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-rw-r--r--src/comparison.c135
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+/* Comparison plugin.
+ * Copyright 2005 Thorsten Wilms.
+ *
+ * This plugin 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 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This plugin 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
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#define _XOPEN_SOURCE 600 /* strdup */
+#include <stdlib.h>
+#include <string.h>
+
+#include <lv2/lv2plug.in/ns/lv2core/lv2.h>
+
+#include "lv2.h"
+
+#define COMP_BASE_ID 4440
+
+#define COMP_NUM_PORTS 6
+
+/* Port Numbers */
+#define COMP_A 0
+#define COMP_B 1
+#define COMP_LARGER 2
+#define COMP_SMALLER 3
+#define COMP_A_LARGER 4
+#define COMP_EQUAL 5
+
+/* All state information for plugin */
+typedef struct {
+ /* Ports */
+ float *a_buffer;
+ float *b_buffer;
+ float *larger_buffer;
+ float *smaller_buffer;
+ float *a_larger_buffer;
+ float *equal_buffer;
+} Comp;
+
+/* Construct a new plugin instance */
+static LV2_Handle
+instantiate(const LV2_Descriptor* descriptor,
+ double sample_rate,
+ const char* bundle_path,
+ const LV2_Feature* const* features)
+{
+ Comp* plugin = (Comp*)calloc(1, sizeof(Comp));
+
+ return (LV2_Handle)plugin;
+}
+
+/* Connect a port to a data location */
+static void
+connect_port(LV2_Handle instance,
+ uint32_t port,
+ void* data)
+{
+ Comp* plugin = (Comp*)instance;
+ switch (port) {
+ case COMP_A:
+ plugin->a_buffer = (float*)data;
+ break;
+ case COMP_B:
+ plugin->b_buffer = (float*)data;
+ break;
+ case COMP_LARGER:
+ plugin->larger_buffer = (float*)data;
+ break;
+ case COMP_SMALLER:
+ plugin->smaller_buffer = (float*)data;
+ break;
+ case COMP_A_LARGER:
+ plugin->a_larger_buffer = (float*)data;
+ break;
+ case COMP_EQUAL:
+ plugin->equal_buffer = (float*)data;
+ break;
+ }
+}
+
+static void
+run(LV2_Handle instance, uint32_t nframes)
+{
+ Comp* const plugin = (Comp*)instance;
+ const float* const a = plugin->a_buffer;
+ const float* const b = plugin->b_buffer;
+ float* const larger = plugin->larger_buffer;
+ float* const smaller = plugin->smaller_buffer;
+ float* const a_larger = plugin->a_larger_buffer;
+ float* const equal = plugin->equal_buffer;
+ unsigned long i;
+
+ for (i = 0; i < nframes; i++) {
+ equal[i] = (a[i] == b[i]) ? 1.0 : 0.0;
+ larger[i] = (a[i] > b[i]) ? a[i] : b[i];
+ smaller[i] = (a[i] < b[i]) ? a[i] : b[i];
+ a_larger[i] = (a[i] > b[i]) ? 1.0 : 0.0;
+ }
+}
+
+static void
+cleanup(LV2_Handle instance)
+{
+ free(instance);
+}
+
+static const LV2_Descriptor descriptor = {
+ "http://drobilla.net/plugins/omins/comparison",
+ instantiate,
+ connect_port,
+ NULL,
+ run,
+ NULL,
+ cleanup,
+ NULL,
+};
+
+LV2_SYMBOL_EXPORT const LV2_Descriptor*
+lv2_descriptor(uint32_t index)
+{
+ switch (index) {
+ case 0: return &descriptor;
+ default: return NULL;
+ }
+}