From 9fee0ec4ca0c5b7a334cc29dbb58e76c7a4c736e Mon Sep 17 00:00:00 2001
From: Michiel Van Der Kolk <not.valid@email.address>
Date: Mon, 11 Jul 2005 15:42:37 +0000
Subject: Songdb java version, source. only 1.5 compatible

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657
---
 songdbj/de/jarnbjo/ogg/OggPage.java | 431 ++++++++++++++++++++++++++++++++++++
 1 file changed, 431 insertions(+)
 create mode 100644 songdbj/de/jarnbjo/ogg/OggPage.java

(limited to 'songdbj/de/jarnbjo/ogg/OggPage.java')

diff --git a/songdbj/de/jarnbjo/ogg/OggPage.java b/songdbj/de/jarnbjo/ogg/OggPage.java
new file mode 100644
index 0000000000..cc965cc7a9
--- /dev/null
+++ b/songdbj/de/jarnbjo/ogg/OggPage.java
@@ -0,0 +1,431 @@
+/*
+ * $ProjectName$
+ * $ProjectRevision$
+ * -----------------------------------------------------------
+ * $Id$
+ * -----------------------------------------------------------
+ *
+ * $Author$
+ *
+ * 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 1.3  2003/04/10 19:48:22  jarnbjo
+ * no message
+ *
+ * Revision 1.2  2003/03/31 00:23:04  jarnbjo
+ * no message
+ *
+ * Revision 1.1  2003/03/03 21:02:20  jarnbjo
+ * no message
+ *
+ */
+
+package de.jarnbjo.ogg;
+
+import java.io.*;
+
+import de.jarnbjo.util.io.*;
+
+/**
+ * <p>An instance of this class represents an ogg page read from an ogg file
+ * or network stream. It has no public constructor, but instances can be
+ * created by the <code>create</code> methods, supplying a JMF stream or
+ * a <code>RandomAccessFile</code>
+ * which is positioned at the beginning of an Ogg page.</p>
+ *
+ * <p>Furtheron, the class provides methods for accessing the raw page data,
+ * as well as data attributes like segmenting information, sequence number,
+ * stream serial number, chechsum and wether this page is the beginning or
+ * end of a logical bitstream (BOS, EOS) and if the page data starts with a
+ * continued packet or a fresh data packet.</p>
+ */
+
+public class OggPage {
+
+   private int version;
+   private boolean continued, bos, eos;
+   private long absoluteGranulePosition;
+   private int streamSerialNumber, pageSequenceNumber, pageCheckSum;
+   private int[] segmentOffsets;
+   private int[] segmentLengths;
+   private int totalLength;
+   private byte[] header, segmentTable, data;
+
+   protected OggPage() {
+   }
+
+   private OggPage(
+      int version,
+      boolean continued,
+      boolean bos,
+      boolean eos,
+      long absoluteGranulePosition,
+      int streamSerialNumber,
+      int pageSequenceNumber,
+      int pageCheckSum,
+      int[] segmentOffsets,
+      int[] segmentLengths,
+      int totalLength,
+      byte[] header,
+      byte[] segmentTable,
+      byte[] data) {
+
+      this.version=version;
+      this.continued=continued;
+      this.bos=bos;
+      this.eos=eos;
+      this.absoluteGranulePosition=absoluteGranulePosition;
+      this.streamSerialNumber=streamSerialNumber;
+      this.pageSequenceNumber=pageSequenceNumber;
+      this.pageCheckSum=pageCheckSum;
+      this.segmentOffsets=segmentOffsets;
+      this.segmentLengths=segmentLengths;
+      this.totalLength=totalLength;
+      this.header=header;
+      this.segmentTable=segmentTable;
+      this.data=data;
+   }
+
+	/**
+	 *  this method equals to create(RandomAccessFile source, false)
+	 *
+	 *  @see #create(RandomAccessFile, boolean)
+	 */
+
+   public static OggPage create(RandomAccessFile source) throws IOException, EndOfOggStreamException, OggFormatException  {
+      return create(source, false);
+   }
+
+   /**
+    * This method is called to read data from the current position in the
+    * specified RandomAccessFile and create a new OggPage instance based on the data
+    * read. If the parameter <code>skipData</code> is set to <code>true</code>,
+    * the actual page segments (page data) is skipped and not read into
+    * memory. This mode is useful when scanning through an ogg file to build
+    * a seek table.
+    *
+    * @param source the source from which the ogg page is generated
+    * @param skipData if set to <code>true</code>, the actual page data is not read into memory
+    * @return an ogg page created by reading data from the specified source, starting at the current position
+    * @throws FormatException if the data read from the specified source is not matching the specification for an ogg page
+    * @throws EndOfStreamException if it is not possible to read an entire ogg page from the specified source
+    * @throws IOException if some other I/O error is detected when reading from the source
+    *
+    * @see #create(RandomAccessFile)
+    */
+
+   public static OggPage create(RandomAccessFile source, boolean skipData) throws IOException, EndOfOggStreamException, OggFormatException  {
+      return create((Object)source, skipData);
+   }
+
+	/**
+	 *  this method equals to create(InputStream source, false)
+	 *
+	 *  @see #create(InputStream, boolean)
+	 */
+
+   public static OggPage create(InputStream source) throws IOException, EndOfOggStreamException, OggFormatException  {
+      return create(source, false);
+   }
+
+   /**
+    * This method is called to read data from the current position in the
+    * specified InpuStream and create a new OggPage instance based on the data
+    * read. If the parameter <code>skipData</code> is set to <code>true</code>,
+    * the actual page segments (page data) is skipped and not read into
+    * memory. This mode is useful when scanning through an ogg file to build
+    * a seek table.
+    *
+    * @param source the source from which the ogg page is generated
+    * @param skipData if set to <code>true</code>, the actual page data is not read into memory
+    * @return an ogg page created by reading data from the specified source, starting at the current position
+    * @throws FormatException if the data read from the specified source is not matching the specification for an ogg page
+    * @throws EndOfStreamException if it is not possible to read an entire ogg page from the specified source
+    * @throws IOException if some other I/O error is detected when reading from the source
+    *
+    * @see #create(InputStream)
+    */
+
+   public static OggPage create(InputStream source, boolean skipData) throws IOException, EndOfOggStreamException, OggFormatException  {
+      return create((Object)source, skipData);
+   }
+
+	/**
+	 *  this method equals to create(byte[] source, false)
+	 *
+	 *  @see #create(byte[], boolean)
+	 */
+
+   public static OggPage create(byte[] source) throws IOException, EndOfOggStreamException, OggFormatException  {
+      return create(source, false);
+   }
+
+   /**
+    * This method is called to
+    * create a new OggPage instance based on the specified byte array.
+    *
+    * @param source the source from which the ogg page is generated
+    * @param skipData if set to <code>true</code>, the actual page data is not read into memory
+    * @return an ogg page created by reading data from the specified source, starting at the current position
+    * @throws FormatException if the data read from the specified source is not matching the specification for an ogg page
+    * @throws EndOfStreamException if it is not possible to read an entire ogg page from the specified source
+    * @throws IOException if some other I/O error is detected when reading from the source
+    *
+    * @see #create(byte[])
+    */
+
+   public static OggPage create(byte[] source, boolean skipData) throws IOException, EndOfOggStreamException, OggFormatException  {
+      return create((Object)source, skipData);
+   }
+
+   private static OggPage create(Object source, boolean skipData) throws IOException, EndOfOggStreamException, OggFormatException  {
+
+      try {
+         int sourceOffset=27;
+
+         byte[] header=new byte[27];
+         if(source instanceof RandomAccessFile) {
+            RandomAccessFile raf=(RandomAccessFile)source;
+            if(raf.getFilePointer()==raf.length()) {
+               return null;
+            }
+            raf.readFully(header);
+         }
+         else if(source instanceof InputStream) {
+            readFully((InputStream)source, header);
+         }
+         else if(source instanceof byte[]) {
+            System.arraycopy((byte[])source, 0, header, 0, 27);
+         }
+
+         BitInputStream bdSource=new ByteArrayBitInputStream(header);
+
+         int capture=bdSource.getInt(32);
+
+         if(capture!=0x5367674f) {
+            //throw new FormatException("Ogg page does not start with 'OggS' (0x4f676753)");
+
+            /*
+            ** This condition is IMHO an error, but older Ogg files often contain
+            ** pages with a different capture than OggS. I am not sure how to
+            ** manage these pages, but the decoder seems to work properly, if
+            ** the incorrect capture is simply ignored.
+            */
+
+            String cs=Integer.toHexString(capture);
+            while(cs.length()<8) {
+               cs="0"+cs;
+            }
+            cs=cs.substring(6, 8)+cs.substring(4, 6)+cs.substring(2, 4)+cs.substring(0, 2);
+            char c1=(char)(Integer.valueOf(cs.substring(0, 2), 16).intValue());
+            char c2=(char)(Integer.valueOf(cs.substring(2, 4), 16).intValue());
+            char c3=(char)(Integer.valueOf(cs.substring(4, 6), 16).intValue());
+            char c4=(char)(Integer.valueOf(cs.substring(6, 8), 16).intValue());
+            System.out.println("Ogg packet header is 0x"+cs+" ("+c1+c2+c3+c4+"), should be 0x4f676753 (OggS)");
+         }
+
+         int version=bdSource.getInt(8);
+         byte tmp=(byte)bdSource.getInt(8);
+         boolean bf1=(tmp&1)!=0;
+         boolean bos=(tmp&2)!=0;
+         boolean eos=(tmp&4)!=0;
+         long absoluteGranulePosition=bdSource.getLong(64);
+         int streamSerialNumber=bdSource.getInt(32);
+         int pageSequenceNumber=bdSource.getInt(32);
+         int pageCheckSum=bdSource.getInt(32);
+         int pageSegments=bdSource.getInt(8);
+
+         //System.out.println("OggPage: "+streamSerialNumber+" / "+absoluteGranulePosition+" / "+pageSequenceNumber);
+
+         int[] segmentOffsets=new int[pageSegments];
+         int[] segmentLengths=new int[pageSegments];
+         int totalLength=0;
+
+         byte[] segmentTable=new byte[pageSegments];
+         byte[] tmpBuf=new byte[1];
+
+         for(int i=0; i<pageSegments; i++) {
+            int l=0;
+            if(source instanceof RandomAccessFile) {
+               l=((int)((RandomAccessFile)source).readByte()&0xff);
+            }
+            else if(source instanceof InputStream) {
+               l=(int)((InputStream)source).read();
+            }
+            else if(source instanceof byte[]) {
+               l=(int)((byte[])source)[sourceOffset++];
+               l&=255;
+            }
+            segmentTable[i]=(byte)l;
+            segmentLengths[i]=l;
+            segmentOffsets[i]=totalLength;
+            totalLength+=l;
+         }
+
+         byte[] data=null;
+
+         if(!skipData) {
+
+            //System.out.println("createPage: "+absoluteGranulePosition*1000/44100);
+
+            data=new byte[totalLength];
+            //source.read(data, 0, totalLength);
+            if(source instanceof RandomAccessFile) {
+               ((RandomAccessFile)source).readFully(data);
+            }
+            else if(source instanceof InputStream) {
+               readFully((InputStream)source, data);
+            }
+            else if(source instanceof byte[]) {
+               System.arraycopy(source, sourceOffset, data, 0, totalLength);
+            }
+         }
+
+         return new OggPage(version, bf1, bos, eos, absoluteGranulePosition, streamSerialNumber, pageSequenceNumber, pageCheckSum, segmentOffsets, segmentLengths, totalLength, header, segmentTable, data);
+      }
+      catch(EOFException e) {
+         throw new EndOfOggStreamException();
+      }
+   }
+
+   private static void readFully(InputStream source, byte[] buffer) throws IOException {
+      int total=0;
+      while(total<buffer.length) {
+         int read=source.read(buffer, total, buffer.length-total);
+         if(read==-1) {
+            throw new EndOfOggStreamException();
+         }
+         total+=read;
+      }
+   }
+
+   /**
+    * Returns the absolute granule position of the last complete
+    * packet contained in this Ogg page, or -1 if the page contains a single
+    * packet, which is not completed on this page. For pages containing Vorbis
+    * data, this value is the sample index within the Vorbis stream. The Vorbis
+    * stream does not necessarily start with sample index 0.
+    *
+    * @return the absolute granule position of the last packet completed on
+    *         this page
+    */
+
+
+   public long getAbsoluteGranulePosition() {
+      return absoluteGranulePosition;
+   }
+
+   /**
+    * Returns the stream serial number of this ogg page.
+    *
+    * @return this page's serial number
+    */
+
+   public int getStreamSerialNumber() {
+      return streamSerialNumber;
+   }
+
+   /**
+    * Return the sequnce number of this ogg page.
+    *
+    * @return this page's sequence number
+    */
+
+   public int getPageSequenceNumber() {
+      return pageSequenceNumber;
+   }
+
+   /**
+    * Return the check sum of this ogg page.
+    *
+    * @return this page's check sum
+    */
+
+   public int getPageCheckSum() {
+      return pageCheckSum;
+   }
+
+   /**
+    * @return the total number of bytes in the page data
+    */
+
+
+   public int getTotalLength() {
+      if(data!=null) {
+         return 27+segmentTable.length+data.length;
+      }
+      else {
+         return totalLength;
+      }
+   }
+
+   /**
+    * @return a ByteBuffer containing the page data
+    */
+
+
+   public byte[] getData() {
+      return data;
+   }
+
+   public byte[] getHeader() {
+      return header;
+   }
+
+   public byte[] getSegmentTable() {
+      return segmentTable;
+   }
+
+   public int[] getSegmentOffsets() {
+      return segmentOffsets;
+   }
+
+   public int[] getSegmentLengths() {
+      return segmentLengths;
+   }
+
+   /**
+    * @return <code>true</code> if this page begins with a continued packet
+    */
+
+   public boolean isContinued() {
+      return continued;
+   }
+
+   /**
+    * @return <code>true</code> if this page begins with a fresh packet
+    */
+
+   public boolean isFresh() {
+      return !continued;
+   }
+
+   /**
+    * @return <code>true</code> if this page is the beginning of a logical stream
+    */
+
+   public boolean isBos() {
+      return bos;
+   }
+
+   /**
+    * @return <code>true</code> if this page is the end of a logical stream
+    */
+
+   public boolean isEos() {
+      return eos;
+   }
+
+}
\ No newline at end of file
-- 
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