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Allow Pacer to wait for frames up until a few ms before v-sync for better smoothness and lower latency

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This commit is contained in:
Cameron Gutman
2018-08-20 17:53:35 -07:00
parent d6e7173af0
commit 6b395c816f
8 changed files with 49 additions and 14 deletions
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app/streaming/video/ffmpeg-renderers/pacer/dxvsyncsource.cpp
+5 -3
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@@ -24,8 +24,10 @@ DxVsyncSource::~DxVsyncSource()
}
}
bool DxVsyncSource::initialize(SDL_Window* window)
bool DxVsyncSource::initialize(SDL_Window* window, int displayFps)
{
m_DisplayFps = displayFps;
m_Gdi32Handle = LoadLibraryA("gdi32.dll");
if (m_Gdi32Handle == nullptr) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
@@ -144,8 +146,6 @@ int DxVsyncSource::vsyncThread(void* context)
waitForVblankEventParams.hDevice = 0;
waitForVblankEventParams.VidPnSourceId = openAdapterParams.VidPnSourceId;
me->m_Pacer->vsyncCallback();
status = me->m_D3DKMTWaitForVerticalBlankEvent(&waitForVblankEventParams);
if (status != STATUS_SUCCESS) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
@@ -154,6 +154,8 @@ int DxVsyncSource::vsyncThread(void* context)
SDL_Delay(10);
continue;
}
me->m_Pacer->vsyncCallback(1000 / me->m_DisplayFps);
}
if (openAdapterParams.hAdapter != 0) {