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

All Implemented Interfaces:

java.io.Serializable, org.mobicents.media.Component, org.mobicents.media.MediaSink, org.mobicents.media.server.spi.resource.DtmfDetector

public class DetectorImpl
extends DtmfBuffer

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:

Oleg Kulikov, amit bhayani

See Also:

Serialized Form

Field Summary

static java.lang.String[][]

events

Fields inherited from class org.mobicents.media.server.impl.resource.dtmf.DtmfBuffer

interdigitInterval, TIMEOUT

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

otherParty

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

format

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

DEFAULT_INTERDIGIT_INTERVAL, DEFAULT_SIGNAL_LEVEL

Constructor Summary

DetectorImpl(java.lang.String name)
Creates new instance of Detector.

Method Summary

int	getDuration()
org.mobicents.media.Format[]	getFormats()
<T> T	getInterface(java.lang.Class<T> interfaceType)
int	getVolume()
boolean	isAcceptable(org.mobicents.media.Format format)
void	onMediaTransfer(org.mobicents.media.Buffer buffer) (Non Java-doc).
org.mobicents.media.Format	selectPreffered(java.util.Collection<org.mobicents.media.Format> formats) Implements the strategy of selecting preffred format from specified set.
void	setDuration(int duartion)
void	setLasy(boolean isLazy)
void	setVolume(int level)

Methods inherited from class org.mobicents.media.server.impl.resource.dtmf.DtmfBuffer

getInterdigitInterval, getMask, push, setInterdigitInterval, setMask

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

assignPreffered, connect, connect, disconnect, disconnect, failed, getBytesReceived, getPacketsReceived, getPreffered, isConnected, isMultipleConnectionsAllowed, isStarted, receive, resetStats, start, started, stop, stopped

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

addListener, getConnection, getEndpoint, getFormat, getId, getName, removeListener, sendEvent, setConnection, setEndpoint, subset, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mobicents.media.server.spi.resource.DtmfDetector

start, stop

Methods inherited from interface org.mobicents.media.MediaSink

connect, connect, disconnect, disconnect, getBytesReceived, getPacketsReceived, isConnected, isMultipleConnectionsAllowed, isStarted, receive

Methods inherited from interface org.mobicents.media.Component

addListener, getConnection, getEndpoint, getFormat, getId, getName, removeListener, resetStats, setConnection, setEndpoint

Field Detail

events

public static final java.lang.String[][] events

Constructor Detail

DetectorImpl

public DetectorImpl(java.lang.String name)

Creates new instance of Detector.

Method Detail

selectPreffered

public org.mobicents.media.Format selectPreffered(java.util.Collection<org.mobicents.media.Format> formats)

Description copied from class: AbstractSink

Implements the strategy of selecting preffred format from specified set. The default implemntation takes first from set but other components can override this rule.

Overrides:

selectPreffered in class AbstractSink

Parameters:

formats - the set of formats.

Returns:

preffered format or null if sink can not determine it

setDuration

public void setDuration(int duartion)

getDuration

public int getDuration()

setVolume

public void setVolume(int level)

setLasy

public void setLasy(boolean isLazy)

getVolume

public int getVolume()

onMediaTransfer

public void onMediaTransfer(org.mobicents.media.Buffer buffer)
                     throws java.io.IOException

(Non Java-doc).

Specified by:

onMediaTransfer in class AbstractSink

Parameters:

buffer - the new portion of media data.

Throws:

java.io.IOException

See Also:

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

getFormats

public org.mobicents.media.Format[] getFormats()

isAcceptable

public boolean isAcceptable(org.mobicents.media.Format format)

getInterface

public <T> T getInterface(java.lang.Class<T> interfaceType)

Specified by:

getInterface in interface org.mobicents.media.Component

Overrides:

getInterface in class AbstractSink