1 /* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #ifndef AVUTIL_PIXELUTILS_H 20 #define AVUTIL_PIXELUTILS_H 21 22 #include <stddef.h> 23 #include <stdint.h> 24 #include "common.h" 25 26 /** 27 * Sum of abs(src1[x] - src2[x]) 28 */ 29 typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1, 30 const uint8_t *src2, ptrdiff_t stride2); 31 32 /** 33 * Get a potentially optimized pointer to a Sum-of-absolute-differences 34 * function (see the av_pixelutils_sad_fn prototype). 35 * 36 * @param w_bits 1<<w_bits is the requested width of the block size 37 * @param h_bits 1<<h_bits is the requested height of the block size 38 * @param aligned If set to 2, the returned sad function will assume src1 and 39 * src2 addresses are aligned on the block size. 40 * If set to 1, the returned sad function will assume src1 is 41 * aligned on the block size. 42 * If set to 0, the returned sad function assume no particular 43 * alignment. 44 * @param log_ctx context used for logging, can be NULL 45 * 46 * @return a pointer to the SAD function or NULL in case of error (because of 47 * invalid parameters) 48 */ 49 av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, 50 int aligned, void *log_ctx); 51 52 #endif /* AVUTIL_PIXELUTILS_H */ 53