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timing changes

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This commit is contained in:
dborth 2008-10-21 23:07:16 +00:00
parent f641aba760
commit a17c9f74a5
3 changed files with 52 additions and 68 deletions
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48
source/ngc/fceugx.c
View File

@ -41,12 +41,6 @@ int ConfigRequested = 0;
bool isWii;
uint8 *xbsave=NULL;
long long prev;
long long now;
long long gettime();
u32 diff_usec(long long start,long long end);
extern bool romLoaded;
extern int cleanSFMDATA();
@ -55,44 +49,6 @@ extern uint8 FDSBIOS[8192];
void FCEUD_Update(uint8 *XBuf, int32 *Buffer, int Count);
/****************************************************************************
* setFrameTimer()
* change frame timings depending on whether ROM is NTSC or PAL
***************************************************************************/
int normaldiff;
void setFrameTimer()
{
if (GCSettings.timing) // PAL
{
if(vmode_60hz == 1)
normaldiff = 20000; // 50hz
else
normaldiff = 16667; // 60hz
}
else
{
if(vmode_60hz == 1)
normaldiff = 16667; // 60hz
else
normaldiff = 20000; // 50hz
}
FrameTimer = 0;
prev = gettime();
}
void SyncSpeed()
{
now = gettime();
int diff = normaldiff - diff_usec(prev, now);
if (diff > 0) // ahead - take a nap
usleep(diff);
prev = now;
FrameTimer--;
}
/****************************************************************************
* ipl_set_config
* lowlevel Qoob Modchip disable
@ -219,12 +175,8 @@ int main(int argc, char *argv[])
ConfigRequested = 0;
break; // leave emulation loop
}
SyncSpeed();
}
}
return 0;
}
/****************************************************************************

42
source/ngc/gcvideo.c
View File

@ -20,6 +20,7 @@
#include "driver.h"
#include "gcvideo.h"
#include "fceuconfig.h"
#include "images/nesback.h"
extern unsigned int SMBTimer;
@ -54,7 +55,39 @@ static Mtx projectionMatrix,modelViewMatrix;
void CheesyScale(unsigned char *XBuf);
int whichfb = 0;
int copynow = GX_FALSE;
u32 FrameTimer = 0;
long long prev;
long long now;
long long gettime();
u32 diff_usec(long long start,long long end);
/****************************************************************************
* setFrameTimer()
* change frame timings depending on whether ROM is NTSC or PAL
***************************************************************************/
int normaldiff;
void setFrameTimer()
{
if (GCSettings.timing == 1) // PAL
normaldiff = 20000; // 50hz
else
normaldiff = 16667; // 60hz
prev = gettime();
}
void SyncSpeed()
{
now = gettime();
int diff = normaldiff - diff_usec(prev, now);
if (diff > 0) // ahead - take a nap
usleep(diff);
prev = now;
}
/****************************************************************************
* VideoThreading
@ -67,8 +100,8 @@ static unsigned char vbstack[TSTACK];
/****************************************************************************
* vbgetback
*
* This callback enables the emulator to keep running while waiting for a
* vertical blank.
* This callback enables the emulator to keep running while managing proper
* timing
*
* Putting LWP to good use :)
***************************************************************************/
@ -77,7 +110,7 @@ vbgetback (void *arg)
{
while (1)
{
VIDEO_WaitVSync (); /**< Wait for video vertical blank */
SyncSpeed();
LWP_SuspendThread (vbthread);
}
@ -112,7 +145,6 @@ static void copy_to_xfb()
copynow = GX_FALSE;
}
SMBTimer++;
FrameTimer++;
// FDS switch disk requested - need to eject, select, and insert
// but not all at once!

2
source/ngc/gcvideo.h
View File

@ -16,6 +16,7 @@ void clearscreen ();
void showscreen ();
void initDisplay();
void RenderFrame(char *XBuf, int style);
void setFrameTimer();
// color palettes
#define MAXPAL 12
@ -29,6 +30,5 @@ extern struct st_palettes palettes[];
extern int FDSSwitchRequested;
extern int vmode_60hz;
extern bool progressive;
extern u32 FrameTimer;
#endif