gpt4 book ai didi

ios - Swift iOS 中的实时变调

转载 作者:行者123 更新时间:2023-12-01 16:19:51 27 4
gpt4 key购买 nike

我想实现一个 iOS 应用程序(快速),它可以改变手机麦克风输入的音调,并在用户说话时通过扬声器播放修改后的声音,延迟时间最短(最多几毫秒)。到目前为止,我有以下代码:

import UIKit
import AVFoundation

class ViewController: UIViewController {

var player : AVAudioPlayerNode!
var timePitch : AVAudioUnitTimePitch!
var engine : AVAudioEngine!

override func viewDidLoad() {
super.viewDidLoad()
self.timePitch = AVAudioUnitTimePitch()
self.player = AVAudioPlayerNode()
self.engine = AVAudioEngine()

timePitch.pitch = -500
timePitch.rate = 1.0

engine.inputNode.installTap(onBus: 0, bufferSize: 4410, format: engine.inputNode.outputFormat(forBus: 0), block: {
(buffer: AVAudioPCMBuffer, time: AVAudioTime) in
self.engine.attach(self.player)
self.engine.attach(self.timePitch)
self.engine.connect(self.player, to: self.timePitch, format: buffer.format)
self.engine.connect(self.timePitch, to: self.engine.mainMixerNode, format: buffer.format)
self.player.scheduleBuffer(buffer, at: nil, options: AVAudioPlayerNodeBufferOptions.loops, completionHandler: nil)
self.player.play()
})
engine.prepare()
do {
try engine.start()
} catch _ {
print("Failed to start engine!")
}
}
}

但是,一旦我运行该应用程序,我就会收到以下错误:

2020-07-27 01:06:03.972753+0430 Pitch Shifter[37745:5251379] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x6000031f40e0> F8BB1C28-BAE8-11D6-9C31-00039315CD46
2020-07-27 01:06:04.152148+0430 Pitch Shifter[37745:5251392] *** Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'player started when in a disconnected state'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff23c7127e __exceptionPreprocess + 350
1 libobjc.A.dylib 0x00007fff513fbb20 objc_exception_throw + 48
2 CoreFoundation 0x00007fff23c70ff8 +[NSException raise:format:arguments:] + 88
3 AVFAudio 0x00007fff20a7ff67 _Z19AVAE_RaiseExceptionP8NSStringz + 156
4 AVFAudio 0x00007fff20b13c57 _ZN21AVAudioPlayerNodeImpl9StartImplEP11AVAudioTime + 453
5 AVFAudio 0x00007fff20b116cc -[AVAudioPlayerNode play] + 60
6 Pitch Shifter 0x000000010c06a25d $s13Pitch_Shifter14ViewControllerC11viewDidLoadyyFySo16AVAudioPCMBufferC_So0H4TimeCtcfU_ + 3005
7 Pitch Shifter 0x000000010c06a32f $sSo16AVAudioPCMBufferCSo0A4TimeCIeggg_AbDIeyByy_TR + 95
8 AVFAudio 0x00007fff20aaee1b _ZN14AVAudioNodeTap10TapMessage25RealtimeMessenger_PerformEv + 1325
9 AVFAudio 0x00007fff20b21e4b _ZN17RealtimeMessenger23_PerformPendingMessagesEv + 59
10 AVFAudio 0x00007fff20b21df2 ___ZN17RealtimeMessengerC2EN10applesauce8dispatch2v15queueE_block_invoke + 97
11 libdispatch.dylib 0x000000010c397d48 _dispatch_client_callout + 8
12 libdispatch.dylib 0x000000010c39a6ba _dispatch_continuation_pop + 552
13 libdispatch.dylib 0x000000010c3ada0f _dispatch_source_invoke + 2205
14 libdispatch.dylib 0x000000010c39e40e _dispatch_lane_serial_drain + 307
15 libdispatch.dylib 0x000000010c39f1b5 _dispatch_lane_invoke + 476
16 libdispatch.dylib 0x000000010c3a928c _dispatch_root_queue_drain + 351
17 libdispatch.dylib 0x000000010c3a907f _dispatch_worker_thread + 278
18 libsystem_pthread.dylib 0x00007fff52466109 _pthread_start + 148
19 libsystem_pthread.dylib 0x00007fff52461b8b thread_start + 15
)
libc++abi.dylib: terminating with uncaught exception of type NSException

感谢任何解决此问题的帮助。

编辑:

我认为问题在于 installTap 回调函数从未被调用,因此链被破坏了。

如果我使用 AVFoundation 的时间效果来处理实时麦克风输入的方法是正确的,那么如何解决这个错误?

或者,如果我的方法方向错误,我如何才能以最小延迟(最多几毫秒的延迟)实时更改设备麦克风输入的音高?

最佳答案

我找不到上述问题的正确答案,如果有人能回答我将不胜感激,但现在我找到了 AudioKit这是一个很棒的声音处理库,可以完美地完成这项工作。

This是我项目源代码的链接,如果将来有人需要的话。

import UIKit
import AudioKit
import AudioKitUI

class ViewController: UIViewController {

@IBOutlet weak var slider: UISlider!
@IBOutlet weak var label: UILabel!
@IBOutlet var audioInputPlot: AKNodeOutputPlot!

var micBooster: AKBooster?
var pitchShifter: AKPitchShifter?
var tracker: AKFrequencyTracker!
let mic = AKMicrophone()

override func viewDidLoad() {
super.viewDidLoad()
AKSettings.sampleRate = AudioKit.engine.inputNode.inputFormat(forBus: 0).sampleRate

let micMixer = AKMixer(mic)
tracker = AKFrequencyTracker.init(mic)
micBooster = AKBooster(micMixer)

pitchShifter = AKPitchShifter(micBooster, shift: 0)

micBooster!.gain = 5

AudioKit.output = pitchShifter

do{
try AudioKit.start()
} catch {
print("error occured")
}
}
}

关于ios - Swift iOS 中的实时变调,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63105592/

27 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com