From a4772941a7a69e2f48ed971b8286408610ac6bf8 Mon Sep 17 00:00:00 2001
From: n1073645 <n1073645@gmail.com>
Date: Fri, 8 Nov 2019 14:56:54 +0000
Subject: [PATCH] Added WAV extractor.

---
 src/core/lib/FileSignatures.mjs | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/core/lib/FileSignatures.mjs b/src/core/lib/FileSignatures.mjs
index d4f0ee22..38712717 100644
--- a/src/core/lib/FileSignatures.mjs
+++ b/src/core/lib/FileSignatures.mjs
@@ -736,7 +736,7 @@ export const FILE_SIGNATURES = {
                 10: 0x56,
                 11: 0x45
             },
-            extractor: null
+            extractor: extractWAV
         },
         {
             name: "OGG audio",
@@ -2642,6 +2642,22 @@ export function extractBMP(bytes, offset) {
     return stream.carve();
 }
 
+/**
+ * WAV extractor.
+ *
+ * @param {Uint8Array} bytes
+ * @param {Number} offset
+ * @returns {Uint8Array}
+ */
+export function extractWAV(bytes, offset) {
+    const stream = new Stream(bytes.slice(offset));
+    stream.moveTo(4);
+
+    // Move to file size.
+    stream.moveTo(stream.readInt(4, "le")-4);
+    return stream.carve();
+}
+
 
 /**
  * FLV extractor.