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/*
* Copyright (c) 2021-2022, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/SinglyLinkedList.h>
#include <LibDSP/Music.h>
#include <LibDSP/Processor.h>
#include <LibDSP/ProcessorParameter.h>
#include <LibDSP/Transport.h>
namespace DSP::Synthesizers {
enum Waveform : u8 {
Sine,
Triangle,
Square,
Saw,
Noise,
};
struct PitchedEnvelope : Envelope {
constexpr PitchedEnvelope() = default;
constexpr PitchedEnvelope(double envelope, u8 note)
: Envelope(envelope)
, note(note)
{
}
constexpr PitchedEnvelope(Envelope envelope, u8 note)
: Envelope(envelope)
, note(note)
{
}
u8 note;
};
class Classic : public SynthesizerProcessor {
public:
Classic(NonnullRefPtr<Transport>);
static Envelope compute_envelope(RollNote&);
Waveform wave() const { return m_waveform.value(); }
private:
virtual void process_impl(Signal const&, Signal&) override;
double volume_from_envelope(Envelope const&) const;
double wave_position(u32 sample_time, u8 note);
double samples_per_cycle(u8 note) const;
double sin_position(u32 sample_time, u8 note) const;
double triangle_position(u32 sample_time, u8 note) const;
double square_position(u32 sample_time, u8 note) const;
double saw_position(u32 sample_time, u8 note) const;
double noise_position(u32 sample_time, u8 note);
double get_random_from_seed(u64 note);
ProcessorEnumParameter<Waveform> m_waveform;
ProcessorRangeParameter m_attack;
ProcessorRangeParameter m_decay;
ProcessorRangeParameter m_sustain;
ProcessorRangeParameter m_release;
RollNotes m_playing_notes;
Array<double, note_frequencies.size()> last_random;
};
}
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