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content / renderer / media / win / overlay_state_observer_impl.h [blame]
// Copyright 2022 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_RENDERER_MEDIA_WIN_OVERLAY_STATE_OBSERVER_IMPL_H_
#define CONTENT_RENDERER_MEDIA_WIN_OVERLAY_STATE_OBSERVER_IMPL_H_
#include "content/common/content_export.h"
#include "content/renderer/media/win/overlay_state_service_provider.h"
#include "gpu/command_buffer/common/mailbox.h"
#include "gpu/ipc/common/gpu_channel.mojom.h"
#include "media/base/win/overlay_state_observer_subscription.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace content {
// OverlayStateObserverImpl provides a simple notification API wrapping
// promotion hints from the OverlayStateService for a single mailbox.
// When a client creates the OverlayState a mailbox they want to observe is
// set at construction time. When a promotion hint change is received from the
// OverlayStateService the StateChangedCB is invoked to inform the client of
// the new promotion state.
class CONTENT_EXPORT OverlayStateObserverImpl
: public media::OverlayStateObserverSubscription,
public gpu::mojom::OverlayStateObserver {
public:
static std::unique_ptr<media::OverlayStateObserverSubscription> Create(
OverlayStateServiceProvider* overlay_state_service_provider,
const gpu::Mailbox& mailbox,
StateChangedCB state_changed_cb);
// gpu::mojom::OverlayStateObserver
// When the OverlayStateService has notified us of a change in
// promotion status, invoke the StateChangedCB to notify the
// client.
void OnStateChanged(bool promoted) override;
private:
friend struct std::default_delete<OverlayStateObserverImpl>;
OverlayStateObserverImpl(
OverlayStateServiceProvider* overlay_state_service_provider,
const gpu::Mailbox& mailbox,
StateChangedCB state_changed_cb);
OverlayStateObserverImpl(const OverlayStateObserverImpl&) = delete;
OverlayStateObserverImpl& operator=(const OverlayStateObserverImpl&) = delete;
~OverlayStateObserverImpl() override;
StateChangedCB callback_;
mojo::Receiver<gpu::mojom::OverlayStateObserver> receiver_;
base::WeakPtrFactory<OverlayStateObserverImpl> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_WIN_OVERLAY_STATE_OBSERVER_IMPL_H_