feat: KSPlayer as an option for iOS + other improvements (#1266)

modules/mpv-player/ios/SampleBufferDisplayView.swift

@@ -0,0 +1,72 @@
+import UIKit
+import AVFoundation
+
+final class SampleBufferDisplayView: UIView {
+    override class var layerClass: AnyClass { AVSampleBufferDisplayLayer.self }
+    
+    var displayLayer: AVSampleBufferDisplayLayer {
+        return layer as! AVSampleBufferDisplayLayer
+    }
+    
+    private(set) var pipController: PiPController?
+    
+    weak var pipDelegate: PiPControllerDelegate? {
+        didSet {
+            pipController?.delegate = pipDelegate
+        }
+    }
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        commonInit()
+    }
+    
+    required init?(coder: NSCoder) {
+        super.init(coder: coder)
+        commonInit()
+    }
+    
+    private func commonInit() {
+        backgroundColor = .black
+        displayLayer.videoGravity = .resizeAspect
+        #if !os(tvOS)
+        #if compiler(>=6.0)
+            if #available(iOS 26.0, *) {
+                displayLayer.preferredDynamicRange = .automatic
+            } else if #available(iOS 17.0, *) {
+                displayLayer.wantsExtendedDynamicRangeContent = true
+            }
+        #endif
+            if #available(iOS 17.0, *) {
+                displayLayer.wantsExtendedDynamicRangeContent = true
+            }
+        #endif
+        setupPictureInPicture()
+    }
+    
+    private func setupPictureInPicture() {
+        pipController = PiPController(sampleBufferDisplayLayer: displayLayer)
+    }
+    
+    // MARK: - PiP Control Methods
+    
+    func startPictureInPicture() {
+        pipController?.startPictureInPicture()
+    }
+    
+    func stopPictureInPicture() {
+        pipController?.stopPictureInPicture()
+    }
+    
+    var isPictureInPictureSupported: Bool {
+        return pipController?.isPictureInPictureSupported ?? false
+    }
+    
+    var isPictureInPictureActive: Bool {
+        return pipController?.isPictureInPictureActive ?? false
+    }
+    
+    var isPictureInPicturePossible: Bool {
+        return pipController?.isPictureInPicturePossible ?? false
+    }
+}