FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/huffyuvencdsp.c
Date: 2021-09-24 03:35:22
Exec Total Coverage
Lines: 15 25 60.0%
Branches: 4 6 66.7%

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 "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, AVCodecContext *avctx)
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, avctx);
78 32 }
79