TTClipper.cpp

/* 
 * Clipper
 * Extension Class for Jamoma DSP
 * Copyright © 2008, Timothy Place
 * 
 *
 * This is the simplest possible example of an extention, and can be used as a template for creating new extentions.
 *
 * License: This code is licensed under the terms of the "New BSD License"
 * http://creativecommons.org/licenses/BSD/
 */

#include "TTDSP.h"

#define thisTTClass             TTClipper
#define thisTTClassName         "clipper"
#define thisTTClassDescription  "Limits the amplitude of signals."
#define thisTTClassTags         "audio, processor"


/** Hard-clip signals to a low and high bound. */
 
class TTClipper : TTAudioObjectBase {
    TTCLASS_SETUP(TTClipper)

    TTFloat64   mLowBound;      ///< Attribute: low bound for clipping
    TTFloat64   mHighBound;     ///< Attribute: high bound for clipping
    
    TTErr calculateValue(const TTFloat64& x, TTFloat64& y, TTPtrSizedInt channel)
    {
        y = x;
        TTLimit(y, mLowBound, mHighBound);
        return kTTErrNone;
    }   
    
    /** Audio Processing Method */
    TTErr processAudio(TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
    {
        TT_WRAP_CALCULATE_METHOD(calculateValue);
    }
};

TT_AUDIO_CONSTRUCTOR_EXPORT(Clipper)
{
    addAttribute(       LowBound,   kTypeFloat64);
    addMessageProperty( LowBound,   description,    TT("Sets the minimum amplitude."));
    
    addAttribute(       HighBound,  kTypeFloat64);
    addMessageProperty( HighBound,  description,    TT("Sets the maximum amplitude."));
    
    setAttributeValue(TT("lowBound"), -1.0);    
    setAttributeValue(TT("highBound"), 1.0);
    setProcessMethod(processAudio); 
}


TTClipper::~TTClipper()
{;}