mirror of
https://github.com/godotengine/godot.git
synced 2024-12-21 10:25:24 +08:00
327 lines
9.5 KiB
C++
327 lines
9.5 KiB
C++
#include "audio_effect_delay.h"
|
|
#include "servers/audio_server.h"
|
|
#include "math_funcs.h"
|
|
|
|
void AudioEffectDelayInstance::process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count) {
|
|
|
|
int todo = p_frame_count;
|
|
|
|
while(todo) {
|
|
|
|
int to_mix = MIN(todo,256); //can't mix too much
|
|
|
|
_process_chunk(p_src_frames,p_dst_frames,to_mix);
|
|
|
|
p_src_frames+=to_mix;
|
|
p_dst_frames+=to_mix;
|
|
|
|
todo-=to_mix;
|
|
}
|
|
}
|
|
|
|
void AudioEffectDelayInstance::_process_chunk(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count) {
|
|
|
|
|
|
|
|
float main_level_f=base->dry;
|
|
|
|
|
|
float mix_rate = AudioServer::get_singleton()->get_mix_rate();
|
|
|
|
float tap_1_level_f=base->tap_1_active?Math::db2linear(base->tap_1_level):0.0;
|
|
int tap_1_delay_frames=int((base->tap_1_delay_ms/1000.0)*mix_rate);;
|
|
|
|
float tap_2_level_f=base->tap_2_active?Math::db2linear(base->tap_2_level):0.0;
|
|
int tap_2_delay_frames=int((base->tap_2_delay_ms/1000.0)*mix_rate);;
|
|
|
|
float feedback_level_f=base->feedback_active?Math::db2linear(base->feedback_level):0.0;
|
|
unsigned int feedback_delay_frames=int((base->feedback_delay_ms/1000.0)*mix_rate);;
|
|
|
|
|
|
AudioFrame tap1_vol=AudioFrame(tap_1_level_f,tap_1_level_f);
|
|
|
|
tap1_vol.l*=CLAMP( 1.0 - base->tap_1_pan, 0, 1);
|
|
tap1_vol.r*=CLAMP( 1.0 + base->tap_1_pan, 0, 1);
|
|
|
|
AudioFrame tap2_vol=AudioFrame(tap_2_level_f,tap_2_level_f);
|
|
|
|
tap2_vol.l*=CLAMP( 1.0 - base->tap_2_pan, 0, 1);
|
|
tap2_vol.r*=CLAMP( 1.0 + base->tap_2_pan, 0, 1);
|
|
|
|
// feedback lowpass here
|
|
float lpf_c=expf(-2.0*Math_PI*base->feedback_lowpass/mix_rate); // 0 .. 10khz
|
|
float lpf_ic=1.0-lpf_c;
|
|
|
|
const AudioFrame *src=p_src_frames;
|
|
AudioFrame *dst=p_dst_frames;
|
|
AudioFrame *rb_buf=ring_buffer.ptr();
|
|
AudioFrame *fb_buf=feedback_buffer.ptr();
|
|
|
|
|
|
for (int i=0;i<p_frame_count;i++) {
|
|
|
|
|
|
rb_buf[ring_buffer_pos&ring_buffer_mask]=src[i];
|
|
|
|
AudioFrame main_val=src[i]*main_level_f;
|
|
AudioFrame tap_1_val=rb_buf[(ring_buffer_pos-tap_1_delay_frames)&ring_buffer_mask]*tap1_vol;
|
|
AudioFrame tap_2_val=rb_buf[(ring_buffer_pos-tap_2_delay_frames)&ring_buffer_mask]*tap2_vol;
|
|
|
|
AudioFrame out=main_val+tap_1_val+tap_2_val;
|
|
|
|
out+=fb_buf[ feedback_buffer_pos ];
|
|
|
|
//apply lowpass and feedback gain
|
|
AudioFrame fb_in=out*feedback_level_f*lpf_ic+h*lpf_c;
|
|
fb_in.undenormalise(); //avoid denormals
|
|
|
|
h=fb_in;
|
|
fb_buf[ feedback_buffer_pos ]=fb_in;
|
|
|
|
dst[i]=out;
|
|
|
|
ring_buffer_pos++;
|
|
|
|
if ( (++feedback_buffer_pos) >= feedback_delay_frames )
|
|
feedback_buffer_pos=0;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
Ref<AudioEffectInstance> AudioEffectDelay::instance() {
|
|
Ref<AudioEffectDelayInstance> ins;
|
|
ins.instance();
|
|
ins->base=Ref<AudioEffectDelay>(this);
|
|
|
|
float ring_buffer_max_size=MAX_DELAY_MS+100; //add 100ms of extra room, just in case
|
|
ring_buffer_max_size/=1000.0;//convert to seconds
|
|
ring_buffer_max_size*=AudioServer::get_singleton()->get_mix_rate();
|
|
|
|
int ringbuff_size=ring_buffer_max_size;
|
|
|
|
int bits=0;
|
|
|
|
while(ringbuff_size>0) {
|
|
bits++;
|
|
ringbuff_size/=2;
|
|
}
|
|
|
|
ringbuff_size=1<<bits;
|
|
ins->ring_buffer_mask=ringbuff_size-1;
|
|
ins->ring_buffer_pos=0;
|
|
|
|
ins->ring_buffer.resize( ringbuff_size );
|
|
ins->feedback_buffer.resize( ringbuff_size );
|
|
|
|
ins->feedback_buffer_pos=0;
|
|
|
|
ins->h=AudioFrame(0,0);
|
|
|
|
return ins;
|
|
}
|
|
|
|
|
|
void AudioEffectDelay::set_dry(float p_dry) {
|
|
|
|
dry=p_dry;
|
|
}
|
|
|
|
float AudioEffectDelay::get_dry(){
|
|
|
|
return dry;
|
|
}
|
|
|
|
void AudioEffectDelay::set_tap1_active(bool p_active){
|
|
|
|
tap_1_active=p_active;
|
|
}
|
|
bool AudioEffectDelay::is_tap1_active() const{
|
|
|
|
return tap_1_active;
|
|
}
|
|
|
|
void AudioEffectDelay::set_tap1_delay_ms(float p_delay_ms){
|
|
|
|
tap_1_delay_ms=p_delay_ms;
|
|
}
|
|
float AudioEffectDelay::get_tap1_delay_ms() const{
|
|
|
|
return tap_1_delay_ms;
|
|
}
|
|
|
|
void AudioEffectDelay::set_tap1_level_db(float p_level_db){
|
|
|
|
tap_1_level=p_level_db;
|
|
}
|
|
float AudioEffectDelay::get_tap1_level_db() const{
|
|
|
|
return tap_1_level;
|
|
}
|
|
|
|
void AudioEffectDelay::set_tap1_pan(float p_pan){
|
|
|
|
tap_1_pan=p_pan;
|
|
}
|
|
float AudioEffectDelay::get_tap1_pan() const{
|
|
|
|
return tap_1_pan;
|
|
}
|
|
|
|
|
|
void AudioEffectDelay::set_tap2_active(bool p_active){
|
|
|
|
tap_2_active=p_active;
|
|
}
|
|
bool AudioEffectDelay::is_tap2_active() const{
|
|
|
|
return tap_2_active;
|
|
}
|
|
|
|
void AudioEffectDelay::set_tap2_delay_ms(float p_delay_ms){
|
|
|
|
tap_2_delay_ms=p_delay_ms;
|
|
}
|
|
float AudioEffectDelay::get_tap2_delay_ms() const{
|
|
|
|
return tap_2_delay_ms;
|
|
}
|
|
|
|
void AudioEffectDelay::set_tap2_level_db(float p_level_db){
|
|
|
|
tap_2_level=p_level_db;
|
|
}
|
|
float AudioEffectDelay::get_tap2_level_db() const{
|
|
|
|
return tap_2_level;
|
|
}
|
|
|
|
void AudioEffectDelay::set_tap2_pan(float p_pan){
|
|
|
|
tap_2_pan=p_pan;
|
|
}
|
|
float AudioEffectDelay::get_tap2_pan() const{
|
|
|
|
return tap_2_pan;
|
|
}
|
|
|
|
void AudioEffectDelay::set_feedback_active(bool p_active){
|
|
|
|
feedback_active=p_active;
|
|
}
|
|
bool AudioEffectDelay::is_feedback_active() const{
|
|
|
|
return feedback_active;
|
|
}
|
|
|
|
void AudioEffectDelay::set_feedback_delay_ms(float p_delay_ms){
|
|
|
|
feedback_delay_ms=p_delay_ms;
|
|
}
|
|
float AudioEffectDelay::get_feedback_delay_ms() const{
|
|
|
|
return feedback_delay_ms;
|
|
}
|
|
|
|
void AudioEffectDelay::set_feedback_level_db(float p_level_db){
|
|
|
|
feedback_level=p_level_db;
|
|
}
|
|
float AudioEffectDelay::get_feedback_level_db() const{
|
|
|
|
return feedback_level;
|
|
}
|
|
|
|
void AudioEffectDelay::set_feedback_lowpass(float p_lowpass){
|
|
|
|
feedback_lowpass=p_lowpass;
|
|
}
|
|
float AudioEffectDelay::get_feedback_lowpass() const{
|
|
|
|
return feedback_lowpass;
|
|
}
|
|
|
|
|
|
void AudioEffectDelay::_bind_methods() {
|
|
|
|
ClassDB::bind_method(_MD("set_dry","amount"),&AudioEffectDelay::set_dry);
|
|
ClassDB::bind_method(_MD("get_dry"),&AudioEffectDelay::get_dry);
|
|
|
|
ClassDB::bind_method(_MD("set_tap1_active","amount"),&AudioEffectDelay::set_tap1_active);
|
|
ClassDB::bind_method(_MD("is_tap1_active"),&AudioEffectDelay::is_tap1_active);
|
|
|
|
ClassDB::bind_method(_MD("set_tap1_delay_ms","amount"),&AudioEffectDelay::set_tap1_delay_ms);
|
|
ClassDB::bind_method(_MD("get_tap1_delay_ms"),&AudioEffectDelay::get_tap1_delay_ms);
|
|
|
|
ClassDB::bind_method(_MD("set_tap1_level_db","amount"),&AudioEffectDelay::set_tap1_level_db);
|
|
ClassDB::bind_method(_MD("get_tap1_level_db"),&AudioEffectDelay::get_tap1_level_db);
|
|
|
|
ClassDB::bind_method(_MD("set_tap1_pan","amount"),&AudioEffectDelay::set_tap1_pan);
|
|
ClassDB::bind_method(_MD("get_tap1_pan"),&AudioEffectDelay::get_tap1_pan);
|
|
|
|
ClassDB::bind_method(_MD("set_tap2_active","amount"),&AudioEffectDelay::set_tap2_active);
|
|
ClassDB::bind_method(_MD("is_tap2_active"),&AudioEffectDelay::is_tap2_active);
|
|
|
|
ClassDB::bind_method(_MD("set_tap2_delay_ms","amount"),&AudioEffectDelay::set_tap2_delay_ms);
|
|
ClassDB::bind_method(_MD("get_tap2_delay_ms"),&AudioEffectDelay::get_tap2_delay_ms);
|
|
|
|
ClassDB::bind_method(_MD("set_tap2_level_db","amount"),&AudioEffectDelay::set_tap2_level_db);
|
|
ClassDB::bind_method(_MD("get_tap2_level_db"),&AudioEffectDelay::get_tap2_level_db);
|
|
|
|
ClassDB::bind_method(_MD("set_tap2_pan","amount"),&AudioEffectDelay::set_tap2_pan);
|
|
ClassDB::bind_method(_MD("get_tap2_pan"),&AudioEffectDelay::get_tap2_pan);
|
|
|
|
|
|
ClassDB::bind_method(_MD("set_feedback_active","amount"),&AudioEffectDelay::set_feedback_active);
|
|
ClassDB::bind_method(_MD("is_feedback_active"),&AudioEffectDelay::is_feedback_active);
|
|
|
|
ClassDB::bind_method(_MD("set_feedback_delay_ms","amount"),&AudioEffectDelay::set_feedback_delay_ms);
|
|
ClassDB::bind_method(_MD("get_feedback_delay_ms"),&AudioEffectDelay::get_feedback_delay_ms);
|
|
|
|
ClassDB::bind_method(_MD("set_feedback_level_db","amount"),&AudioEffectDelay::set_feedback_level_db);
|
|
ClassDB::bind_method(_MD("get_feedback_level_db"),&AudioEffectDelay::get_feedback_level_db);
|
|
|
|
ClassDB::bind_method(_MD("set_feedback_lowpass","amount"),&AudioEffectDelay::set_feedback_lowpass);
|
|
ClassDB::bind_method(_MD("get_feedback_lowpass"),&AudioEffectDelay::get_feedback_lowpass);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"dry",PROPERTY_HINT_RANGE,"0,1,0.01"),_SCS("set_dry"),_SCS("get_dry"));
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL,"tap1/active"),_SCS("set_tap1_active"),_SCS("is_tap1_active"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"tap1/delay_ms",PROPERTY_HINT_RANGE,"0,1500,1"),_SCS("set_tap1_delay_ms"),_SCS("get_tap1_delay_ms"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"tap1/level_db",PROPERTY_HINT_RANGE,"-60,0,0.01"),_SCS("set_tap1_level_db"),_SCS("get_tap1_level_db"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"tap1/pan",PROPERTY_HINT_RANGE,"-1,1,0.01"),_SCS("set_tap1_pan"),_SCS("get_tap1_pan"));
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL,"tap2/active"),_SCS("set_tap2_active"),_SCS("is_tap2_active"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"tap2/delay_ms",PROPERTY_HINT_RANGE,"0,1500,1"),_SCS("set_tap2_delay_ms"),_SCS("get_tap2_delay_ms"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"tap2/level_db",PROPERTY_HINT_RANGE,"-60,0,0.01"),_SCS("set_tap2_level_db"),_SCS("get_tap2_level_db"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"tap2/pan",PROPERTY_HINT_RANGE,"-1,1,0.01"),_SCS("set_tap2_pan"),_SCS("get_tap2_pan"));
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL,"feedback/active"),_SCS("set_feedback_active"),_SCS("is_feedback_active"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"feedback/delay_ms",PROPERTY_HINT_RANGE,"0,1500,1"),_SCS("set_feedback_delay_ms"),_SCS("get_feedback_delay_ms"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"feedback/level_db",PROPERTY_HINT_RANGE,"-60,0,0.01"),_SCS("set_feedback_level_db"),_SCS("get_feedback_level_db"));
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL,"feedback/lowpass",PROPERTY_HINT_RANGE,"1,16000,1"),_SCS("set_feedback_lowpass"),_SCS("get_feedback_lowpass"));
|
|
|
|
|
|
}
|
|
|
|
AudioEffectDelay::AudioEffectDelay()
|
|
{
|
|
tap_1_active=true;
|
|
tap_1_delay_ms=250;
|
|
tap_1_level=-6;
|
|
tap_1_pan=0.2;
|
|
|
|
tap_2_active=true;
|
|
tap_2_delay_ms=500;
|
|
tap_2_level=-12;
|
|
tap_2_pan=-0.4;
|
|
|
|
feedback_active=false;
|
|
feedback_delay_ms=340;
|
|
feedback_level=-6;
|
|
feedback_lowpass=16000;
|
|
|
|
dry=1.0;
|
|
|
|
}
|