godot/servers/audio/effects/audio_effect_panner.cpp

#include "audio_effect_panner.h"


void AudioEffectPannerInstance::process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count) {


	float lvol = CLAMP( 1.0 - base->pan, 0, 1);
	float rvol = CLAMP( 1.0 + base->pan, 0, 1);

	for(int i=0;i<p_frame_count;i++) {

		p_dst_frames[i].l = p_src_frames[i].l * lvol + p_src_frames[i].r * (1.0 - rvol);
		p_dst_frames[i].r = p_src_frames[i].r * rvol + p_src_frames[i].l * (1.0 - lvol);

	}

}


Ref<AudioEffectInstance> AudioEffectPanner::instance() {
	Ref<AudioEffectPannerInstance> ins;
	ins.instance();
	ins->base=Ref<AudioEffectPanner>(this);
	return ins;
}

void AudioEffectPanner::set_pan(float p_cpanume) {
	pan=p_cpanume;
}

float AudioEffectPanner::get_pan() const {

	return pan;
}

void AudioEffectPanner::_bind_methods() {

	ClassDB::bind_method(D_METHOD("set_pan","cpanume"),&AudioEffectPanner::set_pan);
	ClassDB::bind_method(D_METHOD("get_pan"),&AudioEffectPanner::get_pan);

	ADD_PROPERTY(PropertyInfo(Variant::REAL,"pan",PROPERTY_HINT_RANGE,"-1,1,0.01"),"set_pan","get_pan");
}

AudioEffectPanner::AudioEffectPanner()
{
	pan=0;
}