Edit File: pixelutils.h
/* * 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 */ #ifndef AVUTIL_PIXELUTILS_H #define AVUTIL_PIXELUTILS_H #include <stddef.h> #include <stdint.h> #include "common.h" /** * Sum of abs(src1[x] - src2[x]) */ typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1, const uint8_t *src2, ptrdiff_t stride2); /** * Get a potentially optimized pointer to a Sum-of-absolute-differences * function (see the av_pixelutils_sad_fn prototype). * * @param w_bits 1<<w_bits is the requested width of the block size * @param h_bits 1<<h_bits is the requested height of the block size * @param aligned If set to 2, the returned sad function will assume src1 and * src2 addresses are aligned on the block size. * If set to 1, the returned sad function will assume src1 is * aligned on the block size. * If set to 0, the returned sad function assume no particular * alignment. * @param log_ctx context used for logging, can be NULL * * @return a pointer to the SAD function or NULL in case of error (because of * invalid parameters) */ av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx); #endif /* AVUTIL_PIXELUTILS_H */