123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
#include "audio_effect_eq.h"
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#include "servers/audio_server.h"
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void AudioEffectEQInstance::process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count) {
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int band_count = bands[0].size();
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EQ::BandProcess *proc_l = bands[0].ptr();
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EQ::BandProcess *proc_r = bands[1].ptr();
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float *bgain = gains.ptr();
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for(int i=0;i<band_count;i++) {
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bgain[i]=Math::db2linear(base->gain[i]);
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}
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for(int i=0;i<p_frame_count;i++) {
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AudioFrame src = p_src_frames[i];
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AudioFrame dst = AudioFrame(0,0);
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for(int j=0;j<band_count;j++) {
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float l = src.l;
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float r = src.r;
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proc_l[j].process_one(l);
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proc_r[j].process_one(r);
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dst.l+=l * bgain[j];
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dst.r+=r * bgain[j];
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}
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p_dst_frames[i]=dst;
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}
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}
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Ref<AudioEffectInstance> AudioEffectEQ::instance() {
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Ref<AudioEffectEQInstance> ins;
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ins.instance();
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ins->base=Ref<AudioEffectEQ>(this);
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ins->gains.resize(eq.get_band_count());
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for(int i=0;i<2;i++) {
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ins->bands[i].resize(eq.get_band_count());
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for(int j=0;j<ins->bands[i].size();j++) {
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ins->bands[i][j]=eq.get_band_processor(j);
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}
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}
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return ins;
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}
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void AudioEffectEQ::set_band_gain_db(int p_band,float p_volume) {
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ERR_FAIL_INDEX(p_band,gain.size());
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gain[p_band]=p_volume;
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}
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float AudioEffectEQ::get_band_gain_db(int p_band) const {
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ERR_FAIL_INDEX_V(p_band,gain.size(),0);
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return gain[p_band];
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}
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int AudioEffectEQ::get_band_count() const {
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return gain.size();
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}
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bool AudioEffectEQ::_set(const StringName& p_name, const Variant& p_value) {
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const Map<StringName,int>::Element *E=prop_band_map.find(p_name);
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if (E) {
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set_band_gain_db(E->get(),p_value);
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return true;
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}
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return false;
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}
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bool AudioEffectEQ::_get(const StringName& p_name,Variant &r_ret) const{
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const Map<StringName,int>::Element *E=prop_band_map.find(p_name);
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if (E) {
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r_ret=get_band_gain_db(E->get());
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return true;
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}
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return false;
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}
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void AudioEffectEQ::_get_property_list( List<PropertyInfo> *p_list) const{
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for(int i=0;i<band_names.size();i++) {
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p_list->push_back(PropertyInfo(Variant::REAL,band_names[i],PROPERTY_HINT_RANGE,"-60,24,0.1"));
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}
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}
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void AudioEffectEQ::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_band_gain_db","band_idx","volume_db"),&AudioEffectEQ::set_band_gain_db);
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ClassDB::bind_method(D_METHOD("get_band_gain_db","band_idx"),&AudioEffectEQ::get_band_gain_db);
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ClassDB::bind_method(D_METHOD("get_band_count"),&AudioEffectEQ::get_band_count);
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}
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AudioEffectEQ::AudioEffectEQ(EQ::Preset p_preset)
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{
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eq.set_mix_rate(AudioServer::get_singleton()->get_mix_rate());
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eq.set_preset_band_mode(p_preset);
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gain.resize(eq.get_band_count());
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for(int i=0;i<gain.size();i++) {
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gain[i]=0.0;
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String name = "band_db/"+itos(eq.get_band_frequency(i))+"_hz";
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prop_band_map[name]=i;
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band_names.push_back(name);
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}
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}
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