media/base/win/mf_initializer.cc

   1 // Copyright 2015 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/base/win/mf_initializer.h"
   6
   7 #include <mfapi.h>
   8
   9 #include "base/lazy_instance.h"
  10 #include "base/macros.h"
  11
  12 namespace media {
  13
  14 namespace {
  15
  16 // LazyInstance to initialize the Media Foundation Library.
  17 class MFInitializer {
  18  public:
  19   MFInitializer()
  20       : mf_started_(MFStartup(MF_VERSION, MFSTARTUP_LITE) == S_OK) {}
  21
  22   ~MFInitializer() {
  23     if (mf_started_)
  24       MFShutdown();
  25   }
  26
  27  private:
  28   const bool mf_started_;
  29
  30   DISALLOW_COPY_AND_ASSIGN(MFInitializer);
  31 };
  32
  33 base::LazyInstance<MFInitializer> g_mf_initializer = LAZY_INSTANCE_INITIALIZER;
  34
  35 }  // namespace
  36
  37 void InitializeMediaFoundation() {
  38   g_mf_initializer.Get();
  39 }
  40
  41 }  // namespace media