mirror of
https://github.com/cookiengineer/audacity
synced 2025-05-03 09:09:47 +02:00
389 lines
9.9 KiB
C++
389 lines
9.9 KiB
C++
/**********************************************************************
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Audacity: A Digital Audio Editor
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Wahwah.cpp
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Effect programming:
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Nasca Octavian Paul (Paul Nasca)
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UI programming:
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Dominic Mazzoni (with the help of wxDesigner)
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Vaughan Johnson (Preview)
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*******************************************************************//**
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\class EffectWahwah
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\brief An Effect that adds a 'spectral glide'.
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*//*******************************************************************/
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#include "../Audacity.h"
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#include "Wahwah.h"
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#include <math.h>
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#include <wx/intl.h>
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#include "../ShuttleGui.h"
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#include "../widgets/valnum.h"
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enum
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{
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ID_Freq = 10000,
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ID_Phase,
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ID_Depth,
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ID_Res,
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ID_FreqOfs
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};
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// Define keys, defaults, minimums, and maximums for the effect parameters
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//
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// Name Type Key Def Min Max Scale
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Param( Freq, double, XO("Freq"), 1.5, 0.1, 4.0, 10 );
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Param( Phase, double, XO("Phase"), 0.0, 0.0, 359.0, 1 );
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Param( Depth, int, XO("Depth"), 70, 0, 100, 1 ); // scaled to 0-1 before processing
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Param( Res, double, XO("Resonance"), 2.5, 0.1, 10.0, 10 );
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Param( FreqOfs, int, XO("Offset"), 30, 0, 100, 1 ); // scaled to 0-1 before processing
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// How many samples are processed before recomputing the lfo value again
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#define lfoskipsamples 30
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//
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// EffectWahwah
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//
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BEGIN_EVENT_TABLE(EffectWahwah, wxEvtHandler)
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EVT_SLIDER(ID_Freq, EffectWahwah::OnFreqSlider)
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EVT_SLIDER(ID_Phase, EffectWahwah::OnPhaseSlider)
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EVT_SLIDER(ID_Depth, EffectWahwah::OnDepthSlider)
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EVT_SLIDER(ID_Res, EffectWahwah::OnResonanceSlider)
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EVT_SLIDER(ID_FreqOfs, EffectWahwah::OnFreqOffSlider)
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EVT_TEXT(ID_Freq, EffectWahwah::OnFreqText)
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EVT_TEXT(ID_Phase, EffectWahwah::OnPhaseText)
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EVT_TEXT(ID_Depth, EffectWahwah::OnDepthText)
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EVT_TEXT(ID_Res, EffectWahwah::OnResonanceText)
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EVT_TEXT(ID_FreqOfs, EffectWahwah::OnFreqOffText)
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END_EVENT_TABLE();
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EffectWahwah::EffectWahwah()
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{
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mFreq = DEF_Freq;
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mPhase = DEF_Phase;
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mDepth = DEF_Depth;
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mRes = DEF_Res;
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mFreqOfs = DEF_FreqOfs;
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SetLinearEffectFlag(true);
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}
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EffectWahwah::~EffectWahwah()
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{
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}
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// IdentInterface implementation
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wxString EffectWahwah::GetSymbol()
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{
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return WAHWAH_PLUGIN_SYMBOL;
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}
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wxString EffectWahwah::GetDescription()
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{
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return XO("Rapid tone quality variations, like that guitar sound so popular in the 1970's");
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}
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// EffectIdentInterface implementation
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EffectType EffectWahwah::GetType()
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{
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return EffectTypeProcess;
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}
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// EffectClientInterface implementation
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int EffectWahwah::GetAudioInCount()
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{
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return 1;
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}
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int EffectWahwah::GetAudioOutCount()
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{
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return 1;
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}
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bool EffectWahwah::ProcessInitialize(sampleCount WXUNUSED(totalLen), ChannelNames chanMap)
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{
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lfoskip = mFreq * 2 * M_PI / mSampleRate;
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skipcount = 0;
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xn1 = 0;
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xn2 = 0;
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yn1 = 0;
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yn2 = 0;
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b0 = 0;
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b1 = 0;
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b2 = 0;
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a0 = 0;
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a1 = 0;
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a2 = 0;
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depth = mDepth / 100.0;
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freqofs = mFreqOfs / 100.0;
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phase = mPhase * M_PI / 180.0;
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if (chanMap[0] == ChannelNameFrontRight)
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{
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phase += M_PI;
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}
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return true;
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}
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sampleCount EffectWahwah::ProcessBlock(float **inBlock, float **outBlock, sampleCount blockLen)
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{
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float *ibuf = inBlock[0];
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float *obuf = outBlock[0];
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double frequency, omega, sn, cs, alpha;
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double in, out;
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for (int i = 0; i < blockLen; i++)
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{
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in = (double) ibuf[i];
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if ((skipcount++) % lfoskipsamples == 0)
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{
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frequency = (1 + cos(skipcount * lfoskip + phase)) / 2;
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frequency = frequency * depth * (1 - freqofs) + freqofs;
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frequency = exp((frequency - 1) * 6);
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omega = M_PI * frequency;
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sn = sin(omega);
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cs = cos(omega);
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alpha = sn / (2 * mRes);
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b0 = (1 - cs) / 2;
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b1 = 1 - cs;
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b2 = (1 - cs) / 2;
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a0 = 1 + alpha;
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a1 = -2 * cs;
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a2 = 1 - alpha;
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};
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out = (b0 * in + b1 * xn1 + b2 * xn2 - a1 * yn1 - a2 * yn2) / a0;
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xn2 = xn1;
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xn1 = in;
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yn2 = yn1;
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yn1 = out;
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obuf[i] = (float) out;
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}
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return blockLen;
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}
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bool EffectWahwah::GetAutomationParameters(EffectAutomationParameters & parms)
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{
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parms.Write(KEY_Freq, mFreq);
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parms.Write(KEY_Phase, mPhase);
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parms.Write(KEY_Depth, mDepth);
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parms.Write(KEY_Res, mRes);
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parms.Write(KEY_FreqOfs, mFreqOfs);
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return true;
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}
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bool EffectWahwah::SetAutomationParameters(EffectAutomationParameters & parms)
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{
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ReadAndVerifyDouble(Freq);
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ReadAndVerifyDouble(Phase);
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ReadAndVerifyInt(Depth);
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ReadAndVerifyDouble(Res);
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ReadAndVerifyInt(FreqOfs);
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mFreq = Freq;
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mPhase = Phase;
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mDepth = Depth;
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mRes = Res;
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mFreqOfs = FreqOfs;
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return true;
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}
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// Effect implementation
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void EffectWahwah::PopulateOrExchange(ShuttleGui & S)
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{
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S.SetBorder(5);
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S.AddSpace(0, 5);
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S.StartMultiColumn(3, wxEXPAND);
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{
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S.SetStretchyCol(2);
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FloatingPointValidator<double> vldfreq(1, &mFreq);
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vldfreq.SetRange(MIN_Freq, MAX_Freq);
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mFreqT = S.Id(ID_Freq).AddTextBox(_("LFO Frequency (Hz):"), wxT(""), 12);
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mFreqT->SetValidator(vldfreq);
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S.SetStyle(wxSL_HORIZONTAL);
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mFreqS = S.Id(ID_Freq).AddSlider(wxT(""), DEF_Freq * SCL_Freq, MAX_Freq * SCL_Freq, MIN_Freq * SCL_Freq);
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mFreqS->SetName(_("LFO frequency in hertz"));
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mFreqS->SetMinSize(wxSize(100, -1));
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FloatingPointValidator<double> vldphase(1, &mPhase);
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vldphase.SetRange(MIN_Phase, MAX_Phase);
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mPhaseT = S.Id(ID_Phase).AddTextBox(_("LFO Start Phase (deg.):"), wxT(""), 12);
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mPhaseT->SetValidator(vldphase);
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S.SetStyle(wxSL_HORIZONTAL);
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mPhaseS = S.Id(ID_Phase).AddSlider(wxT(""), DEF_Phase * SCL_Phase, MAX_Phase * SCL_Phase, MIN_Phase * SCL_Phase);
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mPhaseS->SetName(_("LFO start phase in degrees"));
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mPhaseS->SetLineSize(10);
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mPhaseS->SetMinSize(wxSize(100, -1));
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IntegerValidator<int> vlddepth(&mDepth);
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vlddepth.SetRange(MIN_Depth, MAX_Depth);
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mDepthT = S.Id(ID_Depth).AddTextBox(_("Depth (%):"), wxT(""), 12);
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mDepthT->SetValidator(vlddepth);
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S.SetStyle(wxSL_HORIZONTAL);
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mDepthS = S.Id(ID_Depth).AddSlider(wxT(""), DEF_Depth * SCL_Depth, MAX_Depth * SCL_Depth, MIN_Depth * SCL_Depth);
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mDepthS->SetName(_("Depth in percent"));
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mDepthS->SetMinSize(wxSize(100, -1));
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FloatingPointValidator<double> vldres(1, &mRes);
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vldres.SetRange(MIN_Res, MAX_Res);
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mResT = S.Id(ID_Res).AddTextBox(_("Resonance:"), wxT(""), 12);
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mResT->SetValidator(vldres);
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S.SetStyle(wxSL_HORIZONTAL);
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mResS = S.Id(ID_Res).AddSlider(wxT(""), DEF_Res * SCL_Res, MAX_Res * SCL_Res, MIN_Res * SCL_Res);
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mResS->SetName(_("Resonance"));
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mResS->SetMinSize(wxSize(100, -1));
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IntegerValidator<int> vldfreqoffset(&mFreqOfs);
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vldfreqoffset.SetRange(MIN_FreqOfs, MAX_FreqOfs);
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mFreqOfsT = S.Id(ID_FreqOfs).AddTextBox(_("Wah Frequency Offset (%):"), wxT(""), 12);
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mFreqOfsT->SetValidator(vldfreqoffset);
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S.SetStyle(wxSL_HORIZONTAL);
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mFreqOfsS = S.Id(ID_FreqOfs).AddSlider(wxT(""), DEF_FreqOfs * SCL_FreqOfs, MAX_FreqOfs * SCL_FreqOfs, MIN_FreqOfs * SCL_FreqOfs);
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mFreqOfsT->SetName(_("Wah frequency offset in percent"));
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mFreqOfsT->SetMinSize(wxSize(100, -1));
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}
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S.EndMultiColumn();
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}
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bool EffectWahwah::TransferDataToWindow()
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{
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if (!mUIParent->TransferDataToWindow())
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{
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return false;
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}
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mFreqS->SetValue((int) (mFreq * SCL_Freq));
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mPhaseS->SetValue((int) (mPhase * SCL_Phase));
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mDepthS->SetValue((int) (mDepth * SCL_Depth));
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mResS->SetValue((int) (mRes * SCL_Res));
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mFreqOfsS->SetValue((int) (mFreqOfs * SCL_FreqOfs));
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return true;
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}
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bool EffectWahwah::TransferDataFromWindow()
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{
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if (!mUIParent->Validate() || !mUIParent->TransferDataFromWindow())
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{
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return false;
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}
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return true;
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}
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// EffectWahwah implementation
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void EffectWahwah::OnFreqSlider(wxCommandEvent & evt)
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{
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mFreq = (double) evt.GetInt() / SCL_Freq;
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mFreqT->GetValidator()->TransferToWindow();
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EnableApply(mUIParent->Validate());
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}
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void EffectWahwah::OnPhaseSlider(wxCommandEvent & evt)
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{
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int val = ((evt.GetInt() + 5) / 10) * 10; // round to nearest multiple of 10
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val = val > MAX_Phase * SCL_Phase ? MAX_Phase * SCL_Phase : val;
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mPhaseS->SetValue(val);
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mPhase = (double) val / SCL_Phase;
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mPhaseT->GetValidator()->TransferToWindow();
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EnableApply(mUIParent->Validate());
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}
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void EffectWahwah::OnDepthSlider(wxCommandEvent & evt)
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{
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mDepth = evt.GetInt() / SCL_Depth;
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mDepthT->GetValidator()->TransferToWindow();
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EnableApply(mUIParent->Validate());
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}
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void EffectWahwah::OnResonanceSlider(wxCommandEvent & evt)
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{
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mRes = (double) evt.GetInt() / SCL_Res;
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mResT->GetValidator()->TransferToWindow();
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EnableApply(mUIParent->Validate());
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}
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void EffectWahwah::OnFreqOffSlider(wxCommandEvent & evt)
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{
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mFreqOfs = evt.GetInt() / SCL_FreqOfs;
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mFreqOfsT->GetValidator()->TransferToWindow();
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EnableApply(mUIParent->Validate());
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}
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void EffectWahwah::OnFreqText(wxCommandEvent & WXUNUSED(evt))
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{
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if (!EnableApply(mUIParent->TransferDataFromWindow()))
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{
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return;
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}
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mFreqS->SetValue((int) (mFreq * SCL_Freq));
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}
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void EffectWahwah::OnPhaseText(wxCommandEvent & WXUNUSED(evt))
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{
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if (!EnableApply(mUIParent->TransferDataFromWindow()))
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{
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return;
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}
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mPhaseS->SetValue((int) (mPhase * SCL_Phase));
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}
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void EffectWahwah::OnDepthText(wxCommandEvent & WXUNUSED(evt))
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{
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if (!EnableApply(mUIParent->TransferDataFromWindow()))
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{
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return;
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}
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mDepthS->SetValue((int) (mDepth * SCL_Depth));
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}
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void EffectWahwah::OnResonanceText(wxCommandEvent & WXUNUSED(evt))
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{
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if (!EnableApply(mUIParent->TransferDataFromWindow()))
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{
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return;
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}
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mResS->SetValue((int) (mRes * SCL_Res));
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}
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void EffectWahwah::OnFreqOffText(wxCommandEvent & WXUNUSED(evt))
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{
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if (!EnableApply(mUIParent->TransferDataFromWindow()))
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{
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return;
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}
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mFreqOfsS->SetValue((int) (mFreqOfs * SCL_FreqOfs));
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}
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