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Make FFT size and oversampling adjustable for pitchshifting

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This commit is contained in:
Martin Dahlgren 2019-06-03 12:56:45 +02:00
parent 8b0ea33777
commit f78c7377c9
2 changed files with 61 additions and 3 deletions
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42
servers/audio/effects/audio_effect_pitch_shift.cpp
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@ -293,14 +293,16 @@ void AudioEffectPitchShiftInstance::process(const AudioFrame *p_src_frames, Audi
float *out_l = (float *)p_dst_frames;
float *out_r = out_l + 1;
shift_l.PitchShift(base->pitch_scale, p_frame_count, 2048, 4, sample_rate, in_l, out_l, 2);
shift_r.PitchShift(base->pitch_scale, p_frame_count, 2048, 4, sample_rate, in_r, out_r, 2);
shift_l.PitchShift(base->pitch_scale, p_frame_count, fft_size, base->oversampling, sample_rate, in_l, out_l, 2);
shift_r.PitchShift(base->pitch_scale, p_frame_count, fft_size, base->oversampling, sample_rate, in_r, out_r, 2);
}
Ref<AudioEffectInstance> AudioEffectPitchShift::instance() {
Ref<AudioEffectPitchShiftInstance> ins;
ins.instance();
ins->base = Ref<AudioEffectPitchShift>(this);
static const int fft_sizes[FFT_SIZE_MAX] = { 256, 512, 1024, 2048, 4096 };
ins->fft_size = fft_sizes[fft_size];
return ins;
}
@ -315,14 +317,50 @@ float AudioEffectPitchShift::get_pitch_scale() const {
return pitch_scale;
}
void AudioEffectPitchShift::set_oversampling(int p_oversampling) {
ERR_FAIL_COND(p_oversampling < 4);
oversampling = p_oversampling;
}
int AudioEffectPitchShift::get_oversampling() const {
return oversampling;
}
void AudioEffectPitchShift::set_fft_size(FFT_Size p_fft_size) {
ERR_FAIL_INDEX(p_fft_size, FFT_SIZE_MAX);
fft_size = p_fft_size;
}
AudioEffectPitchShift::FFT_Size AudioEffectPitchShift::get_fft_size() const {
return fft_size;
}
void AudioEffectPitchShift::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_pitch_scale", "rate"), &AudioEffectPitchShift::set_pitch_scale);
ClassDB::bind_method(D_METHOD("get_pitch_scale"), &AudioEffectPitchShift::get_pitch_scale);
ClassDB::bind_method(D_METHOD("set_oversampling", "amount"), &AudioEffectPitchShift::set_oversampling);
ClassDB::bind_method(D_METHOD("get_oversampling"), &AudioEffectPitchShift::get_oversampling);
ClassDB::bind_method(D_METHOD("set_fft_size", "size"), &AudioEffectPitchShift::set_fft_size);
ClassDB::bind_method(D_METHOD("get_fft_size"), &AudioEffectPitchShift::get_fft_size);
ADD_PROPERTY(PropertyInfo(Variant::REAL, "pitch_scale", PROPERTY_HINT_RANGE, "0.01,16,0.01"), "set_pitch_scale", "get_pitch_scale");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "oversampling", PROPERTY_HINT_RANGE, "4,32,1"), "set_oversampling", "get_oversampling");
ADD_PROPERTY(PropertyInfo(Variant::INT, "fft_size", PROPERTY_HINT_ENUM, "256,512,1024,2048,4096"), "set_fft_size", "get_fft_size");
BIND_ENUM_CONSTANT(FFT_SIZE_256);
BIND_ENUM_CONSTANT(FFT_SIZE_512);
BIND_ENUM_CONSTANT(FFT_SIZE_1024);
BIND_ENUM_CONSTANT(FFT_SIZE_2048);
BIND_ENUM_CONSTANT(FFT_SIZE_4096);
BIND_ENUM_CONSTANT(FFT_SIZE_MAX);
}
AudioEffectPitchShift::AudioEffectPitchShift() {
pitch_scale = 1.0;
oversampling = 4;
fft_size = FFT_SIZE_2048;
}