FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/lossless_videoencdsp.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 34 34 100.0%
Branches: 10 10 100.0%

Line Branch Exec Source
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 "lossless_videoencdsp.h"
22 #include "mathops.h"
23
24 // 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
25 #define pb_7f (~0UL / 255 * 0x7f)
26 #define pb_80 (~0UL / 255 * 0x80)
27
28 443915 static void diff_bytes_c(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, intptr_t w)
29 {
30 long i;
31
32 #if !HAVE_FAST_UNALIGNED
33 if (((long)src1 | (long)src2) & (sizeof(long) - 1)) {
34 for (i = 0; i + 7 < w; i += 8) {
35 dst[i + 0] = src1[i + 0] - src2[i + 0];
36 dst[i + 1] = src1[i + 1] - src2[i + 1];
37 dst[i + 2] = src1[i + 2] - src2[i + 2];
38 dst[i + 3] = src1[i + 3] - src2[i + 3];
39 dst[i + 4] = src1[i + 4] - src2[i + 4];
40 dst[i + 5] = src1[i + 5] - src2[i + 5];
41 dst[i + 6] = src1[i + 6] - src2[i + 6];
42 dst[i + 7] = src1[i + 7] - src2[i + 7];
43 }
44 } else
45 #endif
46
2/2
✓ Branch 0 taken 23878425 times.
✓ Branch 1 taken 443915 times.
24322340 for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
47 23878425 long a = *(long *) (src1 + i);
48 23878425 long b = *(long *) (src2 + i);
49 23878425 *(long *) (dst + i) = ((a | pb_80) - (b & pb_7f)) ^
50 23878425 ((a ^ b ^ pb_80) & pb_80);
51 }
52
2/2
✓ Branch 0 taken 28636 times.
✓ Branch 1 taken 443915 times.
472551 for (; i < w; i++)
53 28636 dst[i + 0] = src1[i + 0] - src2[i + 0];
54 443915 }
55
56 215200 static void sub_median_pred_c(uint8_t *dst, const uint8_t *src1,
57 const uint8_t *src2, intptr_t w,
58 int *left, int *left_top)
59 {
60 int i;
61 uint8_t l, lt;
62
63 215200 l = *left;
64 215200 lt = *left_top;
65
66
2/2
✓ Branch 0 taken 68182400 times.
✓ Branch 1 taken 215200 times.
68397600 for (i = 0; i < w; i++) {
67 68182400 const int pred = mid_pred(l, src1[i], (l + src1[i] - lt) & 0xFF);
68 68182400 lt = src1[i];
69 68182400 l = src2[i];
70 68182400 dst[i] = l - pred;
71 }
72
73 215200 *left = l;
74 215200 *left_top = lt;
75 215200 }
76
77 803 static void sub_left_predict_c(uint8_t *dst, uint8_t *src,
78 ptrdiff_t stride, ptrdiff_t width, int height)
79 {
80 int i, j;
81 803 uint8_t prev = 0x80; /* Set the initial value */
82
2/2
✓ Branch 0 taken 216048 times.
✓ Branch 1 taken 803 times.
216851 for (j = 0; j < height; j++) {
83
2/2
✓ Branch 0 taken 68429568 times.
✓ Branch 1 taken 216048 times.
68645616 for (i = 0; i < width; i++) {
84 68429568 *dst++ = src[i] - prev;
85 68429568 prev = src[i];
86 }
87 216048 src += stride;
88 }
89 803 }
90
91 192 av_cold void ff_llvidencdsp_init(LLVidEncDSPContext *c)
92 {
93 192 c->diff_bytes = diff_bytes_c;
94 192 c->sub_median_pred = sub_median_pred_c;
95 192 c->sub_left_predict = sub_left_predict_c;
96
97 if (ARCH_X86)
98 192 ff_llvidencdsp_init_x86(c);
99 192 }
100