FFmpeg
videodsp.h
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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 
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);
78 
79 void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
80 
81 /* for internal use only (i.e. called by ff_videodsp_init() */
87 
88 #endif /* AVCODEC_VIDEODSP_H */
#define src
Definition: vp8dsp.c:254
uint8_t
void ff_videodsp_init_aarch64(VideoDSPContext *ctx, int bpc)
Definition: videodsp_init.c:26
#define prefetch(p)
Definition: asm.h:88
#define EMULATED_EDGE(depth)
Definition: videodsp.h:32
uint8_t w
Definition: llviddspenc.c:38
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
AVFormatContext * ctx
Definition: movenc.c:48
void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:33
void ff_videodsp_init_mips(VideoDSPContext *ctx, int bpc)
Definition: videodsp_init.c:46
void * buf
Definition: avisynth_c.h:766
void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc)
void ff_videodsp_init(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:38
#define stride
void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc)