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nvidia/vfx/superresolution: Automatically select ideal scale factors

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Prevents some scale factors from simply not rendering anything at all, resulting in weird scene layouts. While this may incur a higher performance penalty, it does fix the issue with enough accuracy to be deployed into production.
This commit is contained in:
Michael Fabian 'Xaymar' Dirks 2021-10-06 04:02:53 +02:00
parent 5952dfe73f
commit d1c8cda0a3
1 changed files with 54 additions and 15 deletions
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69
source/nvidia/vfx/nvidia-vfx-superresolution.cpp
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@ -21,6 +21,7 @@
#include "nvidia-vfx-superresolution.hpp"
#include <cmath>
#include <utility>
#include <vector>
#include "obs/gs/gs-helper.hpp"
#include "util/util-logging.hpp"
#include "util/utility.hpp"
@ -39,6 +40,37 @@
#define D_LOG_DEBUG(...) P_LOG_DEBUG(ST_PREFIX __VA_ARGS__)
#endif
static std::vector<float> supported_scale_factors{4. / 3., 1.5, 2., 3., 4.};
static float find_closest_scale_factor(float factor)
{
std::pair<float, float> minimal = {0.f, std::numeric_limits<float>::max()};
for (float delta : supported_scale_factors) {
float value = abs(delta - factor);
if (minimal.second > value) {
minimal.first = delta;
minimal.second = value;
}
}
return minimal.first;
}
static size_t find_closest_scale_factor_index(float factor)
{
std::pair<size_t, float> minimal = {0.f, std::numeric_limits<float>::max()};
for (size_t idx = 0; idx < supported_scale_factors.size(); idx++) {
float delta = supported_scale_factors[idx];
float value = abs(delta - factor);
if (minimal.second > value) {
minimal.first = idx;
minimal.second = value;
}
}
return minimal.first;
}
streamfx::nvidia::vfx::superresolution::~superresolution()
{
auto gctx = ::streamfx::obs::gs::context();
@ -138,23 +170,14 @@ void streamfx::nvidia::vfx::superresolution::set_scale(float scale)
scale = std::clamp<float>(scale, 1., 4.);
// Match to nearest scale.
std::pair<float, float> minimal = {0.f, std::numeric_limits<float>::max()};
std::vector<float> deltas{
1.f + (1.f / 3.f), 1.5f, 2.0f, 3.0f, 4.0f,
};
for (float delta : deltas) {
float value = abs(delta - scale);
if (minimal.second > value) {
minimal.first = delta;
minimal.second = value;
}
}
double factor = find_closest_scale_factor(scale);
// If anything was changed, flag the effect as dirty.
if (!::streamfx::util::math::is_close<float>(_scale, minimal.first, 0.01f))
if (!::streamfx::util::math::is_close<float>(_scale, factor, 0.01f))
_dirty = true;
_scale = minimal.first;
// Save new scale factor.
_scale = factor;
}
float streamfx::nvidia::vfx::superresolution::scale()
@ -182,6 +205,10 @@ void streamfx::nvidia::vfx::superresolution::size(std::pair<uint32_t, uint32_t>
max_height = 1080;
}
// Restore Input Size
input_size.first = size.first;
input_size.second = size.second;
// Calculate Input Size
if (input_size.first > input_size.second) {
// Dominant Width
@ -198,8 +225,20 @@ void streamfx::nvidia::vfx::superresolution::size(std::pair<uint32_t, uint32_t>
}
// Calculate Output Size.
output_size.first = static_cast<uint32_t>(input_size.first * _scale);
output_size.second = static_cast<uint32_t>(input_size.second * _scale);
output_size.first = static_cast<uint32_t>(std::lround(input_size.first * _scale));
output_size.second = static_cast<uint32_t>(std::lround(input_size.second * _scale));
// Verify that this is a valid scale factor.
float width_mul = (static_cast<float>(output_size.first) / static_cast<float>(input_size.first));
float height_mul = (static_cast<float>(output_size.second) / static_cast<float>(input_size.second));
if (!::streamfx::util::math::is_close<float>(width_mul, _scale, 0.00001)
|| !::streamfx::util::math::is_close<float>(height_mul, _scale, 0.00001)) {
size_t scale_idx = find_closest_scale_factor_index(_scale);
if (scale_idx < supported_scale_factors.size()) {
_scale = supported_scale_factors[scale_idx + 1];
this->size(size, input_size, output_size);
}
}
}
std::shared_ptr<::streamfx::obs::gs::texture>