/*
* hexter_instance_update_fc
*/
public void hexter_instance_update_fc(int opnum,
int value)
{
int i;
dx7_voice voice;
int fc = value / 4; /* frequency coarse is 0 to 31 */
/* update edit buffer */
//if (!pthread_mutex_trylock(&this.patches_mutex)) {
this.current_patch_buffer[((5 - opnum) * 21) + 18] = (byte)fc;
// pthread_mutex_unlock(&this.patches_mutex);
//} else {
/* In the unlikely event that we get here, it means another thread is
* currently updating the current patch buffer. We could do something
* like the 'pending_program_change' mechanism to cache this change
* until we can lock the mutex, if it's really important. */
//}
/* check if any playing voices need updating */
for (i = 0; i < hexter_synth.Instance.global_polyphony; i++)
{
voice = hexter_synth.Instance.voice[i];
if (voice.instance == this && voice._PLAYING)
{
dx7_op op = voice.op[opnum];
op.coarse = (byte)fc;
op.dx7_op_recalculate_increment(this);
}
}
}
public int mod(int _i, Int32 _p)
{
dx7_op op = this.op[_i];
Int32 eg_value = op.eg.value - ampmod[op.amp_mod_sens];
Int32 phase = (Int32)op.phase + _p;
Int32 index, mod_index, outx;
index = (eg_value >> Constants.FP_SHIFT);
mod_index = Data.dx7_voice_eg_ol_to_mod_index_table[index + 128];
mod_index += (Int32)(((Int64)(Data.dx7_voice_eg_ol_to_mod_index_table[index + 129] - mod_index) * (Int64)(eg_value & Constants.FP_MASK)) >> Constants.FP_SHIFT);
index = (Int32)((phase >> Constants.FP_TO_SINE_SHIFT) & Constants.SINE_MASK);
outx = Data.dx7_voice_sin_table[index];
outx += (Int32)((((Int64)(Data.dx7_voice_sin_table[index + 1] - outx) *
(Int64)(phase & Constants.FP_TO_SINE_MASK)) >>
(Constants.FP_SHIFT_PLUS_FP_TO_SINE_SHIFT)));
return((Int32)(((Int64)mod_index * (Int64)outx) >> Constants.FP_SHIFT));
}
public int car_sfb(int _i, Int32 _p)
{
dx7_op op = this.op[_i];
Int32 eg_value = op.eg.value - ampmod[op.amp_mod_sens];
Int32 phase = (Int32)op.phase + _p;
Int32 index, amp, outx;
Int64 out64;
index = (eg_value >> Constants.FP_SHIFT);
amp = Data.dx7_voice_eg_ol_to_amp_table[index + 128];
amp += (Int32)(((Int64)(Data.dx7_voice_eg_ol_to_amp_table[index + 129] - amp) * (Int64)(eg_value & Constants.FP_MASK)) >> Constants.FP_SHIFT);
index = (Int32)((phase >> Constants.FP_TO_SINE_SHIFT) & Constants.SINE_MASK);
outx = Data.dx7_voice_sin_table[index];
out64 = outx +
(((Int64)(Data.dx7_voice_sin_table[index + 1] - outx) *
(Int64)(phase & Constants.FP_TO_SINE_MASK)) >>
(Constants.FP_SHIFT_PLUS_FP_TO_SINE_SHIFT));
this.feedback = (Int32)((((out64 * (Int64)eg_value) >> Constants.FP_SHIFT) *
(Int64)this.feedback_multiplier) >> Constants.FP_SHIFT);
return((Int32)(((Int64)amp * (Int64)out64) >> Constants.FP_SHIFT));
}
