diff --git a/audio/common/all-versions/default/Android.bp b/audio/common/all-versions/default/Android.bp
index c24f4b0..6b09d54 100644
--- a/audio/common/all-versions/default/Android.bp
+++ b/audio/common/all-versions/default/Android.bp
@@ -38,3 +38,73 @@
         "android.hardware.audio.common.util@all-versions",
     ]
 }
+
+cc_library_shared {
+    name: "android.hardware.audio.common@2.0-util",
+    defaults: ["hidl_defaults"],
+    vendor_available: true,
+    srcs: [
+        "HidlUtils.cpp",
+    ],
+
+    export_include_dirs: ["."],
+
+    static_libs: [
+    ],
+
+    shared_libs: [
+        "liblog",
+        "libutils",
+        "libhidlbase",
+        "android.hardware.audio.common-util",
+        "android.hardware.audio.common@2.0",
+    ],
+    export_shared_lib_headers: [
+        "android.hardware.audio.common-util"
+    ],
+
+    header_libs: [
+        "libaudio_system_headers",
+        "libhardware_headers",
+    ],
+    cflags: [
+        "-DMAJOR_VERSION=2",
+        "-DMINOR_VERSION=0",
+        "-include common/all-versions/VersionMacro.h",
+    ]
+}
+
+cc_library_shared {
+    name: "android.hardware.audio.common@4.0-util",
+    defaults: ["hidl_defaults"],
+    vendor_available: true,
+    srcs: [
+        "HidlUtils.cpp",
+    ],
+
+    export_include_dirs: ["."],
+
+    static_libs: [
+    ],
+
+    shared_libs: [
+        "liblog",
+        "libutils",
+        "libhidlbase",
+        "android.hardware.audio.common-util",
+        "android.hardware.audio.common@4.0",
+    ],
+    export_shared_lib_headers: [
+        "android.hardware.audio.common-util"
+    ],
+
+    header_libs: [
+        "libaudio_system_headers",
+        "libhardware_headers",
+    ],
+    cflags: [
+        "-DMAJOR_VERSION=4",
+        "-DMINOR_VERSION=0",
+        "-include common/all-versions/VersionMacro.h",
+    ]
+}
diff --git a/audio/common/all-versions/default/EffectMap.cpp b/audio/common/all-versions/default/EffectMap.cpp
index 7f8da1e..cb3e3d5 100644
--- a/audio/common/all-versions/default/EffectMap.cpp
+++ b/audio/common/all-versions/default/EffectMap.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * 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.
diff --git a/audio/common/all-versions/default/include/common/all-versions/default/HidlUtils.impl.h b/audio/common/all-versions/default/HidlUtils.cpp
similarity index 92%
rename from audio/common/all-versions/default/include/common/all-versions/default/HidlUtils.impl.h
rename to audio/common/all-versions/default/HidlUtils.cpp
index 03b50b5..5ed059c 100644
--- a/audio/common/all-versions/default/include/common/all-versions/default/HidlUtils.impl.h
+++ b/audio/common/all-versions/default/HidlUtils.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * 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.
@@ -14,24 +14,22 @@
  * limitations under the License.
  */
 
-#ifndef AUDIO_HAL_VERSION
-#error "AUDIO_HAL_VERSION must be set before including this file."
-#endif
+#include "HidlUtils.h"
 
 #include <common/all-versions/VersionUtils.h>
 #include <string.h>
 
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioChannelMask;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioDevice;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioFormat;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioGainMode;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioMixLatencyClass;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioPortConfigMask;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioPortRole;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioPortType;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioSource;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioStreamType;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioUsage;
+using ::android::hardware::audio::common::CPP_VERSION::AudioChannelMask;
+using ::android::hardware::audio::common::CPP_VERSION::AudioDevice;
+using ::android::hardware::audio::common::CPP_VERSION::AudioFormat;
+using ::android::hardware::audio::common::CPP_VERSION::AudioGainMode;
+using ::android::hardware::audio::common::CPP_VERSION::AudioMixLatencyClass;
+using ::android::hardware::audio::common::CPP_VERSION::AudioPortConfigMask;
+using ::android::hardware::audio::common::CPP_VERSION::AudioPortRole;
+using ::android::hardware::audio::common::CPP_VERSION::AudioPortType;
+using ::android::hardware::audio::common::CPP_VERSION::AudioSource;
+using ::android::hardware::audio::common::CPP_VERSION::AudioStreamType;
+using ::android::hardware::audio::common::CPP_VERSION::AudioUsage;
 
 using ::android::hardware::audio::common::utils::EnumBitfield;
 
@@ -39,7 +37,7 @@
 namespace hardware {
 namespace audio {
 namespace common {
-namespace AUDIO_HAL_VERSION {
+namespace CPP_VERSION {
 
 void HidlUtils::audioConfigFromHal(const audio_config_t& halConfig, AudioConfig* config) {
     config->sampleRateHz = halConfig.sample_rate;
@@ -358,7 +356,7 @@
     memcpy(halUuid->node, uuid.node.data(), uuid.node.size());
 }
 
-}  // namespace AUDIO_HAL_VERSION
+}  // namespace CPP_VERSION
 }  // namespace common
 }  // namespace audio
 }  // namespace hardware
diff --git a/audio/common/all-versions/default/include/common/all-versions/default/HidlUtils.h b/audio/common/all-versions/default/HidlUtils.h
similarity index 78%
rename from audio/common/all-versions/default/include/common/all-versions/default/HidlUtils.h
rename to audio/common/all-versions/default/HidlUtils.h
index 48fa545..77c8b89 100644
--- a/audio/common/all-versions/default/include/common/all-versions/default/HidlUtils.h
+++ b/audio/common/all-versions/default/HidlUtils.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * 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.
@@ -14,28 +14,29 @@
  * limitations under the License.
  */
 
-#ifndef AUDIO_HAL_VERSION
-#error "AUDIO_HAL_VERSION must be set before including this file."
-#endif
+#ifndef android_hardware_audio_Hidl_Utils_H_
+#define android_hardware_audio_Hidl_Utils_H_
+
+#include PATH(android/hardware/audio/common/FILE_VERSION/types.h)
 
 #include <memory>
 
 #include <system/audio.h>
 
 using ::android::hardware::hidl_vec;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioConfig;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioGain;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioGainConfig;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioOffloadInfo;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioPort;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::AudioPortConfig;
-using ::android::hardware::audio::common::AUDIO_HAL_VERSION::Uuid;
+using ::android::hardware::audio::common::CPP_VERSION::AudioConfig;
+using ::android::hardware::audio::common::CPP_VERSION::AudioGain;
+using ::android::hardware::audio::common::CPP_VERSION::AudioGainConfig;
+using ::android::hardware::audio::common::CPP_VERSION::AudioOffloadInfo;
+using ::android::hardware::audio::common::CPP_VERSION::AudioPort;
+using ::android::hardware::audio::common::CPP_VERSION::AudioPortConfig;
+using ::android::hardware::audio::common::CPP_VERSION::Uuid;
 
 namespace android {
 namespace hardware {
 namespace audio {
 namespace common {
-namespace AUDIO_HAL_VERSION {
+namespace CPP_VERSION {
 
 class HidlUtils {
    public:
@@ -68,8 +69,10 @@
     static void uuidToHal(const Uuid& uuid, audio_uuid_t* halUuid);
 };
 
-}  // namespace AUDIO_HAL_VERSION
+}  // namespace CPP_VERSION
 }  // namespace common
 }  // namespace audio
 }  // namespace hardware
 }  // namespace android
+
+#endif  // android_hardware_audio_Hidl_Utils_H_
diff --git a/audio/common/all-versions/default/OWNERS b/audio/common/all-versions/default/OWNERS
new file mode 100644
index 0000000..6fdc97c
--- /dev/null
+++ b/audio/common/all-versions/default/OWNERS
@@ -0,0 +1,3 @@
+elaurent@google.com
+krocard@google.com
+mnaganov@google.com
diff --git a/audio/common/all-versions/default/VersionUtils.h b/audio/common/all-versions/default/VersionUtils.h
new file mode 100644
index 0000000..4726b5b
--- /dev/null
+++ b/audio/common/all-versions/default/VersionUtils.h
@@ -0,0 +1,48 @@
+/*
+ * 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_VERSION_UTILS_H
+#define ANDROID_HARDWARE_AUDIO_EFFECT_VERSION_UTILS_H
+
+#include PATH(android/hardware/audio/common/FILE_VERSION/types.h)
+
+namespace android {
+namespace hardware {
+namespace audio {
+namespace common {
+namespace CPP_VERSION {
+namespace implementation {
+
+#if MAJOR_VERSION == 2
+typedef common::CPP_VERSION::AudioDevice AudioDeviceBitfield;
+typedef common::CPP_VERSION::AudioChannelMask AudioChannelBitfield;
+typedef common::CPP_VERSION::AudioOutputFlag AudioOutputFlagBitfield;
+typedef common::CPP_VERSION::AudioInputFlag AudioInputFlagBitfield;
+#elif MAJOR_VERSION == 4
+typedef hidl_bitfield<common::CPP_VERSION::AudioDevice> AudioDeviceBitfield;
+typedef hidl_bitfield<common::CPP_VERSION::AudioChannelMask> AudioChannelBitfield;
+typedef hidl_bitfield<common::CPP_VERSION::AudioOutputFlag> AudioOutputFlagBitfield;
+typedef hidl_bitfield<common::CPP_VERSION::AudioInputFlag> AudioInputFlagBitfield;
+#endif
+
+}  // namespace implementation
+}  // namespace CPP_VERSION
+}  // namespace common
+}  // namespace audio
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_AUDIO_EFFECT_VERSION_UTILS_H
diff --git a/audio/common/all-versions/default/include/common/all-versions/default/EffectMap.h b/audio/common/all-versions/default/include/common/all-versions/default/EffectMap.h
index 547c6d5..7f630bf 100644
--- a/audio/common/all-versions/default/include/common/all-versions/default/EffectMap.h
+++ b/audio/common/all-versions/default/include/common/all-versions/default/EffectMap.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * 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.