Add: Fluidsynth music driver support (jmak)

2 files changed, 198 insertions, 0 deletions

diff --git a/src/music/fluidsynth.cpp b/src/music/fluidsynth.cpp
new file mode 100644
index 000000000..63be1dd99
--- /dev/null
+++ b/src/music/fluidsynth.cpp
@@ -0,0 +1,157 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD 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, version 2.
+ * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file fluidsynth.cpp Playing music via the fluidsynth library. */
+
+#include "../stdafx.h"
+#include "../openttd.h"
+#include "../sound_type.h"
+#include "../debug.h"
+#include "fluidsynth.h"
+#include "midifile.hpp"
+#include <fluidsynth.h>
+
+static struct {
+	fluid_settings_t* settings;    ///< FluidSynth settings handle
+	fluid_synth_t* synth;          ///< FluidSynth synthesizer handle
+	fluid_audio_driver_t* adriver; ///< FluidSynth audio driver handle
+	fluid_player_t* player;        ///< FluidSynth MIDI player handle
+} _midi; ///< Metadata about the midi we're playing.
+
+/** Factory for the FluidSynth driver. */
+static FMusicDriver_FluidSynth iFMusicDriver_FluidSynth;
+
+/** List of sound fonts to try by default. */
+static const char *default_sf[] = {
+	/* Debian/Ubuntu/OpenSUSE preferred */
+	"/usr/share/sounds/sf2/FluidR3_GM.sf2",
+
+	/* RedHat/Fedora/Arch preferred */
+	"/usr/share/soundfonts/FluidR3_GM.sf2",
+
+	/* Debian/Ubuntu/OpenSUSE alternatives */
+	"/usr/share/sounds/sf2/TimGM6mb.sf2",
+	"/usr/share/sounds/sf2/FluidR3_GS.sf2",
+
+	NULL
+};
+
+const char *MusicDriver_FluidSynth::Start(const char * const *param)
+{
+	const char *driver_name = GetDriverParam(param, "driver");
+	const char *sfont_name = GetDriverParam(param, "soundfont");
+	int sfont_id;
+
+	if (!driver_name) driver_name = "alsa";
+
+	DEBUG(driver, 1, "Fluidsynth: driver %s, sf %s", driver_name, sfont_name);
+
+	/* Create the settings. */
+	_midi.settings = new_fluid_settings();
+	if (!_midi.settings) return "Could not create midi settings";
+
+	if (fluid_settings_setstr(_midi.settings, "audio.driver", driver_name) != 1) {
+		return "Could not set audio driver name";
+	}
+
+	/* Create the synthesizer. */
+	_midi.synth = new_fluid_synth(_midi.settings);
+	if (!_midi.synth) return "Could not open synth";
+
+	/* Create the audio driver. The synthesizer starts playing as soon
+	   as the driver is created. */
+	_midi.adriver = new_fluid_audio_driver(_midi.settings, _midi.synth);
+	if (!_midi.adriver) return "Could not open audio driver";
+
+	/* Load a SoundFont and reset presets (so that new instruments
+	 * get used from the SoundFont) */
+	if (!sfont_name) {
+		int i;
+		sfont_id = FLUID_FAILED;
+		for (i = 0; default_sf[i]; i++) {
+			if (!fluid_is_soundfont(default_sf[i])) continue;
+			sfont_id = fluid_synth_sfload(_midi.synth, default_sf[i], 1);
+			if (sfont_id != FLUID_FAILED) break;
+		}
+		if (sfont_id == FLUID_FAILED) return "Could not open any sound font";
+	} else {
+		sfont_id = fluid_synth_sfload(_midi.synth, sfont_name, 1);
+		if (sfont_id == FLUID_FAILED) return "Could not open sound font";
+	}
+
+	_midi.player = NULL;
+
+	return NULL;
+}
+
+void MusicDriver_FluidSynth::Stop()
+{
+	this->StopSong();
+	delete_fluid_audio_driver(_midi.adriver);
+	delete_fluid_synth(_midi.synth);
+	delete_fluid_settings(_midi.settings);
+}
+
+void MusicDriver_FluidSynth::PlaySong(const MusicSongInfo &song)
+{
+	std::string filename = MidiFile::GetSMFFile(song);
+
+	this->StopSong();
+
+	if (filename.empty()) {
+		return;
+	}
+
+	_midi.player = new_fluid_player(_midi.synth);
+	if (!_midi.player) {
+		DEBUG(driver, 0, "Could not create midi player");
+		return;
+	}
+
+	if (fluid_player_add(_midi.player, filename.c_str()) != FLUID_OK) {
+		DEBUG(driver, 0, "Could not open music file");
+		delete_fluid_player(_midi.player);
+		_midi.player = NULL;
+		return;
+	}
+	if (fluid_player_play(_midi.player) != FLUID_OK) {
+		DEBUG(driver, 0, "Could not start midi player");
+		delete_fluid_player(_midi.player);
+		_midi.player = NULL;
+		return;
+	}
+}
+
+void MusicDriver_FluidSynth::StopSong()
+{
+	if (!_midi.player) return;
+
+	fluid_player_stop(_midi.player);
+	if (fluid_player_join(_midi.player) != FLUID_OK) {
+		DEBUG(driver, 0, "Could not join player");
+	}
+	delete_fluid_player(_midi.player);
+	fluid_synth_system_reset(_midi.synth);
+	_midi.player = NULL;
+}
+
+bool MusicDriver_FluidSynth::IsSongPlaying()
+{
+	if (!_midi.player) return false;
+
+	return fluid_player_get_status(_midi.player) == FLUID_PLAYER_PLAYING;
+}
+
+void MusicDriver_FluidSynth::SetVolume(byte vol)
+{
+	/* Allowed range of synth.gain is 0.0 to 10.0 */
+	if (fluid_settings_setnum(_midi.settings, "synth.gain", 1.0 * vol / 128.0) != 1) {
+		DEBUG(driver, 0, "Could not set volume");
+	}
+}
diff --git a/src/music/fluidsynth.h b/src/music/fluidsynth.h
new file mode 100644
index 000000000..171128a8e
--- /dev/null
+++ b/src/music/fluidsynth.h
@@ -0,0 +1,41 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD 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, version 2.
+ * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file fluidsynth.h Base for FluidSynth music playback. */
+
+#ifndef MUSIC_FLUIDSYNTH_H
+#define MUSIC_FLUIDSYNTH_H
+
+#include "music_driver.hpp"
+
+/** Music driver making use of FluidSynth. */
+class MusicDriver_FluidSynth : public MusicDriver {
+public:
+	/* virtual */ const char *Start(const char * const *param);
+
+	/* virtual */ void Stop();
+
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
+
+	/* virtual */ void StopSong();
+
+	/* virtual */ bool IsSongPlaying();
+
+	/* virtual */ void SetVolume(byte vol);
+	/* virtual */ const char *GetName() const { return "fluidsynth"; }
+};
+
+/** Factory for the fluidsynth driver. */
+class FMusicDriver_FluidSynth : public DriverFactoryBase {
+public:
+	FMusicDriver_FluidSynth() : DriverFactoryBase(Driver::DT_MUSIC, 5, "fluidsynth", "FluidSynth MIDI Driver") {}
+	/* virtual */ Driver *CreateInstance() const { return new MusicDriver_FluidSynth(); }
+};
+
+#endif /* MUSIC_FLUIDSYNTH_H */