avfilter/vf_v360: add SIMD for lagrange9 interpolation

libavfilter/x86/vf_v360.asm

@@ -165,6 +165,49 @@ DEFINE_ARGS dst, width, src, x, u, v, ker
 
 %if ARCH_X86_64
 
+INIT_YMM avx2
+cglobal remap3_8bit_line, 7, 11, 8, dst, width, src, in_linesize, u, v, ker, x, y, tmp, z
+    movsxdifnidn widthq, widthd
+    xor             zq, zq
+    xor             yq, yq
+    xor             xq, xq
+    movd           xm0, in_linesized
+    pcmpeqw         m7, m7
+    vpbroadcastd    m0, xm0
+    vpbroadcastd    m6, [pd_255]
+
+    .loop:
+        pmovsxwd   m1, [kerq + yq]
+        pmovsxwd   m2, [vq + yq]
+        pmovsxwd   m3, [uq + yq]
+
+        pmulld          m4, m2, m0
+        paddd           m4, m3
+        mova            m3, m7
+        vpgatherdd      m2, [srcq + m4], m3
+        pand            m2, m6
+        pmulld          m2, m1
+        HADDD           m2, m1
+        movzx         tmpq, word [vq + yq + 16]
+        imul          tmpq, in_linesizeq
+        movzx           zq, word [uq + yq + 16]
+        add           tmpq, zq
+        movzx           zq, byte [srcq + tmpq]
+        movzx         tmpq, word [kerq + yq + 16]
+        imul            zd, tmpd
+        movd           xm1, zd
+        paddd           m2, m1
+        psrld           m2, m2, 0xe
+
+        packuswb        m2, m2
+        pextrb   [dstq+xq], xm2, 0
+
+        add   xq, 1
+        add   yq, 18
+        cmp   xq, widthq
+        jl .loop
+    RET
+
 INIT_YMM avx2
 cglobal remap4_8bit_line, 7, 9, 11, dst, width, src, in_linesize, u, v, ker, x, y
     movsxdifnidn widthq, widthd

libavfilter/x86/vf_v360_init.c

@@ -29,6 +29,9 @@ void ff_remap1_8bit_line_avx2(uint8_t *dst, int width, const uint8_t *src, ptrdi
 void ff_remap2_8bit_line_avx2(uint8_t *dst, int width, const uint8_t *src, ptrdiff_t in_linesize,
                               const int16_t *const u, const int16_t *const v, const int16_t *const ker);
 
+void ff_remap3_8bit_line_avx2(uint8_t *dst, int width, const uint8_t *src, ptrdiff_t in_linesize,
+                              const int16_t *const u, const int16_t *const v, const int16_t *const ker);
+
 void ff_remap4_8bit_line_avx2(uint8_t *dst, int width, const uint8_t *src, ptrdiff_t in_linesize,
                               const int16_t *const u, const int16_t *const v, const int16_t *const ker);
 
@@ -55,6 +58,9 @@ av_cold void ff_v360_init_x86(V360Context *s, int depth)
         s->remap_line = ff_remap2_16bit_line_avx2;
 
 #if ARCH_X86_64
+    if (EXTERNAL_AVX2_FAST(cpu_flags) && s->interp == LAGRANGE9 && depth <= 8)
+        s->remap_line = ff_remap3_8bit_line_avx2;
+
     if (EXTERNAL_AVX2_FAST(cpu_flags) && (s->interp == BICUBIC ||
                                           s->interp == LANCZOS) && depth <= 8)
         s->remap_line = ff_remap4_8bit_line_avx2;