我需要确定录制音频的分贝级别。我想找出录音的不同响度级别。 我已将isMeteringEnabled设置为true，称为updateMeters，也将其称为peakPower和averagePower方法以获取分贝级别。这是正确的方法吗？我录制了具有不同响度的不同文件，但该值一直保持在-120左右。我在这里做什么错了？
我还想知道我设置录音机和播放音频文件的逻辑是否正确？
有什么方法可以将.wav文件而不是二进制文件发送到服务器？
这是我的代码。我希望你能帮助我。我仍然是新手。
非常感谢。
import WatchKit
import Foundation
import AVFoundation
class InterfaceController: WKInterfaceController, AVAudioRecorderDelegate{
@IBOutlet weak var btn: WKInterfaceButton!
var recordingSession : AVAudioSession!
var audioRecorder : AVAudioRecorder!
var settings = [String : Any]()
var player: AVAudioPlayer?
var filename: String?
override func awake(withContext context: Any?) {
super.awake(withContext: context)
recordingSession = AVAudioSession.sharedInstance()
do{
try recordingSession.setCategory(AVAudioSession.Category.playAndRecord)
try recordingSession.setActive(true)
recordingSession.requestRecordPermission(){[unowned self] allowed in
DispatchQueue.main.async {
if allowed{
print("Allow")
} else{
print("Don't Allow")
}
}
}
}
catch{
print("failed to record!")
}
// Audio Settings
settings = [
AVFormatIDKey:Int(kAudioFormatLinearPCM),
AVSampleRateKey:44100.0,
AVNumberOfChannelsKey:1,
AVLinearPCMBitDepthKey:8,
AVLinearPCMIsFloatKey:false,
AVLinearPCMIsBigEndianKey:false,
AVEncoderAudioQualityKey:AVAudioQuality.max.rawValue
]
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
}
override func didDeactivate() {
// This method is called when watch view controller is no longer visible
super.didDeactivate()
}
func getDocumentsDirectory() -> URL
{
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
let documentsDirectory = paths[0]
return documentsDirectory
}
func getFileUrl() -> URL
{
let filePath = getDocumentsDirectory().appendingPathComponent(filename!)
print("Marker1: \(filePath)")
return filePath
}
func startRecording(){
var peakPower:Float = 0.0
var averagePower:Float = 0.0
let audioSession = AVAudioSession.sharedInstance()
do{
audioRecorder = try AVAudioRecorder(url: getFileUrl(),
settings: settings)
audioRecorder.delegate = self
//audioRecorder.prepareToRecord()
}
catch {
finishRecording(success: false)
}
do {
try audioSession.setActive(true)
audioRecorder.record()
audioRecorder.record(forDuration: 5.0)
// retrieving db level
audioRecorder.isMeteringEnabled = true
audioRecorder.updateMeters()
peakPower = audioRecorder.peakPower(forChannel: 0)
averagePower = audioRecorder.averagePower(forChannel: 0)
print("PeakPower: \(peakPower): AveragePower: \(averagePower)")
} catch {
}
}
func finishRecording(success: Bool) {
audioRecorder.stop()
audioRecorder = nil
if success {
print(success)
} else {
//audioRecorder = nil
print("Somthing Wrong.")
}
}
@IBAction func recordAudio() {
if audioRecorder == nil {
print("Pressed")
self.btn.setTitle("Stop")
self.btn.setBackgroundColor(UIColor(red: 119.0/255.0, green: 119.0/255.0, blue: 119.0/255.0, alpha: 1.0))
filename = NSUUID().uuidString+".wav"
self.startRecording()
} else {
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let url = URL(fileURLWithPath: path)
print("Filename\(filename!)")
let pathPart = url.appendingPathComponent(filename!)
let filePath = pathPart.path
let request = NSMutableURLRequest(url: NSURL(string: "http://147.46.242.219/addsound.php")! as URL)
request.httpMethod = "POST"
let audioData = NSData(contentsOfFile: filePath)
print("Result is\(getFileUrl().path)")
print("Binary data printing")
print(audioData)
let postString = "a=\(audioData)"
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request as URLRequest){
data, response, error in
if error != nil {
print("error=\(error)")
return
}
print("response = \(response)")
let responseString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
print("responseString = \(responseString)")
}
task.resume()
self.btn.setTitle("Record")
print("Pressed2")
self.btn.setBackgroundColor(UIColor(red: 221.0/255.0, green: 27.0/255.0, blue: 50.0/255.0, alpha: 1.0))
self.finishRecording(success: true)
}
}
func audioRecorderDidFinishRecording(_ recorder: AVAudioRecorder, successfully flag: Bool) {
if !flag {
finishRecording(success: false)
}
}
func displayUrls(){
guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
do {
let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsDirectory, includingPropertiesForKeys: nil, options: [])
// Print the urls of the files contained in the documents directory
print(directoryContents)
} catch {
print("Could not search for urls of files in documents directory: \(error)")
}
}
func update() {
if let audioRecorder = audioRecorder{
audioRecorder.updateMeters()
}
}
@IBAction func startPlayAudio() {
displayUrls()
let fileManager = FileManager.default
if fileManager.fileExists(atPath: getFileUrl().path){
print("File exists!")
do {
player = try AVAudioPlayer(contentsOf: getFileUrl())
player?.play()
} catch {
print("File cannot be played!")
}
}else{
print("File does not exist!")
}
}
}