shithub: soundpipe

ref: 79b51e588d41bc7df8c27f1f1aee57832a9d45ad
dir: /modules/scale.c/

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/* This code is placed in the public domain. */

#include <stdlib.h>
#include "soundpipe.h"

int sp_scale_create(sp_scale **p)
{
    *p = malloc(sizeof(sp_scale));
    return SP_OK;
}

int sp_scale_destroy(sp_scale **p)
{
    free(*p);
    return SP_OK;
}

int sp_scale_init(sp_data *sp, sp_scale *p)
{
    p->min = -1;
    p->max = 1;
    return SP_OK;
}

int sp_scale_compute(sp_data *sp, sp_scale *p, SPFLOAT *in, SPFLOAT *out)
{
    *out =  *in * (p->max - p->min) + p->min;
    return SP_OK;
}