1 files changed, 49 insertions, 0 deletions
diff --git a/WhisperNet/CaptureCallbacks.cs b/WhisperNet/CaptureCallbacks.cs
new file mode 100644
index 0000000..26013f9
--- /dev/null
+++ b/WhisperNet/CaptureCallbacks.cs
@@ -0,0 +1,49 @@
+using Whisper.Internal;
+
+namespace Whisper
+{
+	/// <summary>Implement this abstract class to provide callbacks for audio capture method</summary>
+	public abstract class CaptureCallbacks
+	{
+		/// <summary>Override this method to support cancellation</summary>
+		protected virtual bool shouldCancel( Context sender ) { return false; }
+
+		/// <summary>Override this method to get notified about status changes</summary>
+		protected virtual void captureStatusChanged( Context sender, eCaptureStatus status ) { }
+
+		internal pfnShouldCancel cancel( Context sender )
+		{
+			const int S_OK = 0;
+			const int S_FALSE = 1;
+			return delegate ( IntPtr pv )
+			{
+				try
+				{
+					return shouldCancel( sender ) ? S_OK : S_FALSE;
+				}
+				catch( Exception ex )
+				{
+					NativeLogger.captureException( ex );
+					return ex.HResult;
+				}
+			};
+		}
+
+		internal pfnCaptureStatus status( Context sender )
+		{
+			return delegate ( IntPtr pv, eCaptureStatus status )
+			{
+				try
+				{
+					captureStatusChanged( sender, status );
+					return 0;
+				}
+				catch( Exception ex )
+				{
+					NativeLogger.captureException( ex );
+					return ex.HResult;
+				}
+			};
+		}
+	}
+}
+\ No newline at end of file