| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package javax.sound.midi; |
| |
| import java.util.ArrayList; |
| |
| import org.apache.harmony.sound.internal.nls.Messages; |
| |
| public class Track { |
| private ArrayList<MidiEvent> events; //vector of events contain in the Track |
| |
| private MidiEvent badEvent; //variable to save event which I try to add |
| //to empty Track; see description below |
| |
| private long tick; |
| |
| Track() { |
| /* |
| * create an empty Track; new Track must contain only meta-event End of Track. |
| * MetaMessage with MetaMessage.data contains -1, 47 and 0 is meta-event |
| */ |
| events = new ArrayList<MidiEvent>(); |
| events.add(new MidiEvent(new MetaMessage(new byte[] {-1, 47, 0}), 0)); |
| } |
| public boolean add(MidiEvent event) { |
| //FIXME |
| /* |
| * Some words about badEvent. |
| * When I write tests, I find following situation in the RI: |
| * if I want to add to empty Track new event that is not meta-event End of Track, |
| * I catch exception ArrayIndexOutOfBoundsException with meaning -1, and my |
| * event doesn't add to Track, but meta-event adds. If I try to add the same |
| * event after it, method Track.add(MidiEvent) return 'false', and my event |
| * doesn't add again. So, I want to delete this event and use method |
| * Track.remove(MidiEvent) for it, but it return 'false' too! And only after |
| * this "shamanism" I can add this event to Track normally. |
| * And only for this situation I use variable badEvent. |
| * |
| * See test org.apache.harmony.sound.tests.javax.sound.midi.TrackTest |
| * for more details |
| */ |
| |
| /* |
| * if event equals null or badEvent, this method return 'false' |
| */ |
| if (event == null || event == badEvent) { |
| return false; |
| } |
| /* |
| * If event equals meta-event End of Track and Track in this moment |
| * doesn't contain some events, i.e. Track.size() return 0, this |
| * event accrue to Track; |
| * if Track is not empty, but it doesn't contain meta-event, |
| * this event accrue to the end of Track; |
| * in any case addition of this meta-event is successful, this method |
| * return 'true' even if meta-event End of Track already contains in the Track |
| */ |
| if (event.getMessage().getMessage()[0] == -1 && |
| event.getMessage().getMessage()[1] == 47 && |
| event.getMessage().getMessage()[2] == 0 ) { |
| if (events.size() == 0) { |
| return events.add(event); |
| } |
| byte[] bt = events.get(events.size() - 1).getMessage().getMessage(); |
| if ((bt[0] != -1) && (bt[1] != 47) && (bt[2] != 0)) { |
| return events.add(event); |
| } |
| return true; |
| } |
| /* |
| * after use method Track.add(MidiEvent) Track must contain meta-event |
| * End of Track; so, at first I add this event to Track if it doesn't |
| * contain meta-event and parameter 'event' is not meta-event |
| */ |
| if (events.size() == 0) { |
| events.add(new MidiEvent(new MetaMessage(new byte[] {-1, 47, 0}), 0)); |
| badEvent = event; |
| // sounds.01=-1 |
| throw new ArrayIndexOutOfBoundsException(Messages.getString("sound.01")); //$NON-NLS-1$ |
| } |
| byte[] bt = events.get(events.size() - 1).getMessage().getMessage(); |
| if ((bt[0] != -1) && (bt[1] != 47) && (bt[2] != 0)) { |
| events.add(new MidiEvent(new MetaMessage(new byte[] {-1, 47, 0}), 0)); |
| } |
| |
| if (events.contains(event)) { |
| return false; |
| } |
| |
| /* |
| * events in the Track must take up position in ascending ticks |
| */ |
| if (events.size() == 1) { |
| events.add(0, event); |
| } |
| for (int i = 0; i < events.size() - 1; i++ ) { |
| if (events.get(i).getTick() <= event.getTick()) { |
| continue; |
| } |
| events.add(i, event); |
| break; |
| } |
| /* |
| * method Track.ticks() return the biggest value of tick of all events |
| * and save it even I remove event with the biggest values of tick |
| */ |
| if (tick < event.getTick()) { |
| tick = event.getTick(); |
| } |
| return true; |
| } |
| |
| public MidiEvent get(int index) throws ArrayIndexOutOfBoundsException { |
| if (index < 0 || index >= events.size()) { |
| // sound.02=Index: {0}, Size: {1} |
| throw new ArrayIndexOutOfBoundsException(Messages.getString("sound.02", index, events.size())); //$NON-NLS-1$ |
| } |
| return events.get(index); |
| } |
| |
| public boolean remove(MidiEvent event) { |
| /* |
| * if I remove event that equals badEvent, I "delete" badEvent |
| */ |
| if (event == badEvent) { |
| badEvent = null; |
| return false; |
| } |
| /* |
| * method Track.ticks() always return the biggest value that ever has been |
| * in the Track; so only when Track is empty Track.ticks() return 0 |
| */ |
| if (events.remove(event)) { |
| if (events.size() == 0) { |
| tick = 0; |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| public int size() { |
| return events.size(); |
| } |
| |
| public long ticks() { |
| return tick; |
| } |
| } |
