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displayconfig: treat a refresh rate of 1 as invalid

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Found in Windows 8.1/VirtualBox.
This commit is contained in:
James Ross-Gowan 2016-09-18 15:40:18 +10:00
parent 554c3a1bda
commit f8659d0013
1 changed files with 8 additions and 2 deletions
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10
video/out/win32/displayconfig.c
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@ -94,6 +94,12 @@ static LONG (WINAPI *pQueryDisplayConfig)(UINT32, UINT32*,
DISPLAYCONFIG_PATH_INFO*, UINT32*, DISPLAYCONFIG_MODE_INFO*,
DISPLAYCONFIG_TOPOLOGY_ID*);
static bool is_valid_refresh_rate(DISPLAYCONFIG_RATIONAL rr)
{
// DisplayConfig sometimes reports a rate of 1 when the rate is not known
return rr.Denominator != 0 && rr.Numerator / rr.Denominator > 1;
}
static void displayconfig_load(void)
{
HMODULE user32 = GetModuleHandleW(L"user32.dll");
@ -189,7 +195,7 @@ static double get_refresh_rate_from_mode(DISPLAYCONFIG_MODE_INFO *mode)
DISPLAYCONFIG_VIDEO_SIGNAL_INFO *info =
&mode->targetMode.targetVideoSignalInfo;
if (info->vSyncFreq.Denominator == 0)
if (!is_valid_refresh_rate(info->vSyncFreq))
return 0.0;
return ((double)info->vSyncFreq.Numerator) /
@ -225,7 +231,7 @@ double mp_w32_displayconfig_get_refresh_rate(const wchar_t *device)
freq = get_refresh_rate_from_mode(&modes[path->targetInfo.modeInfoIdx]);
// If the mode didn't contain a valid refresh rate, try the path
if (freq == 0.0 && path->targetInfo.refreshRate.Denominator != 0) {
if (freq == 0.0 && is_valid_refresh_rate(path->targetInfo.refreshRate)) {
freq = ((double)path->targetInfo.refreshRate.Numerator) /
((double)path->targetInfo.refreshRate.Denominator);
}