From 13f2e56dc1f183e23ac95ae52b6fd885ba03a061 Mon Sep 17 00:00:00 2001
From: Lucas Segurado <lsegurado1996@gmail.com>
Date: Tue, 11 Mar 2025 13:57:07 +0100
Subject: [PATCH 1/2] Added support for trusted types

---
 packages/ffmpeg/package.json   | 1 +
 packages/ffmpeg/src/classes.ts | 9 +++++----
 packages/ffmpeg/src/types.ts   | 5 +++++
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/packages/ffmpeg/package.json b/packages/ffmpeg/package.json
index bf68fe14988..dfc6cc9edd9 100644
--- a/packages/ffmpeg/package.json
+++ b/packages/ffmpeg/package.json
@@ -63,6 +63,7 @@
     "webpack-cli": "^5.1.4"
   },
   "dependencies": {
+    "@types/trusted-types": "^2.0.7",
     "@ffmpeg/types": "^0.12.4"
   }
 }
diff --git a/packages/ffmpeg/src/classes.ts b/packages/ffmpeg/src/classes.ts
index bec0354fb35..c02edd019ff 100644
--- a/packages/ffmpeg/src/classes.ts
+++ b/packages/ffmpeg/src/classes.ts
@@ -185,17 +185,18 @@ export class FFmpeg {
    * @returns `true` if ffmpeg core is loaded for the first time.
    */
   public load = (
-    { classWorkerURL, ...config }: FFMessageLoadConfig = {},
+    { classWorkerURL, trustedTypePolicy, ...config }: FFMessageLoadConfig = { },
     { signal }: FFMessageOptions = {}
   ): Promise<IsFirst> => {
+    const createScriptURL = ((url: string) => (trustedTypePolicy ?? window.trustedTypes?.defaultPolicy)?.createScriptURL?.(url) ?? url)
     if (!this.#worker) {
       this.#worker = classWorkerURL ?
-        new Worker(new URL(classWorkerURL, import.meta.url), {
+        new Worker(createScriptURL(new URL(classWorkerURL, import.meta.url).toString()), {
           type: "module",
         }) :
         // We need to duplicated the code here to enable webpack
         // to bundle worekr.js here.
-        new Worker(new URL("./worker.js", import.meta.url), {
+        new Worker(createScriptURL(new URL("./worker.js", import.meta.url).toString()), {
           type: "module",
         });
       this.#registerHandlers();
@@ -340,7 +341,7 @@ export class FFmpeg {
     ) as Promise<OK>;
   };
 
-  public mount = (fsType: FFFSType, options: FFFSMountOptions, mountPoint: FFFSPath, ): Promise<OK> => {
+  public mount = (fsType: FFFSType, options: FFFSMountOptions, mountPoint: FFFSPath): Promise<OK> => {
     const trans: Transferable[] = [];
     return this.#send(
       {
diff --git a/packages/ffmpeg/src/types.ts b/packages/ffmpeg/src/types.ts
index 6082a6d908d..3fca59f6110 100644
--- a/packages/ffmpeg/src/types.ts
+++ b/packages/ffmpeg/src/types.ts
@@ -30,6 +30,11 @@ export interface FFMessageLoadConfig {
    * @defaultValue `./worker.js`
    */
   classWorkerURL?: string;
+
+  /**
+   * Trusted type policy to use on workers
+   */
+  trustedTypePolicy?: TrustedTypePolicy
 }
 
 export interface FFMessageExecData {

From afdc9e367e39aae697c2512fbba90781ebe2dd7e Mon Sep 17 00:00:00 2001
From: Lucas Segurado <lsegurado1996@gmail.com>
Date: Wed, 12 Mar 2025 21:21:01 +0100
Subject: [PATCH 2/2] Small type bugfix

---
 packages/ffmpeg/src/classes.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/ffmpeg/src/classes.ts b/packages/ffmpeg/src/classes.ts
index c02edd019ff..dbc761f7498 100644
--- a/packages/ffmpeg/src/classes.ts
+++ b/packages/ffmpeg/src/classes.ts
@@ -188,7 +188,7 @@ export class FFmpeg {
     { classWorkerURL, trustedTypePolicy, ...config }: FFMessageLoadConfig = { },
     { signal }: FFMessageOptions = {}
   ): Promise<IsFirst> => {
-    const createScriptURL = ((url: string) => (trustedTypePolicy ?? window.trustedTypes?.defaultPolicy)?.createScriptURL?.(url) ?? url)
+    const createScriptURL = ((url: string) => ((trustedTypePolicy ?? window.trustedTypes?.defaultPolicy)?.createScriptURL?.(url) ?? url) as unknown as string)
     if (!this.#worker) {
       this.#worker = classWorkerURL ?
         new Worker(createScriptURL(new URL(classWorkerURL, import.meta.url).toString()), {