vf_hflip.c

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/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU 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 <string.h>
#include "checkasm.h"
#include "libavfilter/hflip.h"
#include "libavutil/intreadwrite.h"

#define WIDTH 256
#define WIDTH_PADDED 256 + 32

#define randomize_buffers(buf, size)      \
    do {                                  \
        int j;                            \
        uint8_t *tmp_buf = (uint8_t *)buf;\
        for (j = 0; j < size; j++)        \
            tmp_buf[j] = rnd() & 0xFF;    \
    } while (0)

static void check_hflip(int step, const char * report_name){
    LOCAL_ALIGNED_32(uint8_t, src,     [WIDTH_PADDED]);
    LOCAL_ALIGNED_32(uint8_t, dst_ref, [WIDTH_PADDED]);
    LOCAL_ALIGNED_32(uint8_t, dst_new, [WIDTH_PADDED]);
    int w = WIDTH;
    int i;
    int step_array[4] = {1, 1, 1, 1};
    FlipContext s;

    declare_func(void, const uint8_t *src, uint8_t *dst, int w);

    memset(src,     0, WIDTH_PADDED);
    memset(dst_ref, 0, WIDTH_PADDED);
    memset(dst_new, 0, WIDTH_PADDED);
    randomize_buffers(src, WIDTH_PADDED);

    if (step == 2) {
        w /= 2;
        for (i = 0; i < 4; i++)
            step_array[i] = step;
    }

    ff_hflip_init(&s, step_array, 4);

    if (check_func(s.flip_line[0], "hflip_%s", report_name)) {
        for (i = 1; i < w; i++) {
            call_ref(src + (w - 1) * step, dst_ref, i);
            call_new(src + (w - 1) * step, dst_new, i);
            if (memcmp(dst_ref, dst_new, i * step))
                fail();
        }
        bench_new(src + (w - 1) * step, dst_new, w);
    }
}
void checkasm_check_vf_hflip(void)
{
    check_hflip(1, "byte");
    report("hflip_byte");

    check_hflip(2, "short");
    report("hflip_short");
}