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Use relative notes to make it sound almost correct

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This commit is contained in:
Gwilym Inzani 2023-07-17 01:19:02 +01:00
parent 4d699e9000
commit 07b00f11e1
2 changed files with 29 additions and 23 deletions
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7
tracker/agb-tracker/src/lib.rs
View file

@ -170,13 +170,10 @@ impl TrackerChannel {
channel.stop();
}
PatternEffect::Arpeggio(first, second) => {
let first: Num<u32, 8> = first.change_base();
let second: Num<u32, 8> = second.change_base();
match tick % 3 {
0 => channel.playback(self.base_speed),
1 => channel.playback(self.base_speed + first),
2 => channel.playback(self.base_speed + second),
1 => channel.playback(self.base_speed + first.change_base()),
2 => channel.playback(self.base_speed + second.change_base()),
_ => unreachable!(),
};
}

45
tracker/agb-xm-core/src/lib.rs
View file

@ -104,7 +104,7 @@ pub fn parse_module(module: &Module) -> TokenStream {
let start_pos = pattern_data.len();
for row in pattern.iter() {
let mut notes = vec![None; module.get_num_channels()];
let mut note_and_sample = vec![None; module.get_num_channels()];
for (i, slot) in row.iter().enumerate() {
let channel_number = i % module.get_num_channels();
@ -139,33 +139,42 @@ pub fn parse_module(module: &Module) -> TokenStream {
if matches!(slot.note, Note::KeyOff) {
effect1 = PatternEffect::Stop;
notes[channel_number] = None;
} else {
notes[channel_number] = Some(slot.note);
note_and_sample[channel_number] = None;
} else if !matches!(slot.note, Note::None) {
if sample != 0 {
note_and_sample[channel_number] = Some((slot.note, &samples[sample - 1]));
} else if let Some((note, _)) = &mut note_and_sample[channel_number] {
*note = slot.note;
}
}
let effect2 = match slot.effect_type {
0x0 => {
if slot.effect_parameter == 0 {
PatternEffect::None
} else if let Some(note) = notes[channel_number] {
} else if let Some((note, sample)) = note_and_sample[channel_number] {
let first_arpeggio = slot.effect_parameter >> 4;
let second_arpeggio = slot.effect_parameter & 0xF;
let note_speed = note_to_speed(note, 0.0, 0, module.frequency_type);
let note_speed = note_to_speed(
note,
sample.fine_tune,
sample.relative_note,
module.frequency_type,
);
let note = note as u8;
let first_arpeggio: Note = (note + first_arpeggio)
.try_into()
.expect("Note out of bounds");
let second_arpeggio: Note = (note + second_arpeggio)
.try_into()
.expect("Note out of bounds");
let first_arpeggio_speed =
note_to_speed(first_arpeggio, 0.0, 0, module.frequency_type);
let second_arpeggio_speed =
note_to_speed(second_arpeggio, 0.0, 0, module.frequency_type);
let first_arpeggio_speed = note_to_speed(
note,
sample.fine_tune,
sample.relative_note + first_arpeggio as i8,
module.frequency_type,
);
let second_arpeggio_speed = note_to_speed(
note,
sample.fine_tune,
sample.relative_note + second_arpeggio as i8,
module.frequency_type,
);
let first_arpeggio_difference = first_arpeggio_speed - note_speed;
let second_arpeggio_difference = second_arpeggio_speed - note_speed;