Zebediah Figura : quartz/videorenderer: Get rid of hEvent.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: eca7b245f0951a5204f35f4c12749d4164cba7c7
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=eca7b245f0951a5204f35f4c12749d4164cba7c7

Author: Zebediah Figura <z.figura12 at gmail.com>
Date:   Tue Oct 22 18:30:04 2019 -0500

quartz/videorenderer: Get rid of hEvent.

This event was at various times used for several different purposes. The only
current use is apparently to prevent stale samples from being rendered after
IPin::EndFlush() completes, but in practice there's actually no foolproof way
to prevent this race in the video renderer. On the other hand, as long as the
filter driving the graph can ensure this, there's no need to do so.

Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/quartz/videorenderer.c | 36 ------------------------------------
 1 file changed, 36 deletions(-)

diff --git a/dlls/quartz/videorenderer.c b/dlls/quartz/videorenderer.c
index a11c2047a6..be66d52c42 100644
--- a/dlls/quartz/videorenderer.c
+++ b/dlls/quartz/videorenderer.c
@@ -46,7 +46,6 @@ typedef struct VideoRendererImpl
 
     BOOL init;
 
-    HANDLE hEvent;
     RECT SourceRect;
     RECT DestRect;
     RECT WindowPos;
@@ -218,11 +217,9 @@ static HRESULT WINAPI VideoRenderer_DoRenderSample(BaseRenderer* iface, IMediaSa
     }
 #endif
 
-    SetEvent(This->hEvent);
     if (This->renderer.filter.state == State_Paused)
     {
         VideoRenderer_SendSampleData(This, pbSrcStream, cbSrcStream);
-        SetEvent(This->hEvent);
         if (This->renderer.filter.state == State_Paused)
         {
             /* Flushing */
@@ -287,34 +284,12 @@ static HRESULT WINAPI VideoRenderer_CheckMediaType(BaseRenderer *iface, const AM
     return S_FALSE;
 }
 
-static HRESULT WINAPI VideoRenderer_EndFlush(BaseRenderer* iface)
-{
-    VideoRendererImpl *This = impl_from_BaseRenderer(iface);
-
-    TRACE("(%p)->()\n", iface);
-
-    if (This->renderer.pMediaSample) {
-        ResetEvent(This->hEvent);
-        LeaveCriticalSection(&iface->filter.csFilter);
-        LeaveCriticalSection(&iface->csRenderLock);
-        WaitForSingleObject(This->hEvent, INFINITE);
-        EnterCriticalSection(&iface->csRenderLock);
-        EnterCriticalSection(&iface->filter.csFilter);
-    }
-    if (This->renderer.filter.state == State_Paused) {
-        ResetEvent(This->hEvent);
-    }
-
-    return BaseRendererImpl_EndFlush(iface);
-}
-
 static void video_renderer_destroy(BaseRenderer *iface)
 {
     VideoRendererImpl *filter = impl_from_BaseRenderer(iface);
 
     BaseControlWindow_Destroy(&filter->baseControlWindow);
     BaseControlVideo_Destroy(&filter->baseControlVideo);
-    CloseHandle(filter->hEvent);
 
     strmbase_renderer_cleanup(&filter->renderer);
     CoTaskMemFree(filter);
@@ -354,7 +329,6 @@ static void video_renderer_stop_stream(BaseRenderer *iface)
 
     TRACE("(%p)->()\n", This);
 
-    SetEvent(This->hEvent);
     if (This->baseControlWindow.AutoShow)
         /* Black it out */
         RedrawWindow(This->baseControlWindow.baseWindow.hWnd, NULL, NULL, RDW_INVALIDATE|RDW_ERASE);
@@ -370,10 +344,7 @@ static void video_renderer_start_stream(BaseRenderer *iface)
         && (This->renderer.filter.state == State_Stopped || !This->renderer.sink.end_of_stream))
     {
         if (This->renderer.filter.state == State_Stopped)
-        {
-            ResetEvent(This->hEvent);
             VideoRenderer_AutoShowWindow(This);
-        }
     }
 }
 
@@ -409,7 +380,6 @@ static const BaseRendererFuncTable BaseFuncTable =
     .renderer_start_stream = video_renderer_start_stream,
     .renderer_stop_stream = video_renderer_stop_stream,
     .pfnShouldDrawSampleNow = VideoRenderer_ShouldDrawSampleNow,
-    .pfnEndFlush = VideoRenderer_EndFlush,
     .renderer_destroy = video_renderer_destroy,
     .renderer_query_interface = video_renderer_query_interface,
     .renderer_pin_query_interface = video_renderer_pin_query_interface,
@@ -594,7 +564,6 @@ static HRESULT WINAPI VideoRenderer_Pause(IBaseFilter * iface)
         if (This->renderer.filter.state == State_Stopped)
         {
             This->renderer.sink.end_of_stream = 0;
-            ResetEvent(This->hEvent);
             VideoRenderer_AutoShowWindow(This);
         }
 
@@ -858,13 +827,8 @@ HRESULT VideoRenderer_create(IUnknown *outer, void **out)
     if (FAILED(hr))
         goto fail;
 
-    pVideoRenderer->hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
-
     if (FAILED(hr = BaseWindowImpl_PrepareWindow(&pVideoRenderer->baseControlWindow.baseWindow)))
-    {
-        CloseHandle(pVideoRenderer->hEvent);
         goto fail;
-    }
 
     *out = &pVideoRenderer->renderer.filter.IUnknown_inner;
     return S_OK;