media/base/media_permission.h

// Copyright 2015 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_MEDIA_PERMISSION_H_
#define MEDIA_BASE_MEDIA_PERMISSION_H_

#include "base/callback.h"
#include "base/macros.h"
#include "media/base/media_export.h"

namespace media {

// Interface to handle media related permission checks and requests.
class MEDIA_EXPORT MediaPermission {
 public:
  typedef base::Callback<void(bool)> PermissionStatusCB;

  enum Type {
    PROTECTED_MEDIA_IDENTIFIER,
    AUDIO_CAPTURE,
    VIDEO_CAPTURE,
  };

  MediaPermission();
  virtual ~MediaPermission();

  // Checks whether |type| is permitted without triggering user interaction
  // (e.g. permission prompt). The status will be |false| if the permission
  // has never been set.
  virtual void HasPermission(
      Type type,
      const PermissionStatusCB& permission_status_cb) = 0;

  // Requests |type| permission. This may trigger user interaction
  // (e.g. permission prompt) if the permission has never been set.
  virtual void RequestPermission(
      Type type,
      const PermissionStatusCB& permission_status_cb) = 0;

  // Whether to allow the use of Encrypted Media Extensions (EME), except for
  // the use of Clear Key key systems, which is always allowed as required by
  // the spec.
  virtual bool IsEncryptedMediaEnabled() = 0;

 private:
  DISALLOW_COPY_AND_ASSIGN(MediaPermission);
};

}  // namespace media

#endif  // MEDIA_BASE_MEDIA_PERMISSION_H_