117 lines
2.9 KiB
C++
117 lines
2.9 KiB
C++
/*****************************************************************************
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Upsampler2xNeon.h
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Author: Laurent de Soras, 2016
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Upsamples by a factor 2 the input signal, using NEON instruction set.
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This object must be aligned on a 16-byte boundary!
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If the number of coefficients is 2 or 3 modulo 4, the output is delayed from
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1 sample, compared to the theoretical formula (or FPU implementation).
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Template parameters:
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- NC: number of coefficients, > 0
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--- Legal stuff ---
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This program is free software. It comes without any warranty, to
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the extent permitted by applicable law. You can redistribute it
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and/or modify it under the terms of the Do What The Fuck You Want
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To Public License, Version 2, as published by Sam Hocevar. See
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http://sam.zoy.org/wtfpl/COPYING for more details.
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*Tab=3***********************************************************************/
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#pragma once
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#if ! defined (hiir_Upsampler2xNeon_HEADER_INCLUDED)
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#define hiir_Upsampler2xNeon_HEADER_INCLUDED
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#if defined (_MSC_VER)
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#pragma warning (4 : 4250)
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#endif
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/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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#include "hiir/StageDataNeon.h"
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#include <array>
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namespace hiir
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{
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template <int NC>
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class Upsampler2xNeon
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{
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static_assert ((NC > 0), "Number of coefficient must be positive.");
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/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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public:
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enum { NBR_COEFS = NC };
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Upsampler2xNeon ();
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Upsampler2xNeon (const Upsampler2xNeon &other) = default;
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Upsampler2xNeon &
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operator = (const Upsampler2xNeon &other) = default;
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void set_coefs (const double coef_arr [NBR_COEFS]);
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inline void process_sample (float &out_0, float &out_1, float input);
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void process_block (float out_ptr [], const float in_ptr [], long nbr_spl);
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void clear_buffers ();
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/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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protected:
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/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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private:
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enum { STAGE_WIDTH = 4 };
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enum { NBR_STAGES = (NBR_COEFS + STAGE_WIDTH - 1) / STAGE_WIDTH };
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typedef std::array <StageDataNeon, NBR_STAGES + 1> Filter; // Stage 0 contains only input memory
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Filter _filter; // Should be the first member (thus easier to align)
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/*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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private:
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bool operator == (const Upsampler2xNeon <NC> &other) const = delete;
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bool operator != (const Upsampler2xNeon <NC> &other) const = delete;
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}; // class Upsampler2xNeon
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} // namespace hiir
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#include "hiir/Upsampler2xNeon.hpp"
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#endif // hiir_Upsampler2xNeon_HEADER_INCLUDED
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/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
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