static void pluck(t_bowedbar *x, float amplitude)
{
long i,j;
int pluckLen;
float temp;
pluckLen = (int)(x->length/x->modes[x->NR_MODES-1]);
for (j=1;j<pluckLen/2;j++) {
temp = amplitude*2.0*Noise_tick();
for(i=0; i<x->NR_MODES; i++)
DLineN_tick(&x->delay[i], temp*j/pluckLen*x->gains[i]);
}
for (j=pluckLen/2;j>0;j--) {
temp = amplitude*2.0*Noise_tick();
for(i=0; i<x->NR_MODES; i++)
DLineN_tick(&x->delay[i], temp*j/pluckLen*x->gains[i]);;
}
}
static t_int *bowedbar_perform(t_int *w)
{
t_bowedbar *x = (t_bowedbar *)(w[1]);
float bp = x->x_bp;
float bpos = x->x_bpos;
float bv = x->x_bv;
float GAIN = x->x_GAIN;
float integration_const_ = x->x_integration_const_;
float fr = x->x_freq;
t_float *out = (t_float *)(w[2]);
long n = w[3];
float temp, input, data;
long k;
if(fr != x->fr_save) {
setFreq(x, fr);
x->fr_save = fr;
}
x->bowTabl.slope = bp;
x->slope = bp;
setStrikePosition(x, bpos);
while(n--) {
data = 0.0;
input = 0.0;
if(integration_const_ == 0.0)
x->velinput = 0.0;
else
x->velinput = integration_const_ * x->velinput;
for(k=0; k<x->NR_MODES; k++) {
x->velinput += GAIN * x->delay[k].lastOutput;
}
input = bv - x->velinput;
input = input * BowTabl_lookup(&x->bowTabl, input);
input = input/(float)x->NR_MODES;
for(k=0; k<x->NR_MODES; k++) {
BiQuad_tick(&x->bandpass_[k], input*x->gains[k] + GAIN * x->delay[k].lastOutput);
DLineN_tick(&x->delay[k], x->bandpass_[k].lastOutput);
data += x->bandpass_[k].lastOutput;
}
*out++ = data * 4.0;
}
return w + 4;
}
int bowedbar(CSOUND *csound, BOWEDBAR *p)
{
MYFLT *ar = p->ar;
uint32_t offset = p->h.insdshead->ksmps_offset;
uint32_t early = p->h.insdshead->ksmps_no_end;
uint32_t n, nsmps = CS_KSMPS;
MYFLT amp = (*p->amp)*AMP_RSCALE; /* Normalise */
int32 k;
int i;
MYFLT maxVelocity;
MYFLT integration_const = *p->integration_const;
if (p->lastpress != *p->bowPress)
p->bowTabl.slope = p->lastpress = *p->bowPress;
if (p->freq != *p->frequency) {
p->freq = *p->frequency;
if (p->freq > FL(1568.0)) p->freq = FL(1568.0);
p->length = (int)(CS_ESR/p->freq);
p->nr_modes = NR_MODES; /* reset for frequency shift */
for (i = 0; i<NR_MODES; i++) {
if ((int)(p->length/p->modes[i]) > 4)
DLineN_setDelay(csound, &p->delay[i], (int)(p->length/p->modes[i]));
else {
p->nr_modes = i;
break;
}
}
if (p->nr_modes==0)
return csound->InitError(csound,
Str("Bowedbar: cannot have zero modes\n"));
for (i=0; i<p->nr_modes; i++) {
MYFLT R = FL(1.0) - p->freq * p->modes[i] * csound->pidsr;
BiQuad_clear(&p->bandpass[i]);
BiQuad_setFreqAndReson(p->bandpass[i], p->freq * p->modes[i], R);
BiQuad_setEqualGainZeroes(p->bandpass[i]);
BiQuad_setGain(p->bandpass[i], (FL(1.0)-R*R)*FL(0.5));
}
}
/* Bow position as well */
if (*p->position != p->lastpos) {
MYFLT temp2 = *p->position * PI_F;
p->gains[0] = FABS(SIN(temp2 * FL(0.5))) /* * pow(0.9,0))*/;
p->gains[1] = FABS(SIN(temp2) * FL(0.9));
p->gains[2] = FABS(SIN(temp2 * FL(1.5)) * FL(0.9)*FL(0.9));
p->gains[3] = FABS(SIN(temp2 * FL(2.0)) * FL(0.9)*FL(0.9)*FL(0.9));
p->lastpos = *p->position;
}
if (*p->bowposition != p->lastBowPos) { /* Not sure what this control is? */
p->bowTarg += FL(0.02) * (*p->bowposition - p->lastBowPos);
p->lastBowPos = *p->bowposition;
ADSR_setTarget(csound, &p->adsr, p->lastBowPos);
p->lastBowPos = *p->bowposition;
}
if (p->kloop>0 && p->h.insdshead->relesing) p->kloop=1;
if ((--p->kloop) == 0) {
ADSR_setReleaseRate(csound, &p->adsr, (FL(1.0) - amp) * FL(0.005));
p->adsr.target = FL(0.0);
p->adsr.rate = p->adsr.releaseRate;
p->adsr.state = RELEASE;
}
maxVelocity = FL(0.03) + (FL(0.5) * amp);
if (UNLIKELY(offset)) memset(ar, '\0', offset*sizeof(MYFLT));
if (UNLIKELY(early)) {
nsmps -= early;
memset(&ar[nsmps], '\0', early*sizeof(MYFLT));
}
for (n=offset; n<nsmps; n++) {
MYFLT data = FL(0.0);
MYFLT input = FL(0.0);
if (integration_const == FL(0.0))
p->velinput = FL(0.0);
else
p->velinput = integration_const * p->velinput;
for (k=0; k<p->nr_modes; k++) {
p->velinput += *p->GAIN * p->delay[k].lastOutput;
}
if (*p->trackVel) {
p->bowvel *= FL(0.9995);
p->bowvel += p->bowTarg;
p->bowTarg *= FL(0.995);
}
else
p->bowvel = ADSR_tick(&p->adsr)*maxVelocity;
input = p->bowvel - p->velinput;
input = input * BowTabl_lookup(csound, &p->bowTabl, input);
input = input/(MYFLT)p->nr_modes;
for (k=0; k<p->nr_modes; k++) {
BiQuad_tick(&p->bandpass[k],
input*p->gains[k] + *p->GAIN * p->delay[k].lastOutput);
DLineN_tick(&p->delay[k], p->bandpass[k].lastOutput);
data += p->bandpass[k].lastOutput;
}
ar[n] = data * AMP_SCALE * FL(20.0); /* 20 is an experimental value */
}
return OK;
}
