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424c74d006
Remove the paragraph about writing to the Free Software Foundation's mailing address. The FSF has changed addresses in the past, and may do so again. In 2021 this is not useful, let's rather have a bit less boilerplate at the start of source files. Change-Id: I8ba71ab9ccde4ba25151ecbeb2a323f706b57d43
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* NEON type conversions
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* Copyright (C) 2012, 2013 Thomas Tsou <tom@tsou.cc>
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*/
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#include <malloc.h>
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#include <string.h>
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#include "convert.h"
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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void neon_convert_ps_si16_4n(short *, const float *, const float *, int);
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void neon_convert_si16_ps_4n(float *, const short *, int);
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void convert_init(void) {
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}
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/* 4*N 16-bit signed integer conversion with remainder */
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static void neon_convert_si16_ps(float *out,
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const short *in,
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int len)
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{
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int start = len / 4 * 4;
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neon_convert_si16_ps_4n(out, in, len >> 2);
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for (int i = 0; i < len % 4; i++)
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out[start + i] = (float) in[start + i];
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}
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/* 4*N 16-bit signed integer conversion with remainder */
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static void neon_convert_ps_si16(short *out,
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const float *in,
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const float *scale,
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int len)
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{
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int start = len / 4 * 4;
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neon_convert_ps_si16_4n(out, in, scale, len >> 2);
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for (int i = 0; i < len % 4; i++)
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out[start + i] = (short) (in[start + i] * (*scale));
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}
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void convert_float_short(short *out, const float *in, float scale, int len)
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{
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#ifdef HAVE_NEON
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float q[4] = { scale, scale, scale, scale };
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if (len % 4)
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neon_convert_ps_si16(out, in, q, len);
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else
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neon_convert_ps_si16_4n(out, in, q, len >> 2);
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#else
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base_convert_float_short(out, in, scale, len);
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#endif
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}
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void convert_short_float(float *out, const short *in, int len)
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{
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#ifdef HAVE_NEON
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if (len % 4)
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neon_convert_si16_ps(out, in, len);
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else
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neon_convert_si16_ps_4n(out, in, len >> 2);
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#else
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base_convert_short_float(out, in, len);
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#endif
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}
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