ECLBaseCompress Class Reference

ECL waveform compression/decompression to/from the BitStream storage with the BASE algorithm. More...

#include <ECLCompress.h>

Inheritance diagram for ECLBaseCompress:

Public Member Functions
void	compress (BitStream &out, const int *adc) override
	Compress the ECL waveform.
void	uncompress (BitStream &out, int *adc) override
	Decompress the ECL waveform.

Detailed Description

ECL waveform compression/decompression to/from the BitStream storage with the BASE algorithm.

Definition at line 60 of file ECLCompress.h.

Member Function Documentation

compress()

void compress ( BitStream &  out, const int *  adc  )

overridevirtual

Compress the ECL waveform.

Parameters

out	– where we stream the compressed data
adc	– the waveform to compress

Implements ECLCompress.

Definition at line 35 of file ECLCompress.cc.

{
  int amin = adc[0], amax = adc[0];
  for (unsigned int i = 0; i < EclConfiguration::m_nsmp; i++) {
    amax = std::max(amax, adc[i]);
    amin = std::min(amin, adc[i]);
  }
 
  amin &= 0x3ffff;
  out.putNBits(amin, 18);
  unsigned int w = ilog2(amax - amin) + 1;
  w &= 0x1f;
  out.putNBits(w, 5);
 
  for (unsigned int i = 0; i < EclConfiguration::m_nsmp; i++) {
    unsigned int d = adc[i] - amin;
    out.putNBits(d, w);
  }
}

uncompress()

void uncompress ( BitStream &  in, int *  adc  )

overridevirtual

Decompress the ECL waveform.

Parameters

in	– the stream from which we fetch the compressed data
adc	– the decompressed waveform

Implements ECLCompress.

Definition at line 55 of file ECLCompress.cc.

{
  unsigned int amin = out.getNBits(18), w = out.getNBits(5);
  for (unsigned int i = 0; i < EclConfiguration::m_nsmp; i++)
    adc[i] = amin + out.getNBits(w);
}

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

• ecl/digitization/include/ECLCompress.h
• ecl/digitization/src/ECLCompress.cc