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// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
package org.yuzu.yuzu_emu.utils
import android.app.ActivityManager
import android.content.Context
import android.os.Build
import org.yuzu.yuzu_emu.R
import org.yuzu.yuzu_emu.YuzuApplication
import java.util.Locale
import kotlin.math.ceil
object MemoryUtil {
private val context get() = YuzuApplication.appContext
private val Float.hundredths: String
get() = String.format(Locale.ROOT, "%.2f", this)
// Required total system memory
const val REQUIRED_MEMORY = 8
const val Kb: Float = 1024F
const val Mb = Kb * 1024
const val Gb = Mb * 1024
const val Tb = Gb * 1024
const val Pb = Tb * 1024
const val Eb = Pb * 1024
private fun bytesToSizeUnit(size: Float, roundUp: Boolean = false): String =
when {
size < Kb -> {
context.getString(
R.string.memory_formatted,
size.hundredths,
context.getString(R.string.memory_byte)
)
}
size < Mb -> {
context.getString(
R.string.memory_formatted,
if (roundUp) ceil(size / Kb) else (size / Kb).hundredths,
context.getString(R.string.memory_kilobyte)
)
}
size < Gb -> {
context.getString(
R.string.memory_formatted,
if (roundUp) ceil(size / Mb) else (size / Mb).hundredths,
context.getString(R.string.memory_megabyte)
)
}
size < Tb -> {
context.getString(
R.string.memory_formatted,
if (roundUp) ceil(size / Gb) else (size / Gb).hundredths,
context.getString(R.string.memory_gigabyte)
)
}
size < Pb -> {
context.getString(
R.string.memory_formatted,
if (roundUp) ceil(size / Tb) else (size / Tb).hundredths,
context.getString(R.string.memory_terabyte)
)
}
size < Eb -> {
context.getString(
R.string.memory_formatted,
if (roundUp) ceil(size / Pb) else (size / Pb).hundredths,
context.getString(R.string.memory_petabyte)
)
}
else -> {
context.getString(
R.string.memory_formatted,
if (roundUp) ceil(size / Eb) else (size / Eb).hundredths,
context.getString(R.string.memory_exabyte)
)
}
}
val totalMemory: Float
get() {
val memInfo = ActivityManager.MemoryInfo()
with(context.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager) {
getMemoryInfo(memInfo)
}
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
memInfo.advertisedMem.toFloat()
} else {
memInfo.totalMem.toFloat()
}
}
fun isLessThan(minimum: Int, size: Float): Boolean =
when (size) {
Kb -> totalMemory < Mb && totalMemory < minimum
Mb -> totalMemory < Gb && (totalMemory / Mb) < minimum
Gb -> totalMemory < Tb && (totalMemory / Gb) < minimum
Tb -> totalMemory < Pb && (totalMemory / Tb) < minimum
Pb -> totalMemory < Eb && (totalMemory / Pb) < minimum
Eb -> totalMemory / Eb < minimum
else -> totalMemory < Kb && totalMemory < minimum
}
// Devices are unlikely to have 0.5GB increments of memory so we'll just round up to account for
// the potential error created by memInfo.totalMem
fun getDeviceRAM(): String = bytesToSizeUnit(totalMemory, true)
}
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