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/* $Id$ */
/*
* 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 libtimidity.cpp Playing music via the timidity library. */
#include "../stdafx.h"
#include "../openttd.h"
#include "../sound_type.h"
#include "../debug.h"
#include "libtimidity.h"
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
#include <sys/stat.h>
#include <errno.h>
#include <timidity.h>
#include "../safeguards.h"
/** The state of playing. */
enum MidiState {
MIDI_STOPPED = 0,
MIDI_PLAYING = 1,
};
static struct {
MidIStream *stream;
MidSongOptions options;
MidSong *song;
MidiState status;
uint32 song_length;
uint32 song_position;
} _midi; ///< Metadata about the midi we're playing.
/** Factory for the libtimidity driver. */
static FMusicDriver_LibTimidity iFMusicDriver_LibTimidity;
const char *MusicDriver_LibTimidity::Start(const char * const *param)
{
_midi.status = MIDI_STOPPED;
_midi.song = NULL;
if (mid_init(param == NULL ? NULL : const_cast<char *>(param[0])) < 0) {
/* If init fails, it can be because no configuration was found.
* If it was not forced via param, try to load it without a
* configuration. Who knows that works. */
if (param != NULL || mid_init_no_config() < 0) {
return "error initializing timidity";
}
}
DEBUG(driver, 1, "successfully initialised timidity");
_midi.options.rate = 44100;
_midi.options.format = MID_AUDIO_S16LSB;
_midi.options.channels = 2;
_midi.options.buffer_size = _midi.options.rate;
return NULL;
}
void MusicDriver_LibTimidity::Stop()
{
if (_midi.status == MIDI_PLAYING) this->StopSong();
mid_exit();
}
void MusicDriver_LibTimidity::PlaySong(const char *filename)
{
this->StopSong();
_midi.stream = mid_istream_open_file(filename);
if (_midi.stream == NULL) {
DEBUG(driver, 0, "Could not open music file");
return;
}
_midi.song = mid_song_load(_midi.stream, &_midi.options);
mid_istream_close(_midi.stream);
_midi.song_length = mid_song_get_total_time(_midi.song);
if (_midi.song == NULL) {
DEBUG(driver, 1, "Invalid MIDI file");
return;
}
mid_song_start(_midi.song);
_midi.status = MIDI_PLAYING;
}
void MusicDriver_LibTimidity::StopSong()
{
_midi.status = MIDI_STOPPED;
/* mid_song_free cannot handle NULL! */
if (_midi.song != NULL) mid_song_free(_midi.song);
_midi.song = NULL;
}
bool MusicDriver_LibTimidity::IsSongPlaying()
{
if (_midi.status == MIDI_PLAYING) {
_midi.song_position = mid_song_get_time(_midi.song);
if (_midi.song_position >= _midi.song_length) {
_midi.status = MIDI_STOPPED;
_midi.song_position = 0;
}
}
return (_midi.status == MIDI_PLAYING);
}
void MusicDriver_LibTimidity::SetVolume(byte vol)
{
if (_midi.song != NULL) mid_song_set_volume(_midi.song, vol);
}
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