SparrowOSTS_121127.ISO

SparrowOS/Apps/MusicOrgan/MakeSong.CPP

@@ -0,0 +1,155 @@
+class MakeSongSettings
+{
+  Bool simple_rhythms		fmtstr "$$CB,\"Simple Rhythms\"$$\n";
+  Bool rests			fmtstr "$$CB,\"Rests\"$$\n";
+  Bool change_waveforms	fmtstr "$$CB,\"Change Waveforms\"$$\n";
+  Bool six_eight		fmtstr "$$CB,\"Six Eight\"$$\n";
+  I64	 octave			fmtstr "$$DA-T,32,\"Octave:%d\"$$\n";
+};
+
+U0 InsNote(MakeSongSettings *mss,U8 *buf,I64 k,I64 *j)
+{  //k is a random note nibble
+  I64 a=TimerPickedNibble; //accent
+  if (!a) {
+    buf[*j]='!';
+    *j+=1;
+  }
+  if (a<4) {
+    buf[*j]='!';
+    *j+=1;
+  }
+  if (!k && mss->rests) {
+    buf[*j]='R';
+    *j+=1;
+  } else {
+    k/=2;
+    if (!k) {
+      if (music_octave) {
+	buf[*j]=music_octave-1+'0';
+	*j+=1;
+	buf[*j]='G';
+	*j+=1;
+	buf[*j]=music_octave+'0';
+	*j+=1;
+      } else {
+	buf[*j]='G';
+	*j+=1;
+      }
+    } else {
+      buf[*j]=k-1+'A';
+      *j+=1;
+    }
+  }
+}
+
+#define DUR_QUARTER	0
+#define DUR_EIGHTH	1
+#define DUR_TRIPLET	2
+#define DUR_SIXTEENTH	3
+
+U8 simple_songs [5]={DUR_EIGHTH,DUR_QUARTER,DUR_QUARTER,DUR_QUARTER,DUR_QUARTER};
+U8 complex_songs[6]={DUR_EIGHTH,DUR_TRIPLET,DUR_SIXTEENTH,DUR_QUARTER,DUR_QUARTER,DUR_QUARTER};
+
+U8 *MakeSong()
+{
+  MakeSongSettings mss;
+  U8 *buf;
+  I64 i,j=0,k,n,k2,duration,last_duration=-1,
+     wf[2],w=0,len;
+
+  mss.simple_rhythms=FALSE;
+  mss.rests=FALSE;
+  mss.change_waveforms=FALSE;
+  mss.octave=music_octave;
+
+  if (!PopUpForm(&mss,"MakeSongSettings"))
+    return NULL;
+
+  buf=CAlloc(256);
+  music_octave=LimitI64(mss.octave,0,6);
+  progress4=0;
+  if (mss.six_eight)
+    progress4_max=6;
+  else
+    progress4_max=8;
+
+  n=TimerPickedNi$WW,0$bble/2;
+  if (WF_NULL<n<WF_NOISE)
+    wf[0]=n;
+  else
+    wf[0]=WF_SQUARE;
+
+  n=TimerPickedNibble/2;
+  if (WF_NULL<n<WF_NOISE)
+    wf[1]=n;
+  else
+    wf[1]=wf[0];
+
+  buf[j++]='0'+music_octave;
+  if (mss.six_eight) {
+    len=6;
+    buf[j++]='M';
+    buf[j++]='6';
+    buf[j++]='/';
+    buf[j++]='8';
+  } else
+    len=8;
+  if (mss.change_waveforms) {
+    buf[j++]='W';
+    buf[j++]='0'+wf[w++&1];
+  }
+  for (i=0;i<len;i++) {
+    if (mss.change_waveforms) {
+      if (TimerPickedNibble<6) {
+	buf[j++]='W';
+	buf[j++]='0'+wf[w++&1];
+      }
+    }
+
+    n=TimerPickedNibble;
+    k=TimerPickedNibble;
+    if (mss.simple_rhythms)
+      duration=simple_songs[n%5];
+    else
+      duration=complex_songs[n%6];
+    switch (duration) {
+      case DUR_EIGHTH:
+	if (last_duration!=DUR_EIGHTH)
+	  buf[j++]='e';
+	InsNote(&mss,buf,k,&j);
+	k=TimerPickedNibble;
+	InsNote(&mss,buf,k,&j);
+	break;
+      case DUR_TRIPLET:
+	if (last_duration!=DUR_TRIPLET) {
+	  buf[j++]='e';
+	  buf[j++]='t';
+	}
+	InsNote(&mss,buf,k,&j);
+	k=TimerPickedNibble;
+	InsNote(&mss,buf,k,&j);
+	k=TimerPickedNibble;
+	InsNote(&mss,buf,k,&j);
+	break;
+      case DUR_SIXTEENTH:
+	if (last_duration!=DUR_SIXTEENTH)
+	  buf[j++]='s';
+	InsNote(&mss,buf,k,&j);
+	k2=k;
+	k=TimerPickedNibble;
+	InsNote(&mss,buf,k,&j);
+	InsNote(&mss,buf,k2,&j);
+	InsNote(&mss,buf,k,&j);
+	break;
+      default:
+	if (last_duration!=DUR_QUARTER)
+	  buf[j++]='q';
+	InsNote(&mss,buf,k,&j);
+    }
+    last_duration=duration;
+    progress4++;
+  }
+  buf[j++]=0;
+  progress4=progress4_max=0;
+  return buf;
+}