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eb5b757947
* Remove fpp_t, switch f_cnt_t to std::uint64_t, change uses of fpp_t to use f_cnt_t instead * Switch release_frame in Lb302 to use f_cnt_t * Switch ch_cnt_t to uint16_t * Update src/core/NotePlayHandle.cpp Co-authored-by: Dalton Messmer <messmer.dalton@gmail.com> * Update src/core/NotePlayHandle.cpp Co-authored-by: Dalton Messmer <messmer.dalton@gmail.com> --------- Co-authored-by: Dalton Messmer <messmer.dalton@gmail.com>
116 lines
2.7 KiB
C++
Executable File
116 lines
2.7 KiB
C++
Executable File
/*
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* FrequencyShifter.h
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*
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* Copyright (c) 2025 Lost Robot <r94231/at/gmail/dot/com>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*/
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#ifndef LMMS_FREQUENCY_SHIFTER_EFFECT_H
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#define LMMS_FREQUENCY_SHIFTER_EFFECT_H
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#include "Effect.h"
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#include "FrequencyShifterControls.h"
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#include "HilbertTransform.h"
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#include "interpolation.h"
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#include "lmms_math.h"
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#include <array>
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#include <cmath>
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#include <numbers>
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#include <vector>
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namespace lmms
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{
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class FrequencyShifterEffect : public Effect
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{
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Q_OBJECT
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public:
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FrequencyShifterEffect(Model* parent, const Descriptor::SubPluginFeatures::Key* key);
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~FrequencyShifterEffect() override = default;
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ProcessStatus processImpl(SampleFrame* buf, const f_cnt_t frames) override;
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EffectControls* controls() override
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{
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return &m_controls;
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}
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private slots:
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void updateSampleRate();
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private:
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std::array<float, 2> getHermiteSample(int indexFloor, float fraction)
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{
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const int size = m_ringBufSize;
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const int i0 = (indexFloor == 0) ? (size - 1) : (indexFloor - 1);
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const int i1 = indexFloor;
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int i2 = indexFloor + 1;
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int i3 = indexFloor + 2;
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if (i2 >= size) i2 -= size;
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if (i3 >= size) i3 -= size;
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std::array<float, 2> out;
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for (int ch = 0; ch < 2; ++ch)
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{
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const float v0 = m_ringBuf[i0][ch];
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const float v1 = m_ringBuf[i1][ch];
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const float v2 = m_ringBuf[i2][ch];
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const float v3 = m_ringBuf[i3][ch];
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out[ch] = hermiteInterpolate(v0, v1, v2, v3, fraction);
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}
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return out;
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}
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HilbertIIRFloat<2> m_hilbert1;
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HilbertIIRFloat<2> m_hilbert2;
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std::vector<std::array<float, 2>> m_ringBuf;
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std::array<float, 2> m_phase{};
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std::array<float, 2> m_trueShift{};
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std::array<float, 2> m_dampState{};
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std::array<float, 2> m_toneState{};
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float m_lfoPhase{};
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float m_truePhase{};
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float m_trueDelay{1.f};
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float m_twoPiOverSr{};
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float m_sampleRate{};
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int m_ringBufSize{};
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int m_writeIndex{};
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bool m_prevResetShifter{};
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bool m_prevResetLfo{};
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FrequencyShifterControls m_controls;
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};
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} // namespace lmms
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#endif // LMMS_FREQUENCY_SHIFTER_EFFECT_H
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