[FFmpeg-devel] [PATCH 6/6][BROKEN] avfilter/vf_nlmeans: add x86 SIMD

[Paul B Mahol]

Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
 libavfilter/vf_nlmeans.c       |  3 ++
 libavfilter/vf_nlmeans.h       |  1 +
 libavfilter/x86/Makefile       |  2 +
 libavfilter/x86/vf_nlmeans.asm | 89 ++++++++++++++++++++++++++++++++++
 4 files changed, 95 insertions(+)
 create mode 100644 libavfilter/x86/vf_nlmeans.asm

diff --git a/libavfilter/vf_nlmeans.c b/libavfilter/vf_nlmeans.c
index 93a14bcf19..16171d830a 100644
--- a/libavfilter/vf_nlmeans.c
+++ b/libavfilter/vf_nlmeans.c
@@ -513,6 +513,9 @@ void ff_nlmeans_init(NLMeansDSPContext *dsp)
 
     if (ARCH_AARCH64)
         ff_nlmeans_init_aarch64(dsp);
+
+    if (ARCH_X86)
+        ff_nlmeans_init_x86(dsp);
 }
 
 static av_cold int init(AVFilterContext *ctx)
diff --git a/libavfilter/vf_nlmeans.h b/libavfilter/vf_nlmeans.h
index d0d0056163..ae9f450dbf 100644
--- a/libavfilter/vf_nlmeans.h
+++ b/libavfilter/vf_nlmeans.h
@@ -45,5 +45,6 @@ typedef struct NLMeansDSPContext {
 
 void ff_nlmeans_init(NLMeansDSPContext *dsp);
 void ff_nlmeans_init_aarch64(NLMeansDSPContext *dsp);
+void ff_nlmeans_init_x86(NLMeansDSPContext *dsp);
 
 #endif /* AVFILTER_NLMEANS_H */
diff --git a/libavfilter/x86/Makefile b/libavfilter/x86/Makefile
index a29941eaeb..e87481bd7a 100644
--- a/libavfilter/x86/Makefile
+++ b/libavfilter/x86/Makefile
@@ -20,6 +20,7 @@ OBJS-$(CONFIG_LIMITER_FILTER)                += x86/vf_limiter_init.o
 OBJS-$(CONFIG_LUT3D_FILTER)                  += x86/vf_lut3d_init.o
 OBJS-$(CONFIG_MASKEDCLAMP_FILTER)            += x86/vf_maskedclamp_init.o
 OBJS-$(CONFIG_MASKEDMERGE_FILTER)            += x86/vf_maskedmerge_init.o
+OBJS-$(CONFIG_NLMEANS_FILTER)                += x86/vf_nlmeans_init.o
 OBJS-$(CONFIG_NOISE_FILTER)                  += x86/vf_noise.o
 OBJS-$(CONFIG_OVERLAY_FILTER)                += x86/vf_overlay_init.o
 OBJS-$(CONFIG_PP7_FILTER)                    += x86/vf_pp7_init.o
@@ -61,6 +62,7 @@ X86ASM-OBJS-$(CONFIG_LIMITER_FILTER)         += x86/vf_limiter.o
 X86ASM-OBJS-$(CONFIG_LUT3D_FILTER)           += x86/vf_lut3d.o
 X86ASM-OBJS-$(CONFIG_MASKEDCLAMP_FILTER)     += x86/vf_maskedclamp.o
 X86ASM-OBJS-$(CONFIG_MASKEDMERGE_FILTER)     += x86/vf_maskedmerge.o
+X86ASM-OBJS-$(CONFIG_NLMEANS_FILTER)         += x86/vf_nlmeans.o
 X86ASM-OBJS-$(CONFIG_OVERLAY_FILTER)         += x86/vf_overlay.o
 X86ASM-OBJS-$(CONFIG_PP7_FILTER)             += x86/vf_pp7.o
 X86ASM-OBJS-$(CONFIG_PSNR_FILTER)            += x86/vf_psnr.o
diff --git a/libavfilter/x86/vf_nlmeans.asm b/libavfilter/x86/vf_nlmeans.asm
new file mode 100644
index 0000000000..aebcc59b54
--- /dev/null
+++ b/libavfilter/x86/vf_nlmeans.asm
@@ -0,0 +1,89 @@
+;*****************************************************************************
+;* x86-optimized functions for nlmeans filter
+;*
+;* 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/x86/x86util.asm"
+
+%if HAVE_AVX2_EXTERNAL
+
+SECTION_RODATA
+
+SECTION .text
+
+; void ff_compute_weights_line(const uint32_t *const iia,
+;                              const uint32_t *const iib,
+;                              const uint32_t *const iid,
+;                              const uint32_t *const iie,
+;                              const uint8_t *const src,
+;                              struct weighted_avg *wa,
+;                              const float *const lut,
+;                              int max,
+;                              int startx, int endx);
+
+INIT_YMM avx2
+cglobal compute_weights_line, 11, 11, 7, iia, iib, iid, iie, src, wa, lut, max, startx, endx, x
+    movsxdifnidn startxq, startxd
+    movsxdifnidn   endxq, endxd
+    movsxdifnidn    maxq, maxd
+
+    sal          startxq, 2
+    sal            endxq, 2
+
+    mov               xq, startxq
+    sar          startxq, 2
+    VBROADCASTI128    m4, maxm
+    pcmpeqd           m5, m5
+
+    .loop:
+        movu  m0, [iieq + xq]
+        movu  m1, [iidq + xq]
+        movu  m2, [iibq + xq]
+        movu  m3, [iiaq + xq]
+        vpmovzxbd  m6, [srcq + startxq]
+        vcvtdq2ps m6, m6
+
+        psubd  m0, m1
+        psubd  m0, m2
+        paddd  m0, m3
+        pminud m0, m4
+        pslld  m0, 2
+        mova   m3, m5
+        vpgatherdd m1, [lutq + m0], m3
+
+        vmulps    m2, m1, m6
+        vunpcklps m0, m1, m2
+        vunpckhps m1, m1, m2
+
+        movu m2, [waq + xq * 2]
+        movu m3, [waq + xq * 2 + 4 * 4]
+
+        vaddps m0, m2
+        vaddps m1, m3
+
+        movu [waq + xq * 2], m0
+        movu [waq + xq * 2 + 4 * 4], m1
+
+        add startxq, 1 * 4
+        add xq, 4 * 4
+        cmp xq, endxq
+        jl .loop
+    RET
+
+%endif
-- 
2.33.0