1 files changed, 41 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/audio/AudioListener.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/audio/AudioListener.java
new file mode 100644
index 0000000000..457f52b887
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/audio/AudioListener.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.
+ */
+package org.mozilla.thirdparty.com.google.android.exoplayer2.audio;
+
+/** A listener for changes in audio configuration. */
+public interface AudioListener {
+
+  /**
+   * Called when the audio session is set.
+   *
+   * @param audioSessionId The audio session id.
+   */
+  default void onAudioSessionId(int audioSessionId) {}
+
+  /**
+   * Called when the audio attributes change.
+   *
+   * @param audioAttributes The audio attributes.
+   */
+  default void onAudioAttributesChanged(AudioAttributes audioAttributes) {}
+
+  /**
+   * Called when the volume changes.
+   *
+   * @param volume The new volume, with 0 being silence and 1 being unity gain.
+   */
+  default void onVolumeChanged(float volume) {}
+}