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session-ios/Session/Signal/CallAudioService.swift

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////
//// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
////
//
//import Foundation
//import AVFoundation
//import SignalUtilitiesKit
//import SignalUtilitiesKit
//
//struct AudioSource: Hashable {
//
// let image: UIImage
// let localizedName: String
// let portDescription: AVAudioSessionPortDescription?
//
// // The built-in loud speaker / aka speakerphone
// let isBuiltInSpeaker: Bool
//
// // The built-in quiet speaker, aka the normal phone handset receiver earpiece
// let isBuiltInEarPiece: Bool
//
// init(localizedName: String, image: UIImage, isBuiltInSpeaker: Bool, isBuiltInEarPiece: Bool, portDescription: AVAudioSessionPortDescription? = nil) {
// self.localizedName = localizedName
// self.image = image
// self.isBuiltInSpeaker = isBuiltInSpeaker
// self.isBuiltInEarPiece = isBuiltInEarPiece
// self.portDescription = portDescription
// }
//
// init(portDescription: AVAudioSessionPortDescription) {
//
// let isBuiltInEarPiece = portDescription.portType == AVAudioSession.Port.builtInMic
//
// // portDescription.portName works well for BT linked devices, but if we are using
// // the built in mic, we have "iPhone Microphone" which is a little awkward.
// // In that case, instead we prefer just the model name e.g. "iPhone" or "iPad"
// let localizedName = isBuiltInEarPiece ? UIDevice.current.localizedModel : portDescription.portName
//
// self.init(localizedName: localizedName,
// image: #imageLiteral(resourceName: "button_phone_white"), // TODO
// isBuiltInSpeaker: false,
// isBuiltInEarPiece: isBuiltInEarPiece,
// portDescription: portDescription)
// }
//
// // Speakerphone is handled separately from the other audio routes as it doesn't appear as an "input"
// static var builtInSpeaker: AudioSource {
// return self.init(localizedName: NSLocalizedString("AUDIO_ROUTE_BUILT_IN_SPEAKER", comment: "action sheet button title to enable built in speaker during a call"),
// image: #imageLiteral(resourceName: "button_phone_white"), //TODO
// isBuiltInSpeaker: true,
// isBuiltInEarPiece: false)
// }
//
// // MARK: Hashable
//
// static func ==(lhs: AudioSource, rhs: AudioSource) -> Bool {
// // Simply comparing the `portDescription` vs the `portDescription.uid`
// // caused multiple instances of the built in mic to turn up in a set.
// if lhs.isBuiltInSpeaker && rhs.isBuiltInSpeaker {
// return true
// }
//
// if lhs.isBuiltInSpeaker || rhs.isBuiltInSpeaker {
// return false
// }
//
// guard let lhsPortDescription = lhs.portDescription else {
// owsFailDebug("only the built in speaker should lack a port description")
// return false
// }
//
// guard let rhsPortDescription = rhs.portDescription else {
// owsFailDebug("only the built in speaker should lack a port description")
// return false
// }
//
// return lhsPortDescription.uid == rhsPortDescription.uid
// }
//
// var hashValue: Int {
// guard let portDescription = self.portDescription else {
// assert(self.isBuiltInSpeaker)
// return "Built In Speaker".hashValue
// }
// return portDescription.uid.hash
// }
//}
//
//protocol CallAudioServiceDelegate: class {
// func callAudioService(_ callAudioService: CallAudioService, didUpdateIsSpeakerphoneEnabled isEnabled: Bool)
// func callAudioServiceDidChangeAudioSession(_ callAudioService: CallAudioService)
//}
//
//@objc class CallAudioService: NSObject, CallObserver {
//
// private var vibrateTimer: Timer?
// private let audioPlayer = AVAudioPlayer()
// private let handleRinging: Bool
// weak var delegate: CallAudioServiceDelegate? {
// willSet {
// assert(newValue == nil || delegate == nil)
// }
// }
//
// // MARK: Vibration config
// private let vibrateRepeatDuration = 1.6
//
// // Our ring buzz is a pair of vibrations.
// // `pulseDuration` is the small pause between the two vibrations in the pair.
// private let pulseDuration = 0.2
//
// var audioSession: OWSAudioSession {
// return Environment.shared.audioSession
// }
//
// var avAudioSession: AVAudioSession {
// return AVAudioSession.sharedInstance()
// }
//
// // MARK: - Initializers
//
// init(handleRinging: Bool) {
// self.handleRinging = handleRinging
//
// super.init()
//
// // We cannot assert singleton here, because this class gets rebuilt when the user changes relevant call settings
//
// // Configure audio session so we don't prompt user with Record permission until call is connected.
//
// audioSession.configureRTCAudio()
// NotificationCenter.default.addObserver(forName: AVAudioSession.routeChangeNotification, object: avAudioSession, queue: nil) { _ in
// assert(!Thread.isMainThread)
// self.updateIsSpeakerphoneEnabled()
// }
// }
//
// deinit {
// NotificationCenter.default.removeObserver(self)
// }
//
// // MARK: - CallObserver
//
// internal func stateDidChange(call: SignalCall, state: CallState) {
// AssertIsOnMainThread()
// self.handleState(call: call)
// }
//
// internal func muteDidChange(call: SignalCall, isMuted: Bool) {
// AssertIsOnMainThread()
//
// ensureProperAudioSession(call: call)
// }
//
// internal func holdDidChange(call: SignalCall, isOnHold: Bool) {
// AssertIsOnMainThread()
//
// ensureProperAudioSession(call: call)
// }
//
// internal func audioSourceDidChange(call: SignalCall, audioSource: AudioSource?) {
// AssertIsOnMainThread()
//
// ensureProperAudioSession(call: call)
//
// if let audioSource = audioSource, audioSource.isBuiltInSpeaker {
// self.isSpeakerphoneEnabled = true
// } else {
// self.isSpeakerphoneEnabled = false
// }
// }
//
// internal func hasLocalVideoDidChange(call: SignalCall, hasLocalVideo: Bool) {
// AssertIsOnMainThread()
//
// ensureProperAudioSession(call: call)
// }
//
// // Speakerphone can be manipulated by the in-app callscreen or via the system callscreen (CallKit).
// // Unlike other CallKit CallScreen buttons, enabling doesn't trigger a CXAction, so it's not as simple
// // to track state changes. Instead we never store the state and directly access the ground-truth in the
// // AVAudioSession.
// private(set) var isSpeakerphoneEnabled: Bool = false {
// didSet {
// self.delegate?.callAudioService(self, didUpdateIsSpeakerphoneEnabled: isSpeakerphoneEnabled)
// }
// }
//
// public func requestSpeakerphone(isEnabled: Bool) {
// // This is a little too slow to execute on the main thread and the results are not immediately available after execution
// // anyway, so we dispatch async. If you need to know the new value, you'll need to check isSpeakerphoneEnabled and take
// // advantage of the CallAudioServiceDelegate.callAudioService(_:didUpdateIsSpeakerphoneEnabled:)
// DispatchQueue.global().async {
// do {
// try self.avAudioSession.overrideOutputAudioPort( isEnabled ? .speaker : .none )
// } catch {
// owsFailDebug("failed to set \(#function) = \(isEnabled) with error: \(error)")
// }
// }
// }
//
// private func updateIsSpeakerphoneEnabled() {
// let value = avAudioSession.currentRoute.outputs.contains { (portDescription: AVAudioSessionPortDescription) -> Bool in
// return portDescription.portType == .builtInSpeaker
// }
// DispatchQueue.main.async {
// self.isSpeakerphoneEnabled = value
// }
// }
//
// private func ensureProperAudioSession(call: SignalCall?) {
// AssertIsOnMainThread()
//
// guard let call = call, !call.isTerminated else {
// // Revert to default audio
// setAudioSession(category: .soloAmbient,
// mode: .default)
// return
// }
//
// // Disallow bluetooth while (and only while) the user has explicitly chosen the built in receiver.
// //
// // NOTE: I'm actually not sure why this is required - it seems like we should just be able
// // to setPreferredInput to call.audioSource.portDescription in this case,
// // but in practice I'm seeing the call revert to the bluetooth headset.
// // Presumably something else (in WebRTC?) is touching our shared AudioSession. - mjk
// let options: AVAudioSession.CategoryOptions = call.audioSource?.isBuiltInEarPiece == true ? [] : [.allowBluetooth]
//
// if call.state == .localRinging {
// // SoloAmbient plays through speaker, but respects silent switch
// setAudioSession(category: .soloAmbient,
// mode: .default)
// } else if call.hasLocalVideo {
// // Because ModeVideoChat affects gain, we don't want to apply it until the call is connected.
// // otherwise sounds like ringing will be extra loud for video vs. speakerphone
//
// // Apple Docs say that setting mode to AVAudioSessionModeVideoChat has the
// // side effect of setting options: .allowBluetooth, when I remove the (seemingly unnecessary)
// // option, and inspect AVAudioSession.sharedInstance.categoryOptions == 0. And availableInputs
// // does not include my linked bluetooth device
// setAudioSession(category: .playAndRecord,
// mode: .videoChat,
// options: options)
// } else {
// // Apple Docs say that setting mode to AVAudioSessionModeVoiceChat has the
// // side effect of setting options: .allowBluetooth, when I remove the (seemingly unnecessary)
// // option, and inspect AVAudioSession.sharedInstance.categoryOptions == 0. And availableInputs
// // does not include my linked bluetooth device
// setAudioSession(category: .playAndRecord,
// mode: .voiceChat,
// options: options)
// }
//
// do {
// // It's important to set preferred input *after* ensuring properAudioSession
// // because some sources are only valid for certain category/option combinations.
// let existingPreferredInput = avAudioSession.preferredInput
// if existingPreferredInput != call.audioSource?.portDescription {
// Logger.info("changing preferred input: \(String(describing: existingPreferredInput)) -> \(String(describing: call.audioSource?.portDescription))")
// try avAudioSession.setPreferredInput(call.audioSource?.portDescription)
// }
//
// } catch {
// owsFailDebug("failed setting audio source with error: \(error) isSpeakerPhoneEnabled: \(call.isSpeakerphoneEnabled)")
// }
// }
//
// // MARK: - Service action handlers
//
// public func didUpdateVideoTracks(call: SignalCall?) {
// Logger.verbose("")
//
// self.ensureProperAudioSession(call: call)
// }
//
// public func handleState(call: SignalCall) {
// assert(Thread.isMainThread)
//
// Logger.verbose("new state: \(call.state)")
//
// // Stop playing sounds while switching audio session so we don't
// // get any blips across a temporary unintended route.
// stopPlayingAnySounds()
// self.ensureProperAudioSession(call: call)
//
// switch call.state {
// case .idle: handleIdle(call: call)
// case .dialing: handleDialing(call: call)
// case .answering: handleAnswering(call: call)
// case .remoteRinging: handleRemoteRinging(call: call)
// case .localRinging: handleLocalRinging(call: call)
// case .connected: handleConnected(call: call)
// case .reconnecting: handleReconnecting(call: call)
// case .localFailure: handleLocalFailure(call: call)
// case .localHangup: handleLocalHangup(call: call)
// case .remoteHangup: handleRemoteHangup(call: call)
// case .remoteBusy: handleBusy(call: call)
// }
// }
//
// private func handleIdle(call: SignalCall) {
// Logger.debug("")
// }
//
// private func handleDialing(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// // HACK: Without this async, dialing sound only plays once. I don't really understand why. Does the audioSession
// // need some time to settle? Is somethign else interrupting our session?
// DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.2) {
// self.play(sound: OWSSound.callConnecting)
// }
// }
//
// private func handleAnswering(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
// }
//
// private func handleRemoteRinging(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// self.play(sound: OWSSound.callOutboundRinging)
// }
//
// private func handleLocalRinging(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// startRinging(call: call)
// }
//
// private func handleConnected(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
// }
//
// private func handleReconnecting(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
// }
//
// private func handleLocalFailure(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// play(sound: OWSSound.callFailure)
// handleCallEnded(call: call)
// }
//
// private func handleLocalHangup(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// handleCallEnded(call: call)
// }
//
// private func handleRemoteHangup(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// vibrate()
//
// handleCallEnded(call: call)
// }
//
// private func handleBusy(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// play(sound: OWSSound.callBusy)
//
// // Let the busy sound play for 4 seconds. The full file is longer than necessary
// DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 4.0) {
// self.handleCallEnded(call: call)
// }
// }
//
// private func handleCallEnded(call: SignalCall) {
// AssertIsOnMainThread()
// Logger.debug("")
//
// // Stop solo audio, revert to default.
// isSpeakerphoneEnabled = false
// setAudioSession(category: .soloAmbient)
// }
//
// // MARK: Playing Sounds
//
// var currentPlayer: OWSAudioPlayer?
//
// private func stopPlayingAnySounds() {
// currentPlayer?.stop()
// stopAnyRingingVibration()
// }
//
// private func play(sound: OWSSound) {
// guard let newPlayer = OWSSounds.audioPlayer(for: sound, audioBehavior: .call) else {
// owsFailDebug("unable to build player for sound: \(OWSSounds.displayName(for: sound))")
// return
// }
// Logger.info("playing sound: \(OWSSounds.displayName(for: sound))")
//
// // It's important to stop the current player **before** starting the new player. In the case that
// // we're playing the same sound, since the player is memoized on the sound instance, we'd otherwise
// // stop the sound we just started.
// self.currentPlayer?.stop()
// newPlayer.play()
// self.currentPlayer = newPlayer
// }
//
// // MARK: - Ringing
//
// private func startRinging(call: SignalCall) {
// guard handleRinging else {
// Logger.debug("ignoring \(#function) since CallKit handles it's own ringing state")
// return
// }
//
// vibrateTimer = WeakTimer.scheduledTimer(timeInterval: vibrateRepeatDuration, target: self, userInfo: nil, repeats: true) {[weak self] _ in
// self?.ringVibration()
// }
// vibrateTimer?.fire()
// play(sound: .defaultiOSIncomingRingtone)
// }
//
// private func stopAnyRingingVibration() {
// guard handleRinging else {
// Logger.debug("ignoring \(#function) since CallKit handles it's own ringing state")
// return
// }
// Logger.debug("")
//
// // Stop vibrating
// vibrateTimer?.invalidate()
// vibrateTimer = nil
// }
//
// // public so it can be called by timer via selector
// public func ringVibration() {
// // Since a call notification is more urgent than a message notifaction, we
// // vibrate twice, like a pulse, to differentiate from a normal notification vibration.
// vibrate()
// DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + pulseDuration) {
// self.vibrate()
// }
// }
//
// func vibrate() {
// // TODO implement HapticAdapter for iPhone7 and up
// AudioServicesPlaySystemSound(kSystemSoundID_Vibrate)
// }
//
// // MARK: - AudioSession MGMT
// // TODO move this to CallAudioSession?
//
// // Note this method is sensitive to the current audio session configuration.
// // Specifically if you call it while speakerphone is enabled you won't see
// // any connected bluetooth routes.
// var availableInputs: [AudioSource] {
// guard let availableInputs = avAudioSession.availableInputs else {
// // I'm not sure why this would happen, but it may indicate an error.
// owsFailDebug("No available inputs or inputs not ready")
// return [AudioSource.builtInSpeaker]
// }
//
// Logger.info("availableInputs: \(availableInputs)")
// return [AudioSource.builtInSpeaker] + availableInputs.map { portDescription in
// return AudioSource(portDescription: portDescription)
// }
// }
//
// func currentAudioSource(call: SignalCall) -> AudioSource? {
// if let audioSource = call.audioSource {
// return audioSource
// }
//
// // Before the user has specified an audio source on the call, we rely on the existing
// // system state to determine the current audio source.
// // If a bluetooth is connected, this will be bluetooth, otherwise
// // this will be the receiver.
// guard let portDescription = avAudioSession.currentRoute.inputs.first else {
// return nil
// }
//
// return AudioSource(portDescription: portDescription)
// }
//
// private func setAudioSession(category: AVAudioSession.Category,
// mode: AVAudioSession.Mode? = nil,
// options: AVAudioSession.CategoryOptions = AVAudioSession.CategoryOptions(rawValue: 0)) {
//
// AssertIsOnMainThread()
//
// var audioSessionChanged = false
// do {
// if #available(iOS 10.0, *), let mode = mode {
// let oldCategory = avAudioSession.category
// let oldMode = avAudioSession.mode
// let oldOptions = avAudioSession.categoryOptions
//
// guard oldCategory != category || oldMode != mode || oldOptions != options else {
// return
// }
//
// audioSessionChanged = true
//
// if oldCategory != category {
// Logger.debug("audio session changed category: \(oldCategory) -> \(category) ")
// }
// if oldMode != mode {
// Logger.debug("audio session changed mode: \(oldMode) -> \(mode) ")
// }
// if oldOptions != options {
// Logger.debug("audio session changed options: \(oldOptions) -> \(options) ")
// }
// try avAudioSession.setCategory(category, mode: mode, options: options)
//
// } else {
// let oldCategory = avAudioSession.category
// let oldOptions = avAudioSession.categoryOptions
//
// guard avAudioSession.category != category || avAudioSession.categoryOptions != options else {
// return
// }
//
// audioSessionChanged = true
//
// if oldCategory != category {
// Logger.debug("audio session changed category: \(oldCategory) -> \(category) ")
// }
// if oldOptions != options {
// Logger.debug("audio session changed options: \(oldOptions) -> \(options) ")
// }
// try avAudioSession.ows_setCategory(category, with: options)
// }
// } catch {
// let message = "failed to set category: \(category) mode: \(String(describing: mode)), options: \(options) with error: \(error)"
// owsFailDebug(message)
// }
//
// if audioSessionChanged {
// Logger.info("")
// self.delegate?.callAudioServiceDidChangeAudioSession(self)
// }
// }
//}
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