Module: Radio::Filter::SetupFir

Included in:
Fir, InterpolateFir, Mix, MixDecimateFir, MixFir, MixInterpolateFir
Defined in:
lib/radio/filters/fir.rb

Instance Method Summary collapse

Instance Method Details

#decimation_fir=(coef) ⇒ Object Also known as: fir= 



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# File 'lib/radio/filters/fir.rb', line 56

def decimation_fir= coef
  if @decimation_fir_orig
    raise "can't grow filter" if coef.size > @decimation_fir_size
  else
    @decimation_fir_pos = 0
    @decimation_fir_size = coef.size
    @decimation_buf = NArray.scomplex @decimation_fir_size
    # decimation allows fractions for digital work
    if Float === @decimation_size
      @decimation_pos = 0.0
    else
      @decimation_pos = 0
    end
  end
  @decimation_fir_orig = coef
  setup_decimation
end

#decimation_mix=(mix) ⇒ Object Also known as: mix= 



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# File 'lib/radio/filters/fir.rb', line 47

def decimation_mix= mix
  @decimation_mix = mix
  @decimation_fir_pos = 0 # sync to mixer
  @decimation_phase, @decimation_inc = 
    new_mixer @decimation_mix, @decimation_size
  setup_decimation if @decimation_fir_orig
end

#interpolation_fir=(coef) ⇒ Object 



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# File 'lib/radio/filters/fir.rb', line 29

def interpolation_fir= coef
  # expand interpolation filter for matrix by padding with 0s
  remainder = coef.size % @interpolation_size
  if remainder > 0
    coef = coef.to_a + [0]*(@interpolation_size-remainder)
  end
  if @interpolation_fir_orig
    raise "can't grow filter" if coef.size > @interpolation_fir_size
  else
    @interpolation_fir_pos = 0
    @interpolation_fir_size = coef.size / @interpolation_size
    @interpolation_buf_f = NArray.sfloat @interpolation_fir_size
    @interpolation_buf_c = NArray.scomplex @interpolation_fir_size
  end
  @interpolation_fir_orig = coef
  setup_interpolation
end

#interpolation_mix=(mix) ⇒ Object 



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# File 'lib/radio/filters/fir.rb', line 21

def interpolation_mix= mix
  @interpolation_mix = mix
  @interpolation_fir_pos = 0 # sync to mixer
  @interpolation_phase, @interpolation_inc = 
    new_mixer @interpolation_mix, @interpolation_size
  setup_interpolation if @interpolation_fir_orig
end