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.example.android.midisynth;
18 
19 import android.media.midi.MidiDeviceService;
20 import android.media.midi.MidiDeviceStatus;
21 import android.media.midi.MidiReceiver;
22 
23 import com.example.android.common.midi.synth.SynthEngine;
24 
25 public class MidiSynthDeviceService extends MidiDeviceService {
26 
27     private static final String TAG = MainActivity.TAG;
28     private SynthEngine mSynthEngine = new SynthEngine();
29     private boolean mSynthStarted = false;
30 
31     @Override
onCreate()32     public void onCreate() {
33         super.onCreate();
34     }
35 
36     @Override
onDestroy()37     public void onDestroy() {
38         mSynthEngine.stop();
39         super.onDestroy();
40     }
41 
42     @Override
onGetInputPortReceivers()43     public MidiReceiver[] onGetInputPortReceivers() {
44         return new MidiReceiver[]{mSynthEngine};
45     }
46 
47     /**
48      * This will get called when clients connect or disconnect.
49      */
50     @Override
onDeviceStatusChanged(MidiDeviceStatus status)51     public void onDeviceStatusChanged(MidiDeviceStatus status) {
52         if (status.isInputPortOpen(0) && !mSynthStarted) {
53             mSynthEngine.start();
54             mSynthStarted = true;
55         } else if (!status.isInputPortOpen(0) && mSynthStarted) {
56             mSynthEngine.stop();
57             mSynthStarted = false;
58         }
59     }
60 
61 }
62