1 files changed, 156 insertions, 0 deletions
diff --git a/src/product.c b/src/product.c
new file mode 100644
index 0000000..5c0b488
--- /dev/null
+++ b/src/product.c
@@ -0,0 +1,156 @@
+/*
+  An LV2 plugin to calculate the product of two signals.
+  Copyright 2011 David Robillard
+  Copyright 2002 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"
+
+#define PRODUCT_INPUT1 0
+#define PRODUCT_INPUT2 1
+#define PRODUCT_OUTPUT 2
+
+typedef struct {
+	float* input1;
+	float* input2;
+	float* output;
+} Product;
+
+static void
+cleanup(LV2_Handle instance)
+{
+	free(instance);
+}
+
+static void
+connect_port(LV2_Handle instance,
+             uint32_t   port,
+             void*      data)
+{
+	Product* plugin = (Product*)instance;
+
+	switch (port) {
+	case PRODUCT_INPUT1:
+		plugin->input1 = data;
+		break;
+	case PRODUCT_INPUT2:
+		plugin->input2 = data;
+		break;
+	case PRODUCT_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)
+{
+	Product* plugin = (Product*)malloc(sizeof(Product));
+
+	return (LV2_Handle)plugin;
+}
+
+static void
+runProduct_iaia_oa(LV2_Handle instance,
+                   uint32_t   sample_count)
+{
+	Product* plugin = (Product*)instance;
+
+	/* First Input (array of floats of length sample_count) */
+	float* input1 = plugin->input1;
+
+	/* Second Input (array of floats of length sample_count) */
+	float* input2 = plugin->input2;
+
+	/* Output (array of floats of length sample_count) */
+	float* output = plugin->output;
+
+	float in1;
+	float in2;
+
+	for (uint32_t s = 0; s < sample_count; ++s) {
+		in1 = input1[s];
+		in2 = input2[s];
+
+		output[s] = in1 * in2;
+	}
+}
+
+static void
+runProduct_iaic_oa(LV2_Handle instance,
+                   uint32_t   sample_count)
+{
+	Product* plugin = (Product*)instance;
+
+	/* First Input (array of floats of length sample_count) */
+	float* input1 = plugin->input1;
+
+	/* Second Input (float value) */
+	float input2 = *(plugin->input2);
+
+	/* Output (array of floats of length sample_count) */
+	float* output = plugin->output;
+
+	float in1;
+
+	for (uint32_t s = 0; s < sample_count; ++s) {
+		in1 = input1[s];
+
+		output[s] = in1 * input2;
+	}
+}
+
+static void
+runProduct_icic_oc(LV2_Handle instance,
+                   uint32_t   sample_count)
+{
+	Product* plugin = (Product*)instance;
+
+	/* First Input (float value) */
+	float input1 = *(plugin->input1);
+
+	/* Second Input (float value) */
+	float input2 = *(plugin->input2);
+
+	/* Output (pointer to float value) */
+	float* output = plugin->output;
+
+	output[0] = input1 * input2;
+}
+
+static const LV2_Descriptor descriptor = {
+	"http://drobilla.net/plugins/blip/product",
+	instantiate,
+	connect_port,
+	NULL,
+	runProduct_icic_oc,
+	NULL,
+	cleanup,
+	NULL,
+};
+
+LV2_SYMBOL_EXPORT const LV2_Descriptor*
+lv2_descriptor(uint32_t index)
+{
+	switch (index) {
+	case 0:  return &descriptor;
+	default: return NULL;
+	}
+}