diff --git a/cas/aidl/default/DescramblerImpl.h b/cas/aidl/default/DescramblerImpl.h
new file mode 100755
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+++ b/cas/aidl/default/DescramblerImpl.h
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+/*
+ * Copyright (C) 2022 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 <aidl/android/hardware/cas/BnDescrambler.h>
+#include <media/stagefright/foundation/ABase.h>
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace cas {
+
+using namespace ::android;
+using namespace std;
+using ndk::ScopedAStatus;
+
+class DescramblerImpl : public BnDescrambler {
+  public:
+    DescramblerImpl(DescramblerPlugin* plugin);
+    virtual ~DescramblerImpl();
+
+    virtual ScopedAStatus setMediaCasSession(const vector<uint8_t>& in_sessionId) override;
+
+    virtual ScopedAStatus requiresSecureDecoderComponent(const string& in_mime,
+                                                         bool* _aidl_return) override;
+
+    virtual ScopedAStatus descramble(ScramblingControl in_scramblingControl,
+                                     const vector<SubSample>& in_subSamples,
+                                     const SharedBuffer& in_srcBuffer, int64_t in_srcOffset,
+                                     const DestinationBuffer& in_dstBuffer, int64_t in_dstOffset,
+                                     int32_t* _aidl_return) override;
+
+    virtual ScopedAStatus release() override;
+
+  private:
+    shared_ptr<DescramblerPlugin> mPluginHolder;
+
+    DISALLOW_EVIL_CONSTRUCTORS(DescramblerImpl);
+};
+
+}  // namespace cas
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl