feat(ios): improved frame rendering

ref: GetStream/webrtc#70

Author: santhoshvai

ios/RCTWebRTC/RTCVideoViewManager.m

@@ -8,7 +8,7 @@
 #if TARGET_OS_OSX
 #import <WebRTC/RTCMTLNSVideoView.h>
 #else
-#import <WebRTC/RTCMTLVideoView.h>
+#import <WebRTC/RTCVideoRenderingView.h>
 #endif
 #import <WebRTC/RTCCVPixelBuffer.h>
 #import <WebRTC/RTCVideoFrame.h>
@@ -67,7 +67,7 @@ @interface RTCVideoView : RCTView
 #if TARGET_OS_OSX
 @property(nonatomic, readonly) RTCMTLNSVideoView *videoView;
 #else
-@property(nonatomic, readonly) RTCMTLVideoView *videoView;
+@property(nonatomic, readonly) RTCVideoRenderingView *videoView;
 #endif
 
 /**
@@ -124,7 +124,8 @@ - (instancetype)initWithFrame:(CGRect)frame {
         subview.wantsLayer = true;
         _videoView = subview;
 #else
-        RTCMTLVideoView *subview = [[RTCMTLVideoView alloc] initWithFrame:CGRectZero];
+        RTCVideoRenderingView *subview = [[RTCVideoRenderingView alloc] initWithFrame:CGRectZero];
+        subview.renderingBackend = RTCVideoRenderingBackendSharedMetal;
         _videoView = subview;
 #endif
         [self addSubview:self.videoView];

ios/RCTWebRTC/WebRTCModule.m

@@ -111,6 +111,8 @@ - (instancetype)init {
                                                           audioProcessingModule:nil];
         }
 
+        _peerConnectionFactory.frameBufferPolicy = RTCFrameBufferPolicyConvertWithPoolToNV12;
+
         _rtcAudioDeviceModuleObserver = [[AudioDeviceModuleObserver alloc] initWithWebRTCModule:self];
         _audioDeviceModule = [[AudioDeviceModule alloc] initWithSource:_peerConnectionFactory.audioDeviceModule
                                                       delegateObserver:_rtcAudioDeviceModuleObserver];

stream-react-native-webrtc.podspec

@@ -21,7 +21,7 @@ Pod::Spec.new do |s|
   s.swift_version       = '5.0'
   s.dependency          'React-Core'
   # WebRTC version from https://github.com/GetStream/stream-video-swift-webrtc releases
-  s.dependency          'StreamWebRTC', '~>137.0.54'
+  s.dependency          'StreamWebRTC', '~>137.0.62'
   # Swift/Objective-C compatibility #https://blog.cocoapods.org/CocoaPods-1.5.0/
   s.pod_target_xcconfig = {
     'DEFINES_MODULE' => 'YES'