FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/huffyuvdsp.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 32 41 78.0%
Branches: 6 8 75.0%

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 <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 134100 static void add_int16_c(uint16_t *dst, const uint16_t *src, unsigned mask, int w){
30 long i;
31 134100 unsigned long pw_lsb = (mask >> 1) * pw_1;
32 134100 unsigned long pw_msb = pw_lsb + pw_1;
33
2/2
✓ Branch 0 taken 11404800 times.
✓ Branch 1 taken 134100 times.
11538900 for (i = 0; i <= w - (int)sizeof(long)/2; i += sizeof(long)/2) {
34 11404800 long a = *(long*)(src+i);
35 11404800 long b = *(long*)(dst+i);
36 11404800 *(long*)(dst+i) = ((a&pw_lsb) + (b&pw_lsb)) ^ ((a^b)&pw_msb);
37 }
38
2/2
✓ Branch 0 taken 9900 times.
✓ Branch 1 taken 134100 times.
144000 for(; i<w; i++)
39 9900 dst[i] = (dst[i] + src[i]) & mask;
40 134100 }
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
2/2
✓ Branch 0 taken 30528000 times.
✓ Branch 1 taken 89800 times.
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 85 av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c, enum AVPixelFormat pix_fmt)
84 {
85 85 c->add_int16 = add_int16_c;
86 85 c->add_hfyu_median_pred_int16 = add_hfyu_median_pred_int16_c;
87 85 c->add_hfyu_left_pred_bgr32 = add_hfyu_left_pred_bgr32_c;
88
89 if (ARCH_X86)
90 85 ff_huffyuvdsp_init_x86(c, pix_fmt);
91 85 }
92