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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 "config.h"
00033 #include "dsputil.h"
00034 #include "libavutil/lfg.h"
00035 
00036 #undef exit
00037 #undef printf
00038 
00039 #define WIDTH 64
00040 #define HEIGHT 64
00041 
00042 uint8_t img1[WIDTH * HEIGHT];
00043 uint8_t img2[WIDTH * HEIGHT];
00044 
00045 static void fill_random(uint8_t *tab, int size)
00046 {
00047     int i;
00048     AVLFG prng;
00049 
00050     av_lfg_init(&prng, 1);
00051     for(i=0;i<size;i++) {
00052 #if 1
00053         tab[i] = av_lfg_get(&prng) % 256;
00054 #else
00055         tab[i] = i;
00056 #endif
00057     }
00058 }
00059 
00060 static void help(void)
00061 {
00062     printf("motion-test [-h]\n"
00063            "test motion implementations\n");
00064     exit(1);
00065 }
00066 
00067 static int64_t gettime(void)
00068 {
00069     struct timeval tv;
00070     gettimeofday(&tv,NULL);
00071     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
00072 }
00073 
00074 #define NB_ITS 500
00075 
00076 int dummy;
00077 
00078 static void test_motion(const char *name,
00079                  me_cmp_func test_func, me_cmp_func ref_func)
00080 {
00081     int x, y, d1, d2, it;
00082     uint8_t *ptr;
00083     int64_t ti;
00084     printf("testing '%s'\n", name);
00085 
00086     /* test correctness */
00087     for(it=0;it<20;it++) {
00088 
00089         fill_random(img1, WIDTH * HEIGHT);
00090         fill_random(img2, WIDTH * HEIGHT);
00091 
00092         for(y=0;y<HEIGHT-17;y++) {
00093             for(x=0;x<WIDTH-17;x++) {
00094                 ptr = img2 + y * WIDTH + x;
00095                 d1 = test_func(NULL, img1, ptr, WIDTH, 1);
00096                 d2 = ref_func(NULL, img1, ptr, WIDTH, 1);
00097                 if (d1 != d2) {
00098                     printf("error: mmx=%d c=%d\n", d1, d2);
00099                 }
00100             }
00101         }
00102     }
00103     emms_c();
00104 
00105     /* speed test */
00106     ti = gettime();
00107     d1 = 0;
00108     for(it=0;it<NB_ITS;it++) {
00109         for(y=0;y<HEIGHT-17;y++) {
00110             for(x=0;x<WIDTH-17;x++) {
00111                 ptr = img2 + y * WIDTH + x;
00112                 d1 += test_func(NULL, img1, ptr, WIDTH, 1);
00113             }
00114         }
00115     }
00116     emms_c();
00117     dummy = d1; /* avoid optimization */
00118     ti = gettime() - ti;
00119 
00120     printf("  %0.0f kop/s\n",
00121            (double)NB_ITS * (WIDTH - 16) * (HEIGHT - 16) /
00122            (double)(ti / 1000.0));
00123 }
00124 
00125 
00126 int main(int argc, char **argv)
00127 {
00128     AVCodecContext *ctx;
00129     int c;
00130     DSPContext cctx, mmxctx;
00131     int flags[2] = { FF_MM_MMX, FF_MM_MMX2 };
00132     int flags_size = HAVE_MMX2 ? 2 : 1;
00133 
00134     for(;;) {
00135         c = getopt(argc, argv, "h");
00136         if (c == -1)
00137             break;
00138         switch(c) {
00139         case 'h':
00140             help();
00141             break;
00142         }
00143     }
00144 
00145     printf("ffmpeg motion test\n");
00146 
00147     ctx = avcodec_alloc_context();
00148     ctx->dsp_mask = FF_MM_FORCE;
00149     dsputil_init(&cctx, ctx);
00150     for (c = 0; c < flags_size; c++) {
00151         int x;
00152         ctx->dsp_mask = FF_MM_FORCE | flags[c];
00153         dsputil_init(&mmxctx, ctx);
00154 
00155         for (x = 0; x < 2; x++) {
00156             printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
00157                    x ? 8 : 16, x ? 8 : 16);
00158             test_motion("mmx",     mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
00159             test_motion("mmx_x2",  mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
00160             test_motion("mmx_y2",  mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
00161             test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
00162         }
00163     }
00164     av_free(ctx);
00165 
00166     return 0;
00167 }

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