mirror of
https://github.com/Xaymar/obs-StreamFX
synced 2024-11-11 06:15:05 +00:00
134 lines
3.9 KiB
C++
134 lines
3.9 KiB
C++
/*
|
|
* 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 <inttypes.h>
|
|
#include <math.h>
|
|
#include <string>
|
|
#include <utility>
|
|
|
|
// OBS
|
|
#include <graphics/vec2.h>
|
|
#include <graphics/vec3.h>
|
|
#include <graphics/vec4.h>
|
|
|
|
// Constants
|
|
#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;
|
|
}
|
|
|
|
inline double_t Bilateral1D(double_t x, double_t o)
|
|
{
|
|
double_t c = (x / 0);
|
|
double_t d = c * c;
|
|
double_t b = exp(-0.5 * d) / o;
|
|
return 0.39894 * b; // Seems to be (1.0 / (1 * PI2_SQROOT)) * b, otherwise no difference from Gaussian Blur
|
|
}
|
|
|
|
inline size_t GetNearestPowerOfTwoAbove(size_t v)
|
|
{
|
|
return 1ull << size_t(ceil(log10(double(v)) / log10(2.0)));
|
|
}
|
|
|
|
inline size_t GetNearestPowerOfTwoBelow(size_t v)
|
|
{
|
|
return 1ull << size_t(floor(log10(double(v)) / log10(2.0)));
|
|
}
|
|
|
|
namespace util {
|
|
__declspec(align(16)) struct vec3a : public vec3 {
|
|
static void* vec3a::operator new(size_t count);
|
|
static void* vec3a::operator new[](size_t count);
|
|
static void vec3a::operator delete(void* p);
|
|
static void vec3a::operator delete[](void* p);
|
|
};
|
|
|
|
__declspec(align(16)) struct vec4a : public vec4 {
|
|
static void* vec4a::operator new(size_t count);
|
|
static void* vec4a::operator new[](size_t count);
|
|
static void vec4a::operator delete(void* p);
|
|
static void vec4a::operator delete[](void* p);
|
|
};
|
|
|
|
std::pair<int64_t, int64_t> SizeFromString(std::string text, bool allowSquare = true);
|
|
|
|
namespace math {
|
|
// Proven by tests to be the fastest implementation on Intel and AMD CPUs.
|
|
// Ranking: log10, loop < bitscan < pow
|
|
// loop and log10 trade blows, usually almost identical.
|
|
// loop is used for integers, log10 for anything else.
|
|
template<typename T>
|
|
inline bool is_power_of_two(T v)
|
|
{
|
|
return T(1ull << uint64_t(floor(log10(T(v)) / log10(2.0)))) == v;
|
|
};
|
|
|
|
template<typename T>
|
|
inline bool is_power_of_two_loop(T v)
|
|
{
|
|
bool have_bit = false;
|
|
for (size_t index = 0; index < (sizeof(T) * 8); index++) {
|
|
bool cur = (v & (1ull << index)) != 0;
|
|
if (cur) {
|
|
if (have_bit)
|
|
return false;
|
|
have_bit = true;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#pragma push_macro("is_power_of_two_as_loop")
|
|
#define is_power_of_two_as_loop(x) \
|
|
template<> \
|
|
inline bool is_power_of_two(x v) \
|
|
{ \
|
|
return is_power_of_two_loop(v); \
|
|
};
|
|
is_power_of_two_as_loop(int8_t);
|
|
is_power_of_two_as_loop(uint8_t);
|
|
is_power_of_two_as_loop(int16_t);
|
|
is_power_of_two_as_loop(uint16_t);
|
|
is_power_of_two_as_loop(int32_t);
|
|
is_power_of_two_as_loop(uint32_t);
|
|
is_power_of_two_as_loop(int64_t);
|
|
is_power_of_two_as_loop(uint64_t);
|
|
#pragma pop_macro("is_power_of_two_as_loop")
|
|
|
|
template<typename T>
|
|
inline uint64_t get_power_of_two_floor(T v)
|
|
{
|
|
return uint64_t(floor(log10(T(v)) / log10(2.0)));
|
|
}
|
|
|
|
template<typename T>
|
|
inline uint64_t get_power_of_two_ceil(T v)
|
|
{
|
|
return uint64_t(ceil(log10(T(v)) / log10(2.0)));
|
|
}
|
|
} // namespace math
|
|
} // namespace util
|