mirror of
https://github.com/moonlight-stream/moonlight-qt
synced 2024-12-15 05:42:28 +00:00
172 lines
5.8 KiB
C++
172 lines
5.8 KiB
C++
#include "dxvsyncsource.h"
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// Useful references:
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// https://bugs.chromium.org/p/chromium/issues/detail?id=467617
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// https://chromium.googlesource.com/chromium/src.git/+/c564f2fe339b2b2abb0c8773c90c83215670ea71/gpu/ipc/service/gpu_vsync_provider_win.cc
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DxVsyncSource::DxVsyncSource(Pacer* pacer) :
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m_Pacer(pacer),
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m_Thread(nullptr),
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m_Gdi32Handle(nullptr)
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{
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SDL_AtomicSet(&m_Stopping, 0);
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}
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DxVsyncSource::~DxVsyncSource()
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{
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if (m_Thread != nullptr) {
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SDL_AtomicSet(&m_Stopping, 1);
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SDL_WaitThread(m_Thread, nullptr);
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}
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if (m_Gdi32Handle != nullptr) {
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FreeLibrary(m_Gdi32Handle);
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}
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}
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bool DxVsyncSource::initialize(SDL_Window* window, int displayFps)
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{
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m_DisplayFps = displayFps;
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m_Gdi32Handle = LoadLibraryA("gdi32.dll");
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if (m_Gdi32Handle == nullptr) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"Failed to load gdi32.dll: %d",
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GetLastError());
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return false;
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}
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m_D3DKMTOpenAdapterFromHdc = (PFND3DKMTOPENADAPTERFROMHDC)GetProcAddress(m_Gdi32Handle, "D3DKMTOpenAdapterFromHdc");
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m_D3DKMTCloseAdapter = (PFND3DKMTCLOSEADAPTER)GetProcAddress(m_Gdi32Handle, "D3DKMTCloseAdapter");
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m_D3DKMTWaitForVerticalBlankEvent = (PFND3DKMTWAITFORVERTICALBLANKEVENT)GetProcAddress(m_Gdi32Handle, "D3DKMTWaitForVerticalBlankEvent");
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if (m_D3DKMTOpenAdapterFromHdc == nullptr ||
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m_D3DKMTCloseAdapter == nullptr ||
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m_D3DKMTWaitForVerticalBlankEvent == nullptr) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"Missing required function in gdi32.dll");
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return false;
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}
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SDL_SysWMinfo info;
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SDL_VERSION(&info.version);
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if (!SDL_GetWindowWMInfo(window, &info)) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"SDL_GetWindowWMInfo() failed: %s",
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SDL_GetError());
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return false;
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}
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m_Window = info.info.win.window;
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m_Thread = SDL_CreateThread(vsyncThread, "DX Vsync Thread", this);
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if (m_Thread == nullptr) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"Unable to create DX V-sync thread: %s",
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SDL_GetError());
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return false;
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}
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return true;
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}
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int DxVsyncSource::vsyncThread(void* context)
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{
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DxVsyncSource* me = reinterpret_cast<DxVsyncSource*>(context);
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#if SDL_VERSION_ATLEAST(2, 0, 9)
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SDL_SetThreadPriority(SDL_THREAD_PRIORITY_TIME_CRITICAL);
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#else
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SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH);
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#endif
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D3DKMT_OPENADAPTERFROMHDC openAdapterParams = {};
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HMONITOR lastMonitor = nullptr;
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DEVMODEA monitorMode;
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monitorMode.dmSize = sizeof(monitorMode);
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while (SDL_AtomicGet(&me->m_Stopping) == 0) {
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D3DKMT_WAITFORVERTICALBLANKEVENT waitForVblankEventParams;
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NTSTATUS status;
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// If the monitor has changed from last time, open the new adapter
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HMONITOR currentMonitor = MonitorFromWindow(me->m_Window, MONITOR_DEFAULTTONEAREST);
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if (currentMonitor != lastMonitor) {
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MONITORINFOEXA monitorInfo = {};
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monitorInfo.cbSize = sizeof(monitorInfo);
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if (!GetMonitorInfoA(currentMonitor, &monitorInfo)) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"GetMonitorInfo() failed: %d",
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GetLastError());
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SDL_Delay(10);
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continue;
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}
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if (!EnumDisplaySettingsA(monitorInfo.szDevice, ENUM_CURRENT_SETTINGS, &monitorMode)) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"EnumDisplaySettings() failed: %d",
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GetLastError());
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SDL_Delay(10);
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continue;
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}
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
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"Monitor changed: %s %d Hz",
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monitorInfo.szDevice,
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monitorMode.dmDisplayFrequency);
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if (openAdapterParams.hAdapter != 0) {
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D3DKMT_CLOSEADAPTER closeAdapterParams = {};
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closeAdapterParams.hAdapter = openAdapterParams.hAdapter;
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me->m_D3DKMTCloseAdapter(&closeAdapterParams);
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}
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openAdapterParams.hDc = CreateDCA(nullptr, monitorInfo.szDevice, nullptr, nullptr);
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if (!openAdapterParams.hDc) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"CreateDC() failed: %d",
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GetLastError());
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SDL_Delay(10);
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continue;
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}
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status = me->m_D3DKMTOpenAdapterFromHdc(&openAdapterParams);
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DeleteDC(openAdapterParams.hDc);
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if (status != STATUS_SUCCESS) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"D3DKMTOpenAdapterFromHdc() failed: %x",
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status);
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SDL_Delay(10);
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continue;
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}
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lastMonitor = currentMonitor;
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}
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waitForVblankEventParams.hAdapter = openAdapterParams.hAdapter;
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waitForVblankEventParams.hDevice = 0;
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waitForVblankEventParams.VidPnSourceId = openAdapterParams.VidPnSourceId;
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status = me->m_D3DKMTWaitForVerticalBlankEvent(&waitForVblankEventParams);
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if (status != STATUS_SUCCESS) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
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"D3DKMTWaitForVerticalBlankEvent() failed: %x",
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status);
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SDL_Delay(10);
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continue;
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}
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me->m_Pacer->vsyncCallback(1000 / me->m_DisplayFps);
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}
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if (openAdapterParams.hAdapter != 0) {
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D3DKMT_CLOSEADAPTER closeAdapterParams = {};
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closeAdapterParams.hAdapter = openAdapterParams.hAdapter;
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me->m_D3DKMTCloseAdapter(&closeAdapterParams);
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}
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return 0;
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}
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