111fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood/* 211fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * Copyright (C) 2015 The Android Open Source Project 311fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * 411fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * Licensed under the Apache License, Version 2.0 (the "License"); 511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * you may not use this file except in compliance with the License. 611fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * You may obtain a copy of the License at 711fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * 811fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * http://www.apache.org/licenses/LICENSE-2.0 911fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * 1011fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * Unless required by applicable law or agreed to in writing, software 1111fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * distributed under the License is distributed on an "AS IS" BASIS, 1211fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1311fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * See the License for the specific language governing permissions and 1411fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * limitations under the License. 1511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood */ 1611fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 17d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwoodpackage com.android.internal.midi; 18d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwood 19d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwoodimport android.media.midi.MidiReceiver; 20d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwoodimport android.media.midi.MidiSender; 2111fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 2211fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwoodimport java.io.IOException; 23be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwoodimport java.util.concurrent.CopyOnWriteArrayList; 2411fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 2511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood/** 26d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwood * Utility class for dispatching MIDI data to a list of {@link android.media.midi.MidiReceiver}s. 27d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwood * This class subclasses {@link android.media.midi.MidiReceiver} and dispatches any data it receives 2811fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * to its receiver list. Any receivers that throw an exception upon receiving data will 2911fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * be automatically removed from the receiver list, but no IOException will be returned 307eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood * from the dispatcher's {@link android.media.midi.MidiReceiver#onSend} in that case. 3111fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood */ 32be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwoodpublic final class MidiDispatcher extends MidiReceiver { 3311fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 34be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwood private final CopyOnWriteArrayList<MidiReceiver> mReceivers 35be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwood = new CopyOnWriteArrayList<MidiReceiver>(); 3611fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 3711fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood private final MidiSender mSender = new MidiSender() { 387eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood @Override 397eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood public void onConnect(MidiReceiver receiver) { 4011fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood mReceivers.add(receiver); 4111fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood } 4211fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 437eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood @Override 447eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood public void onDisconnect(MidiReceiver receiver) { 4511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood mReceivers.remove(receiver); 4611fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood } 4711fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood }; 4811fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 4911fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood /** 50d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwood * Returns the number of {@link android.media.midi.MidiReceiver}s this dispatcher contains. 515ff9e2a1719f78cddc7a23d6572ab15ab595dafdMike Lockwood * @return the number of receivers 5211fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood */ 535ff9e2a1719f78cddc7a23d6572ab15ab595dafdMike Lockwood public int getReceiverCount() { 545ff9e2a1719f78cddc7a23d6572ab15ab595dafdMike Lockwood return mReceivers.size(); 5511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood } 5611fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 5711fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood /** 58d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwood * Returns a {@link android.media.midi.MidiSender} which is used to add and remove 59d1b16fe2fb7527eee214898263ec4d6dabbfb0b4Mike Lockwood * {@link android.media.midi.MidiReceiver}s 6011fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * to the dispatcher's receiver list. 6111fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood * @return the dispatcher's MidiSender 6211fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood */ 6311fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood public MidiSender getSender() { 6411fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood return mSender; 6511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood } 6611fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood 6711fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood @Override 687eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood public void onSend(byte[] msg, int offset, int count, long timestamp) throws IOException { 69be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwood for (MidiReceiver receiver : mReceivers) { 70be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwood try { 717eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood receiver.send(msg, offset, count, timestamp); 72be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwood } catch (IOException e) { 730c7342f0153076c88ba8e6a1647999c248787906Mike Lockwood // if the receiver fails we remove the receiver but do not propagate the exception 74be215dd57282888b05b234c39bba44cc0a864b8aMike Lockwood mReceivers.remove(receiver); 7511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood } 7611fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood } 7711fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood } 78b6f50d357bd3d4d296be6bb047f5ce93a79cbca1Mike Lockwood 79b6f50d357bd3d4d296be6bb047f5ce93a79cbca1Mike Lockwood @Override 807eb441cb4abcd3230a4d243469c5044f49e707c8Mike Lockwood public void onFlush() throws IOException { 81b6f50d357bd3d4d296be6bb047f5ce93a79cbca1Mike Lockwood for (MidiReceiver receiver : mReceivers) { 82b6f50d357bd3d4d296be6bb047f5ce93a79cbca1Mike Lockwood receiver.flush(); 83b6f50d357bd3d4d296be6bb047f5ce93a79cbca1Mike Lockwood } 84b6f50d357bd3d4d296be6bb047f5ce93a79cbca1Mike Lockwood } 8511fd96d6ff25bc1d710448eab545fe09da55a5f5Mike Lockwood} 86