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melonDS
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framerate limiter that sucks less, based off SDL2_gfx

This commit is contained in:
StapleButter 2017-05-10 01:42:53 +02:00
parent 9fe24cb1e7
commit 63e15d2480
1 changed files with 24 additions and 12 deletions
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36
src/wx/main.cpp
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@ -371,7 +371,9 @@ wxThread::ExitCode EmuThread::Entry()
axismask = 0; axismask = 0;
u32 nframes = 0; u32 nframes = 0;
u32 lasttick = SDL_GetTicks(); u32 starttick = SDL_GetTicks();
u32 lasttick = starttick;
u32 lastmeasuretick = lasttick;
u32 fpslimitcount = 0; u32 fpslimitcount = 0;
for (;;) for (;;)
@ -384,8 +386,6 @@ wxThread::ExitCode EmuThread::Entry()
if (emustatus == 1) if (emustatus == 1)
{ {
u32 starttick = SDL_GetTicks();
NDS::RunFrame(); NDS::RunFrame();
SDL_LockTexture(sdltex, NULL, &texpixels, &texstride); SDL_LockTexture(sdltex, NULL, &texpixels, &texstride);
@ -409,21 +409,31 @@ wxThread::ExitCode EmuThread::Entry()
SDL_RenderCopy(sdlrend, sdltex, &botsrc, &botdst); SDL_RenderCopy(sdlrend, sdltex, &botsrc, &botdst);
SDL_RenderPresent(sdlrend); SDL_RenderPresent(sdlrend);
fpslimitcount++; // framerate limiter based off SDL2_gfx
if (fpslimitcount >= 3) fpslimitcount = 0; float framerate = 1000.0f / 60.0f;
u32 frametime = (fpslimitcount == 0) ? 16 : 17;
u32 endtick = SDL_GetTicks(); fpslimitcount++;
u32 diff = endtick - starttick; u32 curtick = SDL_GetTicks();
if (diff < frametime) u32 delay = curtick - lasttick;
Sleep(frametime - diff); lasttick = curtick;
u32 wantedtick = starttick + (u32)((float)fpslimitcount * framerate);
if (curtick < wantedtick)
{
Sleep(wantedtick - curtick);
}
else
{
fpslimitcount = 0;
starttick = curtick;
}
nframes++; nframes++;
if (nframes >= 30) if (nframes >= 30)
{ {
u32 tick = SDL_GetTicks(); u32 tick = SDL_GetTicks();
u32 diff = tick - lasttick; u32 diff = tick - lastmeasuretick;
lasttick = tick; lastmeasuretick = tick;
u32 fps = (nframes * 1000) / diff; u32 fps = (nframes * 1000) / diff;
nframes = 0; nframes = 0;
@ -437,6 +447,8 @@ wxThread::ExitCode EmuThread::Entry()
{ {
nframes = 0; nframes = 0;
lasttick = SDL_GetTicks(); lasttick = SDL_GetTicks();
starttick = lasttick;
lastmeasuretick = lasttick;
fpslimitcount = 0; fpslimitcount = 0;
Sleep(50); Sleep(50);