mirror of
https://github.com/airwindows/airwindows.git
synced 2026-05-15 14:16:00 -06:00
386 lines
16 KiB
C++
Executable file
386 lines
16 KiB
C++
Executable file
/*
|
|
* File: Biquad2.cpp
|
|
*
|
|
* Version: 1.0
|
|
*
|
|
* Created: 8/29/19
|
|
*
|
|
* Copyright: Copyright © 2019 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.
|
|
*
|
|
*/
|
|
/*=============================================================================
|
|
Biquad2.cpp
|
|
|
|
=============================================================================*/
|
|
#include "Biquad2.h"
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
AUDIOCOMPONENT_ENTRY(AUBaseFactory, Biquad2)
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// Biquad2::Biquad2
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
Biquad2::Biquad2(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 );
|
|
SetParameter(kParam_Five, kDefaultValue_ParamFive );
|
|
|
|
#if AU_DEBUG_DISPATCHER
|
|
mDebugDispatcher = new AUDebugDispatcher (this);
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// Biquad2::GetParameterValueStrings
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult Biquad2::GetParameterValueStrings(AudioUnitScope inScope,
|
|
AudioUnitParameterID inParameterID,
|
|
CFArrayRef * outStrings)
|
|
{
|
|
|
|
return kAudioUnitErr_InvalidProperty;
|
|
}
|
|
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// Biquad2::GetParameterInfo
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult Biquad2::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_Indexed;
|
|
outParameterInfo.minValue = 1;
|
|
outParameterInfo.maxValue = 4;
|
|
outParameterInfo.defaultValue = kDefaultValue_ParamOne;
|
|
break;
|
|
case kParam_Two:
|
|
AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
|
|
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
|
|
outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
|
|
outParameterInfo.minValue = 0.003;
|
|
outParameterInfo.maxValue = 1.0;
|
|
outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
|
|
break;
|
|
case kParam_Three:
|
|
AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
|
|
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
|
|
outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
|
|
outParameterInfo.minValue = 1.0;
|
|
outParameterInfo.maxValue = 50.0;
|
|
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;
|
|
case kParam_Five:
|
|
AUBase::FillInParameterName (outParameterInfo, kParameterFiveName, false);
|
|
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
|
|
outParameterInfo.minValue = -1.0;
|
|
outParameterInfo.maxValue = 1.0;
|
|
outParameterInfo.defaultValue = kDefaultValue_ParamFive;
|
|
break;
|
|
default:
|
|
result = kAudioUnitErr_InvalidParameter;
|
|
break;
|
|
}
|
|
} else {
|
|
result = kAudioUnitErr_InvalidParameter;
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// Biquad2::GetPropertyInfo
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult Biquad2::GetPropertyInfo (AudioUnitPropertyID inID,
|
|
AudioUnitScope inScope,
|
|
AudioUnitElement inElement,
|
|
UInt32 & outDataSize,
|
|
Boolean & outWritable)
|
|
{
|
|
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// Biquad2::GetProperty
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult Biquad2::GetProperty( AudioUnitPropertyID inID,
|
|
AudioUnitScope inScope,
|
|
AudioUnitElement inElement,
|
|
void * outData )
|
|
{
|
|
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
|
|
}
|
|
|
|
// Biquad2::Initialize
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
ComponentResult Biquad2::Initialize()
|
|
{
|
|
ComponentResult result = AUEffectBase::Initialize();
|
|
if (result == noErr)
|
|
Reset(kAudioUnitScope_Global, 0);
|
|
return result;
|
|
}
|
|
|
|
#pragma mark ____Biquad2EffectKernel
|
|
|
|
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// Biquad2::Biquad2Kernel::Reset()
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
void Biquad2::Biquad2Kernel::Reset()
|
|
{
|
|
for (int x = 0; x < 11; x++) {biquad[x] = 0.0; b[x] = 0.0; f[x] = 0.0;}
|
|
frequencychase = 0.0015;
|
|
resonancechase = 0.001;
|
|
outputchase = 1.0;
|
|
wetchase = 1.0;
|
|
|
|
frequencysetting = -1.0;
|
|
resonancesetting = -1.0;
|
|
outputsetting = -1.0;
|
|
wetsetting = -2.0; //-1.0 is a possible setting here and this forces an update on chasespeed
|
|
|
|
chasespeed = 500.0;
|
|
fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
|
|
}
|
|
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
// Biquad2::Biquad2Kernel::Process
|
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
void Biquad2::Biquad2Kernel::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();
|
|
|
|
int type = GetParameter( kParam_One);
|
|
Float64 average = GetParameter( kParam_Two );
|
|
Float64 frequencytarget = average*0.39; //biquad[0], goes to 1.0
|
|
frequencytarget /= overallscale;
|
|
if (frequencytarget < 0.0015/overallscale) frequencytarget = 0.0015/overallscale;
|
|
Float64 resonancetarget = GetParameter( kParam_Three ); //biquad[1], goes to 50.0
|
|
if (resonancetarget < 1.0) resonancetarget = 1.0;
|
|
Float64 outputtarget = GetParameter( kParam_Four ); //scaled to res
|
|
if (type < 3) outputtarget /= sqrt(resonancetarget);
|
|
Float64 wettarget = GetParameter( kParam_Five ); //wet, goes -1.0 to 1.0
|
|
|
|
//biquad contains these values:
|
|
//[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist
|
|
//[1] is resonance, 0.7071 is Butterworth. Also can't be zero
|
|
//[2] is a0 but you need distinct ones for additional biquad instances so it's here
|
|
//[3] is a1 but you need distinct ones for additional biquad instances so it's here
|
|
//[4] is a2 but you need distinct ones for additional biquad instances so it's here
|
|
//[5] is b1 but you need distinct ones for additional biquad instances so it's here
|
|
//[6] is b2 but you need distinct ones for additional biquad instances so it's here
|
|
//[7] is a stored delayed sample (freq and res are stored so you can move them sample by sample)
|
|
//[8] is a stored delayed sample (you have to include the coefficient making code if you do that)
|
|
//[9] is a stored delayed sample (you have to include the coefficient making code if you do that)
|
|
//[10] is a stored delayed sample (you have to include the coefficient making code if you do that)
|
|
Float64 K = tan(M_PI * biquad[0]);
|
|
Float64 norm = 1.0 / (1.0 + K / biquad[1] + K * K);
|
|
//finished setting up biquad
|
|
|
|
average = (1.0-average)*10.0; //max taps is 10, and low settings use more
|
|
|
|
if (type == 1 || type == 3) average = 1.0;
|
|
|
|
Float64 gain = average;
|
|
if (gain > 1.0) {f[0] = 1.0; gain -= 1.0;} else {f[0] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[1] = 1.0; gain -= 1.0;} else {f[1] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[2] = 1.0; gain -= 1.0;} else {f[2] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[3] = 1.0; gain -= 1.0;} else {f[3] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[4] = 1.0; gain -= 1.0;} else {f[4] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[5] = 1.0; gain -= 1.0;} else {f[5] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[6] = 1.0; gain -= 1.0;} else {f[6] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[7] = 1.0; gain -= 1.0;} else {f[7] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[8] = 1.0; gain -= 1.0;} else {f[8] = gain; gain = 0.0;}
|
|
if (gain > 1.0) {f[9] = 1.0; gain -= 1.0;} else {f[9] = gain; gain = 0.0;}
|
|
//there, now we have a neat little moving average with remainders
|
|
|
|
if (average < 1.0) average = 1.0;
|
|
f[0] /= average;
|
|
f[1] /= average;
|
|
f[2] /= average;
|
|
f[3] /= average;
|
|
f[4] /= average;
|
|
f[5] /= average;
|
|
f[6] /= average;
|
|
f[7] /= average;
|
|
f[8] /= average;
|
|
f[9] /= average;
|
|
//and now it's neatly scaled, too
|
|
//finished setting up average
|
|
|
|
while (nSampleFrames-- > 0) {
|
|
double inputSample = *sourceP;
|
|
if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
|
|
double drySample = *sourceP;
|
|
|
|
Float64 chasespeed = 50000;
|
|
if (frequencychase < frequencytarget) chasespeed = 500000;
|
|
chasespeed /= resonancechase;
|
|
chasespeed *= overallscale;
|
|
|
|
frequencychase = (((frequencychase*chasespeed)+frequencytarget)/(chasespeed+1.0));
|
|
|
|
Float64 fasterchase = 1000 * overallscale;
|
|
resonancechase = (((resonancechase*fasterchase)+resonancetarget)/(fasterchase+1.0));
|
|
outputchase = (((outputchase*fasterchase)+outputtarget)/(fasterchase+1.0));
|
|
wetchase = (((wetchase*fasterchase)+wettarget)/(fasterchase+1.0));
|
|
if (biquad[0] != frequencychase) {biquad[0] = frequencychase; K = tan(M_PI * biquad[0]);}
|
|
if (biquad[1] != resonancechase) {biquad[1] = resonancechase; norm = 1.0 / (1.0 + K / biquad[1] + K * K);}
|
|
|
|
if (type == 1) { //lowpass
|
|
biquad[2] = K * K * norm;
|
|
biquad[3] = 2.0 * biquad[2];
|
|
biquad[4] = biquad[2];
|
|
biquad[5] = 2.0 * (K * K - 1.0) * norm;
|
|
}
|
|
|
|
if (type == 2) { //highpass
|
|
biquad[2] = norm;
|
|
biquad[3] = -2.0 * biquad[2];
|
|
biquad[4] = biquad[2];
|
|
biquad[5] = 2.0 * (K * K - 1.0) * norm;
|
|
}
|
|
|
|
if (type == 3) { //bandpass
|
|
biquad[2] = K / biquad[1] * norm;
|
|
biquad[3] = 0.0; //bandpass can simplify the biquad kernel: leave out this multiply
|
|
biquad[4] = -biquad[2];
|
|
biquad[5] = 2.0 * (K * K - 1.0) * norm;
|
|
}
|
|
|
|
if (type == 4) { //notch
|
|
biquad[2] = (1.0 + K * K) * norm;
|
|
biquad[3] = 2.0 * (K * K - 1) * norm;
|
|
biquad[4] = biquad[2];
|
|
biquad[5] = biquad[3];
|
|
}
|
|
|
|
biquad[6] = (1.0 - K / biquad[1] + K * K) * norm;
|
|
|
|
inputSample = sin(inputSample);
|
|
//encode Console5: good cleanness
|
|
|
|
double 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; inputSample = outSample; biquad[10] = biquad[9]; biquad[9] = inputSample; //DF1
|
|
|
|
if (inputSample > 1.0) inputSample = 1.0;
|
|
if (inputSample < -1.0) inputSample = -1.0;
|
|
|
|
b[9] = b[8]; b[8] = b[7]; b[7] = b[6]; b[6] = b[5];
|
|
b[5] = b[4]; b[4] = b[3]; b[3] = b[2]; b[2] = b[1];
|
|
b[1] = b[0]; b[0] = inputSample;
|
|
|
|
inputSample *= f[0];
|
|
inputSample += (b[1] * f[1]);
|
|
inputSample += (b[2] * f[2]);
|
|
inputSample += (b[3] * f[3]);
|
|
inputSample += (b[4] * f[4]);
|
|
inputSample += (b[5] * f[5]);
|
|
inputSample += (b[6] * f[6]);
|
|
inputSample += (b[7] * f[7]);
|
|
inputSample += (b[8] * f[8]);
|
|
inputSample += (b[9] * f[9]); //intense averaging on deeper cutoffs
|
|
|
|
if (inputSample > 1.0) inputSample = 1.0;
|
|
if (inputSample < -1.0) inputSample = -1.0;
|
|
//without this, you can get a NaN condition where it spits out DC offset at full blast!
|
|
inputSample = asin(inputSample);
|
|
//amplitude aspect
|
|
if (inputSample > 1.0) inputSample = 1.0;
|
|
if (inputSample < -1.0) inputSample = -1.0;
|
|
//and then Console5 will spit out overs if you let it
|
|
|
|
if (outputchase < 1.0) {
|
|
inputSample *= outputchase;
|
|
}
|
|
|
|
if (wetchase < 1.0) {
|
|
inputSample = (inputSample*wetchase) + (drySample*(1.0-fabs(wetchase)));
|
|
//inv/dry/wet lets us turn LP into HP and band into notch
|
|
}
|
|
|
|
//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;
|
|
}
|
|
}
|
|
|