Add output latency

RNSound/RNSound.m

@@ -371,6 +371,12 @@ - (NSDictionary *)constantsToExport {
     [session setActive:true error:nil];
 }
 
+RCT_EXPORT_METHOD(getOutputLatency:(RCTResponseSenderBlock)callback) {
+    AVAudioSession *session = [AVAudioSession sharedInstance];
+    double latency = session.outputLatency;
+    callback(@[@(latency)]);
+}
+
 + (BOOL)requiresMainQueueSetup {
     return YES;
 }

index.d.ts

@@ -15,6 +15,8 @@ type BasePathType = string
 
 type CallbackType = (error: any) => void
 
+type LatencyCallback = (latency: number) => void;
+
 declare class Sound {
   static MAIN_BUNDLE: string
   static DOCUMENT: string
@@ -50,6 +52,14 @@ declare class Sound {
    */
   static setMode(mode: AVAudioSessionMode): void
 
+   /**
+   * Gets the current audio output latency
+   * This function is iOS only
+   *
+   * @param callback Function to receive the latency
+   */
+   static getOutputLatency(callback: LatencyCallback): void
+
   /**
    * @param filenameOrFile Either absolute or relative path to the sound file or the `require` call.
    * @param basePathOrCallback Optional base path of the file. Omit this or pass '' if filename is an absolute path; you may use one of the predefined directories: Sound.MAIN_BUNDLE, Sound.DOCUMENT, Sound.LIBRARY, Sound.CACHES. If you are using `require` to define filepath, then set the callback function as the second argument.
@@ -196,7 +206,7 @@ declare class Sound {
   /**
    * Whether the player is playing or not.
    */
-  isPlaying(): boolean
+  isPlaying(): boolean 
 }
 
 export = Sound;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-sound",
-  "version": "0.11.2",
+  "version": "0.11.3",
   "description": "React Native module for playing sound clips on iOS, Android, and Windows",
   "main": "sound.js",
   "typings": "index.d.ts",

sound.js

@@ -325,6 +325,12 @@ Sound.setSpeakerPhone = function(value) {
   }
 }
 
+Sound.getOutputLatency = function(callback) {
+  if (!IsAndroid && !IsWindows) {
+    RNSound.getOutputLatency(callback)
+  }
+}
+
 Sound.MAIN_BUNDLE = RNSound.MainBundlePath;
 Sound.DOCUMENT = RNSound.NSDocumentDirectory;
 Sound.LIBRARY = RNSound.NSLibraryDirectory;