Model live application audio streams

2026-08-18 15:00:18 -04:00
parent e5a2a430e0
commit 9aea519e54
3 changed files with 272 additions and 0 deletions
@@ -0,0 +1,72 @@
+function property(node, key) {
+    const value = node && node.properties ? node.properties[key] : "";
+    return typeof value === "string" ? value.trim() : "";
+}
+
+function groupKey(node) {
+    return property(node, "application.id")
+        || property(node, "application.process.binary")
+        || property(node, "application.name")
+        || `node:${node.id}`;
+}
+
+function label(node) {
+    return property(node, "application.name")
+        || String(node.description || "").trim()
+        || property(node, "media.name")
+        || "Unknown application";
+}
+
+function icon(node) {
+    return property(node, "application.icon_name")
+        || "audio-x-generic-symbolic";
+}
+
+function group(nodes, audioOutStreamFlag) {
+    const groups = [];
+    const byKey = {};
+    for (const node of nodes || []) {
+        if (!node || node.ready !== true || !node.audio
+                || (node.type & audioOutStreamFlag) !== audioOutStreamFlag)
+            continue;
+        const key = groupKey(node);
+        if (!byKey[key]) {
+            byKey[key] = { key, label: label(node), icon: icon(node), nodes: [] };
+            groups.push(byKey[key]);
+        }
+        byKey[key].nodes.push(node);
+    }
+    return groups;
+}
+
+function audioNodes(application) {
+    return (application && application.nodes || []).filter(node => node && node.audio);
+}
+
+function volume(application) {
+    const nodes = audioNodes(application);
+    return nodes.length === 0 ? 0
+        : nodes.reduce((sum, node) => sum + node.audio.volume, 0) / nodes.length;
+}
+
+function muted(application) {
+    const nodes = audioNodes(application);
+    return nodes.length > 0 && nodes.every(node => node.audio.muted === true);
+}
+
+function setVolume(application, value) {
+    const next = Math.max(0, Math.min(1, Number(value)));
+    if (!Number.isFinite(next)) return false;
+    const nodes = audioNodes(application);
+    for (const node of nodes) {
+        node.audio.muted = false;
+        node.audio.volume = next;
+    }
+    return nodes.length > 0;
+}
+
+function setMuted(application, mutedValue) {
+    const nodes = audioNodes(application);
+    for (const node of nodes) node.audio.muted = mutedValue === true;
+    return nodes.length > 0;
+}