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) {