1 files changed, 79 insertions, 0 deletions
diff --git a/mobile/android/modules/geckoview/MediaUtils.sys.mjs b/mobile/android/modules/geckoview/MediaUtils.sys.mjs
new file mode 100644
index 0000000000..81dc35a567
--- /dev/null
+++ b/mobile/android/modules/geckoview/MediaUtils.sys.mjs
@@ -0,0 +1,79 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+export const MediaUtils = {
+  getMetadata(aElement) {
+    if (!aElement) {
+      return null;
+    }
+    return {
+      src: aElement.currentSrc ?? aElement.src,
+      width: aElement.videoWidth ?? 0,
+      height: aElement.videoHeight ?? 0,
+      duration: aElement.duration,
+      seekable: !!aElement.seekable,
+      audioTrackCount:
+        aElement.audioTracks?.length ??
+        aElement.mozHasAudio ??
+        aElement.webkitAudioDecodedByteCount ??
+        MediaUtils.isAudioElement(aElement)
+          ? 1
+          : 0,
+      videoTrackCount:
+        aElement.videoTracks?.length ?? MediaUtils.isVideoElement(aElement)
+          ? 1
+          : 0,
+    };
+  },
+
+  isVideoElement(aElement) {
+    return (
+      aElement && ChromeUtils.getClassName(aElement) === "HTMLVideoElement"
+    );
+  },
+
+  isAudioElement(aElement) {
+    return (
+      aElement && ChromeUtils.getClassName(aElement) === "HTMLAudioElement"
+    );
+  },
+
+  isMediaElement(aElement) {
+    return (
+      MediaUtils.isVideoElement(aElement) || MediaUtils.isAudioElement(aElement)
+    );
+  },
+
+  findMediaElement(aElement) {
+    return (
+      MediaUtils.findVideoElement(aElement) ??
+      MediaUtils.findAudioElement(aElement)
+    );
+  },
+
+  findVideoElement(aElement) {
+    if (!aElement) {
+      return null;
+    }
+    if (MediaUtils.isVideoElement(aElement)) {
+      return aElement;
+    }
+    const childrenMedia = aElement.getElementsByTagName("video");
+    if (childrenMedia && childrenMedia.length) {
+      return childrenMedia[0];
+    }
+    return null;
+  },
+
+  findAudioElement(aElement) {
+    if (!aElement || MediaUtils.isAudioElement(aElement)) {
+      return aElement;
+    }
+    const childrenMedia = aElement.getElementsByTagName("audio");
+    if (childrenMedia && childrenMedia.length) {
+      return childrenMedia[0];
+    }
+    return null;
+  },
+};