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Implement frame pacing for Windows using D3DKMTWaitForVerticalBlankEvent

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This commit is contained in:
Cameron Gutman
2018-08-16 01:29:53 -07:00
parent 8e257ab241
commit 404eaa44e4
3 changed files with 160 additions and 7 deletions
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app/streaming/video/ffmpeg-renderers/pacer/dxvsyncsource.h
+32
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@@ -2,6 +2,32 @@
#include "pacer.h"
#include <SDL_syswm.h>
// from <D3dkmthk.h>
typedef LONG NTSTATUS;
typedef UINT D3DKMT_HANDLE;
typedef UINT D3DDDI_VIDEO_PRESENT_SOURCE_ID;
#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
#define STATUS_GRAPHICS_PRESENT_OCCLUDED ((NTSTATUS)0xC01E0006L)
typedef struct _D3DKMT_OPENADAPTERFROMHDC {
HDC hDc;
D3DKMT_HANDLE hAdapter;
LUID AdapterLuid;
D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId;
} D3DKMT_OPENADAPTERFROMHDC;
typedef struct _D3DKMT_CLOSEADAPTER {
D3DKMT_HANDLE hAdapter;
} D3DKMT_CLOSEADAPTER;
typedef struct _D3DKMT_WAITFORVERTICALBLANKEVENT {
D3DKMT_HANDLE hAdapter;
D3DKMT_HANDLE hDevice;
D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId;
} D3DKMT_WAITFORVERTICALBLANKEVENT;
typedef NTSTATUS(APIENTRY* PFND3DKMTOPENADAPTERFROMHDC)(D3DKMT_OPENADAPTERFROMHDC*);
typedef NTSTATUS(APIENTRY* PFND3DKMTCLOSEADAPTER)(D3DKMT_CLOSEADAPTER*);
typedef NTSTATUS(APIENTRY* PFND3DKMTWAITFORVERTICALBLANKEVENT)(D3DKMT_WAITFORVERTICALBLANKEVENT*);
class DxVsyncSource : public IVsyncSource
{
public:
@@ -17,4 +43,10 @@ private:
Pacer* m_Pacer;
SDL_Thread* m_Thread;
SDL_atomic_t m_Stopping;
HMODULE m_Gdi32Handle;
HWND m_Window;
PFND3DKMTOPENADAPTERFROMHDC m_D3DKMTOpenAdapterFromHdc;
PFND3DKMTCLOSEADAPTER m_D3DKMTCloseAdapter;
PFND3DKMTWAITFORVERTICALBLANKEVENT m_D3DKMTWaitForVerticalBlankEvent;
};