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A port of the Free Lossless Audio Codec (FLAC) decoder to Java and a FLAC encoder implemented in Java.

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/**
 * libFLAC - Free Lossless Audio Codec library
 * Copyright (C) 2001,2002,2003  Josh Coalson
 *
 * This library 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 library 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 library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA.
 */

package org.kc7bfi.jflac.metadata;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import org.kc7bfi.jflac.io.BitInputStream;


/**
 * Picture Metadata block.
 * @author BMacNaughton
 */
public class Picture extends Metadata {
	public enum PictureType {
		 Other(0),
		 file_icon_32x32_PNG(1),
		 Other_file_icon(2),
		 Cover_front(3),
		 Cover_back(4),
		 Leaflet_page(5),
		 Media_label(6),
		 Lead_artist(7),
		 Artist(8),
		 Conductor(9),
		 Band(10),
		 Composer(11),
		 Lyricist(12),
		 Recording_Location(13),
		 During_recording(14),
		 During_performance(15),
		 Movie_screen_capture(16),
		 Bright_coloured_fish(17),
		 Illustration(18),
		 Band_logotype(19),
		 Publisher_logotype(20);
		 PictureType(int t) {
			 picType = t;
		 }
		 final int picType;
	};
    private PictureType pictureType;
    private int mimeTypeByteCount;
    private String mimeString;      //ASCII 0x20 to 0x7e or --> (data is URL)
    private int descStringByteCount;
    private String descString;      // UTF-8
    private int picPixelWidth;
    private int picPixelHeight;
    private int picBitsPerPixel;
    private int picColorCount;      // for GIF, else 0
    private int picByteCount;
    
    protected byte[] image;
    
    /**
     * The constructor.
     * @param is                The InputBitStream
     * @param length            Length of the record
     * @param isLast            True if this is the last Metadata block in the chain
     * @throws IOException      Thrown if error reading from InputBitStream
     */
    public Picture(BitInputStream is, int length, boolean isLast) throws IOException {
        super(isLast, length);
        int usedBits = 0;
        byte[] data;
        int t = is.readRawUInt(32);
		for (PictureType pt : PictureType.values())
			if (pt.picType == t)
				pictureType = pt;
        usedBits += 32;
        
        mimeTypeByteCount = is.readRawUInt(32);
        usedBits += 32;
        
        data = new byte[mimeTypeByteCount];
        is.readByteBlockAlignedNoCRC(data, mimeTypeByteCount);
        usedBits += mimeTypeByteCount*8;
        
        mimeString = new String(data);  // convert to a string
        
        descStringByteCount = is.readRawUInt(32);
        usedBits += 32;
        
        if (descStringByteCount != 0) {
            data = new byte[descStringByteCount];
            is.readByteBlockAlignedNoCRC(data, descStringByteCount);
            usedBits += descStringByteCount*8;
            try {
                descString = new String(data, "UTF-8");
            } catch (UnsupportedEncodingException e) {}
            
        } else {
            descString = new String("");
        }
        
        picPixelWidth = is.readRawUInt(32);
        usedBits += 32;
        
        picPixelHeight = is.readRawUInt(32);
        usedBits += 32;
        
        picBitsPerPixel = is.readRawUInt(32);
        usedBits += 32;
        
        picColorCount = is.readRawUInt(32);
        usedBits += 32;
        
        picByteCount = is.readRawUInt(32);
        usedBits += 32;
        
        //get the image now
        image = new byte[picByteCount];
        is.readByteBlockAlignedNoCRC(image, picByteCount);
        usedBits += picByteCount*8;
        
        // skip the rest of the block if any        
        length -= (usedBits / 8);
        if (length > 0)
        	is.readByteBlockAlignedNoCRC(null, length);
    }
    
    public PictureType getPictureType() {
		return pictureType;
	}


	public String getMimeString() {
		return mimeString;
	}


	public String getDescString() {
		return descString;
	}


	public int getPicPixelWidth() {
		return picPixelWidth;
	}



	public int getPicPixelHeight() {
		return picPixelHeight;
	}


	public byte[] getImage() {
		return image;
	}


	/**
     * Convert the class to a string representation.
     * @return  A string representation of the Picture metadata
     */

    @Override
    public String toString() {
        return "Picture: " 
            + " Type=" + pictureType
            + " MIME type=" + mimeString
            + " Description=\"" + descString + "\""
            + " Pixels (WxH)=" + picPixelWidth + "x" + picPixelHeight
            + " Color Depth=" + picBitsPerPixel
            + " Color Count=" + picColorCount
            + " Picture Size (bytes)=" + picByteCount
            + " last ="+isLast;
    }
 
}




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