NLDClient-yudde/ProjectNLD/Assets/Code/Scripts/Framework/Audio/AudioBase.cs

using UnityEngine;

//音频播放对象的基类，需要兼容AudioClip和Criware
public abstract class AudioBase
{
    public enum PlayState
    {
        Playing,
        Stopped,
        Paused,
        Loading,
    }
    
    
    protected static int audioCounter = 0;
    protected float volume;
    protected float targetVolume;
    protected float initTargetVolume;
    protected float tempFadeSeconds;
    protected float fadeInterpolater;
    protected float onFadeStartVolume;
    protected AudioType audioType;
    protected Transform sourceTransform;
    protected PlayState playState;
    
    public int audioID { get; protected set; }
    
    public bool loop { get; set; }


    public bool persist { get; set; }


    public float fadeInSeconds { get; set; }


    public float fadeOutSeconds { get; set; }
    
    public bool IsPlaying
    {
        get => playState == PlayState.Playing;
    }
    
    public bool IsPaused
    {
        get => playState == PlayState.Paused;
    }

    public bool IsStopped
    {
        get => playState == PlayState.Stopped;
    }

    public bool IsLoading
    {
        get => playState == PlayState.Loading;
    }
    
    public bool activated { get; protected set; }
    
    public enum AudioType
    {
        Music,
        Sound,
    }

    //创建一个Source组件用以播放音频
    public virtual void CreateSource() 
    {}
    
    //设置音高
    public virtual void SetPitch() 
    {}

    //播放
    public void Play()
    {
        Play(initTargetVolume);
    }

    public virtual void Play(string CueName, bool loop = false)
    {
        
    }

    public abstract void Play(float volume);

    //终止
    public void Stop()
    {
        fadeInterpolater = 0f;
        onFadeStartVolume = volume;
        targetVolume = 0f;

        playState = PlayState.Stopped;
    }

    //暂停
    public abstract void Pause();

    //继续播放
    public abstract void Resume();

    //设置音量
    public void SetVolume(float volume, float fadeSeconds = -1.0f)
    {
        if (fadeSeconds > 0.0f)
        {
            SetVolume(volume, fadeSeconds, this.volume);
        }
        else if (volume > targetVolume)
        {
            SetVolume(volume, fadeOutSeconds, this.volume);
        }
        else
        {
            SetVolume(volume, fadeInSeconds, this.volume);
        }
    }
    
    /// <summary>
    /// Sets the audio volume
    /// </summary>
    /// <param name="volume">The target volume</param>
    /// <param name="fadeSeconds">How many seconds it needs for the audio to fade in/out to reach target volume. If passed, it will override the Audio's fade in/out seconds, but only for this transition</param>
    /// <param name="startVolume">Immediately set the volume to this value before beginning the fade. If not passed, the Audio will start fading from the current volume towards the target volume</param>
    public void SetVolume(float volume, float fadeSeconds, float startVolume)
    {
        targetVolume = Mathf.Clamp01(volume);
        fadeInterpolater = 0;
        onFadeStartVolume = startVolume;
        tempFadeSeconds = fadeSeconds;
    }

    //刷新函数，需要子类去实现
    public abstract void Update();
}