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StageProcFpu.hpp
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/*****************************************************************************
StageProcFpu.hpp
Author: Laurent de Soras, 2005
--- Legal stuff ---
This program is free software. It comes without any warranty, to
the extent permitted by applicable law. You can redistribute it
and/or modify it under the terms of the Do What The Fuck You Want
To Public License, Version 2, as published by Sam Hocevar. See
http://sam.zoy.org/wtfpl/COPYING for more details.
*Tab=3***********************************************************************/
#if defined (hiir_StageProc_CURRENT_CODEHEADER)
#error Recursive inclusion of StageProcFpu code header.
#endif
#define hiir_StageProc_CURRENT_CODEHEADER
#if ! defined (hiir_StageProc_CODEHEADER_INCLUDED)
#define hiir_StageProc_CODEHEADER_INCLUDED
/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
#if defined (_MSC_VER)
#pragma inline_depth (255)
#endif
namespace hiir
{
/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
template <typename DT>
void StageProcFpu <1, DT>::process_sample_pos (const int nbr_coefs, DT &spl_0, DT &/*spl_1*/, const DT coef [], DT x [], DT y [])
{
const int last = nbr_coefs - 1;
const DT temp = (spl_0 - y [last]) * coef [last] + x [last];
x [last] = spl_0;
y [last] = temp;
spl_0 = temp;
}
template <typename DT>
void StageProcFpu <0, DT>::process_sample_pos (const int /*nbr_coefs*/, DT &/*spl_0*/, DT &/*spl_1*/, const DT /*coef*/ [], DT /*x*/ [], DT /*y*/ [])
{
// Nothing (stops recursion)
}
template <int REMAINING, typename DT>
void StageProcFpu <REMAINING, DT>::process_sample_pos (const int nbr_coefs, DT &spl_0, DT &spl_1, const DT coef [], DT x [], DT y [])
{
const int cnt = nbr_coefs - REMAINING;
const DT temp_0 =
(spl_0 - y [cnt + 0]) * coef [cnt + 0] + x [cnt + 0];
const DT temp_1 =
(spl_1 - y [cnt + 1]) * coef [cnt + 1] + x [cnt + 1];
x [cnt + 0] = spl_0;
x [cnt + 1] = spl_1;
y [cnt + 0] = temp_0;
y [cnt + 1] = temp_1;
spl_0 = temp_0;
spl_1 = temp_1;
StageProcFpu <REMAINING - 2, DT>::process_sample_pos (
nbr_coefs,
spl_0,
spl_1,
&coef [0],
&x [0],
&y [0]
);
}
template <typename DT>
void StageProcFpu <1, DT>::process_sample_neg (const int nbr_coefs, DT &spl_0, DT &/*spl_1*/, const DT coef [], DT x [], DT y [])
{
const int last = nbr_coefs - 1;
const DT temp = (spl_0 + y [last]) * coef [last] - x [last];
x [last] = spl_0;
y [last] = temp;
spl_0 = temp;
}
template <typename DT>
void StageProcFpu <0, DT>::process_sample_neg (const int /*nbr_coefs*/, DT &/*spl_0*/, DT &/*spl_1*/, const DT /*coef*/ [], DT /*x*/ [], DT /*y*/ [])
{
// Nothing (stops recursion)
}
template <int REMAINING, typename DT>
void StageProcFpu <REMAINING, DT>::process_sample_neg (const int nbr_coefs, DT &spl_0, DT &spl_1, const DT coef [], DT x [], DT y [])
{
const int cnt = nbr_coefs - REMAINING;
const DT temp_0 =
(spl_0 + y [cnt + 0]) * coef [cnt + 0] - x [cnt + 0];
const DT temp_1 =
(spl_1 + y [cnt + 1]) * coef [cnt + 1] - x [cnt + 1];
x [cnt + 0] = spl_0;
x [cnt + 1] = spl_1;
y [cnt + 0] = temp_0;
y [cnt + 1] = temp_1;
spl_0 = temp_0;
spl_1 = temp_1;
StageProcFpu <REMAINING - 2, DT>::process_sample_neg (
nbr_coefs,
spl_0,
spl_1,
&coef [0],
&x [0],
&y [0]
);
}
/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
} // namespace hiir
#endif // hiir_StageProc_CODEHEADER_INCLUDED
#undef hiir_StageProc_CURRENT_CODEHEADER
/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/