[video_player] Make video player avfoundation seek to async (flutter#3299)

[video_player] Make video player avfoundation seek to async

Author: gabrielgarciagava

packages/video_player/video_player_avfoundation/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.4.2
+
+* Makes seekTo async and only complete when AVPlayer.seekTo completes.
+
 ## 2.4.1
 
 * Clarifies explanation of endorsement in README.

packages/video_player/video_player_avfoundation/example/integration_test/video_player_test.dart

@@ -76,10 +76,7 @@ void main() {
 
       await controller.seekTo(const Duration(seconds: 3));
 
-      // TODO(stuartmorgan): Switch to _controller.position once seekTo is
-      // fixed on the native side to wait for completion, so this is testing
-      // the native code rather than the MiniController position cache.
-      expect(controller.value.position, const Duration(seconds: 3));
+      expect(await controller.position, const Duration(seconds: 3));
     });
 
     testWidgets('can be paused', (WidgetTester tester) async {

packages/video_player/video_player_avfoundation/example/ios/RunnerTests/VideoPlayerTests.m

@@ -12,6 +12,7 @@
 @interface FLTVideoPlayer : NSObject <FlutterStreamHandler>
 @property(readonly, nonatomic) AVPlayer *player;
 @property(readonly, nonatomic) AVPlayerLayer *playerLayer;
+@property(readonly, nonatomic) int64_t position;
 @end
 
 @interface FLTVideoPlayerPlugin (Test) <FLTAVFoundationVideoPlayerApi>
@@ -106,10 +107,30 @@ - (void)testSeekToInvokesTextureFrameAvailableOnTextureRegistry {
   OCMStub([partialRegistrar textures]).andReturn(mockTextureRegistry);
   FLTVideoPlayerPlugin *videoPlayerPlugin =
       (FLTVideoPlayerPlugin *)[[FLTVideoPlayerPlugin alloc] initWithRegistrar:partialRegistrar];
-  FLTPositionMessage *message = [FLTPositionMessage makeWithTextureId:@101 position:@0];
+
   FlutterError *error;
-  [videoPlayerPlugin seekTo:message error:&error];
+  [videoPlayerPlugin initialize:&error];
+  XCTAssertNil(error);
+  FLTCreateMessage *create = [FLTCreateMessage
+      makeWithAsset:nil
+                uri:@"https://flutter.github.io/assets-for-api-docs/assets/videos/hls/bee.m3u8"
+        packageName:nil
+         formatHint:nil
+        httpHeaders:@{}];
+  FLTTextureMessage *textureMessage = [videoPlayerPlugin create:create error:&error];
+  NSNumber *textureId = textureMessage.textureId;
+
+  XCTestExpectation *initializedExpectation = [self expectationWithDescription:@"seekTo completes"];
+  FLTPositionMessage *message = [FLTPositionMessage makeWithTextureId:textureId position:@1234];
+  [videoPlayerPlugin seekTo:message
+                 completion:^(FlutterError *_Nullable error) {
+                   [initializedExpectation fulfill];
+                 }];
+  [self waitForExpectationsWithTimeout:30.0 handler:nil];
   OCMVerify([mockTextureRegistry textureFrameAvailable:message.textureId.intValue]);
+
+  FLTVideoPlayer *player = videoPlayerPlugin.playersByTextureId[textureId];
+  XCTAssertEqual([player position], 1234);
 }
 
 - (void)testDeregistersFromPlayer {

packages/video_player/video_player_avfoundation/ios/Classes/FLTVideoPlayerPlugin.m

@@ -403,13 +403,11 @@ - (int64_t)duration {
   return FLTCMTimeToMillis([[[_player currentItem] asset] duration]);
 }
 
-- (void)seekTo:(int)location {
-  // TODO(stuartmorgan): Update this to use completionHandler: to only return
-  // once the seek operation is complete once the Pigeon API is updated to a
-  // version that handles async calls.
+- (void)seekTo:(int)location completionHandler:(void (^)(BOOL))completionHandler {
   [_player seekToTime:CMTimeMake(location, 1000)
-      toleranceBefore:kCMTimeZero
-       toleranceAfter:kCMTimeZero];
+        toleranceBefore:kCMTimeZero
+         toleranceAfter:kCMTimeZero
+      completionHandler:completionHandler];
 }
 
 - (void)setIsLooping:(BOOL)isLooping {
@@ -636,10 +634,16 @@ - (FLTPositionMessage *)position:(FLTTextureMessage *)input error:(FlutterError
   return result;
 }
 
-- (void)seekTo:(FLTPositionMessage *)input error:(FlutterError **)error {
+- (void)seekTo:(FLTPositionMessage *)input
+    completion:(void (^)(FlutterError *_Nullable))completion {
   FLTVideoPlayer *player = self.playersByTextureId[input.textureId];
-  [player seekTo:input.position.intValue];
-  [self.registry textureFrameAvailable:input.textureId.intValue];
+  [player seekTo:input.position.intValue
+      completionHandler:^(BOOL finished) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+          [self.registry textureFrameAvailable:input.textureId.intValue];
+          completion(nil);
+        });
+      }];
 }
 
 - (void)pause:(FLTTextureMessage *)input error:(FlutterError **)error {

packages/video_player/video_player_avfoundation/ios/Classes/messages.g.h

@@ -1,9 +1,11 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Autogenerated from Pigeon (v2.0.1), do not edit directly.
+// Autogenerated from Pigeon (v8.0.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
+
 #import <Foundation/Foundation.h>
+
 @protocol FlutterBinaryMessenger;
 @protocol FlutterMessageCodec;
 @class FlutterError;
@@ -97,7 +99,7 @@ NSObject<FlutterMessageCodec> *FLTAVFoundationVideoPlayerApiGetCodec(void);
 /// @return `nil` only when `error != nil`.
 - (nullable FLTPositionMessage *)position:(FLTTextureMessage *)msg
                                     error:(FlutterError *_Nullable *_Nonnull)error;
-- (void)seekTo:(FLTPositionMessage *)msg error:(FlutterError *_Nullable *_Nonnull)error;
+- (void)seekTo:(FLTPositionMessage *)msg completion:(void (^)(FlutterError *_Nullable))completion;
 - (void)pause:(FLTTextureMessage *)msg error:(FlutterError *_Nullable *_Nonnull)error;
 - (void)setMixWithOthers:(FLTMixWithOthersMessage *)msg
                    error:(FlutterError *_Nullable *_Nonnull)error;