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