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/*
* Copyright (c) 2003, 2016, 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.
*
* 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.
*/
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.Sequencer;
import javax.sound.midi.Synthesizer;
/**
* @test
* @key sound
* @bug 4903786
* @summary MIDI OUT does not implement getMicrosecondPosition() consistently
*/
public class MidiOutGetMicrosecondPositionBug {
static int successfulTests = 0;
private static void testDevice(MidiDevice device) throws Exception {
boolean timestampsAvailable = false;
boolean timestampPrecisionOk = false;
try {
// expected behaviour if not opened?
device.open();
/* First, we're testing if timestamps are provided at all.
Returning -1 (unsupported), while allowed by the API
specification, is not sufficient to pass this test. */
long timestamp = device.getMicrosecondPosition();
timestampsAvailable = (timestamp != -1);
/* Then, we're testing the precision. Note that the system time
is measured in milliseconds, while the device time is measured
in microseconds. */
long systemTime1 = System.currentTimeMillis();
long deviceTime1 = device.getMicrosecondPosition();
// rest for 5 seconds
Thread.sleep(5000);
long systemTime2 = System.currentTimeMillis();
long deviceTime2 = device.getMicrosecondPosition();
// now both period measurements are calculated in milliseconds.
long systemDuration = systemTime2 - systemTime1;
long deviceDuration = (deviceTime2 - deviceTime1) / 1000;
long delta = Math.abs(systemDuration - deviceDuration);
// a deviation of 0.5 seconds (= 500 ms) is allowed.
timestampPrecisionOk = (delta <= 500);
} catch (Throwable t) {
System.out.println(" - Caught exception. Not failed.");
System.out.println(" - " + t.toString());
return;
} finally {
device.close();
}
if (! timestampsAvailable) {
throw new Exception("timestamps are not supported");
}
if (! timestampPrecisionOk) {
throw new Exception("device timer not precise enough");
}
successfulTests++;
}
private static void doAll() throws Exception {
MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();
for (int i=0; i < infos.length; i++) {
MidiDevice device = MidiSystem.getMidiDevice(infos[i]);
if ((! (device instanceof Sequencer)) &&
(! (device instanceof Synthesizer)) &&
(device.getMaxReceivers() > 0 || device.getMaxReceivers() == -1)) {
System.out.println("--------------");
System.out.println("Testing MIDI device: " + infos[i]);
testDevice(device);
}
if (infos.length==0) {
System.out.println("No MIDI devices available!");
}
}
}
public static void main(String[] args) throws Exception {
if (!isMidiInstalled()) {
return;
}
doAll();
if (successfulTests==0) {
System.out.println("Could not execute any of the tests. Test NOT failed.");
} else {
System.out.println("Test PASSED.");
}
}
/**
* Returns true if at least one MIDI (port) device is correctly installed on
* the system.
*/
public static boolean isMidiInstalled() {
boolean result = false;
MidiDevice.Info[] devices = MidiSystem.getMidiDeviceInfo();
for (int i = 0; i < devices.length; i++) {
try {
MidiDevice device = MidiSystem.getMidiDevice(devices[i]);
result = ! (device instanceof Sequencer) && ! (device instanceof Synthesizer);
} catch (Exception e1) {
System.err.println(e1);
}
if (result)
break;
}
if (!result) {
System.err.println("Soundcard does not exist or sound drivers not installed!");
System.err.println("This test requires sound drivers for execution.");
}
return result;
}
}
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