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-rw-r--r--servers/audio/effects/reverb.cpp279
1 files changed, 125 insertions, 154 deletions
diff --git a/servers/audio/effects/reverb.cpp b/servers/audio/effects/reverb.cpp
index bc3212201f..6462977d7c 100644
--- a/servers/audio/effects/reverb.cpp
+++ b/servers/audio/effects/reverb.cpp
@@ -30,11 +30,10 @@
// Author: Juan Linietsky <reduzio@gmail.com>, (C) 2006
#include "reverb.h"
-#include <math.h>
#include "math_funcs.h"
+#include <math.h>
-
-const float Reverb::comb_tunings[MAX_COMBS]={
+const float Reverb::comb_tunings[MAX_COMBS] = {
//freeverb comb tunings
0.025306122448979593,
0.026938775510204082,
@@ -46,7 +45,7 @@ const float Reverb::comb_tunings[MAX_COMBS]={
0.036666666666666667
};
-const float Reverb::allpass_tunings[MAX_ALLPASS]={
+const float Reverb::allpass_tunings[MAX_ALLPASS] = {
//freeverb allpass tunings
0.0051020408163265302,
0.007732426303854875,
@@ -54,76 +53,72 @@ const float Reverb::allpass_tunings[MAX_ALLPASS]={
0.012607709750566893
};
+void Reverb::process(float *p_src, float *p_dst, int p_frames) {
+ if (p_frames > INPUT_BUFFER_MAX_SIZE)
+ p_frames = INPUT_BUFFER_MAX_SIZE;
-void Reverb::process(float *p_src,float *p_dst,int p_frames) {
-
- 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)
- predelay_frames=10;
- if (predelay_frames>=echo_buffer_size)
- predelay_frames=echo_buffer_size-1;
+ int predelay_frames = lrint((params.predelay / 1000.0) * params.mix_rate);
+ if (predelay_frames < 10)
+ predelay_frames = 10;
+ if (predelay_frames >= echo_buffer_size)
+ predelay_frames = echo_buffer_size - 1;
- for (int i=0;i<p_frames;i++) {
+ for (int i = 0; i < p_frames; i++) {
- if (echo_buffer_pos>=echo_buffer_size)
- echo_buffer_pos=0;
+ if (echo_buffer_pos >= echo_buffer_size)
+ echo_buffer_pos = 0;
- int read_pos=echo_buffer_pos-predelay_frames;
- while (read_pos<0)
- read_pos+=echo_buffer_size;
+ int read_pos = echo_buffer_pos - predelay_frames;
+ while (read_pos < 0)
+ read_pos += echo_buffer_size;
- float in=undenormalise(echo_buffer[read_pos]*params.predelay_fb+p_src[i]);
+ float in = undenormalise(echo_buffer[read_pos] * params.predelay_fb + p_src[i]);
- echo_buffer[echo_buffer_pos]=in;
+ echo_buffer[echo_buffer_pos] = in;
- input_buffer[i]=in;
+ input_buffer[i] = in;
- p_dst[i]=0; //take the chance and clear this
+ p_dst[i] = 0; //take the chance and clear this
echo_buffer_pos++;
}
- if (params.hpf>0) {
- float hpaux=expf(-2.0*Math_PI*params.hpf*6000/params.mix_rate);
- float hp_a1=(1.0+hpaux)/2.0;
- float hp_a2=-(1.0+hpaux)/2.0;
- float hp_b1=hpaux;
+ if (params.hpf > 0) {
+ float hpaux = expf(-2.0 * Math_PI * params.hpf * 6000 / params.mix_rate);
+ float hp_a1 = (1.0 + hpaux) / 2.0;
+ float hp_a2 = -(1.0 + hpaux) / 2.0;
+ float hp_b1 = hpaux;
- for (int i=0;i<p_frames;i++) {
+ 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];
- hpf_h1=in;
+ float in = input_buffer[i];
+ input_buffer[i] = in * hp_a1 + hpf_h1 * hp_a2 + hpf_h2 * hp_b1;
+ hpf_h2 = input_buffer[i];
+ hpf_h1 = in;
}
}
- for (int i=0;i<MAX_COMBS;i++) {
+ for (int i = 0; i < MAX_COMBS; i++) {
- Comb &c=comb[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++) {
+ 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
- c.pos=0;
+ 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
- c.damp_h=out;
- c.buffer[c.pos]=input_buffer[j]+out;
- p_dst[j]+=out;
+ float out = undenormalise(c.buffer[c.pos] * c.feedback);
+ out = out * (1.0 - c.damp) + c.damp_h * c.damp; //lowpass
+ c.damp_h = out;
+ c.buffer[c.pos] = input_buffer[j] + out;
+ p_dst[j] += out;
c.pos++;
}
-
}
-
- static const float allpass_feedback=0.7;
+ static const float allpass_feedback = 0.7;
/* this one works, but the other version is just nicer....
int ap_size_limit[MAX_ALLPASS];
@@ -158,170 +153,154 @@ void Reverb::process(float *p_src,float *p_dst,int p_frames) {
}
*/
- for (int i=0;i<MAX_ALLPASS;i++) {
+ 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));
+ 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++) {
+ for (int j = 0; j < p_frames; j++) {
- if (a.pos>=size_limit)
- a.pos=0;
+ 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]);
- p_dst[j]=aux-allpass_feedback*a.buffer[a.pos];
+ float aux = a.buffer[a.pos];
+ a.buffer[a.pos] = undenormalise(allpass_feedback * aux + p_dst[j]);
+ p_dst[j] = aux - allpass_feedback * a.buffer[a.pos];
a.pos++;
-
}
}
- static const float wet_scale=0.6;
-
- for (int i=0;i<p_frames;i++) {
+ 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;
+ 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;
+ params.room_size = p_size;
update_parameters();
-
}
void Reverb::set_damp(float p_damp) {
- params.damp=p_damp;
+ params.damp = p_damp;
update_parameters();
-
}
void Reverb::set_wet(float p_wet) {
- params.wet=p_wet;
-
+ params.wet = p_wet;
}
void Reverb::set_dry(float p_dry) {
- params.dry=p_dry;
-
+ params.dry = p_dry;
}
void Reverb::set_predelay(float p_predelay) {
- params.predelay=p_predelay;
+ params.predelay = p_predelay;
}
void Reverb::set_predelay_feedback(float p_predelay_fb) {
- params.predelay_fb=p_predelay_fb;
-
+ params.predelay_fb = p_predelay_fb;
}
void Reverb::set_highpass(float p_frq) {
- if (p_frq>1)
- p_frq=1;
- if (p_frq<0)
- p_frq=0;
- params.hpf=p_frq;
+ if (p_frq > 1)
+ p_frq = 1;
+ if (p_frq < 0)
+ p_frq = 0;
+ params.hpf = p_frq;
}
void Reverb::set_extra_spread(float p_spread) {
- params.extra_spread=p_spread;
-
+ params.extra_spread = p_spread;
}
-
void Reverb::set_mix_rate(float p_mix_rate) {
- params.mix_rate=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;
+ params.extra_spread_base = p_sec;
configure_buffers();
}
-
void Reverb::configure_buffers() {
clear_buffers(); //clear if necesary
- for (int i=0;i<MAX_COMBS;i++) {
-
- Comb &c=comb[i];
-
+ for (int i = 0; i < MAX_COMBS; i++) {
- c.extra_spread_frames=lrint(params.extra_spread_base*params.mix_rate);
+ Comb &c = comb[i];
- int len=lrint(comb_tunings[i]*params.mix_rate)+c.extra_spread_frames;
- if (len<5)
- len=5; //may this happen?
+ c.extra_spread_frames = lrint(params.extra_spread_base * params.mix_rate);
- c.buffer = memnew_arr(float,len);
- c.pos=0;
- for (int j=0;j<len;j++)
- c.buffer[j]=0;
- c.size=len;
+ int len = lrint(comb_tunings[i] * params.mix_rate) + c.extra_spread_frames;
+ if (len < 5)
+ len = 5; //may this happen?
+ c.buffer = memnew_arr(float, len);
+ c.pos = 0;
+ for (int j = 0; j < len; j++)
+ c.buffer[j] = 0;
+ c.size = len;
}
- for (int i=0;i<MAX_ALLPASS;i++) {
+ for (int i = 0; i < MAX_ALLPASS; i++) {
- AllPass &a=allpass[i];
+ AllPass &a = allpass[i];
- a.extra_spread_frames=lrint(params.extra_spread_base*params.mix_rate);
+ 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)
- len=5; //may this happen?
+ int len = lrint(allpass_tunings[i] * params.mix_rate) + a.extra_spread_frames;
+ if (len < 5)
+ len = 5; //may this happen?
- a.buffer = memnew_arr(float,len);
- a.pos=0;
- for (int j=0;j<len;j++)
- a.buffer[j]=0;
- a.size=len;
+ a.buffer = memnew_arr(float, len);
+ a.pos = 0;
+ 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_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;
+ echo_buffer[i] = 0;
}
- echo_buffer_pos=0;
+ echo_buffer_pos = 0;
}
-
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++) {
+ 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)
- c.feedback=room_offset;
- else if (c.feedback>(room_offset+room_scale))
- c.feedback=(room_offset+room_scale);
+ Comb &c = comb[i];
+ c.feedback = room_offset + params.room_size * room_scale;
+ if (c.feedback < room_offset)
+ c.feedback = room_offset;
+ 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;
+ float auxdmp = params.damp / 2.0 + 0.5; //only half the range (0.5 .. 1.0 is enough)
+ auxdmp *= auxdmp;
- c.damp=expf(-2.0*Math_PI*auxdmp*10000/params.mix_rate); // 0 .. 10khz
+ c.damp = expf(-2.0 * Math_PI * auxdmp * 10000 / params.mix_rate); // 0 .. 10khz
}
-
}
void Reverb::clear_buffers() {
@@ -329,55 +308,47 @@ void Reverb::clear_buffers() {
if (echo_buffer)
memdelete_arr(echo_buffer);
- for (int i=0;i<MAX_COMBS;i++) {
+ for (int i = 0; i < MAX_COMBS; i++) {
if (comb[i].buffer)
memdelete_arr(comb[i].buffer);
- comb[i].buffer=0;
-
+ comb[i].buffer = 0;
}
- for (int i=0;i<MAX_ALLPASS;i++) {
+ for (int i = 0; i < MAX_ALLPASS; i++) {
if (allpass[i].buffer)
memdelete_arr(allpass[i].buffer);
- allpass[i].buffer=0;
+ allpass[i].buffer = 0;
}
-
}
Reverb::Reverb() {
- params.room_size=0.8;
- params.damp=0.5;
- params.dry=1.0;
- params.wet=0.0;
- params.mix_rate=44100;
- params.extra_spread_base=0;
- params.extra_spread=1.0;
- 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=0;
+ params.room_size = 0.8;
+ params.damp = 0.5;
+ params.dry = 1.0;
+ params.wet = 0.0;
+ params.mix_rate = 44100;
+ params.extra_spread_base = 0;
+ params.extra_spread = 1.0;
+ 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 = 0;
configure_buffers();
update_parameters();
-
-
}
-
Reverb::~Reverb() {
memdelete_arr(input_buffer);
clear_buffers();
}
-
-
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-16 16:11:04 +0000