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29 lines
731 B
C++
29 lines
731 B
C++
4 years ago
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#include "stmdsp.hpp"
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#include "exprtk.hpp"
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#include <string>
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#include <vector>
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std::vector<stmdsp::dacsample_t> siggen_formula_parse(const std::string& formulaString)
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{
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double x = 0;
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exprtk::symbol_table<double> symbol_table;
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symbol_table.add_variable("x", x);
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symbol_table.add_constants();
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exprtk::expression<double> expression;
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expression.register_symbol_table(symbol_table);
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exprtk::parser<double> parser;
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parser.compile(formulaString, expression);
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std::vector<stmdsp::dacsample_t> samples;
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for (x = 0; samples.size() < stmdsp::SAMPLES_MAX; x += 1) {
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auto y = static_cast<stmdsp::dacsample_t>(expression.value());
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samples.push_back(y);
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}
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return samples;
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}
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