136 lines
3.4 KiB
C++
136 lines
3.4 KiB
C++
#include "audio_effect_stereo_enhance.h"
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#include "servers/audio_server.h"
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void AudioEffectStereoEnhanceInstance::process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count) {
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float intensity=base->pan_pullout;
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bool surround_mode=base->surround>0;
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float surround_amount=base->surround;
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unsigned int delay_frames=(base->time_pullout/1000.0)*AudioServer::get_singleton()->get_mix_rate();
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for (int i=0;i<p_frame_count;i++) {
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float l=p_src_frames[i].l;
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float r=p_src_frames[i].r;
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float center=(l+r)/2.0f;
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l=( center+(l-center)*intensity );
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r=( center+(r-center)*intensity );
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if (surround_mode) {
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float val=(l+r)/2.0;
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delay_ringbuff[ringbuff_pos&ringbuff_mask]=val;
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float out=delay_ringbuff[(ringbuff_pos-delay_frames)&ringbuff_mask]*surround_amount;
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l+=out;
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r+=-out;
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} else {
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float val=r;
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delay_ringbuff[ringbuff_pos&ringbuff_mask]=val;
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//r is delayed
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r=delay_ringbuff[(ringbuff_pos-delay_frames)&ringbuff_mask];;
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}
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p_dst_frames[i].l=l;
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p_dst_frames[i].r=r;
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ringbuff_pos++;
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}
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}
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AudioEffectStereoEnhanceInstance::~AudioEffectStereoEnhanceInstance() {
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memdelete_arr(delay_ringbuff);
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}
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Ref<AudioEffectInstance> AudioEffectStereoEnhance::instance() {
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Ref<AudioEffectStereoEnhanceInstance> ins;
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ins.instance();
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ins->base=Ref<AudioEffectStereoEnhance>(this);
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float ring_buffer_max_size=AudioEffectStereoEnhanceInstance::MAX_DELAY_MS+2;
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ring_buffer_max_size/=1000.0;//convert to seconds
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ring_buffer_max_size*=AudioServer::get_singleton()->get_mix_rate();
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int ringbuff_size=(int)ring_buffer_max_size;
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int bits=0;
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while(ringbuff_size>0) {
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bits++;
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ringbuff_size/=2;
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}
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ringbuff_size=1<<bits;
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ins->ringbuff_mask=ringbuff_size-1;
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ins->ringbuff_pos=0;
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ins->delay_ringbuff = memnew_arr(float,ringbuff_size );
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return ins;
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}
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void AudioEffectStereoEnhance::set_pan_pullout(float p_amount) {
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pan_pullout=p_amount;
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}
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float AudioEffectStereoEnhance::get_pan_pullout() const {
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return pan_pullout;
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}
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void AudioEffectStereoEnhance::set_time_pullout(float p_amount) {
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time_pullout=p_amount;
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}
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float AudioEffectStereoEnhance::get_time_pullout() const {
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return time_pullout;
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}
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void AudioEffectStereoEnhance::set_surround(float p_amount) {
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surround=p_amount;
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}
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float AudioEffectStereoEnhance::get_surround() const {
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return surround;
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}
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void AudioEffectStereoEnhance::_bind_methods() {
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ClassDB::bind_method(_MD("set_pan_pullout","amount"),&AudioEffectStereoEnhance::set_pan_pullout);
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ClassDB::bind_method(_MD("get_pan_pullout"),&AudioEffectStereoEnhance::get_pan_pullout);
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ClassDB::bind_method(_MD("set_time_pullout","amount"),&AudioEffectStereoEnhance::set_time_pullout);
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ClassDB::bind_method(_MD("get_time_pullout"),&AudioEffectStereoEnhance::get_time_pullout);
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ClassDB::bind_method(_MD("set_surround","amount"),&AudioEffectStereoEnhance::set_surround);
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ClassDB::bind_method(_MD("get_surround"),&AudioEffectStereoEnhance::get_surround);
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ADD_PROPERTY(PropertyInfo(Variant::REAL,"pan_pullout",PROPERTY_HINT_RANGE,"0,4,0.01"),_SCS("set_pan_pullout"),_SCS("get_pan_pullout"));
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ADD_PROPERTY(PropertyInfo(Variant::REAL,"time_pullout_ms",PROPERTY_HINT_RANGE,"0,50,0.01"),_SCS("set_time_pullout"),_SCS("get_time_pullout"));
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ADD_PROPERTY(PropertyInfo(Variant::REAL,"surround",PROPERTY_HINT_RANGE,"0,1,0.01"),_SCS("set_surround"),_SCS("get_surround"));
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}
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AudioEffectStereoEnhance::AudioEffectStereoEnhance()
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{
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pan_pullout=1;
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time_pullout=0;
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surround=0;
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}
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