/*
* File: Noise.cpp
*
* Version: 1.0
*
* Created: 5/7/14
*
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/*=============================================================================
Noise.cpp
=============================================================================*/
#include "Noise.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Noise)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Noise::Noise
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Noise::Noise(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_One, kDefaultValue_ParamOne );
SetParameter(kParam_Two, kDefaultValue_ParamTwo );
SetParameter(kParam_Three, kDefaultValue_ParamThree );
SetParameter(kParam_Four, kDefaultValue_ParamFour );
SetParameter(kParam_Five, kDefaultValue_ParamFive );
SetParameter(kParam_Six, kDefaultValue_ParamSix );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Noise::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Noise::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Noise::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Noise::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;
case kParam_Two:
AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
break;
case kParam_Three:
AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamThree;
break;
case kParam_Four:
AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamFour;
break;
case kParam_Five:
AUBase::FillInParameterName (outParameterInfo, kParameterFiveName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamFive;
break;
case kParam_Six:
AUBase::FillInParameterName (outParameterInfo, kParameterSixName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamSix;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Noise::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Noise::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Noise::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Noise::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Noise::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Noise::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____NoiseEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Noise::NoiseKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Noise::NoiseKernel::Reset()
{
position = 99999999;
quadratic = 0;
noiseA = 0.0;
noiseB = 0.0;
noiseC = 0.0;
rumbleA = 0.0;
rumbleB = 0.0;
surge = 0.0;
flip = false;
filterflip = false;
for(int count = 0; count < 11; count++) {b[count] = 0.0; f[count] = 0.0;}
fpNShape = 0.0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Noise::NoiseKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Noise::NoiseKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 cutoff;
Float64 cutofftarget = (GetParameter( kParam_One )*3.5);
Float64 rumblecutoff = cutofftarget * 0.005;
Float64 invcutoff;
long double inputSample;
Float64 drySample;
Float64 highpass = GetParameter( kParam_Three )*38.0;
int lowcut = floor(highpass);
int dcut;
if (lowcut > 37) {dcut= 1151;}
if (lowcut == 37) {dcut= 1091;}
if (lowcut == 36) {dcut= 1087;}
if (lowcut == 35) {dcut= 1031;}
if (lowcut == 34) {dcut= 1013;}
if (lowcut == 33) {dcut= 971;}
if (lowcut == 32) {dcut= 907;}
if (lowcut == 31) {dcut= 839;}
if (lowcut == 30) {dcut= 797;}
if (lowcut == 29) {dcut= 733;}
if (lowcut == 28) {dcut= 719;}
if (lowcut == 27) {dcut= 673;}
if (lowcut == 26) {dcut= 613;}
if (lowcut == 25) {dcut= 593;}
if (lowcut == 24) {dcut= 541;}
if (lowcut == 23) {dcut= 479;}
if (lowcut == 22) {dcut= 431;}
if (lowcut == 21) {dcut= 419;}
if (lowcut == 20) {dcut= 373;}
if (lowcut == 19) {dcut= 311;}
if (lowcut == 18) {dcut= 293;}
if (lowcut == 17) {dcut= 233;}
if (lowcut == 16) {dcut= 191;}
if (lowcut == 15) {dcut= 173;}
if (lowcut == 14) {dcut= 131;}
if (lowcut == 13) {dcut= 113;}
if (lowcut == 12) {dcut= 71;}
if (lowcut == 11) {dcut= 53;}
if (lowcut == 10) {dcut= 31;}
if (lowcut == 9) {dcut= 27;}
if (lowcut == 8) {dcut= 23;}
if (lowcut == 7) {dcut= 19;}
if (lowcut == 6) {dcut= 17;}
if (lowcut == 5) {dcut= 13;}
if (lowcut == 4) {dcut= 11;}
if (lowcut == 3) {dcut= 7;}
if (lowcut == 2) {dcut= 5;}
if (lowcut < 2) {dcut= 3;}
highpass = GetParameter( kParam_Two ) * 22.0;
lowcut = floor(highpass)+1;
Float64 decay = 0.001 - ((1.0-pow(1.0-GetParameter( kParam_Four ),3))*0.001);
if (decay == 0.001) decay = 0.1;
Float64 wet = GetParameter( kParam_Six );
Float64 dry = 1.0 - wet;
wet *= 0.01; //correct large gain issue
Float64 correctionSample;
Float64 accumulatorSample;
Float64 overallscale = (GetParameter( kParam_Five )*9.0)+1.0;
Float64 gain = overallscale;
if (gain > 1.0) {f[0] = 1.0; gain -= 1.0;} else {f[0] = gain; gain = 0.0;}
if (gain > 1.0) {f[1] = 1.0; gain -= 1.0;} else {f[1] = gain; gain = 0.0;}
if (gain > 1.0) {f[2] = 1.0; gain -= 1.0;} else {f[2] = gain; gain = 0.0;}
if (gain > 1.0) {f[3] = 1.0; gain -= 1.0;} else {f[3] = gain; gain = 0.0;}
if (gain > 1.0) {f[4] = 1.0; gain -= 1.0;} else {f[4] = gain; gain = 0.0;}
if (gain > 1.0) {f[5] = 1.0; gain -= 1.0;} else {f[5] = gain; gain = 0.0;}
if (gain > 1.0) {f[6] = 1.0; gain -= 1.0;} else {f[6] = gain; gain = 0.0;}
if (gain > 1.0) {f[7] = 1.0; gain -= 1.0;} else {f[7] = gain; gain = 0.0;}
if (gain > 1.0) {f[8] = 1.0; gain -= 1.0;} else {f[8] = gain; gain = 0.0;}
if (gain > 1.0) {f[9] = 1.0; gain -= 1.0;} else {f[9] = gain; gain = 0.0;}
//there, now we have a neat little moving average with remainders
if (overallscale < 1.0) overallscale = 1.0;
f[0] /= overallscale;
f[1] /= overallscale;
f[2] /= overallscale;
f[3] /= overallscale;
f[4] /= overallscale;
f[5] /= overallscale;
f[6] /= overallscale;
f[7] /= overallscale;
f[8] /= overallscale;
f[9] /= overallscale;
//and now it's neatly scaled, too
while (nSampleFrames-- > 0) {
inputSample = *sourceP;
if (inputSample<1.2e-38 && -inputSample<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSample = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
drySample = inputSample;
if (surge<fabs(inputSample))
{
surge += (rand()/(double)RAND_MAX)*(fabs(inputSample)-surge);
if (surge > 1.0) surge = 1.0;
}
else
{
surge -= ((rand()/(double)RAND_MAX)*(surge-fabs(inputSample))*decay);
if (surge < 0.0) surge = 0.0;
}
cutoff = pow((cutofftarget*surge),5);
if (cutoff > 1.0) cutoff = 1.0;
invcutoff = 1.0 - cutoff;
//set up modified cutoff
flip = !flip;
filterflip = !filterflip;
quadratic -= 1;
if (quadratic < 0)
{
position += 1;
quadratic = position * position;
quadratic = quadratic % 170003; //% is C++ mod operator
quadratic *= quadratic;
quadratic = quadratic % 17011; //% is C++ mod operator
quadratic *= quadratic;
//quadratic = quadratic % 1709; //% is C++ mod operator
//quadratic *= quadratic;
quadratic = quadratic % dcut; //% is C++ mod operator
quadratic *= quadratic;
quadratic = quadratic % lowcut;
//sets density of the centering force
if (noiseA < 0) {flip = true;}
else {flip = false;}
}
if (flip) noiseA += (rand()/(double)RAND_MAX);
else noiseA -= (rand()/(double)RAND_MAX);
if (filterflip)
{
noiseB *= invcutoff; noiseB += (noiseA*cutoff);
inputSample = noiseB+noiseC;
rumbleA *= (1.0-rumblecutoff);
rumbleA += (inputSample*rumblecutoff);
}
else
{
noiseC *= invcutoff; noiseC += (noiseA*cutoff);
inputSample = noiseB+noiseC;
rumbleB *= (1.0-rumblecutoff);
rumbleB += (inputSample*rumblecutoff);
}
inputSample -= (rumbleA+rumbleB);
inputSample *= (1.0-rumblecutoff);
inputSample *= wet;
inputSample += (drySample * dry);
//apply the dry to the noise
b[9] = b[8]; b[8] = b[7]; b[7] = b[6]; b[6] = b[5];
b[5] = b[4]; b[4] = b[3]; b[3] = b[2]; b[2] = b[1];
b[1] = b[0]; b[0] = accumulatorSample = inputSample;
accumulatorSample *= f[0];
accumulatorSample += (b[1] * f[1]);
accumulatorSample += (b[2] * f[2]);
accumulatorSample += (b[3] * f[3]);
accumulatorSample += (b[4] * f[4]);
accumulatorSample += (b[5] * f[5]);
accumulatorSample += (b[6] * f[6]);
accumulatorSample += (b[7] * f[7]);
accumulatorSample += (b[8] * f[8]);
accumulatorSample += (b[9] * f[9]);
//we are doing our repetitive calculations on a separate value
correctionSample = inputSample - accumulatorSample;
//we're gonna apply the total effect of all these calculations as a single subtract
inputSample -= correctionSample;
//applying the distance calculation to both the dry AND the noise output to blend them
//32 bit dither, made small and tidy.
int expon; frexpf((Float32)inputSample, &expon);
long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
inputSample += (dither-fpNShape); fpNShape = dither;
//end 32 bit dither
*destP = inputSample;
sourceP += inNumChannels;
destP += inNumChannels;
}
}
