From 728d15167c1eb91df760c8617a8062597e9e120c Mon Sep 17 00:00:00 2001
From: Lyubomir Marinov <lyubomir.marinov@jitsi.org>
Date: Mon, 7 Jan 2013 07:01:37 +0000
Subject: [PATCH] Works on fixing issues with Jitsi VideoBridge telephony
conferencing.
---
.../impl/neomedia/AudioMediaStreamImpl.java | 416 +++++++++---------
.../device/AudioMediaDeviceSession.java | 88 ++--
.../device/AudioMixerMediaDevice.java | 2 +
.../service/neomedia/AudioMediaStream.java | 47 +-
4 files changed, 277 insertions(+), 276 deletions(-)
diff --git a/src/org/jitsi/impl/neomedia/AudioMediaStreamImpl.java b/src/org/jitsi/impl/neomedia/AudioMediaStreamImpl.java
index b5bfc20c..26f6d179 100644
--- a/src/org/jitsi/impl/neomedia/AudioMediaStreamImpl.java
+++ b/src/org/jitsi/impl/neomedia/AudioMediaStreamImpl.java
@@ -38,23 +38,6 @@ public class AudioMediaStreamImpl
PropertyChangeListener
{
- /**
- * The <tt>Logger</tt> used by the <tt>AudioMediaStreamImpl</tt> class and
- * its instances for logging output.
- */
- private static final Logger logger
- = Logger.getLogger(AudioMediaStreamImpl.class);
-
- /**
- * The transformer that we use for sending and receiving DTMF packets.
- */
- private DtmfTransformEngine dtmfTransfrmEngine ;
-
- /**
- * List of DTMF listeners;
- */
- private List<DTMFListener> dtmfListeners = new ArrayList<DTMFListener>();
-
/**
* List of RTP format strings which are supported by SIP Communicator in
* addition to the JMF standard formats.
@@ -83,10 +66,11 @@ public class AudioMediaStreamImpl
};
/**
- * The listener that gets notified of changes in the audio level of
- * remote conference participants.
+ * The <tt>Logger</tt> used by the <tt>AudioMediaStreamImpl</tt> class and
+ * its instances for logging output.
*/
- private CsrcAudioLevelListener csrcAudioLevelListener = null;
+ private static final Logger logger
+ = Logger.getLogger(AudioMediaStreamImpl.class);
/**
* A property change notifier which will inform this stream if a selected
@@ -96,6 +80,23 @@ public class AudioMediaStreamImpl
*/
private PropertyChangeNotifier audioSystemChangeNotifier;
+ /**
+ * The listener that gets notified of changes in the audio level of
+ * remote conference participants.
+ */
+ private CsrcAudioLevelListener csrcAudioLevelListener = null;
+
+ /**
+ * The list of DTMF listeners;
+ */
+ private final List<DTMFListener> dtmfListeners
+ = new ArrayList<DTMFListener>();
+
+ /**
+ * The transformer that we use for sending and receiving DTMF packets.
+ */
+ private DtmfTransformEngine dtmfTransfrmEngine ;
+
/**
* Initializes a new <tt>AudioMediaStreamImpl</tt> instance which will use
* the specified <tt>MediaDevice</tt> for both capture and playback of audio
@@ -124,6 +125,67 @@ public AudioMediaStreamImpl(StreamConnector connector,
this.audioSystemChangeNotifier.addPropertyChangeListener(this);
}
+ /**
+ * Adds a <tt>DTMFListener</tt> to this <tt>AudioMediaStream</tt> which is
+ * to receive notifications when the remote party starts sending DTMF tones
+ * to us.
+ *
+ * @param listener the <tt>DTMFListener</tt> to register for notifications
+ * about the remote party starting sending of DTM tones to this
+ * <tt>AudioMediaStream</tt>
+ * @see AudioMediaStream#addDTMFListener(DTMFListener)
+ */
+ public void addDTMFListener(DTMFListener listener)
+ {
+ if((listener != null) && !dtmfListeners.contains(listener))
+ dtmfListeners.add(listener);
+ }
+
+ /**
+ * In addition to calling
+ * {@link MediaStreamImpl#addRTPExtension(byte, RTPExtension)}
+ * this method enables sending of CSRC audio levels. The reason we are
+ * doing this here rather than in the super class is that CSRC levels only
+ * make sense for audio streams so we don't want them enabled in any other
+ * type.
+ *
+ * @param extensionID the ID assigned to <tt>rtpExtension</tt> for the
+ * lifetime of this stream.
+ * @param rtpExtension the RTPExtension that is being added to this stream.
+ */
+ @Override
+ public void addRTPExtension(byte extensionID, RTPExtension rtpExtension)
+ {
+ super.addRTPExtension(extensionID, rtpExtension);
+
+ if (RTPExtension.CSRC_AUDIO_LEVEL_URN.equals(
+ rtpExtension.getURI().toString()))
+ {
+ getCsrcEngine().setCsrcAudioLevelAudioLevelExtensionID(
+ extensionID,
+ rtpExtension.getDirection());
+ }
+ }
+
+ /**
+ * Releases the resources allocated by this instance in the course of its
+ * execution and prepares it to be garbage collected.
+ *
+ * @see MediaStream#close()
+ */
+ @Override
+ public void close()
+ {
+ super.close();
+
+ if(dtmfTransfrmEngine != null)
+ {
+ dtmfTransfrmEngine = null;
+ }
+
+ this.audioSystemChangeNotifier.removePropertyChangeListener(this);
+ }
+
/**
* Performs any optional configuration on the <tt>BufferControl</tt> of the
* specified <tt>RTPManager</tt> which is to be used as the
@@ -198,53 +260,110 @@ protected DtmfTransformEngine createDtmfTransformEngine()
{
if(this.dtmfTransfrmEngine == null)
this.dtmfTransfrmEngine = new DtmfTransformEngine(this);
-
return this.dtmfTransfrmEngine;
}
/**
- * Adds a <tt>DTMFListener</tt> to this <tt>AudioMediaStream</tt> which is
- * to receive notifications when the remote party starts sending DTMF tones
- * to us.
+ * Delivers the <tt>audioLevels</tt> map to whoever's interested. This
+ * method is meant for use primarily by the transform engine handling
+ * incoming RTP packets (currently <tt>CsrcTransformEngine</tt>).
*
- * @param listener the <tt>DTMFListener</tt> to register for notifications
- * about the remote party starting sending of DTM tones to this
- * <tt>AudioMediaStream</tt>
- * @see AudioMediaStream#addDTMFListener(DTMFListener)
+ * @param audioLevels a array mapping CSRC IDs to audio levels in
+ * consecutive elements.
*/
- public void addDTMFListener(DTMFListener listener)
+ public void fireConferenceAudioLevelEvent(long[] audioLevels)
{
- if(!dtmfListeners.contains(listener))
+ CsrcAudioLevelListener csrcAudioLevelListener
+ = this.csrcAudioLevelListener;
+
+ if (csrcAudioLevelListener != null)
+ csrcAudioLevelListener.audioLevelsReceived(audioLevels);
+ }
+
+ /**
+ * Delivers the <tt>DTMF</tt> tones. The method is meant for use primarily
+ * by the transform engine handling incoming RTP packets (currently
+ * <tt>DtmfTransformEngine</tt>).
+ *
+ * @param tone the new tone
+ * @param end <tt>true</tt> if the tone is to be ended or <tt>false</tt> to
+ * be started
+ */
+ public void fireDTMFEvent(DTMFRtpTone tone, boolean end)
+ {
+ DTMFToneEvent ev = new DTMFToneEvent(this, tone);
+
+ for (DTMFListener listener : dtmfListeners)
{
- dtmfListeners.add(listener);
+ if(end)
+ listener.dtmfToneReceptionEnded(ev);
+ else
+ listener.dtmfToneReceptionStarted(ev);
}
}
/**
- * Sets <tt>listener</tt> as the <tt>SimpleAudioLevelListener</tt>
- * registered to receive notifications from our device session for changes
- * in the levels of the party that's at the other end of this stream.
+ * Returns the <tt>MediaDeviceSession</tt> associated with this stream
+ * after first casting it to <tt>AudioMediaDeviceSession</tt> since this is,
+ * after all, an <tt>AudioMediaStreamImpl</tt>.
*
- * @param listener the <tt>SimpleAudioLevelListener</tt> that we'd like to
- * register or <tt>null</tt> if we want to stop stream audio level
- * measurements.
+ * @return the <tt>AudioMediaDeviceSession</tt> associated with this stream.
*/
- public void setStreamAudioLevelListener(SimpleAudioLevelListener listener)
+ @Override
+ public AudioMediaDeviceSession getDeviceSession()
{
- getDeviceSession().setStreamAudioLevelListener(listener);
+ return (AudioMediaDeviceSession) super.getDeviceSession();
}
/**
- * Registers <tt>listener</tt> as the <tt>CsrcAudioLevelListener</tt> that
- * will receive notifications for changes in the levels of conference
- * participants that the remote party could be mixing.
+ * Returns the last audio level that was measured by the underlying device
+ * session for the specified <tt>ssrc</tt> (where <tt>ssrc</tt> could also
+ * correspond to our local sync source identifier).
*
- * @param listener the <tt>CsrcAudioLevelListener</tt> that we'd like to
- * register or <tt>null</tt> if we'd like to stop receiving notifications.
+ * @param ssrc the SSRC ID whose last measured audio level we'd like to
+ * retrieve.
+ *
+ * @return the audio level that was last measured for the specified
+ * <tt>ssrc</tt> or <tt>-1</tt> if no level has been cached for that ID.
*/
- public void setCsrcAudioLevelListener(CsrcAudioLevelListener listener)
+ public int getLastMeasuredAudioLevel(long ssrc)
{
- this.csrcAudioLevelListener = listener;
+ AudioMediaDeviceSession devSession = getDeviceSession();
+
+ if (devSession == null)
+ return -1;
+ else if (ssrc == getLocalSourceID())
+ return devSession.getLastMeasuredLocalUserAudioLevel();
+ else
+ return devSession.getLastMeasuredAudioLevel(ssrc);
+ }
+
+ /**
+ * The priority of the audio is 3, which is meant to be higher than
+ * other threads and higher than the video one.
+ * @return audio priority.
+ */
+ @Override
+ protected int getPriority()
+ {
+ return 3;
+ }
+
+ /**
+ * Receives and reacts to property change events: if the selected device
+ * (for capture, playback or notifications) has changed, then create or
+ * recreate the streams in order to use it.
+ * We want to listen to these events, especially for those generated after
+ * the audio system has changed.
+ *
+ * @param evt The event which may contain a audio system change event.
+ */
+ public void propertyChange(PropertyChangeEvent evt)
+ {
+ if (sendStreamsAreCreated)
+ recreateSendStreams();
+ else
+ start();
}
/**
@@ -292,6 +411,48 @@ public void removeDTMFListener(DTMFListener listener)
dtmfListeners.remove(listener);
}
+ /**
+ * Registers <tt>listener</tt> as the <tt>CsrcAudioLevelListener</tt> that
+ * will receive notifications for changes in the levels of conference
+ * participants that the remote party could be mixing.
+ *
+ * @param listener the <tt>CsrcAudioLevelListener</tt> that we'd like to
+ * register or <tt>null</tt> if we'd like to stop receiving notifications.
+ */
+ public void setCsrcAudioLevelListener(CsrcAudioLevelListener listener)
+ {
+ this.csrcAudioLevelListener = listener;
+ }
+
+ /**
+ * Sets <tt>listener</tt> as the <tt>SimpleAudioLevelListener</tt>
+ * registered to receive notifications from our device session for changes
+ * in the levels of the audio that this stream is sending out.
+ *
+ * @param listener the <tt>SimpleAudioLevelListener</tt> that we'd like to
+ * register or <tt>null</tt> if we want to stop local audio level
+ * measurements.
+ */
+ public void setLocalUserAudioLevelListener(
+ SimpleAudioLevelListener listener)
+ {
+ getDeviceSession().setLocalUserAudioLevelListener(listener);
+ }
+
+ /**
+ * Sets <tt>listener</tt> as the <tt>SimpleAudioLevelListener</tt>
+ * registered to receive notifications from our device session for changes
+ * in the levels of the party that's at the other end of this stream.
+ *
+ * @param listener the <tt>SimpleAudioLevelListener</tt> that we'd like to
+ * register or <tt>null</tt> if we want to stop stream audio level
+ * measurements.
+ */
+ public void setStreamAudioLevelListener(SimpleAudioLevelListener listener)
+ {
+ getDeviceSession().setStreamAudioLevelListener(listener);
+ }
+
/**
* Starts sending the specified <tt>DTMFTone</tt> until the
* <tt>stopSendingDTMF()</tt> method is called (Excepts for INBAND DTMF,
@@ -375,167 +536,4 @@ public void stopSendingDTMF(DTMFMethod dtmfMethod)
throw new IllegalArgumentException("dtmfMethod");
}
}
-
- /**
- * In addition to calling
- * {@link MediaStreamImpl#addRTPExtension(byte, RTPExtension)}
- * this method enables sending of CSRC audio levels. The reason we are
- * doing this here rather than in the super class is that CSRC levels only
- * make sense for audio streams so we don't want them enabled in any other
- * type.
- *
- * @param extensionID the ID assigned to <tt>rtpExtension</tt> for the
- * lifetime of this stream.
- * @param rtpExtension the RTPExtension that is being added to this stream.
- */
- @Override
- public void addRTPExtension(byte extensionID, RTPExtension rtpExtension)
- {
- super.addRTPExtension(extensionID, rtpExtension);
-
- if (RTPExtension.CSRC_AUDIO_LEVEL_URN.equals(
- rtpExtension.getURI().toString()))
- {
- getCsrcEngine().setCsrcAudioLevelAudioLevelExtensionID(
- extensionID,
- rtpExtension.getDirection());
- }
- }
-
- /**
- * Sets <tt>listener</tt> as the <tt>SimpleAudioLevelListener</tt>
- * registered to receive notifications from our device session for changes
- * in the levels of the audio that this stream is sending out.
- *
- * @param listener the <tt>SimpleAudioLevelListener</tt> that we'd like to
- * register or <tt>null</tt> if we want to stop local audio level
- * measurements.
- */
- public void setLocalUserAudioLevelListener(
- SimpleAudioLevelListener listener)
- {
- getDeviceSession().setLocalUserAudioLevelListener(listener);
- }
-
- /**
- * Returns the <tt>MediaDeviceSession</tt> associated with this stream
- * after first casting it to <tt>AudioMediaDeviceSession</tt> since this is,
- * after all, an <tt>AudioMediaStreamImpl</tt>.
- *
- * @return the <tt>AudioMediaDeviceSession</tt> associated with this stream.
- */
- @Override
- public AudioMediaDeviceSession getDeviceSession()
- {
- return (AudioMediaDeviceSession) super.getDeviceSession();
- }
-
- /**
- * Returns the last audio level that was measured by the underlying device
- * session for the specified <tt>ssrc</tt> (where <tt>ssrc</tt> could also
- * correspond to our local sync source identifier).
- *
- * @param ssrc the SSRC ID whose last measured audio level we'd like to
- * retrieve.
- *
- * @return the audio level that was last measured for the specified
- * <tt>ssrc</tt> or <tt>-1</tt> if no level has been cached for that ID.
- */
- public int getLastMeasuredAudioLevel(long ssrc)
- {
- AudioMediaDeviceSession devSession = getDeviceSession();
-
- if (devSession == null)
- return -1;
- else if (ssrc == getLocalSourceID())
- return devSession.getLastMeasuredLocalUserAudioLevel();
- else
- return devSession.getLastMeasuredAudioLevel(ssrc);
- }
-
- /**
- * Delivers the <tt>audioLevels</tt> map to whoever's interested. This
- * method is meant for use primarily by the transform engine handling
- * incoming RTP packets (currently <tt>CsrcTransformEngine</tt>).
- *
- * @param audioLevels a array mapping CSRC IDs to audio levels in
- * consecutive elements.
- */
- public void fireConferenceAudioLevelEvent(long[] audioLevels)
- {
- CsrcAudioLevelListener csrcAudioLevelListener
- = this.csrcAudioLevelListener;
-
- if (csrcAudioLevelListener != null)
- csrcAudioLevelListener.audioLevelsReceived(audioLevels);
- }
-
- /**
- * Delivers the <tt>DTMF</tt> tones. This
- * method is meant for use primarily by the transform engine handling
- * incoming RTP packets (currently <tt>DtmfTransformEngine</tt>).
- *
- * @param tone the new tone
- * @param end is end or start of tone.
- */
- public void fireDTMFEvent(DTMFRtpTone tone, boolean end)
- {
- Iterator<DTMFListener> iter = dtmfListeners.iterator();
- DTMFToneEvent ev = new DTMFToneEvent(this, tone);
- while (iter.hasNext())
- {
- DTMFListener listener = iter.next();
- if(end)
- listener.dtmfToneReceptionEnded(ev);
- else
- listener.dtmfToneReceptionStarted(ev);
- }
- }
-
- /**
- * Releases the resources allocated by this instance in the course of its
- * execution and prepares it to be garbage collected.
- *
- * @see MediaStream#close()
- */
- @Override
- public void close()
- {
- super.close();
-
- if(dtmfTransfrmEngine != null)
- {
- dtmfTransfrmEngine = null;
- }
-
- this.audioSystemChangeNotifier.removePropertyChangeListener(this);
- }
-
- /**
- * The priority of the audio is 3, which is meant to be higher than
- * other threads and higher than the video one.
- * @return audio priority.
- */
- @Override
- protected int getPriority()
- {
- return 3;
- }
-
- /**
- * Receives and reacts to property change events: if the selected device
- * (for capture, playback or notifications) has changed, then create or
- * recreate the streams in order to use it.
- * We want to listen to these events, especially for those generated after
- * the audio system has changed.
- *
- * @param evt The event which may contain a audio system change event.
- */
- public void propertyChange(PropertyChangeEvent evt)
- {
- if (sendStreamsAreCreated)
- recreateSendStreams();
- else
- start();
- }
}
diff --git a/src/org/jitsi/impl/neomedia/device/AudioMediaDeviceSession.java b/src/org/jitsi/impl/neomedia/device/AudioMediaDeviceSession.java
index 9bab25bb..df731e0c 100644
--- a/src/org/jitsi/impl/neomedia/device/AudioMediaDeviceSession.java
+++ b/src/org/jitsi/impl/neomedia/device/AudioMediaDeviceSession.java
@@ -57,6 +57,50 @@ protected AudioMediaDeviceSession(AbstractMediaDevice device)
super(device);
}
+ /**
+ * Copies the playback part of a specific <tt>MediaDeviceSession</tt> into
+ * this instance.
+ *
+ * @param deviceSession the <tt>MediaDeviceSession</tt> to copy the playback
+ * part of into this instance
+ */
+ @Override
+ public void copyPlayback(MediaDeviceSession deviceSession)
+ {
+ AudioMediaDeviceSession amds = (AudioMediaDeviceSession) deviceSession;
+
+ setStreamAudioLevelListener(
+ amds.streamAudioLevelEffect.getAudioLevelListener());
+ setLocalUserAudioLevelListener(
+ amds.localUserAudioLevelEffect.getAudioLevelListener());
+ }
+
+ /**
+ * Returns the last audio level that was measured by this device session
+ * for the specified <tt>ssrc</tt>.
+ *
+ * @param ssrc the SSRC ID whose last measured audio level we'd like to
+ * retrieve.
+ *
+ * @return the audio level that was last measured for the specified
+ * <tt>ssrc</tt> or <tt>-1</tt> if no level has been cached for that ID.
+ */
+ public int getLastMeasuredAudioLevel(long ssrc)
+ {
+ return -1;
+ }
+
+ /**
+ * Returns the last audio level that was measured by the underlying
+ * mixer for local user.
+ *
+ * @return the audio level that was last measured for the local user.
+ */
+ public int getLastMeasuredLocalUserAudioLevel()
+ {
+ return -1;
+ }
+
/**
* Called by {@link MediaDeviceSession#playerControllerUpdate(
* ControllerEvent event)} when the player associated with this session's
@@ -219,48 +263,4 @@ public void setStreamAudioLevelListener(SimpleAudioLevelListener listener)
{
this.streamAudioLevelEffect.setAudioLevelListener(listener);
}
-
- /**
- * Returns the last audio level that was measured by this device session
- * for the specified <tt>ssrc</tt>.
- *
- * @param ssrc the SSRC ID whose last measured audio level we'd like to
- * retrieve.
- *
- * @return the audio level that was last measured for the specified
- * <tt>ssrc</tt> or <tt>-1</tt> if no level has been cached for that ID.
- */
- public int getLastMeasuredAudioLevel(long ssrc)
- {
- return -1;
- }
-
- /**
- * Returns the last audio level that was measured by the underlying
- * mixer for local user.
- *
- * @return the audio level that was last measured for the local user.
- */
- public int getLastMeasuredLocalUserAudioLevel()
- {
- return -1;
- }
-
- /**
- * Copies the playback part of a specific <tt>MediaDeviceSession</tt> into
- * this instance.
- *
- * @param deviceSession the <tt>MediaDeviceSession</tt> to copy the playback
- * part of into this instance
- */
- @Override
- public void copyPlayback(MediaDeviceSession deviceSession)
- {
- AudioMediaDeviceSession amds = (AudioMediaDeviceSession) deviceSession;
-
- this.setStreamAudioLevelListener(
- amds.streamAudioLevelEffect.getAudioLevelListener());
- this.setLocalUserAudioLevelListener(
- amds.localUserAudioLevelEffect.getAudioLevelListener());
- }
}
diff --git a/src/org/jitsi/impl/neomedia/device/AudioMixerMediaDevice.java b/src/org/jitsi/impl/neomedia/device/AudioMixerMediaDevice.java
index d4d9a43a..697e8000 100644
--- a/src/org/jitsi/impl/neomedia/device/AudioMixerMediaDevice.java
+++ b/src/org/jitsi/impl/neomedia/device/AudioMixerMediaDevice.java
@@ -1155,8 +1155,10 @@ public void setLocalUserAudioLevelListener(SimpleAudioLevelListener l)
// this happens when holding a conversation, stream is muted
// and when recreated listener is again set
if(!isMute())
+ {
audioMixerMediaDeviceSession.addLocalUserAudioLevelListener(
l);
+ }
}
}
diff --git a/src/org/jitsi/service/neomedia/AudioMediaStream.java b/src/org/jitsi/service/neomedia/AudioMediaStream.java
index e624f531..28ad183b 100644
--- a/src/org/jitsi/service/neomedia/AudioMediaStream.java
+++ b/src/org/jitsi/service/neomedia/AudioMediaStream.java
@@ -14,20 +14,26 @@
* audio streaming.
*
* @author Emil Ivov
+ * @author Lyubomir Marinov
*/
public interface AudioMediaStream
extends MediaStream
{
/**
- * Sets <tt>listener</tt> as the <tt>SimpleAudioLevelListener</tt>
- * registered to receive notifications for changes in the levels of the
- * party that's at the other end of this stream.
+ * Registers a listener that would receive notification events if the
+ * remote party starts sending DTMF tones to us.
*
- * @param listener the <tt>SimpleAudioLevelListener</tt> that we'd like to
- * register or <tt>null</tt> if we want to stop stream audio level
- * measurements.
+ * @param listener the <tt>DTMFListener</tt> that we'd like to register.
*/
- public void setStreamAudioLevelListener(SimpleAudioLevelListener listener);
+ public void addDTMFListener(DTMFListener listener);
+
+ /**
+ * Removes <tt>listener</tt> from the list of <tt>DTMFListener</tt>s
+ * registered to receive events for incoming DTMF tones.
+ *
+ * @param listener the listener that we'd like to unregister
+ */
+ public void removeDTMFListener(DTMFListener listener);
/**
* Registers <tt>listener</tt> as the <tt>CsrcAudioLevelListener</tt> that
@@ -51,6 +57,17 @@ public interface AudioMediaStream
public void setLocalUserAudioLevelListener(
SimpleAudioLevelListener listener);
+ /**
+ * Sets <tt>listener</tt> as the <tt>SimpleAudioLevelListener</tt>
+ * registered to receive notifications for changes in the levels of the
+ * party that's at the other end of this stream.
+ *
+ * @param listener the <tt>SimpleAudioLevelListener</tt> that we'd like to
+ * register or <tt>null</tt> if we want to stop stream audio level
+ * measurements.
+ */
+ public void setStreamAudioLevelListener(SimpleAudioLevelListener listener);
+
/**
* Starts sending the specified <tt>DTMFTone</tt> until the
* <tt>stopSendingDTMF()</tt> method is called (Excepts for INBAND DTMF,
@@ -75,20 +92,4 @@ public void setLocalUserAudioLevelListener(
* @param dtmfMethod the <tt>DTMFMethod</tt> to stop sending.
*/
public void stopSendingDTMF(DTMFMethod dtmfMethod);
-
- /**
- * Registers a listener that would receive notification events if the
- * remote party starts sending DTMF tones to us.
- *
- * @param listener the <tt>DTMFListener</tt> that we'd like to register.
- */
- public void addDTMFListener(DTMFListener listener);
-
- /**
- * Removes <tt>listener</tt> from the list of <tt>DTMFListener</tt>s
- * registered to receive events for incoming DTMF tones.
- *
- * @param listener the listener that we'd like to unregister
- */
- public void removeDTMFListener(DTMFListener listener);
}
--
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