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/*
$Id: echofilter_generic.cpp,v 1.1 2001/03/06 15:09:26 mbn Exp $
------------------------------------------------------------------------
ClanLib, the platform independent game SDK.
This library is distributed under the GNU LIBRARY GENERAL PUBLIC LICENSE
version 2. See COPYING for details.
For a total list of contributers see CREDITS.
------------------------------------------------------------------------
*/
#ifdef WIN32
#pragma warning (disable:4786)
#endif
#include "echofilter_generic.h"
#include <memory.h>
CL_EchoFilter::CL_EchoFilter(int buffer_size, int shift_factor)
{
impl = new CL_EchoFilter_Generic;
impl->buffer_size = buffer_size;
impl->shift_factor = shift_factor;
impl->pos = 0;
impl->buffer = new int[buffer_size*2];
memset(impl->buffer, 0, sizeof(int)*buffer_size*2);
}
CL_EchoFilter::~CL_EchoFilter()
{
delete[] impl->buffer;
delete impl;
}
void CL_EchoFilter::filter(int *data, int size)
{
int *buffer = impl->buffer;
int &pos = impl->pos;
int &buffer_size = impl->buffer_size;
int &shift_factor = impl->shift_factor;
for (int i=0; i<size*2; i++)
{
buffer[pos] /= shift_factor;
buffer[pos] += data[i];
data[i] = buffer[pos];
pos++;
if (pos == buffer_size) pos = 0;
}
}
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