David Robillard
c1cfa12d6e
This lets us get a more explicit handle on time conversions, and is the main step towards using actual beat:tick time and getting away from floating point precision problems.
129 lines
3.8 KiB
C++
129 lines
3.8 KiB
C++
/* This file is part of Evoral.
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* Copyright (C) 2008 David Robillard <http://drobilla.net>
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* Copyright (C) 2000-2008 Paul Davis
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*
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* Evoral is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef EVORAL_NOTE_HPP
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#define EVORAL_NOTE_HPP
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#include <algorithm>
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#include <glib.h>
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#include <stdint.h>
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#include "evoral/visibility.h"
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#include "evoral/MIDIEvent.hpp"
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namespace Evoral {
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/** An abstract (protocol agnostic) note.
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*
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* Currently a note is defined as (on event, length, off event).
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*/
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template<typename Time>
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#ifdef COMPILER_MSVC
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class LIBEVORAL_LOCAL Note {
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#else
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class LIBEVORAL_TEMPLATE_API Note {
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#endif
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public:
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Note(uint8_t chan=0, Time time=Time(), Time len=Time(), uint8_t note=0, uint8_t vel=0x40);
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Note(const Note<Time>& copy);
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~Note();
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const Note<Time>& operator=(const Note<Time>& copy);
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inline bool operator==(const Note<Time>& other) {
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return time() == other.time() &&
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note() == other.note() &&
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length() == other.length() &&
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velocity() == other.velocity() &&
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off_velocity() == other.off_velocity() &&
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channel() == other.channel();
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}
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inline event_id_t id() const { return _on_event.id(); }
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void set_id (event_id_t);
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inline Time time() const { return _on_event.time(); }
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inline Time end_time() const { return _off_event.time(); }
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inline uint8_t note() const { return _on_event.note(); }
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inline uint8_t velocity() const { return _on_event.velocity(); }
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inline uint8_t off_velocity() const { return _off_event.velocity(); }
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inline Time length() const { return _off_event.time() - _on_event.time(); }
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inline uint8_t channel() const {
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assert(_on_event.channel() == _off_event.channel());
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return _on_event.channel();
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}
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private:
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inline int clamp(int val, int low, int high) {
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return std::min (std::max (val, low), high);
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}
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public:
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inline void set_time(Time t) {
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_off_event.set_time(t + length());
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_on_event.set_time(t);
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}
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inline void set_note(uint8_t n) {
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const uint8_t nn = clamp(n, 0, 127);
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_on_event.buffer()[1] = nn;
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_off_event.buffer()[1] = nn;
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}
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inline void set_velocity(uint8_t n) {
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_on_event.buffer()[2] = clamp(n, 0, 127);
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}
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inline void set_off_velocity(uint8_t n) {
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_off_event.buffer()[2] = clamp(n, 0, 127);
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}
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inline void set_length(Time l) {
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_off_event.set_time(_on_event.time() + l);
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}
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inline void set_channel(uint8_t c) {
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const uint8_t cc = clamp(c, 0, 16);
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_on_event.set_channel(cc);
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_off_event.set_channel(cc);
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}
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inline Event<Time>& on_event() { return _on_event; }
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inline const Event<Time>& on_event() const { return _on_event; }
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inline Event<Time>& off_event() { return _off_event; }
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inline const Event<Time>& off_event() const { return _off_event; }
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private:
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// Event buffers are self-contained
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MIDIEvent<Time> _on_event;
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MIDIEvent<Time> _off_event;
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};
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template<typename Time>
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/*LIBEVORAL_API*/ std::ostream& operator<<(std::ostream& o, const Evoral::Note<Time>& n) {
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o << "Note #" << n.id() << ": pitch = " << (int) n.note()
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<< " @ " << n.time() << " .. " << n.end_time()
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<< " velocity " << (int) n.velocity()
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<< " chn " << (int) n.channel();
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return o;
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}
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} // namespace Evoral
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#ifdef COMPILER_MSVC
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#include "../src/Note.impl"
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#endif
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#endif // EVORAL_NOTE_HPP
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