/*
* @(#)SocketInputStream.java
* Created: 26-Oct-2005
* Version: TODO
* Copyright (c) 2005-2006, University of Manchester All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer. Redistributions in binary
* form must reproduce the above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or other materials
* provided with the distribution. Neither the name of the University of
* Manchester nor the names of its contributors may be used to endorse or
* promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package net.sf.fmj.media.rtp;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.PushSourceStream;
import javax.media.protocol.SourceTransferHandler;
/**
* A DatagramSocket Input Stream Adapter
* @author Andrew G D Rowley
* @version 1-1-alpha3
* @deprecated not used.
*/
@Deprecated
public class SocketInputStream extends Thread implements PushSourceStream {
// The default receive buffer size
private static final int BUFFER_SIZE = 2048;
// The default number of buffers
private static final int NO_BUFFERS = 8;
// The datagram socket
private DatagramSocket socket = null;
// The buffer for the received data
private byte [][] buffer = new byte[NO_BUFFERS][BUFFER_SIZE];
// The size of the buffers
private int [] bufferSize = new int[NO_BUFFERS];
// The number of buffers used
private int buffersUsed = 0;
// The current receive buffer position
private int currentReceive = 0;
// The current send buffer position
private int currentSend = 0;
// True if the receiving is finished
private boolean done = false;
// The transfer handler
private Handler handler = null;
/**
* Creates a new SocketInputStream
* @param socket The socket to handle
*/
public SocketInputStream(DatagramSocket socket) {
this.socket = socket;
}
public synchronized int read(byte[] buffer, int offset, int length) {
if (buffersUsed > 0) {
int maxSize = length;
if (bufferSize[currentSend] < length) {
maxSize = bufferSize[currentSend];
}
System.arraycopy(this.buffer[currentSend], 0, buffer, offset,
maxSize);
currentSend = (currentSend + 1) % this.buffer.length;
buffersUsed--;
return maxSize;
}
return 0;
}
public int getMinimumTransferSize() {
if (buffersUsed > 0) {
return bufferSize[currentSend];
}
return 0;
}
public void setTransferHandler(SourceTransferHandler transferHandler) {
this.handler = new Handler(transferHandler, this);
handler.start();
}
public ContentDescriptor getContentDescriptor() {
return null;
}
public long getContentLength() {
return LENGTH_UNKNOWN;
}
public boolean endOfStream() {
return done && (buffersUsed == 0);
}
public Object[] getControls() {
return new Object[0];
}
public Object getControl(String controlType) {
return null;
}
private int getQueueLength() {
return buffersUsed;
}
@Override
public void run() {
while (!done) {
synchronized (this) {
try {
if (buffersUsed < buffer.length) {
DatagramPacket packet =
new DatagramPacket(buffer[currentReceive],
0, buffer[currentReceive].length);
socket.receive(packet);
bufferSize[currentReceive] = packet.getLength();
currentReceive = (currentReceive + 1) % buffer.length;
buffersUsed++;
if (handler != null) {
handler.dataReady();
}
}
} catch (IOException e) {
// Do Nothing
}
}
}
}
/**
* Stops the socket
*/
public void kill() {
done = true;
socket.close();
}
private class Handler extends Thread {
private SourceTransferHandler handle = null;
private SocketInputStream stream = null;
private boolean dataReady = false;
/**
* Creates a new Handler
* @param handler The handler of data transfer
* @param stream The stream
*/
public Handler(SourceTransferHandler handler,
SocketInputStream stream) {
this.handle = handler;
this.stream = stream;
}
/**
* Notifys the handler that data is ready
*/
public synchronized void dataReady() {
dataReady = true;
notify();
}
@Override
public void run() {
while (!stream.endOfStream()) {
while (!dataReady && (stream.getQueueLength() == 0)) {
synchronized (this) {
try {
wait();
} catch (InterruptedException e) {
// Do Nothing
}
}
}
dataReady = false;
if (!stream.endOfStream()) {
handle.transferData(stream);
}
}
}
}
}