2017-12-13 23:28:35 +00:00
|
|
|
/*
|
|
|
|
|
* Modern effects for a modern Streamer
|
|
|
|
|
* Copyright (C) 2017 Michael Fabian Dirks
|
|
|
|
|
*
|
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
|
* it under the terms of the GNU General Public License as published by
|
|
|
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
|
|
|
* (at your option) any later version.
|
|
|
|
|
*
|
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
|
*
|
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#pragma once
|
|
|
|
|
#include <math.h>
|
|
|
|
|
#include <inttypes.h>
|
|
|
|
|
|
|
|
|
|
#define PI 3.1415926535897932384626433832795
|
|
|
|
|
#define PI2 6.283185307179586476925286766559
|
|
|
|
|
#define PI2_SQROOT 2.506628274631000502415765284811
|
|
|
|
|
|
|
|
|
|
inline double_t Gaussian1D(double_t x, double_t o) {
|
|
|
|
|
double_t c = (x / o);
|
|
|
|
|
double_t b = exp(-0.5 * c * c);
|
|
|
|
|
double_t a = (1.0 / (o * PI2_SQROOT));
|
|
|
|
|
return a * b;
|
|
|
|
|
}
|
2017-12-14 00:36:07 +00:00
|
|
|
|
|
|
|
|
inline size_t GetNearestPowerOfTwoAbove(size_t v) {
|
|
|
|
|
return 1 << size_t(ceil(log10(v) / log10(2)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
inline size_t GetNearestPowerOfTwoBelow(size_t v) {
|
|
|
|
|
return 1 << size_t(floor(log10(v) / log10(2)));
|
|
|
|
|
}
|
