| /* |
| * 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.RemoteException; |
| import android.util.Log; |
| |
| import dalvik.system.CloseGuard; |
| |
| import libcore.io.IoUtils; |
| |
| import java.io.Closeable; |
| import java.io.FileDescriptor; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| |
| /** |
| * This class is used for sending data to a port on a MIDI device |
| */ |
| public final class MidiInputPort extends MidiReceiver implements Closeable { |
| private static final String TAG = "MidiInputPort"; |
| |
| private IMidiDeviceServer mDeviceServer; |
| private final IBinder mToken; |
| private final int mPortNumber; |
| private FileDescriptor mFileDescriptor; |
| private FileOutputStream mOutputStream; |
| |
| private final CloseGuard mGuard = CloseGuard.get(); |
| private boolean mIsClosed; |
| |
| // buffer to use for sending data out our output stream |
| private final byte[] mBuffer = new byte[MidiPortImpl.MAX_PACKET_SIZE]; |
| |
| /* package */ MidiInputPort(IMidiDeviceServer server, IBinder token, |
| FileDescriptor fd, int portNumber) { |
| super(MidiPortImpl.MAX_PACKET_DATA_SIZE); |
| |
| mDeviceServer = server; |
| mToken = token; |
| mFileDescriptor = fd; |
| mPortNumber = portNumber; |
| mOutputStream = new FileOutputStream(fd); |
| mGuard.open("close"); |
| } |
| |
| /* package */ MidiInputPort(FileDescriptor fd, int portNumber) { |
| this(null, null, fd, portNumber); |
| } |
| |
| /** |
| * Returns the port number of this port |
| * |
| * @return the port's port number |
| */ |
| public final int getPortNumber() { |
| return mPortNumber; |
| } |
| |
| @Override |
| public void onSend(byte[] msg, int offset, int count, long timestamp) throws IOException { |
| if (offset < 0 || count < 0 || offset + count > msg.length) { |
| throw new IllegalArgumentException("offset or count out of range"); |
| } |
| if (count > MidiPortImpl.MAX_PACKET_DATA_SIZE) { |
| throw new IllegalArgumentException("count exceeds max message size"); |
| } |
| |
| synchronized (mBuffer) { |
| if (mOutputStream == null) { |
| throw new IOException("MidiInputPort is closed"); |
| } |
| int length = MidiPortImpl.packData(msg, offset, count, timestamp, mBuffer); |
| mOutputStream.write(mBuffer, 0, length); |
| } |
| } |
| |
| @Override |
| public void onFlush() throws IOException { |
| synchronized (mBuffer) { |
| if (mOutputStream == null) { |
| throw new IOException("MidiInputPort is closed"); |
| } |
| int length = MidiPortImpl.packFlush(mBuffer); |
| mOutputStream.write(mBuffer, 0, length); |
| } |
| } |
| |
| // used by MidiDevice.connectInputPort() to connect our socket directly to another device |
| /* package */ FileDescriptor claimFileDescriptor() { |
| synchronized (mGuard) { |
| FileDescriptor fd; |
| synchronized (mBuffer) { |
| fd = mFileDescriptor; |
| if (fd == null) return null; |
| IoUtils.closeQuietly(mOutputStream); |
| mFileDescriptor = null; |
| mOutputStream = null; |
| } |
| |
| // Set mIsClosed = true so we will not call mDeviceServer.closePort() in close(). |
| // MidiDevice.MidiConnection.close() will do the cleanup instead. |
| mIsClosed = true; |
| return fd; |
| } |
| } |
| |
| // used by MidiDevice.MidiConnection to close this port after the connection is closed |
| /* package */ IBinder getToken() { |
| return mToken; |
| } |
| |
| // used by MidiDevice.MidiConnection to close this port after the connection is closed |
| /* package */ IMidiDeviceServer getDeviceServer() { |
| return mDeviceServer; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| synchronized (mGuard) { |
| if (mIsClosed) return; |
| mGuard.close(); |
| synchronized (mBuffer) { |
| if (mFileDescriptor != null) { |
| IoUtils.closeQuietly(mFileDescriptor); |
| mFileDescriptor = null; |
| } |
| if (mOutputStream != null) { |
| mOutputStream.close(); |
| mOutputStream = null; |
| } |
| } |
| if (mDeviceServer != null) { |
| try { |
| mDeviceServer.closePort(mToken); |
| } catch (RemoteException e) { |
| Log.e(TAG, "RemoteException in MidiInputPort.close()"); |
| } |
| } |
| mIsClosed = true; |
| } |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| if (mGuard != null) { |
| mGuard.warnIfOpen(); |
| } |
| |
| // not safe to make binder calls from finalize() |
| mDeviceServer = null; |
| close(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| } |