Public Member Functions
	Packing (const int row_w, const int column_w, const int time_w, const int adc_w)
Public Attributes
PackedDigiType	adc_mask
int	adc_shift
int	adc_width
PackedDigiType	column_mask
int	column_shift
int	column_width
int	max_adc
int	max_column
int	max_row
PackedDigiType	row_mask
int	row_shift
int	row_width
PackedDigiType	time_mask
int	time_shift

Detailed Description

Pack the pixel information to use less memory

Definition at line 27 of file PixelChannelIdentifier.h.

Constructor & Destructor Documentation

PixelChannelIdentifier::Packing::Packing	(	const int	row_w,
		const int	column_w,
		const int	time_w,
		const int	adc_w
	)

Definition at line 9 of file PixelChannelIdentifier.cc.

References adc_mask, adc_shift, column_mask, column_shift, gather_cfg::cout, max_adc, max_column, max_row, row_mask, row_shift, time_mask, and time_shift.

                                                               :
  row_width(row_w), column_width(column_w), adc_width(adc_w) 
{
  // Constructor: pre-computes masks and shifts from field widths
  // Order of fields (from right to left) is
  // row, column, time, adc count.

  if ( row_w+column_w+time_w+adc_w != 32) {
    std::cout << std::endl << "Warning in PixelDigi::Packing constructor:" 
         << "sum of field widths != 32" << std::endl;
  }
  // Fields are counted from right to left!

  row_shift     = 0;
  column_shift  = row_shift + row_w;
  time_shift    = column_shift + column_w;
  adc_shift     = time_shift + time_w;
  
  row_mask     = ~(~0 << row_w);
  column_mask  = ~(~0 << column_w);
  time_mask    = ~(~0 << time_w);
  adc_mask     = ~(~0 << adc_w);

  max_row = row_mask;
  max_column = column_mask;
  max_adc = adc_mask;

}