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/*
* $ProjectName$
* $ProjectRevision$
* -----------------------------------------------------------
* $Id$
* -----------------------------------------------------------
*
* $Author$
*
* Description:
*
* Copyright 2002-2003 Tor-Einar Jarnbjo
* -----------------------------------------------------------
*
* Change History
* -----------------------------------------------------------
* $Log$
* Revision 1.1 2005/07/11 15:42:36 hcl
* Songdb java version, source. only 1.5 compatible
*
* Revision 1.1.1.1 2004/04/04 22:09:12 shred
* First Import
*
* Revision 1.1 2003/04/10 19:48:22 jarnbjo
* no message
*
*/
package de.jarnbjo.ogg;
import java.io.*;
import java.net.*;
import java.util.*;
/**
* Implementation of the <code>PhysicalOggStream</code> interface for reading
* an Ogg stream from a URL. This class performs only the necessary caching
* to provide continous playback. Seeking within the stream is not supported.
*/
public class UncachedUrlStream implements PhysicalOggStream {
private boolean closed=false;
private URLConnection source;
private InputStream sourceStream;
private Object drainLock=new Object();
private LinkedList pageCache=new LinkedList();
private long numberOfSamples=-1;
private HashMap logicalStreams=new HashMap();
private LoaderThread loaderThread;
private static final int PAGECACHE_SIZE = 10;
/** Creates an instance of the <code>PhysicalOggStream</code> interface
* suitable for reading an Ogg stream from a URL.
*/
public UncachedUrlStream(URL source) throws OggFormatException, IOException {
this.source=source.openConnection();
this.sourceStream=this.source.getInputStream();
loaderThread=new LoaderThread(sourceStream, pageCache);
new Thread(loaderThread).start();
while(!loaderThread.isBosDone() || pageCache.size()<PAGECACHE_SIZE) {
try {
Thread.sleep(200);
}
catch (InterruptedException ex) {
}
//System.out.print("caching "+pageCache.size()+"/"+PAGECACHE_SIZE+" pages\r");
}
//System.out.println();
}
public Collection getLogicalStreams() {
return logicalStreams.values();
}
public boolean isOpen() {
return !closed;
}
public void close() throws IOException {
closed=true;
sourceStream.close();
}
/*
public long getCacheLength() {
return cacheLength;
}
*/
/*
private OggPage getNextPage() throws EndOfOggStreamException, IOException, OggFormatException {
return getNextPage(false);
}
private OggPage getNextPage(boolean skipData) throws EndOfOggStreamException, IOException, OggFormatException {
return OggPage.create(sourceStream, skipData);
}
*/
public OggPage getOggPage(int index) throws IOException {
while(pageCache.size()==0) {
try {
Thread.sleep(100);
}
catch (InterruptedException ex) {
}
}
synchronized(drainLock) {
//OggPage page=(OggPage)pageCache.getFirst();
//pageCache.removeFirst();
//return page;
return (OggPage)pageCache.removeFirst();
}
}
private LogicalOggStream getLogicalStream(int serialNumber) {
return (LogicalOggStream)logicalStreams.get(new Integer(serialNumber));
}
public void setTime(long granulePosition) throws IOException {
throw new UnsupportedOperationException("Method not supported by this class");
}
public class LoaderThread implements Runnable {
private InputStream source;
private LinkedList pageCache;
private RandomAccessFile drain;
private byte[] memoryCache;
private boolean bosDone=false;
private int pageNumber;
public LoaderThread(InputStream source, LinkedList pageCache) {
this.source=source;
this.pageCache=pageCache;
}
public void run() {
try {
boolean eos=false;
byte[] buffer=new byte[8192];
while(!eos) {
OggPage op=OggPage.create(source);
synchronized (drainLock) {
pageCache.add(op);
}
if(!op.isBos()) {
bosDone=true;
}
if(op.isEos()) {
eos=true;
}
LogicalOggStreamImpl los=(LogicalOggStreamImpl)getLogicalStream(op.getStreamSerialNumber());
if(los==null) {
los=new LogicalOggStreamImpl(UncachedUrlStream.this, op.getStreamSerialNumber());
logicalStreams.put(new Integer(op.getStreamSerialNumber()), los);
los.checkFormat(op);
}
//los.addPageNumberMapping(pageNumber);
//los.addGranulePosition(op.getAbsoluteGranulePosition());
pageNumber++;
while(pageCache.size()>PAGECACHE_SIZE) {
try {
Thread.sleep(200);
}
catch (InterruptedException ex) {
}
}
}
}
catch(EndOfOggStreamException e) {
// ok
}
catch(IOException e) {
e.printStackTrace();
}
}
public boolean isBosDone() {
return bosDone;
}
}
/**
* @return always <code>false</code>
*/
public boolean isSeekable() {
return false;
}
}
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