GUI: better DPCM mapping, part 2

doc/4-instrument/nes.md

@@ -1,6 +1,41 @@
 # NES instrument editor
 
-the instrument editor for NES consists of these macros:
+the NES instrument editor consists of two tabs.
+
+## DPCM
+
+this tab is somewhat similar to [the Sample instrument editor](sample.md), but it has been tailored for use with NES' DPCM channel.
+
+- **Sample**: specifies which sample should be assigned to the instrument.
+- **Use sample map**: enables mapping different samples to notes. see next section for more information.
+  - when this option is disabled, 16 notes (from C-0 to D#1 and repeating) will map to the DPCM channel's 16 possible pitches.
+
+### sample map
+
+the sample map allows you to set a sample for each note.
+
+after enabling this option, a table appears with the contents of the sample map.
+- the first column represents the input note.
+- the second column allows you to type in a sample number for each note.
+  - you may press Delete to clear it.
+- the third one is used to set the DPCM pitch at which the specified sample will play.
+  - for possible values, refer to the table below.
+  - you may press Delete to clear it. if no value is specified, the last pitch is used.
+- the fourth column allows you to set the initial delta counter value when playing the sample.
+  - this is an hexadecimal number.
+  - the range is `00` to `7F`.
+  - you may press Delete to clear it. if no value is specified, the delta counter isn't altered.
+- the fifth and last column provides a combo box for selecting a sample.
+
+you may right-click anywhere in the number, pitch and delta columns for additional options:
+- **set entire map to this pitch**: sets the DPCM pitch of all notes to the selected cell's.
+- **set entire map to this delta counter value**: sets the initial delta counter value of all notes to the selected cell's.
+- **set entire map to this sample**: sets the sample number of all notes to the selected cell's.
+- **reset pitches**: resets the sample map's DPCM pitches to defaults (15).
+- **clear delta counter values**: removes all delta counter values from the map.
+- **clear map samples**: removes all samples from the map.
+
+## Macros
 
 - **Volume**: volume sequence.
 - **Arpeggio**: pitch sequence.

doc/4-instrument/sample.md

@@ -4,7 +4,7 @@ the Generic Sample instrument editor consists of a sample selector and several m
 
 ## Sample
 
-- **Initial sample**: specifies which sample should be assigned to the instrument.
+- **Sample**: specifies which sample should be assigned to the instrument.
 - **Use wavetable**: uses wavetable instead of a sample.
   - only available in Amiga and Generic PCM DAC.
 - **Use sample map**: enables mapping different samples to notes. see next section for more information.

papers/format.md

@@ -360,7 +360,8 @@ size | description
   1  | broken portamento during legato
   1  | broken macro during note off in some FM chips (>=155)
   1  | pre note (C64) does not compensate for portamento or legato (>=168)
-  5  | reserved
+  1  | disable new NES DPCM features (>=183)
+  4  | reserved
  --- | **speed pattern of first song** (>=139)
   1  | length of speed pattern (fail if this is lower than 0 or higher than 16)
  16  | speed pattern (this overrides speed 1 and speed 2 settings)

papers/newIns.md

@@ -145,6 +145,7 @@ the following feature codes are recognized:
 - `SU`: Sound Unit ins data
 - `ES`: ES5506 ins data
 - `X1`: X1-010 ins data
+- `NE`: NES DPCM sample map data
 - `EN`: end of features
   - if you find this feature code, stop reading the instrument.
   - it will usually appear only when there sample/wave lists.
@@ -585,3 +586,25 @@ size | description
 -----|------------------------------------
   4  | bank slot
 ```
+
+# NES DPCM sample map data (NE)
+
+```
+size | description
+-----|------------------------------------
+  1  | use sample map
+ 2?? | DPCM sample map... (120 entries)
+     | - only read if sample map is enabled
+```
+
+the DPCM sample map format:
+
+```
+size | description
+-----|------------------------------------
+  1  | pitch (0-15; otherwise no change)
+  1  | delta counter value (0-127; otherwise no change)
+```
+
+if some fields are missing, that's because they are defined in the SM feature.
+NES instruments with DPCM sample maps have both SM and NE features.

src/engine/fileOps.cpp

@@ -184,6 +184,7 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
       ds.snNoLowPeriods=true;
       ds.disableSampleMacro=true;
       ds.preNoteNoEffect=true;
+      ds.oldDPCM=true;
       ds.delayBehavior=0;
       ds.jumpTreatment=2;
 
@@ -1856,6 +1857,9 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
     if (ds.version<168) {
       ds.preNoteNoEffect=true;
     }
+    if (ds.version<183) {
+      ds.oldDPCM=true;
+    }
     ds.isDMF=false;
 
     reader.readS(); // reserved
@@ -2374,7 +2378,12 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       } else {
         reader.readC();
       }
-      for (int i=0; i<5; i++) {
+      if (ds.version>=183) {
+        ds.oldDPCM=reader.readC();
+      } else {
+        reader.readC();
+      }
+      for (int i=0; i<4; i++) {
         reader.readC();
       }
     }
@@ -5438,7 +5447,8 @@ SafeWriter* DivEngine::saveFur(bool notPrimary, bool newPatternFormat) {
   w->writeC(song.brokenPortaLegato);
   w->writeC(song.brokenFMOff);
   w->writeC(song.preNoteNoEffect);
-  for (int i=0; i<5; i++) {
+  w->writeC(song.oldDPCM);
+  for (int i=0; i<4; i++) {
     w->writeC(0);
   }
 

src/engine/instrument.h

@@ -486,8 +486,8 @@ struct DivInstrumentAmiga {
   }
 
   /**
-   * get the sample frequency at specified note.
+   * get the sample playback note at specified note.
-   * @return the frequency, or -1 if not using note map.
+   * @return the note, or -1 if not using note map.
    */
   inline int getFreq(int note) {
     if (useNoteMap) {
@@ -498,6 +498,32 @@ struct DivInstrumentAmiga {
     return note;
   }
 
+  /**
+   * get the DPCM pitch at specified note.
+   * @return the pitch, or -1 if not using note map.
+   */
+  inline signed char getDPCMFreq(int note) {
+    if (useNoteMap) {
+      if (note<0) note=0;
+      if (note>119) note=119;
+      return noteMap[note].dpcmFreq;
+    }
+    return -1;
+  }
+
+  /**
+   * get the DPCM delta counter value at specified note.
+   * @return the delta counter value, or -1 if not using note map.
+   */
+  inline signed char getDPCMDelta(int note) {
+    if (useNoteMap) {
+      if (note<0) note=0;
+      if (note>119) note=119;
+      return noteMap[note].dpcmDelta;
+    }
+    return -1;
+  }
+
   DivInstrumentAmiga():
     initSample(0),
     useNoteMap(false),

src/engine/platform/nes.cpp

@@ -343,6 +343,10 @@ void DivPlatformNES::tick(bool sysTick) {
           } else {
             rWrite(0x4010,calcDPCMRate(dacRate)|(goingToLoop?0x40:0));
           }
+          if (nextDPCMDelta>=0) {
+            rWrite(0x4011,nextDPCMDelta);
+            nextDPCMDelta=-1;
+          }
           rWrite(0x4012,(dpcmAddr>>6)&0xff);
           rWrite(0x4013,dpcmLen&0xff);
           rWrite(0x4015,31);
@@ -373,12 +377,39 @@ int DivPlatformNES::dispatch(DivCommand c) {
   switch (c.cmd) {
     case DIV_CMD_NOTE_ON:
       if (c.chan==4) { // PCM
-        DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_STD);
+        DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_NES);
-        if (ins->type==DIV_INS_AMIGA) {
+        if (ins->type==DIV_INS_AMIGA || (ins->type==DIV_INS_NES && !parent->song.oldDPCM)) {
+          if (ins->type==DIV_INS_NES) {
+            if (!dpcmMode) {
+              dpcmMode=true;
+              if (dumpWrites) addWrite(0xffff0002,0);
+              dacSample=-1;
+              rWrite(0x4015,15);
+              rWrite(0x4010,0);
+              rWrite(0x4012,0);
+              rWrite(0x4013,0);
+              rWrite(0x4015,31);
+            }
+
+            if (ins->amiga.useNoteMap) {
+              nextDPCMFreq=ins->amiga.getDPCMFreq(c.value);
+              if (nextDPCMFreq<0 || nextDPCMFreq>15) nextDPCMFreq=lastDPCMFreq;
+              lastDPCMFreq=nextDPCMFreq;
+              nextDPCMDelta=ins->amiga.getDPCMDelta(c.value);
+            } else {
+              if (c.value==DIV_NOTE_NULL) {
+                nextDPCMFreq=lastDPCMFreq;
+              } else {
+                nextDPCMFreq=c.value&15;
+              }
+            }
+          }
           if (c.value!=DIV_NOTE_NULL) {
             dacSample=ins->amiga.getSample(c.value);
+            if (ins->type==DIV_INS_AMIGA) {
               c.value=ins->amiga.getFreq(c.value);
             }
+          }
           if (dacSample<0 || dacSample>=parent->song.sampleLen) {
             dacSample=-1;
             if (dumpWrites && !dpcmMode) addWrite(0xffff0002,0);
@@ -452,7 +483,7 @@ int DivPlatformNES::dispatch(DivCommand c) {
       }
       chan[c.chan].active=true;
       chan[c.chan].keyOn=true;
-      chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_STD));
+      chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_NES));
       if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
         chan[c.chan].outVol=chan[c.chan].vol;
       }
@@ -614,7 +645,7 @@ int DivPlatformNES::dispatch(DivCommand c) {
       break;
     case DIV_CMD_PRE_PORTA:
       if (chan[c.chan].active && c.value2) {
-        if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_STD));
+        if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_NES));
       }
       if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) chan[c.chan].baseFreq=NOTE_PERIODIC(chan[c.chan].note);
       chan[c.chan].inPorta=c.value;
@@ -700,6 +731,8 @@ void DivPlatformNES::reset() {
   goingToLoop=false;
   countMode=false;
   nextDPCMFreq=-1;
+  nextDPCMDelta=-1;
+  lastDPCMFreq=15;
   linearCount=255;
 
   if (useNP) {

src/engine/platform/nes.h

@@ -54,6 +54,8 @@ class DivPlatformNES: public DivDispatch {
   unsigned char apuType;
   unsigned char linearCount;
   signed char nextDPCMFreq;
+  signed char nextDPCMDelta;
+  signed char lastDPCMFreq;
   bool dpcmMode;
   bool dpcmModeDefault;
   bool dacAntiClickOn;

src/engine/song.h

@@ -377,6 +377,7 @@ struct DivSong {
   bool brokenPortaLegato;
   bool brokenFMOff;
   bool preNoteNoEffect;
+  bool oldDPCM;
 
   std::vector<DivInstrument*> ins;
   std::vector<DivWavetable*> wave;
@@ -496,7 +497,8 @@ struct DivSong {
     patchbayAuto(true),
     brokenPortaLegato(false),
     brokenFMOff(false),
-    preNoteNoEffect(false) {
+    preNoteNoEffect(false),
+    oldDPCM(false) {
     for (int i=0; i<DIV_MAX_CHIPS; i++) {
       system[i]=DIV_SYSTEM_NULL;
       systemVol[i]=1.0;

src/gui/compatFlags.cpp

@@ -188,6 +188,10 @@ void FurnaceGUI::drawCompatFlags() {
         if (ImGui::IsItemHovered()) {
           ImGui::SetTooltip("behavior changed in 0.6pre9");
         }
+        ImGui::Checkbox("Disable new NES DPCM features",&e->song.oldDPCM);
+        if (ImGui::IsItemHovered()) {
+          ImGui::SetTooltip("behavior changed in 0.6.1");
+        }
         ImGui::EndTabItem();
       }
       if (ImGui::BeginTabItem(".mod import")) {

src/gui/insEdit.cpp

@@ -2313,6 +2313,16 @@ void FurnaceGUI::insTabSample(DivInstrument* ins) {
   if (ins->type==DIV_INS_SU) sampleTabName="Sound Unit";
   if (ins->type==DIV_INS_NES) sampleTabName="DPCM";
   if (ImGui::BeginTabItem(sampleTabName)) {
+    if (ins->type==DIV_INS_NES && e->song.oldDPCM) {
+      ImGui::Text("new DPCM features disabled (compatibility)!");
+      if (ImGui::Button("click here to enable them.")) {
+        e->song.oldDPCM=false;
+        MARK_MODIFIED;
+      }
+      ImGui::EndTabItem();
+      return;
+    }
+
     String sName;
     bool wannaOpenSMPopup=false;
     if (ins->amiga.initSample<0 || ins->amiga.initSample>=e->song.sampleLen) {
@@ -2401,7 +2411,7 @@ void FurnaceGUI::insTabSample(DivInstrument* ins) {
         ImGui::Text("#");
         if (ins->type==DIV_INS_NES) {
           ImGui::TableNextColumn();
-          ImGui::Text("freq");
+          ImGui::Text("pitch");
           ImGui::TableNextColumn();
           ImGui::Text("delta");
         } else {
@@ -2674,9 +2684,21 @@ void FurnaceGUI::insTabSample(DivInstrument* ins) {
     if (ImGui::BeginPopup("SampleMapUtils",ImGuiWindowFlags_NoMove|ImGuiWindowFlags_AlwaysAutoResize|ImGuiWindowFlags_NoTitleBar|ImGuiWindowFlags_NoSavedSettings)) {
       if (sampleMapSelStart==sampleMapSelEnd && sampleMapSelStart>=0 && sampleMapSelStart<120) {
         if (ins->type==DIV_INS_NES) {
-          if (ImGui::MenuItem("set entire map to this frequency")) {
+          if (ImGui::MenuItem("set entire map to this pitch")) {
+            if (sampleMapSelStart>=0 && sampleMapSelStart<120) {
+              for (int i=0; i<120; i++) {
+                if (i==sampleMapSelStart) continue;
+                ins->amiga.noteMap[i].dpcmFreq=ins->amiga.noteMap[sampleMapSelStart].dpcmFreq;
+              }
+            }
           }
           if (ImGui::MenuItem("set entire map to this delta counter value")) {
+            if (sampleMapSelStart>=0 && sampleMapSelStart<120) {
+              for (int i=0; i<120; i++) {
+                if (i==sampleMapSelStart) continue;
+                ins->amiga.noteMap[i].dpcmDelta=ins->amiga.noteMap[sampleMapSelStart].dpcmDelta;
+              }
+            }
           }
         } else {
           if (ImGui::MenuItem("set entire map to this note")) {
@@ -2698,9 +2720,15 @@ void FurnaceGUI::insTabSample(DivInstrument* ins) {
         }
       }
       if (ins->type==DIV_INS_NES) {
-        if (ImGui::MenuItem("clear frequencies")) {
+        if (ImGui::MenuItem("reset pitches")) {
+          for (int i=0; i<120; i++) {
+            ins->amiga.noteMap[i].dpcmFreq=15;
+          }
         }
         if (ImGui::MenuItem("clear delta counter values")) {
+          for (int i=0; i<120; i++) {
+            ins->amiga.noteMap[i].dpcmDelta=-1;
+          }
         }
       } else {
         if (ImGui::MenuItem("reset notes")) {