Dmitry Sergeev
38 lines
840 B
Go
38 lines
840 B
Go
package main
|
|
|
|
import "mxl-player/internal/playback"
|
|
|
|
// videoDropTracker counts gaps only within one playback generation. Frame
|
|
// indices belong to their source and cannot be compared across feed changes.
|
|
type videoDropTracker struct {
|
|
generation uint64
|
|
source playback.FeedConfig
|
|
lastIndex uint64
|
|
hasIndex bool
|
|
}
|
|
|
|
func (t *videoDropTracker) Observe(
|
|
generation uint64,
|
|
source playback.FeedConfig,
|
|
index uint64,
|
|
) uint64 {
|
|
if !t.hasIndex ||
|
|
generation != t.generation ||
|
|
!sameVideoSource(source, t.source) ||
|
|
index <= t.lastIndex {
|
|
t.generation = generation
|
|
t.source = source
|
|
t.lastIndex = index
|
|
t.hasIndex = true
|
|
return 0
|
|
}
|
|
|
|
dropped := index - t.lastIndex - 1
|
|
t.lastIndex = index
|
|
return dropped
|
|
}
|
|
|
|
func sameVideoSource(a, b playback.FeedConfig) bool {
|
|
return a.Domain == b.Domain && a.UUID == b.UUID
|
|
}
|