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Diffstat (limited to 'plugins/MacAU/BiquadStereo/BiquadStereo.cpp')
| -rwxr-xr-x | plugins/MacAU/BiquadStereo/BiquadStereo.cpp | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/plugins/MacAU/BiquadStereo/BiquadStereo.cpp b/plugins/MacAU/BiquadStereo/BiquadStereo.cpp new file mode 100755 index 0000000..bbe1323 --- /dev/null +++ b/plugins/MacAU/BiquadStereo/BiquadStereo.cpp @@ -0,0 +1,370 @@ +/* +* File: BiquadStereo.cpp +* +* Version: 1.0 +* +* Created: 6/29/19 +* +* Copyright: Copyright © 2019 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. +* +*/ +/*============================================================================= + BiquadStereo.cpp + +=============================================================================*/ +#include "BiquadStereo.h" + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +COMPONENT_ENTRY(BiquadStereo) + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadStereo::BiquadStereo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +BiquadStereo::BiquadStereo(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 ); + +#if AU_DEBUG_DISPATCHER + mDebugDispatcher = new AUDebugDispatcher (this); +#endif + +} + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadStereo::GetParameterValueStrings +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadStereo::GetParameterValueStrings(AudioUnitScope inScope, + AudioUnitParameterID inParameterID, + CFArrayRef * outStrings) +{ + + return kAudioUnitErr_InvalidProperty; +} + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadStereo::GetParameterInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadStereo::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 = 1.0; + outParameterInfo.maxValue = 4.0; + outParameterInfo.defaultValue = kDefaultValue_ParamOne; + break; + case kParam_Two: + AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false); + outParameterInfo.unit = kAudioUnitParameterUnit_Generic; + outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic; + outParameterInfo.minValue = 0.0001; + 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 = 0.01; + outParameterInfo.maxValue = 30.0; + outParameterInfo.defaultValue = kDefaultValue_ParamThree; + break; + case kParam_Four: + AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false); + outParameterInfo.unit = kAudioUnitParameterUnit_Generic; + outParameterInfo.minValue = -1.0; + outParameterInfo.maxValue = 1.0; + outParameterInfo.defaultValue = kDefaultValue_ParamFour; + break; + default: + result = kAudioUnitErr_InvalidParameter; + break; + } + } else { + result = kAudioUnitErr_InvalidParameter; + } + + + + return result; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadStereo::GetPropertyInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadStereo::GetPropertyInfo (AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + UInt32 & outDataSize, + Boolean & outWritable) +{ + return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// state that plugin supports only stereo-in/stereo-out processing +UInt32 BiquadStereo::SupportedNumChannels(const AUChannelInfo ** outInfo) +{ + if (outInfo != NULL) + { + static AUChannelInfo info; + info.inChannels = 2; + info.outChannels = 2; + *outInfo = &info; + } + + return 1; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadStereo::GetProperty +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadStereo::GetProperty( AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + void * outData ) +{ + return AUEffectBase::GetProperty (inID, inScope, inElement, outData); +} + +// BiquadStereo::Initialize +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadStereo::Initialize() +{ + ComponentResult result = AUEffectBase::Initialize(); + if (result == noErr) + Reset(kAudioUnitScope_Global, 0); + return result; +} + +#pragma mark ____BiquadStereoEffectKernel + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadStereo::BiquadStereoKernel::Reset() +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadStereo::Reset(AudioUnitScope inScope, AudioUnitElement inElement) +{ + for (int x = 0; x < 11; x++) {biquad[x] = 0.0;} + fpd = 17; + return noErr; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadStereo::ProcessBufferLists +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +OSStatus BiquadStereo::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags, + const AudioBufferList & inBuffer, + AudioBufferList & outBuffer, + UInt32 inFramesToProcess) +{ + Float32 * inputL = (Float32*)(inBuffer.mBuffers[0].mData); + Float32 * inputR = (Float32*)(inBuffer.mBuffers[1].mData); + Float32 * outputL = (Float32*)(outBuffer.mBuffers[0].mData); + Float32 * outputR = (Float32*)(outBuffer.mBuffers[1].mData); + UInt32 nSampleFrames = inFramesToProcess; + long double overallscale = 1.0; + overallscale /= 44100.0; + overallscale *= GetSampleRate(); + + int type = GetParameter( kParam_One); + + biquad[0] = GetParameter( kParam_Two )*0.499; + if (biquad[0] < 0.0001) biquad[0] = 0.0001; + + biquad[1] = GetParameter( kParam_Three ); + if (biquad[1] < 0.0001) biquad[1] = 0.0001; + + Float64 wet = GetParameter( kParam_Four ); + + //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 LEFT stored delayed sample (freq and res are stored so you can move them sample by sample) + //[8] is LEFT stored delayed sample (you have to include the coefficient making code if you do that) + //[9] is RIGHT stored delayed sample (freq and res are stored so you can move them sample by sample) + //[10] is RIGHT stored delayed sample (you have to include the coefficient making code if you do that) + + //to build a dedicated filter, rename 'biquad' to whatever the new filter is, then + //put this code either within the sample buffer (for smoothly modulating freq or res) + //or in this 'read the controls' area (for letting you change freq and res with controls) + //or in 'reset' if the freq and res are absolutely fixed (use GetSampleRate to define freq) + + if (type == 1) { //lowpass + double K = tan(M_PI * biquad[0]); + double norm = 1.0 / (1.0 + K / biquad[1] + K * K); + biquad[2] = K * K * norm; + biquad[3] = 2.0 * biquad[2]; + biquad[4] = biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + biquad[6] = (1.0 - K / biquad[1] + K * K) * norm; + } + + if (type == 2) { //highpass + double K = tan(M_PI * biquad[0]); + double norm = 1.0 / (1.0 + K / biquad[1] + K * K); + biquad[2] = norm; + biquad[3] = -2.0 * biquad[2]; + biquad[4] = biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + biquad[6] = (1.0 - K / biquad[1] + K * K) * norm; + } + + if (type == 3) { //bandpass + double K = tan(M_PI * biquad[0]); + double norm = 1.0 / (1.0 + K / biquad[1] + K * K); + 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; + biquad[6] = (1.0 - K / biquad[1] + K * K) * norm; + } + + if (type == 4) { //notch + double K = tan(M_PI * biquad[0]); + double norm = 1.0 / (1.0 + K / biquad[1] + K * K); + 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; + } + + while (nSampleFrames-- > 0) { + long double inputSampleL = *inputL; + long double inputSampleR = *inputR; + if (fabs(inputSampleL)<1.18e-37) inputSampleL = fpd * 1.18e-37; + if (fabs(inputSampleR)<1.18e-37) inputSampleR = fpd * 1.18e-37; + long double drySampleL = inputSampleL; + long double drySampleR = inputSampleR; + + + inputSampleL = sin(inputSampleL); + inputSampleR = sin(inputSampleR); + //encode Console5: good cleanness + + /* + long double mid = inputSampleL + inputSampleR; + long double side = inputSampleL - inputSampleR; + //assign mid and side.Between these sections, you can do mid/side processing + + long double tempSampleM = (mid * biquad[2]) + biquad[7]; + biquad[7] = (mid * biquad[3]) - (tempSampleM * biquad[5]) + biquad[8]; + biquad[8] = (mid * biquad[4]) - (tempSampleM * biquad[6]); + mid = tempSampleM; //like mono AU, 7 and 8 store mid channel + + long double tempSampleS = (side * biquad[2]) + biquad[9]; + biquad[9] = (side * biquad[3]) - (tempSampleS * biquad[5]) + biquad[10]; + biquad[10] = (side * biquad[4]) - (tempSampleS * biquad[6]); + inputSampleR = tempSampleS; //note: 9 and 10 store the side channel + + inputSampleL = (mid+side)/2.0; + inputSampleR = (mid-side)/2.0; + //unassign mid and side + */ + + long double tempSampleL = (inputSampleL * biquad[2]) + biquad[7]; + biquad[7] = (inputSampleL * biquad[3]) - (tempSampleL * biquad[5]) + biquad[8]; + biquad[8] = (inputSampleL * biquad[4]) - (tempSampleL * biquad[6]); + inputSampleL = tempSampleL; //like mono AU, 7 and 8 store L channel + + long double tempSampleR = (inputSampleR * biquad[2]) + biquad[9]; + biquad[9] = (inputSampleR * biquad[3]) - (tempSampleR * biquad[5]) + biquad[10]; + biquad[10] = (inputSampleR * biquad[4]) - (tempSampleR * biquad[6]); + inputSampleR = tempSampleR; //note: 9 and 10 store the R channel + + if (inputSampleL > 1.0) inputSampleL = 1.0; + if (inputSampleL < -1.0) inputSampleL = -1.0; + if (inputSampleR > 1.0) inputSampleR = 1.0; + if (inputSampleR < -1.0) inputSampleR = -1.0; + //without this, you can get a NaN condition where it spits out DC offset at full blast! + inputSampleL = asin(inputSampleL); + inputSampleR = asin(inputSampleR); + //amplitude aspect + + if (wet < 1.0) { + inputSampleL = (inputSampleL*wet) + (drySampleL*(1.0-fabs(wet))); + inputSampleR = (inputSampleR*wet) + (drySampleR*(1.0-fabs(wet))); + //inv/dry/wet lets us turn LP into HP and band into notch + } + + //begin 32 bit stereo floating point dither + int expon; frexpf((float)inputSampleL, &expon); + fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5; + inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62)); + frexpf((float)inputSampleR, &expon); + fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5; + inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62)); + //end 32 bit stereo floating point dither + + *outputL = inputSampleL; + *outputR = inputSampleR; + //direct stereo out + + inputL += 1; + inputR += 1; + outputL += 1; + outputR += 1; + } + return noErr; +} + |