Add initial version of music mode

Model/Player/Backends/MPVBackend.swift

@@ -62,6 +62,10 @@ final class MPVBackend: PlayerBackend {
     private var controlsUpdates = false
     private var timeObserverThrottle = Throttle(interval: 2)
 
+    var tracks: Int {
+        client?.tracksCount ?? -1
+    }
+
     init(model: PlayerModel, controls: PlayerControlsModel? = nil) {
         self.model = model
         self.controls = controls

Model/Player/PiPDelegate.swift

@@ -50,7 +50,7 @@ final class PiPDelegate: NSObject, AVPictureInPictureControllerDelegate {
             }
         #endif
 
-        if !player.currentItem.isNil {
+        if !player.currentItem.isNil, !player.musicMode {
             player?.show()
         }
 

Model/Player/PlayerControlsModel.swift

@@ -68,9 +68,15 @@ final class PlayerControlsModel: ObservableObject {
     }
 
     func hide() {
-        player?.backend.stopControlsUpdates()
+        guard let player = player,
+              !player.musicMode
+        else {
+            return
+        }
 
-        guard !(player?.currentItem.isNil ?? true) else {
+        player.backend.stopControlsUpdates()
+
+        guard !player.currentItem.isNil else {
             return
         }
 
@@ -83,9 +89,7 @@ final class PlayerControlsModel: ObservableObject {
     }
 
     func toggle() {
-        withAnimation(PlayerControls.animation) {
-            presentingControls.toggle()
-        }
+        presentingControls ? hide() : show()
     }
 
     func reset() {
@@ -101,6 +105,11 @@ final class PlayerControlsModel: ObservableObject {
         #endif
 
         removeTimer()
+
+        guard !player.musicMode else {
+            return
+        }
+
         timer = Timer.scheduledTimer(withTimeInterval: 5.0, repeats: false) { _ in
             withAnimation(PlayerControls.animation) { [weak self] in
                 self?.presentingControls = false

Model/Player/PlayerModel.swift

@@ -62,6 +62,7 @@ final class PlayerModel: ObservableObject {
     @Published var lastSkipped: Segment? { didSet { rebuildTVMenu() } }
     @Published var restoredSegments = [Segment]()
 
+    @Published var musicMode = false
     @Published var returnYouTubeDislike = ReturnYouTubeDislikeAPI()
 
     #if os(iOS)
@@ -114,7 +115,7 @@ final class PlayerModel: ObservableObject {
         self.avPlayerBackend = AVPlayerBackend(model: self, controls: controls)
         self.mpvBackend = MPVBackend(model: self)
 
-        self.activeBackend = Defaults[.activeBackend]
+        Defaults[.activeBackend] = .mpv
     }
 
     func show() {
@@ -361,6 +362,12 @@ final class PlayerModel: ObservableObject {
             return
         }
 
+        if to == .mpv {
+            addVideoTrackFromStream()
+        } else {
+            musicMode = false
+        }
+
         inactiveBackends().forEach { $0.pause() }
 
         let fromBackend: PlayerBackend = from == .appleAVPlayer ? avPlayerBackend : mpvBackend
@@ -561,4 +568,37 @@ final class PlayerModel: ObservableObject {
     func setNeedsDrawing(_ needsDrawing: Bool) {
         backends.forEach { $0.setNeedsDrawing(needsDrawing) }
     }
+
+    func toggleMusicMode() {
+        musicMode.toggle()
+
+        if musicMode {
+            if playingInPictureInPicture {
+                avPlayerBackend.pause()
+                avPlayerBackend.switchToMPVOnPipClose = false
+                closePiP()
+            }
+            changeActiveBackend(from: .appleAVPlayer, to: .mpv)
+            controls.presentingControls = true
+            controls.removeTimer()
+            mpvBackend.setVideoToNo()
+        } else {
+            addVideoTrackFromStream()
+            mpvBackend.setVideoToAuto()
+
+            controls.resetTimer()
+        }
+    }
+
+    func addVideoTrackFromStream() {
+        if let videoTrackURL = stream?.videoAsset?.url,
+           mpvBackend.tracks < 2
+        {
+            logger.info("adding video track")
+
+            mpvBackend.addVideoTrack(videoTrackURL)
+        }
+
+        mpvBackend.setVideoToAuto()
+    }
 }