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1 : | chl | 433 | /***************************************************************************** |
2 : | Isibaar | 333 | * |
3 : | chl | 433 | * XVID MPEG-4 VIDEO CODEC |
4 : | edgomez | 651 | * - 8x8 block-based halfpel interpolation - |
5 : | Isibaar | 333 | * |
6 : | chl | 433 | * Copyright(C) 2002 Peter Ross <pross@xvid.org> |
7 : | * Copyright(C) 2002 MinChen <chenm002@163.com> | ||
8 : | Isibaar | 333 | * |
9 : | edgomez | 651 | * This file is part of XviD, a free MPEG-4 video encoder/decoder |
10 : | Isibaar | 333 | * |
11 : | edgomez | 651 | * XviD is free software; you can redistribute it and/or modify it |
12 : | * under the terms of the GNU General Public License as published by | ||
13 : | chl | 433 | * the Free Software Foundation; either version 2 of the License, or |
14 : | * (at your option) any later version. | ||
15 : | Isibaar | 333 | * |
16 : | chl | 433 | * This program is distributed in the hope that it will be useful, |
17 : | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
18 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
19 : | * GNU General Public License for more details. | ||
20 : | Isibaar | 333 | * |
21 : | chl | 433 | * You should have received a copy of the GNU General Public License |
22 : | * along with this program; if not, write to the Free Software | ||
23 : | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
24 : | Isibaar | 333 | * |
25 : | edgomez | 651 | * Under section 8 of the GNU General Public License, the copyright |
26 : | * holders of XVID explicitly forbid distribution in the following | ||
27 : | * countries: | ||
28 : | * | ||
29 : | * - Japan | ||
30 : | * - United States of America | ||
31 : | * | ||
32 : | * Linking XviD statically or dynamically with other modules is making a | ||
33 : | * combined work based on XviD. Thus, the terms and conditions of the | ||
34 : | * GNU General Public License cover the whole combination. | ||
35 : | * | ||
36 : | * As a special exception, the copyright holders of XviD give you | ||
37 : | * permission to link XviD with independent modules that communicate with | ||
38 : | * XviD solely through the VFW1.1 and DShow interfaces, regardless of the | ||
39 : | * license terms of these independent modules, and to copy and distribute | ||
40 : | * the resulting combined work under terms of your choice, provided that | ||
41 : | * every copy of the combined work is accompanied by a complete copy of | ||
42 : | * the source code of XviD (the version of XviD used to produce the | ||
43 : | * combined work), being distributed under the terms of the GNU General | ||
44 : | * Public License plus this exception. An independent module is a module | ||
45 : | * which is not derived from or based on XviD. | ||
46 : | * | ||
47 : | * Note that people who make modified versions of XviD are not obligated | ||
48 : | * to grant this special exception for their modified versions; it is | ||
49 : | * their choice whether to do so. The GNU General Public License gives | ||
50 : | * permission to release a modified version without this exception; this | ||
51 : | * exception also makes it possible to release a modified version which | ||
52 : | * carries forward this exception. | ||
53 : | * | ||
54 : | edgomez | 830 | * $Id: interpolate8x8.c,v 1.9 2003-02-11 21:56:31 edgomez Exp $ |
55 : | edgomez | 651 | * |
56 : | chl | 433 | ****************************************************************************/ |
57 : | Isibaar | 333 | |
58 : | #include "../portab.h" | ||
59 : | #include "interpolate8x8.h" | ||
60 : | |||
61 : | edgomez | 677 | /* function pointers */ |
62 : | Isibaar | 333 | INTERPOLATE8X8_PTR interpolate8x8_halfpel_h; |
63 : | INTERPOLATE8X8_PTR interpolate8x8_halfpel_v; | ||
64 : | INTERPOLATE8X8_PTR interpolate8x8_halfpel_hv; | ||
65 : | |||
66 : | |||
67 : | edgomez | 677 | /* dst = interpolate(src) */ |
68 : | Isibaar | 333 | |
69 : | void | ||
70 : | interpolate8x8_halfpel_h_c(uint8_t * const dst, | ||
71 : | const uint8_t * const src, | ||
72 : | const uint32_t stride, | ||
73 : | const uint32_t rounding) | ||
74 : | { | ||
75 : | uint32_t i, j; | ||
76 : | |||
77 : | for (j = 0; j < 8; j++) { | ||
78 : | for (i = 0; i < 8; i++) { | ||
79 : | |||
80 : | edgomez | 723 | int32_t tot = |
81 : | (int32_t) src[j * stride + i] + (int32_t) src[j * stride + i + 1]; | ||
82 : | Isibaar | 333 | |
83 : | edgomez | 723 | tot = (tot + 1 - rounding) >> 1; |
84 : | Isibaar | 333 | dst[j * stride + i] = (uint8_t) tot; |
85 : | } | ||
86 : | } | ||
87 : | } | ||
88 : | |||
89 : | |||
90 : | |||
91 : | void | ||
92 : | interpolate8x8_halfpel_v_c(uint8_t * const dst, | ||
93 : | const uint8_t * const src, | ||
94 : | const uint32_t stride, | ||
95 : | const uint32_t rounding) | ||
96 : | { | ||
97 : | uint32_t i, j; | ||
98 : | |||
99 : | for (j = 0; j < 8; j++) { | ||
100 : | for (i = 0; i < 8; i++) { | ||
101 : | edgomez | 723 | int32_t tot = |
102 : | (int32_t)src[j * stride + i] + (int32_t)src[j * stride + i + stride]; | ||
103 : | Isibaar | 333 | |
104 : | tot = ((tot + 1 - rounding) >> 1); | ||
105 : | dst[j * stride + i] = (uint8_t) tot; | ||
106 : | } | ||
107 : | } | ||
108 : | } | ||
109 : | |||
110 : | |||
111 : | void | ||
112 : | interpolate8x8_halfpel_hv_c(uint8_t * const dst, | ||
113 : | const uint8_t * const src, | ||
114 : | const uint32_t stride, | ||
115 : | const uint32_t rounding) | ||
116 : | { | ||
117 : | uint32_t i, j; | ||
118 : | |||
119 : | for (j = 0; j < 8; j++) { | ||
120 : | for (i = 0; i < 8; i++) { | ||
121 : | edgomez | 723 | int32_t tot = |
122 : | (int32_t)src[j * stride + i] + (int32_t)src[j * stride + i + 1] + | ||
123 : | (int32_t)src[j * stride + i + stride] + (int32_t)src[j * stride + i + stride + 1]; | ||
124 : | Isibaar | 333 | tot = ((tot + 2 - rounding) >> 2); |
125 : | dst[j * stride + i] = (uint8_t) tot; | ||
126 : | } | ||
127 : | } | ||
128 : | } | ||
129 : | |||
130 : | edgomez | 677 | /* add by MinChen <chenm001@163.com> */ |
131 : | /* interpolate8x8 two pred block */ | ||
132 : | Isibaar | 333 | void |
133 : | interpolate8x8_c(uint8_t * const dst, | ||
134 : | const uint8_t * const src, | ||
135 : | const uint32_t x, | ||
136 : | const uint32_t y, | ||
137 : | const uint32_t stride) | ||
138 : | { | ||
139 : | uint32_t i, j; | ||
140 : | |||
141 : | for (j = 0; j < 8; j++) { | ||
142 : | for (i = 0; i < 8; i++) { | ||
143 : | int32_t tot = | ||
144 : | edgomez | 723 | (((int32_t)src[(y + j) * stride + x + i] + |
145 : | (int32_t)dst[(y + j) * stride + x + i] + 1) >> 1); | ||
146 : | Isibaar | 333 | dst[(y + j) * stride + x + i] = (uint8_t) tot; |
147 : | } | ||
148 : | } | ||
149 : | } |
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