/*
* 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. 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.
*
*/
/*=============================================================================
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;
}
}
