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Downsampler2xSseOld.h
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/*****************************************************************************
Downsampler2xSseOld.h
Author: Laurent de Soras, 2005
Downsamples by a factor 2 the input signal, using SSE instruction set.
This object must be aligned on a 16-byte boundary!
If the number of coefficients is 2 or 3 modulo 4, the output is delayed from
1 sample, compared to the theoretical formula (or FPU implementation).
Template parameters:
- NC: number of coefficients, > 0
--- 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_Downsampler2xSseOld_HEADER_INCLUDED)
#define hiir_Downsampler2xSseOld_HEADER_INCLUDED
#if defined (_MSC_VER)
#pragma once
#pragma warning (4 : 4250) // "Inherits via dominance."
#endif
/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
#include "hiir/def.h"
#include "hiir/StageDataSse.h"
#include <array>
namespace hiir
{
template <int NC>
class Downsampler2xSseOld
{
static_assert ((NC > 0), "Number of coefficient must be positive.");
/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
public:
typedef float DataType;
static const int _nbr_chn = 1;
enum { NBR_COEFS = NC };
Downsampler2xSseOld ();
Downsampler2xSseOld (const Downsampler2xSseOld <NC> &other) = default;
Downsampler2xSseOld (Downsampler2xSseOld <NC> &&other) = default;
~Downsampler2xSseOld () = default;
Downsampler2xSseOld <NC> &
operator = (const Downsampler2xSseOld <NC> &other) = default;
Downsampler2xSseOld <NC> &
operator = (Downsampler2xSseOld <NC> &&other) = default;
void set_coefs (const double coef_arr []);
hiir_FORCEINLINE float
process_sample (const float in_ptr [2]);
void process_block (float out_ptr [], const float in_ptr [], long nbr_spl);
hiir_FORCEINLINE void
process_sample_split (float &low, float &high, const float in_ptr [2]);
void process_block_split (float out_l_ptr [], float out_h_ptr [], const float in_ptr [], long nbr_spl);
void clear_buffers ();
/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
protected:
/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
private:
enum { STAGE_WIDTH = 4 };
enum { NBR_STAGES = (NBR_COEFS + STAGE_WIDTH - 1) / STAGE_WIDTH };
typedef std::array <StageDataSse, NBR_STAGES + 1> Filter; // Stage 0 contains only input memory
Filter _filter; // Should be the first member (thus easier to align)
/*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
private:
bool operator == (const Downsampler2xSseOld <NC> &other) = delete;
bool operator != (const Downsampler2xSseOld <NC> &other) = delete;
}; // class Downsampler2xSseOld
} // namespace hiir
#include "hiir/Downsampler2xSseOld.hpp"
#endif // hiir_Downsampler2xSseOld_HEADER_INCLUDED
/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/