rle: K&R formatting cosmetics
[libav.git] / libavcodec / rle.h
1 /*
2 * RLE encoder
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVCODEC_RLE_H
22 #define AVCODEC_RLE_H
23
24 #include <stdint.h>
25
26 /**
27 * Count up to 127 consecutive pixels which are either all the same or
28 * all differ from the previous and next pixels.
29 * @param start Pointer to the first pixel
30 * @param len Maximum number of pixels
31 * @param bpp Bytes per pixel
32 * @param same 1 if searching for identical pixel values, 0 for differing
33 * @return Number of matching consecutive pixels found
34 */
35 int ff_rle_count_pixels(const uint8_t *start, int len, int bpp, int same);
36
37 /**
38 * RLE compress the row, with maximum size of out_size.
39 * Value before repeated bytes is (count ^ xor_rep) + add_rep.
40 * Value before raw bytes is (count ^ xor_raw) + add_raw.
41 * @param outbuf Output buffer
42 * @param out_size Maximum output size
43 * @param inbuf Input buffer
44 * @param bpp Bytes per pixel
45 * @param w Image width
46 * @return Size of output in bytes, or -1 if larger than out_size
47 */
48 int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *inbuf, int bpp,
49 int w, int add_rep, int xor_rep, int add_raw, int xor_raw);
50
51 #endif /* AVCODEC_RLE_H */