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Diffstat (limited to 'servers/audio/effects/reverb.cpp')
-rw-r--r--servers/audio/effects/reverb.cpp90
1 files changed, 40 insertions, 50 deletions
diff --git a/servers/audio/effects/reverb.cpp b/servers/audio/effects/reverb.cpp
index ea2174f1d4..7c35d88ced 100644
--- a/servers/audio/effects/reverb.cpp
+++ b/servers/audio/effects/reverb.cpp
@@ -31,7 +31,9 @@
// Author: Juan Linietsky <reduzio@gmail.com>, (C) 2006
#include "reverb.h"
+
#include "core/math/math_funcs.h"
+
#include <math.h>
const float Reverb::comb_tunings[MAX_COMBS] = {
@@ -55,24 +57,27 @@ const float Reverb::allpass_tunings[MAX_ALLPASS] = {
};
void Reverb::process(float *p_src, float *p_dst, int p_frames) {
-
- if (p_frames > INPUT_BUFFER_MAX_SIZE)
+ if (p_frames > INPUT_BUFFER_MAX_SIZE) {
p_frames = INPUT_BUFFER_MAX_SIZE;
+ }
int predelay_frames = lrint((params.predelay / 1000.0) * params.mix_rate);
- if (predelay_frames < 10)
+ if (predelay_frames < 10) {
predelay_frames = 10;
- if (predelay_frames >= echo_buffer_size)
+ }
+ if (predelay_frames >= echo_buffer_size) {
predelay_frames = echo_buffer_size - 1;
+ }
for (int i = 0; i < p_frames; i++) {
-
- if (echo_buffer_pos >= echo_buffer_size)
+ if (echo_buffer_pos >= echo_buffer_size) {
echo_buffer_pos = 0;
+ }
int read_pos = echo_buffer_pos - predelay_frames;
- while (read_pos < 0)
+ while (read_pos < 0) {
read_pos += echo_buffer_size;
+ }
float in = undenormalise(echo_buffer[read_pos] * params.predelay_fb + p_src[i]);
@@ -92,7 +97,6 @@ void Reverb::process(float *p_src, float *p_dst, int p_frames) {
float hp_b1 = hpaux;
for (int i = 0; i < p_frames; i++) {
-
float in = input_buffer[i];
input_buffer[i] = in * hp_a1 + hpf_h1 * hp_a2 + hpf_h2 * hp_b1;
hpf_h2 = input_buffer[i];
@@ -101,14 +105,13 @@ void Reverb::process(float *p_src, float *p_dst, int p_frames) {
}
for (int i = 0; i < MAX_COMBS; i++) {
-
Comb &c = comb[i];
int size_limit = c.size - lrintf((float)c.extra_spread_frames * (1.0 - params.extra_spread));
for (int j = 0; j < p_frames; j++) {
-
- if (c.pos >= size_limit) //reset this now just in case
+ if (c.pos >= size_limit) { //reset this now just in case
c.pos = 0;
+ }
float out = undenormalise(c.buffer[c.pos] * c.feedback);
out = out * (1.0 - c.damp) + c.damp_h * c.damp; //lowpass
@@ -155,14 +158,13 @@ void Reverb::process(float *p_src, float *p_dst, int p_frames) {
*/
for (int i = 0; i < MAX_ALLPASS; i++) {
-
AllPass &a = allpass[i];
int size_limit = a.size - lrintf((float)a.extra_spread_frames * (1.0 - params.extra_spread));
for (int j = 0; j < p_frames; j++) {
-
- if (a.pos >= size_limit)
+ if (a.pos >= size_limit) {
a.pos = 0;
+ }
float aux = a.buffer[a.pos];
a.buffer[a.pos] = undenormalise(allpass_feedback * aux + p_dst[j]);
@@ -174,108 +176,102 @@ void Reverb::process(float *p_src, float *p_dst, int p_frames) {
static const float wet_scale = 0.6;
for (int i = 0; i < p_frames; i++) {
-
p_dst[i] = p_dst[i] * params.wet * wet_scale + p_src[i] * params.dry;
}
}
void Reverb::set_room_size(float p_size) {
-
params.room_size = p_size;
update_parameters();
}
-void Reverb::set_damp(float p_damp) {
+void Reverb::set_damp(float p_damp) {
params.damp = p_damp;
update_parameters();
}
-void Reverb::set_wet(float p_wet) {
+void Reverb::set_wet(float p_wet) {
params.wet = p_wet;
}
void Reverb::set_dry(float p_dry) {
-
params.dry = p_dry;
}
void Reverb::set_predelay(float p_predelay) {
-
params.predelay = p_predelay;
}
-void Reverb::set_predelay_feedback(float p_predelay_fb) {
+void Reverb::set_predelay_feedback(float p_predelay_fb) {
params.predelay_fb = p_predelay_fb;
}
void Reverb::set_highpass(float p_frq) {
-
- if (p_frq > 1)
+ if (p_frq > 1) {
p_frq = 1;
- if (p_frq < 0)
+ }
+ if (p_frq < 0) {
p_frq = 0;
+ }
params.hpf = p_frq;
}
void Reverb::set_extra_spread(float p_spread) {
-
params.extra_spread = p_spread;
}
void Reverb::set_mix_rate(float p_mix_rate) {
-
params.mix_rate = p_mix_rate;
configure_buffers();
}
void Reverb::set_extra_spread_base(float p_sec) {
-
params.extra_spread_base = p_sec;
configure_buffers();
}
void Reverb::configure_buffers() {
-
clear_buffers(); //clear if necessary
for (int i = 0; i < MAX_COMBS; i++) {
-
Comb &c = comb[i];
c.extra_spread_frames = lrint(params.extra_spread_base * params.mix_rate);
int len = lrint(comb_tunings[i] * params.mix_rate) + c.extra_spread_frames;
- if (len < 5)
+ if (len < 5) {
len = 5; //may this happen?
+ }
c.buffer = memnew_arr(float, len);
c.pos = 0;
- for (int j = 0; j < len; j++)
+ for (int j = 0; j < len; j++) {
c.buffer[j] = 0;
+ }
c.size = len;
}
for (int i = 0; i < MAX_ALLPASS; i++) {
-
AllPass &a = allpass[i];
a.extra_spread_frames = lrint(params.extra_spread_base * params.mix_rate);
int len = lrint(allpass_tunings[i] * params.mix_rate) + a.extra_spread_frames;
- if (len < 5)
+ if (len < 5) {
len = 5; //may this happen?
+ }
a.buffer = memnew_arr(float, len);
a.pos = 0;
- for (int j = 0; j < len; j++)
+ for (int j = 0; j < len; j++) {
a.buffer[j] = 0;
+ }
a.size = len;
}
echo_buffer_size = (int)(((float)MAX_ECHO_MS / 1000.0) * params.mix_rate + 1.0);
echo_buffer = memnew_arr(float, echo_buffer_size);
for (int i = 0; i < echo_buffer_size; i++) {
-
echo_buffer[i] = 0;
}
@@ -283,19 +279,18 @@ void Reverb::configure_buffers() {
}
void Reverb::update_parameters() {
-
//more freeverb derived constants
static const float room_scale = 0.28f;
static const float room_offset = 0.7f;
for (int i = 0; i < MAX_COMBS; i++) {
-
Comb &c = comb[i];
c.feedback = room_offset + params.room_size * room_scale;
- if (c.feedback < room_offset)
+ if (c.feedback < room_offset) {
c.feedback = room_offset;
- else if (c.feedback > (room_offset + room_scale))
+ } else if (c.feedback > (room_offset + room_scale)) {
c.feedback = (room_offset + room_scale);
+ }
float auxdmp = params.damp / 2.0 + 0.5; //only half the range (0.5 .. 1.0 is enough)
auxdmp *= auxdmp;
@@ -305,29 +300,28 @@ void Reverb::update_parameters() {
}
void Reverb::clear_buffers() {
-
- if (echo_buffer)
+ if (echo_buffer) {
memdelete_arr(echo_buffer);
+ }
for (int i = 0; i < MAX_COMBS; i++) {
-
- if (comb[i].buffer)
+ if (comb[i].buffer) {
memdelete_arr(comb[i].buffer);
+ }
comb[i].buffer = nullptr;
}
for (int i = 0; i < MAX_ALLPASS; i++) {
-
- if (allpass[i].buffer)
+ if (allpass[i].buffer) {
memdelete_arr(allpass[i].buffer);
+ }
allpass[i].buffer = nullptr;
}
}
Reverb::Reverb() {
-
params.room_size = 0.8;
params.damp = 0.5;
params.dry = 1.0;
@@ -338,18 +332,14 @@ Reverb::Reverb() {
params.predelay = 150;
params.predelay_fb = 0.4;
params.hpf = 0;
- hpf_h1 = 0;
- hpf_h2 = 0;
input_buffer = memnew_arr(float, INPUT_BUFFER_MAX_SIZE);
- echo_buffer = nullptr;
configure_buffers();
update_parameters();
}
Reverb::~Reverb() {
-
memdelete_arr(input_buffer);
clear_buffers();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 07:32:39 +0000