media/audio/audio_manager.cc

   1 // Copyright (c) 2012 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 "media/audio/audio_manager.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/lazy_instance.h"
  10 #include "base/logging.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "media/audio/fake_audio_log_factory.h"
  13
  14 namespace media {
  15 namespace {
  16 AudioManager* g_last_created = NULL;
  17 }
  18
  19 // Forward declaration of the platform specific AudioManager factory function.
  20 AudioManager* CreateAudioManager(AudioLogFactory* audio_log_factory);
  21
  22 AudioManager::AudioManager() {}
  23
  24 AudioManager::~AudioManager() {
  25   CHECK(!g_last_created || g_last_created == this);
  26   g_last_created = NULL;
  27 }
  28
  29 // static
  30 AudioManager* AudioManager::Create(AudioLogFactory* audio_log_factory) {
  31   CHECK(!g_last_created);
  32   g_last_created = CreateAudioManager(audio_log_factory);
  33   return g_last_created;
  34 }
  35
  36 // static
  37 AudioManager* AudioManager::CreateForTesting() {
  38   static base::LazyInstance<FakeAudioLogFactory>::Leaky fake_log_factory =
  39       LAZY_INSTANCE_INITIALIZER;
  40   return Create(fake_log_factory.Pointer());
  41 }
  42
  43 // static
  44 AudioManager* AudioManager::Get() {
  45   return g_last_created;
  46 }
  47
  48 }  // namespace media