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https://github.com/yattee/yattee.git
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688 lines
21 KiB
Swift
688 lines
21 KiB
Swift
import AVFoundation
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import Defaults
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import Foundation
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import Logging
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import MediaPlayer
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#if !os(macOS)
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import UIKit
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#endif
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final class AVPlayerBackend: PlayerBackend {
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static let assetKeysToLoad = ["tracks", "playable", "duration"]
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private var logger = Logger(label: "avplayer-backend")
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var model: PlayerModel! { .shared }
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var controls: PlayerControlsModel! { .shared }
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var playerTime: PlayerTimeModel! { .shared }
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var networkState: NetworkStateModel! { .shared }
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var seek: SeekModel! { .shared }
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var stream: Stream?
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var video: Video?
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var currentTime: CMTime? {
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avPlayer.currentTime()
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}
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var loadedVideo: Bool {
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!avPlayer.currentItem.isNil
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}
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var isLoadingVideo: Bool {
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model.currentItem == nil || model.time == nil || !model.time!.isValid
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}
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var isPlaying: Bool {
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avPlayer.timeControlStatus == .playing
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}
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var aspectRatio: Double {
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#if os(iOS)
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playerLayer.videoRect.width / playerLayer.videoRect.height
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#else
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VideoPlayerView.defaultAspectRatio
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#endif
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}
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var isSeeking: Bool {
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// TODO: implement this maybe?
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false
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}
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var playerItemDuration: CMTime? {
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avPlayer.currentItem?.asset.duration
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}
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private(set) var avPlayer = AVPlayer()
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private(set) var playerLayer = AVPlayerLayer()
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#if os(tvOS)
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var controller: AppleAVPlayerViewController?
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#endif
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var startPictureInPictureOnPlay = false
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var startPictureInPictureOnSwitch = false
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private var asset: AVURLAsset?
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private var composition = AVMutableComposition()
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private var loadedCompositionAssets = [AVMediaType]()
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private var frequentTimeObserver: Any?
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private var infrequentTimeObserver: Any?
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private var playerTimeControlStatusObserver: Any?
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private var statusObservation: NSKeyValueObservation?
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private var timeObserverThrottle = Throttle(interval: 2)
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internal var controlsUpdates = false
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init() {
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addFrequentTimeObserver()
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addInfrequentTimeObserver()
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addPlayerTimeControlStatusObserver()
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playerLayer.player = avPlayer
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}
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func bestPlayable(_ streams: [Stream], maxResolution: ResolutionSetting) -> Stream? {
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let sortedByResolution = streams
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.filter { ($0.kind == .adaptive || $0.kind == .stream) && $0.resolution <= maxResolution.value }
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.sorted { $0.resolution > $1.resolution }
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return streams.first { $0.kind == .hls } ??
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sortedByResolution.first { $0.kind == .stream } ??
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sortedByResolution.first
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}
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func canPlay(_ stream: Stream) -> Bool {
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stream.kind == .hls || stream.kind == .stream || (stream.kind == .adaptive && stream.format == .mp4)
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}
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func playStream(
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_ stream: Stream,
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of video: Video,
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preservingTime: Bool,
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upgrading _: Bool
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) {
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if let url = stream.singleAssetURL {
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model.logger.info("playing stream with one asset\(stream.kind == .hls ? " (HLS)" : ""): \(url)")
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loadSingleAsset(url, stream: stream, of: video, preservingTime: preservingTime)
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} else {
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model.logger.info("playing stream with many assets:")
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model.logger.info("composition audio asset: \(stream.audioAsset.url)")
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model.logger.info("composition video asset: \(stream.videoAsset.url)")
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loadComposition(stream, of: video, preservingTime: preservingTime)
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}
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}
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func play() {
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guard avPlayer.timeControlStatus != .playing else {
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return
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}
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avPlayer.play()
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model.objectWillChange.send()
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}
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func pause() {
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guard avPlayer.timeControlStatus != .paused else {
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return
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}
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avPlayer.pause()
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model.objectWillChange.send()
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}
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func togglePlay() {
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isPlaying ? pause() : play()
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}
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func stop() {
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avPlayer.replaceCurrentItem(with: nil)
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}
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func seek(to time: CMTime, seekType _: SeekType, completionHandler: ((Bool) -> Void)?) {
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guard !model.live else { return }
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avPlayer.seek(
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to: time,
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toleranceBefore: .zero,
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toleranceAfter: .zero,
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completionHandler: completionHandler ?? { _ in }
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)
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}
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func setRate(_ rate: Float) {
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avPlayer.rate = rate
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}
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func closeItem() {
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avPlayer.replaceCurrentItem(with: nil)
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video = nil
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stream = nil
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}
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func closePiP() {
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model.pipController?.stopPictureInPicture()
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}
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private func loadSingleAsset(
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_ url: URL,
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stream: Stream,
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of video: Video,
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preservingTime: Bool = false
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) {
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asset?.cancelLoading()
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asset = AVURLAsset(url: url)
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asset?.loadValuesAsynchronously(forKeys: Self.assetKeysToLoad) { [weak self] in
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var error: NSError?
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switch self?.asset?.statusOfValue(forKey: "duration", error: &error) {
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case .loaded:
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DispatchQueue.main.async { [weak self] in
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self?.insertPlayerItem(stream, for: video, preservingTime: preservingTime)
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}
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case .failed:
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DispatchQueue.main.async { [weak self] in
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self?.model.playerError = error
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}
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default:
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return
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}
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}
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}
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private func loadComposition(
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_ stream: Stream,
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of video: Video,
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preservingTime: Bool = false
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) {
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loadedCompositionAssets = []
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loadCompositionAsset(stream.audioAsset, stream: stream, type: .audio, of: video, preservingTime: preservingTime, model: model)
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loadCompositionAsset(stream.videoAsset, stream: stream, type: .video, of: video, preservingTime: preservingTime, model: model)
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}
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private func loadCompositionAsset(
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_ asset: AVURLAsset,
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stream: Stream,
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type: AVMediaType,
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of video: Video,
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preservingTime: Bool = false,
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model: PlayerModel
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) {
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asset.loadValuesAsynchronously(forKeys: Self.assetKeysToLoad) { [weak self] in
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guard let self else {
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return
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}
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model.logger.info("loading \(type.rawValue) track")
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let assetTracks = asset.tracks(withMediaType: type)
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guard let compositionTrack = self.composition.addMutableTrack(
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withMediaType: type,
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preferredTrackID: kCMPersistentTrackID_Invalid
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) else {
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model.logger.critical("composition \(type.rawValue) addMutableTrack FAILED")
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return
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}
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guard let assetTrack = assetTracks.first else {
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model.logger.critical("asset \(type.rawValue) track FAILED")
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return
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}
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try! compositionTrack.insertTimeRange(
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CMTimeRange(start: .zero, duration: CMTime.secondsInDefaultTimescale(video.length)),
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of: assetTrack,
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at: .zero
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)
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model.logger.critical("\(type.rawValue) LOADED")
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guard model.streamSelection == stream else {
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model.logger.critical("IGNORING LOADED")
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return
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}
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self.loadedCompositionAssets.append(type)
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if self.loadedCompositionAssets.count == 2 {
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self.insertPlayerItem(stream, for: video, preservingTime: preservingTime)
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}
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}
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}
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private func insertPlayerItem(
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_ stream: Stream,
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for video: Video,
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preservingTime: Bool = false
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) {
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removeItemDidPlayToEndTimeObserver()
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model.playerItem = playerItem(stream)
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guard model.playerItem != nil else {
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return
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}
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addItemDidPlayToEndTimeObserver()
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attachMetadata()
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DispatchQueue.main.async {
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self.stream = stream
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self.video = video
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self.model.stream = stream
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self.composition = AVMutableComposition()
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self.asset = nil
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}
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let startPlaying = {
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#if !os(macOS)
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try? AVAudioSession.sharedInstance().setActive(true)
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#endif
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self.setRate(self.model.currentRate)
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guard let item = self.model.playerItem, self.isAutoplaying(item) else { return }
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DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in
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guard let self else {
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return
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}
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if !preservingTime,
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!self.model.transitioningToPiP,
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let segment = self.model.sponsorBlock.segments.first,
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segment.start < 3,
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self.model.lastSkipped.isNil
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{
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self.avPlayer.seek(
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to: segment.endTime,
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toleranceBefore: .secondsInDefaultTimescale(1),
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toleranceAfter: .zero
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) { finished in
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guard finished else {
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return
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}
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self.model.lastSkipped = segment
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self.model.play()
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}
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} else {
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self.model.play()
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}
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}
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}
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let replaceItemAndSeek = {
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guard video == self.model.currentVideo else {
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return
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}
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self.avPlayer.replaceCurrentItem(with: self.model.playerItem)
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self.seekToPreservedTime { finished in
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guard finished else {
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return
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}
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DispatchQueue.main.async { [weak self] in
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self?.model.preservedTime = nil
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}
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startPlaying()
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}
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}
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if preservingTime {
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if model.preservedTime.isNil {
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model.saveTime {
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replaceItemAndSeek()
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startPlaying()
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}
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} else {
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replaceItemAndSeek()
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startPlaying()
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}
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} else {
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avPlayer.replaceCurrentItem(with: model.playerItem)
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startPlaying()
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}
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}
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private func seekToPreservedTime(completionHandler: @escaping (Bool) -> Void = { _ in }) {
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guard let time = model.preservedTime else {
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return
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}
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avPlayer.seek(
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to: time,
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toleranceBefore: .secondsInDefaultTimescale(1),
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toleranceAfter: .zero,
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completionHandler: completionHandler
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)
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}
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private func playerItem(_: Stream) -> AVPlayerItem? {
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if let asset {
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return AVPlayerItem(asset: asset)
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} else {
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return AVPlayerItem(asset: composition)
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}
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}
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private func attachMetadata() {
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guard let video = model.currentVideo else { return }
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#if !os(macOS)
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var externalMetadata = [
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makeMetadataItem(.commonIdentifierTitle, value: video.title),
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makeMetadataItem(.quickTimeMetadataGenre, value: video.genre ?? ""),
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makeMetadataItem(.commonIdentifierDescription, value: video.description ?? "")
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]
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if let thumbnailURL = video.thumbnailURL(quality: .medium) {
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let task = URLSession.shared.dataTask(with: thumbnailURL) { [weak self] thumbnailData, _, _ in
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guard let thumbnailData else { return }
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let image = UIImage(data: thumbnailData)
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if let pngData = image?.pngData() {
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if let artworkItem = self?.makeMetadataItem(.commonIdentifierArtwork, value: pngData) {
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externalMetadata.append(artworkItem)
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}
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}
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self?.avPlayer.currentItem?.externalMetadata = externalMetadata
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}
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task.resume()
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}
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#endif
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if let item = model.playerItem {
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#if !os(macOS)
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item.externalMetadata = externalMetadata
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#endif
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item.preferredForwardBufferDuration = 5
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observePlayerItemStatus(item)
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}
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}
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#if !os(macOS)
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private func makeMetadataItem(_ identifier: AVMetadataIdentifier, value: Any) -> AVMetadataItem {
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let item = AVMutableMetadataItem()
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item.identifier = identifier
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item.value = value as? NSCopying & NSObjectProtocol
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item.extendedLanguageTag = "und"
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return item.copy() as! AVMetadataItem
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}
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#endif
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func isAutoplaying(_ item: AVPlayerItem) -> Bool {
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avPlayer.currentItem == item
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}
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private func observePlayerItemStatus(_ item: AVPlayerItem) {
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statusObservation?.invalidate()
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statusObservation = item.observe(\.status, options: [.old, .new]) { [weak self] playerItem, _ in
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guard let self else {
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return
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}
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switch playerItem.status {
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case .readyToPlay:
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if self.model.playingInPictureInPicture {
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self.startPictureInPictureOnSwitch = false
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self.startPictureInPictureOnPlay = false
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}
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if self.model.activeBackend == .appleAVPlayer,
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self.isAutoplaying(playerItem)
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{
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self.model.updateAspectRatio()
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if self.startPictureInPictureOnPlay,
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let controller = self.model.pipController,
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controller.isPictureInPicturePossible
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{
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self.tryStartingPictureInPicture()
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} else {
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self.model.play()
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}
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} else if self.startPictureInPictureOnPlay {
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self.startPictureInPictureOnPlay = false
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self.model.stream = self.stream
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self.model.streamSelection = self.stream
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if self.model.activeBackend != .appleAVPlayer {
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self.startPictureInPictureOnSwitch = true
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let seconds = self.model.mpvBackend.currentTime?.seconds ?? 0
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self.seek(to: seconds, seekType: .backendSync) { _ in
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DispatchQueue.main.async {
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self.model.pause()
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self.model.changeActiveBackend(from: .mpv, to: .appleAVPlayer, changingStream: false)
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}
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}
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}
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}
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case .failed:
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DispatchQueue.main.async {
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self.model.playerError = item.error
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}
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default:
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return
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}
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}
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}
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private func addItemDidPlayToEndTimeObserver() {
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(itemDidPlayToEndTime),
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name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
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object: model.playerItem
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)
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}
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private func removeItemDidPlayToEndTimeObserver() {
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NotificationCenter.default.removeObserver(
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self,
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name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
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object: model.playerItem
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)
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}
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@objc func itemDidPlayToEndTime() {
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if Defaults[.closeLastItemOnPlaybackEnd] {
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model.prepareCurrentItemForHistory(finished: true)
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}
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eofPlaybackModeAction()
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}
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private func addFrequentTimeObserver() {
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let interval = CMTime.secondsInDefaultTimescale(0.5)
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frequentTimeObserver = avPlayer.addPeriodicTimeObserver(
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forInterval: interval,
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queue: .main
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) { [weak self] _ in
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guard let self, self.model.activeBackend == .appleAVPlayer else {
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return
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}
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guard !self.model.currentItem.isNil else {
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return
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}
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self.model.updateNowPlayingInfo()
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#if os(macOS)
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MPNowPlayingInfoCenter.default().playbackState = self.avPlayer.timeControlStatus == .playing ? .playing : .paused
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#endif
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if self.controls.isPlaying != self.isPlaying {
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DispatchQueue.main.async {
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self.controls.isPlaying = self.isPlaying
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}
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}
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if let currentTime = self.currentTime {
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self.model.handleSegments(at: currentTime)
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}
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#if !os(macOS)
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guard UIApplication.shared.applicationState != .background else {
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print("not performing controls updates in background")
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return
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}
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#endif
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if self.controlsUpdates {
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self.updateControls()
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}
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}
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}
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private func addInfrequentTimeObserver() {
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let interval = CMTime.secondsInDefaultTimescale(5)
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infrequentTimeObserver = avPlayer.addPeriodicTimeObserver(
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forInterval: interval,
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queue: .main
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) { [weak self] _ in
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guard let self else {
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return
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}
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guard !self.model.currentItem.isNil else {
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return
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}
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self.timeObserverThrottle.execute {
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self.model.updateWatch()
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}
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}
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}
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private func addPlayerTimeControlStatusObserver() {
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playerTimeControlStatusObserver = avPlayer.observe(\.timeControlStatus) { [weak self] player, _ in
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guard let self,
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self.avPlayer == player,
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self.model.activeBackend == .appleAVPlayer
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else {
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return
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}
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let isPlaying = player.timeControlStatus == .playing
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if self.controls.isPlaying != isPlaying {
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DispatchQueue.main.async {
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self.controls.isPlaying = player.timeControlStatus == .playing
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}
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}
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if player.timeControlStatus != .waitingToPlayAtSpecifiedRate {
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DispatchQueue.main.async { [weak self] in
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self?.model.objectWillChange.send()
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}
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}
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if player.timeControlStatus == .playing {
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self.model.objectWillChange.send()
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|
if player.rate != self.model.currentRate {
|
|
player.rate = self.model.currentRate
|
|
}
|
|
}
|
|
|
|
#if os(macOS)
|
|
if player.timeControlStatus == .playing {
|
|
ScreenSaverManager.shared.disable(reason: "Yattee is playing video")
|
|
} else {
|
|
ScreenSaverManager.shared.enable()
|
|
}
|
|
#endif
|
|
|
|
self.timeObserverThrottle.execute {
|
|
self.model.updateWatch()
|
|
}
|
|
}
|
|
}
|
|
|
|
func startControlsUpdates() {
|
|
guard model.presentingPlayer, model.controls.presentingControls, !model.controls.presentingOverlays else {
|
|
logger.info("ignored controls update start")
|
|
return
|
|
}
|
|
logger.info("starting controls updates")
|
|
controlsUpdates = true
|
|
model.objectWillChange.send()
|
|
}
|
|
|
|
func stopControlsUpdates() {
|
|
controlsUpdates = false
|
|
model.objectWillChange.send()
|
|
}
|
|
|
|
func startMusicMode() {
|
|
if model.playingInPictureInPicture {
|
|
closePiP()
|
|
}
|
|
|
|
playerLayer.player = nil
|
|
|
|
toggleVisualTracksEnabled(false)
|
|
}
|
|
|
|
func stopMusicMode() {
|
|
playerLayer.player = avPlayer
|
|
|
|
toggleVisualTracksEnabled(true)
|
|
}
|
|
|
|
func toggleVisualTracksEnabled(_ value: Bool) {
|
|
if let item = avPlayer.currentItem {
|
|
for playerItemTrack in item.tracks {
|
|
if let assetTrack = playerItemTrack.assetTrack,
|
|
assetTrack.hasMediaCharacteristic(AVMediaCharacteristic.visual)
|
|
{
|
|
playerItemTrack.isEnabled = value
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func didChangeTo() {
|
|
if startPictureInPictureOnSwitch {
|
|
startPictureInPictureOnSwitch = false
|
|
tryStartingPictureInPicture()
|
|
} else if model.musicMode {
|
|
startMusicMode()
|
|
} else {
|
|
stopMusicMode()
|
|
}
|
|
}
|
|
|
|
func tryStartingPictureInPicture() {
|
|
guard let controller = model.pipController else { return }
|
|
|
|
var opened = false
|
|
for delay in [0.1, 0.3, 0.5, 1, 2, 3, 5] {
|
|
Delay.by(delay) {
|
|
guard !opened else { return }
|
|
if controller.isPictureInPicturePossible {
|
|
opened = true
|
|
controller.startPictureInPicture()
|
|
} else {
|
|
print("PiP not possible, waited \(delay) seconds")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func getTimeUpdates() {}
|
|
func setNeedsDrawing(_: Bool) {}
|
|
func setSize(_: Double, _: Double) {}
|
|
func setNeedsNetworkStateUpdates(_: Bool) {}
|
|
}
|