137 lines
5.2 KiB
Java
137 lines
5.2 KiB
Java
/*
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* Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import javax.sound.midi.MidiDevice;
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import javax.sound.midi.MidiSystem;
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import javax.sound.midi.Sequencer;
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import javax.sound.midi.Synthesizer;
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/**
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* @test
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* @key sound
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* @bug 4903786
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* @summary MIDI OUT does not implement getMicrosecondPosition() consistently
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*/
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public class MidiOutGetMicrosecondPositionBug {
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static int successfulTests = 0;
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private static void testDevice(MidiDevice device) throws Exception {
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boolean timestampsAvailable = false;
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boolean timestampPrecisionOk = false;
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try {
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// expected behaviour if not opened?
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device.open();
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/* First, we're testing if timestamps are provided at all.
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Returning -1 (unsupported), while allowed by the API
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specification, is not sufficient to pass this test. */
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long timestamp = device.getMicrosecondPosition();
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timestampsAvailable = (timestamp != -1);
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/* Then, we're testing the precision. Note that the system time
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is measured in milliseconds, while the device time is measured
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in microseconds. */
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long systemTime1 = System.currentTimeMillis();
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long deviceTime1 = device.getMicrosecondPosition();
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// rest for 5 seconds
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Thread.sleep(5000);
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long systemTime2 = System.currentTimeMillis();
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long deviceTime2 = device.getMicrosecondPosition();
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// now both period measurements are calculated in milliseconds.
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long systemDuration = systemTime2 - systemTime1;
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long deviceDuration = (deviceTime2 - deviceTime1) / 1000;
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long delta = Math.abs(systemDuration - deviceDuration);
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// a deviation of 0.5 seconds (= 500 ms) is allowed.
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timestampPrecisionOk = (delta <= 500);
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} catch (Throwable t) {
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System.out.println(" - Caught exception. Not failed.");
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System.out.println(" - " + t.toString());
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return;
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} finally {
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device.close();
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}
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if (! timestampsAvailable) {
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throw new Exception("timestamps are not supported");
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}
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if (! timestampPrecisionOk) {
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throw new Exception("device timer not precise enough");
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}
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successfulTests++;
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}
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private static void doAll() throws Exception {
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MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();
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for (int i=0; i < infos.length; i++) {
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MidiDevice device = MidiSystem.getMidiDevice(infos[i]);
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if ((! (device instanceof Sequencer)) &&
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(! (device instanceof Synthesizer)) &&
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(device.getMaxReceivers() > 0 || device.getMaxReceivers() == -1)) {
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System.out.println("--------------");
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System.out.println("Testing MIDI device: " + infos[i]);
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testDevice(device);
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}
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if (infos.length==0) {
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System.out.println("No MIDI devices available!");
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}
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}
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}
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public static void main(String[] args) throws Exception {
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if (!isMidiInstalled()) {
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return;
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}
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doAll();
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if (successfulTests==0) {
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System.out.println("Could not execute any of the tests. Test NOT failed.");
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} else {
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System.out.println("Test PASSED.");
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}
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}
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/**
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* Returns true if at least one MIDI (port) device is correctly installed on
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* the system.
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*/
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public static boolean isMidiInstalled() {
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boolean result = false;
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MidiDevice.Info[] devices = MidiSystem.getMidiDeviceInfo();
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for (int i = 0; i < devices.length; i++) {
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try {
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MidiDevice device = MidiSystem.getMidiDevice(devices[i]);
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result = ! (device instanceof Sequencer) && ! (device instanceof Synthesizer);
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} catch (Exception e1) {
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System.err.println(e1);
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}
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if (result)
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break;
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}
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if (!result) {
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System.err.println("Soundcard does not exist or sound drivers not installed!");
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System.err.println("This test requires sound drivers for execution.");
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}
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return result;
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}
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}
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