1 files changed, 45 insertions, 0 deletions
diff --git a/src/portmod.rs b/src/portmod.rs
index a271ead..38c353b 100644
--- a/src/portmod.rs
+++ b/src/portmod.rs
@@ -65,6 +65,51 @@ pub enum Effect
     NoEffect
 }
 
+pub enum LoopMode {
+    NoLoop,
+    ForwardLoop,
+    PingPongLoop
+}
+
+pub enum NoteCommand {
+    NoteOn(u8),
+    NoteOff,
+    NoteCut,
+    NoteFade,
+}
+
+pub struct Cell {
+    pub note: Option<NoteCommand>,
+    pub inst: Option<u8>,
+    pub vol: Effect,
+    pub efx: Effect
+}
+
+impl Cell
+{
+    pub fn from_it_cell(cell: &crate::itfile::Cell) -> Cell {
+        let note = if cell.mask & 0x11 != 0 {
+            let cmd = match cell.note {
+                0xff => NoteCommand::NoteOff,
+                0xfe => NoteCommand::NoteCut,
+                0x78..0xfe => NoteCommand::NoteFade,
+                _ => NoteCommand::NoteOn(cell.note)
+            };
+            Some(cmd)
+        } else { None };
+        let inst = if cell.mask & 0x22 != 0 {
+            Some(cell.inst)
+        } else { None };
+        let vol = if cell.mask & 0x44 != 0 {
+            Effect::from_it_vol(cell.vol)
+        } else { Effect::NoEffect };
+        let efx = if cell.mask & 0x88 != 0 {
+            Effect::from_it_efx((cell.efx, cell.fxp))
+        } else { Effect::NoEffect };
+        Cell{note, inst, vol, efx}
+    }
+}
+
 impl Effect
 {
     pub fn from_it_efx(f: (u8, u8)) -> Effect