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* CreateMediaOzonePlatformEgltest() {
  40   return new MediaOzonePlatformStub;
  41 }
  42
  43 MediaOzonePlatform* CreateMediaOzonePlatformGbm() {
  44   return new MediaOzonePlatformStub;
  45 }
  46
  47 MediaOzonePlatform* CreateMediaOzonePlatformTest() {
  48   return new MediaOzonePlatformStub;
  49 }
  50
  51 MediaOzonePlatform::MediaOzonePlatform() {
  52   CHECK(!instance_) << "There should only be a single MediaOzonePlatform.";
  53   instance_ = this;
  54 }
  55
  56 MediaOzonePlatform::~MediaOzonePlatform() {
  57   CHECK_EQ(instance_, this);
  58   instance_ = NULL;
  59 }
  60
  61 // static
  62 MediaOzonePlatform* MediaOzonePlatform::GetInstance() {
  63   if (!instance_)
  64     CreateInstance();
  65   return instance_;
  66 }
  67
  68 VideoDecodeAccelerator* MediaOzonePlatform::CreateVideoDecodeAccelerator(
  69     const base::Callback<bool(void)>& make_context_current) {
  70   NOTIMPLEMENTED();
  71   return NULL;
  72 }
  73
  74 // static
  75 void MediaOzonePlatform::CreateInstance() {
  76   if (instance_)
  77     return;
  78
  79   TRACE_EVENT1("ozone",
  80                "MediaOzonePlatform::Initialize",
  81                "platform",
  82                ui::GetOzonePlatformName());
  83   scoped_ptr<MediaOzonePlatform> platform =
  84       ui::PlatformObject<MediaOzonePlatform>::Create();
  85
  86   // TODO(spang): Currently need to leak this object.
  87   CHECK_EQ(instance_, platform.release());
  88 }
  89
  90 // static
  91 MediaOzonePlatform* MediaOzonePlatform::instance_;
  92
  93 }  // namespace media