/* * File: AtmosphereBuss.cpp * * Version: 1.0 * * Created: 3/10/18 * * Copyright: Copyright © 2018 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. 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Globals()->UseIndexedParameters(kNumberOfParameters); SetParameter(kParam_One, kDefaultValue_ParamOne ); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // AtmosphereBuss::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult AtmosphereBuss::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // AtmosphereBuss::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult AtmosphereBuss::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; default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // AtmosphereBuss::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult AtmosphereBuss::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // AtmosphereBuss::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult AtmosphereBuss::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // AtmosphereBuss::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult AtmosphereBuss::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____AtmosphereBussEffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // AtmosphereBuss::AtmosphereBussKernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void AtmosphereBuss::AtmosphereBussKernel::Reset() { gainchase = -90.0; settingchase = -90.0; chasespeed = 350.0; fpNShape = 0.0; lastSampleA = 0.0; lastSampleB = 0.0; lastSampleC = 0.0; lastSampleD = 0.0; lastSampleE = 0.0; lastSampleF = 0.0; lastSampleG = 0.0; lastSampleH = 0.0; lastSampleI = 0.0; lastSampleJ = 0.0; lastSampleK = 0.0; lastSampleL = 0.0; lastSampleM = 0.0; thresholdA = 0.618033988749894; thresholdB = 0.679837387624884; thresholdC = 0.747821126387373; thresholdD = 0.82260323902611; thresholdE = 0.904863562928721; thresholdF = 0.995349919221593; thresholdG = 1.094884911143752; thresholdH = 1.204373402258128; thresholdI = 1.32481074248394; thresholdJ = 1.457291816732335; thresholdK = 1.603020998405568; thresholdL = 1.763323098246125; thresholdM = 1.939655408070737; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // AtmosphereBuss::AtmosphereBussKernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void AtmosphereBuss::AtmosphereBussKernel::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(); long double inputSample; long double drySample; long double clamp; Float64 inputgain = GetParameter( kParam_One ); if (settingchase != inputgain) { chasespeed *= 2.0; settingchase = inputgain; } if (chasespeed > 2500.0) chasespeed = 2500.0; if (gainchase < 0.0) gainchase = inputgain; thresholdA = 0.618033988749894 / overallscale; thresholdB = 0.679837387624884 / overallscale; thresholdC = 0.747821126387373 / overallscale; thresholdD = 0.82260323902611 / overallscale; thresholdE = 0.904863562928721 / overallscale; thresholdF = 0.995349919221593 / overallscale; thresholdG = 1.094884911143752 / overallscale; thresholdH = 1.204373402258128 / overallscale; thresholdI = 1.32481074248394 / overallscale; thresholdJ = 1.457291816732335 / overallscale; thresholdK = 1.603020998405568 / overallscale; thresholdL = 1.763323098246125 / overallscale; thresholdM = 1.939655408070737 / overallscale; while (nSampleFrames-- > 0) { inputSample = *sourceP; static int noisesource = 0; noisesource = noisesource % 1700021; noisesource++; int residue = noisesource * noisesource; residue = residue % 170003; residue *= residue; residue = residue % 17011; residue *= residue; residue = residue % 1709; residue *= residue; residue = residue % 173; residue *= residue; residue = residue % 17; double applyresidue = residue; applyresidue *= 0.00000001; applyresidue *= 0.00000001; inputSample += applyresidue; //for Atmopshere, we always apply the dither noise. Then, if our result is //effectively digital black, we'll subtract it again. We want a 'air' hiss if (inputSample<1.2e-38 && -inputSample<1.2e-38) { inputSample -= applyresidue; } chasespeed *= 0.9999; chasespeed -= 0.01; if (chasespeed < 350.0) chasespeed = 350.0; //we have our chase speed compensated for recent fader activity gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0)); //gainchase is chasing the target, as a simple multiply gain factor if (1.0 != gainchase) inputSample *= gainchase; //done with trim control drySample = inputSample; clamp = inputSample - lastSampleA; if (clamp > thresholdA) inputSample = lastSampleA + thresholdA; if (-clamp > thresholdA) inputSample = lastSampleA - thresholdA; clamp = inputSample - lastSampleB; if (clamp > thresholdB) inputSample = lastSampleB + thresholdB; if (-clamp > thresholdB) inputSample = lastSampleB - thresholdB; clamp = inputSample - lastSampleC; if (clamp > thresholdC) inputSample = lastSampleC + thresholdC; if (-clamp > thresholdC) inputSample = lastSampleC - thresholdC; clamp = inputSample - lastSampleD; if (clamp > thresholdD) inputSample = lastSampleD + thresholdD; if (-clamp > thresholdD) inputSample = lastSampleD - thresholdD; clamp = inputSample - lastSampleE; if (clamp > thresholdE) inputSample = lastSampleE + thresholdE; if (-clamp > thresholdE) inputSample = lastSampleE - thresholdE; clamp = inputSample - lastSampleF; if (clamp > thresholdF) inputSample = lastSampleF + thresholdF; if (-clamp > thresholdF) inputSample = lastSampleF - thresholdF; clamp = inputSample - lastSampleG; if (clamp > thresholdG) inputSample = lastSampleG + thresholdG; if (-clamp > thresholdG) inputSample = lastSampleG - thresholdG; clamp = inputSample - lastSampleH; if (clamp > thresholdH) inputSample = lastSampleH + thresholdH; if (-clamp > thresholdH) inputSample = lastSampleH - thresholdH; clamp = inputSample - lastSampleI; if (clamp > thresholdI) inputSample = lastSampleI + thresholdI; if (-clamp > thresholdI) inputSample = lastSampleI - thresholdI; clamp = inputSample - lastSampleJ; if (clamp > thresholdJ) inputSample = lastSampleJ + thresholdJ; if (-clamp > thresholdJ) inputSample = lastSampleJ - thresholdJ; clamp = inputSample - lastSampleK; if (clamp > thresholdK) inputSample = lastSampleK + thresholdK; if (-clamp > thresholdK) inputSample = lastSampleK - thresholdK; clamp = inputSample - lastSampleL; if (clamp > thresholdL) inputSample = lastSampleL + thresholdL; if (-clamp > thresholdL) inputSample = lastSampleL - thresholdL; clamp = inputSample - lastSampleM; if (clamp > thresholdM) inputSample = lastSampleM + thresholdM; if (-clamp > thresholdM) inputSample = lastSampleM - thresholdM; 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 lastSampleM = lastSampleL; lastSampleL = lastSampleK; lastSampleK = lastSampleJ; lastSampleJ = lastSampleI; lastSampleI = lastSampleH; lastSampleH = lastSampleG; lastSampleG = lastSampleF; lastSampleF = lastSampleE; lastSampleE = lastSampleD; lastSampleD = lastSampleC; lastSampleC = lastSampleB; lastSampleB = lastSampleA; lastSampleA = drySample; //store the raw input sample again for use next time //32 bit dither, made small and tidy. int expon; frexpf((Float32)inputSample, &expon); long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); inputSample += (dither-fpNShape); fpNShape = dither; //end 32 bit dither *destP = inputSample; sourceP += inNumChannels; destP += inNumChannels; } }