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/*
* Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
*
* 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 github.daneren2005.dsub.util.tags;
import android.support.v4.util.LruCache;
import java.util.HashMap;
import java.util.Vector;
public final class BastpUtil {
private static final RGLruCache rgCache = new RGLruCache(16);
/** Returns the ReplayGain values of 'path' as <track,album>
*/
public static 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 static 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 static class RGLruCache extends LruCache<String, float[]> {
public RGLruCache(int size) {
super(size);
}
}
}
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