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    1   /*
    2    * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
    6    * under the terms of the GNU General Public License version 2 only, as
    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   20    *
   21    * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   22    * or visit www.oracle.com if you need additional information or have any
   23    * questions.
   24    */
   25   
   26   package com.sun.media.sound;
   27   
   28   import javax.sound.midi;
   29   
   30   
   31   
   32   /**
   33    * MidiOutDevice class representing functionality of MidiOut devices.
   34    *
   35    * @author David Rivas
   36    * @author Kara Kytle
   37    * @author Florian Bomers
   38    */
   39   class MidiOutDevice extends AbstractMidiDevice {
   40   
   41       // CONSTRUCTOR
   42   
   43       MidiOutDevice(AbstractMidiDeviceProvider.Info info) {
   44                   super(info);
   45                   if(Printer.trace) Printer.trace("MidiOutDevice CONSTRUCTOR");
   46       }
   47   
   48   
   49       // IMPLEMENTATION OF ABSTRACT MIDI DEVICE METHODS
   50   
   51       protected synchronized void implOpen() throws MidiUnavailableException {
   52           if (Printer.trace) Printer.trace("> MidiOutDevice: implOpen()");
   53           int index = ((AbstractMidiDeviceProvider.Info)getDeviceInfo()).getIndex();
   54           id = nOpen(index); // can throw MidiUnavailableException
   55           if (id == 0) {
   56               throw new MidiUnavailableException("Unable to open native device");
   57           }
   58           if (Printer.trace) Printer.trace("< MidiOutDevice: implOpen(): completed.");
   59       }
   60   
   61   
   62       protected synchronized void implClose() {
   63           if (Printer.trace) Printer.trace("> MidiOutDevice: implClose()");
   64           // prevent further action
   65           long oldId = id;
   66           id = 0;
   67   
   68           super.implClose();
   69   
   70           // close the device
   71           nClose(oldId);
   72           if (Printer.trace) Printer.trace("< MidiOutDevice: implClose(): completed");
   73       }
   74   
   75   
   76       public long getMicrosecondPosition() {
   77           long timestamp = -1;
   78           if (isOpen()) {
   79               timestamp = nGetTimeStamp(id);
   80           }
   81           return timestamp;
   82       }
   83   
   84   
   85   
   86       // OVERRIDES OF ABSTRACT MIDI DEVICE METHODS
   87   
   88       /** Returns if this device supports Receivers.
   89           This implementation always returns true.
   90           @return true, if the device supports Receivers, false otherwise.
   91       */
   92       protected boolean hasReceivers() {
   93           return true;
   94       }
   95   
   96   
   97       protected Receiver createReceiver() {
   98           return new MidiOutReceiver();
   99       }
  100   
  101   
  102       // INNER CLASSES
  103   
  104       class MidiOutReceiver extends AbstractReceiver {
  105   
  106           protected void implSend(MidiMessage message, long timeStamp) {
  107               int length = message.getLength();
  108               int status = message.getStatus();
  109               if (length <= 3 && status != 0xF0 && status != 0xF7) {
  110                   int packedMsg;
  111                   if (message instanceof ShortMessage) {
  112                       if (message instanceof FastShortMessage) {
  113                           packedMsg = ((FastShortMessage) message).getPackedMsg();
  114                       } else {
  115                           ShortMessage msg = (ShortMessage) message;
  116                           packedMsg = (status & 0xFF)
  117                               | ((msg.getData1() & 0xFF) << 8)
  118                               | ((msg.getData2() & 0xFF) << 16);
  119                       }
  120                   } else {
  121                       packedMsg = 0;
  122                       byte[] data = message.getMessage();
  123                       if (length>0) {
  124                           packedMsg = data[0] & 0xFF;
  125                           if (length>1) {
  126                               /* We handle meta messages here. The message
  127                                  system reset (FF) doesn't get until here,
  128                                  because it's length is only 1. So if we see
  129                                  a status byte of FF, it's sure that we
  130                                  have a Meta message. */
  131                               if (status == 0xFF) {
  132                                   return;
  133                               }
  134                               packedMsg |= (data[1] & 0xFF) << 8;
  135                               if (length>2) {
  136                                   packedMsg |= (data[2] & 0xFF) << 16;
  137                               }
  138                           }
  139                       }
  140                   }
  141                   nSendShortMessage(id, packedMsg, timeStamp);
  142               } else {
  143                   if (message instanceof FastSysexMessage) {
  144                       nSendLongMessage(id, ((FastSysexMessage) message).getReadOnlyMessage(),
  145                                        length, timeStamp);
  146                   } else {
  147                       nSendLongMessage(id, message.getMessage(), length, timeStamp);
  148                   }
  149               }
  150           }
  151   
  152           /** shortcut for the Sun implementation */
  153           synchronized void sendPackedMidiMessage(int packedMsg, long timeStamp) {
  154               if (isOpen() && id != 0) {
  155                   nSendShortMessage(id, packedMsg, timeStamp);
  156               }
  157           }
  158   
  159   
  160       } // class MidiOutReceiver
  161   
  162   
  163       // NATIVE METHODS
  164   
  165       private native long nOpen(int index) throws MidiUnavailableException;
  166       private native void nClose(long id);
  167   
  168       private native void nSendShortMessage(long id, int packedMsg, long timeStamp);
  169       private native void nSendLongMessage(long id, byte[] data, int size, long timeStamp);
  170       private native long nGetTimeStamp(long id);
  171   
  172   } // class MidiOutDevice

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