Clipper.cpp

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//
//  Clipper.cpp -- implementation of the Clipper class
//  See the copyright notice and acknowledgment of authors in the file COPYRIGHT
//

#include "Clipper.h"
#include <math.h>

using namespace csl;

// Generic Clipper implementation

// Constructor takes the input UGen and optionally the flags, min and max.
Clipper::Clipper(UnitGenerator & input, float min, float max, ClipperFlags flags)
                : Effect(input), mFlags(flags), mMin(min), mMax(max) { }

Clipper::~Clipper() { }

void Clipper::dump() {
    logMsg("a Clipper");
    UnitGenerator::dump();
}

// nextBuffer does the dirty work
void Clipper::nextBuffer(Buffer &outputBuffer, unsigned outBufNum) throw (CException) {

    float tempSample;
    sample * outp = outputBuffer.buffer(outBufNum);
    unsigned numFrames = outputBuffer.mNumFrames;

    pullInput(outputBuffer);
    sample * inPtr = mInputPtr;
    
#ifdef CSL_DEBUG
    logMsg("Clipper nextBuffer");
#endif      

        switch(mFlags) {
            case kMin:
                for (unsigned i = 0; i < numFrames; i++) {
                    tempSample = inPtr[i];
                    if (inPtr[i] < mMin )
                        tempSample = mMin;
                        
                    *outp++ = tempSample;
                }
                break;
            case kMax:
                for (unsigned i = 0; i < numFrames; i++) {
                    tempSample = inPtr[i];
                    if (inPtr[i] > mMax )
                        tempSample = mMax;
                        
                    *outp++ = tempSample;                   
                }
                break;
            case kBoth:
                for (unsigned i = 0; i < numFrames; i++) {
                    tempSample = inPtr[i];
                    if (inPtr[i] < mMin )
                        tempSample = mMin;
                    if (inPtr[i] > mMax )
                        tempSample = mMax;
                        
                    *outp++ = tempSample;
                }
                break;
        }

    return;

}