imageformats.java

java+eclipse做的TTPlayer

/**
 *  @author : Paul Taylor
 *
 *  Version @version:$Id: ImageFormats.java,v 1.6 2007/08/06 16:04:36 paultaylor Exp $
 *
 *  MusicTag Copyright (C)2003,2004
 *
 *  This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser
 *  General Public  License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License along with this library; if not,
 *  you can get a copy from http://www.opensource.org/licenses/lgpl-license.php or write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Description:
 * This class maps from v2.2 Image formats (PIC) to v2.3/v2.4 Mimetypes (APIC) and
 *  vice versa.
 */
package com.hadeslee.audiotag.tag.id3.valuepair;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/** Represents the image formats support by ID3, provides a mapping between the format field supported in ID3v22 and the
 *  mimetype field supported by ID3v23/ID3v24.
 */
public class ImageFormats
{
    public static final String V22_JPG_FORMAT = "JPG";
    public static final String V22_PNG_FORMAT = "PNG";
    public static final String V22_GIF_FORMAT = "GIF";
    public static final String V22_BMP_FORMAT = "BMP";

    public static final String MIME_TYPE_JPEG = "image/jpeg";
    public static final String MIME_TYPE_PNG  = "image/png";
    public static final String MIME_TYPE_GIF  = "image/gif";
    public static final String MIME_TYPE_BMP  = "image/bmp";

    /** Sometimes this is used for jpg instead :or have I made this up */
    public static final String MIME_TYPE_JPG  = "image/jpg";

    private static Map<String,String> imageFormatsToMimeType = new HashMap <String,String>();
    private static Map<String,String> imageMimeTypeToFormat  = new HashMap<String,String>();

    static
    {
        imageFormatsToMimeType.put(V22_JPG_FORMAT, MIME_TYPE_JPEG);
        imageFormatsToMimeType.put(V22_PNG_FORMAT, MIME_TYPE_PNG);
        imageFormatsToMimeType.put(V22_GIF_FORMAT, MIME_TYPE_GIF);
        imageFormatsToMimeType.put(V22_BMP_FORMAT, MIME_TYPE_BMP);
        String value;
        for (String key :imageFormatsToMimeType.keySet())
        {
            value = imageFormatsToMimeType.get(key);
            imageMimeTypeToFormat.put(value, key);
        }

        //The mapping isnt one-one lets add other mimetypes
        imageMimeTypeToFormat.put(MIME_TYPE_JPG,V22_JPG_FORMAT);
    }

    /**
     * Get v2.3 mimetype from v2.2 format
     */
    public static String getMimeTypeForFormat(String format)
    {
        return imageFormatsToMimeType.get(format);
    }

    /**
     * Get v2.2 format from v2.3 mimetype
     */
    public static String getFormatForMimeType(String mimeType)
    {
        return imageMimeTypeToFormat.get(mimeType);
    }

}