89 lines
2.7 KiB
Java
89 lines
2.7 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 2011 (C) Sindre Mehus
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*/
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package net.sourceforge.subsonic.androidapp.audiofx;
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import android.content.Context;
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import android.media.MediaPlayer;
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import android.media.audiofx.Visualizer;
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import android.util.Log;
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/**
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* Backward-compatible wrapper for {@link Visualizer}, which is API Level 9.
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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 VisualizerController {
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private static final String TAG = VisualizerController.class.getSimpleName();
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private static final int PREFERRED_CAPTURE_SIZE = 128; // Must be a power of two.
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private Visualizer visualizer;
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// Class initialization fails when this throws an exception.
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static {
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try {
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Class.forName("android.media.audiofx.Visualizer");
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} catch (Exception ex) {
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throw new RuntimeException(ex);
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}
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}
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/**
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* Throws an exception if the {@link Visualizer} class is not available.
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*/
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public static void checkAvailable() throws Throwable {
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// Calling here forces class initialization.
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}
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public VisualizerController(Context context, MediaPlayer mediaPlayer) {
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try {
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visualizer = new Visualizer(mediaPlayer.getAudioSessionId());
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} catch (Throwable x) {
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Log.w(TAG, "Failed to create visualizer.", x);
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}
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if (visualizer != null) {
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int[] captureSizeRange = Visualizer.getCaptureSizeRange();
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int captureSize = Math.max(PREFERRED_CAPTURE_SIZE, captureSizeRange[0]);
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captureSize = Math.min(captureSize, captureSizeRange[1]);
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visualizer.setCaptureSize(captureSize);
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}
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}
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public boolean isAvailable() {
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return visualizer != null;
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}
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public boolean isEnabled() {
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return isAvailable() && visualizer.getEnabled();
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}
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public void release() {
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if (isAvailable()) {
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visualizer.release();
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}
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}
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public Visualizer getVisualizer() {
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return visualizer;
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}
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}
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