Ditherbox… and individual dithers

1 files changed, 272 insertions, 0 deletions

diff --git a/plugins/MacAU/NodeDither/NodeDither.cpp b/plugins/MacAU/NodeDither/NodeDither.cpp
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+++ b/plugins/MacAU/NodeDither/NodeDither.cpp
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+/*
+*	File:		NodeDither.cpp
+*	
+*	Version:	1.0
+* 
+*	Created:	12/7/16
+*	
+*	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.
+*
+*/
+/*=============================================================================
+	NodeDither.cpp
+	
+=============================================================================*/
+#include "NodeDither.h"
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+COMPONENT_ENTRY(NodeDither)
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//	NodeDither::NodeDither
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+NodeDither::NodeDither(AudioUnit component)
+	: AUEffectBase(component)
+{
+	CreateElements();
+	Globals()->UseIndexedParameters(kNumberOfParameters);
+	SetParameter(kParam_One, kDefaultValue_ParamOne );
+	SetParameter(kParam_Two, kDefaultValue_ParamTwo );
+         
+#if AU_DEBUG_DISPATCHER
+	mDebugDispatcher = new AUDebugDispatcher (this);
+#endif
+	
+}
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//	NodeDither::GetParameterValueStrings
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult			NodeDither::GetParameterValueStrings(AudioUnitScope		inScope,
+                                                                AudioUnitParameterID	inParameterID,
+                                                                CFArrayRef *		outStrings)
+{
+    if ((inScope == kAudioUnitScope_Global) && (inParameterID == kParam_Two)) //ID must be actual name of parameter identifier, not number
+	{
+		if (outStrings == NULL) return noErr;
+		CFStringRef strings [] =
+		{
+			kMenuItem_Out,
+			kMenuItem_In,
+		};
+		*outStrings = CFArrayCreate (
+									 NULL,
+									 (const void **) strings,
+									 (sizeof (strings) / sizeof (strings [0])),
+									 NULL
+									 );
+		return noErr;
+	}
+    return kAudioUnitErr_InvalidProperty;
+}
+
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//	NodeDither::GetParameterInfo
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult			NodeDither::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_Generic;
+                outParameterInfo.minValue = 0.0;
+                outParameterInfo.maxValue = 100.0;
+                outParameterInfo.defaultValue = kDefaultValue_ParamOne;
+                break;
+			case kParam_Two:
+                AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
+				outParameterInfo.unit = kAudioUnitParameterUnit_Indexed;
+                outParameterInfo.minValue = kOut;
+                outParameterInfo.maxValue = kIn;
+                outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
+				break;
+			default:
+                result = kAudioUnitErr_InvalidParameter;
+                break;
+            }
+	} else {
+        result = kAudioUnitErr_InvalidParameter;
+    }
+    
+
+
+	return result;
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//	NodeDither::GetPropertyInfo
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult			NodeDither::GetPropertyInfo (AudioUnitPropertyID	inID,
+                                                        AudioUnitScope		inScope,
+                                                        AudioUnitElement	inElement,
+                                                        UInt32 &		outDataSize,
+                                                        Boolean &		outWritable)
+{
+	return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//	NodeDither::GetProperty
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult			NodeDither::GetProperty(	AudioUnitPropertyID inID,
+                                                        AudioUnitScope 		inScope,
+                                                        AudioUnitElement 	inElement,
+                                                        void *			outData )
+{
+	return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
+}
+
+//	NodeDither::Initialize
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult NodeDither::Initialize()
+{
+    ComponentResult result = AUEffectBase::Initialize();
+    if (result == noErr)
+        Reset(kAudioUnitScope_Global, 0);
+    return result;
+}
+
+#pragma mark ____NodeDitherEffectKernel
+
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//	NodeDither::NodeDitherKernel::Reset()
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+void		NodeDither::NodeDitherKernel::Reset()
+{
+	for(int count = 0; count < 4999; count++) {d[count] = 0;}
+	gcount = 0;
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//	NodeDither::NodeDitherKernel::Process
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+void		NodeDither::NodeDitherKernel::Process(	const Float32 	*inSourceP,
+                                                    Float32		 	*inDestP,
+                                                    UInt32 			inFramesToProcess,
+                                                    UInt32			inNumChannels, 
+                                                    bool			&ioSilence )
+{
+	UInt32 nSampleFrames = inFramesToProcess;
+	const Float32 *sourceP = inSourceP;
+	Float32 *destP = inDestP;
+	
+	Float64 depthA = GetParameter( kParam_One );
+	Float64 overallscale = 1.0;
+	overallscale /= 44100.0;
+	overallscale *= GetSampleRate();
+	
+	int offsetA = (int)(depthA * overallscale);
+	if (offsetA < 1) offsetA = 1;
+	if (offsetA > 2440) offsetA = 2440;
+	
+	int phase = GetParameter( kParam_Two );
+	//0 default is out of phase, 1 is in phase
+	
+	long double inputSample;
+	Float64 currentDither;
+	
+	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
+		
+		if (gcount < 0 || gcount > 2450) {gcount = 2450;}
+				
+		currentDither = (rand()/(double)RAND_MAX);
+		inputSample += currentDither;
+		
+		if (phase == 1) {
+			inputSample -= 1.0;
+			inputSample += d[gcount+offsetA];
+		} else {
+			inputSample -= d[gcount+offsetA];
+		}
+		//in phase means adding, otherwise we subtract
+		
+		
+		inputSample = floor(inputSample);
+		d[gcount+2450] = d[gcount] = currentDither;
+		
+		gcount--;
+		
+		inputSample /= 8388608.0;
+		*destP = inputSample;
+		sourceP += inNumChannels; destP += inNumChannels;
+	}
+}
+