1 files changed, 80 insertions, 0 deletions
diff --git a/tuner/src/com/android/tv/tuner/tvinput/AudioCapabilitiesReceiverV1Wrapper.java b/tuner/src/com/android/tv/tuner/tvinput/AudioCapabilitiesReceiverV1Wrapper.java
new file mode 100644
index 00000000..4c35ea43
--- /dev/null
+++ b/tuner/src/com/android/tv/tuner/tvinput/AudioCapabilitiesReceiverV1Wrapper.java
@@ -0,0 +1,80 @@
+/*
+ * 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 com.android.tv.tuner.tvinput;
+
+import android.content.Context;
+import android.os.Handler;
+import android.util.Log;
+import com.google.android.exoplayer.audio.AudioCapabilities;
+import com.google.android.exoplayer.audio.AudioCapabilitiesReceiver;
+
+/**
+ * Wraps {@link AudioCapabilitiesReceiver} to support listening for audio capabilities changes on
+ * custom threads.
+ */
+public final class AudioCapabilitiesReceiverV1Wrapper {
+
+    private static final String TAG = "AudioCapabilitiesReceiverV1Wrapper";
+
+    private final AudioCapabilitiesReceiver mAudioCapabilitiesReceiver;
+    private final Handler mHandler;
+    private final AudioCapabilitiesReceiver.Listener mListener;
+    private boolean mRegistered;
+
+    /**
+     * Creates an instance.
+     *
+     * @param context A context for registering the receiver.
+     * @param handler A handler on the which mListener events will be posted.
+     * @param listener The listener to notify when audio capabilities change.
+     */
+    public AudioCapabilitiesReceiverV1Wrapper(
+            Context context, Handler handler, AudioCapabilitiesReceiver.Listener listener) {
+        mAudioCapabilitiesReceiver =
+                new AudioCapabilitiesReceiver(context, this::onAudioCapabilitiesChanged);
+        mHandler = handler;
+        mListener = listener;
+    }
+
+    /** @see AudioCapabilitiesReceiver#register() */
+    public AudioCapabilities register() {
+        mRegistered = true;
+        return mAudioCapabilitiesReceiver.register();
+    }
+
+    /** @see AudioCapabilitiesReceiver#unregister() */
+    public void unregister() {
+        if (mRegistered) {
+            try {
+                mAudioCapabilitiesReceiver.unregister();
+            } catch (IllegalArgumentException e) {
+                // Workaround for b/115739362.
+                Log.e(
+                        TAG,
+                        "Ignoring exception when unregistering audio capabilities receiver: ",
+                        e);
+            }
+            mRegistered = false;
+        } else {
+            Log.e(TAG, "Attempt to unregister a non-registered audio capabilities receiver.");
+        }
+    }
+
+    private void onAudioCapabilitiesChanged(AudioCapabilities audioCapabilities) {
+        mHandler.post(() -> mListener.onAudioCapabilitiesChanged(audioCapabilities));
+    }
+}