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Fix EventGrid concatenation

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This commit is contained in:
Denis Redozubov 2023-06-27 14:23:51 +04:00
parent 94a8340659
commit cc213b7b8e
1 changed files with 21 additions and 289 deletions
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310
src/midi/core.rs
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@ -230,21 +230,6 @@ impl<T> EventGrid<T> {
/// Adds two EventGrids together, manipulates the time of the right `EventGrid` by
/// adding the length of the left one to timings.
impl EventGrid<Tick> {
fn extend(&self, other: EventGrid<Tick>) -> EventGrid<Tick> {
// FIXME: get rid of unnecessary cloning
let other_events = other.clone().events.into_iter().map(|mut e| {
e.tick = e.tick + self.end;
e
});
let mut self_event_copy = self.events.clone();
self_event_copy.extend(other_events);
EventGrid {
events: self_event_copy,
start: self.start,
end: self.start + self.length() + other.length(),
}
}
pub fn concat(&self, other: EventGrid<Tick>) -> EventGrid<Tick> {
// FIXME: get rid of unnecessary cloning
let other_events = other.clone().events.into_iter().map(|mut e| {
@ -263,6 +248,24 @@ impl EventGrid<Tick> {
#[test]
fn test_concat_event_grid() {
let empty: EventGrid<Tick> = EventGrid::empty();
let kick_on = Event {
tick: Tick(0),
event_type: NoteOn(KickDrum),
};
let kick_off = Event {
tick: Tick(24),
event_type: NoteOff(KickDrum),
};
let simple_grid = EventGrid {
events: vec![kick_on, kick_off],
start: Tick(0),
end: Tick(48),
};
assert_eq!(empty.clone().concat(empty.clone()), empty);
assert_eq!(simple_grid.clone().concat(empty.clone()), simple_grid);
assert_eq!(empty.clone().concat(simple_grid.clone()), simple_grid);
let input = EventGrid {
events: vec![
Event {
@ -287,143 +290,6 @@ fn test_concat_event_grid() {
);
}
#[test]
fn test_extend_event_grid() {
let empty: EventGrid<Tick> = EventGrid::empty();
let kick_on = Event {
tick: Tick(0),
event_type: NoteOn(KickDrum),
};
let kick_off = Event {
tick: Tick(24),
event_type: NoteOff(KickDrum),
};
let simple_grid = EventGrid {
events: vec![kick_on, kick_off],
start: Tick(0),
end: Tick(48),
};
assert_eq!(empty.clone().extend(empty.clone()), empty);
assert_eq!(simple_grid.clone().extend(empty.clone()), simple_grid);
assert_eq!(empty.clone().extend(simple_grid.clone()), simple_grid);
assert_eq!(
simple_grid.clone().extend(simple_grid.clone()),
EventGrid {
events: vec![
Event {
tick: Tick(0),
event_type: NoteOn(KickDrum)
},
Event {
tick: Tick(24),
event_type: NoteOff(KickDrum)
},
Event {
tick: Tick(48),
event_type: NoteOn(KickDrum)
},
Event {
tick: Tick(72),
event_type: NoteOff(KickDrum)
}
],
start: Tick(0),
end: Tick(96)
}
);
let events = EventGrid {
events: vec![
Event {
tick: Tick(24),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(48),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(96),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(120),
event_type: NoteOff(SnareDrum),
},
],
start: Tick(24),
end: Tick(144),
};
let expected = EventGrid {
events: vec![
Event {
tick: Tick(24),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(48),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(96),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(120),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(144 + 24),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(144 + 48),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(144 + 96),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(144 + 120),
event_type: NoteOff(SnareDrum),
},
],
start: Tick(24),
end: Tick(264),
};
assert_eq!(events.extend(events.clone()), expected);
let events2_1 = EventGrid::new(
vec![
Event::new(Tick(0), NoteOn(CrashCymbal)),
Event::new(Tick(96), NoteOff(CrashCymbal)),
],
Tick(96),
);
let events2_2: EventGrid<Tick> = EventGrid {
events: vec![],
start: Tick(96),
end: Tick(192),
};
let result2 = EventGrid::new(events2_1.events.clone(), Tick(192));
assert_eq!(events2_1.extend(events2_2), result2);
let events3 = EventGrid {
events: Vec::new(),
start: Tick(96),
end: Tick(144),
};
assert_eq!(
events3.extend(events3.clone()),
EventGrid {
events: Vec::new(),
start: Tick(96),
end: Tick(192)
}
);
}
impl<T> EventGrid<T> {
fn empty() -> Self {
EventGrid {
@ -619,17 +485,6 @@ fn test_group_to_event_grid() {
// );
}
fn cycle_grid(event_grid: EventGrid<Tick>, times: Times) -> EventGrid<Tick> {
if times.0 <= 0 {
EventGrid::empty()
} else {
// FIXME: think about unnecessary cloning
(0..)
.take((times.0 - 1) as usize)
.fold(event_grid.clone(), |acc, _| acc.extend(event_grid.clone()))
}
}
fn concat_grid(event_grid: EventGrid<Tick>, times: Times) -> EventGrid<Tick> {
if times.0 <= 0 {
EventGrid::empty()
@ -665,131 +520,6 @@ fn test_concat_grid() {
);
}
#[test]
fn test_cycle_grid() {
assert_eq!(
cycle_grid(
EventGrid {
events: Vec::new(),
start: Tick(96),
end: Tick(144)
},
Times(2)
),
EventGrid {
events: Vec::new(),
start: Tick(96),
end: Tick(192)
}
);
let empty: EventGrid<Tick> = EventGrid::empty();
assert_eq!(cycle_grid(EventGrid::empty(), Times(2)), empty);
let simple_grid = EventGrid {
events: vec![
Event {
tick: Tick(0),
event_type: NoteOn(KickDrum),
},
Event {
tick: Tick(24),
event_type: NoteOff(KickDrum),
},
],
start: Tick(0),
end: Tick(48),
};
assert_eq!(cycle_grid(simple_grid.clone(), Times(0)), empty);
assert_eq!(cycle_grid(simple_grid.clone(), Times(1)), simple_grid);
assert_eq!(
cycle_grid(simple_grid.clone(), Times(2)),
EventGrid::new(
vec![
Event {
tick: Tick(0),
event_type: NoteOn(KickDrum)
},
Event {
tick: Tick(24),
event_type: NoteOff(KickDrum)
},
Event {
tick: Tick(48),
event_type: NoteOn(KickDrum)
},
Event {
tick: Tick(72),
event_type: NoteOff(KickDrum)
}
],
Tick(96)
)
);
let events = EventGrid::new(
vec![
Event {
tick: Tick(24),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(48),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(96),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(120),
event_type: NoteOff(SnareDrum),
},
],
Tick(144),
);
let expected = EventGrid::new(
vec![
Event {
tick: Tick(24),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(48),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(96),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(120),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(144 + 24),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(144 + 48),
event_type: NoteOff(SnareDrum),
},
Event {
tick: Tick(144 + 96),
event_type: NoteOn(SnareDrum),
},
Event {
tick: Tick(144 + 120),
event_type: NoteOff(SnareDrum),
},
],
Tick(264),
);
assert_eq!(cycle_grid(events.clone(), Times(2)), expected);
}
/// Takes multiple `Group`s and turn them into a single `EventGrid`.
/// The point of it is to combine timings into a single MIDI track.
fn groups_to_event_grid(part: Part, groups: &Groups) -> EventGrid<Tick> {
@ -802,7 +532,9 @@ fn groups_to_event_grid(part: Part, groups: &Groups) -> EventGrid<Tick> {
println!("(groups_to_event_grid) GRID: {:?}", grid);
println!("(groups_to_event_grid) NEW GRID: {:?}", grid);
// Note that using `+` is wrong here as it's messing with timings and it really shouldn't
grid = grid.extend(new_grid);
grid.events.extend(new_grid.events);
grid.end = new_grid.end;
time = grid.end;
});
grid