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Diffstat (limited to 'plugins/MacAU/Tape/Tape.cpp')
| -rwxr-xr-x | plugins/MacAU/Tape/Tape.cpp | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/plugins/MacAU/Tape/Tape.cpp b/plugins/MacAU/Tape/Tape.cpp new file mode 100755 index 0000000..43d9fdf --- /dev/null +++ b/plugins/MacAU/Tape/Tape.cpp @@ -0,0 +1,343 @@ +/* +* File: Tape.cpp +* +* Version: 1.0 +* +* Created: 1/21/20 +* +* Copyright: Copyright © 2020 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. +* +*/ +/*============================================================================= + Tape.cpp + +=============================================================================*/ +#include "Tape.h" + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +COMPONENT_ENTRY(Tape) + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// Tape::Tape +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Tape::Tape(AudioUnit component) + : AUEffectBase(component) +{ + CreateElements(); + Globals()->UseIndexedParameters(kNumberOfParameters); + SetParameter(kParam_One, kDefaultValue_ParamOne ); + +#if AU_DEBUG_DISPATCHER + mDebugDispatcher = new AUDebugDispatcher (this); +#endif + +} + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// Tape::GetParameterValueStrings +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult Tape::GetParameterValueStrings(AudioUnitScope inScope, + AudioUnitParameterID inParameterID, + CFArrayRef * outStrings) +{ + + return kAudioUnitErr_InvalidProperty; +} + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// Tape::GetParameterInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult Tape::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_Decibels; + outParameterInfo.minValue = -12.0; + outParameterInfo.maxValue = 12.0; + outParameterInfo.defaultValue = kDefaultValue_ParamOne; + break; + default: + result = kAudioUnitErr_InvalidParameter; + break; + } + } else { + result = kAudioUnitErr_InvalidParameter; + } + + + + return result; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// Tape::GetPropertyInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult Tape::GetPropertyInfo (AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + UInt32 & outDataSize, + Boolean & outWritable) +{ + return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// Tape::GetProperty +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult Tape::GetProperty( AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + void * outData ) +{ + return AUEffectBase::GetProperty (inID, inScope, inElement, outData); +} + +// Tape::Initialize +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult Tape::Initialize() +{ + ComponentResult result = AUEffectBase::Initialize(); + if (result == noErr) + Reset(kAudioUnitScope_Global, 0); + return result; +} + +#pragma mark ____TapeEffectKernel + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// Tape::TapeKernel::Reset() +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +void Tape::TapeKernel::Reset() +{ + iirMidRollerA = 0.0; + iirMidRollerB = 0.0; + iirHeadBumpA = 0.0; + iirHeadBumpB = 0.0; + flip = false; + for (int x = 0; x < 9; x++) {biquadA[x] = 0.0;biquadB[x] = 0.0;biquadC[x] = 0.0;biquadD[x] = 0.0;} + lastSample = 0.0; + fpd = 17; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// Tape::TapeKernel::Process +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +void Tape::TapeKernel::Process( const Float32 *inSourceP, + Float32 *inDestP, + UInt32 inFramesToProcess, + UInt32 inNumChannels, + bool &ioSilence ) +{ + UInt32 nSampleFrames = inFramesToProcess; + const Float32 *sourceP = inSourceP; + Float32 *destP = inDestP; + long double overallscale = 1.0; + overallscale /= 44100.0; + overallscale *= GetSampleRate(); + + Float64 inputgain = pow(10.0,GetParameter( kParam_One )/20.0); + Float64 HeadBumpFreq = 0.12/overallscale; + Float64 softness = 0.618033988749894848204586; + Float64 RollAmount = (1.0 - softness) / overallscale; + + //[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 + biquadA[0] = biquadB[0] = 0.0072/overallscale; + biquadA[1] = biquadB[1] = 0.0009; + double K = tan(M_PI * biquadB[0]); + double norm = 1.0 / (1.0 + K / biquadB[1] + K * K); + biquadA[2] = biquadB[2] = K / biquadB[1] * norm; + biquadA[4] = biquadB[4] = -biquadB[2]; + biquadA[5] = biquadB[5] = 2.0 * (K * K - 1.0) * norm; + biquadA[6] = biquadB[6] = (1.0 - K / biquadB[1] + K * K) * norm; + + biquadC[0] = biquadD[0] = 0.032/overallscale; + biquadC[1] = biquadD[1] = 0.0007; + K = tan(M_PI * biquadD[0]); + norm = 1.0 / (1.0 + K / biquadD[1] + K * K); + biquadC[2] = biquadD[2] = K / biquadD[1] * norm; + biquadC[4] = biquadD[4] = -biquadD[2]; + biquadC[5] = biquadD[5] = 2.0 * (K * K - 1.0) * norm; + biquadC[6] = biquadD[6] = (1.0 - K / biquadD[1] + K * K) * norm; + + while (nSampleFrames-- > 0) { + long double inputSample = *sourceP; + if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37; + long double drySample = inputSample; + + long double HighsSample = 0.0; + long double NonHighsSample = 0.0; + long double tempSample; + + if (flip) + { + iirMidRollerA = (iirMidRollerA * (1.0 - RollAmount)) + (inputSample * RollAmount); + HighsSample = inputSample - iirMidRollerA; + NonHighsSample = iirMidRollerA; + + iirHeadBumpA += (inputSample * 0.05); + iirHeadBumpA -= (iirHeadBumpA * iirHeadBumpA * iirHeadBumpA * HeadBumpFreq); + iirHeadBumpA = sin(iirHeadBumpA); + tempSample = (iirHeadBumpA * biquadA[2]) + biquadA[7]; + biquadA[7] = (iirHeadBumpA * biquadA[3]) - (tempSample * biquadA[5]) + biquadA[8]; + biquadA[8] = (iirHeadBumpA * biquadA[4]) - (tempSample * biquadA[6]); + iirHeadBumpA = tempSample; //interleaved biquad + if (iirHeadBumpA > 1.0) iirHeadBumpA = 1.0; + if (iirHeadBumpA < -1.0) iirHeadBumpA = -1.0; + iirHeadBumpA = asin(iirHeadBumpA); + + inputSample = sin(inputSample); + tempSample = (inputSample * biquadC[2]) + biquadC[7]; + biquadC[7] = (inputSample * biquadC[3]) - (tempSample * biquadC[5]) + biquadC[8]; + biquadC[8] = (inputSample * biquadC[4]) - (tempSample * biquadC[6]); + inputSample = tempSample; //interleaved biquad + if (inputSample > 1.0) inputSample = 1.0; + if (inputSample < -1.0) inputSample = -1.0; + inputSample = asin(inputSample); + } else { + iirMidRollerB = (iirMidRollerB * (1.0 - RollAmount)) + (inputSample * RollAmount); + HighsSample = inputSample - iirMidRollerB; + NonHighsSample = iirMidRollerB; + + iirHeadBumpB += (inputSample * 0.05); + iirHeadBumpB -= (iirHeadBumpB * iirHeadBumpB * iirHeadBumpB * HeadBumpFreq); + iirHeadBumpB = sin(iirHeadBumpB); + tempSample = (iirHeadBumpB * biquadB[2]) + biquadB[7]; + biquadB[7] = (iirHeadBumpB * biquadB[3]) - (tempSample * biquadB[5]) + biquadB[8]; + biquadB[8] = (iirHeadBumpB * biquadB[4]) - (tempSample * biquadB[6]); + iirHeadBumpB = tempSample; //interleaved biquad + if (iirHeadBumpB > 1.0) iirHeadBumpB = 1.0; + if (iirHeadBumpB < -1.0) iirHeadBumpB = -1.0; + iirHeadBumpB = asin(iirHeadBumpB); + + inputSample = sin(inputSample); + tempSample = (inputSample * biquadD[2]) + biquadD[7]; + biquadD[7] = (inputSample * biquadD[3]) - (tempSample * biquadD[5]) + biquadD[8]; + biquadD[8] = (inputSample * biquadD[4]) - (tempSample * biquadD[6]); + inputSample = tempSample; //interleaved biquad + if (inputSample > 1.0) inputSample = 1.0; + if (inputSample < -1.0) inputSample = -1.0; + inputSample = asin(inputSample); + } + flip = !flip; + + long double groundSample = drySample - inputSample; //set up UnBox + if (inputgain != 1.0) { + inputSample *= inputgain; + } //gain boost inside UnBox: do not boost fringe audio + + + long double applySoften = fabs(HighsSample)*1.57079633; + if (applySoften > 1.57079633) applySoften = 1.57079633; + applySoften = 1-cos(applySoften); + if (HighsSample > 0) inputSample -= applySoften; + if (HighsSample < 0) inputSample += applySoften; + //apply Soften depending on polarity + + if (inputSample > 1.2533141373155) inputSample = 1.2533141373155; + if (inputSample < -1.2533141373155) inputSample = -1.2533141373155; + //clip to 1.2533141373155 to reach maximum output + inputSample = sin(inputSample * fabs(inputSample)) / ((inputSample == 0.0) ?1:fabs(inputSample)); + //Spiral, for cleanest most optimal tape effect + + Float64 suppress = (1.0-fabs(inputSample)) * 0.00013; + if (iirHeadBumpA > suppress) iirHeadBumpA -= suppress; + if (iirHeadBumpA < -suppress) iirHeadBumpA += suppress; + if (iirHeadBumpB > suppress) iirHeadBumpB -= suppress; + if (iirHeadBumpB < -suppress) iirHeadBumpB += suppress; + //restrain resonant quality of head bump algorithm + + inputSample += groundSample; //apply UnBox processing + + inputSample += ((iirHeadBumpA + iirHeadBumpB) * 0.1);//and head bump + + if (lastSample >= 0.99) + { + if (inputSample < 0.99) lastSample = ((0.99*softness) + (inputSample * (1.0-softness))); + else lastSample = 0.99; + } + + if (lastSample <= -0.99) + { + if (inputSample > -0.99) lastSample = ((-0.99*softness) + (inputSample * (1.0-softness))); + else lastSample = -0.99; + } + + if (inputSample > 0.99) + { + if (lastSample < 0.99) inputSample = ((0.99*softness) + (lastSample * (1.0-softness))); + else inputSample = 0.99; + } + + if (inputSample < -0.99) + { + if (lastSample > -0.99) inputSample = ((-0.99*softness) + (lastSample * (1.0-softness))); + else inputSample = -0.99; + } + lastSample = inputSample; + + if (inputSample > 0.99) inputSample = 0.99; + if (inputSample < -0.99) inputSample = -0.99; + //final iron bar + + //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; + } +} + |