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// 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 COMPONENTS_CAST_STREAMING_RENDERER_CONTROL_RENDERER_CONTROLLER_PROXY_H_
#define COMPONENTS_CAST_STREAMING_RENDERER_CONTROL_RENDERER_CONTROLLER_PROXY_H_
#include "base/functional/callback.h"
#include "base/threading/thread_checker.h"
#include "components/cast_streaming/common/public/mojom/renderer_controller.mojom.h"
#include "media/mojo/mojom/renderer.mojom.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/pending_associated_receiver.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace cast_streaming {
// This class serves the purpose of allowing both the browser and renderer
// processes to connect media::mojom::Renderer receiver and remote endpoints
// without concerns of creation order or race conditions becoming concerns.
class RendererControllerProxy : public mojom::RendererController {
public:
using MojoDisconnectCB = base::OnceCallback<void()>;
explicit RendererControllerProxy(MojoDisconnectCB disconnection_handler);
~RendererControllerProxy() override;
// Binds the frame-specific receiver from the browser process.
void BindRendererController(
mojo::PendingAssociatedReceiver<mojom::RendererController>
pending_receiver);
// Gets the receiver associated with the RenderFrame associated with this
// instance.
mojo::PendingReceiver<media::mojom::Renderer> GetReceiver();
private:
// mojom::RendererController overrides.
//
// Fuses |browser_process_renderer_controls| received from the browser
// process with |renderer_process_remote_|, so that commands sent by the
// browser process are passed immediately to
// |renderer_process_pending_receiver_|.
void SetPlaybackController(mojo::PendingReceiver<media::mojom::Renderer>
browser_process_renderer_controls,
SetPlaybackControllerCallback callback) override;
// Callback from the SetPlaybackController() method. Returned when the
// receiver is taken by the Renderer which uses it.
SetPlaybackControllerCallback set_playback_controller_cb_;
// This handle is bound to the |renderer_process_pending_receiver_| upon
// class construction. When SetPlaybackController() is called, ownership of
// this instance will be transferred away from this class.
mojo::PendingRemote<media::mojom::Renderer> renderer_process_remote_;
// Owned by this class from time of creation until the first call to
// GetReceiver(), at which time its ownership is passed to the caller.
mojo::PendingReceiver<media::mojom::Renderer>
renderer_process_pending_receiver_;
// Receiver passed from the browser process to the renderer process.
mojo::AssociatedReceiver<mojom::RendererController> browser_process_receiver_;
MojoDisconnectCB on_mojo_disconnection_;
THREAD_CHECKER(thread_checker_);
};
} // namespace cast_streaming
#endif // COMPONENTS_CAST_STREAMING_RENDERER_CONTROL_RENDERER_CONTROLLER_PROXY_H_
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