🛠️🐜 Antkeeper superbuild with dependencies included
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
3.2 KiB
85 lines
3.2 KiB
/**
|
|
* OpenAL cross platform audio library
|
|
* Copyright (C) 2014 by Timothy Arceri <t_arceri@yahoo.com.au>.
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
* Or go to http://www.gnu.org/copyleft/lgpl.html
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <xmmintrin.h>
|
|
#include <emmintrin.h>
|
|
|
|
#include "alu.h"
|
|
#include "defs.h"
|
|
|
|
|
|
template<>
|
|
const ALfloat *Resample_<LerpTag,SSE2Tag>(const InterpState* UNUSED(state),
|
|
const ALfloat *RESTRICT src, ALsizei frac, ALint increment,
|
|
ALfloat *RESTRICT dst, ALsizei dstlen)
|
|
{
|
|
const __m128i increment4{_mm_set1_epi32(increment*4)};
|
|
const __m128 fracOne4{_mm_set1_ps(1.0f/FRACTIONONE)};
|
|
const __m128i fracMask4{_mm_set1_epi32(FRACTIONMASK)};
|
|
|
|
ASSUME(frac > 0);
|
|
ASSUME(increment > 0);
|
|
ASSUME(dstlen >= 0);
|
|
|
|
alignas(16) ALsizei pos_[4], frac_[4];
|
|
InitiatePositionArrays(frac, increment, frac_, pos_, 4);
|
|
__m128i frac4{_mm_setr_epi32(frac_[0], frac_[1], frac_[2], frac_[3])};
|
|
__m128i pos4{_mm_setr_epi32(pos_[0], pos_[1], pos_[2], pos_[3])};
|
|
|
|
const ALsizei todo{dstlen & ~3};
|
|
for(ALsizei i{0};i < todo;i += 4)
|
|
{
|
|
const int pos0{_mm_cvtsi128_si32(_mm_shuffle_epi32(pos4, _MM_SHUFFLE(0, 0, 0, 0)))};
|
|
const int pos1{_mm_cvtsi128_si32(_mm_shuffle_epi32(pos4, _MM_SHUFFLE(1, 1, 1, 1)))};
|
|
const int pos2{_mm_cvtsi128_si32(_mm_shuffle_epi32(pos4, _MM_SHUFFLE(2, 2, 2, 2)))};
|
|
const int pos3{_mm_cvtsi128_si32(_mm_shuffle_epi32(pos4, _MM_SHUFFLE(3, 3, 3, 3)))};
|
|
const __m128 val1{_mm_setr_ps(src[pos0 ], src[pos1 ], src[pos2 ], src[pos3 ])};
|
|
const __m128 val2{_mm_setr_ps(src[pos0+1], src[pos1+1], src[pos2+1], src[pos3+1])};
|
|
|
|
/* val1 + (val2-val1)*mu */
|
|
const __m128 r0{_mm_sub_ps(val2, val1)};
|
|
const __m128 mu{_mm_mul_ps(_mm_cvtepi32_ps(frac4), fracOne4)};
|
|
const __m128 out{_mm_add_ps(val1, _mm_mul_ps(mu, r0))};
|
|
|
|
_mm_store_ps(&dst[i], out);
|
|
|
|
frac4 = _mm_add_epi32(frac4, increment4);
|
|
pos4 = _mm_add_epi32(pos4, _mm_srli_epi32(frac4, FRACTIONBITS));
|
|
frac4 = _mm_and_si128(frac4, fracMask4);
|
|
}
|
|
|
|
/* NOTE: These four elements represent the position *after* the last four
|
|
* samples, so the lowest element is the next position to resample.
|
|
*/
|
|
ALsizei pos{_mm_cvtsi128_si32(pos4)};
|
|
frac = _mm_cvtsi128_si32(frac4);
|
|
|
|
for(ALsizei i{todo};i < dstlen;++i)
|
|
{
|
|
dst[i] = lerp(src[pos], src[pos+1], frac * (1.0f/FRACTIONONE));
|
|
|
|
frac += increment;
|
|
pos += frac>>FRACTIONBITS;
|
|
frac &= FRACTIONMASK;
|
|
}
|
|
return dst;
|
|
}
|