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ffmpeg / libavcodec / motion-test.c @ 99ed41a8

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/*
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 * (c) 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file motion-test.c
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 * motion test.
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 */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include "dsputil.h"
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#undef exit
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#undef printf
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#undef random
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#define WIDTH 64
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#define HEIGHT 64
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uint8_t img1[WIDTH * HEIGHT];
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uint8_t img2[WIDTH * HEIGHT];
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void fill_random(uint8_t *tab, int size)
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{
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    int i;
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    for(i=0;i<size;i++) {
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#if 1
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        tab[i] = random() % 256;
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#else
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        tab[i] = i;
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#endif
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    }
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}
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void help(void)
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{
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    printf("motion-test [-h]\n"
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           "test motion implementations\n");
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    exit(1);
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}
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int64_t gettime(void)
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{
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    struct timeval tv;
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    gettimeofday(&tv,NULL);
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    return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
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}
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#define NB_ITS 500
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int dummy;
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void test_motion(const char *name,
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                 me_cmp_func test_func, me_cmp_func ref_func)
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{
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    int x, y, d1, d2, it;
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    uint8_t *ptr;
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    int64_t ti;
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    printf("testing '%s'\n", name);
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    /* test correctness */
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    for(it=0;it<20;it++) {
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        fill_random(img1, WIDTH * HEIGHT);
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        fill_random(img2, WIDTH * HEIGHT);
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        for(y=0;y<HEIGHT-17;y++) {
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            for(x=0;x<WIDTH-17;x++) {
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                ptr = img2 + y * WIDTH + x;
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                d1 = test_func(NULL, img1, ptr, WIDTH, 1);
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                d2 = ref_func(NULL, img1, ptr, WIDTH, 1);
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                if (d1 != d2) {
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                    printf("error: mmx=%d c=%d\n", d1, d2);
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                }
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            }
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        }
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    }
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    emms_c();
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    /* speed test */
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    ti = gettime();
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    d1 = 0;
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    for(it=0;it<NB_ITS;it++) {
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        for(y=0;y<HEIGHT-17;y++) {
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            for(x=0;x<WIDTH-17;x++) {
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                ptr = img2 + y * WIDTH + x;
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                d1 += test_func(NULL, img1, ptr, WIDTH, 1);
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            }
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        }
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    }
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    emms_c();
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    dummy = d1; /* avoid optimization */
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    ti = gettime() - ti;
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    printf("  %0.0f kop/s\n",
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           (double)NB_ITS * (WIDTH - 16) * (HEIGHT - 16) /
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           (double)(ti / 1000.0));
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}
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int main(int argc, char **argv)
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{
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    AVCodecContext *ctx;
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    int c;
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    DSPContext cctx, mmxctx;
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    int flags[2] = { FF_MM_MMX, FF_MM_MMXEXT };
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    for(;;) {
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        c = getopt(argc, argv, "h");
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        if (c == -1)
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            break;
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        switch(c) {
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        case 'h':
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            help();
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            break;
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        }
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    }
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    printf("ffmpeg motion test\n");
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    ctx = avcodec_alloc_context();
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    ctx->dsp_mask = FF_MM_FORCE;
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    dsputil_init(&cctx, ctx);
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    for (c = 0; c < 2; c++) {
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        int x;
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        ctx->dsp_mask = FF_MM_FORCE | flags[c];
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        dsputil_init(&mmxctx, ctx);
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        for (x = 0; x < 2; x++) {
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            printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
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                   x ? 8 : 16, x ? 8 : 16);
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            test_motion("mmx",     mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
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            test_motion("mmx_x2",  mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
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            test_motion("mmx_y2",  mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
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            test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
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        }
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    }
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    av_free(ctx);
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    return 0;
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}