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properly handle interpolation when queried x is left of last data position

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This commit is contained in:
Lennart Poettering 2009-04-06 16:38:38 +02:00
parent daa945aa32
commit 7fc2382a0a
1 changed files with 17 additions and 1 deletions
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18
src/pulsecore/time-smoother.c
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@ -291,7 +291,8 @@ static void estimate(pa_smoother *s, pa_usec_t x, pa_usec_t *y, double *deriv) {
pa_assert(s); pa_assert(s);
pa_assert(y); pa_assert(y);
if (!s->smoothing || x >= s->px) { if (x >= s->px) {
/* Linear interpolation right from px */
int64_t t; int64_t t;
/* The requested point is right of the point where we wanted /* The requested point is right of the point where we wanted
@ -307,7 +308,22 @@ static void estimate(pa_smoother *s, pa_usec_t x, pa_usec_t *y, double *deriv) {
if (deriv) if (deriv)
*deriv = s->dp; *deriv = s->dp;
} else if (x <= s->ex) {
/* Linear interpolation left from ex */
int64_t t;
t = (int64_t) s->ey - (int64_t) llrint(s->de * (double) (s->ex - x));
if (t < 0)
t = 0;
*y = (pa_usec_t) t;
if (deriv)
*deriv = s->de;
} else { } else {
/* Spline interpolation between ex and px */
double tx, ty; double tx, ty;
/* Ok, we're not yet on track, thus let's interpolate, and /* Ok, we're not yet on track, thus let's interpolate, and