From 5990b3b2e64da36323ebaa79c4cbf110c48c7a7c Mon Sep 17 00:00:00 2001
From: William McPherson <willmcpherson2@gmail.com>
Date: Wed, 5 Feb 2020 02:39:51 +1100
Subject: Piano: Add sustain

---
 Applications/Piano/AudioEngine.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'Applications/Piano/AudioEngine.h')

diff --git a/Applications/Piano/AudioEngine.h b/Applications/Piano/AudioEngine.h
index 4f5bdc1585..33ef6af27a 100644
--- a/Applications/Piano/AudioEngine.h
+++ b/Applications/Piano/AudioEngine.h
@@ -44,6 +44,7 @@ public:
     int octave_base() const { return (m_octave - octave_min) * 12; }
     int wave() const { return m_wave; }
     int decay() const { return m_decay; }
+    int sustain() const { return m_sustain; }
     int delay() const { return m_delay; }
     int time() const { return m_time; }
     int tick() const { return m_tick; }
@@ -55,6 +56,7 @@ public:
     void set_wave(int wave);
     void set_wave(Direction);
     void set_decay(int decay);
+    void set_sustain(int sustain);
     void set_delay(int delay);
 
 private:
@@ -64,6 +66,8 @@ private:
     double triangle(size_t note);
     double noise() const;
 
+    void set_sustain_impl(int sustain);
+
     FixedArray<Sample> m_front_buffer { sample_count };
     FixedArray<Sample> m_back_buffer { sample_count };
     FixedArray<Sample>* m_front_buffer_ptr { &m_front_buffer };
@@ -79,6 +83,8 @@ private:
     int m_wave { first_wave };
     int m_decay;
     double m_decay_step;
+    int m_sustain;
+    double m_sustain_level;
     int m_delay { 0 };
 
     int m_time { 0 };
-- 
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