FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/lossless_videodsp.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 54 55 98.2%
Branches: 15 16 93.8%

Line Branch Exec Source
1 /*
2 * Lossless video DSP utils
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "config.h"
22 #include "lossless_videodsp.h"
23 #include "libavcodec/mathops.h"
24
25 // 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
26 #define pb_7f (~0UL / 255 * 0x7f)
27 #define pb_80 (~0UL / 255 * 0x80)
28
29 29379 static void add_bytes_c(uint8_t *dst, uint8_t *src, ptrdiff_t w)
30 {
31 long i;
32
33
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2420803 for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
34 2391424 long a = *(long *) (src + i);
35 2391424 long b = *(long *) (dst + i);
36 2391424 *(long *) (dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80);
37 }
38
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29379 for (; i < w; i++)
39 dst[i + 0] += src[i + 0];
40 29379 }
41
42 47711 static void add_median_pred_c(uint8_t *dst, const uint8_t *src1,
43 const uint8_t *diff, ptrdiff_t w,
44 int *left, int *left_top)
45 {
46 int i;
47 uint8_t l, lt;
48
49 47711 l = *left;
50 47711 lt = *left_top;
51
52
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28823039 for (i = 0; i < w; i++) {
53 28775328 l = mid_pred(l, src1[i], (l + src1[i] - lt) & 0xFF) + diff[i];
54 28775328 lt = src1[i];
55 28775328 dst[i] = l;
56 }
57
58 47711 *left = l;
59 47711 *left_top = lt;
60 47711 }
61
62 363456 static int add_left_pred_c(uint8_t *dst, const uint8_t *src, ptrdiff_t w,
63 int acc)
64 {
65 int i;
66
67
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50470128 for (i = 0; i < w - 1; i++) {
68 50106672 acc += src[i];
69 50106672 dst[i] = acc;
70 50106672 i++;
71 50106672 acc += src[i];
72 50106672 dst[i] = acc;
73 }
74
75
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368972 for (; i < w; i++) {
76 5516 acc += src[i];
77 5516 dst[i] = acc;
78 }
79
80 363456 return acc;
81 }
82
83 359203 static int add_left_pred_int16_c(uint16_t *dst, const uint16_t *src, unsigned mask, ptrdiff_t w, unsigned acc){
84 int i;
85
86
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49967479 for(i=0; i<w-1; i++){
87 49608276 acc+= src[i];
88 49608276 dst[i]= acc &= mask;
89 49608276 i++;
90 49608276 acc+= src[i];
91 49608276 dst[i]= acc &= mask;
92 }
93
94
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364303 for(; i<w; i++){
95 5100 acc+= src[i];
96 5100 dst[i]= acc &= mask;
97 }
98
99 359203 return acc;
100 }
101
102 2697 static void add_gradient_pred_c(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width){
103 int A, B, C, i;
104
105
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405569 for (i = 0; i < width; i++) {
106 402872 A = src[i - stride];
107 402872 B = src[i - (stride + 1)];
108 402872 C = src[i - 1];
109 402872 src[i] = (A - B + C + src[i]) & 0xFF;
110 }
111 2697 }
112
113 178 void ff_llviddsp_init(LLVidDSPContext *c)
114 {
115 178 c->add_bytes = add_bytes_c;
116 178 c->add_median_pred = add_median_pred_c;
117 178 c->add_left_pred = add_left_pred_c;
118
119 178 c->add_left_pred_int16 = add_left_pred_int16_c;
120 178 c->add_gradient_pred = add_gradient_pred_c;
121
122 if (ARCH_PPC)
123 ff_llviddsp_init_ppc(c);
124 if (ARCH_X86)
125 178 ff_llviddsp_init_x86(c);
126 178 }
127