Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/huffyuvdsp.c |
Date: | 2022-07-04 19:11:22 |
Exec | Total | Coverage | |
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Lines: | 32 | 41 | 78.0% |
Branches: | 6 | 8 | 75.0% |
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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 | // 0x00010001 or 0x0001000100010001 or whatever, depending on the cpu's native arithmetic size | ||
27 | #define pw_1 (ULONG_MAX / UINT16_MAX) | ||
28 | |||
29 | 134106 | static void add_int16_c(uint16_t *dst, const uint16_t *src, unsigned mask, int w){ | |
30 | long i; | ||
31 | 134106 | unsigned long pw_lsb = (mask >> 1) * pw_1; | |
32 | 134106 | unsigned long pw_msb = pw_lsb + pw_1; | |
33 |
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11540634 | for (i = 0; i <= w - (int)sizeof(long)/2; i += sizeof(long)/2) { |
34 | 11406528 | long a = *(long*)(src+i); | |
35 | 11406528 | long b = *(long*)(dst+i); | |
36 | 11406528 | *(long*)(dst+i) = ((a&pw_lsb) + (b&pw_lsb)) ^ ((a^b)&pw_msb); | |
37 | } | ||
38 |
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144006 | for(; i<w; i++) |
39 | 9900 | dst[i] = (dst[i] + src[i]) & mask; | |
40 | 134106 | } | |
41 | |||
42 | ✗ | static void add_hfyu_median_pred_int16_c(uint16_t *dst, const uint16_t *src, const uint16_t *diff, unsigned mask, int w, int *left, int *left_top){ | |
43 | int i; | ||
44 | uint16_t l, lt; | ||
45 | |||
46 | ✗ | l = *left; | |
47 | ✗ | lt = *left_top; | |
48 | |||
49 | ✗ | for(i=0; i<w; i++){ | |
50 | ✗ | l = (mid_pred(l, src[i], (l + src[i] - lt) & mask) + diff[i]) & mask; | |
51 | ✗ | lt = src[i]; | |
52 | ✗ | dst[i] = l; | |
53 | } | ||
54 | |||
55 | ✗ | *left = l; | |
56 | ✗ | *left_top = lt; | |
57 | } | ||
58 | |||
59 | 89800 | static void add_hfyu_left_pred_bgr32_c(uint8_t *dst, const uint8_t *src, | |
60 | intptr_t w, uint8_t *left) | ||
61 | { | ||
62 | int i; | ||
63 | 89800 | uint8_t r = left[R], g = left[G], b = left[B], a = left[A]; | |
64 | |||
65 |
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30617800 | for (i = 0; i < w; i++) { |
66 | 30528000 | b += src[4 * i + B]; | |
67 | 30528000 | g += src[4 * i + G]; | |
68 | 30528000 | r += src[4 * i + R]; | |
69 | 30528000 | a += src[4 * i + A]; | |
70 | |||
71 | 30528000 | dst[4 * i + B] = b; | |
72 | 30528000 | dst[4 * i + G] = g; | |
73 | 30528000 | dst[4 * i + R] = r; | |
74 | 30528000 | dst[4 * i + A] = a; | |
75 | } | ||
76 | |||
77 | 89800 | left[B] = b; | |
78 | 89800 | left[G] = g; | |
79 | 89800 | left[R] = r; | |
80 | 89800 | left[A] = a; | |
81 | 89800 | } | |
82 | |||
83 | 98 | av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c, enum AVPixelFormat pix_fmt) | |
84 | { | ||
85 | 98 | c->add_int16 = add_int16_c; | |
86 | 98 | c->add_hfyu_median_pred_int16 = add_hfyu_median_pred_int16_c; | |
87 | 98 | c->add_hfyu_left_pred_bgr32 = add_hfyu_left_pred_bgr32_c; | |
88 | |||
89 | #if ARCH_X86 | ||
90 | 98 | ff_huffyuvdsp_init_x86(c, pix_fmt); | |
91 | #endif | ||
92 | 98 | } | |
93 |