GETBasicFrame.cxx

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#include "GETBasicFrame.h"
 
#include "GETHeaderBase.h"
 
#include <cstdint>
#include <cstring>
#include <istream>
 
GETBasicFrame::GETBasicFrame()
{
   Clear();
}
 
Int_t *GETBasicFrame::GetSample(Int_t agetIdx, Int_t chIdx)
{
   return fSample + GetIndex(agetIdx, chIdx, 0);
}
 
Int_t GETBasicFrame::GetFrameSkip()
{
   return GetFrameSize() - GETBASICFRAMEHEADERSIZE - GetHeaderSkip() - GetItemSize() * GetNItems();
}
 
void GETBasicFrame::Clear(Option_t *)
{
   GETBasicFrameHeader::Clear();
 
   memset(fSample, 0, sizeof(Int_t) * 4 * 68 * 512);
}
 
void GETBasicFrame::Read(ifstream &stream)
{
   Clear();
 
   GETBasicFrameHeader::Read(stream);
 
   if (GetFrameType() == GETFRAMEBASICTYPE1) {
      uint8_t data[4];
      for (Int_t iItem = 0; iItem < GetNItems(); iItem++) {
         stream.read((Char_t *)data, GetItemSize());
 
         UInt_t item = CorrectEndianness(data, 4);
 
         UShort_t agetIdx = ((item & 0xc0000000) >> 30);
         UShort_t chIdx = ((item & 0x3f800000) >> 23);
         UShort_t tbIdx = ((item & 0x007fc000) >> 14);
         UShort_t sample = (item & 0x00000fff);
 
         fSample[GetIndex(agetIdx, chIdx, tbIdx)] = sample;
      }
   } else if (GetFrameType() == GETFRAMEBASICTYPE2) {
      uint8_t data[2];
      for (Int_t iItem = 0; iItem < GetNItems(); iItem++) {
         stream.read((Char_t *)data, GetItemSize());
 
         UShort_t item = CorrectEndianness(data, 2);
 
         UShort_t agetIdx = ((item & 0xc000) >> 14);
         UShort_t chIdx = ((iItem / 8) * 2 + iItem % 2) % 68;
         UShort_t tbIdx = iItem / (68 * 4);
         UShort_t sample = item & 0x0fff;
 
         fSample[GetIndex(agetIdx, chIdx, tbIdx)] = sample;
      }
   }
 
   stream.ignore(GetFrameSkip());
}
 
UInt_t GETBasicFrame::GetIndex(Int_t agetIdx, Int_t chIdx, Int_t tbIdx)
{
   return agetIdx * 68 * 512 + chIdx * 512 + tbIdx;
}