RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-25 13:55:07 +00:00
Code Issues Activity Actions

Piano: Add sustain

Browse source
This commit is contained in:
William McPherson 2020-02-05 02:39:51 +11:00 • committed by Andreas Kling
parent 421a340572
commit 5990b3b2e6
5 changed files with 40 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

20
Applications/Piano/AudioEngine.cpp
View file

@ -31,6 +31,7 @@
AudioEngine::AudioEngine()
{
set_sustain_impl(0);
set_decay(0);
}
@ -48,8 +49,8 @@ void AudioEngine::fill_buffer(FixedArray<Sample>& buffer)
continue;
m_power[note] -= m_decay_step;
if (m_power[note] < 0)
m_power[note] = 0;
if (m_power[note] < m_sustain_level)
m_power[note] = m_sustain_level;
double val = 0;
switch (m_wave) {
@ -212,7 +213,20 @@ void AudioEngine::set_decay(int decay)
{
ASSERT(decay >= 0);
m_decay = decay;
m_decay_step = calculate_step(1, m_decay);
m_decay_step = calculate_step(1 - m_sustain_level, m_decay);
}
void AudioEngine::set_sustain_impl(int sustain)
{
ASSERT(sustain >= 0);
m_sustain = sustain;
m_sustain_level = sustain / 1000.0;
}
void AudioEngine::set_sustain(int sustain)
{
set_sustain_impl(sustain);
set_decay(m_decay);
}
void AudioEngine::set_delay(int delay)