/**
* Starts playing a new song.
*
* @param filename Path to a MIDI file.
*/
void MusicDriver_Cocoa::PlaySong(const char *filename)
{
DEBUG(driver, 2, "cocoa_m: trying to play '%s'", filename);
this->StopSong();
if (_sequence != NULL) {
DisposeMusicSequence(_sequence);
_sequence = NULL;
}
if (NewMusicSequence(&_sequence) != noErr) {
DEBUG(driver, 0, "cocoa_m: Failed to create music sequence");
return;
}
const char *os_file = OTTD2FS(filename);
CFURLRef url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, (const UInt8*)os_file, strlen(os_file), false);
#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
if (MacOSVersionIsAtLeast(10, 5, 0)) {
if (MusicSequenceFileLoad(_sequence, url, 0, 0) != noErr) {
DEBUG(driver, 0, "cocoa_m: Failed to load MIDI file");
CFRelease(url);
return;
}
} else
#endif
{
#if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5)
FSRef ref_file;
if (!CFURLGetFSRef(url, &ref_file)) {
DEBUG(driver, 0, "cocoa_m: Failed to make FSRef");
CFRelease(url);
return;
}
if (MusicSequenceLoadSMFWithFlags(_sequence, &ref_file, 0) != noErr) {
DEBUG(driver, 0, "cocoa_m: Failed to load MIDI file old style");
CFRelease(url);
return;
}
#endif
}
CFRelease(url);
/* Construct audio graph */
AUGraph graph = NULL;
MusicSequenceGetAUGraph(_sequence, &graph);
AUGraphOpen(graph);
if (AUGraphInitialize(graph) != noErr) {
DEBUG(driver, 0, "cocoa_m: Failed to initialize AU graph");
return;
}
/* Figure out sequence length */
UInt32 num_tracks;
MusicSequenceGetTrackCount(_sequence, &num_tracks);
_seq_length = 0;
for (UInt32 i = 0; i < num_tracks; i++) {
MusicTrack track = NULL;
MusicTimeStamp track_length = 0;
UInt32 prop_size = sizeof(MusicTimeStamp);
MusicSequenceGetIndTrack(_sequence, i, &track);
MusicTrackGetProperty(track, kSequenceTrackProperty_TrackLength, &track_length, &prop_size);
if (track_length > _seq_length) _seq_length = track_length;
}
/* Add 8 beats for reverb/long note release */
_seq_length += 8;
DoSetVolume();
MusicPlayerSetSequence(_player, _sequence);
MusicPlayerPreroll(_player);
if (MusicPlayerStart(_player) != noErr) return;
_playing = true;
DEBUG(driver, 3, "cocoa_m: playing '%s'", filename);
}
/**
* Changes the playing volume of the MIDI player.
*
* @param vol The desired volume, range of the value is @c 0-127
*/
void MusicDriver_Cocoa::SetVolume(byte vol)
{
_volume = vol;
DoSetVolume();
}
void SetVolume( SpReal vol )
{
vol = vol < 0.0f ? 0.0f : ( vol > 1.0f ? 1.0f : vol );
DoSetVolume( vol );
}
