public static void OPL3_ChannelWriteA0(ref opl3_channel channel, byte data)
{
if (channel.chip.newm != 0 && channel.chtype == ChannelType.ch_4op2)
{
return;
}
channel.f_num = (ushort)((channel.f_num & 0x300) | data);
channel.ksv = (byte)((channel.block << 1) | ((channel.f_num >> (0x09 - channel.chip.nts)) & 0x01));
OPL3_EnvelopeUpdateKSL(ref channel.slots[0]);
OPL3_EnvelopeUpdateKSL(ref channel.slots[1]);
if (channel.chip.newm != 0 && channel.chtype == ChannelType.ch_4op)
{
channel.pair.f_num = channel.f_num;
channel.pair.ksv = channel.ksv;
OPL3_EnvelopeUpdateKSL(ref channel.pair.slots[0]);
OPL3_EnvelopeUpdateKSL(ref channel.pair.slots[1]);
}
}
public static void OPL3_ChannelWriteC0(ref opl3_channel channel, byte data)
{
channel.fb = (byte)((data & 0x0e) >> 1);
channel.con = (byte)(data & 0x01);
channel.alg = channel.con;
if ((channel.chip.newm) != 0)
{
if (channel.chtype == ChannelType.ch_4op)
{
channel.pair.alg = (byte)(0x04 | (channel.con << 1) | (channel.pair.con));
channel.alg = 0x08;
OPL3_ChannelSetupAlg(ref channel.pair);
}
else if (channel.chtype == ChannelType.ch_4op2)
{
channel.alg = (byte)(0x04 | (channel.pair.con << 1) | (channel.con));
channel.pair.alg = 0x08;
OPL3_ChannelSetupAlg(ref channel);
}
else
{
OPL3_ChannelSetupAlg(ref channel);
}
}
else
{
OPL3_ChannelSetupAlg(ref channel);
}
if (channel.chip.newm != 0)
{
channel.cha = (ushort)(((data >> 4) & 0x01) != 0 ? ~0 : 0);
channel.chb = (ushort)(((data >> 5) & 0x01) != 0 ? ~0 : 0);
}
else
{
channel.cha = channel.chb = unchecked ((ushort)~0);
}
}
public static void OPL3_ChannelKeyOff(ref opl3_channel channel)
{
if (channel.chip.newm != 0)
{
if (channel.chtype == ChannelType.ch_4op)
{
OPL3_EnvelopeKeyOff(ref channel.slots[0], EnvelopeKeyType.norm);
OPL3_EnvelopeKeyOff(ref channel.slots[1], EnvelopeKeyType.norm);
OPL3_EnvelopeKeyOff(ref channel.pair.slots[0], EnvelopeKeyType.norm);
OPL3_EnvelopeKeyOff(ref channel.pair.slots[1], EnvelopeKeyType.norm);
}
else if (channel.chtype == ChannelType.ch_2op || channel.chtype == ChannelType.ch_drum)
{
OPL3_EnvelopeKeyOff(ref channel.slots[0], EnvelopeKeyType.norm);
OPL3_EnvelopeKeyOff(ref channel.slots[1], EnvelopeKeyType.norm);
}
}
else
{
OPL3_EnvelopeKeyOff(ref channel.slots[0], EnvelopeKeyType.norm);
OPL3_EnvelopeKeyOff(ref channel.slots[1], EnvelopeKeyType.norm);
}
}
public static void OPL3_ChannelSetupAlg(ref opl3_channel channel)
{
unsafe
{
if (channel.chtype == ChannelType.ch_drum)
{
if (channel.ch_num == 7 || channel.ch_num == 8)
{
fixed(short *p = &channel.chip.zeromod)
{
channel.slots[0].mod = p;
channel.slots[1].mod = p;
}
return;
}
switch (channel.alg & 0x01)
{
case 0x00:
fixed(short *f = &channel.slots[0].fbmod)
{
fixed(short *o = &channel.slots[0]._out)
{
channel.slots[0].mod = f;
channel.slots[1].mod = o;
}
}
break;
case 0x01:
fixed(short *f = &channel.slots[0].fbmod)
{
fixed(short *o = &channel.chip.zeromod)
{
channel.slots[0].mod = f;
channel.slots[1].mod = o;
}
}
break;
}
return;
}
if ((channel.alg & 0x08) != 0)
{
return;
}
if ((channel.alg & 0x04) != 0)
{
channel.pair._out[0] = channel.chip.zeromod;
channel.pair._out[1] = channel.chip.zeromod;
channel.pair._out[2] = channel.chip.zeromod;
channel.pair._out[3] = channel.chip.zeromod;
switch (channel.alg & 0x03)
{
case 0x00:
fixed(short *f = &channel.pair.slots[0].fbmod)
{
fixed(short *o = &channel.pair.slots[0]._out)
{
channel.pair.slots[0].mod = f;
channel.pair.slots[1].mod = o;
}
}
fixed(short *f = &channel.pair.slots[1]._out)
{
fixed(short *o = &channel.slots[0]._out)
{
channel.slots[0].mod = f;
channel.slots[1].mod = o;
}
}
channel._out[0] = channel.slots[1]._out;
channel._out[1] = channel.chip.zeromod;
channel._out[2] = channel.chip.zeromod;
channel._out[3] = channel.chip.zeromod;
break;
case 0x01:
// channel.pair.slots[0].mod = channel.pair.slots[0].fbmod;
// channel.pair.slots[1].mod = channel.pair.slots[0]._out;
// channel.slots[0].mod = channel.chip.zeromod;
// channel.slots[1].mod = channel.slots[0]._out;
// channel._out[0] = channel.pair.slots[1]._out;
// channel._out[1] = channel.slots[1]._out;
// channel._out[2] = channel.chip.zeromod;
// channel._out[3] = channel.chip.zeromod;
break;
case 0x02:
// channel.pair.slots[0].mod = channel.pair.slots[0].fbmod;
// channel.pair.slots[1].mod = channel.chip.zeromod;
// channel.slots[0].mod = channel.pair.slots[1]._out;
// channel.slots[1].mod = channel.slots[0]._out;
// channel._out[0] = channel.pair.slots[0]._out;
// channel._out[1] = channel.slots[1]._out;
// channel._out[2] = channel.chip.zeromod;
// channel._out[3] = channel.chip.zeromod;
// break;
case 0x03:
// channel.pair.slots[0].mod = channel.pair.slots[0].fbmod;
// channel.pair.slots[1].mod = channel.chip.zeromod;
// channel.slots[0].mod = channel.pair.slots[1]._out;
// channel.slots[1].mod = channel.chip.zeromod;
// channel._out[0] = channel.pair.slots[0]._out;
// channel._out[1] = channel.slots[0]._out;
// channel._out[2] = channel.slots[1]._out;
// channel._out[3] = channel.chip.zeromod;
break;
}
}
else
{
switch (channel.alg & 0x01)
{
case 0x00:
fixed(short *f = &channel.slots[0].fbmod)
{
fixed(short *o = &channel.slots[0]._out)
{
channel.slots[0].mod = f;
channel.slots[1].mod = o;
}
}
channel._out[0] = channel.slots[1]._out;
channel._out[1] = channel.chip.zeromod;
channel._out[2] = channel.chip.zeromod;
channel._out[3] = channel.chip.zeromod;
break;
case 0x01:
//channel.slots[0].mod = channel.slots[0].fbmod;
//channel.slots[1].mod = channel.chip.zeromod;
channel._out[0] = channel.slots[0]._out;
channel._out[1] = channel.slots[1]._out;
channel._out[2] = channel.chip.zeromod;
channel._out[3] = channel.chip.zeromod;
break;
}
}
}
}