ref: 77f33692fe909f74e5e1af52bebff99a596c86ab
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() */
static st_effect_t st_copy_effect;
/*
* Process options
*/
static int st_copy_getopts(eff_t effp UNUSED, int n, char **argv UNUSED)
{
if (n)
{
st_fail(st_copy_effect.usage);
return (ST_EOF);
}
return (ST_SUCCESS);
}
/*
* Start processing
*/
static int st_copy_start(eff_t effp UNUSED)
{
/* 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.
*/
static int st_copy_flow(eff_t effp UNUSED, const 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);
}
static st_effect_t st_copy_effect = {
"copy",
"Usage: Copy effect takes no options",
ST_EFF_MCHAN,
st_copy_getopts,
st_copy_start,
st_copy_flow,
st_effect_nothing_drain,
st_effect_nothing
};
const st_effect_t *st_copy_effect_fn(void)
{
return &st_copy_effect;
}