C++ (Cpp) WaveClip::Resample Examples

Example #1

File: WaveClip.cpp Project: tuanmasterit/audacity

bool WaveClip::Paste(double t0, WaveClip* other)
{
   WaveClip* pastedClip;

   bool clipNeedsResampling = other->mRate != mRate;

   if (clipNeedsResampling)
   {
      // The other clip's rate is different to our's, so resample
      pastedClip = new WaveClip(*other, mSequence->GetDirManager());
      if (!pastedClip->Resample(mRate))
      {
         delete pastedClip;
         return false;
      }
   } else
   {
      // No resampling needed, just use original clip without making a copy
      pastedClip = other;
   }

   sampleCount s0;
   TimeToSamplesClip(t0, &s0);

   // Force sample formats to match.
   if (pastedClip->mSequence->GetSampleFormat() != mSequence->GetSampleFormat())
      pastedClip->ConvertToSampleFormat(mSequence->GetSampleFormat());

   bool result = false;
   if (mSequence->Paste(s0, pastedClip->mSequence))
   {
      MarkChanged();
      mEnvelope->Paste((double)s0/mRate + mOffset, pastedClip->mEnvelope);
      mEnvelope->RemoveUnneededPoints();
      OffsetCutLines(t0, pastedClip->GetEndTime() - pastedClip->GetStartTime());
      
      // Paste cut lines contained in pasted clip
      for (WaveClipList::compatibility_iterator it = pastedClip->mCutLines.GetFirst(); it; it=it->GetNext())
      {
         WaveClip* cutline = it->GetData();
         WaveClip* newCutLine = new WaveClip(*cutline,
                                             mSequence->GetDirManager());
         newCutLine->Offset(t0 - mOffset);
         mCutLines.Append(newCutLine);
      }
      
      result = true;
   }
   
   if (clipNeedsResampling)
   {
      // Clip was constructed as a copy, so delete it
      delete pastedClip;
   }

   return result;
}