[PATCH v8 6/7] quartz: Allow concurrent calls to AVI decoder qc_Notify and Receive.

[Alfred Agrell]

From: Alfred Agrell

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56698
---
 dlls/quartz/avidec.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/dlls/quartz/avidec.c b/dlls/quartz/avidec.c
index f494efdf1e8..89b3e998b73 100644
--- a/dlls/quartz/avidec.c
+++ b/dlls/quartz/avidec.c
@@ -482,12 +482,15 @@ static HRESULT WINAPI avi_decompressor_source_qc_Notify(IQualityControl *iface,
     TRACE("filter %p, sender %p, type %#x, proportion %ld, late %s, timestamp %s.\n",
             filter, sender, q.Type, q.Proportion, debugstr_time(q.Late), debugstr_time(q.TimeStamp));

-    EnterCriticalSection(&filter->filter.stream_cs);
-    if (q.Late > 0)
-        filter->late = q.Late + q.TimeStamp;
-    else
-        filter->late = -1;
-    LeaveCriticalSection(&filter->filter.stream_cs);
+    /* Submarine Titans calls qc_Notify from a foreign thread while inside sink_Receive */
+    if (TryEnterCriticalSection(&filter->filter.stream_cs))
+    {
+        if (q.Late > 0)
+            filter->late = q.Late + q.TimeStamp;
+        else
+            filter->late = -1;
+        LeaveCriticalSection(&filter->filter.stream_cs);
+    }
     return S_OK;
 }