93 lines
2.9 KiB
Swift
93 lines
2.9 KiB
Swift
//
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// GifvController.swift
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// Tusker
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//
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// Created by Shadowfacts on 3/18/24.
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// Copyright © 2024 Shadowfacts. All rights reserved.
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//
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import Foundation
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import AVKit
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import Combine
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@MainActor
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class GifvController {
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private let 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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let presentationSizeSubject = PassthroughSubject<CGSize, Never>()
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private var presentationSizeObservation: NSKeyValueObservation?
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init(asset: AVAsset) {
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self.asset = asset
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self.item = GifvController.createItem(asset: asset)
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self.player = AVPlayer(playerItem: item)
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self.isGrayscale = Preferences.shared.grayscaleImages
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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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updatePresentationSizeObservation()
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}
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func play() {
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if player.rate == 0 {
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player.play()
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}
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}
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func pause() {
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player.pause()
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}
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private func updatePresentationSizeObservation() {
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presentationSizeObservation = item.observe(\.presentationSize, changeHandler: { [unowned self] item, _ in
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self.presentationSizeSubject.send(item.presentationSize)
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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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@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 = GifvController.createItem(asset: asset)
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player.replaceCurrentItem(with: item)
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self.updatePresentationSizeObservation()
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player.play()
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}
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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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}
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