Dmitry Sergeev
53 lines
979 B
Go
53 lines
979 B
Go
package playback
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import "time"
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type PlaylistTimingState struct {
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Revision uint64
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Duration time.Duration
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Started bool
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Deadline time.Time
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}
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func NewPlaylistTiming(
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revision uint64,
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duration time.Duration,
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) PlaylistTimingState {
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return PlaylistTimingState{
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Revision: revision,
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Duration: duration,
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}
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}
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func StartPlaylistTiming(
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current PlaylistTimingState,
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revision uint64,
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now time.Time,
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) (PlaylistTimingState, bool) {
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if revision != current.Revision || current.Duration <= 0 || current.Started {
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return current, false
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}
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next := current
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next.Started = true
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next.Deadline = now.Add(current.Duration)
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return next, true
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}
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func ExpirePlaylistTiming(
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current PlaylistTimingState,
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revision uint64,
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now time.Time,
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) (PlaylistTimingState, bool) {
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if revision != current.Revision ||
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!current.Started ||
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now.Before(current.Deadline) {
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return current, false
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}
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next := current
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next.Started = false
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next.Deadline = time.Time{}
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return next, true
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}
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