Method addToChain

src/sstv/syncprocessor.cpp:697–767

bool syncProcessor::addToChain(esstvMode mode,  uint fromIdx)
{
  int i;
  double fract;
  quint16 lineSpacing;

  samplesPerLine=getLineLength(mode,modifiedClock);
  
  if(!lineCompare(samplesPerLine,fromIdx,syncArrayIndex,lineSpacing,fract))
  {
    return false;
  }


  if((syncArray[syncArrayIndex].diffStartEnd()<syncWidth*MINSYNCWIDTHRATIO)
     || (syncArray[syncArrayIndex].diffStartEnd()>syncWidth*MAXSYNCWIDTHRATIO)
     || (syncArray[fromIdx].diffStartEnd()<syncWidth*MINSYNCWIDTHRATIO))
  {

    return false;
  }

  if (syncArray[fromIdx].diffStartEnd()>syncWidth*MAXSYNCWIDTHRATIO)
  {
    if(fromIdx!=0 || !syncArray[0].retrace)
    {
      return false;
    }
  }
  if(syncProcesState==MODEDETECT)
  {
    if(lineSpacing>sensitivityArray[sensitivity].maxLineDistanceModeDetect)
    {
      return false;
    }
  }

  bool found=false;
  if(matchArray[mode].count()==0) // we don't have a chain yet
  {
    matchArray[mode].append(new modeMatchList);
    matchArray[mode][0]->append(new smatchEntry(fromIdx,syncArrayIndex,lineSpacing,fract,syncArray[fromIdx].end,syncArray[syncArrayIndex].end));
    //      addToLog(QString("Match: mode=%1,new chain=%2 syncIndex=%3 end=%4").arg(getSSTVModeNameShort(mode)).arg(matchArray[mode].count()-1).arg(syncArrayIndex).arg(syncArray[syncArrayIndex].end),LOGSYNCMATCH);
  }
  else
  {
    // can we append this to an existing chain?
    for(i=0;i<matchArray[mode].count();i++)
    {
      if(matchArray[mode][i]->last()->to==fromIdx)
      {
        if((syncProcesState==INSYNC) && (i==0) )
        {
          currentModeMatchChanged=true;
        }
        matchArray[mode][i]->append(new smatchEntry(fromIdx,syncArrayIndex,lineSpacing,fract,syncArray[fromIdx].end,syncArray[syncArrayIndex].end));
        //              addToLog(QString("Match: mode=%1,chain=%2 syncIndex=%3 end=%4").arg(getSSTVModeNameShort(mode)).arg(i).arg(syncArrayIndex).arg(syncArray[syncArrayIndex].end),LOGSYNCMATCH);
        found=true;