| /* |
| * 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.midi; |
| |
| import android.os.ParcelFileDescriptor; |
| |
| import libcore.io.IoUtils; |
| |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| |
| /** |
| * This class is used for sending data to a port on a MIDI device |
| * |
| * @hide |
| */ |
| public class MidiInputPort extends MidiPort implements MidiReceiver { |
| |
| private final FileOutputStream mOutputStream; |
| |
| // buffer to use for sending messages out our output stream |
| private final byte[] mBuffer = new byte[MAX_PACKET_SIZE]; |
| |
| /* package */ MidiInputPort(ParcelFileDescriptor pfd, int portNumber) { |
| super(portNumber); |
| mOutputStream = new ParcelFileDescriptor.AutoCloseOutputStream(pfd); |
| } |
| |
| /** |
| * Writes a MIDI message to the input port |
| * |
| * @param msg byte array containing the message |
| * @param offset offset of first byte of the message in msg byte array |
| * @param count size of the message in bytes |
| * @param timestamp future time to post the message (based on |
| * {@link java.lang.System#nanoTime} |
| */ |
| public void onPost(byte[] msg, int offset, int count, long timestamp) throws IOException { |
| assert(offset >= 0 && count >= 0 && offset + count <= msg.length); |
| |
| synchronized (mBuffer) { |
| try { |
| while (count > 0) { |
| int length = packMessage(msg, offset, count, timestamp, mBuffer); |
| mOutputStream.write(mBuffer, 0, length); |
| int sent = getMessageSize(mBuffer, length); |
| assert(sent >= 0 && sent <= length); |
| |
| offset += sent; |
| count -= sent; |
| } |
| } catch (IOException e) { |
| IoUtils.closeQuietly(mOutputStream); |
| // report I/O failure |
| onIOException(); |
| throw e; |
| } |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| mOutputStream.close(); |
| } |
| } |