void StartEffect(EffectEnvelope env, byte[] data, int offset)
{
env.state = 1;
env.currentLevel = 0;
env.modWheelLast = 31;
env.duration = (short)(data[offset + 0] * 63);
env.stateTargetLevels[0] = data[offset + 1];
env.stateTargetLevels[1] = data[offset + 3];
env.stateTargetLevels[2] = data[offset + 5];
env.stateTargetLevels[3] = data[offset + 6];
env.stateModWheelLevels[0] = data[offset + 2];
env.stateModWheelLevels[1] = data[offset + 4];
env.stateModWheelLevels[2] = 0;
env.stateModWheelLevels[3] = data[offset + 7];
InitNextEnvelopeState(env);
}
void InitNextEnvelopeState(EffectEnvelope env)
{
byte lastState = (byte)(env.state - 1);
short stepCount = _effectEnvStepTable[GetEffectModifier((ushort)(((env.stateTargetLevels[lastState] & 0x7F) << 5) + env.modWheelSensitivity))];
if ((env.stateTargetLevels[lastState] & 0x80) != 0)
stepCount = GetRandScale(stepCount);
if (stepCount == 0)
stepCount = 1;
env.stateNumSteps = env.stateStepCounter = stepCount;
short totalChange = 0;
if (lastState != 2)
{
totalChange = GetEffectModLevel(env.maxLevel, (sbyte)((env.stateModWheelLevels[lastState] & 0x7F) - 31));
if ((env.stateModWheelLevels[lastState] & 0x80) != 0)
totalChange = GetRandScale(totalChange);
if (totalChange + env.startLevel > env.maxLevel)
totalChange = (short)(env.maxLevel - env.startLevel);
else if (totalChange + env.startLevel < 0)
totalChange = (short)-env.startLevel;
totalChange -= env.currentLevel;
}
env.changePerStep = (short)(totalChange / stepCount);
if (totalChange < 0)
{
totalChange = (short)-totalChange;
env.dir = -1;
}
else
{
env.dir = 1;
}
env.changePerStepRem = (short)(totalChange % stepCount);
env.changeCountRem = 0;
}
void SetupEffects(MidiChannelPcSpk chan, EffectEnvelope env, EffectDefinition def, byte flags, byte[] data, int offset)
{
def.phase = 0;
def.useModWheel = (byte)(flags & 0x40);
env.loop = (byte)(flags & 0x20);
def.type = (short)(flags & 0x1F);
env.modWheelSensitivity = 31;
if (def.useModWheel != 0)
env.modWheelState = (byte)(MidiChannelPcSpk.ModWheel >> 2);
else
env.modWheelState = 31;
switch (def.type)
{
case 0:
env.maxLevel = 767;
env.startLevel = 383;
break;
case 1:
env.maxLevel = 31;
env.startLevel = 15;
break;
case 2:
env.maxLevel = 63;
env.startLevel = chan._out.unkB;
break;
case 3:
env.maxLevel = 63;
env.startLevel = chan._out.unkC;
break;
case 4:
env.maxLevel = 3;
env.startLevel = chan._instrument[4];
break;
case 5:
env.maxLevel = 62;
env.startLevel = 31;
env.modWheelState = 0;
break;
case 6:
env.maxLevel = 31;
env.startLevel = 0;
env.modWheelSensitivity = 0;
break;
}
StartEffect(env, data, offset);
}