a749b16674
LibDSP is a library for digital signal processing, and is primarily intended to support the future DAW version of Piano.
44 lines
1.2 KiB
C++
44 lines
1.2 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 "Music.h"
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#include <AK/Types.h>
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#include <LibCore/Object.h>
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namespace LibDSP {
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// The DAW-wide timekeeper and synchronizer
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class Transport final : public Core::Object {
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C_OBJECT(Transport)
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public:
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Transport(u16 beats_per_minute, u8 beats_per_measure, u32 sample_rate)
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: m_beats_per_minute(beats_per_minute)
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, m_beats_per_measure(beats_per_measure)
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, m_sample_rate(sample_rate)
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{
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}
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Transport(u16 beats_per_minute, u8 beats_per_measure)
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: Transport(beats_per_minute, beats_per_measure, 44100)
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{
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}
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u32 const& time() const { return m_time; }
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u16 beats_per_minute() const { return m_beats_per_minute; }
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double current_second() const { return m_time / m_sample_rate; }
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double samples_per_measure() const { return (1.0 / m_beats_per_minute) * 60.0 * m_sample_rate; }
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double sample_rate() const { return m_sample_rate; }
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double current_measure() const { return m_time / samples_per_measure(); }
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private:
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u32 m_time { 0 };
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u16 const m_beats_per_minute { 0 };
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u8 const m_beats_per_measure { 0 };
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u32 const m_sample_rate;
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};
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}
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