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/*
* Copyright (c) 2021, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "Music.h"
#include <AK/Types.h>
#include <LibCore/Object.h>
namespace LibDSP {
// The DAW-wide timekeeper and synchronizer
class Transport final : public Core::Object {
C_OBJECT(Transport)
public:
constexpr u32& time() { return m_time; }
constexpr u16 beats_per_minute() const { return m_beats_per_minute; }
constexpr double current_second() const { return static_cast<double>(m_time) / m_sample_rate; }
constexpr double samples_per_measure() const { return (1.0 / m_beats_per_minute) * 60.0 * m_sample_rate; }
constexpr double sample_rate() const { return m_sample_rate; }
constexpr double ms_sample_rate() const { return m_sample_rate / 1000.; }
constexpr double current_measure() const { return m_time / samples_per_measure(); }
private:
Transport(u16 beats_per_minute, u8 beats_per_measure, u32 sample_rate)
: m_beats_per_minute(beats_per_minute)
, m_beats_per_measure(beats_per_measure)
, m_sample_rate(sample_rate)
{
}
Transport(u16 beats_per_minute, u8 beats_per_measure)
: Transport(beats_per_minute, beats_per_measure, 44100)
{
}
// FIXME: You can't make more than 24h of (48kHz) music with this.
// But do you want to, really? :^)
u32 m_time { 0 };
u16 const m_beats_per_minute { 0 };
u8 const m_beats_per_measure { 0 };
u32 const m_sample_rate;
};
}
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