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// buffer.h
/******************************************************************************
*
* MiXViews - an X window system based sound & data editor/processor
*
* Copyright (c) 1993, 1994 Regents of the University of California
*
* Author: Douglas Scott
* Date: December 13, 1994
*
* Permission to use, copy and modify this software and its documentation
* for research and/or educational purposes and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation. The author reserves the right to distribute this
* software and its documentation. The University of California and the author
* make no representations about the suitability of this software for any
* purpose, and in no event shall University of California be liable for any
* damage, loss of data, or profits resulting from its use.
* It is provided "as is" without express or implied warranty.
*
******************************************************************************/
// Buffer is a first-in first-out circular array. It and its subclasses are
// used as input and output queues in the QueuedOutputFunction and
// InputOutputFunction classes.
#ifndef BUFFER_H
#ifdef __GNUG__
#pragma interface
#endif
#define BUFFER_H
#include "localdefs.h"
class Buffer {
protected:
Buffer(int size);
virtual ~Buffer();
void setSize(int);
virtual void reset();
void incrementInput();
void incrementOutput();
double* buffer;
double* inputPointer;
double* outputPointer;
double* bufferEnd; // cache end for quick comparison
int maxQueue;
};
inline void
Buffer::incrementInput() {
inputPointer++;
inputPointer = (inputPointer > bufferEnd) ? buffer : inputPointer;
}
inline void
Buffer::incrementOutput() {
outputPointer++;
outputPointer = (outputPointer > bufferEnd) ? buffer : outputPointer;
}
#endif
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