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// Copyright 2020 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_REMOTING_RECEIVER_CONTROLLER_H_
#define MEDIA_REMOTING_RECEIVER_CONTROLLER_H_
#include <memory>
#include "base/no_destructor.h"
#include "media/mojo/mojom/remoting.mojom.h"
#include "media/remoting/rpc_broker.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace media {
namespace remoting {
// ReceiverController is the bridge that owns |rpc_broker_| to allow Receivers
// and StreamProvider::MediaStreams to communicate with the sender via RPC
// calls.
//
// It also forwards calls to a |media_remotee_| instance, which will be
// implemented the browser process. Currently, the only use case will be on
// Chromecast, the Remotee implementation will be implemented in the browser
// code on Chromecast.
//
// NOTE: ReceiverController is a singleton per process.
class ReceiverController : mojom::RemotingSink {
public:
static ReceiverController* GetInstance();
void Initialize(mojo::PendingRemote<mojom::Remotee> remotee);
// Proxy functions to |media_remotee_|.
void OnRendererFlush(uint32_t audio_count, uint32_t video_count);
void OnVideoNaturalSizeChange(const gfx::Size& size);
void StartDataStreams(
mojo::PendingRemote<mojom::RemotingDataStreamReceiver> audio_stream,
mojo::PendingRemote<mojom::RemotingDataStreamReceiver> video_stream);
// The reference of |rpc_broker_|.
media::remoting::RpcBroker* rpc_broker() { return &rpc_broker_; }
private:
friend base::NoDestructor<ReceiverController>;
friend class MockReceiverController;
friend void ResetForTesting(ReceiverController* controller);
ReceiverController();
~ReceiverController() override;
// media::mojom::RemotingSink implementation.
void OnMessageFromSource(const std::vector<uint8_t>& message) override;
// Callback for |rpc_broker_| to send messages.
void OnSendRpc(std::unique_ptr<std::vector<uint8_t>> message);
RpcBroker rpc_broker_;
const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
mojo::Remote<media::mojom::Remotee> media_remotee_;
mojo::Receiver<media::mojom::RemotingSink> receiver_{this};
};
} // namespace remoting
} // namespace media
#endif // MEDIA_REMOTING_RECEIVER_CONTROLLER_H_
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