blob: cfae9541394e80f2e8f7ec858ad518b7c02211e9 [file] [log] [blame]
// Copyright (c) 2012 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.
#include <cstdint>
#include <map>
#include <memory>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/shared_memory_handle.h"
#include "base/memory/weak_ptr.h"
#include "base/process/process.h"
#include "base/sequenced_task_runner_helpers.h"
#include "ipc/ipc_channel_handle.h"
#include "ipc/ipc_listener.h"
#include "remoting/host/audio_capturer.h"
#include "remoting/host/desktop_environment.h"
#include "remoting/host/screen_resolution.h"
#include "remoting/proto/event.pb.h"
#include "remoting/protocol/clipboard_stub.h"
#include "remoting/protocol/errors.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
namespace base {
class SingleThreadTaskRunner;
} // namespace base
namespace IPC {
class ChannelProxy;
class Message;
} // namespace IPC
namespace webrtc {
class MouseCursor;
} // namespace webrtc
struct SerializedDesktopFrame;
namespace remoting {
class AudioPacket;
class ClientSessionControl;
class DesktopSessionConnector;
struct DesktopSessionProxyTraits;
class IpcAudioCapturer;
class IpcMouseCursorMonitor;
class IpcVideoFrameCapturer;
class ScreenControls;
// DesktopSessionProxy is created by an owning DesktopEnvironment to route
// requests from stubs to the DesktopSessionAgent instance through
// the IPC channel. DesktopSessionProxy is owned both by the DesktopEnvironment
// and the stubs, since stubs can out-live their DesktopEnvironment.
// DesktopSessionProxy objects are ref-counted but are always deleted on
// the |caller_tast_runner_| thread. This makes it possible to continue
// to receive IPC messages after the ref-count has dropped to zero, until
// the proxy is deleted. DesktopSessionProxy must therefore avoid creating new
// references to the itself while handling IPC messages and desktop
// attach/detach notifications.
// All public methods of DesktopSessionProxy are called on
// the |caller_task_runner_| thread unless it is specified otherwise.
class DesktopSessionProxy
: public base::RefCountedThreadSafe<DesktopSessionProxy,
public IPC::Listener {
scoped_refptr<base::SingleThreadTaskRunner> audio_capture_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
base::WeakPtr<ClientSessionControl> client_session_control,
base::WeakPtr<DesktopSessionConnector> desktop_session_connector,
const DesktopEnvironmentOptions& options);
// Mirrors DesktopEnvironment.
std::unique_ptr<AudioCapturer> CreateAudioCapturer();
std::unique_ptr<InputInjector> CreateInputInjector();
std::unique_ptr<ScreenControls> CreateScreenControls();
std::unique_ptr<webrtc::DesktopCapturer> CreateVideoCapturer();
std::unique_ptr<webrtc::MouseCursorMonitor> CreateMouseCursorMonitor();
std::string GetCapabilities() const;
void SetCapabilities(const std::string& capabilities);
// IPC::Listener implementation.
bool OnMessageReceived(const IPC::Message& message) override;
void OnChannelConnected(int32_t peer_pid) override;
void OnChannelError() override;
// Connects to the desktop session agent.
bool AttachToDesktop(const IPC::ChannelHandle& desktop_pipe, int session_id);
// Closes the connection to the desktop session agent and cleans up
// the associated resources.
void DetachFromDesktop();
// Disconnects the client session that owns |this|.
void DisconnectSession(protocol::ErrorCode error);
// Stores |audio_capturer| to be used to post captured audio packets. Called
// on the |audio_capture_task_runner_| thread.
void SetAudioCapturer(const base::WeakPtr<IpcAudioCapturer>& audio_capturer);
// APIs used to implement the webrtc::DesktopCapturer interface. These must be
// called on the |video_capture_task_runner_| thread.
void CaptureFrame();
// Stores |video_capturer| to be used to post captured video frames. Called on
// the |video_capture_task_runner_| thread.
void SetVideoCapturer(
const base::WeakPtr<IpcVideoFrameCapturer> video_capturer);
// Stores |mouse_cursor_monitor| to be used to post mouse cursor changes.
// Called on the |video_capture_task_runner_| thread.
void SetMouseCursorMonitor(
const base::WeakPtr<IpcMouseCursorMonitor>& mouse_cursor_monitor);
// APIs used to implement the InputInjector interface.
void InjectClipboardEvent(const protocol::ClipboardEvent& event);
void InjectKeyEvent(const protocol::KeyEvent& event);
void InjectTextEvent(const protocol::TextEvent& event);
void InjectMouseEvent(const protocol::MouseEvent& event);
void InjectTouchEvent(const protocol::TouchEvent& event);
void StartInputInjector(
std::unique_ptr<protocol::ClipboardStub> client_clipboard);
// API used to implement the SessionController interface.
void SetScreenResolution(const ScreenResolution& resolution);
uint32_t desktop_session_id() const { return desktop_session_id_; }
friend class base::DeleteHelper<DesktopSessionProxy>;
friend struct DesktopSessionProxyTraits;
class IpcSharedBufferCore;
class IpcSharedBuffer;
typedef std::map<int, scoped_refptr<IpcSharedBufferCore> > SharedBuffers;
~DesktopSessionProxy() override;
// Returns a shared buffer from the list of known buffers.
scoped_refptr<IpcSharedBufferCore> GetSharedBufferCore(int id);
// Handles AudioPacket notification from the desktop session agent.
void OnAudioPacket(const std::string& serialized_packet);
// Registers a new shared buffer created by the desktop process.
void OnCreateSharedBuffer(int id,
base::SharedMemoryHandle handle,
uint32_t size);
// Drops a cached reference to the shared buffer.
void OnReleaseSharedBuffer(int id);
// Handles CaptureResult notification from the desktop session agent.
void OnCaptureResult(webrtc::DesktopCapturer::Result result,
const SerializedDesktopFrame& serialized_frame);
// Handles MouseCursor notification from the desktop session agent.
void OnMouseCursor(const webrtc::MouseCursor& mouse_cursor);
// Handles InjectClipboardEvent request from the desktop integration process.
void OnInjectClipboardEvent(const std::string& serialized_event);
// Sends a message to the desktop session agent. The message is silently
// deleted if the channel is broken.
void SendToDesktop(IPC::Message* message);
// Task runners:
// - |audio_capturer_| is called back on |audio_capture_task_runner_|.
// - public methods of this class (with some exceptions) are called on
// |caller_task_runner_|.
// - background I/O is served on |io_task_runner_|.
scoped_refptr<base::SingleThreadTaskRunner> audio_capture_task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> ipc_task_runner_;
// Points to the audio capturer receiving captured audio packets.
base::WeakPtr<IpcAudioCapturer> audio_capturer_;
// Points to the client stub passed to StartInputInjector().
std::unique_ptr<protocol::ClipboardStub> client_clipboard_;
// Used to disconnect the client session.
base::WeakPtr<ClientSessionControl> client_session_control_;
// Used to create a desktop session and receive notifications every time
// the desktop process is replaced.
base::WeakPtr<DesktopSessionConnector> desktop_session_connector_;
// Points to the video capturer receiving captured video frames.
base::WeakPtr<IpcVideoFrameCapturer> video_capturer_;
// Points to the mouse cursor monitor receiving mouse cursor changes.
base::WeakPtr<IpcMouseCursorMonitor> mouse_cursor_monitor_;
// IPC channel to the desktop session agent.
std::unique_ptr<IPC::ChannelProxy> desktop_channel_;
int pending_capture_frame_requests_;
// Shared memory buffers by Id. Each buffer is owned by the corresponding
// frame.
SharedBuffers shared_buffers_;
// Keeps the desired screen resolution so it can be passed to a newly attached
// desktop session agent.
ScreenResolution screen_resolution_;
// True if |this| has been connected to the desktop session.
bool is_desktop_session_connected_;
DesktopEnvironmentOptions options_;
// Stores the session id for the proxied desktop process.
uint32_t desktop_session_id_ = UINT32_MAX;
// Destroys |DesktopSessionProxy| instances on the caller's thread.
struct DesktopSessionProxyTraits {
static void Destruct(const DesktopSessionProxy* desktop_session_proxy);
} // namespace remoting