yattee/Model/Player/Backends/PlayerBackend.swift

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Swift
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import CoreMedia
import Defaults
import Foundation
#if !os(macOS)
import UIKit
#endif
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protocol PlayerBackend {
var model: PlayerModel! { get set }
var controls: PlayerControlsModel! { get set }
var playerTime: PlayerTimeModel! { get set }
var networkState: NetworkStateModel! { get set }
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var stream: Stream? { get set }
var video: Video? { get set }
var currentTime: CMTime? { get }
var loadedVideo: Bool { get }
var isLoadingVideo: Bool { get }
var isPlaying: Bool { get }
var isSeeking: Bool { get }
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var playerItemDuration: CMTime? { get }
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var aspectRatio: Double { get }
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var controlsUpdates: Bool { get }
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func bestPlayable(_ streams: [Stream], maxResolution: ResolutionSetting) -> Stream?
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func canPlay(_ stream: Stream) -> Bool
func playStream(
_ stream: Stream,
of video: Video,
preservingTime: Bool,
upgrading: Bool
)
func play()
func pause()
func togglePlay()
func stop()
func seek(to time: CMTime, seekType: PlayerTimeModel.SeekType, completionHandler: ((Bool) -> Void)?)
func seek(to seconds: Double, seekType: PlayerTimeModel.SeekType, completionHandler: ((Bool) -> Void)?)
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func setRate(_ rate: Float)
func closeItem()
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func closePiP()
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func startMusicMode()
func stopMusicMode()
func getTimeUpdates()
func updateControls(completionHandler: (() -> Void)?)
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func startControlsUpdates()
func stopControlsUpdates()
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func didChangeTo()
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func setNeedsNetworkStateUpdates(_ needsUpdates: Bool)
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func setNeedsDrawing(_ needsDrawing: Bool)
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func setSize(_ width: Double, _ height: Double)
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}
extension PlayerBackend {
func seek(to time: CMTime, seekType: PlayerTimeModel.SeekType, completionHandler: ((Bool) -> Void)? = nil) {
playerTime.registerSeek(at: time, type: seekType, restore: currentTime)
seek(to: time, seekType: seekType, completionHandler: completionHandler)
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}
func seek(to seconds: Double, seekType: PlayerTimeModel.SeekType, completionHandler: ((Bool) -> Void)? = nil) {
let seconds = CMTime.secondsInDefaultTimescale(seconds)
playerTime.registerSeek(at: seconds, type: seekType, restore: currentTime)
seek(to: seconds, seekType: seekType, completionHandler: completionHandler)
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}
func seek(relative time: CMTime, seekType: PlayerTimeModel.SeekType, completionHandler: ((Bool) -> Void)? = nil) {
if let currentTime = currentTime, let duration = playerItemDuration {
let seekTime = min(max(0, currentTime.seconds + time.seconds), duration.seconds)
playerTime.registerSeek(at: .secondsInDefaultTimescale(seekTime), type: seekType, restore: currentTime)
seek(to: seekTime, seekType: seekType, completionHandler: completionHandler)
}
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}
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func eofPlaybackModeAction() {
switch model.playbackMode {
case .queue, .shuffle:
if Defaults[.closeLastItemOnPlaybackEnd] {
model.prepareCurrentItemForHistory(finished: true)
}
if model.queue.isEmpty {
if Defaults[.closeLastItemOnPlaybackEnd] {
model.resetQueue()
model.hide()
}
} else {
model.advanceToNextItem()
}
case .loopOne:
model.backend.seek(to: .zero, seekType: .loopRestart) { _ in
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self.model.play()
}
case .related:
guard let item = model.autoplayItem else { return }
model.resetAutoplay()
model.advanceToItem(item)
}
}
func updateControls(completionHandler: (() -> Void)? = nil) {
print("updating controls")
guard model.presentingPlayer, !model.controls.presentingOverlays else {
print("ignored controls update")
completionHandler?()
return
}
DispatchQueue.main.async(qos: .userInteractive) {
#if !os(macOS)
guard UIApplication.shared.applicationState != .background else {
print("not performing controls updates in background")
completionHandler?()
return
}
#endif
self.playerTime.currentTime = self.currentTime ?? .zero
self.playerTime.duration = self.playerItemDuration ?? .zero
completionHandler?()
}
}
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}