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Code Issues Releases Activity

lavc/pixblockdsp: RISC-V I get_pixels

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Benchmarks on SiFive U74-MC (courtesy of Shanghai StarFive Tech):
get_pixels_c: 180.0
get_pixels_rvi: 136.7
This commit is contained in:
Rémi Denis-Courmont
2022-09-26 17:52:24 +03:00
committed by Lynne
parent 04d092e7d5
commit 1edac8eb46
5 changed files with 110 additions and 0 deletions
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2
libavcodec/pixblockdsp.c
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@@ -109,6 +109,8 @@ av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
ff_pixblockdsp_init_arm(c, avctx, high_bit_depth);
#elif ARCH_PPC
ff_pixblockdsp_init_ppc(c, avctx, high_bit_depth);
#elif ARCH_RISCV
ff_pixblockdsp_init_riscv(c, avctx, high_bit_depth);
#elif ARCH_X86
ff_pixblockdsp_init_x86(c, avctx, high_bit_depth);
#elif ARCH_MIPS

2
libavcodec/pixblockdsp.h
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@@ -52,6 +52,8 @@ void ff_pixblockdsp_init_arm(PixblockDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth);
void ff_pixblockdsp_init_ppc(PixblockDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth);
void ff_pixblockdsp_init_riscv(PixblockDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth);
void ff_pixblockdsp_init_x86(PixblockDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth);
void ff_pixblockdsp_init_mips(PixblockDSPContext *c, AVCodecContext *avctx,

2
libavcodec/riscv/Makefile
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@@ -1,2 +1,4 @@
OBJS-$(CONFIG_AUDIODSP) += riscv/audiodsp_init.o \
riscv/audiodsp_rvf.o
OBJS-$(CONFIG_PIXBLOCKDSP) += riscv/pixblockdsp_init.o \
riscv/pixblockdsp_rvi.o

45
libavcodec/riscv/pixblockdsp_init.c Normal file
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@@ -0,0 +1,45 @@
/*
* Copyright © 2022 Rémi Denis-Courmont.
*
* 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 "libavcodec/avcodec.h"
#include "libavcodec/pixblockdsp.h"
void ff_get_pixels_8_rvi(int16_t *block, const uint8_t *pixels,
ptrdiff_t stride);
void ff_get_pixels_16_rvi(int16_t *block, const uint8_t *pixels,
ptrdiff_t stride);
av_cold void ff_pixblockdsp_init_riscv(PixblockDSPContext *c,
AVCodecContext *avctx,
unsigned high_bit_depth)
{
int cpu_flags = av_get_cpu_flags();
if (cpu_flags & AV_CPU_FLAG_RVI) {
if (high_bit_depth)
c->get_pixels = ff_get_pixels_16_rvi;
else
c->get_pixels = ff_get_pixels_8_rvi;
}
}

59
libavcodec/riscv/pixblockdsp_rvi.S Normal file
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@@ -0,0 +1,59 @@
/*
* Copyright © 2022 Rémi Denis-Courmont.
*
* 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 "config.h"
#include "../libavutil/riscv/asm.S"
func ff_get_pixels_8_rvi
.irp row, 0, 1, 2, 3, 4, 5, 6, 7
ld t0, (a1)
add a1, a1, a2
sd zero, ((\row * 16) + 0)(a0)
addi t6, t6, -1
sd zero, ((\row * 16) + 8)(a0)
srli t1, t0, 8
sb t0, ((\row * 16) + 0)(a0)
srli t2, t0, 16
sb t1, ((\row * 16) + 2)(a0)
srli t3, t0, 24
sb t2, ((\row * 16) + 4)(a0)
srli t4, t0, 32
sb t3, ((\row * 16) + 6)(a0)
srli t1, t0, 40
sb t4, ((\row * 16) + 8)(a0)
srli t2, t0, 48
sb t1, ((\row * 16) + 10)(a0)
srli t3, t0, 56
sb t2, ((\row * 16) + 12)(a0)
sb t3, ((\row * 16) + 14)(a0)
.endr
ret
endfunc
func ff_get_pixels_16_rvi
.irp row, 0, 1, 2, 3, 4, 5, 6, 7
ld t0, 0(a1)
ld t1, 8(a1)
add a1, a1, a2
sd t0, ((\row * 16) + 0)(a0)
sd t1, ((\row * 16) + 8)(a0)
.endr
ret
endfunc