drvrNew.c
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/*====================================================================
* drvrNew.c
*
* Copyright 1993, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
* Inc.; the contents of this file may not be disclosed to third
* parties, copied or duplicated in any form, in whole or in part,
* without the prior written permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to
* restrictions as set forth in subdivision (c)(1)(ii) of the Rights
* in Technical Data and Computer Software clause at DFARS
* 252.227-7013, and/or in similar or successor clauses in the FAR,
* DOD or NASA FAR Supplement. Unpublished - rights reserved under the
* Copyright Laws of the United States.
*====================================================================*/
#include <libaudio.h>
#include "synthInternals.h"
#include <os.h>
#include "initfx.h"
/*
* WARNING: THE FOLLOWING CONSTANT MUST BE KEPT IN SYNC
* WITH SCALING IN MICROCODE!!!
*/
#define SCALE 16384
/*
* the following arrays contain default parameters for
* a few hopefully useful effects.
*/
#define ms *(((s32)((f32)44.1))&~0x7)
static s32 SMALLROOM_PARAMS[26] = {
/* sections length */
3, 100 ms,
/* chorus chorus filter
input output fbcoef ffcoef gain rate depth coef */
0, 54 ms, 9830, -9830, 0, 0, 0, 0,
19 ms, 38 ms, 3276, -3276, 0x3fff, 0, 0, 0,
0, 60 ms, 5000, 0, 0, 0, 0, 0x5000
};
static s32 BIGROOM_PARAMS[34] = {
/* sections length */
4, 100 ms,
/* chorus chorus filter
input output fbcoef ffcoef gain rate depth coef */
0, 66 ms, 9830, -9830, 0, 0, 0, 0,
22 ms, 54 ms, 3276, -3276, 0x3fff, 0, 0, 0,
66 ms, 91 ms, 3276, -3276, 0x3fff, 0, 0, 0,
0, 94 ms, 8000, 0, 0, 0, 0, 0x5000
};
static s32 ECHO_PARAMS[10] = {
/* sections length */
1, 200 ms,
/* chorus chorus filter
input output fbcoef ffcoef gain rate depth coef */
0, 179 ms, 12000, 0, 0x7fff, 0, 0, 0
};
static s32 CHORUS_PARAMS[10] = {
/* sections length */
1, 20 ms,
/* chorus chorus filter
input output fbcoef ffcoef gain rate depth coef */
0, 5 ms, 0x4000, 0, 0x7fff, 7600, 700, 0
};
static s32 FLANGE_PARAMS[10] = {
/* sections length */
1, 20 ms,
/* chorus chorus filter
input output fbcoef ffcoef gain rate depth coef */
0, 5 ms, 0, 0x5fff, 0x7fff, 380, 500, 0
};
static s32 NULL_PARAMS[10] = {
0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
void _init_lpfilter(ALLowPass *lp)
{
s32 i, temp;
s16 fc;
f64 ffc, fcoef;
temp = lp->fc * SCALE;
fc = temp >> 15;
lp->fgain = SCALE - fc;
lp->first = 1;
for (i=0; i<8; i++)
lp->fcvec.fccoef[i] = 0;
lp->fcvec.fccoef[i++] = fc;
fcoef = ffc = (f64)fc/SCALE;
for (; i<16; i++){
fcoef *= ffc;
lp->fcvec.fccoef[i] = (s16)(fcoef * SCALE);
}
}
void alFxNew(ALFx *r, ALSynConfig *c, ALHeap *hp)
{
u16 i, j, k;
s32 *param = 0;
ALFilter *f = (ALFilter *) r;
ALDelay *d;
alFilterNew(f, 0, alFxParam, AL_FX);
f->handler = alFxPull;
r->paramHdl = (ALSetFXParam)alFxParamHdl;
switch (c->fxType) {
case AL_FX_SMALLROOM: param = SMALLROOM_PARAMS; break;
case AL_FX_BIGROOM: param = BIGROOM_PARAMS; break;
case AL_FX_ECHO: param = ECHO_PARAMS; break;
case AL_FX_CHORUS: param = CHORUS_PARAMS; break;
case AL_FX_FLANGE: param = FLANGE_PARAMS; break;
case AL_FX_CUSTOM: param = c->params; break;
default: param = NULL_PARAMS; break;
}
j = 0;
r->section_count = param[j++];
r->length = param[j++];
r->delay = alHeapAlloc(hp, r->section_count, sizeof(ALDelay));
r->base = alHeapAlloc(hp, r->length, sizeof(s16));
r->input = r->base;
for ( k=0; k < r->length; k++)
r->base[k] = 0;
for ( i=0; i<r->section_count; i++ ){
d = &r->delay[i];
d->input = param[j++];
d->output = param[j++];
d->fbcoef = param[j++];
d->ffcoef = param[j++];
d->gain = param[j++];
if (param[j]) {
#define RANGE 2.0
/* d->rsinc = ((f32) param[j++])/0xffffff; */
d->rsinc = ((((f32)param[j++])/1000) * RANGE)/c->outputRate;
/*
* the following constant is derived from:
*
* ratio = 2^(cents/1200)
*
* and therefore for hundredths of a cent
* x
* ln(ratio) = ---------------
* (120,000)/ln(2)
* where
* 120,000/ln(2) = 173123.40...
*/
#define CONVERT 173123.404906676
#define LENGTH (d->output - d->input)
d->rsgain = (((f32) param[j++])/CONVERT) * LENGTH;
d->rsval = 1.0;
d->rsdelta = 0.0;
d->rs = alHeapAlloc(hp, 1, sizeof(ALResampler));
d->rs->state = alHeapAlloc(hp, 1, sizeof(RESAMPLE_STATE));
d->rs->delta = 0.0;
d->rs->first = 1;
} else {
d->rs = 0;
j++;
j++;
}
if (param[j]) {
d->lp = alHeapAlloc(hp, 1, sizeof(ALLowPass));
d->lp->fstate = alHeapAlloc(hp, 1, sizeof(POLEF_STATE));
d->lp->fc = param[j++];
_init_lpfilter(d->lp);
} else {
d->lp = 0;
j++;
}
}
}
void alEnvmixerNew(ALEnvMixer *e, ALHeap *hp)
{
alFilterNew((ALFilter *) e, alEnvmixerPull, alEnvmixerParam, AL_ENVMIX);
e->state = alHeapAlloc(hp, 1, sizeof(ENVMIX_STATE));
e->first = 1;
e->motion = AL_STOPPED;
e->volume = 1;
e->ltgt = 1;
e->rtgt = 1;
e->cvolL = 1;
e->cvolR = 1;
e->dryamt = 0;
e->wetamt = 0;
e->lratm = 1;
e->lratl = 0;
e->lratm = 1;
e->lratl = 0;
e->delta = 0;
e->segEnd = 0;
e->pan = 0;
e->ctrlList = 0;
e->ctrlTail = 0;
e->sources = 0;
}
void alLoadNew(ALLoadFilter *f, ALDMANew dmaNew, ALHeap *hp)
{
s32
i;
/*
* init filter superclass
*/
alFilterNew((ALFilter *) f, alAdpcmPull, alLoadParam, AL_ADPCM);
f->state = alHeapAlloc(hp, 1, sizeof(ADPCM_STATE));
f->lstate = alHeapAlloc(hp, 1, sizeof(ADPCM_STATE));
f->dma = dmaNew(&f->dmaState);
/*
* init the adpcm state
*/
f->lastsam = 0;
f->first = 1;
f->memin = 0;
}
void alResampleNew(ALResampler *r, ALHeap *hp)
{
alFilterNew((ALFilter *) r, alResamplePull, alResampleParam, AL_RESAMPLE);
/*
* Init resampler state
*/
r->state = alHeapAlloc(hp, 1, sizeof(RESAMPLE_STATE));
r->delta = 0.0;
r->first = 1;
r->motion = AL_STOPPED;
r->ratio = 1.0;
r->upitch = 0;
r->ctrlList = 0;
r->ctrlTail = 0;
/* state in the ucode is initialized by the A_INIT flag */
}
void alAuxBusNew(ALAuxBus *m, void *sources, s32 maxSources)
{
alFilterNew((ALFilter *) m, alAuxBusPull, alAuxBusParam, AL_AUXBUS);
m->sourceCount = 0;
m->maxSources = maxSources;
m->sources = (ALFilter **)sources;
}
void alMainBusNew(ALMainBus *m, void *sources, s32 maxSources)
{
alFilterNew((ALFilter *) m, alMainBusPull, alMainBusParam, AL_MAINBUS);
m->sourceCount = 0;
m->maxSources = maxSources;
m->sources = (ALFilter **)sources;
}
void alSaveNew(ALSave *f)
{
/*
* init filter superclass
*/
alFilterNew((ALFilter *) f, alSavePull, alSaveParam, AL_SAVE);
/*
* init the save state, which is a virtual dram address
*/
f->dramout = 0;
f->first = 1;
}