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/*
* 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.
*/
package com.google.oboe.samples.soundboard
import android.app.Activity
import android.content.Context
import android.content.res.Configuration
import android.graphics.Point
import android.graphics.Rect
import android.media.AudioManager
import android.os.Build
import android.os.Bundle
import androidx.annotation.RequiresApi
import androidx.appcompat.app.AppCompatActivity
import kotlin.math.min
class MainActivity : AppCompatActivity() {
private external fun startEngine(numSignals: Int): Long
private external fun stopEngine(engineHandle: Long)
private external fun native_setDefaultStreamValues(sampleRate: Int, framesPerBurst: Int)
companion object {
private const val DIMENSION_MIN_SIZE = 6
private const val DIMENSION_MAX_SIZE = 8
private var mNumColumns : Int = 0;
private var mNumRows : Int = 0;
private var mRectangles = ArrayList<Rect>()
private var mEngineHandle: Long = 0
// Used to load the 'native-lib' library on application startup.
init {
System.loadLibrary("soundboard")
}
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
}
override fun onResume() {
super.onResume()
setup()
}
override fun onPause() {
stopEngine(mEngineHandle)
super.onPause()
}
private fun setup() {
setDefaultStreamValues(this)
calculateAndSetRectangles(this)
mEngineHandle = startEngine(mNumRows * mNumColumns)
createMusicTiles(this)
}
private fun setDefaultStreamValues(context: Context) {
val myAudioMgr = context.getSystemService(AUDIO_SERVICE) as AudioManager
val sampleRateStr = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE)
val defaultSampleRate = sampleRateStr.toInt()
val framesPerBurstStr =
myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER)
val defaultFramesPerBurst = framesPerBurstStr.toInt()
native_setDefaultStreamValues(defaultSampleRate, defaultFramesPerBurst)
}
private fun calculateAndSetRectangles(context: Context) {
val width: Int
val height: Int
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
width = windowManager.currentWindowMetrics.bounds.width()
height = windowManager.currentWindowMetrics.bounds.height()
} else {
val size = Point()
windowManager.defaultDisplay.getRealSize(size)
height = size.y
width = size.x
}
if (height > width) {
mNumColumns = DIMENSION_MIN_SIZE
mNumRows = min(DIMENSION_MIN_SIZE * height / width, DIMENSION_MAX_SIZE)
} else {
mNumRows = DIMENSION_MIN_SIZE
mNumColumns = min(DIMENSION_MIN_SIZE * width / height, DIMENSION_MAX_SIZE)
}
val tileLength = min(height / mNumRows, width / mNumColumns)
val xStartLocation = (width - tileLength * mNumColumns) / 2
val yStartLocation = 0
mRectangles = ArrayList<Rect>()
for (i in 0 until mNumRows) {
for (j in 0 until mNumColumns) {
val rectangle = Rect(
xStartLocation + j * tileLength,
yStartLocation + i * tileLength,
xStartLocation + j * tileLength + tileLength,
yStartLocation + i * tileLength + tileLength
)
mRectangles.add(rectangle)
}
}
}
private fun createMusicTiles(context: Context) {
setContentView(MusicTileView(this, mRectangles, NoteListener(mEngineHandle),
ScreenChangeListener { setup() }))
}
class ScreenChangeListener(private var mFunc: () -> Unit) : MusicTileView.ConfigChangeListener {
override fun onConfigurationChanged() {
mFunc()
}
}
}
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