/* * File: SubsOnly.cpp * * Version: 1.0 * * Created: 8/28/11 * * Copyright: Copyright © 2011 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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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. * */ /*============================================================================= SubsOnly.h =============================================================================*/ #include "SubsOnly.h" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ COMPONENT_ENTRY(SubsOnly) //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::SubsOnly //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SubsOnly::SubsOnly(AudioUnit component) : AUEffectBase(component) { CreateElements(); Globals()->UseIndexedParameters(kNumberOfParameters); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult SubsOnly::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult SubsOnly::GetParameterInfo(AudioUnitScope inScope, AudioUnitParameterID inParameterID, AudioUnitParameterInfo &outParameterInfo ) { ComponentResult result = noErr; outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable | kAudioUnitParameterFlag_IsReadable; if (inScope == kAudioUnitScope_Global) { switch(inParameterID) { default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult SubsOnly::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult SubsOnly::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult SubsOnly::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____SubsOnlyEffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::SubsOnlyKernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void SubsOnly::SubsOnlyKernel::Reset() { iirSampleA = 0.0; iirSampleB = 0.0; iirSampleC = 0.0; iirSampleD = 0.0; iirSampleE = 0.0; iirSampleF = 0.0; iirSampleG = 0.0; iirSampleH = 0.0; iirSampleI = 0.0; iirSampleJ = 0.0; iirSampleK = 0.0; iirSampleL = 0.0; iirSampleM = 0.0; iirSampleN = 0.0; iirSampleO = 0.0; iirSampleP = 0.0; iirSampleQ = 0.0; iirSampleR = 0.0; iirSampleS = 0.0; iirSampleT = 0.0; iirSampleU = 0.0; iirSampleV = 0.0; iirSampleW = 0.0; iirSampleX = 0.0; iirSampleY = 0.0; iirSampleZ = 0.0; fpNShape = 0.0; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // SubsOnly::SubsOnlyKernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void SubsOnly::SubsOnlyKernel::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(); Float64 iirAmount = 2250/44100.0; Float64 gaintarget = 1.42; Float64 gain; iirAmount /= overallscale; Float64 altAmount = 1.0 - iirAmount; Float64 inputSample; while (nSampleFrames-- > 0) { inputSample = *sourceP; if (inputSample<1.2e-38 && -inputSample<1.2e-38) { static int noisesource = 0; //this declares a variable before anything else is compiled. It won't keep assigning //it to 0 for every sample, it's as if the declaration doesn't exist in this context, //but it lets me add this denormalization fix in a single place rather than updating //it in three different locations. The variable isn't thread-safe but this is only //a random seed and we can share it with whatever. 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; //this denormalization routine produces a white noise at -300 dB which the noise //shaping will interact with to produce a bipolar output, but the noise is actually //all positive. That should stop any variables from going denormal, and the routine //only kicks in if digital black is input. As a final touch, if you save to 24-bit //the silence will return to being digital black again. } gain = gaintarget; inputSample *= gain; gain = ((gain-1)*0.75)+1; iirSampleA = (iirSampleA * altAmount) + (inputSample * iirAmount); inputSample = iirSampleA; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleB = (iirSampleB * altAmount) + (inputSample * iirAmount); inputSample = iirSampleB; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleC = (iirSampleC * altAmount) + (inputSample * iirAmount); inputSample = iirSampleC; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleD = (iirSampleD * altAmount) + (inputSample * iirAmount); inputSample = iirSampleD; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleE = (iirSampleE * altAmount) + (inputSample * iirAmount); inputSample = iirSampleE; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleF = (iirSampleF * altAmount) + (inputSample * iirAmount); inputSample = iirSampleF; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleG = (iirSampleG * altAmount) + (inputSample * iirAmount); inputSample = iirSampleG; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleH = (iirSampleH * altAmount) + (inputSample * iirAmount); inputSample = iirSampleH; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleI = (iirSampleI * altAmount) + (inputSample * iirAmount); inputSample = iirSampleI; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleJ = (iirSampleJ * altAmount) + (inputSample * iirAmount); inputSample = iirSampleJ; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleK = (iirSampleK * altAmount) + (inputSample * iirAmount); inputSample = iirSampleK; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleL = (iirSampleL * altAmount) + (inputSample * iirAmount); inputSample = iirSampleL; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleM = (iirSampleM * altAmount) + (inputSample * iirAmount); inputSample = iirSampleM; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleN = (iirSampleN * altAmount) + (inputSample * iirAmount); inputSample = iirSampleN; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleO = (iirSampleO * altAmount) + (inputSample * iirAmount); inputSample = iirSampleO; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleP = (iirSampleP * altAmount) + (inputSample * iirAmount); inputSample = iirSampleP; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleQ = (iirSampleQ * altAmount) + (inputSample * iirAmount); inputSample = iirSampleQ; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleR = (iirSampleR * altAmount) + (inputSample * iirAmount); inputSample = iirSampleR; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleS = (iirSampleS * altAmount) + (inputSample * iirAmount); inputSample = iirSampleS; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleT = (iirSampleT * altAmount) + (inputSample * iirAmount); inputSample = iirSampleT; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleU = (iirSampleU * altAmount) + (inputSample * iirAmount); inputSample = iirSampleU; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleV = (iirSampleV * altAmount) + (inputSample * iirAmount); inputSample = iirSampleV; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleW = (iirSampleW * altAmount) + (inputSample * iirAmount); inputSample = iirSampleW; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleX = (iirSampleX * altAmount) + (inputSample * iirAmount); inputSample = iirSampleX; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleY = (iirSampleY * altAmount) + (inputSample * iirAmount); inputSample = iirSampleY; inputSample *= gain; gain = ((gain-1)*0.75)+1; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; iirSampleZ = (iirSampleZ * altAmount) + (inputSample * iirAmount); inputSample = iirSampleZ; if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; //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; } }