mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2026-11-06 13:28:17 +00:00
Patryk Darmofalski
d943d90925
vector_clip_int32 is based on the 32-bit ARM NEON version. Unrolling to 16 or 32 elements per iteration gave no measurable improvement over 8. vector_clipf applies fmin before fmaxnm, so any NaN input, including a signaling one, yields min as in C and as documented for av_clipf. checkasm --bench on Apple M4: vector_clip_int32_c: 1029.6 vector_clip_int32_neon: 180.7 ( 5.38x) vector_clipf_c: 682.9 vector_clipf_neon: 190.8 ( 3.34x) Signed-off-by: Patryk Darmofalski <darpat039@gmail.com>
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "audiodsp.h"
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static void vector_clipf_c(float *dst, const float *src, int len,
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float min, float max)
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{
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for (int i = 0; i < len; i += 8) {
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float tmp[8];
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for (int j = 0; j < 8; j++)
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tmp[j]= av_clipf(src[i + j], min, max);
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for (int j = 0; j < 8; j++)
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dst[i + j] = tmp[j];
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}
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}
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static int32_t scalarproduct_int16_c(const int16_t *v1, const int16_t *v2,
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int order)
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{
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unsigned res = 0;
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while (order--)
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res += *v1++ **v2++;
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return res;
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}
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static void vector_clip_int32_c(int32_t *dst, const int32_t *src, int32_t min,
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int32_t max, unsigned int len)
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{
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do {
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*dst++ = av_clip(*src++, min, max);
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*dst++ = av_clip(*src++, min, max);
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*dst++ = av_clip(*src++, min, max);
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*dst++ = av_clip(*src++, min, max);
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*dst++ = av_clip(*src++, min, max);
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*dst++ = av_clip(*src++, min, max);
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*dst++ = av_clip(*src++, min, max);
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*dst++ = av_clip(*src++, min, max);
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len -= 8;
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} while (len > 0);
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}
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av_cold void ff_audiodsp_init(AudioDSPContext *c)
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{
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c->scalarproduct_int16 = scalarproduct_int16_c;
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c->vector_clip_int32 = vector_clip_int32_c;
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c->vector_clipf = vector_clipf_c;
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#if ARCH_AARCH64
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ff_audiodsp_init_aarch64(c);
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#elif ARCH_ARM
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ff_audiodsp_init_arm(c);
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#elif ARCH_PPC
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ff_audiodsp_init_ppc(c);
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#elif ARCH_RISCV
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ff_audiodsp_init_riscv(c);
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#elif ARCH_X86 && HAVE_X86ASM
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ff_audiodsp_init_x86(c);
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#endif
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}
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