Method Initialize

modules/import-export/mod-pcm/ExportPCM.cpp:536–687

bool PCMExportProcessor::Initialize(AudacityProject& project,
   const Parameters& parameters,
   const wxFileNameWrapper& fName,
   double t0, double t1, bool selectionOnly,
   double sampleRate, unsigned numChannels,
   MixerOptions::Downmix* mixerSpec,
   const Tags* metadata)
{
   context.t0 = t0;
   context.t1 = t1;
   context.fName = fName;

   // Set a default in case the settings aren't found
   int& sf_format = context.sf_format;

   switch (context.subformat)
   {
#if defined(__WXMAC__)
      case FMT_AIFF:
         sf_format = SF_FORMAT_AIFF;
      break;
#endif

      case FMT_WAV:
         sf_format = SF_FORMAT_WAV;
      break;

   default:
      // Retrieve the current format.
      sf_format = ExportPluginHelpers::GetParameterValue(parameters, OptionIDSFType, 0);
      break;
   }

   sf_format |= ExportPluginHelpers::GetParameterValue(parameters, sf_format, 0);

   // If subtype is still not specified, supply a default.
   if (!(sf_format & SF_FORMAT_SUBMASK))
   {
      sf_format |= SF_FORMAT_PCM_16;
   }

   int& fileFormat = context.fileFormat;
   fileFormat = sf_format & SF_FORMAT_TYPEMASK;

   {
      wxFile &f = context.f;
      SNDFILE* &sf = context.sf;

      wxString     formatStr;
      SF_INFO      &info = context.info;
      //int          err;

      //This whole operation should not occur while a file is being loaded on OD,
      //(we are worried about reading from a file being written to,) so we block.
      //Furthermore, we need to do this because libsndfile is not threadsafe.
      formatStr = SFCall<wxString>(sf_header_name, fileFormat);

      // Use libsndfile to export file