void Update()
{
var filter = AbstractMusicFilter.Instance;
var requestedTrack = filter == null ? null : filter.CurrentMusicTrack;
currentTrack = requestedTrack ?? NullTrackConfiguration;
var isCurrentTrackRepresented = audioSources.Any((source) => source.clip == currentTrack.clip);
var isCurrentAlone = isCurrentTrackRepresented && audioSources.Count == 1;
var isAnythingPlaying = audioSources.Any((source) => source.isPlaying);
if (!isCurrentTrackRepresented && currentTrack.clip != null)
{
var source = gameObject.AddComponent <AudioSource>();
source.clip = currentTrack.clip;
source.loop = true;
if (!isAnythingPlaying)
{
source.volume = 1f;
source.playOnAwake = true;
}
else
{
switch (currentTrack.transitionType)
{
case ETransition.FadePriorAndStart:
source.volume = 0f;
break;
case ETransition.Fade:
source.volume = 0f;
source.Play();
break;
case ETransition.HaltPriorAndStart:
source.volume = 1f;
source.Play();
break;
}
}
audioSources.Add(source);
}
var haltAllPrior = currentTrack.transitionType == ETransition.HaltPriorAndStart;
foreach (var source in audioSources)
{
var isCurrent = source.clip == currentTrack.clip;
if (isCurrent && !source.isPlaying && isCurrentAlone)
{
source.Play();
}
if (isCurrent && source.volume < 1f)
{
source.volume = Mathf.Min(1f, source.volume + Time.deltaTime / fadeTime);
}
else if (!isCurrent && source.volume > 0f)
{
source.volume = Mathf.Max(0f, source.volume - Time.deltaTime / fadeTime);
}
var dropNow = !isCurrent && (haltAllPrior || source.volume == 0f);
if (dropNow)
{
audioSourceRecycleBin.Add(source);
}
}
foreach (var source in audioSourceRecycleBin)
{
audioSources.Remove(source);
source.Stop();
GameObject.DestroyImmediate(source);
}
audioSourceRecycleBin.Clear();
}
void Start()
{
NullTrackConfiguration = ScriptableObject.CreateInstance <MusicTrackConfiguration>();
NullTrackConfiguration.clip = null;
NullTrackConfiguration.transitionType = ETransition.FadePriorAndStart;
}