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airwindows/plugins/MacAU/ToTape7/ToTape7.cpp
Christopher Johnson b77a11bab5 ToTape7
2024-08-18 16:05:41 -04:00

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/*
* File: ToTape7.cpp
*
* Version: 1.0
*
* Created: 8/6/24
*
* Copyright: Copyright © 2024 Airwindows, Airwindows uses the MIT license
*
* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
* consideration of your agreement to the following terms, and your use, installation, modification
* or redistribution of this Apple software constitutes acceptance of these terms. If you do
* not agree with these terms, please do not use, install, modify or redistribute this Apple
* software.
*
* In consideration of your agreement to abide by the following terms, and subject to these terms,
* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this
* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the
* Apple Software, with or without modifications, in source and/or binary forms; provided that if you
* redistribute the Apple Software in its entirety and without modifications, you must retain this
* notice and the following text and disclaimers in all such redistributions of the Apple Software.
* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to
* endorse or promote products derived from the Apple Software without specific prior written
* permission from Apple. Except as expressly stated in this notice, no other rights or
* licenses, express or implied, are granted by Apple herein, including but not limited to any
* patent rights that may be infringed by your derivative works or by other works in which the
* Apple Software may be incorporated.
*
* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
* IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
* OR IN COMBINATION WITH YOUR PRODUCTS.
*
* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
* REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
* UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
* IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*=============================================================================
ToTape7.cpp
=============================================================================*/
#include "ToTape7.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(ToTape7)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ToTape7::ToTape7
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ToTape7::ToTape7(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_A, kDefaultValue_ParamA );
SetParameter(kParam_B, kDefaultValue_ParamB );
SetParameter(kParam_C, kDefaultValue_ParamC );
SetParameter(kParam_D, kDefaultValue_ParamD );
SetParameter(kParam_E, kDefaultValue_ParamE );
SetParameter(kParam_F, kDefaultValue_ParamF );
SetParameter(kParam_G, kDefaultValue_ParamG );
SetParameter(kParam_H, kDefaultValue_ParamH );
SetParameter(kParam_I, kDefaultValue_ParamI );
SetParameter(kParam_J, kDefaultValue_ParamJ );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ToTape7::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ToTape7::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ToTape7::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ToTape7::GetParameterInfo(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
ComponentResult result = noErr;
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
| kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global) {
switch(inParameterID)
{
case kParam_A:
AUBase::FillInParameterName (outParameterInfo, kParameterAName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamA;
break;
case kParam_B:
AUBase::FillInParameterName (outParameterInfo, kParameterBName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamB;
break;
case kParam_C:
AUBase::FillInParameterName (outParameterInfo, kParameterCName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamC;
break;
case kParam_D:
AUBase::FillInParameterName (outParameterInfo, kParameterDName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamD;
break;
case kParam_E:
AUBase::FillInParameterName (outParameterInfo, kParameterEName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamE;
break;
case kParam_F:
AUBase::FillInParameterName (outParameterInfo, kParameterFName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamF;
break;
case kParam_G:
AUBase::FillInParameterName (outParameterInfo, kParameterGName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamG;
break;
case kParam_H:
AUBase::FillInParameterName (outParameterInfo, kParameterHName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_CustomUnit;
outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
outParameterInfo.unitName = kParameterHUnit;
outParameterInfo.minValue = 25.0;
outParameterInfo.maxValue = 200.0;
outParameterInfo.defaultValue = kDefaultValue_ParamH;
break;
case kParam_I:
AUBase::FillInParameterName (outParameterInfo, kParameterIName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamI;
break;
case kParam_J:
AUBase::FillInParameterName (outParameterInfo, kParameterJName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamJ;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ToTape7::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ToTape7::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// state that plugin supports only stereo-in/stereo-out processing
UInt32 ToTape7::SupportedNumChannels(const AUChannelInfo ** outInfo)
{
if (outInfo != NULL)
{
static AUChannelInfo info;
info.inChannels = 2;
info.outChannels = 2;
*outInfo = &info;
}
return 1;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ToTape7::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ToTape7::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// ToTape7::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ToTape7::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____ToTape7EffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ToTape7::ToTape7Kernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ToTape7::Reset(AudioUnitScope inScope, AudioUnitElement inElement)
{
iirEncL = 0.0;
iirEncR = 0.0;
for (int temp = 0; temp < 1001; temp++) {dL[temp] = 0.0;dR[temp] = 0.0;}
sweepL = M_PI;
sweepR = M_PI;
nextmaxL = 0.5;
nextmaxR = 0.5;
gcount = 0;
for (int x = 0; x < gslew_total; x++) gslew[x] = 0.0;
iirMidRollerL = 0.0;
iirLowCutoffL = 0.0;
iirMidRollerR = 0.0;
iirLowCutoffR = 0.0;
headBumpL = 0.0;
headBumpR = 0.0;
for (int x = 0; x < hdb_total; x++) {hdbA[x] = 0.0;hdbB[x] = 0.0;}
//from ZBandpass, so I can use enums with it
iirDecL = 0.0;
iirDecR = 0.0;
lastSampleL = 0.0;
wasPosClipL = false;
wasNegClipL = false;
lastSampleR = 0.0;
wasPosClipR = false;
wasNegClipR = false;
for (int x = 0; x < 16; x++) {intermediateL[x] = 0.0; intermediateR[x] = 0.0;}
//this is reset: values being initialized only once. Startup values, whatever they are.
fpdL = 1.0; while (fpdL < 16386) fpdL = rand()*UINT32_MAX;
fpdR = 1.0; while (fpdR < 16386) fpdR = rand()*UINT32_MAX;
return noErr;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ToTape7::ProcessBufferLists
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
OSStatus ToTape7::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags,
const AudioBufferList & inBuffer,
AudioBufferList & outBuffer,
UInt32 inFramesToProcess)
{
Float32 * inputL = (Float32*)(inBuffer.mBuffers[0].mData);
Float32 * inputR = (Float32*)(inBuffer.mBuffers[1].mData);
Float32 * outputL = (Float32*)(outBuffer.mBuffers[0].mData);
Float32 * outputR = (Float32*)(outBuffer.mBuffers[1].mData);
UInt32 nSampleFrames = inFramesToProcess;
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= GetSampleRate();
int spacing = floor(overallscale); //should give us working basic scaling, usually 2 or 4
if (spacing < 1) spacing = 1; if (spacing > 16) spacing = 16;
double dublyAmount = pow(GetParameter( kParam_A ),3)*0.105468;
double iirEncFreq = GetParameter( kParam_B )/overallscale;
double iirMidFreq = ((GetParameter( kParam_B ) * 0.618) + 0.382)/overallscale;
double inputGain = pow(GetParameter( kParam_C )*2.0,2.0);
double flutDepth = pow(GetParameter( kParam_D ),6)*overallscale*50;
if (flutDepth > 498.0) flutDepth = 498.0;
double flutFrequency = (0.02*pow(GetParameter( kParam_E ),3))/overallscale;
double bias = (GetParameter( kParam_F )*2.0)-1.0;
double underBias = (pow(bias,4)*0.25)/overallscale;
double overBias = pow(1.0-bias,3)/overallscale;
if (bias > 0.0) underBias = 0.0;
if (bias < 0.0) overBias = 1.0/overallscale;
gslew[threshold9] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold8] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold7] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold6] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold5] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold4] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold3] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold2] = overBias;
overBias *= 1.618033988749894848204586;
gslew[threshold1] = overBias;
overBias *= 1.618033988749894848204586;
double headBumpDrive = (GetParameter( kParam_G )*0.1)/overallscale;
double headBumpMix = GetParameter( kParam_G )*0.5;
hdbA[hdb_freq] = GetParameter( kParam_H )/GetSampleRate();
hdbB[hdb_freq] = hdbA[hdb_freq]*0.9375;
hdbB[hdb_reso] = hdbA[hdb_reso] = 0.618033988749894848204586;
hdbB[hdb_a1] = hdbA[hdb_a1] = 0.0;
double K = tan(M_PI * hdbA[hdb_freq]);
double norm = 1.0 / (1.0 + K / hdbA[hdb_reso] + K * K);
hdbA[hdb_a0] = K / hdbA[hdb_reso] * norm;
hdbA[hdb_a2] = -hdbA[hdb_a0];
hdbA[hdb_b1] = 2.0 * (K * K - 1.0) * norm;
hdbA[hdb_b2] = (1.0 - K / hdbA[hdb_reso] + K * K) * norm;
K = tan(M_PI * hdbB[hdb_freq]);
norm = 1.0 / (1.0 + K / hdbB[hdb_reso] + K * K);
hdbB[hdb_a0] = K / hdbB[hdb_reso] * norm;
hdbB[hdb_a2] = -hdbB[hdb_a0];
hdbB[hdb_b1] = 2.0 * (K * K - 1.0) * norm;
hdbB[hdb_b2] = (1.0 - K / hdbB[hdb_reso] + K * K) * norm;
double outlyAmount = pow(GetParameter( kParam_I ),3)*0.109744;
double iirDecFreq = GetParameter( kParam_J )/overallscale;
double subCurve = sin(GetParameter( kParam_G )*M_PI);
double iirSubFreq = (subCurve*0.008)/overallscale;
while (nSampleFrames-- > 0) {
double inputSampleL = *inputL;
double inputSampleR = *inputR;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
//begin Dubly encode
double doubly = 0.0;
if (dublyAmount > 0.0) {
iirEncL = (iirEncL * (1.0 - iirEncFreq)) + (inputSampleL * iirEncFreq);
double doubly = inputSampleL - iirEncL;
if (doubly > 1.0) doubly = 1.0; if (doubly < -1.0) doubly = -1.0;
if (doubly > 0) doubly = log(1.0+(255*fabs(doubly)))/2.40823996531;
if (doubly < 0) doubly = -log(1.0+(255*fabs(doubly)))/2.40823996531;
inputSampleL += doubly*dublyAmount;
iirEncR = (iirEncR * (1.0 - iirEncFreq)) + (inputSampleR * iirEncFreq);
doubly = inputSampleR - iirEncR;
if (doubly > 1.0) doubly = 1.0; if (doubly < -1.0) doubly = -1.0;
if (doubly > 0) doubly = log(1.0+(255*fabs(doubly)))/2.40823996531;
if (doubly < 0) doubly = -log(1.0+(255*fabs(doubly)))/2.40823996531;
inputSampleR += doubly*dublyAmount;
}
//end Dubly encode
if (inputGain != 1.0) {
inputSampleL *= inputGain;
inputSampleR *= inputGain;
}
//begin Flutter
if (flutDepth > 0.0) {
if (gcount < 0 || gcount > 999) gcount = 999;
dL[gcount] = inputSampleL;
int count = gcount;
double offset = flutDepth + (flutDepth * sin(sweepL));
sweepL += nextmaxL * flutFrequency;
if (sweepL > (M_PI*2.0)) {
sweepL -= M_PI*2.0;
double flutA = 0.24 + (fpdL / (double)UINT32_MAX * 0.74);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
double flutB = 0.24 + (fpdL / (double)UINT32_MAX * 0.74);
if (fabs(flutA-sin(sweepR+nextmaxR))<fabs(flutB-sin(sweepR+nextmaxR))) nextmaxL = flutA; else nextmaxL = flutB;
}
count += (int)floor(offset);
inputSampleL = (dL[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
inputSampleL += (dL[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
dR[gcount] = inputSampleR;
count = gcount;
offset = flutDepth + (flutDepth * sin(sweepR));
sweepR += nextmaxR * flutFrequency;
if (sweepR > (M_PI*2.0)) {
sweepR -= M_PI*2.0;
double flutA = 0.24 + (fpdR / (double)UINT32_MAX * 0.74);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
double flutB = 0.24 + (fpdR / (double)UINT32_MAX * 0.74);
if (fabs(flutA-sin(sweepL+nextmaxL))<fabs(flutB-sin(sweepL+nextmaxL))) nextmaxR = flutA; else nextmaxR = flutB;
}
count += (int)floor(offset);
inputSampleR = (dR[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
inputSampleR += (dR[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
gcount--;
}
//end Flutter
//start bias routine
if (fabs(bias) > 0.001) {
for (int x = 0; x < gslew_total; x += 3) {
if (underBias > 0.0) {
double stuck = fabs(inputSampleL - (gslew[x]/0.975)) / underBias;
if (stuck < 1.0) inputSampleL = (inputSampleL * stuck) + ((gslew[x]/0.975)*(1.0-stuck));
stuck = fabs(inputSampleR - (gslew[x+1]/0.975)) / underBias;
if (stuck < 1.0) inputSampleR = (inputSampleR * stuck) + ((gslew[x+1]/0.975)*(1.0-stuck));
}
if ((inputSampleL - gslew[x]) > gslew[x+2]) inputSampleL = gslew[x] + gslew[x+2];
if (-(inputSampleL - gslew[x]) > gslew[x+2]) inputSampleL = gslew[x] - gslew[x+2];
gslew[x] = inputSampleL * 0.975;
if ((inputSampleR - gslew[x+1]) > gslew[x+2]) inputSampleR = gslew[x+1] + gslew[x+2];
if (-(inputSampleR - gslew[x+1]) > gslew[x+2]) inputSampleR = gslew[x+1] - gslew[x+2];
gslew[x+1] = inputSampleR * 0.975;
}
}
//end bias routine
//toTape basic algorithm L
iirMidRollerL = (iirMidRollerL * (1.0-iirMidFreq)) + (inputSampleL*iirMidFreq);
double HighsSampleL = inputSampleL - iirMidRollerL;
double LowsSampleL = iirMidRollerL;
if (iirSubFreq > 0.0) {
iirLowCutoffL = (iirLowCutoffL * (1.0-iirSubFreq)) + (LowsSampleL*iirSubFreq);
LowsSampleL -= iirLowCutoffL;
}
if (LowsSampleL > 1.57079633) LowsSampleL = 1.57079633;
if (LowsSampleL < -1.57079633) LowsSampleL = -1.57079633;
LowsSampleL = sin(LowsSampleL);
double thinnedHighSample = fabs(HighsSampleL)*1.57079633;
if (thinnedHighSample > 1.57079633) thinnedHighSample = 1.57079633;
thinnedHighSample = 1.0-cos(thinnedHighSample);
if (HighsSampleL < 0) thinnedHighSample = -thinnedHighSample;
HighsSampleL -= thinnedHighSample;
//toTape basic algorithm R
iirMidRollerR = (iirMidRollerR * (1.0-iirMidFreq)) + (inputSampleR*iirMidFreq);
double HighsSampleR = inputSampleR - iirMidRollerR;
double LowsSampleR = iirMidRollerR;
if (iirSubFreq > 0.0) {
iirLowCutoffR = (iirLowCutoffR * (1.0-iirSubFreq)) + (LowsSampleR*iirSubFreq);
LowsSampleR -= iirLowCutoffR;
}
if (LowsSampleR > 1.57079633) LowsSampleR = 1.57079633;
if (LowsSampleR < -1.57079633) LowsSampleR = -1.57079633;
LowsSampleR = sin(LowsSampleR);
thinnedHighSample = fabs(HighsSampleR)*1.57079633;
if (thinnedHighSample > 1.57079633) thinnedHighSample = 1.57079633;
thinnedHighSample = 1.0-cos(thinnedHighSample);
if (HighsSampleR < 0) thinnedHighSample = -thinnedHighSample;
HighsSampleR -= thinnedHighSample;
//begin HeadBump
double headBumpSampleL = 0.0;
double headBumpSampleR = 0.0;
if (headBumpMix > 0.0) {
headBumpL += (LowsSampleL * headBumpDrive);
headBumpL -= (headBumpL * headBumpL * headBumpL * (0.0618/sqrt(overallscale)));
headBumpR += (LowsSampleR * headBumpDrive);
headBumpR -= (headBumpR * headBumpR * headBumpR * (0.0618/sqrt(overallscale)));
double headBiqSampleL = (headBumpL * hdbA[hdb_a0]) + hdbA[hdb_sL1];
hdbA[hdb_sL1] = (headBumpL * hdbA[hdb_a1]) - (headBiqSampleL * hdbA[hdb_b1]) + hdbA[hdb_sL2];
hdbA[hdb_sL2] = (headBumpL * hdbA[hdb_a2]) - (headBiqSampleL * hdbA[hdb_b2]);
headBumpSampleL = (headBiqSampleL * hdbB[hdb_a0]) + hdbB[hdb_sL1];
hdbB[hdb_sL1] = (headBiqSampleL * hdbB[hdb_a1]) - (headBumpSampleL * hdbB[hdb_b1]) + hdbB[hdb_sL2];
hdbB[hdb_sL2] = (headBiqSampleL * hdbB[hdb_a2]) - (headBumpSampleL * hdbB[hdb_b2]);
double headBiqSampleR = (headBumpR * hdbA[hdb_a0]) + hdbA[hdb_sR1];
hdbA[hdb_sR1] = (headBumpR * hdbA[hdb_a1]) - (headBiqSampleR * hdbA[hdb_b1]) + hdbA[hdb_sR2];
hdbA[hdb_sR2] = (headBumpR * hdbA[hdb_a2]) - (headBiqSampleR * hdbA[hdb_b2]);
headBumpSampleR = (headBiqSampleR * hdbB[hdb_a0]) + hdbB[hdb_sR1];
hdbB[hdb_sR1] = (headBiqSampleR * hdbB[hdb_a1]) - (headBumpSampleR * hdbB[hdb_b1]) + hdbB[hdb_sR2];
hdbB[hdb_sR2] = (headBiqSampleR * hdbB[hdb_a2]) - (headBumpSampleR * hdbB[hdb_b2]);
}
//end HeadBump
inputSampleL = LowsSampleL + HighsSampleL + (headBumpSampleL * headBumpMix);
inputSampleR = LowsSampleR + HighsSampleR + (headBumpSampleR * headBumpMix);
//begin Dubly decode
if (outlyAmount > 0.0) {
iirDecL = (iirDecL * (1.0 - iirDecFreq)) + (inputSampleL * iirDecFreq);
doubly = inputSampleL - iirDecL;
if (doubly > 1.0) doubly = 1.0; if (doubly < -1.0) doubly = -1.0;
if (doubly > 0) doubly = log(1.0+(255*fabs(doubly)))/2.40823996531;
if (doubly < 0) doubly = -log(1.0+(255*fabs(doubly)))/2.40823996531;
inputSampleL -= doubly*outlyAmount;
iirDecR = (iirDecR * (1.0 - iirDecFreq)) + (inputSampleR * iirDecFreq);
doubly = inputSampleR - iirDecR;
if (doubly > 1.0) doubly = 1.0; if (doubly < -1.0) doubly = -1.0;
if (doubly > 0) doubly = log(1.0+(255*fabs(doubly)))/2.40823996531;
if (doubly < 0) doubly = -log(1.0+(255*fabs(doubly)))/2.40823996531;
inputSampleR -= doubly*outlyAmount;
}
//end Dubly decode
//begin ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
if (inputSampleL > 4.0) inputSampleL = 4.0; if (inputSampleL < -4.0) inputSampleL = -4.0;
if (wasPosClipL == true) { //current will be over
if (inputSampleL<lastSampleL) lastSampleL=0.7058208+(inputSampleL*0.2609148);
else lastSampleL = 0.2491717+(lastSampleL*0.7390851);
} wasPosClipL = false;
if (inputSampleL>0.9549925859) {wasPosClipL=true;inputSampleL=0.7058208+(lastSampleL*0.2609148);}
if (wasNegClipL == true) { //current will be -over
if (inputSampleL > lastSampleL) lastSampleL=-0.7058208+(inputSampleL*0.2609148);
else lastSampleL=-0.2491717+(lastSampleL*0.7390851);
} wasNegClipL = false;
if (inputSampleL<-0.9549925859) {wasNegClipL=true;inputSampleL=-0.7058208+(lastSampleL*0.2609148);}
intermediateL[spacing] = inputSampleL;
inputSampleL = lastSampleL; //Latency is however many samples equals one 44.1k sample
for (int x = spacing; x > 0; x--) intermediateL[x-1] = intermediateL[x];
lastSampleL = intermediateL[0]; //run a little buffer to handle this
if (inputSampleR > 4.0) inputSampleR = 4.0; if (inputSampleR < -4.0) inputSampleR = -4.0;
if (wasPosClipR == true) { //current will be over
if (inputSampleR<lastSampleR) lastSampleR=0.7058208+(inputSampleR*0.2609148);
else lastSampleR = 0.2491717+(lastSampleR*0.7390851);
} wasPosClipR = false;
if (inputSampleR>0.9549925859) {wasPosClipR=true;inputSampleR=0.7058208+(lastSampleR*0.2609148);}
if (wasNegClipR == true) { //current will be -over
if (inputSampleR > lastSampleR) lastSampleR=-0.7058208+(inputSampleR*0.2609148);
else lastSampleR=-0.2491717+(lastSampleR*0.7390851);
} wasNegClipR = false;
if (inputSampleR<-0.9549925859) {wasNegClipR=true;inputSampleR=-0.7058208+(lastSampleR*0.2609148);}
intermediateR[spacing] = inputSampleR;
inputSampleR = lastSampleR; //Latency is however many samples equals one 44.1k sample
for (int x = spacing; x > 0; x--) intermediateR[x-1] = intermediateR[x];
lastSampleR = intermediateR[0]; //run a little buffer to handle this
//end ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit stereo floating point dither
*outputL = inputSampleL;
*outputR = inputSampleR;
//direct stereo out
inputL += 1;
inputR += 1;
outputL += 1;
outputR += 1;
}
return noErr;
}
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