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factor out sqrt many million per sec

This commit is contained in:
Anthony Minessale 2017-02-27 11:01:56 -06:00
parent 91d62b7cc6
commit 16656b5b17
2 changed files with 6 additions and 6 deletions
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4
src/mod/applications/mod_video_filter/mod_video_filter.c
View File

@ -108,7 +108,7 @@ static void parse_params(chromakey_context_t *context, int start, int argc, char
switch_color_set_rgb(&context->mask[j], list[j]);
if (thresh) {
context->thresholds[j] = thresh;
context->thresholds[j] = thresh*thresh;
}
context->mask_len++;
}
@ -121,7 +121,7 @@ static void parse_params(chromakey_context_t *context, int start, int argc, char
int j;
if (thresh > 0) {
context->threshold = thresh;
context->threshold = thresh * thresh;
for (j = 0; j < context->mask_len; j++) {
if (!context->thresholds[j]) context->thresholds[j] = context->threshold;

8
src/switch_core_video.c
View File

@ -768,13 +768,13 @@ static inline int switch_color_distance(switch_rgb_color_t *c1, switch_rgb_color
cg2 = c1->g/2 - c2->g/2;
cb2 = c1->b/2 - c2->b/2;
a = sqrt((2*cr*cr) + (4*cg*cg) + (3*cb*cb));
b = sqrt((2*cr2*cr2) + (4*cg2*cg2) + (3*cb2*cb2));
a = ((2*cr*cr) + (4*cg*cg) + (3*cb*cb));
b = ((2*cr2*cr2) + (4*cg2*cg2) + (3*cb2*cb2));
aa = (int)a;
bb = (int)b*5;
bb = (int)b*25;
r = (((bb*2)+(aa))/3)/10;
r = (((bb*4)+(aa))/9)/100;
return r;