[PATCH v4 4/4] quartz: Hold the streaming lock while calling ICDecompressEnd.

[Anton Baskanov]

From: Anton Baskanov

Otherwise, the streaming thread might try to access the decompressor while it's being destroyed.
---
 dlls/quartz/avidec.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/dlls/quartz/avidec.c b/dlls/quartz/avidec.c
index d7f97e0380c..f494efdf1e8 100644
--- a/dlls/quartz/avidec.c
+++ b/dlls/quartz/avidec.c
@@ -573,10 +573,16 @@ static HRESULT avi_decompressor_cleanup_stream(struct strmbase_filter *iface)
     if (!filter->source.pin.peer)
         return S_OK;

-    if (filter->hvid && (res = ICDecompressEnd(filter->hvid)))
+    if (filter->hvid)
     {
-        ERR("ICDecompressEnd() failed, error %Id.\n", res);
-        return E_FAIL;
+        EnterCriticalSection(&filter->filter.stream_cs);
+        res = ICDecompressEnd(filter->hvid);
+        LeaveCriticalSection(&filter->filter.stream_cs);
+        if (res)
+        {
+            ERR("ICDecompressEnd() failed, error %Id.\n", res);
+            return E_FAIL;
+        }
     }

IMemAllocator_Decommit(filter->source.pAllocator);