FFmpeg/libavutil/tests/color_utils.c

/*
 * Copyright (c) 2015 Kevin Wheatley <kevin.j.wheatley@gmail.com>
 *
 * 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 <stdio.h>
#include "libavutil/csp.h"
#include "libavutil/macros.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"

int main(int argc, char *argv[])
{
    static const double test_data[] = {
        -0.1, -0.018053968510807, -0.01, -0.00449, 0.0, 0.00316227760, 0.005,
        0.009, 0.015, 0.1, 1.0, 52.37, 125.098765, 1999.11123, 6945.443,
        15123.4567, 19845.88923, 98678.4231, 99999.899998
    };

    for (enum AVColorTransferCharacteristic trc = 0; trc < AVCOL_TRC_NB; trc++) {
        av_csp_trc_function func = av_csp_trc_func_from_id(trc);
        const char *name = av_color_transfer_name(trc);
        if (!func)
            continue;

        for (int i = 0; i < FF_ARRAY_ELEMS(test_data); i++) {
            double result = func(test_data[i]);
            printf("trc=%s calling func(%f) expected=%f\n",
                    name, test_data[i], result);
        }
    }
}