1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.bluetoothmidiservice; 18 19 import android.media.midi.MidiReceiver; 20 21 /** 22 * This is an abstract base class that encodes MIDI data into a packet buffer. 23 * PacketEncoder receives data via its {@link android.media.midi.MidiReceiver#onReceive} method 24 * and notifies its client of packets to write via the {@link PacketEncoder.PacketReceiver} 25 * interface. 26 */ 27 public abstract class PacketEncoder extends MidiReceiver { 28 29 public interface PacketReceiver { 30 /** Called to write an accumulated packet. 31 * @param buffer the packet buffer to write 32 * @param count the number of bytes in the packet buffer to write 33 * @return whether the operation was successful 34 */ writePacket(byte[] buffer, int count)35 boolean writePacket(byte[] buffer, int count); 36 } 37 38 /** 39 * Called to inform PacketEncoder when the previous write is complete. 40 */ writeComplete()41 abstract public void writeComplete(); 42 } 43