Handle vibrato in the instrument too

tracker/agb-midi-core/src/lib.rs

@@ -358,6 +358,10 @@ pub fn parse_midi(midi_info: &MidiInfo) -> Track {
             sustain: Some(envelope.amounts.len() - 1),
             loop_start: None,
             loop_end: None,
+
+            vib_waveform: Default::default(),
+            vib_amount: Default::default(),
+            vib_speed: Default::default(),
         })
         .collect();
 

tracker/agb-tracker-interop/src/lib.rs

@@ -49,6 +49,10 @@ pub struct Envelope {
     pub sustain: Option<usize>,
     pub loop_start: Option<usize>,
     pub loop_end: Option<usize>,
+
+    pub vib_waveform: Waveform,
+    pub vib_amount: Num<u16, 12>,
+    pub vib_speed: u8,
 }
 
 #[derive(Debug, Default, Clone, PartialEq, Eq)]
@@ -80,7 +84,7 @@ pub enum PatternEffect {
     PitchBend(Num<u32, 8>),
 }
 
-#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash)]
 pub enum Waveform {
     #[default]
     Sine,
@@ -146,6 +150,9 @@ impl quote::ToTokens for Envelope {
             sustain,
             loop_start,
             loop_end,
+            vib_amount,
+            vib_speed,
+            vib_waveform,
         } = self;
 
         let amount = amount.iter().map(|value| {
@@ -153,6 +160,11 @@ impl quote::ToTokens for Envelope {
             quote! { agb_tracker::__private::Num::from_raw(#value) }
         });
 
+        let vib_amount = {
+            let value = vib_amount.to_raw();
+            quote! { agb_tracker::__private::Num::from_raw(#value) }
+        };
+
         let sustain = match sustain {
             Some(value) => quote!(Some(#value)),
             None => quote!(None),
@@ -175,6 +187,10 @@ impl quote::ToTokens for Envelope {
                     sustain: #sustain,
                     loop_start: #loop_start,
                     loop_end: #loop_end,
+
+                    vib_waveform: #vib_waveform,
+                    vib_amount: #vib_amount,
+                    vib_speed: #vib_speed,
                 }
             }
         });

tracker/agb-tracker/src/lib.rs

@@ -141,23 +141,27 @@ impl Waves {
     fn value(&self) -> Num<u32, 8> {
         assert!(self.amount.abs() <= 1.into());
 
-        let lookup = match self.waveform {
-            Waveform::Sine => lookups::SINE_LOOKUP,
-            Waveform::Saw => lookups::SAW_LOOKUP,
-            Waveform::Square => lookups::SQUARE_LOOKUP,
-        };
-
-        (self.amount * lookup[self.frame] + 1)
-            .try_change_base()
-            .unwrap()
+        calculate_wave(self.waveform, self.amount, self.frame)
     }
 }
 
+fn calculate_wave(waveform: Waveform, amount: Num<i32, 12>, frame: usize) -> Num<u32, 8> {
+    let lookup = match waveform {
+        Waveform::Sine => lookups::SINE_LOOKUP,
+        Waveform::Saw => lookups::SAW_LOOKUP,
+        Waveform::Square => lookups::SQUARE_LOOKUP,
+    };
+
+    (amount * lookup[frame] + 1).try_change_base().unwrap()
+}
+
 struct EnvelopeState {
     frame: usize,
     envelope_id: usize,
     finished: bool,
     fadeout: Num<i32, 8>,
+
+    vibrato_pos: usize,
 }
 
 #[derive(Clone)]
@@ -249,6 +253,8 @@ impl<'track, TChannelId> TrackerInner<'track, TChannelId> {
                     envelope_id,
                     finished: false,
                     fadeout: sample.fadeout,
+
+                    vibrato_pos: 0,
                 });
             }
 
@@ -277,7 +283,12 @@ impl<'track, TChannelId> TrackerInner<'track, TChannelId> {
     }
 
     fn realise<M: Mixer<ChannelId = TChannelId>>(&mut self, mixer: &mut M) {
-        for (mixer_channel, tracker_channel) in self.mixer_channels.iter().zip(&mut self.channels) {
+        for (i, (mixer_channel, tracker_channel)) in self
+            .mixer_channels
+            .iter()
+            .zip(&mut self.channels)
+            .enumerate()
+        {
             tracker_channel.tick();
 
             if let Some(channel) = mixer_channel
@@ -288,6 +299,19 @@ impl<'track, TChannelId> TrackerInner<'track, TChannelId> {
 
                 if tracker_channel.vibrato.speed != 0 && tracker_channel.vibrato.enable {
                     current_speed *= tracker_channel.vibrato.value().change_base();
+                } else if let Some(envelope) = &mut self.envelopes[i] {
+                    let track_envelope = &self.track.envelopes[envelope.envelope_id];
+
+                    if track_envelope.vib_speed != 0 {
+                        current_speed *= calculate_wave(
+                            track_envelope.vib_waveform,
+                            track_envelope.vib_amount.change_base(),
+                            envelope.vibrato_pos,
+                        )
+                        .change_base();
+                        envelope.vibrato_pos =
+                            (envelope.vibrato_pos + track_envelope.vib_speed as usize) % 64;
+                    }
                 }
 
                 channel.playback(current_speed.change_base());

tracker/agb-xm-core/src/lib.rs

@@ -31,7 +31,12 @@ pub fn parse_module(module: &Module) -> agb_tracker_interop::Track {
 
         let envelope = &instrument.volume_envelope;
         let envelope_id = if envelope.enabled {
-            let envelope = EnvelopeData::new(envelope, module.default_bpm as u32);
+            let envelope = EnvelopeData::new(
+                envelope,
+                instrument,
+                module.frequency_type,
+                module.default_bpm as u32,
+            );
             let id = existing_envelopes
                 .entry(envelope)
                 .or_insert_with_key(|envelope| {
@@ -461,6 +466,10 @@ pub fn parse_module(module: &Module) -> agb_tracker_interop::Track {
             sustain: envelope.sustain,
             loop_start: envelope.loop_start,
             loop_end: envelope.loop_end,
+
+            vib_amount: envelope.vib_amount.try_change_base().unwrap(),
+            vib_waveform: envelope.vib_waveform,
+            vib_speed: envelope.vib_speed,
         })
         .collect::<Vec<_>>();
 
@@ -541,10 +550,19 @@ struct EnvelopeData {
     sustain: Option<usize>,
     loop_start: Option<usize>,
     loop_end: Option<usize>,
+
+    vib_waveform: Waveform,
+    vib_speed: u8,
+    vib_amount: Num<u32, 12>,
 }
 
 impl EnvelopeData {
-    fn new(e: &xmrs::envelope::Envelope, bpm: u32) -> Self {
+    fn new(
+        e: &xmrs::envelope::Envelope,
+        instrument: &xmrs::instr_default::InstrDefault,
+        frequency_type: FrequencyType,
+        bpm: u32,
+    ) -> Self {
         let mut amounts = vec![];
 
         for frame in 0..=(Self::envelope_frame_to_gba_frame(e.point.last().unwrap().frame, bpm)) {
@@ -587,11 +605,29 @@ impl EnvelopeData {
             (None, None)
         };
 
+        let vib_waveform = match instrument.vibrato.waveform {
+            xmrs::instr_vibrato::Waveform::Sine => Waveform::Sine,
+            xmrs::instr_vibrato::Waveform::Square => Waveform::Square,
+            xmrs::instr_vibrato::Waveform::RampUp => Waveform::Saw,
+            xmrs::instr_vibrato::Waveform::RampDown => Waveform::Saw,
+        };
+
+        let vib_speed = (instrument.vibrato.speed * 64.0) as u8;
+        let vib_depth = instrument.vibrato.depth * 16.0;
+
+        let c4_speed = note_to_speed(Note::C4, 0.0, 0, frequency_type);
+        let vib_amount =
+            note_to_speed(Note::C4, vib_depth.into(), 0, frequency_type) / c4_speed - 1;
+
         EnvelopeData {
             amounts,
             sustain,
             loop_start,
             loop_end,
+
+            vib_waveform,
+            vib_speed,
+            vib_amount,
         }
     }