/* * (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 "libavcodec/me_cmp.h"#include "libavutil/cpu.h"#include "libavutil/emms.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, 8);                d2 = ref_func(NULL, img1, ptr, WIDTH, 8);                if (d1 != d2) {                    printf("error: mmx=%d c=%d\n", d1, d2);                }            }        }    }    emms_c();     /* speed test */    ti = av_gettime_relative();    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, 8);            }        }    }    emms_c();    dummy = d1; /* avoid optimization */    ti = av_gettime_relative() - 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;    MECmpContext 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->flags |= AV_CODEC_FLAG_BITEXACT;    av_force_cpu_flags(0);    ff_me_cmp_init(&cctx, ctx);    for (c = 0; c < flags_size; c++) {        int x;        av_force_cpu_flags(flags[c]);        ff_me_cmp_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;}