Add push-to-talk sound effects

Fixes https://github.com/vector-im/element-call/issues/296

src/sound/PTTClips.tsx

@@ -0,0 +1,62 @@
+/*
+Copyright 2022 Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from "react";
+
+import startTalkLocalOggUrl from "./start_talk_local.ogg";
+import startTalkLocalMp3Url from "./start_talk_local.mp3";
+import startTalkRemoteOggUrl from "./start_talk_remote.ogg";
+import startTalkRemoteMp3Url from "./start_talk_remote.mp3";
+import blockedOggUrl from "./blocked.ogg";
+import blockedMp3Url from "./blocked.mp3";
+import styles from "./PTTClips.module.css";
+
+interface Props {
+  startTalkingLocalRef: React.RefObject<HTMLAudioElement>;
+  startTalkingRemoteRef: React.RefObject<HTMLAudioElement>;
+  blockedRef: React.RefObject<HTMLAudioElement>;
+}
+
+export const PTTClips: React.FC<Props> = ({
+  startTalkingLocalRef,
+  startTalkingRemoteRef,
+  blockedRef,
+}) => {
+  return (
+    <>
+      <audio
+        preload="true"
+        className={styles.pttClip}
+        ref={startTalkingLocalRef}
+      >
+        <source type="audio/ogg" src={startTalkLocalOggUrl} />
+        <source type="audio/mpeg" src={startTalkLocalMp3Url} />
+      </audio>
+      <audio
+        preload="true"
+        className={styles.pttClip}
+        ref={startTalkingRemoteRef}
+      >
+        <source type="audio/ogg" src={startTalkRemoteOggUrl} />
+        <source type="audio/mpeg" src={startTalkRemoteMp3Url} />
+      </audio>
+      <audio preload="true" className={styles.pttClip} ref={blockedRef}>
+        <source type="audio/ogg" src={blockedOggUrl} />
+        <source type="audio/mpeg" src={blockedMp3Url} />
+      </audio>
+    </>
+  );
+};