Implement Metal rendering

submodules/TelegramCallsUI/Sources/VideoRenderingContext.swift

@@ -0,0 +1,61 @@
+import Foundation
+import UIKit
+import AsyncDisplayKit
+import Display
+import SwiftSignalKit
+import AccountContext
+import TelegramVoip
+import AVFoundation
+
+protocol VideoRenderingView: UIView {
+    func setOnFirstFrameReceived(_ f: @escaping (Float) -> Void)
+    func setOnOrientationUpdated(_ f: @escaping (PresentationCallVideoView.Orientation, CGFloat) -> Void)
+    func getOrientation() -> PresentationCallVideoView.Orientation
+    func getAspect() -> CGFloat
+    func setOnIsMirroredUpdated(_ f: @escaping (Bool) -> Void)
+    func updateIsEnabled(_ isEnabled: Bool)
+}
+
+class VideoRenderingContext {
+    private var metalContextImpl: Any?
+
+    @available(iOS 13.0, *)
+    var metalContext: MetalVideoRenderingContext {
+        if let value = self.metalContextImpl as? MetalVideoRenderingContext {
+            return value
+        } else {
+            let value = MetalVideoRenderingContext()!
+            self.metalContextImpl = value
+            return value
+        }
+    }
+
+    func makeView(input: Signal<OngoingGroupCallContext.VideoFrameData, NoError>, blur: Bool) -> VideoRenderingView? {
+        if #available(iOS 13.0, *) {
+            return MetalVideoRenderingView(renderingContext: self.metalContext, input: input, blur: blur)
+        } else {
+            return SampleBufferVideoRenderingView(input: input)
+        }
+    }
+
+    func updateVisibility(isVisible: Bool) {
+        if #available(iOS 13.0, *) {
+            self.metalContext.updateVisibility(isVisible: isVisible)
+        }
+    }
+}
+
+extension PresentationCallVideoView.Orientation {
+    init(_ orientation: OngoingCallVideoOrientation) {
+        switch orientation {
+        case .rotation0:
+            self = .rotation0
+        case .rotation90:
+            self = .rotation90
+        case .rotation180:
+            self = .rotation180
+        case .rotation270:
+            self = .rotation270
+        }
+    }
+}