extensions/browser/api/audio/audio_service.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_service.h"
   6
   7 namespace extensions {
   8
   9 class AudioServiceImpl : public AudioService {
  10  public:
  11   AudioServiceImpl() {}
  12   ~AudioServiceImpl() override {}
  13
  14   // Called by listeners to this service to add/remove themselves as observers.
  15   void AddObserver(Observer* observer) override;
  16   void RemoveObserver(Observer* observer) override;
  17
  18   // Start to query audio device information.
  19   void StartGetInfo(const GetInfoCallback& callback) override;
  20   void SetActiveDevices(const DeviceIdList& device_list) override;
  21   bool SetDeviceProperties(const std::string& device_id,
  22                            bool muted,
  23                            int volume,
  24                            int gain) override;
  25 };
  26
  27 void AudioServiceImpl::AddObserver(Observer* observer) {
  28   // TODO: implement this for platforms other than Chrome OS.
  29 }
  30
  31 void AudioServiceImpl::RemoveObserver(Observer* observer) {
  32   // TODO: implement this for platforms other than Chrome OS.
  33 }
  34
  35 AudioService* AudioService::CreateInstance() {
  36   return new AudioServiceImpl;
  37 }
  38
  39 void AudioServiceImpl::StartGetInfo(const GetInfoCallback& callback) {
  40   // TODO: implement this for platforms other than Chrome OS.
  41   if (!callback.is_null())
  42     callback.Run(OutputInfo(), InputInfo(), false);
  43 }
  44
  45 void AudioServiceImpl::SetActiveDevices(const DeviceIdList& device_list) {
  46 }
  47
  48 bool AudioServiceImpl::SetDeviceProperties(const std::string& device_id,
  49                                            bool muted,
  50                                            int volume,
  51                                            int gain) {
  52   return false;
  53 }
  54
  55 }  // namespace extensions