Class: WSK::Actions::DCShifter

Inherits:
Object
  • Object
show all
Includes:
Maps
Defined in:
lib/WSK/Actions/DCShifter.rb

Instance Method Summary collapse

Methods included from Maps

#apply_map_functions

Instance Method Details

#execute(iInputData, oOutputData) ⇒ Object

Execute

Parameters

  • iInputData (WSK::Model::InputData): The input data

  • oOutputData (Object): The output data to fill

Return

  • Exception: An error, or nil if success



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# File 'lib/WSK/Actions/DCShifter.rb', line 33

def execute(iInputData, oOutputData)
  # The offset, per channel
  # list< Integer >
  lOffsets = nil
  if (@Offset.split('|').size == 1)
    lOffsets = [@Offset.to_i] * iInputData.Header.NbrChannels
  else
    lOffsets = @Offset.split('|').map { |iStrValue| iStrValue.to_i }
  end
  
  # List of functions to apply, per channel
  lMaxValue = 2**(iInputData.Header.NbrBitsPerSample-1) - 1
  lMinValue = -2**(iInputData.Header.NbrBitsPerSample-1)
  lFunctions = []
  lOffsets.each do |iOffset|
    lFunctions << {
      :FunctionType => WSK::Functions::FCTTYPE_PIECEWISE_LINEAR,
      :MinValue => lMinValue,
      :MaxValue => lMaxValue,
      :Points => {
        lMinValue => lMinValue + iOffset,
        lMaxValue => lMaxValue + iOffset
      }
    }
  end
  apply_map_functions(iInputData, oOutputData, lFunctions)

  return nil
end

#get_nbr_samples(iInputData) ⇒ Object

Get the number of samples that will be written. This is called before execute, as it is needed to write the output file. It is possible to give a majoration: it will be padded with silence.

Parameters

  • iInputData (WSK::Model::InputData): The input data

Return

  • Integer: The number of samples to be written



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# File 'lib/WSK/Actions/DCShifter.rb', line 22

def get_nbr_samples(iInputData)
  return iInputData.NbrSamples
end