From e609e90165e23768f55462d40cda09a31e3f0cd9 Mon Sep 17 00:00:00 2001
From: Arkadiusz Fal <arek@arekf.net>
Date: Sat, 13 Aug 2022 16:11:07 +0200
Subject: [PATCH] Improve AVPlayer performance

Fix updating aspect ratio

Fix #170
---
 Model/Player/Backends/AVPlayerBackend.swift | 33 +++++++++++++++------
 Model/Player/Backends/MPVBackend.swift      |  2 +-
 Model/Player/Backends/PlayerBackend.swift   |  6 ----
 Model/Player/PlayerModel.swift              | 10 +++++++
 4 files changed, 35 insertions(+), 16 deletions(-)

diff --git a/Model/Player/Backends/AVPlayerBackend.swift b/Model/Player/Backends/AVPlayerBackend.swift
index 1570d256..cd4e1993 100644
--- a/Model/Player/Backends/AVPlayerBackend.swift
+++ b/Model/Player/Backends/AVPlayerBackend.swift
@@ -70,6 +70,8 @@ final class AVPlayerBackend: PlayerBackend {
 
     private var timeObserverThrottle = Throttle(interval: 2)
 
+    private var controlsUpdates = false
+
     init(model: PlayerModel, controls: PlayerControlsModel?, playerTime: PlayerTimeModel?) {
         self.model = model
         self.controls = controls
@@ -314,8 +316,6 @@ final class AVPlayerBackend: PlayerBackend {
                     return
                 }
 
-                self.updatePlayerAspectRatio()
-
                 if !preservingTime,
                    let segment = self.model.sponsorBlock.segments.first,
                    segment.start < 3,
@@ -454,7 +454,9 @@ final class AVPlayerBackend: PlayerBackend {
 
             switch playerItem.status {
             case .readyToPlay:
-                if self.isAutoplaying(playerItem) {
+                if self.model.activeBackend == .appleAVPlayer,
+                   self.isAutoplaying(playerItem) {
+                    self.model.updateAspectRatio()
                     self.model.play()
                 }
             case .failed:
@@ -506,8 +508,10 @@ final class AVPlayerBackend: PlayerBackend {
                 return
             }
 
-            self.playerTime.duration = self.playerItemDuration ?? .zero
-            self.playerTime.currentTime = self.currentTime ?? .zero
+            if self.controlsUpdates {
+                self.playerTime.duration = self.playerItemDuration ?? .zero
+                self.playerTime.currentTime = self.currentTime ?? .zero
+            }
 
             #if !os(tvOS)
                 self.model.updateNowPlayingInfo()
@@ -548,8 +552,12 @@ final class AVPlayerBackend: PlayerBackend {
                 return
             }
 
-            DispatchQueue.main.async {
-                self.controls.isPlaying = player.timeControlStatus == .playing
+            let isPlaying = player.timeControlStatus == .playing
+
+            if self.controls.isPlaying != isPlaying {
+                DispatchQueue.main.async {
+                    self.controls.isPlaying = player.timeControlStatus == .playing
+                }
             }
 
             if player.timeControlStatus != .waitingToPlayAtSpecifiedRate {
@@ -590,8 +598,15 @@ final class AVPlayerBackend: PlayerBackend {
     }
 
     func updateControls() {}
-    func startControlsUpdates() {}
-    func stopControlsUpdates() {}
+
+    func startControlsUpdates() {
+        controlsUpdates = true
+    }
+
+    func stopControlsUpdates() {
+        controlsUpdates = false
+    }
+
     func setNeedsDrawing(_: Bool) {}
     func setSize(_: Double, _: Double) {}
     func setNeedsNetworkStateUpdates(_: Bool) {}
diff --git a/Model/Player/Backends/MPVBackend.swift b/Model/Player/Backends/MPVBackend.swift
index e605c1cf..57fad010 100644
--- a/Model/Player/Backends/MPVBackend.swift
+++ b/Model/Player/Backends/MPVBackend.swift
@@ -45,7 +45,7 @@ final class MPVBackend: PlayerBackend {
         networkStateTimer.start()
 
         if isPlaying {
-            self.updatePlayerAspectRatio()
+            self.model.updateAspectRatio()
             startClientUpdates()
         } else {
             stopControlsUpdates()
diff --git a/Model/Player/Backends/PlayerBackend.swift b/Model/Player/Backends/PlayerBackend.swift
index 37747b9d..ae8f17d0 100644
--- a/Model/Player/Backends/PlayerBackend.swift
+++ b/Model/Player/Backends/PlayerBackend.swift
@@ -95,10 +95,4 @@ extension PlayerBackend {
             model.advanceToItem(item)
         }
     }
-
-    func updatePlayerAspectRatio() {
-        DispatchQueue.main.async {
-            self.model.aspectRatio = aspectRatio
-        }
-    }
 }
diff --git a/Model/Player/PlayerModel.swift b/Model/Player/PlayerModel.swift
index 4a195f44..f412b3ff 100644
--- a/Model/Player/PlayerModel.swift
+++ b/Model/Player/PlayerModel.swift
@@ -871,4 +871,14 @@ final class PlayerModel: ObservableObject {
 
         mpvBackend.setVideoToAuto()
     }
+
+
+    func updateAspectRatio() {
+        guard aspectRatio != backend.aspectRatio else { return }
+
+        DispatchQueue.main.async { [weak self] in
+            guard let self = self else { return }
+            self.aspectRatio = self.backend.aspectRatio
+        }
+    }
 }