녹음 기능을 제공하기 위해 System.Windows.Media.AudioSink
에서 파생 된 클래스를 만들었습니다. 나는 다음을 수행 내 콘크리트 싱크의 상태를 확인하려면 : 나는 this._myAudioSink.Stop()
을 수행 할 때CaptureSource.State를 확인할 때 InvalidOperationException이 발생합니다.
{System.InvalidOperationException: Capture source is not stopped
at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
at MS.Internal.XcpImports.SetValue(IManagedPeerBase obj, DependencyProperty property, DependencyObject doh)
at System.Windows.DependencyObject.SetValue(DependencyProperty property, DependencyObject doh)
at System.Windows.Media.CaptureSource..ctor()
at MS.Internal.CoreTypes.GetCoreWrapper(UInt32 typeId)
at MS.Internal.ManagedPeerTable.EnsureManagedPeer(IntPtr unmanagedPointer, Int32 typeIndex, Type type, Boolean preserveManagedObjectReference)
at MS.Internal.XcpImports.ConvertDO(IntPtr doPointer, Int32 typeIndex, Boolean releaseObjectReference)
at MS.Internal.XcpImports.ConvertType(CValue outVal, Int32 typeIndex, Boolean releaseObjectReference, Boolean deleteBuffer, IManagedPeerBase fromObject)
at MS.Internal.XcpImports.AudioSink_GetSource(AudioSink Sink)
at System.Windows.Media.AudioSink.get_CaptureSource()
at MyViewModel.get_IsRecording()
때때로, 내가 얻을 : 때때로
public class MyViewModel
{
private readonly MyAudioSink _myAudioSink; // this field is ensured in the ctor
public bool IsRecording
{
get
{
if (this._myAudioSink == null)
{
return false; // I know that `false` is wrong ...
}
return this._myAudioSink.CaptureSource.State == CaptureState.Started;
}
}
}
나는이 커서 IsRecording
에 대해 쿼리 할 때, 나는 다음과 같은 예외를 얻을 다음과 같은 (유사한) 예외 :
{System.InvalidOperationException: Capture source is not stopped
at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
at MS.Internal.XcpImports.SetValue(IManagedPeerBase obj, DependencyProperty property, DependencyObject doh)
at System.Windows.DependencyObject.SetValue(DependencyProperty property, DependencyObject doh)
at System.Windows.Media.CaptureSource..ctor()
at MS.Internal.CoreTypes.GetCoreWrapper(UInt32 typeId)
at MS.Internal.ManagedPeerTable.EnsureManagedPeer(IntPtr unmanagedPointer, Int32 typeIndex, Type type, Boolean preserveManagedObjectReference)
at MS.Internal.XcpImports.ConvertDO(IntPtr doPointer, Int32 typeIndex, Boolean releaseObjectReference)
at MS.Internal.XcpImports.ConvertType(CValue outVal, Int32 typeIndex, Boolean releaseObjectReference, Boolean deleteBuffer, IManagedPeerBase fromObject)
at MS.Internal.XcpImports.AudioSink_GetSource(AudioSink Sink)
at System.Windows.Media.AudioSink.get_CaptureSource()
그래서 ... 그 이유는 무엇입니까? 이 예외를 방지하려면 어떻게해야합니까? (내 필드를 도입하고이를 OnCaptureStarted
및 OnCaptureStopped
의 무시로 설정하는 것을 제외하고)? 내가 인터넷에서 발견 한이 문제의 유일한 주제는 here입니다
...