From 67777ef1cd5d5b88d909075a6b6032947f8df16e Mon Sep 17 00:00:00 2001
From: Christoph Reiter <reiter.christoph@gmail.com>
Date: Wed, 21 Oct 2020 12:07:23 +0200
Subject: [PATCH] Reduce scan count to three times a second
---
packages/qr-code-scanner/src/qr-code-scanner.js | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/packages/qr-code-scanner/src/qr-code-scanner.js b/packages/qr-code-scanner/src/qr-code-scanner.js
index e58f4a8e..28b9d15f 100644
--- a/packages/qr-code-scanner/src/qr-code-scanner.js
+++ b/packages/qr-code-scanner/src/qr-code-scanner.js
@@ -210,7 +210,7 @@ export class QrCodeScanner extends ScopedElementsMixin(DBPLitElement) {
}
const that = this;
- let lastVideoTime = -1;
+ let lastVideoScanTime = -1;
let lastCode = null;
let lastSentData = null;
@@ -307,9 +307,9 @@ export class QrCodeScanner extends ScopedElementsMixin(DBPLitElement) {
let code = null;
// We only check for QR codes 5 times a second to improve performance
- let shouldAnalyze = Math.abs(lastVideoTime - video.currentTime) >= 1/5;
+ let shouldAnalyze = Math.abs(lastVideoScanTime - video.currentTime) >= 1/3;
if (shouldAnalyze) {
- lastVideoTime = video.currentTime;
+ lastVideoScanTime = video.currentTime;
code = jsQR(imageData.data, imageData.width, imageData.height, {
inversionAttempts: "dontInvert",
});
--
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