public int Play()
{
if (!this.isInit)
{
return(LibErrors.NOT_INITIALIZED);
}
if (this.stream == null)
{
return(LibErrors.STREAM_NOT_OPENED);
}
this.dsb8.SetCurrentPosition(0);
uint dsErr = this.dsb8.Play(0, 0, DSBPLAY.DSBPLAY_LOOPING);
if (dsErr != DSERR.DS_OK)
{
LibUtils.PrintLog("Play失败, DSERR = {0}", dsErr);
return(LibErrors.DS_ERROR);
}
this.isPlaying = true;
this.NotifyStatusChanged(DSLibPlayerStatus.Playing, 0);
uint offset = (uint)LibConsts.BUFF_NOTIFY_SIZE;
Task.Factory.StartNew((state) =>
{
while (this.isPlaying)
{
IntPtr lpHandles = Marshal.UnsafeAddrOfPinnedArrayElement(this.notifyHwnd_close, 0);
uint notifyIdx = LibNatives.WaitForMultipleObjects(LibConsts.BUFF_NOTIFY_TIMES, lpHandles, false, LibNatives.INFINITE);
if ((notifyIdx >= LibNatives.WAIT_OBJECT_0) && (notifyIdx <= LibNatives.WAIT_OBJECT_0 + LibConsts.BUFF_NOTIFY_TIMES))
{
if (!this.isPlaying)
{
// 通知是异步的,在调用了Stop之后, 如果收到通知的速度比音频流Seek(0)的速度慢（也就是说先重置了音频流，然后又收到了一次通知）, 有可能会再次读取一次数据
break;
}
this.HandleNotification(offset, LibConsts.BUFF_NOTIFY_SIZE, state as SynchronizationContext);
offset += (uint)LibConsts.BUFF_NOTIFY_SIZE;
offset %= (uint)(LibConsts.BUFF_NOTIFY_SIZE * LibConsts.BUFF_NOTIFY_TIMES);
//Console.WriteLine("dwOffset = {0}, offset = {1}", this.rgdsbpn[notifyIdx].dwOffset, offset);
}
else if (notifyIdx == LibNatives.WAIT_FAILED)
{
int winErr = Marshal.GetLastWin32Error();
LibUtils.PrintLog("等待信号失败, LastWin32Error = {0}", winErr);
(state as SynchronizationContext).Send((o) =>
{
this.Stop();
}, null);
this.NotifyStatusChanged(DSLibPlayerStatus.Error, winErr);
}
}
LibUtils.PrintLog("跳出循环");
}, SynchronizationContext.Current);
return(LibErrors.SUCCESS);
}
public int Start()
{
uint dsErr = this.dscb8.Start(LibNatives.DSCBSTART_LOOPING);
if (dsErr != DSERR.DS_OK)
{
LibUtils.PrintLog("开始录音失败, DSERROR = {0}", dsErr);
return(LibErrors.DS_ERROR);
}
this.isRunning = true;
Task.Factory.StartNew((state) =>
{
while (this.isRunning)
{
// 这里需要实时获取通知对象的指针, 因为这个指针的值每隔一段时间会改变。。。
IntPtr lpHandles = Marshal.UnsafeAddrOfPinnedArrayElement(this.notifyHwnd_close, 0);
// DSLibNatives.WaitForSingleObject(this.close_notifyHwnd[0], DSLibNatives.INFINITE);
switch (LibNatives.WaitForMultipleObjects(LibConsts.NotifyEvents, lpHandles, false, LibNatives.INFINITE))
{
case LibNatives.WAIT_OBJECT_0:
{
(state as SynchronizationContext).Send((o) =>
{
try
{
byte[] audioData = null;
if (this.RecordCapturedData(0, (uint)this.wfx.nAvgBytesPerSec, out audioData) == DSERR.DS_OK)
{
if (this.OnCaptured != null)
{
this.OnCaptured(audioData);
}
}
}
catch (Exception ex)
{
LibUtils.PrintLog("保存音频流异常, Exception = {0}", ex);
}
}, null);
LibNatives.ResetEvent(this.notifyHwnd_close[0]);
}
break;
case LibNatives.WAIT_OBJECT_0 + 1:
{
// 录音结束
LibNatives.ResetEvent(this.notifyHwnd_close[1]);
this.isRunning = false;
}
break;
case LibNatives.WAIT_FAILED:
{
int error = Marshal.GetLastWin32Error();
// 失败, 句柄已经被销毁
LibUtils.PrintLog("WAIT_FAILED, LastWin32Error = {0}", error);
this.isRunning = false;
this.Stop();
if (this.OnError != null)
{
this.OnError(error);
}
}
break;
}
}
}, SynchronizationContext.Current);
return(LibErrors.SUCCESS);
}
