Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / videodsp.h
1 /*
2 * Copyright (C) 2012 Ronald S. Bultje
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 /**
22 * @file
23 * Core video DSP helper functions
24 */
25
26 #ifndef AVCODEC_VIDEODSP_H
27 #define AVCODEC_VIDEODSP_H
28
29 #include <stddef.h>
30 #include <stdint.h>
31
32 #define EMULATED_EDGE(depth) \
33 void ff_emulated_edge_mc_ ## depth(uint8_t *dst, const uint8_t *src, \
34 ptrdiff_t dst_stride, ptrdiff_t src_stride, \
35 int block_w, int block_h,\
36 int src_x, int src_y, int w, int h);
37
38 EMULATED_EDGE(8)
39 EMULATED_EDGE(16)
40
41 typedef struct VideoDSPContext {
42 /**
43 * Copy a rectangular area of samples to a temporary buffer and replicate
44 * the border samples.
45 *
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 dst_linesize number of bytes between 2 vertically adjacent
51 * samples in the destination buffer
52 * @param src_linesize number of bytes between 2 vertically adjacent
53 * samples in both the source buffer
54 * @param block_w width of block
55 * @param block_h height of block
56 * @param src_x x coordinate of the top left sample of the block in the
57 * source buffer
58 * @param src_y y coordinate of the top left sample of the block in the
59 * source buffer
60 * @param w width of the source buffer
61 * @param h height of the source buffer
62 */
63 void (*emulated_edge_mc)(uint8_t *dst, const uint8_t *src,
64 ptrdiff_t dst_linesize,
65 ptrdiff_t src_linesize,
66 int block_w, int block_h,
67 int src_x, int src_y, int w, int h);
68
69 /**
70 * Prefetch memory into cache (if supported by hardware).
71 *
72 * @param buf pointer to buffer to prefetch memory from
73 * @param stride distance between two lines of buf (in bytes)
74 * @param h number of lines to prefetch
75 */
76 void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
77 } VideoDSPContext;
78
79 void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
80
81 /* for internal use only (i.e. called by ff_videodsp_init() */
82 void ff_videodsp_init_aarch64(VideoDSPContext *ctx, int bpc);
83 void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
84 void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
85 void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
86
87 #endif /* AVCODEC_VIDEODSP_H */