/*
 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.media.sound;

import java.util.Arrays;

import javax.sound.sampled.*;

Class to write an AudioInputStream to a SourceDataLine. Was previously an inner class in various classes like JavaSoundAudioClip and sun.audio.AudioDevice. It auto-opens and closes the SourceDataLine.
Author:Kara Kytle, Florian Bomers
/** * Class to write an AudioInputStream to a SourceDataLine. * Was previously an inner class in various classes like JavaSoundAudioClip * and sun.audio.AudioDevice. * It auto-opens and closes the SourceDataLine. * * @author Kara Kytle * @author Florian Bomers */
public final class DataPusher implements Runnable { private static final int AUTO_CLOSE_TIME = 5000; private static final boolean DEBUG = false; private final SourceDataLine source; private final AudioFormat format; // stream as source data private final AudioInputStream ais; // byte array as source data private final byte[] audioData; private final int audioDataByteLength; private int pos; private int newPos = -1; private boolean looping; private Thread pushThread = null; private int wantedState; private int threadState; private final int STATE_NONE = 0; private final int STATE_PLAYING = 1; private final int STATE_WAITING = 2; private final int STATE_STOPPING = 3; private final int STATE_STOPPED = 4; private final int BUFFER_SIZE = 16384; public DataPusher(SourceDataLine sourceLine, AudioFormat format, byte[] audioData, int byteLength) { this(sourceLine, format, null, audioData, byteLength); } public DataPusher(SourceDataLine sourceLine, AudioInputStream ais) { this(sourceLine, ais.getFormat(), ais, null, 0); } private DataPusher(final SourceDataLine source, final AudioFormat format, final AudioInputStream ais, final byte[] audioData, final int audioDataByteLength) { this.source = source; this.format = format; this.ais = ais; this.audioDataByteLength = audioDataByteLength; this.audioData = audioData == null ? null : Arrays.copyOf(audioData, audioData.length); } public synchronized void start() { start(false); } public synchronized void start(boolean loop) { if (DEBUG || Printer.debug) Printer.debug("> DataPusher.start(loop="+loop+")"); try { if (threadState == STATE_STOPPING) { // wait that the thread has finished stopping if (DEBUG || Printer.trace)Printer.trace("DataPusher.start(): calling stop()"); stop(); } looping = loop; newPos = 0; wantedState = STATE_PLAYING; if (!source.isOpen()) { if (DEBUG || Printer.trace)Printer.trace("DataPusher: source.open()"); source.open(format); } if (DEBUG || Printer.trace)Printer.trace("DataPusher: source.flush()"); source.flush(); if (DEBUG || Printer.trace)Printer.trace("DataPusher: source.start()"); source.start(); if (pushThread == null) { if (DEBUG || Printer.debug) Printer.debug("DataPusher.start(): Starting push"); pushThread = JSSecurityManager.createThread(this, null, // name false, // daemon -1, // priority true); // doStart } notifyAll(); } catch (Exception e) { if (DEBUG || Printer.err) e.printStackTrace(); } if (DEBUG || Printer.debug) Printer.debug("< DataPusher.start(loop="+loop+")"); } public synchronized void stop() { if (DEBUG || Printer.debug) Printer.debug("> DataPusher.stop()"); if (threadState == STATE_STOPPING || threadState == STATE_STOPPED || pushThread == null) { if (DEBUG || Printer.debug) Printer.debug("DataPusher.stop(): nothing to do"); return; } if (DEBUG || Printer.debug) Printer.debug("DataPusher.stop(): Stopping push"); wantedState = STATE_WAITING; if (source != null) { if (DEBUG || Printer.trace)Printer.trace("DataPusher: source.flush()"); source.flush(); } notifyAll(); int maxWaitCount = 50; // 5 seconds while ((maxWaitCount-- >= 0) && (threadState == STATE_PLAYING)) { try { wait(100); } catch (InterruptedException e) { } } if (DEBUG || Printer.debug) Printer.debug("< DataPusher.stop()"); } synchronized void close() { if (source != null) { if (DEBUG || Printer.trace)Printer.trace("DataPusher.close(): source.close()"); source.close(); } }
Write data to the source data line.
/** * Write data to the source data line. */
public void run() { byte[] buffer = null; boolean useStream = (ais != null); if (useStream) { buffer = new byte[BUFFER_SIZE]; } else { buffer = audioData; } while (wantedState != STATE_STOPPING) { //try { if (wantedState == STATE_WAITING) { // wait for 5 seconds - maybe the clip is to be played again if (DEBUG || Printer.debug)Printer.debug("DataPusher.run(): waiting 5 seconds"); try { synchronized(this) { threadState = STATE_WAITING; wantedState = STATE_STOPPING; wait(AUTO_CLOSE_TIME); } } catch (InterruptedException ie) {} if (DEBUG || Printer.debug)Printer.debug("DataPusher.run(): waiting finished"); continue; } if (newPos >= 0) { pos = newPos; newPos = -1; } threadState = STATE_PLAYING; int toWrite = BUFFER_SIZE; if (useStream) { try { pos = 0; // always write from beginning of buffer // don't use read(byte[]), because some streams // may not override that method toWrite = ais.read(buffer, 0, buffer.length); } catch (java.io.IOException ioe) { // end of stream toWrite = -1; } } else { if (toWrite > audioDataByteLength - pos) { toWrite = audioDataByteLength - pos; } if (toWrite == 0) { toWrite = -1; // end of "stream" } } if (toWrite < 0) { if (DEBUG || Printer.debug) Printer.debug("DataPusher.run(): Found end of stream"); if (!useStream && looping) { if (DEBUG || Printer.debug)Printer.debug("DataPusher.run(): setting pos back to 0"); pos = 0; continue; } if (DEBUG || Printer.debug)Printer.debug("DataPusher.run(): calling drain()"); wantedState = STATE_WAITING; source.drain(); continue; } if (DEBUG || Printer.debug) Printer.debug("> DataPusher.run(): Writing " + toWrite + " bytes"); int bytesWritten = source.write(buffer, pos, toWrite); pos += bytesWritten; if (DEBUG || Printer.debug) Printer.debug("< DataPusher.run(): Wrote " + bytesWritten + " bytes"); } threadState = STATE_STOPPING; if (DEBUG || Printer.debug)Printer.debug("DataPusher: closing device"); if (Printer.trace)Printer.trace("DataPusher: source.flush()"); source.flush(); if (DEBUG || Printer.trace)Printer.trace("DataPusher: source.stop()"); source.stop(); if (DEBUG || Printer.trace)Printer.trace("DataPusher: source.flush()"); source.flush(); if (DEBUG || Printer.trace)Printer.trace("DataPusher: source.close()"); source.close(); threadState = STATE_STOPPED; synchronized (this) { pushThread = null; notifyAll(); } if (DEBUG || Printer.debug)Printer.debug("DataPusher:end of thread"); } } // class DataPusher