ImportUtils.cpp

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  ImportUtils.cpp
 
  Dominic Mazzoni
 
  Vitaly Sverchinsky split from ImportPlugin.cpp
 
**********************************************************************/
 
#include "ImportUtils.h"
 
#include "WaveTrack.h"
#include "QualitySettings.h"
#include "BasicUI.h"
 
sampleFormat ImportUtils::ChooseFormat(sampleFormat effectiveFormat)
{
   // Consult user preference
   auto defaultFormat = QualitySettings::SampleFormatChoice();
 
   // Don't choose format narrower than effective or default
   auto format = std::max(effectiveFormat, defaultFormat);
 
   // But also always promote 24 bits to float
   if (format > int16Sample)
      format = floatSample;
 
   return format;
}
 
WaveTrack::Holder
ImportUtils::NewWaveTrack(WaveTrackFactory &trackFactory,
                          unsigned nChannels,
                          sampleFormat effectiveFormat,
                          double rate)
{
   return trackFactory.Create(nChannels, ChooseFormat(effectiveFormat), rate);
}
 
void ImportUtils::ShowMessageBox(const TranslatableString &message, const TranslatableString& caption)
{
   BasicUI::ShowMessageBox(message,
                           BasicUI::MessageBoxOptions().Caption(caption));
}
 
void ImportUtils::FinalizeImport(TrackHolders& outTracks, const std::vector<WaveTrack::Holder>& importedStreams)
{
   for(auto& stream : importedStreams)
      FinalizeImport(outTracks, *stream);
}
 
void ImportUtils::FinalizeImport(TrackHolders& outTracks, TrackList &&trackList)
{
   if(trackList.empty())
      return;
 
   for(const auto track : trackList.Any<WaveTrack>())
      track->Flush();
   
   while (!trackList.empty())
      outTracks.push_back(trackList.DetachFirst());
}
 
void ImportUtils::FinalizeImport(TrackHolders& outTracks, WaveTrack &track)
{
   track.Flush();
   outTracks.push_back(track.shared_from_this());
}
 
void ImportUtils::ForEachChannel(TrackList& trackList, const std::function<void(WaveChannel&)>& op)
{
   for(auto track : trackList.Any<WaveTrack>())
   {
      for(auto channel : track->Channels())
      {
         op(*channel);
      }
   }
}
 
void ImportUtils::ForEachChannel(WaveTrack &track, const std::function<void(WaveChannel&)>& op)
{
   for(auto channel : track.Channels())
   {
      op(*channel);
   }
}