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         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(
  52         new Event(audio::OnLevelChanged::kEventName, args.Pass()));
  53     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  54   }
  55 }
  56
  57 void AudioAPI::OnMuteChanged(bool is_input, bool is_muted) {
  58   if (EventRouter::Get(browser_context_)) {
  59     scoped_ptr<base::ListValue> args =
  60         audio::OnMuteChanged::Create(is_input, is_muted);
  61     scoped_ptr<Event> event(
  62         new Event(audio::OnMuteChanged::kEventName, args.Pass()));
  63     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  64   }
  65 }
  66
  67 void AudioAPI::OnDevicesChanged(const DeviceInfoList& devices) {
  68   if (EventRouter::Get(browser_context_)) {
  69     scoped_ptr<base::ListValue> args = audio::OnDevicesChanged::Create(devices);
  70     scoped_ptr<Event> event(
  71         new Event(audio::OnDevicesChanged::kEventName, args.Pass()));
  72     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
  73   }
  74 }
  75
  76 ///////////////////////////////////////////////////////////////////////////////
  77
  78 bool AudioGetInfoFunction::RunAsync() {
  79   AudioService* service =
  80       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
  81   DCHECK(service);
  82   service->StartGetInfo(base::Bind(&AudioGetInfoFunction::OnGetInfoCompleted,
  83                                    this));
  84   return true;
  85 }
  86
  87 void AudioGetInfoFunction::OnGetInfoCompleted(const OutputInfo& output_info,
  88                                               const InputInfo& input_info,
  89                                               bool success) {
  90   if (success)
  91     results_ = audio::GetInfo::Results::Create(output_info, input_info);
  92   else
  93     SetError("Error occurred when querying audio device information.");
  94   SendResponse(success);
  95 }
  96
  97 ///////////////////////////////////////////////////////////////////////////////
  98
  99 bool AudioSetActiveDevicesFunction::RunSync() {
 100   scoped_ptr<audio::SetActiveDevices::Params> params(
 101       audio::SetActiveDevices::Params::Create(*args_));
 102   EXTENSION_FUNCTION_VALIDATE(params.get());
 103
 104   AudioService* service =
 105       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
 106   DCHECK(service);
 107
 108   service->SetActiveDevices(params->ids);
 109   return true;
 110 }
 111
 112 ///////////////////////////////////////////////////////////////////////////////
 113
 114 bool AudioSetPropertiesFunction::RunSync() {
 115   scoped_ptr<audio::SetProperties::Params> params(
 116       audio::SetProperties::Params::Create(*args_));
 117   EXTENSION_FUNCTION_VALIDATE(params.get());
 118
 119   AudioService* service =
 120       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
 121   DCHECK(service);
 122
 123   int volume_value = params->properties.volume.get() ?
 124       *params->properties.volume : -1;
 125
 126   int gain_value = params->properties.gain.get() ?
 127       *params->properties.gain : -1;
 128
 129   if (!service->SetDeviceProperties(params->id,
 130                                     params->properties.is_muted,
 131                                     volume_value,
 132                                     gain_value))
 133     return false;
 134   else
 135     return true;
 136 }
 137
 138 ///////////////////////////////////////////////////////////////////////////////
 139
 140 }  // namespace extensions