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00012 #include "../stdafx.h"
00013 #include "../openttd.h"
00014 #include "../sound_type.h"
00015 #include "../debug.h"
00016 #include "libtimidity.h"
00017 #include <fcntl.h>
00018 #include <sys/types.h>
00019 #include <sys/wait.h>
00020 #include <unistd.h>
00021 #include <signal.h>
00022 #include <sys/stat.h>
00023 #include <errno.h>
00024 #include <timidity.h>
00025 #if defined(PSP)
00026 #include <pspaudiolib.h>
00027 #endif
00028
00029 enum MidiState {
00030 MIDI_STOPPED = 0,
00031 MIDI_PLAYING = 1,
00032 };
00033
00034 static struct {
00035 MidIStream *stream;
00036 MidSongOptions options;
00037 MidSong *song;
00038
00039 MidiState status;
00040 uint32 song_length;
00041 uint32 song_position;
00042 } _midi;
00043
00044 #if defined(PSP)
00045 static void AudioOutCallback(void *buf, unsigned int _reqn, void *userdata)
00046 {
00047 memset(buf, 0, _reqn * PSP_NUM_AUDIO_CHANNELS);
00048 if (_midi.status == MIDI_PLAYING) {
00049 mid_song_read_wave(_midi.song, buf, _reqn * PSP_NUM_AUDIO_CHANNELS);
00050 }
00051 }
00052 #endif
00053
00054 static FMusicDriver_LibTimidity iFMusicDriver_LibTimidity;
00055
00056 const char *MusicDriver_LibTimidity::Start(const char * const *param)
00057 {
00058 _midi.status = MIDI_STOPPED;
00059 _midi.song = NULL;
00060
00061 if (mid_init(param == NULL ? NULL : const_cast<char *>(param[0])) < 0) {
00062
00063
00064
00065 if (param != NULL || mid_init_no_config() < 0) {
00066 return "error initializing timidity";
00067 }
00068 }
00069 DEBUG(driver, 1, "successfully initialised timidity");
00070
00071 _midi.options.rate = 44100;
00072 _midi.options.format = MID_AUDIO_S16LSB;
00073 _midi.options.channels = 2;
00074 #if defined(PSP)
00075 _midi.options.buffer_size = PSP_NUM_AUDIO_SAMPLES;
00076 #else
00077 _midi.options.buffer_size = _midi.options.rate;
00078 #endif
00079
00080 #if defined(PSP)
00081 pspAudioInit();
00082 pspAudioSetChannelCallback(_midi.options.channels, &AudioOutCallback, NULL);
00083 pspAudioSetVolume(_midi.options.channels, PSP_VOLUME_MAX, PSP_VOLUME_MAX);
00084 #endif
00085
00086 return NULL;
00087 }
00088
00089 void MusicDriver_LibTimidity::Stop()
00090 {
00091 if (_midi.status == MIDI_PLAYING) this->StopSong();
00092 mid_exit();
00093 }
00094
00095 void MusicDriver_LibTimidity::PlaySong(const char *filename)
00096 {
00097 this->StopSong();
00098
00099 _midi.stream = mid_istream_open_file(filename);
00100 if (_midi.stream == NULL) {
00101 DEBUG(driver, 0, "Could not open music file");
00102 return;
00103 }
00104
00105 _midi.song = mid_song_load(_midi.stream, &_midi.options);
00106 mid_istream_close(_midi.stream);
00107 _midi.song_length = mid_song_get_total_time(_midi.song);
00108
00109 if (_midi.song == NULL) {
00110 DEBUG(driver, 1, "Invalid MIDI file");
00111 return;
00112 }
00113
00114 mid_song_start(_midi.song);
00115 _midi.status = MIDI_PLAYING;
00116 }
00117
00118 void MusicDriver_LibTimidity::StopSong()
00119 {
00120 _midi.status = MIDI_STOPPED;
00121
00122 if (_midi.song != NULL) mid_song_free(_midi.song);
00123 _midi.song = NULL;
00124 }
00125
00126 bool MusicDriver_LibTimidity::IsSongPlaying()
00127 {
00128 if (_midi.status == MIDI_PLAYING) {
00129 _midi.song_position = mid_song_get_time(_midi.song);
00130 if (_midi.song_position >= _midi.song_length) {
00131 _midi.status = MIDI_STOPPED;
00132 _midi.song_position = 0;
00133 }
00134 }
00135
00136 return (_midi.status == MIDI_PLAYING);
00137 }
00138
00139 void MusicDriver_LibTimidity::SetVolume(byte vol)
00140 {
00141 if (_midi.song != NULL) mid_song_set_volume(_midi.song, vol);
00142 }