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https://github.com/cookiengineer/audacity
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44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
/*
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* hillclimb.h
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* scorealign
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*
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* Created by Roger Dannenberg on 10/20/07.
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* Copyright 2007 by Roger B. Dannenberg. All rights reserved.
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*
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* USAGE:
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* Subclass and define evaluate, a function of n parameters.
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* Set parameters, step_size, min, max, and n. Parameters must
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* be near a local maximum and step_size defines the grid that
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* is searched. Search will not go outside of min and max.
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* Call optimize()
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* retrieve optimized parameter values with get_parameters.
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*
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*/
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// while optimizing, this function is called to report progress
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typedef void (*Report_fn_ptr)(void *cookie, int iteration, double best);
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class Hillclimb {
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protected:
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double *parameters; // parameters to optimize
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double *step_size; // step size for each parameter (these are
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// provided by the user and remain fixed)
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double *min_param; // minimum parameter values
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double *max_param; // maximum parameter values
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int n; // number of parameters
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public:
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Hillclimb() {
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parameters = step_size = min_param = max_param = NULL;
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}
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void setup(int n_);
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~Hillclimb();
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void set_parameters(double *parameters_, double *step_size_,
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double *min_, double *max_, int n_);
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// retrieve parameters after optimization:
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double *get_parameters() { return parameters; }
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virtual double evaluate() = 0;
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double optimize(Report_fn_ptr report, void *cookie);
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};
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