118 lines
3.6 KiB
Swift
118 lines
3.6 KiB
Swift
//
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// Copyright (c) 2020 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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class LocalVideoView: UIView {
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private let localVideoCapturePreview = RTCCameraPreviewView()
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var captureSession: AVCaptureSession? {
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set { localVideoCapturePreview.captureSession = newValue }
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get { localVideoCapturePreview.captureSession }
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}
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override var contentMode: UIView.ContentMode {
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didSet { localVideoCapturePreview.contentMode = contentMode }
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}
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override init(frame: CGRect) {
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super.init(frame: .zero)
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addSubview(localVideoCapturePreview)
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if Platform.isSimulator {
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backgroundColor = .green
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}
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(updateLocalVideoOrientation),
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name: UIDevice.orientationDidChangeNotification,
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object: nil
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)
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override var frame: CGRect {
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didSet { updateLocalVideoOrientation() }
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}
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@objc
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func updateLocalVideoOrientation() {
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defer { localVideoCapturePreview.frame = bounds }
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// iPad supports rotating this view controller directly,
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// so we don't need to do anything here.
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guard !UIDevice.current.isIPad else { return }
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// We lock this view to portrait only on phones, but the
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// local video capture will rotate with the device's
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// orientation (so the remote party will render your video
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// in the correct orientation). As such, we need to rotate
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// the local video preview layer so it *looks* like we're
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// also always capturing in portrait.
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switch UIDevice.current.orientation {
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case .portrait:
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localVideoCapturePreview.transform = .identity
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case .portraitUpsideDown:
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localVideoCapturePreview.transform = .init(rotationAngle: .pi)
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case .landscapeLeft:
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localVideoCapturePreview.transform = .init(rotationAngle: .halfPi)
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case .landscapeRight:
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localVideoCapturePreview.transform = .init(rotationAngle: .pi + .halfPi)
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case .faceUp, .faceDown, .unknown:
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break
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@unknown default:
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break
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}
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}
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}
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extension RTCCameraPreviewView {
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var previewLayer: AVCaptureVideoPreviewLayer? {
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return layer as? AVCaptureVideoPreviewLayer
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}
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open override var contentMode: UIView.ContentMode {
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set {
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guard let previewLayer = previewLayer else {
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return owsFailDebug("missing preview layer")
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}
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switch newValue {
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case .scaleAspectFill:
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previewLayer.videoGravity = .resizeAspectFill
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case .scaleAspectFit:
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previewLayer.videoGravity = .resizeAspect
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case .scaleToFill:
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previewLayer.videoGravity = .resize
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default:
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owsFailDebug("Unexpected contentMode")
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}
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}
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get {
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guard let previewLayer = previewLayer else {
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owsFailDebug("missing preview layer")
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return .scaleToFill
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}
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switch previewLayer.videoGravity {
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case .resizeAspectFill:
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return .scaleAspectFill
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case .resizeAspect:
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return .scaleAspectFit
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case .resize:
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return .scaleToFill
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default:
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owsFailDebug("Unexpected contentMode")
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return .scaleToFill
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}
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}
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}
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}
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