Improve performance and add statistics for MPV

Shared/Defaults.swift

@@ -82,15 +82,13 @@ extension Defaults.Keys {
 
     static let visibleSections = Key<Set<VisibleSection>>("visibleSections", default: [.favorites, .subscriptions, .trending, .playlists])
 
-    #if os(macOS)
-        static let enableBetaChannel = Key<Bool>("enableBetaChannel", default: false)
-    #endif
-
     #if os(iOS)
         static let honorSystemOrientationLock = Key<Bool>("honorSystemOrientationLock", default: true)
         static let enterFullscreenInLandscape = Key<Bool>("enterFullscreenInLandscape", default: UIDevice.current.userInterfaceIdiom == .phone)
         static let lockOrientationInFullScreen = Key<Bool>("lockOrientationInFullScreen", default: false)
     #endif
+
+    static let showMPVPlaybackStats = Key<Bool>("showMPVPlaybackStats", default: false)
 }
 
 enum ResolutionSetting: String, CaseIterable, Defaults.Serializable {

Shared/Player/Controls/PlayerControls.swift

@@ -1,3 +1,4 @@
+import Defaults
 import Foundation
 import SDWebImageSwiftUI
 import SwiftUI
@@ -22,6 +23,8 @@ struct PlayerControls: View {
         @FocusState private var focusedField: Field?
     #endif
 
+    @Default(.showMPVPlaybackStats) private var showMPVPlaybackStats
+
     init(player: PlayerModel, thumbnails: ThumbnailsModel) {
         self.player = player
         self.thumbnails = thumbnails
@@ -49,6 +52,10 @@ struct PlayerControls: View {
                     Spacer()
 
                     Group {
+                        if player.activeBackend == .mpv, showMPVPlaybackStats {
+                            mpvPlaybackStats
+                        }
+
                         timeline
                             .offset(y: 10)
                             .zIndex(1)
@@ -103,6 +110,30 @@ struct PlayerControls: View {
         }
     }
 
+    var mpvPlaybackStats: some View {
+        HStack {
+            Group {
+                Text("hw decoder: \(player.mpvBackend.hwDecoder)")
+                Text("dropped: \(player.mpvBackend.frameDropCount)")
+                Text("output fps: \(player.mpvBackend.outputFps)")
+            }
+            .padding(4)
+            #if os(macOS)
+                .background(VisualEffectBlur(material: .hudWindow))
+            #elseif os(iOS)
+                .background(VisualEffectBlur(blurStyle: .systemThinMaterial))
+            #else
+                .background(.thinMaterial)
+            #endif
+                .mask(RoundedRectangle(cornerRadius: 3))
+
+            Spacer()
+        }
+        #if !os(tvOS)
+        .font(.system(size: 9))
+        #endif
+    }
+
     var timeline: some View {
         TimelineView(duration: durationBinding, current: currentTimeBinding, cornerRadius: 0)
     }
@@ -164,14 +195,11 @@ struct PlayerControls: View {
     var buttonsBar: some View {
         HStack {
             #if !os(tvOS)
-                #if os(iOS)
-                    hidePlayerButton
-                #endif
-
                 fullscreenButton
 
                 #if os(iOS)
                     pipButton
+                        .padding(.leading, 5)
                 #endif
 
                 Spacer()
@@ -257,8 +285,7 @@ struct PlayerControls: View {
     }
 
     private var backendButton: some View {
-        let label = "\(player.activeBackend.label)\(player.activeBackend == .mpv ? " - \(player.mpvBackend.frameDropCount)" : "")"
-        return button(label, width: 120) {
+        button(player.activeBackend.label, width: 100) {
             player.saveTime {
                 player.changeActiveBackend(from: player.activeBackend, to: player.activeBackend.next())
                 model.resetTimer()

Shared/Settings/PlayerSettings.swift

@@ -28,6 +28,8 @@ struct PlayerSettings: View {
 
     @Default(.enableReturnYouTubeDislike) private var enableReturnYouTubeDislike
 
+    @Default(.showMPVPlaybackStats) private var showMPVPlaybackStats
+
     #if os(iOS)
         private var idiom: UIUserInterfaceIdiom {
             UIDevice.current.userInterfaceIdiom
@@ -103,6 +105,10 @@ struct PlayerSettings: View {
                     lockOrientationInFullScreenToggle
                 }
             #endif
+
+            Section(header: SettingsHeader(text: "Debugging")) {
+                showMPVPlaybackStatsToggle
+            }
         }
     }
 
@@ -232,11 +238,17 @@ struct PlayerSettings: View {
             Toggle("Close PiP and open player when application enters foreground", isOn: $closePiPAndOpenPlayerOnEnteringForeground)
         }
     #endif
+
+    private var showMPVPlaybackStatsToggle: some View {
+        Toggle("Show MPV playback statistics", isOn: $showMPVPlaybackStats)
+    }
 }
 
 struct PlaybackSettings_Previews: PreviewProvider {
     static var previews: some View {
-        PlayerSettings()
-            .injectFixtureEnvironmentObjects()
+        VStack(alignment: .leading) {
+            PlayerSettings()
+        }
+        .injectFixtureEnvironmentObjects()
     }
 }

Shared/Settings/SettingsView.swift

@@ -171,7 +171,7 @@ struct SettingsView: View {
             case .browsing:
                 return 350
             case .player:
-                return 450
+                return 500
             case .history:
                 return 480
             case .sponsorBlock: