diff --git a/bluetooth/audio/aidl/Android.bp b/bluetooth/audio/aidl/Android.bp
new file mode 100644
index 0000000..60da877
--- /dev/null
+++ b/bluetooth/audio/aidl/Android.bp
@@ -0,0 +1,39 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+aidl_interface {
+    name: "android.hardware.bluetooth.audio",
+    vendor_available: true,
+    srcs: ["android/hardware/bluetooth/audio/*.aidl"],
+    stability: "vintf",
+    imports: [
+        "android.hardware.common-V2",
+        "android.hardware.common.fmq-V1",
+        "android.hardware.audio.common",
+    ],
+    backend: {
+        cpp: {
+            enabled: false,
+        },
+        java: {
+            sdk_version: "module_current",
+            enabled: false,
+        },
+        ndk: {
+            vndk: {
+                enabled: true,
+            },
+        },
+    },
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacCapabilities.aidl
new file mode 100644
index 0000000..ad44c26
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacCapabilities.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable AacCapabilities {
+  android.hardware.bluetooth.audio.AacObjectType objectType;
+  int[] sampleRateHz;
+  android.hardware.bluetooth.audio.ChannelMode channelMode;
+  boolean variableBitRateSupported;
+  byte[] bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacConfiguration.aidl
new file mode 100644
index 0000000..6adef6d
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacConfiguration.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable AacConfiguration {
+  android.hardware.bluetooth.audio.AacObjectType objectType;
+  int sampleRateHz;
+  android.hardware.bluetooth.audio.ChannelMode channelMode;
+  boolean variableBitRateEnabled;
+  byte bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacObjectType.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacObjectType.aidl
new file mode 100644
index 0000000..c129c66
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AacObjectType.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum AacObjectType {
+  MPEG2_LC = 1,
+  MPEG4_LC = 2,
+  MPEG4_LTP = 4,
+  MPEG4_SCALABLE = 8,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AptxCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AptxCapabilities.aidl
new file mode 100644
index 0000000..4767b69
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AptxCapabilities.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable AptxCapabilities {
+  int[] sampleRateHz;
+  android.hardware.bluetooth.audio.ChannelMode channelMode;
+  byte[] bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AptxConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AptxConfiguration.aidl
new file mode 100644
index 0000000..91e88b3
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AptxConfiguration.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable AptxConfiguration {
+  int sampleRateHz;
+  android.hardware.bluetooth.audio.ChannelMode channelMode;
+  byte bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioCapabilities.aidl
new file mode 100644
index 0000000..20a7731
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioCapabilities.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+union AudioCapabilities {
+  android.hardware.bluetooth.audio.PcmCapabilities pcmCapabilities;
+  android.hardware.bluetooth.audio.CodecCapabilities codecCapabilities;
+  android.hardware.bluetooth.audio.LeAudioCapabilities leAudioCapabilities;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioConfiguration.aidl
new file mode 100644
index 0000000..34f7837
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioConfiguration.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+union AudioConfiguration {
+  android.hardware.bluetooth.audio.PcmConfiguration pcmConfig;
+  android.hardware.bluetooth.audio.CodecConfiguration codecConfig;
+  android.hardware.bluetooth.audio.LeAudioConfiguration leAudioConfig;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioLocation.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioLocation.aidl
new file mode 100644
index 0000000..319a5e2
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/AudioLocation.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="int") @VintfStability
+enum AudioLocation {
+  UNKNOWN = 1,
+  FRONT_LEFT = 2,
+  FRONT_RIGHT = 4,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/BluetoothAudioStatus.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/BluetoothAudioStatus.aidl
new file mode 100644
index 0000000..7c0d825
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/BluetoothAudioStatus.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="int") @VintfStability
+enum BluetoothAudioStatus {
+  UNKNOWN = 0,
+  SUCCESS = 1,
+  UNSUPPORTED_CODEC_CONFIGURATION = 2,
+  FAILURE = 3,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/BroadcastConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/BroadcastConfiguration.aidl
new file mode 100644
index 0000000..b3aa709
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/BroadcastConfiguration.aidl
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable BroadcastConfiguration {
+  android.hardware.bluetooth.audio.BroadcastConfiguration.BroadcastStreamMap[] streamMap;
+  @VintfStability
+  parcelable BroadcastStreamMap {
+    char streamHandle;
+    int audioChannelAllocation;
+    android.hardware.bluetooth.audio.LeAudioCodecConfiguration leAudioCondecConfig;
+  }
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/ChannelMode.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/ChannelMode.aidl
new file mode 100644
index 0000000..3ca93c3
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/ChannelMode.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum ChannelMode {
+  UNKNOWN = 1,
+  MONO = 2,
+  STEREO = 4,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecCapabilities.aidl
new file mode 100644
index 0000000..b451880
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecCapabilities.aidl
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable CodecCapabilities {
+  android.hardware.bluetooth.audio.CodecType codecType;
+  android.hardware.bluetooth.audio.CodecCapabilities.Capabilities capabilities;
+  @VintfStability
+  union Capabilities {
+    android.hardware.bluetooth.audio.SbcCapabilities sbcCapabilities;
+    android.hardware.bluetooth.audio.AacCapabilities aacCapabilities;
+    android.hardware.bluetooth.audio.LdacCapabilities ldacCapabilities;
+    android.hardware.bluetooth.audio.AptxCapabilities aptxCapabilities;
+  }
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecConfiguration.aidl
new file mode 100644
index 0000000..863aee2
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecConfiguration.aidl
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable CodecConfiguration {
+  android.hardware.bluetooth.audio.CodecType codecType;
+  int encodedAudioBitrate;
+  int peerMtu;
+  boolean isScmstEnabled;
+  android.hardware.bluetooth.audio.CodecConfiguration.CodecSpecific config;
+  @VintfStability
+  union CodecSpecific {
+    android.hardware.bluetooth.audio.SbcConfiguration sbcConfig;
+    android.hardware.bluetooth.audio.AacConfiguration aacConfig;
+    android.hardware.bluetooth.audio.LdacConfiguration ldacConfig;
+    android.hardware.bluetooth.audio.AptxConfiguration aptxConfig;
+  }
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecType.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecType.aidl
new file mode 100644
index 0000000..44b434b
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/CodecType.aidl
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="int") @VintfStability
+enum CodecType {
+  UNKNOWN = 0,
+  SBC = 1,
+  AAC = 2,
+  APTX = 3,
+  APTX_HD = 4,
+  LDAC = 5,
+  LC3 = 6,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioPort.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioPort.aidl
new file mode 100644
index 0000000..e389ef3
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioPort.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+interface IBluetoothAudioPort {
+  android.hardware.bluetooth.audio.PresentationPosition getPresentationPosition();
+  void startStream();
+  void stopStream();
+  void suspendStream();
+  void updateMetadata(in android.hardware.audio.common.SourceMetadata sourceMetadata);
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioProvider.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioProvider.aidl
new file mode 100644
index 0000000..e5e79cb
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioProvider.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+interface IBluetoothAudioProvider {
+  void endSession();
+  android.hardware.common.fmq.MQDescriptor<byte,android.hardware.common.fmq.SynchronizedReadWrite> startSession(in android.hardware.bluetooth.audio.IBluetoothAudioPort hostIf, in android.hardware.bluetooth.audio.AudioConfiguration audioConfig);
+  void streamStarted(in android.hardware.bluetooth.audio.BluetoothAudioStatus status);
+  void streamSuspended(in android.hardware.bluetooth.audio.BluetoothAudioStatus status);
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioProviderFactory.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioProviderFactory.aidl
new file mode 100644
index 0000000..5e33deb
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/IBluetoothAudioProviderFactory.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+interface IBluetoothAudioProviderFactory {
+  android.hardware.bluetooth.audio.AudioCapabilities[] getProviderCapabilities(in android.hardware.bluetooth.audio.SessionType sessionType);
+  android.hardware.bluetooth.audio.IBluetoothAudioProvider openProvider(in android.hardware.bluetooth.audio.SessionType sessionType);
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/Lc3Capabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/Lc3Capabilities.aidl
new file mode 100644
index 0000000..3c650da
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/Lc3Capabilities.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable Lc3Capabilities {
+  byte[] pcmBitDepth;
+  int[] samplingFrequencyHz;
+  int[] frameDurationUs;
+  int[] octetsPerFrame;
+  byte[] blocksPerSdu;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/Lc3Configuration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/Lc3Configuration.aidl
new file mode 100644
index 0000000..ef77da7
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/Lc3Configuration.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable Lc3Configuration {
+  byte pcmBitDepth;
+  int samplingFrequencyHz;
+  int frameDurationUs;
+  int octetsPerFrame;
+  byte blocksPerSdu;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacCapabilities.aidl
new file mode 100644
index 0000000..19e041a
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacCapabilities.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable LdacCapabilities {
+  int[] sampleRateHz;
+  android.hardware.bluetooth.audio.LdacChannelMode channelMode;
+  android.hardware.bluetooth.audio.LdacQualityIndex qualityIndex;
+  byte[] bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacChannelMode.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacChannelMode.aidl
new file mode 100644
index 0000000..a9d6c5e
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacChannelMode.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum LdacChannelMode {
+  UNKNOWN = 1,
+  STEREO = 2,
+  DUAL = 4,
+  MONO = 8,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacConfiguration.aidl
new file mode 100644
index 0000000..8a37638
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacConfiguration.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable LdacConfiguration {
+  int sampleRateHz;
+  android.hardware.bluetooth.audio.LdacChannelMode channelMode;
+  android.hardware.bluetooth.audio.LdacQualityIndex qualityIndex;
+  byte bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacQualityIndex.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacQualityIndex.aidl
new file mode 100644
index 0000000..693392f
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LdacQualityIndex.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum LdacQualityIndex {
+  HIGH = 1,
+  MID = 2,
+  LOW = 4,
+  ABR = 8,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioCapabilities.aidl
new file mode 100644
index 0000000..a7224ca
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioCapabilities.aidl
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable LeAudioCapabilities {
+  android.hardware.bluetooth.audio.LeAudioMode mode;
+  android.hardware.bluetooth.audio.CodecType codecType;
+  android.hardware.bluetooth.audio.AudioLocation supportedChannel;
+  int supportedChannelCount;
+  android.hardware.bluetooth.audio.LeAudioCapabilities.LeAudioCodecCapabilities leAudioCodecCapabilities;
+  @VintfStability
+  parcelable VendorCapabilities {
+    ParcelableHolder extension;
+  }
+  @VintfStability
+  union LeAudioCodecCapabilities {
+    android.hardware.bluetooth.audio.Lc3Capabilities lc3Capabilities;
+    android.hardware.bluetooth.audio.LeAudioCapabilities.VendorCapabilities vendorCapabillities;
+  }
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioCodecConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioCodecConfiguration.aidl
new file mode 100644
index 0000000..bb3d7e4
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioCodecConfiguration.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+union LeAudioCodecConfiguration {
+  android.hardware.bluetooth.audio.Lc3Configuration lc3Config;
+  android.hardware.bluetooth.audio.LeAudioCodecConfiguration.VendorConfiguration vendorConfig;
+  @VintfStability
+  parcelable VendorConfiguration {
+    ParcelableHolder extension;
+  }
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioConfiguration.aidl
new file mode 100644
index 0000000..2bc1791
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioConfiguration.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable LeAudioConfiguration {
+  android.hardware.bluetooth.audio.LeAudioMode mode;
+  android.hardware.bluetooth.audio.LeAudioConfiguration.LeAudioModeConfig modeConfig;
+  android.hardware.bluetooth.audio.CodecType codecType;
+  @VintfStability
+  union LeAudioModeConfig {
+    android.hardware.bluetooth.audio.UnicastConfiguration unicastConfig;
+    android.hardware.bluetooth.audio.BroadcastConfiguration broadcastConfig;
+  }
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioMode.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioMode.aidl
new file mode 100644
index 0000000..766f637
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/LeAudioMode.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum LeAudioMode {
+  UNKNOWN = 0,
+  UNICAST = 1,
+  BROADCAST = 2,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PcmCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PcmCapabilities.aidl
new file mode 100644
index 0000000..6cfe5cd
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PcmCapabilities.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable PcmCapabilities {
+  int[] sampleRateHz;
+  android.hardware.bluetooth.audio.ChannelMode channelMode;
+  byte[] bitsPerSample;
+  int[] dataIntervalUs;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PcmConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PcmConfiguration.aidl
new file mode 100644
index 0000000..93d7805
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PcmConfiguration.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable PcmConfiguration {
+  int sampleRateHz;
+  android.hardware.bluetooth.audio.ChannelMode channelMode;
+  byte bitsPerSample;
+  int dataIntervalUs;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PresentationPosition.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PresentationPosition.aidl
new file mode 100644
index 0000000..7e997e8
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/PresentationPosition.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable PresentationPosition {
+  long remoteDeviceAudioDelayNanos;
+  long transmittedOctets;
+  android.hardware.bluetooth.audio.PresentationPosition.TimeSpec transmittedOctetsTimestamp;
+  @VintfStability
+  parcelable TimeSpec {
+    long tvSec;
+    long tvNSec;
+  }
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcAllocMethod.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcAllocMethod.aidl
new file mode 100644
index 0000000..5170f16
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcAllocMethod.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum SbcAllocMethod {
+  ALLOC_MD_S = 1,
+  ALLOC_MD_L = 2,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcCapabilities.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcCapabilities.aidl
new file mode 100644
index 0000000..ec3aa0f
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcCapabilities.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable SbcCapabilities {
+  int[] sampleRateHz;
+  android.hardware.bluetooth.audio.SbcChannelMode channelMode;
+  byte[] blockLength;
+  byte[] numSubbands;
+  android.hardware.bluetooth.audio.SbcAllocMethod allocMethod;
+  byte[] bitsPerSample;
+  int minBitpool;
+  int maxBitpool;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcChannelMode.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcChannelMode.aidl
new file mode 100644
index 0000000..88fca4a
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcChannelMode.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum SbcChannelMode {
+  UNKNOWN = 1,
+  JOINT_STEREO = 2,
+  STEREO = 4,
+  DUAL = 8,
+  MONO = 16,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcConfiguration.aidl
new file mode 100644
index 0000000..8eab9c3
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SbcConfiguration.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable SbcConfiguration {
+  int sampleRateHz;
+  android.hardware.bluetooth.audio.SbcChannelMode channelMode;
+  byte blockLength;
+  byte numSubbands;
+  android.hardware.bluetooth.audio.SbcAllocMethod allocMethod;
+  byte bitsPerSample;
+  int minBitpool;
+  int maxBitpool;
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SessionType.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SessionType.aidl
new file mode 100644
index 0000000..72d7fb2
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/SessionType.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@Backing(type="byte") @VintfStability
+enum SessionType {
+  UNKNOWN = 0,
+  A2DP_SOFTWARE_ENCODING_DATAPATH = 1,
+  A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH = 2,
+  HEARING_AID_SOFTWARE_ENCODING_DATAPATH = 3,
+  LE_AUDIO_SOFTWARE_ENCODING_DATAPATH = 4,
+  LE_AUDIO_SOFTWARE_DECODING_DATAPATH = 5,
+  LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH = 6,
+  LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH = 7,
+}
diff --git a/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/UnicastConfiguration.aidl b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/UnicastConfiguration.aidl
new file mode 100644
index 0000000..b385763
--- /dev/null
+++ b/bluetooth/audio/aidl/aidl_api/android.hardware.bluetooth.audio/current/android/hardware/bluetooth/audio/UnicastConfiguration.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.bluetooth.audio;
+@VintfStability
+parcelable UnicastConfiguration {
+  android.hardware.bluetooth.audio.UnicastConfiguration.UnicastStreamMap[] streamMap;
+  int peerDelay;
+  android.hardware.bluetooth.audio.LeAudioCodecConfiguration leAudioCodecConfig;
+  @VintfStability
+  parcelable UnicastStreamMap {
+    char streamHandle;
+    int audioChannelAllocation;
+  }
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacCapabilities.aidl
new file mode 100644
index 0000000..4303883
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacCapabilities.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.AacObjectType;
+import android.hardware.bluetooth.audio.ChannelMode;
+
+/**
+ * Used for Hardware Encoding AAC codec capabilities
+ */
+@VintfStability
+parcelable AacCapabilities {
+    /* bitfield */
+    AacObjectType objectType;
+    int[] sampleRateHz;
+    /* bitfield */
+    ChannelMode channelMode;
+    boolean variableBitRateSupported;
+    byte[] bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacConfiguration.aidl
new file mode 100644
index 0000000..30338e7
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacConfiguration.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.AacObjectType;
+import android.hardware.bluetooth.audio.ChannelMode;
+
+/**
+ * Used for Hardware Encoding AAC codec configuration
+ */
+@VintfStability
+parcelable AacConfiguration {
+    AacObjectType objectType;
+    int sampleRateHz;
+    ChannelMode channelMode;
+    boolean variableBitRateEnabled;
+    byte bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacObjectType.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacObjectType.aidl
new file mode 100644
index 0000000..480e422
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AacObjectType.aidl
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="byte")
+enum AacObjectType {
+    /**
+     * MPEG-2 Low Complexity. Support is Mandatory.
+     */
+    MPEG2_LC = 1,
+    /**
+     * MPEG-4 Low Complexity. Support is Optional.
+     */
+    MPEG4_LC = 1 << 1,
+    /**
+     * MPEG-4 Long Term Prediction. Support is Optional.
+     */
+    MPEG4_LTP = 1 << 2,
+    /**
+     * MPEG-4 Scalable. Support is Optional.
+     */
+    MPEG4_SCALABLE = 1 << 3,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AptxCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AptxCapabilities.aidl
new file mode 100644
index 0000000..6a37fc6
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AptxCapabilities.aidl
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.ChannelMode;
+
+/**
+ * Used for Hardware Encoding AptX and AptX-HD codec capabilities
+ */
+@VintfStability
+parcelable AptxCapabilities {
+    int[] sampleRateHz;
+    /* bitfield */
+    ChannelMode channelMode;
+    byte[] bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AptxConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AptxConfiguration.aidl
new file mode 100644
index 0000000..83b7b0c
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AptxConfiguration.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.ChannelMode;
+
+/**
+ * Used for Hardware Encoding AptX and AptX-HD codec configuration
+ */
+@VintfStability
+parcelable AptxConfiguration {
+    int sampleRateHz;
+    ChannelMode channelMode;
+    byte bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioCapabilities.aidl
new file mode 100644
index 0000000..6ed4472
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioCapabilities.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.CodecCapabilities;
+import android.hardware.bluetooth.audio.LeAudioCapabilities;
+import android.hardware.bluetooth.audio.PcmCapabilities;
+
+/**
+ * Used to specify the capabilities of the different session types
+ */
+@VintfStability
+union AudioCapabilities {
+    PcmCapabilities pcmCapabilities;
+    CodecCapabilities codecCapabilities;
+    LeAudioCapabilities leAudioCapabilities;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioConfiguration.aidl
new file mode 100644
index 0000000..ce515b5
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioConfiguration.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.CodecConfiguration;
+import android.hardware.bluetooth.audio.LeAudioConfiguration;
+import android.hardware.bluetooth.audio.PcmConfiguration;
+
+/**
+ * Used to configure either a Hardware or Software Encoding session based on session type
+ */
+@VintfStability
+union AudioConfiguration {
+    PcmConfiguration pcmConfig;
+    CodecConfiguration codecConfig;
+    LeAudioConfiguration leAudioConfig;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioLocation.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioLocation.aidl
new file mode 100644
index 0000000..dedfbf9
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/AudioLocation.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="int")
+enum AudioLocation {
+    UNKNOWN = 1,
+    FRONT_LEFT = 1 << 1,
+    FRONT_RIGHT = 1 << 2,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/BluetoothAudioStatus.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/BluetoothAudioStatus.aidl
new file mode 100644
index 0000000..ec78445
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/BluetoothAudioStatus.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="int")
+enum BluetoothAudioStatus {
+    UNKNOWN = 0,
+    SUCCESS = 1,
+    UNSUPPORTED_CODEC_CONFIGURATION = 2,
+    // General failure
+    FAILURE = 3
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/BroadcastConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/BroadcastConfiguration.aidl
new file mode 100644
index 0000000..07d05f1
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/BroadcastConfiguration.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.LeAudioCodecConfiguration;
+
+@VintfStability
+parcelable BroadcastConfiguration {
+    @VintfStability
+    parcelable BroadcastStreamMap {
+        /*
+         * The connection handle used for a unicast or a broadcast group.
+         * Range: 0x0000 to 0xEFFF
+         */
+        char streamHandle;
+        /*
+         * Audio channel allocation is  a bit field, each enabled bit means that given audio
+         * direction, i.e. "left", or "right" is used. Ordering of audio channels comes from the
+         * least significant bit to the most significant bit.
+         */
+        int audioChannelAllocation;
+        LeAudioCodecConfiguration leAudioCondecConfig;
+    }
+    BroadcastStreamMap[] streamMap;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/ChannelMode.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/ChannelMode.aidl
new file mode 100644
index 0000000..2df879d
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/ChannelMode.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="byte")
+enum ChannelMode {
+    UNKNOWN = 1,
+    MONO = 1 << 1,
+    STEREO = 1 << 2,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecCapabilities.aidl
new file mode 100644
index 0000000..0eee8cb
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecCapabilities.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.AacCapabilities;
+import android.hardware.bluetooth.audio.AptxCapabilities;
+import android.hardware.bluetooth.audio.CodecType;
+import android.hardware.bluetooth.audio.LdacCapabilities;
+import android.hardware.bluetooth.audio.SbcCapabilities;
+
+/**
+ * Used to specify the capabilities of the codecs supported by Hardware Encoding.
+ * AptX and AptX-HD both use the AptxCapabilities field.
+ */
+@VintfStability
+parcelable CodecCapabilities {
+    @VintfStability
+    union Capabilities {
+        SbcCapabilities sbcCapabilities;
+        AacCapabilities aacCapabilities;
+        LdacCapabilities ldacCapabilities;
+        AptxCapabilities aptxCapabilities;
+    }
+    CodecType codecType;
+    Capabilities capabilities;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecConfiguration.aidl
new file mode 100644
index 0000000..fac90f0
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecConfiguration.aidl
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.AacConfiguration;
+import android.hardware.bluetooth.audio.AptxConfiguration;
+import android.hardware.bluetooth.audio.CodecType;
+import android.hardware.bluetooth.audio.LdacConfiguration;
+import android.hardware.bluetooth.audio.SbcConfiguration;
+
+/**
+ * Used to configure a Hardware Encoding session.
+ * AptX and AptX-HD both use the AptxConfiguration field.
+ */
+@VintfStability
+parcelable CodecConfiguration {
+    @VintfStability
+    union CodecSpecific {
+        SbcConfiguration sbcConfig;
+        AacConfiguration aacConfig;
+        LdacConfiguration ldacConfig;
+        AptxConfiguration aptxConfig;
+    }
+    CodecType codecType;
+    /**
+     * The encoded audio bitrate in bits / second.
+     * 0x00000000 - The audio bitrate is not specified / unused
+     * 0x00000001 - 0x00FFFFFF - Encoded audio bitrate in bits/second
+     * 0x01000000 - 0xFFFFFFFF - Reserved
+     *
+     * The HAL needs to support all legal bitrates for the selected codec.
+     */
+    int encodedAudioBitrate;
+    /**
+     * Peer MTU (in two-octets)
+     */
+    int peerMtu;
+    /**
+     * Content protection by SCMS-T
+     */
+    boolean isScmstEnabled;
+    CodecSpecific config;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecType.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecType.aidl
new file mode 100644
index 0000000..68c60f5
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/CodecType.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="int")
+enum CodecType {
+    UNKNOWN,
+    SBC,
+    AAC,
+    APTX,
+    APTX_HD,
+    LDAC,
+    LC3,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioPort.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioPort.aidl
new file mode 100644
index 0000000..50e3197
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioPort.aidl
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.audio.common.SourceMetadata;
+import android.hardware.bluetooth.audio.PresentationPosition;
+
+/**
+ * HAL interface from the Audio HAL to the Bluetooth stack
+ *
+ * The Audio HAL calls methods in this interface to start, suspend, and stop
+ * an audio stream. These calls return immediately and the results, if any,
+ * are sent over the IBluetoothAudioProvider interface.
+ *
+ * Moreover, the Audio HAL can also get the presentation position of the stream
+ * and provide stream metadata.
+ *
+ */
+@VintfStability
+interface IBluetoothAudioPort {
+    /**
+     * Get the audio presentation position.
+     *
+     * @return the audio presentation position
+     *
+     */
+    PresentationPosition getPresentationPosition();
+
+    /**
+     * This indicates that the caller of this method has opened the data path
+     * and wants to start an audio stream. The caller must wait for a
+     * IBluetoothAudioProvider.streamStarted(Status) call.
+     */
+    void startStream();
+
+    /**
+     * This indicates that the caller of this method wants to stop the audio
+     * stream. The data path will be closed after this call. There is no
+     * callback from the IBluetoothAudioProvider interface even though the
+     * teardown is asynchronous.
+     */
+    void stopStream();
+
+    /**
+     * This indicates that the caller of this method wants to suspend the audio
+     * stream. The caller must wait for the Bluetooth process to call
+     * IBluetoothAudioProvider.streamSuspended(Status). The caller still keeps
+     * the data path open.
+     */
+    void suspendStream();
+
+    /**
+     * Called when the metadata of the stream's source has been changed.
+     *
+     * @param sourceMetadata Description of the audio that is played by the
+     *    clients.
+     */
+    void updateMetadata(in SourceMetadata sourceMetadata);
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioProvider.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioProvider.aidl
new file mode 100644
index 0000000..a2c5ae9
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioProvider.aidl
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.AudioConfiguration;
+import android.hardware.bluetooth.audio.BluetoothAudioStatus;
+import android.hardware.bluetooth.audio.IBluetoothAudioPort;
+import android.hardware.common.fmq.MQDescriptor;
+import android.hardware.common.fmq.SynchronizedReadWrite;
+
+/**
+ * HAL interface from the Bluetooth stack to the Audio HAL
+ *
+ * The Bluetooth stack calls methods in this interface to start and end audio
+ * sessions and sends callback events to the Audio HAL.
+ *
+ */
+@VintfStability
+interface IBluetoothAudioProvider {
+    /**
+     * Ends the current session and unregisters the IBluetoothAudioPort
+     * interface.
+     */
+    void endSession();
+
+    /**
+     * This method indicates that the Bluetooth stack is ready to stream audio.
+     * It registers an instance of IBluetoothAudioPort with and provides the
+     * current negotiated codec to the Audio HAL. After this method is called,
+     * the Audio HAL can invoke IBluetoothAudioPort.startStream().
+     *
+     * Note: endSession() must be called to unregister this IBluetoothAudioPort
+     *
+     * @param hostIf An instance of IBluetoothAudioPort for stream control
+     * @param audioConfig The audio configuration negotiated with the remote
+     *    device. The PCM parameters are set if software based encoding,
+     *    otherwise the correct codec configuration is used for hardware
+     *    encoding.
+     *
+     * @return The fast message queue for audio data from/to this
+     *    provider. Audio data will be in PCM format as specified by the
+     *    audioConfig.pcmConfig parameter. Invalid if streaming is offloaded
+     *    from/to hardware or on failure
+     */
+    MQDescriptor<byte, SynchronizedReadWrite> startSession(
+            in IBluetoothAudioPort hostIf, in AudioConfiguration audioConfig);
+
+    /**
+     * Callback for IBluetoothAudioPort.startStream()
+     *
+     * @param status true for SUCCESS or false for FAILURE
+     */
+    void streamStarted(in BluetoothAudioStatus status);
+
+    /**
+     * Callback for IBluetoothAudioPort.suspendStream()
+     *
+     * @param status true for SUCCESS or false for FAILURE
+     */
+    void streamSuspended(in BluetoothAudioStatus status);
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioProviderFactory.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioProviderFactory.aidl
new file mode 100644
index 0000000..3cde22c
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/IBluetoothAudioProviderFactory.aidl
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.AudioCapabilities;
+import android.hardware.bluetooth.audio.IBluetoothAudioProvider;
+import android.hardware.bluetooth.audio.SessionType;
+/**
+ * This factory allows a HAL implementation to be split into multiple
+ * independent providers.
+ *
+ * When the Bluetooth stack is ready to create an audio session, it must first
+ * obtain the IBluetoothAudioProvider for that session type by calling
+ * openProvider().
+ *
+ */
+
+@VintfStability
+interface IBluetoothAudioProviderFactory {
+    /**
+     * Gets a list of audio capabilities for a session type.
+     *
+     * For software encoding, the PCM capabilities are returned.
+     * For hardware encoding, the supported codecs and their capabilities are
+     * returned.
+     *
+     * @param sessionType The session type (e.g.
+     *    A2DP_SOFTWARE_ENCODING_DATAPATH).
+     * @return A list containing all the capabilities
+     *    supported by the sesson type. The capabilities is a list of
+     *    available options when configuring the codec for the session.
+     *    For software encoding it is the PCM data rate.
+     *    For hardware encoding it is the list of supported codecs and their
+     *    capabilities.
+     *    If a provider isn't supported, an empty list should be returned.
+     *    Note: Only one entry should exist per codec when using hardware
+     *    encoding.
+     */
+    AudioCapabilities[] getProviderCapabilities(in SessionType sessionType);
+
+    /**
+     * Opens an audio provider for a session type. To close the provider, it is
+     * necessary to release references to the returned provider object.
+     *
+     * @param sessionType The session type (e.g.
+     *    LE_AUDIO_SOFTWARE_ENCODING_DATAPATH).
+     *
+     * @return provider The provider of the specified session type
+     */
+    IBluetoothAudioProvider openProvider(in SessionType sessionType);
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/Lc3Capabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/Lc3Capabilities.aidl
new file mode 100644
index 0000000..1aedefd
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/Lc3Capabilities.aidl
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+/**
+ * Used for Hardware Encoding/Decoding LC3 codec capabilities.
+ */
+@VintfStability
+parcelable Lc3Capabilities {
+    /*
+     * PCM is Input for encoder, Output for decoder
+     */
+    byte[] pcmBitDepth;
+    /*
+     * codec-specific parameters
+     */
+    int[] samplingFrequencyHz;
+    /*
+     * FrameDuration based on microseconds.
+     */
+    int[] frameDurationUs;
+    /*
+     * length in octets of a codec frame
+     */
+    int[] octetsPerFrame;
+    /*
+     * Number of blocks of codec frames per single SDU (Service Data Unit)
+     */
+    byte[] blocksPerSdu;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/Lc3Configuration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/Lc3Configuration.aidl
new file mode 100644
index 0000000..77c04c1
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/Lc3Configuration.aidl
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+/**
+ * Used for Hardware Encoding/Decoding LC3 codec configuration.
+ */
+@VintfStability
+parcelable Lc3Configuration {
+    /*
+     * PCM is Input for encoder, Output for decoder
+     */
+    byte pcmBitDepth;
+    /*
+     * codec-specific parameters
+     */
+    int samplingFrequencyHz;
+    /*
+     * FrameDuration based on microseconds.
+     */
+    int frameDurationUs;
+    /*
+     * length in octets of a codec frame
+     */
+    int octetsPerFrame;
+    /*
+     * Number of blocks of codec frames per single SDU (Service Data Unit)
+     */
+    byte blocksPerSdu;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacCapabilities.aidl
new file mode 100644
index 0000000..44cca7e
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacCapabilities.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.LdacChannelMode;
+import android.hardware.bluetooth.audio.LdacQualityIndex;
+
+/**
+ * Used for Hardware Encoding LDAC codec capabilities
+ * all qualities must be supported.
+ */
+@VintfStability
+parcelable LdacCapabilities {
+    int[] sampleRateHz;
+    /* bitfiled */
+    LdacChannelMode channelMode;
+    /* bitfiled */
+    LdacQualityIndex qualityIndex;
+    byte[] bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacChannelMode.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacChannelMode.aidl
new file mode 100644
index 0000000..3acca32
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacChannelMode.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+/**
+ * Channel Mode: 3 bits
+ */
+@VintfStability
+@Backing(type="byte")
+enum LdacChannelMode {
+    UNKNOWN = 1,
+    STEREO = 1 << 1,
+    DUAL = 1 << 2,
+    MONO = 1 << 3,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacConfiguration.aidl
new file mode 100644
index 0000000..cc03dd0
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacConfiguration.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.LdacChannelMode;
+import android.hardware.bluetooth.audio.LdacQualityIndex;
+
+/**
+ * Used for Hardware Encoding LDAC codec configuration
+ * Only used when configuring the codec.
+ */
+@VintfStability
+parcelable LdacConfiguration {
+    int sampleRateHz;
+    LdacChannelMode channelMode;
+    LdacQualityIndex qualityIndex;
+    byte bitsPerSample;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacQualityIndex.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacQualityIndex.aidl
new file mode 100644
index 0000000..cb12583
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LdacQualityIndex.aidl
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="byte")
+enum LdacQualityIndex {
+    /**
+     * 990kbps
+     */
+    HIGH = 1,
+    /**
+     * 660kbps
+     */
+    MID = 1 << 1,
+    /**
+     * 330kbps
+     */
+    LOW = 1 << 2,
+    /**
+     * Adaptive Bit Rate mode
+     */
+    ABR = 1 << 3,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioCapabilities.aidl
new file mode 100644
index 0000000..732427f
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioCapabilities.aidl
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.AudioLocation;
+import android.hardware.bluetooth.audio.CodecType;
+import android.hardware.bluetooth.audio.Lc3Capabilities;
+import android.hardware.bluetooth.audio.LeAudioMode;
+
+/**
+ * Used to specify the capabilities of the LC3 codecs supported by Hardware Encoding.
+ */
+@VintfStability
+parcelable LeAudioCapabilities {
+    @VintfStability
+    parcelable VendorCapabilities {
+        ParcelableHolder extension;
+    }
+    @VintfStability
+    union LeAudioCodecCapabilities {
+        Lc3Capabilities lc3Capabilities;
+        VendorCapabilities vendorCapabillities;
+    }
+    LeAudioMode mode;
+    CodecType codecType;
+    /*
+     * This is bitfield, if bit N is set, HW Offloader supports N+1 channels at the same time.
+     * Example: 0x27 = 0b00100111: One, two, three or six channels supported.
+     */
+    AudioLocation supportedChannel;
+    int supportedChannelCount;
+    LeAudioCodecCapabilities leAudioCodecCapabilities;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioCodecConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioCodecConfiguration.aidl
new file mode 100644
index 0000000..421eeb2
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioCodecConfiguration.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.Lc3Configuration;
+
+@VintfStability
+union LeAudioCodecConfiguration {
+    @VintfStability
+    parcelable VendorConfiguration {
+        ParcelableHolder extension;
+    }
+    Lc3Configuration lc3Config;
+    VendorConfiguration vendorConfig;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioConfiguration.aidl
new file mode 100644
index 0000000..515794b
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioConfiguration.aidl
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.BroadcastConfiguration;
+import android.hardware.bluetooth.audio.CodecType;
+import android.hardware.bluetooth.audio.LeAudioMode;
+import android.hardware.bluetooth.audio.UnicastConfiguration;
+
+@VintfStability
+parcelable LeAudioConfiguration {
+    @VintfStability
+    union LeAudioModeConfig {
+        UnicastConfiguration unicastConfig;
+        BroadcastConfiguration broadcastConfig;
+    }
+    /*
+     * The mode of the LE audio
+     */
+    LeAudioMode mode;
+    LeAudioModeConfig modeConfig;
+    CodecType codecType;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioMode.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioMode.aidl
new file mode 100644
index 0000000..2cf019e
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/LeAudioMode.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="byte")
+enum LeAudioMode {
+    UNKNOWN,
+    UNICAST,
+    BROADCAST,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PcmCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PcmCapabilities.aidl
new file mode 100644
index 0000000..f5d699e
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PcmCapabilities.aidl
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.ChannelMode;
+
+/**
+ * Used for Software Encoding audio feed capabilities
+ */
+@VintfStability
+parcelable PcmCapabilities {
+    int[] sampleRateHz;
+    ChannelMode channelMode;
+    byte[] bitsPerSample;
+    /**
+     * Data interval for data transfer
+     */
+    int[] dataIntervalUs;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PcmConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PcmConfiguration.aidl
new file mode 100644
index 0000000..03aa27b
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PcmConfiguration.aidl
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.ChannelMode;
+
+/**
+ * Used for Software Encoding audio feed configuration
+ */
+@VintfStability
+parcelable PcmConfiguration {
+    int sampleRateHz;
+    ChannelMode channelMode;
+    byte bitsPerSample;
+    /**
+     * Data interval for data transfer
+     */
+    int dataIntervalUs;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PresentationPosition.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PresentationPosition.aidl
new file mode 100644
index 0000000..f3b8aed
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/PresentationPosition.aidl
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+parcelable PresentationPosition {
+    @VintfStability
+    parcelable TimeSpec {
+        /**
+         * seconds
+         */
+        long tvSec;
+        /**
+         *  nanoseconds
+         */
+        long tvNSec;
+    }
+    /*
+     * remoteDeviceAudioDelayNanos the audio delay from when the remote
+     * device (e.g. headset) receives audio data to when the device plays the
+     * sound. If the delay is unknown, the value is set to zero.
+     */
+    long remoteDeviceAudioDelayNanos;
+    /*
+     * transmittedOctets the number of audio data octets that were sent
+     * to a remote device. This excludes octets that have been written to the
+     * data path but have not been sent to the remote device. The count is
+     * not reset until stopStream() is called. If the software data path is
+     * unused (e.g. Hardware Offload), the value is set to 0.
+     */
+    long transmittedOctets;
+    /*
+     * transmittedOctetsTimestamp the value of CLOCK_MONOTONIC
+     * corresponding to transmittedOctets. If the software data path is
+     * unused (e.g., for Hardware Offload), the value is set to zero.
+     */
+    TimeSpec transmittedOctetsTimestamp;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcAllocMethod.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcAllocMethod.aidl
new file mode 100644
index 0000000..7047e34
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcAllocMethod.aidl
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="byte")
+enum SbcAllocMethod {
+    /**
+     * SNR
+     */
+    ALLOC_MD_S = 1,
+    /**
+     * Loudness
+     */
+    ALLOC_MD_L = 1 << 1,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcCapabilities.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcCapabilities.aidl
new file mode 100644
index 0000000..cf62ed4
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcCapabilities.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.SbcAllocMethod;
+import android.hardware.bluetooth.audio.SbcChannelMode;
+
+/**
+ * Used for Hardware Encoding SBC codec capabilities.
+ */
+@VintfStability
+parcelable SbcCapabilities {
+    int[] sampleRateHz;
+    /* bitfield */
+    SbcChannelMode channelMode;
+    byte[] blockLength;
+    byte[] numSubbands;
+    /* bitfield */
+    SbcAllocMethod allocMethod;
+    byte[] bitsPerSample;
+    /*
+     * range from 2 to 250.
+     */
+    int minBitpool;
+    /*
+     * range from 2 to 250.
+     */
+    int maxBitpool;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcChannelMode.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcChannelMode.aidl
new file mode 100644
index 0000000..7eb38cd
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcChannelMode.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="byte")
+enum SbcChannelMode {
+    UNKNOWN = 1,
+    JOINT_STEREO = 1 << 1,
+    STEREO = 1 << 2,
+    DUAL = 1 << 3,
+    MONO = 1 << 4,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcConfiguration.aidl
new file mode 100644
index 0000000..054d03e
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SbcConfiguration.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.SbcAllocMethod;
+import android.hardware.bluetooth.audio.SbcChannelMode;
+
+/**
+ * Used for Hardware Encoding SBC codec configuration.
+ */
+@VintfStability
+parcelable SbcConfiguration {
+    int sampleRateHz;
+    SbcChannelMode channelMode;
+    byte blockLength;
+    byte numSubbands;
+    SbcAllocMethod allocMethod;
+    byte bitsPerSample;
+    /*
+     * range from 2 to 250.
+     */
+    int minBitpool;
+    /*
+     * range from 2 to 250.
+     */
+    int maxBitpool;
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SessionType.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SessionType.aidl
new file mode 100644
index 0000000..30faae3
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/SessionType.aidl
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+@VintfStability
+@Backing(type="byte")
+enum SessionType {
+    UNKNOWN,
+    /**
+     * A2DP legacy that AVDTP media is encoded by Bluetooth Stack
+     */
+    A2DP_SOFTWARE_ENCODING_DATAPATH,
+    /**
+     * The encoding of AVDTP media is done by HW and there is control only
+     */
+    A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH,
+    /**
+     * Used when encoded by Bluetooth Stack and streaming to Hearing Aid
+     */
+    HEARING_AID_SOFTWARE_ENCODING_DATAPATH,
+    /**
+     * Used when encoded by Bluetooth Stack and streaming to LE Audio device
+     */
+    LE_AUDIO_SOFTWARE_ENCODING_DATAPATH,
+    /**
+     * Used when decoded by Bluetooth Stack and streaming to audio framework
+     */
+    LE_AUDIO_SOFTWARE_DECODING_DATAPATH,
+    /**
+     * Encoding is done by HW an there is control only
+     */
+    LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH,
+    /**
+     * Decoding is done by HW an there is control only
+     */
+    LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH,
+}
diff --git a/bluetooth/audio/aidl/android/hardware/bluetooth/audio/UnicastConfiguration.aidl b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/UnicastConfiguration.aidl
new file mode 100644
index 0000000..7be2c5b
--- /dev/null
+++ b/bluetooth/audio/aidl/android/hardware/bluetooth/audio/UnicastConfiguration.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.bluetooth.audio;
+
+import android.hardware.bluetooth.audio.LeAudioCodecConfiguration;
+
+@VintfStability
+parcelable UnicastConfiguration {
+    @VintfStability
+    parcelable UnicastStreamMap {
+        /*
+         * The connection handle used for a unicast or a broadcast group.
+         * Range: 0x0000 to 0xEFFF
+         */
+        char streamHandle;
+        /*
+         * Audio channel allocation is  a bit field, each enabled bit means that given audio
+         * direction, i.e. "left", or "right" is used. Ordering of audio channels comes from the
+         * least significant bit to the most significant bit. The valus follows the Bluetooth SIG
+         * Audio Location assigned number.
+         */
+        int audioChannelAllocation;
+    }
+    UnicastStreamMap[] streamMap;
+    int peerDelay;
+    LeAudioCodecConfiguration leAudioCodecConfig;
+}