135 lines
3.5 KiB
Java
135 lines
3.5 KiB
Java
/*
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This file is part of Subsonic.
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Subsonic 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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Subsonic 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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You should have received a copy of the GNU General Public License
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along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2009 (C) Sindre Mehus
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*/
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package org.moire.ultrasonic.util;
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import android.content.Context;
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import android.util.Log;
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import org.moire.ultrasonic.data.ActiveServerProvider;
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import org.moire.ultrasonic.domain.MusicDirectory;
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import org.moire.ultrasonic.service.MusicService;
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import org.moire.ultrasonic.service.MusicServiceFactory;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ScheduledExecutorService;
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import java.util.concurrent.TimeUnit;
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/**
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* @author Sindre Mehus
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* @version $Id$
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*/
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public class ShufflePlayBuffer
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{
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private static final String TAG = ShufflePlayBuffer.class.getSimpleName();
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private static final int CAPACITY = 50;
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private static final int REFILL_THRESHOLD = 40;
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private final List<MusicDirectory.Entry> buffer = new ArrayList<MusicDirectory.Entry>();
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private final Context context;
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private ScheduledExecutorService executorService;
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private int currentServer;
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public boolean isEnabled = false;
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public ShufflePlayBuffer(Context context)
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{
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this.context = context;
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}
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public void onCreate()
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{
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executorService = Executors.newSingleThreadScheduledExecutor();
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Runnable runnable = new Runnable()
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{
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@Override
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public void run()
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{
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refill();
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}
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};
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executorService.scheduleWithFixedDelay(runnable, 1, 10, TimeUnit.SECONDS);
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Log.i(TAG, "ShufflePlayBuffer created");
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}
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public void onDestroy()
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{
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executorService.shutdown();
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Log.i(TAG, "ShufflePlayBuffer destroyed");
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}
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public List<MusicDirectory.Entry> get(int size)
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{
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clearBufferIfNecessary();
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List<MusicDirectory.Entry> result = new ArrayList<MusicDirectory.Entry>(size);
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synchronized (buffer)
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{
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while (!buffer.isEmpty() && result.size() < size)
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{
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result.add(buffer.remove(buffer.size() - 1));
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}
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}
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Log.i(TAG, String.format("Taking %d songs from shuffle play buffer. %d remaining.", result.size(), buffer.size()));
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return result;
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}
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private void refill()
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{
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if (!isEnabled) return;
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// Check if active server has changed.
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clearBufferIfNecessary();
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if (buffer.size() > REFILL_THRESHOLD || (!Util.isNetworkConnected(context) && !ActiveServerProvider.Companion.isOffline(context)))
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{
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return;
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}
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try
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{
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MusicService service = MusicServiceFactory.getMusicService(context);
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int n = CAPACITY - buffer.size();
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MusicDirectory songs = service.getRandomSongs(n, context, null);
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synchronized (buffer)
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{
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buffer.addAll(songs.getChildren());
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Log.i(TAG, String.format("Refilled shuffle play buffer with %d songs.", songs.getChildren().size()));
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}
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}
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catch (Exception x)
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{
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Log.w(TAG, "Failed to refill shuffle play buffer.", x);
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}
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}
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private void clearBufferIfNecessary()
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{
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synchronized (buffer)
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{
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if (currentServer != ActiveServerProvider.Companion.getActiveServerId(context))
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{
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currentServer = ActiveServerProvider.Companion.getActiveServerId(context);
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buffer.clear();
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}
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}
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}
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} |