From 00fd2d6d85469a899305c4807f6a46940293ca59 Mon Sep 17 00:00:00 2001
From: Jonathan Kingston <jkingston@duckduckgo.com>
Date: Sun, 28 Mar 2021 11:36:41 +0100
Subject: [PATCH] Add in expensive audio fingerprint lookup

---
 .../fingerprinting/helpers/tests.js           | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/privacy-protections/fingerprinting/helpers/tests.js b/privacy-protections/fingerprinting/helpers/tests.js
index 7a7144c..70f5786 100644
--- a/privacy-protections/fingerprinting/helpers/tests.js
+++ b/privacy-protections/fingerprinting/helpers/tests.js
@@ -1005,6 +1005,25 @@ const tests = [
             return fingerprint;
         }
     },
+    {
+        id: 'audio',
+        category: 'full-fingerprint-expensive',
+        getValue: async () => {
+            // eslint-disable-next-line new-cap
+            const context = window.OfflineAudioContext ? new OfflineAudioContext(1, 44100, 44100) : new webkitOfflineAudioContext(1, 44100, 44100);
+            const renderedBuffer = await applyFpExampleDataToAudio(context);
+
+            const vals = [];
+            for (var i = 0; i < renderedBuffer.length; i++) {
+                vals.push(renderedBuffer.getChannelData(0)[i].toString());
+            }
+
+            const fingerprint = vals
+                .reduce(function (acc, val) { return acc + Math.abs(val); }, 0)
+                .toString();
+            return fingerprint;
+        }
+    },
     {
         id: 'audio-copyFromChannel',
         category: 'full-fingerprints',