lisyarus/psemek
1
0
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Remove linear filter from volume control, use simple multiplication instead

Browse source
This commit is contained in:
Nikita Lisitsa 2022-10-06 23:30:23 +03:00
parent 8111af2c54
commit e7d3bc45d1
2 changed files with 4 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
libs/audio/include/psemek/audio/effect/volume_base.hpp
View file

@ -26,8 +26,6 @@ namespace psemek::audio
std::atomic<float> gain_[2];
std::atomic<float> smoothness_multiplier_;
float real_gain_[2];
float last_sample_src_[2];
float last_sample_tgt_[2];
};
}

16
libs/audio/source/effect/volume_base.cpp
View file

@ -2,6 +2,8 @@
#include <psemek/audio/constants.hpp>
#include <psemek/audio/smooth.hpp>
#include <psemek/log/log.hpp>
#include <cmath>
namespace psemek::audio
@ -11,8 +13,6 @@ namespace psemek::audio
: gain_{gain_left, gain_right}
, smoothness_multiplier_{smoothness_to_multiplier(smoothness)}
, real_gain_{gain_left, gain_right}
, last_sample_src_{0.f, 0.f}
, last_sample_tgt_{0.f, 0.f}
{}
float volume_base::smoothness() const
@ -31,19 +31,11 @@ namespace psemek::audio
float gain[2] = {gain_[0].load(), gain_[1].load()};
float smoothness_multiplier = smoothness_multiplier_.load();
auto apply_impl = [this](float & target, int i)
{
auto old = target;
target = last_sample_tgt_[i] + (old - last_sample_src_[i]) * real_gain_[i];
last_sample_src_[i] = old;
last_sample_tgt_[i] = target;
};
auto end = data + sample_count;
for (auto p = data; p < end;)
{
apply_impl(*p++, 0);
apply_impl(*p++, 1);
*p++ *= real_gain_[0];
*p++ *= real_gain_[1];
smooth_update(real_gain_[0], gain[0], smoothness_multiplier);
smooth_update(real_gain_[1], gain[1], smoothness_multiplier);