libs/ardour/ardour/fluid_synth.h

   1 /*
   2  * Copyright (C) 2016 Robin Gareus <robin@gareus.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18 #ifndef _ardour_fluidsynth_h_
  19 #define _ardour_fluidsynth_h_
  20
  21 #include <stdint.h>
  22 #include <string.h>
  23 #include <glib.h>
  24
  25 #include "ardour/libardour_visibility.h"
  26 #include "ardour/types.h"
  27
  28 #include "fluidsynth.h"
  29
  30 namespace ARDOUR {
  31
  32         class LIBARDOUR_API FluidSynth {
  33                 public:
  34                         /** instantiate a Synth
  35                          *
  36                          * @param samplerate samplerate
  37                          * @param polyphony polyphony
  38                          */
  39                         FluidSynth (float samplerate, int polyphony = 32);
  40                         ~FluidSynth ();
  41
  42                         bool load_sf2 (const std::string& fn);
  43
  44                         bool synth (float* left, float* right, uint32_t n_samples);
  45                         bool midi_event (uint8_t const* const data, size_t len);
  46                         void panic ();
  47
  48                         /* load a preset
  49                          * @pgm BankProgram index
  50                          * @chan midi channel (0..15)
  51                          * @return true on succcess
  52                          */
  53                         bool select_program (uint32_t pgm, uint8_t chan);
  54
  55                         uint32_t program_count () const { return _presets.size(); }
  56
  57                         std::string program_name (uint32_t pgm) const {
  58                                 if (pgm >= _presets.size()) { return ""; }
  59                                 return _presets[pgm].name;
  60                         }
  61
  62                 private:
  63                         fluid_settings_t*   _settings;
  64                         fluid_synth_t*      _synth;
  65                         int                 _synth_id;
  66                         fluid_midi_event_t* _f_midi_event;
  67
  68                         struct BankProgram {
  69                                 BankProgram (const std::string& n, int b, int p)
  70                                         : name (n)
  71                                         , bank (b)
  72                                         , program (p)
  73                                 {}
  74
  75                                 BankProgram (const BankProgram& other)
  76                                         : name (other.name)
  77                                         , bank (other.bank)
  78                                         , program (other.program)
  79                                 {}
  80
  81                                 std::string name;
  82                                 int bank;
  83                                 int program;
  84                         };
  85
  86                         std::vector<BankProgram> _presets;
  87         };
  88
  89 } /* namespace */
  90 #endif