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Audio: Change how volume works

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Across the entire audio system, audio now works in 0-1 terms instead of
0-100 as before. Therefore, volume is now a double instead of an int.
The master volume of the AudioServer changes smoothly through a
FadingProperty, preventing clicks. Finally, volume computations are done
with logarithmic scaling, which is more natural for the human ear.

Note that this could be 4-5 different commits, but as they change each
other's code all the time, it makes no sense to split them up.
This commit is contained in:
kleines Filmröllchen 2021-08-27 23:47:09 +02:00 • committed by Andreas Kling
parent 2909c3a931
commit 152ec28da0
14 changed files with 190 additions and 45 deletions
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19
Userland/Applets/Audio/main.cpp
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@ -38,8 +38,8 @@ public:
update();
};
m_audio_client->on_main_mix_volume_change = [this](int volume) {
m_audio_volume = volume;
m_audio_client->on_main_mix_volume_change = [this](double volume) {
m_audio_volume = static_cast<int>(volume * 100);
if (!m_audio_muted)
update();
};
@ -87,14 +87,14 @@ public:
};
m_slider = m_root_container->add<GUI::VerticalSlider>();
m_slider->set_max(20);
int non_log_volume = sqrt(100 * m_audio_volume);
m_slider->set_value(-(non_log_volume / 5.0f) + 20);
m_slider->set_max(100);
m_slider->set_page_step(5);
m_slider->set_step(5);
m_slider->set_value(m_slider->max() - m_audio_volume);
m_slider->set_knob_size_mode(GUI::Slider::KnobSizeMode::Proportional);
m_slider->on_change = [&](int value) {
int volume = clamp((20 - value) * 5, 0, 100);
double volume_log = ((volume / 100.0) * (volume / 100.0)) * 100.0;
m_audio_client->set_main_mix_volume(static_cast<i32>(volume_log));
double volume = clamp(static_cast<double>(m_slider->max() - value) / m_slider->max(), 0.0, 1.0);
m_audio_client->set_main_mix_volume(volume);
update();
};
@ -131,8 +131,7 @@ private:
{
if (m_audio_muted)
return;
int new_slider_value = m_slider->value() + event.wheel_delta() / 4;
m_slider->set_value(new_slider_value);
m_slider->dispatch_event(event);
update();
}