mirror of
https://github.com/dirtydishes/dreamio.git
synced 2026-06-06 13:37:24 +00:00
365 lines
10 KiB
Swift
365 lines
10 KiB
Swift
import UIKit
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#if canImport(MobileVLCKit)
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import MobileVLCKit
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#endif
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final class VLCNativePlaybackBackend: NSObject, NativePlaybackBackend {
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static var isAvailable: Bool {
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#if canImport(MobileVLCKit)
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true
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#else
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false
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#endif
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}
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let view = UIView()
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var onReady: (() -> Void)?
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var onFailure: ((Error) -> Void)?
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var onStateChange: (() -> Void)?
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var onSubtitleTracksChange: (() -> Void)?
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#if canImport(MobileVLCKit)
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private let mediaPlayer = VLCMediaPlayer()
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#endif
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private var attachedSubtitleURLs = Set<URL>()
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private var didAutoSelectSubtitleTrack = false
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private var didUserSelectSubtitleTrack = false
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private var autoSelectedSubtitleTrackID: Int32?
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override init() {
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super.init()
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#if canImport(MobileVLCKit)
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mediaPlayer.delegate = self
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#endif
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view.backgroundColor = .black
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}
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func prepare(in viewController: UIViewController) {
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#if canImport(MobileVLCKit)
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mediaPlayer.drawable = view
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#endif
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}
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func play(request: NativePlaybackRequest) {
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#if canImport(MobileVLCKit)
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attachedSubtitleURLs.removeAll()
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didAutoSelectSubtitleTrack = false
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didUserSelectSubtitleTrack = false
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autoSelectedSubtitleTrackID = nil
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let media = VLCMedia(url: request.playbackURL)
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let headerValue = request.headers
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.map { "\($0.key): \($0.value)" }
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.joined(separator: "\r\n")
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media.addOption(":http-referrer=\(request.referer)")
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if let userAgent = request.userAgent {
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media.addOption(":http-user-agent=\(userAgent)")
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}
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if !headerValue.isEmpty {
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media.addOption(":http-header=\(headerValue)")
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}
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mediaPlayer.media = media
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#if DEBUG
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print("[DreamioVLC] opening url=\(URLRedactor.redactedURLString(request.playbackURL.absoluteString))")
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#endif
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mediaPlayer.play()
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#else
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onFailure?(NativePlaybackError.backendUnavailable)
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#endif
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}
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func play() {
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#if canImport(MobileVLCKit)
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mediaPlayer.play()
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#endif
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}
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func pause() {
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#if canImport(MobileVLCKit)
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mediaPlayer.pause()
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#endif
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}
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func togglePlayPause() {
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isPlaying ? pause() : play()
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}
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func seek(to position: Float) {
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#if canImport(MobileVLCKit)
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guard isSeekable else {
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return
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}
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mediaPlayer.position = max(0, min(1, position))
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#endif
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}
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func jump(by seconds: TimeInterval) {
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#if canImport(MobileVLCKit)
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guard isSeekable else {
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return
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}
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let nextTime = max(0, min(duration, currentTime + seconds))
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mediaPlayer.time = VLCTime(int: Int32(nextTime * 1000))
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#endif
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}
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func selectSubtitleTrack(id: Int32) {
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#if canImport(MobileVLCKit)
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didUserSelectSubtitleTrack = true
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autoSelectedSubtitleTrackID = nil
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#if DEBUG
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logSubtitleTracks(reason: "before-select-\(id)")
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#endif
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mediaPlayer.currentVideoSubTitleIndex = id
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#if DEBUG
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logSubtitleTracks(reason: "after-select-\(id)")
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#endif
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onSubtitleTracksChange?()
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#endif
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}
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func adjustSubtitleDelay(by seconds: TimeInterval) {
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#if canImport(MobileVLCKit)
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#if DEBUG
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print("[DreamioVLC] subtitle delay before=\(subtitleDelay) delta=\(seconds)")
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#endif
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mediaPlayer.currentVideoSubTitleDelay += Int(seconds * 1_000_000)
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#if DEBUG
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print("[DreamioVLC] subtitle delay after=\(subtitleDelay)")
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#endif
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onSubtitleTracksChange?()
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#endif
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}
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@discardableResult
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func addSubtitleCandidates(_ candidates: [SubtitleCandidate]) -> Int {
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#if canImport(MobileVLCKit)
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return attachSubtitles(candidates)
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#else
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return 0
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#endif
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}
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func stop() {
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#if canImport(MobileVLCKit)
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mediaPlayer.stop()
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mediaPlayer.drawable = nil
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mediaPlayer.media = nil
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#endif
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}
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var isPlaying: Bool {
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#if canImport(MobileVLCKit)
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mediaPlayer.isPlaying
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#else
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false
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#endif
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}
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var isSeekable: Bool {
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#if canImport(MobileVLCKit)
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mediaPlayer.isSeekable
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#else
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false
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#endif
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}
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var duration: TimeInterval {
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#if canImport(MobileVLCKit)
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TimeInterval(max(0, mediaPlayer.media?.length.intValue ?? 0)) / 1000
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#else
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0
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#endif
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}
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var currentTime: TimeInterval {
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#if canImport(MobileVLCKit)
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TimeInterval(max(0, mediaPlayer.time.intValue)) / 1000
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#else
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0
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#endif
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}
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var remainingTime: TimeInterval {
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max(0, duration - currentTime)
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}
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var position: Float {
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#if canImport(MobileVLCKit)
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mediaPlayer.position
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#else
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0
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#endif
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}
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var subtitleTracks: [SubtitleTrack] {
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#if canImport(MobileVLCKit)
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let names = mediaPlayer.videoSubTitlesNames as? [String] ?? []
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let indexes = mediaPlayer.videoSubTitlesIndexes as? [NSNumber] ?? []
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return zip(indexes, names).map { index, name in
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SubtitleTrack(id: index.int32Value, name: name)
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}
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#else
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[]
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#endif
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}
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var selectedSubtitleTrackID: Int32 {
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#if canImport(MobileVLCKit)
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mediaPlayer.currentVideoSubTitleIndex
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#else
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-1
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#endif
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}
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var subtitleDelay: TimeInterval {
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#if canImport(MobileVLCKit)
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TimeInterval(mediaPlayer.currentVideoSubTitleDelay) / 1_000_000
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#else
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0
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#endif
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}
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#if canImport(MobileVLCKit)
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private func attachSubtitles(_ candidates: [SubtitleCandidate]) -> Int {
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var attachedCount = 0
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var duplicateCount = 0
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candidates.forEach { candidate in
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guard !attachedSubtitleURLs.contains(candidate.url) else {
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duplicateCount += 1
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return
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}
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attachedSubtitleURLs.insert(candidate.url)
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mediaPlayer.addPlaybackSlave(candidate.url, type: .subtitle, enforce: false)
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attachedCount += 1
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#if DEBUG
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print("[DreamioVLC] addPlaybackSlave subtitle=\(URLRedactor.redactedURLString(candidate.url.absoluteString)) label=\(candidate.label) language=\(candidate.language ?? "unknown") ext=\(candidate.url.pathExtension.lowercased())")
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logSubtitleTracks(reason: "after-addPlaybackSlave")
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#endif
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}
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#if DEBUG
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if !candidates.isEmpty {
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print("[DreamioVLC] subtitle candidates=\(candidates.count) attached=\(attachedCount) duplicates=\(duplicateCount)")
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}
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#endif
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guard attachedCount > 0 else {
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return attachedCount
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}
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DispatchQueue.main.asyncAfter(deadline: .now() + 1) { [weak self] in
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self?.selectInitialSubtitleTrackIfNeeded(reason: "delayed-refresh")
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#if DEBUG
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self?.logSubtitleTracks(reason: "delayed-refresh")
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#endif
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self?.onSubtitleTracksChange?()
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}
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return attachedCount
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}
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#if DEBUG
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private func logSubtitleTracks(reason: String) {
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let names = mediaPlayer.videoSubTitlesNames as? [String] ?? []
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let indexes = mediaPlayer.videoSubTitlesIndexes as? [NSNumber] ?? []
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print("[DreamioVLC] subtitle tracks reason=\(reason) names=\(names) indexes=\(indexes.map { $0.int32Value }) selected=\(mediaPlayer.currentVideoSubTitleIndex)")
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}
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#endif
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private func selectInitialSubtitleTrackIfNeeded(reason: String) {
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guard !didUserSelectSubtitleTrack,
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!didAutoSelectSubtitleTrack,
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mediaPlayer.currentVideoSubTitleIndex < 0,
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let track = subtitleTracks.first(where: { $0.id >= 0 }) else {
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return
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}
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didAutoSelectSubtitleTrack = true
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autoSelectedSubtitleTrackID = track.id
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#if DEBUG
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print("[DreamioVLC] auto-select subtitle id=\(track.id) name=\(track.name) reason=\(reason)")
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#endif
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mediaPlayer.currentVideoSubTitleIndex = track.id
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scheduleAutoSubtitleSelectionReapply(trackID: track.id)
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}
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private func scheduleAutoSubtitleSelectionReapply(trackID: Int32) {
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[0.3, 1.0, 2.0, 4.0].forEach { delay in
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DispatchQueue.main.asyncAfter(deadline: .now() + delay) { [weak self] in
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self?.reapplyAutoSelectedSubtitleTrackIfNeeded(
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reason: "delayed-\(String(format: "%.1f", delay))",
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shouldLogNoop: true
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)
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}
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}
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}
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private func reapplyAutoSelectedSubtitleTrackIfNeeded(reason: String, shouldLogNoop: Bool = false) {
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guard !didUserSelectSubtitleTrack,
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let trackID = autoSelectedSubtitleTrackID,
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subtitleTracks.contains(where: { $0.id == trackID }) else {
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return
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}
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let selectedTrackID = mediaPlayer.currentVideoSubTitleIndex
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guard selectedTrackID != trackID || shouldLogNoop else {
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return
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}
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mediaPlayer.currentVideoSubTitleIndex = trackID
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#if DEBUG
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let action = selectedTrackID == trackID ? "confirm" : "recover"
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print("[DreamioVLC] reapply subtitle id=\(trackID) reason=\(reason) action=\(action) selected=\(mediaPlayer.currentVideoSubTitleIndex)")
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#endif
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}
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#endif
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}
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#if canImport(MobileVLCKit)
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extension VLCNativePlaybackBackend: VLCMediaPlayerDelegate {
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func mediaPlayerStateChanged(_ aNotification: Notification) {
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#if DEBUG
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print("[DreamioVLC] state=\(stateName(mediaPlayer.state))")
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#endif
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switch mediaPlayer.state {
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case .buffering, .playing:
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reapplyAutoSelectedSubtitleTrackIfNeeded(reason: stateName(mediaPlayer.state))
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onReady?()
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onStateChange?()
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case .error:
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onFailure?(NativePlaybackError.playbackFailed)
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case .paused, .stopped, .ended:
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onStateChange?()
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case .esAdded:
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selectInitialSubtitleTrackIfNeeded(reason: "esAdded")
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#if DEBUG
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logSubtitleTracks(reason: "esAdded")
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#endif
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onSubtitleTracksChange?()
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default:
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break
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}
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}
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private func stateName(_ state: VLCMediaPlayerState) -> String {
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switch state {
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case .opening:
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return "opening"
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case .buffering:
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return "buffering"
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case .playing:
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return "playing"
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case .ended:
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return "ended"
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case .stopped:
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return "stopped"
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case .error:
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return "error"
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case .paused:
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return "paused"
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case .esAdded:
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return "elementary-stream-added"
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@unknown default:
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return "unknown"
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}
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}
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}
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#endif
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