earbang protection

.config/quickshell/services/Audio.qml

@@ -1,3 +1,4 @@
+import "root:/modules/common"
 import QtQuick
 import Quickshell
 import Quickshell.Services.Pipewire
@@ -11,11 +12,43 @@ Singleton {
     id: root
 
     property bool ready: Pipewire.defaultAudioSink?.ready ?? false
-    property var sink: Pipewire.defaultAudioSink
-    property var source: Pipewire.defaultAudioSource
+    property PwNode sink: Pipewire.defaultAudioSink
+    property PwNode source: Pipewire.defaultAudioSource
+
+    signal sinkProtectionTriggered(string reason);
 
     PwObjectTracker {
         objects: [sink, source]
+        Component.onCompleted: {
+            sink.audio.volume = sink.audio.volume; // Trigger initial volume change
+        }
+    }
+
+    Connections { // Protection against sudden volume changes
+        target: sink?.audio ?? null
+        property bool lastReady: false
+        property real lastVolume: 0
+        function onVolumeChanged() {
+            if (!ConfigOptions.audio.protection.enable) return;
+            if (!lastReady) {
+                lastVolume = sink.audio.volume;
+                lastReady = true;
+                return;
+            }
+            const newVolume = sink.audio.volume;
+            const maxAllowedIncrease = ConfigOptions.audio.protection.maxAllowedIncrease / 100; 
+            const maxAllowed = ConfigOptions.audio.protection.maxAllowed / 100;
+
+            if (newVolume - lastVolume > maxAllowedIncrease) {
+                sink.audio.volume = lastVolume;
+                root.sinkProtectionTriggered("Illegal increment");
+            } else if (newVolume > maxAllowed) {
+                sink.audio.volume = lastVolume;
+                root.sinkProtectionTriggered("Exceeded max allowed");
+            }
+            lastVolume = sink.audio.volume;
+        }
+        
     }
 
 }