DBus MediaAnalyticsClient and media_perception pb.

chromeos/dbus/fake_media_analytics_client.cc

+// 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/fake_media_analytics_client.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/threading/thread_task_runner_handle.h"
+
+namespace chromeos {
+
+FakeMediaAnalyticsClient::FakeMediaAnalyticsClient()
+    : weak_ptr_factory_(this) {}
+
+FakeMediaAnalyticsClient::~FakeMediaAnalyticsClient() {}
+
+// Override these initializations to do nothing.
+void FakeMediaAnalyticsClient::Init(dbus::Bus* bus) {}
+
+void FakeMediaAnalyticsClient::SetMediaPerceptionSignalHandler(
+    const MediaPerceptionSignalHandler& handler) {
+  media_perception_signal_handler_ = handler;
+  // Also fire a fake MediaPerception detection signal.
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(&FakeMediaAnalyticsClient::OnMediaPerception,
+                            weak_ptr_factory_.GetWeakPtr()));
+}
+
+void FakeMediaAnalyticsClient::UnsetMediaPerceptionSignalHandler() {
+  media_perception_signal_handler_.Reset();
+}
+
+void FakeMediaAnalyticsClient::State(const mri::State& state,
+                                     const StateCallback& callback) {
+  if (state.has_status()) {
+    current_state_ = state;

[tbarzic, 2017/05/05 21:10:42]

can we check that the state is one of the settable ones.

[Luke Sorenson, 2017/05/08 19:06:07]

Do we need to do that, if there is a check in API impl, and can verify that
error in JS?

[tbarzic, 2017/05/08 23:04:55]

I'd add (at least) a DCHECK here - so it catches instances where
(unintentionally) state is set to a wrong value. Plus. it's closer to the actual
implementation.

[Luke Sorenson, 2017/05/09 17:39:45]

Good point. Done.

+  }
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(&FakeMediaAnalyticsClient::OnState,
+                            weak_ptr_factory_.GetWeakPtr(), callback));
+}
+
+void FakeMediaAnalyticsClient::OnState(const StateCallback& callback) {
+  callback.Run(true, current_state_);
+}
+
+void FakeMediaAnalyticsClient::GetDiagnostics(
+    const DiagnosticsCallback& callback) {
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(&FakeMediaAnalyticsClient::OnGetDiagnostics,
+                            weak_ptr_factory_.GetWeakPtr(), callback));
+}
+
+void FakeMediaAnalyticsClient::OnGetDiagnostics(
+    const DiagnosticsCallback& callback) {
+  mri::Diagnostics diagnostics;
+  diagnostics.add_perception_sample()->mutable_frame_perception()->set_frame_id(
+      1);
+  callback.Run(true, diagnostics);
+}
+
+void FakeMediaAnalyticsClient::OnMediaPerception() {
+  if (media_perception_signal_handler_.is_null()) {
+    return;
+  }
+  mri::MediaPerception media_perception;
+  media_perception.set_timestamp(1);
+  media_perception_signal_handler_.Run(media_perception);
+}
+
+}  // namespace chromeos