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airwindows/plugins/MacAU/BitDualPan/BitDualPan.cpp
Christopher Johnson 824cfc024d VerbThic
2025-11-28 16:15:14 -05:00

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/*
* File: BitDualPan.cpp
*
* Version: 1.0
*
* Created: 11/18/25
*
* Copyright: Copyright © 2025 Airwindows, Airwindows uses the MIT license
*
* 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.
*
*/
/*=============================================================================
BitDualPan.cpp
=============================================================================*/
#include "BitDualPan.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(BitDualPan)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// BitDualPan::BitDualPan
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BitDualPan::BitDualPan(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_A, kDefaultValue_ParamA );
SetParameter(kParam_B, kDefaultValue_ParamB );
SetParameter(kParam_C, kDefaultValue_ParamC );
SetParameter(kParam_D, kDefaultValue_ParamD );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// BitDualPan::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult BitDualPan::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// BitDualPan::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult BitDualPan::GetParameterInfo(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
ComponentResult result = noErr;
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
| kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global) {
switch(inParameterID)
{
case kParam_A:
AUBase::FillInParameterName (outParameterInfo, kParameterAName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamA;
break;
case kParam_B:
AUBase::FillInParameterName (outParameterInfo, kParameterBName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamB;
break;
case kParam_C:
AUBase::FillInParameterName (outParameterInfo, kParameterCName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamC;
break;
case kParam_D:
AUBase::FillInParameterName (outParameterInfo, kParameterDName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamD;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// BitDualPan::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult BitDualPan::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 BitDualPan::SupportedNumChannels(const AUChannelInfo ** outInfo)
{
if (outInfo != NULL)
{
static AUChannelInfo info;
info.inChannels = 2;
info.outChannels = 2;
*outInfo = &info;
}
return 1;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// BitDualPan::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult BitDualPan::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// BitDualPan::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult BitDualPan::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____BitDualPanEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// BitDualPan::BitDualPanKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult BitDualPan::Reset(AudioUnitScope inScope, AudioUnitElement inElement)
{
return noErr;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// BitDualPan::ProcessBufferLists
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
OSStatus BitDualPan::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;
double gainControl = (GetParameter( kParam_A )*0.5)+0.05; //0.0 to 1.0
int gainBits = 20; //start beyond maximum attenuation
if (gainControl > 0.0) gainBits = floor(1.0 / gainControl);
int bitshiftL = gainBits - 3;
int bitshiftR = gainBits - 3;
double panControl = (GetParameter( kParam_B )*2.0)-1.0; //-1.0 to 1.0
double panAttenuation = (1.0-fabs(panControl));
int panBits = 20; //start centered
if (panAttenuation > 0.0) panBits = floor(1.0 / panAttenuation);
if (panControl > 0.25) bitshiftL += panBits;
if (panControl < -0.25) bitshiftR += panBits;
if (bitshiftL < -2) bitshiftL = -2; if (bitshiftL > 17) bitshiftL = 17;
if (bitshiftR < -2) bitshiftR = -2; if (bitshiftR > 17) bitshiftR = 17;
double LgainL = 1.0;
double LgainR = 1.0;
switch (bitshiftL)
{
case 17: LgainL = 0.0; break;
case 16: LgainL = 0.0000152587890625; break;
case 15: LgainL = 0.000030517578125; break;
case 14: LgainL = 0.00006103515625; break;
case 13: LgainL = 0.0001220703125; break;
case 12: LgainL = 0.000244140625; break;
case 11: LgainL = 0.00048828125; break;
case 10: LgainL = 0.0009765625; break;
case 9: LgainL = 0.001953125; break;
case 8: LgainL = 0.00390625; break;
case 7: LgainL = 0.0078125; break;
case 6: LgainL = 0.015625; break;
case 5: LgainL = 0.03125; break;
case 4: LgainL = 0.0625; break;
case 3: LgainL = 0.125; break;
case 2: LgainL = 0.25; break;
case 1: LgainL = 0.5; break;
case 0: LgainL = 1.0; break;
case -1: LgainL = 2.0; break;
case -2: LgainL = 4.0; break;
}
switch (bitshiftR)
{
case 17: LgainR = 0.0; break;
case 16: LgainR = 0.0000152587890625; break;
case 15: LgainR = 0.000030517578125; break;
case 14: LgainR = 0.00006103515625; break;
case 13: LgainR = 0.0001220703125; break;
case 12: LgainR = 0.000244140625; break;
case 11: LgainR = 0.00048828125; break;
case 10: LgainR = 0.0009765625; break;
case 9: LgainR = 0.001953125; break;
case 8: LgainR = 0.00390625; break;
case 7: LgainR = 0.0078125; break;
case 6: LgainR = 0.015625; break;
case 5: LgainR = 0.03125; break;
case 4: LgainR = 0.0625; break;
case 3: LgainR = 0.125; break;
case 2: LgainR = 0.25; break;
case 1: LgainR = 0.5; break;
case 0: LgainR = 1.0; break;
case -1: LgainR = 2.0; break;
case -2: LgainR = 4.0; break;
}
gainControl = (GetParameter( kParam_C )*0.5)+0.05; //0.0 to 1.0
gainBits = 20; //start beyond maximum attenuation
if (gainControl > 0.0) gainBits = floor(1.0 / gainControl);
bitshiftL = gainBits - 3;
bitshiftR = gainBits - 3;
panControl = (GetParameter( kParam_D )*2.0)-1.0; //-1.0 to 1.0
panAttenuation = (1.0-fabs(panControl));
panBits = 20; //start centered
if (panAttenuation > 0.0) panBits = floor(1.0 / panAttenuation);
if (panControl > 0.25) bitshiftL += panBits;
if (panControl < -0.25) bitshiftR += panBits;
if (bitshiftL < -2) bitshiftL = -2; if (bitshiftL > 17) bitshiftL = 17;
if (bitshiftR < -2) bitshiftR = -2; if (bitshiftR > 17) bitshiftR = 17;
double RgainL = 1.0;
double RgainR = 1.0;
switch (bitshiftL)
{
case 17: RgainL = 0.0; break;
case 16: RgainL = 0.0000152587890625; break;
case 15: RgainL = 0.000030517578125; break;
case 14: RgainL = 0.00006103515625; break;
case 13: RgainL = 0.0001220703125; break;
case 12: RgainL = 0.000244140625; break;
case 11: RgainL = 0.00048828125; break;
case 10: RgainL = 0.0009765625; break;
case 9: RgainL = 0.001953125; break;
case 8: RgainL = 0.00390625; break;
case 7: RgainL = 0.0078125; break;
case 6: RgainL = 0.015625; break;
case 5: RgainL = 0.03125; break;
case 4: RgainL = 0.0625; break;
case 3: RgainL = 0.125; break;
case 2: RgainL = 0.25; break;
case 1: RgainL = 0.5; break;
case 0: RgainL = 1.0; break;
case -1: RgainL = 2.0; break;
case -2: RgainL = 4.0; break;
}
switch (bitshiftR)
{
case 17: RgainR = 0.0; break;
case 16: RgainR = 0.0000152587890625; break;
case 15: RgainR = 0.000030517578125; break;
case 14: RgainR = 0.00006103515625; break;
case 13: RgainR = 0.0001220703125; break;
case 12: RgainR = 0.000244140625; break;
case 11: RgainR = 0.00048828125; break;
case 10: RgainR = 0.0009765625; break;
case 9: RgainR = 0.001953125; break;
case 8: RgainR = 0.00390625; break;
case 7: RgainR = 0.0078125; break;
case 6: RgainR = 0.015625; break;
case 5: RgainR = 0.03125; break;
case 4: RgainR = 0.0625; break;
case 3: RgainR = 0.125; break;
case 2: RgainR = 0.25; break;
case 1: RgainR = 0.5; break;
case 0: RgainR = 1.0; break;
case -1: RgainR = 2.0; break;
case -2: RgainR = 4.0; break;
}
while (nSampleFrames-- > 0) {
double monoL = *inputL;
double monoR = *inputR;
*outputL = (monoL*LgainL)+(monoR*RgainL);
*outputR = (monoL*LgainR)+(monoR*RgainR);
inputL += 1;
inputR += 1;
outputL += 1;
outputR += 1;
}
return noErr;
}
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