extensions/browser/api/audio/audio_api.cc

   1 // Copyright (c) 2013 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 "extensions/browser/api/audio/audio_api.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/values.h"
   9 #include "extensions/browser/event_router.h"
  10 #include "extensions/common/api/audio.h"
  11
  12 namespace extensions {
  13
  14 namespace audio = core_api::audio;
  15
  16 static base::LazyInstance<BrowserContextKeyedAPIFactory<AudioAPI> > g_factory =
  17     LAZY_INSTANCE_INITIALIZER;
  18
  19 // static
  20 BrowserContextKeyedAPIFactory<AudioAPI>* AudioAPI::GetFactoryInstance() {
  21   return g_factory.Pointer();
  22 }
  23
  24 AudioAPI::AudioAPI(content::BrowserContext* context)
  25     : browser_context_(context), service_(AudioService::CreateInstance()) {
  26   service_->AddObserver(this);
  27 }
  28
  29 AudioAPI::~AudioAPI() {
  30   service_->RemoveObserver(this);
  31   delete service_;
  32   service_ = NULL;
  33 }
  34
  35 AudioService* AudioAPI::GetService() const {
  36   return service_;
  37 }
  38
  39 void AudioAPI::OnDeviceChanged() {
  40   if (EventRouter::Get(browser_context_)) {
  41     scoped_ptr<Event> event(new Event(
  42         events::AUDIO_ON_DEVICE_CHANGED, audio::OnDeviceChanged::kEventName,
  43         scoped_ptr<base::ListValue>(new base::ListValue())));
  44     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  45   }
  46 }
  47
  48 void AudioAPI::OnLevelChanged(const std::string& id, int level) {
  49   if (EventRouter::Get(browser_context_)) {
  50     scoped_ptr<base::ListValue> args = audio::OnLevelChanged::Create(id, level);
  51     scoped_ptr<Event> event(new Event(events::AUDIO_ON_LEVEL_CHANGED,
  52                                       audio::OnLevelChanged::kEventName,
  53                                       args.Pass()));
  54     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  55   }
  56 }
  57
  58 void AudioAPI::OnMuteChanged(bool is_input, bool is_muted) {
  59   if (EventRouter::Get(browser_context_)) {
  60     scoped_ptr<base::ListValue> args =
  61         audio::OnMuteChanged::Create(is_input, is_muted);
  62     scoped_ptr<Event> event(new Event(events::AUDIO_ON_MUTE_CHANGED,
  63                                       audio::OnMuteChanged::kEventName,
  64                                       args.Pass()));
  65     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  66   }
  67 }
  68
  69 void AudioAPI::OnDevicesChanged(const DeviceInfoList& devices) {
  70   if (EventRouter::Get(browser_context_)) {
  71     scoped_ptr<base::ListValue> args = audio::OnDevicesChanged::Create(devices);
  72     scoped_ptr<Event> event(new Event(events::AUDIO_ON_DEVICES_CHANGED,
  73                                       audio::OnDevicesChanged::kEventName,
  74                                       args.Pass()));
  75     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  76   }
  77 }
  78
  79 ///////////////////////////////////////////////////////////////////////////////
  80
  81 bool AudioGetInfoFunction::RunAsync() {
  82   AudioService* service =
  83       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
  84   DCHECK(service);
  85   service->StartGetInfo(base::Bind(&AudioGetInfoFunction::OnGetInfoCompleted,
  86                                    this));
  87   return true;
  88 }
  89
  90 void AudioGetInfoFunction::OnGetInfoCompleted(const OutputInfo& output_info,
  91                                               const InputInfo& input_info,
  92                                               bool success) {
  93   if (success)
  94     results_ = audio::GetInfo::Results::Create(output_info, input_info);
  95   else
  96     SetError("Error occurred when querying audio device information.");
  97   SendResponse(success);
  98 }
  99
 100 ///////////////////////////////////////////////////////////////////////////////
 101
 102 bool AudioSetActiveDevicesFunction::RunSync() {
 103   scoped_ptr<audio::SetActiveDevices::Params> params(
 104       audio::SetActiveDevices::Params::Create(*args_));
 105   EXTENSION_FUNCTION_VALIDATE(params.get());
 106
 107   AudioService* service =
 108       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
 109   DCHECK(service);
 110
 111   service->SetActiveDevices(params->ids);
 112   return true;
 113 }
 114
 115 ///////////////////////////////////////////////////////////////////////////////
 116
 117 bool AudioSetPropertiesFunction::RunSync() {
 118   scoped_ptr<audio::SetProperties::Params> params(
 119       audio::SetProperties::Params::Create(*args_));
 120   EXTENSION_FUNCTION_VALIDATE(params.get());
 121
 122   AudioService* service =
 123       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
 124   DCHECK(service);
 125
 126   int volume_value = params->properties.volume.get() ?
 127       *params->properties.volume : -1;
 128
 129   int gain_value = params->properties.gain.get() ?
 130       *params->properties.gain : -1;
 131
 132   if (!service->SetDeviceProperties(params->id,
 133                                     params->properties.is_muted,
 134                                     volume_value,
 135                                     gain_value))
 136     return false;
 137   else
 138     return true;
 139 }
 140
 141 ///////////////////////////////////////////////////////////////////////////////
 142
 143 }  // namespace extensions