Amiga: validation export sample/wave book

tiny optimization

src/asm/68k/amigatest/README.md

@@ -33,6 +33,9 @@ run `player` on Amiga. it should play the exported song.
   - x: loc
   - y: len
 - 01 xxxxxx yyyy: initialize wavetable (xxxx: pos; yy: length)
+- 02 xx: set loc/len from sample book
+- 03 xx: initialize wavetable from wave book
+- 04 xxxx: initialize wavetable from wave book (short)
 - 06 xxxx: set period
 - 08 xx: set volume
 - 0a xxxx: set data

src/asm/68k/amigatest/player.s

@@ -174,6 +174,7 @@ testChannel:
   andi.b #15,d0
   ; check for 0
   bne chanNotZero
+sampleWrite:
   ; write loc/len
   move.w #$f0f,d4
   move.w d4,COLOR00
@@ -200,15 +201,38 @@ testChannel:
 chanNotZero:
   ; check for 8 (VOL)
   cmp.b #8,d0
-  bne chanWaveChange
+  bne chanSampleBook
   ; write volume
   clr.w d2
   move.b (a2)+,d2
   bra chanWrite
+chanSampleBook:
+  ; check for 2 (loc/len from book)
+  cmp.b #2,d0
+  bne chanWaveChange
+
+  move.w #$f0f,d4
+  move.w d4,COLOR00
+  clr.l d3
+  move.b (a2)+,d3
+  bsr getSampleBook
+
+  ; write loc/len
+  lea sampleData,a0
+  add.l a0,d2
+  lea chipBase,a0
+  move.b d1,d0
+  andi.l #$f0,d0
+  addi.l #$a0,d0
+  adda.l d0,a0
+  move.l d2,(a0)+ ; location
+  move.w d3,(a0) ; length
+
+  bra nextTick1
 chanWaveChange:
   ; check for 1 (wave change)
   cmp.b #1,d0
-  bne chanOther
+  bne chanWaveBookB
   ; copy wave
   clr.l d2
   move.b (a2)+,d2
@@ -229,14 +253,41 @@ chanWaveChange:
   lsl.l #8,d2
   or.b (a2)+,d2
 
-  ; don't copy a zero-length wave
-  tst.l d2
-  beq nextTick1
-copyWave:
-  move.w (a0)+,(a1)+
-  subq.l #2,d2
-  bne copyWave
+  bsr copyWave
+  bra nextTick1
+chanWaveBookB:
+  ; check for 3 (wave change from book)
+  cmp.b #3,d0
+  bne chanWaveBookW
 
+  clr.l d3
+  move.b (a2)+,d3
+  bsr getWaveBook
+
+  lea sampleData,a1
+  andi.l #$30,d1
+  lsl.l #4,d1
+  adda.l d1,a1
+
+  bsr copyWave
+  bra nextTick1
+chanWaveBookW:
+  ; check for 4 (wave change from book short)
+  cmp.b #4,d0
+  bne chanOther
+
+  clr.l d3
+  move.b (a2)+,d3
+  lsl.l #8,d3
+  or.b (a2)+,d3
+  bsr getWaveBook
+
+  lea sampleData,a1
+  andi.l #$30,d1
+  lsl.l #4,d1
+  adda.l d1,a1
+
+  bsr copyWave
   bra nextTick1
 chanOther:
   ; get value and write
@@ -263,6 +314,45 @@ endTick:
   move.w d4,COLOR00
   rts
 
+; a0: source. a1: destination. d2: length.
+copyWave:
+  ; don't copy a zero-length wave
+  tst.l d2
+  beq noCopy
+copyWaveLoop:
+  move.w (a0)+,(a1)+
+  subq.l #2,d2
+  bne copyWaveLoop
+noCopy:
+  rts
+
+; put wave book entry in a0/d2. d3: index (modified).
+getWaveBook:
+  lea waveBook(pc),a3
+  lsl.l #2,d3
+  move.l (a3,d3),d2
+  move.l d2,d3
+  rol.l #8,d2
+  andi.l #$ff,d2
+  bne getWaveBook2
+  move.w #$100,d2
+getWaveBook2:
+  andi.l #$ffffff,d3
+  add.l #wavetable,d3
+  move.l d3,a0
+  rts
+
+; get sample book entry in d2/d3. d3: index.
+getSampleBook:
+  lea sampleBook(pc),a3
+  lsl.l #3,d3
+  adda.l d3,a3
+  move.l (a3)+,d2
+  move.l (a3)+,d3
+  andi.l #$ffffff,d2
+  andi.l #$ffff,d3
+  rts
+
 data_c
   cnop 0,4
 
@@ -272,24 +362,27 @@ curColor:
 state:
   dc.w 0 ; ticks
   dc.w 0 ; quit
-
   cnop 0,4
 
 seqAddr:
   dc.l 0
+  cnop 0,4
 
+sampleBook:
+  incbin "sbook.bin"
+  cnop 0,4
+
+waveBook:
+  incbin "wbook.bin"
   cnop 0,4
 
 sequence:
   incbin "seq.bin"
-
   cnop 0,4
 
 sampleData:
   incbin "sample.bin"
-
   cnop 0,4
 
 wavetable:
   incbin "wave.bin"
-

src/engine/export/amigaValidation.cpp

@@ -32,11 +32,21 @@ struct WaveEntry {
   }
 };
 
+struct SampleBookEntry {
+  unsigned int loc;
+  unsigned short len;
+  SampleBookEntry():
+    loc(0),
+    len(0) {}
+};
+
 std::vector<DivROMExportOutput> DivExportAmigaValidation::go(DivEngine* e) {
   std::vector<DivROMExportOutput> ret;
   std::vector<WaveEntry> waves;
+  std::vector<SampleBookEntry> sampleBook;
   unsigned int wavesDataPtr=0;
   WaveEntry curWaveState[4];
+  unsigned int sampleBookLoc=0;
 
   DivPlatformAmiga* amiga=(DivPlatformAmiga*)e->getDispatch(0);
 
@@ -133,11 +143,19 @@ std::vector<DivROMExportOutput> DivExportAmigaValidation::go(DivEngine* e) {
             wavesDataPtr+=curWaveState[i].width;
           }
 
-          seq->writeC((i<<4)|1);
-          seq->writeC(waves[waveNum].pos>>16);
-          seq->writeC(waves[waveNum].pos>>8);
-          seq->writeC(waves[waveNum].pos);
-          seq->writeS_BE(waves[waveNum].width);
+          if (waveNum<256) {
+            seq->writeC((i<<4)|3);
+            seq->writeC(waveNum);
+          } else if (waveNum<65536) {
+            seq->writeC((i<<4)|4);
+            seq->writeS_BE(waveNum);
+          } else{
+            seq->writeC((i<<4)|1);
+            seq->writeC(waves[waveNum].pos>>16);
+            seq->writeC(waves[waveNum].pos>>8);
+            seq->writeC(waves[waveNum].pos);
+            seq->writeS_BE(waves[waveNum].width);
+          }
         }
       }
     }
@@ -160,12 +178,35 @@ std::vector<DivROMExportOutput> DivExportAmigaValidation::go(DivEngine* e) {
       }
       if (j.addr>=0x200) { // direct loc/len change
         if (j.addr&4) { // len
-          seq->writeS_BE(j.val);
+          int sampleBookIndex=-1;
+          for (size_t i=0; i<sampleBook.size(); i++) {
+            if (sampleBook[i].loc==sampleBookLoc && sampleBook[i].len==(j.val&0xffff)) {
+              sampleBookIndex=i;
+              break;
+            }
+          }
+          if (sampleBookIndex==-1) {
+            if (sampleBook.size()<256) {
+              SampleBookEntry e;
+              e.loc=sampleBookLoc;
+              e.len=j.val&0xffff;
+              sampleBookIndex=sampleBook.size();
+              sampleBook.push_back(e);
+            }
+          }
+
+          if (sampleBookIndex==-1) {
+            seq->writeC((j.addr&3)<<4);
+            seq->writeC(sampleBookLoc>>16);
+            seq->writeC(sampleBookLoc>>8);
+            seq->writeC(sampleBookLoc);
+            seq->writeS_BE(j.val);
+          } else {
+            seq->writeC(((j.addr&3)<<4)|2);
+            seq->writeC(sampleBookIndex);
+          }
         } else { // loc
-          seq->writeC((j.addr&3)<<4);
-          seq->writeC(j.val>>16);
-          seq->writeC(j.val>>8);
-          seq->writeC(j.val);
+          sampleBookLoc=j.val;
         }
       } else if (j.addr<0xa0) {
         // don't write INTENA
@@ -205,7 +246,28 @@ std::vector<DivROMExportOutput> DivExportAmigaValidation::go(DivEngine* e) {
     wave->write(i.data,i.width);
   }
   
+  // sbook.bin
+  SafeWriter* sbook=new SafeWriter;
+  sbook->init();
+  for (SampleBookEntry& i: sampleBook) {
+    // 8 bytes per entry
+    sbook->writeI_BE(i.loc);
+    sbook->writeI_BE(i.len);
+  }
+
+  // wbook.bin
+  SafeWriter* wbook=new SafeWriter;
+  wbook->init();
+  for (WaveEntry& i: waves) {
+    wbook->writeC(i.width);
+    wbook->writeC(i.pos>>16);
+    wbook->writeC(i.pos>>8);
+    wbook->writeC(i.pos);
+  }
+
   // finish
+  ret.push_back(DivROMExportOutput("sbook.bin",sbook));
+  ret.push_back(DivROMExportOutput("wbook.bin",wbook));
   ret.push_back(DivROMExportOutput("sample.bin",sample));
   ret.push_back(DivROMExportOutput("wave.bin",wave));
   ret.push_back(DivROMExportOutput("seq.bin",seq));

src/engine/safeWriter.cpp

@@ -144,6 +144,16 @@ int SafeWriter::writeI(int val) {
   return write(&val,4);
 }
 
+int SafeWriter::writeI_BE(int val) {
+  unsigned char bytes[4] {
+    (unsigned char)((val>>24)&0xff),
+    (unsigned char)((val>>16)&0xff),
+    (unsigned char)((val>>8)&0xff),
+    (unsigned char)(val&0xff)
+  };
+  return write(bytes,4);
+}
+
 int SafeWriter::writeL(int64_t val) {
   return write(&val,8);
 }