123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/*
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* Chorus.h
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* --------
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* Purpose: Implementation of the DMO Chorus DSP (for non-Windows platforms)
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#pragma once
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#include "openmpt/all/BuildSettings.hpp"
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#ifndef NO_PLUGINS
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#include "../PlugInterface.h"
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OPENMPT_NAMESPACE_BEGIN
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namespace DMO
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{
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class Chorus : public IMixPlugin
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{
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protected:
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enum Parameters
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{
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kChorusWetDryMix = 0,
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kChorusDepth,
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kChorusFrequency,
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kChorusWaveShape,
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kChorusPhase,
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kChorusFeedback,
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kChorusDelay,
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kChorusNumParameters
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};
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std::array<float, kChorusNumParameters> m_param;
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// Calculated parameters
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float m_waveShapeMin, m_waveShapeMax, m_waveShapeVal;
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float m_depthDelay;
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float m_frequency;
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int32 m_delayOffset;
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const bool m_isFlanger = false;
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// State
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std::vector<float> m_bufferL, m_bufferR; // Only m_bufferL is used in case of !m_isFlanger
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std::array<float, 3> m_DryBufferL, m_DryBufferR;
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int32 m_bufPos = 0, m_bufSize = 0;
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int32 m_delayL = 0, m_delayR = 0;
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int32 m_dryWritePos = 0;
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public:
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static IMixPlugin* Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
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Chorus(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct, bool stereoBuffers = false);
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void Release() override { delete this; }
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int32 GetUID() const override { return 0xEFE6629C; }
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int32 GetVersion() const override { return 0; }
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void Idle() override { }
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uint32 GetLatency() const override { return 0; }
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void Process(float *pOutL, float *pOutR, uint32 numFrames) override;
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float RenderSilence(uint32) override { return 0.0f; }
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int32 GetNumPrograms() const override { return 0; }
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int32 GetCurrentProgram() override { return 0; }
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void SetCurrentProgram(int32) override { }
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PlugParamIndex GetNumParameters() const override { return kChorusNumParameters; }
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PlugParamValue GetParameter(PlugParamIndex index) override;
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void SetParameter(PlugParamIndex index, PlugParamValue value) override;
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void Resume() override;
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void Suspend() override { m_isResumed = false; }
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void PositionChanged() override;
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bool IsInstrument() const override { return false; }
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bool CanRecieveMidiEvents() override { return false; }
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bool ShouldProcessSilence() override { return true; }
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#ifdef MODPLUG_TRACKER
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CString GetDefaultEffectName() override { return _T("Chorus"); }
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CString GetParamName(PlugParamIndex param) override;
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CString GetParamLabel(PlugParamIndex) override;
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CString GetParamDisplay(PlugParamIndex param) override;
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CString GetCurrentProgramName() override { return CString(); }
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void SetCurrentProgramName(const CString &) override { }
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CString GetProgramName(int32) override { return CString(); }
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bool HasEditor() const override { return false; }
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#endif
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void BeginSetProgram(int32) override { }
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void EndSetProgram() override { }
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int GetNumInputChannels() const override { return 2; }
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int GetNumOutputChannels() const override { return 2; }
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protected:
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int32 GetBufferIntOffset(int32 fpOffset) const;
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virtual float WetDryMix() const { return m_param[kChorusWetDryMix]; }
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virtual bool IsTriangle() const { return m_param[kChorusWaveShape] < 1; }
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virtual float Depth() const { return m_param[kChorusDepth]; }
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virtual float Feedback() const { return -99.0f + m_param[kChorusFeedback] * 198.0f; }
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virtual float Delay() const { return m_param[kChorusDelay] * 20.0f; }
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virtual float FrequencyInHertz() const { return m_param[kChorusFrequency] * 10.0f; }
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virtual int Phase() const { return mpt::saturate_round<uint32>(m_param[kChorusPhase] * 4.0f); }
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void RecalculateChorusParams();
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};
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} // namespace DMO
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OPENMPT_NAMESPACE_END
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#endif // !NO_PLUGINS
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