src/fluidsynth.cpp

   1 /* Calf DSP Library
   2  * Fluidsynth wrapper
   3  *
   4  * Copyright (C) 2001-2007 Krzysztof Foltman
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA  02110-1301  USA
  20  */
  21 #include <calf/giface.h>
  22 #include <calf/modules_dev.h>
  23 #include <calf/utils.h>
  24 #include <string.h>
  25
  26 #if ENABLE_EXPERIMENTAL
  27
  28 using namespace dsp;
  29 using namespace calf_plugins;
  30 using namespace std;
  31
  32 fluidsynth_audio_module::fluidsynth_audio_module()
  33 {
  34     settings = NULL;
  35     synth = NULL;
  36     status_serial = 1;
  37     std::fill(set_presets, set_presets + 16, -1);
  38     std::fill(last_selected_presets, last_selected_presets + 16, -1);
  39 }
  40
  41 void fluidsynth_audio_module::post_instantiate(uint32_t sr)
  42 {
  43     srate = sr;
  44     settings = new_fluid_settings();
  45     synth = create_synth(sfid);
  46     soundfont_loaded = sfid != -1;
  47 }
  48
  49 void fluidsynth_audio_module::activate()
  50 {
  51 }
  52
  53 void fluidsynth_audio_module::deactivate()
  54 {
  55 }
  56
  57 fluid_synth_t *fluidsynth_audio_module::create_synth(int &new_sfid)
  58 {
  59     std::fill(set_presets, set_presets + 16, -1);
  60     fluid_settings_t *new_settings = new_fluid_settings();
  61     fluid_settings_setnum(new_settings, "synth.sample-rate", srate);
  62     fluid_synth_t *s = new_fluid_synth(new_settings);
  63     if (!soundfont.empty())
  64     {
  65         int sid = fluid_synth_sfload(s, soundfont.c_str(), 1);
  66         if (sid == -1)
  67         {
  68             delete_fluid_synth(s);
  69             return NULL;
  70         }
  71         assert(sid >= 0);
  72         printf("sid=%d\n", sid);
  73         fluid_synth_sfont_select(s, 0, sid);
  74         new_sfid = sid;
  75
  76         fluid_sfont_t* sfont = fluid_synth_get_sfont(s, 0);
  77         soundfont_name = (*sfont->get_name)(sfont);
  78
  79         sfont->iteration_start(sfont);
  80
  81         string preset_list;
  82         fluid_preset_t tmp;
  83         int first_preset = -1;
  84         while(sfont->iteration_next(sfont, &tmp))
  85         {
  86             string pname = tmp.get_name(&tmp);
  87             int bank = tmp.get_banknum(&tmp);
  88             int num = tmp.get_num(&tmp);
  89             int id = num + 128 * bank;
  90             sf_preset_names[id] = pname;
  91             preset_list += calf_utils::i2s(id) + "\t" + pname + "\n";
  92             if (first_preset == -1)
  93                 first_preset = id;
  94         }
  95         if (first_preset != -1)
  96         {
  97             fluid_synth_bank_select(s, 0, first_preset >> 7);
  98             fluid_synth_program_change(s, 0, first_preset & 127);
  99         }
 100         soundfont_preset_list = preset_list;
 101     }
 102     else
 103         new_sfid = -1;
 104     return s;
 105 }
 106
 107 void fluidsynth_audio_module::note_on(int channel, int note, int vel)
 108 {
 109     fluid_synth_noteon(synth, channel, note, vel);
 110 }
 111
 112 void fluidsynth_audio_module::note_off(int channel, int note, int vel)
 113 {
 114     fluid_synth_noteoff(synth, channel, note);
 115 }
 116
 117 void fluidsynth_audio_module::control_change(int channel, int controller, int value)
 118 {
 119     fluid_synth_cc(synth, channel, controller, value);
 120
 121     if (controller == 0 || controller == 32)
 122         update_preset_num(channel);
 123 }
 124
 125 void fluidsynth_audio_module::program_change(int channel, int program)
 126 {
 127     fluid_synth_program_change(synth, channel, program);
 128
 129     update_preset_num(channel);
 130 }
 131
 132
 133 void fluidsynth_audio_module::update_preset_num(int channel)
 134 {
 135     fluid_preset_t *p = fluid_synth_get_channel_preset(synth, channel);
 136     if (p)
 137         last_selected_presets[channel] = p->get_num(p) + 128 * p->get_banknum(p);
 138     else
 139         last_selected_presets[channel] = -1;
 140     status_serial++;
 141 }
 142
 143 void fluidsynth_audio_module::select_preset_in_channel(int channel, int new_preset)
 144 {
 145     fluid_synth_bank_select(synth, channel, new_preset >> 7);
 146     fluid_synth_program_change(synth, channel, new_preset & 127);
 147     last_selected_presets[channel] = new_preset;
 148 }
 149
 150 uint32_t fluidsynth_audio_module::process(uint32_t offset, uint32_t nsamples, uint32_t inputs_mask, uint32_t outputs_mask)
 151 {
 152     static const int interp_lens[] = { 0, 1, 4, 7 };
 153     for (int i = 0; i < 16; ++i)
 154     {
 155         int new_preset = set_presets[i];
 156         if (new_preset != -1 && soundfont_loaded)
 157         {
 158             // XXXKF yeah there's a tiny chance of race here, have to live with it until I write some utility classes for lock-free data passing
 159             set_presets[i] = -1;
 160             select_preset_in_channel(i, new_preset);
 161         }
 162     }
 163     if (!soundfont_loaded)
 164     {
 165         // Reset selected presets array to 'no preset'
 166         std::fill(last_selected_presets, last_selected_presets + 16, -1);
 167     }
 168     fluid_synth_set_interp_method(synth, -1, interp_lens[dsp::clip<int>(fastf2i_drm(*params[par_interpolation]), 0, 3)]);
 169     fluid_synth_set_reverb_on(synth, *params[par_reverb] > 0);
 170     fluid_synth_set_chorus_on(synth, *params[par_chorus] > 0);
 171     fluid_synth_set_gain(synth, *params[par_master]);
 172     fluid_synth_write_float(synth, nsamples, outs[0], offset, 1, outs[1], offset, 1);
 173     return 3;
 174 }
 175
 176 char *fluidsynth_audio_module::configure(const char *key, const char *value)
 177 {
 178     if (!strncmp(key, "preset_key_set", 14))
 179     {
 180         int ch = atoi(key + 14);
 181         if (ch > 0)
 182             ch--;
 183         if (ch >= 0 && ch <= 15)
 184             set_presets[ch] = value ? atoi(value) : 0;
 185         return NULL;
 186     }
 187     if (!strcmp(key, "soundfont"))
 188     {
 189         if (value && *value)
 190         {
 191             printf("Loading %s\n", value);
 192             soundfont = value;
 193         }
 194         else
 195         {
 196             printf("Creating a blank synth\n");
 197             soundfont.clear();
 198         }
 199         // First synth not yet created - defer creation up to post_instantiate
 200         if (!synth)
 201             return NULL;
 202         int newsfid = -1;
 203         fluid_synth_t *new_synth = create_synth(newsfid);
 204         soundfont_loaded = newsfid != -1;
 205
 206         status_serial++;
 207
 208         if (new_synth)
 209         {
 210             synth = new_synth;
 211             sfid = newsfid;
 212             for (int i = 0; i < 16; ++i)
 213                 update_preset_num(i);
 214         }
 215         else
 216             return strdup("Cannot load a soundfont");
 217         // XXXKF memory leak
 218     }
 219     return NULL;
 220 }
 221
 222 void fluidsynth_audio_module::send_configures(send_configure_iface *sci)
 223 {
 224     sci->send_configure("soundfont", soundfont.c_str());
 225     sci->send_configure("preset_key_set", calf_utils::i2s(last_selected_presets[0]).c_str());
 226     for (int i = 1; i < 16; ++i)
 227     {
 228         string key = "preset_key_set" + calf_utils::i2s(i + 1);
 229         sci->send_configure(key.c_str(), calf_utils::i2s(last_selected_presets[i]).c_str());
 230     }
 231 }
 232
 233 int fluidsynth_audio_module::send_status_updates(send_updates_iface *sui, int last_serial)
 234 {
 235     int cur_serial = status_serial;
 236     if (cur_serial != last_serial)
 237     {
 238         sui->send_status("sf_name", soundfont_name.c_str());
 239         sui->send_status("preset_list", soundfont_preset_list.c_str());
 240         for (int i = 0; i < 16; ++i)
 241         {
 242             string id = i ? calf_utils::i2s(i + 1) : string();
 243             string key = "preset_key" + id;
 244             sui->send_status(key.c_str(), calf_utils::i2s(last_selected_presets[i]).c_str());
 245             key = "preset_name" + id;
 246             map<uint32_t, string>::const_iterator it = sf_preset_names.find(last_selected_presets[i]);
 247             if (it == sf_preset_names.end())
 248                 sui->send_status(key.c_str(), "");
 249             else
 250                 sui->send_status(key.c_str(), it->second.c_str());
 251         }
 252     }
 253     return cur_serial;
 254 }
 255
 256 fluidsynth_audio_module::~fluidsynth_audio_module()
 257 {
 258     if (synth) {
 259         delete_fluid_synth(synth);
 260         synth = NULL;
 261     }
 262     if (settings) {
 263         // delete_fluid_settings(settings);
 264         settings = NULL;
 265     }
 266 }
 267
 268 #endif