Splitting out songdbj

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11953 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 0 insertions, 655 deletions

diff --git a/songdbj/javazoom/jl/decoder/Bitstream.java b/songdbj/javazoom/jl/decoder/Bitstream.java
deleted file mode 100644
index cebbd5b..0000000
--- a/songdbj/javazoom/jl/decoder/Bitstream.java
+++ /dev/null
@@ -1,655 +0,0 @@
-/*
- * 11/19/04  1.0 moved to LGPL.
- * 
- * 11/17/04	 Uncomplete frames discarded. E.B, javalayer@javazoom.net 
- *
- * 12/05/03	 ID3v2 tag returned. E.B, javalayer@javazoom.net 
- *
- * 12/12/99	 Based on Ibitstream. Exceptions thrown on errors,
- *			 Temporary removed seek functionality. mdm@techie.com
- *
- * 02/12/99 : Java Conversion by E.B , javalayer@javazoom.net
- *
- * 04/14/97 : Added function prototypes for new syncing and seeking
- * mechanisms. Also made this file portable. Changes made by Jeff Tsay
- *
- *  @(#) ibitstream.h 1.5, last edit: 6/15/94 16:55:34
- *  @(#) Copyright (C) 1993, 1994 Tobias Bading (bading@cs.tu-berlin.de)
- *  @(#) Berlin University of Technology
- *-----------------------------------------------------------------------
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU Library General Public License as published
- *   by the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program 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 Library General Public License for more details.
- *
- *   You should have received a copy of the GNU Library General Public
- *   License along with this program; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *----------------------------------------------------------------------
- */
-
-package javazoom.jl.decoder;
-
-import java.io.BufferedInputStream;
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.PushbackInputStream;
-
-
-/**
- * The <code>Bistream</code> class is responsible for parsing
- * an MPEG audio bitstream.
- *
- * <b>REVIEW:</b> much of the parsing currently occurs in the
- * various decoders. This should be moved into this class and associated
- * inner classes.
- */
-public final class Bitstream implements BitstreamErrors
-{
-	/**
-	 * Synchronization control constant for the initial
-	 * synchronization to the start of a frame.
-	 */
-	static byte		INITIAL_SYNC = 0;
-
-	/**
-	 * Synchronization control constant for non-initial frame
-	 * synchronizations.
-	 */
-	static byte		STRICT_SYNC = 1;
-
-	// max. 1730 bytes per frame: 144 * 384kbit/s / 32000 Hz + 2 Bytes CRC
-	/**
-	 * Maximum size of the frame buffer.
-	 */
-	private static final int	BUFFER_INT_SIZE = 433;
-
-	/**
-	 * The frame buffer that holds the data for the current frame.
-	 */
-	private final int[]		framebuffer = new int[BUFFER_INT_SIZE];
-
-	/**
-	 * Number of valid bytes in the frame buffer.
-	 */
-	private int				framesize;
-
-	/**
-	 * The bytes read from the stream.
-	 */
-	private byte[]			frame_bytes = new byte[BUFFER_INT_SIZE*4];
-
-	/**
-	 * Index into <code>framebuffer</code> where the next bits are
-	 * retrieved.
-	 */
-	private int				wordpointer;
-
-	/**
-	 * Number (0-31, from MSB to LSB) of next bit for get_bits()
-	 */
-	private int				bitindex;
-
-	/**
-	 * The current specified syncword
-	 */
-	private int				syncword;
-	
-	/**
-	 * Audio header position in stream.
-	 */
-	private int				header_pos = 0;
-
-	/**
-	 *
-	 */
-	private boolean			single_ch_mode;
-  //private int 			current_frame_number;
-  //private int				last_frame_number;
-
-	private final int		bitmask[] = {0,	// dummy
-	 0x00000001, 0x00000003, 0x00000007, 0x0000000F,
-	 0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
-	 0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
-	 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF,
-     0x0001FFFF };
-
-	private final PushbackInputStream	source;
-
-	private final Header			header = new Header();
-
-	private final byte				syncbuf[] = new byte[4];
-
-	private Crc16[]					crc = new Crc16[1];
-
-	private byte[]					rawid3v2 = null;
-
-	private boolean					firstframe = true;
-
-
-	/**
-	 * Construct a IBitstream that reads data from a
-	 * given InputStream.
-	 *
-	 * @param in	The InputStream to read from.
-	 */
-	public Bitstream(InputStream in)
-	{
-		if (in==null) throw new NullPointerException("in");
-		in = new BufferedInputStream(in);		
-		loadID3v2(in);
-		firstframe = true;
-		//source = new PushbackInputStream(in, 1024);
-		source = new PushbackInputStream(in, BUFFER_INT_SIZE*4);
-		
-		closeFrame();
-		//current_frame_number = -1;
-		//last_frame_number = -1;
-	}
-
-	/**
-	 * Return position of the first audio header.
-	 * @return size of ID3v2 tag frames.
-	 */
-	public int header_pos()
-	{
-		return header_pos;
-	}
-	
-	/**
-	 * Load ID3v2 frames.
-	 * @param in MP3 InputStream.
-	 * @author JavaZOOM
-	 */
-	private void loadID3v2(InputStream in)
-	{		
-		int size = -1;
-		try
-		{
-			// Read ID3v2 header (10 bytes).
-			in.mark(10);			
-			size = readID3v2Header(in);
-			header_pos = size;			
-		}
-		catch (IOException e)
-		{}
-		finally
-		{
-			try
-			{
-				// Unread ID3v2 header (10 bytes).
-				in.reset();
-			}
-			catch (IOException e)
-			{}
-		}
-		// Load ID3v2 tags.
-		try
-		{
-			if (size > 0)
-			{
-				rawid3v2 = new byte[size];
-				in.read(rawid3v2,0,rawid3v2.length);
-			}			
-		}
-		catch (IOException e)
-		{}
-	}
-	
-	/**
-	 * Parse ID3v2 tag header to find out size of ID3v2 frames. 
-	 * @param in MP3 InputStream
-	 * @return size of ID3v2 frames + header
-	 * @throws IOException
-	 * @author JavaZOOM
-	 */
-	private int readID3v2Header(InputStream in) throws IOException
-	{		
-		byte[] id3header = new byte[4];
-		int size = -10;
-		in.read(id3header,0,3);
-		// Look for ID3v2
-		if ( (id3header[0]=='I') && (id3header[1]=='D') && (id3header[2]=='3'))
-		{
-			in.read(id3header,0,3);
-			int majorVersion = id3header[0];
-			int revision = id3header[1];
-			in.read(id3header,0,4);
-			size = (int) (id3header[0] << 21) + (id3header[1] << 14) + (id3header[2] << 7) + (id3header[3]);
-		}
-		return (size+10);
-	}
-	
-	/**
-	 * Return raw ID3v2 frames + header.
-	 * @return ID3v2 InputStream or null if ID3v2 frames are not available.
-	 */
-	public InputStream getRawID3v2()
-	{
-		if (rawid3v2 == null) return null;
-		else
-		{
-			ByteArrayInputStream bain = new ByteArrayInputStream(rawid3v2);		
-			return bain;
-		}
-	}
-
-	/**
-	 * Close the Bitstream.
-	 * @throws BitstreamException
-	 */
-	public void close() throws BitstreamException
-	{
-		try
-		{
-			source.close();
-		}
-		catch (IOException ex)
-		{
-			throw newBitstreamException(STREAM_ERROR, ex);
-		}
-	}
-
-	/**
-	 * Reads and parses the next frame from the input source.
-	 * @return the Header describing details of the frame read,
-	 *	or null if the end of the stream has been reached.
-	 */
-	public Header readFrame() throws BitstreamException
-	{
-		Header result = null;
-		try
-		{
-			result = readNextFrame();
-			// E.B, Parse VBR (if any) first frame.
-			if (firstframe == true)
-			{
-				result.parseVBR(frame_bytes);
-				firstframe = false;
-			}			
-		}
-		catch (BitstreamException ex)
-		{
-			if ((ex.getErrorCode()==INVALIDFRAME))
-			{
-				// Try to skip this frame.
-				//System.out.println("INVALIDFRAME");
-				try
-				{
-					closeFrame();
-					result = readNextFrame();
-				}
-				catch (BitstreamException e)
-				{
-					if ((e.getErrorCode()!=STREAM_EOF))
-					{
-						// wrap original exception so stack trace is maintained.
-						throw newBitstreamException(e.getErrorCode(), e);
-					}
-				}
-			}
-			else if ((ex.getErrorCode()!=STREAM_EOF))
-			{
-				// wrap original exception so stack trace is maintained.
-				throw newBitstreamException(ex.getErrorCode(), ex);
-			}
-		}
-		return result;
-	}
-
-	/**
-	 * Read next MP3 frame.
-	 * @return MP3 frame header.
-	 * @throws BitstreamException
-	 */
-	private Header readNextFrame() throws BitstreamException
-	{
-		if (framesize == -1)
-		{
-			nextFrame();
-		}
-		return header;
-	}
-
-
-	/**
-	 * Read next MP3 frame.
-	 * @throws BitstreamException
-	 */
-	private void nextFrame() throws BitstreamException
-	{
-		// entire frame is read by the header class.
-		header.read_header(this, crc);
-	}
-
-	/**
-	 * Unreads the bytes read from the frame.
-	 * @throws BitstreamException
-	 */
-	// REVIEW: add new error codes for this.
-	public void unreadFrame() throws BitstreamException
-	{
-		if (wordpointer==-1 && bitindex==-1 && (framesize>0))
-		{
-			try
-			{
-				source.unread(frame_bytes, 0, framesize);
-			}
-			catch (IOException ex)
-			{
-				throw newBitstreamException(STREAM_ERROR);
-			}
-		}
-	}
-
-	/**
-	 * Close MP3 frame.
-	 */
-	public void closeFrame()
-	{
-		framesize = -1;
-		wordpointer = -1;
-		bitindex = -1;
-	}
-
-	/**
-	 * Determines if the next 4 bytes of the stream represent a
-	 * frame header.
-	 */
-	public boolean isSyncCurrentPosition(int syncmode) throws BitstreamException
-	{
-		int read = readBytes(syncbuf, 0, 4);
-		int headerstring = ((syncbuf[0] << 24) & 0xFF000000) | ((syncbuf[1] << 16) & 0x00FF0000) | ((syncbuf[2] << 8) & 0x0000FF00) | ((syncbuf[3] << 0) & 0x000000FF);
-
-		try
-		{
-			source.unread(syncbuf, 0, read);
-		}
-		catch (IOException ex)
-		{
-		}
-
-		boolean sync = false;
-		switch (read)
-		{
-			case 0:
-				sync = true;
-				break;
-			case 4:
-				sync = isSyncMark(headerstring, syncmode, syncword);
-				break;
-		}
-
-		return sync;
-	}
-
-
-	// REVIEW: this class should provide inner classes to
-	// parse the frame contents. Eventually, readBits will
-	// be removed.
-	public int readBits(int n)
-	{
-		return get_bits(n);
-	}
-
-	public int readCheckedBits(int n)
-	{
-		// REVIEW: implement CRC check.
-		return get_bits(n);
-	}
-
-	protected BitstreamException newBitstreamException(int errorcode)
-	{
-		return new BitstreamException(errorcode, null);
-	}
-	protected BitstreamException newBitstreamException(int errorcode, Throwable throwable)
-	{
-		return new BitstreamException(errorcode, throwable);
-	}
-
-  /**
-   * Get next 32 bits from bitstream.
-   * They are stored in the headerstring.
-   * syncmod allows Synchro flag ID
-   * The returned value is False at the end of stream.
-   */
-
-	int syncHeader(byte syncmode) throws BitstreamException
-	{
-		boolean sync;
-		int headerstring;
-		// read additional 2 bytes
-		int bytesRead = readBytes(syncbuf, 0, 3);
-
-		if (bytesRead!=3) throw newBitstreamException(STREAM_EOF, null);
-
-		headerstring = ((syncbuf[0] << 16) & 0x00FF0000) | ((syncbuf[1] << 8) & 0x0000FF00) | ((syncbuf[2] << 0) & 0x000000FF);
-
-		do
-		{
-			headerstring <<= 8;
-
-			if (readBytes(syncbuf, 3, 1)!=1)
-				throw newBitstreamException(STREAM_EOF, null);
-
-			headerstring |= (syncbuf[3] & 0x000000FF);
-
-			sync = isSyncMark(headerstring, syncmode, syncword);
-		}
-		while (!sync);
-
-		//current_frame_number++;
-		//if (last_frame_number < current_frame_number) last_frame_number = current_frame_number;
-
-		return headerstring;
-	}
-
-	public boolean isSyncMark(int headerstring, int syncmode, int word)
-	{
-		boolean sync = false;
-
-		if (syncmode == INITIAL_SYNC)
-		{
-			//sync =  ((headerstring & 0xFFF00000) == 0xFFF00000);
-			sync =  ((headerstring & 0xFFE00000) == 0xFFE00000);	// SZD: MPEG 2.5
-		}
-		else
-		{
-			sync =  ((headerstring & 0xFFF80C00) == word) &&
-			    (((headerstring & 0x000000C0) == 0x000000C0) == single_ch_mode);
-		}
-
-		// filter out invalid sample rate
-		if (sync)
-			sync = (((headerstring >>> 10) & 3)!=3);
-		// filter out invalid layer
-		if (sync)
-			sync = (((headerstring >>> 17) & 3)!=0);
-		// filter out invalid version
-		if (sync)
-			sync = (((headerstring >>> 19) & 3)!=1);
-
-		return sync;
-	}
-
-	/**
-	 * Reads the data for the next frame. The frame is not parsed
-	 * until parse frame is called.
-	 */
-	int read_frame_data(int bytesize) throws BitstreamException
-	{
- 		int	numread = 0;
-		numread = readFully(frame_bytes, 0, bytesize);
-		framesize = bytesize;
-		wordpointer = -1;
-	    bitindex = -1;
-	    return numread;
-	}
-
-  /**
-   * Parses the data previously read with read_frame_data().
-   */
-  void parse_frame() throws BitstreamException
-  {
-	// Convert Bytes read to int
-	int	b=0;
-	byte[] byteread = frame_bytes;
-	int bytesize = framesize;
-
-	// Check ID3v1 TAG (True only if last frame).
-	//for (int t=0;t<(byteread.length)-2;t++)
-	//{
-	//	if ((byteread[t]=='T') && (byteread[t+1]=='A') && (byteread[t+2]=='G'))
-	//	{
-	//		System.out.println("ID3v1 detected at offset "+t);
-	//		throw newBitstreamException(INVALIDFRAME, null);
-	//	} 	
-	//}
-	
-	for (int k=0;k<bytesize;k=k+4)
-	{
-		int convert = 0;
-		byte b0 = 0;
-		byte b1 = 0;
-		byte b2 = 0;
-		byte b3 = 0;
-		b0 = byteread[k];
-		if (k+1<bytesize) b1 = byteread[k+1];
-		if (k+2<bytesize) b2 = byteread[k+2];
-		if (k+3<bytesize) b3 = byteread[k+3];
-		framebuffer[b++] = ((b0 << 24) &0xFF000000) | ((b1 << 16) & 0x00FF0000) | ((b2 << 8) & 0x0000FF00) | (b3 & 0x000000FF);
-	}
-	wordpointer = 0;
-    bitindex = 0;
-  }
-
-  /**
-   * Read bits from buffer into the lower bits of an unsigned int.
-   * The LSB contains the latest read bit of the stream.
-   * (1 <= number_of_bits <= 16)
-   */
-  public int get_bits(int number_of_bits)
-  {
-  	int				returnvalue = 0;
-  	int 			sum = bitindex + number_of_bits;
-
-	// E.B
-	// There is a problem here, wordpointer could be -1 ?!
-    if (wordpointer < 0) wordpointer = 0;
-    // E.B : End.
-
-  	if (sum <= 32)
-  	{
-	   // all bits contained in *wordpointer
-	   returnvalue = (framebuffer[wordpointer] >>> (32 - sum)) & bitmask[number_of_bits];
-	   // returnvalue = (wordpointer[0] >> (32 - sum)) & bitmask[number_of_bits];
-	   if ((bitindex += number_of_bits) == 32)
-	   {
-		 bitindex = 0;
-		 wordpointer++; // added by me!
-	   }
-	   return returnvalue;
-    }
-
-    // E.B : Check that ?
-    //((short[])&returnvalue)[0] = ((short[])wordpointer + 1)[0];
-    //wordpointer++; // Added by me!
-    //((short[])&returnvalue + 1)[0] = ((short[])wordpointer)[0];
-	int Right = (framebuffer[wordpointer] & 0x0000FFFF);
-	wordpointer++;
-	int Left = (framebuffer[wordpointer] & 0xFFFF0000);
-	returnvalue = ((Right << 16) & 0xFFFF0000) | ((Left >>> 16)& 0x0000FFFF);
-
-    returnvalue >>>= 48 - sum;	// returnvalue >>= 16 - (number_of_bits - (32 - bitindex))
-    returnvalue &= bitmask[number_of_bits];
-    bitindex = sum - 32;
-    return returnvalue;
-}
-
-	/**
-	 * Set the word we want to sync the header to.
-	 * In Big-Endian byte order
-	 */
-	void set_syncword(int syncword0)
-	{
-		syncword = syncword0 & 0xFFFFFF3F;
-		single_ch_mode = ((syncword0 & 0x000000C0) == 0x000000C0);
-	}
-	/**
-	 * Reads the exact number of bytes from the source
-	 * input stream into a byte array.
-	 *
-	 * @param b		The byte array to read the specified number
-	 *				of bytes into.
-	 * @param offs	The index in the array where the first byte
-	 *				read should be stored.
-	 * @param len	the number of bytes to read.
-	 *
-	 * @exception BitstreamException is thrown if the specified
-	 *		number of bytes could not be read from the stream.
-	 */
-	private int readFully(byte[] b, int offs, int len)
-		throws BitstreamException
-	{		
-		int nRead = 0;
-		try
-		{
-			while (len > 0)
-			{
-				int bytesread = source.read(b, offs, len);
-				if (bytesread == -1)
-				{
-					while (len-->0)
-					{
-						b[offs++] = 0;
-					}
-					break;
-					//throw newBitstreamException(UNEXPECTED_EOF, new EOFException());
-				}
-				nRead = nRead + bytesread;
-				offs += bytesread;
-				len -= bytesread;
-			}
-		}
-		catch (IOException ex)
-		{
-			throw newBitstreamException(STREAM_ERROR, ex);
-		}
-		return nRead;
-	}
-
-	/**
-	 * Simlar to readFully, but doesn't throw exception when
-	 * EOF is reached.
-	 */
-	private int readBytes(byte[] b, int offs, int len)
-		throws BitstreamException
-	{
-		int totalBytesRead = 0;
-		try
-		{
-			while (len > 0)
-			{
-				int bytesread = source.read(b, offs, len);
-				if (bytesread == -1)
-				{
-					break;
-				}
-				totalBytesRead += bytesread;
-				offs += bytesread;
-				len -= bytesread;
-			}
-		}
-		catch (IOException ex)
-		{
-			throw newBitstreamException(STREAM_ERROR, ex);
-		}
-		return totalBytesRead;
-	}
-}