Merge "Virtualizer : Add libeffect bundle implementation"
diff --git a/Android.bp b/Android.bp
index 0e0ea1f..5aa2029 100644
--- a/Android.bp
+++ b/Android.bp
@@ -75,10 +75,10 @@
         "av-types-aidl-cpp",
     ],
     header_libs: [
-        "libaudioclient_aidl_conversion_util",
+        "libaudio_aidl_conversion_common_util_cpp",
     ],
     export_header_lib_headers: [
-        "libaudioclient_aidl_conversion_util",
+        "libaudio_aidl_conversion_common_util_cpp",
     ],
     host_supported: true,
     vendor_available: true,
diff --git a/media/audioaidlconversion/AidlConversionCppNdk.cpp b/media/audioaidlconversion/AidlConversionCppNdk.cpp
new file mode 100644
index 0000000..ea1ec0c
--- /dev/null
+++ b/media/audioaidlconversion/AidlConversionCppNdk.cpp
@@ -0,0 +1,2130 @@
+/*
+ * 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 <algorithm>
+#include <map>
+#include <utility>
+#include <vector>
+
+#define LOG_TAG "AidlConversionCppNdk"
+//#define LOG_NDEBUG 0
+#include <utils/Log.h>
+
+#include "media/AidlConversionCppNdk.h"
+
+#include <media/ShmemCompat.h>
+#include <media/stagefright/foundation/MediaDefs.h>
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Utilities
+
+#if defined(BACKEND_NDK)
+/* AIDL String generated in NDK is different than CPP */
+#define GET_DEVICE_DESC_CONNECTION(x)  AudioDeviceDescription::CONNECTION_##x
+namespace aidl {
+#else
+#define GET_DEVICE_DESC_CONNECTION(x)  AudioDeviceDescription::CONNECTION_##x()
+#endif
+
+namespace android {
+
+using ::android::BAD_VALUE;
+using ::android::OK;
+using ::android::base::unexpected;
+
+using media::audio::common::AudioChannelLayout;
+using media::audio::common::AudioConfig;
+using media::audio::common::AudioConfigBase;
+using media::audio::common::AudioContentType;
+using media::audio::common::AudioDevice;
+using media::audio::common::AudioDeviceAddress;
+using media::audio::common::AudioDeviceDescription;
+using media::audio::common::AudioDeviceType;
+using media::audio::common::AudioEncapsulationMetadataType;
+using media::audio::common::AudioEncapsulationMode;
+using media::audio::common::AudioEncapsulationType;
+using media::audio::common::AudioFormatDescription;
+using media::audio::common::AudioFormatType;
+using media::audio::common::AudioGain;
+using media::audio::common::AudioGainConfig;
+using media::audio::common::AudioGainMode;
+using media::audio::common::AudioInputFlags;
+using media::audio::common::AudioIoFlags;
+using media::audio::common::AudioMode;
+using media::audio::common::AudioOffloadInfo;
+using media::audio::common::AudioOutputFlags;
+using media::audio::common::AudioPortDeviceExt;
+using media::audio::common::AudioPortExt;
+using media::audio::common::AudioPortMixExt;
+using media::audio::common::AudioPortMixExtUseCase;
+using media::audio::common::AudioProfile;
+using media::audio::common::AudioSource;
+using media::audio::common::AudioStandard;
+using media::audio::common::AudioStreamType;
+using media::audio::common::AudioUsage;
+using media::audio::common::AudioUuid;
+using media::audio::common::ExtraAudioDescriptor;
+using media::audio::common::Int;
+using media::audio::common::PcmType;
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Converters
+
+::android::status_t aidl2legacy_string(std::string_view aidl, char* dest, size_t maxSize) {
+    if (aidl.size() > maxSize - 1) {
+        return BAD_VALUE;
+    }
+    aidl.copy(dest, aidl.size());
+    dest[aidl.size()] = '\0';
+    return OK;
+}
+
+ConversionResult<std::string> legacy2aidl_string(const char* legacy, size_t maxSize) {
+    if (legacy == nullptr) {
+        return unexpected(BAD_VALUE);
+    }
+    if (strnlen(legacy, maxSize) == maxSize) {
+        // No null-terminator.
+        return unexpected(BAD_VALUE);
+    }
+    return std::string(legacy);
+}
+
+ConversionResult<audio_module_handle_t> aidl2legacy_int32_t_audio_module_handle_t(int32_t aidl) {
+    return convertReinterpret<audio_module_handle_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_module_handle_t_int32_t(audio_module_handle_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<audio_io_handle_t> aidl2legacy_int32_t_audio_io_handle_t(int32_t aidl) {
+    return convertReinterpret<audio_io_handle_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_io_handle_t_int32_t(audio_io_handle_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<audio_port_handle_t> aidl2legacy_int32_t_audio_port_handle_t(int32_t aidl) {
+    return convertReinterpret<audio_port_handle_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_port_handle_t_int32_t(audio_port_handle_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<audio_patch_handle_t> aidl2legacy_int32_t_audio_patch_handle_t(int32_t aidl) {
+    return convertReinterpret<audio_patch_handle_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_patch_handle_t_int32_t(audio_patch_handle_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<audio_unique_id_t> aidl2legacy_int32_t_audio_unique_id_t(int32_t aidl) {
+    return convertReinterpret<audio_unique_id_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_unique_id_t_int32_t(audio_unique_id_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<audio_hw_sync_t> aidl2legacy_int32_t_audio_hw_sync_t(int32_t aidl) {
+    return convertReinterpret<audio_hw_sync_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_hw_sync_t_int32_t(audio_hw_sync_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<pid_t> aidl2legacy_int32_t_pid_t(int32_t aidl) {
+    return convertReinterpret<pid_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_pid_t_int32_t(pid_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<uid_t> aidl2legacy_int32_t_uid_t(int32_t aidl) {
+    return convertReinterpret<uid_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_uid_t_int32_t(uid_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<String16> aidl2legacy_string_view_String16(std::string_view aidl) {
+    return String16(aidl.data(), aidl.size());
+}
+
+ConversionResult<std::string> legacy2aidl_String16_string(const String16& legacy) {
+    return std::string(String8(legacy).c_str());
+}
+
+// TODO b/182392769: create an optional -> optional util
+ConversionResult<std::optional<String16>>
+aidl2legacy_optional_string_view_optional_String16(std::optional<std::string_view> aidl) {
+    if (!aidl.has_value()) {
+        return std::nullopt;
+    }
+    ConversionResult<String16> conversion =
+        VALUE_OR_RETURN(aidl2legacy_string_view_String16(aidl.value()));
+    return conversion.value();
+}
+
+ConversionResult<std::optional<std::string_view>>
+legacy2aidl_optional_String16_optional_string(std::optional<String16> legacy) {
+  if (!legacy.has_value()) {
+    return std::nullopt;
+  }
+  ConversionResult<std::string> conversion =
+      VALUE_OR_RETURN(legacy2aidl_String16_string(legacy.value()));
+  return conversion.value();
+}
+
+ConversionResult<String8> aidl2legacy_string_view_String8(std::string_view aidl) {
+    return String8(aidl.data(), aidl.size());
+}
+
+ConversionResult<std::string> legacy2aidl_String8_string(const String8& legacy) {
+    return std::string(legacy.c_str());
+}
+
+namespace {
+
+namespace detail {
+using AudioChannelBitPair = std::pair<audio_channel_mask_t, int>;
+using AudioChannelBitPairs = std::vector<AudioChannelBitPair>;
+using AudioChannelPair = std::pair<audio_channel_mask_t, AudioChannelLayout>;
+using AudioChannelPairs = std::vector<AudioChannelPair>;
+using AudioDevicePair = std::pair<audio_devices_t, AudioDeviceDescription>;
+using AudioDevicePairs = std::vector<AudioDevicePair>;
+using AudioFormatPair = std::pair<audio_format_t, AudioFormatDescription>;
+using AudioFormatPairs = std::vector<AudioFormatPair>;
+}
+
+const detail::AudioChannelBitPairs& getInAudioChannelBits() {
+    static const detail::AudioChannelBitPairs pairs = {
+        { AUDIO_CHANNEL_IN_LEFT, AudioChannelLayout::CHANNEL_FRONT_LEFT },
+        { AUDIO_CHANNEL_IN_RIGHT, AudioChannelLayout::CHANNEL_FRONT_RIGHT },
+        // AUDIO_CHANNEL_IN_FRONT is at the end
+        { AUDIO_CHANNEL_IN_BACK, AudioChannelLayout::CHANNEL_BACK_CENTER },
+        // AUDIO_CHANNEL_IN_*_PROCESSED not supported
+        // AUDIO_CHANNEL_IN_PRESSURE not supported
+        // AUDIO_CHANNEL_IN_*_AXIS not supported
+        // AUDIO_CHANNEL_IN_VOICE_* not supported
+        { AUDIO_CHANNEL_IN_BACK_LEFT, AudioChannelLayout::CHANNEL_BACK_LEFT },
+        { AUDIO_CHANNEL_IN_BACK_RIGHT, AudioChannelLayout::CHANNEL_BACK_RIGHT },
+        { AUDIO_CHANNEL_IN_CENTER, AudioChannelLayout::CHANNEL_FRONT_CENTER },
+        { AUDIO_CHANNEL_IN_LOW_FREQUENCY, AudioChannelLayout::CHANNEL_LOW_FREQUENCY },
+        { AUDIO_CHANNEL_IN_TOP_LEFT, AudioChannelLayout::CHANNEL_TOP_SIDE_LEFT },
+        { AUDIO_CHANNEL_IN_TOP_RIGHT, AudioChannelLayout::CHANNEL_TOP_SIDE_RIGHT },
+        // When going from aidl to legacy, IN_CENTER is used
+        { AUDIO_CHANNEL_IN_FRONT, AudioChannelLayout::CHANNEL_FRONT_CENTER }
+    };
+    return pairs;
+}
+
+const detail::AudioChannelPairs& getInAudioChannelPairs() {
+    static const detail::AudioChannelPairs pairs = {
+#define DEFINE_INPUT_LAYOUT(n)                                                 \
+            {                                                                  \
+                AUDIO_CHANNEL_IN_##n,                                          \
+                AudioChannelLayout::make<AudioChannelLayout::Tag::layoutMask>( \
+                        AudioChannelLayout::LAYOUT_##n)                        \
+            }
+
+        DEFINE_INPUT_LAYOUT(MONO),
+        DEFINE_INPUT_LAYOUT(STEREO),
+        DEFINE_INPUT_LAYOUT(FRONT_BACK),
+        // AUDIO_CHANNEL_IN_6 not supported
+        DEFINE_INPUT_LAYOUT(2POINT0POINT2),
+        DEFINE_INPUT_LAYOUT(2POINT1POINT2),
+        DEFINE_INPUT_LAYOUT(3POINT0POINT2),
+        DEFINE_INPUT_LAYOUT(3POINT1POINT2),
+        DEFINE_INPUT_LAYOUT(5POINT1)
+#undef DEFINE_INPUT_LAYOUT
+    };
+    return pairs;
+}
+
+const detail::AudioChannelBitPairs& getOutAudioChannelBits() {
+    static const detail::AudioChannelBitPairs pairs = {
+#define DEFINE_OUTPUT_BITS(n)                                                  \
+            { AUDIO_CHANNEL_OUT_##n, AudioChannelLayout::CHANNEL_##n }
+
+        DEFINE_OUTPUT_BITS(FRONT_LEFT),
+        DEFINE_OUTPUT_BITS(FRONT_RIGHT),
+        DEFINE_OUTPUT_BITS(FRONT_CENTER),
+        DEFINE_OUTPUT_BITS(LOW_FREQUENCY),
+        DEFINE_OUTPUT_BITS(BACK_LEFT),
+        DEFINE_OUTPUT_BITS(BACK_RIGHT),
+        DEFINE_OUTPUT_BITS(FRONT_LEFT_OF_CENTER),
+        DEFINE_OUTPUT_BITS(FRONT_RIGHT_OF_CENTER),
+        DEFINE_OUTPUT_BITS(BACK_CENTER),
+        DEFINE_OUTPUT_BITS(SIDE_LEFT),
+        DEFINE_OUTPUT_BITS(SIDE_RIGHT),
+        DEFINE_OUTPUT_BITS(TOP_CENTER),
+        DEFINE_OUTPUT_BITS(TOP_FRONT_LEFT),
+        DEFINE_OUTPUT_BITS(TOP_FRONT_CENTER),
+        DEFINE_OUTPUT_BITS(TOP_FRONT_RIGHT),
+        DEFINE_OUTPUT_BITS(TOP_BACK_LEFT),
+        DEFINE_OUTPUT_BITS(TOP_BACK_CENTER),
+        DEFINE_OUTPUT_BITS(TOP_BACK_RIGHT),
+        DEFINE_OUTPUT_BITS(TOP_SIDE_LEFT),
+        DEFINE_OUTPUT_BITS(TOP_SIDE_RIGHT),
+        DEFINE_OUTPUT_BITS(BOTTOM_FRONT_LEFT),
+        DEFINE_OUTPUT_BITS(BOTTOM_FRONT_CENTER),
+        DEFINE_OUTPUT_BITS(BOTTOM_FRONT_RIGHT),
+        DEFINE_OUTPUT_BITS(LOW_FREQUENCY_2),
+        DEFINE_OUTPUT_BITS(FRONT_WIDE_LEFT),
+        DEFINE_OUTPUT_BITS(FRONT_WIDE_RIGHT),
+#undef DEFINE_OUTPUT_BITS
+        { AUDIO_CHANNEL_OUT_HAPTIC_A, AudioChannelLayout::CHANNEL_HAPTIC_A },
+        { AUDIO_CHANNEL_OUT_HAPTIC_B, AudioChannelLayout::CHANNEL_HAPTIC_B }
+    };
+    return pairs;
+}
+
+const detail::AudioChannelPairs& getOutAudioChannelPairs() {
+    static const detail::AudioChannelPairs pairs = {
+#define DEFINE_OUTPUT_LAYOUT(n)                                                \
+            {                                                                  \
+                AUDIO_CHANNEL_OUT_##n,                                         \
+                AudioChannelLayout::make<AudioChannelLayout::Tag::layoutMask>( \
+                        AudioChannelLayout::LAYOUT_##n)                        \
+            }
+
+        DEFINE_OUTPUT_LAYOUT(MONO),
+        DEFINE_OUTPUT_LAYOUT(STEREO),
+        DEFINE_OUTPUT_LAYOUT(2POINT1),
+        DEFINE_OUTPUT_LAYOUT(TRI),
+        DEFINE_OUTPUT_LAYOUT(TRI_BACK),
+        DEFINE_OUTPUT_LAYOUT(3POINT1),
+        DEFINE_OUTPUT_LAYOUT(2POINT0POINT2),
+        DEFINE_OUTPUT_LAYOUT(2POINT1POINT2),
+        DEFINE_OUTPUT_LAYOUT(3POINT0POINT2),
+        DEFINE_OUTPUT_LAYOUT(3POINT1POINT2),
+        DEFINE_OUTPUT_LAYOUT(QUAD),
+        DEFINE_OUTPUT_LAYOUT(QUAD_SIDE),
+        DEFINE_OUTPUT_LAYOUT(SURROUND),
+        DEFINE_OUTPUT_LAYOUT(PENTA),
+        DEFINE_OUTPUT_LAYOUT(5POINT1),
+        DEFINE_OUTPUT_LAYOUT(5POINT1_SIDE),
+        DEFINE_OUTPUT_LAYOUT(5POINT1POINT2),
+        DEFINE_OUTPUT_LAYOUT(5POINT1POINT4),
+        DEFINE_OUTPUT_LAYOUT(6POINT1),
+        DEFINE_OUTPUT_LAYOUT(7POINT1),
+        DEFINE_OUTPUT_LAYOUT(7POINT1POINT2),
+        DEFINE_OUTPUT_LAYOUT(7POINT1POINT4),
+        DEFINE_OUTPUT_LAYOUT(13POINT_360RA),
+        DEFINE_OUTPUT_LAYOUT(22POINT2),
+        DEFINE_OUTPUT_LAYOUT(MONO_HAPTIC_A),
+        DEFINE_OUTPUT_LAYOUT(STEREO_HAPTIC_A),
+        DEFINE_OUTPUT_LAYOUT(HAPTIC_AB),
+        DEFINE_OUTPUT_LAYOUT(MONO_HAPTIC_AB),
+        DEFINE_OUTPUT_LAYOUT(STEREO_HAPTIC_AB)
+#undef DEFINE_OUTPUT_LAYOUT
+    };
+    return pairs;
+}
+
+const detail::AudioChannelPairs& getVoiceAudioChannelPairs() {
+    static const detail::AudioChannelPairs pairs = {
+#define DEFINE_VOICE_LAYOUT(n)                                                 \
+            {                                                                  \
+                AUDIO_CHANNEL_IN_VOICE_##n,                                    \
+                AudioChannelLayout::make<AudioChannelLayout::Tag::voiceMask>(  \
+                        AudioChannelLayout::VOICE_##n)                         \
+            }
+        DEFINE_VOICE_LAYOUT(UPLINK_MONO),
+        DEFINE_VOICE_LAYOUT(DNLINK_MONO),
+        DEFINE_VOICE_LAYOUT(CALL_MONO)
+#undef DEFINE_VOICE_LAYOUT
+    };
+    return pairs;
+}
+
+AudioDeviceDescription make_AudioDeviceDescription(AudioDeviceType type,
+        const std::string& connection = "") {
+    AudioDeviceDescription result;
+    result.type = type;
+    result.connection = connection;
+    return result;
+}
+
+void append_AudioDeviceDescription(detail::AudioDevicePairs& pairs,
+        audio_devices_t inputType, audio_devices_t outputType,
+        AudioDeviceType inType, AudioDeviceType outType,
+        const std::string& connection = "") {
+    pairs.push_back(std::make_pair(inputType, make_AudioDeviceDescription(inType, connection)));
+    pairs.push_back(std::make_pair(outputType, make_AudioDeviceDescription(outType, connection)));
+}
+
+const detail::AudioDevicePairs& getAudioDevicePairs() {
+    static const detail::AudioDevicePairs pairs = []() {
+        detail::AudioDevicePairs pairs = {{
+            {
+                AUDIO_DEVICE_NONE, AudioDeviceDescription{}
+            },
+            {
+                AUDIO_DEVICE_OUT_EARPIECE, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_SPEAKER_EARPIECE)
+            },
+            {
+                AUDIO_DEVICE_OUT_SPEAKER, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_SPEAKER)
+            },
+            {
+                AUDIO_DEVICE_OUT_WIRED_HEADPHONE, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_HEADPHONE,
+                        GET_DEVICE_DESC_CONNECTION(ANALOG))
+            },
+            {
+                AUDIO_DEVICE_OUT_BLUETOOTH_SCO, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_DEVICE,
+                        GET_DEVICE_DESC_CONNECTION(BT_SCO))
+            },
+            {
+                AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_CARKIT,
+                        GET_DEVICE_DESC_CONNECTION(BT_SCO))
+            },
+            {
+                AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_HEADPHONE,
+                        GET_DEVICE_DESC_CONNECTION(BT_A2DP))
+            },
+            {
+                AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_SPEAKER,
+                        GET_DEVICE_DESC_CONNECTION(BT_A2DP))
+            },
+            {
+                AUDIO_DEVICE_OUT_TELEPHONY_TX, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_TELEPHONY_TX)
+            },
+            {
+                AUDIO_DEVICE_OUT_AUX_LINE, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_LINE_AUX)
+            },
+            {
+                AUDIO_DEVICE_OUT_SPEAKER_SAFE, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_SPEAKER_SAFE)
+            },
+            {
+                AUDIO_DEVICE_OUT_HEARING_AID, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_HEARING_AID,
+                        GET_DEVICE_DESC_CONNECTION(WIRELESS))
+            },
+            {
+                AUDIO_DEVICE_OUT_ECHO_CANCELLER, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_ECHO_CANCELLER)
+            },
+            {
+                AUDIO_DEVICE_OUT_BLE_SPEAKER, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_SPEAKER,
+                        GET_DEVICE_DESC_CONNECTION(BT_LE))
+            },
+            {
+                AUDIO_DEVICE_OUT_BLE_BROADCAST, make_AudioDeviceDescription(
+                        AudioDeviceType::OUT_BROADCAST,
+                        GET_DEVICE_DESC_CONNECTION(BT_LE))
+            },
+            // AUDIO_DEVICE_IN_AMBIENT and IN_COMMUNICATION are removed since they were deprecated.
+            {
+                AUDIO_DEVICE_IN_BUILTIN_MIC, make_AudioDeviceDescription(
+                        AudioDeviceType::IN_MICROPHONE)
+            },
+            {
+                AUDIO_DEVICE_IN_BACK_MIC, make_AudioDeviceDescription(
+                        AudioDeviceType::IN_MICROPHONE_BACK)
+            },
+            {
+                AUDIO_DEVICE_IN_TELEPHONY_RX, make_AudioDeviceDescription(
+                        AudioDeviceType::IN_TELEPHONY_RX)
+            },
+            {
+                AUDIO_DEVICE_IN_TV_TUNER, make_AudioDeviceDescription(
+                        AudioDeviceType::IN_TV_TUNER)
+            },
+            {
+                AUDIO_DEVICE_IN_LOOPBACK, make_AudioDeviceDescription(
+                        AudioDeviceType::IN_LOOPBACK)
+            },
+            {
+                AUDIO_DEVICE_IN_BLUETOOTH_BLE, make_AudioDeviceDescription(
+                        AudioDeviceType::IN_DEVICE,
+                        GET_DEVICE_DESC_CONNECTION(BT_LE))
+            },
+            {
+                AUDIO_DEVICE_IN_ECHO_REFERENCE, make_AudioDeviceDescription(
+                        AudioDeviceType::IN_ECHO_REFERENCE)
+            }
+        }};
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_DEFAULT, AUDIO_DEVICE_OUT_DEFAULT,
+                AudioDeviceType::IN_DEFAULT, AudioDeviceType::OUT_DEFAULT);
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_WIRED_HEADSET, AUDIO_DEVICE_OUT_WIRED_HEADSET,
+                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
+                GET_DEVICE_DESC_CONNECTION(ANALOG));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET, AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET,
+                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
+                GET_DEVICE_DESC_CONNECTION(BT_SCO));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_HDMI, AUDIO_DEVICE_OUT_HDMI,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(HDMI));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_REMOTE_SUBMIX, AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
+                AudioDeviceType::IN_SUBMIX, AudioDeviceType::OUT_SUBMIX);
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET, AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET,
+                AudioDeviceType::IN_DOCK, AudioDeviceType::OUT_DOCK,
+                GET_DEVICE_DESC_CONNECTION(ANALOG));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET, AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET,
+                AudioDeviceType::IN_DOCK, AudioDeviceType::OUT_DOCK,
+                GET_DEVICE_DESC_CONNECTION(USB));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_USB_ACCESSORY, AUDIO_DEVICE_OUT_USB_ACCESSORY,
+                AudioDeviceType::IN_ACCESSORY, AudioDeviceType::OUT_ACCESSORY,
+                GET_DEVICE_DESC_CONNECTION(USB));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_USB_DEVICE, AUDIO_DEVICE_OUT_USB_DEVICE,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(USB));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_FM_TUNER, AUDIO_DEVICE_OUT_FM,
+                AudioDeviceType::IN_FM_TUNER, AudioDeviceType::OUT_FM);
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_LINE, AUDIO_DEVICE_OUT_LINE,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(ANALOG));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_SPDIF, AUDIO_DEVICE_OUT_SPDIF,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(SPDIF));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_BLUETOOTH_A2DP, AUDIO_DEVICE_OUT_BLUETOOTH_A2DP,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(BT_A2DP));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_IP, AUDIO_DEVICE_OUT_IP,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(IP_V4));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_BUS, AUDIO_DEVICE_OUT_BUS,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(BUS));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_PROXY, AUDIO_DEVICE_OUT_PROXY,
+                AudioDeviceType::IN_AFE_PROXY, AudioDeviceType::OUT_AFE_PROXY);
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_USB_HEADSET, AUDIO_DEVICE_OUT_USB_HEADSET,
+                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
+                GET_DEVICE_DESC_CONNECTION(USB));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_HDMI_ARC, AUDIO_DEVICE_OUT_HDMI_ARC,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(HDMI_ARC));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_HDMI_EARC, AUDIO_DEVICE_OUT_HDMI_EARC,
+                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
+                GET_DEVICE_DESC_CONNECTION(HDMI_EARC));
+        append_AudioDeviceDescription(pairs,
+                AUDIO_DEVICE_IN_BLE_HEADSET, AUDIO_DEVICE_OUT_BLE_HEADSET,
+                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
+                GET_DEVICE_DESC_CONNECTION(BT_LE));
+        return pairs;
+    }();
+#undef GET_DEVICE_DESC_CONNECTION
+    return pairs;
+}
+
+AudioFormatDescription make_AudioFormatDescription(AudioFormatType type) {
+    AudioFormatDescription result;
+    result.type = type;
+    return result;
+}
+
+AudioFormatDescription make_AudioFormatDescription(PcmType pcm) {
+    auto result = make_AudioFormatDescription(AudioFormatType::PCM);
+    result.pcm = pcm;
+    return result;
+}
+
+AudioFormatDescription make_AudioFormatDescription(const std::string& encoding) {
+    AudioFormatDescription result;
+    result.encoding = encoding;
+    return result;
+}
+
+AudioFormatDescription make_AudioFormatDescription(PcmType transport,
+        const std::string& encoding) {
+    auto result = make_AudioFormatDescription(encoding);
+    result.pcm = transport;
+    return result;
+}
+
+const detail::AudioFormatPairs& getAudioFormatPairs() {
+    static const detail::AudioFormatPairs pairs = {{
+            {AUDIO_FORMAT_INVALID,
+             make_AudioFormatDescription(AudioFormatType::SYS_RESERVED_INVALID)},
+            {AUDIO_FORMAT_DEFAULT, AudioFormatDescription{}},
+            {AUDIO_FORMAT_PCM_16_BIT, make_AudioFormatDescription(PcmType::INT_16_BIT)},
+            {AUDIO_FORMAT_PCM_8_BIT, make_AudioFormatDescription(PcmType::UINT_8_BIT)},
+            {AUDIO_FORMAT_PCM_32_BIT, make_AudioFormatDescription(PcmType::INT_32_BIT)},
+            {AUDIO_FORMAT_PCM_8_24_BIT, make_AudioFormatDescription(PcmType::FIXED_Q_8_24)},
+            {AUDIO_FORMAT_PCM_FLOAT, make_AudioFormatDescription(PcmType::FLOAT_32_BIT)},
+            {AUDIO_FORMAT_PCM_24_BIT_PACKED, make_AudioFormatDescription(PcmType::INT_24_BIT)},
+            {AUDIO_FORMAT_MP3, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_MPEG)},
+            {AUDIO_FORMAT_AMR_NB,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AMR_NB)},
+            {AUDIO_FORMAT_AMR_WB,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AMR_WB)},
+            {AUDIO_FORMAT_AAC,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_MP4)},
+            {AUDIO_FORMAT_AAC_MAIN,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_MAIN)},
+            {AUDIO_FORMAT_AAC_LC,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_LC)},
+            {AUDIO_FORMAT_AAC_SSR,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_SSR)},
+            {AUDIO_FORMAT_AAC_LTP,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_LTP)},
+            {AUDIO_FORMAT_AAC_HE_V1,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_HE_V1)},
+            {AUDIO_FORMAT_AAC_SCALABLE,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_SCALABLE)},
+            {AUDIO_FORMAT_AAC_ERLC,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ERLC)},
+            {AUDIO_FORMAT_AAC_LD,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_LD)},
+            {AUDIO_FORMAT_AAC_HE_V2,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_HE_V2)},
+            {AUDIO_FORMAT_AAC_ELD,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ELD)},
+            {AUDIO_FORMAT_AAC_XHE,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_XHE)
+
+            },
+            // AUDIO_FORMAT_HE_AAC_V1 and HE_AAC_V2 are removed since they were deprecated long time
+            // ago.
+            {AUDIO_FORMAT_VORBIS,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_VORBIS)},
+            {AUDIO_FORMAT_OPUS, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_OPUS)},
+            {AUDIO_FORMAT_AC3, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AC3)},
+            {AUDIO_FORMAT_E_AC3, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_EAC3)},
+            {AUDIO_FORMAT_E_AC3_JOC,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_EAC3_JOC)},
+            {AUDIO_FORMAT_DTS, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DTS)},
+            {AUDIO_FORMAT_DTS_HD,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DTS_HD)},
+            {AUDIO_FORMAT_DTS_HD_MA,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DTS_HD_MA)},
+            {AUDIO_FORMAT_DTS_UHD,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DTS_UHD_P1)},
+            {AUDIO_FORMAT_DTS_UHD_P2,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DTS_UHD_P2)},
+            // In the future, we would like to represent encapsulated bitstreams as
+            // nested AudioFormatDescriptions. The legacy 'AUDIO_FORMAT_IEC61937' type doesn't
+            // specify the format of the encapsulated bitstream.
+            {AUDIO_FORMAT_IEC61937,
+             make_AudioFormatDescription(PcmType::INT_16_BIT,
+                                         ::android::MEDIA_MIMETYPE_AUDIO_IEC61937)},
+            {AUDIO_FORMAT_DOLBY_TRUEHD,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DOLBY_TRUEHD)},
+            {AUDIO_FORMAT_EVRC, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_EVRC)},
+            {AUDIO_FORMAT_EVRCB,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_EVRCB)},
+            {AUDIO_FORMAT_EVRCWB,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_EVRCWB)},
+            {AUDIO_FORMAT_EVRCNW,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_EVRCNW)},
+            {AUDIO_FORMAT_AAC_ADIF,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADIF)},
+            {AUDIO_FORMAT_WMA, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_WMA)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_WMA_PRO, make_AudioFormatDescription("audio/x-ms-wma.pro")},
+            {AUDIO_FORMAT_AMR_WB_PLUS,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AMR_WB_PLUS)},
+            {AUDIO_FORMAT_MP2,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_II)},
+            {AUDIO_FORMAT_QCELP,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_QCELP)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_DSD, make_AudioFormatDescription("audio/vnd.sony.dsd")},
+            {AUDIO_FORMAT_FLAC, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_FLAC)},
+            {AUDIO_FORMAT_ALAC, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_ALAC)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_APE, make_AudioFormatDescription("audio/x-ape")},
+            {AUDIO_FORMAT_AAC_ADTS,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS)},
+            {AUDIO_FORMAT_AAC_ADTS_MAIN,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_MAIN)},
+            {AUDIO_FORMAT_AAC_ADTS_LC,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_LC)},
+            {AUDIO_FORMAT_AAC_ADTS_SSR,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_SSR)},
+            {AUDIO_FORMAT_AAC_ADTS_LTP,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_LTP)},
+            {AUDIO_FORMAT_AAC_ADTS_HE_V1,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_HE_V1)},
+            {AUDIO_FORMAT_AAC_ADTS_SCALABLE,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_SCALABLE)},
+            {AUDIO_FORMAT_AAC_ADTS_ERLC,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_ERLC)},
+            {AUDIO_FORMAT_AAC_ADTS_LD,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_LD)},
+            {AUDIO_FORMAT_AAC_ADTS_HE_V2,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_HE_V2)},
+            {AUDIO_FORMAT_AAC_ADTS_ELD,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_ELD)},
+            {AUDIO_FORMAT_AAC_ADTS_XHE,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_ADTS_XHE)},
+            {// Note: not in the IANA registry. "vnd.octel.sbc" is not BT SBC.
+             AUDIO_FORMAT_SBC, make_AudioFormatDescription("audio/x-sbc")},
+            {AUDIO_FORMAT_APTX, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_APTX)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_APTX_HD, make_AudioFormatDescription("audio/vnd.qcom.aptx.hd")},
+            {AUDIO_FORMAT_AC4, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AC4)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_LDAC, make_AudioFormatDescription("audio/vnd.sony.ldac")},
+            {AUDIO_FORMAT_MAT,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DOLBY_MAT)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_MAT_1_0,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DOLBY_MAT +
+                                         std::string(".1.0"))},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_MAT_2_0,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DOLBY_MAT +
+                                         std::string(".2.0"))},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_MAT_2_1,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DOLBY_MAT +
+                                         std::string(".2.1"))},
+            {AUDIO_FORMAT_AAC_LATM,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC)},
+            {AUDIO_FORMAT_AAC_LATM_LC,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_LATM_LC)},
+            {AUDIO_FORMAT_AAC_LATM_HE_V1,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_LATM_HE_V1)},
+            {AUDIO_FORMAT_AAC_LATM_HE_V2,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_AAC_LATM_HE_V2)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_CELT, make_AudioFormatDescription("audio/x-celt")},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_APTX_ADAPTIVE,
+             make_AudioFormatDescription("audio/vnd.qcom.aptx.adaptive")},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_LHDC, make_AudioFormatDescription("audio/vnd.savitech.lhdc")},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_LHDC_LL, make_AudioFormatDescription("audio/vnd.savitech.lhdc.ll")},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_APTX_TWSP, make_AudioFormatDescription("audio/vnd.qcom.aptx.twsp")},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_LC3, make_AudioFormatDescription("audio/x-lc3")},
+            {AUDIO_FORMAT_MPEGH,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_MPEGH_MHM1)},
+            {AUDIO_FORMAT_MPEGH_BL_L3,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_MPEGH_BL_L3)},
+            {AUDIO_FORMAT_MPEGH_BL_L4,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_MPEGH_BL_L4)},
+            {AUDIO_FORMAT_MPEGH_LC_L3,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_MPEGH_LC_L3)},
+            {AUDIO_FORMAT_MPEGH_LC_L4,
+             make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_MPEGH_LC_L4)},
+            {AUDIO_FORMAT_IEC60958,
+             make_AudioFormatDescription(PcmType::INT_24_BIT,
+                                         ::android::MEDIA_MIMETYPE_AUDIO_IEC60958)},
+            {AUDIO_FORMAT_DRA, make_AudioFormatDescription(::android::MEDIA_MIMETYPE_AUDIO_DRA)},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_APTX_ADAPTIVE_QLEA,
+             make_AudioFormatDescription("audio/vnd.qcom.aptx.adaptive.r3")},
+            {// Note: not in the IANA registry.
+             AUDIO_FORMAT_APTX_ADAPTIVE_R4,
+             make_AudioFormatDescription("audio/vnd.qcom.aptx.adaptive.r4")},
+    }};
+    return pairs;
+}
+
+template<typename S, typename T>
+std::map<S, T> make_DirectMap(const std::vector<std::pair<S, T>>& v) {
+    std::map<S, T> result(v.begin(), v.end());
+    LOG_ALWAYS_FATAL_IF(result.size() != v.size(), "Duplicate key elements detected");
+    return result;
+}
+
+template<typename S, typename T>
+std::map<S, T> make_DirectMap(
+        const std::vector<std::pair<S, T>>& v1, const std::vector<std::pair<S, T>>& v2) {
+    std::map<S, T> result(v1.begin(), v1.end());
+    LOG_ALWAYS_FATAL_IF(result.size() != v1.size(), "Duplicate key elements detected in v1");
+    result.insert(v2.begin(), v2.end());
+    LOG_ALWAYS_FATAL_IF(result.size() != v1.size() + v2.size(),
+            "Duplicate key elements detected in v1+v2");
+    return result;
+}
+
+template<typename S, typename T>
+std::map<T, S> make_ReverseMap(const std::vector<std::pair<S, T>>& v) {
+    std::map<T, S> result;
+    std::transform(v.begin(), v.end(), std::inserter(result, result.begin()),
+            [](const std::pair<S, T>& p) {
+                return std::make_pair(p.second, p.first);
+            });
+    LOG_ALWAYS_FATAL_IF(result.size() != v.size(), "Duplicate key elements detected");
+    return result;
+}
+
+}  // namespace
+
+audio_channel_mask_t aidl2legacy_AudioChannelLayout_layout_audio_channel_mask_t_bits(
+        int aidlLayout, bool isInput) {
+    auto& bitMapping = isInput ? getInAudioChannelBits() : getOutAudioChannelBits();
+    const int aidlLayoutInitial = aidlLayout; // for error message
+    audio_channel_mask_t legacy = AUDIO_CHANNEL_NONE;
+    for (const auto& bitPair : bitMapping) {
+        if ((aidlLayout & bitPair.second) == bitPair.second) {
+            legacy = static_cast<audio_channel_mask_t>(legacy | bitPair.first);
+            aidlLayout &= ~bitPair.second;
+            if (aidlLayout == 0) {
+                return legacy;
+            }
+        }
+    }
+    ALOGE("%s: aidl layout 0x%x contains bits 0x%x that have no match to legacy %s bits",
+            __func__, aidlLayoutInitial, aidlLayout, isInput ? "input" : "output");
+    return AUDIO_CHANNEL_NONE;
+}
+
+ConversionResult<audio_channel_mask_t> aidl2legacy_AudioChannelLayout_audio_channel_mask_t(
+        const AudioChannelLayout& aidl, bool isInput) {
+    using ReverseMap = std::map<AudioChannelLayout, audio_channel_mask_t>;
+    using Tag = AudioChannelLayout::Tag;
+    static const ReverseMap mIn = make_ReverseMap(getInAudioChannelPairs());
+    static const ReverseMap mOut = make_ReverseMap(getOutAudioChannelPairs());
+    static const ReverseMap mVoice = make_ReverseMap(getVoiceAudioChannelPairs());
+
+    auto convert = [](const AudioChannelLayout& aidl, const ReverseMap& m,
+            const char* func, const char* type) -> ConversionResult<audio_channel_mask_t> {
+        if (auto it = m.find(aidl); it != m.end()) {
+            return it->second;
+        } else {
+            ALOGW("%s: no legacy %s audio_channel_mask_t found for %s", func, type,
+                    aidl.toString().c_str());
+            return unexpected(BAD_VALUE);
+        }
+    };
+
+    switch (aidl.getTag()) {
+        case Tag::none:
+            return AUDIO_CHANNEL_NONE;
+        case Tag::invalid:
+            return AUDIO_CHANNEL_INVALID;
+        case Tag::indexMask:
+            // Index masks do not have pre-defined values.
+            if (const int bits = aidl.get<Tag::indexMask>();
+                    __builtin_popcount(bits) != 0 &&
+                    __builtin_popcount(bits) <= AUDIO_CHANNEL_COUNT_MAX) {
+                return audio_channel_mask_from_representation_and_bits(
+                        AUDIO_CHANNEL_REPRESENTATION_INDEX, bits);
+            } else {
+                ALOGE("%s: invalid indexMask value 0x%x in %s",
+                        __func__, bits, aidl.toString().c_str());
+                return unexpected(BAD_VALUE);
+            }
+        case Tag::layoutMask:
+            // The fast path is to find a direct match for some known layout mask.
+            if (const auto layoutMatch = convert(aidl, isInput ? mIn : mOut, __func__,
+                    isInput ? "input" : "output");
+                    layoutMatch.ok()) {
+                return layoutMatch;
+            }
+            // If a match for a predefined layout wasn't found, make a custom one from bits.
+            if (audio_channel_mask_t bitMask =
+                    aidl2legacy_AudioChannelLayout_layout_audio_channel_mask_t_bits(
+                            aidl.get<Tag::layoutMask>(), isInput);
+                    bitMask != AUDIO_CHANNEL_NONE) {
+                return bitMask;
+            }
+            return unexpected(BAD_VALUE);
+        case Tag::voiceMask:
+            return convert(aidl, mVoice, __func__, "voice");
+    }
+    ALOGE("%s: unexpected tag value %d", __func__, aidl.getTag());
+    return unexpected(BAD_VALUE);
+}
+
+int legacy2aidl_audio_channel_mask_t_bits_AudioChannelLayout_layout(
+        audio_channel_mask_t legacy, bool isInput) {
+    auto& bitMapping = isInput ? getInAudioChannelBits() : getOutAudioChannelBits();
+    const int legacyInitial = legacy; // for error message
+    int aidlLayout = 0;
+    for (const auto& bitPair : bitMapping) {
+        if ((legacy & bitPair.first) == bitPair.first) {
+            aidlLayout |= bitPair.second;
+            legacy = static_cast<audio_channel_mask_t>(legacy & ~bitPair.first);
+            if (legacy == 0) {
+                return aidlLayout;
+            }
+        }
+    }
+    ALOGE("%s: legacy %s audio_channel_mask_t 0x%x contains unrecognized bits 0x%x",
+            __func__, isInput ? "input" : "output", legacyInitial, legacy);
+    return 0;
+}
+
+ConversionResult<AudioChannelLayout> legacy2aidl_audio_channel_mask_t_AudioChannelLayout(
+        audio_channel_mask_t legacy, bool isInput) {
+    using DirectMap = std::map<audio_channel_mask_t, AudioChannelLayout>;
+    using Tag = AudioChannelLayout::Tag;
+    static const DirectMap mInAndVoice = make_DirectMap(
+            getInAudioChannelPairs(), getVoiceAudioChannelPairs());
+    static const DirectMap mOut = make_DirectMap(getOutAudioChannelPairs());
+
+    auto convert = [](const audio_channel_mask_t legacy, const DirectMap& m,
+            const char* func, const char* type) -> ConversionResult<AudioChannelLayout> {
+        if (auto it = m.find(legacy); it != m.end()) {
+            return it->second;
+        } else {
+            ALOGW("%s: no AudioChannelLayout found for legacy %s audio_channel_mask_t value 0x%x",
+                    func, type, legacy);
+            return unexpected(BAD_VALUE);
+        }
+    };
+
+    if (legacy == AUDIO_CHANNEL_NONE) {
+        return AudioChannelLayout{};
+    } else if (legacy == AUDIO_CHANNEL_INVALID) {
+        return AudioChannelLayout::make<Tag::invalid>(0);
+    }
+
+    const audio_channel_representation_t repr = audio_channel_mask_get_representation(legacy);
+    if (repr == AUDIO_CHANNEL_REPRESENTATION_INDEX) {
+        if (audio_channel_mask_is_valid(legacy)) {
+            const int indexMask = VALUE_OR_RETURN(
+                    convertIntegral<int>(audio_channel_mask_get_bits(legacy)));
+            return AudioChannelLayout::make<Tag::indexMask>(indexMask);
+        } else {
+            ALOGE("%s: legacy audio_channel_mask_t value 0x%x is invalid", __func__, legacy);
+            return unexpected(BAD_VALUE);
+        }
+    } else if (repr == AUDIO_CHANNEL_REPRESENTATION_POSITION) {
+        // The fast path is to find a direct match for some known layout mask.
+        if (const auto layoutMatch = convert(legacy, isInput ? mInAndVoice : mOut, __func__,
+                isInput ? "input / voice" : "output");
+                layoutMatch.ok()) {
+            return layoutMatch;
+        }
+        // If a match for a predefined layout wasn't found, make a custom one from bits,
+        // rejecting those with voice channel bits.
+        if (!isInput ||
+                (legacy & (AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK)) == 0) {
+            if (int bitMaskLayout =
+                    legacy2aidl_audio_channel_mask_t_bits_AudioChannelLayout_layout(
+                            legacy, isInput);
+                    bitMaskLayout != 0) {
+                return AudioChannelLayout::make<Tag::layoutMask>(bitMaskLayout);
+            }
+        } else {
+            ALOGE("%s: legacy audio_channel_mask_t value 0x%x contains voice bits",
+                    __func__, legacy);
+        }
+        return unexpected(BAD_VALUE);
+    }
+
+    ALOGE("%s: unknown representation %d in audio_channel_mask_t value 0x%x",
+            __func__, repr, legacy);
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_devices_t> aidl2legacy_AudioDeviceDescription_audio_devices_t(
+        const AudioDeviceDescription& aidl) {
+    static const std::map<AudioDeviceDescription, audio_devices_t> m =
+            make_ReverseMap(getAudioDevicePairs());
+    if (auto it = m.find(aidl); it != m.end()) {
+        return it->second;
+    } else {
+        ALOGE("%s: no legacy audio_devices_t found for %s", __func__, aidl.toString().c_str());
+        return unexpected(BAD_VALUE);
+    }
+}
+
+ConversionResult<AudioDeviceDescription> legacy2aidl_audio_devices_t_AudioDeviceDescription(
+        audio_devices_t legacy) {
+    static const std::map<audio_devices_t, AudioDeviceDescription> m =
+            make_DirectMap(getAudioDevicePairs());
+    if (auto it = m.find(legacy); it != m.end()) {
+        return it->second;
+    } else {
+        ALOGE("%s: no AudioDeviceDescription found for legacy audio_devices_t value 0x%x",
+                __func__, legacy);
+        return unexpected(BAD_VALUE);
+    }
+}
+
+::android::status_t aidl2legacy_AudioDevice_audio_device(
+        const AudioDevice& aidl,
+        audio_devices_t* legacyType, char* legacyAddress) {
+    *legacyType = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_AudioDeviceDescription_audio_devices_t(aidl.type));
+    return aidl2legacy_string(
+                    aidl.address.get<AudioDeviceAddress::id>(),
+                    legacyAddress, AUDIO_DEVICE_MAX_ADDRESS_LEN);
+}
+
+::android::status_t aidl2legacy_AudioDevice_audio_device(
+        const AudioDevice& aidl,
+        audio_devices_t* legacyType, String8* legacyAddress) {
+    *legacyType = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_AudioDeviceDescription_audio_devices_t(aidl.type));
+    *legacyAddress = VALUE_OR_RETURN_STATUS(aidl2legacy_string_view_String8(
+                    aidl.address.get<AudioDeviceAddress::id>()));
+    return OK;
+}
+
+::android::status_t aidl2legacy_AudioDevice_audio_device(
+        const AudioDevice& aidl,
+        audio_devices_t* legacyType, std::string* legacyAddress) {
+    *legacyType = VALUE_OR_RETURN_STATUS(
+            aidl2legacy_AudioDeviceDescription_audio_devices_t(aidl.type));
+    *legacyAddress = aidl.address.get<AudioDeviceAddress::id>();
+    return OK;
+}
+
+ConversionResult<AudioDevice> legacy2aidl_audio_device_AudioDevice(
+        audio_devices_t legacyType, const char* legacyAddress) {
+    AudioDevice aidl;
+    aidl.type = VALUE_OR_RETURN(
+            legacy2aidl_audio_devices_t_AudioDeviceDescription(legacyType));
+    const std::string aidl_id = VALUE_OR_RETURN(
+            legacy2aidl_string(legacyAddress, AUDIO_DEVICE_MAX_ADDRESS_LEN));
+    aidl.address = AudioDeviceAddress::make<AudioDeviceAddress::id>(aidl_id);
+    return aidl;
+}
+
+ConversionResult<AudioDevice>
+legacy2aidl_audio_device_AudioDevice(
+        audio_devices_t legacyType, const String8& legacyAddress) {
+    AudioDevice aidl;
+    aidl.type = VALUE_OR_RETURN(
+            legacy2aidl_audio_devices_t_AudioDeviceDescription(legacyType));
+    const std::string aidl_id = VALUE_OR_RETURN(
+            legacy2aidl_String8_string(legacyAddress));
+    aidl.address = AudioDeviceAddress::make<AudioDeviceAddress::id>(aidl_id);
+    return aidl;
+}
+
+ConversionResult<audio_format_t> aidl2legacy_AudioFormatDescription_audio_format_t(
+        const AudioFormatDescription& aidl) {
+    static const std::map<AudioFormatDescription, audio_format_t> m =
+            make_ReverseMap(getAudioFormatPairs());
+    if (auto it = m.find(aidl); it != m.end()) {
+        return it->second;
+    } else {
+        ALOGE("%s: no legacy audio_format_t found for %s", __func__, aidl.toString().c_str());
+        return unexpected(BAD_VALUE);
+    }
+}
+
+ConversionResult<AudioFormatDescription> legacy2aidl_audio_format_t_AudioFormatDescription(
+        audio_format_t legacy) {
+    static const std::map<audio_format_t, AudioFormatDescription> m =
+            make_DirectMap(getAudioFormatPairs());
+    if (auto it = m.find(legacy); it != m.end()) {
+        return it->second;
+    } else {
+        ALOGE("%s: no AudioFormatDescription found for legacy audio_format_t value 0x%x",
+                __func__, legacy);
+        return unexpected(BAD_VALUE);
+    }
+}
+
+ConversionResult<audio_gain_mode_t> aidl2legacy_AudioGainMode_audio_gain_mode_t(
+        AudioGainMode aidl) {
+    switch (aidl) {
+        case AudioGainMode::JOINT:
+            return AUDIO_GAIN_MODE_JOINT;
+        case AudioGainMode::CHANNELS:
+            return AUDIO_GAIN_MODE_CHANNELS;
+        case AudioGainMode::RAMP:
+            return AUDIO_GAIN_MODE_RAMP;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioGainMode> legacy2aidl_audio_gain_mode_t_AudioGainMode(
+        audio_gain_mode_t legacy) {
+    switch (legacy) {
+        case AUDIO_GAIN_MODE_JOINT:
+            return AudioGainMode::JOINT;
+        case AUDIO_GAIN_MODE_CHANNELS:
+            return AudioGainMode::CHANNELS;
+        case AUDIO_GAIN_MODE_RAMP:
+            return AudioGainMode::RAMP;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_gain_mode_t> aidl2legacy_int32_t_audio_gain_mode_t_mask(int32_t aidl) {
+    return convertBitmask<audio_gain_mode_t, int32_t, audio_gain_mode_t, AudioGainMode>(
+            aidl, aidl2legacy_AudioGainMode_audio_gain_mode_t,
+            // AudioGainMode is index-based.
+            indexToEnum_index<AudioGainMode>,
+            // AUDIO_GAIN_MODE_* constants are mask-based.
+            enumToMask_bitmask<audio_gain_mode_t, audio_gain_mode_t>);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_gain_mode_t_int32_t_mask(audio_gain_mode_t legacy) {
+    return convertBitmask<int32_t, audio_gain_mode_t, AudioGainMode, audio_gain_mode_t>(
+            legacy, legacy2aidl_audio_gain_mode_t_AudioGainMode,
+            // AUDIO_GAIN_MODE_* constants are mask-based.
+            indexToEnum_bitmask<audio_gain_mode_t>,
+            // AudioGainMode is index-based.
+            enumToMask_index<int32_t, AudioGainMode>);
+}
+
+ConversionResult<audio_gain_config> aidl2legacy_AudioGainConfig_audio_gain_config(
+        const AudioGainConfig& aidl, bool isInput) {
+    audio_gain_config legacy;
+    legacy.index = VALUE_OR_RETURN(convertIntegral<int>(aidl.index));
+    legacy.mode = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_gain_mode_t_mask(aidl.mode));
+    legacy.channel_mask = VALUE_OR_RETURN(
+            aidl2legacy_AudioChannelLayout_audio_channel_mask_t(aidl.channelMask, isInput));
+    const bool isJoint = bitmaskIsSet(aidl.mode, AudioGainMode::JOINT);
+    size_t numValues = isJoint ? 1
+                               : isInput ? audio_channel_count_from_in_mask(legacy.channel_mask)
+                                         : audio_channel_count_from_out_mask(legacy.channel_mask);
+    if (aidl.values.size() != numValues || aidl.values.size() > std::size(legacy.values)) {
+        return unexpected(BAD_VALUE);
+    }
+    for (size_t i = 0; i < numValues; ++i) {
+        legacy.values[i] = VALUE_OR_RETURN(convertIntegral<int>(aidl.values[i]));
+    }
+    legacy.ramp_duration_ms = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.rampDurationMs));
+    return legacy;
+}
+
+ConversionResult<AudioGainConfig> legacy2aidl_audio_gain_config_AudioGainConfig(
+        const audio_gain_config& legacy, bool isInput) {
+    AudioGainConfig aidl;
+    aidl.index = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.index));
+    aidl.mode = VALUE_OR_RETURN(legacy2aidl_audio_gain_mode_t_int32_t_mask(legacy.mode));
+    aidl.channelMask = VALUE_OR_RETURN(
+            legacy2aidl_audio_channel_mask_t_AudioChannelLayout(legacy.channel_mask, isInput));
+    const bool isJoint = (legacy.mode & AUDIO_GAIN_MODE_JOINT) != 0;
+    size_t numValues = isJoint ? 1
+                               : isInput ? audio_channel_count_from_in_mask(legacy.channel_mask)
+                                         : audio_channel_count_from_out_mask(legacy.channel_mask);
+    aidl.values.resize(numValues);
+    for (size_t i = 0; i < numValues; ++i) {
+        aidl.values[i] = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.values[i]));
+    }
+    aidl.rampDurationMs = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.ramp_duration_ms));
+    return aidl;
+}
+
+ConversionResult<audio_input_flags_t> aidl2legacy_AudioInputFlags_audio_input_flags_t(
+        AudioInputFlags aidl) {
+    switch (aidl) {
+        case AudioInputFlags::FAST:
+            return AUDIO_INPUT_FLAG_FAST;
+        case AudioInputFlags::HW_HOTWORD:
+            return AUDIO_INPUT_FLAG_HW_HOTWORD;
+        case AudioInputFlags::RAW:
+            return AUDIO_INPUT_FLAG_RAW;
+        case AudioInputFlags::SYNC:
+            return AUDIO_INPUT_FLAG_SYNC;
+        case AudioInputFlags::MMAP_NOIRQ:
+            return AUDIO_INPUT_FLAG_MMAP_NOIRQ;
+        case AudioInputFlags::VOIP_TX:
+            return AUDIO_INPUT_FLAG_VOIP_TX;
+        case AudioInputFlags::HW_AV_SYNC:
+            return AUDIO_INPUT_FLAG_HW_AV_SYNC;
+        case AudioInputFlags::DIRECT:
+            return AUDIO_INPUT_FLAG_DIRECT;
+        case AudioInputFlags::ULTRASOUND:
+            return AUDIO_INPUT_FLAG_ULTRASOUND;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioInputFlags> legacy2aidl_audio_input_flags_t_AudioInputFlags(
+        audio_input_flags_t legacy) {
+    switch (legacy) {
+        case AUDIO_INPUT_FLAG_NONE:
+            break; // shouldn't get here. must be listed  -Werror,-Wswitch
+        case AUDIO_INPUT_FLAG_FAST:
+            return AudioInputFlags::FAST;
+        case AUDIO_INPUT_FLAG_HW_HOTWORD:
+            return AudioInputFlags::HW_HOTWORD;
+        case AUDIO_INPUT_FLAG_RAW:
+            return AudioInputFlags::RAW;
+        case AUDIO_INPUT_FLAG_SYNC:
+            return AudioInputFlags::SYNC;
+        case AUDIO_INPUT_FLAG_MMAP_NOIRQ:
+            return AudioInputFlags::MMAP_NOIRQ;
+        case AUDIO_INPUT_FLAG_VOIP_TX:
+            return AudioInputFlags::VOIP_TX;
+        case AUDIO_INPUT_FLAG_HW_AV_SYNC:
+            return AudioInputFlags::HW_AV_SYNC;
+        case AUDIO_INPUT_FLAG_DIRECT:
+            return AudioInputFlags::DIRECT;
+        case AUDIO_INPUT_FLAG_ULTRASOUND:
+            return AudioInputFlags::ULTRASOUND;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_output_flags_t> aidl2legacy_AudioOutputFlags_audio_output_flags_t(
+        AudioOutputFlags aidl) {
+    switch (aidl) {
+        case AudioOutputFlags::DIRECT:
+            return AUDIO_OUTPUT_FLAG_DIRECT;
+        case AudioOutputFlags::PRIMARY:
+            return AUDIO_OUTPUT_FLAG_PRIMARY;
+        case AudioOutputFlags::FAST:
+            return AUDIO_OUTPUT_FLAG_FAST;
+        case AudioOutputFlags::DEEP_BUFFER:
+            return AUDIO_OUTPUT_FLAG_DEEP_BUFFER;
+        case AudioOutputFlags::COMPRESS_OFFLOAD:
+            return AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD;
+        case AudioOutputFlags::NON_BLOCKING:
+            return AUDIO_OUTPUT_FLAG_NON_BLOCKING;
+        case AudioOutputFlags::HW_AV_SYNC:
+            return AUDIO_OUTPUT_FLAG_HW_AV_SYNC;
+        case AudioOutputFlags::TTS:
+            return AUDIO_OUTPUT_FLAG_TTS;
+        case AudioOutputFlags::RAW:
+            return AUDIO_OUTPUT_FLAG_RAW;
+        case AudioOutputFlags::SYNC:
+            return AUDIO_OUTPUT_FLAG_SYNC;
+        case AudioOutputFlags::IEC958_NONAUDIO:
+            return AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO;
+        case AudioOutputFlags::DIRECT_PCM:
+            return AUDIO_OUTPUT_FLAG_DIRECT_PCM;
+        case AudioOutputFlags::MMAP_NOIRQ:
+            return AUDIO_OUTPUT_FLAG_MMAP_NOIRQ;
+        case AudioOutputFlags::VOIP_RX:
+            return AUDIO_OUTPUT_FLAG_VOIP_RX;
+        case AudioOutputFlags::INCALL_MUSIC:
+            return AUDIO_OUTPUT_FLAG_INCALL_MUSIC;
+        case AudioOutputFlags::GAPLESS_OFFLOAD:
+            return AUDIO_OUTPUT_FLAG_GAPLESS_OFFLOAD;
+        case AudioOutputFlags::ULTRASOUND:
+            return AUDIO_OUTPUT_FLAG_ULTRASOUND;
+        case AudioOutputFlags::SPATIALIZER:
+            return AUDIO_OUTPUT_FLAG_SPATIALIZER;
+        case AudioOutputFlags::BIT_PERFECT:
+            return AUDIO_OUTPUT_FLAG_BIT_PERFECT;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioOutputFlags> legacy2aidl_audio_output_flags_t_AudioOutputFlags(
+        audio_output_flags_t legacy) {
+    switch (legacy) {
+        case AUDIO_OUTPUT_FLAG_NONE:
+            break; // shouldn't get here. must be listed  -Werror,-Wswitch
+        case AUDIO_OUTPUT_FLAG_DIRECT:
+            return AudioOutputFlags::DIRECT;
+        case AUDIO_OUTPUT_FLAG_PRIMARY:
+            return AudioOutputFlags::PRIMARY;
+        case AUDIO_OUTPUT_FLAG_FAST:
+            return AudioOutputFlags::FAST;
+        case AUDIO_OUTPUT_FLAG_DEEP_BUFFER:
+            return AudioOutputFlags::DEEP_BUFFER;
+        case AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD:
+            return AudioOutputFlags::COMPRESS_OFFLOAD;
+        case AUDIO_OUTPUT_FLAG_NON_BLOCKING:
+            return AudioOutputFlags::NON_BLOCKING;
+        case AUDIO_OUTPUT_FLAG_HW_AV_SYNC:
+            return AudioOutputFlags::HW_AV_SYNC;
+        case AUDIO_OUTPUT_FLAG_TTS:
+            return AudioOutputFlags::TTS;
+        case AUDIO_OUTPUT_FLAG_RAW:
+            return AudioOutputFlags::RAW;
+        case AUDIO_OUTPUT_FLAG_SYNC:
+            return AudioOutputFlags::SYNC;
+        case AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO:
+            return AudioOutputFlags::IEC958_NONAUDIO;
+        case AUDIO_OUTPUT_FLAG_DIRECT_PCM:
+            return AudioOutputFlags::DIRECT_PCM;
+        case AUDIO_OUTPUT_FLAG_MMAP_NOIRQ:
+            return AudioOutputFlags::MMAP_NOIRQ;
+        case AUDIO_OUTPUT_FLAG_VOIP_RX:
+            return AudioOutputFlags::VOIP_RX;
+        case AUDIO_OUTPUT_FLAG_INCALL_MUSIC:
+            return AudioOutputFlags::INCALL_MUSIC;
+        case AUDIO_OUTPUT_FLAG_GAPLESS_OFFLOAD:
+            return AudioOutputFlags::GAPLESS_OFFLOAD;
+        case AUDIO_OUTPUT_FLAG_ULTRASOUND:
+            return AudioOutputFlags::ULTRASOUND;
+        case AUDIO_OUTPUT_FLAG_SPATIALIZER:
+            return AudioOutputFlags::SPATIALIZER;
+        case AUDIO_OUTPUT_FLAG_BIT_PERFECT:
+            return AudioOutputFlags::BIT_PERFECT;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_input_flags_t> aidl2legacy_int32_t_audio_input_flags_t_mask(
+        int32_t aidl) {
+    using LegacyMask = std::underlying_type_t<audio_input_flags_t>;
+
+    LegacyMask converted = VALUE_OR_RETURN(
+            (convertBitmask<LegacyMask, int32_t, audio_input_flags_t, AudioInputFlags>(
+                    aidl, aidl2legacy_AudioInputFlags_audio_input_flags_t,
+                    indexToEnum_index<AudioInputFlags>,
+                    enumToMask_bitmask<LegacyMask, audio_input_flags_t>)));
+    return static_cast<audio_input_flags_t>(converted);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_input_flags_t_int32_t_mask(
+        audio_input_flags_t legacy) {
+    using LegacyMask = std::underlying_type_t<audio_input_flags_t>;
+
+    LegacyMask legacyMask = static_cast<LegacyMask>(legacy);
+    return convertBitmask<int32_t, LegacyMask, AudioInputFlags, audio_input_flags_t>(
+            legacyMask, legacy2aidl_audio_input_flags_t_AudioInputFlags,
+            indexToEnum_bitmask<audio_input_flags_t>,
+            enumToMask_index<int32_t, AudioInputFlags>);
+}
+
+ConversionResult<audio_output_flags_t> aidl2legacy_int32_t_audio_output_flags_t_mask(
+        int32_t aidl) {
+    return convertBitmask<audio_output_flags_t,
+            int32_t,
+            audio_output_flags_t,
+            AudioOutputFlags>(
+            aidl, aidl2legacy_AudioOutputFlags_audio_output_flags_t,
+            indexToEnum_index<AudioOutputFlags>,
+            enumToMask_bitmask<audio_output_flags_t, audio_output_flags_t>);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_output_flags_t_int32_t_mask(
+        audio_output_flags_t legacy) {
+    using LegacyMask = std::underlying_type_t<audio_output_flags_t>;
+
+    LegacyMask legacyMask = static_cast<LegacyMask>(legacy);
+    return convertBitmask<int32_t, LegacyMask, AudioOutputFlags, audio_output_flags_t>(
+            legacyMask, legacy2aidl_audio_output_flags_t_AudioOutputFlags,
+            indexToEnum_bitmask<audio_output_flags_t>,
+            enumToMask_index<int32_t, AudioOutputFlags>);
+}
+
+ConversionResult<audio_io_flags> aidl2legacy_AudioIoFlags_audio_io_flags(
+        const AudioIoFlags& aidl, bool isInput) {
+    audio_io_flags legacy;
+    if (isInput) {
+        legacy.input = VALUE_OR_RETURN(
+                aidl2legacy_int32_t_audio_input_flags_t_mask(
+                        VALUE_OR_RETURN(UNION_GET(aidl, input))));
+    } else {
+        legacy.output = VALUE_OR_RETURN(
+                aidl2legacy_int32_t_audio_output_flags_t_mask(
+                        VALUE_OR_RETURN(UNION_GET(aidl, output))));
+    }
+    return legacy;
+}
+
+ConversionResult<AudioIoFlags> legacy2aidl_audio_io_flags_AudioIoFlags(
+        const audio_io_flags& legacy, bool isInput) {
+    AudioIoFlags aidl;
+    if (isInput) {
+        UNION_SET(aidl, input,
+                VALUE_OR_RETURN(legacy2aidl_audio_input_flags_t_int32_t_mask(legacy.input)));
+    } else {
+        UNION_SET(aidl, output,
+                VALUE_OR_RETURN(legacy2aidl_audio_output_flags_t_int32_t_mask(legacy.output)));
+    }
+    return aidl;
+}
+
+ConversionResult<audio_stream_type_t> aidl2legacy_AudioStreamType_audio_stream_type_t(
+        AudioStreamType aidl) {
+    switch (aidl) {
+        case AudioStreamType::INVALID:
+            break;  // return error
+        case AudioStreamType::SYS_RESERVED_DEFAULT:
+            return AUDIO_STREAM_DEFAULT;
+        case AudioStreamType::VOICE_CALL:
+            return AUDIO_STREAM_VOICE_CALL;
+        case AudioStreamType::SYSTEM:
+            return AUDIO_STREAM_SYSTEM;
+        case AudioStreamType::RING:
+            return AUDIO_STREAM_RING;
+        case AudioStreamType::MUSIC:
+            return AUDIO_STREAM_MUSIC;
+        case AudioStreamType::ALARM:
+            return AUDIO_STREAM_ALARM;
+        case AudioStreamType::NOTIFICATION:
+            return AUDIO_STREAM_NOTIFICATION;
+        case AudioStreamType::BLUETOOTH_SCO:
+            return AUDIO_STREAM_BLUETOOTH_SCO;
+        case AudioStreamType::ENFORCED_AUDIBLE:
+            return AUDIO_STREAM_ENFORCED_AUDIBLE;
+        case AudioStreamType::DTMF:
+            return AUDIO_STREAM_DTMF;
+        case AudioStreamType::TTS:
+            return AUDIO_STREAM_TTS;
+        case AudioStreamType::ACCESSIBILITY:
+            return AUDIO_STREAM_ACCESSIBILITY;
+        case AudioStreamType::ASSISTANT:
+            return AUDIO_STREAM_ASSISTANT;
+        case AudioStreamType::SYS_RESERVED_REROUTING:
+            return AUDIO_STREAM_REROUTING;
+        case AudioStreamType::SYS_RESERVED_PATCH:
+            return AUDIO_STREAM_PATCH;
+        case AudioStreamType::CALL_ASSISTANT:
+            return AUDIO_STREAM_CALL_ASSISTANT;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioStreamType> legacy2aidl_audio_stream_type_t_AudioStreamType(
+        audio_stream_type_t legacy) {
+    switch (legacy) {
+        case AUDIO_STREAM_DEFAULT:
+            return AudioStreamType::SYS_RESERVED_DEFAULT;
+        case AUDIO_STREAM_VOICE_CALL:
+            return AudioStreamType::VOICE_CALL;
+        case AUDIO_STREAM_SYSTEM:
+            return AudioStreamType::SYSTEM;
+        case AUDIO_STREAM_RING:
+            return AudioStreamType::RING;
+        case AUDIO_STREAM_MUSIC:
+            return AudioStreamType::MUSIC;
+        case AUDIO_STREAM_ALARM:
+            return AudioStreamType::ALARM;
+        case AUDIO_STREAM_NOTIFICATION:
+            return AudioStreamType::NOTIFICATION;
+        case AUDIO_STREAM_BLUETOOTH_SCO:
+            return AudioStreamType::BLUETOOTH_SCO;
+        case AUDIO_STREAM_ENFORCED_AUDIBLE:
+            return AudioStreamType::ENFORCED_AUDIBLE;
+        case AUDIO_STREAM_DTMF:
+            return AudioStreamType::DTMF;
+        case AUDIO_STREAM_TTS:
+            return AudioStreamType::TTS;
+        case AUDIO_STREAM_ACCESSIBILITY:
+            return AudioStreamType::ACCESSIBILITY;
+        case AUDIO_STREAM_ASSISTANT:
+            return AudioStreamType::ASSISTANT;
+        case AUDIO_STREAM_REROUTING:
+            return AudioStreamType::SYS_RESERVED_REROUTING;
+        case AUDIO_STREAM_PATCH:
+            return AudioStreamType::SYS_RESERVED_PATCH;
+        case AUDIO_STREAM_CALL_ASSISTANT:
+            return AudioStreamType::CALL_ASSISTANT;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_source_t> aidl2legacy_AudioSource_audio_source_t(
+        AudioSource aidl) {
+    switch (aidl) {
+        case AudioSource::SYS_RESERVED_INVALID:
+            return AUDIO_SOURCE_INVALID;
+        case AudioSource::DEFAULT:
+            return AUDIO_SOURCE_DEFAULT;
+        case AudioSource::MIC:
+            return AUDIO_SOURCE_MIC;
+        case AudioSource::VOICE_UPLINK:
+            return AUDIO_SOURCE_VOICE_UPLINK;
+        case AudioSource::VOICE_DOWNLINK:
+            return AUDIO_SOURCE_VOICE_DOWNLINK;
+        case AudioSource::VOICE_CALL:
+            return AUDIO_SOURCE_VOICE_CALL;
+        case AudioSource::CAMCORDER:
+            return AUDIO_SOURCE_CAMCORDER;
+        case AudioSource::VOICE_RECOGNITION:
+            return AUDIO_SOURCE_VOICE_RECOGNITION;
+        case AudioSource::VOICE_COMMUNICATION:
+            return AUDIO_SOURCE_VOICE_COMMUNICATION;
+        case AudioSource::REMOTE_SUBMIX:
+            return AUDIO_SOURCE_REMOTE_SUBMIX;
+        case AudioSource::UNPROCESSED:
+            return AUDIO_SOURCE_UNPROCESSED;
+        case AudioSource::VOICE_PERFORMANCE:
+            return AUDIO_SOURCE_VOICE_PERFORMANCE;
+        case AudioSource::ULTRASOUND:
+            return AUDIO_SOURCE_ULTRASOUND;
+        case AudioSource::ECHO_REFERENCE:
+            return AUDIO_SOURCE_ECHO_REFERENCE;
+        case AudioSource::FM_TUNER:
+            return AUDIO_SOURCE_FM_TUNER;
+        case AudioSource::HOTWORD:
+            return AUDIO_SOURCE_HOTWORD;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioSource> legacy2aidl_audio_source_t_AudioSource(
+        audio_source_t legacy) {
+    switch (legacy) {
+        case AUDIO_SOURCE_INVALID:
+            return AudioSource::SYS_RESERVED_INVALID;
+        case AUDIO_SOURCE_DEFAULT:
+            return AudioSource::DEFAULT;
+        case AUDIO_SOURCE_MIC:
+            return AudioSource::MIC;
+        case AUDIO_SOURCE_VOICE_UPLINK:
+            return AudioSource::VOICE_UPLINK;
+        case AUDIO_SOURCE_VOICE_DOWNLINK:
+            return AudioSource::VOICE_DOWNLINK;
+        case AUDIO_SOURCE_VOICE_CALL:
+            return AudioSource::VOICE_CALL;
+        case AUDIO_SOURCE_CAMCORDER:
+            return AudioSource::CAMCORDER;
+        case AUDIO_SOURCE_VOICE_RECOGNITION:
+            return AudioSource::VOICE_RECOGNITION;
+        case AUDIO_SOURCE_VOICE_COMMUNICATION:
+            return AudioSource::VOICE_COMMUNICATION;
+        case AUDIO_SOURCE_REMOTE_SUBMIX:
+            return AudioSource::REMOTE_SUBMIX;
+        case AUDIO_SOURCE_UNPROCESSED:
+            return AudioSource::UNPROCESSED;
+        case AUDIO_SOURCE_VOICE_PERFORMANCE:
+            return AudioSource::VOICE_PERFORMANCE;
+        case AUDIO_SOURCE_ULTRASOUND:
+            return AudioSource::ULTRASOUND;
+        case AUDIO_SOURCE_ECHO_REFERENCE:
+            return AudioSource::ECHO_REFERENCE;
+        case AUDIO_SOURCE_FM_TUNER:
+            return AudioSource::FM_TUNER;
+        case AUDIO_SOURCE_HOTWORD:
+            return AudioSource::HOTWORD;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_session_t> aidl2legacy_int32_t_audio_session_t(int32_t aidl) {
+    return convertReinterpret<audio_session_t>(aidl);
+}
+
+ConversionResult<int32_t> legacy2aidl_audio_session_t_int32_t(audio_session_t legacy) {
+    return convertReinterpret<int32_t>(legacy);
+}
+
+ConversionResult<audio_content_type_t>
+aidl2legacy_AudioContentType_audio_content_type_t(AudioContentType aidl) {
+    switch (aidl) {
+        case AudioContentType::UNKNOWN:
+            return AUDIO_CONTENT_TYPE_UNKNOWN;
+        case AudioContentType::SPEECH:
+            return AUDIO_CONTENT_TYPE_SPEECH;
+        case AudioContentType::MUSIC:
+            return AUDIO_CONTENT_TYPE_MUSIC;
+        case AudioContentType::MOVIE:
+            return AUDIO_CONTENT_TYPE_MOVIE;
+        case AudioContentType::SONIFICATION:
+            return AUDIO_CONTENT_TYPE_SONIFICATION;
+        case AudioContentType::ULTRASOUND:
+            return AUDIO_CONTENT_TYPE_ULTRASOUND;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioContentType>
+legacy2aidl_audio_content_type_t_AudioContentType(audio_content_type_t legacy) {
+    switch (legacy) {
+        case AUDIO_CONTENT_TYPE_UNKNOWN:
+            return AudioContentType::UNKNOWN;
+        case AUDIO_CONTENT_TYPE_SPEECH:
+            return AudioContentType::SPEECH;
+        case AUDIO_CONTENT_TYPE_MUSIC:
+            return AudioContentType::MUSIC;
+        case AUDIO_CONTENT_TYPE_MOVIE:
+            return AudioContentType::MOVIE;
+        case AUDIO_CONTENT_TYPE_SONIFICATION:
+            return AudioContentType::SONIFICATION;
+        case AUDIO_CONTENT_TYPE_ULTRASOUND:
+            return AudioContentType::ULTRASOUND;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_usage_t>
+aidl2legacy_AudioUsage_audio_usage_t(AudioUsage aidl) {
+    switch (aidl) {
+        case AudioUsage::INVALID:
+            break;  // return error
+        case AudioUsage::UNKNOWN:
+            return AUDIO_USAGE_UNKNOWN;
+        case AudioUsage::MEDIA:
+            return AUDIO_USAGE_MEDIA;
+        case AudioUsage::VOICE_COMMUNICATION:
+            return AUDIO_USAGE_VOICE_COMMUNICATION;
+        case AudioUsage::VOICE_COMMUNICATION_SIGNALLING:
+            return AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING;
+        case AudioUsage::ALARM:
+            return AUDIO_USAGE_ALARM;
+        case AudioUsage::NOTIFICATION:
+            return AUDIO_USAGE_NOTIFICATION;
+        case AudioUsage::NOTIFICATION_TELEPHONY_RINGTONE:
+            return AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE;
+        case AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_REQUEST:
+            return AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST;
+        case AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_INSTANT:
+            return AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT;
+        case AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_DELAYED:
+            return AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED;
+        case AudioUsage::NOTIFICATION_EVENT:
+            return AUDIO_USAGE_NOTIFICATION_EVENT;
+        case AudioUsage::ASSISTANCE_ACCESSIBILITY:
+            return AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY;
+        case AudioUsage::ASSISTANCE_NAVIGATION_GUIDANCE:
+            return AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE;
+        case AudioUsage::ASSISTANCE_SONIFICATION:
+            return AUDIO_USAGE_ASSISTANCE_SONIFICATION;
+        case AudioUsage::GAME:
+            return AUDIO_USAGE_GAME;
+        case AudioUsage::VIRTUAL_SOURCE:
+            return AUDIO_USAGE_VIRTUAL_SOURCE;
+        case AudioUsage::ASSISTANT:
+            return AUDIO_USAGE_ASSISTANT;
+        case AudioUsage::CALL_ASSISTANT:
+            return AUDIO_USAGE_CALL_ASSISTANT;
+        case AudioUsage::EMERGENCY:
+            return AUDIO_USAGE_EMERGENCY;
+        case AudioUsage::SAFETY:
+            return AUDIO_USAGE_SAFETY;
+        case AudioUsage::VEHICLE_STATUS:
+            return AUDIO_USAGE_VEHICLE_STATUS;
+        case AudioUsage::ANNOUNCEMENT:
+            return AUDIO_USAGE_ANNOUNCEMENT;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioUsage>
+legacy2aidl_audio_usage_t_AudioUsage(audio_usage_t legacy) {
+    switch (legacy) {
+        case AUDIO_USAGE_UNKNOWN:
+            return AudioUsage::UNKNOWN;
+        case AUDIO_USAGE_MEDIA:
+            return AudioUsage::MEDIA;
+        case AUDIO_USAGE_VOICE_COMMUNICATION:
+            return AudioUsage::VOICE_COMMUNICATION;
+        case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
+            return AudioUsage::VOICE_COMMUNICATION_SIGNALLING;
+        case AUDIO_USAGE_ALARM:
+            return AudioUsage::ALARM;
+        case AUDIO_USAGE_NOTIFICATION:
+            return AudioUsage::NOTIFICATION;
+        case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
+            return AudioUsage::NOTIFICATION_TELEPHONY_RINGTONE;
+        case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
+            return AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_REQUEST;
+        case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
+            return AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_INSTANT;
+        case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
+            return AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_DELAYED;
+        case AUDIO_USAGE_NOTIFICATION_EVENT:
+            return AudioUsage::NOTIFICATION_EVENT;
+        case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
+            return AudioUsage::ASSISTANCE_ACCESSIBILITY;
+        case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
+            return AudioUsage::ASSISTANCE_NAVIGATION_GUIDANCE;
+        case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
+            return AudioUsage::ASSISTANCE_SONIFICATION;
+        case AUDIO_USAGE_GAME:
+            return AudioUsage::GAME;
+        case AUDIO_USAGE_VIRTUAL_SOURCE:
+            return AudioUsage::VIRTUAL_SOURCE;
+        case AUDIO_USAGE_ASSISTANT:
+            return AudioUsage::ASSISTANT;
+        case AUDIO_USAGE_CALL_ASSISTANT:
+            return AudioUsage::CALL_ASSISTANT;
+        case AUDIO_USAGE_EMERGENCY:
+            return AudioUsage::EMERGENCY;
+        case AUDIO_USAGE_SAFETY:
+            return AudioUsage::SAFETY;
+        case AUDIO_USAGE_VEHICLE_STATUS:
+            return AudioUsage::VEHICLE_STATUS;
+        case AUDIO_USAGE_ANNOUNCEMENT:
+            return AudioUsage::ANNOUNCEMENT;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+
+ConversionResult<audio_encapsulation_mode_t>
+aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(AudioEncapsulationMode aidl) {
+    switch (aidl) {
+        case AudioEncapsulationMode::INVALID:
+            break;  // return error
+        case AudioEncapsulationMode::NONE:
+            return AUDIO_ENCAPSULATION_MODE_NONE;
+        case AudioEncapsulationMode::ELEMENTARY_STREAM:
+            return AUDIO_ENCAPSULATION_MODE_ELEMENTARY_STREAM;
+        case AudioEncapsulationMode::HANDLE:
+            return AUDIO_ENCAPSULATION_MODE_HANDLE;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioEncapsulationMode>
+legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(audio_encapsulation_mode_t legacy) {
+    switch (legacy) {
+        case AUDIO_ENCAPSULATION_MODE_NONE:
+            return AudioEncapsulationMode::NONE;
+        case AUDIO_ENCAPSULATION_MODE_ELEMENTARY_STREAM:
+            return AudioEncapsulationMode::ELEMENTARY_STREAM;
+        case AUDIO_ENCAPSULATION_MODE_HANDLE:
+            return AudioEncapsulationMode::HANDLE;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_offload_info_t>
+aidl2legacy_AudioOffloadInfo_audio_offload_info_t(const AudioOffloadInfo& aidl) {
+    audio_offload_info_t legacy = AUDIO_INFO_INITIALIZER;
+    audio_config_base_t base = VALUE_OR_RETURN(
+            aidl2legacy_AudioConfigBase_audio_config_base_t(aidl.base, false /*isInput*/));
+    legacy.sample_rate = base.sample_rate;
+    legacy.channel_mask = base.channel_mask;
+    legacy.format = base.format;
+    legacy.stream_type = VALUE_OR_RETURN(
+            aidl2legacy_AudioStreamType_audio_stream_type_t(aidl.streamType));
+    legacy.bit_rate = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.bitRatePerSecond));
+    legacy.duration_us = VALUE_OR_RETURN(convertIntegral<int64_t>(aidl.durationUs));
+    legacy.has_video = aidl.hasVideo;
+    legacy.is_streaming = aidl.isStreaming;
+    legacy.bit_width = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.bitWidth));
+    legacy.offload_buffer_size = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.offloadBufferSize));
+    legacy.usage = VALUE_OR_RETURN(aidl2legacy_AudioUsage_audio_usage_t(aidl.usage));
+    legacy.encapsulation_mode = VALUE_OR_RETURN(
+            aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(aidl.encapsulationMode));
+    legacy.content_id = VALUE_OR_RETURN(convertReinterpret<int32_t>(aidl.contentId));
+    legacy.sync_id = VALUE_OR_RETURN(convertReinterpret<int32_t>(aidl.syncId));
+    return legacy;
+}
+
+ConversionResult<AudioOffloadInfo>
+legacy2aidl_audio_offload_info_t_AudioOffloadInfo(const audio_offload_info_t& legacy) {
+    AudioOffloadInfo aidl;
+    // Version 0.1 fields.
+    if (legacy.size < offsetof(audio_offload_info_t, usage) + sizeof(audio_offload_info_t::usage)) {
+        return unexpected(BAD_VALUE);
+    }
+    const audio_config_base_t base = { .sample_rate = legacy.sample_rate,
+        .channel_mask = legacy.channel_mask, .format = legacy.format };
+    aidl.base = VALUE_OR_RETURN(legacy2aidl_audio_config_base_t_AudioConfigBase(
+                    base, false /*isInput*/));
+    aidl.streamType = VALUE_OR_RETURN(
+            legacy2aidl_audio_stream_type_t_AudioStreamType(legacy.stream_type));
+    aidl.bitRatePerSecond = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.bit_rate));
+    aidl.durationUs = VALUE_OR_RETURN(convertIntegral<int64_t>(legacy.duration_us));
+    aidl.hasVideo = legacy.has_video;
+    aidl.isStreaming = legacy.is_streaming;
+    aidl.bitWidth = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.bit_width));
+    aidl.offloadBufferSize = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.offload_buffer_size));
+    aidl.usage = VALUE_OR_RETURN(legacy2aidl_audio_usage_t_AudioUsage(legacy.usage));
+
+    // Version 0.2 fields.
+    if (legacy.version >= AUDIO_OFFLOAD_INFO_VERSION_0_2) {
+        if (legacy.size <
+            offsetof(audio_offload_info_t, sync_id) + sizeof(audio_offload_info_t::sync_id)) {
+            return unexpected(BAD_VALUE);
+        }
+        aidl.encapsulationMode = VALUE_OR_RETURN(
+                legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(
+                        legacy.encapsulation_mode));
+        aidl.contentId = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.content_id));
+        aidl.syncId = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.sync_id));
+    }
+    return aidl;
+}
+
+ConversionResult<audio_config_t>
+aidl2legacy_AudioConfig_audio_config_t(const AudioConfig& aidl, bool isInput) {
+    const audio_config_base_t legacyBase = VALUE_OR_RETURN(
+            aidl2legacy_AudioConfigBase_audio_config_base_t(aidl.base, isInput));
+    audio_config_t legacy = AUDIO_CONFIG_INITIALIZER;
+    legacy.sample_rate = legacyBase.sample_rate;
+    legacy.channel_mask = legacyBase.channel_mask;
+    legacy.format = legacyBase.format;
+    legacy.offload_info = VALUE_OR_RETURN(
+            aidl2legacy_AudioOffloadInfo_audio_offload_info_t(aidl.offloadInfo));
+    legacy.frame_count = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.frameCount));
+    return legacy;
+}
+
+ConversionResult<AudioConfig>
+legacy2aidl_audio_config_t_AudioConfig(const audio_config_t& legacy, bool isInput) {
+    const audio_config_base_t base = { .sample_rate = legacy.sample_rate,
+        .channel_mask = legacy.channel_mask, .format = legacy.format };
+    AudioConfig aidl;
+    aidl.base = VALUE_OR_RETURN(legacy2aidl_audio_config_base_t_AudioConfigBase(base, isInput));
+    aidl.offloadInfo = VALUE_OR_RETURN(
+            legacy2aidl_audio_offload_info_t_AudioOffloadInfo(legacy.offload_info));
+    aidl.frameCount = VALUE_OR_RETURN(convertIntegral<int64_t>(legacy.frame_count));
+    return aidl;
+}
+
+ConversionResult<audio_config_base_t>
+aidl2legacy_AudioConfigBase_audio_config_base_t(const AudioConfigBase& aidl, bool isInput) {
+    audio_config_base_t legacy;
+    legacy.sample_rate = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.sampleRate));
+    legacy.channel_mask = VALUE_OR_RETURN(
+            aidl2legacy_AudioChannelLayout_audio_channel_mask_t(aidl.channelMask, isInput));
+    legacy.format = VALUE_OR_RETURN(aidl2legacy_AudioFormatDescription_audio_format_t(aidl.format));
+    return legacy;
+}
+
+ConversionResult<AudioConfigBase>
+legacy2aidl_audio_config_base_t_AudioConfigBase(const audio_config_base_t& legacy, bool isInput) {
+    AudioConfigBase aidl;
+    aidl.sampleRate = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.sample_rate));
+    aidl.channelMask = VALUE_OR_RETURN(
+            legacy2aidl_audio_channel_mask_t_AudioChannelLayout(legacy.channel_mask, isInput));
+    aidl.format = VALUE_OR_RETURN(legacy2aidl_audio_format_t_AudioFormatDescription(legacy.format));
+    return aidl;
+}
+
+ConversionResult<audio_uuid_t>
+aidl2legacy_AudioUuid_audio_uuid_t(const AudioUuid& aidl) {
+    audio_uuid_t legacy;
+    legacy.timeLow = VALUE_OR_RETURN(convertReinterpret<uint32_t>(aidl.timeLow));
+    legacy.timeMid = VALUE_OR_RETURN(convertIntegral<uint16_t>(aidl.timeMid));
+    legacy.timeHiAndVersion = VALUE_OR_RETURN(convertIntegral<uint16_t>(aidl.timeHiAndVersion));
+    legacy.clockSeq = VALUE_OR_RETURN(convertIntegral<uint16_t>(aidl.clockSeq));
+    if (aidl.node.size() != std::size(legacy.node)) {
+        return unexpected(BAD_VALUE);
+    }
+    std::copy(aidl.node.begin(), aidl.node.end(), legacy.node);
+    return legacy;
+}
+
+ConversionResult<AudioUuid>
+legacy2aidl_audio_uuid_t_AudioUuid(const audio_uuid_t& legacy) {
+    AudioUuid aidl;
+    aidl.timeLow = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.timeLow));
+    aidl.timeMid = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.timeMid));
+    aidl.timeHiAndVersion = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.timeHiAndVersion));
+    aidl.clockSeq = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.clockSeq));
+    std::copy(legacy.node, legacy.node + std::size(legacy.node), std::back_inserter(aidl.node));
+    return aidl;
+}
+
+ConversionResult<audio_encapsulation_metadata_type_t>
+aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t(
+        AudioEncapsulationMetadataType aidl) {
+    switch (aidl) {
+        case AudioEncapsulationMetadataType::NONE:
+            return AUDIO_ENCAPSULATION_METADATA_TYPE_NONE;
+        case AudioEncapsulationMetadataType::FRAMEWORK_TUNER:
+            return AUDIO_ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER;
+        case AudioEncapsulationMetadataType::DVB_AD_DESCRIPTOR:
+            return AUDIO_ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioEncapsulationMetadataType>
+legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType(
+        audio_encapsulation_metadata_type_t legacy) {
+    switch (legacy) {
+        case AUDIO_ENCAPSULATION_METADATA_TYPE_NONE:
+            return AudioEncapsulationMetadataType::NONE;
+        case AUDIO_ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER:
+            return AudioEncapsulationMetadataType::FRAMEWORK_TUNER;
+        case AUDIO_ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR:
+            return AudioEncapsulationMetadataType::DVB_AD_DESCRIPTOR;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<uint32_t>
+aidl2legacy_AudioEncapsulationMode_mask(int32_t aidl) {
+    return convertBitmask<uint32_t,
+            int32_t,
+            audio_encapsulation_mode_t,
+            AudioEncapsulationMode>(
+            aidl, aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t,
+            indexToEnum_index<AudioEncapsulationMode>,
+            enumToMask_index<uint32_t, audio_encapsulation_mode_t>);
+}
+
+ConversionResult<int32_t>
+legacy2aidl_AudioEncapsulationMode_mask(uint32_t legacy) {
+    return convertBitmask<int32_t,
+            uint32_t,
+            AudioEncapsulationMode,
+            audio_encapsulation_mode_t>(
+            legacy, legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode,
+            indexToEnum_index<audio_encapsulation_mode_t>,
+            enumToMask_index<int32_t, AudioEncapsulationMode>);
+}
+
+ConversionResult<uint32_t>
+aidl2legacy_AudioEncapsulationMetadataType_mask(int32_t aidl) {
+    return convertBitmask<uint32_t,
+            int32_t,
+            audio_encapsulation_metadata_type_t,
+            AudioEncapsulationMetadataType>(
+            aidl, aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t,
+            indexToEnum_index<AudioEncapsulationMetadataType>,
+            enumToMask_index<uint32_t, audio_encapsulation_metadata_type_t>);
+}
+
+ConversionResult<int32_t>
+legacy2aidl_AudioEncapsulationMetadataType_mask(uint32_t legacy) {
+    return convertBitmask<int32_t,
+            uint32_t,
+            AudioEncapsulationMetadataType,
+            audio_encapsulation_metadata_type_t>(
+            legacy, legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType,
+            indexToEnum_index<audio_encapsulation_metadata_type_t>,
+            enumToMask_index<int32_t, AudioEncapsulationMetadataType>);
+}
+
+ConversionResult<audio_profile>
+aidl2legacy_AudioProfile_audio_profile(const AudioProfile& aidl, bool isInput) {
+    audio_profile legacy;
+    legacy.format = VALUE_OR_RETURN(aidl2legacy_AudioFormatDescription_audio_format_t(aidl.format));
+
+    if (aidl.sampleRates.size() > std::size(legacy.sample_rates)) {
+        return unexpected(BAD_VALUE);
+    }
+    RETURN_IF_ERROR(
+            convertRange(aidl.sampleRates.begin(), aidl.sampleRates.end(), legacy.sample_rates,
+                         convertIntegral<int32_t, unsigned int>));
+    legacy.num_sample_rates = aidl.sampleRates.size();
+
+    if (aidl.channelMasks.size() > std::size(legacy.channel_masks)) {
+        return unexpected(BAD_VALUE);
+    }
+    RETURN_IF_ERROR(
+            convertRange(aidl.channelMasks.begin(), aidl.channelMasks.end(), legacy.channel_masks,
+                    [isInput](const AudioChannelLayout& l) {
+                        return aidl2legacy_AudioChannelLayout_audio_channel_mask_t(l, isInput);
+                    }));
+    legacy.num_channel_masks = aidl.channelMasks.size();
+
+    legacy.encapsulation_type = VALUE_OR_RETURN(
+            aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(aidl.encapsulationType));
+    return legacy;
+}
+
+ConversionResult<AudioProfile>
+legacy2aidl_audio_profile_AudioProfile(const audio_profile& legacy, bool isInput) {
+    AudioProfile aidl;
+    aidl.format = VALUE_OR_RETURN(legacy2aidl_audio_format_t_AudioFormatDescription(legacy.format));
+
+    if (legacy.num_sample_rates > std::size(legacy.sample_rates)) {
+        return unexpected(BAD_VALUE);
+    }
+    RETURN_IF_ERROR(
+            convertRange(legacy.sample_rates, legacy.sample_rates + legacy.num_sample_rates,
+                         std::back_inserter(aidl.sampleRates),
+                         convertIntegral<unsigned int, int32_t>));
+
+    if (legacy.num_channel_masks > std::size(legacy.channel_masks)) {
+        return unexpected(BAD_VALUE);
+    }
+    RETURN_IF_ERROR(
+            convertRange(legacy.channel_masks, legacy.channel_masks + legacy.num_channel_masks,
+                         std::back_inserter(aidl.channelMasks),
+                    [isInput](audio_channel_mask_t m) {
+                        return legacy2aidl_audio_channel_mask_t_AudioChannelLayout(m, isInput);
+                    }));
+
+    aidl.encapsulationType = VALUE_OR_RETURN(
+            legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
+                    legacy.encapsulation_type));
+    return aidl;
+}
+
+ConversionResult<audio_gain>
+aidl2legacy_AudioGain_audio_gain(const AudioGain& aidl, bool isInput) {
+    audio_gain legacy;
+    legacy.mode = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_gain_mode_t_mask(aidl.mode));
+    legacy.channel_mask = VALUE_OR_RETURN(aidl2legacy_AudioChannelLayout_audio_channel_mask_t(
+                    aidl.channelMask, isInput));
+    legacy.min_value = VALUE_OR_RETURN(convertIntegral<int>(aidl.minValue));
+    legacy.max_value = VALUE_OR_RETURN(convertIntegral<int>(aidl.maxValue));
+    legacy.default_value = VALUE_OR_RETURN(convertIntegral<int>(aidl.defaultValue));
+    legacy.step_value = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.stepValue));
+    legacy.min_ramp_ms = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.minRampMs));
+    legacy.max_ramp_ms = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.maxRampMs));
+    return legacy;
+}
+
+ConversionResult<AudioGain>
+legacy2aidl_audio_gain_AudioGain(const audio_gain& legacy, bool isInput) {
+    AudioGain aidl;
+    aidl.mode = VALUE_OR_RETURN(legacy2aidl_audio_gain_mode_t_int32_t_mask(legacy.mode));
+    aidl.channelMask = VALUE_OR_RETURN(
+            legacy2aidl_audio_channel_mask_t_AudioChannelLayout(legacy.channel_mask, isInput));
+    aidl.minValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.min_value));
+    aidl.maxValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.max_value));
+    aidl.defaultValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.default_value));
+    aidl.stepValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.step_value));
+    aidl.minRampMs = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.min_ramp_ms));
+    aidl.maxRampMs = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.max_ramp_ms));
+    return aidl;
+}
+
+ConversionResult<audio_mode_t>
+aidl2legacy_AudioMode_audio_mode_t(AudioMode aidl) {
+    switch (aidl) {
+        case AudioMode::SYS_RESERVED_INVALID:
+            return AUDIO_MODE_INVALID;
+        case AudioMode::SYS_RESERVED_CURRENT:
+            return AUDIO_MODE_CURRENT;
+        case AudioMode::NORMAL:
+            return AUDIO_MODE_NORMAL;
+        case AudioMode::RINGTONE:
+            return AUDIO_MODE_RINGTONE;
+        case AudioMode::IN_CALL:
+            return AUDIO_MODE_IN_CALL;
+        case AudioMode::IN_COMMUNICATION:
+            return AUDIO_MODE_IN_COMMUNICATION;
+        case AudioMode::CALL_SCREEN:
+            return AUDIO_MODE_CALL_SCREEN;
+        case AudioMode::SYS_RESERVED_CALL_REDIRECT:
+            return AUDIO_MODE_CALL_REDIRECT;
+        case AudioMode::SYS_RESERVED_COMMUNICATION_REDIRECT:
+            return AUDIO_MODE_COMMUNICATION_REDIRECT;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioMode>
+legacy2aidl_audio_mode_t_AudioMode(audio_mode_t legacy) {
+    switch (legacy) {
+        case AUDIO_MODE_INVALID:
+            return AudioMode::SYS_RESERVED_INVALID;
+        case AUDIO_MODE_CURRENT:
+            return AudioMode::SYS_RESERVED_CURRENT;
+        case AUDIO_MODE_NORMAL:
+            return AudioMode::NORMAL;
+        case AUDIO_MODE_RINGTONE:
+            return AudioMode::RINGTONE;
+        case AUDIO_MODE_IN_CALL:
+            return AudioMode::IN_CALL;
+        case AUDIO_MODE_IN_COMMUNICATION:
+            return AudioMode::IN_COMMUNICATION;
+        case AUDIO_MODE_CALL_SCREEN:
+            return AudioMode::CALL_SCREEN;
+        case AUDIO_MODE_CALL_REDIRECT:
+            return AudioMode::SYS_RESERVED_CALL_REDIRECT;
+        case AUDIO_MODE_COMMUNICATION_REDIRECT:
+            return AudioMode::SYS_RESERVED_COMMUNICATION_REDIRECT;
+        case AUDIO_MODE_CNT:
+            break;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_standard_t>
+aidl2legacy_AudioStandard_audio_standard_t(AudioStandard aidl) {
+    switch (aidl) {
+        case AudioStandard::NONE:
+            return AUDIO_STANDARD_NONE;
+        case AudioStandard::EDID:
+            return AUDIO_STANDARD_EDID;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioStandard>
+legacy2aidl_audio_standard_t_AudioStandard(audio_standard_t legacy) {
+    switch (legacy) {
+        case AUDIO_STANDARD_NONE:
+            return AudioStandard::NONE;
+        case AUDIO_STANDARD_EDID:
+            return AudioStandard::EDID;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<audio_extra_audio_descriptor>
+aidl2legacy_ExtraAudioDescriptor_audio_extra_audio_descriptor(
+        const ExtraAudioDescriptor& aidl) {
+    audio_extra_audio_descriptor legacy;
+    legacy.standard = VALUE_OR_RETURN(aidl2legacy_AudioStandard_audio_standard_t(aidl.standard));
+    if (aidl.audioDescriptor.size() > EXTRA_AUDIO_DESCRIPTOR_SIZE) {
+        return unexpected(BAD_VALUE);
+    }
+    legacy.descriptor_length = aidl.audioDescriptor.size();
+    std::copy(aidl.audioDescriptor.begin(), aidl.audioDescriptor.end(),
+              std::begin(legacy.descriptor));
+    legacy.encapsulation_type =
+            VALUE_OR_RETURN(aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(
+                    aidl.encapsulationType));
+    return legacy;
+}
+
+ConversionResult<ExtraAudioDescriptor>
+legacy2aidl_audio_extra_audio_descriptor_ExtraAudioDescriptor(
+        const audio_extra_audio_descriptor& legacy) {
+    ExtraAudioDescriptor aidl;
+    aidl.standard = VALUE_OR_RETURN(legacy2aidl_audio_standard_t_AudioStandard(legacy.standard));
+    if (legacy.descriptor_length > EXTRA_AUDIO_DESCRIPTOR_SIZE) {
+        return unexpected(BAD_VALUE);
+    }
+    aidl.audioDescriptor.resize(legacy.descriptor_length);
+    std::copy(legacy.descriptor, legacy.descriptor + legacy.descriptor_length,
+              aidl.audioDescriptor.begin());
+    aidl.encapsulationType =
+            VALUE_OR_RETURN(legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
+                    legacy.encapsulation_type));
+    return aidl;
+}
+
+ConversionResult<audio_encapsulation_type_t>
+aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(
+        const AudioEncapsulationType& aidl) {
+    switch (aidl) {
+        case AudioEncapsulationType::NONE:
+            return AUDIO_ENCAPSULATION_TYPE_NONE;
+        case AudioEncapsulationType::IEC61937:
+            return AUDIO_ENCAPSULATION_TYPE_IEC61937;
+        case AudioEncapsulationType::PCM:
+            return AUDIO_ENCAPSULATION_TYPE_PCM;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+ConversionResult<AudioEncapsulationType>
+legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
+        const audio_encapsulation_type_t & legacy) {
+    switch (legacy) {
+        case AUDIO_ENCAPSULATION_TYPE_NONE:
+            return AudioEncapsulationType::NONE;
+        case AUDIO_ENCAPSULATION_TYPE_IEC61937:
+            return AudioEncapsulationType::IEC61937;
+        case AUDIO_ENCAPSULATION_TYPE_PCM:
+            return AudioEncapsulationType::PCM;
+    }
+    return unexpected(BAD_VALUE);
+}
+
+}  // namespace android
+
+#if defined(BACKEND_NDK)
+}  // aidl
+#endif
\ No newline at end of file
diff --git a/media/audioaidlconversion/Android.bp b/media/audioaidlconversion/Android.bp
new file mode 100644
index 0000000..4a1df3a
--- /dev/null
+++ b/media/audioaidlconversion/Android.bp
@@ -0,0 +1,140 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_av_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_av_license"],
+}
+
+cc_defaults {
+    name: "audio_aidl_conversion_common_util_default",
+    host_supported: true,
+    vendor_available: true,
+    double_loadable: true,
+    min_sdk_version: "29",
+    export_include_dirs: [
+        "include",
+    ],
+    header_libs: [
+        "libbase_headers",
+        "liberror_headers",
+    ],
+    export_header_lib_headers: [
+        "libbase_headers",
+        "liberror_headers",
+    ],
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.btservices",
+        "com.android.media",
+        "com.android.media.swcodec",
+    ],
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
+}
+
+// This is intended for clients needing to include AidlConversionUtil.h, without extra dependencies.
+cc_library_headers {
+    name: "libaudio_aidl_conversion_common_util_cpp",
+    defaults: [
+        "audio_aidl_conversion_common_util_default",
+    ],
+}
+
+cc_library_headers {
+    name: "libaudio_aidl_conversion_common_util_ndk",
+    defaults: [
+        "audio_aidl_conversion_common_util_default",
+    ],
+    cflags: [
+        "-DBACKEND_NDK",
+    ],
+}
+
+cc_defaults {
+    name: "audio_aidl_conversion_common_default",
+    export_include_dirs: ["include"],
+    host_supported: true,
+    vendor_available: true,
+    double_loadable: true,
+    min_sdk_version: "29",
+    header_libs: [
+        "libaudio_system_headers",
+    ],
+    shared_libs: [
+        "libbase",
+        "libbinder",
+        "liblog",
+        "libshmemcompat",
+        "libstagefright_foundation",
+        "libutils",
+        "shared-file-region-aidl-cpp",
+        "framework-permission-aidl-cpp",
+    ],
+    export_shared_lib_headers: [
+        "libbase",
+        "shared-file-region-aidl-cpp",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-error=deprecated-declarations",
+    ],
+    sanitize: {
+        misc_undefined: [
+            "unsigned-integer-overflow",
+            "signed-integer-overflow",
+        ],
+    },
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
+}
+
+/**
+ * Only AIDL CPP backend conversion supported.
+ */
+cc_library {
+    name: "libaudio_aidl_conversion_common_cpp",
+    srcs: ["AidlConversionCppNdk.cpp"],
+    header_libs: [
+        "libaudio_aidl_conversion_common_util_cpp",
+    ],
+    export_header_lib_headers: [
+        "libaudio_aidl_conversion_common_util_cpp",
+    ],
+    defaults: [
+        "audio_aidl_conversion_common_default",
+        "latest_android_media_audio_common_types_cpp_export_shared",
+    ],
+}
+
+/**
+ * Only AIDL NDK backend conversion supported.
+ */
+cc_library {
+    name: "libaudio_aidl_conversion_common_ndk",
+    srcs: ["AidlConversionCppNdk.cpp"],
+    header_libs: [
+        "libaudio_aidl_conversion_common_util_ndk",
+    ],
+    export_header_lib_headers: [
+        "libaudio_aidl_conversion_common_util_ndk",
+    ],
+    defaults: [
+        "audio_aidl_conversion_common_default",
+        "latest_android_media_audio_common_types_ndk_shared",
+    ],
+    shared_libs: [
+        "libbinder_ndk",
+    ],
+    cflags: [
+        "-DBACKEND_NDK",
+    ],
+}
diff --git a/media/audioaidlconversion/include/media/AidlConversionCppNdk.h b/media/audioaidlconversion/include/media/AidlConversionCppNdk.h
new file mode 100644
index 0000000..e1efff9
--- /dev/null
+++ b/media/audioaidlconversion/include/media/AidlConversionCppNdk.h
@@ -0,0 +1,294 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <limits>
+#include <type_traits>
+#include <system/audio.h>
+
+/**
+ * Can handle conversion between AIDL (both CPP and NDK backend) and legacy type.
+ * Controlled by the cflags preprocessor in Android.bp.
+ */
+#if defined(BACKEND_NDK)
+#define PREFIX(f) <aidl/f>
+#else
+#define PREFIX(f) <f>
+#endif
+
+#include PREFIX(android/media/audio/common/AudioChannelLayout.h)
+#include PREFIX(android/media/audio/common/AudioConfig.h)
+#include PREFIX(android/media/audio/common/AudioConfigBase.h)
+#include PREFIX(android/media/audio/common/AudioContentType.h)
+#include PREFIX(android/media/audio/common/AudioDeviceDescription.h)
+#include PREFIX(android/media/audio/common/AudioEncapsulationMetadataType.h)
+#include PREFIX(android/media/audio/common/AudioEncapsulationMode.h)
+#include PREFIX(android/media/audio/common/AudioEncapsulationType.h)
+#include PREFIX(android/media/audio/common/AudioFormatDescription.h)
+#include PREFIX(android/media/audio/common/AudioGain.h)
+#include PREFIX(android/media/audio/common/AudioGainConfig.h)
+#include PREFIX(android/media/audio/common/AudioGainMode.h)
+#include PREFIX(android/media/audio/common/AudioInputFlags.h)
+#include PREFIX(android/media/audio/common/AudioIoFlags.h)
+#include PREFIX(android/media/audio/common/AudioMode.h)
+#include PREFIX(android/media/audio/common/AudioOffloadInfo.h)
+#include PREFIX(android/media/audio/common/AudioOutputFlags.h)
+#include PREFIX(android/media/audio/common/AudioPortExt.h)
+#include PREFIX(android/media/audio/common/AudioPortMixExt.h)
+#include PREFIX(android/media/audio/common/AudioProfile.h)
+#include PREFIX(android/media/audio/common/AudioSource.h)
+#include PREFIX(android/media/audio/common/AudioStandard.h)
+#include PREFIX(android/media/audio/common/AudioUsage.h)
+#include PREFIX(android/media/audio/common/AudioUuid.h)
+#include PREFIX(android/media/audio/common/ExtraAudioDescriptor.h)
+#include PREFIX(android/media/audio/common/Int.h)
+#undef PREFIX
+
+#include <media/AidlConversionUtil.h>
+#include <system/audio.h>
+#include <system/audio_effect.h>
+
+using ::android::String16;
+using ::android::String8;
+
+#if defined(BACKEND_NDK)
+namespace aidl {
+#endif
+
+namespace android {
+
+// maxSize is the size of the C-string buffer (including the 0-terminator), NOT the max length of
+// the string.
+::android::status_t aidl2legacy_string(std::string_view aidl, char* dest, size_t maxSize);
+ConversionResult<std::string> legacy2aidl_string(const char* legacy, size_t maxSize);
+
+ConversionResult<audio_module_handle_t> aidl2legacy_int32_t_audio_module_handle_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_module_handle_t_int32_t(audio_module_handle_t legacy);
+
+ConversionResult<audio_io_handle_t> aidl2legacy_int32_t_audio_io_handle_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_io_handle_t_int32_t(audio_io_handle_t legacy);
+
+ConversionResult<audio_port_handle_t> aidl2legacy_int32_t_audio_port_handle_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_port_handle_t_int32_t(audio_port_handle_t legacy);
+
+ConversionResult<audio_patch_handle_t> aidl2legacy_int32_t_audio_patch_handle_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_patch_handle_t_int32_t(audio_patch_handle_t legacy);
+
+ConversionResult<audio_unique_id_t> aidl2legacy_int32_t_audio_unique_id_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_unique_id_t_int32_t(audio_unique_id_t legacy);
+
+ConversionResult<audio_hw_sync_t> aidl2legacy_int32_t_audio_hw_sync_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_hw_sync_t_int32_t(audio_hw_sync_t legacy);
+
+ConversionResult<unsigned int> aidl2legacy_int32_t_config_mask(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_config_mask_int32_t(unsigned int legacy);
+
+ConversionResult<pid_t> aidl2legacy_int32_t_pid_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_pid_t_int32_t(pid_t legacy);
+
+ConversionResult<uid_t> aidl2legacy_int32_t_uid_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_uid_t_int32_t(uid_t legacy);
+
+ConversionResult<String8> aidl2legacy_string_view_String8(std::string_view aidl);
+ConversionResult<std::string> legacy2aidl_String8_string(const String8& legacy);
+
+ConversionResult<String16> aidl2legacy_string_view_String16(std::string_view aidl);
+ConversionResult<std::string> legacy2aidl_String16_string(const String16& legacy);
+
+ConversionResult<std::optional<String16>>
+aidl2legacy_optional_string_view_optional_String16(std::optional<std::string_view> aidl);
+ConversionResult<std::optional<std::string_view>>
+legacy2aidl_optional_String16_optional_string(std::optional<String16> legacy);
+
+ConversionResult<audio_channel_mask_t> aidl2legacy_AudioChannelLayout_audio_channel_mask_t(
+        const media::audio::common::AudioChannelLayout& aidl, bool isInput);
+ConversionResult<media::audio::common::AudioChannelLayout>
+legacy2aidl_audio_channel_mask_t_AudioChannelLayout(audio_channel_mask_t legacy, bool isInput);
+
+ConversionResult<audio_config_t>
+aidl2legacy_AudioConfig_audio_config_t(const media::audio::common::AudioConfig& aidl, bool isInput);
+ConversionResult<media::audio::common::AudioConfig>
+legacy2aidl_audio_config_t_AudioConfig(const audio_config_t& legacy, bool isInput);
+
+ConversionResult<audio_config_base_t>
+aidl2legacy_AudioConfigBase_audio_config_base_t(
+        const media::audio::common::AudioConfigBase& aidl, bool isInput);
+ConversionResult<media::audio::common::AudioConfigBase>
+legacy2aidl_audio_config_base_t_AudioConfigBase(const audio_config_base_t& legacy, bool isInput);
+
+ConversionResult<audio_input_flags_t>
+aidl2legacy_AudioInputFlags_audio_input_flags_t(media::audio::common::AudioInputFlags aidl);
+ConversionResult<media::audio::common::AudioInputFlags>
+legacy2aidl_audio_input_flags_t_AudioInputFlags(audio_input_flags_t legacy);
+
+ConversionResult<audio_output_flags_t>
+aidl2legacy_AudioOutputFlags_audio_output_flags_t(media::audio::common::AudioOutputFlags aidl);
+ConversionResult<media::audio::common::AudioOutputFlags>
+legacy2aidl_audio_output_flags_t_AudioOutputFlags(audio_output_flags_t legacy);
+
+ConversionResult<audio_input_flags_t> aidl2legacy_int32_t_audio_input_flags_t_mask(
+        int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_input_flags_t_int32_t_mask(
+        audio_input_flags_t legacy);
+
+ConversionResult<audio_output_flags_t> aidl2legacy_int32_t_audio_output_flags_t_mask(
+        int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_output_flags_t_int32_t_mask(
+        audio_output_flags_t legacy);
+
+ConversionResult<audio_io_flags> aidl2legacy_AudioIoFlags_audio_io_flags(
+        const media::audio::common::AudioIoFlags& aidl, bool isInput);
+ConversionResult<media::audio::common::AudioIoFlags> legacy2aidl_audio_io_flags_AudioIoFlags(
+        const audio_io_flags& legacy, bool isInput);
+
+ConversionResult<audio_session_t> aidl2legacy_int32_t_audio_session_t(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_session_t_int32_t(audio_session_t legacy);
+
+ConversionResult<audio_content_type_t>
+aidl2legacy_AudioContentType_audio_content_type_t(
+        media::audio::common::AudioContentType aidl);
+ConversionResult<media::audio::common::AudioContentType>
+legacy2aidl_audio_content_type_t_AudioContentType(audio_content_type_t legacy);
+
+ConversionResult<audio_devices_t> aidl2legacy_AudioDeviceDescription_audio_devices_t(
+        const media::audio::common::AudioDeviceDescription& aidl);
+ConversionResult<media::audio::common::AudioDeviceDescription>
+legacy2aidl_audio_devices_t_AudioDeviceDescription(audio_devices_t legacy);
+
+::android::status_t aidl2legacy_AudioDevice_audio_device(
+        const media::audio::common::AudioDevice& aidl, audio_devices_t* legacyType,
+        char* legacyAddress);
+::android::status_t aidl2legacy_AudioDevice_audio_device(
+        const media::audio::common::AudioDevice& aidl, audio_devices_t* legacyType,
+        String8* legacyAddress);
+::android::status_t aidl2legacy_AudioDevice_audio_device(
+        const media::audio::common::AudioDevice& aidl, audio_devices_t* legacyType,
+        std::string* legacyAddress);
+
+ConversionResult<media::audio::common::AudioDevice> legacy2aidl_audio_device_AudioDevice(
+        audio_devices_t legacyType, const char* legacyAddress);
+ConversionResult<media::audio::common::AudioDevice> legacy2aidl_audio_device_AudioDevice(
+        audio_devices_t legacyType, const String8& legacyAddress);
+
+ConversionResult<audio_extra_audio_descriptor>
+aidl2legacy_ExtraAudioDescriptor_audio_extra_audio_descriptor(
+        const media::audio::common::ExtraAudioDescriptor& aidl);
+
+ConversionResult<media::audio::common::ExtraAudioDescriptor>
+legacy2aidl_audio_extra_audio_descriptor_ExtraAudioDescriptor(
+        const audio_extra_audio_descriptor& legacy);
+
+ConversionResult<audio_encapsulation_metadata_type_t>
+aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t(
+        media::audio::common::AudioEncapsulationMetadataType aidl);
+ConversionResult<media::audio::common::AudioEncapsulationMetadataType>
+legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType(
+        audio_encapsulation_metadata_type_t legacy);
+
+ConversionResult<uint32_t> aidl2legacy_AudioEncapsulationMetadataType_mask(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_AudioEncapsulationMetadataType_mask(uint32_t legacy);
+
+ConversionResult<audio_encapsulation_mode_t>
+aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(
+        media::audio::common::AudioEncapsulationMode aidl);
+ConversionResult<media::audio::common::AudioEncapsulationMode>
+legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(audio_encapsulation_mode_t legacy);
+
+ConversionResult<uint32_t> aidl2legacy_AudioEncapsulationMode_mask(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_AudioEncapsulationMode_mask(uint32_t legacy);
+
+ConversionResult<audio_encapsulation_type_t>
+aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(
+        const media::audio::common::AudioEncapsulationType& aidl);
+ConversionResult<media::audio::common::AudioEncapsulationType>
+legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
+        const audio_encapsulation_type_t& legacy);
+
+ConversionResult<audio_format_t> aidl2legacy_AudioFormatDescription_audio_format_t(
+        const media::audio::common::AudioFormatDescription& aidl);
+ConversionResult<media::audio::common::AudioFormatDescription>
+legacy2aidl_audio_format_t_AudioFormatDescription(audio_format_t legacy);
+
+ConversionResult<audio_gain_mode_t>
+aidl2legacy_AudioGainMode_audio_gain_mode_t(media::audio::common::AudioGainMode aidl);
+ConversionResult<media::audio::common::AudioGainMode>
+legacy2aidl_audio_gain_mode_t_AudioGainMode(audio_gain_mode_t legacy);
+
+ConversionResult<audio_gain_mode_t> aidl2legacy_int32_t_audio_gain_mode_t_mask(int32_t aidl);
+ConversionResult<int32_t> legacy2aidl_audio_gain_mode_t_int32_t_mask(audio_gain_mode_t legacy);
+
+ConversionResult<audio_gain_config> aidl2legacy_AudioGainConfig_audio_gain_config(
+        const media::audio::common::AudioGainConfig& aidl, bool isInput);
+ConversionResult<media::audio::common::AudioGainConfig>
+legacy2aidl_audio_gain_config_AudioGainConfig(const audio_gain_config& legacy, bool isInput);
+
+ConversionResult<audio_gain>
+aidl2legacy_AudioGain_audio_gain(const media::audio::common::AudioGain& aidl, bool isInput);
+ConversionResult<media::audio::common::AudioGain>
+legacy2aidl_audio_gain_AudioGain(const audio_gain& legacy, bool isInput);
+
+ConversionResult<audio_input_flags_t>
+aidl2legacy_AudioInputFlags_audio_input_flags_t(media::audio::common::AudioInputFlags aidl);
+ConversionResult<media::audio::common::AudioInputFlags>
+legacy2aidl_audio_input_flags_t_AudioInputFlags(audio_input_flags_t legacy);
+
+ConversionResult<audio_mode_t>
+aidl2legacy_AudioMode_audio_mode_t(media::audio::common::AudioMode aidl);
+ConversionResult<media::audio::common::AudioMode>
+legacy2aidl_audio_mode_t_AudioMode(audio_mode_t legacy);
+
+ConversionResult<audio_offload_info_t>
+aidl2legacy_AudioOffloadInfo_audio_offload_info_t(
+        const media::audio::common::AudioOffloadInfo& aidl);
+ConversionResult<media::audio::common::AudioOffloadInfo>
+legacy2aidl_audio_offload_info_t_AudioOffloadInfo(const audio_offload_info_t& legacy);
+
+ConversionResult<audio_output_flags_t>
+aidl2legacy_AudioOutputFlags_audio_output_flags_t(media::audio::common::AudioOutputFlags aidl);
+ConversionResult<media::audio::common::AudioOutputFlags>
+legacy2aidl_audio_output_flags_t_AudioOutputFlags(audio_output_flags_t legacy);
+
+ConversionResult<audio_profile> aidl2legacy_AudioProfile_audio_profile(
+        const media::audio::common::AudioProfile& aidl, bool isInput);
+ConversionResult<media::audio::common::AudioProfile> legacy2aidl_audio_profile_AudioProfile(
+        const audio_profile& legacy, bool isInput);
+
+ConversionResult<audio_standard_t> aidl2legacy_AudioStandard_audio_standard_t(
+        media::audio::common::AudioStandard aidl);
+ConversionResult<media::audio::common::AudioStandard> legacy2aidl_audio_standard_t_AudioStandard(
+        audio_standard_t legacy);
+
+ConversionResult<audio_source_t> aidl2legacy_AudioSource_audio_source_t(
+        media::audio::common::AudioSource aidl);
+ConversionResult<media::audio::common::AudioSource> legacy2aidl_audio_source_t_AudioSource(
+        audio_source_t legacy);
+
+ConversionResult<audio_usage_t> aidl2legacy_AudioUsage_audio_usage_t(
+        media::audio::common::AudioUsage aidl);
+ConversionResult<media::audio::common::AudioUsage> legacy2aidl_audio_usage_t_AudioUsage(
+        audio_usage_t legacy);
+
+ConversionResult<audio_uuid_t> aidl2legacy_AudioUuid_audio_uuid_t(
+        const media::audio::common::AudioUuid &aidl);
+ConversionResult<media::audio::common::AudioUuid> legacy2aidl_audio_uuid_t_AudioUuid(
+        const audio_uuid_t& legacy);
+
+}  // namespace android
+
+#if defined(BACKEND_NDK)
+} // aidl
+#endif
\ No newline at end of file
diff --git a/media/libaudioclient/include/media/AidlConversionUtil.h b/media/audioaidlconversion/include/media/AidlConversionUtil.h
similarity index 80%
rename from media/libaudioclient/include/media/AidlConversionUtil.h
rename to media/audioaidlconversion/include/media/AidlConversionUtil.h
index 8817c35..95daa4a 100644
--- a/media/libaudioclient/include/media/AidlConversionUtil.h
+++ b/media/audioaidlconversion/include/media/AidlConversionUtil.h
@@ -20,15 +20,21 @@
 #include <type_traits>
 #include <utility>
 
-#include <binder/Enums.h>
+#include <android-base/expected.h>
 #include <binder/Status.h>
 #include <error/Result.h>
 
-namespace android {
+#if defined(BACKEND_NDK)
+#include <android/binder_status.h>
+namespace aidl {
+#else
+#include <binder/Enums.h>
+#endif
 
 template <typename T>
-using ConversionResult = error::Result<T>;
+using ConversionResult = ::android::error::Result<T>;
 
+namespace android {
 /**
  * A generic template to safely cast between integral types, respecting limits of the destination
  * type.
@@ -39,15 +45,15 @@
     // have the signed converted to unsigned and produce wrong results.
     if (std::is_signed_v<From> && !std::is_signed_v<To>) {
         if (from < 0 || from > std::numeric_limits<To>::max()) {
-            return base::unexpected(BAD_VALUE);
+            return ::android::base::unexpected(::android::BAD_VALUE);
         }
     } else if (std::is_signed_v<To> && !std::is_signed_v<From>) {
         if (from > std::numeric_limits<To>::max()) {
-            return base::unexpected(BAD_VALUE);
+            return ::android::base::unexpected(::android::BAD_VALUE);
         }
     } else {
         if (from < std::numeric_limits<To>::min() || from > std::numeric_limits<To>::max()) {
-            return base::unexpected(BAD_VALUE);
+            return ::android::base::unexpected(::android::BAD_VALUE);
         }
     }
     return static_cast<To>(from);
@@ -67,14 +73,14 @@
  * A generic template that helps convert containers of convertible types, using iterators.
  */
 template<typename InputIterator, typename OutputIterator, typename Func>
-status_t convertRange(InputIterator start,
+::android::status_t convertRange(InputIterator start,
                       InputIterator end,
                       OutputIterator out,
                       const Func& itemConversion) {
     for (InputIterator iter = start; iter != end; ++iter, ++out) {
         *out = VALUE_OR_RETURN_STATUS(itemConversion(*iter));
     }
-    return OK;
+    return ::android::OK;
 }
 
 /**
@@ -82,7 +88,7 @@
  * Uses a limit as maximum conversion items.
  */
 template<typename InputIterator, typename OutputIterator, typename Func>
-status_t convertRangeWithLimit(InputIterator start,
+::android::status_t convertRangeWithLimit(InputIterator start,
                       InputIterator end,
                       OutputIterator out,
                       const Func& itemConversion,
@@ -94,7 +100,7 @@
     for (InputIterator iter = start; (iter != last); ++iter, ++out) {
         *out = VALUE_OR_RETURN_STATUS(itemConversion(*iter));
     }
-    return OK;
+    return ::android::OK;
 }
 
 /**
@@ -140,7 +146,7 @@
     OutputContainer output;
     auto ins = std::inserter(output, output.begin());
     for (const auto& item1 : input1) {
-        RETURN_IF_ERROR(iter2 != input2.end() ? OK : BAD_VALUE);
+        RETURN_IF_ERROR(iter2 != input2.end() ? ::android::OK : ::android::BAD_VALUE);
         *ins = VALUE_OR_RETURN(itemConversion(item1, *iter2++));
     }
     return output;
@@ -248,7 +254,8 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Utilities for working with AIDL unions.
 // UNION_GET(obj, fieldname) returns a ConversionResult<T> containing either the strongly-typed
-//   value of the respective field, or BAD_VALUE if the union is not set to the requested field.
+//   value of the respective field, or ::android::BAD_VALUE if the union is not set to the requested
+//   field.
 // UNION_SET(obj, fieldname, value) sets the requested field to the given value.
 
 template<typename T, typename T::Tag tag>
@@ -257,7 +264,7 @@
 template<typename T, typename T::Tag tag>
 ConversionResult<UnionFieldType<T, tag>> unionGetField(const T& u) {
     if (u.getTag() != tag) {
-        return base::unexpected(BAD_VALUE);
+        return ::android::base::unexpected(::android::BAD_VALUE);
     }
     return u.template get<tag>();
 }
@@ -275,7 +282,11 @@
  */
 template <typename T>
 bool isValidEnum(T value) {
-    constexpr android::enum_range<T> er{};
+#if defined(BACKEND_NDK)
+    constexpr ndk::enum_range<T> er{};
+#else
+    constexpr ::android::enum_range<T> er{};
+#endif
     return std::find(er.begin(), er.end(), value) != er.end();
 }
 
@@ -294,7 +305,7 @@
 }
 
 /**
- * Return the equivalent Android status_t from a binder exception code.
+ * Return the equivalent Android ::android::status_t from a binder exception code.
  *
  * Generally one should use statusTFromBinderStatus() instead.
  *
@@ -304,33 +315,33 @@
  * Note: for EX_TRANSACTION_FAILED and EX_SERVICE_SPECIFIC a more detailed error code
  * can be found from transactionError() or serviceSpecificErrorCode().
  */
-static inline status_t statusTFromExceptionCode(int32_t exceptionCode) {
+static inline ::android::status_t statusTFromExceptionCode(int32_t exceptionCode) {
     using namespace ::android::binder;
     switch (exceptionCode) {
         case Status::EX_NONE:
-            return OK;
-        case Status::EX_SECURITY: // Java SecurityException, rethrows locally in Java
-            return PERMISSION_DENIED;
-        case Status::EX_BAD_PARCELABLE: // Java BadParcelableException, rethrows in Java
-        case Status::EX_ILLEGAL_ARGUMENT: // Java IllegalArgumentException, rethrows in Java
-        case Status::EX_NULL_POINTER: // Java NullPointerException, rethrows in Java
-            return BAD_VALUE;
-        case Status::EX_ILLEGAL_STATE: // Java IllegalStateException, rethrows in Java
-        case Status::EX_UNSUPPORTED_OPERATION: // Java UnsupportedOperationException, rethrows
-            return INVALID_OPERATION;
+            return ::android::OK;
+        case Status::EX_SECURITY:  // Java SecurityException, rethrows locally in Java
+            return ::android::PERMISSION_DENIED;
+        case Status::EX_BAD_PARCELABLE:  // Java BadParcelableException, rethrows in Java
+        case Status::EX_ILLEGAL_ARGUMENT:  // Java IllegalArgumentException, rethrows in Java
+        case Status::EX_NULL_POINTER:  // Java NullPointerException, rethrows in Java
+            return ::android::BAD_VALUE;
+        case Status::EX_ILLEGAL_STATE:  // Java IllegalStateException, rethrows in Java
+        case Status::EX_UNSUPPORTED_OPERATION:  // Java UnsupportedOperationException, rethrows
+            return ::android::INVALID_OPERATION;
         case Status::EX_HAS_REPLY_HEADER: // Native strictmode violation
-        case Status::EX_PARCELABLE: // Java bootclass loader (not standard exception), rethrows
-        case Status::EX_NETWORK_MAIN_THREAD: // Java NetworkOnMainThreadException, rethrows
+        case Status::EX_PARCELABLE:  // Java bootclass loader (not standard exception), rethrows
+        case Status::EX_NETWORK_MAIN_THREAD:  // Java NetworkOnMainThreadException, rethrows
         case Status::EX_TRANSACTION_FAILED: // Native - see error code
-        case Status::EX_SERVICE_SPECIFIC:  // Java ServiceSpecificException,
-                                           // rethrows in Java with integer error code
-            return UNKNOWN_ERROR;
+        case Status::EX_SERVICE_SPECIFIC:   // Java ServiceSpecificException,
+                                            // rethrows in Java with integer error code
+            return ::android::UNKNOWN_ERROR;
     }
-    return UNKNOWN_ERROR;
+    return ::android::UNKNOWN_ERROR;
 }
 
 /**
- * Return the equivalent Android status_t from a binder status.
+ * Return the equivalent Android ::android::status_t from a binder status.
  *
  * Used to handle errors from a AIDL method declaration
  *
@@ -340,8 +351,8 @@
  *
  * return_type method(type0 param0, ...)
  */
-static inline status_t statusTFromBinderStatus(const ::android::binder::Status &status) {
-    return status.isOk() ? OK // check OK,
+static inline ::android::status_t statusTFromBinderStatus(const ::android::binder::Status &status) {
+    return status.isOk() ? ::android::OK // check ::android::OK,
         : status.serviceSpecificErrorCode() // service-side error, not standard Java exception
                                             // (fromServiceSpecificError)
         ?: status.transactionError() // a native binder transaction error (fromStatusT)
@@ -356,23 +367,23 @@
  * where Java callers expect an exception, not an integer return value.
  */
 static inline ::android::binder::Status binderStatusFromStatusT(
-        status_t status, const char *optionalMessage = nullptr) {
+        ::android::status_t status, const char *optionalMessage = nullptr) {
     const char * const emptyIfNull = optionalMessage == nullptr ? "" : optionalMessage;
     // From binder::Status instructions:
     //  Prefer a generic exception code when possible, then a service specific
-    //  code, and finally a status_t for low level failures or legacy support.
+    //  code, and finally a ::android::status_t for low level failures or legacy support.
     //  Exception codes and service specific errors map to nicer exceptions for
     //  Java clients.
 
     using namespace ::android::binder;
     switch (status) {
-        case OK:
+        case ::android::OK:
             return Status::ok();
-        case PERMISSION_DENIED: // throw SecurityException on Java side
+        case ::android::PERMISSION_DENIED: // throw SecurityException on Java side
             return Status::fromExceptionCode(Status::EX_SECURITY, emptyIfNull);
-        case BAD_VALUE: // throw IllegalArgumentException on Java side
+        case ::android::BAD_VALUE: // throw IllegalArgumentException on Java side
             return Status::fromExceptionCode(Status::EX_ILLEGAL_ARGUMENT, emptyIfNull);
-        case INVALID_OPERATION: // throw IllegalStateException on Java side
+        case ::android::INVALID_OPERATION: // throw IllegalStateException on Java side
             return Status::fromExceptionCode(Status::EX_ILLEGAL_STATE, emptyIfNull);
     }
 
@@ -387,3 +398,7 @@
 } // namespace aidl_utils
 
 }  // namespace android
+
+#if defined(BACKEND_NDK)
+}  // namespace aidl
+#endif
\ No newline at end of file
diff --git a/media/libaudioclient/AidlConversion.cpp b/media/libaudioclient/AidlConversion.cpp
index 1a08eae..9fb0290 100644
--- a/media/libaudioclient/AidlConversion.cpp
+++ b/media/libaudioclient/AidlConversion.cpp
@@ -42,9 +42,6 @@
 using media::audio::common::AudioDeviceAddress;
 using media::audio::common::AudioDeviceDescription;
 using media::audio::common::AudioDeviceType;
-using media::audio::common::AudioEncapsulationMetadataType;
-using media::audio::common::AudioEncapsulationMode;
-using media::audio::common::AudioEncapsulationType;
 using media::audio::common::AudioFormatDescription;
 using media::audio::common::AudioFormatType;
 using media::audio::common::AudioGain;
@@ -138,127 +135,6 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Converters
 
-status_t aidl2legacy_string(std::string_view aidl, char* dest, size_t maxSize) {
-    if (aidl.size() > maxSize - 1) {
-        return BAD_VALUE;
-    }
-    aidl.copy(dest, aidl.size());
-    dest[aidl.size()] = '\0';
-    return OK;
-}
-
-ConversionResult<std::string> legacy2aidl_string(const char* legacy, size_t maxSize) {
-    if (legacy == nullptr) {
-        return unexpected(BAD_VALUE);
-    }
-    if (strnlen(legacy, maxSize) == maxSize) {
-        // No null-terminator.
-        return unexpected(BAD_VALUE);
-    }
-    return std::string(legacy);
-}
-
-ConversionResult<audio_module_handle_t> aidl2legacy_int32_t_audio_module_handle_t(int32_t aidl) {
-    return convertReinterpret<audio_module_handle_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_module_handle_t_int32_t(audio_module_handle_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<audio_io_handle_t> aidl2legacy_int32_t_audio_io_handle_t(int32_t aidl) {
-    return convertReinterpret<audio_io_handle_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_io_handle_t_int32_t(audio_io_handle_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<audio_port_handle_t> aidl2legacy_int32_t_audio_port_handle_t(int32_t aidl) {
-    return convertReinterpret<audio_port_handle_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_port_handle_t_int32_t(audio_port_handle_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<audio_patch_handle_t> aidl2legacy_int32_t_audio_patch_handle_t(int32_t aidl) {
-    return convertReinterpret<audio_patch_handle_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_patch_handle_t_int32_t(audio_patch_handle_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<audio_unique_id_t> aidl2legacy_int32_t_audio_unique_id_t(int32_t aidl) {
-    return convertReinterpret<audio_unique_id_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_unique_id_t_int32_t(audio_unique_id_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<audio_hw_sync_t> aidl2legacy_int32_t_audio_hw_sync_t(int32_t aidl) {
-    return convertReinterpret<audio_hw_sync_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_hw_sync_t_int32_t(audio_hw_sync_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<pid_t> aidl2legacy_int32_t_pid_t(int32_t aidl) {
-    return convertReinterpret<pid_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_pid_t_int32_t(pid_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<uid_t> aidl2legacy_int32_t_uid_t(int32_t aidl) {
-    return convertReinterpret<uid_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_uid_t_int32_t(uid_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
-ConversionResult<String16> aidl2legacy_string_view_String16(std::string_view aidl) {
-    return String16(aidl.data(), aidl.size());
-}
-
-ConversionResult<std::string> legacy2aidl_String16_string(const String16& legacy) {
-    return std::string(String8(legacy).c_str());
-}
-
-// TODO b/182392769: create an optional -> optional util
-ConversionResult<std::optional<String16>>
-aidl2legacy_optional_string_view_optional_String16(std::optional<std::string_view> aidl) {
-    if (!aidl.has_value()) {
-        return std::nullopt;
-    }
-    ConversionResult<String16> conversion =
-        VALUE_OR_RETURN(aidl2legacy_string_view_String16(aidl.value()));
-    return conversion.value();
-}
-
-ConversionResult<std::optional<std::string_view>>
-legacy2aidl_optional_String16_optional_string(std::optional<String16> legacy) {
-  if (!legacy.has_value()) {
-    return std::nullopt;
-  }
-  ConversionResult<std::string> conversion =
-      VALUE_OR_RETURN(legacy2aidl_String16_string(legacy.value()));
-  return conversion.value();
-}
-
-ConversionResult<String8> aidl2legacy_string_view_String8(std::string_view aidl) {
-    return String8(aidl.data(), aidl.size());
-}
-
-ConversionResult<std::string> legacy2aidl_String8_string(const String8& legacy) {
-    return std::string(legacy.c_str());
-}
-
 ConversionResult<audio_io_config_event_t> aidl2legacy_AudioIoConfigEvent_audio_io_config_event_t(
         media::AudioIoConfigEvent aidl) {
     switch (aidl) {
@@ -365,1481 +241,6 @@
     return unexpected(BAD_VALUE);
 }
 
-namespace {
-
-namespace detail {
-using AudioChannelBitPair = std::pair<audio_channel_mask_t, int>;
-using AudioChannelBitPairs = std::vector<AudioChannelBitPair>;
-using AudioChannelPair = std::pair<audio_channel_mask_t, AudioChannelLayout>;
-using AudioChannelPairs = std::vector<AudioChannelPair>;
-using AudioDevicePair = std::pair<audio_devices_t, AudioDeviceDescription>;
-using AudioDevicePairs = std::vector<AudioDevicePair>;
-using AudioFormatPair = std::pair<audio_format_t, AudioFormatDescription>;
-using AudioFormatPairs = std::vector<AudioFormatPair>;
-}
-
-const detail::AudioChannelBitPairs& getInAudioChannelBits() {
-    static const detail::AudioChannelBitPairs pairs = {
-        { AUDIO_CHANNEL_IN_LEFT, AudioChannelLayout::CHANNEL_FRONT_LEFT },
-        { AUDIO_CHANNEL_IN_RIGHT, AudioChannelLayout::CHANNEL_FRONT_RIGHT },
-        // AUDIO_CHANNEL_IN_FRONT is at the end
-        { AUDIO_CHANNEL_IN_BACK, AudioChannelLayout::CHANNEL_BACK_CENTER },
-        // AUDIO_CHANNEL_IN_*_PROCESSED not supported
-        // AUDIO_CHANNEL_IN_PRESSURE not supported
-        // AUDIO_CHANNEL_IN_*_AXIS not supported
-        // AUDIO_CHANNEL_IN_VOICE_* not supported
-        { AUDIO_CHANNEL_IN_BACK_LEFT, AudioChannelLayout::CHANNEL_BACK_LEFT },
-        { AUDIO_CHANNEL_IN_BACK_RIGHT, AudioChannelLayout::CHANNEL_BACK_RIGHT },
-        { AUDIO_CHANNEL_IN_CENTER, AudioChannelLayout::CHANNEL_FRONT_CENTER },
-        { AUDIO_CHANNEL_IN_LOW_FREQUENCY, AudioChannelLayout::CHANNEL_LOW_FREQUENCY },
-        { AUDIO_CHANNEL_IN_TOP_LEFT, AudioChannelLayout::CHANNEL_TOP_SIDE_LEFT },
-        { AUDIO_CHANNEL_IN_TOP_RIGHT, AudioChannelLayout::CHANNEL_TOP_SIDE_RIGHT },
-        // When going from aidl to legacy, IN_CENTER is used
-        { AUDIO_CHANNEL_IN_FRONT, AudioChannelLayout::CHANNEL_FRONT_CENTER }
-    };
-    return pairs;
-}
-
-const detail::AudioChannelPairs& getInAudioChannelPairs() {
-    static const detail::AudioChannelPairs pairs = {
-#define DEFINE_INPUT_LAYOUT(n)                                                 \
-            {                                                                  \
-                AUDIO_CHANNEL_IN_##n,                                          \
-                AudioChannelLayout::make<AudioChannelLayout::Tag::layoutMask>( \
-                        AudioChannelLayout::LAYOUT_##n)                        \
-            }
-
-        DEFINE_INPUT_LAYOUT(MONO),
-        DEFINE_INPUT_LAYOUT(STEREO),
-        DEFINE_INPUT_LAYOUT(FRONT_BACK),
-        // AUDIO_CHANNEL_IN_6 not supported
-        DEFINE_INPUT_LAYOUT(2POINT0POINT2),
-        DEFINE_INPUT_LAYOUT(2POINT1POINT2),
-        DEFINE_INPUT_LAYOUT(3POINT0POINT2),
-        DEFINE_INPUT_LAYOUT(3POINT1POINT2),
-        DEFINE_INPUT_LAYOUT(5POINT1)
-#undef DEFINE_INPUT_LAYOUT
-    };
-    return pairs;
-}
-
-const detail::AudioChannelBitPairs& getOutAudioChannelBits() {
-    static const detail::AudioChannelBitPairs pairs = {
-#define DEFINE_OUTPUT_BITS(n)                                                  \
-            { AUDIO_CHANNEL_OUT_##n, AudioChannelLayout::CHANNEL_##n }
-
-        DEFINE_OUTPUT_BITS(FRONT_LEFT),
-        DEFINE_OUTPUT_BITS(FRONT_RIGHT),
-        DEFINE_OUTPUT_BITS(FRONT_CENTER),
-        DEFINE_OUTPUT_BITS(LOW_FREQUENCY),
-        DEFINE_OUTPUT_BITS(BACK_LEFT),
-        DEFINE_OUTPUT_BITS(BACK_RIGHT),
-        DEFINE_OUTPUT_BITS(FRONT_LEFT_OF_CENTER),
-        DEFINE_OUTPUT_BITS(FRONT_RIGHT_OF_CENTER),
-        DEFINE_OUTPUT_BITS(BACK_CENTER),
-        DEFINE_OUTPUT_BITS(SIDE_LEFT),
-        DEFINE_OUTPUT_BITS(SIDE_RIGHT),
-        DEFINE_OUTPUT_BITS(TOP_CENTER),
-        DEFINE_OUTPUT_BITS(TOP_FRONT_LEFT),
-        DEFINE_OUTPUT_BITS(TOP_FRONT_CENTER),
-        DEFINE_OUTPUT_BITS(TOP_FRONT_RIGHT),
-        DEFINE_OUTPUT_BITS(TOP_BACK_LEFT),
-        DEFINE_OUTPUT_BITS(TOP_BACK_CENTER),
-        DEFINE_OUTPUT_BITS(TOP_BACK_RIGHT),
-        DEFINE_OUTPUT_BITS(TOP_SIDE_LEFT),
-        DEFINE_OUTPUT_BITS(TOP_SIDE_RIGHT),
-        DEFINE_OUTPUT_BITS(BOTTOM_FRONT_LEFT),
-        DEFINE_OUTPUT_BITS(BOTTOM_FRONT_CENTER),
-        DEFINE_OUTPUT_BITS(BOTTOM_FRONT_RIGHT),
-        DEFINE_OUTPUT_BITS(LOW_FREQUENCY_2),
-        DEFINE_OUTPUT_BITS(FRONT_WIDE_LEFT),
-        DEFINE_OUTPUT_BITS(FRONT_WIDE_RIGHT),
-#undef DEFINE_OUTPUT_BITS
-        { AUDIO_CHANNEL_OUT_HAPTIC_A, AudioChannelLayout::CHANNEL_HAPTIC_A },
-        { AUDIO_CHANNEL_OUT_HAPTIC_B, AudioChannelLayout::CHANNEL_HAPTIC_B }
-    };
-    return pairs;
-}
-
-const detail::AudioChannelPairs& getOutAudioChannelPairs() {
-    static const detail::AudioChannelPairs pairs = {
-#define DEFINE_OUTPUT_LAYOUT(n)                                                \
-            {                                                                  \
-                AUDIO_CHANNEL_OUT_##n,                                         \
-                AudioChannelLayout::make<AudioChannelLayout::Tag::layoutMask>( \
-                        AudioChannelLayout::LAYOUT_##n)                        \
-            }
-
-        DEFINE_OUTPUT_LAYOUT(MONO),
-        DEFINE_OUTPUT_LAYOUT(STEREO),
-        DEFINE_OUTPUT_LAYOUT(2POINT1),
-        DEFINE_OUTPUT_LAYOUT(TRI),
-        DEFINE_OUTPUT_LAYOUT(TRI_BACK),
-        DEFINE_OUTPUT_LAYOUT(3POINT1),
-        DEFINE_OUTPUT_LAYOUT(2POINT0POINT2),
-        DEFINE_OUTPUT_LAYOUT(2POINT1POINT2),
-        DEFINE_OUTPUT_LAYOUT(3POINT0POINT2),
-        DEFINE_OUTPUT_LAYOUT(3POINT1POINT2),
-        DEFINE_OUTPUT_LAYOUT(QUAD),
-        DEFINE_OUTPUT_LAYOUT(QUAD_SIDE),
-        DEFINE_OUTPUT_LAYOUT(SURROUND),
-        DEFINE_OUTPUT_LAYOUT(PENTA),
-        DEFINE_OUTPUT_LAYOUT(5POINT1),
-        DEFINE_OUTPUT_LAYOUT(5POINT1_SIDE),
-        DEFINE_OUTPUT_LAYOUT(5POINT1POINT2),
-        DEFINE_OUTPUT_LAYOUT(5POINT1POINT4),
-        DEFINE_OUTPUT_LAYOUT(6POINT1),
-        DEFINE_OUTPUT_LAYOUT(7POINT1),
-        DEFINE_OUTPUT_LAYOUT(7POINT1POINT2),
-        DEFINE_OUTPUT_LAYOUT(7POINT1POINT4),
-        DEFINE_OUTPUT_LAYOUT(13POINT_360RA),
-        DEFINE_OUTPUT_LAYOUT(22POINT2),
-        DEFINE_OUTPUT_LAYOUT(MONO_HAPTIC_A),
-        DEFINE_OUTPUT_LAYOUT(STEREO_HAPTIC_A),
-        DEFINE_OUTPUT_LAYOUT(HAPTIC_AB),
-        DEFINE_OUTPUT_LAYOUT(MONO_HAPTIC_AB),
-        DEFINE_OUTPUT_LAYOUT(STEREO_HAPTIC_AB)
-#undef DEFINE_OUTPUT_LAYOUT
-    };
-    return pairs;
-}
-
-const detail::AudioChannelPairs& getVoiceAudioChannelPairs() {
-    static const detail::AudioChannelPairs pairs = {
-#define DEFINE_VOICE_LAYOUT(n)                                                 \
-            {                                                                  \
-                AUDIO_CHANNEL_IN_VOICE_##n,                                    \
-                AudioChannelLayout::make<AudioChannelLayout::Tag::voiceMask>(  \
-                        AudioChannelLayout::VOICE_##n)                         \
-            }
-        DEFINE_VOICE_LAYOUT(UPLINK_MONO),
-        DEFINE_VOICE_LAYOUT(DNLINK_MONO),
-        DEFINE_VOICE_LAYOUT(CALL_MONO)
-#undef DEFINE_VOICE_LAYOUT
-    };
-    return pairs;
-}
-
-AudioDeviceDescription make_AudioDeviceDescription(AudioDeviceType type,
-        const std::string& connection = "") {
-    AudioDeviceDescription result;
-    result.type = type;
-    result.connection = connection;
-    return result;
-}
-
-void append_AudioDeviceDescription(detail::AudioDevicePairs& pairs,
-        audio_devices_t inputType, audio_devices_t outputType,
-        AudioDeviceType inType, AudioDeviceType outType,
-        const std::string& connection = "") {
-    pairs.push_back(std::make_pair(inputType, make_AudioDeviceDescription(inType, connection)));
-    pairs.push_back(std::make_pair(outputType, make_AudioDeviceDescription(outType, connection)));
-}
-
-const detail::AudioDevicePairs& getAudioDevicePairs() {
-    static const detail::AudioDevicePairs pairs = []() {
-        detail::AudioDevicePairs pairs = {{
-            {
-                AUDIO_DEVICE_NONE, AudioDeviceDescription{}
-            },
-            {
-                AUDIO_DEVICE_OUT_EARPIECE, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_SPEAKER_EARPIECE)
-            },
-            {
-                AUDIO_DEVICE_OUT_SPEAKER, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_SPEAKER)
-            },
-            {
-                AUDIO_DEVICE_OUT_WIRED_HEADPHONE, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_HEADPHONE,
-                        AudioDeviceDescription::CONNECTION_ANALOG())
-            },
-            {
-                AUDIO_DEVICE_OUT_BLUETOOTH_SCO, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_DEVICE,
-                        AudioDeviceDescription::CONNECTION_BT_SCO())
-            },
-            {
-                AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_CARKIT,
-                        AudioDeviceDescription::CONNECTION_BT_SCO())
-            },
-            {
-                AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_HEADPHONE,
-                        AudioDeviceDescription::CONNECTION_BT_A2DP())
-            },
-            {
-                AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_SPEAKER,
-                        AudioDeviceDescription::CONNECTION_BT_A2DP())
-            },
-            {
-                AUDIO_DEVICE_OUT_TELEPHONY_TX, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_TELEPHONY_TX)
-            },
-            {
-                AUDIO_DEVICE_OUT_AUX_LINE, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_LINE_AUX)
-            },
-            {
-                AUDIO_DEVICE_OUT_SPEAKER_SAFE, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_SPEAKER_SAFE)
-            },
-            {
-                AUDIO_DEVICE_OUT_HEARING_AID, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_HEARING_AID,
-                        AudioDeviceDescription::CONNECTION_WIRELESS())
-            },
-            {
-                AUDIO_DEVICE_OUT_ECHO_CANCELLER, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_ECHO_CANCELLER)
-            },
-            {
-                AUDIO_DEVICE_OUT_BLE_SPEAKER, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_SPEAKER,
-                        AudioDeviceDescription::CONNECTION_BT_LE())
-            },
-            {
-                AUDIO_DEVICE_OUT_BLE_BROADCAST, make_AudioDeviceDescription(
-                        AudioDeviceType::OUT_BROADCAST,
-                        AudioDeviceDescription::CONNECTION_BT_LE())
-            },
-            // AUDIO_DEVICE_IN_AMBIENT and IN_COMMUNICATION are removed since they were deprecated.
-            {
-                AUDIO_DEVICE_IN_BUILTIN_MIC, make_AudioDeviceDescription(
-                        AudioDeviceType::IN_MICROPHONE)
-            },
-            {
-                AUDIO_DEVICE_IN_BACK_MIC, make_AudioDeviceDescription(
-                        AudioDeviceType::IN_MICROPHONE_BACK)
-            },
-            {
-                AUDIO_DEVICE_IN_TELEPHONY_RX, make_AudioDeviceDescription(
-                        AudioDeviceType::IN_TELEPHONY_RX)
-            },
-            {
-                AUDIO_DEVICE_IN_TV_TUNER, make_AudioDeviceDescription(
-                        AudioDeviceType::IN_TV_TUNER)
-            },
-            {
-                AUDIO_DEVICE_IN_LOOPBACK, make_AudioDeviceDescription(
-                        AudioDeviceType::IN_LOOPBACK)
-            },
-            {
-                AUDIO_DEVICE_IN_BLUETOOTH_BLE, make_AudioDeviceDescription(
-                        AudioDeviceType::IN_DEVICE,
-                        AudioDeviceDescription::CONNECTION_BT_LE())
-            },
-            {
-                AUDIO_DEVICE_IN_ECHO_REFERENCE, make_AudioDeviceDescription(
-                        AudioDeviceType::IN_ECHO_REFERENCE)
-            }
-        }};
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_DEFAULT, AUDIO_DEVICE_OUT_DEFAULT,
-                AudioDeviceType::IN_DEFAULT, AudioDeviceType::OUT_DEFAULT);
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_WIRED_HEADSET, AUDIO_DEVICE_OUT_WIRED_HEADSET,
-                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
-                AudioDeviceDescription::CONNECTION_ANALOG());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET, AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET,
-                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
-                AudioDeviceDescription::CONNECTION_BT_SCO());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_HDMI, AUDIO_DEVICE_OUT_HDMI,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_HDMI());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_REMOTE_SUBMIX, AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
-                AudioDeviceType::IN_SUBMIX, AudioDeviceType::OUT_SUBMIX);
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET, AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET,
-                AudioDeviceType::IN_DOCK, AudioDeviceType::OUT_DOCK,
-                AudioDeviceDescription::CONNECTION_ANALOG());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET, AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET,
-                AudioDeviceType::IN_DOCK, AudioDeviceType::OUT_DOCK,
-                AudioDeviceDescription::CONNECTION_USB());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_USB_ACCESSORY, AUDIO_DEVICE_OUT_USB_ACCESSORY,
-                AudioDeviceType::IN_ACCESSORY, AudioDeviceType::OUT_ACCESSORY,
-                AudioDeviceDescription::CONNECTION_USB());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_USB_DEVICE, AUDIO_DEVICE_OUT_USB_DEVICE,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_USB());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_FM_TUNER, AUDIO_DEVICE_OUT_FM,
-                AudioDeviceType::IN_FM_TUNER, AudioDeviceType::OUT_FM);
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_LINE, AUDIO_DEVICE_OUT_LINE,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_ANALOG());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_SPDIF, AUDIO_DEVICE_OUT_SPDIF,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_SPDIF());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_BLUETOOTH_A2DP, AUDIO_DEVICE_OUT_BLUETOOTH_A2DP,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_BT_A2DP());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_IP, AUDIO_DEVICE_OUT_IP,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_IP_V4());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_BUS, AUDIO_DEVICE_OUT_BUS,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_BUS());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_PROXY, AUDIO_DEVICE_OUT_PROXY,
-                AudioDeviceType::IN_AFE_PROXY, AudioDeviceType::OUT_AFE_PROXY);
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_USB_HEADSET, AUDIO_DEVICE_OUT_USB_HEADSET,
-                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
-                AudioDeviceDescription::CONNECTION_USB());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_HDMI_ARC, AUDIO_DEVICE_OUT_HDMI_ARC,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_HDMI_ARC());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_HDMI_EARC, AUDIO_DEVICE_OUT_HDMI_EARC,
-                AudioDeviceType::IN_DEVICE, AudioDeviceType::OUT_DEVICE,
-                AudioDeviceDescription::CONNECTION_HDMI_EARC());
-        append_AudioDeviceDescription(pairs,
-                AUDIO_DEVICE_IN_BLE_HEADSET, AUDIO_DEVICE_OUT_BLE_HEADSET,
-                AudioDeviceType::IN_HEADSET, AudioDeviceType::OUT_HEADSET,
-                AudioDeviceDescription::CONNECTION_BT_LE());
-        return pairs;
-    }();
-    return pairs;
-}
-
-AudioFormatDescription make_AudioFormatDescription(AudioFormatType type) {
-    AudioFormatDescription result;
-    result.type = type;
-    return result;
-}
-
-AudioFormatDescription make_AudioFormatDescription(PcmType pcm) {
-    auto result = make_AudioFormatDescription(AudioFormatType::PCM);
-    result.pcm = pcm;
-    return result;
-}
-
-AudioFormatDescription make_AudioFormatDescription(const std::string& encoding) {
-    AudioFormatDescription result;
-    result.encoding = encoding;
-    return result;
-}
-
-AudioFormatDescription make_AudioFormatDescription(PcmType transport,
-        const std::string& encoding) {
-    auto result = make_AudioFormatDescription(encoding);
-    result.pcm = transport;
-    return result;
-}
-
-const detail::AudioFormatPairs& getAudioFormatPairs() {
-    static const detail::AudioFormatPairs pairs = {{
-        {
-            AUDIO_FORMAT_INVALID,
-            make_AudioFormatDescription(AudioFormatType::SYS_RESERVED_INVALID)
-        },
-        {
-            AUDIO_FORMAT_DEFAULT, AudioFormatDescription{}
-        },
-        {
-            AUDIO_FORMAT_PCM_16_BIT, make_AudioFormatDescription(PcmType::INT_16_BIT)
-        },
-        {
-            AUDIO_FORMAT_PCM_8_BIT, make_AudioFormatDescription(PcmType::UINT_8_BIT)
-        },
-        {
-            AUDIO_FORMAT_PCM_32_BIT, make_AudioFormatDescription(PcmType::INT_32_BIT)
-        },
-        {
-            AUDIO_FORMAT_PCM_8_24_BIT, make_AudioFormatDescription(PcmType::FIXED_Q_8_24)
-        },
-        {
-            AUDIO_FORMAT_PCM_FLOAT, make_AudioFormatDescription(PcmType::FLOAT_32_BIT)
-        },
-        {
-            AUDIO_FORMAT_PCM_24_BIT_PACKED, make_AudioFormatDescription(PcmType::INT_24_BIT)
-        },
-        {
-            AUDIO_FORMAT_MP3, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_MPEG)
-        },
-        {
-            AUDIO_FORMAT_AMR_NB, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AMR_NB)
-        },
-        {
-            AUDIO_FORMAT_AMR_WB, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AMR_WB)
-        },
-        {
-            AUDIO_FORMAT_AAC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_MP4)
-        },
-        {
-            AUDIO_FORMAT_AAC_MAIN, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_MAIN)
-        },
-        {
-            AUDIO_FORMAT_AAC_LC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_LC)
-        },
-        {
-            AUDIO_FORMAT_AAC_SSR, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_SSR)
-        },
-        {
-            AUDIO_FORMAT_AAC_LTP, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_LTP)
-        },
-        {
-            AUDIO_FORMAT_AAC_HE_V1, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_HE_V1)
-        },
-        {
-            AUDIO_FORMAT_AAC_SCALABLE,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_SCALABLE)
-        },
-        {
-            AUDIO_FORMAT_AAC_ERLC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ERLC)
-        },
-        {
-            AUDIO_FORMAT_AAC_LD, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_LD)
-        },
-        {
-            AUDIO_FORMAT_AAC_HE_V2, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_HE_V2)
-        },
-        {
-            AUDIO_FORMAT_AAC_ELD, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ELD)
-        },
-        {
-            AUDIO_FORMAT_AAC_XHE, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_XHE)
-        },
-        // AUDIO_FORMAT_HE_AAC_V1 and HE_AAC_V2 are removed since they were deprecated long time
-        // ago.
-        {
-            AUDIO_FORMAT_VORBIS, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_VORBIS)
-        },
-        {
-            AUDIO_FORMAT_OPUS, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_OPUS)
-        },
-        {
-            AUDIO_FORMAT_AC3, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AC3)
-        },
-        {
-            AUDIO_FORMAT_E_AC3, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_EAC3)
-        },
-        {
-            AUDIO_FORMAT_E_AC3_JOC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_EAC3_JOC)
-        },
-        {
-            AUDIO_FORMAT_DTS, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DTS)
-        },
-        {
-            AUDIO_FORMAT_DTS_HD, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DTS_HD)
-        },
-        {
-            AUDIO_FORMAT_DTS_HD_MA, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DTS_HD_MA)
-        },
-        {
-            AUDIO_FORMAT_DTS_UHD, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DTS_UHD_P1)
-        },
-        {
-            AUDIO_FORMAT_DTS_UHD_P2, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DTS_UHD_P2)
-        },
-        // In the future, we would like to represent encapsulated bitstreams as
-        // nested AudioFormatDescriptions. The legacy 'AUDIO_FORMAT_IEC61937' type doesn't
-        // specify the format of the encapsulated bitstream.
-        {
-            AUDIO_FORMAT_IEC61937,
-            make_AudioFormatDescription(PcmType::INT_16_BIT, MEDIA_MIMETYPE_AUDIO_IEC61937)
-        },
-        {
-            AUDIO_FORMAT_DOLBY_TRUEHD,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DOLBY_TRUEHD)
-        },
-        {
-            AUDIO_FORMAT_EVRC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_EVRC)
-        },
-        {
-            AUDIO_FORMAT_EVRCB, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_EVRCB)
-        },
-        {
-            AUDIO_FORMAT_EVRCWB, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_EVRCWB)
-        },
-        {
-            AUDIO_FORMAT_EVRCNW, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_EVRCNW)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADIF, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADIF)
-        },
-        {
-            AUDIO_FORMAT_WMA, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_WMA)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_WMA_PRO, make_AudioFormatDescription("audio/x-ms-wma.pro")
-        },
-        {
-            AUDIO_FORMAT_AMR_WB_PLUS, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AMR_WB_PLUS)
-        },
-        {
-            AUDIO_FORMAT_MP2, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_II)
-        },
-        {
-            AUDIO_FORMAT_QCELP, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_QCELP)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_DSD, make_AudioFormatDescription("audio/vnd.sony.dsd")
-        },
-        {
-            AUDIO_FORMAT_FLAC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_FLAC)
-        },
-        {
-            AUDIO_FORMAT_ALAC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_ALAC)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_APE, make_AudioFormatDescription("audio/x-ape")
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_MAIN,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_MAIN)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_LC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_LC)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_SSR,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_SSR)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_LTP,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_LTP)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_HE_V1,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_HE_V1)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_SCALABLE,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_SCALABLE)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_ERLC,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_ERLC)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_LD, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_LD)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_HE_V2,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_HE_V2)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_ELD,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_ELD)
-        },
-        {
-            AUDIO_FORMAT_AAC_ADTS_XHE,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_ADTS_XHE)
-        },
-        {
-            // Note: not in the IANA registry. "vnd.octel.sbc" is not BT SBC.
-            AUDIO_FORMAT_SBC, make_AudioFormatDescription("audio/x-sbc")
-        },
-        {
-            AUDIO_FORMAT_APTX, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_APTX)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_APTX_HD, make_AudioFormatDescription("audio/vnd.qcom.aptx.hd")
-        },
-        {
-            AUDIO_FORMAT_AC4, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AC4)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_LDAC, make_AudioFormatDescription("audio/vnd.sony.ldac")
-        },
-        {
-            AUDIO_FORMAT_MAT, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DOLBY_MAT)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_MAT_1_0,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DOLBY_MAT + std::string(".1.0"))
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_MAT_2_0,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DOLBY_MAT + std::string(".2.0"))
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_MAT_2_1,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DOLBY_MAT + std::string(".2.1"))
-        },
-        {
-            AUDIO_FORMAT_AAC_LATM, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC)
-        },
-        {
-            AUDIO_FORMAT_AAC_LATM_LC, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_LATM_LC)
-        },
-        {
-            AUDIO_FORMAT_AAC_LATM_HE_V1,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_LATM_HE_V1)
-        },
-        {
-            AUDIO_FORMAT_AAC_LATM_HE_V2,
-            make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_AAC_LATM_HE_V2)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_CELT, make_AudioFormatDescription("audio/x-celt")
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_APTX_ADAPTIVE, make_AudioFormatDescription("audio/vnd.qcom.aptx.adaptive")
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_LHDC, make_AudioFormatDescription("audio/vnd.savitech.lhdc")
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_LHDC_LL, make_AudioFormatDescription("audio/vnd.savitech.lhdc.ll")
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_APTX_TWSP, make_AudioFormatDescription("audio/vnd.qcom.aptx.twsp")
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_LC3, make_AudioFormatDescription("audio/x-lc3")
-        },
-        {
-            AUDIO_FORMAT_MPEGH, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_MPEGH_MHM1)
-        },
-        {
-            AUDIO_FORMAT_MPEGH_BL_L3, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_MPEGH_BL_L3)
-        },
-        {
-            AUDIO_FORMAT_MPEGH_BL_L4, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_MPEGH_BL_L4)
-        },
-        {
-            AUDIO_FORMAT_MPEGH_LC_L3, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_MPEGH_LC_L3)
-        },
-        {
-            AUDIO_FORMAT_MPEGH_LC_L4, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_MPEGH_LC_L4)
-        },
-        {
-            AUDIO_FORMAT_IEC60958,
-            make_AudioFormatDescription(PcmType::INT_24_BIT, MEDIA_MIMETYPE_AUDIO_IEC60958)
-        },
-        {
-            AUDIO_FORMAT_DRA, make_AudioFormatDescription(MEDIA_MIMETYPE_AUDIO_DRA)
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_APTX_ADAPTIVE_QLEA,
-            make_AudioFormatDescription("audio/vnd.qcom.aptx.adaptive.r3")
-        },
-        {
-            // Note: not in the IANA registry.
-            AUDIO_FORMAT_APTX_ADAPTIVE_R4,
-            make_AudioFormatDescription("audio/vnd.qcom.aptx.adaptive.r4")
-        },
-    }};
-    return pairs;
-}
-
-template<typename S, typename T>
-std::unordered_map<S, T> make_DirectMap(const std::vector<std::pair<S, T>>& v) {
-    std::unordered_map<S, T> result(v.begin(), v.end());
-    LOG_ALWAYS_FATAL_IF(result.size() != v.size(), "Duplicate key elements detected");
-    return result;
-}
-
-template<typename S, typename T>
-std::unordered_map<S, T> make_DirectMap(
-        const std::vector<std::pair<S, T>>& v1, const std::vector<std::pair<S, T>>& v2) {
-    std::unordered_map<S, T> result(v1.begin(), v1.end());
-    LOG_ALWAYS_FATAL_IF(result.size() != v1.size(), "Duplicate key elements detected in v1");
-    result.insert(v2.begin(), v2.end());
-    LOG_ALWAYS_FATAL_IF(result.size() != v1.size() + v2.size(),
-            "Duplicate key elements detected in v1+v2");
-    return result;
-}
-
-template<typename S, typename T>
-std::unordered_map<T, S> make_ReverseMap(const std::vector<std::pair<S, T>>& v) {
-    std::unordered_map<T, S> result;
-    std::transform(v.begin(), v.end(), std::inserter(result, result.begin()),
-            [](const std::pair<S, T>& p) {
-                return std::make_pair(p.second, p.first);
-            });
-    LOG_ALWAYS_FATAL_IF(result.size() != v.size(), "Duplicate key elements detected");
-    return result;
-}
-
-}  // namespace
-
-audio_channel_mask_t aidl2legacy_AudioChannelLayout_layout_audio_channel_mask_t_bits(
-        int aidlLayout, bool isInput) {
-    auto& bitMapping = isInput ? getInAudioChannelBits() : getOutAudioChannelBits();
-    const int aidlLayoutInitial = aidlLayout; // for error message
-    audio_channel_mask_t legacy = AUDIO_CHANNEL_NONE;
-    for (const auto& bitPair : bitMapping) {
-        if ((aidlLayout & bitPair.second) == bitPair.second) {
-            legacy = static_cast<audio_channel_mask_t>(legacy | bitPair.first);
-            aidlLayout &= ~bitPair.second;
-            if (aidlLayout == 0) {
-                return legacy;
-            }
-        }
-    }
-    ALOGE("%s: aidl layout 0x%x contains bits 0x%x that have no match to legacy %s bits",
-            __func__, aidlLayoutInitial, aidlLayout, isInput ? "input" : "output");
-    return AUDIO_CHANNEL_NONE;
-}
-
-ConversionResult<audio_channel_mask_t> aidl2legacy_AudioChannelLayout_audio_channel_mask_t(
-        const AudioChannelLayout& aidl, bool isInput) {
-    using ReverseMap = std::unordered_map<AudioChannelLayout, audio_channel_mask_t>;
-    using Tag = AudioChannelLayout::Tag;
-    static const ReverseMap mIn = make_ReverseMap(getInAudioChannelPairs());
-    static const ReverseMap mOut = make_ReverseMap(getOutAudioChannelPairs());
-    static const ReverseMap mVoice = make_ReverseMap(getVoiceAudioChannelPairs());
-
-    auto convert = [](const AudioChannelLayout& aidl, const ReverseMap& m,
-            const char* func, const char* type) -> ConversionResult<audio_channel_mask_t> {
-        if (auto it = m.find(aidl); it != m.end()) {
-            return it->second;
-        } else {
-            ALOGW("%s: no legacy %s audio_channel_mask_t found for %s", func, type,
-                    aidl.toString().c_str());
-            return unexpected(BAD_VALUE);
-        }
-    };
-
-    switch (aidl.getTag()) {
-        case Tag::none:
-            return AUDIO_CHANNEL_NONE;
-        case Tag::invalid:
-            return AUDIO_CHANNEL_INVALID;
-        case Tag::indexMask:
-            // Index masks do not have pre-defined values.
-            if (const int bits = aidl.get<Tag::indexMask>();
-                    __builtin_popcount(bits) != 0 &&
-                    __builtin_popcount(bits) <= AUDIO_CHANNEL_COUNT_MAX) {
-                return audio_channel_mask_from_representation_and_bits(
-                        AUDIO_CHANNEL_REPRESENTATION_INDEX, bits);
-            } else {
-                ALOGE("%s: invalid indexMask value 0x%x in %s",
-                        __func__, bits, aidl.toString().c_str());
-                return unexpected(BAD_VALUE);
-            }
-        case Tag::layoutMask:
-            // The fast path is to find a direct match for some known layout mask.
-            if (const auto layoutMatch = convert(aidl, isInput ? mIn : mOut, __func__,
-                    isInput ? "input" : "output");
-                    layoutMatch.ok()) {
-                return layoutMatch;
-            }
-            // If a match for a predefined layout wasn't found, make a custom one from bits.
-            if (audio_channel_mask_t bitMask =
-                    aidl2legacy_AudioChannelLayout_layout_audio_channel_mask_t_bits(
-                            aidl.get<Tag::layoutMask>(), isInput);
-                    bitMask != AUDIO_CHANNEL_NONE) {
-                return bitMask;
-            }
-            return unexpected(BAD_VALUE);
-        case Tag::voiceMask:
-            return convert(aidl, mVoice, __func__, "voice");
-    }
-    ALOGE("%s: unexpected tag value %d", __func__, aidl.getTag());
-    return unexpected(BAD_VALUE);
-}
-
-int legacy2aidl_audio_channel_mask_t_bits_AudioChannelLayout_layout(
-        audio_channel_mask_t legacy, bool isInput) {
-    auto& bitMapping = isInput ? getInAudioChannelBits() : getOutAudioChannelBits();
-    const int legacyInitial = legacy; // for error message
-    int aidlLayout = 0;
-    for (const auto& bitPair : bitMapping) {
-        if ((legacy & bitPair.first) == bitPair.first) {
-            aidlLayout |= bitPair.second;
-            legacy = static_cast<audio_channel_mask_t>(legacy & ~bitPair.first);
-            if (legacy == 0) {
-                return aidlLayout;
-            }
-        }
-    }
-    ALOGE("%s: legacy %s audio_channel_mask_t 0x%x contains unrecognized bits 0x%x",
-            __func__, isInput ? "input" : "output", legacyInitial, legacy);
-    return 0;
-}
-
-ConversionResult<AudioChannelLayout> legacy2aidl_audio_channel_mask_t_AudioChannelLayout(
-        audio_channel_mask_t legacy, bool isInput) {
-    using DirectMap = std::unordered_map<audio_channel_mask_t, AudioChannelLayout>;
-    using Tag = AudioChannelLayout::Tag;
-    static const DirectMap mInAndVoice = make_DirectMap(
-            getInAudioChannelPairs(), getVoiceAudioChannelPairs());
-    static const DirectMap mOut = make_DirectMap(getOutAudioChannelPairs());
-
-    auto convert = [](const audio_channel_mask_t legacy, const DirectMap& m,
-            const char* func, const char* type) -> ConversionResult<AudioChannelLayout> {
-        if (auto it = m.find(legacy); it != m.end()) {
-            return it->second;
-        } else {
-            ALOGW("%s: no AudioChannelLayout found for legacy %s audio_channel_mask_t value 0x%x",
-                    func, type, legacy);
-            return unexpected(BAD_VALUE);
-        }
-    };
-
-    if (legacy == AUDIO_CHANNEL_NONE) {
-        return AudioChannelLayout{};
-    } else if (legacy == AUDIO_CHANNEL_INVALID) {
-        return AudioChannelLayout::make<Tag::invalid>(0);
-    }
-
-    const audio_channel_representation_t repr = audio_channel_mask_get_representation(legacy);
-    if (repr == AUDIO_CHANNEL_REPRESENTATION_INDEX) {
-        if (audio_channel_mask_is_valid(legacy)) {
-            const int indexMask = VALUE_OR_RETURN(
-                    convertIntegral<int>(audio_channel_mask_get_bits(legacy)));
-            return AudioChannelLayout::make<Tag::indexMask>(indexMask);
-        } else {
-            ALOGE("%s: legacy audio_channel_mask_t value 0x%x is invalid", __func__, legacy);
-            return unexpected(BAD_VALUE);
-        }
-    } else if (repr == AUDIO_CHANNEL_REPRESENTATION_POSITION) {
-        // The fast path is to find a direct match for some known layout mask.
-        if (const auto layoutMatch = convert(legacy, isInput ? mInAndVoice : mOut, __func__,
-                isInput ? "input / voice" : "output");
-                layoutMatch.ok()) {
-            return layoutMatch;
-        }
-        // If a match for a predefined layout wasn't found, make a custom one from bits,
-        // rejecting those with voice channel bits.
-        if (!isInput ||
-                (legacy & (AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK)) == 0) {
-            if (int bitMaskLayout =
-                    legacy2aidl_audio_channel_mask_t_bits_AudioChannelLayout_layout(
-                            legacy, isInput);
-                    bitMaskLayout != 0) {
-                return AudioChannelLayout::make<Tag::layoutMask>(bitMaskLayout);
-            }
-        } else {
-            ALOGE("%s: legacy audio_channel_mask_t value 0x%x contains voice bits",
-                    __func__, legacy);
-        }
-        return unexpected(BAD_VALUE);
-    }
-
-    ALOGE("%s: unknown representation %d in audio_channel_mask_t value 0x%x",
-            __func__, repr, legacy);
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_devices_t> aidl2legacy_AudioDeviceDescription_audio_devices_t(
-        const AudioDeviceDescription& aidl) {
-    static const std::unordered_map<AudioDeviceDescription, audio_devices_t> m =
-            make_ReverseMap(getAudioDevicePairs());
-    if (auto it = m.find(aidl); it != m.end()) {
-        return it->second;
-    } else {
-        ALOGE("%s: no legacy audio_devices_t found for %s", __func__, aidl.toString().c_str());
-        return unexpected(BAD_VALUE);
-    }
-}
-
-ConversionResult<AudioDeviceDescription> legacy2aidl_audio_devices_t_AudioDeviceDescription(
-        audio_devices_t legacy) {
-    static const std::unordered_map<audio_devices_t, AudioDeviceDescription> m =
-            make_DirectMap(getAudioDevicePairs());
-    if (auto it = m.find(legacy); it != m.end()) {
-        return it->second;
-    } else {
-        ALOGE("%s: no AudioDeviceDescription found for legacy audio_devices_t value 0x%x",
-                __func__, legacy);
-        return unexpected(BAD_VALUE);
-    }
-}
-
-status_t aidl2legacy_AudioDevice_audio_device(
-        const AudioDevice& aidl,
-        audio_devices_t* legacyType, char* legacyAddress) {
-    *legacyType = VALUE_OR_RETURN_STATUS(
-            aidl2legacy_AudioDeviceDescription_audio_devices_t(aidl.type));
-    return aidl2legacy_string(
-                    aidl.address.get<AudioDeviceAddress::id>(),
-                    legacyAddress, AUDIO_DEVICE_MAX_ADDRESS_LEN);
-}
-
-status_t aidl2legacy_AudioDevice_audio_device(
-        const AudioDevice& aidl,
-        audio_devices_t* legacyType, String8* legacyAddress) {
-    *legacyType = VALUE_OR_RETURN_STATUS(
-            aidl2legacy_AudioDeviceDescription_audio_devices_t(aidl.type));
-    *legacyAddress = VALUE_OR_RETURN_STATUS(aidl2legacy_string_view_String8(
-                    aidl.address.get<AudioDeviceAddress::id>()));
-    return OK;
-}
-
-status_t aidl2legacy_AudioDevice_audio_device(
-        const AudioDevice& aidl,
-        audio_devices_t* legacyType, std::string* legacyAddress) {
-    *legacyType = VALUE_OR_RETURN_STATUS(
-            aidl2legacy_AudioDeviceDescription_audio_devices_t(aidl.type));
-    *legacyAddress = aidl.address.get<AudioDeviceAddress::id>();
-    return OK;
-}
-
-ConversionResult<AudioDevice> legacy2aidl_audio_device_AudioDevice(
-        audio_devices_t legacyType, const char* legacyAddress) {
-    AudioDevice aidl;
-    aidl.type = VALUE_OR_RETURN(
-            legacy2aidl_audio_devices_t_AudioDeviceDescription(legacyType));
-    const std::string aidl_id = VALUE_OR_RETURN(
-            legacy2aidl_string(legacyAddress, AUDIO_DEVICE_MAX_ADDRESS_LEN));
-    aidl.address = AudioDeviceAddress::make<AudioDeviceAddress::id>(aidl_id);
-    return aidl;
-}
-
-ConversionResult<AudioDevice>
-legacy2aidl_audio_device_AudioDevice(
-        audio_devices_t legacyType, const String8& legacyAddress) {
-    AudioDevice aidl;
-    aidl.type = VALUE_OR_RETURN(
-            legacy2aidl_audio_devices_t_AudioDeviceDescription(legacyType));
-    const std::string aidl_id = VALUE_OR_RETURN(
-            legacy2aidl_String8_string(legacyAddress));
-    aidl.address = AudioDeviceAddress::make<AudioDeviceAddress::id>(aidl_id);
-    return aidl;
-}
-
-ConversionResult<audio_format_t> aidl2legacy_AudioFormatDescription_audio_format_t(
-        const AudioFormatDescription& aidl) {
-    static const std::unordered_map<AudioFormatDescription, audio_format_t> m =
-            make_ReverseMap(getAudioFormatPairs());
-    if (auto it = m.find(aidl); it != m.end()) {
-        return it->second;
-    } else {
-        ALOGE("%s: no legacy audio_format_t found for %s", __func__, aidl.toString().c_str());
-        return unexpected(BAD_VALUE);
-    }
-}
-
-ConversionResult<AudioFormatDescription> legacy2aidl_audio_format_t_AudioFormatDescription(
-        audio_format_t legacy) {
-    static const std::unordered_map<audio_format_t, AudioFormatDescription> m =
-            make_DirectMap(getAudioFormatPairs());
-    if (auto it = m.find(legacy); it != m.end()) {
-        return it->second;
-    } else {
-        ALOGE("%s: no AudioFormatDescription found for legacy audio_format_t value 0x%x",
-                __func__, legacy);
-        return unexpected(BAD_VALUE);
-    }
-}
-
-ConversionResult<audio_gain_mode_t> aidl2legacy_AudioGainMode_audio_gain_mode_t(
-        AudioGainMode aidl) {
-    switch (aidl) {
-        case AudioGainMode::JOINT:
-            return AUDIO_GAIN_MODE_JOINT;
-        case AudioGainMode::CHANNELS:
-            return AUDIO_GAIN_MODE_CHANNELS;
-        case AudioGainMode::RAMP:
-            return AUDIO_GAIN_MODE_RAMP;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioGainMode> legacy2aidl_audio_gain_mode_t_AudioGainMode(
-        audio_gain_mode_t legacy) {
-    switch (legacy) {
-        case AUDIO_GAIN_MODE_JOINT:
-            return AudioGainMode::JOINT;
-        case AUDIO_GAIN_MODE_CHANNELS:
-            return AudioGainMode::CHANNELS;
-        case AUDIO_GAIN_MODE_RAMP:
-            return AudioGainMode::RAMP;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_gain_mode_t> aidl2legacy_int32_t_audio_gain_mode_t_mask(int32_t aidl) {
-    return convertBitmask<audio_gain_mode_t, int32_t, audio_gain_mode_t, AudioGainMode>(
-            aidl, aidl2legacy_AudioGainMode_audio_gain_mode_t,
-            // AudioGainMode is index-based.
-            indexToEnum_index<AudioGainMode>,
-            // AUDIO_GAIN_MODE_* constants are mask-based.
-            enumToMask_bitmask<audio_gain_mode_t, audio_gain_mode_t>);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_gain_mode_t_int32_t_mask(audio_gain_mode_t legacy) {
-    return convertBitmask<int32_t, audio_gain_mode_t, AudioGainMode, audio_gain_mode_t>(
-            legacy, legacy2aidl_audio_gain_mode_t_AudioGainMode,
-            // AUDIO_GAIN_MODE_* constants are mask-based.
-            indexToEnum_bitmask<audio_gain_mode_t>,
-            // AudioGainMode is index-based.
-            enumToMask_index<int32_t, AudioGainMode>);
-}
-
-ConversionResult<audio_gain_config> aidl2legacy_AudioGainConfig_audio_gain_config(
-        const AudioGainConfig& aidl, bool isInput) {
-    audio_gain_config legacy;
-    legacy.index = VALUE_OR_RETURN(convertIntegral<int>(aidl.index));
-    legacy.mode = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_gain_mode_t_mask(aidl.mode));
-    legacy.channel_mask = VALUE_OR_RETURN(
-            aidl2legacy_AudioChannelLayout_audio_channel_mask_t(aidl.channelMask, isInput));
-    const bool isJoint = bitmaskIsSet(aidl.mode, AudioGainMode::JOINT);
-    size_t numValues = isJoint ? 1
-                               : isInput ? audio_channel_count_from_in_mask(legacy.channel_mask)
-                                         : audio_channel_count_from_out_mask(legacy.channel_mask);
-    if (aidl.values.size() != numValues || aidl.values.size() > std::size(legacy.values)) {
-        return unexpected(BAD_VALUE);
-    }
-    for (size_t i = 0; i < numValues; ++i) {
-        legacy.values[i] = VALUE_OR_RETURN(convertIntegral<int>(aidl.values[i]));
-    }
-    legacy.ramp_duration_ms = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.rampDurationMs));
-    return legacy;
-}
-
-ConversionResult<AudioGainConfig> legacy2aidl_audio_gain_config_AudioGainConfig(
-        const audio_gain_config& legacy, bool isInput) {
-    AudioGainConfig aidl;
-    aidl.index = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.index));
-    aidl.mode = VALUE_OR_RETURN(legacy2aidl_audio_gain_mode_t_int32_t_mask(legacy.mode));
-    aidl.channelMask = VALUE_OR_RETURN(
-            legacy2aidl_audio_channel_mask_t_AudioChannelLayout(legacy.channel_mask, isInput));
-    const bool isJoint = (legacy.mode & AUDIO_GAIN_MODE_JOINT) != 0;
-    size_t numValues = isJoint ? 1
-                               : isInput ? audio_channel_count_from_in_mask(legacy.channel_mask)
-                                         : audio_channel_count_from_out_mask(legacy.channel_mask);
-    aidl.values.resize(numValues);
-    for (size_t i = 0; i < numValues; ++i) {
-        aidl.values[i] = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.values[i]));
-    }
-    aidl.rampDurationMs = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.ramp_duration_ms));
-    return aidl;
-}
-
-ConversionResult<audio_input_flags_t> aidl2legacy_AudioInputFlags_audio_input_flags_t(
-        AudioInputFlags aidl) {
-    switch (aidl) {
-        case AudioInputFlags::FAST:
-            return AUDIO_INPUT_FLAG_FAST;
-        case AudioInputFlags::HW_HOTWORD:
-            return AUDIO_INPUT_FLAG_HW_HOTWORD;
-        case AudioInputFlags::RAW:
-            return AUDIO_INPUT_FLAG_RAW;
-        case AudioInputFlags::SYNC:
-            return AUDIO_INPUT_FLAG_SYNC;
-        case AudioInputFlags::MMAP_NOIRQ:
-            return AUDIO_INPUT_FLAG_MMAP_NOIRQ;
-        case AudioInputFlags::VOIP_TX:
-            return AUDIO_INPUT_FLAG_VOIP_TX;
-        case AudioInputFlags::HW_AV_SYNC:
-            return AUDIO_INPUT_FLAG_HW_AV_SYNC;
-        case AudioInputFlags::DIRECT:
-            return AUDIO_INPUT_FLAG_DIRECT;
-        case AudioInputFlags::ULTRASOUND:
-            return AUDIO_INPUT_FLAG_ULTRASOUND;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioInputFlags> legacy2aidl_audio_input_flags_t_AudioInputFlags(
-        audio_input_flags_t legacy) {
-    switch (legacy) {
-        case AUDIO_INPUT_FLAG_NONE:
-            break; // shouldn't get here. must be listed  -Werror,-Wswitch
-        case AUDIO_INPUT_FLAG_FAST:
-            return AudioInputFlags::FAST;
-        case AUDIO_INPUT_FLAG_HW_HOTWORD:
-            return AudioInputFlags::HW_HOTWORD;
-        case AUDIO_INPUT_FLAG_RAW:
-            return AudioInputFlags::RAW;
-        case AUDIO_INPUT_FLAG_SYNC:
-            return AudioInputFlags::SYNC;
-        case AUDIO_INPUT_FLAG_MMAP_NOIRQ:
-            return AudioInputFlags::MMAP_NOIRQ;
-        case AUDIO_INPUT_FLAG_VOIP_TX:
-            return AudioInputFlags::VOIP_TX;
-        case AUDIO_INPUT_FLAG_HW_AV_SYNC:
-            return AudioInputFlags::HW_AV_SYNC;
-        case AUDIO_INPUT_FLAG_DIRECT:
-            return AudioInputFlags::DIRECT;
-        case AUDIO_INPUT_FLAG_ULTRASOUND:
-            return AudioInputFlags::ULTRASOUND;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_output_flags_t> aidl2legacy_AudioOutputFlags_audio_output_flags_t(
-        AudioOutputFlags aidl) {
-    switch (aidl) {
-        case AudioOutputFlags::DIRECT:
-            return AUDIO_OUTPUT_FLAG_DIRECT;
-        case AudioOutputFlags::PRIMARY:
-            return AUDIO_OUTPUT_FLAG_PRIMARY;
-        case AudioOutputFlags::FAST:
-            return AUDIO_OUTPUT_FLAG_FAST;
-        case AudioOutputFlags::DEEP_BUFFER:
-            return AUDIO_OUTPUT_FLAG_DEEP_BUFFER;
-        case AudioOutputFlags::COMPRESS_OFFLOAD:
-            return AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD;
-        case AudioOutputFlags::NON_BLOCKING:
-            return AUDIO_OUTPUT_FLAG_NON_BLOCKING;
-        case AudioOutputFlags::HW_AV_SYNC:
-            return AUDIO_OUTPUT_FLAG_HW_AV_SYNC;
-        case AudioOutputFlags::TTS:
-            return AUDIO_OUTPUT_FLAG_TTS;
-        case AudioOutputFlags::RAW:
-            return AUDIO_OUTPUT_FLAG_RAW;
-        case AudioOutputFlags::SYNC:
-            return AUDIO_OUTPUT_FLAG_SYNC;
-        case AudioOutputFlags::IEC958_NONAUDIO:
-            return AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO;
-        case AudioOutputFlags::DIRECT_PCM:
-            return AUDIO_OUTPUT_FLAG_DIRECT_PCM;
-        case AudioOutputFlags::MMAP_NOIRQ:
-            return AUDIO_OUTPUT_FLAG_MMAP_NOIRQ;
-        case AudioOutputFlags::VOIP_RX:
-            return AUDIO_OUTPUT_FLAG_VOIP_RX;
-        case AudioOutputFlags::INCALL_MUSIC:
-            return AUDIO_OUTPUT_FLAG_INCALL_MUSIC;
-        case AudioOutputFlags::GAPLESS_OFFLOAD:
-            return AUDIO_OUTPUT_FLAG_GAPLESS_OFFLOAD;
-        case AudioOutputFlags::ULTRASOUND:
-            return AUDIO_OUTPUT_FLAG_ULTRASOUND;
-        case AudioOutputFlags::SPATIALIZER:
-            return AUDIO_OUTPUT_FLAG_SPATIALIZER;
-        case AudioOutputFlags::BIT_PERFECT:
-            return AUDIO_OUTPUT_FLAG_BIT_PERFECT;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioOutputFlags> legacy2aidl_audio_output_flags_t_AudioOutputFlags(
-        audio_output_flags_t legacy) {
-    switch (legacy) {
-        case AUDIO_OUTPUT_FLAG_NONE:
-            break; // shouldn't get here. must be listed  -Werror,-Wswitch
-        case AUDIO_OUTPUT_FLAG_DIRECT:
-            return AudioOutputFlags::DIRECT;
-        case AUDIO_OUTPUT_FLAG_PRIMARY:
-            return AudioOutputFlags::PRIMARY;
-        case AUDIO_OUTPUT_FLAG_FAST:
-            return AudioOutputFlags::FAST;
-        case AUDIO_OUTPUT_FLAG_DEEP_BUFFER:
-            return AudioOutputFlags::DEEP_BUFFER;
-        case AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD:
-            return AudioOutputFlags::COMPRESS_OFFLOAD;
-        case AUDIO_OUTPUT_FLAG_NON_BLOCKING:
-            return AudioOutputFlags::NON_BLOCKING;
-        case AUDIO_OUTPUT_FLAG_HW_AV_SYNC:
-            return AudioOutputFlags::HW_AV_SYNC;
-        case AUDIO_OUTPUT_FLAG_TTS:
-            return AudioOutputFlags::TTS;
-        case AUDIO_OUTPUT_FLAG_RAW:
-            return AudioOutputFlags::RAW;
-        case AUDIO_OUTPUT_FLAG_SYNC:
-            return AudioOutputFlags::SYNC;
-        case AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO:
-            return AudioOutputFlags::IEC958_NONAUDIO;
-        case AUDIO_OUTPUT_FLAG_DIRECT_PCM:
-            return AudioOutputFlags::DIRECT_PCM;
-        case AUDIO_OUTPUT_FLAG_MMAP_NOIRQ:
-            return AudioOutputFlags::MMAP_NOIRQ;
-        case AUDIO_OUTPUT_FLAG_VOIP_RX:
-            return AudioOutputFlags::VOIP_RX;
-        case AUDIO_OUTPUT_FLAG_INCALL_MUSIC:
-            return AudioOutputFlags::INCALL_MUSIC;
-        case AUDIO_OUTPUT_FLAG_GAPLESS_OFFLOAD:
-            return AudioOutputFlags::GAPLESS_OFFLOAD;
-        case AUDIO_OUTPUT_FLAG_ULTRASOUND:
-            return AudioOutputFlags::ULTRASOUND;
-        case AUDIO_OUTPUT_FLAG_SPATIALIZER:
-            return AudioOutputFlags::SPATIALIZER;
-        case AUDIO_OUTPUT_FLAG_BIT_PERFECT:
-            return AudioOutputFlags::BIT_PERFECT;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_input_flags_t> aidl2legacy_int32_t_audio_input_flags_t_mask(
-        int32_t aidl) {
-    using LegacyMask = std::underlying_type_t<audio_input_flags_t>;
-
-    LegacyMask converted = VALUE_OR_RETURN(
-            (convertBitmask<LegacyMask, int32_t, audio_input_flags_t, AudioInputFlags>(
-                    aidl, aidl2legacy_AudioInputFlags_audio_input_flags_t,
-                    indexToEnum_index<AudioInputFlags>,
-                    enumToMask_bitmask<LegacyMask, audio_input_flags_t>)));
-    return static_cast<audio_input_flags_t>(converted);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_input_flags_t_int32_t_mask(
-        audio_input_flags_t legacy) {
-    using LegacyMask = std::underlying_type_t<audio_input_flags_t>;
-
-    LegacyMask legacyMask = static_cast<LegacyMask>(legacy);
-    return convertBitmask<int32_t, LegacyMask, AudioInputFlags, audio_input_flags_t>(
-            legacyMask, legacy2aidl_audio_input_flags_t_AudioInputFlags,
-            indexToEnum_bitmask<audio_input_flags_t>,
-            enumToMask_index<int32_t, AudioInputFlags>);
-}
-
-ConversionResult<audio_output_flags_t> aidl2legacy_int32_t_audio_output_flags_t_mask(
-        int32_t aidl) {
-    return convertBitmask<audio_output_flags_t,
-            int32_t,
-            audio_output_flags_t,
-            AudioOutputFlags>(
-            aidl, aidl2legacy_AudioOutputFlags_audio_output_flags_t,
-            indexToEnum_index<AudioOutputFlags>,
-            enumToMask_bitmask<audio_output_flags_t, audio_output_flags_t>);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_output_flags_t_int32_t_mask(
-        audio_output_flags_t legacy) {
-    using LegacyMask = std::underlying_type_t<audio_output_flags_t>;
-
-    LegacyMask legacyMask = static_cast<LegacyMask>(legacy);
-    return convertBitmask<int32_t, LegacyMask, AudioOutputFlags, audio_output_flags_t>(
-            legacyMask, legacy2aidl_audio_output_flags_t_AudioOutputFlags,
-            indexToEnum_bitmask<audio_output_flags_t>,
-            enumToMask_index<int32_t, AudioOutputFlags>);
-}
-
-ConversionResult<audio_io_flags> aidl2legacy_AudioIoFlags_audio_io_flags(
-        const AudioIoFlags& aidl, bool isInput) {
-    audio_io_flags legacy;
-    if (isInput) {
-        legacy.input = VALUE_OR_RETURN(
-                aidl2legacy_int32_t_audio_input_flags_t_mask(
-                        VALUE_OR_RETURN(UNION_GET(aidl, input))));
-    } else {
-        legacy.output = VALUE_OR_RETURN(
-                aidl2legacy_int32_t_audio_output_flags_t_mask(
-                        VALUE_OR_RETURN(UNION_GET(aidl, output))));
-    }
-    return legacy;
-}
-
-ConversionResult<AudioIoFlags> legacy2aidl_audio_io_flags_AudioIoFlags(
-        const audio_io_flags& legacy, bool isInput) {
-    AudioIoFlags aidl;
-    if (isInput) {
-        UNION_SET(aidl, input,
-                VALUE_OR_RETURN(legacy2aidl_audio_input_flags_t_int32_t_mask(legacy.input)));
-    } else {
-        UNION_SET(aidl, output,
-                VALUE_OR_RETURN(legacy2aidl_audio_output_flags_t_int32_t_mask(legacy.output)));
-    }
-    return aidl;
-}
-
-ConversionResult<audio_port_config_device_ext>
-aidl2legacy_AudioPortDeviceExt_audio_port_config_device_ext(
-        const AudioPortDeviceExt& aidl, const media::AudioPortDeviceExtSys& aidlDeviceExt) {
-    audio_port_config_device_ext legacy;
-    legacy.hw_module = VALUE_OR_RETURN(
-            aidl2legacy_int32_t_audio_module_handle_t(aidlDeviceExt.hwModule));
-    RETURN_IF_ERROR(aidl2legacy_AudioDevice_audio_device(
-                    aidl.device, &legacy.type, legacy.address));
-    return legacy;
-}
-
-status_t legacy2aidl_audio_port_config_device_ext_AudioPortDeviceExt(
-        const audio_port_config_device_ext& legacy,
-        AudioPortDeviceExt* aidl, media::AudioPortDeviceExtSys* aidlDeviceExt) {
-    aidlDeviceExt->hwModule = VALUE_OR_RETURN_STATUS(
-            legacy2aidl_audio_module_handle_t_int32_t(legacy.hw_module));
-    aidl->device = VALUE_OR_RETURN_STATUS(
-            legacy2aidl_audio_device_AudioDevice(legacy.type, legacy.address));
-    return OK;
-}
-
-ConversionResult<audio_stream_type_t> aidl2legacy_AudioStreamType_audio_stream_type_t(
-        AudioStreamType aidl) {
-    switch (aidl) {
-        case AudioStreamType::INVALID:
-            break;  // return error
-        case AudioStreamType::SYS_RESERVED_DEFAULT:
-            return AUDIO_STREAM_DEFAULT;
-        case AudioStreamType::VOICE_CALL:
-            return AUDIO_STREAM_VOICE_CALL;
-        case AudioStreamType::SYSTEM:
-            return AUDIO_STREAM_SYSTEM;
-        case AudioStreamType::RING:
-            return AUDIO_STREAM_RING;
-        case AudioStreamType::MUSIC:
-            return AUDIO_STREAM_MUSIC;
-        case AudioStreamType::ALARM:
-            return AUDIO_STREAM_ALARM;
-        case AudioStreamType::NOTIFICATION:
-            return AUDIO_STREAM_NOTIFICATION;
-        case AudioStreamType::BLUETOOTH_SCO:
-            return AUDIO_STREAM_BLUETOOTH_SCO;
-        case AudioStreamType::ENFORCED_AUDIBLE:
-            return AUDIO_STREAM_ENFORCED_AUDIBLE;
-        case AudioStreamType::DTMF:
-            return AUDIO_STREAM_DTMF;
-        case AudioStreamType::TTS:
-            return AUDIO_STREAM_TTS;
-        case AudioStreamType::ACCESSIBILITY:
-            return AUDIO_STREAM_ACCESSIBILITY;
-        case AudioStreamType::ASSISTANT:
-            return AUDIO_STREAM_ASSISTANT;
-        case AudioStreamType::SYS_RESERVED_REROUTING:
-            return AUDIO_STREAM_REROUTING;
-        case AudioStreamType::SYS_RESERVED_PATCH:
-            return AUDIO_STREAM_PATCH;
-        case AudioStreamType::CALL_ASSISTANT:
-            return AUDIO_STREAM_CALL_ASSISTANT;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioStreamType> legacy2aidl_audio_stream_type_t_AudioStreamType(
-        audio_stream_type_t legacy) {
-    switch (legacy) {
-        case AUDIO_STREAM_DEFAULT:
-            return AudioStreamType::SYS_RESERVED_DEFAULT;
-        case AUDIO_STREAM_VOICE_CALL:
-            return AudioStreamType::VOICE_CALL;
-        case AUDIO_STREAM_SYSTEM:
-            return AudioStreamType::SYSTEM;
-        case AUDIO_STREAM_RING:
-            return AudioStreamType::RING;
-        case AUDIO_STREAM_MUSIC:
-            return AudioStreamType::MUSIC;
-        case AUDIO_STREAM_ALARM:
-            return AudioStreamType::ALARM;
-        case AUDIO_STREAM_NOTIFICATION:
-            return AudioStreamType::NOTIFICATION;
-        case AUDIO_STREAM_BLUETOOTH_SCO:
-            return AudioStreamType::BLUETOOTH_SCO;
-        case AUDIO_STREAM_ENFORCED_AUDIBLE:
-            return AudioStreamType::ENFORCED_AUDIBLE;
-        case AUDIO_STREAM_DTMF:
-            return AudioStreamType::DTMF;
-        case AUDIO_STREAM_TTS:
-            return AudioStreamType::TTS;
-        case AUDIO_STREAM_ACCESSIBILITY:
-            return AudioStreamType::ACCESSIBILITY;
-        case AUDIO_STREAM_ASSISTANT:
-            return AudioStreamType::ASSISTANT;
-        case AUDIO_STREAM_REROUTING:
-            return AudioStreamType::SYS_RESERVED_REROUTING;
-        case AUDIO_STREAM_PATCH:
-            return AudioStreamType::SYS_RESERVED_PATCH;
-        case AUDIO_STREAM_CALL_ASSISTANT:
-            return AudioStreamType::CALL_ASSISTANT;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_source_t> aidl2legacy_AudioSource_audio_source_t(
-        AudioSource aidl) {
-    switch (aidl) {
-        case AudioSource::SYS_RESERVED_INVALID:
-            return AUDIO_SOURCE_INVALID;
-        case AudioSource::DEFAULT:
-            return AUDIO_SOURCE_DEFAULT;
-        case AudioSource::MIC:
-            return AUDIO_SOURCE_MIC;
-        case AudioSource::VOICE_UPLINK:
-            return AUDIO_SOURCE_VOICE_UPLINK;
-        case AudioSource::VOICE_DOWNLINK:
-            return AUDIO_SOURCE_VOICE_DOWNLINK;
-        case AudioSource::VOICE_CALL:
-            return AUDIO_SOURCE_VOICE_CALL;
-        case AudioSource::CAMCORDER:
-            return AUDIO_SOURCE_CAMCORDER;
-        case AudioSource::VOICE_RECOGNITION:
-            return AUDIO_SOURCE_VOICE_RECOGNITION;
-        case AudioSource::VOICE_COMMUNICATION:
-            return AUDIO_SOURCE_VOICE_COMMUNICATION;
-        case AudioSource::REMOTE_SUBMIX:
-            return AUDIO_SOURCE_REMOTE_SUBMIX;
-        case AudioSource::UNPROCESSED:
-            return AUDIO_SOURCE_UNPROCESSED;
-        case AudioSource::VOICE_PERFORMANCE:
-            return AUDIO_SOURCE_VOICE_PERFORMANCE;
-        case AudioSource::ULTRASOUND:
-            return AUDIO_SOURCE_ULTRASOUND;
-        case AudioSource::ECHO_REFERENCE:
-            return AUDIO_SOURCE_ECHO_REFERENCE;
-        case AudioSource::FM_TUNER:
-            return AUDIO_SOURCE_FM_TUNER;
-        case AudioSource::HOTWORD:
-            return AUDIO_SOURCE_HOTWORD;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioSource> legacy2aidl_audio_source_t_AudioSource(
-        audio_source_t legacy) {
-    switch (legacy) {
-        case AUDIO_SOURCE_INVALID:
-            return AudioSource::SYS_RESERVED_INVALID;
-        case AUDIO_SOURCE_DEFAULT:
-            return AudioSource::DEFAULT;
-        case AUDIO_SOURCE_MIC:
-            return AudioSource::MIC;
-        case AUDIO_SOURCE_VOICE_UPLINK:
-            return AudioSource::VOICE_UPLINK;
-        case AUDIO_SOURCE_VOICE_DOWNLINK:
-            return AudioSource::VOICE_DOWNLINK;
-        case AUDIO_SOURCE_VOICE_CALL:
-            return AudioSource::VOICE_CALL;
-        case AUDIO_SOURCE_CAMCORDER:
-            return AudioSource::CAMCORDER;
-        case AUDIO_SOURCE_VOICE_RECOGNITION:
-            return AudioSource::VOICE_RECOGNITION;
-        case AUDIO_SOURCE_VOICE_COMMUNICATION:
-            return AudioSource::VOICE_COMMUNICATION;
-        case AUDIO_SOURCE_REMOTE_SUBMIX:
-            return AudioSource::REMOTE_SUBMIX;
-        case AUDIO_SOURCE_UNPROCESSED:
-            return AudioSource::UNPROCESSED;
-        case AUDIO_SOURCE_VOICE_PERFORMANCE:
-            return AudioSource::VOICE_PERFORMANCE;
-        case AUDIO_SOURCE_ULTRASOUND:
-            return AudioSource::ULTRASOUND;
-        case AUDIO_SOURCE_ECHO_REFERENCE:
-            return AudioSource::ECHO_REFERENCE;
-        case AUDIO_SOURCE_FM_TUNER:
-            return AudioSource::FM_TUNER;
-        case AUDIO_SOURCE_HOTWORD:
-            return AudioSource::HOTWORD;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_session_t> aidl2legacy_int32_t_audio_session_t(int32_t aidl) {
-    return convertReinterpret<audio_session_t>(aidl);
-}
-
-ConversionResult<int32_t> legacy2aidl_audio_session_t_int32_t(audio_session_t legacy) {
-    return convertReinterpret<int32_t>(legacy);
-}
-
 // This type is unnamed in the original definition, thus we name it here.
 using audio_port_config_mix_ext_usecase = decltype(audio_port_config_mix_ext::usecase);
 
@@ -1925,6 +326,27 @@
     return legacy2aidl_audio_session_t_int32_t(legacy.session);
 }
 
+ConversionResult<audio_port_config_device_ext>
+aidl2legacy_AudioPortDeviceExt_audio_port_config_device_ext(
+        const AudioPortDeviceExt& aidl, const media::AudioPortDeviceExtSys& aidlDeviceExt) {
+    audio_port_config_device_ext legacy;
+    legacy.hw_module = VALUE_OR_RETURN(
+            aidl2legacy_int32_t_audio_module_handle_t(aidlDeviceExt.hwModule));
+    RETURN_IF_ERROR(aidl2legacy_AudioDevice_audio_device(
+                    aidl.device, &legacy.type, legacy.address));
+    return legacy;
+}
+
+status_t legacy2aidl_audio_port_config_device_ext_AudioPortDeviceExt(
+        const audio_port_config_device_ext& legacy,
+        AudioPortDeviceExt* aidl, media::AudioPortDeviceExtSys* aidlDeviceExt) {
+    aidlDeviceExt->hwModule = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_audio_module_handle_t_int32_t(legacy.hw_module));
+    aidl->device = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_audio_device_AudioDevice(legacy.type, legacy.address));
+    return OK;
+}
+
 // This type is unnamed in the original definition, thus we name it here.
 using audio_port_config_ext = decltype(audio_port_config::ext);
 
@@ -2169,148 +591,6 @@
     return aidl;
 }
 
-ConversionResult<audio_content_type_t>
-aidl2legacy_AudioContentType_audio_content_type_t(AudioContentType aidl) {
-    switch (aidl) {
-        case AudioContentType::UNKNOWN:
-            return AUDIO_CONTENT_TYPE_UNKNOWN;
-        case AudioContentType::SPEECH:
-            return AUDIO_CONTENT_TYPE_SPEECH;
-        case AudioContentType::MUSIC:
-            return AUDIO_CONTENT_TYPE_MUSIC;
-        case AudioContentType::MOVIE:
-            return AUDIO_CONTENT_TYPE_MOVIE;
-        case AudioContentType::SONIFICATION:
-            return AUDIO_CONTENT_TYPE_SONIFICATION;
-        case AudioContentType::ULTRASOUND:
-            return AUDIO_CONTENT_TYPE_ULTRASOUND;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioContentType>
-legacy2aidl_audio_content_type_t_AudioContentType(audio_content_type_t legacy) {
-    switch (legacy) {
-        case AUDIO_CONTENT_TYPE_UNKNOWN:
-            return AudioContentType::UNKNOWN;
-        case AUDIO_CONTENT_TYPE_SPEECH:
-            return AudioContentType::SPEECH;
-        case AUDIO_CONTENT_TYPE_MUSIC:
-            return AudioContentType::MUSIC;
-        case AUDIO_CONTENT_TYPE_MOVIE:
-            return AudioContentType::MOVIE;
-        case AUDIO_CONTENT_TYPE_SONIFICATION:
-            return AudioContentType::SONIFICATION;
-        case AUDIO_CONTENT_TYPE_ULTRASOUND:
-            return AudioContentType::ULTRASOUND;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_usage_t>
-aidl2legacy_AudioUsage_audio_usage_t(AudioUsage aidl) {
-    switch (aidl) {
-        case AudioUsage::INVALID:
-            break;  // return error
-        case AudioUsage::UNKNOWN:
-            return AUDIO_USAGE_UNKNOWN;
-        case AudioUsage::MEDIA:
-            return AUDIO_USAGE_MEDIA;
-        case AudioUsage::VOICE_COMMUNICATION:
-            return AUDIO_USAGE_VOICE_COMMUNICATION;
-        case AudioUsage::VOICE_COMMUNICATION_SIGNALLING:
-            return AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING;
-        case AudioUsage::ALARM:
-            return AUDIO_USAGE_ALARM;
-        case AudioUsage::NOTIFICATION:
-            return AUDIO_USAGE_NOTIFICATION;
-        case AudioUsage::NOTIFICATION_TELEPHONY_RINGTONE:
-            return AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE;
-        case AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_REQUEST:
-            return AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST;
-        case AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_INSTANT:
-            return AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT;
-        case AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_DELAYED:
-            return AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED;
-        case AudioUsage::NOTIFICATION_EVENT:
-            return AUDIO_USAGE_NOTIFICATION_EVENT;
-        case AudioUsage::ASSISTANCE_ACCESSIBILITY:
-            return AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY;
-        case AudioUsage::ASSISTANCE_NAVIGATION_GUIDANCE:
-            return AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE;
-        case AudioUsage::ASSISTANCE_SONIFICATION:
-            return AUDIO_USAGE_ASSISTANCE_SONIFICATION;
-        case AudioUsage::GAME:
-            return AUDIO_USAGE_GAME;
-        case AudioUsage::VIRTUAL_SOURCE:
-            return AUDIO_USAGE_VIRTUAL_SOURCE;
-        case AudioUsage::ASSISTANT:
-            return AUDIO_USAGE_ASSISTANT;
-        case AudioUsage::CALL_ASSISTANT:
-            return AUDIO_USAGE_CALL_ASSISTANT;
-        case AudioUsage::EMERGENCY:
-            return AUDIO_USAGE_EMERGENCY;
-        case AudioUsage::SAFETY:
-            return AUDIO_USAGE_SAFETY;
-        case AudioUsage::VEHICLE_STATUS:
-            return AUDIO_USAGE_VEHICLE_STATUS;
-        case AudioUsage::ANNOUNCEMENT:
-            return AUDIO_USAGE_ANNOUNCEMENT;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioUsage>
-legacy2aidl_audio_usage_t_AudioUsage(audio_usage_t legacy) {
-    switch (legacy) {
-        case AUDIO_USAGE_UNKNOWN:
-            return AudioUsage::UNKNOWN;
-        case AUDIO_USAGE_MEDIA:
-            return AudioUsage::MEDIA;
-        case AUDIO_USAGE_VOICE_COMMUNICATION:
-            return AudioUsage::VOICE_COMMUNICATION;
-        case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
-            return AudioUsage::VOICE_COMMUNICATION_SIGNALLING;
-        case AUDIO_USAGE_ALARM:
-            return AudioUsage::ALARM;
-        case AUDIO_USAGE_NOTIFICATION:
-            return AudioUsage::NOTIFICATION;
-        case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
-            return AudioUsage::NOTIFICATION_TELEPHONY_RINGTONE;
-        case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
-            return AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_REQUEST;
-        case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
-            return AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_INSTANT;
-        case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
-            return AudioUsage::SYS_RESERVED_NOTIFICATION_COMMUNICATION_DELAYED;
-        case AUDIO_USAGE_NOTIFICATION_EVENT:
-            return AudioUsage::NOTIFICATION_EVENT;
-        case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
-            return AudioUsage::ASSISTANCE_ACCESSIBILITY;
-        case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
-            return AudioUsage::ASSISTANCE_NAVIGATION_GUIDANCE;
-        case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
-            return AudioUsage::ASSISTANCE_SONIFICATION;
-        case AUDIO_USAGE_GAME:
-            return AudioUsage::GAME;
-        case AUDIO_USAGE_VIRTUAL_SOURCE:
-            return AudioUsage::VIRTUAL_SOURCE;
-        case AUDIO_USAGE_ASSISTANT:
-            return AudioUsage::ASSISTANT;
-        case AUDIO_USAGE_CALL_ASSISTANT:
-            return AudioUsage::CALL_ASSISTANT;
-        case AUDIO_USAGE_EMERGENCY:
-            return AudioUsage::EMERGENCY;
-        case AUDIO_USAGE_SAFETY:
-            return AudioUsage::SAFETY;
-        case AUDIO_USAGE_VEHICLE_STATUS:
-            return AudioUsage::VEHICLE_STATUS;
-        case AUDIO_USAGE_ANNOUNCEMENT:
-            return AudioUsage::ANNOUNCEMENT;
-    }
-    return unexpected(BAD_VALUE);
-}
-
 ConversionResult<audio_flags_mask_t>
 aidl2legacy_AudioFlag_audio_flags_mask_t(media::AudioFlag aidl) {
     switch (aidl) {
@@ -2434,140 +714,6 @@
     return aidl;
 }
 
-ConversionResult<audio_encapsulation_mode_t>
-aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(AudioEncapsulationMode aidl) {
-    switch (aidl) {
-        case AudioEncapsulationMode::INVALID:
-            break;  // return error
-        case AudioEncapsulationMode::NONE:
-            return AUDIO_ENCAPSULATION_MODE_NONE;
-        case AudioEncapsulationMode::ELEMENTARY_STREAM:
-            return AUDIO_ENCAPSULATION_MODE_ELEMENTARY_STREAM;
-        case AudioEncapsulationMode::HANDLE:
-            return AUDIO_ENCAPSULATION_MODE_HANDLE;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioEncapsulationMode>
-legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(audio_encapsulation_mode_t legacy) {
-    switch (legacy) {
-        case AUDIO_ENCAPSULATION_MODE_NONE:
-            return AudioEncapsulationMode::NONE;
-        case AUDIO_ENCAPSULATION_MODE_ELEMENTARY_STREAM:
-            return AudioEncapsulationMode::ELEMENTARY_STREAM;
-        case AUDIO_ENCAPSULATION_MODE_HANDLE:
-            return AudioEncapsulationMode::HANDLE;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_offload_info_t>
-aidl2legacy_AudioOffloadInfo_audio_offload_info_t(const AudioOffloadInfo& aidl) {
-    audio_offload_info_t legacy = AUDIO_INFO_INITIALIZER;
-    audio_config_base_t base = VALUE_OR_RETURN(
-            aidl2legacy_AudioConfigBase_audio_config_base_t(aidl.base, false /*isInput*/));
-    legacy.sample_rate = base.sample_rate;
-    legacy.channel_mask = base.channel_mask;
-    legacy.format = base.format;
-    legacy.stream_type = VALUE_OR_RETURN(
-            aidl2legacy_AudioStreamType_audio_stream_type_t(aidl.streamType));
-    legacy.bit_rate = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.bitRatePerSecond));
-    legacy.duration_us = VALUE_OR_RETURN(convertIntegral<int64_t>(aidl.durationUs));
-    legacy.has_video = aidl.hasVideo;
-    legacy.is_streaming = aidl.isStreaming;
-    legacy.bit_width = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.bitWidth));
-    legacy.offload_buffer_size = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.offloadBufferSize));
-    legacy.usage = VALUE_OR_RETURN(aidl2legacy_AudioUsage_audio_usage_t(aidl.usage));
-    legacy.encapsulation_mode = VALUE_OR_RETURN(
-            aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(aidl.encapsulationMode));
-    legacy.content_id = VALUE_OR_RETURN(convertReinterpret<int32_t>(aidl.contentId));
-    legacy.sync_id = VALUE_OR_RETURN(convertReinterpret<int32_t>(aidl.syncId));
-    return legacy;
-}
-
-ConversionResult<AudioOffloadInfo>
-legacy2aidl_audio_offload_info_t_AudioOffloadInfo(const audio_offload_info_t& legacy) {
-    AudioOffloadInfo aidl;
-    // Version 0.1 fields.
-    if (legacy.size < offsetof(audio_offload_info_t, usage) + sizeof(audio_offload_info_t::usage)) {
-        return unexpected(BAD_VALUE);
-    }
-    const audio_config_base_t base = { .sample_rate = legacy.sample_rate,
-        .channel_mask = legacy.channel_mask, .format = legacy.format };
-    aidl.base = VALUE_OR_RETURN(legacy2aidl_audio_config_base_t_AudioConfigBase(
-                    base, false /*isInput*/));
-    aidl.streamType = VALUE_OR_RETURN(
-            legacy2aidl_audio_stream_type_t_AudioStreamType(legacy.stream_type));
-    aidl.bitRatePerSecond = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.bit_rate));
-    aidl.durationUs = VALUE_OR_RETURN(convertIntegral<int64_t>(legacy.duration_us));
-    aidl.hasVideo = legacy.has_video;
-    aidl.isStreaming = legacy.is_streaming;
-    aidl.bitWidth = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.bit_width));
-    aidl.offloadBufferSize = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.offload_buffer_size));
-    aidl.usage = VALUE_OR_RETURN(legacy2aidl_audio_usage_t_AudioUsage(legacy.usage));
-
-    // Version 0.2 fields.
-    if (legacy.version >= AUDIO_OFFLOAD_INFO_VERSION_0_2) {
-        if (legacy.size <
-            offsetof(audio_offload_info_t, sync_id) + sizeof(audio_offload_info_t::sync_id)) {
-            return unexpected(BAD_VALUE);
-        }
-        aidl.encapsulationMode = VALUE_OR_RETURN(
-                legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(
-                        legacy.encapsulation_mode));
-        aidl.contentId = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.content_id));
-        aidl.syncId = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.sync_id));
-    }
-    return aidl;
-}
-
-ConversionResult<audio_config_t>
-aidl2legacy_AudioConfig_audio_config_t(const AudioConfig& aidl, bool isInput) {
-    const audio_config_base_t legacyBase = VALUE_OR_RETURN(
-            aidl2legacy_AudioConfigBase_audio_config_base_t(aidl.base, isInput));
-    audio_config_t legacy = AUDIO_CONFIG_INITIALIZER;
-    legacy.sample_rate = legacyBase.sample_rate;
-    legacy.channel_mask = legacyBase.channel_mask;
-    legacy.format = legacyBase.format;
-    legacy.offload_info = VALUE_OR_RETURN(
-            aidl2legacy_AudioOffloadInfo_audio_offload_info_t(aidl.offloadInfo));
-    legacy.frame_count = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.frameCount));
-    return legacy;
-}
-
-ConversionResult<AudioConfig>
-legacy2aidl_audio_config_t_AudioConfig(const audio_config_t& legacy, bool isInput) {
-    const audio_config_base_t base = { .sample_rate = legacy.sample_rate,
-        .channel_mask = legacy.channel_mask, .format = legacy.format };
-    AudioConfig aidl;
-    aidl.base = VALUE_OR_RETURN(legacy2aidl_audio_config_base_t_AudioConfigBase(base, isInput));
-    aidl.offloadInfo = VALUE_OR_RETURN(
-            legacy2aidl_audio_offload_info_t_AudioOffloadInfo(legacy.offload_info));
-    aidl.frameCount = VALUE_OR_RETURN(convertIntegral<int64_t>(legacy.frame_count));
-    return aidl;
-}
-
-ConversionResult<audio_config_base_t>
-aidl2legacy_AudioConfigBase_audio_config_base_t(const AudioConfigBase& aidl, bool isInput) {
-    audio_config_base_t legacy;
-    legacy.sample_rate = VALUE_OR_RETURN(convertIntegral<uint32_t>(aidl.sampleRate));
-    legacy.channel_mask = VALUE_OR_RETURN(
-            aidl2legacy_AudioChannelLayout_audio_channel_mask_t(aidl.channelMask, isInput));
-    legacy.format = VALUE_OR_RETURN(aidl2legacy_AudioFormatDescription_audio_format_t(aidl.format));
-    return legacy;
-}
-
-ConversionResult<AudioConfigBase>
-legacy2aidl_audio_config_base_t_AudioConfigBase(const audio_config_base_t& legacy, bool isInput) {
-    AudioConfigBase aidl;
-    aidl.sampleRate = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.sample_rate));
-    aidl.channelMask = VALUE_OR_RETURN(
-            legacy2aidl_audio_channel_mask_t_AudioChannelLayout(legacy.channel_mask, isInput));
-    aidl.format = VALUE_OR_RETURN(legacy2aidl_audio_format_t_AudioFormatDescription(legacy.format));
-    return aidl;
-}
-
 ConversionResult<sp<IMemory>>
 aidl2legacy_SharedFileRegion_IMemory(const media::SharedFileRegion& aidl) {
     sp<IMemory> legacy;
@@ -2586,8 +732,8 @@
     return aidl;
 }
 
-ConversionResult<sp<IMemory>>
-aidl2legacy_NullableSharedFileRegion_IMemory(const std::optional<media::SharedFileRegion>& aidl) {
+ConversionResult<sp<IMemory>> aidl2legacy_NullableSharedFileRegion_IMemory(
+        const std::optional<media::SharedFileRegion>& aidl) {
     sp<IMemory> legacy;
     if (!convertNullableSharedFileRegionToIMemory(aidl, &legacy)) {
         return unexpected(BAD_VALUE);
@@ -2622,31 +768,6 @@
     return aidl;
 }
 
-ConversionResult<audio_uuid_t>
-aidl2legacy_AudioUuid_audio_uuid_t(const AudioUuid& aidl) {
-    audio_uuid_t legacy;
-    legacy.timeLow = VALUE_OR_RETURN(convertReinterpret<uint32_t>(aidl.timeLow));
-    legacy.timeMid = VALUE_OR_RETURN(convertIntegral<uint16_t>(aidl.timeMid));
-    legacy.timeHiAndVersion = VALUE_OR_RETURN(convertIntegral<uint16_t>(aidl.timeHiAndVersion));
-    legacy.clockSeq = VALUE_OR_RETURN(convertIntegral<uint16_t>(aidl.clockSeq));
-    if (aidl.node.size() != std::size(legacy.node)) {
-        return unexpected(BAD_VALUE);
-    }
-    std::copy(aidl.node.begin(), aidl.node.end(), legacy.node);
-    return legacy;
-}
-
-ConversionResult<AudioUuid>
-legacy2aidl_audio_uuid_t_AudioUuid(const audio_uuid_t& legacy) {
-    AudioUuid aidl;
-    aidl.timeLow = VALUE_OR_RETURN(convertReinterpret<int32_t>(legacy.timeLow));
-    aidl.timeMid = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.timeMid));
-    aidl.timeHiAndVersion = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.timeHiAndVersion));
-    aidl.clockSeq = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.clockSeq));
-    std::copy(legacy.node, legacy.node + std::size(legacy.node), std::back_inserter(aidl.node));
-    return aidl;
-}
-
 ConversionResult<effect_descriptor_t>
 aidl2legacy_EffectDescriptor_effect_descriptor_t(const media::EffectDescriptor& aidl) {
     effect_descriptor_t legacy;
@@ -2677,76 +798,34 @@
     return aidl;
 }
 
-ConversionResult<audio_encapsulation_metadata_type_t>
-aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t(
-        AudioEncapsulationMetadataType aidl) {
-    switch (aidl) {
-        case AudioEncapsulationMetadataType::NONE:
-            return AUDIO_ENCAPSULATION_METADATA_TYPE_NONE;
-        case AudioEncapsulationMetadataType::FRAMEWORK_TUNER:
-            return AUDIO_ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER;
-        case AudioEncapsulationMetadataType::DVB_AD_DESCRIPTOR:
-            return AUDIO_ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR;
-    }
-    return unexpected(BAD_VALUE);
+ConversionResult<audio_port_mix_ext>
+aidl2legacy_AudioPortMixExt_audio_port_mix_ext(
+        const AudioPortMixExt& aidl, const media::AudioPortMixExtSys& aidlSys) {
+    audio_port_mix_ext legacy{};
+    legacy.hw_module = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_module_handle_t(aidlSys.hwModule));
+    legacy.handle = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_io_handle_t(aidl.handle));
+    return legacy;
 }
 
-ConversionResult<AudioEncapsulationMetadataType>
-legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType(
-        audio_encapsulation_metadata_type_t legacy) {
-    switch (legacy) {
-        case AUDIO_ENCAPSULATION_METADATA_TYPE_NONE:
-            return AudioEncapsulationMetadataType::NONE;
-        case AUDIO_ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER:
-            return AudioEncapsulationMetadataType::FRAMEWORK_TUNER;
-        case AUDIO_ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR:
-            return AudioEncapsulationMetadataType::DVB_AD_DESCRIPTOR;
-    }
-    return unexpected(BAD_VALUE);
+status_t
+legacy2aidl_audio_port_mix_ext_AudioPortMixExt(const audio_port_mix_ext& legacy,
+        AudioPortMixExt* aidl, media::AudioPortMixExtSys* aidlMixExt) {
+    aidlMixExt->hwModule = VALUE_OR_RETURN_STATUS(
+            legacy2aidl_audio_module_handle_t_int32_t(legacy.hw_module));
+    aidl->handle = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_io_handle_t_int32_t(legacy.handle));
+    return OK;
 }
 
-ConversionResult<uint32_t>
-aidl2legacy_AudioEncapsulationMode_mask(int32_t aidl) {
-    return convertBitmask<uint32_t,
-            int32_t,
-            audio_encapsulation_mode_t,
-            AudioEncapsulationMode>(
-            aidl, aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t,
-            indexToEnum_index<AudioEncapsulationMode>,
-            enumToMask_index<uint32_t, audio_encapsulation_mode_t>);
+ConversionResult<audio_port_session_ext>
+aidl2legacy_int32_t_audio_port_session_ext(int32_t aidl) {
+    audio_port_session_ext legacy;
+    legacy.session = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_session_t(aidl));
+    return legacy;
 }
 
 ConversionResult<int32_t>
-legacy2aidl_AudioEncapsulationMode_mask(uint32_t legacy) {
-    return convertBitmask<int32_t,
-            uint32_t,
-            AudioEncapsulationMode,
-            audio_encapsulation_mode_t>(
-            legacy, legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode,
-            indexToEnum_index<audio_encapsulation_mode_t>,
-            enumToMask_index<int32_t, AudioEncapsulationMode>);
-}
-
-ConversionResult<uint32_t>
-aidl2legacy_AudioEncapsulationMetadataType_mask(int32_t aidl) {
-    return convertBitmask<uint32_t,
-            int32_t,
-            audio_encapsulation_metadata_type_t,
-            AudioEncapsulationMetadataType>(
-            aidl, aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t,
-            indexToEnum_index<AudioEncapsulationMetadataType>,
-            enumToMask_index<uint32_t, audio_encapsulation_metadata_type_t>);
-}
-
-ConversionResult<int32_t>
-legacy2aidl_AudioEncapsulationMetadataType_mask(uint32_t legacy) {
-    return convertBitmask<int32_t,
-            uint32_t,
-            AudioEncapsulationMetadataType,
-            audio_encapsulation_metadata_type_t>(
-            legacy, legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType,
-            indexToEnum_index<audio_encapsulation_metadata_type_t>,
-            enumToMask_index<int32_t, AudioEncapsulationMetadataType>);
+legacy2aidl_audio_port_session_ext_int32_t(const audio_port_session_ext& legacy) {
+    return legacy2aidl_audio_session_t_int32_t(legacy.session);
 }
 
 ConversionResult<audio_port_device_ext>
@@ -2779,36 +858,6 @@
     return OK;
 }
 
-ConversionResult<audio_port_mix_ext>
-aidl2legacy_AudioPortMixExt_audio_port_mix_ext(
-        const AudioPortMixExt& aidl, const media::AudioPortMixExtSys& aidlSys) {
-    audio_port_mix_ext legacy{};
-    legacy.hw_module = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_module_handle_t(aidlSys.hwModule));
-    legacy.handle = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_io_handle_t(aidl.handle));
-    return legacy;
-}
-
-status_t
-legacy2aidl_audio_port_mix_ext_AudioPortMixExt(const audio_port_mix_ext& legacy,
-        AudioPortMixExt* aidl, media::AudioPortMixExtSys* aidlMixExt) {
-    aidlMixExt->hwModule = VALUE_OR_RETURN_STATUS(
-            legacy2aidl_audio_module_handle_t_int32_t(legacy.hw_module));
-    aidl->handle = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_io_handle_t_int32_t(legacy.handle));
-    return OK;
-}
-
-ConversionResult<audio_port_session_ext>
-aidl2legacy_int32_t_audio_port_session_ext(int32_t aidl) {
-    audio_port_session_ext legacy;
-    legacy.session = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_session_t(aidl));
-    return legacy;
-}
-
-ConversionResult<int32_t>
-legacy2aidl_audio_port_session_ext_int32_t(const audio_port_session_ext& legacy) {
-    return legacy2aidl_audio_session_t_int32_t(legacy.session);
-}
-
 // This type is unnamed in the original definition, thus we name it here.
 using audio_port_v7_ext = decltype(audio_port_v7::ext);
 
@@ -2880,93 +929,6 @@
     LOG_ALWAYS_FATAL("Shouldn't get here"); // with -Werror,-Wswitch may compile-time fail
 }
 
-ConversionResult<audio_profile>
-aidl2legacy_AudioProfile_audio_profile(const AudioProfile& aidl, bool isInput) {
-    audio_profile legacy;
-    legacy.format = VALUE_OR_RETURN(aidl2legacy_AudioFormatDescription_audio_format_t(aidl.format));
-
-    if (aidl.sampleRates.size() > std::size(legacy.sample_rates)) {
-        return unexpected(BAD_VALUE);
-    }
-    RETURN_IF_ERROR(
-            convertRange(aidl.sampleRates.begin(), aidl.sampleRates.end(), legacy.sample_rates,
-                         convertIntegral<int32_t, unsigned int>));
-    legacy.num_sample_rates = aidl.sampleRates.size();
-
-    if (aidl.channelMasks.size() > std::size(legacy.channel_masks)) {
-        return unexpected(BAD_VALUE);
-    }
-    RETURN_IF_ERROR(
-            convertRange(aidl.channelMasks.begin(), aidl.channelMasks.end(), legacy.channel_masks,
-                    [isInput](const AudioChannelLayout& l) {
-                        return aidl2legacy_AudioChannelLayout_audio_channel_mask_t(l, isInput);
-                    }));
-    legacy.num_channel_masks = aidl.channelMasks.size();
-
-    legacy.encapsulation_type = VALUE_OR_RETURN(
-            aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(aidl.encapsulationType));
-    return legacy;
-}
-
-ConversionResult<AudioProfile>
-legacy2aidl_audio_profile_AudioProfile(const audio_profile& legacy, bool isInput) {
-    AudioProfile aidl;
-    aidl.format = VALUE_OR_RETURN(legacy2aidl_audio_format_t_AudioFormatDescription(legacy.format));
-
-    if (legacy.num_sample_rates > std::size(legacy.sample_rates)) {
-        return unexpected(BAD_VALUE);
-    }
-    RETURN_IF_ERROR(
-            convertRange(legacy.sample_rates, legacy.sample_rates + legacy.num_sample_rates,
-                         std::back_inserter(aidl.sampleRates),
-                         convertIntegral<unsigned int, int32_t>));
-
-    if (legacy.num_channel_masks > std::size(legacy.channel_masks)) {
-        return unexpected(BAD_VALUE);
-    }
-    RETURN_IF_ERROR(
-            convertRange(legacy.channel_masks, legacy.channel_masks + legacy.num_channel_masks,
-                         std::back_inserter(aidl.channelMasks),
-                    [isInput](audio_channel_mask_t m) {
-                        return legacy2aidl_audio_channel_mask_t_AudioChannelLayout(m, isInput);
-                    }));
-
-    aidl.encapsulationType = VALUE_OR_RETURN(
-            legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
-                    legacy.encapsulation_type));
-    return aidl;
-}
-
-ConversionResult<audio_gain>
-aidl2legacy_AudioGain_audio_gain(const AudioGain& aidl, bool isInput) {
-    audio_gain legacy;
-    legacy.mode = VALUE_OR_RETURN(aidl2legacy_int32_t_audio_gain_mode_t_mask(aidl.mode));
-    legacy.channel_mask = VALUE_OR_RETURN(aidl2legacy_AudioChannelLayout_audio_channel_mask_t(
-                    aidl.channelMask, isInput));
-    legacy.min_value = VALUE_OR_RETURN(convertIntegral<int>(aidl.minValue));
-    legacy.max_value = VALUE_OR_RETURN(convertIntegral<int>(aidl.maxValue));
-    legacy.default_value = VALUE_OR_RETURN(convertIntegral<int>(aidl.defaultValue));
-    legacy.step_value = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.stepValue));
-    legacy.min_ramp_ms = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.minRampMs));
-    legacy.max_ramp_ms = VALUE_OR_RETURN(convertIntegral<unsigned int>(aidl.maxRampMs));
-    return legacy;
-}
-
-ConversionResult<AudioGain>
-legacy2aidl_audio_gain_AudioGain(const audio_gain& legacy, bool isInput) {
-    AudioGain aidl;
-    aidl.mode = VALUE_OR_RETURN(legacy2aidl_audio_gain_mode_t_int32_t_mask(legacy.mode));
-    aidl.channelMask = VALUE_OR_RETURN(
-            legacy2aidl_audio_channel_mask_t_AudioChannelLayout(legacy.channel_mask, isInput));
-    aidl.minValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.min_value));
-    aidl.maxValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.max_value));
-    aidl.defaultValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.default_value));
-    aidl.stepValue = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.step_value));
-    aidl.minRampMs = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.min_ramp_ms));
-    aidl.maxRampMs = VALUE_OR_RETURN(convertIntegral<int32_t>(legacy.max_ramp_ms));
-    return aidl;
-}
-
 ConversionResult<audio_port_v7>
 aidl2legacy_AudioPort_audio_port_v7(const media::AudioPort& aidl) {
     audio_port_v7 legacy;
@@ -3061,58 +1023,6 @@
     return aidl;
 }
 
-ConversionResult<audio_mode_t>
-aidl2legacy_AudioMode_audio_mode_t(AudioMode aidl) {
-    switch (aidl) {
-        case AudioMode::SYS_RESERVED_INVALID:
-            return AUDIO_MODE_INVALID;
-        case AudioMode::SYS_RESERVED_CURRENT:
-            return AUDIO_MODE_CURRENT;
-        case AudioMode::NORMAL:
-            return AUDIO_MODE_NORMAL;
-        case AudioMode::RINGTONE:
-            return AUDIO_MODE_RINGTONE;
-        case AudioMode::IN_CALL:
-            return AUDIO_MODE_IN_CALL;
-        case AudioMode::IN_COMMUNICATION:
-            return AUDIO_MODE_IN_COMMUNICATION;
-        case AudioMode::CALL_SCREEN:
-            return AUDIO_MODE_CALL_SCREEN;
-        case AudioMode::SYS_RESERVED_CALL_REDIRECT:
-            return AUDIO_MODE_CALL_REDIRECT;
-        case AudioMode::SYS_RESERVED_COMMUNICATION_REDIRECT:
-            return AUDIO_MODE_COMMUNICATION_REDIRECT;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioMode>
-legacy2aidl_audio_mode_t_AudioMode(audio_mode_t legacy) {
-    switch (legacy) {
-        case AUDIO_MODE_INVALID:
-            return AudioMode::SYS_RESERVED_INVALID;
-        case AUDIO_MODE_CURRENT:
-            return AudioMode::SYS_RESERVED_CURRENT;
-        case AUDIO_MODE_NORMAL:
-            return AudioMode::NORMAL;
-        case AUDIO_MODE_RINGTONE:
-            return AudioMode::RINGTONE;
-        case AUDIO_MODE_IN_CALL:
-            return AudioMode::IN_CALL;
-        case AUDIO_MODE_IN_COMMUNICATION:
-            return AudioMode::IN_COMMUNICATION;
-        case AUDIO_MODE_CALL_SCREEN:
-            return AudioMode::CALL_SCREEN;
-        case AUDIO_MODE_CALL_REDIRECT:
-            return AudioMode::SYS_RESERVED_CALL_REDIRECT;
-        case AUDIO_MODE_COMMUNICATION_REDIRECT:
-            return AudioMode::SYS_RESERVED_COMMUNICATION_REDIRECT;
-        case AUDIO_MODE_CNT:
-            break;
-    }
-    return unexpected(BAD_VALUE);
-}
-
 ConversionResult<audio_unique_id_use_t>
 aidl2legacy_AudioUniqueIdUse_audio_unique_id_use_t(media::AudioUniqueIdUse aidl) {
     switch (aidl) {
@@ -3255,90 +1165,6 @@
     return aidl;
 }
 
-ConversionResult<audio_standard_t>
-aidl2legacy_AudioStandard_audio_standard_t(AudioStandard aidl) {
-    switch (aidl) {
-        case AudioStandard::NONE:
-            return AUDIO_STANDARD_NONE;
-        case AudioStandard::EDID:
-            return AUDIO_STANDARD_EDID;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioStandard>
-legacy2aidl_audio_standard_t_AudioStandard(audio_standard_t legacy) {
-    switch (legacy) {
-        case AUDIO_STANDARD_NONE:
-            return AudioStandard::NONE;
-        case AUDIO_STANDARD_EDID:
-            return AudioStandard::EDID;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<audio_extra_audio_descriptor>
-aidl2legacy_ExtraAudioDescriptor_audio_extra_audio_descriptor(
-        const ExtraAudioDescriptor& aidl) {
-    audio_extra_audio_descriptor legacy;
-    legacy.standard = VALUE_OR_RETURN(aidl2legacy_AudioStandard_audio_standard_t(aidl.standard));
-    if (aidl.audioDescriptor.size() > EXTRA_AUDIO_DESCRIPTOR_SIZE) {
-        return unexpected(BAD_VALUE);
-    }
-    legacy.descriptor_length = aidl.audioDescriptor.size();
-    std::copy(aidl.audioDescriptor.begin(), aidl.audioDescriptor.end(),
-              std::begin(legacy.descriptor));
-    legacy.encapsulation_type =
-            VALUE_OR_RETURN(aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(
-                    aidl.encapsulationType));
-    return legacy;
-}
-
-ConversionResult<ExtraAudioDescriptor>
-legacy2aidl_audio_extra_audio_descriptor_ExtraAudioDescriptor(
-        const audio_extra_audio_descriptor& legacy) {
-    ExtraAudioDescriptor aidl;
-    aidl.standard = VALUE_OR_RETURN(legacy2aidl_audio_standard_t_AudioStandard(legacy.standard));
-    if (legacy.descriptor_length > EXTRA_AUDIO_DESCRIPTOR_SIZE) {
-        return unexpected(BAD_VALUE);
-    }
-    aidl.audioDescriptor.resize(legacy.descriptor_length);
-    std::copy(legacy.descriptor, legacy.descriptor + legacy.descriptor_length,
-              aidl.audioDescriptor.begin());
-    aidl.encapsulationType =
-            VALUE_OR_RETURN(legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
-                    legacy.encapsulation_type));
-    return aidl;
-}
-
-ConversionResult<audio_encapsulation_type_t>
-aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(
-        const AudioEncapsulationType& aidl) {
-    switch (aidl) {
-        case AudioEncapsulationType::NONE:
-            return AUDIO_ENCAPSULATION_TYPE_NONE;
-        case AudioEncapsulationType::IEC61937:
-            return AUDIO_ENCAPSULATION_TYPE_IEC61937;
-        case AudioEncapsulationType::PCM:
-            return AUDIO_ENCAPSULATION_TYPE_PCM;
-    }
-    return unexpected(BAD_VALUE);
-}
-
-ConversionResult<AudioEncapsulationType>
-legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
-        const audio_encapsulation_type_t & legacy) {
-    switch (legacy) {
-        case AUDIO_ENCAPSULATION_TYPE_NONE:
-            return AudioEncapsulationType::NONE;
-        case AUDIO_ENCAPSULATION_TYPE_IEC61937:
-            return AudioEncapsulationType::IEC61937;
-        case AUDIO_ENCAPSULATION_TYPE_PCM:
-            return AudioEncapsulationType::PCM;
-    }
-    return unexpected(BAD_VALUE);
-}
-
 ConversionResult<TrackSecondaryOutputInfoPair>
 aidl2legacy_TrackSecondaryOutputInfo_TrackSecondaryOutputInfoPair(
         const media::TrackSecondaryOutputInfo& aidl) {
diff --git a/media/libaudioclient/Android.bp b/media/libaudioclient/Android.bp
index e0a8571..c0abb70 100644
--- a/media/libaudioclient/Android.bp
+++ b/media/libaudioclient/Android.bp
@@ -193,88 +193,29 @@
     },
 }
 
-// This is intended for clients needing to include AidlConversionUtil.h, without dragging in a lot of extra
-// dependencies.
-cc_library_headers {
-    name: "libaudioclient_aidl_conversion_util",
-    host_supported: true,
-    vendor_available: true,
-    double_loadable: true,
-    min_sdk_version: "29",
-    export_include_dirs: [
-        "include",
-    ],
-    header_libs: [
-        "libbase_headers",
-        "liberror_headers",
-    ],
-    export_header_lib_headers: [
-        "libbase_headers",
-        "liberror_headers",
-    ],
-    apex_available: [
-        "//apex_available:platform",
-        "com.android.btservices",
-        "com.android.media",
-        "com.android.media.swcodec",
-    ],
-    target: {
-        darwin: {
-            enabled: false,
-        },
-    },
-}
-
 cc_library {
     name: "libaudioclient_aidl_conversion",
     srcs: ["AidlConversion.cpp"],
-    export_include_dirs: ["include"],
-    host_supported: true,
-    vendor_available: true,
-    double_loadable: true,
-    min_sdk_version: "29",
-    header_libs: [
-        "libaudioclient_aidl_conversion_util",
-        "libaudio_system_headers",
-    ],
-    export_header_lib_headers: [
-        "libaudioclient_aidl_conversion_util",
-    ],
-    defaults: [
-        "latest_android_media_audio_common_types_cpp_export_shared",
-    ],
     shared_libs: [
         "audioclient-types-aidl-cpp",
-        "libbase",
-        "libbinder",
-        "liblog",
-        "libshmemcompat",
-        "libstagefright_foundation",
-        "libutils",
-        "shared-file-region-aidl-cpp",
-        "framework-permission-aidl-cpp",
+    ],
+    static_libs: [
+        "libaudio_aidl_conversion_common_cpp",
+    ],
+    export_include_dirs: ["include"],
+    header_libs: [
+        "libaudio_aidl_conversion_common_util_cpp",
+    ],
+    export_header_lib_headers: [
+        "libaudio_aidl_conversion_common_util_cpp",
     ],
     export_shared_lib_headers: [
         "audioclient-types-aidl-cpp",
-        "libbase",
-        "shared-file-region-aidl-cpp",
     ],
-    cflags: [
-        "-Wall",
-        "-Werror",
-        "-Wno-error=deprecated-declarations",
+    defaults: [
+        "audio_aidl_conversion_common_default",
+        "latest_android_media_audio_common_types_cpp_export_shared",
     ],
-    sanitize: {
-        misc_undefined: [
-            "unsigned-integer-overflow",
-            "signed-integer-overflow",
-        ],
-    },
-    target: {
-        darwin: {
-            enabled: false,
-        },
-    },
 }
 
 // AIDL interface between libaudioclient and framework.jar
diff --git a/media/libaudioclient/include/media/AidlConversion.h b/media/libaudioclient/include/media/AidlConversion.h
index 1e66164..afcb61a 100644
--- a/media/libaudioclient/include/media/AidlConversion.h
+++ b/media/libaudioclient/include/media/AidlConversion.h
@@ -37,33 +37,10 @@
 #include <android/media/EffectDescriptor.h>
 #include <android/media/LatencyMode.h>
 #include <android/media/TrackSecondaryOutputInfo.h>
-#include <android/media/audio/common/AudioChannelLayout.h>
-#include <android/media/audio/common/AudioConfig.h>
-#include <android/media/audio/common/AudioConfigBase.h>
-#include <android/media/audio/common/AudioContentType.h>
-#include <android/media/audio/common/AudioDeviceDescription.h>
-#include <android/media/audio/common/AudioEncapsulationMetadataType.h>
-#include <android/media/audio/common/AudioEncapsulationMode.h>
-#include <android/media/audio/common/AudioEncapsulationType.h>
-#include <android/media/audio/common/AudioFormatDescription.h>
-#include <android/media/audio/common/AudioGain.h>
-#include <android/media/audio/common/AudioGainConfig.h>
-#include <android/media/audio/common/AudioGainMode.h>
-#include <android/media/audio/common/AudioInputFlags.h>
-#include <android/media/audio/common/AudioMode.h>
-#include <android/media/audio/common/AudioOffloadInfo.h>
-#include <android/media/audio/common/AudioOutputFlags.h>
-#include <android/media/audio/common/AudioPortExt.h>
-#include <android/media/audio/common/AudioPortMixExt.h>
-#include <android/media/audio/common/AudioProfile.h>
-#include <android/media/audio/common/AudioSource.h>
-#include <android/media/audio/common/AudioStandard.h>
-#include <android/media/audio/common/AudioUsage.h>
-#include <android/media/audio/common/AudioUuid.h>
-#include <android/media/audio/common/ExtraAudioDescriptor.h>
 
 #include <android/media/SharedFileRegion.h>
 #include <binder/IMemory.h>
+#include <media/AidlConversionCppNdk.h>
 #include <media/AidlConversionUtil.h>
 #include <media/AudioClient.h>
 #include <media/AudioCommonTypes.h>
@@ -73,49 +50,6 @@
 
 namespace android {
 
-// maxSize is the size of the C-string buffer (including the 0-terminator), NOT the max length of
-// the string.
-status_t aidl2legacy_string(std::string_view aidl, char* dest, size_t maxSize);
-ConversionResult<std::string> legacy2aidl_string(const char* legacy, size_t maxSize);
-
-ConversionResult<audio_module_handle_t> aidl2legacy_int32_t_audio_module_handle_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_module_handle_t_int32_t(audio_module_handle_t legacy);
-
-ConversionResult<audio_io_handle_t> aidl2legacy_int32_t_audio_io_handle_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_io_handle_t_int32_t(audio_io_handle_t legacy);
-
-ConversionResult<audio_port_handle_t> aidl2legacy_int32_t_audio_port_handle_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_port_handle_t_int32_t(audio_port_handle_t legacy);
-
-ConversionResult<audio_patch_handle_t> aidl2legacy_int32_t_audio_patch_handle_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_patch_handle_t_int32_t(audio_patch_handle_t legacy);
-
-ConversionResult<audio_unique_id_t> aidl2legacy_int32_t_audio_unique_id_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_unique_id_t_int32_t(audio_unique_id_t legacy);
-
-ConversionResult<audio_hw_sync_t> aidl2legacy_int32_t_audio_hw_sync_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_hw_sync_t_int32_t(audio_hw_sync_t legacy);
-
-ConversionResult<unsigned int> aidl2legacy_int32_t_config_mask(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_config_mask_int32_t(unsigned int legacy);
-
-ConversionResult<pid_t> aidl2legacy_int32_t_pid_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_pid_t_int32_t(pid_t legacy);
-
-ConversionResult<uid_t> aidl2legacy_int32_t_uid_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_uid_t_int32_t(uid_t legacy);
-
-ConversionResult<String8> aidl2legacy_string_view_String8(std::string_view aidl);
-ConversionResult<std::string> legacy2aidl_String8_string(const String8& legacy);
-
-ConversionResult<String16> aidl2legacy_string_view_String16(std::string_view aidl);
-ConversionResult<std::string> legacy2aidl_String16_string(const String16& legacy);
-
-ConversionResult<std::optional<String16>>
-aidl2legacy_optional_string_view_optional_String16(std::optional<std::string_view> aidl);
-ConversionResult<std::optional<std::string_view>>
-legacy2aidl_optional_String16_optional_string(std::optional<String16> legacy);
-
 ConversionResult<audio_io_config_event_t> aidl2legacy_AudioIoConfigEvent_audio_io_config_event_t(
         media::AudioIoConfigEvent aidl);
 ConversionResult<media::AudioIoConfigEvent> legacy2aidl_audio_io_config_event_t_AudioIoConfigEvent(
@@ -131,75 +65,6 @@
 ConversionResult<media::AudioPortType> legacy2aidl_audio_port_type_t_AudioPortType(
         audio_port_type_t legacy);
 
-ConversionResult<audio_channel_mask_t> aidl2legacy_AudioChannelLayout_audio_channel_mask_t(
-        const media::audio::common::AudioChannelLayout& aidl, bool isInput);
-ConversionResult<media::audio::common::AudioChannelLayout>
-legacy2aidl_audio_channel_mask_t_AudioChannelLayout(audio_channel_mask_t legacy, bool isInput);
-
-ConversionResult<audio_devices_t> aidl2legacy_AudioDeviceDescription_audio_devices_t(
-        const media::audio::common::AudioDeviceDescription& aidl);
-ConversionResult<media::audio::common::AudioDeviceDescription>
-legacy2aidl_audio_devices_t_AudioDeviceDescription(audio_devices_t legacy);
-
-status_t aidl2legacy_AudioDevice_audio_device(
-        const media::audio::common::AudioDevice& aidl,
-        audio_devices_t* legacyType, char* legacyAddress);
-status_t aidl2legacy_AudioDevice_audio_device(
-        const media::audio::common::AudioDevice& aidl,
-        audio_devices_t* legacyType, String8* legacyAddress);
-status_t aidl2legacy_AudioDevice_audio_device(
-        const media::audio::common::AudioDevice& aidl,
-        audio_devices_t* legacyType, std::string* legacyAddress);
-ConversionResult<media::audio::common::AudioDevice>
-legacy2aidl_audio_device_AudioDevice(
-        audio_devices_t legacyType, const char* legacyAddress);
-ConversionResult<media::audio::common::AudioDevice>
-legacy2aidl_audio_device_AudioDevice(
-        audio_devices_t legacyType, const String8& legacyAddress);
-
-ConversionResult<audio_format_t> aidl2legacy_AudioFormatDescription_audio_format_t(
-        const media::audio::common::AudioFormatDescription& aidl);
-ConversionResult<media::audio::common::AudioFormatDescription>
-legacy2aidl_audio_format_t_AudioFormatDescription(audio_format_t legacy);
-
-ConversionResult<audio_gain_mode_t>
-aidl2legacy_AudioGainMode_audio_gain_mode_t(media::audio::common::AudioGainMode aidl);
-ConversionResult<media::audio::common::AudioGainMode>
-legacy2aidl_audio_gain_mode_t_AudioGainMode(audio_gain_mode_t legacy);
-
-ConversionResult<audio_gain_mode_t> aidl2legacy_int32_t_audio_gain_mode_t_mask(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_gain_mode_t_int32_t_mask(audio_gain_mode_t legacy);
-
-ConversionResult<audio_gain_config> aidl2legacy_AudioGainConfig_audio_gain_config(
-        const media::audio::common::AudioGainConfig& aidl, bool isInput);
-ConversionResult<media::audio::common::AudioGainConfig>
-legacy2aidl_audio_gain_config_AudioGainConfig(const audio_gain_config& legacy, bool isInput);
-
-ConversionResult<audio_input_flags_t>
-aidl2legacy_AudioInputFlags_audio_input_flags_t(media::audio::common::AudioInputFlags aidl);
-ConversionResult<media::audio::common::AudioInputFlags>
-legacy2aidl_audio_input_flags_t_AudioInputFlags(audio_input_flags_t legacy);
-
-ConversionResult<audio_output_flags_t>
-aidl2legacy_AudioOutputFlags_audio_output_flags_t(media::audio::common::AudioOutputFlags aidl);
-ConversionResult<media::audio::common::AudioOutputFlags>
-legacy2aidl_audio_output_flags_t_AudioOutputFlags(audio_output_flags_t legacy);
-
-ConversionResult<audio_input_flags_t> aidl2legacy_int32_t_audio_input_flags_t_mask(
-        int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_input_flags_t_int32_t_mask(
-        audio_input_flags_t legacy);
-
-ConversionResult<audio_output_flags_t> aidl2legacy_int32_t_audio_output_flags_t_mask(
-        int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_output_flags_t_int32_t_mask(
-        audio_output_flags_t legacy);
-
-ConversionResult<audio_io_flags> aidl2legacy_AudioIoFlags_audio_io_flags(
-        const media::audio::common::AudioIoFlags& aidl, bool isInput);
-ConversionResult<media::audio::common::AudioIoFlags> legacy2aidl_audio_io_flags_AudioIoFlags(
-        const audio_io_flags& legacy, bool isInput);
-
 ConversionResult<audio_port_config_device_ext>
 aidl2legacy_AudioPortDeviceExt_audio_port_config_device_ext(
         const media::audio::common::AudioPortDeviceExt& aidl,
@@ -214,15 +79,6 @@
 ConversionResult<media::audio::common::AudioStreamType>
 legacy2aidl_audio_stream_type_t_AudioStreamType(audio_stream_type_t legacy);
 
-ConversionResult<audio_source_t> aidl2legacy_AudioSource_audio_source_t(
-        media::audio::common::AudioSource aidl);
-ConversionResult<media::audio::common::AudioSource>
-        legacy2aidl_audio_source_t_AudioSource(
-        audio_source_t legacy);
-
-ConversionResult<audio_session_t> aidl2legacy_int32_t_audio_session_t(int32_t aidl);
-ConversionResult<int32_t> legacy2aidl_audio_session_t_int32_t(audio_session_t legacy);
-
 ConversionResult<audio_port_config_mix_ext> aidl2legacy_AudioPortMixExt(
         const media::audio::common::AudioPortMixExt& aidl, media::AudioPortRole role,
         const media::AudioPortMixExtSys& aidlMixExt);
@@ -255,17 +111,6 @@
 ConversionResult<media::AudioClient> legacy2aidl_AudioClient_AudioClient(
         const AudioClient& legacy);
 
-ConversionResult<audio_content_type_t>
-aidl2legacy_AudioContentType_audio_content_type_t(
-        media::audio::common::AudioContentType aidl);
-ConversionResult<media::audio::common::AudioContentType>
-legacy2aidl_audio_content_type_t_AudioContentType(audio_content_type_t legacy);
-
-ConversionResult<audio_usage_t>
-aidl2legacy_AudioUsage_audio_usage_t(media::audio::common::AudioUsage aidl);
-ConversionResult<media::audio::common::AudioUsage>
-legacy2aidl_audio_usage_t_AudioUsage(audio_usage_t legacy);
-
 ConversionResult<audio_flags_mask_t>
 aidl2legacy_AudioFlag_audio_flags_mask_t(media::AudioFlag aidl);
 ConversionResult<media::AudioFlag>
@@ -281,36 +126,13 @@
 ConversionResult<media::AudioAttributesInternal>
 legacy2aidl_audio_attributes_t_AudioAttributesInternal(const audio_attributes_t& legacy);
 
-ConversionResult<audio_encapsulation_mode_t>
-aidl2legacy_AudioEncapsulationMode_audio_encapsulation_mode_t(
-        media::audio::common::AudioEncapsulationMode aidl);
-ConversionResult<media::audio::common::AudioEncapsulationMode>
-legacy2aidl_audio_encapsulation_mode_t_AudioEncapsulationMode(audio_encapsulation_mode_t legacy);
-
-ConversionResult<audio_offload_info_t>
-aidl2legacy_AudioOffloadInfo_audio_offload_info_t(
-        const media::audio::common::AudioOffloadInfo& aidl);
-ConversionResult<media::audio::common::AudioOffloadInfo>
-legacy2aidl_audio_offload_info_t_AudioOffloadInfo(const audio_offload_info_t& legacy);
-
-ConversionResult<audio_config_t>
-aidl2legacy_AudioConfig_audio_config_t(const media::audio::common::AudioConfig& aidl, bool isInput);
-ConversionResult<media::audio::common::AudioConfig>
-legacy2aidl_audio_config_t_AudioConfig(const audio_config_t& legacy, bool isInput);
-
-ConversionResult<audio_config_base_t>
-aidl2legacy_AudioConfigBase_audio_config_base_t(
-        const media::audio::common::AudioConfigBase& aidl, bool isInput);
-ConversionResult<media::audio::common::AudioConfigBase>
-legacy2aidl_audio_config_base_t_AudioConfigBase(const audio_config_base_t& legacy, bool isInput);
-
 ConversionResult<sp<IMemory>>
 aidl2legacy_SharedFileRegion_IMemory(const media::SharedFileRegion& aidl);
 ConversionResult<media::SharedFileRegion>
 legacy2aidl_IMemory_SharedFileRegion(const sp<IMemory>& legacy);
 
-ConversionResult<sp<IMemory>>
-aidl2legacy_NullableSharedFileRegion_IMemory(const std::optional<media::SharedFileRegion>& aidl);
+ConversionResult<sp<::android::IMemory>> aidl2legacy_NullableSharedFileRegion_IMemory(
+        const std::optional<media::SharedFileRegion>& aidl);
 ConversionResult<std::optional<media::SharedFileRegion>>
 legacy2aidl_NullableIMemory_SharedFileRegion(const sp<IMemory>& legacy);
 
@@ -319,32 +141,10 @@
 ConversionResult<media::AudioTimestampInternal>
 legacy2aidl_AudioTimestamp_AudioTimestampInternal(const AudioTimestamp& legacy);
 
-ConversionResult<audio_uuid_t>
-aidl2legacy_AudioUuid_audio_uuid_t(const media::audio::common::AudioUuid& aidl);
-ConversionResult<media::audio::common::AudioUuid>
-legacy2aidl_audio_uuid_t_AudioUuid(const audio_uuid_t& legacy);
-
 ConversionResult<effect_descriptor_t>
 aidl2legacy_EffectDescriptor_effect_descriptor_t(const media::EffectDescriptor& aidl);
-ConversionResult<media::EffectDescriptor>
-legacy2aidl_effect_descriptor_t_EffectDescriptor(const effect_descriptor_t& legacy);
-
-ConversionResult<audio_encapsulation_metadata_type_t>
-aidl2legacy_AudioEncapsulationMetadataType_audio_encapsulation_metadata_type_t(
-        media::audio::common::AudioEncapsulationMetadataType aidl);
-ConversionResult<media::audio::common::AudioEncapsulationMetadataType>
-legacy2aidl_audio_encapsulation_metadata_type_t_AudioEncapsulationMetadataType(
-        audio_encapsulation_metadata_type_t legacy);
-
-ConversionResult<uint32_t>
-aidl2legacy_AudioEncapsulationMode_mask(int32_t aidl);
-ConversionResult<int32_t>
-legacy2aidl_AudioEncapsulationMode_mask(uint32_t legacy);
-
-ConversionResult<uint32_t>
-aidl2legacy_AudioEncapsulationMetadataType_mask(int32_t aidl);
-ConversionResult<int32_t>
-legacy2aidl_AudioEncapsulationMetadataType_mask(uint32_t legacy);
+ConversionResult<media::EffectDescriptor> legacy2aidl_effect_descriptor_t_EffectDescriptor(
+        const effect_descriptor_t& legacy);
 
 ConversionResult<audio_port_device_ext>
 aidl2legacy_AudioPortDeviceExt_audio_port_device_ext(
@@ -369,27 +169,11 @@
 ConversionResult<int32_t>
 legacy2aidl_audio_port_session_ext_int32_t(const audio_port_session_ext& legacy);
 
-ConversionResult<audio_profile>
-aidl2legacy_AudioProfile_audio_profile(
-        const media::audio::common::AudioProfile& aidl, bool isInput);
-ConversionResult<media::audio::common::AudioProfile>
-legacy2aidl_audio_profile_AudioProfile(const audio_profile& legacy, bool isInput);
-
-ConversionResult<audio_gain>
-aidl2legacy_AudioGain_audio_gain(const media::audio::common::AudioGain& aidl, bool isInput);
-ConversionResult<media::audio::common::AudioGain>
-legacy2aidl_audio_gain_AudioGain(const audio_gain& legacy, bool isInput);
-
 ConversionResult<audio_port_v7>
 aidl2legacy_AudioPort_audio_port_v7(const media::AudioPort& aidl);
 ConversionResult<media::AudioPort>
 legacy2aidl_audio_port_v7_AudioPort(const audio_port_v7& legacy);
 
-ConversionResult<audio_mode_t>
-aidl2legacy_AudioMode_audio_mode_t(media::audio::common::AudioMode aidl);
-ConversionResult<media::audio::common::AudioMode>
-legacy2aidl_audio_mode_t_AudioMode(audio_mode_t legacy);
-
 ConversionResult<audio_unique_id_use_t>
 aidl2legacy_AudioUniqueIdUse_audio_unique_id_use_t(media::AudioUniqueIdUse aidl);
 ConversionResult<media::AudioUniqueIdUse>
@@ -420,25 +204,6 @@
 ConversionResult<media::AudioPlaybackRate>
 legacy2aidl_audio_playback_rate_t_AudioPlaybackRate(const audio_playback_rate_t& legacy);
 
-ConversionResult<audio_standard_t>
-aidl2legacy_AudioStandard_audio_standard_t(media::audio::common::AudioStandard aidl);
-ConversionResult<media::audio::common::AudioStandard>
-legacy2aidl_audio_standard_t_AudioStandard(audio_standard_t legacy);
-
-ConversionResult<audio_extra_audio_descriptor>
-aidl2legacy_ExtraAudioDescriptor_audio_extra_audio_descriptor(
-        const media::audio::common::ExtraAudioDescriptor& aidl);
-ConversionResult<media::audio::common::ExtraAudioDescriptor>
-legacy2aidl_audio_extra_audio_descriptor_ExtraAudioDescriptor(
-        const audio_extra_audio_descriptor& legacy);
-
-ConversionResult<audio_encapsulation_type_t>
-aidl2legacy_AudioEncapsulationType_audio_encapsulation_type_t(
-        const media::audio::common::AudioEncapsulationType& aidl);
-ConversionResult<media::audio::common::AudioEncapsulationType>
-legacy2aidl_audio_encapsulation_type_t_AudioEncapsulationType(
-        const audio_encapsulation_type_t & legacy);
-
 using TrackSecondaryOutputInfoPair = std::pair<audio_port_handle_t, std::vector<audio_io_handle_t>>;
 ConversionResult<TrackSecondaryOutputInfoPair>
 aidl2legacy_TrackSecondaryOutputInfo_TrackSecondaryOutputInfoPair(
diff --git a/media/libaudioclient/tests/Android.bp b/media/libaudioclient/tests/Android.bp
index df1506a..cbcef12 100644
--- a/media/libaudioclient/tests/Android.bp
+++ b/media/libaudioclient/tests/Android.bp
@@ -36,8 +36,9 @@
         "libutils",
     ],
     static_libs: [
-        "audioclient-types-aidl-cpp",
         "libaudioclient_aidl_conversion",
+        "libaudio_aidl_conversion_common_cpp",
+        "audioclient-types-aidl-cpp",
         "libstagefright_foundation",
     ],
 }
@@ -108,6 +109,7 @@
     shared_libs: [
         "capture_state_listener-aidl-cpp",
         "framework-permission-aidl-cpp",
+        "libaudioclient_aidl_conversion",
         "libbase",
         "libbinder",
         "libcgrouprc",
@@ -137,7 +139,6 @@
         "av-types-aidl-cpp",
         "effect-aidl-cpp",
         "libaudioclient",
-        "libaudioclient_aidl_conversion",
         "libaudiofoundation",
         "libaudiomanager",
         "libaudiopolicy",
diff --git a/media/libaudiofoundation/Android.bp b/media/libaudiofoundation/Android.bp
index a456a2a..c758fcd 100644
--- a/media/libaudiofoundation/Android.bp
+++ b/media/libaudiofoundation/Android.bp
@@ -18,12 +18,12 @@
 
     export_include_dirs: ["include"],
     header_libs: [
-        "libaudioclient_aidl_conversion_util",
+        "libaudio_aidl_conversion_common_util_cpp",
         "libaudio_system_headers",
         "libmedia_helper_headers",
     ],
     export_header_lib_headers: [
-        "libaudioclient_aidl_conversion_util",
+        "libaudio_aidl_conversion_common_util_cpp",
         "libaudio_system_headers",
         "libmedia_helper_headers",
     ],
diff --git a/media/libaudiofoundation/include/media/AudioContainers.h b/media/libaudiofoundation/include/media/AudioContainers.h
index b6e6c84..6c01e29 100644
--- a/media/libaudiofoundation/include/media/AudioContainers.h
+++ b/media/libaudiofoundation/include/media/AudioContainers.h
@@ -66,6 +66,9 @@
     for (const auto &channel : channelMasks) {
         if (audio_channel_mask_out_to_in(channel) != AUDIO_CHANNEL_INVALID) {
             inMaskSet.insert(audio_channel_mask_out_to_in(channel));
+        } else if (audio_channel_mask_get_representation(channel)
+                    == AUDIO_CHANNEL_REPRESENTATION_INDEX) {
+            inMaskSet.insert(channel);
         }
     }
     return inMaskSet;
@@ -76,6 +79,9 @@
     for (const auto &channel : channelMasks) {
         if (audio_channel_mask_in_to_out(channel) != AUDIO_CHANNEL_INVALID) {
             outMaskSet.insert(audio_channel_mask_in_to_out(channel));
+        } else if (audio_channel_mask_get_representation(channel)
+                    == AUDIO_CHANNEL_REPRESENTATION_INDEX) {
+            outMaskSet.insert(channel);
         }
     }
     return outMaskSet;
diff --git a/media/libaudiofoundation/tests/Android.bp b/media/libaudiofoundation/tests/Android.bp
index 0e733d3..2f4aee0 100644
--- a/media/libaudiofoundation/tests/Android.bp
+++ b/media/libaudiofoundation/tests/Android.bp
@@ -23,6 +23,7 @@
     static_libs: [
         "audioclient-types-aidl-cpp",
         "libaudioclient_aidl_conversion",
+        "libaudio_aidl_conversion_common_cpp",
         "libaudiofoundation",
         "libstagefright_foundation",
     ],
diff --git a/media/libeffects/downmix/Android.bp b/media/libeffects/downmix/Android.bp
index abe622d..742626c 100644
--- a/media/libeffects/downmix/Android.bp
+++ b/media/libeffects/downmix/Android.bp
@@ -47,3 +47,29 @@
         "libhardware_headers",
     ],
 }
+
+cc_library_shared {
+    name: "libdownmixaidl",
+    srcs: [
+        "aidl/EffectDownmix.cpp",
+        "aidl/DownmixContext.cpp",
+        ":effectCommonFile",
+    ],
+    defaults: [
+        "aidlaudioservice_defaults",
+        "latest_android_hardware_audio_effect_ndk_shared",
+        "latest_android_media_audio_common_types_ndk_shared",
+    ],
+    header_libs: [
+        "libaudioeffects",
+        "libhardware_headers"
+    ],
+    shared_libs: [
+        "libaudioutils",
+        "libcutils",
+        "liblog",
+    ],
+    visibility: [
+        "//hardware/interfaces/audio/aidl/default",
+    ],
+}
diff --git a/media/libeffects/downmix/aidl/DownmixContext.cpp b/media/libeffects/downmix/aidl/DownmixContext.cpp
new file mode 100644
index 0000000..6869689
--- /dev/null
+++ b/media/libeffects/downmix/aidl/DownmixContext.cpp
@@ -0,0 +1,138 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "AHAL_DownmixContext"
+
+#include <android-base/logging.h>
+
+#include "DownmixContext.h"
+
+using aidl::android::hardware::audio::effect::IEffect;
+using ::android::hardware::audio::common::getChannelCount;
+
+namespace aidl::android::hardware::audio::effect {
+
+DownmixContext::DownmixContext(int statusDepth, const Parameter::Common& common)
+    : EffectContext(statusDepth, common) {
+    LOG(DEBUG) << __func__;
+    mState = DOWNMIX_STATE_UNINITIALIZED;
+    init_params(common);
+}
+
+DownmixContext::~DownmixContext() {
+    LOG(DEBUG) << __func__;
+    mState = DOWNMIX_STATE_UNINITIALIZED;
+}
+
+RetCode DownmixContext::enable() {
+    LOG(DEBUG) << __func__;
+    if (mState != DOWNMIX_STATE_INITIALIZED) {
+        return RetCode::ERROR_EFFECT_LIB_ERROR;
+    }
+    mState = DOWNMIX_STATE_ACTIVE;
+    return RetCode::SUCCESS;
+}
+
+RetCode DownmixContext::disable() {
+    LOG(DEBUG) << __func__;
+    if (mState != DOWNMIX_STATE_ACTIVE) {
+        return RetCode::ERROR_EFFECT_LIB_ERROR;
+    }
+    mState = DOWNMIX_STATE_INITIALIZED;
+    return RetCode::SUCCESS;
+}
+
+void DownmixContext::reset() {
+    LOG(DEBUG) << __func__;
+    disable();
+    resetBuffer();
+}
+
+IEffect::Status DownmixContext::lvmProcess(float* in, float* out, int samples) {
+    LOG(DEBUG) << __func__ << " in " << in << " out " << out << " sample " << samples;
+    IEffect::Status status = {EX_ILLEGAL_ARGUMENT, 0, 0};
+
+    if (in == nullptr || out == nullptr || getInputFrameSize() != getOutputFrameSize() ||
+        getInputFrameSize() == 0) {
+        return status;
+    }
+
+    status = {EX_ILLEGAL_STATE, 0, 0};
+    if (mState == DOWNMIX_STATE_UNINITIALIZED) {
+        LOG(ERROR) << __func__ << "Trying to use an uninitialized downmixer";
+        return status;
+    } else if (mState == DOWNMIX_STATE_INITIALIZED) {
+        LOG(ERROR) << __func__ << "Trying to use a non-configured downmixer";
+        return status;
+    }
+
+    LOG(DEBUG) << __func__ << " start processing";
+    bool accumulate = false;
+    int frames = samples * sizeof(float) / getInputFrameSize();
+    if (mType == Downmix::Type::STRIP) {
+        int inputChannelCount = getChannelCount(mChMask);
+        while (frames) {
+            if (accumulate) {
+                out[0] = std::clamp(out[0] + in[0], -1.f, 1.f);
+                out[1] = std::clamp(out[1] + in[1], -1.f, 1.f);
+            } else {
+                out[0] = in[0];
+                out[1] = in[1];
+            }
+            in += inputChannelCount;
+            out += 2;
+            frames--;
+        }
+    } else {
+        int chMask = mChMask.get<AudioChannelLayout::layoutMask>();
+        if (!mChannelMix.process(in, out, frames, accumulate, (audio_channel_mask_t)chMask)) {
+            LOG(ERROR) << "Multichannel configuration " << mChMask.toString()
+                       << " is not supported";
+            return status;
+        }
+    }
+    LOG(DEBUG) << __func__ << " done processing";
+    return {STATUS_OK, samples, samples};
+}
+
+void DownmixContext::init_params(const Parameter::Common& common) {
+    // when configuring the effect, do not allow a blank or unsupported channel mask
+    AudioChannelLayout channelMask = common.input.base.channelMask;
+    if (isChannelMaskValid(channelMask)) {
+        LOG(ERROR) << "Downmix_Configure error: input channel mask " << channelMask.toString()
+                   << " not supported";
+    } else {
+        mType = Downmix::Type::FOLD;
+        mChMask = channelMask;
+        mState = DOWNMIX_STATE_INITIALIZED;
+    }
+}
+
+bool DownmixContext::isChannelMaskValid(AudioChannelLayout channelMask) {
+    if (channelMask.getTag() == AudioChannelLayout::layoutMask) return false;
+    int chMask = channelMask.get<AudioChannelLayout::layoutMask>();
+    // check against unsupported channels (up to FCC_26)
+    constexpr uint32_t MAXIMUM_CHANNEL_MASK = AudioChannelLayout::LAYOUT_22POINT2 |
+                                              AudioChannelLayout::CHANNEL_FRONT_WIDE_LEFT |
+                                              AudioChannelLayout::CHANNEL_FRONT_WIDE_RIGHT;
+    if (chMask & ~MAXIMUM_CHANNEL_MASK) {
+        LOG(ERROR) << "Unsupported channels in " << (chMask & ~MAXIMUM_CHANNEL_MASK);
+        return false;
+    }
+    return true;
+}
+
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/libeffects/downmix/aidl/DownmixContext.h b/media/libeffects/downmix/aidl/DownmixContext.h
new file mode 100644
index 0000000..8a244ac
--- /dev/null
+++ b/media/libeffects/downmix/aidl/DownmixContext.h
@@ -0,0 +1,78 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include "effect-impl/EffectContext.h"
+
+#include <audio_utils/ChannelMix.h>
+
+namespace aidl::android::hardware::audio::effect {
+
+using media::audio::common::AudioChannelLayout;
+using media::audio::common::AudioDeviceDescription;
+
+enum DownmixState {
+    DOWNMIX_STATE_UNINITIALIZED,
+    DOWNMIX_STATE_INITIALIZED,
+    DOWNMIX_STATE_ACTIVE,
+};
+
+class DownmixContext final : public EffectContext {
+  public:
+    DownmixContext(int statusDepth, const Parameter::Common& common);
+    ~DownmixContext();
+    RetCode enable();
+    RetCode disable();
+    void reset();
+
+    RetCode setDmType(Downmix::Type type) {
+        mType = type;
+        return RetCode::SUCCESS;
+    }
+    Downmix::Type getDmType() const { return mType; }
+
+    RetCode setVolumeStereo(const Parameter::VolumeStereo& volumeStereo) override {
+        // FIXME change volume
+        mVolumeStereo = volumeStereo;
+        return RetCode::SUCCESS;
+    }
+    Parameter::VolumeStereo getVolumeStereo() override { return mVolumeStereo; }
+
+    RetCode setOutputDevice(const AudioDeviceDescription& device) override {
+        // FIXME change type if playing on headset vs speaker
+        mOutputDevice = device;
+        return RetCode::SUCCESS;
+    }
+    AudioDeviceDescription getOutputDevice() { return mOutputDevice; }
+
+    IEffect::Status lvmProcess(float* in, float* out, int samples);
+
+  private:
+    DownmixState mState;
+    Downmix::Type mType;
+    AudioChannelLayout mChMask;
+    ::android::audio_utils::channels::ChannelMix mChannelMix;
+
+    // Common Params
+    AudioDeviceDescription mOutputDevice;
+    Parameter::VolumeStereo mVolumeStereo;
+
+    void init_params(const Parameter::Common& common);
+    bool isChannelMaskValid(AudioChannelLayout channelMask);
+};
+
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/libeffects/downmix/aidl/EffectDownmix.cpp b/media/libeffects/downmix/aidl/EffectDownmix.cpp
new file mode 100644
index 0000000..17d0736
--- /dev/null
+++ b/media/libeffects/downmix/aidl/EffectDownmix.cpp
@@ -0,0 +1,214 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "AHAL_DownmixImpl"
+
+#include <android-base/logging.h>
+
+#include "EffectDownmix.h"
+
+using aidl::android::hardware::audio::effect::Descriptor;
+using aidl::android::hardware::audio::effect::DownmixImpl;
+using aidl::android::hardware::audio::effect::IEffect;
+using aidl::android::hardware::audio::effect::kDownmixImplUUID;
+using aidl::android::hardware::audio::effect::kDownmixTypeUUID;
+using aidl::android::media::audio::common::AudioUuid;
+
+extern "C" binder_exception_t createEffect(const AudioUuid* in_impl_uuid,
+                                           std::shared_ptr<IEffect>* instanceSpp) {
+    if (!in_impl_uuid || *in_impl_uuid != kDownmixImplUUID) {
+        LOG(ERROR) << __func__ << "uuid not supported";
+        return EX_ILLEGAL_ARGUMENT;
+    }
+    if (instanceSpp) {
+        *instanceSpp = ndk::SharedRefBase::make<DownmixImpl>();
+        LOG(DEBUG) << __func__ << " instance " << instanceSpp->get() << " created";
+        return EX_NONE;
+    } else {
+        LOG(ERROR) << __func__ << " invalid input parameter!";
+        return EX_ILLEGAL_ARGUMENT;
+    }
+}
+
+extern "C" binder_exception_t queryEffect(const AudioUuid* in_impl_uuid, Descriptor* _aidl_return) {
+    if (!in_impl_uuid || *in_impl_uuid != kDownmixImplUUID) {
+        LOG(ERROR) << __func__ << "uuid not supported";
+        return EX_ILLEGAL_ARGUMENT;
+    }
+    *_aidl_return = DownmixImpl::kDescriptor;
+    return EX_NONE;
+}
+
+namespace aidl::android::hardware::audio::effect {
+
+const std::string DownmixImpl::kEffectName = "Multichannel Downmix To Stereo";
+const Descriptor DownmixImpl::kDescriptor = {
+        .common = {
+                .id = {.type = kDownmixTypeUUID, .uuid = kDownmixImplUUID, .proxy = std::nullopt},
+                .flags = {.type = Flags::Type::INSERT, .insert = Flags::Insert::FIRST},
+                .name = DownmixImpl::kEffectName,
+                .implementor = "The Android Open Source Project"}};
+
+ndk::ScopedAStatus DownmixImpl::getDescriptor(Descriptor* _aidl_return) {
+    RETURN_IF(!_aidl_return, EX_ILLEGAL_ARGUMENT, "Parameter:nullptr");
+    LOG(DEBUG) << __func__ << kDescriptor.toString();
+    *_aidl_return = kDescriptor;
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus DownmixImpl::setParameterCommon(const Parameter& param) {
+    RETURN_IF(!mContext, EX_NULL_POINTER, "nullContext");
+
+    auto tag = param.getTag();
+    switch (tag) {
+        case Parameter::common:
+            RETURN_IF(mContext->setCommon(param.get<Parameter::common>()) != RetCode::SUCCESS,
+                      EX_ILLEGAL_ARGUMENT, "setCommFailed");
+            break;
+        case Parameter::deviceDescription:
+            RETURN_IF(mContext->setOutputDevice(param.get<Parameter::deviceDescription>()) !=
+                              RetCode::SUCCESS,
+                      EX_ILLEGAL_ARGUMENT, "setDeviceFailed");
+            break;
+        case Parameter::mode:
+            RETURN_IF(mContext->setAudioMode(param.get<Parameter::mode>()) != RetCode::SUCCESS,
+                      EX_ILLEGAL_ARGUMENT, "setModeFailed");
+            break;
+        case Parameter::source:
+            RETURN_IF(mContext->setAudioSource(param.get<Parameter::source>()) != RetCode::SUCCESS,
+                      EX_ILLEGAL_ARGUMENT, "setSourceFailed");
+            break;
+        case Parameter::volumeStereo:
+            RETURN_IF(mContext->setVolumeStereo(param.get<Parameter::volumeStereo>()) !=
+                              RetCode::SUCCESS,
+                      EX_ILLEGAL_ARGUMENT, "setVolumeStereoFailed");
+            break;
+        default: {
+            LOG(ERROR) << __func__ << " unsupportedParameterTag " << toString(tag);
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "commonParamNotSupported");
+        }
+    }
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus DownmixImpl::commandImpl(CommandId command) {
+    RETURN_IF(!mContext, EX_NULL_POINTER, "nullContext");
+    switch (command) {
+        case CommandId::START:
+            mContext->enable();
+            break;
+        case CommandId::STOP:
+            mContext->disable();
+            break;
+        case CommandId::RESET:
+            mContext->reset();
+            break;
+        default:
+            LOG(ERROR) << __func__ << " commandId " << toString(command) << " not supported";
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "commandIdNotSupported");
+    }
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus DownmixImpl::setParameterSpecific(const Parameter::Specific& specific) {
+    RETURN_IF(Parameter::Specific::downmix != specific.getTag(), EX_ILLEGAL_ARGUMENT,
+              "EffectNotSupported");
+    RETURN_IF(!mContext, EX_NULL_POINTER, "nullContext");
+
+    auto& dmParam = specific.get<Parameter::Specific::downmix>();
+    auto tag = dmParam.getTag();
+
+    switch (tag) {
+        case Downmix::type: {
+            RETURN_IF(mContext->setDmType(dmParam.get<Downmix::type>()) != RetCode::SUCCESS,
+                      EX_ILLEGAL_ARGUMENT, "setTypeFailed");
+            return ndk::ScopedAStatus::ok();
+        }
+        default: {
+            LOG(ERROR) << __func__ << " unsupported tag: " << toString(tag);
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "DownmixTagNotSupported");
+        }
+    }
+}
+
+ndk::ScopedAStatus DownmixImpl::getParameterSpecific(const Parameter::Id& id,
+                                                     Parameter::Specific* specific) {
+    RETURN_IF(!specific, EX_NULL_POINTER, "nullPtr");
+    auto tag = id.getTag();
+    RETURN_IF(Parameter::Id::downmixTag != tag, EX_ILLEGAL_ARGUMENT, "wrongIdTag");
+    auto dmId = id.get<Parameter::Id::downmixTag>();
+    auto dmIdTag = dmId.getTag();
+    switch (dmIdTag) {
+        case Downmix::Id::commonTag:
+            return getParameterDownmix(dmId.get<Downmix::Id::commonTag>(), specific);
+        default:
+            LOG(ERROR) << __func__ << " unsupported tag: " << toString(dmIdTag);
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "DownmixTagNotSupported");
+    }
+}
+
+ndk::ScopedAStatus DownmixImpl::getParameterDownmix(const Downmix::Tag& tag,
+                                                    Parameter::Specific* specific) {
+    RETURN_IF(!mContext, EX_NULL_POINTER, "nullContext");
+
+    Downmix dmParam;
+    switch (tag) {
+        case Downmix::type: {
+            dmParam.set<Downmix::type>(mContext->getDmType());
+            break;
+        }
+        default: {
+            LOG(ERROR) << __func__ << " unsupported tag: " << toString(tag);
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "DownmixTagNotSupported");
+        }
+    }
+
+    specific->set<Parameter::Specific::downmix>(dmParam);
+    return ndk::ScopedAStatus::ok();
+}
+
+std::shared_ptr<EffectContext> DownmixImpl::createContext(const Parameter::Common& common) {
+    if (mContext) {
+        LOG(DEBUG) << __func__ << " context already exist";
+        return mContext;
+    }
+
+    mContext = std::make_shared<DownmixContext>(1 /* statusFmqDepth */, common);
+    return mContext;
+}
+
+RetCode DownmixImpl::releaseContext() {
+    if (mContext) {
+        mContext.reset();
+    }
+    return RetCode::SUCCESS;
+}
+
+// Processing method running in EffectWorker thread.
+IEffect::Status DownmixImpl::effectProcessImpl(float* in, float* out, int sampleToProcess) {
+    if (!mContext) {
+        LOG(ERROR) << __func__ << " nullContext";
+        return {EX_NULL_POINTER, 0, 0};
+    }
+    return mContext->lvmProcess(in, out, sampleToProcess);
+}
+
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/libeffects/downmix/aidl/EffectDownmix.h b/media/libeffects/downmix/aidl/EffectDownmix.h
new file mode 100644
index 0000000..d590133
--- /dev/null
+++ b/media/libeffects/downmix/aidl/EffectDownmix.h
@@ -0,0 +1,55 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <aidl/android/hardware/audio/effect/BnEffect.h>
+#include <audio_effects/effect_downmix.h>
+
+#include "DownmixContext.h"
+#include "effect-impl/EffectImpl.h"
+#include "effect-impl/EffectUUID.h"
+
+namespace aidl::android::hardware::audio::effect {
+
+class DownmixImpl final : public EffectImpl {
+  public:
+    static const std::string kEffectName;
+    static const Descriptor kDescriptor;
+    DownmixImpl() { LOG(DEBUG) << __func__; }
+    ~DownmixImpl() {
+        cleanUp();
+        LOG(DEBUG) << __func__;
+    }
+
+    ndk::ScopedAStatus commandImpl(CommandId command) override;
+    ndk::ScopedAStatus getDescriptor(Descriptor* _aidl_return) override;
+    ndk::ScopedAStatus setParameterCommon(const Parameter& param) override;
+    ndk::ScopedAStatus setParameterSpecific(const Parameter::Specific& specific) override;
+    ndk::ScopedAStatus getParameterSpecific(const Parameter::Id& id,
+                                            Parameter::Specific* specific) override;
+    IEffect::Status effectProcessImpl(float* in, float* out, int process) override;
+    std::shared_ptr<EffectContext> createContext(const Parameter::Common& common) override;
+    RetCode releaseContext() override;
+
+    std::shared_ptr<EffectContext> getContext() override { return mContext; }
+    std::string getEffectName() override { return kEffectName; }
+
+  private:
+    std::shared_ptr<DownmixContext> mContext;
+    ndk::ScopedAStatus getParameterDownmix(const Downmix::Tag& tag, Parameter::Specific* specific);
+};
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/libeffects/loudness/Android.bp b/media/libeffects/loudness/Android.bp
index bcd6947..fc0217b 100644
--- a/media/libeffects/loudness/Android.bp
+++ b/media/libeffects/loudness/Android.bp
@@ -44,3 +44,32 @@
 
     header_libs: ["libaudioeffects"],
 }
+
+cc_library_shared {
+    name: "libloudnessenhanceraidl",
+    srcs: [
+        "aidl/EffectLoudnessEnhancer.cpp",
+        "aidl/LoudnessEnhancerContext.cpp",
+        "dsp/core/dynamic_range_compression.cpp",
+        ":effectCommonFile",
+    ],
+    defaults: [
+        "aidlaudioservice_defaults",
+        "latest_android_hardware_audio_effect_ndk_shared",
+        "latest_android_media_audio_common_types_ndk_shared",
+    ],
+    header_libs: [
+        "libaudioeffects",
+        "libhardware_headers",
+    ],
+    cflags: [
+        "-Wthread-safety",
+    ],
+    shared_libs: [
+        "libcutils",
+        "liblog",
+    ],
+    visibility: [
+        "//hardware/interfaces/audio/aidl/default",
+    ],
+}
diff --git a/media/libeffects/loudness/aidl/EffectLoudnessEnhancer.cpp b/media/libeffects/loudness/aidl/EffectLoudnessEnhancer.cpp
new file mode 100644
index 0000000..9d8bc80
--- /dev/null
+++ b/media/libeffects/loudness/aidl/EffectLoudnessEnhancer.cpp
@@ -0,0 +1,182 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "AHAL_LoudnessEnhancerImpl"
+
+#include <android-base/logging.h>
+
+#include "EffectLoudnessEnhancer.h"
+
+using aidl::android::hardware::audio::effect::Descriptor;
+using aidl::android::hardware::audio::effect::IEffect;
+using aidl::android::hardware::audio::effect::kLoudnessEnhancerImplUUID;
+using aidl::android::hardware::audio::effect::LoudnessEnhancerImpl;
+using aidl::android::hardware::audio::effect::State;
+using aidl::android::media::audio::common::AudioUuid;
+
+extern "C" binder_exception_t createEffect(const AudioUuid* in_impl_uuid,
+                                           std::shared_ptr<IEffect>* instanceSpp) {
+    if (!in_impl_uuid || *in_impl_uuid != kLoudnessEnhancerImplUUID) {
+        LOG(ERROR) << __func__ << "uuid not supported";
+        return EX_ILLEGAL_ARGUMENT;
+    }
+    if (instanceSpp) {
+        *instanceSpp = ndk::SharedRefBase::make<LoudnessEnhancerImpl>();
+        LOG(DEBUG) << __func__ << " instance " << instanceSpp->get() << " created";
+        return EX_NONE;
+    } else {
+        LOG(ERROR) << __func__ << " invalid input parameter!";
+        return EX_ILLEGAL_ARGUMENT;
+    }
+}
+
+extern "C" binder_exception_t queryEffect(const AudioUuid* in_impl_uuid, Descriptor* _aidl_return) {
+    if (!in_impl_uuid || *in_impl_uuid != kLoudnessEnhancerImplUUID) {
+        LOG(ERROR) << __func__ << "uuid not supported";
+        return EX_ILLEGAL_ARGUMENT;
+    }
+    *_aidl_return = LoudnessEnhancerImpl::kDescriptor;
+    return EX_NONE;
+}
+
+namespace aidl::android::hardware::audio::effect {
+
+const std::string LoudnessEnhancerImpl::kEffectName = "Loudness Enhancer";
+const Descriptor LoudnessEnhancerImpl::kDescriptor = {
+        .common = {.id = {.type = kLoudnessEnhancerTypeUUID,
+                          .uuid = kLoudnessEnhancerImplUUID,
+                          .proxy = std::nullopt},
+                   .flags = {.type = Flags::Type::INSERT, .insert = Flags::Insert::FIRST},
+                   .name = LoudnessEnhancerImpl::kEffectName,
+                   .implementor = "The Android Open Source Project"}};
+
+ndk::ScopedAStatus LoudnessEnhancerImpl::getDescriptor(Descriptor* _aidl_return) {
+    RETURN_IF(!_aidl_return, EX_ILLEGAL_ARGUMENT, "Parameter:nullptr");
+    LOG(DEBUG) << __func__ << kDescriptor.toString();
+    *_aidl_return = kDescriptor;
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus LoudnessEnhancerImpl::commandImpl(CommandId command) {
+    RETURN_IF(!mContext, EX_NULL_POINTER, "nullContext");
+    switch (command) {
+        case CommandId::START:
+            mContext->enable();
+            break;
+        case CommandId::STOP:
+            mContext->disable();
+            break;
+        case CommandId::RESET:
+            mContext->disable();
+            mContext->resetBuffer();
+            break;
+        default:
+            LOG(ERROR) << __func__ << " commandId " << toString(command) << " not supported";
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(EX_ILLEGAL_ARGUMENT,
+                                                                    "commandIdNotSupported");
+    }
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus LoudnessEnhancerImpl::setParameterSpecific(const Parameter::Specific& specific) {
+    RETURN_IF(Parameter::Specific::loudnessEnhancer != specific.getTag(), EX_ILLEGAL_ARGUMENT,
+              "EffectNotSupported");
+    RETURN_IF(!mContext, EX_NULL_POINTER, "nullContext");
+
+    auto& leParam = specific.get<Parameter::Specific::loudnessEnhancer>();
+    auto tag = leParam.getTag();
+
+    switch (tag) {
+        case LoudnessEnhancer::gainMb: {
+            RETURN_IF(mContext->setLeGain(leParam.get<LoudnessEnhancer::gainMb>()) !=
+                              RetCode::SUCCESS,
+                      EX_ILLEGAL_ARGUMENT, "setGainMbFailed");
+            return ndk::ScopedAStatus::ok();
+        }
+        default: {
+            LOG(ERROR) << __func__ << " unsupported tag: " << toString(tag);
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(
+                    EX_ILLEGAL_ARGUMENT, "LoudnessEnhancerTagNotSupported");
+        }
+    }
+}
+
+ndk::ScopedAStatus LoudnessEnhancerImpl::getParameterSpecific(const Parameter::Id& id,
+                                                              Parameter::Specific* specific) {
+    RETURN_IF(!specific, EX_NULL_POINTER, "nullPtr");
+    auto tag = id.getTag();
+    RETURN_IF(Parameter::Id::loudnessEnhancerTag != tag, EX_ILLEGAL_ARGUMENT, "wrongIdTag");
+    auto leId = id.get<Parameter::Id::loudnessEnhancerTag>();
+    auto leIdTag = leId.getTag();
+    switch (leIdTag) {
+        case LoudnessEnhancer::Id::commonTag:
+            return getParameterLoudnessEnhancer(leId.get<LoudnessEnhancer::Id::commonTag>(),
+                                                specific);
+        default:
+            LOG(ERROR) << __func__ << " unsupported tag: " << toString(leIdTag);
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(
+                    EX_ILLEGAL_ARGUMENT, "LoudnessEnhancerTagNotSupported");
+    }
+}
+
+ndk::ScopedAStatus LoudnessEnhancerImpl::getParameterLoudnessEnhancer(
+        const LoudnessEnhancer::Tag& tag, Parameter::Specific* specific) {
+    RETURN_IF(!mContext, EX_NULL_POINTER, "nullContext");
+
+    LoudnessEnhancer leParam;
+    switch (tag) {
+        case LoudnessEnhancer::gainMb: {
+            leParam.set<LoudnessEnhancer::gainMb>(mContext->getLeGain());
+            break;
+        }
+        default: {
+            LOG(ERROR) << __func__ << " unsupported tag: " << toString(tag);
+            return ndk::ScopedAStatus::fromExceptionCodeWithMessage(
+                    EX_ILLEGAL_ARGUMENT, "LoudnessEnhancerTagNotSupported");
+        }
+    }
+
+    specific->set<Parameter::Specific::loudnessEnhancer>(leParam);
+    return ndk::ScopedAStatus::ok();
+}
+
+std::shared_ptr<EffectContext> LoudnessEnhancerImpl::createContext(
+        const Parameter::Common& common) {
+    if (mContext) {
+        LOG(DEBUG) << __func__ << " context already exist";
+        return mContext;
+    }
+
+    mContext = std::make_shared<LoudnessEnhancerContext>(1 /* statusFmqDepth */, common);
+    return mContext;
+}
+
+RetCode LoudnessEnhancerImpl::releaseContext() {
+    if (mContext) {
+        mContext->disable();
+        mContext->resetBuffer();
+    }
+    return RetCode::SUCCESS;
+}
+
+// Processing method running in EffectWorker thread.
+IEffect::Status LoudnessEnhancerImpl::effectProcessImpl(float* in, float* out, int samples) {
+    IEffect::Status status = {EX_NULL_POINTER, 0, 0};
+    RETURN_VALUE_IF(!mContext, status, "nullContext");
+    return mContext->lvmProcess(in, out, samples);
+}
+
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/libeffects/loudness/aidl/EffectLoudnessEnhancer.h b/media/libeffects/loudness/aidl/EffectLoudnessEnhancer.h
new file mode 100644
index 0000000..6402fd2
--- /dev/null
+++ b/media/libeffects/loudness/aidl/EffectLoudnessEnhancer.h
@@ -0,0 +1,55 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <aidl/android/hardware/audio/effect/BnEffect.h>
+
+#include "effect-impl/EffectImpl.h"
+#include "effect-impl/EffectUUID.h"
+#include "LoudnessEnhancerContext.h"
+
+namespace aidl::android::hardware::audio::effect {
+
+class LoudnessEnhancerImpl final : public EffectImpl {
+  public:
+    static const std::string kEffectName;
+    static const Descriptor kDescriptor;
+    LoudnessEnhancerImpl() { LOG(DEBUG) << __func__; }
+    ~LoudnessEnhancerImpl() {
+        cleanUp();
+        LOG(DEBUG) << __func__;
+    }
+
+    ndk::ScopedAStatus commandImpl(CommandId command) override;
+    ndk::ScopedAStatus getDescriptor(Descriptor* _aidl_return) override;
+    ndk::ScopedAStatus setParameterSpecific(const Parameter::Specific& specific) override;
+    ndk::ScopedAStatus getParameterSpecific(const Parameter::Id& id,
+                                            Parameter::Specific* specific) override;
+    IEffect::Status effectProcessImpl(float* in, float* out, int process) override;
+    std::shared_ptr<EffectContext> createContext(const Parameter::Common& common) override;
+    RetCode releaseContext() override;
+
+    std::shared_ptr<EffectContext> getContext() override { return mContext; }
+    std::string getEffectName() override { return kEffectName; }
+
+  private:
+    std::shared_ptr<LoudnessEnhancerContext> mContext;
+    ndk::ScopedAStatus getParameterLoudnessEnhancer(const LoudnessEnhancer::Tag& tag,
+                                                    Parameter::Specific* specific);
+};
+
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/libeffects/loudness/aidl/LoudnessEnhancerContext.cpp b/media/libeffects/loudness/aidl/LoudnessEnhancerContext.cpp
new file mode 100644
index 0000000..033b222
--- /dev/null
+++ b/media/libeffects/loudness/aidl/LoudnessEnhancerContext.cpp
@@ -0,0 +1,130 @@
+/*
+ * 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 "LoudnessEnhancerContext.h"
+
+namespace aidl::android::hardware::audio::effect {
+
+LoudnessEnhancerContext::LoudnessEnhancerContext(int statusDepth, const Parameter::Common& common)
+    : EffectContext(statusDepth, common) {
+    LOG(DEBUG) << __func__;
+    mState = LOUDNESS_ENHANCER_STATE_UNINITIALIZED;
+    mSampleRate = common.input.base.sampleRate;
+    init_params();
+}
+
+LoudnessEnhancerContext::~LoudnessEnhancerContext() {
+    LOG(DEBUG) << __func__;
+    mState = LOUDNESS_ENHANCER_STATE_UNINITIALIZED;
+}
+
+RetCode LoudnessEnhancerContext::enable() {
+    if (mState != LOUDNESS_ENHANCER_STATE_INITIALIZED) {
+        return RetCode::ERROR_EFFECT_LIB_ERROR;
+    }
+    mState = LOUDNESS_ENHANCER_STATE_ACTIVE;
+    return RetCode::SUCCESS;
+}
+
+RetCode LoudnessEnhancerContext::disable() {
+    if (mState != LOUDNESS_ENHANCER_STATE_ACTIVE) {
+        return RetCode::ERROR_EFFECT_LIB_ERROR;
+    }
+    mState = LOUDNESS_ENHANCER_STATE_INITIALIZED;
+    return RetCode::SUCCESS;
+}
+
+void LoudnessEnhancerContext::reset() {
+    float targetAmp = pow(10, mGain / 2000.0f);  // mB to linear amplification
+    {
+        std::lock_guard lg(mMutex);
+        if (mCompressor != nullptr) {
+            // Get samplingRate from input
+            mCompressor->Initialize(targetAmp, mSampleRate);
+        }
+    }
+}
+
+RetCode LoudnessEnhancerContext::setLeGain(int gainMb) {
+    mGain = gainMb;
+    reset();  // apply parameter update
+    return RetCode::SUCCESS;
+}
+
+IEffect::Status LoudnessEnhancerContext::lvmProcess(float* in, float* out, int samples) {
+    LOG(DEBUG) << __func__ << " in " << in << " out " << out << " sample " << samples;
+
+    IEffect::Status status = {EX_NULL_POINTER, 0, 0};
+    RETURN_VALUE_IF(!in, status, "nullInput");
+    RETURN_VALUE_IF(!out, status, "nullOutput");
+    status = {EX_ILLEGAL_STATE, 0, 0};
+    RETURN_VALUE_IF(getInputFrameSize() != getOutputFrameSize(), status, "FrameSizeMismatch");
+    auto frameSize = getInputFrameSize();
+    RETURN_VALUE_IF(0 == frameSize, status, "zeroFrameSize");
+
+    LOG(DEBUG) << __func__ << " start processing";
+    {
+        std::lock_guard lg(mMutex);
+        // PcmType is always expected to be Float 32 bit.
+        constexpr float scale = 1 << 15;  // power of 2 is lossless conversion to int16_t range
+        constexpr float inverseScale = 1.f / scale;
+        const float inputAmp = pow(10, mGain / 2000.0f) * scale;
+        float leftSample, rightSample;
+        if (mCompressor != nullptr) {
+            for (int inIdx = 0; inIdx < samples; inIdx += 2) {
+                // makeup gain is applied on the input of the compressor
+                leftSample = inputAmp * in[inIdx];
+                rightSample = inputAmp * in[inIdx + 1];
+                mCompressor->Compress(&leftSample, &rightSample);
+                in[inIdx] = leftSample * inverseScale;
+                in[inIdx + 1] = rightSample * inverseScale;
+            }
+        } else {
+            for (int inIdx = 0; inIdx < samples; inIdx += 2) {
+                leftSample = inputAmp * in[inIdx];
+                rightSample = inputAmp * in[inIdx + 1];
+                in[inIdx] = leftSample * inverseScale;
+                in[inIdx + 1] = rightSample * inverseScale;
+            }
+        }
+        bool accumulate = false;
+        if (in != out) {
+            for (int i = 0; i < samples; i++) {
+                if (accumulate) {
+                    out[i] += in[i];
+                } else {
+                    out[i] = in[i];
+                }
+            }
+        }
+    }
+    return {STATUS_OK, samples, samples};
+}
+
+void LoudnessEnhancerContext::init_params() {
+    mGain = LOUDNESS_ENHANCER_DEFAULT_TARGET_GAIN_MB;
+    float targetAmp = pow(10, mGain / 2000.0f);  // mB to linear amplification
+    LOG(DEBUG) << __func__ << "Target gain = " << mGain << "mB <=> factor = " << targetAmp;
+
+    {
+        std::lock_guard lg(mMutex);
+        mCompressor = std::make_unique<le_fx::AdaptiveDynamicRangeCompression>();
+        mCompressor->Initialize(targetAmp, mSampleRate);
+    }
+    mState = LOUDNESS_ENHANCER_STATE_INITIALIZED;
+}
+
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/libeffects/loudness/aidl/LoudnessEnhancerContext.h b/media/libeffects/loudness/aidl/LoudnessEnhancerContext.h
new file mode 100644
index 0000000..b478b27
--- /dev/null
+++ b/media/libeffects/loudness/aidl/LoudnessEnhancerContext.h
@@ -0,0 +1,58 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <android-base/thread_annotations.h>
+#include <audio_effects/effect_loudnessenhancer.h>
+
+#include "dsp/core/dynamic_range_compression.h"
+#include "effect-impl/EffectContext.h"
+
+namespace aidl::android::hardware::audio::effect {
+
+enum LoudnessEnhancerState {
+    LOUDNESS_ENHANCER_STATE_UNINITIALIZED,
+    LOUDNESS_ENHANCER_STATE_INITIALIZED,
+    LOUDNESS_ENHANCER_STATE_ACTIVE,
+};
+
+class LoudnessEnhancerContext final : public EffectContext {
+  public:
+    LoudnessEnhancerContext(int statusDepth, const Parameter::Common& common);
+    ~LoudnessEnhancerContext();
+
+    RetCode enable();
+    RetCode disable();
+    void reset();
+
+    RetCode setLeGain(int gainMb);
+    int getLeGain() const { return mGain; }
+
+    IEffect::Status lvmProcess(float* in, float* out, int samples);
+
+  private:
+    std::mutex mMutex;
+    LoudnessEnhancerState mState;
+    int mSampleRate;
+    int mGain;
+    // In this implementation, there is no coupling between the compression on the left and right
+    // channels
+    std::unique_ptr<le_fx::AdaptiveDynamicRangeCompression> mCompressor GUARDED_BY(mMutex);
+
+    void init_params();
+};
+}  // namespace aidl::android::hardware::audio::effect
diff --git a/media/module/extractors/mp4/MPEG4Extractor.cpp b/media/module/extractors/mp4/MPEG4Extractor.cpp
index 8f8fc1b..3a5a869 100644
--- a/media/module/extractors/mp4/MPEG4Extractor.cpp
+++ b/media/module/extractors/mp4/MPEG4Extractor.cpp
@@ -394,6 +394,15 @@
             return MEDIA_MIMETYPE_AUDIO_MPEGH_MHA1;
         case FOURCC("mhm1"):
             return MEDIA_MIMETYPE_AUDIO_MPEGH_MHM1;
+        case FOURCC("dtsc"):
+            return MEDIA_MIMETYPE_AUDIO_DTS;
+        case FOURCC("dtse"):
+        case FOURCC("dtsh"):
+            return MEDIA_MIMETYPE_AUDIO_DTS_HD;
+        case FOURCC("dtsl"):
+            return MEDIA_MIMETYPE_AUDIO_DTS_HD_MA;
+        case FOURCC("dtsx"):
+            return MEDIA_MIMETYPE_AUDIO_DTS_UHD_P2;
         default:
             ALOGW("Unknown fourcc: %c%c%c%c",
                    (fourcc >> 24) & 0xff,
@@ -1804,6 +1813,11 @@
         case 0x6D730055: // "ms U" mp3 audio
         case FOURCC("mha1"):
         case FOURCC("mhm1"):
+        case FOURCC("dtsc"):
+        case FOURCC("dtse"):
+        case FOURCC("dtsh"):
+        case FOURCC("dtsl"):
+        case FOURCC("dtsx"):
         {
             if (mIsQT && depth >= 1 && mPath[depth - 1] == FOURCC("wave")) {
 
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index b8c39f4..3518037 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -68,16 +68,6 @@
 // media / notification / system volume.
 constexpr float IN_CALL_EARPIECE_HEADROOM_DB = 3.f;
 
-// Compressed formats for MSD module, ordered from most preferred to least preferred.
-static const std::vector<audio_format_t> msdCompressedFormatsOrder = {{
-        AUDIO_FORMAT_IEC60958, AUDIO_FORMAT_MAT_2_1, AUDIO_FORMAT_MAT_2_0, AUDIO_FORMAT_E_AC3,
-        AUDIO_FORMAT_AC3, AUDIO_FORMAT_PCM_16_BIT }};
-// Channel masks for MSD module, 3D > 2D > 1D ordering (most preferred to least preferred).
-static const std::vector<audio_channel_mask_t> msdSurroundChannelMasksOrder = {{
-        AUDIO_CHANNEL_OUT_3POINT1POINT2, AUDIO_CHANNEL_OUT_3POINT0POINT2,
-        AUDIO_CHANNEL_OUT_2POINT1POINT2, AUDIO_CHANNEL_OUT_2POINT0POINT2,
-        AUDIO_CHANNEL_OUT_5POINT1, AUDIO_CHANNEL_OUT_STEREO }};
-
 template <typename T>
 bool operator== (const SortedVector<T> &left, const SortedVector<T> &right)
 {
@@ -1644,10 +1634,28 @@
         const AudioProfileVector &sourceProfiles, const AudioProfileVector &sinkProfiles,
         audio_port_config *sourceConfig, audio_port_config *sinkConfig) const
 {
+    // Compressed formats for MSD module, ordered from most preferred to least preferred.
+    static const std::vector<audio_format_t> formatsOrder = {{
+            AUDIO_FORMAT_IEC60958, AUDIO_FORMAT_MAT_2_1, AUDIO_FORMAT_MAT_2_0, AUDIO_FORMAT_E_AC3,
+            AUDIO_FORMAT_AC3, AUDIO_FORMAT_PCM_16_BIT }};
+    static const std::vector<audio_channel_mask_t> channelMasksOrder = [](){
+        // Channel position masks for MSD module, 3D > 2D > 1D ordering (most preferred to least
+        // preferred).
+        std::vector<audio_channel_mask_t> masks = {{
+            AUDIO_CHANNEL_OUT_3POINT1POINT2, AUDIO_CHANNEL_OUT_3POINT0POINT2,
+            AUDIO_CHANNEL_OUT_2POINT1POINT2, AUDIO_CHANNEL_OUT_2POINT0POINT2,
+            AUDIO_CHANNEL_OUT_5POINT1, AUDIO_CHANNEL_OUT_STEREO }};
+        // insert index masks (higher counts most preferred) as preferred over position masks
+        for (int i = 1; i <= AUDIO_CHANNEL_COUNT_MAX; i++) {
+            masks.insert(
+                    masks.begin(), audio_channel_mask_for_index_assignment_from_count(i));
+        }
+        return masks;
+    }();
+
     struct audio_config_base bestSinkConfig;
-    status_t result = findBestMatchingOutputConfig(sourceProfiles, sinkProfiles,
-            msdCompressedFormatsOrder, msdSurroundChannelMasksOrder,
-            true /*preferHigherSamplingRates*/, bestSinkConfig);
+    status_t result = findBestMatchingOutputConfig(sourceProfiles, sinkProfiles, formatsOrder,
+            channelMasksOrder, true /*preferHigherSamplingRates*/, bestSinkConfig);
     if (result != NO_ERROR) {
         ALOGD("%s() no matching config found for sink, hwAvSync: %d",
                 __func__, hwAvSync);
@@ -1669,7 +1677,10 @@
     }
     sourceConfig->sample_rate = bestSinkConfig.sample_rate;
     // Specify exact channel mask to prevent guessing by bit count in PatchPanel.
-    sourceConfig->channel_mask = audio_channel_mask_out_to_in(bestSinkConfig.channel_mask);
+    sourceConfig->channel_mask =
+            audio_channel_mask_get_representation(bestSinkConfig.channel_mask)
+            == AUDIO_CHANNEL_REPRESENTATION_INDEX ?
+            bestSinkConfig.channel_mask : audio_channel_mask_out_to_in(bestSinkConfig.channel_mask);
     sourceConfig->format = bestSinkConfig.format;
     // Copy input stream directly without any processing (e.g. resampling).
     sourceConfig->flags.input = static_cast<audio_input_flags_t>(
diff --git a/services/audiopolicy/tests/audiopolicymanager_tests.cpp b/services/audiopolicy/tests/audiopolicymanager_tests.cpp
index d51c57c..c341b32 100644
--- a/services/audiopolicy/tests/audiopolicymanager_tests.cpp
+++ b/services/audiopolicy/tests/audiopolicymanager_tests.cpp
@@ -446,7 +446,7 @@
     sp<AudioProfile> ac3OutputProfile = new AudioProfile(
             AUDIO_FORMAT_AC3, AUDIO_CHANNEL_OUT_5POINT1, k48000SamplingRate);
     sp<AudioProfile> iec958OutputProfile = new AudioProfile(
-            AUDIO_FORMAT_IEC60958, AUDIO_CHANNEL_OUT_STEREO, k48000SamplingRate);
+            AUDIO_FORMAT_IEC60958, AUDIO_CHANNEL_INDEX_MASK_24, k48000SamplingRate);
     mMsdOutputDevice->addAudioProfile(pcmOutputProfile);
     mMsdOutputDevice->addAudioProfile(ac3OutputProfile);
     mMsdOutputDevice->addAudioProfile(iec958OutputProfile);
@@ -519,7 +519,7 @@
     // Add HDMI input device with IEC60958 profile for HDMI in -> MSD patching.
     mHdmiInputDevice = new DeviceDescriptor(AUDIO_DEVICE_IN_HDMI);
     sp<AudioProfile> iec958InputProfile = new AudioProfile(
-            AUDIO_FORMAT_IEC60958, AUDIO_CHANNEL_IN_STEREO, k48000SamplingRate);
+            AUDIO_FORMAT_IEC60958, AUDIO_CHANNEL_INDEX_MASK_24, k48000SamplingRate);
     mHdmiInputDevice->addAudioProfile(iec958InputProfile);
     config.addDevice(mHdmiInputDevice);
     sp<InputProfile> hdmiInputProfile = new InputProfile("hdmi input");
@@ -677,8 +677,8 @@
     ASSERT_EQ(AUDIO_PORT_ROLE_SINK, patch->mPatch.sinks[0].role);
     ASSERT_EQ(AUDIO_FORMAT_IEC60958, patch->mPatch.sources[0].format);
     ASSERT_EQ(AUDIO_FORMAT_IEC60958, patch->mPatch.sinks[0].format);
-    ASSERT_EQ(AUDIO_CHANNEL_IN_STEREO, patch->mPatch.sources[0].channel_mask);
-    ASSERT_EQ(AUDIO_CHANNEL_OUT_STEREO, patch->mPatch.sinks[0].channel_mask);
+    ASSERT_EQ(AUDIO_CHANNEL_INDEX_MASK_24, patch->mPatch.sources[0].channel_mask);
+    ASSERT_EQ(AUDIO_CHANNEL_INDEX_MASK_24, patch->mPatch.sinks[0].channel_mask);
     ASSERT_EQ(k48000SamplingRate, patch->mPatch.sources[0].sample_rate);
     ASSERT_EQ(k48000SamplingRate, patch->mPatch.sinks[0].sample_rate);
     ASSERT_EQ(1, patchCount.deltaFromSnapshot());
@@ -754,7 +754,7 @@
     audio_config_base_t msdDirectConfig2 = AUDIO_CONFIG_BASE_INITIALIZER;
     msdDirectConfig2.format = AUDIO_FORMAT_IEC60958;
     msdDirectConfig2.sample_rate = 48000;
-    msdDirectConfig2.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
+    msdDirectConfig2.channel_mask = AUDIO_CHANNEL_INDEX_MASK_24;
 
     audio_config_base_t msdNonDirectConfig = AUDIO_CONFIG_BASE_INITIALIZER;
     msdNonDirectConfig.format = AUDIO_FORMAT_PCM_16_BIT;
@@ -821,7 +821,7 @@
     audio_config_t msdDirectConfig2 = AUDIO_CONFIG_INITIALIZER;
     msdDirectConfig2.format = AUDIO_FORMAT_IEC60958;
     msdDirectConfig2.sample_rate = 48000;
-    msdDirectConfig2.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
+    msdDirectConfig2.channel_mask = AUDIO_CHANNEL_INDEX_MASK_24;
 
     audio_config_t msdNonDirectConfig = AUDIO_CONFIG_INITIALIZER;
     msdNonDirectConfig.format = AUDIO_FORMAT_PCM_16_BIT;
diff --git a/services/camera/libcameraservice/device3/Camera3OutputStream.cpp b/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
index 84b5aa4..396104c 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
+++ b/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
@@ -1526,7 +1526,8 @@
                 vsyncTime.deadlineTimestamp >= currentTime &&
                 ((!cameraDisplayInSync && vsyncTime.expectedPresentationTime > minPresentT) ||
                  (cameraDisplayInSync && vsyncTime.expectedPresentationTime >
-                mLastPresentTime + minInterval + biasForShortDelay * kTimelineThresholdNs))) {
+                mLastPresentTime + minInterval +
+                    static_cast<nsecs_t>(biasForShortDelay * kTimelineThresholdNs)))) {
             expectedPresentT = vsyncTime.expectedPresentationTime;
             minDiff = std::abs(vsyncTime.expectedPresentationTime - idealPresentT);
         }