/* * 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 */ #include "libavutil/mem.h"#include "libavfilter/vf_nlmeans.c" static void display_integral(const uint32_t *ii, int w, int h, int lz_32){    int x, y;     for (y = 0; y < h; y++) {        for (x = 0; x < w; x++)            printf(" %7x", ii[y*lz_32 + x]);        printf("\n");    }    printf("---------------\n");} int main(void){    int ret = 0, xoff, yoff;    uint32_t *ii_start;    uint32_t *ii_start2;    NLMeansDSPContext dsp = {0};     // arbitrary test source of size 6x5 and linesize=8    const int w = 6, h = 5, lz = 8;    static const uint8_t src[] = {        0xb0, 0x71, 0xfb, 0xd8, 0x01, 0xd9, /***/ 0x01, 0x02,        0x51, 0x8e, 0x41, 0x0f, 0x84, 0x58, /***/ 0x03, 0x04,        0xc7, 0x8d, 0x07, 0x70, 0x5c, 0x47, /***/ 0x05, 0x06,        0x09, 0x4e, 0xfc, 0x74, 0x8f, 0x9a, /***/ 0x07, 0x08,        0x60, 0x8e, 0x20, 0xaa, 0x95, 0x7d, /***/ 0x09, 0x0a,    };     const int e = 3;    const int ii_w = w+e*2, ii_h = h+e*2;     // align to 4 the linesize, "+1" is for the space of the left 0-column    const int ii_lz_32 = ((ii_w + 1) + 3) & ~3;     // "+1" is for the space of the top 0-line    uint32_t *ii  = av_calloc(ii_h + 1, ii_lz_32 * sizeof(*ii));    uint32_t *ii2 = av_calloc(ii_h + 1, ii_lz_32 * sizeof(*ii2));     if (!ii || !ii2)        return -1;     ii_start  = ii  + ii_lz_32 + 1; // skip top 0-line and left 0-column    ii_start2 = ii2 + ii_lz_32 + 1; // skip top 0-line and left 0-column     ff_nlmeans_init(&dsp);     for (yoff = -e; yoff <= e; yoff++) {        for (xoff = -e; xoff <= e; xoff++) {            printf("xoff=%d yoff=%d\n", xoff, yoff);             compute_ssd_integral_image(&dsp, ii_start, ii_lz_32,                                       src, lz, xoff, yoff, e, w, h);            display_integral(ii_start, ii_w, ii_h, ii_lz_32);             compute_unsafe_ssd_integral_image(ii_start2, ii_lz_32,                                              0, 0,                                              src, lz,                                              xoff, yoff, e, w, h,                                              ii_w, ii_h);            display_integral(ii_start2, ii_w, ii_h, ii_lz_32);             if (memcmp(ii, ii2, (ii_h+1) * ii_lz_32 * sizeof(*ii))) {                printf("Integral mismatch\n");                ret = 1;                goto end;            }        }    } end:    av_freep(&ii);    av_freep(&ii2);    return ret;}