Ziqing Hui : winegstreamer: Implement GetStreamSinkCount for media sink.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 6de1cbfe3c24db824a73371fa1263738d611a030
URL:    https://gitlab.winehq.org/wine/wine/-/commit/6de1cbfe3c24db824a73371fa126373...

Author: Ziqing Hui <zhui(a)codeweavers.com>
Date:   Fri Aug 11 11:23:11 2023 +0800

winegstreamer: Implement GetStreamSinkCount for media sink.

---

 dlls/winegstreamer/media_sink.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/dlls/winegstreamer/media_sink.c b/dlls/winegstreamer/media_sink.c
index 9083dea6709..54a1c839758 100644
--- a/dlls/winegstreamer/media_sink.c
+++ b/dlls/winegstreamer/media_sink.c
@@ -624,9 +624,18 @@ static HRESULT WINAPI media_sink_RemoveStreamSink(IMFFinalizableMediaSink *iface
 
 static HRESULT WINAPI media_sink_GetStreamSinkCount(IMFFinalizableMediaSink *iface, DWORD *count)
 {
-    FIXME("iface %p, count %p stub!\n", iface, count);
+    struct media_sink *media_sink = impl_from_IMFFinalizableMediaSink(iface);
 
-    return E_NOTIMPL;
+    TRACE("iface %p, count %p.\n", iface, count);
+
+    if (!count)
+        return E_POINTER;
+
+    EnterCriticalSection(&media_sink->cs);
+    *count = list_count(&media_sink->stream_sinks);
+    LeaveCriticalSection(&media_sink->cs);
+
+    return S_OK;
 }
 
 static HRESULT WINAPI media_sink_GetStreamSinkByIndex(IMFFinalizableMediaSink *iface, DWORD index,