Branch
Hash :
adb9e235
Author :
Thomas de Grivel
Date :
2023-01-14T18:26:30
license
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/* rtbuf
* Copyright 2018-2023 kmx.io <contact@kmx.io>
*
* Permission is hereby granted to use this software excepted
* on Apple computers granted the above copyright notice and
* this permission paragraph are included in all copies and
* substantial portions of this software.
*
* THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
* PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
* AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
* THIS SOFTWARE.
*/
#include <stdio.h>
#include <strings.h>
#include "../../librtbuf/rtbuf.h"
#include "../../librtbuf/lib.h"
#include "../signal.h"
#include "../signal_type.h"
s_rtbuf_lib_proc_in rtbuf_signal_delay_in[] =
{{ "signal", RTBUF_SIGNAL_TYPE, 0.0, -1.0, 1.0, 1.0 },
{ "delay", RTBUF_SIGNAL_TYPE, 0.4, 0.0, RTBUF_SIGNAL_DELAY_MAX, 1.0 },
{ "feedback", RTBUF_SIGNAL_TYPE, 0.5, 0.0, 1.0, 1.0 },
{ 0, 0, 0.0, 0.0, 0.0, 0.0 }};
s_rtbuf_lib_proc_out rtbuf_signal_delay_out[] =
{{ "signal", RTBUF_SIGNAL_TYPE },
{ "in", RTBUF_SIGNAL_DELAY_TYPE },
{ "pos", "unsigned int" },
{ 0, 0 }};
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));
data->pos = 0;
return 0;
}
int rtbuf_signal_delay (s_rtbuf *rtb)
{
s_rtbuf_signal_fun in;
s_rtbuf_signal_fun delay;
s_rtbuf_signal_fun feedback;
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);
rtbuf_signal_fun(rtb, RTBUF_SIGNAL_DELAY_IN_DELAY, &feedback);
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);
double fb = min(max(0.0, feedback.sample_fun(feedback.signal, i)), 1.0);
unsigned int ds = d * RTBUF_SIGNAL_SAMPLERATE;
unsigned int p = (data->pos + RTBUF_SIGNAL_DELAY_SAMPLES_MAX - ds) %
RTBUF_SIGNAL_DELAY_SAMPLES_MAX;
data->signal[i] = data->in[p];
data->in[data->pos] = (1.0 - fb) * s + fb * data->in[p];
data->pos = (data->pos + 1) % RTBUF_SIGNAL_DELAY_SAMPLES_MAX;
i++;
}
return 0;
}
s_rtbuf_lib_proc rtbuf_lib_proc =
{ "delay",
rtbuf_signal_delay,
rtbuf_signal_delay_start,
0,
rtbuf_signal_delay_in,
rtbuf_signal_delay_out };
unsigned long rtbuf_lib_ver = RTBUF_LIB_VER;