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diff --git a/audio/effect/all-versions/default/VirtualizerEffect.h b/audio/effect/all-versions/default/VirtualizerEffect.h
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+++ b/audio/effect/all-versions/default/VirtualizerEffect.h
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+/*
+ * 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.
+ */
+
+#ifndef ANDROID_HARDWARE_AUDIO_EFFECT_VIRTUALIZEREFFECT_H
+#define ANDROID_HARDWARE_AUDIO_EFFECT_VIRTUALIZEREFFECT_H
+
+#include PATH(android/hardware/audio/effect/FILE_VERSION/IVirtualizerEffect.h)
+
+#include "Effect.h"
+
+#include <hidl/Status.h>
+
+#include <hidl/MQDescriptor.h>
+
+#include "VersionUtils.h"
+
+namespace android {
+namespace hardware {
+namespace audio {
+namespace effect {
+namespace CPP_VERSION {
+namespace implementation {
+
+using ::android::sp;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+using ::android::hardware::audio::common::CPP_VERSION::implementation::AudioChannelBitfield;
+using namespace ::android::hardware::audio::common::CPP_VERSION;
+using namespace ::android::hardware::audio::effect::CPP_VERSION;
+
+struct VirtualizerEffect : public IVirtualizerEffect {
+    explicit VirtualizerEffect(effect_handle_t handle);
+
+    // Methods from ::android::hardware::audio::effect::CPP_VERSION::IEffect follow.
+    Return<Result> init() override;
+    Return<Result> setConfig(
+        const EffectConfig& config, const sp<IEffectBufferProviderCallback>& inputBufferProvider,
+        const sp<IEffectBufferProviderCallback>& outputBufferProvider) override;
+    Return<Result> reset() override;
+    Return<Result> enable() override;
+    Return<Result> disable() override;
+    Return<Result> setDevice(AudioDeviceBitfield device) override;
+    Return<void> setAndGetVolume(const hidl_vec<uint32_t>& volumes,
+                                 setAndGetVolume_cb _hidl_cb) override;
+    Return<Result> volumeChangeNotification(const hidl_vec<uint32_t>& volumes) override;
+    Return<Result> setAudioMode(AudioMode mode) override;
+    Return<Result> setConfigReverse(
+        const EffectConfig& config, const sp<IEffectBufferProviderCallback>& inputBufferProvider,
+        const sp<IEffectBufferProviderCallback>& outputBufferProvider) override;
+    Return<Result> setInputDevice(AudioDeviceBitfield device) override;
+    Return<void> getConfig(getConfig_cb _hidl_cb) override;
+    Return<void> getConfigReverse(getConfigReverse_cb _hidl_cb) override;
+    Return<void> getSupportedAuxChannelsConfigs(
+        uint32_t maxConfigs, getSupportedAuxChannelsConfigs_cb _hidl_cb) override;
+    Return<void> getAuxChannelsConfig(getAuxChannelsConfig_cb _hidl_cb) override;
+    Return<Result> setAuxChannelsConfig(const EffectAuxChannelsConfig& config) override;
+    Return<Result> setAudioSource(AudioSource source) override;
+    Return<Result> offload(const EffectOffloadParameter& param) override;
+    Return<void> getDescriptor(getDescriptor_cb _hidl_cb) override;
+    Return<void> prepareForProcessing(prepareForProcessing_cb _hidl_cb) override;
+    Return<Result> setProcessBuffers(const AudioBuffer& inBuffer,
+                                     const AudioBuffer& outBuffer) override;
+    Return<void> command(uint32_t commandId, const hidl_vec<uint8_t>& data, uint32_t resultMaxSize,
+                         command_cb _hidl_cb) override;
+    Return<Result> setParameter(const hidl_vec<uint8_t>& parameter,
+                                const hidl_vec<uint8_t>& value) override;
+    Return<void> getParameter(const hidl_vec<uint8_t>& parameter, uint32_t valueMaxSize,
+                              getParameter_cb _hidl_cb) override;
+    Return<void> getSupportedConfigsForFeature(uint32_t featureId, uint32_t maxConfigs,
+                                               uint32_t configSize,
+                                               getSupportedConfigsForFeature_cb _hidl_cb) override;
+    Return<void> getCurrentConfigForFeature(uint32_t featureId, uint32_t configSize,
+                                            getCurrentConfigForFeature_cb _hidl_cb) override;
+    Return<Result> setCurrentConfigForFeature(uint32_t featureId,
+                                              const hidl_vec<uint8_t>& configData) override;
+    Return<Result> close() override;
+    Return<void> debug(const hidl_handle& fd, const hidl_vec<hidl_string>& options) override;
+
+    // Methods from ::android::hardware::audio::effect::CPP_VERSION::IVirtualizerEffect
+    // follow.
+    Return<bool> isStrengthSupported() override;
+    Return<Result> setStrength(uint16_t strength) override;
+    Return<void> getStrength(getStrength_cb _hidl_cb) override;
+    Return<void> getVirtualSpeakerAngles(AudioChannelBitfield mask, AudioDevice device,
+                                         getVirtualSpeakerAngles_cb _hidl_cb) override;
+    Return<Result> forceVirtualizationMode(AudioDevice device) override;
+    Return<void> getVirtualizationMode(getVirtualizationMode_cb _hidl_cb) override;
+
+   private:
+    sp<Effect> mEffect;
+
+    virtual ~VirtualizerEffect();
+
+    void speakerAnglesFromHal(const int32_t* halAngles, uint32_t channelCount,
+                              hidl_vec<SpeakerAngle>& speakerAngles);
+};
+
+}  // namespace implementation
+}  // namespace CPP_VERSION
+}  // namespace effect
+}  // namespace audio
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_AUDIO_EFFECT_VIRTUALIZEREFFECT_H