77 lines
2.3 KiB
Java
77 lines
2.3 KiB
Java
/*
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* Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.nullsum.audinaut.util.tags;
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import androidx.collection.LruCache;
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import java.util.HashMap;
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import java.util.Vector;
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public final class BastpUtil {
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private static final RGLruCache rgCache = new RGLruCache();
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/**
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* Returns the ReplayGain values of 'path' as <track,album>
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*/
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public static float[] getReplayGainValues(String path) {
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float[] cached = rgCache.get(path);
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if (cached == null) {
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cached = getReplayGainValuesFromFile(path);
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rgCache.put(path, cached);
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}
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return cached;
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}
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/**
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* Parse given file and return track,album replay gain values
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*/
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private static float[] getReplayGainValuesFromFile(String path) {
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String[] keys = {"REPLAYGAIN_TRACK_GAIN", "REPLAYGAIN_ALBUM_GAIN"};
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float[] adjust = {0f, 0f};
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HashMap tags = (new Bastp()).getTags(path);
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for (int i = 0; i < keys.length; i++) {
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String curKey = keys[i];
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if (tags.containsKey(curKey)) {
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String rg_raw = (String) ((Vector) tags.get(curKey)).get(0);
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float rg_float = 0f;
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try {
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String nums = rg_raw.replaceAll("[^0-9.-]", "");
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rg_float = Float.parseFloat(nums);
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} catch (Exception ignored) {
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}
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adjust[i] = rg_float;
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}
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}
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return adjust;
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}
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/**
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* LRU cache for ReplayGain values
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*/
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private static class RGLruCache extends LruCache<String, float[]> {
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public RGLruCache() {
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super(16);
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}
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}
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}
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