Method OnHost

src/prefs/DevicePrefs.cpp:323–433

}

void DevicePrefs::OnHost(wxCommandEvent & e)
{
   // Bail if we have no hosts
   if (mHostNames.size() < 1)
      return;

   // Find the index for the host API selected
   int index = -1;
   auto apiName = mHostLabels[mHost->GetCurrentSelection()];
   int nHosts = Pa_GetHostApiCount();
   for (int i = 0; i < nHosts; ++i) {
      wxString name = wxSafeConvertMB2WX(Pa_GetHostApiInfo(i)->name);
      if (name == apiName) {
         index = i;
         break;
      }
   }
   // We should always find the host!
   if (index < 0) {
      wxLogDebug(wxT("DevicePrefs::OnHost(): API index not found"));
      return;
   }

   int nDevices = Pa_GetDeviceCount();

   // FIXME: TRAP_ERR PaErrorCode not handled.  nDevices can be negative number.
   if (nDevices == 0) {
      mHost->Clear();
      mHost->Append(_("No audio interfaces"), (void *) NULL);
      mHost->SetSelection(0);
   }

   const std::vector<DeviceSourceMap> &inMaps  = DeviceManager::Instance()->GetInputDeviceMaps();
   const std::vector<DeviceSourceMap> &outMaps = DeviceManager::Instance()->GetOutputDeviceMaps();

   wxArrayString playnames;
   wxArrayString recordnames;
   size_t i;
   int devindex;  /* temp variable to hold the numeric ID of each device in turn */
   wxString device;
   wxString recDevice;

   recDevice = mRecordDevice;
   if (!this->mRecordSource.empty())
      recDevice += wxT(": ") + mRecordSource;

   mRecord->Clear();
   for (i = 0; i < inMaps.size(); i++) {
      if (index == inMaps[i].hostIndex) {
         device   = MakeDeviceSourceString(&inMaps[i]);
         devindex = mRecord->Append(device);
         // We need to const cast here because SetClientData is a wx function
         // It is okay because the original variable is non-const.
         mRecord->SetClientData(devindex, const_cast<DeviceSourceMap *>(&inMaps[i]));
         if (device == recDevice) {  /* if this is the default device, select it */
            mRecord->SetSelection(devindex);
         }
      }