diff options
Diffstat (limited to 'plugins/MacAU/VinylDither/VinylDither.cpp')
-rwxr-xr-x | plugins/MacAU/VinylDither/VinylDither.cpp | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/plugins/MacAU/VinylDither/VinylDither.cpp b/plugins/MacAU/VinylDither/VinylDither.cpp new file mode 100755 index 0000000..dbbc63c --- /dev/null +++ b/plugins/MacAU/VinylDither/VinylDither.cpp @@ -0,0 +1,274 @@ +/* +* File: VinylDither.cpp +* +* Version: 1.0 +* +* Created: 11/17/16 +* +* Copyright: Copyright � 2016 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. +* +*/ +/*============================================================================= + VinylDither.cpp + +=============================================================================*/ +#include "VinylDither.h" + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +COMPONENT_ENTRY(VinylDither) + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// VinylDither::VinylDither +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +VinylDither::VinylDither(AudioUnit component) + : AUEffectBase(component) +{ + CreateElements(); + Globals()->UseIndexedParameters(kNumberOfParameters); + +#if AU_DEBUG_DISPATCHER + mDebugDispatcher = new AUDebugDispatcher (this); +#endif + +} + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// VinylDither::GetParameterValueStrings +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult VinylDither::GetParameterValueStrings(AudioUnitScope inScope, + AudioUnitParameterID inParameterID, + CFArrayRef * outStrings) +{ + + return kAudioUnitErr_InvalidProperty; +} + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// VinylDither::GetParameterInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult VinylDither::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; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// VinylDither::GetPropertyInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult VinylDither::GetPropertyInfo (AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + UInt32 & outDataSize, + Boolean & outWritable) +{ + return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// VinylDither::GetProperty +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult VinylDither::GetProperty( AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + void * outData ) +{ + return AUEffectBase::GetProperty (inID, inScope, inElement, outData); +} + +// VinylDither::Initialize +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult VinylDither::Initialize() +{ + ComponentResult result = AUEffectBase::Initialize(); + if (result == noErr) + Reset(kAudioUnitScope_Global, 0); + return result; +} + +#pragma mark ____VinylDitherEffectKernel + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// VinylDither::VinylDitherKernel::Reset() +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +void VinylDither::VinylDitherKernel::Reset() +{ + NSOdd = 0.0; + prev = 0.0; + ns[0] = 0; + ns[1] = 0; + ns[2] = 0; + ns[3] = 0; + ns[4] = 0; + ns[5] = 0; + ns[6] = 0; + ns[7] = 0; + ns[8] = 0; + ns[9] = 0; + ns[10] = 0; + ns[11] = 0; + ns[12] = 0; + ns[13] = 0; + ns[14] = 0; + ns[15] = 0; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// VinylDither::VinylDitherKernel::Process +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +void VinylDither::VinylDitherKernel::Process( const Float32 *inSourceP, + Float32 *inDestP, + UInt32 inFramesToProcess, + UInt32 inNumChannels, + bool &ioSilence ) +{ + UInt32 nSampleFrames = inFramesToProcess; + const Float32 *sourceP = inSourceP; + Float32 *destP = inDestP; + + long double inputSample; + Float64 absSample; + + + 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. + } + + + inputSample *= 8388608.0; + //0-1 is now one bit, now we dither + + absSample = ((rand()/(double)RAND_MAX) - 0.5); + ns[0] += absSample; ns[0] /= 2; absSample -= ns[0]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[1] += absSample; ns[1] /= 2; absSample -= ns[1]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[2] += absSample; ns[2] /= 2; absSample -= ns[2]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[3] += absSample; ns[3] /= 2; absSample -= ns[3]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[4] += absSample; ns[4] /= 2; absSample -= ns[4]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[5] += absSample; ns[5] /= 2; absSample -= ns[5]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[6] += absSample; ns[6] /= 2; absSample -= ns[6]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[7] += absSample; ns[7] /= 2; absSample -= ns[7]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[8] += absSample; ns[8] /= 2; absSample -= ns[8]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[9] += absSample; ns[9] /= 2; absSample -= ns[9]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[10] += absSample; ns[10] /= 2; absSample -= ns[10]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[11] += absSample; ns[11] /= 2; absSample -= ns[11]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[12] += absSample; ns[12] /= 2; absSample -= ns[12]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[13] += absSample; ns[13] /= 2; absSample -= ns[13]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[14] += absSample; ns[14] /= 2; absSample -= ns[14]; + absSample += ((rand()/(double)RAND_MAX) - 0.5); + ns[15] += absSample; ns[15] /= 2; absSample -= ns[15]; + //install noise and then shape it + absSample += inputSample; + + //NSOdd /= 1.0001; //NSDensity + + if (NSOdd > 0) NSOdd -= 0.97; + if (NSOdd < 0) NSOdd += 0.97; + + NSOdd -= (NSOdd * NSOdd * NSOdd * 0.475); + + NSOdd += prev; + absSample += (NSOdd*0.475); + prev = floor(absSample) - inputSample; + inputSample = floor(absSample); + //TenNines dither + + inputSample /= 8388608.0; + *destP = inputSample; + sourceP += inNumChannels; destP += inNumChannels; + } +} + |