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FFmpeg/libavcodec/riscv/pixblockdsp_init.c
Rémi Denis-Courmont 02594c8c01 lavc/pixblockdsp: rework R-V V get_pixels_unaligned
As in the aligned case, we can use VLSE64.V, though the way of doing so
gets more convoluted, so the performance gains are more modest:

get_pixels_unaligned_c:       126.7
get_pixels_unaligned_rvv_i32: 145.5 (before)
get_pixels_unaligned_rvv_i64:  62.2 (after)

For the reference, those are the aligned benchmarks (unchanged) on the
same T-Head C908 hardware:

get_pixels_c:                 126.7
get_pixels_rvi:                85.7
get_pixels_rvv_i64:            33.2
2023-11-06 19:42:49 +02:00

73 lines
2.6 KiB
C

/*
* 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 "config.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/riscv/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);
void ff_get_pixels_8_rvv(int16_t *block, const uint8_t *pixels,
ptrdiff_t stride);
void ff_get_pixels_unaligned_8_rvv(int16_t *block, const uint8_t *pixels,
ptrdiff_t stride);
void ff_diff_pixels_rvv(int16_t *block, const uint8_t *s1,
const uint8_t *s2, ptrdiff_t stride);
void ff_diff_pixels_unaligned_rvv(int16_t *block, const uint8_t *s1,
const uint8_t *s2, 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;
}
#if HAVE_RVV
if ((cpu_flags & AV_CPU_FLAG_RVV_I32) && ff_get_rv_vlenb() >= 16) {
c->diff_pixels = ff_diff_pixels_unaligned_rvv;
c->diff_pixels_unaligned = ff_diff_pixels_unaligned_rvv;
}
if ((cpu_flags & AV_CPU_FLAG_RVV_I64) && ff_get_rv_vlenb() >= 16) {
if (!high_bit_depth) {
c->get_pixels = ff_get_pixels_8_rvv;
c->get_pixels_unaligned = ff_get_pixels_unaligned_8_rvv;
}
c->diff_pixels = ff_diff_pixels_rvv;
}
#endif
}