| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chromeos/dbus/media_analytics_client.h" |
| |
| #include <cstdint> |
| #include <string> |
| |
| #include "base/bind.h" |
| #include "base/logging.h" |
| #include "base/memory/weak_ptr.h" |
| #include "dbus/bus.h" |
| #include "dbus/message.h" |
| #include "dbus/object_path.h" |
| #include "dbus/object_proxy.h" |
| #include "third_party/cros_system_api/dbus/service_constants.h" |
| |
| namespace chromeos { |
| |
| // The MediaAnalyticsClient implementation used in production. |
| class MediaAnalyticsClientImpl : public MediaAnalyticsClient { |
| public: |
| MediaAnalyticsClientImpl() : dbus_proxy_(nullptr), weak_ptr_factory_(this) {} |
| |
| ~MediaAnalyticsClientImpl() override = default; |
| |
| void SetMediaPerceptionSignalHandler( |
| const MediaPerceptionSignalHandler& handler) override { |
| DCHECK(media_perception_signal_handler_.is_null()) |
| << "MediaPerceptionSignalHandler already set and setting it again."; |
| media_perception_signal_handler_ = handler; |
| } |
| |
| void ClearMediaPerceptionSignalHandler() override { |
| media_perception_signal_handler_.Reset(); |
| } |
| |
| void GetState(const StateCallback& callback) override { |
| dbus::MethodCall method_call(media_perception::kMediaPerceptionServiceName, |
| media_perception::kStateFunction); |
| dbus_proxy_->CallMethod( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&MediaAnalyticsClientImpl::OnState, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| void SetState(const mri::State& state, |
| const StateCallback& callback) override { |
| DCHECK(state.has_status()) << "Attempting to SetState without status set."; |
| |
| dbus::MethodCall method_call(media_perception::kMediaPerceptionServiceName, |
| media_perception::kStateFunction); |
| |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendProtoAsArrayOfBytes(state); |
| |
| dbus_proxy_->CallMethod( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&MediaAnalyticsClientImpl::OnState, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| void GetDiagnostics(const DiagnosticsCallback& callback) override { |
| dbus::MethodCall method_call(media_perception::kMediaPerceptionServiceName, |
| media_perception::kGetDiagnosticsFunction); |
| // TODO(lasoren): Verify that this timeout setting is sufficient. |
| dbus_proxy_->CallMethod( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| base::BindOnce(&MediaAnalyticsClientImpl::OnGetDiagnostics, |
| weak_ptr_factory_.GetWeakPtr(), callback)); |
| } |
| |
| protected: |
| void Init(dbus::Bus* bus) override { |
| dbus_proxy_ = bus->GetObjectProxy( |
| media_perception::kMediaPerceptionServiceName, |
| dbus::ObjectPath(media_perception::kMediaPerceptionServicePath)); |
| // Connect to the MediaPerception signal. |
| dbus_proxy_->ConnectToSignal( |
| media_perception::kMediaPerceptionInterface, |
| media_perception::kDetectionSignal, |
| base::Bind(&MediaAnalyticsClientImpl::OnDetectionSignalReceived, |
| weak_ptr_factory_.GetWeakPtr()), |
| base::Bind(&MediaAnalyticsClientImpl::OnSignalConnected, |
| weak_ptr_factory_.GetWeakPtr())); |
| } |
| |
| private: |
| void OnSignalConnected(const std::string& interface, |
| const std::string& signal, |
| bool succeeded) { |
| LOG_IF(ERROR, !succeeded) |
| << "Connect to " << interface << " " << signal << " failed."; |
| } |
| |
| // Handler that is triggered when a MediaPerception proto is received from |
| // the media analytics process. |
| void OnDetectionSignalReceived(dbus::Signal* signal) { |
| if (media_perception_signal_handler_.is_null()) { |
| return; |
| } |
| |
| const uint8_t* bytes = nullptr; |
| size_t length = 0; |
| |
| dbus::MessageReader reader(signal); |
| |
| if (!reader.PopArrayOfBytes(&bytes, &length)) { |
| LOG(ERROR) << "Invalid detection signal: " << signal->ToString(); |
| return; |
| } |
| |
| mri::MediaPerception media_perception; |
| if (!media_perception.ParseFromArray(bytes, length)) { |
| LOG(ERROR) << "Failed to parse MediaPerception message."; |
| return; |
| } |
| |
| media_perception_signal_handler_.Run(media_perception); |
| } |
| |
| void OnState(const StateCallback& callback, dbus::Response* response) { |
| mri::State state; |
| if (!response) { |
| LOG(ERROR) << "Call to State failed to get response."; |
| callback.Run(false, state); |
| return; |
| } |
| |
| const uint8_t* bytes = nullptr; |
| size_t length = 0; |
| |
| dbus::MessageReader reader(response); |
| if (!reader.PopArrayOfBytes(&bytes, &length)) { |
| LOG(ERROR) << "Invalid D-Bus response: " << response->ToString(); |
| callback.Run(false, state); |
| return; |
| } |
| |
| if (!state.ParseFromArray(bytes, length)) { |
| LOG(ERROR) << "Failed to parse State message."; |
| callback.Run(false, state); |
| return; |
| } |
| |
| callback.Run(true, state); |
| } |
| |
| void OnGetDiagnostics(const DiagnosticsCallback& callback, |
| dbus::Response* response) { |
| mri::Diagnostics diagnostics; |
| if (!response) { |
| LOG(ERROR) << "Call to GetDiagnostics failed to get response."; |
| callback.Run(false, diagnostics); |
| return; |
| } |
| |
| const uint8_t* bytes = nullptr; |
| size_t length = 0; |
| |
| dbus::MessageReader reader(response); |
| if (!reader.PopArrayOfBytes(&bytes, &length)) { |
| LOG(ERROR) << "Invalid GetDiagnostics response: " << response->ToString(); |
| callback.Run(false, diagnostics); |
| return; |
| } |
| |
| if (!diagnostics.ParseFromArray(bytes, length)) { |
| LOG(ERROR) << "Failed to parse Diagnostics message."; |
| callback.Run(false, diagnostics); |
| return; |
| } |
| |
| callback.Run(true, diagnostics); |
| } |
| |
| dbus::ObjectProxy* dbus_proxy_; |
| |
| // Stores a handler registered for receiving the media_perception.proto byte |
| // array. |
| MediaPerceptionSignalHandler media_perception_signal_handler_; |
| |
| base::WeakPtrFactory<MediaAnalyticsClientImpl> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MediaAnalyticsClientImpl); |
| }; |
| |
| MediaAnalyticsClient::~MediaAnalyticsClient() = default; |
| |
| MediaAnalyticsClient* MediaAnalyticsClient::Create() { |
| return new MediaAnalyticsClientImpl; |
| } |
| |
| MediaAnalyticsClient::MediaAnalyticsClient() = default; |
| |
| } // namespace chromeos |