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 (browser_context_ && EventRouter::Get(browser_context_)) {
  41     scoped_ptr<Event> event(new Event(
  42         audio::OnDeviceChanged::kEventName,
  43         scoped_ptr<base::ListValue>(new base::ListValue())));
  44     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  45   }
  46 }
  47
  48 ///////////////////////////////////////////////////////////////////////////////
  49
  50 bool AudioGetInfoFunction::RunAsync() {
  51   AudioService* service =
  52       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
  53   DCHECK(service);
  54   service->StartGetInfo(base::Bind(&AudioGetInfoFunction::OnGetInfoCompleted,
  55                                    this));
  56   return true;
  57 }
  58
  59 void AudioGetInfoFunction::OnGetInfoCompleted(const OutputInfo& output_info,
  60                                               const InputInfo& input_info,
  61                                               bool success) {
  62   if (success)
  63     results_ = audio::GetInfo::Results::Create(output_info, input_info);
  64   else
  65     SetError("Error occurred when querying audio device information.");
  66   SendResponse(success);
  67 }
  68
  69 ///////////////////////////////////////////////////////////////////////////////
  70
  71 bool AudioSetActiveDevicesFunction::RunSync() {
  72   scoped_ptr<audio::SetActiveDevices::Params> params(
  73       audio::SetActiveDevices::Params::Create(*args_));
  74   EXTENSION_FUNCTION_VALIDATE(params.get());
  75
  76   AudioService* service =
  77       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
  78   DCHECK(service);
  79
  80   service->SetActiveDevices(params->ids);
  81   return true;
  82 }
  83
  84 ///////////////////////////////////////////////////////////////////////////////
  85
  86 bool AudioSetPropertiesFunction::RunSync() {
  87   scoped_ptr<audio::SetProperties::Params> params(
  88       audio::SetProperties::Params::Create(*args_));
  89   EXTENSION_FUNCTION_VALIDATE(params.get());
  90
  91   AudioService* service =
  92       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
  93   DCHECK(service);
  94
  95   int volume_value = params->properties.volume.get() ?
  96       *params->properties.volume : -1;
  97
  98   int gain_value = params->properties.gain.get() ?
  99       *params->properties.gain : -1;
 100
 101   if (!service->SetDeviceProperties(params->id,
 102                                     params->properties.is_muted,
 103                                     volume_value,
 104                                     gain_value))
 105     return false;
 106   else
 107     return true;
 108 }
 109
 110 }  // namespace extensions