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MidiScope / src / com.example.android.common.midi /

MidiEventThread.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.common.midi;
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import android.media.midi.MidiSender;
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import android.util.Log;
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import java.io.IOException;
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public class MidiEventThread extends MidiEventScheduler {
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    protected static final String TAG = "MidiEventThread";
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    private EventThread mEventThread;
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    MidiDispatcher mDispatcher = new MidiDispatcher();
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    class EventThread extends Thread {
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        private boolean go = true;
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        @Override
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        public void run() {
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            while (go) {
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                try {
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                    MidiEvent event = (MidiEvent) waitNextEvent();
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                    try {
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                        Log.i(TAG, "Fire event " + event.data[0] + " at "
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                                + event.getTimestamp());
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                        mDispatcher.send(event.data, 0,
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                                event.count, event.getTimestamp());
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                    } catch (IOException e) {
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                        e.printStackTrace();
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                    }
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                    // Put event back in the pool for future use.
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                    addEventToPool(event);
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                } catch (InterruptedException e) {
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                    // OK, this is how we stop the thread.
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                }
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            }
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        }
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        /**
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         * Asynchronously tell the thread to stop.
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         */
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        public void requestStop() {
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            go = false;
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            interrupt();
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        }
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    }
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    public void start() {
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        stop();
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        mEventThread = new EventThread();
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        mEventThread.start();
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    }
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    /**
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     * Asks the thread to stop then waits for it to stop.
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     */
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    public void stop() {
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        if (mEventThread != null) {
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            mEventThread.requestStop();
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            try {
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                mEventThread.join(500);
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            } catch (InterruptedException e) {
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                Log.e(TAG,
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                        "Interrupted while waiting for MIDI EventScheduler thread to stop.");
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            } finally {
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                mEventThread = null;
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            }
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        }
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    }
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    public MidiSender getSender() {
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        return mDispatcher.getSender();
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    }
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}
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