diff options
Diffstat (limited to 'servers/audio/effects/audio_effect_phaser.cpp')
| -rw-r--r-- | servers/audio/effects/audio_effect_phaser.cpp | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/servers/audio/effects/audio_effect_phaser.cpp b/servers/audio/effects/audio_effect_phaser.cpp new file mode 100644 index 0000000000..bfce608603 --- /dev/null +++ b/servers/audio/effects/audio_effect_phaser.cpp @@ -0,0 +1,148 @@ +#include "audio_effect_phaser.h" +#include "servers/audio_server.h" +#include "math_funcs.h" + +void AudioEffectPhaserInstance::process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count) { + + float sampling_rate = AudioServer::get_singleton()->get_mix_rate(); + + float dmin = base->range_min / (sampling_rate/2.0); + float dmax = base->range_max / (sampling_rate/2.0); + + float increment = 2.f * Math_PI * (base->rate / sampling_rate); + + for(int i=0;i<p_frame_count;i++) { + + phase += increment; + + while ( phase >= Math_PI * 2.f ) { + phase -= Math_PI * 2.f; + } + + float d = dmin + (dmax-dmin) * ((sin( phase ) + 1.f)/2.f); + + + //update filter coeffs + for( int j=0; j<6; j++ ) { + allpass[0][j].delay( d ); + allpass[1][j].delay( d ); + } + + //calculate output + float y = allpass[0][0].update( + allpass[0][1].update( + allpass[0][2].update( + allpass[0][3].update( + allpass[0][4].update( + allpass[0][5].update( p_src_frames[i].l + h.l * base->feedback )))))); + h.l=y; + + p_dst_frames[i].l = p_src_frames[i].l + y * base->depth; + + y = allpass[1][0].update( + allpass[1][1].update( + allpass[1][2].update( + allpass[1][3].update( + allpass[1][4].update( + allpass[1][5].update( p_src_frames[i].r + h.r * base->feedback )))))); + h.r=y; + + p_dst_frames[i].r = p_src_frames[i].r + y * base->depth; + + + } + +} + + +Ref<AudioEffectInstance> AudioEffectPhaser::instance() { + Ref<AudioEffectPhaserInstance> ins; + ins.instance(); + ins->base=Ref<AudioEffectPhaser>(this); + ins->phase=0; + ins->h=AudioFrame(0,0); + + return ins; +} + + +void AudioEffectPhaser::set_range_min_hz(float p_hz) { + + range_min=p_hz; +} + +float AudioEffectPhaser::get_range_min_hz() const{ + + return range_min; +} + +void AudioEffectPhaser::set_range_max_hz(float p_hz){ + + range_max=p_hz; +} +float AudioEffectPhaser::get_range_max_hz() const{ + + return range_max; +} + +void AudioEffectPhaser::set_rate_hz(float p_hz){ + + rate=p_hz; +} +float AudioEffectPhaser::get_rate_hz() const{ + + return rate; +} + +void AudioEffectPhaser::set_feedback(float p_fbk){ + + feedback=p_fbk; +} +float AudioEffectPhaser::get_feedback() const{ + + return feedback; +} + +void AudioEffectPhaser::set_depth(float p_depth) { + + depth=p_depth; +} + +float AudioEffectPhaser::get_depth() const { + + return depth; +} + +void AudioEffectPhaser::_bind_methods() { + + ClassDB::bind_method(_MD("set_range_min_hz","hz"),&AudioEffectPhaser::set_range_min_hz); + ClassDB::bind_method(_MD("get_range_min_hz"),&AudioEffectPhaser::get_range_min_hz); + + ClassDB::bind_method(_MD("set_range_max_hz","hz"),&AudioEffectPhaser::set_range_max_hz); + ClassDB::bind_method(_MD("get_range_max_hz"),&AudioEffectPhaser::get_range_max_hz); + + ClassDB::bind_method(_MD("set_rate_hz","hz"),&AudioEffectPhaser::set_rate_hz); + ClassDB::bind_method(_MD("get_rate_hz"),&AudioEffectPhaser::get_rate_hz); + + ClassDB::bind_method(_MD("set_feedback","fbk"),&AudioEffectPhaser::set_feedback); + ClassDB::bind_method(_MD("get_feedback"),&AudioEffectPhaser::get_feedback); + + ClassDB::bind_method(_MD("set_depth","depth"),&AudioEffectPhaser::set_depth); + ClassDB::bind_method(_MD("get_depth"),&AudioEffectPhaser::get_depth); + + ADD_PROPERTY(PropertyInfo(Variant::REAL,"range_min_hz",PROPERTY_HINT_RANGE,"10,10000"),_SCS("set_range_min_hz"),_SCS("get_range_min_hz")); + ADD_PROPERTY(PropertyInfo(Variant::REAL,"range_max_hz",PROPERTY_HINT_RANGE,"10,10000"),_SCS("set_range_max_hz"),_SCS("get_range_max_hz")); + ADD_PROPERTY(PropertyInfo(Variant::REAL,"rate_hz",PROPERTY_HINT_RANGE,"0.01,20"),_SCS("set_rate_hz"),_SCS("get_rate_hz")); + ADD_PROPERTY(PropertyInfo(Variant::REAL,"feedback",PROPERTY_HINT_RANGE,"0.1,0.9,0.1"),_SCS("set_feedback"),_SCS("get_feedback")); + ADD_PROPERTY(PropertyInfo(Variant::REAL,"depth",PROPERTY_HINT_RANGE,"0.1,4,0.1"),_SCS("set_depth"),_SCS("get_depth")); + +} + +AudioEffectPhaser::AudioEffectPhaser() +{ + range_min=440; + range_max=1600; + rate=0.5; + feedback=0.7; + depth=1; +} |