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          */
writePacket(byte[] buffer, int count)34         public void writePacket(byte[] buffer, int count);
35     }
36 
37     /**
38      * Called to inform PacketEncoder when the previous write is complete.
39      */
writeComplete()40     abstract public void writeComplete();
41 }
42