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Filesbraids
..
bootloader
data
drivers
hardware_design
resources
test
README.md
__init__.py
analog_oscillator.cc
analog_oscillator.h
braids.cc
digital_oscillator.cc
digital_oscillator.h
envelope.h
excitation.h
macro_oscillator.cc
macro_oscillator.h
makefile
parameter_interpolation.h
quantizer.cc
quantizer.h
quantizer_scales.h
resources.cc
resources.h
settings.cc
settings.h
signature_waveshaper.h
svf.h
ui.cc
ui.h
vco_jitter_source.h
svf.h
// Copyright 2013 Olivier Gillet. // // Author: Olivier Gillet (ol.gillet@gmail.com) // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // // See http://creativecommons.org/licenses/MIT/ for more information. // // ----------------------------------------------------------------------------- // // SVF used for modeling the bridged T-networks. #ifndef BRAIDS_SVF_H_ #define BRAIDS_SVF_H_ #include "stmlib/stmlib.h" #include "braids/resources.h" #include "stmlib/utils/dsp.h" namespace braids { enum SvfMode { SVF_MODE_LP, SVF_MODE_BP, SVF_MODE_HP }; class Svf { public: Svf() { } ~Svf() { } void Init() { lp_ = 0; bp_ = 0; frequency_ = 33 << 7; resonance_ = 16384; dirty_ = true; punch_ = 0; mode_ = SVF_MODE_BP; } void set_frequency(int16_t frequency) { dirty_ = dirty_ || (frequency_ != frequency); frequency_ = frequency; } void set_resonance(int16_t resonance) { resonance_ = resonance; dirty_ = true; } void set_punch(uint16_t punch) { punch_ = (static_cast<uint32_t>(punch) * punch) >> 24; } void set_mode(SvfMode mode) { mode_ = mode; } inline int32_t Process(int32_t in) { if (dirty_) { f_ = stmlib::Interpolate824(lut_svf_cutoff, frequency_ << 17); damp_ = stmlib::Interpolate824(lut_svf_damp, resonance_ << 17); dirty_ = false; } int32_t f = f_; int32_t damp = damp_; if (punch_) { int32_t punch_signal = lp_ > 4096 ? lp_ : 2048; f += ((punch_signal >> 4) * punch_) >> 9; damp += ((punch_signal - 2048) >> 3); } int32_t notch = in - (bp_ * damp >> 15); lp_ += f * bp_ >> 15; CLIP(lp_) int32_t hp = notch - lp_; bp_ += f * hp >> 15; CLIP(bp_) return mode_ == SVF_MODE_BP ? bp_ : (mode_ == SVF_MODE_HP ? hp : lp_); } private: bool dirty_; int16_t frequency_; int16_t resonance_; int32_t punch_; int32_t f_; int32_t damp_; int32_t lp_; int32_t bp_; SvfMode mode_; DISALLOW_COPY_AND_ASSIGN(Svf); }; } // namespace braids #endif // BRAIDS_SVF_H_
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