mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-03 09:01:54 -05:00
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include "crossover.h"
|
|
|
|
void lr4_set(struct lr4 *lr4, enum biquad_type type, float freq)
|
|
{
|
|
biquad_set(&lr4->bq, type, freq);
|
|
lr4->x1 = 0;
|
|
lr4->x2 = 0;
|
|
lr4->y1 = 0;
|
|
lr4->y2 = 0;
|
|
lr4->z1 = 0;
|
|
lr4->z2 = 0;
|
|
}
|
|
|
|
void lr4_process(struct lr4 *lr4, float *data, int samples)
|
|
{
|
|
float lx1 = lr4->x1;
|
|
float lx2 = lr4->x2;
|
|
float ly1 = lr4->y1;
|
|
float ly2 = lr4->y2;
|
|
float lz1 = lr4->z1;
|
|
float lz2 = lr4->z2;
|
|
float lb0 = lr4->bq.b0;
|
|
float lb1 = lr4->bq.b1;
|
|
float lb2 = lr4->bq.b2;
|
|
float la1 = lr4->bq.a1;
|
|
float la2 = lr4->bq.a2;
|
|
|
|
int i;
|
|
for (i = 0; i < samples; i++) {
|
|
float x, y, z;
|
|
x = data[i];
|
|
y = lb0*x + lb1*lx1 + lb2*lx2 - la1*ly1 - la2*ly2;
|
|
z = lb0*y + lb1*ly1 + lb2*ly2 - la1*lz1 - la2*lz2;
|
|
lx2 = lx1;
|
|
lx1 = x;
|
|
ly2 = ly1;
|
|
ly1 = y;
|
|
lz2 = lz1;
|
|
lz1 = z;
|
|
data[i] = z;
|
|
}
|
|
|
|
lr4->x1 = lx1;
|
|
lr4->x2 = lx2;
|
|
lr4->y1 = ly1;
|
|
lr4->y2 = ly2;
|
|
lr4->z1 = lz1;
|
|
lr4->z2 = lz2;
|
|
}
|