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This commit is contained in:
twinaphex 2018-02-02 22:50:07 +01:00
parent 535012f8bf
commit 88cb40834c
2 changed files with 13 additions and 7 deletions
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17
gfx/video_driver.c
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@ -1303,26 +1303,31 @@ bool video_monitor_fps_statistics(double *refresh_rate,
double *deviation, unsigned *sample_points)
{
unsigned i;
retro_time_t accum = 0, avg, accum_var = 0;
unsigned samples = MIN(MEASURE_FRAME_TIME_SAMPLES_COUNT,
(unsigned)video_driver_frame_time_count);
retro_time_t accum = 0;
retro_time_t avg = 0;
retro_time_t accum_var = 0;
unsigned samples = 0;
#ifdef HAVE_THREADS
if (video_driver_is_threaded())
return false;
#endif
samples = MIN(MEASURE_FRAME_TIME_SAMPLES_COUNT,
(unsigned)video_driver_frame_time_count);
if (samples < 2)
return false;
/* Measure statistics on frame time (microsecs), *not* FPS. */
for (i = 0; i < samples; i++)
{
accum += video_driver_frame_time_samples[i];
#if 0
for (i = 0; i < samples; i++)
RARCH_LOG("[Video]: Interval #%u: %d usec / frame.\n",
i, (int)frame_time_samples[i]);
#endif
}
avg = accum / samples;
@ -1330,7 +1335,7 @@ bool video_monitor_fps_statistics(double *refresh_rate,
for (i = 0; i < samples; i++)
{
retro_time_t diff = video_driver_frame_time_samples[i] - avg;
accum_var += diff * diff;
accum_var += diff * diff;
}
*deviation = sqrt((double)accum_var / (samples - 1)) / avg;

3
menu/menu_setting.c
View File

@ -1465,7 +1465,8 @@ setting_get_string_representation_st_float_video_refresh_rate_auto(
if (!setting)
return;
if (video_monitor_fps_statistics(&video_refresh_rate, &deviation, &sample_points))
if (video_monitor_fps_statistics(&video_refresh_rate,
&deviation, &sample_points))
{
snprintf(s, len, "%.3f Hz (%.1f%% dev, %u samples)",
video_refresh_rate, 100.0 * deviation, sample_points);