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For Qt GUI, edit frame throttling logic when using turbo mode or really fast emulation speed to not be so wasteful when emulation is paused. Don't make sense to waste CPU resources spinning on nothing. Fixes #681.

This commit is contained in:
harry 2024-01-28 08:15:00 -05:00
parent c50c1d570c
commit a85f348e50
1 changed files with 17 additions and 2 deletions
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19
src/drivers/Qt/sdl-throttle.cpp
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@ -365,7 +365,12 @@ static int highPrecSleep( FCEU::timeStampRecord &ts )
int
SpeedThrottle(void)
{
if ( (g_fpsScale >= 32) || (NoWaiting & 0x01) || turbo )
bool isEmuPaused = FCEUI_EmulationPaused() ? true : false;
bool noWaitActive = (NoWaiting & 0x01) ? true : false;
bool turboActive = (turbo || noWaitActive);
// If Emulator is paused, don't waste CPU cycles spinning on nothing.
if ( !isEmuPaused && ((g_fpsScale >= 32) || turboActive) )
{
return 0; /* Done waiting */
}
@ -397,6 +402,16 @@ SpeedThrottle(void)
time_left = Nexttime - cur_time;
}
// If Emulator is paused, ensure that sleep time cannot be zero
// we don't want to waste a full CPU core on nothing.
if (isEmuPaused)
{
if (time_left.toMilliSeconds() < 1)
{
time_left.fromMilliSeconds(1);
}
}
if (time_left.toMilliSeconds() > 50)
{
time_left.fromMilliSeconds(50);
@ -407,7 +422,7 @@ SpeedThrottle(void)
{
InFrame = 0;
}
//fprintf(stderr, "attempting to sleep %Ld ms, frame complete=%s\n",
// time_left, InFrame?"no":"yes");