LegacyBlockFile.h

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  LegacyBlockFile.h
 
  Dominic Mazzoni
 
**********************************************************************/
 
#ifndef __AUDACITY_LEGACY_BLOCKFILE__
#define __AUDACITY_LEGACY_BLOCKFILE__
 
#include "../BlockFile.h"
 
class wxFileName;
 
void ComputeLegacySummaryInfo(const wxFileName &fileName,
                              size_t summaryLen,
                              sampleFormat format,
                              SummaryInfo *info,
                              bool noRMS,bool Silent,
                              float *min, float *max, float *rms);
 
 
//
// This class supports loading BlockFiles in one of the old
// Audacity BlockFile formats (versions 0.98 through 1.0, or
// versions 1.1.0 through 1.1.2).  You can load a BlockFile
// in this format, and you can save information about it
// back to disk, but you can't create a NEW one from NEW
// sample data.
//
class LegacyBlockFile final : public BlockFile {
 public:
 
   // Constructor / Destructor
 
   LegacyBlockFile(wxFileNameWrapper &&existingFile,
                   sampleFormat format,
                   size_t summaryLen,
                   size_t len,
                   bool noRMS);
   virtual ~LegacyBlockFile();
 
   // Reading
 
   bool ReadSummary(ArrayOf<char> &data) override;
   size_t ReadData(samplePtr data, sampleFormat format,
                        size_t start, size_t len, bool mayThrow) const override;
 
   BlockFilePtr Copy(wxFileNameWrapper &&newFileName) override;
   void SaveXML(XMLWriter &xmlFile) override;
   DiskByteCount GetSpaceUsage() const override;
   void Recover() override;
 
   static BlockFilePtr BuildFromXML(const FilePath &dir, const wxChar **attrs,
                                  size_t len,
                                  sampleFormat format);
 
 protected:
   sampleFormat mFormat;
};
 
#endif // __AUDACITY_LEGACY_BLOCKFILE__