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-rw-r--r--Applications/Piano/AudioEngine.cpp38
-rw-r--r--Applications/Piano/AudioEngine.h9
-rw-r--r--Applications/Piano/KnobsWidget.cpp13
-rw-r--r--Applications/Piano/KnobsWidget.h3
-rw-r--r--Applications/Piano/MainWidget.cpp2
-rw-r--r--Applications/Piano/Music.h7
6 files changed, 62 insertions, 10 deletions
diff --git a/Applications/Piano/AudioEngine.cpp b/Applications/Piano/AudioEngine.cpp
index e853bdf05a..2af2fb30bd 100644
--- a/Applications/Piano/AudioEngine.cpp
+++ b/Applications/Piano/AudioEngine.cpp
@@ -32,6 +32,7 @@
AudioEngine::AudioEngine()
{
set_sustain_impl(0);
+ set_attack(0);
set_decay(0);
}
@@ -45,12 +46,26 @@ void AudioEngine::fill_buffer(FixedArray<Sample>& buffer)
for (size_t i = 0; i < buffer.size(); ++i) {
for (size_t note = 0; note < note_count; ++note) {
- if (!m_note_on[note])
+ switch (m_envelope[note]) {
+ case Done:
continue;
-
- m_power[note] -= m_decay_step;
- if (m_power[note] < m_sustain_level)
- m_power[note] = m_sustain_level;
+ case Attack:
+ m_power[note] += m_attack_step;
+ if (m_power[note] >= 1) {
+ m_power[note] = 1;
+ m_envelope[note] = Decay;
+ }
+ break;
+ case Decay:
+ m_power[note] -= m_decay_step;
+ if (m_power[note] < m_sustain_level)
+ m_power[note] = m_sustain_level;
+ break;
+ case Release:
+ break;
+ default:
+ ASSERT_NOT_REACHED();
+ }
double val = 0;
switch (m_wave) {
@@ -150,13 +165,15 @@ void AudioEngine::set_note(int note, Switch switch_note)
if (switch_note == On) {
if (m_note_on[note] == 0) {
m_pos[note] = 0;
- m_power[note] = 1;
+ m_envelope[note] = Attack;
}
++m_note_on[note];
} else {
if (m_note_on[note] >= 1) {
- if (m_note_on[note] == 1)
+ if (m_note_on[note] == 1) {
m_power[note] = 0;
+ m_envelope[note] = Done;
+ }
--m_note_on[note];
}
}
@@ -209,6 +226,13 @@ static inline double calculate_step(double distance, int milliseconds)
return step;
}
+void AudioEngine::set_attack(int attack)
+{
+ ASSERT(attack >= 0);
+ m_attack = attack;
+ m_attack_step = calculate_step(1, m_attack);
+}
+
void AudioEngine::set_decay(int decay)
{
ASSERT(decay >= 0);
diff --git a/Applications/Piano/AudioEngine.h b/Applications/Piano/AudioEngine.h
index 33ef6af27a..430745f007 100644
--- a/Applications/Piano/AudioEngine.h
+++ b/Applications/Piano/AudioEngine.h
@@ -43,6 +43,7 @@ public:
int octave() const { return m_octave; }
int octave_base() const { return (m_octave - octave_min) * 12; }
int wave() const { return m_wave; }
+ int attack() const { return m_attack; }
int decay() const { return m_decay; }
int sustain() const { return m_sustain; }
int delay() const { return m_delay; }
@@ -55,6 +56,7 @@ public:
void set_octave(Direction);
void set_wave(int wave);
void set_wave(Direction);
+ void set_attack(int attack);
void set_decay(int decay);
void set_sustain(int sustain);
void set_delay(int delay);
@@ -76,11 +78,14 @@ private:
Queue<NonnullOwnPtr<FixedArray<Sample>>> m_delay_buffers;
u8 m_note_on[note_count] { 0 };
- double m_power[note_count]; // Initialized lazily.
- double m_pos[note_count]; // Initialized lazily.
+ double m_power[note_count] { 0 };
+ double m_pos[note_count]; // Initialized lazily.
+ Envelope m_envelope[note_count] { Done };
int m_octave { 4 };
int m_wave { first_wave };
+ int m_attack;
+ double m_attack_step;
int m_decay;
double m_decay_step;
int m_sustain;
diff --git a/Applications/Piano/KnobsWidget.cpp b/Applications/Piano/KnobsWidget.cpp
index 0ea9432dee..d2d9324bfb 100644
--- a/Applications/Piano/KnobsWidget.cpp
+++ b/Applications/Piano/KnobsWidget.cpp
@@ -50,6 +50,7 @@ KnobsWidget::KnobsWidget(GUI::Widget* parent, AudioEngine& audio_engine, MainWid
m_octave_label = GUI::Label::construct("Octave", m_labels_container);
m_wave_label = GUI::Label::construct("Wave", m_labels_container);
+ m_attack_label = GUI::Label::construct("Attack", m_labels_container);
m_decay_label = GUI::Label::construct("Decay", m_labels_container);
m_sustain_label = GUI::Label::construct("Sustain", m_labels_container);
m_delay_label = GUI::Label::construct("Delay", m_labels_container);
@@ -61,6 +62,7 @@ KnobsWidget::KnobsWidget(GUI::Widget* parent, AudioEngine& audio_engine, MainWid
m_octave_value = GUI::Label::construct(String::number(m_audio_engine.octave()), m_values_container);
m_wave_value = GUI::Label::construct(wave_strings[m_audio_engine.wave()], m_values_container);
+ m_attack_value = GUI::Label::construct(String::number(m_audio_engine.attack()), m_values_container);
m_decay_value = GUI::Label::construct(String::number(m_audio_engine.decay()), m_values_container);
m_sustain_value = GUI::Label::construct(String::number(m_audio_engine.sustain()), m_values_container);
m_delay_value = GUI::Label::construct(String::number(m_audio_engine.delay() / m_audio_engine.tick()), m_values_container);
@@ -93,6 +95,17 @@ KnobsWidget::KnobsWidget(GUI::Widget* parent, AudioEngine& audio_engine, MainWid
m_wave_value->set_text(wave_strings[new_wave]);
};
+ constexpr int max_attack = 1000;
+ m_attack_knob = GUI::Slider::construct(Orientation::Vertical, m_knobs_container);
+ m_attack_knob->set_range(0, max_attack);
+ m_attack_knob->set_value(max_attack - m_audio_engine.attack());
+ m_attack_knob->on_value_changed = [this](int value) {
+ int new_attack = max_attack - value;
+ m_audio_engine.set_attack(new_attack);
+ ASSERT(new_attack == m_audio_engine.attack());
+ m_attack_value->set_text(String::number(new_attack));
+ };
+
constexpr int max_decay = 1000;
m_decay_knob = GUI::Slider::construct(Orientation::Vertical, m_knobs_container);
m_decay_knob->set_range(0, max_decay);
diff --git a/Applications/Piano/KnobsWidget.h b/Applications/Piano/KnobsWidget.h
index 3e39694b80..2eca83982f 100644
--- a/Applications/Piano/KnobsWidget.h
+++ b/Applications/Piano/KnobsWidget.h
@@ -53,6 +53,7 @@ private:
RefPtr<GUI::Widget> m_labels_container;
RefPtr<GUI::Label> m_octave_label;
RefPtr<GUI::Label> m_wave_label;
+ RefPtr<GUI::Label> m_attack_label;
RefPtr<GUI::Label> m_decay_label;
RefPtr<GUI::Label> m_sustain_label;
RefPtr<GUI::Label> m_delay_label;
@@ -60,6 +61,7 @@ private:
RefPtr<GUI::Widget> m_values_container;
RefPtr<GUI::Label> m_octave_value;
RefPtr<GUI::Label> m_wave_value;
+ RefPtr<GUI::Label> m_attack_value;
RefPtr<GUI::Label> m_decay_value;
RefPtr<GUI::Label> m_sustain_value;
RefPtr<GUI::Label> m_delay_value;
@@ -67,6 +69,7 @@ private:
RefPtr<GUI::Widget> m_knobs_container;
RefPtr<GUI::Slider> m_octave_knob;
RefPtr<GUI::Slider> m_wave_knob;
+ RefPtr<GUI::Slider> m_attack_knob;
RefPtr<GUI::Slider> m_decay_knob;
RefPtr<GUI::Slider> m_sustain_knob;
RefPtr<GUI::Slider> m_delay_knob;
diff --git a/Applications/Piano/MainWidget.cpp b/Applications/Piano/MainWidget.cpp
index 09d3881100..9d2003763d 100644
--- a/Applications/Piano/MainWidget.cpp
+++ b/Applications/Piano/MainWidget.cpp
@@ -60,7 +60,7 @@ MainWidget::MainWidget(AudioEngine& audio_engine)
m_knobs_widget = KnobsWidget::construct(m_keys_and_knobs_container, audio_engine, *this);
m_knobs_widget->set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fill);
- m_knobs_widget->set_preferred_size(250, 0);
+ m_knobs_widget->set_preferred_size(300, 0);
}
MainWidget::~MainWidget()
diff --git a/Applications/Piano/Music.h b/Applications/Piano/Music.h
index 716a17ddfc..858edd45d2 100644
--- a/Applications/Piano/Music.h
+++ b/Applications/Piano/Music.h
@@ -80,6 +80,13 @@ constexpr const char* wave_strings[] = {
constexpr int first_wave = Sine;
constexpr int last_wave = Noise;
+enum Envelope {
+ Done,
+ Attack,
+ Decay,
+ Release,
+};
+
enum KeyColor {
White,
Black,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 09:48:53 +0000