From e91c7fb2d531d845d96e0811dc01040211389cb9 Mon Sep 17 00:00:00 2001
From: Arkadiusz Fal <arek@arekf.net>
Date: Thu, 16 Jun 2022 02:03:15 +0200
Subject: [PATCH] Improve MPV performance

---
 Model/Player/Backends/MPVBackend.swift | 16 +++++++---
 Model/Player/Backends/MPVClient.swift  |  4 +--
 Shared/Player/MPV/MPVOGLView.swift     | 42 ++++++++++++--------------
 Shared/Player/VideoPlayerView.swift    |  1 -
 4 files changed, 33 insertions(+), 30 deletions(-)

diff --git a/Model/Player/Backends/MPVBackend.swift b/Model/Player/Backends/MPVBackend.swift
index 154311d6..ee6131d9 100644
--- a/Model/Player/Backends/MPVBackend.swift
+++ b/Model/Player/Backends/MPVBackend.swift
@@ -273,9 +273,17 @@ final class MPVBackend: PlayerBackend {
 
     func updateControls() {
         DispatchQueue.main.async { [weak self] in
-            self?.logger.info("updating controls")
-            self?.controls.currentTime = self?.currentTime ?? .zero
-            self?.controls.duration = self?.playerItemDuration ?? .zero
+            guard let self = self else {
+                return
+            }
+
+            guard self.controls.player.presentingPlayer else {
+                return
+            }
+
+            self.logger.info("updating controls")
+            self.controls.currentTime = self.currentTime ?? .zero
+            self.controls.duration = self.playerItemDuration ?? .zero
         }
     }
 
@@ -296,8 +304,6 @@ final class MPVBackend: PlayerBackend {
     private var handleSegmentsThrottle = Throttle(interval: 1)
 
     private func getClientUpdates() {
-        self.logger.info("getting client updates")
-
         currentTime = client?.currentTime
         playerItemDuration = client?.duration
 
diff --git a/Model/Player/Backends/MPVClient.swift b/Model/Player/Backends/MPVClient.swift
index 2176182f..c350907f 100644
--- a/Model/Player/Backends/MPVClient.swift
+++ b/Model/Player/Backends/MPVClient.swift
@@ -324,8 +324,8 @@ final class MPVClient: ObservableObject {
             return
         }
 
-        DispatchQueue.main.async {
-            glView.setNeedsDisplay()
+        glView.queue.async {
+            glView.display()
         }
     }
 
diff --git a/Shared/Player/MPV/MPVOGLView.swift b/Shared/Player/MPV/MPVOGLView.swift
index f466e548..fccdd422 100644
--- a/Shared/Player/MPV/MPVOGLView.swift
+++ b/Shared/Player/MPV/MPVOGLView.swift
@@ -7,6 +7,7 @@ final class MPVOGLView: GLKView {
     private var defaultFBO: GLint?
 
     var mpvGL: UnsafeMutableRawPointer?
+    var queue = DispatchQueue(label: "stream.yattee.opengl", qos: .userInteractive)
     var needsDrawing = true
 
     override init(frame: CGRect) {
@@ -18,14 +19,9 @@ final class MPVOGLView: GLKView {
         logger.info("frame size: \(frame.width) x \(frame.height)")
 
         super.init(frame: frame, context: context)
-        contentMode = .redraw
 
         EAGLContext.setCurrent(context)
 
-        drawableColorFormat = .RGBA8888
-        drawableDepthFormat = .formatNone
-        drawableStencilFormat = .formatNone
-
         defaultFBO = -1
         isOpaque = false
 
@@ -38,28 +34,30 @@ final class MPVOGLView: GLKView {
     }
 
     override func draw(_: CGRect) {
+        guard needsDrawing, let mpvGL = mpvGL else {
+            return
+        }
+
         glGetIntegerv(UInt32(GL_FRAMEBUFFER_BINDING), &defaultFBO!)
 
         var dims: [GLint] = [0, 0, 0, 0]
         glGetIntegerv(GLenum(GL_VIEWPORT), &dims)
 
-        if mpvGL != nil {
-            var data = mpv_opengl_fbo(
-                fbo: Int32(defaultFBO!),
-                w: Int32(dims[2]),
-                h: Int32(dims[3]),
-                internal_format: 0
-            )
-            var flip: CInt = 1
-            withUnsafeMutablePointer(to: &flip) { flip in
-                withUnsafeMutablePointer(to: &data) { data in
-                    var params = [
-                        mpv_render_param(type: MPV_RENDER_PARAM_OPENGL_FBO, data: data),
-                        mpv_render_param(type: MPV_RENDER_PARAM_FLIP_Y, data: flip),
-                        mpv_render_param()
-                    ]
-                    mpv_render_context_render(OpaquePointer(mpvGL), &params)
-                }
+        var data = mpv_opengl_fbo(
+            fbo: Int32(defaultFBO!),
+            w: Int32(dims[2]),
+            h: Int32(dims[3]),
+            internal_format: 0
+        )
+        var flip: CInt = 1
+        withUnsafeMutablePointer(to: &flip) { flip in
+            withUnsafeMutablePointer(to: &data) { data in
+                var params = [
+                    mpv_render_param(type: MPV_RENDER_PARAM_OPENGL_FBO, data: data),
+                    mpv_render_param(type: MPV_RENDER_PARAM_FLIP_Y, data: flip),
+                    mpv_render_param()
+                ]
+                mpv_render_context_render(OpaquePointer(mpvGL), &params)
             }
         }
     }
diff --git a/Shared/Player/VideoPlayerView.swift b/Shared/Player/VideoPlayerView.swift
index 0ecc1f59..89f99158 100644
--- a/Shared/Player/VideoPlayerView.swift
+++ b/Shared/Player/VideoPlayerView.swift
@@ -156,7 +156,6 @@ struct VideoPlayerView: View {
                                         return // swiftlint:disable:this implicit_return
                                     }
 
-                                    player.backend.setNeedsDrawing(false)
                                     let drag = value.translation.height
 
                                     guard drag > 0 else {