/* * 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 */