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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_PROTOCOL_CONNECTION_TO_HOST_H_
#define REMOTING_PROTOCOL_CONNECTION_TO_HOST_H_
#include <memory>
#include <string>
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "remoting/protocol/errors.h"
#include "remoting/protocol/network_settings.h"
namespace base {
class SingleThreadTaskRunner;
} // namespace base
namespace remoting::protocol {
class AudioStub;
class ClientStub;
class ClipboardStub;
class HostStub;
class InputStub;
class Session;
class SessionConfig;
class TransportContext;
struct TransportRoute;
class VideoRenderer;
class ConnectionToHost {
public:
// The UI implementations maintain corresponding definitions of this
// enumeration in client_session.js and
// android/java/src/org/chromium/chromoting/jni/JniInterface.java. Be sure to
// update these locations if you make any changes to the ordering.
enum State {
INITIALIZING,
CONNECTING,
AUTHENTICATED,
CONNECTED,
FAILED,
CLOSED,
};
// Returns the literal string of |state|.
static const char* StateToString(State state);
class HostEventCallback {
public:
virtual ~HostEventCallback() {}
// Called when state of the connection changes.
virtual void OnConnectionState(State state, ErrorCode error) = 0;
// Called when ready state of the connection changes. When |ready|
// is set to false some data sent by the peers may be
// delayed. This is used to indicate in the UI when connection is
// temporarily broken.
virtual void OnConnectionReady(bool ready) = 0;
// Called when the route type (direct vs. STUN vs. proxied) changes.
virtual void OnRouteChanged(const std::string& channel_name,
const protocol::TransportRoute& route) = 0;
};
virtual ~ConnectionToHost() {}
// Set the stubs which will handle messages from the host.
// The caller must ensure that stubs out-live the connection.
// Unless otherwise specified, all stubs must be set before Connect()
// is called.
virtual void set_client_stub(ClientStub* client_stub) = 0;
virtual void set_clipboard_stub(ClipboardStub* clipboard_stub) = 0;
virtual void set_video_renderer(VideoRenderer* video_renderer) = 0;
// Initializes audio stream. Must be called before Connect().
// |audio_decode_task_runner| will be used for audio decoding. |audio_stub|
// will be called on the main thread.
virtual void InitializeAudio(
scoped_refptr<base::SingleThreadTaskRunner> audio_decode_task_runner,
base::WeakPtr<AudioStub> audio_stub) = 0;
// Initiates a connection using |session|. |event_callback| will be notified
// of changes in the state of the connection and must outlive the
// ConnectionToHost. Caller must set stubs (see below) before calling Connect.
virtual void Connect(std::unique_ptr<Session> session,
scoped_refptr<TransportContext> transport_context,
HostEventCallback* event_callback) = 0;
// Disconnects the host connection.
virtual void Disconnect(ErrorCode error) = 0;
// Applies network settings. The connection may be blocked until this method
// is called.
virtual void ApplyNetworkSettings(const NetworkSettings& settings) = 0;
// Returns the session configuration that was negotiated with the host.
virtual const SessionConfig& config() = 0;
// Stubs for sending data to the host.
virtual ClipboardStub* clipboard_forwarder() = 0;
virtual HostStub* host_stub() = 0;
virtual InputStub* input_stub() = 0;
// Return the current state of ConnectionToHost.
virtual State state() const = 0;
};
} // namespace remoting::protocol
#endif // REMOTING_PROTOCOL_CONNECTION_TO_HOST_H_
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