iOS/MacOS:Refactor metal rendering by extracting common implementation

webrtc/sdk/BUILD.gn

Index: webrtc/sdk/BUILD.gn
diff --git a/webrtc/sdk/BUILD.gn b/webrtc/sdk/BUILD.gn
index d8e745c83f64a935469d800fe0c885bdd1bafdf8..ce5fd801f0ef7671eb0fda9642039b62f41d758a 100644
--- a/webrtc/sdk/BUILD.gn
+++ b/webrtc/sdk/BUILD.gn
@@ -58,6 +58,27 @@ if (is_ios || is_mac) {
       "objc/Framework/Headers/WebRTC/RTCSSLAdapter.h",
       "objc/Framework/Headers/WebRTC/RTCTracing.h",
     ]
+
+    if (is_mac || (is_ios && current_cpu == "arm64")) {
+      sources += [
+        "objc/Framework/Classes/Metal/RTCMTLI420Renderer.h",
+        "objc/Framework/Classes/Metal/RTCMTLI420Renderer.mm",
+        "objc/Framework/Classes/Metal/RTCMTLRenderer+Private.h",
+        "objc/Framework/Classes/Metal/RTCMTLRenderer.h",
+        "objc/Framework/Classes/Metal/RTCMTLRenderer.mm",
+      ]
+      if (is_ios) {
+        sources += [
+          "objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h",
+          "objc/Framework/Classes/Metal/RTCMTLNV12Renderer.mm",
+          "objc/Framework/Classes/Metal/RTCMTLVideoView.m",
+        ]
+      }
+      if (is_mac) {
+        sources += [ "objc/Framework/Classes/Metal/RTCMTLNSVideoView.m" ]
+      }
+    }
+
     if (is_ios) {
       sources += [
         "objc/Framework/Classes/RTCCameraPreviewView.m",
@@ -67,13 +88,6 @@ if (is_ios || is_mac) {
         "objc/Framework/Headers/WebRTC/RTCCameraPreviewView.h",
         "objc/Framework/Headers/WebRTC/UIDevice+RTCDevice.h",
       ]
-      if (current_cpu == "arm64") {
-        sources += [
-          "objc/Framework/Classes/Metal/RTCMTLNV12Renderer.h",
-          "objc/Framework/Classes/Metal/RTCMTLNV12Renderer.mm",
-          "objc/Framework/Classes/Metal/RTCMTLVideoView.m",
-        ]
-      }
 
       libs = [ "AVFoundation.framework" ]
       if (current_cpu == "arm64") {
@@ -216,9 +230,6 @@ if (is_ios || is_mac) {
 
     if (is_mac) {
       sources += [
-        "objc/Framework/Classes/Metal/RTCMTLI420Renderer.h",
-        "objc/Framework/Classes/Metal/RTCMTLI420Renderer.mm",
-        "objc/Framework/Classes/Metal/RTCMTLNSVideoView.m",
         "objc/Framework/Classes/RTCNSGLVideoView.m",
         "objc/Framework/Headers/WebRTC/RTCMTLNSVideoView.h",
         "objc/Framework/Headers/WebRTC/RTCNSGLVideoView.h",