public void Prev()
{
if (MusicsListCollection.Count == 0)
{
return;
}
var currentIndex = MusicsListCollection.IndexOf(CurrentMusic);
switch (CurrentCycleType)
{
case PlayCycleType.RepeatAll:
if (currentIndex == 0)
{
CurrentMusic = MusicsListCollection[MusicsListCollection.Count - 1];
}
else
{
CurrentMusic = MusicsListCollection[currentIndex - 1];
}
break;
case PlayCycleType.RepeatOne:
CurrentMusic = CurrentMusic;
break;
case PlayCycleType.Order:
if (currentIndex > 0)
{
CurrentMusic = MusicsListCollection[currentIndex - 1];
}
else
{
CurrentMusic = null;
}
break;
case PlayCycleType.Random:
if (this._randomIndex == null || this._randomIndex.Length != MusicsListCollection.Count || this._randomIndex.All(x => x == 0))
{
this._randomIndex = RandomSequence(MusicsListCollection.Count);
}
var randomIndex = this._randomIndex.IndexOf(currentIndex);
if (randomIndex == 0)
{
randomIndex = this._randomIndex.Length - 1;
}
else
{
randomIndex--;
}
CurrentMusic = MusicsListCollection[this._randomIndex[randomIndex]];
break;
default:
throw new ArgumentOutOfRangeException();
}
if (CurrentMusic != null)
{
Play(CurrentMusic).Wait(1000);
}
else
{
Stop();
}
}
/// <summary>
/// 播放指定的音乐
/// </summary>
/// <param name="music">如果传入null，则自动播放当前列表的第一个</param>
public async Task Play(Music music = null)
{
if (music == null && MusicsListCollection.Count == 0)
{
throw new ArgumentException();
}
if (this._audioPlayableServices.PlayState == PlayState.Paused)
{
this._audioPlayableServices.Resume();
return;
}
Stop();
if (MusicsListCollection.Count == 0)
{
MusicsListCollection.Add(music);
CurrentMusic = music;
}
if (music == null)
{
CurrentMusic = MusicsListCollection[0];
}
else
{
var tmp = MusicsListCollection.FirstOrDefault(x => x.Id == music.Id);
if (tmp == null)
{
MusicsListCollection.Add(music);
CurrentMusic = music;
}
else
{
CurrentMusic = tmp;
}
}
var netWorkDataResult = await this._netWorkServices.GetAsync <Music>("Common", "GetMusicById", new { CurrentMusic.Id });
if (!netWorkDataResult.Successed)
{
this._logger.Log($"请求音乐地址失败，对应的id：{CurrentMusic.Id},名称{CurrentMusic.Name}", Category.Exception, Priority.High);
return;
}
CurrentMusic.Url = netWorkDataResult.Data.Url;
if (!string.IsNullOrEmpty(netWorkDataResult.Data.Url))
{
this._audioPlayableServices.Play(netWorkDataResult.Data.Url);
PlayStateChanged?.Invoke(this, this._audioPlayableServices.PlayState);
}
else if (PayMusicProgress(CurrentMusic))
{
netWorkDataResult = await this._netWorkServices.GetAsync <Music>("Common", "GetMusicById", new { CurrentMusic.Id });
if (!netWorkDataResult.Successed)
{
this._logger.Log($"请求音乐地址失败，对应的id：{CurrentMusic.Id},名称{CurrentMusic.Name}", Category.Exception, Priority.High);
return;
}
CurrentMusic.Url = netWorkDataResult.Data.Url;
if (!string.IsNullOrEmpty(netWorkDataResult.Data.Url))
{
this._audioPlayableServices.Play(netWorkDataResult.Data.Url);
PlayStateChanged?.Invoke(this, this._audioPlayableServices.PlayState);
}
}
}
