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ParamQuantity.cpp
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ParamQuantity.cpp
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#include <algorithm>
#include <engine/ParamQuantity.hpp>
#include <context.hpp>
#include <engine/Engine.hpp>
#include <string.hpp>
namespace rack {
namespace engine {
engine::Param* ParamQuantity::getParam() {
if (!module)
return NULL;
if (!(0 <= paramId && paramId < (int) module->params.size()))
return NULL;
return &module->params[paramId];
}
void ParamQuantity::setValue(float value) {
if (!module)
return;
value = math::clampSafe(value, getMinValue(), getMaxValue());
if (snapEnabled)
value = std::round(value);
if (smoothEnabled)
APP->engine->setParamSmoothValue(module, paramId, value);
else
APP->engine->setParamValue(module, paramId, value);
}
float ParamQuantity::getValue() {
if (!module)
return 0.f;
// Get smoothing target value regardless of `smoothEnabled`.
// If smoothing is enabled, value is set, and smoothing is then disabled, calling getParamValue() will return the incorrect value.
return APP->engine->getParamSmoothValue(module, paramId);
}
void ParamQuantity::setImmediateValue(float value) {
if (!module)
return;
value = math::clampSafe(value, getMinValue(), getMaxValue());
if (snapEnabled)
value = std::round(value);
APP->engine->setParamValue(module, paramId, value);
}
float ParamQuantity::getImmediateValue() {
if (!module)
return 0.f;
return APP->engine->getParamValue(module, paramId);
}
float ParamQuantity::getMinValue() {
return minValue;
}
float ParamQuantity::getMaxValue() {
return maxValue;
}
float ParamQuantity::getDefaultValue() {
return defaultValue;
}
float ParamQuantity::getDisplayValue() {
float v = getValue();
if (displayBase == 0.f) {
// Linear
// v is unchanged
}
else if (displayBase < 0.f) {
// Logarithmic
v = std::log(v) / std::log(-displayBase);
}
else {
// Exponential
v = std::pow(displayBase, v);
}
return v * displayMultiplier + displayOffset;
}
void ParamQuantity::setDisplayValue(float displayValue) {
// Handle displayOffset
float v = displayValue - displayOffset;
// Handle displayMultiplier
if (displayMultiplier == 0.f)
v = 0.f;
else
v /= displayMultiplier;
// Handle displayBase
if (displayBase == 0.f) {
// Linear
// v is unchanged
}
else if (displayBase < 0.f) {
// Logarithmic
v = std::pow(-displayBase, v);
}
else {
// Exponential
v = std::log(v) / std::log(displayBase);
}
if (std::isnan(v))
return;
// Set the value directly without smoothing
setImmediateValue(v);
}
int ParamQuantity::getDisplayPrecision() {
return displayPrecision;
}
std::string ParamQuantity::getDisplayValueString() {
return Quantity::getDisplayValueString();
}
void ParamQuantity::setDisplayValueString(std::string s) {
Quantity::setDisplayValueString(s);
}
std::string ParamQuantity::getLabel() {
if (name == "")
return string::f("#%d", paramId + 1);
return name;
}
std::string ParamQuantity::getUnit() {
return unit;
}
void ParamQuantity::reset() {
setImmediateValue(getDefaultValue());
}
void ParamQuantity::randomize() {
if (!isBounded())
return;
if (snapEnabled) {
// Randomize inclusive of the maximum value
float value = math::rescale(random::uniform(), 0.f, 1.f, getMinValue(), getMaxValue() + 1.f);
value = std::floor(value);
setImmediateValue(value);
}
else {
// Same as Quantity::randomize() but with setImmediateValue()
setImmediateValue(fromScaled(random::uniform()));
}
}
std::string ParamQuantity::getDescription() {
return description;
}
json_t* ParamQuantity::toJson() {
json_t* rootJ = json_object();
json_object_set_new(rootJ, "value", json_real(getValue()));
return rootJ;
}
void ParamQuantity::fromJson(json_t* rootJ) {
json_t* valueJ = json_object_get(rootJ, "value");
if (valueJ)
setImmediateValue(json_number_value(valueJ));
}
void ParamQuantity::setSmoothValue(float value) {
setValue(value);
}
float ParamQuantity::getSmoothValue() {
return getValue();
}
// SwitchQuantity
std::string SwitchQuantity::getDisplayValueString() {
int index = (int) std::floor(getValue() - getMinValue());
if (!(0 <= index && index < (int) labels.size()))
return "";
return labels[index];
}
void SwitchQuantity::setDisplayValueString(std::string s) {
// Find label that matches string, case insensitive.
auto it = std::find_if(labels.begin(), labels.end(), [&](const std::string& a) {
return string::lowercase(a) == string::lowercase(s);
});
if (it == labels.end())
return;
int index = std::distance(labels.begin(), it);
setImmediateValue(getMinValue() + index);
}
} // namespace engine
} // namespace rack