Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * Half-pel DSP functions. | |
3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard | |
4 | * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * Half-pel DSP functions. | |
26 | */ | |
27 | ||
28 | #ifndef AVCODEC_HPELDSP_H | |
29 | #define AVCODEC_HPELDSP_H | |
30 | ||
31 | #include <stdint.h> | |
32 | #include <stddef.h> | |
33 | ||
34 | /* add and put pixel (decoding) */ | |
35 | // blocksizes for hpel_pixels_func are 8x4,8x8 16x8 16x16 | |
36 | // h for hpel_pixels_func is limited to {width/2, width} but never larger | |
37 | // than 16 and never smaller than 4 | |
38 | typedef void (*op_pixels_func)(uint8_t *block /*align width (8 or 16)*/, | |
39 | const uint8_t *pixels /*align 1*/, | |
40 | ptrdiff_t line_size, int h); | |
41 | ||
42 | /** | |
43 | * Half-pel DSP context. | |
44 | */ | |
45 | typedef struct HpelDSPContext { | |
46 | /** | |
47 | * Halfpel motion compensation with rounding (a+b+1)>>1. | |
48 | * this is an array[4][4] of motion compensation functions for 4 | |
49 | * horizontal blocksizes (8,16) and the 4 halfpel positions<br> | |
50 | * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] | |
51 | * @param block destination where the result is stored | |
52 | * @param pixels source | |
53 | * @param line_size number of bytes in a horizontal line of block | |
54 | * @param h height | |
55 | */ | |
56 | op_pixels_func put_pixels_tab[4][4]; | |
57 | ||
58 | /** | |
59 | * Halfpel motion compensation with rounding (a+b+1)>>1. | |
60 | * This is an array[4][4] of motion compensation functions for 4 | |
61 | * horizontal blocksizes (8,16) and the 4 halfpel positions<br> | |
62 | * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] | |
63 | * @param block destination into which the result is averaged (a+b+1)>>1 | |
64 | * @param pixels source | |
65 | * @param line_size number of bytes in a horizontal line of block | |
66 | * @param h height | |
67 | */ | |
68 | op_pixels_func avg_pixels_tab[4][4]; | |
69 | ||
70 | /** | |
71 | * Halfpel motion compensation with no rounding (a+b)>>1. | |
72 | * this is an array[4][4] of motion compensation functions for 2 | |
73 | * horizontal blocksizes (8,16) and the 4 halfpel positions<br> | |
74 | * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ] | |
75 | * @param block destination where the result is stored | |
76 | * @param pixels source | |
77 | * @param line_size number of bytes in a horizontal line of block | |
78 | * @param h height | |
79 | */ | |
80 | op_pixels_func put_no_rnd_pixels_tab[4][4]; | |
81 | ||
82 | /** | |
83 | * Halfpel motion compensation with no rounding (a+b)>>1. | |
84 | * this is an array[4] of motion compensation functions for 1 | |
85 | * horizontal blocksize (16) and the 4 halfpel positions<br> | |
86 | * *pixels_tab[0][ xhalfpel + 2*yhalfpel ] | |
87 | * @param block destination into which the result is averaged (a+b)>>1 | |
88 | * @param pixels source | |
89 | * @param line_size number of bytes in a horizontal line of block | |
90 | * @param h height | |
91 | */ | |
92 | op_pixels_func avg_no_rnd_pixels_tab[4]; | |
93 | } HpelDSPContext; | |
94 | ||
95 | void ff_hpeldsp_init(HpelDSPContext *c, int flags); | |
96 | ||
97 | void ff_hpeldsp_init_aarch64(HpelDSPContext *c, int flags); | |
98 | void ff_hpeldsp_init_alpha(HpelDSPContext *c, int flags); | |
99 | void ff_hpeldsp_init_arm(HpelDSPContext *c, int flags); | |
100 | void ff_hpeldsp_init_ppc(HpelDSPContext *c, int flags); | |
101 | void ff_hpeldsp_init_x86(HpelDSPContext *c, int flags); | |
102 | ||
103 | #endif /* AVCODEC_HPELDSP_H */ |