avutil: add pixelutils API

configure

@@ -144,6 +144,7 @@ Component options:
   --disable-mdct           disable MDCT code
   --disable-rdft           disable RDFT code
   --disable-fft            disable FFT code
+  --disable-pixelutils     disable pixel utils in libavutil
 
 Hardware accelerators:
   --disable-dxva2          disable DXVA2 code [autodetect]
@@ -1451,6 +1452,7 @@ SUBSYSTEM_LIST="
     lsp
     lzo
     mdct
+    pixelutils
     network
     rdft
 "

doc/APIchanges

@@ -15,6 +15,9 @@ libavutil:     2012-10-22
 
 API changes, most recent first:
 
+2014-08-02 - xxxxxxx - lavu 52.98.100 - pixelutils.h
+  Add pixelutils API with SAD functions
+
 2014-08-xx - xxxxxxx - lavu 53.22.0 - pixfmt.h
   Add AV_PIX_FMT_YA16 pixel format for 16 bit packed gray with alpha.
 

libavutil/Makefile

@@ -44,6 +44,7 @@ HEADERS = adler32.h                                                     \
           opt.h                                                         \
           parseutils.h                                                  \
           pixdesc.h                                                     \
+          pixelutils.h                                                  \
           pixfmt.h                                                      \
           random_seed.h                                                 \
           replaygain.h                                                  \
@@ -113,6 +114,7 @@ OBJS = adler32.o                                                        \
        opt.o                                                            \
        parseutils.o                                                     \
        pixdesc.o                                                        \
+       pixelutils.o                                                     \
        random_seed.o                                                    \
        rational.o                                                       \
        rc4.o                                                            \
@@ -170,6 +172,7 @@ TESTPROGS = adler32                                                     \
             pca                                                         \
             parseutils                                                  \
             pixdesc                                                     \
+            pixelutils                                                  \
             random_seed                                                 \
             rational                                                    \
             ripemd                                                      \

libavutil/pixelutils.c

+/*
+ * 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 "config.h"
+#include "common.h"
+#include "pixelutils.h"
+
+#if CONFIG_PIXELUTILS
+
+#include "x86/pixelutils.h"
+
+static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1,
+                                    const uint8_t *src2, ptrdiff_t stride2,
+                                    int w, int h)
+{
+    int x, y, sum = 0;
+
+    for (y = 0; y < h; y++) {
+        for (x = 0; x < w; x++)
+            sum += abs(src1[x] - src2[x]);
+        src1 += stride1;
+        src2 += stride2;
+    }
+    return sum;
+}
+
+#define DECLARE_BLOCK_FUNCTIONS(size)                                               \
+static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1,    \
+                                         const uint8_t *src2, ptrdiff_t stride2)    \
+{                                                                                   \
+    return sad_wxh(src1, stride1, src2, stride2, size, size);                       \
+}
+
+DECLARE_BLOCK_FUNCTIONS(2)
+DECLARE_BLOCK_FUNCTIONS(4)
+DECLARE_BLOCK_FUNCTIONS(8)
+DECLARE_BLOCK_FUNCTIONS(16)
+
+static const av_pixelutils_sad_fn sad_c[] = {
+    block_sad_2x2_c,
+    block_sad_4x4_c,
+    block_sad_8x8_c,
+    block_sad_16x16_c,
+};
+
+#endif /* CONFIG_PIXELUTILS */
+
+av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
+{
+#if !CONFIG_PIXELUTILS
+    av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required "
+           "but libavutil is not compiled with it\n");
+    return NULL;
+#else
+    av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)];
+
+    memcpy(sad, sad_c, sizeof(sad));
+
+    if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) ||
+        h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad))
+        return NULL;
+    if (w_bits != h_bits) // only squared sad for now
+        return NULL;
+
+#if ARCH_X86
+    ff_pixelutils_sad_init_x86(sad, aligned);
+#endif
+
+    return sad[w_bits - 1];
+#endif
+}
+
+#ifdef TEST
+#define W1 320
+#define H1 240
+#define W2 640
+#define H2 480
+
+static int run_test(const char *test,
+                    const uint32_t *b1, const uint32_t *b2)
+{
+    int i, a, ret = 0;
+
+    for (a = 0; a < 3; a++) {
+        const uint8_t *block1 = (const uint8_t *)b1;
+        const uint8_t *block2 = (const uint8_t *)b2;
+
+        switch (a) {
+        case 0: block1++; block2++; break;
+        case 1:           block2++; break;
+        case 2:                     break;
+        }
+        for (i = 1; i <= FF_ARRAY_ELEMS(sad_c); i++) {
+            av_pixelutils_sad_fn f_ref = sad_c[i - 1];
+            av_pixelutils_sad_fn f_out = av_pixelutils_get_sad_fn(i, i, a, NULL);
+            const int out = f_out(block1, W1, block2, W2);
+            const int ref = f_ref(block1, W1, block2, W2);
+            printf("[%s] [%c%c] SAD [%s] %dx%d=%d ref=%d\n",
+                   out == ref ? "OK" : "FAIL",
+                   a ? 'A' : 'U', a == 2 ? 'A' : 'U',
+                   test, 1<<i, 1<<i, out, ref);
+            if (out != ref)
+                ret = 1;
+        }
+    }
+    return ret;
+}
+
+int main(void)
+{
+    int i, ret;
+    DECLARE_ALIGNED(32, uint32_t, buf1)[W1*H1];
+    DECLARE_ALIGNED(32, uint32_t, buf2)[W2*H2];
+    uint32_t state = 0;
+
+    for (i = 0; i < W1*H1; i++) {
+        state = state * 1664525 + 1013904223;
+        buf1[i] = state;
+    }
+    for (i = 0; i < W2*H2; i++) {
+        state = state * 1664525 + 1013904223;
+        buf2[i] = state;
+    }
+    ret = run_test("random", buf1, buf2);
+    if (ret < 0)
+        return ret;
+
+    memset(buf1, 0xff, sizeof(buf1));
+    memset(buf2, 0x00, sizeof(buf2));
+    ret = run_test("max", buf1, buf2);
+    if (ret < 0)
+        return ret;
+
+    memset(buf1, 0x90, sizeof(buf1));
+    memset(buf2, 0x90, sizeof(buf2));
+    return run_test("min", buf1, buf2);
+}
+#endif /* TEST */

libavutil/pixelutils.h

+/*
+ * 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 AVUTIL_PIXELUTILS_H
+#define AVUTIL_PIXELUTILS_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include "common.h"
+
+/**
+ * Sum of abs(src1[x] - src2[x])
+ */
+typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1,
+                                    const uint8_t *src2, ptrdiff_t stride2);
+
+/**
+ * Get a potentially optimized pointer to a Sum-of-absolute-differences
+ * function (see the av_pixelutils_sad_fn prototype).
+ *
+ * @param w_bits  1<<w_bits is the requested width of the block size
+ * @param h_bits  1<<h_bits is the requested height of the block size
+ * @param aligned If set to 2, the returned sad function will assume src1 and
+ *                src2 addresses are aligned on the block size.
+ *                If set to 1, the returned sad function will assume src1 is
+ *                aligned on the block size.
+ *                If set to 0, the returned sad function assume no particular
+ *                alignment.
+ * @param log_ctx context used for logging, can be NULL
+ *
+ * @return a pointer to the SAD function or NULL in case of error (because of
+ *         invalid parameters)
+ */
+av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits,
+                                              int aligned, void *log_ctx);
+
+#endif /* AVUTIL_PIXELUTILS_H */

libavutil/version.h

@@ -56,7 +56,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  52
-#define LIBAVUTIL_VERSION_MINOR  97
+#define LIBAVUTIL_VERSION_MINOR  98
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

libavutil/x86/Makefile

@@ -2,7 +2,11 @@ OBJS += x86/cpu.o                                                       \
         x86/float_dsp_init.o                                            \
         x86/lls_init.o                                                  \
 
+OBJS-$(CONFIG_PIXELUTILS) += x86/pixelutils_init.o                      \
+
 YASM-OBJS += x86/cpuid.o                                                \
              x86/emms.o                                                 \
              x86/float_dsp.o                                            \
              x86/lls.o                                                  \
+
+YASM-OBJS-$(CONFIG_PIXELUTILS) += x86/pixelutils.o                      \

libavutil/x86/pixelutils.asm

+;******************************************************************************
+;* Pixel utilities SIMD
+;*
+;* Copyright (C) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+;* Copyright (C) 2014 Clément Bœsch <u pkh me>
+;*
+;* 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 "x86util.asm"
+
+SECTION_TEXT
+
+;-------------------------------------------------------------------------------
+; int ff_pixelutils_sad_8x8_mmx(const uint8_t *src1, ptrdiff_t stride1,
+;                               const uint8_t *src2, ptrdiff_t stride2);
+;-------------------------------------------------------------------------------
+INIT_MMX mmx
+cglobal pixelutils_sad_8x8, 4,4,0, src1, stride1, src2, stride2
+    pxor        m7, m7
+    pxor        m6, m6
+%rep 4
+    mova        m0, [src1q]
+    mova        m2, [src1q + stride1q]
+    mova        m1, [src2q]
+    mova        m3, [src2q + stride2q]
+    psubusb     m4, m0, m1
+    psubusb     m5, m2, m3
+    psubusb     m1, m0
+    psubusb     m3, m2
+    por         m1, m4
+    por         m3, m5
+    punpcklbw   m0, m1, m7
+    punpcklbw   m2, m3, m7
+    punpckhbw   m1, m7
+    punpckhbw   m3, m7
+    paddw       m0, m1
+    paddw       m2, m3
+    paddw       m0, m2
+    paddw       m6, m0
+    lea         src1q, [src1q + 2*stride1q]
+    lea         src2q, [src2q + 2*stride2q]
+%endrep
+    psrlq       m0, m6, 32
+    paddw       m6, m0
+    psrlq       m0, m6, 16
+    paddw       m6, m0
+    movd        eax, m6
+    movzx       eax, ax
+    RET
+
+;-------------------------------------------------------------------------------
+; int ff_pixelutils_sad_8x8_mmxext(const uint8_t *src1, ptrdiff_t stride1,
+;                                  const uint8_t *src2, ptrdiff_t stride2);
+;-------------------------------------------------------------------------------
+INIT_MMX mmxext
+cglobal pixelutils_sad_8x8, 4,4,0, src1, stride1, src2, stride2
+    pxor        m2, m2
+%rep 4
+    mova        m0, [src1q]
+    mova        m1, [src1q + stride1q]
+    psadbw      m0, [src2q]
+    psadbw      m1, [src2q + stride2q]
+    paddw       m2, m0
+    paddw       m2, m1
+    lea         src1q, [src1q + 2*stride1q]
+    lea         src2q, [src2q + 2*stride2q]
+%endrep
+    movd        eax, m2
+    RET
+
+;-------------------------------------------------------------------------------
+; int ff_pixelutils_sad_16x16_mmxext(const uint8_t *src1, ptrdiff_t stride1,
+;                                    const uint8_t *src2, ptrdiff_t stride2);
+;-------------------------------------------------------------------------------
+INIT_MMX mmxext
+cglobal pixelutils_sad_16x16, 4,4,0, src1, stride1, src2, stride2
+    pxor        m2, m2
+%rep 16
+    mova        m0, [src1q]
+    mova        m1, [src1q + 8]
+    psadbw      m0, [src2q]
+    psadbw      m1, [src2q + 8]
+    paddw       m2, m0
+    paddw       m2, m1
+    add         src1q, stride1q
+    add         src2q, stride2q
+%endrep
+    movd        eax, m2
+    RET
+
+;-------------------------------------------------------------------------------
+; int ff_pixelutils_sad_16x16_sse(const uint8_t *src1, ptrdiff_t stride1,
+;                                 const uint8_t *src2, ptrdiff_t stride2);
+;-------------------------------------------------------------------------------
+INIT_XMM sse2
+cglobal pixelutils_sad_16x16, 4,4,5, src1, stride1, src2, stride2
+    pxor        m4, m4
+%rep 8
+    movu        m0, [src1q]
+    movu        m1, [src1q + stride1q]
+    movu        m2, [src2q]
+    movu        m3, [src2q + stride2q]
+    psadbw      m0, m2
+    psadbw      m1, m3
+    paddw       m4, m0
+    paddw       m4, m1
+    lea         src1q, [src1q + 2*stride1q]
+    lea         src2q, [src2q + 2*stride2q]
+%endrep
+    movhlps     m0, m4
+    paddw       m4, m0
+    movd        eax, m4
+    RET
+
+;-------------------------------------------------------------------------------
+; int ff_pixelutils_sad_[au]_16x16_sse(const uint8_t *src1, ptrdiff_t stride1,
+;                                      const uint8_t *src2, ptrdiff_t stride2);
+;-------------------------------------------------------------------------------
+%macro SAD_XMM_16x16 1
+INIT_XMM sse2
+cglobal pixelutils_sad_%1_16x16, 4,4,3, src1, stride1, src2, stride2
+    pxor        m2, m2
+%rep 8
+    mov%1       m0, [src2q]
+    mov%1       m1, [src2q + stride2q]
+    psadbw      m0, [src1q]
+    psadbw      m1, [src1q + stride1q]
+    paddw       m2, m0
+    paddw       m2, m1
+    lea         src1q, [src1q + 2*stride1q]
+    lea         src2q, [src2q + 2*stride2q]
+%endrep
+    movhlps     m0, m2
+    paddw       m2, m0
+    movd        eax, m2
+    RET
+%endmacro
+
+SAD_XMM_16x16 a
+SAD_XMM_16x16 u

libavutil/x86/pixelutils.h

+/*
+ * 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 AVUTIL_X86_PIXELUTILS_H
+#define AVUTIL_X86_PIXELUTILS_H
+
+#include "libavutil/pixelutils.h"
+
+void ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn *sad, int aligned);
+
+#endif /* AVUTIL_X86_PIXELUTILS_H */

libavutil/x86/pixelutils_init.c

+/*
+ * 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 "config.h"
+
+#include "pixelutils.h"
+#include "cpu.h"
+
+int ff_pixelutils_sad_8x8_mmx(const uint8_t *src1, ptrdiff_t stride1,
+                              const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_8x8_mmxext(const uint8_t *src1, ptrdiff_t stride1,
+                                 const uint8_t *src2, ptrdiff_t stride2);
+
+int ff_pixelutils_sad_16x16_mmxext(const uint8_t *src1, ptrdiff_t stride1,
+                                   const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
+                                 const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_a_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
+                                   const uint8_t *src2, ptrdiff_t stride2);
+int ff_pixelutils_sad_u_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
+                                   const uint8_t *src2, ptrdiff_t stride2);
+
+void ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn *sad, int aligned)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (EXTERNAL_MMX(cpu_flags)) {
+        sad[2] = ff_pixelutils_sad_8x8_mmx;
+    }
+
+    if (EXTERNAL_MMXEXT(cpu_flags)) {
+        sad[2] = ff_pixelutils_sad_8x8_mmxext;
+        sad[3] = ff_pixelutils_sad_16x16_mmxext;
+    }
+
+    if (EXTERNAL_SSE2(cpu_flags)) {
+        switch (aligned) {
+        case 0: sad[3] = ff_pixelutils_sad_16x16_sse2;   break; // src1 unaligned, src2 unaligned
+        case 1: sad[3] = ff_pixelutils_sad_u_16x16_sse2; break; // src1   aligned, src2 unaligned
+        case 2: sad[3] = ff_pixelutils_sad_a_16x16_sse2; break; // src1   aligned, src2   aligned
+        }
+    }
+}

tests/fate/libavutil.mak

@@ -73,6 +73,10 @@ FATE_LIBAVUTIL += fate-parseutils
 fate-parseutils: libavutil/parseutils-test$(EXESUF)
 fate-parseutils: CMD = run libavutil/parseutils-test
 
+FATE_LIBAVUTIL-$(CONFIG_PIXELUTILS) += fate-pixelutils
+fate-pixelutils: libavutil/pixelutils-test$(EXESUF)
+fate-pixelutils: CMD = run libavutil/pixelutils-test
+
 FATE_LIBAVUTIL += fate-random_seed
 fate-random_seed: libavutil/random_seed-test$(EXESUF)
 fate-random_seed: CMD = run libavutil/random_seed-test
@@ -98,5 +102,6 @@ FATE_LIBAVUTIL += fate-xtea
 fate-xtea: libavutil/xtea-test$(EXESUF)
 fate-xtea: CMD = run libavutil/xtea-test
 
+FATE_LIBAVUTIL += $(FATE_LIBAVUTIL-yes)
 FATE-$(CONFIG_AVUTIL) += $(FATE_LIBAVUTIL)
 fate-libavutil: $(FATE_LIBAVUTIL)

tests/ref/fate/pixelutils

+[OK] [UU] SAD [random] 2x2=314 ref=314
+[OK] [UU] SAD [random] 4x4=1129 ref=1129
+[OK] [UU] SAD [random] 8x8=4936 ref=4936
+[OK] [UU] SAD [random] 16x16=20704 ref=20704
+[OK] [AU] SAD [random] 2x2=440 ref=440
+[OK] [AU] SAD [random] 4x4=1317 ref=1317
+[OK] [AU] SAD [random] 8x8=5262 ref=5262
+[OK] [AU] SAD [random] 16x16=21040 ref=21040
+[OK] [AA] SAD [random] 2x2=196 ref=196
+[OK] [AA] SAD [random] 4x4=1225 ref=1225
+[OK] [AA] SAD [random] 8x8=4712 ref=4712
+[OK] [AA] SAD [random] 16x16=21184 ref=21184
+[OK] [UU] SAD [max] 2x2=1020 ref=1020
+[OK] [UU] SAD [max] 4x4=4080 ref=4080
+[OK] [UU] SAD [max] 8x8=16320 ref=16320
+[OK] [UU] SAD [max] 16x16=65280 ref=65280
+[OK] [AU] SAD [max] 2x2=1020 ref=1020
+[OK] [AU] SAD [max] 4x4=4080 ref=4080
+[OK] [AU] SAD [max] 8x8=16320 ref=16320
+[OK] [AU] SAD [max] 16x16=65280 ref=65280
+[OK] [AA] SAD [max] 2x2=1020 ref=1020
+[OK] [AA] SAD [max] 4x4=4080 ref=4080
+[OK] [AA] SAD [max] 8x8=16320 ref=16320
+[OK] [AA] SAD [max] 16x16=65280 ref=65280
+[OK] [UU] SAD [min] 2x2=0 ref=0
+[OK] [UU] SAD [min] 4x4=0 ref=0
+[OK] [UU] SAD [min] 8x8=0 ref=0
+[OK] [UU] SAD [min] 16x16=0 ref=0
+[OK] [AU] SAD [min] 2x2=0 ref=0
+[OK] [AU] SAD [min] 4x4=0 ref=0
+[OK] [AU] SAD [min] 8x8=0 ref=0
+[OK] [AU] SAD [min] 16x16=0 ref=0
+[OK] [AA] SAD [min] 2x2=0 ref=0
+[OK] [AA] SAD [min] 4x4=0 ref=0
+[OK] [AA] SAD [min] 8x8=0 ref=0
+[OK] [AA] SAD [min] 16x16=0 ref=0