mirror of
https://github.com/cookiengineer/audacity
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24 lines
886 B
Plaintext
24 lines
886 B
Plaintext
(RESON-ALG
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(NAME "reson")
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(ARGUMENTS ("sound_type" "s") ("double" "hz") ("double" "bw")
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("int" "normalization"))
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(START (MIN s))
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(TERMINATE (MIN s))
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(LOGICAL-STOP (MIN s))
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(STATE ("double" "c3" "exp(bw * -PI2 / s->sr)")
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("double" "c3p1" "susp->c3 + 1.0")
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("double" "c3t4" "susp->c3 * 4.0")
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("double" "omc3" "1.0 - susp->c3")
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("double" "c2" "susp->c3t4 * cos(hz * PI2 / s->sr) / susp->c3p1")
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("double" "c1" "(normalization == 0 ? 1.0 :
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(normalization == 1 ? susp->omc3 * sqrt(1.0 - susp->c2 * susp->c2 / susp->c3t4) :
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sqrt(susp->c3p1 * susp->c3p1 - susp->c2 * susp->c2) * susp->omc3 / susp->c3p1))")
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("double" "y1" "0.0")
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("double" "y2" "0.0"))
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(CONSTANT "c1" "c2" "c3")
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(INNER-LOOP "{ double y0 = c1 * s + c2 * y1 - c3 * y2;
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output = (sample_type) y0;
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y2 = y1; y1 = y0; }")
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)
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