49 lines
1.7 KiB
Swift
49 lines
1.7 KiB
Swift
//
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// VideoCaptureDelegate.swift
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// Cuvent
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//
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// Created by Marc Rousavy on 14.01.21.
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// Copyright © 2021 Facebook. All rights reserved.
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//
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import AVFoundation
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// Functions like `startRecording(delegate: ...)` only maintain a weak reference on the delegates to prevent memory leaks.
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// In our use case, we exit from the function which will deinit our recording delegate since no other references are being held.
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// That's why we're keeping a strong reference to the delegate by appending it to the `delegateReferences` list and removing it
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// once the delegate has been triggered once.
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private var delegateReferences: [NSObject] = []
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// MARK: - RecordingDelegateWithCallback
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class RecordingDelegateWithCallback: NSObject, AVCaptureFileOutputRecordingDelegate {
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// MARK: Lifecycle
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init(callback: @escaping RCTResponseSenderBlock, resetTorchMode: @escaping () -> Void) {
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self.callback = callback
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self.resetTorchMode = resetTorchMode
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super.init()
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delegateReferences.append(self)
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}
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// MARK: Internal
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func fileOutput(_ output: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from _: [AVCaptureConnection], error: Error?) {
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defer {
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self.resetTorchMode()
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delegateReferences.removeAll(where: { $0 == self })
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}
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if let error = error as NSError? {
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return callback([NSNull(), makeReactError(.capture(.unknown(message: error.description)), cause: error)])
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}
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let seconds = CMTimeGetSeconds(output.recordedDuration)
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return callback([["path": outputFileURL.absoluteString, "duration": seconds, "size": output.recordedFileSize], NSNull()])
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}
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// MARK: Private
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private let callback: RCTResponseSenderBlock // (video?, error?) => void
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private let resetTorchMode: () -> Void
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}
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