diff --git a/media/bufferpool/aidl/Android.bp b/media/bufferpool/aidl/Android.bp
new file mode 100644
index 0000000..3b2ea3c
--- /dev/null
+++ b/media/bufferpool/aidl/Android.bp
@@ -0,0 +1,35 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+aidl_interface {
+    name: "android.hardware.media.bufferpool2",
+    vendor_available: true,
+    srcs: ["android/hardware/media/bufferpool2/*.aidl"],
+    imports: [
+        "android.hardware.common-V2",
+        "android.hardware.common.fmq-V1",
+    ],
+    stability: "vintf",
+    backend: {
+        cpp: {
+            enabled: false,
+        },
+        java: {
+            enabled: false,
+        },
+        ndk: {
+            enabled: true,
+        },
+    },
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/Buffer.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/Buffer.aidl
new file mode 100644
index 0000000..4ea0bba
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/Buffer.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@VintfStability
+parcelable Buffer {
+  int id;
+  android.hardware.common.NativeHandle buffer;
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferInvalidationMessage.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferInvalidationMessage.aidl
new file mode 100644
index 0000000..181286c
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferInvalidationMessage.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@FixedSize @VintfStability
+parcelable BufferInvalidationMessage {
+  int messageId;
+  int fromBufferId;
+  int toBufferId;
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferStatus.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferStatus.aidl
new file mode 100644
index 0000000..13174ff
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferStatus.aidl
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@Backing(type="int") @VintfStability
+enum BufferStatus {
+  NOT_USED = 0,
+  USED = 1,
+  TRANSFER_TO = 2,
+  TRANSFER_FROM = 3,
+  TRANSFER_TIMEOUT = 4,
+  TRANSFER_LOST = 5,
+  TRANSFER_FETCH = 6,
+  TRANSFER_OK = 7,
+  TRANSFER_ERROR = 8,
+  INVALIDATION_ACK = 9,
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferStatusMessage.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferStatusMessage.aidl
new file mode 100644
index 0000000..7e79a36
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/BufferStatusMessage.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@FixedSize @VintfStability
+parcelable BufferStatusMessage {
+  long transactionId;
+  int bufferId;
+  android.hardware.media.bufferpool2.BufferStatus status;
+  long connectionId;
+  long targetConnectionId;
+  long timestampUs;
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IAccessor.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IAccessor.aidl
new file mode 100644
index 0000000..4053797
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IAccessor.aidl
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@VintfStability
+interface IAccessor {
+  android.hardware.media.bufferpool2.IAccessor.ConnectionInfo connect(in android.hardware.media.bufferpool2.IObserver observer);
+  @VintfStability
+  parcelable ConnectionInfo {
+    android.hardware.media.bufferpool2.IConnection connection;
+    long connectionId;
+    int msgId;
+    android.hardware.common.fmq.MQDescriptor<android.hardware.media.bufferpool2.BufferStatusMessage,android.hardware.common.fmq.SynchronizedReadWrite> toFmqDesc;
+    android.hardware.common.fmq.MQDescriptor<android.hardware.media.bufferpool2.BufferInvalidationMessage,android.hardware.common.fmq.UnsynchronizedWrite> fromFmqDesc;
+  }
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IClientManager.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IClientManager.aidl
new file mode 100644
index 0000000..54896d4
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IClientManager.aidl
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@VintfStability
+interface IClientManager {
+  long registerSender(in android.hardware.media.bufferpool2.IAccessor bufferPool);
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IConnection.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IConnection.aidl
new file mode 100644
index 0000000..300fcba
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IConnection.aidl
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@VintfStability
+interface IConnection {
+  android.hardware.media.bufferpool2.IConnection.FetchResult[] fetch(in android.hardware.media.bufferpool2.IConnection.FetchInfo[] fetchInfos);
+  parcelable FetchInfo {
+    long transactionId;
+    int bufferId;
+  }
+  union FetchResult {
+    android.hardware.media.bufferpool2.Buffer buffer;
+    android.hardware.media.bufferpool2.ResultStatus failure;
+  }
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IObserver.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IObserver.aidl
new file mode 100644
index 0000000..2d8cffe
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/IObserver.aidl
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@VintfStability
+interface IObserver {
+  oneway void onMessage(in long connectionId, in int msgId);
+}
diff --git a/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/ResultStatus.aidl b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/ResultStatus.aidl
new file mode 100644
index 0000000..7370998
--- /dev/null
+++ b/media/bufferpool/aidl/aidl_api/android.hardware.media.bufferpool2/current/android/hardware/media/bufferpool2/ResultStatus.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// 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.media.bufferpool2;
+@VintfStability
+parcelable ResultStatus {
+  int resultStatus;
+  const int OK = 0;
+  const int NO_MEMORY = 1;
+  const int ALREADY_EXISTS = 2;
+  const int NOT_FOUND = 3;
+  const int CRITICAL_ERROR = 4;
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/Buffer.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/Buffer.aidl
new file mode 100644
index 0000000..976f674
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/Buffer.aidl
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+import android.hardware.common.NativeHandle;
+
+/**
+ * Generic buffer for fast recycling for media/stagefright.
+ *
+ * During media pipeline buffer references are created, shared and
+ * destroyed frequently. The underlying buffers are allocated on demand
+ * by a buffer pool, and are recycled to the buffer pool when they are
+ * no longer referenced by the clients.
+ *
+ * E.g. ion or gralloc buffer
+ */
+@VintfStability
+parcelable Buffer {
+    int id;
+    NativeHandle buffer;
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferInvalidationMessage.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferInvalidationMessage.aidl
new file mode 100644
index 0000000..ad03cd5
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferInvalidationMessage.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+/*
+ * Buffer pool sends a buffer invalidation message to clients in order to
+ * ensure fast reclamation of the buffers. Buffer pool implementation on
+ * clients must release the invalidated buffers right away after finishing
+ * the use of buffers upon receiving a buffer invalidation message.
+ * Users cannot delay or control timing of the handling/reception of
+ * invalidation messages. Buffer pool implementation must guarantee timely
+ * handling of invalidation messages.
+ */
+@VintfStability
+@FixedSize
+parcelable BufferInvalidationMessage {
+    int messageId;
+    /**
+     * Buffers from fromBufferId to toBufferId must be invalidated.
+     * fromBufferId is inclusive, but toBufferId is not inclusive.
+     * If fromBufferId > toBufferID, wrap happens. In that case
+     * the wrap is based on UINT32_MAX.
+     */
+    int fromBufferId;
+    int toBufferId;
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferStatus.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferStatus.aidl
new file mode 100644
index 0000000..b63aee2
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferStatus.aidl
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+/**
+ * Buffer ownership status for the specified client.
+ * Buffer transfer status for the specified buffer transafer transaction.
+ * BufferStatus is posted along with BufferStatusMessage from a client to
+ * the buffer pool for synchronization after status change.
+ */
+@VintfStability
+@Backing(type="int")
+enum BufferStatus {
+    /**
+     * No longer used by the specified client.
+     */
+    NOT_USED = 0,
+    /**
+     * Buffer is acquired by the specified client.
+     */
+    USED = 1,
+    /**
+     * Buffer is sent by the specified client.
+     */
+    TRANSFER_TO = 2,
+    /**
+     * Buffer transfer is acked by the receiver client.
+     */
+    TRANSFER_FROM = 3,
+    /**
+     * Buffer transfer is timed out by receiver client.
+     */
+    TRANSFER_TIMEOUT = 4,
+    /**
+     * Buffer transfer is not acked by the receiver.
+     */
+    TRANSFER_LOST = 5,
+    /**
+     * Buffer fetch request from the client.
+     */
+    TRANSFER_FETCH = 6,
+    /**
+     * Buffer transaction succeeded.
+     */
+    TRANSFER_OK = 7,
+    /**
+     * Buffer transaction failure.
+     */
+    TRANSFER_ERROR = 8,
+    /**
+     * Buffer invalidation ack.
+     */
+    INVALIDATION_ACK = 9,
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferStatusMessage.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferStatusMessage.aidl
new file mode 100644
index 0000000..e3fd8f0
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/BufferStatusMessage.aidl
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+import android.hardware.media.bufferpool2.BufferStatus;
+
+/**
+ * Buffer ownership status change message. This message is
+ * sent via fmq to the buffer pool from client processes.
+ */
+@VintfStability
+@FixedSize
+parcelable BufferStatusMessage {
+    /**
+     * Transaction Id = (SenderId : sender local transaction Id)
+     * Transaction Id is created from sender and posted via fmq within
+     * TRANSFER_TO message.
+     */
+    long transactionId;
+    int bufferId;
+    BufferStatus status;
+    /**
+     * Used by the buffer pool, not by client.
+     */
+    long connectionId;
+    /**
+     * Valid only when TRANSFER_TO is posted.
+     */
+    long targetConnectionId;
+    /**
+     * Used by the buffer pool, not by client.
+     * Monotonic timestamp in Us since fixed point in time as decided
+     * by the sender of the message
+     */
+    long timestampUs;
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/IAccessor.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IAccessor.aidl
new file mode 100644
index 0000000..0fa5961
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IAccessor.aidl
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+import android.hardware.common.fmq.MQDescriptor;
+import android.hardware.common.fmq.SynchronizedReadWrite;
+import android.hardware.common.fmq.UnsynchronizedWrite;
+
+
+import android.hardware.media.bufferpool2.BufferInvalidationMessage;
+import android.hardware.media.bufferpool2.BufferStatusMessage;
+import android.hardware.media.bufferpool2.IConnection;
+import android.hardware.media.bufferpool2.IObserver;
+
+/**
+ * IAccessor creates IConnection which is used from IClientManager in order to
+ * use functionality of the specified buffer pool.
+ */
+@VintfStability
+interface IAccessor {
+    @VintfStability
+     /**
+     * Connection information between the bufferpool process and the receiver
+     * process. The information is used from the receiver process in order to
+     * receive buffers from the bufferpool process.
+     */
+    parcelable ConnectionInfo {
+        /**
+        * The interface to get shared buffers from the bufferpool.
+        */
+        IConnection connection;
+        /**
+         * The identifier for a (sender/receiver) pair during buffer transfer.
+         * This is system wide unique.
+         */
+        long connectionId;
+        /**
+         * Id of the most recent message from bufferpool. This is monotonic.
+         */
+        int msgId;
+        /**
+         * The FMQ descriptor for sending buffer status messages back to bufferpool
+         */
+        MQDescriptor<BufferStatusMessage, SynchronizedReadWrite> toFmqDesc;
+        /**
+         * The FMQ descriptor for receiving buffer invalidation messages from bufferpool
+         */
+        MQDescriptor<BufferInvalidationMessage, UnsynchronizedWrite> fromFmqDesc;
+    }
+
+    /**
+     * Registers a new client and creates IConnection to the buffer pool for
+     * the client. IConnection and FMQ are used by IClientManager in order to
+     * communicate with the buffer pool. Via FMQ IClientManager sends
+     * BufferStatusMessage(s) to the buffer pool.
+     *
+     * FMQ is used to send buffer ownership status changes to a buffer pool
+     * from a buffer pool client. A buffer pool synchronizes FMQ messages when
+     * there is an aidl request from the clients. Every client has its own
+     * connection and FMQ to communicate with the buffer pool. So sending an
+     * FMQ message on behalf of other clients is not possible.
+     *
+     * FMQ messages are sent when a buffer is acquired or released. Also, FMQ
+     * messages are sent when a buffer is transferred from a client to another
+     * client. FMQ has its own ID from a buffer pool. A client is specified
+     * with the ID.
+     *
+     * To transfer a buffer, a sender must send an FMQ message. The message
+     * must include a receiver's ID and a transaction ID. A receiver must send
+     * the transaction ID to fetch a buffer from a buffer pool. Since the
+     * sender already registered the receiver via an FMQ message, The buffer
+     * pool must verify the receiver with the transaction ID. In order to
+     * prevent faking a receiver, a connection to a buffer pool from client is
+     * made and kept private. Also part of transaction ID is a sender ID in
+     * order to prevent fake transactions from other clients. This must be
+     * verified with an FMQ message from a buffer pool.
+     *
+     * @param observer The buffer pool event observer from the client.
+     *     Observer is provided to ensure FMQ messages are processed even when
+     *     client processes are idle. Buffer invalidation caused by
+     *     reconfiguration does not call observer. Buffer invalidation caused
+     *     by termination of pipeline call observer in order to ensure
+     *     invalidation is done after pipeline completion.
+     * @return ConnectionInfo The information regarding the established
+     *     connection
+     * @@throws ServiceSpecificException with one of the following values:
+     *     ResultStatus::NO_MEMORY        - Memory allocation failure occurred.
+     *     ResultStatus::ALREADY_EXISTS   - A connection was already made.
+     *     ResultStatus::CRITICAL_ERROR   - Other errors.
+     */
+    ConnectionInfo connect(in IObserver observer);
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/IClientManager.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IClientManager.aidl
new file mode 100644
index 0000000..bf36e25
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IClientManager.aidl
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+import android.hardware.media.bufferpool2.IAccessor;
+
+/**
+ * IClientManager manages IConnection(s) inside a process. A locally
+ * created IConnection represents a communication node(receiver) with the
+ * specified buffer pool(IAccessor).
+ * IConnection(s) are not exposed to other processes(IClientManager).
+ * IClientManager instance must be unique within a process.
+ */
+@VintfStability
+interface IClientManager {
+    /**
+     * Sets up a buffer receiving communication node for the specified
+     * buffer pool. A manager must create a IConnection to the buffer
+     * pool if it does not already have a connection.
+     *
+     * @param bufferPool a buffer pool which is specified with the IAccessor.
+     *     The specified buffer pool is the owner of received buffers.
+     * @return the Id of the communication node to the buffer pool.
+     *     This id is used in FMQ to notify IAccessor that a buffer has been
+     *     sent to that connection during transfers.
+     * @throws ServiceSpecificException with one of the following values:
+     *     ResultStatus::NO_MEMORY        - Memory allocation failure occurred.
+     *     ResultStatus::ALREADY_EXISTS   - A sender was registered already.
+     *     ResultStatus::CRITICAL_ERROR   - Other errors.
+     */
+    long registerSender(in IAccessor bufferPool);
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/IConnection.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IConnection.aidl
new file mode 100644
index 0000000..d869f47
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IConnection.aidl
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+import android.hardware.media.bufferpool2.Buffer;
+import android.hardware.media.bufferpool2.ResultStatus;
+
+/**
+ * A connection to a buffer pool which handles requests from a buffer pool
+ * client. The connection must be made in order to receive buffers from
+ * other buffer pool clients.
+ */
+@VintfStability
+interface IConnection {
+
+    parcelable FetchInfo {
+        /**
+         * Unique transaction id for buffer transferring.
+         */
+        long transactionId;
+        /**
+         * Id of the buffer to be fetched.
+         */
+        int bufferId;
+    }
+
+    union FetchResult {
+        /**
+         * The fetched buffer on successful fetch.
+         */
+        Buffer buffer;
+        /**
+         * The reason of the request failure. Possible values are below.
+         *
+         * ResultStatus::NOT_FOUND        - A buffer was not found due to invalidation.
+         * ResultStatus::CRITICAL_ERROR   - Other errors.
+         */
+        ResultStatus failure;
+    }
+
+    /**
+     * Retrieves buffers using an array of FetchInfo.
+     * Each element of FetchInfo array contains a bufferId and a transactionId
+     * for each buffer to fetch. The method must be called from receiving side of buffers
+     * during transferring only when the specified buffer is neither cached nor used.
+     *
+     * The method could have partial failures, in the case other successfully fetched buffers
+     * will be in returned result along with the failures. The order of the returned result
+     * will be the same with the fetchInfos.
+     *
+     * @param fetchInfos information of buffers to fetch
+     * @return Requested buffers.
+     *         If there are failures, reasons of failures are also included.
+     * @throws ServiceSpecificException with one of the following values:
+     *     ResultStatus::NO_MEMORY        - Memory allocation failure occurred.
+     *     ResultStatus::CRITICAL_ERROR   - Other errors.
+     */
+    FetchResult[] fetch(in FetchInfo[] fetchInfos);
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/IObserver.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IObserver.aidl
new file mode 100644
index 0000000..07d1c3e
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/IObserver.aidl
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+/**
+ * IObserver listens on notifications from the buffer pool. On receiving
+ * notifications, FMQ messages from the specific buffer pool which are already
+ * in the FMQ are processed.
+ */
+@VintfStability
+interface IObserver {
+    /**
+     * The specific buffer pool sent a message to the client. Calling this
+     * method from the buffer pool enforces a buffer pool client process the
+     * message.
+     *
+     * @param connectionId the connection Id of the specific buffer pool client
+     * @param msgId Id of the most recent message
+     */
+    oneway void onMessage(in long connectionId, in int msgId);
+}
diff --git a/media/bufferpool/aidl/android/hardware/media/bufferpool2/ResultStatus.aidl b/media/bufferpool/aidl/android/hardware/media/bufferpool2/ResultStatus.aidl
new file mode 100644
index 0000000..162f9a7
--- /dev/null
+++ b/media/bufferpool/aidl/android/hardware/media/bufferpool2/ResultStatus.aidl
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.media.bufferpool2;
+
+@VintfStability
+parcelable ResultStatus {
+    const int OK = 0;
+    const int NO_MEMORY = 1;
+    const int ALREADY_EXISTS = 2;
+    const int NOT_FOUND = 3;
+    const int CRITICAL_ERROR = 4;
+
+    int resultStatus;
+}