Audio extension API.

chrome/browser/extensions/api/audio/audio_api.cc

+// Copyright (c) 2013 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 "chrome/browser/extensions/api/audio/audio_api.h"
+
+#include "base/lazy_instance.h"
+#include "base/values.h"
+#include "chrome/browser/extensions/event_names.h"
+#include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/extensions/extension_system.h"
+
+namespace extensions {
+
+static base::LazyInstance<ProfileKeyedAPIFactory<AudioAPI> >
+g_factory = LAZY_INSTANCE_INITIALIZER;
+
+// static
+ProfileKeyedAPIFactory<AudioAPI>* AudioAPI::GetFactoryInstance() {
+  return &g_factory.Get();
+}
+
+AudioAPI::AudioAPI(Profile* profile)
+    : profile_(profile),
+      service_(AudioService::CreateInstance()) {
+  service_->AddObserver(this);
+}
+
+AudioAPI::~AudioAPI() {
+  service_->RemoveObserver(this);
+  delete service_;
+  service_ = NULL;
+}
+
+AudioService* AudioAPI::GetService() const {
+  return service_;
+}
+
+void AudioAPI::OnDeviceChanged() {
+  if (profile_ && ExtensionSystem::Get(profile_)->event_router()) {
+    scoped_ptr<Event> event(new Event(event_names::kOnAudioDeviceChanged,
+                                      scoped_ptr<ListValue>(new ListValue())));
+    ExtensionSystem::Get(profile_)->event_router()->BroadcastEvent(
+        event.Pass());
+  }
+}
+
+bool AudioGetInfoFunction::RunImpl() {
+  AudioService* service =
+      AudioAPI::GetFactoryInstance()->GetForProfile(profile())->GetService();
+  DCHECK(service);
+  service->StartGetInfo(base::Bind(&AudioGetInfoFunction::OnGetInfoCompleted,
+                                   this));
+  return true;
+}
+
+void AudioGetInfoFunction::OnGetInfoCompleted(const OutputInfo& output_info,
+                                              const InputInfo& input_info,
+                                              bool success) {
+  if (success)
+    results_ = api::audio::GetInfo::Results::Create(output_info, input_info);
+  else
+    SetError("Error occured when querying audio device information.");
+  SendResponse(success);
+}
+
+bool AudioSetActiveDevicesFunction::RunImpl() {
+  // TODO: implement this.
+  return false;
+}
+
+bool AudioSetPropertiesFunction::RunImpl() {
+  // TODO: implement this.
+  return false;
+}
+
+}  // namespace extensions