diff --git a/src/controller/eme-controller.ts b/src/controller/eme-controller.ts
index 5f91fb7006b..56da024059c 100644
--- a/src/controller/eme-controller.ts
+++ b/src/controller/eme-controller.ts
@@ -544,7 +544,7 @@ class EMEController implements ComponentAPI {
       const json = bin2str(new Uint8Array(initData));
       try {
         const sinf = base64Decode(JSON.parse(json).sinf);
-        const tenc = parseSinf(new Uint8Array(sinf));
+        const tenc = parseSinf(sinf);
         if (!tenc) {
           return;
         }
diff --git a/src/crypt/decrypter.ts b/src/crypt/decrypter.ts
index ada612153dc..9c32acf99cb 100644
--- a/src/crypt/decrypter.ts
+++ b/src/crypt/decrypter.ts
@@ -85,7 +85,8 @@ export default class Decrypter {
   ): Promise<ArrayBuffer> {
     if (this.useSoftware) {
       return new Promise((resolve, reject) => {
-        this.softwareDecrypt(new Uint8Array(data), key, iv);
+        const dataView = ArrayBuffer.isView(data) ? data : new Uint8Array(data);
+        this.softwareDecrypt(dataView, key, iv);
         const decryptResult = this.flush();
         if (decryptResult) {
           resolve(decryptResult.buffer);