From 6e03dcdfa1fa18a7865085186b7e33790489d46c Mon Sep 17 00:00:00 2001
From: olly <olly@google.com>
Date: Thu, 24 Aug 2017 05:30:36 -0700
Subject: [PATCH] Add LocalMediaDrmCallback. Useful for providing local keys.

Issue: #3178

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=166330215
---
 .../exoplayer2/drm/LocalMediaDrmCallback.java | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 library/core/src/main/java/com/google/android/exoplayer2/drm/LocalMediaDrmCallback.java

diff --git a/library/core/src/main/java/com/google/android/exoplayer2/drm/LocalMediaDrmCallback.java b/library/core/src/main/java/com/google/android/exoplayer2/drm/LocalMediaDrmCallback.java
new file mode 100644
index 00000000000..7b9aeca30ae
--- /dev/null
+++ b/library/core/src/main/java/com/google/android/exoplayer2/drm/LocalMediaDrmCallback.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2017 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.google.android.exoplayer2.drm;
+
+import com.google.android.exoplayer2.drm.ExoMediaDrm.KeyRequest;
+import com.google.android.exoplayer2.drm.ExoMediaDrm.ProvisionRequest;
+import com.google.android.exoplayer2.util.Assertions;
+import java.io.IOException;
+import java.util.UUID;
+
+/**
+ * A {@link MediaDrmCallback} that provides a fixed response to key requests. Provisioning is not
+ * supported. This implementation is primarily useful for providing locally stored keys to decrypt
+ * ClearKey protected content. It is not suitable for use with Widevine or PlayReady protected
+ * content.
+ */
+public final class LocalMediaDrmCallback implements MediaDrmCallback {
+
+  private final byte[] keyResponse;
+
+  /**
+   * @param keyResponse The fixed response for all key requests.
+   */
+  public LocalMediaDrmCallback(byte[] keyResponse) {
+    this.keyResponse = Assertions.checkNotNull(keyResponse);
+  }
+
+  @Override
+  public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  @Override
+  public byte[] executeKeyRequest(UUID uuid, KeyRequest request) throws Exception {
+    return keyResponse;
+  }
+
+}