mirror of
https://github.com/airwindows/airwindows.git
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264 lines
11 KiB
C++
Executable file
264 lines
11 KiB
C++
Executable file
/*
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* File: Console5DarkCh.cpp
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*
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* Version: 1.0
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*
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* Created: 1/5/18
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*
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* Copyright: Copyright © 2018 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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Console5DarkCh.cpp
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=============================================================================*/
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#include "Console5DarkCh.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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AUDIOCOMPONENT_ENTRY(AUBaseFactory, Console5DarkCh)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Console5DarkCh::Console5DarkCh
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Console5DarkCh::Console5DarkCh(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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#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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// Console5DarkCh::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Console5DarkCh::GetParameterValueStrings(AudioUnitScope inScope,
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AudioUnitParameterID inParameterID,
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CFArrayRef * outStrings)
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{
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return kAudioUnitErr_InvalidProperty;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Console5DarkCh::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Console5DarkCh::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_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamOne;
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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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// Console5DarkCh::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Console5DarkCh::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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// Console5DarkCh::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Console5DarkCh::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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// Console5DarkCh::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Console5DarkCh::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 ____Console5DarkChEffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Console5DarkCh::Console5DarkChKernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Console5DarkCh::Console5DarkChKernel::Reset()
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{
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lastSampleChannel = 0.0;
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lastFXChannel = 0.0;
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iirCorrect = 0.0;
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gainchase = -90.0;
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settingchase = -90.0;
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chasespeed = 350.0;
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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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// Console5DarkCh::Console5DarkChKernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Console5DarkCh::Console5DarkChKernel::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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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= GetSampleRate();
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Float64 inputgain = GetParameter( kParam_One );
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Float64 difference;
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Float64 nearZero;
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Float64 servoTrim = 0.0000001 / overallscale;
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Float64 bassTrim = 0.005 / overallscale;
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double inputSample;
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if (settingchase != inputgain) {
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chasespeed *= 2.0;
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settingchase = inputgain;
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}
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if (chasespeed > 2500.0) chasespeed = 2500.0;
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if (gainchase < 0.0) gainchase = inputgain;
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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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chasespeed *= 0.9999;
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chasespeed -= 0.01;
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if (chasespeed < 350.0) chasespeed = 350.0;
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//we have our chase speed compensated for recent fader activity
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gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0));
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//gainchase is chasing the target, as a simple multiply gain factor
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if (1.0 != gainchase) inputSample *= gainchase;
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//done with trim control
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difference = lastSampleChannel - inputSample;
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lastSampleChannel = inputSample;
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//derive slew part off direct sample measurement + from last time
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if (difference > 1.0) difference = 1.0;
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if (difference < -1.0) difference = -1.0;
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//clamp the slew correction to prevent invalid math results
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difference = lastFXChannel + sin(difference);
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//we're about to use this twice and then not use difference again, so we'll reuse it
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//enhance slew is arcsin(): cutting it back is sin()
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iirCorrect += inputSample - difference;
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inputSample = difference;
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//apply the slew to stored value: can develop DC offsets.
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//store the change we made so we can dial it back
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lastFXChannel = inputSample;
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if (lastFXChannel > 1.0) lastFXChannel = 1.0;
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if (lastFXChannel < -1.0) lastFXChannel = -1.0;
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//store current sample as new base for next offset
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nearZero = pow(fabs(fabs(lastFXChannel)-1.0), 2);
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//if the sample is very near zero this number is higher.
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if (iirCorrect > 0) iirCorrect -= servoTrim;
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if (iirCorrect < 0) iirCorrect += servoTrim;
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//cut back the servo by which we're pulling back the DC
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lastFXChannel += (iirCorrect * 0.0000005);
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//apply the servo to the stored value, pulling back the DC
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lastFXChannel *= (1.0 - (nearZero * bassTrim));
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//this cuts back the DC offset directly, relative to how near zero we are
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if (inputSample > 1.57079633) inputSample = 1.57079633;
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if (inputSample < -1.57079633) inputSample = -1.57079633;
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inputSample = sin(inputSample);
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//amplitude aspect
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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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