static int set_relative_speed(int val, void *param)
{
relative_speed = val;
sound_set_relative_speed(relative_speed);
set_timer_speed(relative_speed);
return 0;
}
static int set_warp_mode(int val, void *param)
{
warp_mode_enabled = val;
sound_set_warp_mode(warp_mode_enabled);
set_timer_speed(relative_speed);
return 0;
}
int vsync_do_vsync(struct video_canvas_s *c, int been_skipped)
{
static long skip_counter = 0;
static int num_skipped_frames = 0;
static int frame_counter = 0;
int skip_next_frame = 0;
vsync_hook();
set_timer_speed();
if (been_skipped) {
num_skipped_frames++;
}
if (timer_patch > 0) {
timer_patch--;
asm volatile ("cli");
elapsed_frames++;
asm volatile ("sti");
}
void vsync_set_machine_parameter(double refresh_rate, long cycles)
{
refresh_frequency = refresh_rate;
cycles_per_sec = cycles;
set_timer_speed(relative_speed);
}
/* This is called at the end of each screen frame. It flushes the audio buffer
and keeps control of the emulation speed. */
int vsync_do_vsync(int been_skipped)
{
static unsigned short frame_counter = USHRT_MAX;
static unsigned short num_skipped_frames;
static int skip_counter;
int skip_next_frame = 0;
vsync_hook();
if (been_skipped) num_skipped_frames++;
if (timer_speed != relative_speed) {
frame_counter = USHRT_MAX;
if (set_timer_speed(relative_speed) < 0) {
log_error(LOG_DEFAULT, "Trouble setting timers... giving up.");
/* FIXME: Hm, maybe we should be smarter. But this is should
never happen.*/
exit(-1);
}
}
if (warp_mode_enabled) {
/* "Warp Mode". Just skip as many frames as possible and do not
limit the maximum speed at all. */
if (skip_counter < MAX_SKIPPED_FRAMES) {
skip_next_frame = 1;
skip_counter++;
}
else skip_counter = elapsed_frames = 0;
sound_flush(0);
}
else
if (refresh_rate != 0) {
update_elapsed_frames(0); /* Fixed refresh rate. */
if (timer_speed && skip_counter >= elapsed_frames) timer_sleep();
if (skip_counter < refresh_rate - 1) {
skip_next_frame = 1;
skip_counter++;
}
else skip_counter = elapsed_frames = 0;
patch_timer(sound_flush(relative_speed));
}
else
{
/* Dynamically adjusted refresh rate. */
update_elapsed_frames(0);
if (skip_counter >= elapsed_frames) {
elapsed_frames = -1;
timer_sleep();
skip_counter = 0;
}
else
if (skip_counter < MAX_SKIPPED_FRAMES) {
skip_next_frame = 1;
skip_counter++;
}
else skip_counter = elapsed_frames = 0;
patch_timer(sound_flush(relative_speed));
}
if (frame_counter >= refresh_frequency * 2) {
display_speed(frame_counter + 1 - num_skipped_frames);
num_skipped_frames = 0;
frame_counter = 0;
} else
frame_counter++;
kbdbuf_flush();
#ifdef HAS_JOYSTICK
joystick_update();
#endif
return skip_next_frame;
}
int vsync_disable_timer(void)
{
if (!timer_disabled) return set_timer_speed(0);
else return 0;
}
