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* Create SampleBufferVideoRenderer.swift * fix rendering * render modes * multitasking camera access * render using AVSampleBufferDisplayLayer * expose layer * params for swift ui * runtime render mode switch
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Sources/LiveKit/Views/InternalSampleBufferVideoRenderer.swift
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/* | ||
* Copyright 2023 LiveKit | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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import Foundation | ||
import WebRTC | ||
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internal class InternalSampleBufferVideoRenderer: NativeView { | ||
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public let sampleBufferDisplayLayer: AVSampleBufferDisplayLayer | ||
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override init(frame: CGRect) { | ||
sampleBufferDisplayLayer = AVSampleBufferDisplayLayer() | ||
super.init(frame: frame) | ||
sampleBufferDisplayLayer.videoGravity = .resizeAspectFill | ||
#if os(macOS) | ||
// this is required for macOS | ||
wantsLayer = true | ||
layer?.insertSublayer(sampleBufferDisplayLayer, at: 0) | ||
#elseif os(iOS) | ||
layer.insertSublayer(sampleBufferDisplayLayer, at: 0) | ||
#else | ||
fatalError("Unimplemented") | ||
#endif | ||
} | ||
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required init?(coder: NSCoder) { | ||
fatalError("init(coder:) has not been implemented") | ||
} | ||
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override func performLayout() { | ||
super.performLayout() | ||
sampleBufferDisplayLayer.frame = bounds | ||
} | ||
} | ||
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extension InternalSampleBufferVideoRenderer: RTCVideoRenderer { | ||
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public func setSize(_ size: CGSize) { | ||
// | ||
} | ||
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public func renderFrame(_ frame: RTCVideoFrame?) { | ||
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guard let frame = frame else { return } | ||
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guard let rtcPixelBuffer = frame.buffer as? RTCCVPixelBuffer else { | ||
logger.warning("frame.buffer is not a RTCCVPixelBuffer") | ||
return | ||
} | ||
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guard let sampleBuffer = CMSampleBuffer.from(rtcPixelBuffer.pixelBuffer) else { | ||
logger.error("Failed to convert CVPixelBuffer to CMSampleBuffer") | ||
return | ||
} | ||
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DispatchQueue.main.async { | ||
self.sampleBufferDisplayLayer.enqueue(sampleBuffer) | ||
} | ||
} | ||
} |
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