add detune effect

LTVA1 · Apr 1, 2024 · 4486a44 · 4486a44
1 parent 5a011f4
commit 4486a44
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Showing 4 changed files with 10 additions and 2 deletions.
diff --git a/tracker_engine/do_effects.c b/tracker_engine/do_effects.c
@@ -457,6 +457,11 @@ void do_command(
         break;
     }
 
+    case TE_EFFECT_PITCH: {
+        te_channel->finetune_note = ((int16_t)(opcode & 0xff) - 0x80) * 2;
+        break;
+    }
+
     case TE_EFFECT_ARPEGGIO_ABS: {
         te_channel->arpeggio_note = 0;
         te_channel->fixed_note = ((opcode & 0xff) << 8);

diff --git a/tracker_engine/tracker_engine.c b/tracker_engine/tracker_engine.c
@@ -444,7 +444,8 @@ void tracker_engine_advance_channel(TrackerEngine* tracker_engine, uint8_t chan)
 
         int32_t chn_note = (int16_t)(te_channel->fixed_note != 0xffff ? te_channel->fixed_note :
                                                                         te_channel->note) +
-                           vib + ((int16_t)te_channel->arpeggio_note << 8);
+                           vib + ((int16_t)te_channel->arpeggio_note << 8) 
+                           + te_channel->finetune_note;
 
         if(chn_note < 0) {
             chn_note = 0;

diff --git a/tracker_engine/tracker_engine_defs.h b/tracker_engine/tracker_engine_defs.h
@@ -98,8 +98,8 @@ typedef enum {
 
     TE_EFFECT_PORTA_UP_SEMITONE = 0x1d00, // Txx
     TE_EFFECT_PORTA_DOWN_SEMITONE = 0x1e00, // Uxx
+    TE_EFFECT_PITCH = 0x1f00, //Vxx
     /*
-    TE_EFFECT_ = 0x1f00, //Vxx
     TE_EFFECT_ = 0x2000, //Wxx
     */
 
@@ -155,6 +155,7 @@ typedef struct {
     uint8_t channel_flags;
 
     uint16_t note, target_note, last_note, fixed_note;
+    int16_t finetune_note;
     int16_t arpeggio_note;
 
     uint8_t volume;

diff --git a/view/opcode_description.c b/view/opcode_description.c
@@ -56,6 +56,7 @@ static const OpcodeDescription opcode_desc[] = {
     {TE_EFFECT_SET_HARD_SYNC_SRC, 0x7f00, "SET HARD SYNC SOURCE CHANNEL", "S.SRC"},
     {TE_EFFECT_PORTA_UP_SEMITONE, 0x7f00, "PORTAMENTO UP (SEMITONES)", "PU.SEM"},
     {TE_EFFECT_PORTA_DOWN_SEMITONE, 0x7f00, "PORTAMENTO DOWN (SEMITONES)", "PD.SEM"},
+    {TE_EFFECT_PITCH, 0x7f00, "DETUNE 80=CENT.,0=-1SEM,FF=+1SEM", "DETUNE"},
     {TE_EFFECT_LEGATO, 0x7f00, "LEGATO", "LEGATO"},
     {TE_EFFECT_ARPEGGIO_ABS, 0x7f00, "ABSOLUTE ARPEGGIO NOTE", ""},
     {TE_EFFECT_TRIGGER_RELEASE, 0x7f00, "TRIGGER RELEASE", "TR.REL"},