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