我正在创建一个设备充当服务器并且其他设备加入的应用程序，我设法创建服务器，但我找不到流式传输音频的方法（设备本地歌曲）。
脚步：
我用 GCDWebServer 创建服务器
从 MPMediaItem 获取 NSData
在服务器默认获取请求中设置 songData
这是我的代码：
class DjSocketServer : NSObject,GCDWebServerDelegate
{
var myLocalServer = GCDWebServer()
var isRunning = false
var serverType = ServerType.isDj
func startServer(with type:ServerType)
{
serverType = type
GCDWebServer.setLogLevel(4)
myLocalServer = GCDWebServer()
myLocalServer?.delegate = self
myLocalServer?.addDefaultHandler(forMethod: "GET", request: GCDWebServerRequest.self, processBlock: {request in
//Default Response to GET request
if let requestUrl = request?.url.absoluteString
{
if requestUrl.contains(".mp3")
{
return GCDWebServerDataResponse(data: playerInfo.songPlayedData as Data!, contentType: "audio/mp3")
}
}
let para:NSMutableDictionary = NSMutableDictionary()
para.setValue(DjInformation.party_name, forKey: "djName")
para.setValue(Common.DJ_Connected_Users.count, forKey: "listener")
para.setValue(DjInformation.dj_ip, forKey: "djIp")
para.setValue("http://\(DjInformation.dj_ip):\(AppConfig.Dj_Port)/atrist_poster", forKey: "djImg")
para.setValue(DjInformation.artist_name, forKey: "artist")
let jsonData = try! JSONSerialization.data(withJSONObject: para, options: JSONSerialization.WritingOptions.prettyPrinted)
return GCDWebServerDataResponse(data: jsonData, contentType: "application/json")
})
//myLocalServer?.start(withPort: UInt(ServerPort.DjPort.rawValue), bonjourName: UIDevice.current.name)
do
{
try myLocalServer?.start(options: [GCDWebServerOption_AutomaticallySuspendInBackground:false,GCDWebServerOption_Port:UInt(ServerPort.DjPort.rawValue),GCDWebServerOption_BonjourName:UIDevice.current.name])
print("\n\n\n\n\n\nSuccess Tag:Started ----- \n\n\n\n\n\n")
}catch
{
print("Error Tag : Starting MainDj Server")
}
}
func webServerDidStart(_ server: GCDWebServer!) {
print("Visit \(server.serverURL) in your web browser")
isRunning = true
}
func webServerDidCompleteBonjourRegistration(_ server: GCDWebServer!) {
print(" CompleteBonjourRegistration ")
}
func webServerDidStop(_ server: GCDWebServer!) {
print("\n\n\n\n\n\n\nServer Stoped MainDj\n\n\n\n\n\n\n")
isRunning = false
}
}
我将 MPMediaItem 传递给此函数并转换为 NSData
class func getSongRawData(item: MPMediaItem,success: @escaping (NSData) -> Void,fail: @escaping (NSError) -> Void) -> Void {
if let exporter = createSongExporter(item: item) {
exporter.exportAsynchronously(completionHandler: { () -> Void in
switch exporter.status {
case .completed:
let rawData = NSData(contentsOf: exporter.outputURL!)!
songUrl_selected = (exporter.outputURL?.absoluteString)!
//print("UURL : ",exporter.outputURL?.absoluteString ?? "None")
success(rawData)
default:
let e = NSError(
domain: "jp.co.faithcreates.Meowziq",
code: MusicManagerError.RawDataAccessFailed.rawValue,
userInfo: [
"exporterStatus": exporter.status.rawValue
])
fail(e)
}
self.removeExportedFile(url: exporter.outputURL! as NSURL)
})
} else {
let e = NSError(
domain: "jp.co.faithcreates.Meowziq",
code: MusicManagerError.RawDataAccessFailed.rawValue,
userInfo: nil
)
fail(e)
}
}
private class func createSongExporter(item: MPMediaItem) -> AVAssetExportSession? {
if let url = item.assetURL {
let asset = AVURLAsset(url: url, options: nil)
let exporter = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetAppleM4A)
exporter?.outputFileType = "com.apple.m4a-audio";
let docDir = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let fileName = createExportFileName()
exporter?.outputURL = NSURL(fileURLWithPath: docDir).appendingPathComponent(fileName)
return exporter
} else {
return nil
}
}
private class func createExportFileName() -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyyMMddhhmmss"
let dateString = dateFormatter.string(from: NSDate() as Date)
return String(format: "%@.m4a", dateString)
//return String(format: "%@.m4a", "tmp")
}