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libavcodec: aarch64: Add a NEON implementation of pixblockdsp 

Cortex A53    A72    A73
get_pixels_c:                140.7   87.7   72.5
get_pixels_neon:              46.0   20.0   19.5
get_pixels_unaligned_c:      140.7   87.7   73.0
get_pixels_unaligned_neon:    49.2   20.2   26.2
diff_pixels_c:               209.7  133.7  138.7
diff_pixels_neon:             54.2   31.7   23.5
diff_pixels_unaligned_c:     209.7  134.2  139.0
diff_pixels_unaligned_neon:   68.0   27.7   41.7

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2020-05-13 14:08:58 +03:00
parent b252178321
commit 7168adedbc
5 changed files with 103 additions and 0 deletions
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2
libavcodec/aarch64/Makefile
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@ -9,6 +9,7 @@ OBJS-$(CONFIG_HPELDSP) += aarch64/hpeldsp_init_aarch64.o
OBJS-$(CONFIG_IDCTDSP) += aarch64/idctdsp_init_aarch64.o
OBJS-$(CONFIG_MPEGAUDIODSP) += aarch64/mpegaudiodsp_init.o
OBJS-$(CONFIG_NEON_CLOBBER_TEST) += aarch64/neontest.o
OBJS-$(CONFIG_PIXBLOCKDSP) += aarch64/pixblockdsp_init_aarch64.o
OBJS-$(CONFIG_VIDEODSP) += aarch64/videodsp_init.o
OBJS-$(CONFIG_VP8DSP) += aarch64/vp8dsp_init_aarch64.o
@ -46,6 +47,7 @@ NEON-OBJS-$(CONFIG_HPELDSP) += aarch64/hpeldsp_neon.o
NEON-OBJS-$(CONFIG_IDCTDSP) += aarch64/simple_idct_neon.o
NEON-OBJS-$(CONFIG_MDCT) += aarch64/mdct_neon.o
NEON-OBJS-$(CONFIG_MPEGAUDIODSP) += aarch64/mpegaudiodsp_neon.o
NEON-OBJS-$(CONFIG_PIXBLOCKDSP) += aarch64/pixblockdsp_neon.o
NEON-OBJS-$(CONFIG_VP8DSP) += aarch64/vp8dsp_neon.o
# decoders/encoders

46
libavcodec/aarch64/pixblockdsp_init_aarch64.c Normal file
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@ -0,0 +1,46 @@
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/aarch64/cpu.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/pixblockdsp.h"
void ff_get_pixels_neon(int16_t *block, const uint8_t *pixels,
ptrdiff_t stride);
void ff_diff_pixels_neon(int16_t *block, const uint8_t *s1,
const uint8_t *s2, ptrdiff_t stride);
av_cold void ff_pixblockdsp_init_aarch64(PixblockDSPContext *c,
AVCodecContext *avctx,
unsigned high_bit_depth)
{
int cpu_flags = av_get_cpu_flags();
if (have_neon(cpu_flags)) {
if (!high_bit_depth) {
c->get_pixels_unaligned =
c->get_pixels = ff_get_pixels_neon;
}
c->diff_pixels_unaligned =
c->diff_pixels = ff_diff_pixels_neon;
}
}

51
libavcodec/aarch64/pixblockdsp_neon.S Normal file
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@ -0,0 +1,51 @@
/*
* Copyright (c) 2020 Martin Storsjo
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/aarch64/asm.S"
function ff_get_pixels_neon, export=1
mov w3, #8
1:
ld1 {v0.8b}, [x1], x2
subs w3, w3, #2
ld1 {v1.8b}, [x1], x2
uxtl v0.8h, v0.8b
uxtl v1.8h, v1.8b
st1 {v0.8h, v1.8h}, [x0], #32
b.gt 1b
ret
endfunc
function ff_diff_pixels_neon, export=1
mov w4, #8
1:
ld1 {v0.8b}, [x1], x3
ld1 {v1.8b}, [x2], x3
subs w4, w4, #2
ld1 {v2.8b}, [x1], x3
usubl v0.8h, v0.8b, v1.8b
ld1 {v3.8b}, [x2], x3
usubl v1.8h, v2.8b, v3.8b
st1 {v0.8h, v1.8h}, [x0], #32
b.gt 1b
ret
endfunc

2
libavcodec/pixblockdsp.c
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@ -101,6 +101,8 @@ av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
break;
}
if (ARCH_AARCH64)
ff_pixblockdsp_init_aarch64(c, avctx, high_bit_depth);
if (ARCH_ALPHA)
ff_pixblockdsp_init_alpha(c, avctx, high_bit_depth);
if (ARCH_ARM)

2
libavcodec/pixblockdsp.h
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@ -44,6 +44,8 @@ typedef struct PixblockDSPContext {
} PixblockDSPContext;
void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx);
void ff_pixblockdsp_init_aarch64(PixblockDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth);
void ff_pixblockdsp_init_alpha(PixblockDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth);
void ff_pixblockdsp_init_arm(PixblockDSPContext *c, AVCodecContext *avctx,