gets the name of this plug-in as a human-readable string.

Specified by:

getName in interface javax.media.PlugIn

Returns:

A String that contains the descriptive name of the plug-in.

open

public void open()
          throws javax.media.ResourceUnavailableException

Opens this effect.

Specified by:

open in interface javax.media.PlugIn

Throws:

javax.media.ResourceUnavailableException - If all of the required resources cannot be acquired.

close

public void close()

Closes this effect.

Specified by:

close in interface javax.media.PlugIn

reset

public void reset()

Resets its state.

Specified by:

reset in interface javax.media.PlugIn