package org.red5.server.stream;
/*
* RED5 Open Source Flash Server - http://www.osflash.org/red5
*
* Copyright (c) 2006-2009 by respective authors (see below). All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any later
* version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import org.red5.server.net.rtmp.event.IRTMPEvent;
import org.red5.server.net.rtmp.message.Constants;
public class StreamTracker implements Constants {
/**
* Last audio flag
*/
private int lastAudio;
/**
* Last video flag
*/
private int lastVideo;
/**
* Last notification flag
*/
private int lastNotify;
/**
* Relative flag
*/
private boolean relative;
/**
* First video flag
*/
private boolean firstVideo;
/**
* First audio flag
*/
private boolean firstAudio;
/**
* First notification flag
*/
private boolean firstNotify;
/** Constructs a new StreamTracker. */
public StreamTracker() {
reset();
}
/**
* Reset state
*/
public void reset() {
lastAudio = 0;
lastVideo = 0;
lastNotify = 0;
firstVideo = true;
firstAudio = true;
firstNotify = true;
}
/**
* RTMP event handler
* @param event RTMP event
* @return Timeframe since last notification (or auido or video packet sending)
*/
public int add(IRTMPEvent event) {
relative = true;
int timestamp = event.getTimestamp();
int tsOut = 0;
switch (event.getDataType()) {
case TYPE_AUDIO_DATA:
if (firstAudio) {
tsOut = event.getTimestamp();
relative = false;
firstAudio = false;
} else {
tsOut = timestamp - lastAudio;
}
lastAudio = timestamp;
break;
case TYPE_VIDEO_DATA:
if (firstVideo) {
tsOut = event.getTimestamp();
relative = false;
firstVideo = false;
} else {
tsOut = timestamp - lastVideo;
}
lastVideo = timestamp;
break;
case TYPE_NOTIFY:
case TYPE_FLEX_STREAM_SEND:
// Fix for APPSERVER-329
// The timer should be set to absolute for
// org.red5.server.stream.consumer.ConnectionConsumer line 122:
// header.setTimerRelative(streamTracker.isRelative());
// TYPE_FLEX_STREAM_SEND is allowed to fall through to TYPE_INVOKE
case TYPE_INVOKE:
if (firstNotify) {
tsOut = event.getTimestamp();
relative = false;
firstNotify = false;
} else {
tsOut = timestamp - lastNotify;
}
lastNotify = timestamp;
break;
default:
// ignore other types
break;
}
return tsOut;
}
/**
* Getter for property 'relative'.
*
* @return Value for property 'relative'.
*/
public boolean isRelative() {
return relative;
}
}