Songdb java version, source. only 1.5 compatible

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 762 insertions, 0 deletions

diff --git a/songdbj/javazoom/jl/decoder/Header.java b/songdbj/javazoom/jl/decoder/Header.java
new file mode 100644
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--- /dev/null
+++ b/songdbj/javazoom/jl/decoder/Header.java
@@ -0,0 +1,762 @@
+/*
+ * 11/19/04 : 1.0 moved to LGPL.
+ *            VBRI header support added, E.B javalayer@javazoom.net
+ * 
+ * 12/04/03 : VBR (XING) header support added, E.B javalayer@javazoom.net
+ *
+ * 02/13/99 : Java Conversion by JavaZOOM , E.B javalayer@javazoom.net
+ *
+ * Declarations for MPEG header class
+ * A few layer III, MPEG-2 LSF, and seeking modifications made by Jeff Tsay.
+ * Last modified : 04/19/97
+ *
+ *  @(#) header.h 1.7, last edit: 6/15/94 16:55:33
+ *  @(#) 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;
+
+/**
+ * Class for extracting information from a frame header.
+ */
+public final class Header
+{
+	public  static final int[][]	frequencies =
+						{{22050, 24000, 16000, 1},
+						{44100, 48000, 32000, 1},
+						{11025, 12000, 8000, 1}};	// SZD: MPEG25
+
+	/**
+	 * Constant for MPEG-2 LSF version
+	 */
+	public static final int		MPEG2_LSF = 0;
+	public static final int		MPEG25_LSF = 2;	// SZD
+
+	/**
+	 * Constant for MPEG-1 version
+	 */
+	public static final int		MPEG1 = 1;
+
+	public static final int		STEREO = 0;
+	public static final int		JOINT_STEREO = 1;
+	public static final int		DUAL_CHANNEL = 2;
+	public static final int		SINGLE_CHANNEL = 3;
+	public static final int		FOURTYFOUR_POINT_ONE = 0;
+	public static final int		FOURTYEIGHT=1;
+	public static final int		THIRTYTWO=2;
+
+	private int				h_layer, h_protection_bit, h_bitrate_index,
+	  						h_padding_bit, h_mode_extension;
+	private int				h_version;
+	private int				h_mode;
+	private int				h_sample_frequency;
+	private int				h_number_of_subbands, h_intensity_stereo_bound;
+	private boolean			h_copyright, h_original;
+	// VBR support added by E.B
+	private double[] 		h_vbr_time_per_frame = {-1, 384, 1152, 1152};
+	private boolean			h_vbr;
+	private int				h_vbr_frames;
+	private int				h_vbr_scale;
+	private int				h_vbr_bytes;
+	private byte[]			h_vbr_toc;
+	
+	private byte			syncmode = Bitstream.INITIAL_SYNC;
+	private Crc16			crc;
+
+	public short			checksum;
+	public int				framesize;
+	public int				nSlots;
+
+	private int				_headerstring = -1; // E.B
+
+	Header()
+	{
+	}
+	public String toString()
+	{
+		StringBuffer buffer = new StringBuffer(200);
+		buffer.append("Layer ");
+		buffer.append(layer_string());
+		buffer.append(" frame ");
+		buffer.append(mode_string());
+		buffer.append(' ');
+		buffer.append(version_string());
+		if (!checksums())
+			buffer.append(" no");
+		buffer.append(" checksums");
+		buffer.append(' ');
+		buffer.append(sample_frequency_string());
+		buffer.append(',');
+		buffer.append(' ');
+		buffer.append(bitrate_string());
+
+		String s =  buffer.toString();
+		return s;
+	}
+
+	/**
+	 * Read a 32-bit header from the bitstream.
+	 */
+	void read_header(Bitstream stream, Crc16[] crcp) throws BitstreamException
+	{
+		int headerstring;
+		int channel_bitrate;
+		boolean sync = false;
+		do
+		{
+			headerstring = stream.syncHeader(syncmode);
+			_headerstring = headerstring; // E.B
+			if (syncmode == Bitstream.INITIAL_SYNC)
+			{
+				h_version = ((headerstring >>> 19) & 1);
+				if (((headerstring >>> 20) & 1) == 0) // SZD: MPEG2.5 detection
+					if (h_version == MPEG2_LSF)
+						h_version = MPEG25_LSF;
+					else
+						throw stream.newBitstreamException(Bitstream.UNKNOWN_ERROR);
+				if ((h_sample_frequency = ((headerstring >>> 10) & 3)) == 3)
+				{
+					throw stream.newBitstreamException(Bitstream.UNKNOWN_ERROR);
+				}
+			}
+			h_layer = 4 - (headerstring >>> 17) & 3;
+			h_protection_bit = (headerstring >>> 16) & 1;
+			h_bitrate_index = (headerstring >>> 12) & 0xF;
+			h_padding_bit = (headerstring >>> 9) & 1;
+			h_mode = ((headerstring >>> 6) & 3);
+			h_mode_extension = (headerstring >>> 4) & 3;
+			if (h_mode == JOINT_STEREO)
+				h_intensity_stereo_bound = (h_mode_extension << 2) + 4;
+			else
+				h_intensity_stereo_bound = 0; // should never be used
+			if (((headerstring >>> 3) & 1) == 1)
+				h_copyright = true;
+			if (((headerstring >>> 2) & 1) == 1)
+				h_original = true;
+			// calculate number of subbands:
+			if (h_layer == 1)
+				h_number_of_subbands = 32;
+			else
+			{
+				channel_bitrate = h_bitrate_index;
+				// calculate bitrate per channel:
+				if (h_mode != SINGLE_CHANNEL)
+					if (channel_bitrate == 4)
+						channel_bitrate = 1;
+					else
+						channel_bitrate -= 4;
+				if ((channel_bitrate == 1) || (channel_bitrate == 2))
+					if (h_sample_frequency == THIRTYTWO)
+						h_number_of_subbands = 12;
+					else
+						h_number_of_subbands = 8;
+				else if ((h_sample_frequency == FOURTYEIGHT) || ((channel_bitrate >= 3) && (channel_bitrate <= 5)))
+					h_number_of_subbands = 27;
+				else
+					h_number_of_subbands = 30;
+			}
+			if (h_intensity_stereo_bound > h_number_of_subbands)
+				h_intensity_stereo_bound = h_number_of_subbands;
+			// calculate framesize and nSlots
+			calculate_framesize();
+			// read framedata:
+			int framesizeloaded = stream.read_frame_data(framesize);
+			if ((framesize >=0) && (framesizeloaded != framesize))
+			{
+				// Data loaded does not match to expected framesize,
+				// it might be an ID3v1 TAG. (Fix 11/17/04).
+				throw stream.newBitstreamException(Bitstream.INVALIDFRAME);
+			}
+			if (stream.isSyncCurrentPosition(syncmode))
+			{
+				if (syncmode == Bitstream.INITIAL_SYNC)
+				{
+					syncmode = Bitstream.STRICT_SYNC;
+					stream.set_syncword(headerstring & 0xFFF80CC0);
+				}
+				sync = true;
+			}
+			else
+			{
+				stream.unreadFrame();
+			}
+		}
+		while (!sync);
+		stream.parse_frame();
+		if (h_protection_bit == 0)
+		{
+			// frame contains a crc checksum
+			checksum = (short) stream.get_bits(16);
+			if (crc == null)
+				crc = new Crc16();
+			crc.add_bits(headerstring, 16);
+			crcp[0] = crc;
+		}
+		else
+			crcp[0] = null;
+		if (h_sample_frequency == FOURTYFOUR_POINT_ONE)
+		{
+			/*
+				if (offset == null)
+			  {
+				  int max = max_number_of_frames(stream);
+				  offset = new int[max];
+			     for(int i=0; i<max; i++) offset[i] = 0;
+			  }
+			  // E.B : Investigate more
+			  int cf = stream.current_frame();
+			  int lf = stream.last_frame();
+			  if ((cf > 0) && (cf == lf))
+			  {
+				   offset[cf] = offset[cf-1] + h_padding_bit;
+			  }
+			  else
+			  {
+				       offset[0] = h_padding_bit;
+			  }
+			*/
+		}
+	}
+
+	/**
+	 * Parse frame to extract optionnal VBR frame.
+	 * @param firstframe
+	 * @author E.B (javalayer@javazoom.net)
+	 */
+	void parseVBR(byte[] firstframe) throws BitstreamException
+	{
+		// Trying Xing header.
+		String xing = "Xing";
+		byte tmp[] = new byte[4];
+		int offset = 0;
+		// Compute "Xing" offset depending on MPEG version and channels.
+		if (h_version == MPEG1) 
+		{
+		  if (h_mode == SINGLE_CHANNEL)  offset=21-4;
+		  else offset=36-4;
+		} 
+		else 
+		{
+		  if (h_mode == SINGLE_CHANNEL) offset=13-4;
+		  else offset = 21-4;		  
+		}
+		try
+		{
+			System.arraycopy(firstframe, offset, tmp, 0, 4);
+			// Is "Xing" ?
+			if (xing.equals(new String(tmp)))
+			{
+				//Yes.
+				h_vbr = true;
+				h_vbr_frames = -1;
+				h_vbr_bytes = -1;
+				h_vbr_scale = -1;
+				h_vbr_toc = new byte[100];
+								
+				int length = 4;
+				// Read flags.
+				byte flags[] = new byte[4];
+				System.arraycopy(firstframe, offset + length, flags, 0, flags.length);
+				length += flags.length;
+				// Read number of frames (if available).
+				if ((flags[3] & (byte) (1 << 0)) != 0)
+				{
+					System.arraycopy(firstframe, offset + length, tmp, 0, tmp.length);
+					h_vbr_frames = (tmp[0] << 24)&0xFF000000 | (tmp[1] << 16)&0x00FF0000 | (tmp[2] << 8)&0x0000FF00 | tmp[3]&0x000000FF;
+					length += 4;	
+				}
+				// Read size (if available).
+				if ((flags[3] & (byte) (1 << 1)) != 0)
+				{
+					System.arraycopy(firstframe, offset + length, tmp, 0, tmp.length);
+					h_vbr_bytes = (tmp[0] << 24)&0xFF000000 | (tmp[1] << 16)&0x00FF0000 | (tmp[2] << 8)&0x0000FF00 | tmp[3]&0x000000FF;
+					length += 4;	
+				}
+				// Read TOC (if available).
+				if ((flags[3] & (byte) (1 << 2)) != 0)
+				{
+					System.arraycopy(firstframe, offset + length, h_vbr_toc, 0, h_vbr_toc.length);
+					length += h_vbr_toc.length;	
+				}
+				// Read scale (if available).
+				if ((flags[3] & (byte) (1 << 3)) != 0)
+				{
+					System.arraycopy(firstframe, offset + length, tmp, 0, tmp.length);
+					h_vbr_scale = (tmp[0] << 24)&0xFF000000 | (tmp[1] << 16)&0x00FF0000 | (tmp[2] << 8)&0x0000FF00 | tmp[3]&0x000000FF;
+					length += 4;	
+				}
+				//System.out.println("VBR:"+xing+" Frames:"+ h_vbr_frames +" Size:"+h_vbr_bytes);			
+			}				
+		}
+		catch (ArrayIndexOutOfBoundsException e)
+		{
+			throw new BitstreamException("XingVBRHeader Corrupted",e);
+		}
+		
+		// Trying VBRI header.			
+		String vbri = "VBRI";
+		offset = 36-4;
+		try
+		{
+			System.arraycopy(firstframe, offset, tmp, 0, 4);
+			// Is "VBRI" ?
+			if (vbri.equals(new String(tmp)))
+			{
+				//Yes.
+				h_vbr = true;
+				h_vbr_frames = -1;
+				h_vbr_bytes = -1;
+				h_vbr_scale = -1;
+				h_vbr_toc = new byte[100];
+				// Bytes.				
+				int length = 4 + 6;
+				System.arraycopy(firstframe, offset + length, tmp, 0, tmp.length);
+				h_vbr_bytes = (tmp[0] << 24)&0xFF000000 | (tmp[1] << 16)&0x00FF0000 | (tmp[2] << 8)&0x0000FF00 | tmp[3]&0x000000FF;
+				length += 4;	
+				// Frames.	
+				System.arraycopy(firstframe, offset + length, tmp, 0, tmp.length);
+				h_vbr_frames = (tmp[0] << 24)&0xFF000000 | (tmp[1] << 16)&0x00FF0000 | (tmp[2] << 8)&0x0000FF00 | tmp[3]&0x000000FF;
+				length += 4;	
+				//System.out.println("VBR:"+vbri+" Frames:"+ h_vbr_frames +" Size:"+h_vbr_bytes);
+				// TOC
+				// TODO				
+			}
+		}
+		catch (ArrayIndexOutOfBoundsException e)
+		{
+			throw new BitstreamException("VBRIVBRHeader Corrupted",e);
+		}
+	}
+	
+	// Functions to query header contents:
+	/**
+	 * Returns version.
+	 */
+	public int version() { return h_version; }
+
+	/**
+	 * Returns Layer ID.
+	 */
+	public int layer() { return h_layer; }
+
+	/**
+	 * Returns bitrate index.
+	 */
+	public int bitrate_index() { return h_bitrate_index; }
+
+	/**
+	 * Returns Sample Frequency.
+	 */
+	public int sample_frequency() { return h_sample_frequency; }
+
+	/**
+	 * Returns Frequency.
+	 */
+	public int frequency() {return frequencies[h_version][h_sample_frequency];}
+
+	/**
+	 * Returns Mode.
+	 */
+	public int mode() { return h_mode; }
+
+	/**
+	 * Returns Protection bit.
+	 */
+	public boolean checksums()
+	{
+		if (h_protection_bit == 0) return true;
+	  else return false;
+	}
+
+	/**
+	 * Returns Copyright.
+	 */
+	public boolean copyright() { return h_copyright; }
+
+	/**
+	 * Returns Original.
+	 */
+	public boolean original() { return h_original; }
+
+	/**
+	 * Return VBR.
+	 * @return true if VBR header is found
+	 */
+	public boolean vbr() { return h_vbr; }
+
+	/**
+	 * Return VBR scale.
+	 * @return scale of -1 if not available
+	 */
+	public int vbr_scale() { return h_vbr_scale; }
+
+	/**
+	 * Return VBR TOC.
+	 * @return vbr toc ot null if not available
+	 */
+	public byte[] vbr_toc() { return h_vbr_toc; }
+
+	/**
+	 * Returns Checksum flag.
+	 * Compares computed checksum with stream checksum.
+	 */
+	public boolean checksum_ok () { return (checksum == crc.checksum()); }
+
+	// Seeking and layer III stuff
+	/**
+	 * Returns Layer III Padding bit.
+	 */
+	public boolean padding()
+	{
+		if (h_padding_bit == 0) return false;
+	  else return true;
+	}
+
+	/**
+	 * Returns Slots.
+	 */
+	public int slots() { return nSlots; }
+
+	/**
+	 * Returns Mode Extension.
+	 */
+	public int mode_extension() { return h_mode_extension; }
+
+	// E.B -> private to public
+	public static final int bitrates[][][] = {
+		{{0 /*free format*/, 32000, 48000, 56000, 64000, 80000, 96000,
+	  112000, 128000, 144000, 160000, 176000, 192000 ,224000, 256000, 0},
+	 	{0 /*free format*/, 8000, 16000, 24000, 32000, 40000, 48000,
+	  56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 0},
+	 	{0 /*free format*/, 8000, 16000, 24000, 32000, 40000, 48000,
+	  56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 0}},
+
+		{{0 /*free format*/, 32000, 64000, 96000, 128000, 160000, 192000,
+	   224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000, 0},
+	  {0 /*free format*/, 32000, 48000, 56000, 64000, 80000, 96000,
+	   112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000, 0},
+	  {0 /*free format*/, 32000, 40000, 48000, 56000, 64000, 80000,
+	   96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 0}},
+		// SZD: MPEG2.5
+		{{0 /*free format*/, 32000, 48000, 56000, 64000, 80000, 96000,
+	  112000, 128000, 144000, 160000, 176000, 192000 ,224000, 256000, 0},
+	 	{0 /*free format*/, 8000, 16000, 24000, 32000, 40000, 48000,
+	  56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 0},
+	 	{0 /*free format*/, 8000, 16000, 24000, 32000, 40000, 48000,
+	  56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 0}},
+
+		};
+
+	// E.B -> private to public
+	/**
+	 * Calculate Frame size.
+	 * Calculates framesize in bytes excluding header size.
+	 */
+	public int calculate_framesize()
+	{
+
+	 if (h_layer == 1)
+	 {
+	   framesize = (12 * bitrates[h_version][0][h_bitrate_index]) /
+	               frequencies[h_version][h_sample_frequency];
+	   if (h_padding_bit != 0 ) framesize++;
+	   framesize <<= 2;		// one slot is 4 bytes long
+	   nSlots = 0;
+	 }
+	 else
+	 {
+	   framesize = (144 * bitrates[h_version][h_layer - 1][h_bitrate_index]) /
+	               frequencies[h_version][h_sample_frequency];
+	   if (h_version == MPEG2_LSF || h_version == MPEG25_LSF) framesize >>= 1;	// SZD
+	   if (h_padding_bit != 0) framesize++;
+	   // Layer III slots
+	   if (h_layer == 3)
+	   {
+	     if (h_version == MPEG1)
+	     {
+	  		 nSlots = framesize - ((h_mode == SINGLE_CHANNEL) ? 17 : 32) // side info size
+	  								  -  ((h_protection_bit!=0) ? 0 : 2) 		       // CRC size
+	  								  - 4; 								             // header size
+	     }
+	     else
+		 {  // MPEG-2 LSF, SZD: MPEG-2.5 LSF
+	        nSlots = framesize - ((h_mode == SINGLE_CHANNEL) ?  9 : 17) // side info size
+	  					   		  -  ((h_protection_bit!=0) ? 0 : 2) 		       // CRC size
+	  								  - 4; 								             // header size
+	     }
+	   }
+	   else
+	   {
+	  	 nSlots = 0;
+	   }
+	 }
+	 framesize -= 4;             // subtract header size
+	 return framesize;
+	}
+
+	/**
+	 * Returns the maximum number of frames in the stream.
+	 * @param streamsize
+	 * @return number of frames
+	 */
+	public int max_number_of_frames(int streamsize)  // E.B
+	{
+		if (h_vbr == true) return h_vbr_frames;
+		else
+		{
+			if ((framesize + 4 - h_padding_bit) == 0) return 0;
+			else return(streamsize / (framesize + 4 - h_padding_bit));
+		}
+	}
+
+	/**
+	 * Returns the maximum number of frames in the stream.
+	 * @param streamsize
+	 * @return number of frames
+	 */
+	public int min_number_of_frames(int streamsize) // E.B
+	{
+		if (h_vbr == true) return h_vbr_frames;
+		else
+		{
+	  		if ((framesize + 5 - h_padding_bit) == 0) return 0;
+	  		else return(streamsize / (framesize + 5 - h_padding_bit));
+		}
+	}
+
+
+	/**
+	 * Returns ms/frame.
+	 * @return milliseconds per frame
+	 */
+	public float ms_per_frame() // E.B
+	{
+		if (h_vbr == true)
+		{			
+			double tpf = h_vbr_time_per_frame[layer()] / frequency();
+			if ((h_version == MPEG2_LSF) || (h_version == MPEG25_LSF)) tpf /= 2;
+			return ((float) (tpf * 1000));
+		}
+		else
+		{
+			float ms_per_frame_array[][] = {{8.707483f,  8.0f, 12.0f},
+											{26.12245f, 24.0f, 36.0f},
+											{26.12245f, 24.0f, 36.0f}};
+			return(ms_per_frame_array[h_layer-1][h_sample_frequency]);
+		}
+	}
+
+	/**
+	 * Returns total ms.
+	 * @param streamsize
+	 * @return total milliseconds
+	 */
+	public float total_ms(int streamsize) // E.B
+	{
+		return(max_number_of_frames(streamsize) * ms_per_frame());
+	}
+
+	/**
+	 * Returns synchronized header.
+	 */
+	public int getSyncHeader() // E.B
+	{
+		return _headerstring;
+	}
+
+	// functions which return header informations as strings:
+	/**
+	 * Return Layer version.
+	 */
+	public String layer_string()
+	{
+		switch (h_layer)
+		{
+	   case 1:
+	  	return "I";
+	   case 2:
+	  	return "II";
+	   case 3:
+	  	return "III";
+		}
+	  return null;
+	}
+
+	// E.B -> private to public
+	public static final String bitrate_str[][][] = {
+		{{"free format", "32 kbit/s", "48 kbit/s", "56 kbit/s", "64 kbit/s",
+	  "80 kbit/s", "96 kbit/s", "112 kbit/s", "128 kbit/s", "144 kbit/s",
+	  "160 kbit/s", "176 kbit/s", "192 kbit/s", "224 kbit/s", "256 kbit/s",
+	  "forbidden"},
+	  {"free format", "8 kbit/s", "16 kbit/s", "24 kbit/s", "32 kbit/s",
+	  "40 kbit/s", "48 kbit/s", "56 kbit/s", "64 kbit/s", "80 kbit/s",
+	  "96 kbit/s", "112 kbit/s", "128 kbit/s", "144 kbit/s", "160 kbit/s",
+	  "forbidden"},
+	  {"free format", "8 kbit/s", "16 kbit/s", "24 kbit/s", "32 kbit/s",
+	  "40 kbit/s", "48 kbit/s", "56 kbit/s", "64 kbit/s", "80 kbit/s",
+	  "96 kbit/s", "112 kbit/s", "128 kbit/s", "144 kbit/s", "160 kbit/s",
+	  "forbidden"}},
+
+	  {{"free format", "32 kbit/s", "64 kbit/s", "96 kbit/s", "128 kbit/s",
+	  "160 kbit/s", "192 kbit/s", "224 kbit/s", "256 kbit/s", "288 kbit/s",
+	  "320 kbit/s", "352 kbit/s", "384 kbit/s", "416 kbit/s", "448 kbit/s",
+	  "forbidden"},
+	  {"free format", "32 kbit/s", "48 kbit/s", "56 kbit/s", "64 kbit/s",
+	  "80 kbit/s", "96 kbit/s", "112 kbit/s", "128 kbit/s", "160 kbit/s",
+	  "192 kbit/s", "224 kbit/s", "256 kbit/s", "320 kbit/s", "384 kbit/s",
+	  "forbidden"},
+	  {"free format", "32 kbit/s", "40 kbit/s", "48 kbit/s", "56 kbit/s",
+	  "64 kbit/s", "80 kbit/s" , "96 kbit/s", "112 kbit/s", "128 kbit/s",
+	  "160 kbit/s", "192 kbit/s", "224 kbit/s", "256 kbit/s", "320 kbit/s",
+	  "forbidden"}},
+		// SZD: MPEG2.5
+		{{"free format", "32 kbit/s", "48 kbit/s", "56 kbit/s", "64 kbit/s",
+	  "80 kbit/s", "96 kbit/s", "112 kbit/s", "128 kbit/s", "144 kbit/s",
+	  "160 kbit/s", "176 kbit/s", "192 kbit/s", "224 kbit/s", "256 kbit/s",
+	  "forbidden"},
+	  {"free format", "8 kbit/s", "16 kbit/s", "24 kbit/s", "32 kbit/s",
+	  "40 kbit/s", "48 kbit/s", "56 kbit/s", "64 kbit/s", "80 kbit/s",
+	  "96 kbit/s", "112 kbit/s", "128 kbit/s", "144 kbit/s", "160 kbit/s",
+	  "forbidden"},
+	  {"free format", "8 kbit/s", "16 kbit/s", "24 kbit/s", "32 kbit/s",
+	  "40 kbit/s", "48 kbit/s", "56 kbit/s", "64 kbit/s", "80 kbit/s",
+	  "96 kbit/s", "112 kbit/s", "128 kbit/s", "144 kbit/s", "160 kbit/s",
+	  "forbidden"}},
+	  };
+
+	/**
+	 * Return Bitrate.
+	 * @return bitrate in bps
+	 */
+	public String bitrate_string()
+	{
+		if (h_vbr == true)
+		{
+			return Integer.toString(bitrate()/1000)+" kb/s";		
+		}
+	  else return bitrate_str[h_version][h_layer - 1][h_bitrate_index];
+	}
+
+	/**
+	 * Return Bitrate.
+	 * @return bitrate in bps and average bitrate for VBR header
+	 */
+	public int bitrate()
+	{
+		if (h_vbr == true)
+		{
+			return ((int) ((h_vbr_bytes * 8) / (ms_per_frame() * h_vbr_frames)))*1000;		
+		}
+		else return bitrates[h_version][h_layer - 1][h_bitrate_index];
+	}
+
+	/**
+	 * Return Instant Bitrate.
+	 * Bitrate for VBR is not constant.
+	 * @return bitrate in bps
+	 */
+	public int bitrate_instant()
+	{
+		return bitrates[h_version][h_layer - 1][h_bitrate_index];
+	}
+
+	/**
+	 * Returns Frequency
+	 * @return frequency string in kHz
+	 */
+	public String sample_frequency_string()
+	{
+		switch (h_sample_frequency)
+		{
+	    case THIRTYTWO:
+	  	if (h_version == MPEG1)
+	  		return "32 kHz";
+	  	else if (h_version == MPEG2_LSF)
+	    	return "16 kHz";
+	    else	// SZD
+	    	return "8 kHz";
+	    case FOURTYFOUR_POINT_ONE:
+	  	if (h_version == MPEG1)
+	  		return "44.1 kHz";
+	  	else if (h_version == MPEG2_LSF)
+	    	return "22.05 kHz";
+		else	// SZD
+	    	return "11.025 kHz";
+	    case FOURTYEIGHT:
+	  	if (h_version == MPEG1)
+	  		return "48 kHz";
+	  	else if (h_version == MPEG2_LSF)
+	    	return "24 kHz";
+		else	// SZD
+			return "12 kHz";
+	  }
+	  return(null);
+	}
+
+	/**
+	 * Returns Mode.
+	 */
+	public String mode_string()
+	{
+	   switch (h_mode)
+	   {
+	     case STEREO:
+	  	return "Stereo";
+	     case JOINT_STEREO:
+	  	return "Joint stereo";
+	     case DUAL_CHANNEL:
+	  	return "Dual channel";
+	     case SINGLE_CHANNEL:
+	  	return "Single channel";
+	   }
+	   return null;
+	}
+
+	/**
+	 * Returns Version.
+	 * @return MPEG-1 or MPEG-2 LSF or MPEG-2.5 LSF
+	 */
+	public String version_string()
+	{
+	  switch (h_version)
+	  {
+	    case MPEG1:
+	      return "MPEG-1";
+	    case MPEG2_LSF:
+	      return "MPEG-2 LSF";
+	    case MPEG25_LSF:	// SZD
+	      return "MPEG-2.5 LSF";
+	  }
+	  return(null);
+	}
+
+	/**
+	 * Returns the number of subbands in the current frame.
+	 * @return number of subbands
+	 */
+	public int number_of_subbands() {return h_number_of_subbands;}
+
+	/**
+	 * Returns Intensity Stereo.
+	 * (Layer II joint stereo only).
+	 * Returns the number of subbands which are in stereo mode,
+	 * subbands above that limit are in intensity stereo mode.
+	 * @return intensity
+	 */
+	public int intensity_stereo_bound() {return h_intensity_stereo_bound;}
+}