add basic libardour wrapper for fluidsynth (for Lua bindings)

1 files changed, 90 insertions, 0 deletions

diff --git a/libs/ardour/ardour/fluid_synth.h b/libs/ardour/ardour/fluid_synth.h
new file mode 100644
index 0000000000..80fdea2f50
--- /dev/null
+++ b/libs/ardour/ardour/fluid_synth.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2016 Robin Gareus <robin@gareus.org>
+ *
+ * This program 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 program 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 program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+#ifndef _ardour_fluidsynth_h_
+#define _ardour_fluidsynth_h_
+
+#include <stdint.h>
+#include <string.h>
+#include <glib.h>
+
+#include "ardour/libardour_visibility.h"
+#include "ardour/types.h"
+
+#include "fluidsynth.h"
+
+namespace ARDOUR {
+
+	class LIBARDOUR_API FluidSynth {
+		public:
+			/** instantiate a Synth
+			 *
+			 * @param samplerate samplerate
+			 */
+			FluidSynth (float samplerate, int polyphony = 32);
+			~FluidSynth ();
+
+			bool load_sf2 (const std::string& fn);
+
+			bool synth (float* left, float* right, uint32_t n_samples);
+			bool midi_event (uint8_t const* const data, size_t len);
+			void panic ();
+
+			/* load a preset 
+			 * @pgm BankProgram index
+			 * @chan midi channel (0..15)
+			 * @return true on succcess
+			 */
+			bool select_program (uint32_t pgm, uint8_t chan);
+
+			uint32_t program_count () const { return _presets.size(); }
+
+			std::string program_name (uint32_t pgm) const {
+				if (pgm >= _presets.size()) { return ""; }
+				return _presets[pgm].name;
+			}
+
+		private:
+			fluid_settings_t*   _settings;
+			fluid_synth_t*      _synth;
+			int                 _synth_id;
+			fluid_midi_event_t* _f_midi_event;
+
+			struct BankProgram {
+				BankProgram (const std::string& n, int b, int p)
+					: name (n)
+					, bank (b)
+					, program (p)
+				{}
+
+				BankProgram (const BankProgram& other)
+					: name (other.name)
+					, bank (other.bank)
+					, program (other.program)
+				{}
+
+				std::string name;
+				int bank;
+				int program;
+			};
+
+			std::vector<BankProgram> _presets;
+	};
+
+} /* namespace */
+#endif