rewrite bar with quickshell

quickshell/Modules/Misc/Cava.qml

@@ -0,0 +1,81 @@
+import QtQuick
+import Quickshell
+import Quickshell.Io
+import qs.Services
+
+Scope {
+    id: root
+
+    property int count: 32
+    property int noiseReduction: 60
+    property string channels: "mono"
+    property string monoOption: "average"
+    property var config: ({
+        "general": {
+            "bars": count,
+            "framerate": 30,
+            "autosens": 1
+        },
+        "smoothing": {
+            "monstercat": 1,
+            "gravity": 1e+06,
+            "noise_reduction": noiseReduction
+        },
+        "output": {
+            "method": "raw",
+            "bit_format": 8,
+            "channels": channels,
+            "mono_option": monoOption
+        }
+    })
+    property var values: Array(count).fill(0)
+
+    Process {
+        id: process
+
+        property int index: 0
+
+        stdinEnabled: true
+        running: !MusicManager.isAllPaused()
+        command: ["cava", "-p", "/dev/stdin"]
+        onExited: {
+            stdinEnabled = true;
+            index = 0;
+            values = Array(count).fill(0);
+        }
+        onStarted: {
+            for (const k in config) {
+                if (typeof config[k] !== "object") {
+                    write(k + "=" + config[k] + "\n");
+                    continue;
+                }
+                write("[" + k + "]\n");
+                const obj = config[k];
+                for (const k2 in obj) {
+                    write(k2 + "=" + obj[k2] + "\n");
+                }
+            }
+            stdinEnabled = false;
+        }
+
+        stdout: SplitParser {
+            splitMarker: ""
+            onRead: (data) => {
+                const newValues = Array(count).fill(0);
+                for (let i = 0; i < values.length; i++) {
+                    newValues[i] = values[i];
+                }
+                if (process.index + data.length > count)
+                    process.index = 0;
+
+                for (let i = 0; i < data.length; i += 1) {
+                    newValues[i + process.index] = Math.min(data.charCodeAt(i), 128) / 128;
+                }
+                process.index += data.length;
+                values = newValues;
+            }
+        }
+
+    }
+
+}