mirror of
https://github.com/airwindows/airwindows.git
synced 2026-05-15 14:16:00 -06:00
312 lines
14 KiB
C++
312 lines
14 KiB
C++
/*
|
|
* File: XLowpass.cpp
|
|
*
|
|
* Version: 1.0
|
|
*
|
|
* Created: 5/1/21
|
|
*
|
|
* Copyright: Copyright © 2021 Airwindows, All Rights Reserved
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
/*=============================================================================
|
|
XLowpass.cpp
|
|
|
|
=============================================================================*/
|
|
#include "XLowpass.h"
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
AUDIOCOMPONENT_ENTRY(AUBaseFactory, XLowpass)
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// XLowpass::XLowpass
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
XLowpass::XLowpass(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
|
|
|
|
}
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// XLowpass::GetParameterValueStrings
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult XLowpass::GetParameterValueStrings(AudioUnitScope inScope,
|
|
AudioUnitParameterID inParameterID,
|
|
CFArrayRef * outStrings)
|
|
{
|
|
|
|
return kAudioUnitErr_InvalidProperty;
|
|
}
|
|
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// XLowpass::GetParameterInfo
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult XLowpass::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;
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// XLowpass::GetPropertyInfo
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult XLowpass::GetPropertyInfo (AudioUnitPropertyID inID,
|
|
AudioUnitScope inScope,
|
|
AudioUnitElement inElement,
|
|
UInt32 & outDataSize,
|
|
Boolean & outWritable)
|
|
{
|
|
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// XLowpass::GetProperty
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult XLowpass::GetProperty( AudioUnitPropertyID inID,
|
|
AudioUnitScope inScope,
|
|
AudioUnitElement inElement,
|
|
void * outData )
|
|
{
|
|
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
|
|
}
|
|
|
|
// XLowpass::Initialize
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult XLowpass::Initialize()
|
|
{
|
|
ComponentResult result = AUEffectBase::Initialize();
|
|
if (result == noErr)
|
|
Reset(kAudioUnitScope_Global, 0);
|
|
return result;
|
|
}
|
|
|
|
#pragma mark ____XLowpassEffectKernel
|
|
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// XLowpass::XLowpassKernel::Reset()
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
void XLowpass::XLowpassKernel::Reset()
|
|
{
|
|
for (int x = 0; x < 11; x++) {biquad[x] = 0.0; biquadA[x] = 0.0; biquadB[x] = 0.0; biquadC[x] = 0.0; biquadD[x] = 0.0;}
|
|
fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// XLowpass::XLowpassKernel::Process
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
void XLowpass::XLowpassKernel::Process( const Float32 *inSourceP,
|
|
Float32 *inDestP,
|
|
UInt32 inFramesToProcess,
|
|
UInt32 inNumChannels,
|
|
bool &ioSilence )
|
|
{
|
|
UInt32 nSampleFrames = inFramesToProcess;
|
|
const Float32 *sourceP = inSourceP;
|
|
Float32 *destP = inDestP;
|
|
|
|
Float64 gain = pow(GetParameter( kParam_One )+0.5,4);
|
|
biquadA[0] = (pow(GetParameter( kParam_Two ),2)*20000.0)/GetSampleRate();
|
|
if (biquadA[0] < 0.001) biquadA[0] = 0.001;
|
|
|
|
Float64 compensation = sqrt(biquadA[0])*6.4;
|
|
|
|
Float64 clipFactor = 1.0+(biquadA[0]*biquadA[0]*GetParameter( kParam_Three )*32.0);
|
|
|
|
double K = tan(M_PI * biquadA[0]);
|
|
double norm = 1.0 / (1.0 + K / 0.7071 + K * K);
|
|
biquadA[2] = K * K * norm;
|
|
biquadA[3] = 2.0 * biquadA[2];
|
|
biquadA[4] = biquadA[2];
|
|
biquadA[5] = 2.0 * (K * K - 1.0) * norm;
|
|
biquadA[6] = (1.0 - K / 0.7071 + K * K) * norm;
|
|
|
|
for (int x = 0; x < 7; x++) {biquad[x] = biquadD[x] = biquadC[x] = biquadB[x] = biquadA[x];}
|
|
|
|
Float64 aWet = 1.0;
|
|
Float64 bWet = 1.0;
|
|
Float64 cWet = 1.0;
|
|
Float64 dWet = GetParameter( kParam_Three )*4.0;
|
|
Float64 wet = GetParameter( kParam_Four );
|
|
|
|
//four-stage wet/dry control using progressive stages that bypass when not engaged
|
|
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
|
|
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
|
|
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
|
|
else {dWet -= 3.0;}
|
|
//this is one way to make a little set of dry/wet stages that are successively added to the
|
|
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
|
|
//beyond that point: this is a way to progressively add a 'black box' sound processing
|
|
//which lets you fall through to simpler processing at lower settings.
|
|
long double outSample = 0.0;
|
|
|
|
while (nSampleFrames-- > 0) {
|
|
long double inputSample = *sourceP;
|
|
if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37;
|
|
long double drySample = inputSample;
|
|
|
|
if (gain != 1.0) {
|
|
inputSample *= gain;
|
|
}
|
|
|
|
long double nukeLevel = inputSample;
|
|
|
|
outSample = biquad[2]*inputSample+biquad[3]*biquad[7]+biquad[4]*biquad[8]-biquad[5]*biquad[9]-biquad[6]*biquad[10];
|
|
biquad[8] = biquad[7]; biquad[7] = inputSample; biquad[10] = biquad[9];
|
|
outSample *= clipFactor;
|
|
if (outSample > 1.57079633) outSample = 1.57079633;
|
|
if (outSample < -1.57079633) outSample = -1.57079633;
|
|
biquad[9] = sin(outSample); //DF1
|
|
inputSample = outSample / compensation; nukeLevel = inputSample;
|
|
|
|
if (aWet > 0.0) {
|
|
outSample = biquadA[2]*inputSample+biquadA[3]*biquadA[7]+biquadA[4]*biquadA[8]-biquadA[5]*biquadA[9]-biquadA[6]*biquadA[10];
|
|
biquadA[8] = biquadA[7]; biquadA[7] = inputSample; biquadA[10] = biquadA[9];
|
|
outSample *= clipFactor;
|
|
if (outSample > 1.57079633) outSample = 1.57079633;
|
|
if (outSample < -1.57079633) outSample = -1.57079633;
|
|
biquadA[9] = sin(outSample); //DF1
|
|
inputSample = outSample / compensation; inputSample = (inputSample * aWet) + (nukeLevel * (1.0-aWet));
|
|
nukeLevel = inputSample;
|
|
}
|
|
if (bWet > 0.0) {
|
|
outSample = biquadB[2]*inputSample+biquadB[3]*biquadB[7]+biquadB[4]*biquadB[8]-biquadB[5]*biquadB[9]-biquadB[6]*biquadB[10];
|
|
biquadB[8] = biquadB[7]; biquadB[7] = inputSample; biquadB[10] = biquadB[9];
|
|
outSample *= clipFactor;
|
|
if (outSample > 1.57079633) outSample = 1.57079633;
|
|
if (outSample < -1.57079633) outSample = -1.57079633;
|
|
biquadB[9] = sin(outSample); //DF1
|
|
inputSample = outSample / compensation; inputSample = (inputSample * bWet) + (nukeLevel * (1.0-bWet));
|
|
nukeLevel = inputSample;
|
|
}
|
|
if (cWet > 0.0) {
|
|
outSample = biquadC[2]*inputSample+biquadC[3]*biquadC[7]+biquadC[4]*biquadC[8]-biquadC[5]*biquadC[9]-biquadC[6]*biquadC[10];
|
|
biquadC[8] = biquadC[7]; biquadC[7] = inputSample; biquadC[10] = biquadC[9];
|
|
outSample *= clipFactor;
|
|
if (outSample > 1.57079633) outSample = 1.57079633;
|
|
if (outSample < -1.57079633) outSample = -1.57079633;
|
|
biquadC[9] = sin(outSample); //DF1
|
|
inputSample = outSample / compensation; inputSample = (inputSample * cWet) + (nukeLevel * (1.0-cWet));
|
|
nukeLevel = inputSample;
|
|
}
|
|
if (dWet > 0.0) {
|
|
outSample = biquadD[2]*inputSample+biquadD[3]*biquadD[7]+biquadD[4]*biquadD[8]-biquadD[5]*biquadD[9]-biquadD[6]*biquadD[10];
|
|
biquadD[8] = biquadD[7]; biquadD[7] = inputSample; biquadD[10] = biquadD[9];
|
|
outSample *= clipFactor;
|
|
if (outSample > 1.57079633) outSample = 1.57079633;
|
|
if (outSample < -1.57079633) outSample = -1.57079633;
|
|
biquadD[9] = sin(outSample); //DF1
|
|
inputSample = outSample / compensation; inputSample = (inputSample * dWet) + (nukeLevel * (1.0-dWet));
|
|
nukeLevel = inputSample;
|
|
}
|
|
|
|
if (wet < 1.0) {
|
|
inputSample = (drySample * (1.0-wet))+(inputSample * wet);
|
|
}
|
|
|
|
//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;
|
|
}
|
|
}
|
|
|