30 lines
730 B
Go
30 lines
730 B
Go
|
package astits
|
||
|
|
|
||
|
|
import (
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ClockReference represents a clock reference
|
||
|
|
// Base is based on a 90 kHz clock and extension is based on a 27 MHz clock
|
||
|
|
type ClockReference struct {
|
||
|
|
Base, Extension int
|
||
|
|
}
|
||
|
|
|
||
|
|
// newClockReference builds a new clock reference
|
||
|
|
func newClockReference(base, extension int) *ClockReference {
|
||
|
|
return &ClockReference{
|
||
|
|
Base: base,
|
||
|
|
Extension: extension,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Duration converts the clock reference into duration
|
||
|
|
func (p ClockReference) Duration() time.Duration {
|
||
|
|
return time.Duration(p.Base*1e9/90000) + time.Duration(p.Extension*1e9/27000000)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Time converts the clock reference into time
|
||
|
|
func (p ClockReference) Time() time.Time {
|
||
|
|
return time.Unix(0, p.Duration().Nanoseconds())
|
||
|
|
}
|