media/base/renderer_factory.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_BASE_RENDERER_FACTORY_H_
#define MEDIA_BASE_RENDERER_FACTORY_H_

#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/media_export.h"
#include "media/base/renderer.h"

namespace base {
class SingleThreadTaskRunner;
}

namespace media {

class AudioRendererSink;

// A factory class for creating media::Renderer to be used by media pipeline.
class MEDIA_EXPORT RendererFactory {
 public:
  RendererFactory();
  virtual ~RendererFactory();

  // Creates and returns a Renderer. All methods of the created Renderer except
  // for GetMediaTime() will be called on the |media_task_runner|.
  // GetMediaTime() could be called on any thread.
  // The created Renderer can use the |audio_renderer_sink| to render audio.
  virtual scoped_ptr<Renderer> CreateRenderer(
      const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
      AudioRendererSink* audio_renderer_sink) = 0;

 private:
  DISALLOW_COPY_AND_ASSIGN(RendererFactory);
};

}  // namespace media

#endif  // MEDIA_BASE_RENDERER_FACTORY_H_