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| Original file line number | Diff line number | Diff line change |
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@@ -554,7 +554,6 @@ extension IOStream: IOMixerDelegate { | |
| } | ||
| } | ||
| #endif | ||
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| } | ||
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| extension IOStream: IOTellyUnitDelegate { | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| import AVFoundation | ||
| import CoreGraphics | ||
| import CoreImage | ||
| import Foundation | ||
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| /// An object that manages offscreen rendering a streaming video track source. | ||
| public final class StreamScreenObject: ScreenObject, ChromaKeyProcessable { | ||
| public var chromaKeyColor: CGColor? | ||
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| /// The video is displayed within a player layer’s bounds. | ||
| public var videoGravity: AVLayerVideoGravity = .resizeAspect { | ||
| didSet { | ||
| guard videoGravity != oldValue else { | ||
| return | ||
| } | ||
| invalidateLayout() | ||
| } | ||
| } | ||
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| private var sampleBuffer: CMSampleBuffer? { | ||
| didSet { | ||
| guard sampleBuffer != oldValue else { | ||
| return | ||
| } | ||
| if sampleBuffer == nil { | ||
| return | ||
| } | ||
| invalidateLayout() | ||
| } | ||
| } | ||
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| override public func makeBounds(_ size: CGSize) -> CGRect { | ||
| guard parent != nil, let image = sampleBuffer?.formatDescription?.dimensions.size else { | ||
| return super.makeBounds(size) | ||
| } | ||
| let bounds = super.makeBounds(size) | ||
| switch videoGravity { | ||
| case .resizeAspect: | ||
| let scale = min(bounds.size.width / image.width, bounds.size.height / image.height) | ||
| let scaleSize = CGSize(width: image.width * scale, height: image.height * scale) | ||
| return super.makeBounds(scaleSize) | ||
| case .resizeAspectFill: | ||
| return bounds | ||
| default: | ||
| return bounds | ||
| } | ||
| } | ||
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| override public func makeImage(_ renderer: some ScreenRenderer) -> CGImage? { | ||
| guard let sampleBuffer, let pixelBuffer = sampleBuffer.imageBuffer else { | ||
| return nil | ||
| } | ||
| let image = CIImage(cvPixelBuffer: pixelBuffer).transformed(by: videoGravity.scale( | ||
| bounds.size, | ||
| image: pixelBuffer.size | ||
| )) | ||
| return renderer.context.createCGImage(image, from: videoGravity.region(bounds, image: image.extent)) | ||
| } | ||
| } | ||
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| extension StreamScreenObject: IOStreamObserver { | ||
| // MARK: IOStreamObserver | ||
| public func stream(_ stream: IOStream, didOutput audio: AVAudioBuffer, when: AVAudioTime) { | ||
| } | ||
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| public func stream(_ stream: IOStream, didOutput video: CMSampleBuffer) { | ||
| sampleBuffer = video | ||
| } | ||
| } |