MidiSynthDeviceService.java

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/*
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 * Copyright (C) 2015 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.midisynth;
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import android.media.midi.MidiDeviceService;
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import android.media.midi.MidiDeviceStatus;
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import android.media.midi.MidiReceiver;
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import com.example.android.common.midi.synth.SynthEngine;
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public class MidiSynthDeviceService extends MidiDeviceService {
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    private static final String TAG = MainActivity.TAG;
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    private SynthEngine mSynthEngine = new SynthEngine();
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    private boolean mSynthStarted = false;
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    @Override
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    public void onCreate() {
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        super.onCreate();
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    }
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    @Override
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    public void onDestroy() {
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        mSynthEngine.stop();
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        super.onDestroy();
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    }
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    @Override
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    public MidiReceiver[] onGetInputPortReceivers() {
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        return new MidiReceiver[]{mSynthEngine};
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    }
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    /**
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     * This will get called when clients connect or disconnect.
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     */
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    @Override
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    public void onDeviceStatusChanged(MidiDeviceStatus status) {
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        if (status.isInputPortOpen(0) && !mSynthStarted) {
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            mSynthEngine.start();
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            mSynthStarted = true;
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        } else if (!status.isInputPortOpen(0) && mSynthStarted) {
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            mSynthEngine.stop();
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            mSynthStarted = false;
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        }
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    }
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}
Mar	APR	May
	09
2015	2016	2017
Results

MidiSynthDeviceService.java
