media/blink/webmediaplayer_params.h

// Copyright 2013 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_BLINK_WEBMEDIAPLAYER_PARAMS_H_
#define MEDIA_BLINK_WEBMEDIAPLAYER_PARAMS_H_

#include <stdint.h>

#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "media/base/media_observer.h"
#include "media/blink/media_blink_export.h"
#include "media/filters/context_3d.h"

namespace base {
class SingleThreadTaskRunner;
class TaskRunner;
}

namespace blink {
class WebContentDecryptionModule;
class WebMediaPlayerClient;
}

namespace media {

class SwitchableAudioRendererSink;
class MediaLog;
class SurfaceManager;

// Holds parameters for constructing WebMediaPlayerImpl without having
// to plumb arguments through various abstraction layers.
class MEDIA_BLINK_EXPORT WebMediaPlayerParams {
 public:
  typedef base::Callback<void(const base::Closure&)> DeferLoadCB;
  typedef base::Callback<Context3D()> Context3DCB;

  // Callback to tell V8 about the amount of memory used by the WebMediaPlayer
  // instance.  The input parameter is the delta in bytes since the last call to
  // AdjustAllocatedMemoryCB and the return value is the total number of bytes
  // used by objects external to V8.  Note: this value includes things that are
  // not the WebMediaPlayer!
  typedef base::Callback<int64_t(int64_t)> AdjustAllocatedMemoryCB;

  // |defer_load_cb|, |audio_renderer_sink|, |compositor_task_runner|, and
  // |context_3d_cb| may be null.
  WebMediaPlayerParams(
      const DeferLoadCB& defer_load_cb,
      const scoped_refptr<SwitchableAudioRendererSink>& audio_renderer_sink,
      const scoped_refptr<MediaLog>& media_log,
      const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
      const scoped_refptr<base::TaskRunner>& worker_task_runner,
      const scoped_refptr<base::SingleThreadTaskRunner>& compositor_task_runner,
      const Context3DCB& context_3d,
      const AdjustAllocatedMemoryCB& adjust_allocated_memory_cb,
      blink::WebContentDecryptionModule* initial_cdm,
      SurfaceManager* surface_manager,
      base::WeakPtr<MediaObserver> media_observer);

  ~WebMediaPlayerParams();

  DeferLoadCB defer_load_cb() const { return defer_load_cb_; }

  const scoped_refptr<SwitchableAudioRendererSink>& audio_renderer_sink()
      const {
    return audio_renderer_sink_;
  }

  const scoped_refptr<MediaLog>& media_log() const {
    return media_log_;
  }

  const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner() const {
    return media_task_runner_;
  }

  const scoped_refptr<base::TaskRunner> worker_task_runner() const {
    return worker_task_runner_;
  }

  const scoped_refptr<base::SingleThreadTaskRunner>& compositor_task_runner()
      const {
    return compositor_task_runner_;
  }

  Context3DCB context_3d_cb() const { return context_3d_cb_; }

  blink::WebContentDecryptionModule* initial_cdm() const {
    return initial_cdm_;
  }

  AdjustAllocatedMemoryCB adjust_allocated_memory_cb() const {
    return adjust_allocated_memory_cb_;
  }

  SurfaceManager* surface_manager() const { return surface_manager_; }

  base::WeakPtr<MediaObserver> media_observer() const {
    return media_observer_;
  }

 private:
  DeferLoadCB defer_load_cb_;
  scoped_refptr<SwitchableAudioRendererSink> audio_renderer_sink_;
  scoped_refptr<MediaLog> media_log_;
  scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
  scoped_refptr<base::TaskRunner> worker_task_runner_;
  scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
  Context3DCB context_3d_cb_;
  AdjustAllocatedMemoryCB adjust_allocated_memory_cb_;

  blink::WebContentDecryptionModule* initial_cdm_;
  SurfaceManager* surface_manager_;
  base::WeakPtr<MediaObserver> media_observer_;

  DISALLOW_IMPLICIT_CONSTRUCTORS(WebMediaPlayerParams);
};

}  // namespace media

#endif  // MEDIA_BLINK_WEBMEDIAPLAYER_PARAMS_H_