/**
* Notifies this <tt>Conference</tt> that the ordered list of <tt>Endpoint</tt>s of {@link
* #speechActivity} i.e. the dominant speaker history has changed.
*
* <p>This instance notifies the video <tt>Channel</tt>s about the change so that they may update
* their last-n lists and report to this instance which <tt>Endpoint</tt>s are to be asked for
* video keyframes.
*/
private void speechActivityEndpointsChanged() {
List<Endpoint> endpoints = null;
for (Content content : getContents()) {
if (MediaType.VIDEO.equals(content.getMediaType())) {
Set<Endpoint> endpointsToAskForKeyframes = null;
endpoints = speechActivity.getEndpoints();
for (Channel channel : content.getChannels()) {
if (!(channel instanceof RtpChannel)) continue;
RtpChannel rtpChannel = (RtpChannel) channel;
List<Endpoint> channelEndpointsToAskForKeyframes =
rtpChannel.speechActivityEndpointsChanged(endpoints);
if ((channelEndpointsToAskForKeyframes != null)
&& !channelEndpointsToAskForKeyframes.isEmpty()) {
if (endpointsToAskForKeyframes == null) {
endpointsToAskForKeyframes = new HashSet<>();
}
endpointsToAskForKeyframes.addAll(channelEndpointsToAskForKeyframes);
}
}
if ((endpointsToAskForKeyframes != null) && !endpointsToAskForKeyframes.isEmpty()) {
content.askForKeyframes(endpointsToAskForKeyframes);
}
}
}
}
/**
* Adds <tt>listener</tt> to the list of {@link CapsVerListener}s that we notify when new features
* occur and the version hash needs to be regenerated. The method would also notify
* <tt>listener</tt> if our current caps version has been generated and is different than
* <tt>null</tt>.
*
* @param listener the {@link CapsVerListener} we'd like to register.
*/
public void addCapsVerListener(CapsVerListener listener) {
synchronized (capsVerListeners) {
if (capsVerListeners.contains(listener)) return;
capsVerListeners.add(listener);
if (currentCapsVersion != null) listener.capsVerUpdated(currentCapsVersion);
}
}
/**
* Removes <tt>listener</tt> from the list of currently registered {@link CapsVerListener}s.
*
* @param listener the {@link CapsVerListener} we'd like to unregister.
*/
public void removeCapsVerListener(CapsVerListener listener) {
synchronized (capsVerListeners) {
capsVerListeners.remove(listener);
}
}