From: Zhao Zhili <quinkblack-at-foxmail.com@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Cc: Zhao Zhili <zhilizhao@tencent.com>
Subject: [FFmpeg-devel] [PATCH 1/2] wasm/hevc: Add sao_band_filter
Date: Sat, 7 Jun 2025 18:18:11 +0800
Message-ID: <tencent_44DE2A891328DC528B8E2621508DA6F0A706@qq.com> (raw)
From: Zhao Zhili <zhilizhao@tencent.com>
hevc_sao_band_8_8_c: 63.0 ( 1.00x)
hevc_sao_band_8_8_simd128: 10.4 ( 6.06x)
hevc_sao_band_16_8_c: 230.4 ( 1.00x)
hevc_sao_band_16_8_simd128: 22.9 (10.07x)
hevc_sao_band_32_8_c: 900.4 ( 1.00x)
hevc_sao_band_32_8_simd128: 81.5 (11.05x)
hevc_sao_band_48_8_c: 2009.1 ( 1.00x)
hevc_sao_band_48_8_simd128: 170.2 (11.80x)
hevc_sao_band_64_8_c: 3535.0 ( 1.00x)
hevc_sao_band_64_8_simd128: 297.5 (11.88x)
Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
---
libavcodec/wasm/hevc/Makefile | 3 +-
libavcodec/wasm/hevc/dsp_init.c | 7 ++
libavcodec/wasm/hevc/sao.c | 113 ++++++++++++++++++++++++++++++++
libavcodec/wasm/hevc/sao.h | 41 ++++++++++++
4 files changed, 163 insertions(+), 1 deletion(-)
create mode 100644 libavcodec/wasm/hevc/sao.c
create mode 100644 libavcodec/wasm/hevc/sao.h
diff --git a/libavcodec/wasm/hevc/Makefile b/libavcodec/wasm/hevc/Makefile
index 132daa3106..7e8ab3776e 100644
--- a/libavcodec/wasm/hevc/Makefile
+++ b/libavcodec/wasm/hevc/Makefile
@@ -1,3 +1,4 @@
OBJS-$(CONFIG_HEVC_DECODER) += wasm/hevc/dsp_init.o
-SIMD128-OBJS-$(CONFIG_HEVC_DECODER) += wasm/hevc/idct.o
+SIMD128-OBJS-$(CONFIG_HEVC_DECODER) += wasm/hevc/idct.o \
+ wasm/hevc/sao.o
diff --git a/libavcodec/wasm/hevc/dsp_init.c b/libavcodec/wasm/hevc/dsp_init.c
index e5c8a2ebb6..76a1031ff4 100644
--- a/libavcodec/wasm/hevc/dsp_init.c
+++ b/libavcodec/wasm/hevc/dsp_init.c
@@ -21,6 +21,7 @@
#include "libavutil/cpu_internal.h"
#include "libavcodec/hevc/dsp.h"
#include "libavcodec/wasm/hevc/idct.h"
+#include "libavcodec/wasm/hevc/sao.h"
av_cold void ff_hevc_dsp_init_wasm(HEVCDSPContext *c, const int bit_depth)
{
@@ -35,6 +36,12 @@ av_cold void ff_hevc_dsp_init_wasm(HEVCDSPContext *c, const int bit_depth)
c->idct[1] = ff_hevc_idct_8x8_8_simd128;
c->idct[2] = ff_hevc_idct_16x16_8_simd128;
c->idct[3] = ff_hevc_idct_32x32_8_simd128;
+
+ c->sao_band_filter[0] = ff_hevc_sao_band_filter_8x8_8_simd128;
+ c->sao_band_filter[1] =
+ c->sao_band_filter[2] =
+ c->sao_band_filter[3] =
+ c->sao_band_filter[4] = ff_hevc_sao_band_filter_16x16_8_simd128;
} else if (bit_depth == 10) {
c->idct[0] = ff_hevc_idct_4x4_10_simd128;
c->idct[1] = ff_hevc_idct_8x8_10_simd128;
diff --git a/libavcodec/wasm/hevc/sao.c b/libavcodec/wasm/hevc/sao.c
new file mode 100644
index 0000000000..82134af7f3
--- /dev/null
+++ b/libavcodec/wasm/hevc/sao.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2025 Zhao Zhili
+ *
+ * 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 "sao.h"
+
+#include <wasm_simd128.h>
+
+void ff_hevc_sao_band_filter_8x8_8_simd128(uint8_t *dst, const uint8_t *src,
+ ptrdiff_t stride_dst,
+ ptrdiff_t stride_src,
+ const int16_t *sao_offset_val,
+ int sao_left_class, int width,
+ int height)
+{
+ int8_t offset_table[32] = {0};
+ v128_t offset_low, offset_high;
+
+ for (int k = 0; k < 4; k++)
+ offset_table[(k + sao_left_class) & 31] = (int8_t)sao_offset_val[k + 1];
+
+ offset_low = wasm_v128_load(offset_table);
+ offset_high = wasm_v128_load(&offset_table[16]);
+
+ for (int y = height; y > 0; y -= 2) {
+ v128_t src_v, src_high;
+ v128_t v0, v1;
+
+ src_v = wasm_v128_load64_zero(src);
+ src += stride_src;
+ src_v = wasm_v128_load64_lane(src, src_v, 1);
+ src += stride_src;
+
+ v0 = wasm_u8x16_shr(src_v, 3);
+ v1 = wasm_i8x16_sub(v0, wasm_i8x16_const_splat(16));
+ v0 = wasm_i8x16_swizzle(offset_low, v0);
+ v1 = wasm_i8x16_swizzle(offset_high, v1);
+ v0 = wasm_v128_or(v0, v1);
+ src_high = wasm_u16x8_extend_high_u8x16(src_v);
+ v1 = wasm_i16x8_extend_high_i8x16(v0);
+ src_v = wasm_u16x8_extend_low_u8x16(src_v);
+ v0 = wasm_i16x8_extend_low_i8x16(v0);
+
+ v0 = wasm_i16x8_add_sat(src_v, v0);
+ v1 = wasm_i16x8_add_sat(src_high, v1);
+ v0 = wasm_u8x16_narrow_i16x8(v0, v1);
+
+ wasm_v128_store64_lane(dst, v0, 0);
+ dst += stride_dst;
+ wasm_v128_store64_lane(dst, v0, 1);
+ dst += stride_dst;
+ }
+}
+
+void ff_hevc_sao_band_filter_16x16_8_simd128(uint8_t *dst, const uint8_t *src,
+ ptrdiff_t stride_dst,
+ ptrdiff_t stride_src,
+ const int16_t *sao_offset_val,
+ int sao_left_class, int width,
+ int height)
+{
+ int8_t offset_table[32] = {0};
+ v128_t offset_low, offset_high;
+
+ for (int k = 0; k < 4; k++)
+ offset_table[(k + sao_left_class) & 31] = (int8_t)sao_offset_val[k + 1];
+
+ offset_low = wasm_v128_load(offset_table);
+ offset_high = wasm_v128_load(&offset_table[16]);
+
+ for (int y = height; y > 0; y--) {
+ for (int x = 0; x < width; x += 16) {
+ v128_t src_v, src_high;
+ v128_t v0, v1;
+
+ src_v = wasm_v128_load(&src[x]);
+
+ v0 = wasm_u8x16_shr(src_v, 3);
+ v1 = wasm_i8x16_sub(v0, wasm_i8x16_const_splat(16));
+ v0 = wasm_i8x16_swizzle(offset_low, v0);
+ v1 = wasm_i8x16_swizzle(offset_high, v1);
+ v0 = wasm_v128_or(v0, v1);
+ src_high = wasm_u16x8_extend_high_u8x16(src_v);
+ v1 = wasm_i16x8_extend_high_i8x16(v0);
+ src_v = wasm_u16x8_extend_low_u8x16(src_v);
+ v0 = wasm_i16x8_extend_low_i8x16(v0);
+
+ v0 = wasm_i16x8_add_sat(src_v, v0);
+ v1 = wasm_i16x8_add_sat(src_high, v1);
+ v0 = wasm_u8x16_narrow_i16x8(v0, v1);
+ wasm_v128_store(&dst[x], v0);
+ }
+
+ dst += stride_dst;
+ src += stride_src;
+ }
+}
diff --git a/libavcodec/wasm/hevc/sao.h b/libavcodec/wasm/hevc/sao.h
new file mode 100644
index 0000000000..6119ec90f1
--- /dev/null
+++ b/libavcodec/wasm/hevc/sao.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2025 Zhao Zhili
+ *
+ * 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
+ */
+
+#ifndef AVCODEC_WASM_HEVC_SAO_H
+#define AVCODEC_WASM_HEVC_SAO_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+void ff_hevc_sao_band_filter_8x8_8_simd128(uint8_t *_dst, const uint8_t *_src,
+ ptrdiff_t _stride_dst,
+ ptrdiff_t _stride_src,
+ const int16_t *sao_offset_val,
+ int sao_left_class, int width,
+ int height);
+
+void ff_hevc_sao_band_filter_16x16_8_simd128(uint8_t *_dst, const uint8_t *_src,
+ ptrdiff_t _stride_dst,
+ ptrdiff_t _stride_src,
+ const int16_t *sao_offset_val,
+ int sao_left_class, int width,
+ int height);
+
+#endif
\ No newline at end of file
--
2.43.0
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