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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 "config.h" | ||
20 | #include "libavutil/attributes.h" | ||
21 | #include "huffyuvencdsp.h" | ||
22 | #include "mathops.h" | ||
23 | |||
24 | // 0x00010001 or 0x0001000100010001 or whatever, depending on the cpu's native arithmetic size | ||
25 | #define pw_1 (ULONG_MAX / UINT16_MAX) | ||
26 | |||
27 | 488200 | static void diff_int16_c(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w){ | |
28 | long i; | ||
29 | #if !HAVE_FAST_UNALIGNED | ||
30 | if((long)src2 & (sizeof(long)-1)){ | ||
31 | for(i=0; i+3<w; i+=4){ | ||
32 | dst[i+0] = (src1[i+0]-src2[i+0]) & mask; | ||
33 | dst[i+1] = (src1[i+1]-src2[i+1]) & mask; | ||
34 | dst[i+2] = (src1[i+2]-src2[i+2]) & mask; | ||
35 | dst[i+3] = (src1[i+3]-src2[i+3]) & mask; | ||
36 | } | ||
37 | }else | ||
38 | #endif | ||
39 | { | ||
40 | 488200 | unsigned long pw_lsb = (mask >> 1) * pw_1; | |
41 | 488200 | unsigned long pw_msb = pw_lsb + pw_1; | |
42 | |||
43 |
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33838600 | for (i = 0; i <= w - (int)sizeof(long)/2; i += sizeof(long)/2) { |
44 | 33350400 | long a = *(long*)(src1+i); | |
45 | 33350400 | long b = *(long*)(src2+i); | |
46 | 33350400 | *(long*)(dst+i) = ((a|pw_msb) - (b&pw_lsb)) ^ ((a^b^pw_msb)&pw_msb); | |
47 | } | ||
48 | } | ||
49 |
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515100 | for (; i<w; i++) |
50 | 26900 | dst[i] = (src1[i] - src2[i]) & mask; | |
51 | 488200 | } | |
52 | |||
53 | ✗ | static void sub_hfyu_median_pred_int16_c(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w, int *left, int *left_top){ | |
54 | int i; | ||
55 | uint16_t l, lt; | ||
56 | |||
57 | ✗ | l = *left; | |
58 | ✗ | lt = *left_top; | |
59 | |||
60 | ✗ | for(i=0; i<w; i++){ | |
61 | ✗ | const int pred = mid_pred(l, src1[i], (l + src1[i] - lt) & mask); | |
62 | ✗ | lt = src1[i]; | |
63 | ✗ | l = src2[i]; | |
64 | ✗ | dst[i] = (l - pred) & mask; | |
65 | } | ||
66 | |||
67 | ✗ | *left = l; | |
68 | ✗ | *left_top = lt; | |
69 | ✗ | } | |
70 | |||
71 | 32 | av_cold void ff_huffyuvencdsp_init(HuffYUVEncDSPContext *c, enum AVPixelFormat pix_fmt) | |
72 | { | ||
73 | 32 | c->diff_int16 = diff_int16_c; | |
74 | 32 | c->sub_hfyu_median_pred_int16 = sub_hfyu_median_pred_int16_c; | |
75 | |||
76 | #if ARCH_X86 | ||
77 | 32 | ff_huffyuvencdsp_init_x86(c, pix_fmt); | |
78 | #endif | ||
79 | 32 | } | |
80 |