chromaprint-fixed/src/algorithms.coffee

A JavaScript implementation of AcoustID Chromaprint

# Algorithms for chromaprint. These are ripped shamelessly from
# [AcoustID Chromaprint](https://bitbucket.org/acoustid/chromaprint/src)

@chromaprint ?= {}

filterCoefficients = [ 0.25, 0.75, 1, 0.75, 0.25 ]

algorithms =
  1:
    filterCoefficients: filterCoefficients
    interpolate: false
    classifierCoefficients: [
      { f: [0, 0, 3, 15], q: [2.10543, 2.45354, 2.69414] }
      { f: [1, 0, 4, 14], q: [-0.345922, 0.0463746, 0.446251] }
      { f: [1, 4, 4, 11], q: [-0.392132, 0.0291077, 0.443391] }
      { f: [3, 0, 4, 14], q: [-0.192851, 0.00583535, 0.204053] }
      { f: [2, 8, 2, 4],  q: [-0.0771619, -0.00991999, 0.0575406] }
      { f: [5, 6, 2, 15], q: [-0.710437, -0.518954, -0.330402] }
      { f: [1, 9, 2, 16], q: [-0.353724, -0.0189719, 0.289768] }
      { f: [3, 4, 2, 10], q: [-0.128418, -0.0285697, 0.0591791] }
      { f: [3, 9, 2, 16], q: [-0.139052, -0.0228468, 0.0879723] }
      { f: [2, 1, 3, 6],  q: [-0.133562, 0.00669205, 0.155012] }
      { f: [3, 3, 6, 2],  q: [-0.0267, 0.00804829, 0.0459773] }
      { f: [2, 8, 1, 10], q: [-0.0972417, 0.0152227, 0.129003] }
      { f: [3, 4, 4, 14], q: [-0.141434, 0.00374515, 0.149935] }
      { f: [5, 4, 2, 15], q: [-0.64035, -0.466999, -0.285493] }
      { f: [5, 9, 2, 3],  q: [-0.322792, -0.254258, -0.174278] }
      { f: [2, 1, 8, 4],  q: [-0.0741375, -0.00590933, 0.0600357] }
    ]
  2:
    filterCoefficients: filterCoefficients
    interpolate: false
    classifierCoefficients: [
      { f: [0, 4, 3, 15],  q: [1.98215, 2.35817, 2.63523] }
      { f: [4, 4, 6, 15],  q: [-1.03809, -0.651211, -0.282167] }
      { f: [1, 0, 4, 16],  q: [-0.298702, 0.119262, 0.558497] }
      { f: [3, 8, 2, 12],  q: [-0.105439, 0.0153946, 0.135898] }
      { f: [3, 4, 4, 8],   q: [-0.142891, 0.0258736, 0.200632] }
      { f: [4, 0, 3, 5],   q: [-0.826319, -0.590612, -0.368214] }
      { f: [1, 2, 2, 9],   q: [-0.557409, -0.233035, 0.0534525] }
      { f: [2, 7, 3, 4],   q: [-0.0646826, 0.00620476, 0.0784847] }
      { f: [2, 6, 2, 16],  q: [-0.192387, -0.029699, 0.215855] }
      { f: [2, 1, 3, 2],   q: [-0.0397818, -0.00568076, 0.0292026] }
      { f: [5, 10, 1, 15], q: [-0.53823, -0.369934, -0.190235] }
      { f: [3, 6, 2, 10],  q: [-0.124877, 0.0296483, 0.139239] }
      { f: [2, 1, 1, 14],  q: [-0.101475, 0.0225617, 0.231971] }
      { f: [3, 5, 6, 4],   q: [-0.0799915, -0.00729616, 0.063262] }
      { f: [1, 9, 2, 12],  q: [-0.272556, 0.019424, 0.302559] }
      { f: [3, 4, 2, 14],  q: [-0.164292, -0.0321188, 0.0846339] }
    ]
  3:
    filterCoefficients: filterCoefficients
    interpolate: false
    classifierCoefficients: [
      { f: [0, 4, 3, 15],  q: [1.98215, 2.35817, 2.63523] }
      { f: [4, 4, 6, 15],  q: [-1.03809, -0.651211, -0.282167] }
      { f: [1, 0, 4, 16],  q: [-0.298702, 0.119262, 0.558497] }
      { f: [3, 8, 2, 12],  q: [-0.105439, 0.0153946, 0.135898] }
      { f: [3, 4, 4, 8],   q: [-0.142891, 0.0258736, 0.200632] }
      { f: [4, 0, 3, 5],   q: [-0.826319, -0.590612, -0.368214] }
      { f: [1, 2, 2, 9],   q: [-0.557409, -0.233035, 0.0534525] }
      { f: [2, 7, 3, 4],   q: [-0.0646826, 0.00620476, 0.0784847] }
      { f: [2, 6, 2, 16],  q: [-0.192387, -0.029699, 0.215855] }
      { f: [2, 1, 3, 2],   q: [-0.0397818, -0.00568076, 0.0292026] }
      { f: [5, 10, 1, 15], q: [-0.53823, -0.369934, -0.190235] }
      { f: [3, 6, 2, 10],  q: [-0.124877, 0.0296483, 0.139239] }
      { f: [2, 1, 1, 14],  q: [-0.101475, 0.0225617, 0.231971] }
      { f: [3, 5, 6, 4],   q: [-0.0799915, -0.00729616, 0.063262] }
      { f: [1, 9, 2, 12],  q: [-0.272556, 0.019424, 0.302559] }
      { f: [3, 4, 2, 14],  q: [-0.164292, -0.0321188, 0.0846339] }
    ]
  4:
    removeSilence: true
    silenceThreshold: 50

for own k, v of algorithms
  algorithms[Number(k)] = v
algorithms.default = algorithms[2]

@chromaprint.ALGORITHMS = algorithms