Module: DTW::Bands

Defined in:
lib/dtwrb/bands.rb,
sig/dtwrb.rbs

Defined Under Namespace

Modules: Unconstrained Classes: SakoeChiba, Slanted

Constant Summary collapse

DEFAULT_RATIO =

Admits warping of up to a quarter of the longer sequence, the usual setting for speech.

Returns:

  • (::Float) 
0.25
DEFAULT =

Returns:

SakoeChiba.new(ratio: DEFAULT_RATIO)
SLANTED =

Returns:

Slanted.new(ratio: DEFAULT_RATIO)

Class Method Summary collapse

Class Method Details

.resolve(band) ⇒ _Band

Parameters:

  • (band)

Returns:



69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
 
# File 'lib/dtwrb/bands.rb', line 69

def resolve(band)
  case band
  when Numeric
    SakoeChiba.new(ratio: band)
  when nil, :unconstrained
    Unconstrained
  when :sakoe_chiba
    DEFAULT
  when :slanted
    SLANTED
  else
    return band if band.respond_to?(:radius)

    raise(
      UnknownStrategyError,
      "unknown band #{band.inspect}: expected a numeric Sakoe-Chiba ratio, :sakoe_chiba, " \
        ":slanted, :unconstrained or an object responding to #radius"
    )
  end
end