GST events

event 종류

seeking, navigation, etc.

 

event 방향에 따른 종류

downstream event

• sink pad의 설정된 event handler가 받음
• event의 travel ways
  • in-band
    • buffer와 함께 흐름
  • out-of-band
    • pipeline에 즉각적으로 흐름
    • buffer들을 skip

 

downstream event types

• SEGMENT, CAPS, TAG(metadata), EOS
• segment
  • downstream으로 전달되는 event
  • stream 내 유효한 timestamp의 range를 알려줌
  • push mode 시 source element가 생성
  • pull-based의 demuxer/decoder가 생성
• EOS event
  • source에서 출발
• flush event
  • push mode: ->
  • pull mode: <-

 

upstream event

• sink elemnt에서 시작됨 
• ex. seek event
• types
  • seek, QoS, reconfigure event