media/base/renderer_factory.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_BASE_RENDERER_FACTORY_H_
   6 #define MEDIA_BASE_RENDERER_FACTORY_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "media/base/media_export.h"
  12 #include "media/base/renderer.h"
  13
  14 namespace base {
  15 class SingleThreadTaskRunner;
  16 class TaskRunner;
  17 }
  18
  19 namespace media {
  20
  21 class AudioRendererSink;
  22 class VideoRendererSink;
  23
  24 // A factory class for creating media::Renderer to be used by media pipeline.
  25 class MEDIA_EXPORT RendererFactory {
  26  public:
  27   RendererFactory();
  28   virtual ~RendererFactory();
  29
  30   // Creates and returns a Renderer. All methods of the created Renderer except
  31   // for GetMediaTime() will be called on the |media_task_runner|.
  32   // GetMediaTime() could be called on any thread.
  33   // The created Renderer can use |audio_renderer_sink| to render audio and
  34   // |video_renderer_sink| to render video.
  35   virtual scoped_ptr<Renderer> CreateRenderer(
  36       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  37       const scoped_refptr<base::TaskRunner>& worker_task_runner,
  38       AudioRendererSink* audio_renderer_sink,
  39       VideoRendererSink* video_renderer_sink) = 0;
  40
  41  private:
  42   DISALLOW_COPY_AND_ASSIGN(RendererFactory);
  43 };
  44
  45 }  // namespace media
  46
  47 #endif  // MEDIA_BASE_RENDERER_FACTORY_H_