/// <summary>
/// 开始淡入播放下一首音乐。
/// - 如果正在淡出，则等淡出完成后再开始新的淡入。
/// - 如果正在淡入，则正在进行的淡入过程会被中断。
/// - 如果 fadeInDuration 为 null，则使用音乐自带的淡入时间参数。
/// - 目前没有处理上一首音乐正在正常播放的情况。
/// </summary>
public static void Play(MusicParameters musicParams, float?fadeInDuration = null, bool loop = false)
{
if (Singleton == null)
{
return;
}
if (Singleton.isFadeOut)
{
Singleton.nextMusicParams = musicParams;
Singleton.nextMusicIsLoop = loop;
Singleton.isWaitForPlaying = true;
Singleton.fadeInDuration = fadeInDuration;
}
else
{
if (Singleton.currentMusicParams != null && Singleton.currentMusicParams.Clip == musicParams.Clip)
{
return;
}
Singleton.currentMusicParams = musicParams;
Singleton.audioSource.clip = musicParams.Clip;
Singleton.audioSource.loop = loop;
Singleton.audioSource.time = 0;
Singleton.audioSource.Play();
Singleton.Volume = 0;
Singleton.isFadeIn = true;
Singleton.isWaitForPlaying = false;
Singleton.nextMusicParams = null;
Singleton.fadeInDuration = fadeInDuration;
}
}
private void Update()
{
if (isMute && muteFactor > Mathf.Epsilon)
{
float muteDuration = this.muteDuration.HasValue
? this.muteDuration.Value
: currentMusicParams.FadeOutDuration;
float fadeSpeed = 1 / muteDuration;
muteFactor -= fadeSpeed * Time.deltaTime;
if (muteFactor < 0)
{
muteFactor = 0;
}
UpdateVolume();
}
else if (!isMute && muteFactor < 1)
{
float muteDuration = this.muteDuration.HasValue
? this.muteDuration.Value
: currentMusicParams.FadeInDuration;
float fadeSpeed = 1 / muteDuration;
muteFactor += fadeSpeed * Time.deltaTime;
if (muteFactor > 1)
{
muteFactor = 1;
}
UpdateVolume();
}
if (isFadeIn)
{
float fadeInDuration = Singleton.fadeInDuration.HasValue
? Singleton.fadeInDuration.Value
: currentMusicParams.FadeInDuration;
float fadeSpeed = currentMusicParams.Volume / fadeInDuration;
Volume += fadeSpeed * Time.deltaTime;
if (Volume >= currentMusicParams.Volume)
{
Volume = currentMusicParams.Volume;
isFadeIn = false;
Singleton.fadeInDuration = null;
}
}
else if (isFadeOut)
{
float fadeOutDuration = Singleton.fadeOutDuration.HasValue
? Singleton.fadeOutDuration.Value
: currentMusicParams.FadeOutDuration;
float fadeSpeed = currentMusicParams.Volume / fadeOutDuration;
Volume -= fadeSpeed * Time.deltaTime;
if (Volume <= 0)
{
Volume = 0;
isFadeOut = false;
audioSource.Stop();
currentMusicParams = null;
Singleton.fadeOutDuration = null;
if (isWaitForPlaying && nextMusicParams != null)
{
Play(nextMusicParams, Singleton.fadeInDuration, nextMusicIsLoop);
}
}
}
if (!isPlaying && IsPlaying && PlayStarted != null)
{
PlayStarted();
}
else if (isPlaying && !IsPlaying && PlayEnded != null)
{
currentMusicParams = null;
PlayEnded();
}
isPlaying = IsPlaying;
}
/// <summary>
/// 淡入循环播放下一首音乐。
/// 如果 fadeInDuration 为 null，则使用音乐自带的淡入时间参数。
/// </summary>
public static void Loop(MusicParameters musicParams, float?fadeInDuration = null)
{
Play(musicParams, fadeInDuration, true);
}