2 * Copyright (C) 2012 Ronald S. Bultje
4 * This file is part of FFmpeg.
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 int emuedge_linesize_type;
34 #define EMULATED_EDGE(depth) \
35 void ff_emulated_edge_mc_ ## depth (uint8_t *buf, const uint8_t *src, ptrdiff_t linesize,\
36 int block_w, int block_h,\
37 int src_x, int src_y, int w, int h);
42 typedef struct VideoDSPContext {
44 * Copy a rectangular area of samples to a temporary buffer and replicate
47 * @param buf destination buffer
48 * @param src source buffer
49 * @param linesize number of bytes between 2 vertically adjacent samples
50 * in both the source and destination buffers
51 * @param block_w width of block
52 * @param block_h height of block
53 * @param src_x x coordinate of the top left sample of the block in the
55 * @param src_y y coordinate of the top left sample of the block in the
57 * @param w width of the source buffer
58 * @param h height of the source buffer
60 void (*emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
61 ptrdiff_t linesize, int block_w, int block_h,
62 int src_x, int src_y, int w, int h);
65 * Prefetch memory into cache (if supported by hardware).
67 * @buf pointer to buffer to prefetch memory from
68 * @stride distance between two lines of buf (in bytes)
69 * @h number of lines to prefetch
71 void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
74 void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
76 /* for internal use only (i.e. called by ff_videodsp_init() */
77 void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
78 void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
79 void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
81 #endif /* AVCODEC_VIDEODSP_H */