chrome/browser/extensions/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 "chrome/browser/extensions/api/audio/audio_api.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/values.h"
   9 #include "chrome/browser/profiles/profile.h"
  10 #include "chrome/common/extensions/api/audio.h"
  11 #include "extensions/browser/event_router.h"
  12
  13 namespace extensions {
  14
  15 namespace audio = api::audio;
  16
  17 static base::LazyInstance<BrowserContextKeyedAPIFactory<AudioAPI> > g_factory =
  18     LAZY_INSTANCE_INITIALIZER;
  19
  20 // static
  21 BrowserContextKeyedAPIFactory<AudioAPI>* AudioAPI::GetFactoryInstance() {
  22   return g_factory.Pointer();
  23 }
  24
  25 AudioAPI::AudioAPI(content::BrowserContext* context)
  26     : browser_context_(context), service_(AudioService::CreateInstance()) {
  27   service_->AddObserver(this);
  28 }
  29
  30 AudioAPI::~AudioAPI() {
  31   service_->RemoveObserver(this);
  32   delete service_;
  33   service_ = NULL;
  34 }
  35
  36 AudioService* AudioAPI::GetService() const {
  37   return service_;
  38 }
  39
  40 void AudioAPI::OnDeviceChanged() {
  41   if (browser_context_ && EventRouter::Get(browser_context_)) {
  42     scoped_ptr<Event> event(new Event(
  43         audio::OnDeviceChanged::kEventName,
  44         scoped_ptr<base::ListValue>(new base::ListValue())));
  45     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  46   }
  47 }
  48
  49 bool AudioGetInfoFunction::RunImpl() {
  50   AudioService* service =
  51       AudioAPI::GetFactoryInstance()->Get(GetProfile())->GetService();
  52   DCHECK(service);
  53   service->StartGetInfo(base::Bind(&AudioGetInfoFunction::OnGetInfoCompleted,
  54                                    this));
  55   return true;
  56 }
  57
  58 void AudioGetInfoFunction::OnGetInfoCompleted(const OutputInfo& output_info,
  59                                               const InputInfo& input_info,
  60                                               bool success) {
  61   if (success)
  62     results_ = api::audio::GetInfo::Results::Create(output_info, input_info);
  63   else
  64     SetError("Error occurred when querying audio device information.");
  65   SendResponse(success);
  66 }
  67
  68 bool AudioSetActiveDevicesFunction::RunSync() {
  69   scoped_ptr<api::audio::SetActiveDevices::Params> params(
  70       api::audio::SetActiveDevices::Params::Create(*args_));
  71   EXTENSION_FUNCTION_VALIDATE(params.get());
  72
  73   AudioService* service =
  74       AudioAPI::GetFactoryInstance()->Get(GetProfile())->GetService();
  75   DCHECK(service);
  76
  77   service->SetActiveDevices(params->ids);
  78   return true;
  79 }
  80
  81 bool AudioSetPropertiesFunction::RunSync() {
  82   scoped_ptr<api::audio::SetProperties::Params> params(
  83       api::audio::SetProperties::Params::Create(*args_));
  84   EXTENSION_FUNCTION_VALIDATE(params.get());
  85
  86   AudioService* service =
  87       AudioAPI::GetFactoryInstance()->Get(GetProfile())->GetService();
  88   DCHECK(service);
  89
  90   int volume_value = params->properties.volume.get() ?
  91       *params->properties.volume : -1;
  92
  93   int gain_value = params->properties.gain.get() ?
  94       *params->properties.gain : -1;
  95
  96   if (!service->SetDeviceProperties(params->id,
  97                                     params->properties.is_muted,
  98                                     volume_value,
  99                                     gain_value))
 100     return false;
 101   else
 102     return true;
 103 }
 104
 105 }  // namespace extensions