mirror of
https://github.com/xiaoyifang/goldendict-ng.git
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52 lines
2 KiB
C
52 lines
2 KiB
C
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_PIXELUTILS_H
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#define AVUTIL_PIXELUTILS_H
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#include <stddef.h>
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#include <stdint.h>
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/**
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* Sum of abs(src1[x] - src2[x])
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*/
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typedef int (*av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2);
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/**
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* Get a potentially optimized pointer to a Sum-of-absolute-differences
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* function (see the av_pixelutils_sad_fn prototype).
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*
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* @param w_bits 1<<w_bits is the requested width of the block size
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* @param h_bits 1<<h_bits is the requested height of the block size
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* @param aligned If set to 2, the returned sad function will assume src1 and
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* src2 addresses are aligned on the block size.
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* If set to 1, the returned sad function will assume src1 is
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* aligned on the block size.
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* If set to 0, the returned sad function assume no particular
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* alignment.
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* @param log_ctx context used for logging, can be NULL
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*
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* @return a pointer to the SAD function or NULL in case of error (because of
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* invalid parameters)
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*/
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av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits,
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int aligned, void *log_ctx);
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#endif /* AVUTIL_PIXELUTILS_H */
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