Legacy.cpp

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  Legacy.cpp
 
  Dominic Mazzoni
 
*******************************************************************//****************************************************************//*******************************************************************/
 
 
 
#include "Legacy.h"
 
#include <stdlib.h>
#include <string.h>
 
#include <wx/defs.h>
#include <wx/ffile.h>
#include <wx/filefn.h>
#include <wx/textfile.h>
 
#include "AudacityMessageBox.h"
#include "XMLWriter.h"
 
static bool ConvertLegacyTrack(wxTextFile *f, XMLFileWriter &xmlFile)
// may throw
{
   wxString line;
   wxString kind;
 
   kind = (*f)[f->GetCurrentLine()];
 
   if (kind == wxT("WaveTrack")) {
      xmlFile.StartTag(wxT("wavetrack"));
      xmlFile.WriteAttr(wxT("name"), f->GetNextLine());
 
      wxString channel = f->GetNextLine();
      if (channel == wxT("left")) {
         xmlFile.WriteAttr(wxT("channel"), 0);
         line = f->GetNextLine();
      }
      else if (channel == wxT("right")) {
         xmlFile.WriteAttr(wxT("channel"), 1);
         line = f->GetNextLine();
      }
      else if (channel == wxT("mono")) {
         xmlFile.WriteAttr(wxT("channel"), 2);
         line = f->GetNextLine();
      }
      else {
         xmlFile.WriteAttr(wxT("channel"), 2);
         line = channel;
      }
 
      if (line == wxT("linked")) {
         xmlFile.WriteAttr(wxT("linked"), 1);
         line = f->GetNextLine();
      }
 
      if (line != wxT("offset"))
         return false;
      xmlFile.WriteAttr(wxT("offset"), f->GetNextLine());
 
      long envLen;
 
      if (f->GetNextLine() != wxT("EnvNumPoints"))
         return false;
      line = f->GetNextLine();
      line.ToLong(&envLen);
      if (envLen < 0 || envLen > 10000)
         return false;
 
      size_t envStart = f->GetCurrentLine();
      if (f->GetLineCount() < envStart+(2*envLen)+1)
         return false;
 
      f->GoToLine(envStart+(2*envLen));
      if (f->GetNextLine() != wxT("EnvEnd"))
         return false;
      if (f->GetNextLine() != wxT("numSamples"))
         return false;
 
      wxString numSamples = f->GetNextLine();
 
      if (f->GetNextLine() != wxT("rate"))
         return false;
 
      xmlFile.WriteAttr(wxT("rate"), f->GetNextLine());
 
      if (envLen > 0) {
         xmlFile.StartTag(wxT("envelope"));
         xmlFile.WriteAttr(wxT("numpoints"), envLen);
 
         long i;
         for(i=0; i<envLen; i++) {
            xmlFile.StartTag(wxT("controlpoint"));
            xmlFile.WriteAttr(wxT("t"), f->GetLine(envStart + 2*i + 1));
            xmlFile.WriteAttr(wxT("val"), f->GetLine(envStart + 2*i + 2));
            xmlFile.EndTag(wxT("controlpoint"));
         }
 
         xmlFile.EndTag(wxT("envelope"));
      }
 
      if (f->GetNextLine() != wxT("numBlocks"))
         return false;
      long numBlocks;
      line = f->GetNextLine();
      line.ToLong(&numBlocks);
 
      if (numBlocks < 0 || numBlocks > 131072)
         return false;
 
      xmlFile.StartTag(wxT("sequence"));
      xmlFile.WriteAttr(wxT("maxsamples"), 524288);
      xmlFile.WriteAttr(wxT("sampleformat"), 131073);
      xmlFile.WriteAttr(wxT("numsamples"), numSamples);
 
      long b;
      for(b=0; b<numBlocks; b++) {
         wxString start;
         wxString len;
         wxString name;
 
         if (f->GetNextLine() != wxT("Block start"))
            return false;
         start = f->GetNextLine();
         if (f->GetNextLine() != wxT("Block len"))
            return false;
         len = f->GetNextLine();
         if (f->GetNextLine() != wxT("Block info"))
            return false;
         name = f->GetNextLine();
 
         xmlFile.StartTag(wxT("waveblock"));
         xmlFile.WriteAttr(wxT("start"), start);
 
         xmlFile.StartTag(wxT("legacyblockfile"));
         if (name == wxT("Alias")) {
            wxString aliasPath = f->GetNextLine();
            wxString localLen = f->GetNextLine();
            wxString aliasStart = f->GetNextLine();
            wxString aliasLen = f->GetNextLine();
            wxString aliasChannel = f->GetNextLine();
            wxString localName = f->GetNextLine();
 
            xmlFile.WriteAttr(wxT("name"), localName);
            xmlFile.WriteAttr(wxT("alias"), 1);
            xmlFile.WriteAttr(wxT("aliaspath"), aliasPath);
 
            // This was written but not read again?
            xmlFile.WriteAttr(wxT("aliasstart"), aliasStart);
 
            xmlFile.WriteAttr(wxT("aliaslen"), aliasLen);
            xmlFile.WriteAttr(wxT("aliaschannel"), aliasChannel);
            xmlFile.WriteAttr(wxT("summarylen"), localLen);
            xmlFile.WriteAttr(wxT("norms"), 1);
         }
         else {
            xmlFile.WriteAttr(wxT("name"), name);
            xmlFile.WriteAttr(wxT("len"), len);
            xmlFile.WriteAttr(wxT("summarylen"), 8244);
            xmlFile.WriteAttr(wxT("norms"), 1);
         }
         xmlFile.EndTag(wxT("legacyblockfile"));
 
         xmlFile.EndTag(wxT("waveblock"));
      }
 
      xmlFile.EndTag(wxT("sequence"));
      xmlFile.EndTag(wxT("wavetrack"));
 
      return true;
   }
   else if (kind == wxT("LabelTrack")) {
      line = f->GetNextLine();
      if (line != wxT("NumMLabels"))
         return false;
 
      long numLabels, l;
 
      line = f->GetNextLine();
      line.ToLong(&numLabels);
      if (numLabels < 0 || numLabels > 1000000)
         return false;
 
      xmlFile.StartTag(wxT("labeltrack"));
      xmlFile.WriteAttr(wxT("name"), wxT("Labels"));
      xmlFile.WriteAttr(wxT("numlabels"), numLabels);
 
      for(l=0; l<numLabels; l++) {
         wxString t, title;
 
         t = f->GetNextLine();
         title = f->GetNextLine();
 
         xmlFile.StartTag(wxT("label"));
         xmlFile.WriteAttr(wxT("t"), t);
         xmlFile.WriteAttr(wxT("title"), title);
         xmlFile.EndTag(wxT("label"));
      }
 
      xmlFile.EndTag(wxT("labeltrack"));
 
      line = f->GetNextLine();
      if (line != wxT("MLabelsEnd"))
         return false;
 
      return true;
   }
   else if (kind == wxT("NoteTrack")) {
      // Just skip over it - they didn't even work in version 1.0!
 
      do {
         line = f->GetNextLine();
         if (line == wxT("WaveTrack") ||
             line == wxT("NoteTrack") ||
             line == wxT("LabelTrack") ||
             line == wxT("EndTracks")) {
            f->GoToLine(f->GetCurrentLine()-1);
            return true;
         }
      } while (f->GetCurrentLine() < f->GetLineCount());
 
      return false;
   }
   else
      return false;
}
 
bool ConvertLegacyProjectFile(const wxFileName &filename)
{
   wxTextFile f;
 
   const wxString name = filename.GetFullPath();
   f.Open( name );
   if (!f.IsOpened())
      return false;
 
   return GuardedCall< bool >( [&] {
      XMLFileWriter xmlFile{ name, XO("Error Converting Legacy Project File") };
 
      xmlFile.Write(wxT("<?xml version=\"1.0\"?>\n"));
 
      wxString label;
      wxString value;
 
      if (f.GetFirstLine() != wxT("AudacityProject"))
         return false;
      if (f.GetNextLine() != wxT("Version"))
         return false;
      if (f.GetNextLine() != wxT("0.95"))
         return false;
      if (f.GetNextLine() != wxT("projName"))
         return false;
 
      xmlFile.StartTag(wxT("audacityproject"));
      xmlFile.WriteAttr(wxT("projname"), f.GetNextLine());
      xmlFile.WriteAttr(wxT("version"), wxT("1.1.0"));
      xmlFile.WriteAttr(wxT("audacityversion"),AUDACITY_VERSION_STRING);
 
      label = f.GetNextLine();
      while (label != wxT("BeginTracks")) {
         xmlFile.WriteAttr(label, f.GetNextLine());
         label = f.GetNextLine();
      }
 
      label = f.GetNextLine();
      while (label != wxT("EndTracks")) {
         bool success = ConvertLegacyTrack(&f, xmlFile);
         if (!success)
            return false;
         label = f.GetNextLine();
      }
 
      // Close original before Commit() tries to overwrite it.
      f.Close();
 
      xmlFile.EndTag(wxT("audacityproject"));
      xmlFile.Commit();
 
      ::AudacityMessageBox(
         XO(
"Converted a 1.0 project file to the new format.\nThe old file has been saved as '%s'")
            .Format( xmlFile.GetBackupName() ),
         XO("Opening Audacity Project"));
 
      return true;
   } );
}