Re: [vdr] VDR-1.3.41: speedup for cVideoRepacker

Reinhard Nissl wrote:

+bool cVideoRepacker::ScanDataForStartCodeFast(const uchar *&Data, const uchar *Limit) +{

• Limit--;
• while (Data < Limit) {

•    if (*Data > 0x01)
  

•       Data += 3;
  

•    else if (*Data == 0x00)
  

•       Data++;
  

•    else if (Data[-2] != 0x00 || Data[-1] != 0x00)
  

•       Data += 3;
  

•    else {
  

•       scanner = 0x00000100 | *++Data;
  

•       return true;
  

•       }
  

•    }
  

Did you consider using memchr()? e.g. something like ... while (Data < Limit) { Data = memchr(Data, 0x01, Limit - Data); if (Data == NULL) break; if (Data[-2] != 0x00 || Data[-1] != 0x00) Data += 3; ...

It makes no noticeable difference on my AMD64 machine (<1%), but maybe it is worth trying on your EPIA?

Jon