Class: WSK::Actions::Compare

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

Instance Method Summary collapse

Methods included from Maps

#apply_map_functions

Methods included from Common

#accessInputWaveFile, #accessOutputWaveFile, #getWaveFileAccesses, #parsePlugins, #readDuration, #readFFTProfile, #readThresholds, #val2db

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/Compare.rb', line 59

def execute(iInputData, oOutputData)
  @NbrBitsPerSample = iInputData.Header.NbrBitsPerSample
  @NbrChannels = iInputData.Header.NbrChannels
  if (@GenMap == 1)
    # We want to generate the map
    @DistortionMap = [nil]*(2**@NbrBitsPerSample)
  else
    @DistortionMap = nil
  end
  # Measure the cumulative errors
  @CumulativeErrors = 0
  @MaxValue = 2**(@NbrBitsPerSample-1)-1
  @MinValue = -2**(@NbrBitsPerSample-1)
  # Get the second input file
  rError = accessInputWaveFile(@InputFileName2) do |iInputHeader2, iInputData2|
    # Loop on both files.
    # !!! We count on the same buffer size for both files.
    require 'WSK/ArithmUtils/ArithmUtils'
    @ArithmUtils = WSK::ArithmUtils::ArithmUtils.new
    # Initialize buffers
    lNbrSamplesProcessed = 0
    iInputData.each_raw_buffer do |iRawBuffer, iNbrSamples, iNbrChannels|
      break
    end
    lRawBuffer1, lNbrSamples1, lNbrChannels = iInputData.get_current_raw_buffer
    iInputData2.each_raw_buffer do |iRawBuffer, iNbrSamples, iNbrChannels|
      break
    end
    lRawBuffer2, lNbrSamples2, lNbrChannels = iInputData2.get_current_raw_buffer
    while ((lRawBuffer1 != nil) or
           (lRawBuffer2 != nil))
      if (lRawBuffer1 == nil)
        oOutputData.pushRawBuffer(lRawBuffer2)
        lNbrSamplesProcessed += lNbrSamples2
        if (lNbrSamplesProcessed == @TotalNbrSamples)
          lRawBuffer2 = nil
        end
      elsif (lRawBuffer2 == nil)
        computeInverseMap
        oOutputData.pushRawBuffer(@ArithmUtils.applyMap(@InverseMap, lRawBuffer1, @NbrBitsPerSample, lNbrSamples1))
        lNbrSamplesProcessed += lNbrSamples1
        if (lNbrSamplesProcessed == @TotalNbrSamples)
          lRawBuffer1 = nil
        end
      elsif (lNbrSamples1 == lNbrSamples2)
        lOutputBuffer, lCumulativeErrors = @ArithmUtils.compareBuffers(
          lRawBuffer1,
          lRawBuffer2,
          @NbrBitsPerSample,
          @NbrChannels,
          lNbrSamples1,
          @Coeff,
          @DistortionMap
        )
        oOutputData.pushRawBuffer(lOutputBuffer)
        @CumulativeErrors += lCumulativeErrors
        lNbrSamplesProcessed += lNbrSamples1
        if (lNbrSamplesProcessed == @TotalNbrSamples)
          lRawBuffer1 = nil
          lRawBuffer2 = nil
        end
      elsif (lNbrSamples1 > lNbrSamples2)
        lOutputBuffer, lCumulativeErrors = @ArithmUtils.compareBuffers(
          lRawBuffer1[0..lRawBuffer2.size-1],
          lRawBuffer2,
          @NbrBitsPerSample,
          @NbrChannels,
          lNbrSamples1,
          @Coeff,
          @DistortionMap
        )
        oOutputData.pushRawBuffer(lOutputBuffer)
        @CumulativeErrors += lCumulativeErrors
        # Write remaining buffer (-Buffer1)
        computeInverseMap
        oOutputData.pushRawBuffer(@ArithmUtils.applyMap(@InverseMap, lRawBuffer1[lRawBuffer2.size..-1], @NbrBitsPerSample, lNbrSamples2 - lNbrSamples1))
        # Buffer2 is finished
        lRawBuffer2 = nil
        lNbrSamplesProcessed += lNbrSamples1
      else
        lOutputBuffer, lCumulativeErrors = @ArithmUtils.compareBuffers(
          lRawBuffer1,
          lRawBuffer2[0..lRawBuffer1.size-1],
          @NbrBitsPerSample,
          @NbrChannels,
          lNbrSamples1,
          @Coeff,
          @DistortionMap
        )
        oOutputData.pushRawBuffer(lOutputBuffer)
        @CumulativeErrors += lCumulativeErrors
        # Write remaining buffer (Buffer2)
        oOutputData.pushRawBuffer(lRawBuffer2[lRawBuffer1.size..-1])
        # Buffer1 is finished
        lRawBuffer1 = nil
        lNbrSamplesProcessed += lNbrSamples2
      end
      # Read next buffers if they are not finished
      if (lRawBuffer1 != nil)
        iInputData.each_raw_buffer(lNbrSamplesProcessed) do |iRawBuffer, iNbrSamples, iNbrChannels|
          break
        end
        lRawBuffer1, lNbrSamples1, lNbrChannels = iInputData.get_current_raw_buffer
      end
      if (lRawBuffer2 != nil)
        iInputData2.each_raw_buffer(lNbrSamplesProcessed) do |iRawBuffer, iNbrSamples, iNbrChannels|
          break
        end
        lRawBuffer2, lNbrSamples2, lNbrChannels = iInputData2.get_current_raw_buffer
      end
    end
  end
  if (@DistortionMap != nil)
    # Write the distortion map
    log_info 'Generate distortion map in distortion.diffmap'
    File.open('distortion.diffmap', 'wb') do |oFile|
      oFile.write(Marshal.dump(@DistortionMap))
    end
    log_info 'Generate invert map in invert.map'
    # We want to spot the values that are missing, and the duplicate values
    lInvertMap = [nil]*(2**@NbrBitsPerSample)
    (@MinValue .. @MaxValue).each do |iValue|
      if (@DistortionMap[iValue] == nil)
        log_warn "Value #{iValue} was not part of the input file"
      else
        lRecordedValue = iValue + @DistortionMap[iValue]
        if (lInvertMap[lRecordedValue] == nil)
          lInvertMap[lRecordedValue] = iValue
        else
          if (iValue.abs < lInvertMap[lRecordedValue].abs)
            log_warn "Recorded value #{lRecordedValue} is used for both input values #{iValue} and #{lInvertMap[lRecordedValue]}. Setting it to #{iValue}."
            lInvertMap[lRecordedValue] = iValue
          else
            log_warn "Recorded value #{lRecordedValue} is used for both input values #{iValue} and #{lInvertMap[lRecordedValue]}. Keeping it to #{lInvertMap[lRecordedValue]}."
          end
        end
      end
    end
    (@MinValue .. @MaxValue).each do |iValue|
      if (lInvertMap[iValue] == nil)
        log_warn "Missing value that has never been recorded: #{iValue}"
      end
    end
    File.open('invert.map', 'wb') do |oFile|
      oFile.write(Marshal.dump(lInvertMap))
    end
  end
  puts "Cumulative errors: #{@CumulativeErrors} (#{Float(@CumulativeErrors*100)/Float(iInputData.NbrSamples*(2**@NbrBitsPerSample))} %)"

  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/Compare.rb', line 23

def get_nbr_samples(iInputData)
  rNbrSamples = iInputData.NbrSamples

  # Get the second input file
  lError = accessInputWaveFile(@InputFileName2) do |iInputHeader2, iInputData2|
    rSubError = nil
    # First check that headers are the same
    if (iInputHeader2 != iInputData.Header)
      rSubError = RuntimeError.new("Mismatch headers: First input file: #{iInputData.Header.inspect} Second input file: #{iInputHeader2.inspect}")
    end
    # Then we will return the maximal samples
    if (iInputData2.NbrSamples > iInputData.NbrSamples)
      log_warn "Second file has more samples (#{iInputData2.NbrSamples} > #{iInputData.NbrSamples})."
      rNbrSamples = iInputData2.NbrSamples
    elsif (iInputData2.NbrSamples < iInputData.NbrSamples)
      log_warn "Second file has less samples (#{iInputData2.NbrSamples} < #{iInputData.NbrSamples})."
    else
      log_info 'Files have the same number of samples.'
    end
    next rSubError
  end
  if (lError != nil)
    raise lError
  end
  @TotalNbrSamples = rNbrSamples

  return rNbrSamples
end