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

public class DetectorImpl
extends AbstractSink
implements DtmfDetector

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

See Also:

Serialized Form

Nested Class Summary

class

DetectorImpl.EventSender

Field Summary

static String[][]

events

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

DEFAULT_INTERDIGIT_INTERVAL, DEFAULT_SIGNAL_LEVEL

Constructor Summary

DetectorImpl(String name, org.mobicents.media.server.scheduler.Scheduler scheduler)
Creates new instance of Detector.

Method Summary

void	activate()
void	addListener(DtmfDetectorListener listener) (Non Java-doc.)
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()
CompoundOutput	getCompoundOutput()
int	getDuration()
int	getInterdigitInterval()
String	getMask()
Formats	getNativeFormats()
int	getVolume()
void	onMediaTransfer(Frame buffer) (Non Java-doc).
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

clearEndpoint, getEndpoint, getId, getName, setEndpoint

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

clearEndpoint, getEndpoint, getId, getName, reset, setEndpoint

Field Detail

events

public static final String[][] events

Constructor Detail

DetectorImpl

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

Creates new instance of Detector.

Method Detail

getCompoundOutput

public CompoundOutput getCompoundOutput()

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

(Non Java-doc).

Specified by:

onMediaTransfer in class AbstractSink

Throws:

IOException

See Also:

org.mobicents.media.protocol.BufferTransferHandler.transferData().

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

(Non Java-doc.)

Specified by:

addListener in interface DtmfDetector

Throws:

TooManyListenersException

See Also:

org.mobicents.media.Component#addListener(NotificationListener).

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