144 lines
3.9 KiB
C++
144 lines
3.9 KiB
C++
/*
|
|
* Copyright (C) 2016-2019 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.
|
|
*/
|
|
|
|
#include "pbd/failed_constructor.h"
|
|
#include "ardour/fluid_synth.h"
|
|
|
|
using namespace ARDOUR;
|
|
|
|
FluidSynth::FluidSynth (float samplerate, int polyphony)
|
|
: _settings (0)
|
|
, _synth (0)
|
|
, _f_midi_event (0)
|
|
{
|
|
_settings = new_fluid_settings ();
|
|
|
|
if (!_settings) {
|
|
throw failed_constructor ();
|
|
}
|
|
|
|
_f_midi_event = new_fluid_midi_event ();
|
|
|
|
if (!_f_midi_event) {
|
|
throw failed_constructor ();
|
|
}
|
|
|
|
fluid_settings_setnum (_settings, "synth.sample-rate", samplerate);
|
|
fluid_settings_setint (_settings, "synth.threadsafe-api", 0);
|
|
|
|
_synth = new_fluid_synth (_settings);
|
|
|
|
fluid_synth_set_gain (_synth, 1.0f);
|
|
fluid_synth_set_polyphony (_synth, polyphony);
|
|
fluid_synth_set_sample_rate (_synth, (float)samplerate);
|
|
}
|
|
|
|
FluidSynth::~FluidSynth ()
|
|
{
|
|
delete_fluid_synth (_synth);
|
|
delete_fluid_settings (_settings);
|
|
delete_fluid_midi_event (_f_midi_event);
|
|
}
|
|
|
|
bool
|
|
FluidSynth::load_sf2 (const std::string& fn)
|
|
{
|
|
_synth_id = fluid_synth_sfload (_synth, fn.c_str (), 1);
|
|
if (_synth_id == FLUID_FAILED) {
|
|
return false;
|
|
}
|
|
|
|
fluid_sfont_t* const sfont = fluid_synth_get_sfont_by_id (_synth, _synth_id);
|
|
if (!sfont) {
|
|
return false;
|
|
}
|
|
|
|
size_t count;
|
|
fluid_preset_t* preset;
|
|
|
|
fluid_sfont_iteration_start (sfont);
|
|
for (count = 0; (preset = fluid_sfont_iteration_next (sfont)) != 0; ++count) {
|
|
if (count < 16) {
|
|
fluid_synth_program_select (_synth, count, _synth_id, fluid_preset_get_banknum (preset), fluid_preset_get_num (preset));
|
|
}
|
|
_presets.push_back (BankProgram (
|
|
fluid_preset_get_name (preset),
|
|
fluid_preset_get_banknum (preset),
|
|
fluid_preset_get_num (preset)));
|
|
}
|
|
if (count == 0) {
|
|
return false;
|
|
}
|
|
|
|
/* bootstrap synth engine. The first call re-initializes the chorus
|
|
* (fluid_rvoice_mixer_set_samplerate) which is not rt-safe.
|
|
*/
|
|
float l[1024];
|
|
float r[1024];
|
|
fluid_synth_all_notes_off (_synth, -1);
|
|
fluid_synth_all_sounds_off (_synth, -1);
|
|
fluid_synth_write_float (_synth, 1024, l, 0, 1, r, 0, 1);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
FluidSynth::select_program (uint32_t pgm, uint8_t chan)
|
|
{
|
|
if (pgm >= _presets.size ()) {
|
|
return false;
|
|
}
|
|
const BankProgram& bp = _presets[pgm];
|
|
return FLUID_OK == fluid_synth_program_select (_synth, chan, _synth_id, bp.bank, bp.program);
|
|
}
|
|
|
|
void
|
|
FluidSynth::panic ()
|
|
{
|
|
fluid_synth_all_notes_off (_synth, -1);
|
|
fluid_synth_all_sounds_off (_synth, -1);
|
|
}
|
|
|
|
bool
|
|
FluidSynth::synth (float* left, float* right, uint32_t n_samples)
|
|
{
|
|
return FLUID_OK == fluid_synth_write_float (_synth, n_samples, left, 0, 1, right, 0, 1);
|
|
}
|
|
|
|
bool
|
|
FluidSynth::midi_event (uint8_t const* const data, size_t len)
|
|
{
|
|
if (len > 3) {
|
|
return false;
|
|
}
|
|
fluid_midi_event_set_type (_f_midi_event, data[0] & 0xf0);
|
|
fluid_midi_event_set_channel (_f_midi_event, data[0] & 0x0f);
|
|
if (len > 1) {
|
|
fluid_midi_event_set_key (_f_midi_event, data[1]);
|
|
}
|
|
if (len > 2) {
|
|
if (0xe0 /*PITCH_BEND*/ == fluid_midi_event_get_type (_f_midi_event)) {
|
|
fluid_midi_event_set_value (_f_midi_event, 0);
|
|
fluid_midi_event_set_pitch (_f_midi_event, ((data[2] & 0x7f) << 7) | (data[1] & 0x7f));
|
|
} else {
|
|
fluid_midi_event_set_value (_f_midi_event, data[2]);
|
|
}
|
|
}
|
|
return FLUID_OK == fluid_synth_handle_midi_event (_synth, _f_midi_event);
|
|
}
|