| 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 |