Hash :
928ec56d
Author :
Thomas de Grivel
Date :
2019-02-03T10:04:30
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/*
* Copyright 2018 Thomas de Grivel <thoxdg@gmail.com> +33614550127
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <strings.h>
#include "rtbuf.h"
#include "rtbuf_signal.h"
int rtbuf_signal_delay_start (s_rtbuf *rtb)
{
s_rtbuf_signal_delay_data *data;
assert(rtb->proc->out_bytes == sizeof(*data));
data = (s_rtbuf_signal_delay_data*) rtb->data;
bzero(data->in, sizeof(data->in));
return 0;
}
int rtbuf_signal_delay (s_rtbuf *rtb)
{
s_rtbuf_signal_fun in;
s_rtbuf_signal_fun delay;
s_rtbuf_signal_delay_data *data;
unsigned int i = 0;
rtbuf_signal_fun(rtb, RTBUF_SIGNAL_DELAY_IN_SIGNAL, &in);
rtbuf_signal_fun(rtb, RTBUF_SIGNAL_DELAY_IN_DELAY, &delay);
data = (s_rtbuf_signal_delay_data*) rtb->data;
while (i < RTBUF_SIGNAL_SAMPLES) {
double s = in.sample_fun(in.signal, i);
double d = min(max(0.0, delay.sample_fun(delay.signal, i)),
RTBUF_SIGNAL_DELAY_MAX);
unsigned int ds = d * RTBUF_SIGNAL_SAMPLERATE;
unsigned int p = data->pos + RTBUF_SIGNAL_DELAY_SAMPLES_MAX - ds;
data->out[i] = data->in[p % RTBUF_SIGNAL_DELAY_SAMPLES_MAX];
data->in[data->pos++] = s;
data->pos %= RTBUF_SIGNAL_DELAY_SAMPLES_MAX;
i++;
}
return 0;
}