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 #define EMULATED_EDGE(depth) \
33 void ff_emulated_edge_mc_ ## depth(uint8_t *dst, ptrdiff_t dst_stride, \
34 const uint8_t *src, ptrdiff_t src_stride, \
35 int block_w, int block_h,\
36 int src_x, int src_y, int w, int h);
41 typedef struct VideoDSPContext {
43 * Copy a rectangular area of samples to a temporary buffer and replicate
46 * @param dst destination buffer
47 * @param dst_stride number of bytes between 2 vertically adjacent samples
48 * in destination buffer
49 * @param src source buffer
50 * @param src_stride number of bytes between 2 vertically adjacent samples
52 * @param block_w width of block
53 * @param block_h height of block
54 * @param src_x x coordinate of the top left sample of the block in the
56 * @param src_y y coordinate of the top left sample of the block in the
58 * @param w width of the source buffer
59 * @param h height of the source buffer
61 void (*emulated_edge_mc)(uint8_t *dst, ptrdiff_t dst_stride,
62 const uint8_t *src, ptrdiff_t src_stride,
63 int block_w, int block_h,
64 int src_x, int src_y, int w, int h);
67 * Prefetch memory into cache (if supported by hardware).
69 * @param buf pointer to buffer to prefetch memory from
70 * @param stride distance between two lines of buf (in bytes)
71 * @param h number of lines to prefetch
73 void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
76 void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
78 /* for internal use only (i.e. called by ff_videodsp_init() */
79 void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
80 void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
81 void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
83 #endif /* AVCODEC_VIDEODSP_H */