136 lines
4.5 KiB
Swift
136 lines
4.5 KiB
Swift
//
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// MediaPreviewVideoViewController.swift
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// Mastodon
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//
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// Created by MainasuK on 2022-2-9.
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//
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import UIKit
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import AVKit
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import Combine
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import func AVFoundation.AVMakeRect
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final class MediaPreviewVideoViewController: UIViewController {
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var disposeBag = Set<AnyCancellable>()
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var viewModel: MediaPreviewVideoViewModel!
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let playerViewController = AVPlayerViewController()
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let previewImageView = UIImageView()
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deinit {
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playerViewController.player?.pause()
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try? AVAudioSession.sharedInstance().setCategory(.ambient)
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try? AVAudioSession.sharedInstance().setActive(false, options: .notifyOthersOnDeactivation)
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}
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}
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extension MediaPreviewVideoViewController {
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override func viewDidLoad() {
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super.viewDidLoad()
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addChild(playerViewController)
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playerViewController.view.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(playerViewController.view)
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playerViewController.view.pinToParent()
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playerViewController.didMove(toParent: self)
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if let contentOverlayView = playerViewController.contentOverlayView {
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previewImageView.translatesAutoresizingMaskIntoConstraints = false
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contentOverlayView.addSubview(previewImageView)
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previewImageView.pinToParent()
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}
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playerViewController.delegate = self
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playerViewController.view.backgroundColor = .clear
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playerViewController.player = viewModel.player
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playerViewController.allowsPictureInPicturePlayback = true
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switch viewModel.item {
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case .video:
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break
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case .gif:
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playerViewController.showsPlaybackControls = false
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}
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viewModel.player?.play()
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viewModel.playbackState = .playing
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if let previewURL = viewModel.item.previewURL {
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previewImageView.contentMode = .scaleAspectFit
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previewImageView.af.setImage(
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withURL: previewURL,
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placeholderImage: .placeholder(color: .systemFill)
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)
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playerViewController.publisher(for: \.isReadyForDisplay)
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.receive(on: DispatchQueue.main)
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.sink { [weak self] isReadyForDisplay in
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guard let self = self else { return }
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self.previewImageView.isHidden = isReadyForDisplay
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}
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.store(in: &disposeBag)
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}
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}
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override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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playerViewController.didMove(toParent: self)
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}
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}
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// MARK: - ShareActivityProvider
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extension MediaPreviewVideoViewController: MediaPreviewPage {
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func setShowingChrome(_ showingChrome: Bool) {
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// TODO: does this do anything?
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}
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}
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// MARK: - AVPlayerViewControllerDelegate
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extension MediaPreviewVideoViewController: AVPlayerViewControllerDelegate {
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}
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// MARK: - MediaPreviewTransitionViewController
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extension MediaPreviewVideoViewController: MediaPreviewTransitionViewController {
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var mediaPreviewTransitionContext: MediaPreviewTransitionContext? {
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guard let playerView = playerViewController.view else { return nil }
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let _currentFrame: UIImage? = {
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guard let player = playerViewController.player else { return nil }
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guard let asset = player.currentItem?.asset else { return nil }
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let assetImageGenerator = AVAssetImageGenerator(asset: asset)
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assetImageGenerator.appliesPreferredTrackTransform = true // fix orientation
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do {
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let cgImage = try assetImageGenerator.copyCGImage(at: player.currentTime(), actualTime: nil)
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let image = UIImage(cgImage: cgImage)
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return image
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} catch {
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return previewImageView.image
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}
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}()
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let _snapshot: UIView? = {
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guard let currentFrame = _currentFrame else { return nil }
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let size = AVMakeRect(aspectRatio: currentFrame.size, insideRect: view.frame).size
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let imageView = UIImageView(frame: CGRect(origin: .zero, size: size))
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imageView.image = currentFrame
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return imageView
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}()
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guard let snapshot = _snapshot else {
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return nil
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}
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return MediaPreviewTransitionContext(
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transitionView: playerView,
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snapshot: snapshot,
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snapshotTransitioning: snapshot
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)
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}
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}
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