strmbase: Forbid disconnecting the sink if the filter is not stopped.

Addendum to 2a6037e2. Signed-off-by: Zebediah Figura <z.figura12@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

strmbase: Forbid disconnecting the sink if the filter is not stopped.
9c2cf131 · Zebediah Figura · Alexandre Julliard · 7cae17c1 · 9c2cf131
Commit 9c2cf131 authored Nov 19, 2020 by Zebediah Figura Committed by Alexandre Julliard Nov 19, 2020
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pin.c dlls/strmbase/pin.c +7 -0

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--- 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)