80 lines
1.4 KiB
C++
80 lines
1.4 KiB
C++
// including null-terminator!
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#define PARAM_NAME_LEN 25
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// TOOD: dump enums in param namespace
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typedef enum {
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SCALE_FLOAT,
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SCALE_INT,
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SCALE_TOGGLE,
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SCALE_DB,
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SCALE_LOG,
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SCALE_HZ
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} param_scale;
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typedef enum {
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DEFAULT_0,
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DEFAULT_1,
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DEFAULT_100,
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DEFAULT_440,
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DEFAULT_MIN,
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DEFAULT_LOW, // 25%
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DEFAULT_HALF, // 50%
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DEFAULT_HIGH, // 75%
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DEFAULT_MAX
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} param_default;
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struct Param {
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char name[PARAM_NAME_LEN];
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float value, min, max;
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param_scale scale;
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param_default def;
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Param()
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{}
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/*
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Param(
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char *name, float min, float max,
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param_scale scale, param_default def)
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: name(name), min(min), max(max), scale(scale), def(def)
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{
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reset()
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}
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*/
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void
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set(float percent)
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{
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if (scale >= SCALE_LOG)
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value = exp(percent*(log(max/min)))*min;
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else
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value = percent*(max - min) + min;
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}
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float
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get()
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{
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if (scale >= SCALE_LOG)
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return log(min/value)/log(min/max);
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else
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return (min - value)/(min - max);
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}
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void
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reset()
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{
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switch (def) {
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case DEFAULT_0: value = 0; break;
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case DEFAULT_1: value = 1; break;
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case DEFAULT_100: value = 100; break;
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case DEFAULT_440: value = 440; break;
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case DEFAULT_MIN: value = min; break;
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case DEFAULT_LOW: set(0.25); break;
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case DEFAULT_HALF: set(0.5); break;
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case DEFAULT_HIGH: set(0.75); break;
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case DEFAULT_MAX: value = max; break;
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}
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}
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};
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