2 * Copyright (C) 2012 Ronald S. Bultje
4 * This file is part of Libav.
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.
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.
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
23 * Core video DSP helper functions
26 #ifndef AVCODEC_VIDEODSP_H
27 #define AVCODEC_VIDEODSP_H
32 typedef struct VideoDSPContext {
34 * Copy a rectangular area of samples to a temporary buffer and replicate
37 * @param buf destination buffer
38 * @param src source buffer
39 * @param buf_linesize number of bytes between 2 vertically adjacent
40 * samples in the destination buffer
41 * @param src_linesize number of bytes between 2 vertically adjacent
42 * samples in both the source buffer
43 * @param block_w width of block
44 * @param block_h height of block
45 * @param src_x x coordinate of the top left sample of the block in the
47 * @param src_y y coordinate of the top left sample of the block in the
49 * @param w width of the source buffer
50 * @param h height of the source buffer
52 void (*emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
53 ptrdiff_t buf_linesize,
54 ptrdiff_t src_linesize,
55 int block_w, int block_h,
56 int src_x, int src_y, int w, int h);
59 * Prefetch memory into cache (if supported by hardware).
61 * @param buf pointer to buffer to prefetch memory from
62 * @param stride distance between two lines of buf (in bytes)
63 * @param h number of lines to prefetch
65 void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
68 void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
70 /* for internal use only (i.e. called by ff_videodsp_init() */
71 void ff_videodsp_init_aarch64(VideoDSPContext *ctx, int bpc);
72 void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
73 void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
74 void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
76 #endif /* AVCODEC_VIDEODSP_H */