C#中如何使用DirectX.DirectSound播放語音

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DirectX.DirectSound的特點

1、可同時播放多條語音

2、可分左右聲道進行播放

3、可隨時釋放正在播放的語音

此組件處理流程：

1、創建播放線程

public void StartDirectXSoundThread(Control _con)
        {
            IsStart = true;
            if (control == null) control = _con;
            Task task = new Task(() =>
            {
                while (true)
                {
                    try
                    {
                        if (!IsStart) break;
                        if (!IsPlaying())
                        {
                            if (soundlist.Count > 0)
                            {
                                if (!IsPlayVoice)
                                {
                                    IsPlayVoice = true;
                                    control.Invoke((MethodInvoker)delegate
                                    {
                                        SoundPlay(soundlist[0]);
                                        soundlist.RemoveAt(0);
                                    });
                                }
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        LogHelper.Debug(ex);
                    }
                    finally
                    {
                    }
                    Thread.Sleep(100);
                }
            });
            task.Start();
        }

2、釋放播放線程

public void StopDirectXSoundThread()
{
  IsStart = false;
 }

3、判斷是否播放中，通過PlayPosition!=0和播放緩沖是否null的條件判斷是否播放

private bool IsPlaying()
        {
            bool Ret = false;
            try
            {
                if (IsCreate)
                {
                    if (secBuffer != null)
                    {
                        if (secBuffer.PlayPosition != 0)
                        {
                            Ret = true;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                LogHelper.Debug(ex);
            }
            return Ret;
        }

4、播放音頻

public void SoundPlay(string _wavpath)
        {
            try
            {
                if (_wavpath.IndexOf("\\") < 0)
                {
                    _wavpath = SoundPath + _wavpath;
                }
                if (_wavpath.IndexOf(".wav") < 0)
                {
                    _wavpath += ".wav";
                }
                if (!File.Exists(_wavpath))
                {
                    LogHelper.Info("無" + _wavpath + "文件！");
                }
                else
                {
                    secDev.SetCooperativeLevel(control, CooperativeLevel.Normal);
                    BufferDescription buffdes = new BufferDescription()
                    {
                        GlobalFocus = true
                    };
                    secBuffer = new SecondaryBuffer(_wavpath, buffdes, secDev);
                    secBuffer.Play(0, BufferPlayFlags.Default);//設置緩沖區為默認播放 
                }
                IsCreate = true;
                IsPlayVoice = false;
            }
            catch (Exception ex)
            {
                LogHelper.Debug(ex);
     }
}

左右聲道通過secBuffer.Pan屬性進行控制，值含義見下圖：

a、Center中心通道，左右通道同時播放，默認值0

b、Right右通道，值10000

c、Right左通道，值-10000

5、清除播放中音頻 ，播放中的音頻可以通過Dispose()方法進行釋放

public void ClearPlay()
  {
  if (secBuffer != null)
   {
    soundlist.Clear();
    secBuffer.Dispose();
    IsCreate = false;
     }
}

6、定義

/// <summary>
/// 播放設備
/// </summary>
private Device secDev = new Device();
 
/// <summary>
/// 播放緩沖區
/// </summary>
private SecondaryBuffer secBuffer = null;
 
/// <summary>
/// 可視化組件
/// </summary>
private Control control;
 
/// <summary>
/// 是否被創建
/// </summary>
private bool IsCreate = false;

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