1 files changed, 20 insertions, 0 deletions
diff --git a/toolkit/actors/AudioPlaybackChild.sys.mjs b/toolkit/actors/AudioPlaybackChild.sys.mjs
new file mode 100644
index 0000000000..a392a73464
--- /dev/null
+++ b/toolkit/actors/AudioPlaybackChild.sys.mjs
@@ -0,0 +1,20 @@
+/* vim: set ts=2 sw=2 sts=2 et tw=80: */
+/* 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 class AudioPlaybackChild extends JSWindowActorChild {
+  observe(subject, topic, data) {
+    if (topic === "audio-playback") {
+      let name = "AudioPlayback:";
+      if (data === "activeMediaBlockStart") {
+        name += "ActiveMediaBlockStart";
+      } else if (data === "activeMediaBlockStop") {
+        name += "ActiveMediaBlockStop";
+      } else {
+        name += data === "active" ? "Start" : "Stop";
+      }
+      this.sendAsyncMessage(name);
+    }
+  }
+}