a749b16674
LibDSP is a library for digital signal processing, and is primarily intended to support the future DAW version of Piano.
73 lines
2 KiB
C++
73 lines
2 KiB
C++
/*
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* Copyright (c) 2021, kleines Filmröllchen <malu.bertsch@gmail.com>
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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/Noncopyable.h>
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#include <AK/StdLibExtras.h>
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#include <AK/Types.h>
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#include <LibCore/Object.h>
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#include <LibDSP/Music.h>
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#include <LibDSP/ProcessorParameter.h>
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#include <LibDSP/Transport.h>
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namespace LibDSP {
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// A processor processes notes or audio into notes or audio. Processors are e.g. samplers, synthesizers, effects, arpeggiators etc.
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class Processor : public Core::Object {
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C_OBJECT_ABSTRACT(Processor);
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public:
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virtual ~Processor()
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{
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}
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Signal process(Signal const& input_signal)
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{
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VERIFY(input_signal.type() == m_input_type);
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auto processed = process_impl(input_signal);
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VERIFY(processed.type() == m_output_type);
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return processed;
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}
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SignalType input_type() const { return m_input_type; }
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SignalType output_type() const { return m_output_type; }
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Vector<ProcessorParameter&>& parameters() { return m_parameters; }
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private:
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SignalType const m_input_type;
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SignalType const m_output_type;
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protected:
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Processor(NonnullRefPtr<Transport> transport, SignalType input_type, SignalType output_type)
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: m_input_type(input_type)
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, m_output_type(output_type)
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, m_transport(move(transport))
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{
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}
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virtual Signal process_impl(Signal const& input_signal) = 0;
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NonnullRefPtr<Transport> m_transport;
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Vector<ProcessorParameter&> m_parameters;
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};
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// A common type of processor that changes audio data, i.e. applies an effect to it.
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class EffectProcessor : public Processor {
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protected:
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EffectProcessor(NonnullRefPtr<Transport> transport)
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: Processor(transport, SignalType::Sample, SignalType::Sample)
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{
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}
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};
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// A common type of processor that synthesizes audio from note data.
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class SynthesizerProcessor : public Processor {
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protected:
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SynthesizerProcessor(NonnullRefPtr<Transport> transport)
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: Processor(transport, SignalType::Note, SignalType::Sample)
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{
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}
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};
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}
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