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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*/
#include "common/scummsys.h"
#ifdef USE_FLUIDSYNTH
#include "common/config-manager.h"
#include "sound/mpu401.h"
#include "sound/softsynth/emumidi.h"
#include <fluidsynth.h>
class MidiDriver_FluidSynth : public MidiDriver_Emulated {
private:
MidiChannel_MPU401 _midiChannels[16];
fluid_settings_t *_settings;
fluid_synth_t *_synth;
int _soundFont;
int _outputRate;
Audio::SoundHandle _handle;
protected:
// Because GCC complains about casting from const to non-const...
void setInt(const char *name, int val);
void setNum(const char *name, double num);
void setStr(const char *name, const char *str);
void generateSamples(int16 *buf, int len);
public:
MidiDriver_FluidSynth(Audio::Mixer *mixer);
int open();
void close();
void send(uint32 b);
MidiChannel *allocateChannel();
MidiChannel *getPercussionChannel();
// AudioStream API
bool isStereo() const { return true; }
int getRate() const { return _outputRate; }
};
// MidiDriver method implementations
MidiDriver_FluidSynth::MidiDriver_FluidSynth(Audio::Mixer *mixer)
: MidiDriver_Emulated(mixer) {
for (int i = 0; i < ARRAYSIZE(_midiChannels); i++) {
_midiChannels[i].init(this, i);
}
// It ought to be possible to get FluidSynth to generate samples at
// lower
_outputRate = _mixer->getOutputRate();
if (_outputRate < 22050)
_outputRate = 22050;
else if (_outputRate > 96000)
_outputRate = 96000;
}
void MidiDriver_FluidSynth::setInt(const char *name, int val) {
char *name2 = strdup(name);
fluid_settings_setint(_settings, name2, val);
free(name2);
}
void MidiDriver_FluidSynth::setNum(const char *name, double val) {
char *name2 = strdup(name);
fluid_settings_setnum(_settings, name2, val);
free(name2);
}
void MidiDriver_FluidSynth::setStr(const char *name, const char *val) {
char *name2 = strdup(name);
char *val2 = strdup(val);
fluid_settings_setstr(_settings, name2, val2);
free(name2);
free(val2);
}
int MidiDriver_FluidSynth::open() {
if (_isOpen)
return MERR_ALREADY_OPEN;
if (!ConfMan.hasKey("soundfont"))
error("FluidSynth requires a 'soundfont' setting");
_settings = new_fluid_settings();
// The default gain setting is ridiculously low - at least for me. This
// cannot be fixed by ScummVM's volume settings because they can only
// soften the sound, not amplify it, so instead we add an option to
// adjust the gain of FluidSynth itself.
double gain = (double)ConfMan.getInt("midi_gain") / 100.0;
setNum("synth.gain", gain);
setNum("synth.sample-rate", _outputRate);
_synth = new_fluid_synth(_settings);
// In theory, this ought to reduce CPU load... but it doesn't make any
// noticeable difference for me, so disable it for now.
// fluid_synth_set_interp_method(_synth, -1, FLUID_INTERP_LINEAR);
// fluid_synth_set_reverb_on(_synth, 0);
// fluid_synth_set_chorus_on(_synth, 0);
const char *soundfont = ConfMan.get("soundfont").c_str();
_soundFont = fluid_synth_sfload(_synth, soundfont, 1);
if (_soundFont == -1)
error("Failed loading custom sound font '%s'", soundfont);
MidiDriver_Emulated::open();
// The MT-32 emulator uses kSFXSoundType here. I don't know why.
_mixer->playInputStream(Audio::Mixer::kMusicSoundType, &_handle, this, -1, 255, 0, false, true);
return 0;
}
void MidiDriver_FluidSynth::close() {
if (!_isOpen)
return;
_isOpen = false;
_mixer->stopHandle(_handle);
if (_soundFont != -1)
fluid_synth_sfunload(_synth, _soundFont, 1);
delete_fluid_synth(_synth);
delete_fluid_settings(_settings);
}
void MidiDriver_FluidSynth::send(uint32 b) {
//byte param3 = (byte) ((b >> 24) & 0xFF);
uint param2 = (byte) ((b >> 16) & 0xFF);
uint param1 = (byte) ((b >> 8) & 0xFF);
byte cmd = (byte) (b & 0xF0);
byte chan = (byte) (b & 0x0F);
switch (cmd) {
case 0x80: // Note Off
fluid_synth_noteoff(_synth, chan, param1);
break;
case 0x90: // Note On
fluid_synth_noteon(_synth, chan, param1, param2);
break;
case 0xA0: // Aftertouch
break;
case 0xB0: // Control Change
fluid_synth_cc(_synth, chan, param1, param2);
break;
case 0xC0: // Program Change
fluid_synth_program_change(_synth, chan, param1);
break;
case 0xD0: // Channel Pressure
break;
case 0xE0: // Pitch Bend
fluid_synth_pitch_bend(_synth, chan, (param2 << 7) | param1);
break;
case 0xF0: // SysEx
// We should never get here! SysEx information has to be
// sent via high-level semantic methods.
warning("MidiDriver_FluidSynth: Receiving SysEx command on a send() call");
break;
default:
warning("MidiDriver_FluidSynth: Unknown send() command 0x%02X", cmd);
break;
}
}
MidiChannel *MidiDriver_FluidSynth::allocateChannel() {
for (int i = 0; i < ARRAYSIZE(_midiChannels); i++) {
if (i != 9 && _midiChannels[i].allocate())
return &_midiChannels[i];
}
return NULL;
}
MidiChannel *MidiDriver_FluidSynth::getPercussionChannel() {
return &_midiChannels[9];
}
MidiDriver *MidiDriver_FluidSynth_create(Audio::Mixer *mixer) {
return new MidiDriver_FluidSynth(mixer);
}
void MidiDriver_FluidSynth::generateSamples(int16 *data, int len) {
fluid_synth_write_s16(_synth, len, data, 0, 2, data, 1, 2);
}
#endif
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