Class: WSK::Actions::Multiply

Inherits:
Object
  • Object
show all
Includes:
Maps
Defined in:
lib/WSK/Actions/Multiply.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/Multiply.rb', line 33

def execute(iInputData, oOutputData)
  rError = nil

  lCoeff = nil
  lMatch = @Coeff.match(/^(.*)db$/)
  if (lMatch == nil)
    lMatch = @Coeff.match(/^(\d*)\/(\d*)$/)
    if (lMatch == nil)
      log_err "Incorrect coefficient: #{@Coeff} is not in the form X/Y or in the form Xdb"
      rError = RuntimeError.new("Incorrect coefficient: #{@Coeff} is not in the form X/Y or in the form Xdb")
    else
      lNum, lDenom = lMatch[1..2].map { |iStrValue| iStrValue.to_i }
      lCoeff = Rational(lNum, lDenom)
    end
  else
    lCoeff = 2**(lMatch[1].to_f/6)
  end

  if (rError == nil)
    lMaxValue = 2**(iInputData.Header.NbrBitsPerSample-1) - 1
    lMinValue = -2**(iInputData.Header.NbrBitsPerSample-1)
    lFunction = {
      :FunctionType => WSK::Functions::FCTTYPE_PIECEWISE_LINEAR,
      :MinValue => lMinValue,
      :MaxValue => lMaxValue,
      :Points => {
        lMinValue => (lMinValue*lCoeff).to_i,
        lMaxValue => (lMaxValue*lCoeff).to_i
      }
    }
    apply_map_functions(iInputData, oOutputData, [lFunction]*iInputData.Header.NbrChannels)
  end

  return rError
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/Multiply.rb', line 22

def get_nbr_samples(iInputData)
  return iInputData.NbrSamples
end