From 3163730fe8e1436938597249e9f2aada7c4ca152 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Wed, 16 Mar 2022 17:01:44 -0500
Subject: [PATCH] prepare for drum kits/sample map

---
 papers/format.md          |  7 ++++++
 src/engine/engine.h       |  4 +--
 src/engine/instrument.cpp | 16 ++++++++++++
 src/engine/instrument.h   |  9 ++++++-
 src/gui/insEdit.cpp       | 53 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 86 insertions(+), 3 deletions(-)

diff --git a/papers/format.md b/papers/format.md
index 503099b99..9afa4b47e 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -494,6 +494,13 @@ size | description
   2  | kick frequency
   2  | snare/hi-hat frequency
   2  | tom/top frequency
+ --- | **Sample instrument extra data** (>=67)
+  1  | use note map
+     | - only read the following two data structures if this is true!
+ 4?? | note frequency × 120
+     | - 480 bytes
+ 2?? | note sample × 120
+     | - 240 bytes
 ```
 
 # wavetable
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 9e31e5636..a3ac2c249 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -37,8 +37,8 @@
     warnings+=(String("\n")+x); \
   }
 
-#define DIV_VERSION "dev66"
-#define DIV_ENGINE_VERSION 66
+#define DIV_VERSION "dev67"
+#define DIV_ENGINE_VERSION 67
 
 // for imports
 #define DIV_VERSION_MOD 0xff01
diff --git a/src/engine/instrument.cpp b/src/engine/instrument.cpp
index b22fdced2..785c9b19d 100644
--- a/src/engine/instrument.cpp
+++ b/src/engine/instrument.cpp
@@ -378,6 +378,13 @@ void DivInstrument::putInsData(SafeWriter* w) {
   w->writeS(fm.kickFreq);
   w->writeS(fm.snareHatFreq);
   w->writeS(fm.tomTopFreq);
+
+  // sample map
+  w->writeC(amiga.useNoteMap);
+  if (amiga.useNoteMap) {
+    w->write(amiga.noteFreq,120*sizeof(unsigned int));
+    w->write(amiga.noteMap,120*sizeof(short));
+  }
 }
 
 DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version) {
@@ -717,6 +724,15 @@ DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version) {
     std.dutyMacroRel=-1;
   }
 
+  // sample map
+  if (version>=67) {
+    amiga.useNoteMap=reader.readC();
+    if (amiga.useNoteMap) {
+      reader.read(amiga.noteFreq,120*sizeof(unsigned int));
+      reader.read(amiga.noteMap,120*sizeof(short));
+    }
+  }
+
   return DIV_DATA_SUCCESS;
 }
 
diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index e4613c8b9..97d64da00 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -373,9 +373,16 @@ struct DivInstrumentC64 {
 
 struct DivInstrumentAmiga {
   short initSample;
+  bool useNoteMap;
+  int noteFreq[120];
+  short noteMap[120];
 
   DivInstrumentAmiga():
-    initSample(0) {}
+    initSample(0),
+    useNoteMap(false) {
+    memset(noteMap,-1,120*sizeof(short));
+    memset(noteFreq,0,120*sizeof(int));
+  }
 };
 
 struct DivInstrument {
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index e7fe917ac..6e0635a99 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -1467,6 +1467,59 @@ void FurnaceGUI::drawInsEdit() {
             }
             ImGui::EndCombo();
           }
+          P(ImGui::Checkbox("Use sample map (does not work yet!)",&ins->amiga.useNoteMap));
+          if (ins->amiga.useNoteMap) {
+            if (ImGui::BeginTable("NoteMap",3,ImGuiTableFlags_ScrollY|ImGuiTableFlags_Borders|ImGuiTableFlags_SizingStretchSame)) {
+              ImGui::TableSetupColumn("c0",ImGuiTableColumnFlags_WidthFixed);
+              ImGui::TableSetupColumn("c1",ImGuiTableColumnFlags_WidthStretch);
+              ImGui::TableSetupColumn("c2",ImGuiTableColumnFlags_WidthStretch);
+
+              ImGui::TableSetupScrollFreeze(0,1);
+
+              ImGui::TableNextRow(ImGuiTableRowFlags_Headers);
+              ImGui::TableNextColumn();
+              ImGui::TableNextColumn();
+              ImGui::Text("Sample");
+              ImGui::TableNextColumn();
+              ImGui::Text("Frequency");
+              for (int i=0; i<120; i++) {
+                ImGui::TableNextRow();
+                ImGui::PushID(fmt::sprintf("NM_%d",i).c_str());
+                ImGui::TableNextColumn();
+                ImGui::Text("%s",noteNames[60+i]);
+                ImGui::TableNextColumn();
+                if (ins->amiga.noteMap[i]<0 || ins->amiga.noteMap[i]>=e->song.sampleLen) {
+                  sName="-- empty --";
+                  ins->amiga.noteMap[i]=-1;
+                } else {
+                  sName=e->song.sample[ins->amiga.noteMap[i]]->name;
+                }
+                ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+                if (ImGui::BeginCombo("##SM",sName.c_str())) {
+                  String id;
+                  if (ImGui::Selectable("-- empty --",ins->amiga.noteMap[i]==-1)) { PARAMETER
+                    ins->amiga.noteMap[i]=-1;
+                  }
+                  for (int j=0; j<e->song.sampleLen; j++) {
+                    id=fmt::sprintf("%d: %s",j,e->song.sample[j]->name);
+                    if (ImGui::Selectable(id.c_str(),ins->amiga.noteMap[i]==j)) { PARAMETER
+                      ins->amiga.noteMap[i]=j;
+                      if (ins->amiga.noteFreq[i]<=0) ins->amiga.noteFreq[i]=(int)((double)e->song.sample[j]->centerRate*pow(2.0,((double)i-60.0)/12.0));
+                    }
+                  }
+                  ImGui::EndCombo();
+                }
+                ImGui::TableNextColumn();
+                ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+                if (ImGui::InputInt("##SF",&ins->amiga.noteFreq[i],50,500)) { PARAMETER
+                  if (ins->amiga.noteFreq[i]<0) ins->amiga.noteFreq[i]=0;
+                  if (ins->amiga.noteFreq[i]>262144) ins->amiga.noteFreq[i]=262144;
+                }
+                ImGui::PopID();
+              }
+              ImGui::EndTable();
+            }
+          }
           ImGui::EndTabItem();
         }
         if (ImGui::BeginTabItem("Macros")) {