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package com.google.oboe.samples.soundboard;
/*
* Copyright 2021 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.
*/
import androidx.appcompat.app.AppCompatActivity;
import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.media.AudioManager;
import android.os.Build;
import android.os.Bundle;
import android.util.DisplayMetrics;
import java.util.ArrayList;
import static java.lang.Math.min;
public class MainActivity extends AppCompatActivity {
private final String TAG = MainActivity.class.toString();
private final int NUM_ROWS = 6;
private final int NUM_COLUMNS = 5;
private static long mEngineHandle = 0;
private native long startEngine(int numSignals);
private native void stopEngine(long engineHandle);
private static native void native_setDefaultStreamValues(int sampleRate, int framesPerBurst);
// Used to load the 'native-lib' library on application startup.
static {
System.loadLibrary("soundboard");
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onResume(){
setDefaultStreamValues(this);
mEngineHandle = startEngine(NUM_ROWS * NUM_COLUMNS);
createMusicTiles(this);
super.onResume();
}
@Override
protected void onPause(){
stopEngine(mEngineHandle);
super.onPause();
}
static void setDefaultStreamValues(Context context) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){
AudioManager myAudioMgr = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
String sampleRateStr = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE);
int defaultSampleRate = Integer.parseInt(sampleRateStr);
String framesPerBurstStr = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER);
int defaultFramesPerBurst = Integer.parseInt(framesPerBurstStr);
native_setDefaultStreamValues(defaultSampleRate, defaultFramesPerBurst);
}
}
void createMusicTiles(Context context) {
DisplayMetrics displayMetrics = new DisplayMetrics();
((Activity)context).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;
// 5 by 6 tiles
final int numRows = NUM_ROWS;
final int numColumns = NUM_COLUMNS;
final int tileLength = min(height / (numRows), width / (numColumns));
final int xStartLocation = (width - tileLength * numColumns) / 2;
// Height isn't a perfect measurement so shift the location slightly up from the "center"
final int yStartLocation = (height - tileLength * numRows) / 2 / 2;
ArrayList<Rect> rectangles = new ArrayList<Rect>();
for (int i = 0; i < numRows; i++) {
for (int j = 0; j < numColumns; j++) {
Rect rectangle = new Rect(xStartLocation + j * tileLength,
yStartLocation + i * tileLength,
xStartLocation + j * tileLength + tileLength,
yStartLocation + i * tileLength + tileLength);
rectangles.add(rectangle);
}
}
setContentView(new MusicTileView(this, rectangles, new NoteListener(mEngineHandle)));
}
}
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