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make func

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This commit is contained in:
Logan McNaughton
2023-10-06 21:39:54 -06:00
parent 14b1c88304
commit 2c677ddb0c
1 changed files with 23 additions and 19 deletions
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src/device/vi.rs
+23 -19
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@@ -129,25 +129,7 @@ pub fn vertical_interrupt_event(device: &mut device::Device) {
}
*/
let elapsed = device.vi.last_vi_time.elapsed();
if elapsed <= device.vi.vi_period {
let sleep_time = device.vi.vi_period - elapsed;
let remaining_holdover_space = device.vi.vi_period - device.vi.holdover; // holdover can't exceed the vi period
if sleep_time <= remaining_holdover_space {
device.vi.holdover += sleep_time; // donate all time to the holdover
} else {
device.vi.holdover += remaining_holdover_space; // max out holdover
std::thread::sleep(sleep_time - remaining_holdover_space); // sleep the rest of the time
}
} else {
let over_time = elapsed - device.vi.vi_period; // this is how much we overshot the vi period
if over_time <= device.vi.holdover {
device.vi.holdover -= over_time; // consume some holdover
} else {
device.vi.holdover -= device.vi.holdover; // consume all holdover
}
}
device.vi.last_vi_time = std::time::Instant::now();
speed_limiter(device);
/* toggle vi field if in interlaced mode */
device.vi.field ^= (device.vi.regs[VI_STATUS_REG as usize] >> 6) & 0x1;
@@ -181,3 +163,25 @@ pub fn init(device: &mut device::Device) {
});
*/
}
pub fn speed_limiter(device: &mut device::Device) {
let elapsed = device.vi.last_vi_time.elapsed();
if elapsed <= device.vi.vi_period {
let sleep_time = device.vi.vi_period - elapsed;
let remaining_holdover_space = device.vi.vi_period - device.vi.holdover; // holdover can't exceed the vi period
if sleep_time <= remaining_holdover_space {
device.vi.holdover += sleep_time; // donate all time to the holdover
} else {
device.vi.holdover += remaining_holdover_space; // max out holdover
std::thread::sleep(sleep_time - remaining_holdover_space); // sleep the rest of the time
}
} else {
let over_time = elapsed - device.vi.vi_period; // this is how much we overshot the vi period
if over_time <= device.vi.holdover {
device.vi.holdover -= over_time; // consume some holdover
} else {
device.vi.holdover -= device.vi.holdover; // consume all holdover
}
}
device.vi.last_vi_time = std::time::Instant::now();
}