Fix(ios): fix real time issue when fast zapping (#3582)

* fix(ios): fix real time issue when doing fast zapping

* fix(ios): fix delay implementation (timing was not applied correctly)

* chore: fix random crash in sample

* chore: fix linter

examples/basic/src/VideoPlayer.tsx

@@ -693,6 +693,9 @@ class VideoPlayer extends Component {
                       });
                     }}>
                     {this.state.audioTracks.map(track => {
+                      if (!track) {
+                        return;
+                      }
                       return (
                         <Picker.Item
                           label={track.language}
@@ -720,13 +723,18 @@ class VideoPlayer extends Component {
                       });
                     }}>
                     <Picker.Item label={'none'} value={'none'} key={'none'} />
-                    {this.state.textTracks.map(track => (
+                    {this.state.textTracks.map(track => {
+                      if (!track) {
+                        return;
+                      }
+                      return (
                         <Picker.Item
                           label={track.language}
                           value={track.language}
                           key={track.language}
                         />
-                    ))}
+                      );
+                    })}
                   </Picker>
                 )}
               </View>

ios/Video/Features/RCTVideoUtils.swift

@@ -364,7 +364,7 @@ enum RCTVideoUtils {
 
     static func delay(seconds: Int = 0) -> Promise<Void> {
         return Promise<Void>(on: .global()) { fulfill, _ in
-            DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double(Int64(seconds)) / Double(NSEC_PER_SEC)) {
+            DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(seconds)) {
                 fulfill(())
             }
         }

ios/Video/RCTVideo.swift

@@ -300,14 +300,38 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
         }
     }
 
+    var isSetSourceOngoing = false
+    var nextSource: NSDictionary?
+
+    func applyNextSource() {
+        if self.nextSource != nil {
+            DebugLog("apply next source")
+            self.isSetSourceOngoing = false
+            let nextSrc = self.nextSource
+            self.nextSource = nil
+            self.setSrc(nextSrc)
+        }
+    }
+
     // MARK: - Player and source
 
     @objc
     func setSrc(_ source: NSDictionary!) {
+        if self.isSetSourceOngoing || self.nextSource != nil {
+            DebugLog("setSrc buffer request")
+            self._player?.replaceCurrentItem(with: nil)
+            nextSource = source
+            return
+        }
+        self.isSetSourceOngoing = true
+
         let dispatchClosure = {
             self._source = VideoSource(source)
             if self._source?.uri == nil || self._source?.uri == "" {
                 self._player?.replaceCurrentItem(with: nil)
+                self.isSetSourceOngoing = false
+                self.applyNextSource()
+                DebugLog("setSrc Stopping playback")
                 return
             }
             self.removePlayerLayer()
@@ -321,9 +345,13 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
                     guard let self else { throw NSError(domain: "", code: 0, userInfo: nil) }
                     guard let source = self._source else {
                         DebugLog("The source not exist")
+                        self.isSetSourceOngoing = false
+                        self.applyNextSource()
                         throw NSError(domain: "", code: 0, userInfo: nil)
                     }
                     if let uri = source.uri, uri.starts(with: "ph://") {
+                        self.isSetSourceOngoing = false
+                        self.applyNextSource()
                         return Promise {
                             RCTVideoUtils.preparePHAsset(uri: uri).then { asset in
                                 return self.playerItemPrepareText(asset: asset, assetOptions: nil, uri: source.uri ?? "")
@@ -334,6 +362,8 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
                           let asset = assetResult.asset,
                           let assetOptions = assetResult.assetOptions else {
                         DebugLog("Could not find video URL in source '\(String(describing: self._source))'")
+                        self.isSetSourceOngoing = false
+                        self.applyNextSource()
                         throw NSError(domain: "", code: 0, userInfo: nil)
                     }
 
@@ -361,7 +391,10 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
                     return self.playerItemPrepareText(asset: asset, assetOptions: assetOptions, uri: source.uri ?? "")
                 }.then { [weak self] (playerItem: AVPlayerItem!) in
                     guard let self else { throw NSError(domain: "", code: 0, userInfo: nil) }
-
+                    if !self.isSetSourceOngoing {
+                        DebugLog("setSrc has been canceled last step")
+                        return
+                    }
                     self._player?.pause()
                     self._playerItem = playerItem
                     self._playerObserver.playerItem = self._playerItem
@@ -402,8 +435,16 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
                         "drm": self._drm?.json ?? NSNull(),
                         "target": self.reactTag,
                     ])
-                }.catch { _ in }
+                    self.isSetSourceOngoing = false
+                    self.applyNextSource()
+                }.catch { error in
+                    DebugLog("An error occurred: \(error.localizedDescription)")
+                    self.onVideoError?(["error": error.localizedDescription])
+                    self.isSetSourceOngoing = false
+                    self.applyNextSource()
+                }
             self._videoLoadStarted = true
+            self.applyNextSource()
         }
         DispatchQueue.global(qos: .default).async(execute: dispatchClosure)
     }