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libavcodec/motion-test.c

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00001 /*
00002  * (c) 2001 Fabrice Bellard
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00026 #include <stdlib.h>
00027 #include <stdio.h>
00028 #include <string.h>
00029 #include <sys/time.h>
00030 #include <unistd.h>
00031 
00032 #include "dsputil.h"
00033 
00034 #undef exit
00035 #undef printf
00036 #undef random
00037 
00038 #define WIDTH 64
00039 #define HEIGHT 64
00040 
00041 uint8_t img1[WIDTH * HEIGHT];
00042 uint8_t img2[WIDTH * HEIGHT];
00043 
00044 void fill_random(uint8_t *tab, int size)
00045 {
00046     int i;
00047     for(i=0;i<size;i++) {
00048 #if 1
00049         tab[i] = random() % 256;
00050 #else
00051         tab[i] = i;
00052 #endif
00053     }
00054 }
00055 
00056 void help(void)
00057 {
00058     printf("motion-test [-h]\n"
00059            "test motion implementations\n");
00060     exit(1);
00061 }
00062 
00063 int64_t gettime(void)
00064 {
00065     struct timeval tv;
00066     gettimeofday(&tv,NULL);
00067     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
00068 }
00069 
00070 #define NB_ITS 500
00071 
00072 int dummy;
00073 
00074 void test_motion(const char *name,
00075                  me_cmp_func test_func, me_cmp_func ref_func)
00076 {
00077     int x, y, d1, d2, it;
00078     uint8_t *ptr;
00079     int64_t ti;
00080     printf("testing '%s'\n", name);
00081 
00082     /* test correctness */
00083     for(it=0;it<20;it++) {
00084 
00085         fill_random(img1, WIDTH * HEIGHT);
00086         fill_random(img2, WIDTH * HEIGHT);
00087 
00088         for(y=0;y<HEIGHT-17;y++) {
00089             for(x=0;x<WIDTH-17;x++) {
00090                 ptr = img2 + y * WIDTH + x;
00091                 d1 = test_func(NULL, img1, ptr, WIDTH, 1);
00092                 d2 = ref_func(NULL, img1, ptr, WIDTH, 1);
00093                 if (d1 != d2) {
00094                     printf("error: mmx=%d c=%d\n", d1, d2);
00095                 }
00096             }
00097         }
00098     }
00099     emms_c();
00100 
00101     /* speed test */
00102     ti = gettime();
00103     d1 = 0;
00104     for(it=0;it<NB_ITS;it++) {
00105         for(y=0;y<HEIGHT-17;y++) {
00106             for(x=0;x<WIDTH-17;x++) {
00107                 ptr = img2 + y * WIDTH + x;
00108                 d1 += test_func(NULL, img1, ptr, WIDTH, 1);
00109             }
00110         }
00111     }
00112     emms_c();
00113     dummy = d1; /* avoid optimization */
00114     ti = gettime() - ti;
00115 
00116     printf("  %0.0f kop/s\n",
00117            (double)NB_ITS * (WIDTH - 16) * (HEIGHT - 16) /
00118            (double)(ti / 1000.0));
00119 }
00120 
00121 
00122 int main(int argc, char **argv)
00123 {
00124     AVCodecContext *ctx;
00125     int c;
00126     DSPContext cctx, mmxctx;
00127     int flags[2] = { FF_MM_MMX, FF_MM_MMXEXT };
00128 
00129     for(;;) {
00130         c = getopt(argc, argv, "h");
00131         if (c == -1)
00132             break;
00133         switch(c) {
00134         case 'h':
00135             help();
00136             break;
00137         }
00138     }
00139 
00140     printf("ffmpeg motion test\n");
00141 
00142     ctx = avcodec_alloc_context();
00143     ctx->dsp_mask = FF_MM_FORCE;
00144     dsputil_init(&cctx, ctx);
00145     for (c = 0; c < 2; c++) {
00146         int x;
00147         ctx->dsp_mask = FF_MM_FORCE | flags[c];
00148         dsputil_init(&mmxctx, ctx);
00149 
00150         for (x = 0; x < 2; x++) {
00151             printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
00152                    x ? 8 : 16, x ? 8 : 16);
00153             test_motion("mmx",     mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
00154             test_motion("mmx_x2",  mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
00155             test_motion("mmx_y2",  mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
00156             test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
00157         }
00158     }
00159     av_free(ctx);
00160 
00161     return 0;
00162 }

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