[PATCH v2 1/5] strmbase: Forbid disconnecting the sink if the filter is not stopped.

[Zebediah Figura]

Addendum to 2a6037e263ff3fae8ca82d90b0b141bea1cd473d.

Signed-off-by: Zebediah Figura 
---
 dlls/strmbase/pin.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/strmbase/pin.c b/dlls/strmbase/pin.c
index c08f04730e7..d7788cda493 100644
--- a/dlls/strmbase/pin.c
+++ b/dlls/strmbase/pin.c
@@ -887,6 +887,13 @@ static HRESULT WINAPI sink_Disconnect(IPin *iface)

EnterCriticalSection(&pin->pin.filter->csFilter);

+    if (pin->pin.filter->state != State_Stopped)
+    {
+        LeaveCriticalSection(&pin->pin.filter->csFilter);
+        WARN("Filter is not stopped; returning VFW_E_NOT_STOPPED.\n");
+        return VFW_E_NOT_STOPPED;
+    }
+
     if (pin->pin.peer)
     {
         if (pin->pFuncsTable->sink_disconnect)