bjarni@6268: /* $Id$ */
KUDr@6254: 
KUDr@6254: #include "../stdafx.h"
KUDr@6254: #include "../openttd.h"
KUDr@6254: #include "../sound.h"
KUDr@6254: #include "../string.h"
KUDr@6254: #include "../variables.h"
KUDr@6254: #include "../debug.h"
KUDr@6254: #include "libtimidity.h"
KUDr@6254: #include <fcntl.h>
KUDr@6254: #include <sys/types.h>
KUDr@6254: #include <sys/wait.h>
KUDr@6254: #include <unistd.h>
KUDr@6254: #include <signal.h>
KUDr@6254: #include <sys/stat.h>
KUDr@6254: #include <errno.h>
KUDr@6254: #include <timidity.h>
KUDr@6254: #if defined(PSP)
KUDr@6254: #include <pspaudiolib.h>
KUDr@6254: #endif /* PSP */
KUDr@6254: 
KUDr@6254: enum MidiState {
KUDr@6254: 	MIDI_STOPPED = 0,
KUDr@6254: 	MIDI_PLAYING = 1,
KUDr@6254: };
KUDr@6254: 
KUDr@6254: static struct {
KUDr@6254: 	MidIStream *stream;
KUDr@6254: 	MidSongOptions options;
KUDr@6254: 	MidSong *song;
KUDr@6254: 
KUDr@6254: 	MidiState status;
KUDr@6254: 	uint32 song_length;
KUDr@6254: 	uint32 song_position;
KUDr@6254: } _midi;
KUDr@6254: 
KUDr@6254: #if defined(PSP)
KUDr@6254: static void AudioOutCallback(void *buf, unsigned int _reqn, void *userdata)
KUDr@6254: {
KUDr@6254: 	memset(buf, 0, _reqn * PSP_NUM_AUDIO_CHANNELS);
KUDr@6254: 	if (_midi.status == MIDI_PLAYING) {
KUDr@6254: 		mid_song_read_wave(_midi.song, buf, _reqn * PSP_NUM_AUDIO_CHANNELS);
KUDr@6254: 	}
KUDr@6254: }
KUDr@6254: #endif /* PSP */
KUDr@6254: 
KUDr@6254: static const char *LibtimidityMidiStart(const char *const *param)
KUDr@6254: {
KUDr@6254: 	_midi.status = MIDI_STOPPED;
KUDr@6254: 
KUDr@6254: 	if (mid_init(param == NULL ? NULL : (char *)param[0]) < 0) {
KUDr@6254: 		/* If init fails, it can be because no configuration was found.
KUDr@6254: 		 *  If it was not forced via param, try to load it without a
KUDr@6254: 		 *  configuration. Who knows that works. */
KUDr@6254: 		if (param != NULL || mid_init_no_config() < 0) {
KUDr@6254: 			DEBUG(driver, 0, "error initializing timidity");
KUDr@6254: 			return NULL;
KUDr@6254: 		}
KUDr@6254: 	}
KUDr@6254: 	DEBUG(driver, 1, "successfully initialised timidity");
KUDr@6254: 
KUDr@6254: 	_midi.options.rate = 44100;
KUDr@6254: 	_midi.options.format = MID_AUDIO_S16LSB;
KUDr@6254: 	_midi.options.channels = 2;
KUDr@6254: #if defined(PSP)
KUDr@6254: 	_midi.options.buffer_size = PSP_NUM_AUDIO_SAMPLES;
KUDr@6254: #else
KUDr@6254: 	_midi.options.buffer_size = _midi.options.rate;
KUDr@6254: #endif
KUDr@6254: 
KUDr@6254: #if defined(PSP)
KUDr@6254: 	pspAudioInit();
KUDr@6254: 	pspAudioSetChannelCallback(_midi.options.channels, &AudioOutCallback, NULL);
KUDr@6254: 	pspAudioSetVolume(_midi.options.channels, PSP_VOLUME_MAX, PSP_VOLUME_MAX);
KUDr@6254: #endif /* PSP */
KUDr@6254: 
KUDr@6254: 	return NULL;
KUDr@6254: }
KUDr@6254: 
bjarni@6298: static void LibtimidityMidiStop()
KUDr@6254: {
KUDr@6254: 	if (_midi.status == MIDI_PLAYING) {
KUDr@6254: 		_midi.status = MIDI_STOPPED;
KUDr@6254: 		mid_song_free(_midi.song);
KUDr@6254: 	}
KUDr@6254: 	mid_exit();
KUDr@6254: }
KUDr@6254: 
KUDr@6254: static void LibtimidityMidiPlaySong(const char *filename)
KUDr@6254: {
KUDr@6254: 	_midi.stream = mid_istream_open_file(filename);
KUDr@6254: 	if (_midi.stream == NULL) {
KUDr@6254: 		DEBUG(driver, 0, "Could not open music file");
KUDr@6254: 		return;
KUDr@6254: 	}
KUDr@6254: 
KUDr@6254: 	_midi.song = mid_song_load(_midi.stream, &_midi.options);
KUDr@6254: 	mid_istream_close(_midi.stream);
KUDr@6254: 	_midi.song_length = mid_song_get_total_time(_midi.song);
KUDr@6254: 
KUDr@6254: 	if (_midi.song == NULL) {
KUDr@6254: 		DEBUG(driver, 1, "Invalid MIDI file");
KUDr@6254: 		return;
KUDr@6254: 	}
KUDr@6254: 
KUDr@6254: 	mid_song_start(_midi.song);
KUDr@6254: 	_midi.status = MIDI_PLAYING;
KUDr@6254: }
KUDr@6254: 
bjarni@6298: static void LibtimidityMidiStopSong()
KUDr@6254: {
KUDr@6254: 	_midi.status = MIDI_STOPPED;
KUDr@6254: 	mid_song_free(_midi.song);
KUDr@6254: }
KUDr@6254: 
bjarni@6298: static bool LibtimidityMidiIsPlaying()
KUDr@6254: {
KUDr@6254: 	if (_midi.status == MIDI_PLAYING) {
KUDr@6254: 		_midi.song_position = mid_song_get_time(_midi.song);
KUDr@6254: 		if (_midi.song_position >= _midi.song_length) {
KUDr@6254: 			_midi.status = MIDI_STOPPED;
KUDr@6254: 			_midi.song_position = 0;
KUDr@6254: 		}
KUDr@6254: 	}
KUDr@6254: 
KUDr@6254: 	return (_midi.status == MIDI_PLAYING);
KUDr@6254: }
KUDr@6254: 
KUDr@6254: static void LibtimidityMidiSetVolume(byte vol)
KUDr@6254: {
KUDr@6254: 	if (_midi.song != NULL)
KUDr@6254: 		mid_song_set_volume(_midi.song, vol);
KUDr@6254: }
KUDr@6254: 
KUDr@6254: const HalMusicDriver _libtimidity_music_driver = {
KUDr@6254: 	LibtimidityMidiStart,
KUDr@6254: 	LibtimidityMidiStop,
KUDr@6254: 	LibtimidityMidiPlaySong,
KUDr@6254: 	LibtimidityMidiStopSong,
KUDr@6254: 	LibtimidityMidiIsPlaying,
KUDr@6254: 	LibtimidityMidiSetVolume,
KUDr@6254: };
KUDr@6254: