byte Struct10OnTimer(Struct10 s10, Struct11 s11)
{
byte result = 0;
int i;
if (s10.Count != 0 && (s10.Count -= 17) <= 0)
{
s10.Active = 0;
return 0;
}
i = s10.CurVal + s10.SpeedHi;
s10.SpeedLoCounter += s10.SpeedLo;
if (s10.SpeedLoCounter >= s10.SpeedLoMax)
{
s10.SpeedLoCounter -= s10.SpeedLoMax;
i += s10.Direction;
}
if (s10.CurVal != i || s10.ModWheel != s10.ModWheelLast)
{
s10.CurVal = (short)i;
s10.ModWheelLast = s10.ModWheel;
i = LookupVolume(i, s10.ModWheelLast);
if (i != s11.ModifyVal)
{
s11.ModifyVal = (short)i;
result = 1;
}
}
if (--s10.NumSteps == 0)
{
s10.Active++;
if (s10.Active > 4)
{
if (s10.Loop != 0)
{
s10.Active = 1;
result |= 2;
Struct10Setup(s10);
}
else
{
s10.Active = 0;
}
}
else
{
Struct10Setup(s10);
}
}
return result;
}
void McIncStuff(AdLibVoice voice, Struct10 s10, Struct11 s11)
{
byte code;
AdLibPart part = voice.Part;
code = Struct10OnTimer(s10, s11);
if ((code & 1) != 0)
{
switch (s11.Param)
{
case 0:
voice.Vol2 = (byte)(s10.StartValue + s11.ModifyVal);
if (!_scummSmallHeader)
{
AdlibSetParam(voice.Channel, 0,
volumeTable[volumeLookupTable[voice.Vol2, part._volEff >> 2]]);
}
else
{
AdlibSetParam(voice.Channel, 0, voice.Vol2);
}
break;
case 13:
voice.Vol1 = (byte)(s10.StartValue + s11.ModifyVal);
if (voice.TwoChan != 0 && !_scummSmallHeader)
{
AdlibSetParam(voice.Channel, 13,
volumeTable[volumeLookupTable[voice.Vol1, part._volEff >> 2]]);
}
else
{
AdlibSetParam(voice.Channel, 13, voice.Vol1);
}
break;
case 30:
s11.S10.ModWheel = (sbyte)s11.ModifyVal;
break;
case 31:
s11.S10.Unk3 = (sbyte)s11.ModifyVal;
break;
default:
AdlibSetParam(voice.Channel, s11.Param,
s10.StartValue + s11.ModifyVal);
break;
}
}
if ((code & 2) != 0 && s11.Flag0x10 != 0)
AdlibKeyOnOff(voice.Channel);
}
void Struct10Setup(Struct10 s10)
{
int b, c, d, e, f, g, h;
byte t;
b = s10.Unk3;
f = s10.Active - 1;
t = s10.TableA[f];
e = numStepsTable[volumeLookupTable[t & 0x7F, b]];
if ((t & 0x80) != 0)
{
e = RandomNr(e);
}
if (e == 0)
e++;
s10.NumSteps = s10.SpeedLoMax = (ushort)e;
if (f != 2)
{
c = s10.MaxValue;
g = s10.StartValue;
t = s10.TableB[f];
d = LookupVolume(c, (t & 0x7F) - 31);
if ((t & 0x80) != 0)
{
d = RandomNr(d);
}
if (d + g > c)
{
h = c - g;
}
else
{
h = d;
if (d + g < 0)
h = -g;
}
h -= s10.CurVal;
}
else
{
h = 0;
}
s10.SpeedHi = (short)(h / e);
if (h < 0)
{
h = -h;
s10.Direction = -1;
}
else
{
s10.Direction = 1;
}
s10.SpeedLo = (ushort)(h % e);
s10.SpeedLoCounter = 0;
}
void Struct10Init(Struct10 s10, InstrumentExtra ie)
{
s10.Active = 1;
if (!_scummSmallHeader)
{
s10.CurVal = 0;
}
else
{
s10.CurVal = s10.StartValue;
s10.StartValue = 0;
}
s10.ModWheelLast = 31;
s10.Count = ie.A;
if (s10.Count != 0)
s10.Count *= 63;
s10.TableA[0] = ie.B;
s10.TableA[1] = ie.D;
s10.TableA[2] = ie.F;
s10.TableA[3] = ie.G;
s10.TableB[0] = ie.C;
s10.TableB[1] = ie.E;
s10.TableB[2] = 0;
s10.TableB[3] = ie.H;
Struct10Setup(s10);
}
void McInitStuff(AdLibVoice voice, Struct10 s10, Struct11 s11, byte flags, InstrumentExtra ie)
{
var part = voice.Part;
s11.ModifyVal = 0;
s11.Flag0x40 = (byte)(flags & 0x40);
s10.Loop = (byte)(flags & 0x20);
s11.Flag0x10 = (byte)(flags & 0x10);
s11.Param = paramTable1[flags & 0xF];
s10.MaxValue = maxValTable[flags & 0xF];
s10.Unk3 = 31;
if (s11.Flag0x40 != 0)
{
s10.ModWheel = (sbyte)(part._modWheel >> 2);
}
else
{
s10.ModWheel = 31;
}
switch (s11.Param)
{
case 0:
s10.StartValue = voice.Vol2;
break;
case 13:
s10.StartValue = voice.Vol1;
break;
case 30:
s10.StartValue = 31;
s11.S10.ModWheel = 0;
break;
case 31:
s10.StartValue = 0;
s11.S10.Unk3 = 0;
break;
default:
s10.StartValue = (short)AdlibGetRegValueParam(voice.Channel, s11.Param);
break;
}
Struct10Init(s10, ie);
}
public AdLibVoice()
{
S10a = new Struct10();
S11a = new Struct11();
S10b = new Struct10();
S11b = new Struct11();
}
