mirror of
https://github.com/airwindows/airwindows.git
synced 2026-05-21 06:46:21 -06:00
238 lines
10 KiB
C++
Executable file
238 lines
10 KiB
C++
Executable file
/*
|
|
* File: TapeBias.cpp
|
|
*
|
|
* Version: 1.0
|
|
*
|
|
* Created: 7/25/24
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
/*=============================================================================
|
|
TapeBias.cpp
|
|
|
|
=============================================================================*/
|
|
#include "TapeBias.h"
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
AUDIOCOMPONENT_ENTRY(AUBaseFactory, TapeBias)
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// TapeBias::TapeBias
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
TapeBias::TapeBias(AudioUnit component)
|
|
: AUEffectBase(component)
|
|
{
|
|
CreateElements();
|
|
Globals()->UseIndexedParameters(kNumberOfParameters);
|
|
SetParameter(kParam_A, kDefaultValue_ParamA );
|
|
|
|
#if AU_DEBUG_DISPATCHER
|
|
mDebugDispatcher = new AUDebugDispatcher (this);
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// TapeBias::GetParameterValueStrings
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult TapeBias::GetParameterValueStrings(AudioUnitScope inScope,
|
|
AudioUnitParameterID inParameterID,
|
|
CFArrayRef * outStrings)
|
|
{
|
|
|
|
return kAudioUnitErr_InvalidProperty;
|
|
}
|
|
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// TapeBias::GetParameterInfo
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult TapeBias::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;
|
|
default:
|
|
result = kAudioUnitErr_InvalidParameter;
|
|
break;
|
|
}
|
|
} else {
|
|
result = kAudioUnitErr_InvalidParameter;
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// TapeBias::GetPropertyInfo
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult TapeBias::GetPropertyInfo (AudioUnitPropertyID inID,
|
|
AudioUnitScope inScope,
|
|
AudioUnitElement inElement,
|
|
UInt32 & outDataSize,
|
|
Boolean & outWritable)
|
|
{
|
|
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// TapeBias::GetProperty
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult TapeBias::GetProperty( AudioUnitPropertyID inID,
|
|
AudioUnitScope inScope,
|
|
AudioUnitElement inElement,
|
|
void * outData )
|
|
{
|
|
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
|
|
}
|
|
|
|
// TapeBias::Initialize
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult TapeBias::Initialize()
|
|
{
|
|
ComponentResult result = AUEffectBase::Initialize();
|
|
if (result == noErr)
|
|
Reset(kAudioUnitScope_Global, 0);
|
|
return result;
|
|
}
|
|
|
|
#pragma mark ____TapeBiasEffectKernel
|
|
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// TapeBias::TapeBiasKernel::Reset()
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
void TapeBias::TapeBiasKernel::Reset()
|
|
{
|
|
for (int x = 0; x < gslew_total; x++) gslew[x] = 0.0;
|
|
fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// TapeBias::TapeBiasKernel::Process
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
void TapeBias::TapeBiasKernel::Process( const Float32 *inSourceP,
|
|
Float32 *inDestP,
|
|
UInt32 inFramesToProcess,
|
|
UInt32 inNumChannels,
|
|
bool &ioSilence )
|
|
{
|
|
UInt32 nSampleFrames = inFramesToProcess;
|
|
const Float32 *sourceP = inSourceP;
|
|
Float32 *destP = inDestP;
|
|
double overallscale = 1.0;
|
|
overallscale /= 44100.0;
|
|
overallscale *= GetSampleRate();
|
|
|
|
double bias = (GetParameter( kParam_A )*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;
|
|
|
|
while (nSampleFrames-- > 0) {
|
|
double inputSample = *sourceP;
|
|
if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
|
|
|
|
//start bias routine
|
|
for (int x = 0; x < gslew_total; x += 3) {
|
|
if (underBias > 0.0) {
|
|
double stuck = fabs(inputSample - (gslew[x]/0.975)) / underBias;
|
|
if (stuck < 1.0) inputSample = (inputSample * 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 ((inputSample - gslew[x]) > gslew[x+2]) inputSample = gslew[x] + gslew[x+2];
|
|
if (-(inputSample - gslew[x]) > gslew[x+2]) inputSample = gslew[x] - gslew[x+2];
|
|
gslew[x] = inputSample * 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 * 0.95;
|
|
}
|
|
//end bias routine
|
|
|
|
//begin 32 bit floating point dither
|
|
int expon; frexpf((float)inputSample, &expon);
|
|
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
|
|
inputSample += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
|
|
//end 32 bit floating point dither
|
|
|
|
*destP = inputSample;
|
|
|
|
sourceP += inNumChannels; destP += inNumChannels;
|
|
}
|
|
}
|
|
|