| /* |
| * 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 |
| * @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; |
| } |
| } |