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Merge pull request #3961 from phire/less_virtual_xfb_lag

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XFB: Send image to screen at start of field (Reduce VirtualXFB latency)
This commit is contained in:
Pierre Bourdon 2016-07-10 03:01:26 +02:00 committed by GitHub
commit 7ee6d08213
3 changed files with 8 additions and 18 deletions
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5
Source/Core/Core/HW/VideoInterface.cpp
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@ -700,13 +700,16 @@ static void BeginField(FieldType field)
DEBUG_LOG(VIDEOINTERFACE, "HorizScaling: %04x | fbwidth %d | %u | %u", m_HorizontalScaling.Hex,
m_FBWidth.Hex, GetTicksPerEvenField(), GetTicksPerOddField());
// This assumes the game isn't going to change the VI registers while a
// frame is scanning out.
// To correctly handle that case we would need to collate all changes
// to VI during scanout and delay outputting the frame till then.
if (xfbAddr)
g_video_backend->Video_BeginField(xfbAddr, fbWidth, fbStride, fbHeight);
}
static void EndField()
{
g_video_backend->Video_EndField();
Core::VideoThrottle();
}

20
Source/Core/VideoCommon/MainBase.cpp
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@ -48,18 +48,6 @@ void VideoBackendBase::Video_ExitLoop()
// Run from the CPU thread (from VideoInterface.cpp)
void VideoBackendBase::Video_BeginField(u32 xfbAddr, u32 fbWidth, u32 fbStride, u32 fbHeight)
{
if (m_initialized && g_ActiveConfig.bUseXFB)
{
s_beginFieldArgs.xfbAddr = xfbAddr;
s_beginFieldArgs.fbWidth = fbWidth;
s_beginFieldArgs.fbStride = fbStride;
s_beginFieldArgs.fbHeight = fbHeight;
}
}
// Run from the CPU thread (from VideoInterface.cpp)
void VideoBackendBase::Video_EndField()
{
if (m_initialized && g_ActiveConfig.bUseXFB && g_renderer)
{
@ -69,10 +57,10 @@ void VideoBackendBase::Video_EndField()
e.time = 0;
e.type = AsyncRequests::Event::SWAP_EVENT;
e.swap_event.xfbAddr = s_beginFieldArgs.xfbAddr;
e.swap_event.fbWidth = s_beginFieldArgs.fbWidth;
e.swap_event.fbStride = s_beginFieldArgs.fbStride;
e.swap_event.fbHeight = s_beginFieldArgs.fbHeight;
e.swap_event.xfbAddr = xfbAddr;
e.swap_event.fbWidth = fbWidth;
e.swap_event.fbStride = fbStride;
e.swap_event.fbHeight = fbHeight;
AsyncRequests::GetInstance()->PushEvent(e, false);
}
}

1
Source/Core/VideoCommon/VideoBackendBase.h
View File

@ -81,7 +81,6 @@ public:
virtual void Video_Cleanup() = 0; // called from gl/d3d thread
void Video_BeginField(u32, u32, u32, u32);
void Video_EndField();
u32 Video_AccessEFB(EFBAccessType, u32, u32, u32);
u32 Video_GetQueryResult(PerfQueryType type);