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51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#include "audio_effect_amplify.h"
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void AudioEffectAmplifyInstance::process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count) {
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//multiply volume interpolating to avoid clicks if this changes
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float volume_db = base->volume_db;
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float vol = Math::db2linear(mix_volume_db);
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float vol_inc = (Math::db2linear(volume_db) - vol)/float(p_frame_count);
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for(int i=0;i<p_frame_count;i++) {
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p_dst_frames[i]=p_src_frames[i]*vol;
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vol+=vol_inc;
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}
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//set volume for next mix
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mix_volume_db = volume_db;
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}
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Ref<AudioEffectInstance> AudioEffectAmplify::instance() {
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Ref<AudioEffectAmplifyInstance> ins;
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ins.instance();
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ins->base=Ref<AudioEffectAmplify>(this);
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ins->mix_volume_db=volume_db;
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return ins;
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}
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void AudioEffectAmplify::set_volume_db(float p_volume) {
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volume_db=p_volume;
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}
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float AudioEffectAmplify::get_volume_db() const {
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return volume_db;
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}
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void AudioEffectAmplify::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_volume_db","volume"),&AudioEffectAmplify::set_volume_db);
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ClassDB::bind_method(D_METHOD("get_volume_db"),&AudioEffectAmplify::get_volume_db);
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ADD_PROPERTY(PropertyInfo(Variant::REAL,"volume_db",PROPERTY_HINT_RANGE,"-80,24,0.01"),"set_volume_db","get_volume_db");
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}
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AudioEffectAmplify::AudioEffectAmplify()
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{
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volume_db=0;
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}
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