From c868219c9accf267a21792111e186b3dd0b7a0ab Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Mon, 3 Sep 2012 22:46:19 +0200
Subject: [PATCH] lavc: put motion test back.

While not that usefull, we can as well keep it until it breaks.
When it breaks for whatever reason ill likely remove it
Sorry for the revert spam, i had not realized this code compiles
and works fine.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/Makefile      |   1 +
 libavcodec/motion-test.c | 149 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 150 insertions(+)
 create mode 100644 libavcodec/motion-test.c

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 50120f84c1..ae2efb6e5e 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -780,6 +780,7 @@ TESTPROGS = cabac                                                       \
             raw                                                         \
             snowenc                                                     \
 
+TESTPROGS-$(HAVE_MMX) += motion
 TESTOBJS = dctref.o
 
 HOSTPROGS = aac_tablegen                                                \
diff --git a/libavcodec/motion-test.c b/libavcodec/motion-test.c
new file mode 100644
index 0000000000..3504ccfd68
--- /dev/null
+++ b/libavcodec/motion-test.c
@@ -0,0 +1,149 @@
+/*
+ * (c) 2001 Fabrice Bellard
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * motion test.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "config.h"
+#include "dsputil.h"
+#include "libavutil/internal.h"
+#include "libavutil/lfg.h"
+#include "libavutil/mem.h"
+#include "libavutil/time.h"
+
+#undef printf
+
+#define WIDTH 64
+#define HEIGHT 64
+
+static uint8_t img1[WIDTH * HEIGHT];
+static uint8_t img2[WIDTH * HEIGHT];
+
+static void fill_random(uint8_t *tab, int size)
+{
+    int i;
+    AVLFG prng;
+
+    av_lfg_init(&prng, 1);
+    for(i=0;i<size;i++) {
+        tab[i] = av_lfg_get(&prng) % 256;
+    }
+}
+
+static void help(void)
+{
+    printf("motion-test [-h]\n"
+           "test motion implementations\n");
+}
+
+#define NB_ITS 500
+
+int dummy;
+
+static void test_motion(const char *name,
+                 me_cmp_func test_func, me_cmp_func ref_func)
+{
+    int x, y, d1, d2, it;
+    uint8_t *ptr;
+    int64_t ti;
+    printf("testing '%s'\n", name);
+
+    /* test correctness */
+    for(it=0;it<20;it++) {
+
+        fill_random(img1, WIDTH * HEIGHT);
+        fill_random(img2, WIDTH * HEIGHT);
+
+        for(y=0;y<HEIGHT-17;y++) {
+            for(x=0;x<WIDTH-17;x++) {
+                ptr = img2 + y * WIDTH + x;
+                d1 = test_func(NULL, img1, ptr, WIDTH, 1);
+                d2 = ref_func(NULL, img1, ptr, WIDTH, 1);
+                if (d1 != d2) {
+                    printf("error: mmx=%d c=%d\n", d1, d2);
+                }
+            }
+        }
+    }
+    emms_c();
+
+    /* speed test */
+    ti = av_gettime();
+    d1 = 0;
+    for(it=0;it<NB_ITS;it++) {
+        for(y=0;y<HEIGHT-17;y++) {
+            for(x=0;x<WIDTH-17;x++) {
+                ptr = img2 + y * WIDTH + x;
+                d1 += test_func(NULL, img1, ptr, WIDTH, 1);
+            }
+        }
+    }
+    emms_c();
+    dummy = d1; /* avoid optimization */
+    ti = av_gettime() - ti;
+
+    printf("  %0.0f kop/s\n",
+           (double)NB_ITS * (WIDTH - 16) * (HEIGHT - 16) /
+           (double)(ti / 1000.0));
+}
+
+
+int main(int argc, char **argv)
+{
+    AVCodecContext *ctx;
+    int c;
+    DSPContext cctx, mmxctx;
+    int flags[2] = { AV_CPU_FLAG_MMX, AV_CPU_FLAG_MMXEXT };
+    int flags_size = HAVE_MMXEXT ? 2 : 1;
+
+    if (argc > 1) {
+        help();
+        return 1;
+    }
+
+    printf("ffmpeg motion test\n");
+
+    ctx = avcodec_alloc_context3(NULL);
+    ctx->dsp_mask = AV_CPU_FLAG_FORCE;
+    ff_dsputil_init(&cctx, ctx);
+    for (c = 0; c < flags_size; c++) {
+        int x;
+        ctx->dsp_mask = AV_CPU_FLAG_FORCE | flags[c];
+        ff_dsputil_init(&mmxctx, ctx);
+
+        for (x = 0; x < 2; x++) {
+            printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
+                   x ? 8 : 16, x ? 8 : 16);
+            test_motion("mmx",     mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
+            test_motion("mmx_x2",  mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
+            test_motion("mmx_y2",  mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
+            test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
+        }
+    }
+    av_free(ctx);
+
+    return 0;
+}