Robin Davies
672 lines
22 KiB
C++
672 lines
22 KiB
C++
// Copyright (c) 2022 Robin Davies
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#pragma once
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#include "IEffect.hpp"
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#include "PiPedalException.hpp"
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#include "PiPedalMath.hpp"
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namespace pipedal
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{
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enum class SplitType
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{
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Ab = 0,
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Mix = 1,
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Lr = 2
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};
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class Lv2PluginInfo;
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class Lv2PortInfo;
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const Lv2PluginInfo *GetSplitterPluginInfo();
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const Lv2PortInfo *GetBypassPortInfo();
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const double SPLIT_DB_MIN = -60;
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inline SplitType valueToSplitType(float value)
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{
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switch ((int)value)
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{
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case 0:
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return SplitType::Ab;
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case 1:
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return SplitType::Mix;
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case 2:
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return SplitType::Lr;
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default:
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return SplitType::Ab;
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}
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};
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class SplitEffect : public IEffect
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{
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private:
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const double MIX_TRANSITION_TIME_S = 0.1;
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double sampleRate;
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std::vector<float *> inputs;
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std::vector<float *> topInputs;
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std::vector<float *> bottomInputs;
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std::vector<float *> topOutputs;
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std::vector<float *> bottomOutputs;
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std::vector<float *> mixTopInputs;
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std::vector<float *> mixBottomInputs;
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std::vector<float *> outputBuffers;
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int numberOfOutputPorts;
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SplitType splitType = SplitType::Ab;
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float mix = 0;
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float panL = 0;
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float volL = -3;
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float panR = 0;
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float volR = -3;
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float currentMix = 0;
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float targetBlendLTop = 0.5;
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float targetBlendRTop = 0.5;
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float targetBlendLBottom = 0.5;
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float targetBlendRBottom = 0.5;
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float blendLTop = 0.5;
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float blendRTop = 0.5;
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float blendLBottom = 0.5;
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float blendRBottom = 0.5;
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float blendDxLTop = 0;
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float blendDxRTop = 0;
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float blendDxLBottom = 0;
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float blendDxRBottom = 0;
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int32_t blendFadeSamples;
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bool selectA = true;
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bool activated = false;
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using MixFunction = void (SplitEffect::*)(uint32_t frames);
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MixFunction preAbTop;
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MixFunction preAbBottom;
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void Copy(float *input, float *output, uint32_t frames)
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{
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for (int i = 0; i < frames; ++i)
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{
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output[i] = input[i];
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}
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}
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void abTopMonoMono(uint32_t frames)
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{
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Copy(this->inputs[0], this->topInputs[0], frames);
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}
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void abTopMonoStereo(uint32_t frames)
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{
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Copy(this->inputs[0], this->topInputs[0], frames);
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Copy(this->inputs[0], this->topInputs[1], frames);
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}
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void abTopStereoStereo(uint32_t frames)
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{
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Copy(this->inputs[0], this->topInputs[0], frames);
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Copy(this->inputs[1], this->topInputs[1], frames);
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}
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void abBottomMonoMono(uint32_t frames)
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{
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Copy(this->inputs[0], this->bottomInputs[0], frames);
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}
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void abBottomMonoStereo(uint32_t frames)
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{
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Copy(this->inputs[0], this->bottomInputs[0], frames);
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Copy(this->inputs[0], this->bottomInputs[1], frames);
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}
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void abBottomStereoStereo(uint32_t frames)
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{
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Copy(this->inputs[0], this->bottomInputs[0], frames);
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Copy(this->inputs[1], this->bottomInputs[1], frames);
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}
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void lrTopMonoMono(uint32_t frames)
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{
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Copy(this->inputs[0], this->topInputs[0], frames);
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}
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void lrTopMonoStereo(uint32_t frames)
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{
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Copy(this->inputs[0], this->topInputs[0], frames);
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Copy(this->inputs[0], this->topInputs[1], frames);
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}
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void lrTopStereoStereo(uint32_t frames)
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{
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Copy(this->inputs[0], this->topInputs[0], frames);
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Copy(this->inputs[0], this->topInputs[1], frames);
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}
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void lrBottomMonoMono(uint32_t frames)
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{
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Copy(this->inputs[0], this->bottomInputs[0], frames);
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}
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void lrBottomMonoStereo(uint32_t frames)
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{
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Copy(this->inputs[0], this->bottomInputs[0], frames);
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Copy(this->inputs[0], this->bottomInputs[1], frames);
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}
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void lrBottomStereoStereo(uint32_t frames)
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{
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Copy(this->inputs[1], this->bottomInputs[0], frames);
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Copy(this->inputs[1], this->bottomInputs[1], frames);
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}
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void updateMixFunction()
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{
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if (activated)
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{
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// Input Mix Functions.
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if (splitType != SplitType::Lr)
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{
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if (this->inputs.size() == 1)
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{
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if (this->topInputs.size() == 1)
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this->preAbTop = &SplitEffect::abTopMonoMono;
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else
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{
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this->preAbTop = &SplitEffect::abTopMonoStereo;
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}
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if (this->bottomInputs.size() == 1)
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{
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this->preAbBottom = &SplitEffect::abBottomMonoMono;
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}
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else
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{
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this->preAbBottom = &SplitEffect::abBottomMonoStereo;
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}
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}
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else
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{
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if (this->topInputs.size() == 1)
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{
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this->preAbTop == &SplitEffect::abTopMonoMono;
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}
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else
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{
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this->preAbTop = &SplitEffect::abTopStereoStereo;
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}
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if (this->bottomInputs.size() == 1)
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{
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this->preAbBottom == &SplitEffect::abBottomMonoMono;
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}
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else
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{
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this->preAbBottom = &SplitEffect::abBottomStereoStereo;
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}
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}
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}
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else
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{
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if (this->inputs.size() == 1)
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{
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if (this->topInputs.size() == 1)
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this->preAbTop = &SplitEffect::lrTopMonoMono;
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else
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{
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this->preAbTop = &SplitEffect::lrTopMonoStereo;
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}
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if (this->bottomInputs.size() == 1)
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{
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this->preAbBottom = &SplitEffect::lrBottomMonoMono;
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}
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else
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{
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this->preAbBottom = &SplitEffect::lrBottomMonoStereo;
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}
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}
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else
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{
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if (this->topInputs.size() == 1)
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{
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this->preAbTop == &SplitEffect::lrTopMonoMono;
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}
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else
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{
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this->preAbTop = &SplitEffect::lrTopStereoStereo;
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}
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if (this->bottomInputs.size() == 1)
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{
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this->preAbBottom == &SplitEffect::lrBottomMonoMono;
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}
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else
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{
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this->preAbBottom = &SplitEffect::lrBottomStereoStereo;
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}
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}
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}
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if (splitType == SplitType::Ab)
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{
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mixTo(selectA ? -1 : 1);
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}
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else if (splitType == SplitType::Mix)
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{
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mixTo(mix);
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}
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else
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{
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mixTo(panL, volL, panR, volR);
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}
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}
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}
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uint64_t instanceId;
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virtual uint8_t *GetAtomInputBuffer() { return nullptr; }
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virtual uint8_t *GetAtomOutputBuffer() { return nullptr; }
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virtual void RequestParameter(LV2_URID uridUri) {}
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virtual void GatherParameter(RealtimeParameterRequest *pRequest) {}
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virtual std::string AtomToJson(uint8_t *pAtom) { return ""; }
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virtual std::string GetAtomObjectType(uint8_t*pData) { return "not implemented";}
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public:
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SplitEffect(
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uint64_t instanceId,
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double sampleRate,
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const std::vector<float *> &inputs)
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: instanceId(instanceId), inputs(inputs), sampleRate(sampleRate)
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{
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}
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~SplitEffect()
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{
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}
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virtual long GetInstanceId() const
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{
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return instanceId;
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}
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void Activate()
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{
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activated = true;
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updateMixFunction();
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snapToMixTarget();
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mixBottomInputs.clear();
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mixTopInputs.clear();
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if (outputBuffers.size() == 1)
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{
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mixTopInputs.push_back(this->topOutputs[0]);
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mixBottomInputs.push_back(this->bottomOutputs[0]);
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}
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else
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{
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if (this->topOutputs.size() == 1)
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{
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mixTopInputs.push_back(topOutputs[0]);
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mixTopInputs.push_back(topOutputs[0]);
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}
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else
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{
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mixTopInputs.push_back(topOutputs[0]);
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mixTopInputs.push_back(topOutputs[1]);
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}
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if (this->bottomOutputs.size() == 1)
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{
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mixBottomInputs.push_back(bottomOutputs[0]);
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mixBottomInputs.push_back(bottomOutputs[0]);
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}
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else
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{
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mixBottomInputs.push_back(bottomOutputs[0]);
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mixBottomInputs.push_back(bottomOutputs[1]);
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}
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}
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}
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void Deactivate()
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{
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activated = false;
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}
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void SetChainBuffers(
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const std::vector<float *> &topInputs,
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const std::vector<float *> &bottomInputs,
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const std::vector<float *> &topOutputs,
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const std::vector<float *> &bottomOutputs)
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{
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this->topInputs = topInputs;
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this->bottomInputs = bottomInputs;
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this->topOutputs = topOutputs;
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this->bottomOutputs = bottomOutputs;
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numberOfOutputPorts = topOutputs.size() > 1 || bottomOutputs.size() > 1 ? 2 : 1;
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outputBuffers.resize(numberOfOutputPorts);
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}
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virtual void ResetAtomBuffers() {}
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virtual int GetControlIndex(const std::string &symbol) const
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{
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if (symbol == "splitType")
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return 0;
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if (symbol == "select")
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return 1;
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if (symbol == "mix")
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return 2;
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return -1;
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}
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void snapToMixTarget()
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{
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this->blendLTop = targetBlendLTop;
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this->blendRTop = targetBlendRTop;
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this->blendRBottom = targetBlendRBottom;
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this->blendLBottom = targetBlendLBottom;
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this->blendFadeSamples = 0;
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this->blendDxLTop = 0;
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this->blendDxRTop = 0;
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this->blendDxLBottom = 0;
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this->blendDxRBottom = 0;
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}
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void mixToTarget()
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{
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uint32_t transitionSamples = (uint32_t)(this->sampleRate * MIX_TRANSITION_TIME_S);
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if (transitionSamples < 1)
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transitionSamples = 1;
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double dxScale = 1.0 / transitionSamples;
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this->blendFadeSamples = transitionSamples;
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this->blendDxLTop = dxScale * (this->targetBlendLTop - this->blendLTop);
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this->blendDxRTop = dxScale * (this->targetBlendRTop - this->blendRTop);
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this->blendDxLBottom = dxScale * (this->targetBlendLBottom - this->blendLBottom);
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this->blendDxRBottom = dxScale * (this->targetBlendRBottom - this->blendRBottom);
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}
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void mixTo(float value)
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{
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float blend = (value + 1) * 0.5f;
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this->targetBlendRTop = this->targetBlendLTop = 1 - blend;
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this->targetBlendLBottom = this->targetBlendLBottom = blend;
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mixToTarget();
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}
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void mixTo(float panL, float volL, float panR, float volR)
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{
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float aTop = (volL <= SPLIT_DB_MIN) ? 0 : db2a(volL);
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float aBottom = (volL <= SPLIT_DB_MIN) ? 0 : db2a(volR);
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if (this->outputBuffers.size() == 1)
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{
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// ignore pan. The R values actually have no effect.
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this->targetBlendLTop = this->targetBlendRTop = aTop;
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this->targetBlendLBottom = this->targetBlendRBottom = aBottom;
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}
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else
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{
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float blendTop = (panL + 1) * 0.5;
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float blendBottom = (panR + 1) * 0.5;
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this->targetBlendLTop = (1 - blendTop) * aTop;
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this->targetBlendRTop = (blendTop)*aTop;
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this->targetBlendLBottom = (1 - blendBottom) * aBottom;
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this->targetBlendRBottom = (blendBottom)*aBottom;
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}
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mixToTarget();
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}
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virtual void SetBypass(bool enabled)
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{
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throw PiPedalArgumentException("Not implmented. Should not have been called.");
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}
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virtual float GetOutputControlValue(int index) const {
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return GetControlValue(index);
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}
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virtual float GetControlValue(int portIndex) const
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{
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switch (portIndex)
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{
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case -1: /* (bypass) */
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return 1;
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case 0:
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{
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return (int)(this->splitType);
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}
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case 1:
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{
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return selectA ? 0 : 1;
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}
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case 2:
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return mix;
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case 3:
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return this->panL;
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case 4:
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return this->volL;
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case 5:
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return this->panR;
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case 6:
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return this->volR;
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default:
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throw PiPedalArgumentException("Invalid argument");
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}
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}
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virtual void SetControl(int index, float value)
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{
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switch (index)
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{
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case -1: /* (bypass) */
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return; // no can bypass.
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case 0:
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{
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SplitType t = valueToSplitType(value);
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if (splitType != t)
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{
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splitType = t;
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updateMixFunction();
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}
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break;
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}
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case 1:
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{
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bool t = value == 0;
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if (selectA != t)
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{
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selectA = t;
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if (splitType == SplitType::Ab)
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{
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mixTo(selectA ? -1 : 1);
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}
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}
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break;
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}
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case 2:
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mix = value;
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if (splitType == SplitType::Mix)
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{
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mixTo(value);
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}
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break;
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case 3:
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panL = value;
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if (splitType == SplitType::Lr)
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{
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mixTo(panL, volL, panR, volR);
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}
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break;
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case 4:
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volL = value;
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if (splitType == SplitType::Lr)
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{
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mixTo(panL, volL, panR, volR);
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}
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break;
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case 5:
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panR = value;
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if (splitType == SplitType::Lr)
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{
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mixTo(panL, volL, panR, volR);
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}
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break;
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case 6:
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volR = value;
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if (splitType == SplitType::Lr)
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{
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mixTo(panL, volL, panR, volR);
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}
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break;
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}
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}
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virtual int GetNumberOfOutputAudioPorts() const
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{
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return numberOfOutputPorts;
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}
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virtual int GetNumberOfInputAudioPorts() const
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{
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return (int)this->inputs.size();
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}
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virtual float *GetAudioInputBuffer(int index) const
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{
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return inputs[index];
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}
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virtual float *GetAudioOutputBuffer(int index) const
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{
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return this->outputBuffers[index];
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}
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virtual void SetAudioOutputBuffer(int index, float *buffer)
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{
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outputBuffers[index] = buffer;
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}
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void PreMix(uint32_t frames)
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{
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(this->*preAbTop)(frames);
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(this->*preAbBottom)(frames);
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}
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void PostMixMono(uint32_t frames)
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{
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uint32_t ix = 0;
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float *top = this->mixTopInputs[0];
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float *bottom = this->mixBottomInputs[0];
|
|
float *output = this->outputBuffers[0];
|
|
|
|
while (frames)
|
|
{
|
|
if (this->blendFadeSamples != 0)
|
|
{
|
|
uint32_t framesThisTime = this->blendFadeSamples < frames ? this->blendFadeSamples : frames;
|
|
for (uint32_t i = 0; i < framesThisTime; ++i)
|
|
{
|
|
output[ix] = blendLBottom * bottom[ix] + blendLTop * top[ix];
|
|
++ix;
|
|
|
|
this->blendLTop += this->blendDxLTop;
|
|
this->blendLBottom += this->blendDxLBottom;
|
|
}
|
|
this->blendFadeSamples -= framesThisTime;
|
|
frames -= framesThisTime;
|
|
if (blendFadeSamples == 0)
|
|
{
|
|
this->blendLTop = this->targetBlendLTop;
|
|
this->blendLBottom = this->targetBlendLBottom;
|
|
this->blendDxLTop = this->blendDxLBottom = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
float blendTop = this->blendLTop;
|
|
float blendBottom = this->blendLBottom;
|
|
while (frames--)
|
|
{
|
|
output[ix] = blendBottom * bottom[ix] + blendTop * top[ix];
|
|
++ix;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void PostMixStereo(uint32_t frames)
|
|
{
|
|
uint32_t ix = 0;
|
|
|
|
float *top = this->mixTopInputs[0];
|
|
float *bottom = this->mixBottomInputs[0];
|
|
float *output = this->outputBuffers[0];
|
|
|
|
float *topR = this->mixTopInputs[1];
|
|
float *bottomR = this->mixBottomInputs[1];
|
|
float *outputR = this->outputBuffers[1];
|
|
|
|
while (frames != 0)
|
|
{
|
|
if (this->blendFadeSamples != 0)
|
|
{
|
|
uint32_t framesThisTime = this->blendFadeSamples < frames ? this->blendFadeSamples : frames;
|
|
for (int i = 0; i < framesThisTime; ++i)
|
|
{
|
|
output[ix] = blendLBottom * bottom[ix] + blendLTop * top[ix];
|
|
outputR[ix] = blendRBottom * bottomR[ix] + blendRTop * topR[ix];
|
|
++ix;
|
|
|
|
this->blendLTop += this->blendDxLTop;
|
|
this->blendRTop += this->blendDxRTop;
|
|
this->blendLBottom += this->blendDxLBottom;
|
|
this->blendRBottom += this->blendDxRBottom;
|
|
}
|
|
blendFadeSamples -= framesThisTime;
|
|
frames -= framesThisTime;
|
|
if (blendFadeSamples == 0)
|
|
{
|
|
this->blendLTop = this->targetBlendLTop;
|
|
this->blendRTop = this->targetBlendRTop;
|
|
this->blendLBottom = this->targetBlendLBottom;
|
|
this->blendRBottom = this->targetBlendRBottom;
|
|
this->blendDxLTop = this->blendDxRTop = this->blendDxLBottom = this->blendDxRBottom = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
float blendLTop = this->blendLTop;
|
|
float blendRTop = this->blendRTop;
|
|
float blendLBottom = this->blendLBottom;
|
|
float blendRBottom = this->blendRBottom;
|
|
|
|
for (int i = 0; i < frames; ++i)
|
|
{
|
|
output[ix] = blendLBottom * bottom[ix] + blendLTop * top[ix];
|
|
outputR[ix] = blendRBottom * bottomR[ix] + blendRTop * topR[ix];
|
|
++ix;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void PostMix(uint32_t frames)
|
|
{
|
|
if (this->outputBuffers.size() == 1)
|
|
{
|
|
PostMixMono(frames);
|
|
}
|
|
else
|
|
{
|
|
PostMixStereo(frames);
|
|
}
|
|
}
|
|
};
|
|
|
|
} // namespace
|