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Extensive changes to improve NoteTrack display and (some) editing, NoteTrack playback via MIDI, and Midi-to-Audio alignment.

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rbdannenberg
2010-09-18 21:02:36 +00:00
parent f6327602e8
commit a1f0e5ed5b
96 changed files with 5679 additions and 3566 deletions
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34
lib-src/libscorealign/hillclimb.cpp
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@@ -26,12 +26,33 @@
* maximum.
*/
#include "hillclimb.h"
#include "stdio.h"
#include "malloc.h"
#include "sautils.h"
#include "hillclimb.h"
#define HC_VERBOSE 0
#define V if (HC_VERBOSE)
Hillclimb::~Hillclimb()
{
if (parameters) FREE(parameters);
if (step_size) FREE(step_size);
if (min_param) FREE(min_param);
if (max_param) FREE(max_param);
}
void Hillclimb::setup(int n_) {
n = n_;
parameters = ALLOC(double, n);
step_size = ALLOC(double, n);
min_param = ALLOC(double, n);
max_param = ALLOC(double, n);
}
void Hillclimb::set_parameters(double *p, double *ss,
double *min_, double *max_, int plen)
{
@@ -108,17 +129,20 @@ double Hillclimb::optimize()
}
*/
double Hillclimb::optimize()
double Hillclimb::optimize(Report_fn_ptr report, void *cookie)
{
double best = evaluate();
int iterations = 0;
while (true) {
(*report)(cookie, iterations, best);
V printf("best %g ", best);
// eval partial derivatives
int i;
// variables to search for max partial derivative
double max_y = best; // max of evaluate() so far
int max_i; // index where best max was found
double max_parameter; // the good parameter value for max_i
int max_i = 0; // index where best max was found
// the good parameter value for max_i:
double max_parameter = parameters[0];
// now search over all parameters for best improvement
for (i = 0; i < n; i++) {
V printf("optimize at %d param %g ", i, parameters[i]);
@@ -148,8 +172,10 @@ double Hillclimb::optimize()
parameters[i] = save_param;
V printf("\n");
}
iterations++; // for debugging, reporting
if (max_y <= best) { // no improvement, we're done
V printf("\nCompleted hillclimbing, best %g\n", best);
(*report)(cookie, iterations, best);
return best;
}
// improvement because max_y higher than best: