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#include "effect_filter.h"
#include "dsp/db.h"
#include <math.h>
//process
bool AudioEffectFilter::has_secondary_input() const {
return false;
}
template <int S>
void AudioEffectFilter::_process_filter(const AudioFrame *p_src_frames, AudioFrame *p_dst_frames, int p_frame_count) {
for (int i = 0; i < p_frame_count; i++) {
float f = p_src_frames[i].l;
filter_process[0][0].process_one(f);
if (S > 1)
filter_process[0][1].process_one(f);
if (S > 2)
filter_process[0][2].process_one(f);
if (S > 3)
filter_process[0][3].process_one(f);
p_dst_frames[i].l = f;
}
for (int i = 0; i < p_frame_count; i++) {
float f = p_src_frames[i].r;
filter_process[1][0].process_one(f);
if (S > 1)
filter_process[1][1].process_one(f);
if (S > 2)
filter_process[1][2].process_one(f);
if (S > 3)
filter_process[1][3].process_one(f);
p_dst_frames[i].r = f;
}
}
void AudioEffectFilter::process(const Event *p_events, int p_event_count, const AudioFrame *p_in, AudioFrame *p_out, bool p_prev_active) {
filter.set_cutoff(control_ports[CONTROL_PORT_CUTOFF_HZ].value);
filter.set_gain(control_ports[CONTROL_PORT_GAIN].value);
filter.set_resonance(control_ports[CONTROL_PORT_RESONANCE].value);
filter.set_mode(filter_mode);
int stages = int(control_ports[CONTROL_PORT_DB].value) + 1;
filter.set_stages(stages);
filter.set_sampling_rate(sampling_rate);
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 4; j++) {
filter_process[i][j].update_coeffs();
}
}
if (stages == 1) {
_process_filter<1>(p_in, p_out, block_size);
} else if (stages == 2) {
_process_filter<2>(p_in, p_out, block_size);
} else if (stages == 3) {
_process_filter<3>(p_in, p_out, block_size);
} else if (stages == 4) {
_process_filter<4>(p_in, p_out, block_size);
}
}
void AudioEffectFilter::process_with_secondary(const Event *p_events, int p_event_count, const AudioFrame *p_in, const AudioFrame *p_secondary, AudioFrame *p_out, bool p_prev_active) {
}
void AudioEffectFilter::set_process_block_size(int p_size) {
block_size = p_size;
}
void AudioEffectFilter::set_sampling_rate(int p_hz) {
if (sampling_rate != p_hz) {
sampling_rate = p_hz;
_update_buffers();
}
}
//info
String AudioEffectFilter::get_name() const {
static const char *mode_names[] = { "BandPass", "HighPass", "LowPass", "Notch", "Peak", "BandLimit", "LowShelf", "HighShelf" };
return mode_names[filter_mode];
}
String AudioEffectFilter::get_unique_id() const {
static const char *mode_names[] = { "filter_band_pass", "filter_high_pass", "filter_low_pass", "filter_notch", "filter_peak", "filter_band_limit", "filter_low_shelf", "filter_high_shelf" };
return mode_names[filter_mode];
}
String AudioEffectFilter::get_provider_id() const {
return "internal";
}
int AudioEffectFilter::get_control_port_count() const {
return CONTROL_PORT_MAX;
}
ControlPort *AudioEffectFilter::get_control_port(int p_port) {
ERR_FAIL_INDEX_V(p_port, CONTROL_PORT_MAX, NULL);
return &control_ports[p_port];
}
void AudioEffectFilter::reset() {
_update_buffers();
}
/* Load/Save */
JSON::Node AudioEffectFilter::to_json() const {
JSON::Node node = JSON::object();
for (int i = 0; i < CONTROL_PORT_MAX; i++) {
node.add(control_ports[i].identifier.utf8().get_data(), control_ports[i].value);
}
return node;
}
Error AudioEffectFilter::from_json(const JSON::Node &node) {
for (int i = 0; i < CONTROL_PORT_MAX; i++) {
std::string key = control_ports[i].identifier.utf8().get_data();
if (node.has(key)) {
control_ports[i].value = node.get(key).toFloat();
}
}
return OK;
}
void AudioEffectFilter::_update_buffers() {
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 4; j++) {
filter_process[i][j].clear();
}
}
}
AudioEffectFilter::AudioEffectFilter(Filter::Mode p_filter_mode) {
filter_mode = p_filter_mode;
control_ports[CONTROL_PORT_CUTOFF_HZ].name = "Cutoff (hz)";
control_ports[CONTROL_PORT_CUTOFF_HZ].identifier = "cutoff";
control_ports[CONTROL_PORT_CUTOFF_HZ].min = 10;
control_ports[CONTROL_PORT_CUTOFF_HZ].max = 20000;
control_ports[CONTROL_PORT_CUTOFF_HZ].step = 1;
control_ports[CONTROL_PORT_CUTOFF_HZ].value = 2000;
control_ports[CONTROL_PORT_RESONANCE].name = "Resonance";
control_ports[CONTROL_PORT_RESONANCE].identifier = "resonance";
control_ports[CONTROL_PORT_RESONANCE].min = 0;
control_ports[CONTROL_PORT_RESONANCE].max = 1;
control_ports[CONTROL_PORT_RESONANCE].step = 0.01;
control_ports[CONTROL_PORT_RESONANCE].value = 0.5;
control_ports[CONTROL_PORT_GAIN].name = "Gain";
control_ports[CONTROL_PORT_GAIN].identifier = "gain";
control_ports[CONTROL_PORT_GAIN].min = 0;
control_ports[CONTROL_PORT_GAIN].max = 4;
control_ports[CONTROL_PORT_GAIN].step = 0.01;
control_ports[CONTROL_PORT_GAIN].value = 1.0;
if (filter_mode == Filter::LOWPASS || filter_mode == Filter::HIGHPASS || filter_mode == Filter::BANDPASS) {
control_ports[CONTROL_PORT_GAIN].visible = false;
}
control_ports[CONTROL_PORT_DB].name = "Strength";
control_ports[CONTROL_PORT_DB].identifier = "strength";
control_ports[CONTROL_PORT_DB].min = 0;
control_ports[CONTROL_PORT_DB].max = 3;
control_ports[CONTROL_PORT_DB].step = 1;
control_ports[CONTROL_PORT_DB].value = 0;
control_ports[CONTROL_PORT_DB].hint = ControlPort::HINT_ENUM;
control_ports[CONTROL_PORT_DB].enum_values.push_back("6 dB");
control_ports[CONTROL_PORT_DB].enum_values.push_back("12 dB");
control_ports[CONTROL_PORT_DB].enum_values.push_back("18 dB");
control_ports[CONTROL_PORT_DB].enum_values.push_back("24 dB");
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 4; j++) {
filter_process[i][j].set_filter(&filter);
}
}
block_size = 128;
sampling_rate = 0;
set_sampling_rate(44100);
set_process_block_size(128);
_update_buffers();
}
AudioEffectFilter::~AudioEffectFilter() {
}
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