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467 lines
17 KiB
C++
Executable file
467 lines
17 KiB
C++
Executable file
/*
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* File: ADClip7.cpp
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*
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* Version: 1.0
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*
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* Created: 8/2/17
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*
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* Copyright: Copyright © 2017 Airwindows, Airwindows uses the MIT license
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*
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* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
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* consideration of your agreement to the following terms, and your use, installation, modification
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* or redistribution of this Apple software constitutes acceptance of these terms. If you do
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* not agree with these terms, please do not use, install, modify or redistribute this Apple
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* software.
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*
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* In consideration of your agreement to abide by the following terms, and subject to these terms,
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* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this
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* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the
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* Apple Software, with or without modifications, in source and/or binary forms; provided that if you
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* redistribute the Apple Software in its entirety and without modifications, you must retain this
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* notice and the following text and disclaimers in all such redistributions of the Apple Software.
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* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to
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* endorse or promote products derived from the Apple Software without specific prior written
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* permission from Apple. Except as expressly stated in this notice, no other rights or
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* licenses, express or implied, are granted by Apple herein, including but not limited to any
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* patent rights that may be infringed by your derivative works or by other works in which the
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* Apple Software may be incorporated.
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*
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* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
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* IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
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* OR IN COMBINATION WITH YOUR PRODUCTS.
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*
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* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
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* REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
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* UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
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* IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*=============================================================================
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ADClip7.cpp
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=============================================================================*/
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#include "ADClip7.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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AUDIOCOMPONENT_ENTRY(AUBaseFactory, ADClip7)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ADClip7::ADClip7
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ADClip7::ADClip7(AudioUnit component)
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: AUEffectBase(component)
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{
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CreateElements();
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Globals()->UseIndexedParameters(kNumberOfParameters);
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SetParameter(kParam_One, kDefaultValue_ParamOne );
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SetParameter(kParam_Two, kDefaultValue_ParamTwo );
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SetParameter(kParam_Three, kDefaultValue_ParamThree );
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SetParameter(kParam_Four, kDefaultValue_ParamFour );
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#if AU_DEBUG_DISPATCHER
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mDebugDispatcher = new AUDebugDispatcher (this);
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#endif
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ADClip7::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ADClip7::GetParameterValueStrings(AudioUnitScope inScope,
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AudioUnitParameterID inParameterID,
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CFArrayRef * outStrings)
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{
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if ((inScope == kAudioUnitScope_Global) && (inParameterID == kParam_Four)) //ID must be actual name of parameter identifier, not number
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{
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if (outStrings == NULL) return noErr;
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CFStringRef strings [] =
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{
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kMenuItem_Normal,
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kMenuItem_Gain,
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kMenuItem_Clip,
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};
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*outStrings = CFArrayCreate (
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NULL,
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(const void **) strings,
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(sizeof (strings) / sizeof (strings [0])),
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NULL
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);
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return noErr;
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}
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return kAudioUnitErr_InvalidProperty;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ADClip7::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ADClip7::GetParameterInfo(AudioUnitScope inScope,
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AudioUnitParameterID inParameterID,
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AudioUnitParameterInfo &outParameterInfo )
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{
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ComponentResult result = noErr;
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outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
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| kAudioUnitParameterFlag_IsReadable;
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if (inScope == kAudioUnitScope_Global) {
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switch(inParameterID)
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{
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case kParam_One:
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AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Decibels;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 18.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamOne;
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break;
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case kParam_Two:
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AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
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break;
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case kParam_Three:
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AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamThree;
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break;
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case kParam_Four:
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AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Indexed;
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outParameterInfo.minValue = kNormal;
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outParameterInfo.maxValue = kClip;
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outParameterInfo.defaultValue = kDefaultValue_ParamFour;
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break;
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default:
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result = kAudioUnitErr_InvalidParameter;
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break;
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}
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} else {
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result = kAudioUnitErr_InvalidParameter;
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}
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return result;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ADClip7::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ADClip7::GetPropertyInfo (AudioUnitPropertyID inID,
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AudioUnitScope inScope,
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AudioUnitElement inElement,
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UInt32 & outDataSize,
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Boolean & outWritable)
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{
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return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ADClip7::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ADClip7::GetProperty( AudioUnitPropertyID inID,
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AudioUnitScope inScope,
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AudioUnitElement inElement,
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void * outData )
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{
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return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
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}
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// ADClip7::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ADClip7::Initialize()
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{
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ComponentResult result = AUEffectBase::Initialize();
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if (result == noErr)
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Reset(kAudioUnitScope_Global, 0);
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return result;
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}
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#pragma mark ____ADClip7EffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ADClip7::ADClip7Kernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void ADClip7::ADClip7Kernel::Reset()
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{
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lastSample = 0.0;
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for(int count = 0; count < 22199; count++) {b[count] = 0;}
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gcount = 0;
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lows = 0;
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refclip = 0.99;
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iirLowsA = 0.0;
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iirLowsB = 0.0;
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fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ADClip7::ADClip7Kernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void ADClip7::ADClip7Kernel::Process( const Float32 *inSourceP,
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Float32 *inDestP,
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UInt32 inFramesToProcess,
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UInt32 inNumChannels,
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bool &ioSilence )
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{
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UInt32 nSampleFrames = inFramesToProcess;
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const Float32 *sourceP = inSourceP;
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Float32 *destP = inDestP;
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Float64 overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= GetSampleRate();
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Float64 fpOld = 0.618033988749894848204586; //golden ratio!
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Float64 fpNew = 1.0 - fpOld;
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Float64 inputGain = pow(10.0,(GetParameter( kParam_One ))/20.0);
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Float64 softness = GetParameter( kParam_Two ) * fpNew;
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Float64 hardness = 1.0 - softness;
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Float64 highslift = 0.307 * GetParameter( kParam_Three );
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Float64 adjust = pow(highslift,3) * 0.416;
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Float64 subslift = 0.796 * GetParameter( kParam_Three );
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Float64 calibsubs = subslift/53;
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Float64 invcalibsubs = 1.0 - calibsubs;
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Float64 subs = 0.81 + (calibsubs*2);
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double bridgerectifier;
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int mode = (int) GetParameter( kParam_Four );
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Float64 overshoot;
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Float64 offsetH1 = 1.84;
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offsetH1 *= overallscale;
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Float64 offsetH2 = offsetH1 * 1.9;
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Float64 offsetH3 = offsetH1 * 2.7;
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Float64 offsetL1 = 612;
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offsetL1 *= overallscale;
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Float64 offsetL2 = offsetL1 * 2.0;
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int refH1 = (int)floor(offsetH1);
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int refH2 = (int)floor(offsetH2);
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int refH3 = (int)floor(offsetH3);
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int refL1 = (int)floor(offsetL1);
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int refL2 = (int)floor(offsetL2);
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int temp;
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Float64 fractionH1 = offsetH1 - floor(offsetH1);
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Float64 fractionH2 = offsetH2 - floor(offsetH2);
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Float64 fractionH3 = offsetH3 - floor(offsetH3);
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Float64 minusH1 = 1.0 - fractionH1;
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Float64 minusH2 = 1.0 - fractionH2;
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Float64 minusH3 = 1.0 - fractionH3;
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Float64 highs = 0.0;
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int count = 0;
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double inputSample;
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while (nSampleFrames-- > 0) {
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inputSample = *sourceP;
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if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
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if (inputGain != 1.0) {
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inputSample *= inputGain;
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}
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overshoot = fabs(inputSample) - refclip;
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if (overshoot < 0.0) overshoot = 0.0;
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if (gcount < 0 || gcount > 11020) {gcount = 11020;}
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count = gcount;
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b[count+11020] = b[count] = overshoot;
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gcount--;
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if (highslift > 0.0)
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{
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//we have a big pile of b[] which is overshoots
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temp = count+refH3;
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highs = -(b[temp] * minusH3); //less as value moves away from .0
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highs -= b[temp+1]; //we can assume always using this in one way or another?
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highs -= (b[temp+2] * fractionH3); //greater as value moves away from .0
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highs += (((b[temp]-b[temp+1])-(b[temp+1]-b[temp+2]))/50); //interpolation hacks 'r us
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highs *= adjust; //add in the kernel elements backwards saves multiplies
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//stage 3 is a negative add
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temp = count+refH2;
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highs += (b[temp] * minusH2); //less as value moves away from .0
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highs += b[temp+1]; //we can assume always using this in one way or another?
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highs += (b[temp+2] * fractionH2); //greater as value moves away from .0
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highs -= (((b[temp]-b[temp+1])-(b[temp+1]-b[temp+2]))/50); //interpolation hacks 'r us
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highs *= adjust; //add in the kernel elements backwards saves multiplies
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//stage 2 is a positive feedback of the overshoot
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temp = count+refH1;
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highs -= (b[temp] * minusH1); //less as value moves away from .0
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highs -= b[temp+1]; //we can assume always using this in one way or another?
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highs -= (b[temp+2] * fractionH1); //greater as value moves away from .0
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highs += (((b[temp]-b[temp+1])-(b[temp+1]-b[temp+2]))/50); //interpolation hacks 'r us
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highs *= adjust; //add in the kernel elements backwards saves multiplies
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//stage 1 is a negative feedback of the overshoot
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//done with interpolated mostly negative feedback of the overshoot
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}
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bridgerectifier = sin(fabs(highs) * hardness);
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//this will wrap around and is scaled back by softness
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//wrap around is the same principle as Fracture: no top limit to sin()
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if (highs > 0) highs = bridgerectifier;
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else highs = -bridgerectifier;
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if (subslift > 0.0)
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{
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lows *= subs;
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//going in we'll reel back some of the swing
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temp = count+refL1;
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lows -= b[temp+127];
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lows -= b[temp+113];
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lows -= b[temp+109];
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lows -= b[temp+107];
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lows -= b[temp+103];
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lows -= b[temp+101];
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lows -= b[temp+97];
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lows -= b[temp+89];
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lows -= b[temp+83];
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lows -= b[temp+79];
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lows -= b[temp+73];
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lows -= b[temp+71];
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lows -= b[temp+67];
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lows -= b[temp+61];
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lows -= b[temp+59];
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lows -= b[temp+53];
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lows -= b[temp+47];
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lows -= b[temp+43];
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lows -= b[temp+41];
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lows -= b[temp+37];
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lows -= b[temp+31];
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lows -= b[temp+29];
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lows -= b[temp+23];
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lows -= b[temp+19];
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lows -= b[temp+17];
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lows -= b[temp+13];
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lows -= b[temp+11];
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lows -= b[temp+7];
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lows -= b[temp+5];
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lows -= b[temp+3];
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lows -= b[temp+2];
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lows -= b[temp+1];
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//initial negative lobe
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lows *= subs;
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lows *= subs;
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//twice, to minimize the suckout in low boost situations
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temp = count+refL2;
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lows += b[temp+127];
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lows += b[temp+113];
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lows += b[temp+109];
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lows += b[temp+107];
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lows += b[temp+103];
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lows += b[temp+101];
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lows += b[temp+97];
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lows += b[temp+89];
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lows += b[temp+83];
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lows += b[temp+79];
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lows += b[temp+73];
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lows += b[temp+71];
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lows += b[temp+67];
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lows += b[temp+61];
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lows += b[temp+59];
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lows += b[temp+53];
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lows += b[temp+47];
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lows += b[temp+43];
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lows += b[temp+41];
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lows += b[temp+37];
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lows += b[temp+31];
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lows += b[temp+29];
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lows += b[temp+23];
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lows += b[temp+19];
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lows += b[temp+17];
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lows += b[temp+13];
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lows += b[temp+11];
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lows += b[temp+7];
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lows += b[temp+5];
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lows += b[temp+3];
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lows += b[temp+2];
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lows += b[temp+1];
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lows *= subs;
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//followup positive lobe
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//now we have the lows content to use
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}
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bridgerectifier = sin(fabs(lows) * softness);
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//this will wrap around and is scaled back by hardness: hard = less bass push, more treble
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//wrap around is the same principle as Fracture: no top limit to sin()
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if (lows > 0) lows = bridgerectifier;
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else lows = -bridgerectifier;
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iirLowsA = (iirLowsA * invcalibsubs) + (lows * calibsubs);
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lows = iirLowsA;
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bridgerectifier = sin(fabs(lows));
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if (lows > 0) lows = bridgerectifier;
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else lows = -bridgerectifier;
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iirLowsB = (iirLowsB * invcalibsubs) + (lows * calibsubs);
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lows = iirLowsB;
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bridgerectifier = sin(fabs(lows)) * 2.0;
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if (lows > 0) lows = bridgerectifier;
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else lows = -bridgerectifier;
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if (highslift > 0.0) inputSample += (highs * (1.0-fabs(inputSample*hardness)));
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if (subslift > 0.0) inputSample += (lows * (1.0-fabs(inputSample*softness)));
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if (inputSample > refclip && refclip > 0.9) refclip -= 0.01;
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if (inputSample < -refclip && refclip > 0.9) refclip -= 0.01;
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if (refclip < 0.99) refclip += 0.00001;
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//adjust clip level on the fly
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if (lastSample >= refclip)
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{
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if (inputSample < refclip) lastSample = ((refclip*hardness) + (inputSample * softness));
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else lastSample = refclip;
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}
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if (lastSample <= -refclip)
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{
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if (inputSample > -refclip) lastSample = ((-refclip*hardness) + (inputSample * softness));
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else lastSample = -refclip;
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}
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if (inputSample > refclip)
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{
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if (lastSample < refclip) inputSample = ((refclip*hardness) + (lastSample * softness));
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else inputSample = refclip;
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}
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if (inputSample < -refclip)
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{
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if (lastSample > -refclip) inputSample = ((-refclip*hardness) + (lastSample * softness));
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else inputSample = -refclip;
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}
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lastSample = inputSample;
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switch (mode)
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{
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case 1: break; //Normal
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case 2: inputSample /= inputGain; break; //Gain Match
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case 3: inputSample = overshoot + highs + lows; break; //Clip Only
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}
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//this is our output mode switch, showing the effects
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if (inputSample > refclip) inputSample = refclip;
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if (inputSample < -refclip) inputSample = -refclip;
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//final iron bar
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//begin 32 bit floating point dither
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int expon; frexpf((float)inputSample, &expon);
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fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
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inputSample += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit floating point dither
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*destP = inputSample;
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sourceP += inNumChannels; destP += inNumChannels;
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}
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}
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