Android Open Source - vanilindy Bastp Util

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Back to project page vanilindy.

License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
 */*from   w w  w .  j  a  v a 2s  .c  o m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>. 
 */
 
package ch.blinkenlights.android.vanilla;

import android.util.LruCache;
import ch.blinkenlights.bastp.Bastp;
import java.util.HashMap;
import java.util.Vector;

public class BastpUtil {
  private RGLruCache rgCache;
  
  public BastpUtil() {
    rgCache = new RGLruCache(16); /* Cache up to 16 entries */
  }
  
  
  /** Returns the ReplayGain values of 'path' as <track,album>
   */
  public float[] getReplayGainValues(String path) {
    float[] cached = rgCache.get(path);

    if(cached == null) {
      cached = getReplayGainValuesFromFile(path);
      rgCache.put(path, cached);
    }
    return cached;
  }
  
  
  
  /** Parse given file and return track,album replay gain values
   */
  private float[] getReplayGainValuesFromFile(String path) {
    String[] keys = { "REPLAYGAIN_TRACK_GAIN", "REPLAYGAIN_ALBUM_GAIN" };
    float[] adjust= { 0f                     , 0f                      };
    HashMap tags  = (new Bastp()).getTags(path);
    
    for (int i=0; i<keys.length; i++) {
      String curKey = keys[i];
      if(tags.containsKey(curKey)) {
        String rg_raw = (String)((Vector)tags.get(curKey)).get(0);
        String rg_numonly = "";
        float rg_float = 0f;
        try {
          String nums = rg_raw.replaceAll("[^0-9.-]","");
          rg_float = Float.parseFloat(nums);
        } catch(Exception e) {}
        adjust[i] = rg_float;
      }
    }
    return adjust;
  }
  
  /** LRU cache for ReplayGain values
   */
  private class RGLruCache extends LruCache<String, float[]> {
    public RGLruCache(int size) {
      super(size);
    }
  }

}

Java Source Code List