1 files changed, 207 insertions, 0 deletions

diff --git a/songdbj/de/jarnbjo/ogg/UncachedUrlStream.java b/songdbj/de/jarnbjo/ogg/UncachedUrlStream.java
new file mode 100644
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+++ b/songdbj/de/jarnbjo/ogg/UncachedUrlStream.java
@@ -0,0 +1,207 @@
+/*
+ * $ProjectName$
+ * $ProjectRevision$
+ * -----------------------------------------------------------
+ * $Id$
+ * -----------------------------------------------------------
+ *
+ * $Author$
+ *
+ * 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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