Fix switching camera

rostopira · rostopira · commit 2111a3fee078 · 2018-12-03T14:44:25.000+03:00
diff --git a/ios/Classes/FlutterRTCMediaStream.h b/ios/Classes/FlutterRTCMediaStream.h
@@ -7,6 +7,8 @@
              result:(FlutterResult)result;
 
 -(void)getSources:(FlutterResult)result;
+
+-(void)mediaStreamTrackSwitchCamera:(RTCMediaStreamTrack *)track;
 @end
 
 
diff --git a/ios/Classes/FlutterRTCMediaStream.m b/ios/Classes/FlutterRTCMediaStream.m
@@ -233,8 +233,10 @@ - (void)getUserVideo:(NSDictionary *)constraints
             if (facingMode && [facingMode isKindOfClass:[NSString class]]) {
                 AVCaptureDevicePosition position;
                 if ([facingMode isEqualToString:@"environment"]) {
+                    self._usingFrontCamera = NO;
                     position = AVCaptureDevicePositionBack;
                 } else if ([facingMode isEqualToString:@"user"]) {
+                    self._usingFrontCamera = YES;
                     position = AVCaptureDevicePositionFront;
                 } else {
                     // If the specified facingMode value is not supported, fall back to
@@ -433,9 +435,26 @@ -(void)mediaStreamTrackSetEnabled:(RTCMediaStreamTrack *)track : (BOOL)enabled
 
 -(void)mediaStreamTrackSwitchCamera:(RTCMediaStreamTrack *)track
 {
-  if (track) {
-    //TODO(rostopira): I will handle it, if will work at least
+  if (!self.videoCapturer) {
+    NSLog(@"Video capturer is null. Can't switch camera");
+    return;
+  }
+  self._usingFrontCamera = !self._usingFrontCamera;
+  AVCaptureDevicePosition position = self._usingFrontCamera ? AVCaptureDevicePositionFront : AVCaptureDevicePositionBack;
+  AVCaptureDevice *videoDevice;
+  if (AVCaptureDevicePositionUnspecified != position) {
+    for (AVCaptureDevice *aVideoDevice in [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
+      if (aVideoDevice.position == position) {
+        videoDevice = aVideoDevice;
+        break;
+      }
+    }
+  }
+  if (!videoDevice) {
+    videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
   }
+  AVCaptureDeviceFormat *selectedFormat = [RTCCameraVideoCapturer supportedFormatsForDevice:videoDevice].firstObject;
+  [self.videoCapturer startCaptureWithDevice:videoDevice format:selectedFormat fps:30];
 }
 
 -(void)mediaStreamTrackStop:(RTCMediaStreamTrack *)track
diff --git a/ios/Classes/FlutterWebRTCPlugin.h b/ios/Classes/FlutterWebRTCPlugin.h
@@ -20,6 +20,7 @@
 @property (nonatomic, retain) UIViewController *viewController;/*for broadcast or ReplayKit */
 @property (nonatomic, strong) NSObject<FlutterBinaryMessenger>* messenger;
 @property (nonatomic, strong) RTCCameraVideoCapturer *videoCapturer;
+@property (nonatomic) BOOL _usingFrontCamera;
 
 - (RTCMediaStream*)streamForId:(NSString*)streamId;
 
diff --git a/ios/Classes/FlutterWebRTCPlugin.m b/ios/Classes/FlutterWebRTCPlugin.m
@@ -340,7 +340,7 @@ - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult) result
         RTCMediaStreamTrack *track = self.localTracks[trackId];
         if (track != nil && [track isKindOfClass:[RTCVideoTrack class]]) {
             RTCVideoTrack *videoTrack = (RTCVideoTrack *)track;
-            //TODO(rostopira)
+            [self mediaStreamTrackSwitchCamera:videoTrack];
         } else {
             if (track == nil) {
                 NSLog(@"Track is nil");
