yattee/Model/Player/Backends/MPVBackend.swift
2022-10-27 18:03:57 +02:00

506 lines
14 KiB
Swift

import AVFAudio
import CoreMedia
import Defaults
import Foundation
import Logging
import Repeat
import SwiftUI
final class MPVBackend: PlayerBackend {
static var controlsUpdateInterval = 0.5
static var networkStateUpdateInterval = 0.3
private var logger = Logger(label: "mpv-backend")
var model: PlayerModel!
var controls: PlayerControlsModel!
var playerTime: PlayerTimeModel!
var networkState: NetworkStateModel!
var stream: Stream?
var video: Video?
var captions: Captions? { didSet {
guard let captions = captions else {
client.removeSubs()
return
}
addSubTrack(captions.url)
}}
var currentTime: CMTime?
var loadedVideo = false
var isLoadingVideo = true { didSet {
DispatchQueue.main.async { [weak self] in
guard let self = self else {
return
}
self.controls?.isLoadingVideo = self.isLoadingVideo
self.setNeedsNetworkStateUpdates(true)
self.model?.objectWillChange.send()
}
}}
var isPlaying = true { didSet {
networkStateTimer.start()
if isPlaying {
model.updateAspectRatio()
startClientUpdates()
} else {
stopControlsUpdates()
}
updateControlsIsPlaying()
#if os(macOS)
if isPlaying {
ScreenSaverManager.shared.disable(reason: "Yattee is playing video")
} else {
ScreenSaverManager.shared.enable()
}
#else
DispatchQueue.main.async {
UIApplication.shared.isIdleTimerDisabled = self.model.presentingPlayer && self.isPlaying
}
#endif
}}
var isSeeking = false {
didSet {
DispatchQueue.main.async { [weak self] in
guard let self = self else { return }
self.model.isSeeking = self.isSeeking
}
}
}
var playerItemDuration: CMTime?
#if !os(macOS)
var controller: MPVViewController!
#endif
var client: MPVClient! { didSet { client.backend = self } }
private var clientTimer: Repeater!
private var networkStateTimer: Repeater!
private var onFileLoaded: (() -> Void)?
private var controlsUpdates = false
private var timeObserverThrottle = Throttle(interval: 2)
var tracks: Int {
client?.tracksCount ?? -1
}
var aspectRatio: Double {
client?.aspectRatio ?? VideoPlayerView.defaultAspectRatio
}
var frameDropCount: Int {
client?.frameDropCount ?? 0
}
var outputFps: Double {
client?.outputFps ?? 0
}
var hwDecoder: String {
client?.hwDecoder ?? "unknown"
}
var bufferingState: Double {
client?.bufferingState ?? 0
}
var cacheDuration: Double {
client?.cacheDuration ?? 0
}
init(
model: PlayerModel,
controls: PlayerControlsModel? = nil,
playerTime: PlayerTimeModel? = nil,
networkState: NetworkStateModel? = nil
) {
self.model = model
self.controls = controls
self.playerTime = playerTime
self.networkState = networkState
clientTimer = .init(interval: .seconds(Self.controlsUpdateInterval), mode: .infinite) { [weak self] _ in
self?.getClientUpdates()
}
networkStateTimer = .init(interval: .seconds(Self.networkStateUpdateInterval), mode: .infinite) { [weak self] _ in
self?.updateNetworkState()
}
}
typealias AreInIncreasingOrder = (Stream, Stream) -> Bool
func bestPlayable(_ streams: [Stream], maxResolution: ResolutionSetting) -> Stream? {
streams
.filter { $0.kind != .hls && $0.resolution <= maxResolution.value }
.max { lhs, rhs in
let predicates: [AreInIncreasingOrder] = [
{ $0.resolution < $1.resolution },
{ $0.format > $1.format }
]
for predicate in predicates {
if !predicate(lhs, rhs), !predicate(rhs, lhs) {
continue
}
return predicate(lhs, rhs)
}
return false
} ??
streams.first { $0.kind == .hls } ??
streams.first
}
func canPlay(_ stream: Stream) -> Bool {
stream.resolution != .unknown && stream.format != .av1
}
func playStream(_ stream: Stream, of video: Video, preservingTime: Bool, upgrading _: Bool) {
#if !os(macOS)
if model.presentingPlayer {
UIApplication.shared.isIdleTimerDisabled = true
}
#endif
var captions: Captions?
if let captionsLanguageCode = Defaults[.captionsLanguageCode] {
captions = video.captions.first { $0.code == captionsLanguageCode } ??
video.captions.first { $0.code.contains(captionsLanguageCode) }
}
let updateCurrentStream = {
DispatchQueue.main.async { [weak self] in
self?.stream = stream
self?.video = video
self?.model.stream = stream
self?.captions = captions
}
}
let startPlaying = {
#if !os(macOS)
try? AVAudioSession.sharedInstance().setActive(true)
#endif
DispatchQueue.main.async { [weak self] in
guard let self = self else {
return
}
self.startClientUpdates()
if !preservingTime,
let segment = self.model.sponsorBlock.segments.first,
self.model.lastSkipped.isNil
{
self.seek(to: segment.endTime) { finished in
guard finished else {
return
}
self.model.lastSkipped = segment
self.play()
}
} else {
self.play()
}
}
}
let replaceItem: (CMTime?) -> Void = { [weak self] time in
guard let self = self else {
return
}
self.stop()
DispatchQueue.main.async { [weak self] in
guard let self = self else {
return
}
if let url = stream.singleAssetURL {
self.onFileLoaded = {
updateCurrentStream()
startPlaying()
}
self.client.loadFile(url, sub: captions?.url, time: time) { [weak self] _ in
self?.isLoadingVideo = true
}
} else {
self.onFileLoaded = {
updateCurrentStream()
startPlaying()
}
let fileToLoad = self.model.musicMode ? stream.audioAsset.url : stream.videoAsset.url
let audioTrack = self.model.musicMode ? nil : stream.audioAsset.url
self.client?.loadFile(fileToLoad, audio: audioTrack, sub: captions?.url, time: time) { [weak self] _ in
self?.isLoadingVideo = true
self?.pause()
}
}
}
}
if preservingTime {
if model.preservedTime.isNil {
model.saveTime {
replaceItem(self.model.preservedTime)
}
} else {
replaceItem(self.model.preservedTime)
}
} else {
replaceItem(nil)
}
startClientUpdates()
}
func play() {
isPlaying = true
startClientUpdates()
if controls?.presentingControls ?? false {
startControlsUpdates()
}
setRate(model.currentRate)
client?.play()
}
func pause() {
isPlaying = false
stopClientUpdates()
client?.pause()
}
func togglePlay() {
isPlaying ? pause() : play()
}
func stop() {
client?.stop()
}
func seek(to time: CMTime, completionHandler: ((Bool) -> Void)?) {
client?.seek(to: time) { [weak self] _ in
self?.getClientUpdates()
self?.updateControls()
completionHandler?(true)
}
}
func seek(relative time: CMTime, completionHandler: ((Bool) -> Void)? = nil) {
client?.seek(relative: time) { [weak self] _ in
self?.getClientUpdates()
self?.updateControls()
completionHandler?(true)
}
}
func setRate(_ rate: Float) {
client?.setDoubleAsync("speed", Double(rate))
}
func closeItem() {
client?.pause()
client?.stop()
}
func closePiP(wasPlaying _: Bool) {}
func updateControls() {
self.logger.info("updating controls")
guard model.presentingPlayer, !model.controls.presentingOverlays else {
self.logger.info("ignored controls update")
return
}
DispatchQueue.main.async { [weak self] in
guard let self = self else {
return
}
self.playerTime.currentTime = self.currentTime ?? .zero
self.playerTime.duration = self.playerItemDuration ?? .zero
}
}
func startControlsUpdates() {
guard model.presentingPlayer, model.controls.presentingControls, !model.controls.presentingOverlays else {
self.logger.info("ignored controls update start")
return
}
self.logger.info("starting controls updates")
controlsUpdates = true
}
func stopControlsUpdates() {
self.logger.info("stopping controls updates")
controlsUpdates = false
}
func startClientUpdates() {
clientTimer.start()
}
private var handleSegmentsThrottle = Throttle(interval: 1)
private func getClientUpdates() {
currentTime = client?.currentTime
playerItemDuration = client?.duration
if controlsUpdates {
updateControls()
}
model.updateNowPlayingInfo()
handleSegmentsThrottle.execute {
if let currentTime = currentTime {
model.handleSegments(at: currentTime)
}
}
timeObserverThrottle.execute {
self.model.updateWatch()
}
}
private func stopClientUpdates() {
clientTimer.pause()
}
private func updateControlsIsPlaying() {
DispatchQueue.main.async { [weak self] in
self?.controls?.isPlaying = self?.isPlaying ?? false
}
}
func handle(_ event: UnsafePointer<mpv_event>!) {
logger.info(.init(stringLiteral: "RECEIVED event: \(String(cString: mpv_event_name(event.pointee.event_id)))"))
switch event.pointee.event_id {
case MPV_EVENT_SHUTDOWN:
mpv_destroy(client.mpv)
client.mpv = nil
case MPV_EVENT_LOG_MESSAGE:
let logmsg = UnsafeMutablePointer<mpv_event_log_message>(OpaquePointer(event.pointee.data))
logger.info(.init(stringLiteral: "\(String(cString: (logmsg!.pointee.prefix)!)), "
+ "\(String(cString: (logmsg!.pointee.level)!)), "
+ "\(String(cString: (logmsg!.pointee.text)!))"))
case MPV_EVENT_FILE_LOADED:
onFileLoaded?()
startClientUpdates()
onFileLoaded = nil
case MPV_EVENT_PLAYBACK_RESTART:
isLoadingVideo = false
isSeeking = false
onFileLoaded?()
startClientUpdates()
onFileLoaded = nil
case MPV_EVENT_PAUSE:
DispatchQueue.main.async { [weak self] in self?.handleEndOfFile() }
isPlaying = false
networkStateTimer.start()
case MPV_EVENT_UNPAUSE:
isPlaying = true
isLoadingVideo = false
isSeeking = false
networkStateTimer.start()
case MPV_EVENT_SEEK:
isSeeking = true
case MPV_EVENT_END_FILE:
DispatchQueue.main.async { [weak self] in self?.handleEndOfFile() }
default:
logger.info(.init(stringLiteral: "UNHANDLED event: \(String(cString: mpv_event_name(event.pointee.event_id)))"))
}
}
func handleEndOfFile() {
guard client.eofReached else {
return
}
getClientUpdates()
eofPlaybackModeAction()
}
func setNeedsDrawing(_ needsDrawing: Bool) {
client?.setNeedsDrawing(needsDrawing)
}
func setSize(_ width: Double, _ height: Double) {
client?.setSize(width, height)
}
func addVideoTrack(_ url: URL) {
client?.addVideoTrack(url)
}
func addSubTrack(_ url: URL) {
client?.removeSubs()
client?.addSubTrack(url)
}
func setVideoToAuto() {
client?.setVideoToAuto()
}
func setVideoToNo() {
client?.setVideoToNo()
}
func updateNetworkState() {
guard let client = client, let networkState = networkState else {
return
}
DispatchQueue.main.async {
networkState.pausedForCache = client.pausedForCache
networkState.cacheDuration = client.cacheDuration
networkState.bufferingState = client.bufferingState
}
if !networkState.needsUpdates {
networkStateTimer.pause()
}
}
func setNeedsNetworkStateUpdates(_ needsUpdates: Bool) {
if needsUpdates {
networkStateTimer.start()
} else {
networkStateTimer.pause()
}
}
}