diff --git a/extensions/av1/src/main/jni/CMakeLists.txt b/extensions/av1/src/main/jni/CMakeLists.txt
index fe0e8edaeb..cb080e3c47 100644
--- a/extensions/av1/src/main/jni/CMakeLists.txt
+++ b/extensions/av1/src/main/jni/CMakeLists.txt
@@ -1,3 +1,19 @@
+#
+# Copyright 2021 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.
+#
+
 cmake_minimum_required(VERSION 3.7.1 FATAL_ERROR)
 set(CMAKE_CXX_STANDARD 11)
 
diff --git a/extensions/av1/src/main/jni/cpu_info.cc b/extensions/av1/src/main/jni/cpu_info.cc
index 8f4a405f4f..b3133aa19b 100644
--- a/extensions/av1/src/main/jni/cpu_info.cc
+++ b/extensions/av1/src/main/jni/cpu_info.cc
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2021 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.
+ */
 #include "cpu_info.h"  // NOLINT
 
 #include <unistd.h>
diff --git a/extensions/av1/src/main/jni/cpu_info.h b/extensions/av1/src/main/jni/cpu_info.h
index 77f869a93e..e6bf207bcc 100644
--- a/extensions/av1/src/main/jni/cpu_info.h
+++ b/extensions/av1/src/main/jni/cpu_info.h
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2021 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.
+ */
 #ifndef EXOPLAYER_V2_EXTENSIONS_AV1_SRC_MAIN_JNI_CPU_INFO_H_
 #define EXOPLAYER_V2_EXTENSIONS_AV1_SRC_MAIN_JNI_CPU_INFO_H_
 
diff --git a/extensions/ffmpeg/src/main/jni/CMakeLists.txt b/extensions/ffmpeg/src/main/jni/CMakeLists.txt
index fd3e398dd9..c6a89975cf 100644
--- a/extensions/ffmpeg/src/main/jni/CMakeLists.txt
+++ b/extensions/ffmpeg/src/main/jni/CMakeLists.txt
@@ -1,3 +1,19 @@
+#
+# Copyright 2021 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.
+#
+
 cmake_minimum_required(VERSION 3.7.1 FATAL_ERROR)
 
 # Enable C++11 features.