/*
* File: Melt.cpp
*
* Version: 1.0
*
* Created: 1/12/17
*
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/*=============================================================================
Melt.cpp
=============================================================================*/
#include "Melt.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Melt)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Melt::Melt
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Melt::Melt(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 );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Melt::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Melt::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Melt::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Melt::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;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Melt::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Melt::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Melt::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Melt::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Melt::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Melt::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____MeltEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Melt::MeltKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Melt::MeltKernel::Reset()
{
for(int count = 0; count < 32001; count++) {d[count] = 0;}
for(int count = 0; count < 31; count++) {minTap[count] = 0; maxTap[count] = 0; position[count] = 1; stepTap[count] = 1;}
combine = 0;
scalefactor = 0.999;
stepCount = 0;
slowCount = 0;
gcount = 0;
fpNShape = 0.0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Melt::MeltKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Melt::MeltKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 rate = 1 / (pow(GetParameter( kParam_One ),2) + 0.001);
Float64 depthB = (GetParameter( kParam_Two ) * 139.5)+2;
Float64 depthA = depthB * (1.0 - GetParameter( kParam_One ));
Float64 output = GetParameter( kParam_Three ) * 0.05;
Float64 wet = GetParameter( kParam_Four );
Float64 dry = 1.0-wet;
minTap[0] = floor(2 * depthA); maxTap[0] = floor(2 * depthB);
minTap[1] = floor(3 * depthA); maxTap[1] = floor(3 * depthB);
minTap[2] = floor(5 * depthA); maxTap[2] = floor(5 * depthB);
minTap[3] = floor(7 * depthA); maxTap[3] = floor(7 * depthB);
minTap[4] = floor(11 * depthA); maxTap[4] = floor(11 * depthB);
minTap[5] = floor(13 * depthA); maxTap[5] = floor(13 * depthB);
minTap[6] = floor(17 * depthA); maxTap[6] = floor(17 * depthB);
minTap[7] = floor(19 * depthA); maxTap[7] = floor(19 * depthB);
minTap[8] = floor(23 * depthA); maxTap[8] = floor(23 * depthB);
minTap[9] = floor(29 * depthA); maxTap[9] = floor(29 * depthB);
minTap[10] = floor(31 * depthA); maxTap[10] = floor(31 * depthB);
minTap[11] = floor(37 * depthA); maxTap[11] = floor(37 * depthB);
minTap[12] = floor(41 * depthA); maxTap[12] = floor(41 * depthB);
minTap[13] = floor(43 * depthA); maxTap[13] = floor(43 * depthB);
minTap[14] = floor(47 * depthA); maxTap[14] = floor(47 * depthB);
minTap[15] = floor(53 * depthA); maxTap[15] = floor(53 * depthB);
minTap[16] = floor(59 * depthA); maxTap[16] = floor(59 * depthB);
minTap[17] = floor(61 * depthA); maxTap[17] = floor(61 * depthB);
minTap[18] = floor(67 * depthA); maxTap[18] = floor(67 * depthB);
minTap[19] = floor(71 * depthA); maxTap[19] = floor(71 * depthB);
minTap[20] = floor(73 * depthA); maxTap[20] = floor(73 * depthB);
minTap[21] = floor(79 * depthA); maxTap[21] = floor(79 * depthB);
minTap[22] = floor(83 * depthA); maxTap[22] = floor(83 * depthB);
minTap[23] = floor(89 * depthA); maxTap[23] = floor(89 * depthB);
minTap[24] = floor(97 * depthA); maxTap[24] = floor(97 * depthB);
minTap[25] = floor(101 * depthA); maxTap[25] = floor(101 * depthB);
minTap[26] = floor(103 * depthA); maxTap[26] = floor(103 * depthB);
minTap[27] = floor(107 * depthA); maxTap[27] = floor(107 * depthB);
minTap[28] = floor(109 * depthA); maxTap[28] = floor(109 * depthB);
minTap[29] = floor(113 * depthA); maxTap[29] = floor(113 * depthB);
minTap[30] = floor(117 * depthA); maxTap[30] = floor(117 * depthB);
long double drySample;
long double inputSample;
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 > 16000) {gcount = 16000;}
d[gcount+16000] = d[gcount] = inputSample;
if (slowCount > rate || slowCount < 0) {
slowCount = 0;
stepCount++;
if (stepCount > 29 || stepCount < 0) {stepCount = 0;}
position[stepCount] += stepTap[stepCount];
if (position[stepCount] < minTap[stepCount]) {
position[stepCount] = minTap[stepCount];
stepTap[stepCount] = 1;
}
if (position[stepCount] > maxTap[stepCount]) {
position[stepCount] = maxTap[stepCount];
stepTap[stepCount] = -1;
}
}
scalefactor *= 0.9999;
scalefactor += (100.0 - fabs(combine)) * 0.000001;
combine *= scalefactor;
combine -= (d[gcount+position[29]]);
combine += (d[gcount+position[28]]);
combine *= scalefactor;
combine -= (d[gcount+position[27]]);
combine += (d[gcount+position[26]]);
combine *= scalefactor;
combine -= (d[gcount+position[25]]);
combine += (d[gcount+position[24]]);
combine *= scalefactor;
combine -= (d[gcount+position[23]]);
combine += (d[gcount+position[22]]);
combine *= scalefactor;
combine -= (d[gcount+position[21]]);
combine += (d[gcount+position[20]]);
combine *= scalefactor;
combine -= (d[gcount+position[19]]);
combine += (d[gcount+position[18]]);
combine *= scalefactor;
combine -= (d[gcount+position[17]]);
combine += (d[gcount+position[16]]);
combine *= scalefactor;
combine -= (d[gcount+position[15]]);
combine += (d[gcount+position[14]]);
combine *= scalefactor;
combine -= (d[gcount+position[13]]);
combine += (d[gcount+position[12]]);
combine *= scalefactor;
combine -= (d[gcount+position[11]]);
combine += (d[gcount+position[10]]);
combine *= scalefactor;
combine -= (d[gcount+position[9]]);
combine += (d[gcount+position[8]]);
combine *= scalefactor;
combine -= (d[gcount+position[7]]);
combine += (d[gcount+position[6]]);
combine *= scalefactor;
combine -= (d[gcount+position[5]]);
combine += (d[gcount+position[4]]);
combine *= scalefactor;
combine -= (d[gcount+position[3]]);
combine += (d[gcount+position[2]]);
combine *= scalefactor;
combine -= (d[gcount+position[1]]);
combine += (d[gcount+position[0]]);
gcount--;
slowCount++;
inputSample = combine;
if (output < 1.0) inputSample *= output;
if (wet < 1.0) inputSample = (drySample * dry)+(inputSample*wet);
//nice little output stage template: if we have another scale of floating point
//number, we really don't want to meaninglessly multiply that by 1.0.
//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;
}
}
