volume handling refactor, part 1 - BEWARE

do not use these versions for production. your modules will break until this is finished!

only Amiga is done for now

src/engine/chipUtils.h

@@ -31,7 +31,7 @@ template<typename T> struct SharedChannel {
   int freq, baseFreq, baseNoteOverride, pitch, pitch2, arpOff;
   int ins, note;
   bool active, insChanged, freqChanged, fixedArp, keyOn, keyOff, portaPause, inPorta, volChanged;
-  T vol, outVol;
+  T vol, macroVol, outVol, maxVol;
   DivMacroInt std;
   void handleArp(int offset=0) {
     if (std.arp.had) {
@@ -61,6 +61,19 @@ template<typename T> struct SharedChannel {
     arpOff=0;
     baseNoteOverride=0;
     fixedArp=false;
+    if (active && !std.brokenOutVol()) {
+      if (which==NULL) {
+        if (macroVol!=maxVol) {
+          macroVol=maxVol;
+          volChanged=true;
+        }
+      } else if (which->std.volMacro.len==0) {
+        if (macroVol!=maxVol) {
+          macroVol=maxVol;
+          volChanged=true;
+        }
+      }
+    }
   }
   SharedChannel(T initVol):
     freq(0),
@@ -79,9 +92,11 @@ template<typename T> struct SharedChannel {
     keyOff(false),
     portaPause(false),
     inPorta(false),
-    volChanged(false),
+    volChanged(true),
     vol(initVol),
+    macroVol(initVol),
     outVol(initVol),
+    maxVol(initVol),
     std() {} 
 };
 

src/engine/macroInt.cpp

@@ -43,7 +43,6 @@ void DivMacroStruct::prepare(DivInstrumentMacro& source, DivEngine* e) {
   mode=source.mode;
   type=(source.open>>1)&3;
   activeRelease=source.open&8;
-  linger=(source.macroType==DIV_MACRO_VOL && e->song.volMacroLinger);
   lfoPos=LFO_PHASE;
 }
 
@@ -64,7 +63,7 @@ void DivMacroStruct::doMacro(DivInstrumentMacro& source, bool released, bool tic
   }
   if (delay>0) {
     delay--;
-    if (!linger) had=false;
+    had=false;
     return;
   }
   if (began && source.delay>0) {
@@ -98,8 +97,6 @@ void DivMacroStruct::doMacro(DivInstrumentMacro& source, bool released, bool tic
       if (pos>=source.len) {
         if (source.loop<source.len && (source.loop>=source.rel || source.rel>=source.len)) {
           pos=source.loop;
-        } else if (linger) {
-          pos--;
         } else {
           has=false;
         }
@@ -140,7 +137,7 @@ void DivMacroStruct::doMacro(DivInstrumentMacro& source, bool released, bool tic
           break;
         case 4: // end
           pos=0;
-          if (!linger) has=false;
+          has=false;
           break;
       }
       val=ADSR_LOW+((pos+(ADSR_HIGH-ADSR_LOW)*pos)>>8);
@@ -253,6 +250,11 @@ void DivMacroInt::setEngine(DivEngine* eng) {
   e=eng;
 }
 
+bool DivMacroInt::brokenOutVol() {
+  if (e==NULL) return false;
+  return e->song.brokenOutVol;
+}
+
 #define ADD_MACRO(m,s) \
   if (!m.masked) { \
     macroList[macroListLen]=&m; \

src/engine/macroInt.h

@@ -27,14 +27,13 @@ class DivEngine;
 struct DivMacroStruct {
   int pos, lastPos, lfoPos, delay;
   int val;
-  bool has, had, actualHad, finished, will, linger, began, masked, activeRelease;
+  bool has, had, actualHad, finished, will, began, masked, activeRelease;
   unsigned int mode, type;
   unsigned char macroType;
   void doMacro(DivInstrumentMacro& source, bool released, bool tick);
   void init() {
     pos=lastPos=lfoPos=mode=type=delay=0;
     has=had=actualHad=will=false;
-    linger=false;
     began=true;
     // TODO: test whether this breaks anything?
     val=0;
@@ -51,7 +50,6 @@ struct DivMacroStruct {
     actualHad(false),
     finished(false),
     will(false),
-    linger(false),
     began(true),
     masked(false),
     activeRelease(false),
@@ -109,6 +107,12 @@ class DivMacroInt {
     // state
     bool hasRelease;
 
+    /**
+     * get whether brokenOutVol is enabled.
+     * @return the value of brokenOutVol, or false if not bound to an engine.
+     */
+    bool brokenOutVol();
+
     /**
      * set mask on macro.
      */

src/engine/platform/amiga.cpp

@@ -68,17 +68,6 @@ const char** DivPlatformAmiga::getRegisterSheet() {
   return regCheatSheetAmiga;
 }
 
-#define writeAudDat(x) \
-  chan[i].audDat=x; \
-  if (i<3 && chan[i].useV) { \
-    chan[i+1].outVol=(unsigned char)chan[i].audDat^0x80; \
-    if (chan[i+1].outVol>64) chan[i+1].outVol=64; \
-  } \
-  if (i<3 && chan[i].useP) { \
-    chan[i+1].freq=(unsigned char)chan[i].audDat^0x80; \
-    if (chan[i+1].freq<AMIGA_DIVIDER) chan[i+1].freq=AMIGA_DIVIDER; \
-  }
-
 void DivPlatformAmiga::acquire(short** buf, size_t len) {
   thread_local int outL, outR, output;
   for (size_t h=0; h<len; h++) {
@@ -359,8 +348,8 @@ void DivPlatformAmiga::tick(bool sysTick) {
   for (int i=0; i<4; i++) {
     chan[i].std.next();
     if (chan[i].std.vol.had) {
-      chan[i].outVol=((chan[i].vol%65)*MIN(64,chan[i].std.vol.val))>>6;
+      chan[i].macroVol=chan[i].std.vol.val;
-      chan[i].writeVol=true;
+      chan[i].volChanged=true;
     }
     double off=1.0;
     if (!chan[i].useWave && chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
@@ -516,8 +505,9 @@ void DivPlatformAmiga::tick(bool sysTick) {
   }
 
   for (int i=0; i<4; i++) {
-    if (chan[i].writeVol) {
+    if (chan[i].volChanged) {
-      chan[i].writeVol=false;
+      chan[i].outVol=((chan[i].vol%65)*MIN(64,chan[i].macroVol))>>6;
+      chan[i].volChanged=false;
       chWrite(i,8,chan[i].outVol);
     }
     if (chan[i].updateWave) {
@@ -585,10 +575,6 @@ int DivPlatformAmiga::dispatch(DivCommand c) {
       chan[c.chan].active=true;
       chan[c.chan].keyOn=true;
       chan[c.chan].macroInit(ins);
-      if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
-        chan[c.chan].outVol=chan[c.chan].vol;
-        chan[c.chan].writeVol=true;
-      }
       if (chan[c.chan].useWave) {
         chan[c.chan].ws.init(ins,chan[c.chan].audLen<<1,255,chan[c.chan].insChanged);
         chan[c.chan].updateWave=true;
@@ -615,17 +601,12 @@ int DivPlatformAmiga::dispatch(DivCommand c) {
     case DIV_CMD_VOLUME:
       if (chan[c.chan].vol!=c.value) {
         chan[c.chan].vol=c.value;
-        if (!chan[c.chan].std.vol.has) {
+        if (!parent->song.volMacroLinger) chan[c.chan].macroVol=chan[c.chan].maxVol;
-          chan[c.chan].outVol=c.value;
+        chan[c.chan].volChanged=true;
-          chan[c.chan].writeVol=true;
-        }
       }
       break;
     case DIV_CMD_GET_VOLUME:
-      if (chan[c.chan].std.vol.has) {
+      return chan[c.chan].vol;
-        return chan[c.chan].vol;
-      }
-      return chan[c.chan].outVol;
       break;
     case DIV_CMD_PITCH:
       chan[c.chan].pitch=c.value;

src/engine/platform/amiga.h

@@ -30,7 +30,7 @@ class DivPlatformAmiga: public DivDispatch {
     int audSub;
     unsigned char volPos;
     int sample, wave;
-    bool useWave, setPos, useV, useP, dmaOn, audDatClock, writeVol, updateWave;
+    bool useWave, setPos, useV, useP, dmaOn, audDatClock, updateWave;
     DivWaveSynth ws;
     Channel():
       SharedChannel<signed char>(64),
@@ -49,7 +49,6 @@ class DivPlatformAmiga: public DivDispatch {
       useP(false),
       dmaOn(false),
       audDatClock(false),
-      writeVol(true),
       updateWave(true) {}
   };
   Channel chan[4];