LVL1::QuadLinear Class Reference

QuadLinear encoding is used for transmission of ET/Ex/Ey sums from JEM to CMM. More...

#include <QuadLinear.h>

Collaboration diagram for LVL1::QuadLinear:

Static Public Member Functions
static unsigned int	Compress (int Et)
	Compress data. More...
static unsigned int	Expand (int Code)
	Uncompress data. More...

Static Private Attributes
static const unsigned int	m_mask = 0x3F
	Mask to select 6-bit field. More...
static const int	m_nRanges = 4
	Number of ET ranges to encode in. More...
static const int	m_nShift = 2
	Number of bits to shift by in each step. More...
static const int	m_Offset = 6
	Offset for compression code. More...

Detailed Description

QuadLinear encoding is used for transmission of ET/Ex/Ey sums from JEM to CMM.

This class compresses/uncompresses 8 bit ET (JEM energy sums) to/from quad linear scale

Todo:

this should probably be a static class.

Definition at line 29 of file QuadLinear.h.

Member Function Documentation

Compress()

unsigned int LVL1::QuadLinear::Compress ( int  Et )

static

Compress data.

Definition at line 21 of file QuadLinear.cxx.

                                      {
    if ( code <= m_mask ) {
      quadEt = code + (i<<m_Offset);
      break;
    }
    code >>= m_nShift;
  }
  return quadEt;
}
 
unsigned int LVL1::QuadLinear::Expand(int Code) {
 
  // Compressed codes are unsigned. Calling function should keep track of sign   
  int range = Code >> m_Offset;

Expand()

unsigned int LVL1::QuadLinear::Expand ( int  Code )

static

Uncompress data.

Definition at line 37 of file QuadLinear.cxx.

Member Data Documentation

m_mask

const unsigned int LVL1::QuadLinear::m_mask = 0x3F

staticprivate

Mask to select 6-bit field.

Definition at line 44 of file QuadLinear.h.

m_nRanges

const int LVL1::QuadLinear::m_nRanges = 4

staticprivate

Number of ET ranges to encode in.

Definition at line 46 of file QuadLinear.h.

m_nShift

const int LVL1::QuadLinear::m_nShift = 2

staticprivate

Number of bits to shift by in each step.

Definition at line 48 of file QuadLinear.h.

m_Offset

const int LVL1::QuadLinear::m_Offset = 6

staticprivate

Offset for compression code.

Definition at line 50 of file QuadLinear.h.

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The documentation for this class was generated from the following files:

• QuadLinear.h
• QuadLinear.cxx