media/ozone/media_ozone_platform.h

   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 #ifndef MEDIA_OZONE_MEDIA_OZONE_PLATFORM_H_
   6 #define MEDIA_OZONE_MEDIA_OZONE_PLATFORM_H_
   7
   8 #include "base/callback.h"
   9 #include "media/base/media_export.h"
  10
  11 namespace media {
  12
  13 class VideoDecodeAccelerator;
  14
  15 // Class for Ozone platform media implementations. Note that the base class for
  16 // Ozone platform is at ui/ozone.
  17 //
  18 // Ozone platforms must override this class and implement the virtual
  19 // GetFooFactoryOzone() methods to provide implementations of the
  20 // various ozone interfaces.
  21 class MEDIA_EXPORT MediaOzonePlatform {
  22  public:
  23   MediaOzonePlatform();
  24   virtual ~MediaOzonePlatform();
  25
  26   // Besides get the global instance, initializes the subsystems/resources
  27   // necessary for media also.
  28   static MediaOzonePlatform* GetInstance();
  29
  30   // Factory getters to override in subclasses. The returned objects will be
  31   // injected into the appropriate layer at startup. Subclasses should not
  32   // inject these objects themselves. Ownership is retained by
  33   // MediaOzonePlatform.
  34   virtual VideoDecodeAccelerator* CreateVideoDecodeAccelerator(
  35       const base::Callback<bool(void)>& make_context_current);
  36
  37  private:
  38   static void CreateInstance();
  39
  40   static MediaOzonePlatform* instance_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(MediaOzonePlatform);
  43 };
  44
  45 }  // namespace media
  46
  47 #endif  // MEDIA_OZONE_MEDIA_OZONE_PLATFORM_H_