Add 'blip', an LV2 port of the LADSPA 'blop' collection.

git-svn-id: http://svn.drobilla.net/lad/trunk/plugins/blip.lv2@3525 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 189 insertions, 0 deletions

diff --git a/src/ratio.c b/src/ratio.c
new file mode 100644
index 0000000..33fc4e9
--- /dev/null
+++ b/src/ratio.c
@@ -0,0 +1,189 @@
+/*
+  An LV2 plugin to calculate the ratio of two signals.
+  Copyright 2011 David Robillard
+  Copyright 2004 Mike Rawes
+
+  This is free software: you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This software is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this software.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdlib.h>
+#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
+#include "math_func.h"
+#include "common.h"
+
+#define RATIO_NUMERATOR   0
+#define RATIO_DENOMINATOR 1
+#define RATIO_OUTPUT      2
+
+typedef struct {
+	float* numerator;
+	float* denominator;
+	float* output;
+} Ratio;
+
+static void
+cleanup(LV2_Handle instance)
+{
+	free(instance);
+}
+
+static void
+connect_port(LV2_Handle instance,
+             uint32_t   port,
+             void*      data)
+{
+	Ratio* plugin = (Ratio*)instance;
+
+	switch (port) {
+	case RATIO_NUMERATOR:
+		plugin->numerator = data;
+		break;
+	case RATIO_DENOMINATOR:
+		plugin->denominator = data;
+		break;
+	case RATIO_OUTPUT:
+		plugin->output = data;
+		break;
+	}
+}
+
+static LV2_Handle
+instantiate(const LV2_Descriptor*     descriptor,
+            double                    sample_rate,
+            const char*               bundle_path,
+            const LV2_Feature* const* features)
+{
+	Ratio* plugin = (Ratio*)malloc(sizeof(Ratio));
+
+	return (LV2_Handle)plugin;
+}
+
+static void
+runRatio_nada_oa(LV2_Handle instance,
+                 uint32_t   sample_count)
+{
+	Ratio* plugin = (Ratio*)instance;
+
+	/* Numerator (array of floats of length sample_count) */
+	float* numerator = plugin->numerator;
+
+	/* Denominator (array of floats of length sample_count) */
+	float* denominator = plugin->denominator;
+
+	/* Output (array of floats of length sample_count) */
+	float* output = plugin->output;
+
+	float n;
+	float d;
+
+	for (uint32_t s = 0; s < sample_count; ++s) {
+		n = numerator[s];
+		d = denominator[s];
+
+		d = COPYSIGNF(f_max(FABSF(d), 1e-16f), d);
+
+		output[s] = n / d;
+	}
+}
+
+static void
+runRatio_nadc_oa(LV2_Handle instance,
+                 uint32_t   sample_count)
+{
+	Ratio* plugin = (Ratio*)instance;
+
+	/* Numerator (array of floats of length sample_count) */
+	float* numerator = plugin->numerator;
+
+	/* Denominator (float value) */
+	float denominator = *(plugin->denominator);
+
+	/* Output (array of floats of length sample_count) */
+	float* output = plugin->output;
+
+	float n;
+
+	denominator = COPYSIGNF(f_max(FABSF(denominator), 1e-16f), denominator);
+
+	for (uint32_t s = 0; s < sample_count; ++s) {
+		n = numerator[s];
+
+		output[s] = n / denominator;
+	}
+}
+
+static void
+runRatio_ncda_oa(LV2_Handle instance,
+                 uint32_t   sample_count)
+{
+	Ratio* plugin = (Ratio*)instance;
+
+	/* Numerator (float value) */
+	float numerator = *(plugin->numerator);
+
+	/* Denominator (array of floats of length sample_count) */
+	float* denominator = plugin->denominator;
+
+	/* Output (array of floats of length sample_count) */
+	float* output = plugin->output;
+
+	float d;
+
+	for (uint32_t s = 0; s < sample_count; ++s) {
+		d = denominator[s];
+		d = COPYSIGNF(f_max(FABSF(d), 1e-16f), d);
+
+		output[s] = numerator / d;
+	}
+}
+
+static void
+runRatio_ncdc_oc(LV2_Handle instance,
+                 uint32_t   sample_count)
+{
+	Ratio* plugin = (Ratio*)instance;
+
+	/* Numerator (float value) */
+	float numerator = *(plugin->numerator);
+
+	/* Denominator (float value) */
+	float denominator = *(plugin->denominator);
+
+	/* Output Frequency (pointer to float value) */
+	float* output = plugin->output;
+
+	denominator = COPYSIGNF(f_max(FABSF(denominator), 1e-16f), denominator);
+
+	output[0] = numerator / denominator;
+}
+
+static const LV2_Descriptor descriptor = {
+	"http://drobilla.net/plugins/blip/ratio",
+	instantiate,
+	connect_port,
+	NULL,
+	runRatio_ncdc_oc,
+	NULL,
+	cleanup,
+	NULL,
+};
+
+LV2_SYMBOL_EXPORT const LV2_Descriptor*
+lv2_descriptor(uint32_t index)
+{
+	switch (index) {
+	case 0:  return &descriptor;
+	default: return NULL;
+	}
+}