1 files changed, 96 insertions, 0 deletions
diff --git a/examples/plugins/Amp-swh.lv2/amp.c b/examples/plugins/Amp-swh.lv2/amp.c
new file mode 100644
index 0000000..a30c4bd
--- /dev/null
+++ b/examples/plugins/Amp-swh.lv2/amp.c
@@ -0,0 +1,96 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include <math.h>
+
+#include "lv2.h"
+
+#ifdef WIN32
+#define SYMBOL_EXPORT __declspec(dllexport)
+#else
+#define SYMBOL_EXPORT
+#endif
+
+#define AMP_URI       "http://plugin.org.uk/swh-plugins/amp";
+#define AMP_GAIN      0
+#define AMP_INPUT     1
+#define AMP_OUTPUT    2
+
+static LV2_Descriptor *ampDescriptor = NULL;
+
+typedef struct {
+	float *gain;
+	float *input;
+	float *output;
+} Amp;
+
+static void cleanupAmp(LV2_Handle instance) {
+	free(instance);
+}
+
+static void connectPortAmp(LV2_Handle instance, unsigned long port,
+			   void *data) {
+	Amp *plugin = (Amp *)instance;
+
+	switch (port) {
+	case AMP_GAIN:
+		plugin->gain = data;
+		break;
+	case AMP_INPUT:
+		plugin->input = data;
+		break;
+	case AMP_OUTPUT:
+		plugin->output = data;
+		break;
+	}
+}
+
+static LV2_Handle instantiateAmp(const LV2_Descriptor *descriptor,
+	    unsigned long s_rate, const char *path , const LV2_Host_Feature **features) {
+	Amp *plugin_data = (Amp *)malloc(sizeof(Amp));
+
+	return (LV2_Handle)plugin_data;
+}
+
+#define DB_CO(g) ((g) > -90.0f ? powf(10.0f, (g) * 0.05f) : 0.0f)
+
+static void runAmp(LV2_Handle instance, unsigned long sample_count) {
+	Amp *plugin_data = (Amp *)instance;
+
+	const float gain = *(plugin_data->gain);
+	const float * const input = plugin_data->input;
+	float * const output = plugin_data->output;
+
+	unsigned long pos;
+	float coef = DB_CO(gain);
+
+	for (pos = 0; pos < sample_count; pos++) {
+		output[pos] = input[pos] * coef;
+	}
+}
+
+static void init() {
+	ampDescriptor =
+	 (LV2_Descriptor *)malloc(sizeof(LV2_Descriptor));
+
+	ampDescriptor->URI = AMP_URI;
+	ampDescriptor->activate = NULL;
+	ampDescriptor->cleanup = cleanupAmp;
+	ampDescriptor->connect_port = connectPortAmp;
+	ampDescriptor->deactivate = NULL;
+	ampDescriptor->instantiate = instantiateAmp;
+	ampDescriptor->run = runAmp;
+}
+
+SYMBOL_EXPORT
+const LV2_Descriptor *lv2_descriptor(unsigned long index) {
+	if (!ampDescriptor) init();
+
+	switch (index) {
+	case 0:
+		return ampDescriptor;
+	default:
+		return NULL;
+	}
+}
+