apps/CtsVerifier/src/com/android/cts/verifier/audio/AudioOutputRoutingNotificationsActivity.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.cts.verifier.audio;

import android.content.Context;
import android.media.AudioDeviceInfo;
import android.media.AudioTrack;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

import com.android.cts.verifier.R;

import org.hyphonate.megaaudio.player.AudioSourceProvider;
import org.hyphonate.megaaudio.player.JavaPlayer;
import org.hyphonate.megaaudio.player.PlayerBuilder;
import org.hyphonate.megaaudio.player.sources.SinAudioSourceProvider;

/**
 * Tests AudioTrack and AudioRecord (re)Routing messages.
 */
public class AudioOutputRoutingNotificationsActivity extends AudioWiredDeviceBaseActivity {
    private static final String TAG = "AudioOutputRoutingNotificationsActivity";

    static final int NUM_CHANNELS = 2;
    static final int SAMPLE_RATE = 48000;

    Context mContext;

    Button playBtn;
    Button stopBtn;
    TextView mInfoView;

    int mNumRoutingNotifications;

    private OnBtnClickListener mBtnClickListener = new OnBtnClickListener();

    // ignore messages sent as a consequence of starting the player
    private static final int NUM_IGNORE_MESSAGES = 1;

    // Mega Player
    private JavaPlayer mAudioPlayer;
    private AudioTrackRoutingChangeListener mRoutingChangeListener;
    private boolean mIsPlaying;

    private boolean mInitialRoutingMessageHandled;

    private class OnBtnClickListener implements OnClickListener {
        @Override
        public void onClick(View v) {
            if (mAudioPlayer == null) {
                return; // failed to create the player
            }
            int id = v.getId();
            if (id == R.id.audio_routingnotification_playBtn) {
                startPlayback();
            } else if (id == R.id.audio_routingnotification_playStopBtn) {
                stopPlayback();
            }
        }
    }

    private void startPlayback() {
        if (!mIsPlaying) {
            mNumRoutingNotifications = 0;

            mAudioPlayer.startStream();

            AudioTrack audioTrack = mAudioPlayer.getAudioTrack();
            audioTrack.addOnRoutingChangedListener(mRoutingChangeListener,
                    new Handler());

            mIsPlaying = true;

            enablePlayButtons(!mIsPlaying, mIsPlaying);
        }
    }

    private void stopPlayback() {
        if (mIsPlaying) {
            mAudioPlayer.stopStream();

            AudioTrack audioTrack = mAudioPlayer.getAudioTrack();
            audioTrack.removeOnRoutingChangedListener(mRoutingChangeListener);

            mIsPlaying = false;

            enablePlayButtons(!mIsPlaying, mIsPlaying);
        }
    }

    private class AudioTrackRoutingChangeListener implements AudioTrack.OnRoutingChangedListener {
        public void onRoutingChanged(AudioTrack audioTrack) {
            // Starting playback triggers a messages, so ignore the first one.
            mNumRoutingNotifications++;
            if (mNumRoutingNotifications <= NUM_IGNORE_MESSAGES) {
                return;
            }

            TextView textView =
                (TextView)findViewById(R.id.audio_routingnotification_audioTrack_change);
            String msg = mContext.getResources().getString(
                    R.string.audio_routingnotification_trackRoutingMsg);
            AudioDeviceInfo routedDevice = audioTrack.getRoutedDevice();
            CharSequence deviceName = routedDevice != null ? routedDevice.getProductName() : "none";
            int deviceType = routedDevice != null ? routedDevice.getType() : -1;
            textView.setText(msg + " - " +
                             deviceName + " [0x" + Integer.toHexString(deviceType) + "]" +
                             " - " + mNumRoutingNotifications);
            getPassButton().setEnabled(true);
        }
    }

    @Override
    protected void enableTestButtons(boolean enabled) {
        enablePlayButtons(!mIsPlaying, mIsPlaying);

        mInfoView.setVisibility(enabled ? View.VISIBLE : View.INVISIBLE);
    }

    private void enablePlayButtons(boolean enablePlay, boolean enableStop) {
        playBtn.setEnabled(enablePlay);
        stopBtn.setEnabled(enableStop);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.audio_output_routingnotifications_test);

        mContext = this;

        playBtn = (Button) findViewById(R.id.audio_routingnotification_playBtn);
        playBtn.setOnClickListener(mBtnClickListener);
        stopBtn = (Button) findViewById(R.id.audio_routingnotification_playStopBtn);
        stopBtn.setOnClickListener(mBtnClickListener);

        enablePlayButtons(false, false);

        mInfoView = (TextView) findViewById(R.id.info_text);

        // Setup Player
        //
        // Allocate the source provider for the sort of signal we want to play
        //
        AudioSourceProvider sourceProvider = new SinAudioSourceProvider();
        try {
            PlayerBuilder builder = new PlayerBuilder();
            mAudioPlayer = (JavaPlayer)builder
                    // choose one or the other of these for a Java or an Oboe player
                    .setPlayerType(PlayerBuilder.TYPE_JAVA)
                    // .setPlayerType(PlayerBuilder.PLAYER_OBOE)
                    .setSourceProvider(sourceProvider)
                    .build();
            //TODO - explain the choice of 96 here.
            mAudioPlayer.setupStream(NUM_CHANNELS, SAMPLE_RATE, 96);
        } catch (PlayerBuilder.BadStateException ex) {
            Log.e(TAG, "Failed MegaPlayer build.");
        }

        mRoutingChangeListener = new AudioTrackRoutingChangeListener();

        // "Honor System" buttons
        super.setup();
        setPassFailButtonClickListeners();
    }

    @Override
    public void onBackPressed () {
        stopPlayback();
        super.onBackPressed();
    }
}