c# - 为什么在调试条件下无法播放DirectSound Buffer？

Question

我的wave无法在调试下播放。如果按CTRL + F5，则会得到一个不错的WAV，并且控制台会写出文件光标位置(buf.PlayPosition)，然后在声音结束时退出该方法。在调试下(当我刚按F5时)没有音频输出，但是在控制台窗口中文件光标的位置仍然增加，并且该方法无一异常(exception)地退出。

using Microsoft.DirectX.DirectSound;

public void Play()
    {
        var fileName = "bass.wav";
        using (var stream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
        {       
            using (var dev = new Device())
            {
                dev.SetCooperativeLevel(this, CooperativeLevel.Priority);
                using (Buffer buf = new Buffer(stream, dev))
                {
                    buf.Volume = 0;
                    buf.Play(0, BufferPlayFlags.Default);
                    while (buf.Status.Playing)
                    {
                        System.Console.WriteLine("playing " + buf.PlayPosition);
                    }
                }
            }
        }
    }

有任何想法吗？

Answer 1

也许您需要使用BufferDescription给缓冲区“Global Focus”。从C++文档中:

"The DSBCAPS_GLOBALFOCUS flag in the example ensures that the buffer will continue playing even when the application window is not in the foreground. Without this flag, the buffer will be muted when another application or even a dialog box has the input focus."

尝试使用构造函数的 public SecondaryBuffer(Stream, BufferDescription, Device); 形式。