Locate and position the current Audacity source code, and clear a variety of old junk out of the way into junk-branches

2026-02-09 05:01:57 +01:00 · 2010-01-23 19:44:49 +00:00
commit e74978ba77
1011 changed files with 781704 additions and 0 deletions
--- a/src/commands/CompareAudioCommand.cpp
+++ b/src/commands/CompareAudioCommand.cpp
@@ -0,0 +1,153 @@
+/**********************************************************************
+
+   Audacity - A Digital Audio Editor
+   Copyright 1999-2009 Audacity Team
+   License: wxwidgets
+
+   Dan Horgan
+
+******************************************************************//**
+
+\file CompareAudioCommand.cpp
+\brief Contains definitions for CompareAudioCommand class
+
+\class CompareAudioCommand
+\brief Returns information about the amount of audio that is about a certain
+threshold of difference in two selected tracks
+
+*//*******************************************************************/
+
+#include "CompareAudioCommand.h"
+#include "../Project.h"
+#include "Command.h"
+
+wxString CompareAudioCommandType::BuildName()
+{
+   return wxT("CompareAudio");
+}
+
+void CompareAudioCommandType::BuildSignature(CommandSignature &signature)
+{
+   DoubleValidator *thresholdValidator = new DoubleValidator();
+   signature.AddParameter(wxT("Threshold"), 0.0, thresholdValidator);
+}
+
+Command *CompareAudioCommandType::Create(CommandOutputTarget *target)
+{
+   return new CompareAudioCommand(*this, target);
+}
+
+// Update member variables with project selection data (and validate)
+bool CompareAudioCommand::GetSelection(AudacityProject &proj)
+{
+   // Get the selected time interval
+   mT0 = proj.mViewInfo.sel0;
+   mT1 = proj.mViewInfo.sel1;
+   if (mT0 >= mT1)
+   {
+      Error(wxT("There is no selection!"));
+      return false;
+   }
+
+   // Get the selected tracks and check that there are at least two to
+   // compare
+   SelectedTrackListOfKindIterator iter(Track::Wave, proj.GetTracks());
+   mTrack0 = (WaveTrack*)(iter.First());
+   if (mTrack0 == NULL)
+   {
+      Error(wxT("No tracks selected! Select two tracks to compare."));
+      return false;
+   }
+   mTrack1 = (WaveTrack*)(iter.Next());
+   if (mTrack1 == NULL)
+   {
+      Error(wxT("Only one track selected! Select two tracks to compare."));
+      return false;
+   }
+   if (iter.Next() != NULL)
+   {
+      Status(wxT("More than two tracks selected - only the first two will be compared."));
+   }
+   return true;
+}
+
+double CompareAudioCommand::CompareSample(double value1, double value2)
+{
+   return fabs(value1 - value2);
+}
+
+inline int min(int a, int b)
+{
+   return (a < b) ? a : b;
+}
+
+bool CompareAudioCommand::Apply(CommandExecutionContext context)
+{
+   if (!GetSelection(*context.proj))
+   {
+      return false;
+   }
+
+   wxString msg = wxT("Comparing tracks '");
+   msg += mTrack0->GetName() + wxT("' and '")
+      + mTrack1->GetName() + wxT("'.");
+   Status(msg);
+
+   long errorCount = 0;
+   double errorThreshold = GetDouble(wxT("Threshold"));
+
+   // Initialize buffers for track data to be analyzed
+   int buffSize = min(mTrack0->GetMaxBlockSize(), mTrack1->GetMaxBlockSize());
+   float *buff0 = new float[buffSize];
+   float *buff1 = new float[buffSize];
+
+   // Compare tracks block by block
+   long s0 = mTrack0->TimeToLongSamples(mT0);
+   long s1 = mTrack0->TimeToLongSamples(mT1);
+   long position = s0;
+   long length = s1 - s0;
+   while (position < s1)
+   {
+      // Get a block of data into the buffers
+      sampleCount block = mTrack0->GetBestBlockSize(position);
+      if (position + block > s1)
+      {
+         block = s1 - position;
+      }
+      mTrack0->Get((samplePtr)buff0, floatSample, position, block);
+      mTrack1->Get((samplePtr)buff1, floatSample, position, block);
+
+      int buffPos = 0;
+      for (buffPos = 0; buffPos < block; ++buffPos)
+      {
+         if (CompareSample(buff0[buffPos], buff1[buffPos]) > errorThreshold)
+         {
+            ++errorCount;
+         }
+      }
+
+      position += block;
+      Progress((position - mT0) / length);
+   }
+
+   delete [] buff0;
+   delete [] buff1;
+
+   // Output the results
+   double errorSeconds = mTrack0->LongSamplesToTime(errorCount);
+   Status(wxString::Format(wxT("%i"), errorCount));
+   Status(wxString::Format(wxT("%.4f"), errorSeconds));
+   Status(wxString::Format(wxT("Finished comparison: %i samples (%.3f seconds) exceeded the error threshold of %f."), errorCount, errorSeconds, errorThreshold));
+   return true;
+}
+
+// Indentation settings for Vim and Emacs and unique identifier for Arch, a
+// version control system. Please do not modify past this point.
+//
+// Local Variables:
+// c-basic-offset: 3
+// indent-tabs-mode: nil
+// End:
+//
+// vim: et sts=3 sw=3
+// arch-tag: TBD