C++ (Cpp) WaveClip::SetSamples Examples

Example #1

File: WaveTrack.cpp Project: Kirushanr/audacity

bool WaveTrack::Set(samplePtr buffer, sampleFormat format,
                    longSampleCount start, sampleCount len)
{
   bool result = true;

   for (WaveClipList::Node* it=GetClipIterator(); it; it=it->GetNext())
   {
      WaveClip *clip = it->GetData();

      longSampleCount clipStart = clip->GetStartSample();
      longSampleCount clipEnd = clip->GetEndSample();

      if (clipEnd > start && clipStart < start+len)
      {
         // Clip sample region and Get/Put sample region overlap
         sampleCount samplesToCopy = start+len - clipStart;
         if (samplesToCopy > clip->GetNumSamples())
            samplesToCopy = clip->GetNumSamples();
         longSampleCount inclipDelta = 0;
         longSampleCount startDelta = clipStart - start;
         if (startDelta < 0)
         {
            inclipDelta = -startDelta; // make positive value
            samplesToCopy -= inclipDelta;
            startDelta = 0;
         }

         if (!clip->SetSamples((samplePtr)(((char*)buffer)+startDelta*SAMPLE_SIZE(format)),
                               format, inclipDelta, samplesToCopy))
         {
            wxASSERT(false); // should always work
            return false;
         }
         clip->MarkChanged();
      }
   }

   return result;
}