| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed 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 android.media.midi; |
| |
| import android.os.IBinder; |
| import android.os.ParcelFileDescriptor; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import com.android.internal.midi.MidiDispatcher; |
| |
| import dalvik.system.CloseGuard; |
| |
| import libcore.io.IoUtils; |
| |
| import java.io.Closeable; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| |
| /** |
| * This class is used for receiving data from a port on a MIDI device |
| */ |
| public final class MidiOutputPort extends MidiSender implements Closeable { |
| private static final String TAG = "MidiOutputPort"; |
| |
| private IMidiDeviceServer mDeviceServer; |
| private final IBinder mToken; |
| private final int mPortNumber; |
| private final FileInputStream mInputStream; |
| private final MidiDispatcher mDispatcher = new MidiDispatcher(); |
| |
| private final CloseGuard mGuard = CloseGuard.get(); |
| private boolean mIsClosed; |
| |
| // This thread reads MIDI events from a socket and distributes them to the list of |
| // MidiReceivers attached to this device. |
| private final Thread mThread = new Thread() { |
| @Override |
| public void run() { |
| byte[] buffer = new byte[MidiPortImpl.MAX_PACKET_SIZE]; |
| |
| try { |
| while (true) { |
| // read next event |
| int count = mInputStream.read(buffer); |
| if (count < 0) { |
| break; |
| // FIXME - inform receivers here? |
| } |
| |
| int packetType = MidiPortImpl.getPacketType(buffer, count); |
| switch (packetType) { |
| case MidiPortImpl.PACKET_TYPE_DATA: { |
| int offset = MidiPortImpl.getDataOffset(buffer, count); |
| int size = MidiPortImpl.getDataSize(buffer, count); |
| long timestamp = MidiPortImpl.getPacketTimestamp(buffer, count); |
| |
| // dispatch to all our receivers |
| mDispatcher.send(buffer, offset, size, timestamp); |
| break; |
| } |
| case MidiPortImpl.PACKET_TYPE_FLUSH: |
| mDispatcher.flush(); |
| break; |
| default: |
| Log.e(TAG, "Unknown packet type " + packetType); |
| break; |
| } |
| } |
| } catch (IOException e) { |
| // FIXME report I/O failure? |
| Log.e(TAG, "read failed", e); |
| } finally { |
| IoUtils.closeQuietly(mInputStream); |
| } |
| } |
| }; |
| |
| /* package */ MidiOutputPort(IMidiDeviceServer server, IBinder token, |
| ParcelFileDescriptor pfd, int portNumber) { |
| mDeviceServer = server; |
| mToken = token; |
| mPortNumber = portNumber; |
| mInputStream = new ParcelFileDescriptor.AutoCloseInputStream(pfd); |
| mThread.start(); |
| mGuard.open("close"); |
| } |
| |
| /* package */ MidiOutputPort(ParcelFileDescriptor pfd, int portNumber) { |
| this(null, null, pfd, portNumber); |
| } |
| |
| /** |
| * Returns the port number of this port |
| * |
| * @return the port's port number |
| */ |
| public final int getPortNumber() { |
| return mPortNumber; |
| } |
| |
| @Override |
| public void onConnect(MidiReceiver receiver) { |
| mDispatcher.getSender().connect(receiver); |
| } |
| |
| @Override |
| public void onDisconnect(MidiReceiver receiver) { |
| mDispatcher.getSender().disconnect(receiver); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| synchronized (mGuard) { |
| if (mIsClosed) return; |
| |
| mGuard.close(); |
| mInputStream.close(); |
| if (mDeviceServer != null) { |
| try { |
| mDeviceServer.closePort(mToken); |
| } catch (RemoteException e) { |
| Log.e(TAG, "RemoteException in MidiOutputPort.close()"); |
| } |
| } |
| mIsClosed = true; |
| } |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| mGuard.warnIfOpen(); |
| // not safe to make binder calls from finalize() |
| mDeviceServer = null; |
| close(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| } |