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                          */
  38                         FluidSynth (float samplerate, int polyphony = 32);
  39                         ~FluidSynth ();
  40
  41                         bool load_sf2 (const std::string& fn);
  42
  43                         bool synth (float* left, float* right, uint32_t n_samples);
  44                         bool midi_event (uint8_t const* const data, size_t len);
  45                         void panic ();
  46
  47                         /* load a preset
  48                          * @pgm BankProgram index
  49                          * @chan midi channel (0..15)
  50                          * @return true on succcess
  51                          */
  52                         bool select_program (uint32_t pgm, uint8_t chan);
  53
  54                         uint32_t program_count () const { return _presets.size(); }
  55
  56                         std::string program_name (uint32_t pgm) const {
  57                                 if (pgm >= _presets.size()) { return ""; }
  58                                 return _presets[pgm].name;
  59                         }
  60
  61                 private:
  62                         fluid_settings_t*   _settings;
  63                         fluid_synth_t*      _synth;
  64                         int                 _synth_id;
  65                         fluid_midi_event_t* _f_midi_event;
  66
  67                         struct BankProgram {
  68                                 BankProgram (const std::string& n, int b, int p)
  69                                         : name (n)
  70                                         , bank (b)
  71                                         , program (p)
  72                                 {}
  73
  74                                 BankProgram (const BankProgram& other)
  75                                         : name (other.name)
  76                                         , bank (other.bank)
  77                                         , program (other.program)
  78                                 {}
  79
  80                                 std::string name;
  81                                 int bank;
  82                                 int program;
  83                         };
  84
  85                         std::vector<BankProgram> _presets;
  86         };
  87
  88 } /* namespace */
  89 #endif