| /* |
| * Copyright 2016 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef CAMERA_COMMON_UTILS_CROS_CAMERA_MOJO_UTILS_H_ |
| #define CAMERA_COMMON_UTILS_CROS_CAMERA_MOJO_UTILS_H_ |
| |
| #include <map> |
| #include <memory> |
| #include <unordered_map> |
| #include <utility> |
| |
| #include <hardware/camera3.h> |
| |
| #include <base/bind.h> |
| #include <base/bind_helpers.h> |
| #include <base/single_thread_task_runner.h> |
| #include <base/synchronization/lock.h> |
| #include <mojo/public/cpp/bindings/binding.h> |
| |
| #include "common/utils/common_types.h" |
| #include "cros-camera/common.h" |
| #include "cros-camera/future.h" |
| #include "mojo/camera3.mojom.h" |
| |
| namespace cros { |
| namespace internal { |
| |
| // Serialize / deserialize helper functions. |
| |
| // SerializeStreamBuffer is used in CameraDeviceAdapter::ProcessCaptureResult to |
| // pass a result buffer handle through Mojo. For the input / output buffers, we |
| // do not need to serialize the whole native handle but instead we can simply |
| // return their corresponding handle IDs. When the receiver gets the result it |
| // will restore using the handle ID the original buffer handles which were |
| // passed down when the frameworks called process_capture_request. |
| cros::mojom::Camera3StreamBufferPtr SerializeStreamBuffer( |
| const camera3_stream_buffer_t* buffer, |
| const ScopedStreams& streams, |
| const std::unordered_map<uint64_t, std::unique_ptr<camera_buffer_handle_t>>& |
| buffer_handles); |
| |
| int DeserializeStreamBuffer( |
| const cros::mojom::Camera3StreamBufferPtr& ptr, |
| const ScopedStreams& streams, |
| const std::unordered_map<uint64_t, std::unique_ptr<camera_buffer_handle_t>>& |
| buffer_handles, |
| camera3_stream_buffer_t* buffer); |
| |
| cros::mojom::CameraMetadataPtr SerializeCameraMetadata( |
| const camera_metadata_t* metadata); |
| |
| ScopedCameraMetadata DeserializeCameraMetadata( |
| const cros::mojom::CameraMetadataPtr& metadata); |
| // Template classes for Mojo IPC delegates |
| |
| // A wrapper around a mojo::InterfacePtr<T>. This template class represents a |
| // Mojo communication channel to a remote Mojo binding implementation of T. |
| template <typename InterfacePtrType> |
| class MojoChannelBase |
| : public base::SupportsWeakPtr<MojoChannelBase<InterfacePtrType>> { |
| public: |
| using Self = MojoChannelBase<InterfacePtrType>; |
| explicit MojoChannelBase( |
| scoped_refptr<base::SingleThreadTaskRunner> task_runner) |
| : task_runner_(task_runner) { |
| VLOGF_ENTER(); |
| } |
| |
| void Bind(typename InterfacePtrType::PtrInfoType interface_ptr_info, |
| const base::Closure& connection_error_handler) { |
| VLOGF_ENTER(); |
| task_runner_->PostTask( |
| FROM_HERE, base::Bind(&Self::BindOnThread, base::AsWeakPtr(this), |
| base::Passed(&interface_ptr_info), |
| connection_error_handler)); |
| } |
| |
| ~MojoChannelBase() { |
| VLOGF_ENTER(); |
| // We need to wait for ResetInterfacePtrOnThread to finish before return |
| // otherwise it would cause race condition in destruction of |
| // |interface_ptr_| and may CHECK. |
| auto future = cros::Future<void>::Create(nullptr); |
| if (task_runner_->BelongsToCurrentThread()) { |
| ResetInterfacePtrOnThread(cros::GetFutureCallback(future)); |
| } else { |
| task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&Self::ResetInterfacePtrOnThread, base::AsWeakPtr(this), |
| cros::GetFutureCallback(future))); |
| } |
| future->Wait(); |
| } |
| |
| protected: |
| // All the Mojo communication happens on |task_runner_|. |
| const scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| |
| InterfacePtrType interface_ptr_; |
| |
| // For the future objects in derived class. |
| CancellationRelay relay_; |
| |
| private: |
| void BindOnThread(typename InterfacePtrType::PtrInfoType interface_ptr_info, |
| const base::Closure& connection_error_handler) { |
| VLOGF_ENTER(); |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| interface_ptr_.Bind(std::move(interface_ptr_info)); |
| if (!interface_ptr_.is_bound()) { |
| LOGF(ERROR) << "Failed to bind interface_ptr_"; |
| return; |
| } |
| interface_ptr_.set_connection_error_handler(connection_error_handler); |
| interface_ptr_.QueryVersion( |
| base::Bind(&Self::OnQueryVersionOnThread, base::AsWeakPtr(this))); |
| } |
| |
| void OnQueryVersionOnThread(uint32_t version) { |
| VLOGF_ENTER(); |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| LOGF(INFO) << "Bridge ready (version=" << version << ")"; |
| } |
| |
| void ResetInterfacePtrOnThread(const base::Closure& callback) { |
| VLOGF_ENTER(); |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| interface_ptr_.reset(); |
| callback.Run(); |
| } |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(MojoChannelBase); |
| }; |
| |
| template <typename T> |
| using MojoChannel = MojoChannelBase<mojo::InterfacePtr<T>>; |
| |
| template <typename T> |
| using MojoAssociatedChannel = MojoChannelBase<mojo::AssociatedInterfacePtr<T>>; |
| |
| // A wrapper around a mojo::Binding<T>. This template class represents an |
| // implementation of Mojo interface T. |
| template <typename T> |
| class MojoBinding : public T { |
| public: |
| explicit MojoBinding(scoped_refptr<base::SingleThreadTaskRunner> task_runner) |
| : task_runner_(task_runner), binding_(this), weak_ptr_factory_(this) { |
| VLOGF_ENTER(); |
| } |
| |
| ~MojoBinding() { |
| VLOGF_ENTER(); |
| // We need to wait for CloseBindingOnThread to finish before return |
| // otherwise it would cause race condition in destruction of |binding_| and |
| // may CHECK. |
| auto future = cros::Future<void>::Create(nullptr); |
| if (task_runner_->BelongsToCurrentThread()) { |
| CloseBindingOnThread(cros::GetFutureCallback(future)); |
| } else { |
| task_runner_->PostTask(FROM_HERE, |
| base::Bind(&MojoBinding<T>::CloseBindingOnThread, |
| weak_ptr_factory_.GetWeakPtr(), |
| cros::GetFutureCallback(future))); |
| } |
| future->Wait(); |
| } |
| |
| mojo::InterfacePtr<T> CreateInterfacePtr( |
| const base::Closure& connection_error_handler) { |
| VLOGF_ENTER(); |
| auto future = cros::Future<mojo::InterfacePtr<T>>::Create(nullptr); |
| if (task_runner_->BelongsToCurrentThread()) { |
| CreateInterfacePtrOnThread(connection_error_handler, |
| cros::GetFutureCallback(future)); |
| } else { |
| task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&MojoBinding<T>::CreateInterfacePtrOnThread, |
| weak_ptr_factory_.GetWeakPtr(), connection_error_handler, |
| cros::GetFutureCallback(future))); |
| } |
| return future->Get(); |
| } |
| |
| void Bind(mojo::ScopedMessagePipeHandle handle, |
| const base::Closure& connection_error_handler) { |
| VLOGF_ENTER(); |
| task_runner_->PostTask( |
| FROM_HERE, base::Bind(&MojoBinding<T>::BindOnThread, |
| weak_ptr_factory_.GetWeakPtr(), |
| base::Passed(&handle), connection_error_handler)); |
| } |
| |
| protected: |
| // All the methods of T that this class implements run on |task_runner_|. |
| const scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| |
| private: |
| void CloseBindingOnThread(const base::Closure& callback) { |
| VLOGF_ENTER(); |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| if (binding_.is_bound()) { |
| binding_.Close(); |
| } |
| callback.Run(); |
| } |
| |
| void CreateInterfacePtrOnThread( |
| const base::Closure& connection_error_handler, |
| const base::Callback<void(mojo::InterfacePtr<T>)>& cb) { |
| // Call CreateInterfacePtrAndBind() on thread_ to serve the RPC. |
| VLOGF_ENTER(); |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| mojo::InterfacePtr<T> interfacePtr = binding_.CreateInterfacePtrAndBind(); |
| binding_.set_connection_error_handler(connection_error_handler); |
| cb.Run(std::move(interfacePtr)); |
| } |
| |
| void BindOnThread(mojo::ScopedMessagePipeHandle handle, |
| const base::Closure& connection_error_handler) { |
| VLOGF_ENTER(); |
| DCHECK(task_runner_->BelongsToCurrentThread()); |
| binding_.Bind(mojo::InterfaceRequest<T>(std::move(handle))); |
| binding_.set_connection_error_handler(connection_error_handler); |
| } |
| |
| mojo::Binding<T> binding_; |
| |
| base::WeakPtrFactory<MojoBinding<T>> weak_ptr_factory_; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(MojoBinding); |
| }; |
| |
| } // namespace internal |
| } // namespace cros |
| |
| #endif // CAMERA_COMMON_UTILS_CROS_CAMERA_MOJO_UTILS_H_ |