org.mobicents.media.server.impl.resource.dtmf

Class DetectorImpl

java.lang.Object

org.mobicents.media.server.impl.BaseComponent

org.mobicents.media.server.impl.AbstractSink

org.mobicents.media.server.impl.resource.dtmf.DetectorImpl

All Implemented Interfaces:

Serializable, Component, MediaSink, DtmfDetector, PooledObject

public class DetectorImpl
extends AbstractSink
implements DtmfDetector, PooledObject

Implements inband DTMF detector. Inband means that DTMF is transmitted within the audio of the phone conversation, i.e. it is audible to the conversation partners. Therefore only uncompressed codecs like g711 alaw or ulaw can carry inband DTMF reliably. Female voice are known to once in a while trigger the recognition of a DTMF tone. For analog lines inband is the only possible means to transmit DTMF. Though Inband DTMF detection may work for other codecs like SPEEX, GSM, G729 as DtmfDetector is using DSP in front of InbandDetector there is no guarantee that it will always work. In future MMS may not have DSP in front of InbandDetector and hence Inband detection for codecs like SPEEX, GSM, G729 may completely stop

Author:

yulian oifa, amit bhayani, Henrique Rosa (henrique.rosa@telestax.com)

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	DetectorImpl.EventSender

Field Summary

Fields

Modifier and Type	Field and Description
static String[][]	events

Fields inherited from interface org.mobicents.media.server.spi.dtmf.DtmfDetector

DEFAULT_INTERDIGIT_INTERVAL, DEFAULT_SIGNAL_LEVEL

Constructor Summary

Constructors

Constructor and Description
DetectorImpl(String name, org.mobicents.media.server.scheduler.PriorityQueueScheduler scheduler)

Method Summary

Methods

Modifier and Type	Method and Description
void	activate()
void	addListener(DtmfDetectorListener listener)
void	checkIn()
void	checkOut()
void	clearAllListeners()
void	clearBuffer()
void	clearDigits()
void	deactivate()
protected void	fireEvent(Collection<DtmfEventImpl> evts)
protected void	fireEvent(DtmfEventImpl evt)
protected void	fireEvent(String tone)
void	flushBuffer()
AudioOutput	getAudioOutput()
int	getDuration()
int	getInterdigitInterval()
String	getMask()
Formats	getNativeFormats()
OOBOutput	getOOBOutput()
int	getVolume()
void	onMediaTransfer(Frame buffer)
void	removeListener(DtmfDetectorListener listener)
void	setDuration(int duartion)
void	setInterdigitInterval(int interval)
void	setLasy(boolean isLazy)
void	setMask(String mask)
void	setVolume(int level)

Methods inherited from class org.mobicents.media.server.impl.AbstractSink

failed, getBytesReceived, getPacketsReceived, isStarted, perform, report, reset, start, started, stop, stopped

Methods inherited from class org.mobicents.media.server.impl.BaseComponent

getId, getName

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mobicents.media.MediaSink

getBytesReceived, getPacketsReceived, isStarted, perform

Methods inherited from interface org.mobicents.media.Component

getId, getName, reset

Field Detail

events

public static final String[][] events

Constructor Detail

DetectorImpl

public DetectorImpl(String name,
            org.mobicents.media.server.scheduler.PriorityQueueScheduler scheduler)

Method Detail

getAudioOutput

public AudioOutput getAudioOutput()

getOOBOutput

public OOBOutput getOOBOutput()

activate

public void activate()

Specified by:

activate in interface Component

Specified by:

activate in interface DtmfDetector

Specified by:

activate in class AbstractSink

deactivate

public void deactivate()

Specified by:

deactivate in interface Component

Specified by:

deactivate in interface DtmfDetector

Specified by:

deactivate in class AbstractSink

setDuration

public void setDuration(int duartion)

getDuration

public int getDuration()

setVolume

public void setVolume(int level)

Specified by:

setVolume in interface DtmfDetector

setLasy

public void setLasy(boolean isLazy)

getVolume

public int getVolume()

Specified by:

getVolume in interface DtmfDetector

onMediaTransfer

public void onMediaTransfer(Frame buffer)
                     throws IOException

Specified by:

onMediaTransfer in class AbstractSink

Throws:

IOException

getNativeFormats

public Formats getNativeFormats()

getMask

public String getMask()

setMask

public void setMask(String mask)

setInterdigitInterval

public void setInterdigitInterval(int interval)

Specified by:

setInterdigitInterval in interface DtmfDetector

getInterdigitInterval

public int getInterdigitInterval()

Specified by:

getInterdigitInterval in interface DtmfDetector

fireEvent

protected void fireEvent(String tone)

fireEvent

protected void fireEvent(DtmfEventImpl evt)

fireEvent

protected void fireEvent(Collection<DtmfEventImpl> evts)

flushBuffer

public void flushBuffer()

Specified by:

flushBuffer in interface DtmfDetector

clearBuffer

public void clearBuffer()

addListener

public void addListener(DtmfDetectorListener listener)
                 throws TooManyListenersException

Specified by:

addListener in interface DtmfDetector

Throws:

TooManyListenersException

removeListener

public void removeListener(DtmfDetectorListener listener)

Specified by:

removeListener in interface DtmfDetector

clearAllListeners

public void clearAllListeners()

Specified by:

clearAllListeners in interface DtmfDetector

clearDigits

public void clearDigits()

Specified by:

clearDigits in interface DtmfDetector

checkIn

public void checkIn()

Specified by:

checkIn in interface PooledObject

checkOut

public void checkOut()

Specified by:

checkOut in interface PooledObject