From 67664d698407652ced1cb48548d623ed3fb771e0 Mon Sep 17 00:00:00 2001
From: Amateur Audio Dude <168192910+AmateurAudioDude@users.noreply.github.com>
Date: Mon, 21 Apr 2025 21:23:03 +1000
Subject: [PATCH] fix android audio stutter running in background

---
 web/js/main.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/web/js/main.js b/web/js/main.js
index db5b5ec..7612c10 100644
--- a/web/js/main.js
+++ b/web/js/main.js
@@ -461,6 +461,7 @@ function initCanvas() {
                         delay: 150,
                         onRefresh: (chart) => {
                             if (!chart?.data?.datasets || parsedData?.sig === undefined) return;
+                            if ((isAndroid || isIOS || isIPadOS) && (document.hidden || !document.hasFocus())) return;
 
                             signalBuffer.push(parsedData.sig);
                             if (signalBuffer.length > 8) {
@@ -573,6 +574,21 @@ function initCanvas() {
     });
 }
 
+function setRefreshRate(rate) {
+    const rt = signalChart.options.scales.x.realtime;
+    rt.refresh = rate;
+    signalChart.update('none');
+    console.log(`Graph refresh rate set to ${rate} ms`);
+}
+
+window.addEventListener("focus", () => {
+    if (isAndroid || isIOS || isIPadOS) setRefreshRate(75);
+});
+
+window.addEventListener("blur", () => {
+    if (isAndroid || isIOS || isIPadOS) setRefreshRate(3000);
+});
+
 let reconnectTimer = null;
 let dataTimeout = null;
 let dataTimeoutPrevious = null;