crossdesk/src/single_window/render_callback_func.cpp

#include "device_controller.h"
#include "localization.h"
#include "platform.h"
#include "rd_log.h"
#include "render.h"

#define NV12_BUFFER_SIZE 1280 * 720 * 3 / 2

#define STREAM_FRASH (SDL_USEREVENT + 1)

#ifdef REMOTE_DESK_DEBUG
#else
#define MOUSE_CONTROL 1
#endif

int Render::SendKeyCommand(int key_code, bool is_down) {
  RemoteAction remote_action;
  remote_action.type = ControlType::keyboard;
  if (is_down) {
    remote_action.k.flag = KeyFlag::key_down;
  } else {
    remote_action.k.flag = KeyFlag::key_up;
  }
  remote_action.k.key_value = key_code;

  if (!controlled_remote_id_.empty()) {
    if (client_properties_.find(controlled_remote_id_) !=
        client_properties_.end()) {
      auto props = client_properties_[controlled_remote_id_];
      if (props->connection_status_ == ConnectionStatus::Connected) {
        SendDataFrame(props->peer_, (const char *)&remote_action,
                      sizeof(remote_action), props->data_label_.c_str());
      }
    }
  }

  return 0;
}

int Render::ProcessMouseEvent(SDL_Event &event) {
  controlled_remote_id_ = "";
  int video_width, video_height = 0;
  int render_width, render_height = 0;
  float ratio_x, ratio_y = 0;
  RemoteAction remote_action;

  for (auto &it : client_properties_) {
    auto props = it.second;
    if (!props->control_mouse_) {
      continue;
    }

    if (event.button.x >= props->stream_render_rect_.x &&
        event.button.x <=
            props->stream_render_rect_.x + props->stream_render_rect_.w &&
        event.button.y >= props->stream_render_rect_.y &&
        event.button.y <=
            props->stream_render_rect_.y + props->stream_render_rect_.h) {
      controlled_remote_id_ = it.first;
      render_width = props->stream_render_rect_.w;
      render_height = props->stream_render_rect_.h;
      last_mouse_event.button.x = event.button.x;
      last_mouse_event.button.y = event.button.y;

      remote_action.m.x =
          (float)(event.button.x - props->stream_render_rect_.x) / render_width;
      remote_action.m.y =
          (float)(event.button.y - props->stream_render_rect_.y) /
          render_height;

      if (SDL_MOUSEBUTTONDOWN == event.type) {
        remote_action.type = ControlType::mouse;
        if (SDL_BUTTON_LEFT == event.button.button) {
          remote_action.m.flag = MouseFlag::left_down;
        } else if (SDL_BUTTON_RIGHT == event.button.button) {
          remote_action.m.flag = MouseFlag::right_down;
        } else if (SDL_BUTTON_MIDDLE == event.button.button) {
          remote_action.m.flag = MouseFlag::middle_down;
        }
      } else if (SDL_MOUSEBUTTONUP == event.type) {
        remote_action.type = ControlType::mouse;
        if (SDL_BUTTON_LEFT == event.button.button) {
          remote_action.m.flag = MouseFlag::left_up;
        } else if (SDL_BUTTON_RIGHT == event.button.button) {
          remote_action.m.flag = MouseFlag::right_up;
        } else if (SDL_BUTTON_MIDDLE == event.button.button) {
          remote_action.m.flag = MouseFlag::middle_up;
        }
      } else if (SDL_MOUSEMOTION == event.type) {
        remote_action.type = ControlType::mouse;
        remote_action.m.flag = MouseFlag::move;
      }

      if (props->control_bar_hovered_ || props->display_selectable_hovered_) {
        remote_action.m.flag = MouseFlag::move;
      }
      SendDataFrame(props->peer_, (const char *)&remote_action,
                    sizeof(remote_action), props->data_label_.c_str());
    } else if (SDL_MOUSEWHEEL == event.type &&
               last_mouse_event.button.x >= props->stream_render_rect_.x &&
               last_mouse_event.button.x <= props->stream_render_rect_.x +
                                                props->stream_render_rect_.w &&
               last_mouse_event.button.y >= props->stream_render_rect_.y &&
               last_mouse_event.button.y <= props->stream_render_rect_.y +
                                                props->stream_render_rect_.h) {
      int scroll_x = event.wheel.x;
      int scroll_y = event.wheel.y;
      if (event.wheel.direction == SDL_MOUSEWHEEL_FLIPPED) {
        scroll_x = -scroll_x;
        scroll_y = -scroll_y;
      }

      remote_action.type = ControlType::mouse;
      if (scroll_x == 0) {
        remote_action.m.flag = MouseFlag::wheel_vertical;
        remote_action.m.s = scroll_y;
      } else if (scroll_y == 0) {
        remote_action.m.flag = MouseFlag::wheel_horizontal;
        remote_action.m.s = scroll_x;
      }

      render_width = props->stream_render_rect_.w;
      render_height = props->stream_render_rect_.h;
      remote_action.m.x =
          (float)(event.button.x - props->stream_render_rect_.x) / render_width;
      remote_action.m.y =
          (float)(event.button.y - props->stream_render_rect_.y) /
          render_height;

      SendDataFrame(props->peer_, (const char *)&remote_action,
                    sizeof(remote_action), props->data_label_.c_str());
    }
  }

  return 0;
}

void Render::SdlCaptureAudioIn(void *userdata, Uint8 *stream, int len) {
  Render *render = (Render *)userdata;
  if (!render) {
    return;
  }

  if (1) {
    for (auto it : render->client_properties_) {
      auto props = it.second;
      if (props->connection_status_ == ConnectionStatus::Connected) {
        SendAudioFrame(props->peer_, (const char *)stream, len,
                       render->audio_label_.c_str());
      }
    }

  } else {
    memcpy(render->audio_buffer_, stream, len);
    render->audio_len_ = len;
    SDL_Delay(10);
    render->audio_buffer_fresh_ = true;
  }
}

void Render::SdlCaptureAudioOut([[maybe_unused]] void *userdata,
                                [[maybe_unused]] Uint8 *stream,
                                [[maybe_unused]] int len) {
  // Render *render = (Render *)userdata;
  // for (auto it : render->client_properties_) {
  //   auto props = it.second;
  //   if (props->connection_status_ == SignalStatus::SignalConnected) {
  //     SendAudioFrame(props->peer_, (const char *)stream, len);
  //   }
  // }

  // if (!render->audio_buffer_fresh_) {
  //   return;
  // }

  // SDL_memset(stream, 0, len);

  // if (render->audio_len_ == 0) {
  //   return;
  // } else {
  // }

  // len = (len > render->audio_len_ ? render->audio_len_ : len);
  // SDL_MixAudioFormat(stream, render->audio_buffer_, AUDIO_S16LSB, len,
  //                    SDL_MIX_MAXVOLUME);
  // render->audio_buffer_fresh_ = false;
}

void Render::OnReceiveVideoBufferCb(const XVideoFrame *video_frame,
                                    const char *user_id, size_t user_id_size,
                                    void *user_data) {
  Render *render = (Render *)user_data;
  if (!render) {
    return;
  }

  std::string remote_id(user_id, user_id_size);
  if (render->client_properties_.find(remote_id) ==
      render->client_properties_.end()) {
    return;
  }
  SubStreamWindowProperties *props =
      render->client_properties_.find(remote_id)->second.get();

  if (props->connection_established_) {
    if (!props->dst_buffer_) {
      props->dst_buffer_capacity_ = video_frame->size;
      props->dst_buffer_ = new unsigned char[video_frame->size];
    }

    if (props->dst_buffer_capacity_ < video_frame->size) {
      delete props->dst_buffer_;
      props->dst_buffer_capacity_ = video_frame->size;
      props->dst_buffer_ = new unsigned char[video_frame->size];
    }

    memcpy(props->dst_buffer_, video_frame->data, video_frame->size);
    bool need_to_update_render_rect = false;
    if (props->video_width_ != props->video_width_last_ ||
        props->video_height_ != props->video_height_last_) {
      need_to_update_render_rect = true;
      props->video_width_last_ = props->video_width_;
      props->video_height_last_ = props->video_height_;
    }
    props->video_width_ = video_frame->width;
    props->video_height_ = video_frame->height;
    props->video_size_ = video_frame->size;

    if (need_to_update_render_rect) {
      render->UpdateRenderRect();
    }

    SDL_Event event;
    event.type = STREAM_FRASH;
    event.user.type = STREAM_FRASH;
    event.user.data1 = props;
    SDL_PushEvent(&event);
    props->streaming_ = true;
  }
}

void Render::OnReceiveAudioBufferCb(const char *data, size_t size,
                                    const char *user_id, size_t user_id_size,
                                    void *user_data) {
  Render *render = (Render *)user_data;
  if (!render) {
    return;
  }

  render->audio_buffer_fresh_ = true;
  SDL_QueueAudio(render->output_dev_, data, (uint32_t)size);
}

std::vector<std::string> restore_display_list(char **display_list,
                                              size_t display_num) {
  std::vector<std::string> result;
  result.reserve(display_num);  // 预分配空间，提升效率

  for (size_t i = 0; i < display_num; i++) {
    if (display_list[i] != nullptr) {
      // 直接用std::string构造函数复制C字符串
      result.emplace_back(display_list[i]);
    } else {
      // 如果遇到nullptr指针，放空字符串或者处理错误
      result.emplace_back("");
    }
  }

  return result;
}

void Render::OnReceiveDataBufferCb(const char *data, size_t size,
                                   const char *user_id, size_t user_id_size,
                                   void *user_data) {
  Render *render = (Render *)user_data;
  if (!render) {
    return;
  }

  RemoteAction remote_action;
  memcpy(&remote_action, data, size);

  std::string remote_id(user_id, user_id_size);
  if (render->client_properties_.find(remote_id) !=
      render->client_properties_.end()) {
    // local
    auto props = render->client_properties_.find(remote_id)->second;
    RemoteAction host_info;
    if (DeserializeRemoteAction(data, size, host_info)) {
      if (ControlType::host_infomation == host_info.type) {
        props->remote_host_name_ =
            std::string(host_info.i.host_name, host_info.i.host_name_size);
        LOG_INFO("Remote hostname: [{}]", props->remote_host_name_);

        for (int i = 0; i < host_info.i.display_num; i++) {
          props->display_info_list_.push_back(DisplayInfo(
              std::string(host_info.i.display_list[i]), host_info.i.left[i],
              host_info.i.top[i], host_info.i.right[i], host_info.i.bottom[i]));
          LOG_INFO("Remote display [{}:{}], bound [({}, {}) ({}, {})]", i + 1,
                   props->display_info_list_[i].name,
                   props->display_info_list_[i].left,
                   props->display_info_list_[i].top,
                   props->display_info_list_[i].right,
                   props->display_info_list_[i].bottom);
        }
      }
    } else {
      props->remote_host_name_ = std::string(remote_action.i.host_name,
                                             remote_action.i.host_name_size);
      LOG_INFO("Remote hostname: [{}]", props->remote_host_name_);
      LOG_ERROR("No remote display detected");
    }
    FreeRemoteAction(host_info);
  } else {
    // remote
    if (ControlType::mouse == remote_action.type && render->mouse_controller_) {
      render->mouse_controller_->SendMouseCommand(remote_action,
                                                  render->selected_display_);
    } else if (ControlType::audio_capture == remote_action.type) {
      if (remote_action.a) {
        render->StartSpeakerCapturer();
        render->audio_capture_ = true;
      } else {
        render->StopSpeakerCapturer();
        render->audio_capture_ = false;
      }
    } else if (ControlType::keyboard == remote_action.type &&
               render->keyboard_capturer_) {
      render->keyboard_capturer_->SendKeyboardCommand(
          (int)remote_action.k.key_value,
          remote_action.k.flag == KeyFlag::key_down);
    } else if (ControlType::display_id == remote_action.type) {
      if (render->screen_capturer_) {
        render->selected_display_ = remote_action.d;
        render->screen_capturer_->SwitchTo(remote_action.d);
      }
    }
  }
}

void Render::OnSignalStatusCb(SignalStatus status, const char *user_id,
                              size_t user_id_size, void *user_data) {
  Render *render = (Render *)user_data;
  if (!render) {
    return;
  }

  std::string client_id(user_id, user_id_size);
  if (client_id == render->client_id_) {
    render->signal_status_ = status;
    if (SignalStatus::SignalConnecting == status) {
      render->signal_connected_ = false;
    } else if (SignalStatus::SignalConnected == status) {
      render->signal_connected_ = true;
      LOG_INFO("[{}] connected to signal server", client_id);
    } else if (SignalStatus::SignalFailed == status) {
      render->signal_connected_ = false;
    } else if (SignalStatus::SignalClosed == status) {
      render->signal_connected_ = false;
    } else if (SignalStatus::SignalReconnecting == status) {
      render->signal_connected_ = false;
    } else if (SignalStatus::SignalServerClosed == status) {
      render->signal_connected_ = false;
    }
  } else {
    if (client_id.rfind("C-", 0) != 0) {
      return;
    }

    std::string remote_id(client_id.begin() + 2, client_id.end());
    if (render->client_properties_.find(remote_id) ==
        render->client_properties_.end()) {
      return;
    }
    auto props = render->client_properties_.find(remote_id)->second;
    props->signal_status_ = status;
    if (SignalStatus::SignalConnecting == status) {
      props->signal_connected_ = false;
    } else if (SignalStatus::SignalConnected == status) {
      props->signal_connected_ = true;
      LOG_INFO("[{}] connected to signal server", remote_id);
    } else if (SignalStatus::SignalFailed == status) {
      props->signal_connected_ = false;
    } else if (SignalStatus::SignalClosed == status) {
      props->signal_connected_ = false;
    } else if (SignalStatus::SignalReconnecting == status) {
      props->signal_connected_ = false;
    } else if (SignalStatus::SignalServerClosed == status) {
      props->signal_connected_ = false;
    }
  }
}

void Render::OnConnectionStatusCb(ConnectionStatus status, const char *user_id,
                                  const size_t user_id_size, void *user_data) {
  Render *render = (Render *)user_data;
  if (!render) return;

  std::string remote_id(user_id, user_id_size);
  auto it = render->client_properties_.find(remote_id);
  auto props = (it != render->client_properties_.end()) ? it->second : nullptr;

  if (props) {
    render->is_client_mode_ = true;
    render->show_connection_status_window_ = true;
    props->connection_status_ = status;

    switch (status) {
      case ConnectionStatus::Connected:
        if (!render->need_to_create_stream_window_ &&
            !render->client_properties_.empty()) {
          render->need_to_create_stream_window_ = true;
        }
        props->connection_established_ = true;
        props->stream_render_rect_ = {
            0, (int)render->title_bar_height_,
            (int)render->stream_window_width_,
            (int)(render->stream_window_height_ - render->title_bar_height_)};
        break;
      case ConnectionStatus::Disconnected:
      case ConnectionStatus::Failed:
      case ConnectionStatus::Closed:
        render->password_validating_time_ = 0;
        render->start_screen_capturer_ = false;
        render->start_mouse_controller_ = false;
        render->start_keyboard_capturer_ = false;
        render->control_mouse_ = false;
        props->connection_established_ = false;
        props->mouse_control_button_pressed_ = false;
        if (props->dst_buffer_) {
          memset(props->dst_buffer_, 0, props->dst_buffer_capacity_);
          SDL_UpdateTexture(props->stream_texture_, NULL, props->dst_buffer_,
                            props->texture_width_);
        }
        break;
      case ConnectionStatus::IncorrectPassword:
        render->password_validating_ = false;
        render->password_validating_time_++;
        if (render->connect_button_pressed_) {
          render->connect_button_pressed_ = false;
          props->connection_established_ = false;
          render->connect_button_label_ =
              localization::connect[render->localization_language_index_];
        }
        break;
      case ConnectionStatus::NoSuchTransmissionId:
        if (render->connect_button_pressed_) {
          props->connection_established_ = false;
          render->connect_button_label_ =
              localization::connect[render->localization_language_index_];
        }
        break;
      default:
        break;
    }
  } else {
    render->is_client_mode_ = false;
    render->show_connection_status_window_ = true;

    switch (status) {
      case ConnectionStatus::Connected:
        render->need_to_send_host_info_ = true;
        render->start_screen_capturer_ = true;
        render->start_mouse_controller_ = true;
        break;
      case ConnectionStatus::Closed:
        render->start_screen_capturer_ = false;
        render->start_mouse_controller_ = false;
        render->start_keyboard_capturer_ = false;
        render->need_to_send_host_info_ = false;
        if (props) props->connection_established_ = false;
        if (render->audio_capture_) {
          render->StopSpeakerCapturer();
          render->audio_capture_ = false;
        }
        break;
      default:
        break;
    }
  }
}

void Render::NetStatusReport(const char *client_id, size_t client_id_size,
                             TraversalMode mode,
                             const XNetTrafficStats *net_traffic_stats,
                             const char *user_id, const size_t user_id_size,
                             void *user_data) {
  Render *render = (Render *)user_data;
  if (!render) {
    return;
  }

  if (0 == strcmp(render->client_id_, "")) {
    memset(&render->client_id_, 0, sizeof(render->client_id_));
    memcpy(render->client_id_, client_id, client_id_size);
    LOG_INFO("Use client id [{}] and save id into cache file", client_id);
    render->SaveSettingsIntoCacheFile();
  }

  std::string remote_id(user_id, user_id_size);
  if (render->client_properties_.find(remote_id) ==
      render->client_properties_.end()) {
    return;
  }
  auto props = render->client_properties_.find(remote_id)->second;
  if (props->traversal_mode_ != mode) {
    props->traversal_mode_ = mode;
    LOG_INFO("Net mode: [{}]", int(props->traversal_mode_));
  }

  if (!net_traffic_stats) {
    return;
  }

  // only display client side net status if connected to itself
  if (!(render->peer_reserved_ && !strstr(client_id, "C-"))) {
    props->net_traffic_stats_ = *net_traffic_stats;
  }
}