| /* |
| * 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 */ |
