AVAudioPlayer 多个错误 - BAD_ACCESS、无法识别的选择器、数据源读取失败、没有为 id 注册工厂 id
[英]AVAudioPlayer multiple errors - BAD_ACCESS, unrecognized selector, DataSource read failed, No factory id registered for id
问题描述
注意：此代码中某处的不安全 memory 访问似乎存在问题。 测试风险自负！
在尝试使用AVFoundation / AVAudioPlayer向我的应用程序添加音效时，我遇到了多个问题。 其中一些是恒定的； 其他仅在应该快速连续播放声音以响应用户交互时发生。 这可以通过在 MCVE 中点击屏幕中央的方形视图来查看； 低于一定的敲击率，只会出现错误 1 和错误 2，而如果您敲击足够快，您将（另外）交替遇到由错误 3 或 4 导致的崩溃。虽然我怀疑与速度相关的错误可能与此有关生成太多单独的线程和/或这些线程导致同时访问同一个变量（特别是，当在soundEffects字典的元组值中设置布尔值时），我不清楚为什么不同之间的错误是不同的试验。
其中一些错误已在此处或其他地方讨论过，但似乎没有针对其中任何一个的明确可行的解决方案。 我已经在下面的相关点链接了这些讨论，并就它们为什么不能解决我的应用程序的问题提供了评论。 不幸的是，从这个 6 个月大的未回答问题以及对其他问题缺乏共识来看，这似乎不是一个可以直接解决的问题。 我相信这个问题仍然值得提出，以便为这组相关问题带来新的关注，也因为这里的代码示例以某种方式设法一次遇到所有这些问题。 （这不是故意的，只是巧合：，D）如果有人搜索其中一个错误并最终出现在这里。 将有一个方便的链接帖子集合供他们查看，欢迎进行任何编辑（我打算将其设为社区 Wiki，但该选项似乎不适用于问题。只有答案），随意添加在您认为可以改善此问题的任何其他见解/上下文/详细信息中。 或删除任何减损或不相关的内容。
错误 1（在应用程序启动时显示，在soundIsAvailable变为true之前）：它不只是在模拟器上，如本次讨论； 它也发生在真正的 iPhone 12 上。将AVAudioPlayer声明移动到全局 scope 并没有为我解决任何问题。 此处和此处也讨论了慢启动，但是在播放静音文件时（我在viewDidLoad中执行此操作），正如几个答案所建议的那样，确实为设置soundIsAvailable boolean 提供了一个方便的“计时器”，它无法避免~播放第一个声音之前的 15 秒延迟。
2022-09-20 20:46:57.640005-0500 Sound Errors[32793:2252821] DataSource read failed
2022-09-20 20:46:57.706245-0500 Sound Errors[32793:2252828] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x600001169da0> F8BB1C28-BAE8-11D6-9C31-00039315CD46
2022-09-20 20:46:57.808740-0500 Sound Errors[32793:2252899] AudioObjectPropertiesChanged: no such object
错误 2（一段时间后发生，但不依赖于用户交互）：
2022-09-20 20:47:12.805329-0500 Sound Errors[32793:2252828] [aqme] AQMEIO.cpp:199 timed out after 15.000s (0 0); suspension count=0 (IOSuspensions: )
2022-09-20 20:47:12.805850-0500 Sound Errors[32793:2252828] AudioDeviceStop: no device with given ID
2022-09-20 20:47:12.806364-0500 Sound Errors[32793:2252828] AudioDeviceStop: no device with given ID
2022-09-20 20:47:12.807407-0500 Sound Errors[32793:2252828] [aqme] MEDeviceStreamClient.cpp:431 AQME Default-InputOutput: client stopping after failed start: <CA_UISoundClientBase@0x153904f00>; running count now 0
2022-09-20 20:47:12.808272-0500 Sound Errors[32793:2252828] CA_UISoundClient.cpp:285 CA_UISoundClientBase::StartPlaying: AddRunningClient failed (status = -66681).
错误 3：Bad Access（线程号在各个试验中不一致，除了 (11db) 之外没有任何内容打印到控制台）
Thread 6: EXC_BAD_ACCESS (code=1, address=0x10)
错误 4：无法识别的选择器（它并不总是__NSTaggedDate ，但它似乎始终是0x8000000000000000 ）
2022-09-20 21:57:33.690905-0500 Sound Errors[33833:2316174] -[__NSTaggedDate count]: unrecognized selector sent to instance 0x8000000000000000
2022-09-20 21:57:33.698566-0500 Sound Errors[33833:2316174] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSTaggedDate count]: unrecognized selector sent to instance 0x8000000000000000'
*** First throw call stack:
(
0 CoreFoundation 0x000000018040c304 __exceptionPreprocess + 172
1 libobjc.A.dylib 0x000000018005131c objc_exception_throw + 56
2 CoreFoundation 0x000000018041afbc +[NSObject(NSObject) instanceMethodSignatureForSelector:] + 0
3 CoreFoundation 0x0000000180410204 ___forwarding___ + 1308
4 CoreFoundation 0x000000018041268c _CF_forwarding_prep_0 + 92
5 libswiftCore.dylib 0x000000018bcb611c $sSD8_VariantVyq_SgxciM + 164
6 libswiftCore.dylib 0x000000018bcb6000 $sSDyq_SgxciM + 132
7 Sound Errors 0x00000001008a7094 $s12Sound_Errors14ErrorGeneratorV10playEffect5namedySS_tFZyycfU_ + 132
8 Sound Errors 0x00000001008a7148 $sIeg_IeyB_TR + 48
9 libdispatch.dylib 0x0000000100ef5d5c _dispatch_client_callout + 16
10 libdispatch.dylib 0x0000000100ef9210 _dispatch_continuation_pop + 756
11 libdispatch.dylib 0x0000000100f108c4 _dispatch_source_invoke + 1684
12 libdispatch.dylib 0x0000000100f0a8ac _dispatch_root_queue_drain + 440
13 libdispatch.dylib 0x0000000100f0b53c _dispatch_worker_thread2 + 248
14 libsystem_pthread.dylib 0x00000001ae55eb04 _pthread_wqthread + 224
15 libsystem_pthread.dylib 0x00000001ae55d904 start_wqthread + 8
)
libc++abi: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSTaggedDate count]: unrecognized selector sent to instance 0x8000000000000000'
terminating with uncaught exception of type NSException
CoreSimulator 857.7 - Device: iPhone 12 (D510B935-5295-43DC-AC72-E779D87B1D64) - Runtime: iOS 16.0 (20A360) - DeviceType: iPhone 12
(lldb)
错误 5（这似乎只是日志噪音，因为即使声音播放正确也会打印出来）：
2022-09-20 20:48:54.755785-0500 Sound Errors[32793:2252630] DataSource read failed
附加细节：声音文件都使用 .m4a 格式，长度都在 1 到 2 秒之间。 我知道问题不在于应用程序找不到文件，因为它们确实在 AVAudioPlayer 加载和崩溃发生之间的时间内正确播放。 所有相关代码（声音文件除外）都包含在此处； rest 只是一个默认的应用程序模板 Xcode 项目。 我安装了 BlackHole 音频驱动程序（这是我用来录制声音的），但不相信这是造成任何这些错误的原因。
视图控制器文件
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var tappableView: UIView!
let colors = [UIColor.systemGreen, UIColor.systemPink]
var colorIndex = true
override func viewDidLoad() {
super.viewDidLoad()
ErrorGenerator.setUpSound()
}
@IBAction func viewTapped(_ sender: UITapGestureRecognizer) {
// Shows that the square view has recognized a tap by toggling its color
colorIndex.toggle()
tappableView.backgroundColor = colors[Int(truncating: NSNumber(value: colorIndex))]
// Call the sound generating function from the ErrorGenerator struct
ErrorGenerator.playTapSounds()
}
}
错误源文件
import Foundation
import AVFoundation
struct ErrorGenerator {
// The first time AVAudioPlayer is used, it takes FOREVER (> 15 seconds) to start. This initializer is here so that we don't attempt to call the playEffect function until this delay is over and soundIsReady has been set to true.
static var AVInitializer = AVAudioPlayer()
static var soundIsReady = false
// Tuple items are: AVAudioPlayer, whether it is currently playing a sound effect, and the duration of the sound effect (in seconds)
static var audioPlayers: [String: (AVAudioPlayer?, Bool, Double)] = ["Sound 1": (nil, true, 1.39), "Sound 2": (nil, true, 1.1), "Sound 3": (nil, true, 1.28), "Sound 4": (nil, true, 1.06)]
static func playEffect(named fileName: String) {
if soundIsReady && audioPlayers[fileName]!.1 {
let url = Bundle.main.url(forResource: fileName, withExtension: "m4a")
do {
audioPlayers[fileName]?.0 = try AVAudioPlayer(contentsOf: url!)
audioPlayers[fileName]?.0?.play()
// Don't let the same sound effect be restarted until it has finished playing. Otherwise, it will cut itself off with a static sound.
audioPlayers[fileName]?.1 = false
DispatchQueue.global(qos: .utility).asyncAfter(deadline: .now() + (audioPlayers[fileName]?.2 ?? 1.39)) {
audioPlayers[fileName]?.1 = true
}
}
catch {
print("Error playing sound effect file: \(error)")
}
} else {
print("Sound is not yet ready")
}
}
static func setUpSound() {
DispatchQueue.global(qos: .utility).async {
let url = Bundle.main.url(forResource: "Empty", withExtension: "m4a")
AVInitializer = try! AVAudioPlayer(contentsOf: url!)
AVInitializer.play()
soundIsReady = true
}
}
static func playTapSounds() {
let s = "Sound \(Int.random(in: 1...4))"
print("Sound selected: \(s)")
playEffect(named: s)
}
}
图片：除了上面的文本错误消息之外，我还包括了这些，因为它们突出显示了出现问题的特定行，并且因为 Xcode 侧边栏具有比控制台中显示的更多关于线程结构的信息。
错误 3 - 访问错误
错误 3 - 错误访问（线程数较高）
错误 4 - 无法识别的选择器
1 个解决方案
解决方案1
0
更新——修复了慢启动、无工厂注册和超时错误
在对问题中的代码进行了一些进一步的实验后，我想出了一个解决其中 3 个问题的方法。 将AVAudioPlayer初始化移动到AppDelegate didFinishLaunchingWithOptions似乎已经解决了加载缓慢的错误。 （我仍然将初始化封装在对实用程序队列的调用中，以避免任何延迟导致应用程序无法启动。）
为了允许同时播放相同音效的多个实例，我将每个音效关联了 3 个AVAudioPlayer实例。
现在，当单击方块时，声音播放流畅，快或慢，等待时间最短（现在唯一的延迟是当所有 3 个给定效果的“插槽”都被占用时，这是代码按预期工作）。 但是，最严重的问题仍然存在： EXC_BAD_ACCESS 。
在这两个试验中，这发生在同一行：在 playEffect 内部对全局实用程序队列的调用中将playEffect重置为true 。 此外，此时播放了随机的“嘈杂”噪音，这不是我的任何音效文件，这让我相信物理 memory 确实存在问题（哎呀？）。 当我使用模拟器上运行的应用程序捕获屏幕截图时，音频也出现了故障。 由于截图音效与我的应用程序无关，这就是为什么我认为这是物理 memory 问题而不是虚拟问题。
这是更新的代码示例：
AppDelegate didFinishLaunchingWithOptions：
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Send this to the utility queue, to avoid stalling the app launch if it takes a long time
DispatchQueue.global(qos: .utility).async {
do {
let emptySoundFileURL = Bundle.main.url(forResource: "Empty", withExtension: "m4a")
ErrorGenerator.AVInitializer = try AVAudioPlayer(contentsOf: emptySoundFileURL!)
ErrorGenerator.AVInitializer?.play()
ErrorGenerator.soundIsReady = true
print("SOUND IS READY!")
}
catch {
print("Error initializing AVAudioPlayer: \(error)")
}
}
return true
}
错误生成器：
import Foundation
import AVFoundation
struct ErrorGenerator {
// Will be set inside AppDelegate, as soon as the app launches
static var AVInitializer: AVAudioPlayer?
static var soundIsReady = false
// EACH SOUND EFFECT HAS 3 ASSOCIATED AVAUDIOPLAYER INSTANCES, TO ALLOW IT TO BE PLAYED SIMULTANEOUSLY UP TO 3 TIMES.
// Dictionary keys are the sound effect names.
// Values are tuples containing 0. as length of the sound effect in seconds, and 1. as an array of 3 inner tuples.
// Inner tuples have 0. as an AVAudioPlayer instance, and 1. as a boolean representing whether the instance has finished playing/is ready to play its corresponding sound effect
static var audioPlayers: [String: (Double, [(AVAudioPlayer?, Bool)])] = [
"Sound 1": (1.39, [(nil, true), (nil, true), (nil, true)]),
"Sound 2": (1.1, [(nil, true), (nil, true), (nil, true)]),
"Sound 3": (1.28, [(nil, true), (nil, true), (nil, true)]),
"Sound 4": (1.06, [(nil, true), (nil, true), (nil, true)])
]
// The sound effect name will be provided by the random number generator when this function is called inside playTapSounds
static func playEffect(named fileName: String) {
if soundIsReady {
let playerIndex = soundEffectIsAvailableAtIndex(named: fileName)
// Don't attempt to play the sound effect unless there is an available AVAudioPlayer for it.
// This caps the number of simultaneous threads that can be generated by this function at 12.
if playerIndex != -1 {
do {
let soundFileURL = Bundle.main.url(forResource: fileName, withExtension: "m4a")
audioPlayers[fileName]?.1[playerIndex].0 = try AVAudioPlayer(contentsOf: soundFileURL!)
// Shows that this audio player is busy - do not attempt to reuse it until it has finished playing the sound effect
audioPlayers[fileName]?.1[playerIndex].1 = false
audioPlayers[fileName]?.1[playerIndex].0?.play()
print("Playing sound effect \(fileName) on audio player #\(playerIndex)")
// Reset the audio player's availability status after the sound has finished playing. The default value is the length of the longest sound effect (in seconds).
DispatchQueue.global(qos: .utility).asyncAfter(deadline: .now() + (audioPlayers[fileName]?.0 ?? 1.39)) {
audioPlayers[fileName]?.1[playerIndex].1 = true
print("Reset audio player #\(playerIndex) for sound effect \(fileName) status to Available")
}
}
catch {
print("Error playing sound effect \(fileName): \(error)")
}
}
} else {
print("Sound effect capability has not yet been initialized by AppDelegate")
}
}
// Returns the first index (possibilities are 0, 1 or 2) of an available (i.e. associated boolean value is true) sound effect in the audioPlayers dict. Returns -1 if none are available.
static func soundEffectIsAvailableAtIndex(named fileName: String) -> Int {
var index = -1
if let dictValue = audioPlayers[fileName] {
for i in 0..<dictValue.1.count {
if dictValue.1[i].1 {
index = i
break
}
}
}
return index
}
static func playTapSounds() {
let s = "Sound \(Int.random(in: 1...4))"
playEffect(named: s)
}
}
视图控制器：
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var tappableView: UIView!
let colors = [UIColor.systemGreen, UIColor.systemPink]
var colorIndex = true
override func viewDidLoad() {
super.viewDidLoad()
}
@IBAction func viewTapped(_ sender: UITapGestureRecognizer) {
// Shows that the square view has recognized a tap by toggling its color
colorIndex.toggle()
tappableView.backgroundColor = colors[Int(truncating: NSNumber(value: colorIndex))]
// Call the sound generating function from the ErrorGenerator struct
ErrorGenerator.playTapSounds()
}
}
以及显示哪一行导致错误访问错误的屏幕截图：
在 iOS13 中重新分配 AVAudioPlayer 实例导致 BAD_ACCESS 运行时错误
[英]Re-Assigning instance of AVAudioPlayer in iOS13 leads to BAD_ACCESS runtime error
插件 AddInstanceForFactory：没有为 id 问题注册工厂
[英]Plugin AddInstanceForFactory: No factory registered for id issue
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