Class: shaka.media.SegmentPrefetch

This class manages segment prefetch operations. Called by StreamingEngine to prefetch next N segments ahead of playhead, to reduce the chances of rebuffering.

Constructor

new SegmentPrefetch(prefetchLimit, stream, fetchDispatcher)

This class manages segment prefetch operations. Called by StreamingEngine to prefetch next N segments ahead of playhead, to reduce the chances of rebuffering.

Parameters:
Name Type Description
prefetchLimit number
stream shaka.extern.Stream
fetchDispatcher shaka.media.SegmentPrefetch.FetchDispatcher
Source:

Members

fetchDispatcher_ :shaka.media.SegmentPrefetch.FetchDispatcher

Type:
Source:

prefetchLimit_ :number

Type:
  • number
Source:

prefetchPosTime_ :number

Type:
  • number
Source:

segmentPrefetchMap_ :Map.<!(shaka.media.SegmentReference|shaka.media.InitSegmentReference), !shaka.media.SegmentPrefetchOperation>

Type:
Source:

stream_ :shaka.extern.Stream

Type:
Source:

Methods

logPrefix_() → {string}

The prefix of the logs that are created in this class.
Source:
Returns:
Type
string

abortPrefetchedSegment_(referencenon-null)

Remove a segment from prefetch map and abort it.
Parameters:
Name Type Description
reference shaka.media.SegmentReference | shaka.media.InitSegmentReference
Source:

clearAll()

Clear all segment data.
Source:

getPrefetchedSegment(referencenon-null, streamDataCallbacknullable) → {shaka.net.NetworkingEngine.PendingRequest}

Get the result of prefetched segment if already exists.
Parameters:
Name Type Attributes Description
reference shaka.media.SegmentReference | shaka.media.InitSegmentReference
streamDataCallback ?function(BufferSource):!Promise= <nullable>
Source:
Returns:
op
Type
shaka.net.NetworkingEngine.PendingRequest

prefetchInitSegment(initSegmentReferencenon-null)

Fetch init segment.
Parameters:
Name Type Description
initSegmentReference shaka.media.InitSegmentReference
Source:

prefetchSegments(startReference, skipFirstopt)

Fetch next segments ahead of current segment.
Parameters:
Name Type Attributes Default Description
startReference shaka.media.SegmentReference
skipFirst boolean <optional>
 false
Source:

resetLimit(newPrefetchLimit)

Reset the prefetchLimit and clear all internal states. Called by StreamingEngine when configure() was called.
Parameters:
Name Type Description
newPrefetchLimit number
Source:

switchStream(stream)

Called by Streaming Engine when switching variant.
Parameters:
Name Type Description
stream shaka.extern.Stream
Source:

Type Definitions

FetchDispatcher

A callback function that fetches a segment.
Type:
Source: