Add MPV hardware decode option to settings

Adds a "Hardware Decode" ComboBox in MPV settings (Auto/Software),
allowing users to disable hardware decoding as a workaround for
kernel slab memory leaks observed with AMD RDNA 4 GPUs (RX 9070 XT).

Author: RainyPixel

plugin/contents/config/main.xml

@@ -70,6 +70,10 @@
       <label>Mpv Stats</label>
       <default>false</default>
     </entry>
+    <entry name="MpvHwdec" type="String">
+      <label>Mpv Hardware Decode</label>
+      <default>auto</default>
+    </entry>
     <entry name="MouseInput" type="Bool">
       <label>Mouse Input</label>
       <default>true</default>

plugin/contents/ui/backend/Mpv.qml

@@ -65,9 +65,17 @@ Item{
             }
         }
     }
+    Connections {
+        target: background
+        function onMpvHwdecChanged() {
+            player.setProperty("hwdec", background.mpvHwdec);
+        }
+    }
+
     Component.onCompleted:{
         background.nowBackend = 'mpv';
         videoItem.displayModeChanged();
+        player.setProperty("hwdec", background.mpvHwdec);
     }
 
     function play(){

plugin/contents/ui/main.qml

@@ -23,6 +23,7 @@ Rectangle {
     property bool   noRandomWhilePaused: wallpaper.configuration.NoRandomWhilePaused
     property bool   mouseInput: wallpaper.configuration.MouseInput
     property bool   mpvStats: wallpaper.configuration.MpvStats
+    property string mpvHwdec: wallpaper.configuration.MpvHwdec
 
     property bool   pauseOnBatPower: wallpaper.configuration.PauseOnBatPower
     property int    pauseBatPercent: wallpaper.configuration.PauseBatPercent

plugin/contents/ui/page/SettingPage.qml

@@ -20,6 +20,7 @@ Flickable {
     property alias cfg_Fps: sliderFps.value
     property alias cfg_Volume: sliderVol.value
     property alias cfg_MpvStats: ckbox_mpvStats.checked
+    property string cfg_MpvHwdec
     property alias cfg_Speed: spin_speed.dValue
     property alias cfg_MuteAudio: ckbox_muteAudio.checked
     property alias cfg_MouseInput: ckbox_mouseInput.checked
@@ -317,6 +318,30 @@ Flickable {
                     id: ckbox_mpvStats
                 }
             }
+
+            OptionItem {
+                text: 'Hardware Decode'
+                text_color: Kirigami.Theme.textColor
+                icon: '../../images/plugin.svg'
+                visible: cfg_VideoBackend == Common.VideoBackend.Mpv
+                actor: ComboBox {
+                    id: cbox_mpvHwdec
+                    model: [
+                        { text: "Auto",     value: "auto" },
+                        { text: "Software", value: "no"   }
+                    ]
+                    textRole: "text"
+                    onActivated: cfg_MpvHwdec = model[currentIndex].value
+                    Component.onCompleted: {
+                        for (let i = 0; i < model.length; i++) {
+                            if (model[i].value === cfg_MpvHwdec) {
+                                currentIndex = i;
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
         }
         OptionGroup {
             Layout.fillWidth: true