avfilter/vf_nlmeans: add x86 SIMD

3 files changed, 139 insertions, 0 deletions

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..8f57801035
--- /dev/null
+++ b/libavfilter/x86/vf_nlmeans.asm
@@ -0,0 +1,97 @@
+;*****************************************************************************
+;* 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 && ARCH_X86_64
+
+SECTION_RODATA 32
+
+ending_lut: dd -1, -1, -1, -1, -1, -1, -1, -1,\
+                0, -1, -1, -1, -1, -1, -1, -1,\
+                0,  0, -1, -1, -1, -1, -1, -1,\
+                0,  0,  0, -1, -1, -1, -1, -1,\
+                0,  0,  0,  0, -1, -1, -1, -1,\
+                0,  0,  0,  0,  0, -1, -1, -1,\
+                0,  0,  0,  0,  0,  0, -1, -1,\
+                0,  0,  0,  0,  0,  0,  0, -1,\
+                0,  0,  0,  0,  0,  0,  0,  0
+
+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,
+;                              float *total,
+;                              float *sum,
+;                              const float *const lut,
+;                              int max,
+;                              int startx, int endx);
+
+INIT_YMM avx2
+cglobal compute_weights_line, 8, 13, 5, 0, iia, iib, iid, iie, src, total, sum, lut, x, startx, endx, mod, elut
+    movsxd startxq, dword startxm
+    movsxd   endxq, dword endxm
+    VPBROADCASTD      m2, r8m
+
+    mov      xq, startxq
+    mov    modq, mmsize / 4
+    lea   elutq, [ending_lut]
+
+    vpcmpeqd  m4, m4
+
+    .loop:
+        mov    startxq, endxq
+        sub    startxq, xq
+        cmp    startxq, modq
+        cmovge startxq, modq
+        sal    startxq, 5
+
+        movu   m0, [iieq + xq * 4]
+
+        psubd  m0, [iidq + xq * 4]
+        psubd  m0, [iibq + xq * 4]
+        paddd  m0, [iiaq + xq * 4]
+        por    m0, [elutq + startxq]
+        pminud m0, m2
+        pslld  m0, 2
+        mova   m3, m4
+        vgatherdps m1, [lutq + m0], m3
+
+        pmovzxbd m0, [srcq + xq]
+        cvtdq2ps m0, m0
+
+        mulps m0, m1
+
+        addps m1, [totalq + xq * 4]
+        addps m0, [sumq + xq * 4]
+
+        movups [totalq + xq * 4], m1
+        movups [sumq + xq * 4], m0
+
+        add xq, mmsize / 4
+        cmp xq, endxq
+        jl .loop
+    RET
+
+%endif
diff --git a/libavfilter/x86/vf_nlmeans_init.c b/libavfilter/x86/vf_nlmeans_init.c
new file mode 100644
index 0000000000..37764d30ab
--- /dev/null
+++ b/libavfilter/x86/vf_nlmeans_init.c
@@ -0,0 +1,40 @@
+/*
+ * 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/attributes.h"
+#include "libavutil/x86/cpu.h"
+#include "libavfilter/vf_nlmeans.h"
+
+void ff_compute_weights_line_avx2(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,
+                                  float *total_weight,
+                                  float *sum,
+                                  const float *const weight_lut,
+                                  int max_meaningful_diff,
+                                  int startx, int endx);
+
+av_cold void ff_nlmeans_init_x86(NLMeansDSPContext *dsp)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (ARCH_X86_64 && EXTERNAL_AVX2_FAST(cpu_flags))
+        dsp->compute_weights_line = ff_compute_weights_line_avx2;
+}