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1 /*
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2 * This file is part of FFmpeg.
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3 *
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4 * FFmpeg is free software; you can redistribute it and/or
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5 * modify it under the terms of the GNU Lesser General Public
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6 * License as published by the Free Software Foundation; either
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7 * version 2.1 of the License, or (at your option) any later version.
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8 *
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9 * FFmpeg is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 * Lesser General Public License for more details.
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13 *
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14 * You should have received a copy of the GNU Lesser General Public
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15 * License along with FFmpeg; if not, write to the Free Software
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16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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17 */
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18
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19 #ifndef AVUTIL_PIXELUTILS_H
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20 #define AVUTIL_PIXELUTILS_H
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21
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22 #include <stddef.h>
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23 #include <stdint.h>
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24 #include "common.h"
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25
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26 /**
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27 * Sum of abs(src1[x] - src2[x])
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28 */
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29 typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1,
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30 const uint8_t *src2, ptrdiff_t stride2);
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31
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32 /**
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33 * Get a potentially optimized pointer to a Sum-of-absolute-differences
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34 * function (see the av_pixelutils_sad_fn prototype).
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35 *
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36 * @param w_bits 1<<w_bits is the requested width of the block size
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37 * @param h_bits 1<<h_bits is the requested height of the block size
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38 * @param aligned If set to 2, the returned sad function will assume src1 and
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39 * src2 addresses are aligned on the block size.
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40 * If set to 1, the returned sad function will assume src1 is
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41 * aligned on the block size.
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42 * If set to 0, the returned sad function assume no particular
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43 * alignment.
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44 * @param log_ctx context used for logging, can be NULL
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45 *
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46 * @return a pointer to the SAD function or NULL in case of error (because of
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47 * invalid parameters)
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48 */
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49 av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits,
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50 int aligned, void *log_ctx);
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51
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52 #endif /* AVUTIL_PIXELUTILS_H */
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