1 files changed, 109 insertions, 0 deletions
diff --git a/src/server/internals/Note.hpp b/src/server/internals/Note.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_INTERNALS_NOTE_HPP
+#define INGEN_INTERNALS_NOTE_HPP
+
+#include "InternalBlock.hpp"
+#include "types.hpp"
+
+namespace Ingen {
+namespace Server {
+
+class InputPort;
+class OutputPort;
+class InternalPlugin;
+
+namespace Internals {
+
+/** MIDI note input block.
+ *
+ * For pitched instruments like keyboard, etc.
+ *
+ * \ingroup engine
+ */
+class NoteNode : public InternalBlock
+{
+public:
+	NoteNode(InternalPlugin*     plugin,
+	         BufferFactory&      bufs,
+	         const Raul::Symbol& symbol,
+	         bool                polyphonic,
+	         GraphImpl*          parent,
+	         SampleRate          srate);
+
+	bool prepare_poly(BufferFactory& bufs, uint32_t poly);
+	bool apply_poly(RunContext& context, uint32_t poly);
+
+	void run(RunContext& context);
+
+	void note_on(RunContext& context, uint8_t note_num, uint8_t velocity, FrameTime time);
+	void note_off(RunContext& context, uint8_t note_num, FrameTime time);
+	void all_notes_off(RunContext& context, FrameTime time);
+
+	void sustain_on(RunContext& context, FrameTime time);
+	void sustain_off(RunContext& context, FrameTime time);
+
+	void bend(RunContext& context, FrameTime time, float amount);
+	void note_pressure(RunContext& context, FrameTime time, uint8_t note_num, float amount);
+	void channel_pressure(RunContext& context, FrameTime time, float amount);
+
+	static InternalPlugin* internal_plugin(URIs& uris);
+
+private:
+	/** Key, one for each key on the keyboard */
+	struct Key {
+		enum class State { OFF, ON_ASSIGNED, ON_UNASSIGNED };
+		Key() : state(State::OFF), voice(0), time(0) {}
+		State       state;
+		uint32_t    voice;
+		SampleCount time;
+	};
+
+	/** Voice, one of these always exists for each voice */
+	struct Voice {
+		enum class State { FREE, ACTIVE, HOLDING };
+		Voice() : state(State::FREE), note(0), time(0) {}
+		State       state;
+		uint8_t     note;
+		SampleCount time;
+	};
+
+    typedef Raul::Array<Voice> Voices;
+
+	void free_voice(RunContext& context, uint32_t voice, FrameTime time);
+
+	MPtr<Voices> _voices;
+	MPtr<Voices> _prepared_voices;
+
+	Key  _keys[128];
+	bool _sustain;  ///< Whether or not hold pedal is depressed
+
+	InputPort*  _midi_in_port;
+	OutputPort* _freq_port;
+	OutputPort* _num_port;
+	OutputPort* _vel_port;
+	OutputPort* _gate_port;
+	OutputPort* _trig_port;
+	OutputPort* _bend_port;
+	OutputPort* _pressure_port;
+};
+
+} // namespace Server
+} // namespace Ingen
+} // namespace Internals
+
+#endif // INGEN_INTERNALS_NOTE_HPP