content/public/browser/desktop_streams_registry.h

// Copyright 2018 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 CONTENT_PUBLIC_BROWSER_DESKTOP_STREAMS_REGISTRY_H_
#define CONTENT_PUBLIC_BROWSER_DESKTOP_STREAMS_REGISTRY_H_

#include "content/common/content_export.h"

class GURL;

namespace content {

struct DesktopMediaID;

// Interface to DesktopStreamsRegistry which is used to store accepted desktop
// media streams for Desktop Capture API. Single instance of this class is
// created at first time use. This should be called on UI thread.
class CONTENT_EXPORT DesktopStreamsRegistry {
 public:
  virtual ~DesktopStreamsRegistry() {}

  static DesktopStreamsRegistry* GetInstance();

  // Adds new stream to the registry. Called by the implementation of
  // desktopCapture.chooseDesktopMedia() API after user has approved access to
  // |source| for the |origin|. Returns identifier of the new stream.
  // |render_frame_id| refers to the RenderFrame requesting the stream.
  virtual std::string RegisterStream(int render_process_id,
                                     int render_frame_id,
                                     const GURL& origin,
                                     const DesktopMediaID& source,
                                     const std::string& extension_name) = 0;

  // Validates stream identifier specified in getUserMedia(). Returns null
  // DesktopMediaID if the specified |id| is invalid, i.e. wasn't generated
  // using RegisterStream() or if it was generated for a different
  // RenderFrame/origin. Otherwise returns ID of the source and removes it from
  // the registry.
  virtual DesktopMediaID RequestMediaForStreamId(
      const std::string& id,
      int render_process_id,
      int render_frame_id,
      const GURL& origin,
      std::string* extension_name) = 0;
};

}  // namespace content

#endif  // CONTENT_PUBLIC_BROWSER_DESKTOP_STREAMS_REGISTRY_H_