Nikolay Sivov : mfplat: Make sure async event delivery is triggered with EndGetEvent().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 67bd377af2389ecc1473f01c702a3fd264b8cf0f
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=67bd377af2389ecc1473f01c7...

Author: Nikolay Sivov 
Date:   Fri Jun  7 16:09:01 2019 +0300

mfplat: Make sure async event delivery is triggered with EndGetEvent().

Signed-off-by: Nikolay Sivov 
Signed-off-by: Alexandre Julliard

---

dlls/mfplat/main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dlls/mfplat/main.c b/dlls/mfplat/main.c
index 460f21e..224ba6e 100644
--- a/dlls/mfplat/main.c
+++ b/dlls/mfplat/main.c
@@ -5982,6 +5982,7 @@ struct event_queue
     CONDITION_VARIABLE update_event;
     struct list events;
     BOOL is_shut_down;
+    BOOL notified;
     IMFAsyncResult *subscriber;
 };

@@ -6105,9 +6106,10 @@ static HRESULT WINAPI eventqueue_GetEvent(IMFMediaEventQueue *iface, DWORD flags

static void queue_notify_subscriber(struct event_queue *queue)
 {
-    if (list_empty(&queue->events) || !queue->subscriber)
+    if (list_empty(&queue->events) || !queue->subscriber || queue->notified)
         return;

+    queue->notified = TRUE;
     MFPutWorkItemEx(MFASYNC_CALLBACK_QUEUE_STANDARD, queue->subscriber);
 }

@@ -6163,6 +6165,7 @@ static HRESULT WINAPI eventqueue_EndGetEvent(IMFMediaEventQueue *iface, IMFAsync
         if (queue->subscriber)
             IMFAsyncResult_Release(queue->subscriber);
         queue->subscriber = NULL;
+        queue->notified = FALSE;
         hr = *event ? S_OK : E_FAIL;
     }