/*
* File: Deckwrecka.cpp
*
* Version: 1.0
*
* Created: 10/23/13
*
* Copyright: Copyright � 2013 Airwindows, All Rights Reserved
*
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/*=============================================================================
Deckwrecka.cpp
=============================================================================*/
#include "Deckwrecka.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Deckwrecka)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Deckwrecka::Deckwrecka
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Deckwrecka::Deckwrecka(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_One, kDefaultValue_ParamOne );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Deckwrecka::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Deckwrecka::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Deckwrecka::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Deckwrecka::GetParameterInfo(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
ComponentResult result = noErr;
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
| kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global) {
switch(inParameterID)
{
case kParam_One:
AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamOne;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Deckwrecka::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Deckwrecka::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Deckwrecka::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Deckwrecka::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Deckwrecka::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Deckwrecka::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____DeckwreckaEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Deckwrecka::DeckwreckaKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Deckwrecka::DeckwreckaKernel::Reset()
{
bflip = 1;
iirHeadBumpA = 0.0;
iirHeadBumpB = 0.0;
iirHeadBumpC = 0.0;
iirSampleA = 0.0;
iirSampleB = 0.0;
iirSampleC = 0.0;
iirSampleD = 0.0;
iirSampleE = 0.0;
iirSampleF = 0.0;
iirSampleG = 0.0;
iirSampleH = 0.0;
iirSampleI = 0.0;
iirSampleJ = 0.0;
iirSampleK = 0.0;
iirSampleL = 0.0;
iirSampleM = 0.0;
iirSampleN = 0.0;
iirSampleO = 0.0;
iirSampleP = 0.0;
iirSampleQ = 0.0;
iirSampleR = 0.0;
iirSampleS = 0.0;
iirSampleT = 0.0;
iirSampleU = 0.0;
iirSampleV = 0.0;
iirSampleW = 0.0;
iirSampleX = 0.0;
iirSampleY = 0.0;
iirSampleZ = 0.0;
fpd = 17;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Deckwrecka::DeckwreckaKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Deckwrecka::DeckwreckaKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= GetSampleRate();
Float64 wreck = pow(GetParameter( kParam_One ),2);
Float64 randy;
Float64 HeadBump = 0.0;
Float64 HeadBumpFreq = 0.01/overallscale;
Float64 iirHPAmount = 0.0000014/overallscale;
Float64 altHPAmount = 1.0 - iirHPAmount;
Float64 inputSample;
Float64 tempSample;
Float64 bridgerectifier;
Float64 correction;
while (nSampleFrames-- > 0) {
inputSample = *sourceP;
if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37;
randy = (rand()/(double)RAND_MAX);
randy += (rand()/(double)RAND_MAX);
randy += (rand()/(double)RAND_MAX);
randy += (rand()/(double)RAND_MAX);
randy += (rand()/(double)RAND_MAX);
randy += (rand()/(double)RAND_MAX);
randy /= 6.0;
randy *= wreck; //0 to 1 the noise, may not be needed
//set up the noise
switch (bflip)
{
case 1:
iirHeadBumpA += (inputSample * randy);
iirHeadBumpA -= (iirHeadBumpA * iirHeadBumpA * iirHeadBumpA * HeadBumpFreq);
break;
case 2:
iirHeadBumpB += (inputSample * randy);
iirHeadBumpB -= (iirHeadBumpB * iirHeadBumpB * iirHeadBumpB * HeadBumpFreq);
break;
case 3:
iirHeadBumpC += (inputSample * randy);
iirHeadBumpC -= (iirHeadBumpC * iirHeadBumpC * iirHeadBumpC * HeadBumpFreq);
break;
}
HeadBump = iirHeadBumpA + iirHeadBumpB + iirHeadBumpC;
bflip++;
if (bflip < 1 || bflip > 3) bflip = 1;
tempSample = HeadBump;
iirSampleA = (iirSampleA * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleA; correction = iirSampleA;
iirSampleB = (iirSampleB * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleB; correction += iirSampleB;
iirSampleC = (iirSampleC * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleC; correction += iirSampleC;
iirSampleD = (iirSampleD * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleD; correction += iirSampleD;
iirSampleE = (iirSampleE * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleE; correction += iirSampleE;
iirSampleF = (iirSampleF * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleF; correction += iirSampleF;
iirSampleG = (iirSampleG * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleG; correction += iirSampleG;
iirSampleH = (iirSampleH * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleH; correction += iirSampleH;
iirSampleI = (iirSampleI * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleI; correction += iirSampleI;
iirSampleJ = (iirSampleJ * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleJ; correction += iirSampleJ;
iirSampleK = (iirSampleK * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleK; correction += iirSampleK;
iirSampleL = (iirSampleL * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleL; correction += iirSampleL;
iirSampleM = (iirSampleM * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleM; correction += iirSampleM;
iirSampleN = (iirSampleN * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleN; correction += iirSampleN;
iirSampleO = (iirSampleO * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleO; correction += iirSampleO;
iirSampleP = (iirSampleP * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleP; correction += iirSampleP;
iirSampleQ = (iirSampleQ * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleQ; correction += iirSampleQ;
iirSampleR = (iirSampleR * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleR; correction += iirSampleR;
iirSampleS = (iirSampleS * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleS; correction += iirSampleS;
iirSampleT = (iirSampleT * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleT; correction += iirSampleT;
iirSampleU = (iirSampleU * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleU; correction += iirSampleU;
iirSampleV = (iirSampleV * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleV; correction += iirSampleV;
iirSampleW = (iirSampleW * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleW; correction += iirSampleW;
iirSampleX = (iirSampleX * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleX; correction += iirSampleX;
iirSampleY = (iirSampleY * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleY; correction += iirSampleY;
iirSampleZ = (iirSampleZ * altHPAmount) + (tempSample * iirHPAmount); tempSample -= iirSampleZ; correction += iirSampleZ;
//do the IIR on a dummy sample, and store up the correction in a variable at the same scale as the very low level
//numbers being used. Don't keep doing it against the possibly high level signal number.
HeadBump -= correction;
//apply stored up tiny corrections
HeadBump *= (1.0 - (wreck/2));
bridgerectifier = fabs(HeadBump);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
bridgerectifier = sin(bridgerectifier);
if (HeadBump > 0.0) HeadBump = bridgerectifier;
else HeadBump = -bridgerectifier;
//clamp HeadBump to -1 to 1 with distortion
inputSample *= (1.0 - wreck);
inputSample += (HeadBump * wreck);
//begin 32 bit floating point dither
int expon; frexpf((float)inputSample, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSample += static_cast<int32_t>(fpd) * 5.960464655174751e-36L * pow(2,expon+62);
//end 32 bit floating point dither
*destP = inputSample;
//built in output trim and dry/wet by default
sourceP += inNumChannels; destP += inNumChannels;
}
}
