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content / browser / renderer_host / media / ref_counted_video_source_provider.h [blame]

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_REF_COUNTED_VIDEO_SOURCE_PROVIDER_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_REF_COUNTED_VIDEO_SOURCE_PROVIDER_H_

#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/video_capture/public/mojom/video_source_provider.mojom.h"

namespace content {

// Enables ref-counted shared ownership of a
// mojo::Remote<video_capture::mojom::VideoSourceProvider>.
// Since instances of this class do not guarantee that the connection stays open
// for its entire lifetime, clients must verify that the connection is bound
// before using it.
class CONTENT_EXPORT RefCountedVideoSourceProvider
    : public base::RefCounted<RefCountedVideoSourceProvider> {
 public:
  RefCountedVideoSourceProvider(
      mojo::Remote<video_capture::mojom::VideoSourceProvider> source_provider,
      base::OnceClosure destruction_cb);

  RefCountedVideoSourceProvider(const RefCountedVideoSourceProvider&) = delete;
  RefCountedVideoSourceProvider& operator=(
      const RefCountedVideoSourceProvider&) = delete;

  base::WeakPtr<RefCountedVideoSourceProvider> GetWeakPtr();

  const mojo::Remote<video_capture::mojom::VideoSourceProvider>&
  source_provider() {
    return source_provider_;
  }

  void ReleaseProviderForTesting();

 private:
  friend class base::RefCounted<RefCountedVideoSourceProvider>;
  ~RefCountedVideoSourceProvider();

  mojo::Remote<video_capture::mojom::VideoSourceProvider> source_provider_;
  base::OnceClosure destruction_cb_;
  base::WeakPtrFactory<RefCountedVideoSourceProvider> weak_ptr_factory_{this};
};

}  // namespace content

#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_REF_COUNTED_VIDEO_SOURCE_PROVIDER_H_