git subrepo clone https://github.com/libretro/libretro-common.git deps/libretro-common

[pcsx_rearmed.git] / deps / libretro-common / audio / dsp_filters / crystalizer.c

diff --git a/deps/libretro-common/audio/dsp_filters/crystalizer.c b/deps/libretro-common/audio/dsp_filters/crystalizer.c
new file mode 100644 (file)
index 0000000..8ccecd8
--- /dev/null
+++ b/deps/libretro-common/audio/dsp_filters/crystalizer.c
@@ -0,0 +1,89 @@
+/* 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