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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (echo.c). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <math.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
27 | #include <retro_miscellaneous.h> | |
28 | #include <libretro_dspfilter.h> | |
29 | ||
30 | struct delta_data | |
31 | { | |
32 | float intensity; | |
33 | float old[2]; | |
34 | }; | |
35 | ||
36 | static void delta_free(void *data) | |
37 | { | |
38 | free(data); | |
39 | } | |
40 | ||
41 | static void delta_process(void *data, struct dspfilter_output *output, | |
42 | const struct dspfilter_input *input) | |
43 | { | |
44 | unsigned i, c; | |
45 | struct delta_data *d = (struct delta_data*)data; | |
46 | float *out = output->samples; | |
47 | output->samples = input->samples; | |
48 | output->frames = input->frames; | |
49 | ||
50 | for (i = 0; i < input->frames; i++) | |
51 | { | |
52 | for (c = 0; c < 2; c++) | |
53 | { | |
54 | float current = *out; | |
55 | *out++ = current + (current - d->old[c]) * d->intensity; | |
56 | d->old[c] = current; | |
57 | } | |
58 | } | |
59 | } | |
60 | ||
61 | static void *delta_init(const struct dspfilter_info *info, | |
62 | const struct dspfilter_config *config, void *userdata) | |
63 | { | |
64 | struct delta_data *d = (struct delta_data*)calloc(1, sizeof(*d)); | |
65 | if (!d) | |
66 | return NULL; | |
67 | config->get_float(userdata, "intensity", &d->intensity, 5.0f); | |
68 | return d; | |
69 | } | |
70 | ||
71 | static const struct dspfilter_implementation delta_plug = { | |
72 | delta_init, | |
73 | delta_process, | |
74 | delta_free, | |
75 | DSPFILTER_API_VERSION, | |
76 | "Delta Sharpening", | |
77 | "crystalizer", | |
78 | }; | |
79 | ||
80 | #ifdef HAVE_FILTERS_BUILTIN | |
81 | #define dspfilter_get_implementation delta_dspfilter_get_implementation | |
82 | #endif | |
83 | ||
84 | const struct dspfilter_implementation *dspfilter_get_implementation(dspfilter_simd_mask_t mask) | |
85 | { | |
86 | return &delta_plug; | |
87 | } | |
88 | ||
89 | #undef dspfilter_get_implementation |