84 lines
2.6 KiB
Swift
84 lines
2.6 KiB
Swift
//
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// GifvAttachmentView.swift
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// Tusker
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//
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// Created by Shadowfacts on 5/12/20.
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// Copyright © 2020 Shadowfacts. All rights reserved.
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//
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import UIKit
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import AVFoundation
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class GifvAttachmentView: UIView {
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override class var layerClass: AnyClass {
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return AVPlayerLayer.self
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}
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private var playerLayer: AVPlayerLayer {
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layer as! AVPlayerLayer
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}
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private var asset: AVAsset
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private(set) var item: AVPlayerItem
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let player: AVPlayer
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private var isGrayscale = false
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init(asset: AVAsset, gravity: AVLayerVideoGravity) {
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self.asset = asset
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item = GifvAttachmentView.createItem(asset: asset)
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player = AVPlayer(playerItem: item)
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isGrayscale = Preferences.shared.grayscaleImages
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super.init(frame: .zero)
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playerLayer.player = player
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playerLayer.videoGravity = gravity
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player.isMuted = true
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NotificationCenter.default.addObserver(self, selector: #selector(restartItem), name: .AVPlayerItemDidPlayToEndTime, object: item)
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NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
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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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private static func createItem(asset: AVAsset) -> AVPlayerItem {
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let item = AVPlayerItem(asset: asset)
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if Preferences.shared.grayscaleImages {
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#if os(visionOS)
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#warning("Use async AVVideoComposition CIFilter initializer")
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#else
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item.videoComposition = AVVideoComposition(asset: asset, applyingCIFiltersWithHandler: { (request) in
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let filter = CIFilter(name: "CIColorMonochrome")!
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filter.setValue(request.sourceImage, forKey: "inputImage")
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filter.setValue(CIColor(red: 0.85, green: 0.85, blue: 0.85), forKey: "inputColor")
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filter.setValue(1.0, forKey: "inputIntensity")
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request.finish(with: filter.outputImage!, context: nil)
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})
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#endif
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}
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return item
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}
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@objc private func preferencesChanged() {
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if isGrayscale != Preferences.shared.grayscaleImages {
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isGrayscale = Preferences.shared.grayscaleImages
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item = GifvAttachmentView.createItem(asset: asset)
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player.replaceCurrentItem(with: item)
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player.play()
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}
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}
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@objc private func restartItem() {
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item.seek(to: .zero) { (success) in
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guard success else { return }
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self.player.play()
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}
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}
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}
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