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2ba45a60 DM |
1 | /* |
2 | * This file is part of FFmpeg. | |
3 | * | |
4 | * FFmpeg is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * FFmpeg is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with FFmpeg; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #include <stdint.h> | |
20 | ||
21 | #include "config.h" | |
22 | #include "libavutil/attributes.h" | |
23 | #include "mathops.h" | |
24 | #include "huffyuvdsp.h" | |
25 | ||
26 | // 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size | |
27 | #define pb_7f (~0UL / 255 * 0x7f) | |
28 | #define pb_80 (~0UL / 255 * 0x80) | |
29 | ||
30 | static void add_bytes_c(uint8_t *dst, uint8_t *src, intptr_t w) | |
31 | { | |
32 | long i; | |
33 | ||
34 | for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) { | |
35 | long a = *(long *) (src + i); | |
36 | long b = *(long *) (dst + i); | |
37 | *(long *) (dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80); | |
38 | } | |
39 | for (; i < w; i++) | |
40 | dst[i + 0] += src[i + 0]; | |
41 | } | |
42 | ||
43 | static void add_hfyu_median_pred_c(uint8_t *dst, const uint8_t *src1, | |
44 | const uint8_t *diff, intptr_t w, | |
45 | int *left, int *left_top) | |
46 | { | |
47 | int i; | |
48 | uint8_t l, lt; | |
49 | ||
50 | l = *left; | |
51 | lt = *left_top; | |
52 | ||
53 | for (i = 0; i < w; i++) { | |
54 | l = mid_pred(l, src1[i], (l + src1[i] - lt) & 0xFF) + diff[i]; | |
55 | lt = src1[i]; | |
56 | dst[i] = l; | |
57 | } | |
58 | ||
59 | *left = l; | |
60 | *left_top = lt; | |
61 | } | |
62 | ||
63 | static int add_hfyu_left_pred_c(uint8_t *dst, const uint8_t *src, intptr_t w, | |
64 | int acc) | |
65 | { | |
66 | int i; | |
67 | ||
68 | for (i = 0; i < w - 1; i++) { | |
69 | acc += src[i]; | |
70 | dst[i] = acc; | |
71 | i++; | |
72 | acc += src[i]; | |
73 | dst[i] = acc; | |
74 | } | |
75 | ||
76 | for (; i < w; i++) { | |
77 | acc += src[i]; | |
78 | dst[i] = acc; | |
79 | } | |
80 | ||
81 | return acc; | |
82 | } | |
83 | ||
84 | static void add_hfyu_left_pred_bgr32_c(uint8_t *dst, const uint8_t *src, | |
85 | intptr_t w, uint8_t *left) | |
86 | { | |
87 | int i; | |
88 | uint8_t r = left[R], g = left[G], b = left[B], a = left[A]; | |
89 | ||
90 | for (i = 0; i < w; i++) { | |
91 | b += src[4 * i + B]; | |
92 | g += src[4 * i + G]; | |
93 | r += src[4 * i + R]; | |
94 | a += src[4 * i + A]; | |
95 | ||
96 | dst[4 * i + B] = b; | |
97 | dst[4 * i + G] = g; | |
98 | dst[4 * i + R] = r; | |
99 | dst[4 * i + A] = a; | |
100 | } | |
101 | ||
102 | left[B] = b; | |
103 | left[G] = g; | |
104 | left[R] = r; | |
105 | left[A] = a; | |
106 | } | |
107 | ||
108 | av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c) | |
109 | { | |
110 | c->add_bytes = add_bytes_c; | |
111 | c->add_hfyu_median_pred = add_hfyu_median_pred_c; | |
112 | c->add_hfyu_left_pred = add_hfyu_left_pred_c; | |
113 | c->add_hfyu_left_pred_bgr32 = add_hfyu_left_pred_bgr32_c; | |
114 | ||
115 | if (ARCH_X86) | |
116 | ff_huffyuvdsp_init_x86(c); | |
117 | } |