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Added 3 Band EQ

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pull/764/head
Javier Nonis 6 months ago
parent 6d673aa8be
commit d6fbbb508d
5 changed files with 216 additions and 3 deletions
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  1. 176
      src/effect_3bandeq.h
  2. 1
      src/effect_base.h
  3. 4
      src/effects.h
  4. 36
      src/uimenu.cpp
  5. 2
      src/uimenu.h

176
src/effect_3bandeq.h
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@ -0,0 +1,176 @@
/*
* DISTHRO 3 Band EQ
* Ported from https://github.com/DISTRHO/Mini-Series/blob/master/plugins/3BandEQ
*
* Javier Nonis (https://github.com/jnonis) - 2024
*/
#ifndef _EFFECT_3BANDEQ_H
#define _EFFECT_3BANDEQ_H
#include <cmath>
#include "effect_base.h"
class AudioEffect3BandEQ : public AudioEffect
{
public:
static constexpr float kAMP_DB = 8.656170245f;
static constexpr float kDC_ADD = 1e-30f;
static constexpr float kPI = 3.141592654f;
enum Param
{
BYPASS,
EQ_LOW,
EQ_MID,
EQ_HIGH,
MASTER,
LOW_MID_FQ,
MID_HIGH_FQ,
UNKNOWN
};
AudioEffect3BandEQ(float32_t samplerate) : AudioEffect(samplerate)
{
// Default values
fLow = 0.0f;
fMid = 0.0f;
fHigh = 0.0f;
fMaster = 0.0f;
fLowMidFreq = 440.0f;
fMidHighFreq = 2000.0f;
// Internal stuff
lowVol = midVol = highVol = outVol = 1.0f;
freqLP = 200.0f;
freqHP = 2000.0f;
// reset filter values
xLP = std::exp(-2.0f * kPI * freqLP / samplerate);
a0LP = 1.0f - xLP;
b1LP = -xLP;
xHP = std::exp(-2.0f * kPI * freqHP / samplerate);
a0HP = 1.0f - xHP;
b1HP = -xHP;
out1LP = out2LP = out1HP = out2HP = 0.0f;
tmp1LP = tmp2LP = tmp1HP = tmp2HP = 0.0f;
}
virtual ~AudioEffect3BandEQ()
{
}
virtual unsigned getId()
{
return EFFECT_3BANDEQ;
}
virtual void setParameter(unsigned param, unsigned value)
{
switch (param)
{
case AudioEffect3BandEQ::Param::BYPASS:
this->setBypass(value == 1);
break;
case AudioEffect3BandEQ::Param::EQ_LOW:
fLow = (value / 100.0f) * 48.0f - 24.0f;
lowVol = std::exp( (fLow/48.0f) * 48.0f / kAMP_DB);
break;
case AudioEffect3BandEQ::Param::EQ_MID:
fMid = (value / 100.0f) * 48.0f - 24.0f;
midVol = std::exp( (fMid/48.0f) * 48.0f / kAMP_DB);
break;
case AudioEffect3BandEQ::Param::EQ_HIGH:
fHigh = (value / 100.0f) * 48.0f - 24.0f;
highVol = std::exp( (fHigh/48.0f) * 48.0f / kAMP_DB);
break;
case AudioEffect3BandEQ::Param::MASTER:
fMaster = (value / 100.0f) * 48.0f - 24.0f;
outVol = std::exp( (fMaster/48.0f) * 48.0f / kAMP_DB);
break;
case AudioEffect3BandEQ::Param::LOW_MID_FQ:
fLowMidFreq = std::min((float) value, fMidHighFreq);
freqLP = fLowMidFreq;
xLP = std::exp(-2.0f * kPI * freqLP / (float)samplerate);
a0LP = 1.0f - xLP;
b1LP = -xLP;
break;
case AudioEffect3BandEQ::Param::MID_HIGH_FQ:
fMidHighFreq = std::max((float) value, fLowMidFreq);
freqHP = fMidHighFreq;
xHP = std::exp(-2.0f * kPI * freqHP / (float)samplerate);
a0HP = 1.0f - xHP;
b1HP = -xHP;
break;
default:
break;
}
}
virtual unsigned getParameter(unsigned param)
{
switch (param)
{
case AudioEffect3BandEQ::Param::BYPASS:
return this->getBypass() ? 1 : 0;
case AudioEffect3BandEQ::Param::EQ_LOW:
return roundf(((fLow + 24.0f) / 48.0f) * 100.0f);
case AudioEffect3BandEQ::Param::EQ_MID:
return roundf(((fMid + 24.0f) / 48.0f) * 100.0f);
case AudioEffect3BandEQ::Param::EQ_HIGH:
return roundf(((fHigh + 24.0f) / 48.0f) * 100.0f);
case AudioEffect3BandEQ::Param::MASTER:
return roundf(((fMaster + 24.0f) / 48.0f) * 100.0f);
case AudioEffect3BandEQ::Param::LOW_MID_FQ:
return fLowMidFreq;
case AudioEffect3BandEQ::Param::MID_HIGH_FQ:
return fMidHighFreq;
default:
return 0;
}
}
protected:
virtual size_t getParametersSize()
{
return AudioEffect3BandEQ::Param::UNKNOWN;
}
virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len)
{
const float* in1 = inblockL;
const float* in2 = inblockR;
float* out1 = outblockL;
float* out2 = outblockR;
for (uint32_t i=0; i < len; ++i)
{
tmp1LP = a0LP * in1[i] - b1LP * tmp1LP + kDC_ADD;
tmp2LP = a0LP * in2[i] - b1LP * tmp2LP + kDC_ADD;
out1LP = tmp1LP - kDC_ADD;
out2LP = tmp2LP - kDC_ADD;
tmp1HP = a0HP * in1[i] - b1HP * tmp1HP + kDC_ADD;
tmp2HP = a0HP * in2[i] - b1HP * tmp2HP + kDC_ADD;
out1HP = in1[i] - tmp1HP - kDC_ADD;
out2HP = in2[i] - tmp2HP - kDC_ADD;
out1[i] = (out1LP*lowVol + (in1[i] - out1LP - out1HP)*midVol + out1HP*highVol) * outVol;
out2[i] = (out2LP*lowVol + (in2[i] - out2LP - out2HP)*midVol + out2HP*highVol) * outVol;
}
}
private:
float fLow, fMid, fHigh, fMaster, fLowMidFreq, fMidHighFreq;
float lowVol, midVol, highVol, outVol;
float freqLP, freqHP;
float xLP, a0LP, b1LP;
float xHP, a0HP, b1HP;
float out1LP, out2LP, out1HP, out2HP;
float tmp1LP, tmp2LP, tmp1HP, tmp2HP;
};
#endif // _EFFECT_3BANDEQ_H

1
src/effect_base.h
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@ -17,6 +17,7 @@
#define EFFECT_TALREVERB3 6
#define EFFECT_REVERB 7
#define EFFECT_MVERB 8
#define EFFECT_3BANDEQ 9
class AudioEffect
{

4
src/effects.h
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@ -15,6 +15,7 @@
#include "effect_talreverb3.h"
#include "effect_platervbstereo.h"
#include "effect_mverb.h"
#include "effect_3bandeq.h"
inline AudioEffect* newAudioEffect(unsigned type, float32_t samplerate)
{
@ -36,6 +37,8 @@ inline AudioEffect* newAudioEffect(unsigned type, float32_t samplerate)
return new AudioEffectPlateReverb(samplerate);
case EFFECT_MVERB:
return new AudioEffectMVerb(samplerate);
case EFFECT_3BANDEQ:
return new AudioEffect3BandEQ(samplerate);
case EFFECT_NONE:
default:
return new AudioEffectNone(samplerate);
@ -54,6 +57,7 @@ inline std::string getFXTypeName(int nValue)
case EFFECT_TALREVERB3: return "TalRvrb3";
case EFFECT_REVERB: return "Reverb";
case EFFECT_MVERB: return "MVerb";
case EFFECT_3BANDEQ: return "3Band EQ";
case EFFECT_NONE:
default: return "None";
}

36
src/uimenu.cpp
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@ -252,6 +252,18 @@ CUIMenu::TMenuItem CUIMenu::s_FXMVerb[] =
{0}
};
CUIMenu::TMenuItem CUIMenu::s_FX3BandEQ[] =
{
{"Bypass", EditTGFXParameter, 0, AudioEffect3BandEQ::Param::BYPASS},
{"Low", EditTGFXParameter, 0, AudioEffect3BandEQ::Param::EQ_LOW},
{"Mid", EditTGFXParameter, 0, AudioEffect3BandEQ::Param::EQ_MID},
{"High", EditTGFXParameter, 0, AudioEffect3BandEQ::Param::EQ_HIGH},
{"Master", EditTGFXParameter, 0, AudioEffect3BandEQ::Param::MASTER},
{"Low Mid FQ", EditTGFXParameter, 0, AudioEffect3BandEQ::Param::LOW_MID_FQ},
{"Mid High FQ", EditTGFXParameter, 0, AudioEffect3BandEQ::Param::MID_HIGH_FQ},
{0}
};
const CUIMenu::TMenuItem CUIMenu::s_MidiFX[] =
{
{"Type:", EditTGParameter2, 0, CMiniDexed::TGParameterMidiFXType},
@ -351,7 +363,7 @@ const CUIMenu::TMenuItem CUIMenu::s_SaveMenu[] =
const CUIMenu::TParameter CUIMenu::s_GlobalParameter[CMiniDexed::ParameterUnknown] =
{
{0, 1, 1, ToOnOff}, // ParameterCompressorEnable
{0, 8, 1, ToFXType}, // ParameterSendFXType
{0, 9, 1, ToFXType}, // ParameterSendFXType
{0, 100, 1}, // ParameterSendFXLevel
{0, 1, 1, ToOnOff}, // ParameterReverbEnable
{0, 99, 1}, // ParameterReverbSize
@ -374,7 +386,7 @@ const CUIMenu::TParameter CUIMenu::s_TGParameter[CMiniDexed::TGParameterUnknown]
{0, CSysExFileLoader::VoicesPerBank-1, 1}, // TGParameterProgram
{0, 127, 8, ToVolume}, // TGParameterVolume
{0, 127, 8, ToPan}, // TGParameterPan
{0, 8, 1, ToFXType}, // TGParameterInsertFXType
{0, 9, 1, ToFXType}, // TGParameterInsertFXType
{0, 1, 1, ToMidiFXType}, // TGParameterMidiFXType
{-99, 99, 1}, // TGParameterMasterTune
{0, 99, 1}, // TGParameterCutoff
@ -481,7 +493,7 @@ const CUIMenu::TParameter CUIMenu::s_TGFXReverbParam[AudioEffectPlateReverb::Par
{0, 99, 1}, // LEVEL
};
// must match AudioEffectPlateReverb::Param
// must match AudioEffectMVerb::Param
const CUIMenu::TParameter CUIMenu::s_TGFXMVerbParam[AudioEffectMVerb::Param::UNKNOWN] =
{
{0, 1, 1, ToOnOff}, // BYPASS
@ -496,6 +508,18 @@ const CUIMenu::TParameter CUIMenu::s_TGFXMVerbParam[AudioEffectMVerb::Param::UNK
{0, 100, 1}, // EARLYMIX
};
// must match AudioEffect3BandEQ::Param
const CUIMenu::TParameter CUIMenu::s_TGFX3BandEQParam[AudioEffect3BandEQ::Param::UNKNOWN] =
{
{0, 1, 1, ToOnOff}, // BYPASS
{0, 100, 1}, // LOW
{0, 100, 1}, // MID
{0, 100, 1}, // HIGH
{0, 100, 1}, // MASTER
{0, 1000, 10}, // LOW_MID_FQ
{1000, 20000, 10}, // MID_HIGH_FQ
};
// must match MidiArp::Param
const CUIMenu::TParameter CUIMenu::s_TGMidiFXArpParam[MidiArp::Param::UNKNOWN] =
{
@ -2938,6 +2962,9 @@ CUIMenu::TMenuItem* CUIMenu::getFXMenuItem(unsigned type)
case EFFECT_MVERB:
menu = s_FXMVerb;
break;
case EFFECT_3BANDEQ:
menu = s_FX3BandEQ;
break;
case EFFECT_NONE:
default:
menu = s_FXNone;
@ -2999,6 +3026,9 @@ CUIMenu::TParameter CUIMenu::getFXParameter(unsigned type, unsigned nParam)
case EFFECT_MVERB:
pParam = s_TGFXMVerbParam[nParam];
break;
case EFFECT_3BANDEQ:
pParam = s_TGFX3BandEQParam[nParam];
break;
default:
break;
}

2
src/uimenu.h
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@ -183,6 +183,7 @@ private:
static TMenuItem s_FXTalReverb3[];
static TMenuItem s_FXReverb[];
static TMenuItem s_FXMVerb[];
static TMenuItem s_FX3BandEQ[];
static TMenuItem s_MidiFXNone[];
static TMenuItem s_MidiFXArp[];
@ -207,6 +208,7 @@ private:
static const TParameter s_TGFXTalReverb3Param[];
static const TParameter s_TGFXReverbParam[];
static const TParameter s_TGFXMVerbParam[];
static const TParameter s_TGFX3BandEQParam[];
static const TParameter s_TGMidiFXArpParam[];
static const TParameter s_VoiceParameter[];
static const TParameter s_OPParameter[];

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