cava: optimize CPU burn

related #631

quickshell/Modules/DankBar/Widgets/AudioVisualization.qml

@@ -8,7 +8,7 @@ Item {
 
     readonly property MprisPlayer activePlayer: MprisController.activePlayer
     readonly property bool isPlaying: activePlayer !== null && activePlayer.playbackState === MprisPlaybackState.Playing
-    readonly property bool live: visible && isPlaying
+    readonly property bool live: visible && (Window.window?.visible ?? false) && isPlaying
 
     width: 20
     height: Theme.iconSize

quickshell/Modules/Lock/LockScreenContent.qml

@@ -1477,12 +1477,16 @@ Item {
                 anchors.verticalCenter: parent.verticalCenter
 
                 Item {
+                    id: lockVisualizer
+
                     width: 20
                     height: Theme.iconSize
                     anchors.verticalCenter: parent.verticalCenter
 
+                    readonly property bool live: visible && (Window.window?.visible ?? false) && MprisController.activePlayer?.playbackState === MprisPlaybackState.Playing
+
                     Loader {
-                        active: MprisController.activePlayer?.playbackState === MprisPlaybackState.Playing
+                        active: lockVisualizer.live
 
                         sourceComponent: Component {
                             Ref {
@@ -1492,7 +1496,7 @@ Item {
                     }
 
                     Timer {
-                        running: !CavaService.cavaAvailable && MprisController.activePlayer?.playbackState === MprisPlaybackState.Playing
+                        running: !CavaService.cavaAvailable && lockVisualizer.live
                         interval: 256
                         repeat: true
                         onTriggered: {

quickshell/Services/CavaService.qml

@@ -39,6 +39,7 @@ framerate=25
 bars=6
 autosens=0
 sensitivity=30
+sleep_timer=3
 lower_cutoff_freq=50
 higher_cutoff_freq=12000
 
@@ -67,13 +68,18 @@ exec cava -p ${root._confPath} < /dev/null`]
         stdout: SplitParser {
             splitMarker: "\n"
             onRead: data => {
-                if (root.refCount > 0 && data.length > 0) {
+                if (root.refCount <= 0 || data.length === 0)
-                    const parts = data.split(";");
+                    return;
-                    if (parts.length >= 6) {
+
-                        const points = [parseInt(parts[0], 10), parseInt(parts[1], 10), parseInt(parts[2], 10), parseInt(parts[3], 10), parseInt(parts[4], 10), parseInt(parts[5], 10)];
+                const parts = data.split(";");
-                        root.values = points;
+                if (parts.length < 6)
-                    }
+                    return;
-                }
+
+                const points = [parseInt(parts[0], 10), parseInt(parts[1], 10), parseInt(parts[2], 10), parseInt(parts[3], 10), parseInt(parts[4], 10), parseInt(parts[5], 10)];
+                if (points.every((v, i) => v === root.values[i]))
+                    return;
+
+                root.values = points;
             }
         }
     }

quickshell/Widgets/DankAlbumArt.qml

@@ -45,7 +45,8 @@ Item {
     readonly property real blobMorphBoost: 1.7
     readonly property real blobSpinSpeed: 0.03
 
-    readonly property bool blobActive: CavaService.cavaAvailable && activePlayer?.playbackState === MprisPlaybackState.Playing && showAnimation && albumArtStatus === Image.Ready
+    readonly property bool onScreen: visible && (Window.window?.visible ?? false)
+    readonly property bool blobActive: CavaService.cavaAvailable && onScreen && activePlayer?.playbackState === MprisPlaybackState.Playing && showAnimation && albumArtStatus === Image.Ready
     property var smoothedBands: [0, 0, 0, 0, 0, 0]
     property var slowBands: [0, 0, 0, 0, 0, 0]
     property var bandTargets: [0, 0, 0, 0, 0, 0]
@@ -165,7 +166,7 @@ Item {
     }
 
     Loader {
-        active: activePlayer?.playbackState === MprisPlaybackState.Playing && showAnimation
+        active: root.onScreen && activePlayer?.playbackState === MprisPlaybackState.Playing && showAnimation
         sourceComponent: Component {
             Ref {
                 service: CavaService
@@ -183,7 +184,14 @@ Item {
 
     FrameAnimation {
         running: blobEffect.visible
-        onTriggered: root.stepBlob(Math.min(frameTime, 0.05))
+        property real pending: 0
+        onTriggered: {
+            pending += frameTime;
+            if (pending < 0.03)
+                return;
+            root.stepBlob(Math.min(pending, 0.05));
+            pending = 0;
+        }
     }
 
     ShaderEffect {