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Last update 6 years 2 months by Olivier Gillet
Fileswarpsdsp
..
filter_bank.cc
filter_bank.h
limiter.h
modulator.cc
modulator.h
oscillator.cc
oscillator.h
parameters.h
quadrature_oscillator.h
quadrature_transform.h
sample_rate_conversion_filters.h
sample_rate_converter.h
vocoder.cc
vocoder.h
oscillator.h
// Copyright 2014 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. // // ----------------------------------------------------------------------------- // // Oscillator. #ifndef WARPS_DSP_OSCILLATOR_H_ #define WARPS_DSP_OSCILLATOR_H_ #include "stmlib/stmlib.h" #include "stmlib/dsp/dsp.h" #include "stmlib/dsp/filter.h" #include "warps/dsp/parameters.h" #include "warps/resources.h" namespace warps { const float kInternalOscillatorSampleRate = 96000.0f; class Oscillator { public: Oscillator() { } ~Oscillator() { } void Init(float sample_rate); float Render( OscillatorShape shape, float note, float* modulation, float* out, size_t size); inline float midi_to_increment(float midi_pitch) const { int32_t pitch = static_cast<int32_t>(midi_pitch * 256.0f); pitch = 32768 + stmlib::Clip16(pitch - 20480); float increment = lut_midi_to_f_high[pitch >> 8] * \ lut_midi_to_f_low[pitch & 0xff]; return increment; } typedef float (Oscillator::*RenderFn)( float note, float* mod, float* out, size_t size); private: float Duck( const float* internal, const float* external, float* destination, size_t size); template<OscillatorShape shape> float RenderPolyblep(float, float*, float*, size_t); float RenderSine(float, float*, float*, size_t); float RenderNoise(float, float*, float*, size_t); static inline float ThisBlepSample(float t) { return 0.5f * t * t; } static inline float NextBlepSample(float t) { t = 1.0f - t; return -0.5f * t * t; } bool high_; float phase_; float phase_increment_; float next_sample_; float lp_state_; float hp_state_; float external_input_level_; float one_hertz_; static RenderFn fn_table_[]; stmlib::Svf filter_; DISALLOW_COPY_AND_ASSIGN(Oscillator); }; } // namespace warps #endif // WARPS_DSP_OSCILLATOR_H_
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