标签：des style blog http color io os 使用 ar
网上SlimDX的资源很少，搜到了http://www.xukailun.me/article/238/这篇关于《SlimDX的DirectSound模块应用实战》的文章，备份下来以备不时之需。
1.基本的播放功能
void CreateDirectSound(Guid deviceId, IntPtr handle) { // 音频设备的Id _ds = new DirectSound(deviceId); // 需要使用窗口的句柄 _ds.SetCooperativeLevel(handle, CooperativeLevel.Normal); } void Play(string file) { SecondarySoundBuffer snd = null; // 读取wav音频文件 using (WaveStream ws = new WaveStream(file)) { var desc = new SoundBufferDescription(); desc.Format = ws.Format; desc.Flags = BufferFlags.GlobalFocus | BufferFlags.ControlVolume | BufferFlags.ControlPositionNotify | BufferFlags.GetCurrentPosition2; desc.SizeInBytes = (int)ws.Length; // 为声音建立二级缓冲区 snd = new SecondarySoundBuffer(_ds, desc); snd.Volume = -200; byte[] buffer = new byte[desc.SizeInBytes]; ws.Read(buffer, 0, buffer.Length); snd.Write<byte>(buffer, 0, LockFlags.None); } snd.Play(0, PlayFlags.None); }
2.播放中的回调
AutoResetEvent功能就类似于Java的wait/notify。调用WaitOne方法相当于wait，使当前线程等待；调用Set方法相当于调用notify，通知线程继续执行。
class SoundUnit { public int Id { get; private set; } public SoundBuffer Buffer { get; private set; } public AutoResetEvent Event { get; private set; } public SoundUnit(SoundBuffer buffer) { this.Id = ++i; this.Buffer = buffer; this.Event = new AutoResetEvent(false); } } void Play(string file) { SecondarySoundBuffer snd = null; SoundUnit su = null; // 读取wav音频文件 using (WaveStream ws = new WaveStream(file)) { var desc = new SoundBufferDescription(); desc.Format = ws.Format; desc.Flags = BufferFlags.GlobalFocus | BufferFlags.ControlVolume | BufferFlags.ControlPositionNotify | BufferFlags.GetCurrentPosition2; desc.SizeInBytes = (int)ws.Length; // 为声音建立二级缓冲区 snd = new SecondarySoundBuffer(_ds, desc); snd.Volume = -200; byte[] buffer = new byte[desc.SizeInBytes]; ws.Read(buffer, 0, buffer.Length); snd.Write&lt;byte&gt;(buffer, 0, LockFlags.None); su = new SoundUnit(snd); snd.SetNotificationPositions(new[]{ // 设置播放结束后回调 new NotificationPosition{ Event = su.Event, Offset = DSBPN_OFFSETSTOP } }); } snd.Play(0, PlayFlags.None); Console.WriteLine("播放开始：" + su.Id); WaitForNotification(su); } void WaitForNotification(SoundUnit unit) { new Thread(() =>{ // 等待播放完成 unit.Event.WaitOne(); Console.WriteLine("播放结束：" + unit.Id); }).Start(); }
标签：des style blog http color io os 使用 ar
原文地址：http://www.cnblogs.com/smartsensor/p/3998421.html
