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/*
* Diverse Bristol audio routines.
* Copyright (c) by Nick Copeland <nickycopeland@hotmail.com> 1996,2012
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
/*#define BRISTOL_DBG */
/*
* Need to have basic template for an operator. Will consist of
*
* eswitchinit()
* operate()
* reset()
* destroy()
*
* destroy() is in the library.
*
* Operate will be called when all the inputs have been loaded, and the result
* will be an output buffer written to the next operator.
*/
#include <stdlib.h>
#include "bristol.h"
#include "electroswitch.h"
/*
* The name of this operator, IO count, and IO names.
*/
#define OPNAME "Electromod"
#define OPDESCRIPTION "Electronic Switch"
#define PCOUNT 0
#define IOCOUNT 4
#define ESWITCHMOD_IN_1 0
#define ESWITCHMOD_IN_2 1
#define ESWITCHMOD_CLOCK 2
#define ESWITCHMOD_OUT 3
/*
* Reset any local memory information.
*/
static int destroy(bristolOP *operator)
{
#ifdef BRISTOL_DBG
printf("reset(%x)\n", operator);
#endif
/*
* Unmalloc anything we added to this structure
*/
bristolfree(operator->specs);
/*
* Free any local memory. We should also free ourselves, since we did the
* initial allocation.
*/
cleanup(operator);
return(0);
}
/*
* Reset any local memory information.
*/
static int reset(bristolOP *operator, bristolOPParams *param)
{
#ifdef BRISTOL_DBG
printf("eswitchreset(%x)\n", operator);
#endif
param->param[0].float_val = 1.0;
param->param[1].float_val = 1.0;
return(0);
}
/*
* Alter an internal parameter of an operator.
*/
static int param(bristolOP *operator, bristolOPParams *param,
unsigned char index, float value)
{
#ifdef BRISTOL_DBG
printf("eswitchparam(%x, %x, %i, %i)\n", operator, param, index, value);
#endif
param->param[index].float_val = value;
return(0);
}
/*
* Amplifier - takes input signal and mod signal, and mults them together.
*/
static int operate(register bristolOP *operator, bristolVoice *voice,
bristolOPParams *param,
void *lcl)
{
register int count;
register float *ib1, *ib2, *ob, *cbuf;
bristolESWITCHMOD *specs;
specs = (bristolESWITCHMOD *) operator->specs;
count = specs->spec.io[ESWITCHMOD_OUT].samplecount;
#ifdef BRISTOL_DBG
printf("eswitch(%x, %x, %i)\n", operator, param, count);
#endif
ib1 = specs->spec.io[ESWITCHMOD_IN_1].buf;
ib2 = specs->spec.io[ESWITCHMOD_IN_2].buf;
cbuf = specs->spec.io[ESWITCHMOD_CLOCK].buf;
ob = specs->spec.io[ESWITCHMOD_OUT].buf;
for (; count > 0;count-=8)
{
/*
* If the clock signal is greater than zero take the next sample from
* input buffer one, other wise input buffer two. When it changes we
* should interpret a sample, but that can be done later.
*/
/* *ob++ = *ib1++ * *ib2++; */
if (*cbuf++ >= 0)
{
*ob++ = *ib1++; ib2++;
*ob++ = *ib1++; ib2++;
*ob++ = *ib1++; ib2++;
*ob++ = *ib1++; ib2++;
*ob++ = *ib1++; ib2++;
*ob++ = *ib1++; ib2++;
*ob++ = *ib1++; ib2++;
*ob++ = *ib1++; ib2++;
} else {
*ob++ = *ib2++; ib1++;
*ob++ = *ib2++; ib1++;
*ob++ = *ib2++; ib1++;
*ob++ = *ib2++; ib1++;
*ob++ = *ib2++; ib1++;
*ob++ = *ib2++; ib1++;
*ob++ = *ib2++; ib1++;
*ob++ = *ib2++; ib1++;
}
}
return(0);
}
/*
* Setup any variables in our OP structure, in our IO structures, and malloc
* any memory we need.
*/
bristolOP *
eswitchinit(bristolOP **operator, int index, int samplerate, int samplecount)
{
bristolESWITCHMOD *specs;
#ifdef BRISTOL_DBG
printf("eswitchinit(%x(%x), %i, %i, %i)\n",
operator, *operator, index, samplerate, samplecount);
#endif
*operator = bristolOPinit(operator, index, samplecount);
/*
* Then the local parameters specific to this operator. These will be
* the same for each operator, but must be inited in the local code.
*/
(*operator)->operate = operate;
(*operator)->destroy = destroy;
(*operator)->reset = reset;
(*operator)->param = param;
specs = (bristolESWITCHMOD *) bristolmalloc0(sizeof(bristolESWITCHMOD));
(*operator)->specs = (bristolOPSpec *) specs;
(*operator)->size = sizeof(bristolESWITCHMOD);
/*
* These are specific to this operator, and will need to be altered for
* each operator.
*/
specs->spec.opname = OPNAME;
specs->spec.description = OPDESCRIPTION;
specs->spec.pcount = PCOUNT;
specs->spec.iocount = IOCOUNT;
specs->spec.localsize = sizeof(bristolESWITCHMODlocal);
/*
* Now fill in the dco IO specs.
*/
specs->spec.io[0].ioname = "Input 1";
specs->spec.io[0].description = "Electromod Input 1 Signal";
specs->spec.io[0].samplerate = samplerate;
specs->spec.io[0].samplecount = samplecount;
specs->spec.io[0].flags = BRISTOL_AC|BRISTOL_OUTPUT;
specs->spec.io[1].ioname = "Input 2";
specs->spec.io[1].description = "Electromod Input 2 Signal";
specs->spec.io[1].samplerate = samplerate;
specs->spec.io[1].samplecount = samplecount;
specs->spec.io[1].flags = BRISTOL_AC|BRISTOL_OUTPUT;
specs->spec.io[2].ioname = "Clock Input";
specs->spec.io[2].description = "Electromod clock Signal";
specs->spec.io[2].samplerate = samplerate;
specs->spec.io[2].samplecount = samplecount;
specs->spec.io[2].flags = BRISTOL_AC|BRISTOL_OUTPUT;
specs->spec.io[3].ioname = "output";
specs->spec.io[3].description = "Electromod Output Signal";
specs->spec.io[3].samplerate = samplerate;
specs->spec.io[3].samplecount = samplecount;
specs->spec.io[3].flags = BRISTOL_AC|BRISTOL_OUTPUT;
return(*operator);
}
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