From 2fe371e543c71a0958965c4017e6a637db3f8869 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Wed, 26 Jun 2024 04:06:31 -0500
Subject: [PATCH] IT import: accept songs without instruments

---
 src/engine/fileOps/it.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/engine/fileOps/it.cpp b/src/engine/fileOps/it.cpp
index 09e250f39..a8f7dd6e5 100644
--- a/src/engine/fileOps/it.cpp
+++ b/src/engine/fileOps/it.cpp
@@ -477,6 +477,14 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
 
       if (samplePtr[i]==0) {
         ds.sample.push_back(s);
+
+        // does the song not use instruments?
+        // create instrument then
+        if (ds.insLen==0) {
+          DivInstrument* ins=new DivInstrument;
+          ins->type=DIV_INS_ES5506;
+          ds.ins.push_back(ins);
+        }
         continue;
       }
 
@@ -636,9 +644,21 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
         }
       }
 
+      // does the song not use instruments?
+      // create instrument then
+      if (ds.insLen==0) {
+        DivInstrument* ins=new DivInstrument;
+        ins->name=s->name;
+        ins->type=DIV_INS_ES5506;
+        ins->amiga.initSample=i;
+        ds.ins.push_back(ins);
+      }
+
       ds.sample.push_back(s);
     }
 
+    ds.insLen=ds.ins.size();
+
     // read patterns
     int maxChan=0;
     for (int i=0; i<patCount; i++) {