aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* RLE encoder
*
* 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 AVCODEC_RLE_H
#define AVCODEC_RLE_H
#include <stdint.h>
/**
* Count up to 127 consecutive pixels which are either all the same or
* all differ from the previous and next pixels.
* @param start Pointer to the first pixel
* @param len Maximum number of pixels
* @param bpp Bytes per pixel
* @param same 1 if searching for identical pixel values, 0 for differing
* @return Number of matching consecutive pixels found
*/
int ff_rle_count_pixels(const uint8_t *start, int len, int bpp, int same);
/**
* RLE compress the row, with maximum size of out_size.
* Value before repeated bytes is (count ^ xor_rep) + add_rep.
* Value before raw bytes is (count ^ xor_raw) + add_raw.
* @param outbuf Output buffer
* @param out_size Maximum output size
* @param inbuf Input buffer
* @param bpp Bytes per pixel
* @param w Image width
* @return Size of output in bytes, or -1 if larger than out_size
*/
int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *inbuf, int bpp,
int w, int add_rep, int xor_rep, int add_raw, int xor_raw);
#endif /* AVCODEC_RLE_H */
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