Question

（道歉，如果这是重复...我发布但没有看到它确实进入论坛的证据）

我一直在努力让SlimDX DirectSound正常工作。这是我的代码。它从wav文件填充辅助缓冲区，然后在线程循环中交替填充缓冲区的下半部分或上半部分。

它首先加载缓冲区。 AutoResetEvents应该触发它们，然后填充缓冲区的下半部分和上半部分（使用Debug语句验证）。但是在第一次加载缓冲区后，播放不会继续。所以不知何故，缓冲区的重新填充不能正常工作。

想法？

（我正在使用DirectSound，因为这是我发现设置我想要使用的音频设备的guid的唯一方法。对其他.NET友好的方法开放。）

private void PlaySound(Guid soundCardGuid, string audioFile) {
        DirectSound ds = new DirectSound(soundCardGuid);

        ds.SetCooperativeLevel(this.Handle, CooperativeLevel.Priority);

        WaveFormat format = new WaveFormat();
        format.BitsPerSample = 16;
        format.BlockAlignment = 4;
        format.Channels = 2;
        format.FormatTag = WaveFormatTag.Pcm;
        format.SamplesPerSecond = 44100;
        format.AverageBytesPerSecond = format.SamplesPerSecond * format.BlockAlignment;

        SoundBufferDescription desc = new SoundBufferDescription();
        desc.Format = format;
        desc.Flags = BufferFlags.GlobalFocus;
        desc.SizeInBytes = 8 * format.AverageBytesPerSecond; 

        PrimarySoundBuffer pBuffer = new PrimarySoundBuffer(ds, desc);

        SoundBufferDescription desc2 = new SoundBufferDescription();
        desc2.Format = format;
        desc2.Flags = BufferFlags.GlobalFocus | BufferFlags.ControlPositionNotify | BufferFlags.GetCurrentPosition2;
        desc2.SizeInBytes = 8 * format.AverageBytesPerSecond;

        SecondarySoundBuffer sBuffer1 = new SecondarySoundBuffer(ds, desc2);

        NotificationPosition[] notifications = new NotificationPosition[2];
        notifications[0].Offset = desc2.SizeInBytes / 2 + 1;
        notifications[1].Offset = desc2.SizeInBytes - 1; ;

        notifications[0].Event = new AutoResetEvent(false);
        notifications[1].Event = new AutoResetEvent(false);
        sBuffer1.SetNotificationPositions(notifications);

        byte[] bytes1 = new byte[desc2.SizeInBytes / 2];
        byte[] bytes2 = new byte[desc2.SizeInBytes];

        Stream stream = File.Open(audioFile, FileMode.Open);

        Thread fillBuffer = new Thread(() => {
            int readNumber = 1;
            int bytesRead;

            bytesRead = stream.Read(bytes2, 0, desc2.SizeInBytes);
            sBuffer1.Write<byte>(bytes2, 0, LockFlags.None);
            sBuffer1.Play(0, PlayFlags.None); 
            while (true) {
                if (bytesRead == 0) { break; }
                notifications[0].Event.WaitOne();
                bytesRead = stream.Read(bytes1, 0, bytes1.Length);
                sBuffer1.Write<byte>(bytes1, 0, LockFlags.None);

                if (bytesRead == 0) { break; }
                notifications[1].Event.WaitOne();
                bytesRead = stream.Read(bytes1, 0, bytes1.Length);
                sBuffer1.Write<byte>(bytes1, desc2.SizeInBytes / 2, LockFlags.None); 
            }
            stream.Close();
            stream.Dispose();
        });
        fillBuffer.Start();
    }
}

Answer 1

您尚未将其设置为在播放缓冲区上循环。将您的代码更改为：

sBuffer1.Play(0, PlayFlags.Looping);

用SlimDX和DirectSound播放声音（C＃）

1 个答案: