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/*
* Copyright (c) 2021-2022, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullRefPtr.h>
#include <AK/RefCounted.h>
#include <LibDSP/Music.h>
#include <LibDSP/Transport.h>
namespace DSP {
class Keyboard : public RefCounted<Keyboard> {
public:
enum class Direction : bool {
Down,
Up,
};
enum class Switch : bool {
Off,
On,
};
Keyboard(NonnullRefPtr<Transport> transport)
: m_transport(move(transport))
{
}
u8 virtual_keyboard_octave() const { return m_virtual_keyboard_octave; }
u8 virtual_keyboard_octave_base() const { return (m_virtual_keyboard_octave - octave_min) * 12; }
// Automatically clips the octave between the minimum and maximum.
void change_virtual_keyboard_octave(Direction);
// Errors out if the set octave is out of range.
ErrorOr<void> set_virtual_keyboard_octave(u8 octave);
void set_keyboard_note(u8 pitch, Switch note_switch);
void set_keyboard_note_in_active_octave(i8 octave_offset, Switch note_switch);
RollNotes const& notes() const { return m_pressed_notes; }
Optional<RollNote> note_at(u8 pitch) const { return m_pressed_notes[pitch]; }
bool is_pressed(u8 pitch) const;
bool is_pressed_in_active_octave(i8 octave_offset) const;
private:
u8 m_virtual_keyboard_octave { 4 };
RollNotes m_pressed_notes;
NonnullRefPtr<Transport> m_transport;
static constexpr int const octave_min = 1;
static constexpr int const octave_max = 7;
};
}
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