/*
* File: TubeDesk.cpp
*
* Version: 1.0
*
* Created: 10/1/10
*
* Copyright: Copyright � 2010 Airwindows, All Rights Reserved
*
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*/
/*=============================================================================
TubeDesk.h
=============================================================================*/
#include "TubeDesk.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(TubeDesk)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::TubeDesk
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TubeDesk::TubeDesk(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult TubeDesk::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult TubeDesk::GetParameterInfo(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
ComponentResult result = noErr;
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
| kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global) {
switch(inParameterID)
{
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult TubeDesk::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult TubeDesk::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult TubeDesk::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____TubeDeskEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::TubeDeskKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void TubeDesk::TubeDeskKernel::Reset()
{
int count;
for(count = 0; count < 4999; count++) {d[count] = 0;}
control = 0;
gcount = 0;
lastSample = 0.0;
lastOutSample = 0.0;
lastSlew = 0.0;
fpNShape = 0.0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// TubeDesk::TubeDeskKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void TubeDesk::TubeDeskKernel::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 intensity = 0.4384938;
Float64 depthA = 549.0;
int offsetA = (int)(depthA * overallscale);
if (offsetA < 1) offsetA = 1;
if (offsetA > 2440) offsetA = 2440;
Float64 clamp;
Float64 thickness;
Float64 out;
Float64 gain = 0.5;
Float64 slewgain = 0.128;
Float64 prevslew = 0.105;
Float64 balanceB = 0.0001;
slewgain *= overallscale;
prevslew *= overallscale;
balanceB /= overallscale;
Float64 balanceA = 1.0 - balanceB;
Float64 slew;
Float64 bridgerectifier;
Float64 combSample;
long double inputSample;
long double drySample;
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 (gcount < 0 || gcount > 2450) {gcount = 2450;}
d[gcount+2450] = d[gcount] = fabs(inputSample)*intensity;
control += (d[gcount] / offsetA);
control -= (d[gcount+offsetA] / offsetA);
control -= 0.000001;
clamp = 1;
if (control < 0) {control = 0;}
if (control > 1) {clamp -= (control - 1); control = 1;}
if (clamp < 0.5) {clamp = 0.5;}
gcount--;
//control = 0 to 1
thickness = ((1.0 - control) * 2.0) - 1.0;
out = fabs(thickness);
bridgerectifier = fabs(inputSample);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (thickness > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (inputSample > 0) inputSample = (inputSample*(1-out))+(bridgerectifier*out);
else inputSample = (inputSample*(1-out))-(bridgerectifier*out);
//blend according to density control
inputSample *= clamp;
slew = inputSample - lastSample;
lastSample = inputSample;
//Set up direct reference for slew
bridgerectifier = fabs(slew*slewgain);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (slew > 0) slew = bridgerectifier/slewgain;
else slew = -(bridgerectifier/slewgain);
inputSample = (lastOutSample*balanceA) + (lastSample*balanceB) + slew;
//go from last slewed, but include some raw values
lastOutSample = inputSample;
//Set up slewed reference
combSample = fabs(drySample*lastSample);
if (combSample > 1.0) combSample = 1.0;
//bailout for very high input gains
inputSample -= (lastSlew * combSample * prevslew);
lastSlew = slew;
//slew interaction with previous slew
inputSample *= gain;
bridgerectifier = fabs(inputSample);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (inputSample > 0) inputSample = bridgerectifier;
else inputSample = -bridgerectifier;
//drive section
inputSample /= gain;
//end of Desk section
//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;
}
}
