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* (c) 2001 Fabrice Bellard
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* This file is part of FFmpeg.
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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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* 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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* 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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* @file libavcodec/motion-test.c
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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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tab[i] = random() % 256;
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printf("motion-test [-h]\n"
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"test motion implementations\n");
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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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void test_motion(const char *name,
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me_cmp_func test_func, me_cmp_func ref_func)
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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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printf("error: mmx=%d c=%d\n", d1, d2);
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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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dummy = d1; /* avoid optimization */
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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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int main(int argc, char **argv)
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DSPContext cctx, mmxctx;
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int flags[2] = { FF_MM_MMX, FF_MM_MMXEXT };
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c = getopt(argc, argv, "h");
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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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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]);