Add preliminary C++ work.

1 files changed, 78 insertions, 0 deletions

diff --git a/plugins/eg-amppp.lv2/amppp.cpp b/plugins/eg-amppp.lv2/amppp.cpp
new file mode 100644
index 0000000..ac939c0
--- /dev/null
+++ b/plugins/eg-amppp.lv2/amppp.cpp
@@ -0,0 +1,78 @@
+/*
+  Copyright 2015 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <math.h>
+#include <stdlib.h>
+
+#include "lv2/lv2plug.in/ns/lv2core/Plugin.hpp"
+
+class Amppp : public lv2::Plugin {
+public:
+	Amppp(double                    rate,
+	      const char*               bundle_path,
+	      const LV2_Feature* const* features)
+		: Plugin(rate, bundle_path, features)
+	{}
+
+	typedef enum {
+		AMP_GAIN   = 0,
+		AMP_INPUT  = 1,
+		AMP_OUTPUT = 2
+	} PortIndex;
+
+	void connect_port(uint32_t port, void* data) {
+		switch ((PortIndex)port) {
+		case AMP_GAIN:
+			m_ports.gain = (const float*)data;
+			break;
+		case AMP_INPUT:
+			m_ports.input = (const float*)data;
+			break;
+		case AMP_OUTPUT:
+			m_ports.output = (float*)data;
+			break;
+		}
+	}
+
+	#define DB_CO(g) ((g) > -90.0f ? powf(10.0f, (g) * 0.05f) : 0.0f)
+
+	void run(uint32_t n_samples) {
+		const float coef = DB_CO(*m_ports.gain);
+		for (uint32_t pos = 0; pos < n_samples; pos++) {
+			m_ports.output[pos] = m_ports.input[pos] * coef;
+		}
+	}
+
+private:
+	typedef struct {
+		const float* gain;
+		const float* input;
+		float*       output;
+	} Ports;
+
+	Ports m_ports;
+};
+
+static const LV2_Descriptor descriptor = lv2::descriptor<Amppp>("http://lv2plug.in/plugins/eg-amppp");
+
+LV2_SYMBOL_EXPORT const LV2_Descriptor*
+lv2_descriptor(uint32_t index)
+{
+	switch (index) {
+	case 0:  return &descriptor;
+	default: return NULL;
+	}
+}