468 lines
19 KiB
Swift
468 lines
19 KiB
Swift
import Foundation
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import IOBluetooth
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import IOKit
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import CoreAudio
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import AudioToolbox
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public final class BluetoothTracker: ObservableObject {
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public static let shared = BluetoothTracker()
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public static let didUpdateNotification = Notification.Name("BLTSTrackerDidUpdateNotification")
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@Published public var activeHeadphone: BluetoothDeviceModel?
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@Published public var devices: [BluetoothDeviceModel] = []
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// Direct primitive properties for instant reactivity
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@Published public var currentBatteryPercent: Int?
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@Published public var currentDeviceName: String = ""
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@Published public var isConnected: Bool = false
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private var timerSource: DispatchSourceTimer?
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private var knownBatteries: [String: Int] = [:]
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private typealias VoidFn = @convention(c) (AnyObject, Selector) -> Void
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private typealias IntBatteryGetter = @convention(c) (AnyObject, Selector) -> Int
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private typealias BoolGetter = @convention(c) (AnyObject, Selector) -> Bool
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private func syncFromServer(device: IOBluetoothDevice) {
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let selUpdate = Selector(("updateFromServer"))
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if device.responds(to: selUpdate) {
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let imp = device.method(for: selUpdate)
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let fn = unsafeBitCast(imp, to: VoidFn.self)
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fn(device, selUpdate)
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}
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// Force CoreBluetooth coordinator to purge cached peers and query bluetoothd
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if let cls = NSClassFromString("IOBluetoothCoreBluetoothCoordinator") as? NSObject.Type,
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let coord = cls.perform(Selector(("sharedInstance")))?.takeUnretainedValue() as? NSObject,
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let mgr = coord.perform(Selector(("classicManager")))?.takeUnretainedValue() as? NSObject {
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let selOrphan = Selector(("orphanClassicPeers"))
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if mgr.responds(to: selOrphan) {
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_ = mgr.perform(selOrphan)
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}
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let selReq = Selector(("sendLocalDeviceStateRequest"))
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if mgr.responds(to: selReq) {
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_ = mgr.perform(selReq)
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}
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}
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}
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public init() {
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setupBluetoothListeners()
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startTracking()
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}
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deinit {
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stopTracking()
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}
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public func startTracking() {
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stopTracking()
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updateDeviceList()
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pollSubprocessProbe()
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// Kernel-level DispatchSourceTimer: strictly 1 second interval
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let timer = DispatchSource.makeTimerSource(flags: .strict, queue: DispatchQueue.main)
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timer.schedule(deadline: .now() + 1.0, repeating: 1.0, leeway: .milliseconds(50))
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timer.setEventHandler { [weak self] in
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self?.updateDeviceList()
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self?.pollSubprocessProbe()
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}
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timer.resume()
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self.timerSource = timer
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}
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public func stopTracking() {
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timerSource?.cancel()
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timerSource = nil
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}
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private var isProbeRunning = false
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public func pollSubprocessProbe() {
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guard !isProbeRunning else { return }
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var probeBin: String? = nil
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var probeArgs: [String] = []
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if let exeDir = Bundle.main.executableURL?.deletingLastPathComponent().path {
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let dedicated = "\(exeDir)/battery_probe"
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if FileManager.default.isExecutableFile(atPath: dedicated) {
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probeBin = dedicated
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}
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}
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if probeBin == nil, let exePath = Bundle.main.executablePath, FileManager.default.isExecutableFile(atPath: exePath) {
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probeBin = exePath
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probeArgs = ["--battery-probe"]
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}
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guard let binary = probeBin else { return }
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isProbeRunning = true
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DispatchQueue.global(qos: .utility).async { [weak self] in
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defer { self?.isProbeRunning = false }
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let proc = Process()
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proc.executableURL = URL(fileURLWithPath: binary)
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proc.arguments = probeArgs
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let pipe = Pipe()
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proc.standardOutput = pipe
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do {
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try proc.run()
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proc.waitUntilExit()
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let data = pipe.fileHandleForReading.readDataToEndOfFile()
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if let output = String(data: data, encoding: .utf8), !output.isEmpty {
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var parsed: [String: Int] = [:]
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for line in output.components(separatedBy: .newlines) {
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let parts = line.split(separator: ":")
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if parts.count == 2, let b = Int(parts[1]) {
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parsed[String(parts[0])] = b
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}
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}
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if !parsed.isEmpty {
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DispatchQueue.main.async {
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self?.applyProbeBatteries(parsed)
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}
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}
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}
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} catch {
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// Ignore probe errors
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}
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}
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}
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private func applyProbeBatteries(_ probeResults: [String: Int]) {
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var changed = false
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for i in 0..<devices.count {
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if let fresh = probeResults[devices[i].address], fresh > 0 && fresh <= 100 {
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if devices[i].singleBattery != fresh {
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devices[i].singleBattery = fresh
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knownBatteries[devices[i].address] = fresh
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changed = true
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}
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}
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}
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if let active = activeHeadphone, let fresh = probeResults[active.address], fresh > 0 && fresh <= 100 {
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if activeHeadphone?.singleBattery != fresh {
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activeHeadphone?.singleBattery = fresh
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changed = true
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}
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if currentBatteryPercent != fresh {
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currentBatteryPercent = fresh
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changed = true
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}
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}
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if changed {
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objectWillChange.send()
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NotificationCenter.default.post(name: BluetoothTracker.didUpdateNotification, object: self)
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}
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}
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public func refreshNow() {
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updateDeviceList()
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DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in
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self?.updateDeviceList()
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}
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}
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private func setupBluetoothListeners() {
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let notificationNames = [
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"IOBluetoothDeviceWasConnectedNotification",
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"IOBluetoothDeviceWasDisconnectedNotification",
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"IOBluetoothDeviceNotification",
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"IOBluetoothDeviceServicesResolvedNotification",
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"IOBluetoothDeviceNameChangedNotification",
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"IOBluetoothHandsFreeDeviceDidUpdateNotification"
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]
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for name in notificationNames {
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(handleBluetoothChange),
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name: NSNotification.Name(name),
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object: nil
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)
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DistributedNotificationCenter.default().addObserver(
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self,
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selector: #selector(handleBluetoothChange),
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name: NSNotification.Name(name),
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object: nil
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)
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}
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}
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@objc private func handleBluetoothChange() {
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DispatchQueue.main.async { [weak self] in
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self?.updateDeviceList()
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}
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for delay in [0.2, 0.5, 1.0, 1.5, 2.0] {
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DispatchQueue.main.asyncAfter(deadline: .now() + delay) { [weak self] in
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self?.updateDeviceList()
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}
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}
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}
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public func updateDeviceList() {
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var updatedList: [BluetoothDeviceModel] = []
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let activeAudioName = getActiveCoreAudioDeviceName()
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// 1. Scan IOBluetooth paired devices
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if let pairedDevices = IOBluetoothDevice.pairedDevices() as? [IOBluetoothDevice] {
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for pairedDev in pairedDevices {
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let address = pairedDev.addressString ?? UUID().uuidString
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let device = IOBluetoothDevice(addressString: address) ?? pairedDev
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let name = device.nameOrAddress ?? pairedDev.nameOrAddress ?? "Unknown Device"
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// Actively sync latest attributes from bluetoothd
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syncFromServer(device: device)
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if device !== pairedDev {
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syncFromServer(device: pairedDev)
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}
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let isAudioOutput = activeAudioName != nil && (
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name.caseInsensitiveCompare(activeAudioName!) == .orderedSame ||
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activeAudioName!.localizedCaseInsensitiveContains(name) ||
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name.localizedCaseInsensitiveContains(activeAudioName!)
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)
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let isConnected = device.isConnected() || pairedDev.isConnected() || isAudioOutput
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let majorClass = UInt32(device.deviceClassMajor)
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let minorClass = UInt32(device.deviceClassMinor)
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let isAudio = (majorClass == 4) || isLikelyHeadphones(name: name, minorClass: minorClass, majorClass: majorClass) || isAudioOutput
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var isMulti = false
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let selMulti = Selector(("isMultiBatteryDevice"))
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if device.responds(to: selMulti) {
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let imp = device.method(for: selMulti)
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let fn = unsafeBitCast(imp, to: BoolGetter.self)
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isMulti = fn(device, selMulti)
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}
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var model = BluetoothDeviceModel(
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name: name,
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address: address,
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isConnected: isConnected,
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isAudioDevice: isAudio,
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isMultiBattery: isMulti,
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majorClass: majorClass,
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minorClass: minorClass,
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lastUpdated: Date()
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)
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if isConnected {
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extractBatteryLevels(from: device, fallbackDevice: pairedDev, into: &model, isMulti: isMulti)
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} else {
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knownBatteries.removeValue(forKey: address)
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}
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updatedList.append(model)
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}
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}
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// 2. IOKit Registry enrich
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enrichFromIORegistry(devices: &updatedList)
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// 3. Sort: Connected audio first
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updatedList.sort { d1, d2 in
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if d1.isConnected != d2.isConnected {
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return d1.isConnected && !d2.isConnected
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}
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if d1.isAudioDevice != d2.isAudioDevice {
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return d1.isAudioDevice && !d2.isAudioDevice
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}
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return d1.name.localizedCaseInsensitiveCompare(d2.name) == .orderedAscending
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}
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let foundActive = updatedList.first(where: { $0.isConnected && $0.isAudioDevice })
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?? updatedList.first(where: { $0.isConnected })
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let newPercent = foundActive?.primaryBatteryPercent
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let newName = foundActive?.name ?? ""
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let newConnected = foundActive?.isConnected == true
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let applyUpdate = { [weak self] in
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guard let self = self else { return }
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self.objectWillChange.send()
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self.devices = updatedList
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self.activeHeadphone = foundActive
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self.currentBatteryPercent = newPercent
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self.currentDeviceName = newName
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self.isConnected = newConnected
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NotificationCenter.default.post(name: BluetoothTracker.didUpdateNotification, object: self)
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}
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if Thread.isMainThread {
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applyUpdate()
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} else {
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DispatchQueue.main.async(execute: applyUpdate)
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}
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}
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public func getActiveCoreAudioDeviceName() -> String? {
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var defaultOutputDeviceID = AudioDeviceID(0)
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var propertySize = UInt32(MemoryLayout<AudioDeviceID>.size)
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var propertyAddress = AudioObjectPropertyAddress(
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mSelector: kAudioHardwarePropertyDefaultOutputDevice,
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mScope: kAudioObjectPropertyScopeGlobal,
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mElement: kAudioObjectPropertyElementMain
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)
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let status = AudioObjectGetPropertyData(
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AudioObjectID(kAudioObjectSystemObject),
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&propertyAddress,
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0,
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nil,
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&propertySize,
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&defaultOutputDeviceID
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)
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guard status == noErr else { return nil }
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var nameSize = UInt32(MemoryLayout<CFString>.size)
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var nameAddress = AudioObjectPropertyAddress(
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mSelector: kAudioDevicePropertyDeviceNameCFString,
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mScope: kAudioObjectPropertyScopeGlobal,
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mElement: kAudioObjectPropertyElementMain
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)
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var deviceName: CFString = "" as CFString
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let nameStatus = withUnsafeMutablePointer(to: &deviceName) { ptr in
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AudioObjectGetPropertyData(
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defaultOutputDeviceID,
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&nameAddress,
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0,
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nil,
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&nameSize,
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ptr
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)
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}
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if nameStatus == noErr {
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return deviceName as String
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}
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return nil
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}
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public func isLikelyHeadphones(name: String, minorClass: UInt32, majorClass: UInt32 = 0) -> Bool {
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let lower = name.lowercased()
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let nonAudioKeywords = ["mouse", "keyboard", "trackpad", "pen", "pencil", "watch"]
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for nonKw in nonAudioKeywords {
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if lower.contains(nonKw) { return false }
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}
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let keywords = ["buds", "pods", "freebuds", "airpods", "headphone", "headset", "earphone", "earbuds", "wh-", "wf-", "qc", "bose", "sony", "jbl", "beats", "marshall", "sennheiser", "soundcore", "pixel buds", "galaxy buds"]
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for kw in keywords {
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if lower.contains(kw) { return true }
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}
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if majorClass == 4 && (minorClass >= 1 && minorClass <= 6) {
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return true
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}
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return false
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}
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private func extractBatteryLevels(from device: IOBluetoothDevice, fallbackDevice: IOBluetoothDevice? = nil, into model: inout BluetoothDeviceModel, isMulti: Bool) {
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func getBatteryValue(from dev: IOBluetoothDevice, selectorName: String) -> Int? {
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let sel = Selector((selectorName))
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if dev.responds(to: sel) {
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let imp = dev.method(for: sel)
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let fn = unsafeBitCast(imp, to: IntBatteryGetter.self)
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let val = fn(dev, sel)
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if val > 0 && val <= 100 {
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return val
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}
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}
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let selPeer = Selector(("peer"))
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if dev.responds(to: selPeer),
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let peer = dev.perform(selPeer)?.takeUnretainedValue() as? NSObject {
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let pSel = Selector((selectorName))
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if peer.responds(to: pSel) {
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let imp = peer.method(for: pSel)
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let fn = unsafeBitCast(imp, to: IntBatteryGetter.self)
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let val = fn(peer, pSel)
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if val > 0 && val <= 100 {
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return val
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}
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}
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}
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return nil
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}
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func query(selectorName: String) -> Int? {
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return getBatteryValue(from: device, selectorName: selectorName)
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?? (fallbackDevice != nil ? getBatteryValue(from: fallbackDevice!, selectorName: selectorName) : nil)
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}
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let addr = model.address
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if isMulti {
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model.leftBattery = query(selectorName: "batteryPercentLeft")
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model.rightBattery = query(selectorName: "batteryPercentRight")
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model.caseBattery = query(selectorName: "batteryPercentCase")
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model.combinedBattery = query(selectorName: "batteryPercentCombined")
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model.singleBattery = query(selectorName: "batteryPercentSingle") ?? query(selectorName: "headsetBattery")
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} else {
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if let probeBatt = knownBatteries[addr], probeBatt > 0 && probeBatt <= 100 {
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model.singleBattery = probeBatt
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} else {
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let single = query(selectorName: "batteryPercentSingle")
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?? query(selectorName: "headsetBattery")
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?? query(selectorName: "batteryPercentCombined")
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?? query(selectorName: "batteryPercentLeft")
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?? query(selectorName: "batteryPercentRight")
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if let single = single {
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knownBatteries[addr] = single
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model.singleBattery = single
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}
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}
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}
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}
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private func enrichFromIORegistry(devices: inout [BluetoothDeviceModel]) {
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let matching = IOServiceMatching("AppleDeviceManagementHIDEventService")
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var iterator: io_iterator_t = 0
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guard IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iterator) == KERN_SUCCESS else {
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return
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}
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defer { IOObjectRelease(iterator) }
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var entry = IOIteratorNext(iterator)
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while entry != 0 {
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var props: Unmanaged<CFMutableDictionary>?
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if IORegistryEntryCreateCFProperties(entry, &props, kCFAllocatorDefault, 0) == KERN_SUCCESS,
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let dict = props?.takeRetainedValue() as? [String: Any] {
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let prodName = dict["Product"] as? String ?? dict["DeviceName"] as? String
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let addr = dict["DeviceAddress"] as? String
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let batt = dict["BatteryPercent"] as? Int
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let battLeft = dict["BatteryPercentLeft"] as? Int
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let battRight = dict["BatteryPercentRight"] as? Int
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let battCase = dict["BatteryPercentCase"] as? Int
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for i in 0..<devices.count {
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let matchByName = prodName != nil && devices[i].name.caseInsensitiveCompare(prodName!) == .orderedSame
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let matchByAddr = addr != nil && devices[i].address.replacingOccurrences(of: "-", with: ":").caseInsensitiveCompare(addr!.replacingOccurrences(of: "-", with: ":")) == .orderedSame
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if matchByName || matchByAddr {
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if let b = batt, b > 0 && b <= 100 {
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devices[i].singleBattery = b
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knownBatteries[devices[i].address] = b
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}
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if devices[i].isMultiBattery {
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if let bl = battLeft, bl > 0 && bl <= 100 {
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devices[i].leftBattery = bl
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}
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if let br = battRight, br > 0 && br <= 100 {
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devices[i].rightBattery = br
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}
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if let bc = battCase, bc > 0 && bc <= 100 {
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devices[i].caseBattery = bc
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}
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}
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}
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}
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}
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IOObjectRelease(entry)
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entry = IOIteratorNext(iterator)
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}
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}
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}
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