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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chromeos/dbus/media_analytics_client.h" |
| 6 |
| 7 #include <cstdint> |
| 8 |
| 9 #include "base/bind.h" |
| 10 #include "base/logging.h" |
| 11 #include "base/memory/weak_ptr.h" |
| 12 #include "dbus/bus.h" |
| 13 #include "dbus/message.h" |
| 14 #include "dbus/object_path.h" |
| 15 #include "dbus/object_proxy.h" |
| 16 #include "third_party/cros_system_api/dbus/service_constants.h" |
| 17 |
| 18 namespace chromeos { |
| 19 |
| 20 // The MediaAnalyticsClient implementation used in production. |
| 21 class MediaAnalyticsClientImpl : public MediaAnalyticsClient { |
| 22 public: |
| 23 MediaAnalyticsClientImpl() : dbus_proxy_(nullptr), weak_ptr_factory_(this) {} |
| 24 |
| 25 ~MediaAnalyticsClientImpl() override {} |
| 26 |
| 27 void SetMediaPerceptionSignalHandler( |
| 28 const MediaPerceptionSignalHandler& handler) override { |
| 29 DCHECK(media_perception_signal_handler_.is_null()) |
| 30 << "MediaPerceptionSignalHandler already set and setting it again."; |
| 31 media_perception_signal_handler_ = handler; |
| 32 } |
| 33 |
| 34 void ClearMediaPerceptionSignalHandler() override { |
| 35 media_perception_signal_handler_.Reset(); |
| 36 } |
| 37 |
| 38 void GetState(const StateCallback& callback) override { |
| 39 dbus::MethodCall method_call(media_perception::kMediaPerceptionServiceName, |
| 40 media_perception::kStateFunction); |
| 41 dbus_proxy_->CallMethod( |
| 42 &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| 43 base::Bind(&MediaAnalyticsClientImpl::OnState, |
| 44 weak_ptr_factory_.GetWeakPtr(), callback)); |
| 45 } |
| 46 |
| 47 void SetState(const mri::State& state, |
| 48 const StateCallback& callback) override { |
| 49 DCHECK(state.has_status()) << "Attempting to SetState without status set."; |
| 50 |
| 51 dbus::MethodCall method_call(media_perception::kMediaPerceptionServiceName, |
| 52 media_perception::kStateFunction); |
| 53 int length = state.ByteSize(); |
| 54 uint8_t bytes[length]; |
| 55 state.SerializeToArray(bytes, length); |
| 56 dbus::MessageWriter writer(&method_call); |
| 57 writer.AppendArrayOfBytes(bytes, length); |
| 58 |
| 59 dbus_proxy_->CallMethod( |
| 60 &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| 61 base::Bind(&MediaAnalyticsClientImpl::OnState, |
| 62 weak_ptr_factory_.GetWeakPtr(), callback)); |
| 63 } |
| 64 |
| 65 void GetDiagnostics(const DiagnosticsCallback& callback) override { |
| 66 dbus::MethodCall method_call(media_perception::kMediaPerceptionServiceName, |
| 67 media_perception::kGetDiagnosticsFunction); |
| 68 // TODO(lasoren): Verify that this timeout setting is sufficient. |
| 69 dbus_proxy_->CallMethod( |
| 70 &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, |
| 71 base::Bind(&MediaAnalyticsClientImpl::OnGetDiagnostics, |
| 72 weak_ptr_factory_.GetWeakPtr(), callback)); |
| 73 } |
| 74 |
| 75 protected: |
| 76 void Init(dbus::Bus* bus) override { |
| 77 dbus_proxy_ = bus->GetObjectProxy( |
| 78 media_perception::kMediaPerceptionServiceName, |
| 79 dbus::ObjectPath(media_perception::kMediaPerceptionServicePath)); |
| 80 // Connect to the MediaPerception signal. |
| 81 dbus_proxy_->ConnectToSignal( |
| 82 media_perception::kMediaPerceptionInterface, |
| 83 media_perception::kDetectionSignal, |
| 84 base::Bind(&MediaAnalyticsClientImpl::OnDetectionSignalReceived, |
| 85 weak_ptr_factory_.GetWeakPtr()), |
| 86 base::Bind(&MediaAnalyticsClientImpl::OnSignalConnected, |
| 87 weak_ptr_factory_.GetWeakPtr())); |
| 88 } |
| 89 |
| 90 private: |
| 91 void OnSignalConnected(const std::string& interface, |
| 92 const std::string& signal, |
| 93 bool succeeded) { |
| 94 LOG_IF(ERROR, !succeeded) |
| 95 << "Connect to " << interface << " " << signal << " failed."; |
| 96 } |
| 97 |
| 98 // Handler that is triggered when a MediaPerception proto is received from |
| 99 // the media analytics process. |
| 100 void OnDetectionSignalReceived(dbus::Signal* signal) { |
| 101 if (media_perception_signal_handler_.is_null()) { |
| 102 return; |
| 103 } |
| 104 |
| 105 const uint8_t* bytes = nullptr; |
| 106 size_t length = 0; |
| 107 |
| 108 dbus::MessageReader reader(signal); |
| 109 |
| 110 if (!reader.PopArrayOfBytes(&bytes, &length)) { |
| 111 LOG(ERROR) << "Invalid detection signal: " << signal->ToString(); |
| 112 return; |
| 113 } |
| 114 |
| 115 mri::MediaPerception media_perception; |
| 116 if (!media_perception.ParseFromArray(bytes, length)) { |
| 117 LOG(ERROR) << "Failed to parse MediaPerception message."; |
| 118 return; |
| 119 } |
| 120 |
| 121 media_perception_signal_handler_.Run(media_perception); |
| 122 } |
| 123 |
| 124 void OnState(const StateCallback& callback, dbus::Response* response) { |
| 125 mri::State state; |
| 126 if (!response) { |
| 127 LOG(ERROR) << "Call to State failed to get response."; |
| 128 callback.Run(false, state); |
| 129 return; |
| 130 } |
| 131 |
| 132 const uint8_t* bytes = nullptr; |
| 133 size_t length = 0; |
| 134 |
| 135 dbus::MessageReader reader(response); |
| 136 if (!reader.PopArrayOfBytes(&bytes, &length)) { |
| 137 LOG(ERROR) << "Invalid D-Bus response: " << response->ToString(); |
| 138 callback.Run(false, state); |
| 139 return; |
| 140 } |
| 141 |
| 142 if (!state.ParseFromArray(bytes, length)) { |
| 143 LOG(ERROR) << "Failed to parse State message."; |
| 144 callback.Run(false, state); |
| 145 return; |
| 146 } |
| 147 |
| 148 callback.Run(true, state); |
| 149 } |
| 150 |
| 151 void OnGetDiagnostics(const DiagnosticsCallback& callback, |
| 152 dbus::Response* response) { |
| 153 mri::Diagnostics diagnostics; |
| 154 if (!response) { |
| 155 LOG(ERROR) << "Call to GetDiagnostics failed to get response."; |
| 156 callback.Run(false, diagnostics); |
| 157 return; |
| 158 } |
| 159 |
| 160 const uint8_t* bytes = nullptr; |
| 161 size_t length = 0; |
| 162 |
| 163 dbus::MessageReader reader(response); |
| 164 if (!reader.PopArrayOfBytes(&bytes, &length)) { |
| 165 LOG(ERROR) << "Invalid GetDiagnostics response: " << response->ToString(); |
| 166 callback.Run(false, diagnostics); |
| 167 return; |
| 168 } |
| 169 |
| 170 if (!diagnostics.ParseFromArray(bytes, length)) { |
| 171 LOG(ERROR) << "Failed to parse Diagnostics message."; |
| 172 callback.Run(false, diagnostics); |
| 173 return; |
| 174 } |
| 175 |
| 176 callback.Run(true, diagnostics); |
| 177 } |
| 178 |
| 179 dbus::ObjectProxy* dbus_proxy_; |
| 180 |
| 181 // Stores a handler registered for receiving the media_perception.proto byte |
| 182 // array. |
| 183 MediaPerceptionSignalHandler media_perception_signal_handler_; |
| 184 |
| 185 base::WeakPtrFactory<MediaAnalyticsClientImpl> weak_ptr_factory_; |
| 186 |
| 187 DISALLOW_COPY_AND_ASSIGN(MediaAnalyticsClientImpl); |
| 188 }; |
| 189 |
| 190 MediaAnalyticsClient::~MediaAnalyticsClient() {} |
| 191 |
| 192 MediaAnalyticsClient* MediaAnalyticsClient::Create() { |
| 193 return new MediaAnalyticsClientImpl; |
| 194 } |
| 195 |
| 196 MediaAnalyticsClient::MediaAnalyticsClient() {} |
| 197 |
| 198 } // namespace chromeos |
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