C++ CCECBusDevice::RequestPowerStatus方法代码示例

//.........这里部分代码省略.........
  if (!m_communication->SupportsSourceLogicalAddress(CECDEVICE_UNREGISTERED))
  {
    if (m_communication->SupportsSourceLogicalAddress(CECDEVICE_FREEUSE))
      sourceAddress = CECDEVICE_FREEUSE;
    else
    {
      m_libcec->AddLog(CEC_LOG_ERROR, "failed to register a new CEC client: both unregistered and free use are not supported by the device");
      return false;
    }
  }

  // ensure that we know the vendor id of the TV
  CCECBusDevice *tv = GetTV();
  cec_vendor_id tvVendor(tv->GetVendorId(sourceAddress));

  // wait until the handler is replaced, to avoid double registrations
  if (tvVendor != CEC_VENDOR_UNKNOWN &&
      CCECCommandHandler::HasSpecificHandler(tvVendor))
  {
    while (!tv->ReplaceHandler(false))
      CEvent::Sleep(5);
  }

  // get the configuration from the client
  m_libcec->AddLog(CEC_LOG_NOTICE, "registering new CEC client - v%s", ToString((cec_client_version)configuration.clientVersion));

  // get the current ackmask, so we can restore it if polling fails
  cec_logical_addresses previousMask = GetLogicalAddresses();

  // mark as uninitialised
  client->SetInitialised(false);

  // find logical addresses for this client
  if (!AllocateLogicalAddresses(client))
  {
    m_libcec->AddLog(CEC_LOG_ERROR, "failed to register the new CEC client - cannot allocate the requested device types");
    SetLogicalAddresses(previousMask);
    return false;
  }

  // get the settings from the rom
  if (configuration.bGetSettingsFromROM == 1)
  {
    libcec_configuration config; config.Clear();
    m_communication->GetConfiguration(config);

    CLockObject lock(m_mutex);
    if (!config.deviceTypes.IsEmpty())
      configuration.deviceTypes = config.deviceTypes;
    if (CLibCEC::IsValidPhysicalAddress(config.iPhysicalAddress))
      configuration.iPhysicalAddress = config.iPhysicalAddress;
    snprintf(configuration.strDeviceName, 13, "%s", config.strDeviceName);
  }

  // set the firmware version and build date
  configuration.serverVersion      = LIBCEC_VERSION_CURRENT;
  configuration.iFirmwareVersion   = m_communication->GetFirmwareVersion();
  configuration.iFirmwareBuildDate = m_communication->GetFirmwareBuildDate();
  configuration.adapterType        = m_communication->GetAdapterType();

  // mark the client as registered
  client->SetRegistered(true);

  sourceAddress = client->GetPrimaryLogicalAdddress();

  // initialise the client
  bool bReturn = client->OnRegister();

  // log the new registration
  CStdString strLog;
  strLog.Format("%s: %s", bReturn ? "CEC client registered" : "failed to register the CEC client", client->GetConnectionInfo().c_str());
  m_libcec->AddLog(bReturn ? CEC_LOG_NOTICE : CEC_LOG_ERROR, strLog);

  // display a warning if the firmware can be upgraded
  if (bReturn && !IsRunningLatestFirmware())
  {
    const char *strUpgradeMessage = "The firmware of this adapter can be upgraded. Please visit http://blog.pulse-eight.com/ for more information.";
    m_libcec->AddLog(CEC_LOG_WARNING, strUpgradeMessage);
    libcec_parameter param;
    param.paramData = (void*)strUpgradeMessage; param.paramType = CEC_PARAMETER_TYPE_STRING;
    client->Alert(CEC_ALERT_SERVICE_DEVICE, param);
  }

  // ensure that the command handler for the TV is initialised
  if (bReturn)
  {
    CCECCommandHandler *handler = GetTV()->GetHandler();
    if (handler)
      handler->InitHandler();
    GetTV()->MarkHandlerReady();
  }

  // report our OSD name to the TV, since some TVs don't request it
  client->GetPrimaryDevice()->TransmitOSDName(CECDEVICE_TV, false);

  // request the power status of the TV
  tv->RequestPowerStatus(sourceAddress, true, true);

  return bReturn;
}