ref: 64b5fafba08091064c1df2fcf1ec176a018b1474
dir: /src/copy.c/
/*
* July 5, 1991
* Copyright 1991 Lance Norskog And Sundry Contributors
* This source code is freely redistributable and may be used for
* any purpose. This copyright notice must be maintained.
* Lance Norskog And Sundry Contributors are not responsible for
* the consequences of using this software.
*/
/*
* Sound Tools skeleton effect file.
*/
#include "st_i.h"
#include "string.h" /* memcpy() */
/*
* Process options
*/
int st_copy_getopts(eff_t effp, int n, char **argv)
{
if (n)
{
st_fail("Copy effect takes no options.");
return (ST_EOF);
}
return (ST_SUCCESS);
}
/*
* Start processing
*/
int st_copy_start(eff_t effp)
{
/* nothing to do */
/* stuff data into delaying effects here */
return (ST_SUCCESS);
}
/*
* Read up to len samples from file.
* Convert to signed longs.
* Place in buf[].
* Return number of samples read.
*/
int st_copy_flow(eff_t effp, st_sample_t *ibuf, st_sample_t *obuf,
st_size_t *isamp, st_size_t *osamp)
{
int done;
done = ((*isamp < *osamp) ? *isamp : *osamp);
memcpy(obuf, ibuf, done * sizeof(st_sample_t));
*isamp = *osamp = done;
return (ST_SUCCESS);
}
/*
* Do anything required when you stop reading samples.
* Don't close input file!
*/
int st_copy_stop(eff_t effp)
{
/* nothing to do */
return (ST_SUCCESS);
}