FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/jpeg2000dsp.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 38 38 100.0%
Branches: 6 6 100.0%

Line Branch Exec Source
1 /*
2 * JPEG 2000 DSP functions
3 * Copyright (c) 2007 Kamil Nowosad
4 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "config.h"
24 #include "libavutil/attributes.h"
25 #include "jpeg2000dsp.h"
26
27 /* Inverse ICT parameters in float and integer.
28 * int value = (float value) * (1<<16) */
29 static const float f_ict_params[4] = {
30 1.402f,
31 0.34413f,
32 0.71414f,
33 1.772f
34 };
35
36 static const int i_ict_params[4] = {
37 91881,
38 22553,
39 46802,
40 116130
41 };
42
43 3 static void ict_float(void *_src0, void *_src1, void *_src2, int csize)
44 {
45 3 float *src0 = _src0, *src1 = _src1, *src2 = _src2;
46 float i0f, i1f, i2f;
47 int i;
48
49
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1539 for (i = 0; i < csize; i++) {
50 1536 i0f = *src0 + (f_ict_params[0] * *src2);
51 1536 i1f = *src0 - (f_ict_params[1] * *src1)
52 1536 - (f_ict_params[2] * *src2);
53 1536 i2f = *src0 + (f_ict_params[3] * *src1);
54 1536 *src0++ = i0f;
55 1536 *src1++ = i1f;
56 1536 *src2++ = i2f;
57 }
58 3 }
59
60 3 static void ict_int(void *_src0, void *_src1, void *_src2, int csize)
61 {
62 3 int32_t *src0 = _src0, *src1 = _src1, *src2 = _src2;
63 int32_t i0, i1, i2;
64 int i;
65
66
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6220803 for (i = 0; i < csize; i++) {
67 6220800 i0 = *src0 + *src2 + ((int)((26345U * *src2) + (1 << 15)) >> 16);
68 6220800 i1 = *src0 - ((int)(((unsigned)i_ict_params[1] * *src1) + (1 << 15)) >> 16)
69 6220800 - ((int)(((unsigned)i_ict_params[2] * *src2) + (1 << 15)) >> 16);
70 6220800 i2 = *src0 + (2 * *src1) + ((int)((-14942U * *src1) + (1 << 15)) >> 16);
71 6220800 *src0++ = i0;
72 6220800 *src1++ = i1;
73 6220800 *src2++ = i2;
74 }
75 3 }
76
77 3 static void rct_int(void *_src0, void *_src1, void *_src2, int csize)
78 {
79 3 int32_t *src0 = _src0, *src1 = _src1, *src2 = _src2;
80 int32_t i0, i1, i2;
81 int i;
82
83
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1539 for (i = 0; i < csize; i++) {
84 1536 i1 = *src0 - (*src2 + *src1 >> 2);
85 1536 i0 = i1 + *src2;
86 1536 i2 = i1 + *src1;
87 1536 *src0++ = i0;
88 1536 *src1++ = i1;
89 1536 *src2++ = i2;
90 }
91 3 }
92
93 32 av_cold void ff_jpeg2000dsp_init(Jpeg2000DSPContext *c)
94 {
95 32 c->mct_decode[FF_DWT97] = ict_float;
96 32 c->mct_decode[FF_DWT53] = rct_int;
97 32 c->mct_decode[FF_DWT97_INT] = ict_int;
98
99 if (ARCH_X86)
100 32 ff_jpeg2000dsp_init_x86(c);
101 32 }
102