/* RTcmix - Copyright (C) 2004  The RTcmix Development Team   See ``AUTHORS'' for a list of contributors. See ``LICENSE'' for   the license to this software and for a DISCLAIMER OF ALL WARRANTIES.*/ #include "Odelay.h"#include <stdlib.h>#include <string.h>#include <assert.h>#include <cstdlib> Odelay::Odelay(long defaultLength) : _dline(NULL), _len(0){	assert(defaultLength > 0);	_outpoint = 0;	resize(defaultLength);	clear();	_inpoint = _len - 1;} Odelay::~Odelay(){	free(_dline);} void Odelay::clear(){	for (long i = 0; i < _len; i++)		_dline[i] = 0.0;	_lastout = 0.0;} void Odelay::fill(double val){	for (long i = 0; i < _len; i++)		_dline[i] = val;	_lastout = val;} void Odelay::putsamp(float samp){	_dline[_inpoint++] = samp;	if (_inpoint == _len)		_inpoint = 0;} float Odelay::getsamp(double lagsamps){	_outpoint = _inpoint - (long) lagsamps;	if (lagsamps >= (double) _len)		resize((long)(lagsamps + 0.5));	if (_len > 0) {		while (_outpoint < 0)			_outpoint += _len;	}	return _lastout = _dline[_outpoint++];} // Set output pointer <_outpoint>. void Odelay::setdelay(double lagsamps){	_outpoint = _inpoint - (long) lagsamps;	if (lagsamps >= (double) _len)		resize((long)(lagsamps + 0.5));	if (_len > 0) {		while (_outpoint < 0)			_outpoint += _len;	}} float Odelay::next(float input){	_dline[_inpoint++] = input;	if (_inpoint == _len)		_inpoint = 0;	_lastout = _dline[_outpoint++];	if (_outpoint == _len)		_outpoint = 0;	return _lastout;} static float *newFloats(float *oldptr, long oldlen, long *newlen){	float *ptr = NULL;	if (oldptr == NULL) {		ptr = (float *) malloc(*newlen * sizeof(float));	}	else {		float *newptr = (float *) realloc(oldptr, *newlen * sizeof(float));		if (newptr) {			ptr = newptr;			// Zero out new portion.			for (long n = oldlen; n < *newlen; ++n)				ptr[n] = 0.0f;		}		else {			*newlen = oldlen;	// notify caller that realloc failed			ptr = oldptr;		}	}	return ptr;} long Odelay::resize(long thisLength){	const long oldlen = _len;	// Make a guess at how big the new array should be.	long newlen = (thisLength < _len * 2) ? _len * 2 : _len + thisLength;	_dline = ::newFloats(_dline, _len, &newlen);	if (_outpoint < 0 && newlen > 0) {		while (_outpoint < 0)			_outpoint += oldlen;		long shift = newlen - oldlen;		memcpy(&_dline[_outpoint + shift],				&_dline[_outpoint],				sizeof(float) * (oldlen - _outpoint));		_outpoint += shift;	}	return _len = newlen;} float Odelay::delay() const{	return (float) (_len > 0) ? std::abs((_outpoint - _inpoint) % _len) : 0;}