mirror of
https://github.com/libretro/libretro-common.git
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91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (echo.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include <retro_miscellaneous.h>
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#include <libretro_dspfilter.h>
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struct delta_data
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{
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float intensity;
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float old[2];
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};
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static void delta_free(void *data)
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{
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free(data);
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}
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static void delta_process(void *data, struct dspfilter_output *output,
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const struct dspfilter_input *input)
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{
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unsigned i, c;
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struct delta_data *d = (struct delta_data*)data;
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float *out = output->samples;
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output->samples = input->samples;
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output->frames = input->frames;
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for (i = 0; i < input->frames; i++)
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{
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for (c = 0; c < 2; c++)
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{
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float current = *out;
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*out++ = current + (current - d->old[c]) * d->intensity;
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d->old[c] = current;
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}
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}
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}
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static void *delta_init(const struct dspfilter_info *info,
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const struct dspfilter_config *config, void *userdata)
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{
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struct delta_data *d = (struct delta_data*)calloc(1, sizeof(*d));
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if (!d)
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return NULL;
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config->get_float(userdata, "intensity", &d->intensity, 5.0f);
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return d;
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}
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static const struct dspfilter_implementation delta_plug = {
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delta_init,
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delta_process,
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delta_free,
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DSPFILTER_API_VERSION,
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"Delta Sharpening",
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"crystalizer",
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};
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#ifdef HAVE_FILTERS_BUILTIN
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#define dspfilter_get_implementation delta_dspfilter_get_implementation
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#endif
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const struct dspfilter_implementation *dspfilter_get_implementation(dspfilter_simd_mask_t mask)
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{
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(void)mask;
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return &delta_plug;
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}
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#undef dspfilter_get_implementation
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