media/ozone/media_ozone_platform.cc

   1 // Copyright 2014 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/ozone/media_ozone_platform.h"
   6
   7 #include "base/logging.h"
   8 #include "base/trace_event/trace_event.h"
   9 #include "ui/ozone/platform_object.h"
  10 #include "ui/ozone/platform_selection.h"
  11
  12 namespace media {
  13
  14 namespace {
  15
  16 class MediaOzonePlatformStub : public MediaOzonePlatform {
  17  public:
  18   MediaOzonePlatformStub() {}
  19
  20   ~MediaOzonePlatformStub() override {}
  21
  22  private:
  23   DISALLOW_COPY_AND_ASSIGN(MediaOzonePlatformStub);
  24 };
  25
  26 }  // namespace
  27
  28 // The following statics are just convenient stubs, declared by the
  29 // generate_constructor_list.py script. They should be removed once the
  30 // internal Ozone platforms decide to actually implement their media specifics.
  31 MediaOzonePlatform* CreateMediaOzonePlatformCaca() {
  32   return new MediaOzonePlatformStub;
  33 }
  34
  35 MediaOzonePlatform* CreateMediaOzonePlatformDri() {
  36   return new MediaOzonePlatformStub;
  37 }
  38
  39 MediaOzonePlatform* CreateMediaOzonePlatformDrm() {
  40   return new MediaOzonePlatformStub;
  41 }
  42
  43 MediaOzonePlatform* CreateMediaOzonePlatformEgltest() {
  44   return new MediaOzonePlatformStub;
  45 }
  46
  47 MediaOzonePlatform* CreateMediaOzonePlatformGbm() {
  48   return new MediaOzonePlatformStub;
  49 }
  50
  51 MediaOzonePlatform* CreateMediaOzonePlatformTest() {
  52   return new MediaOzonePlatformStub;
  53 }
  54
  55 MediaOzonePlatform::MediaOzonePlatform() {
  56   CHECK(!instance_) << "There should only be a single MediaOzonePlatform.";
  57   instance_ = this;
  58 }
  59
  60 MediaOzonePlatform::~MediaOzonePlatform() {
  61   CHECK_EQ(instance_, this);
  62   instance_ = NULL;
  63 }
  64
  65 // static
  66 MediaOzonePlatform* MediaOzonePlatform::GetInstance() {
  67   if (!instance_)
  68     CreateInstance();
  69   return instance_;
  70 }
  71
  72 VideoDecodeAccelerator* MediaOzonePlatform::CreateVideoDecodeAccelerator(
  73     const base::Callback<bool(void)>& make_context_current) {
  74   NOTIMPLEMENTED();
  75   return NULL;
  76 }
  77
  78 // static
  79 void MediaOzonePlatform::CreateInstance() {
  80   if (instance_)
  81     return;
  82
  83   TRACE_EVENT1("ozone",
  84                "MediaOzonePlatform::Initialize",
  85                "platform",
  86                ui::GetOzonePlatformName());
  87   scoped_ptr<MediaOzonePlatform> platform =
  88       ui::PlatformObject<MediaOzonePlatform>::Create();
  89
  90   // TODO(spang): Currently need to leak this object.
  91   CHECK_EQ(instance_, platform.release());
  92 }
  93
  94 // static
  95 MediaOzonePlatform* MediaOzonePlatform::instance_;
  96
  97 }  // namespace media