Class: shaka.abr.SimpleLLAbrManager

This defines the default Low Latency ABR manager for the Player

Constructor

new SimpleLLAbrManager()

This defines the default Low Latency ABR manager for the Player

Implements:
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Members

bandwidthEstimator_ :shaka.abr.SlidingPercentileBandwidthEstimator

Type:
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bufferingTimeToDecreaseBitrate_ :number

Type:
  • number
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config_ :shaka.extern.AbrConfiguration

Type:
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consecutiveFailedIncreaseVideoBitrateCount_ :number

Type:
  • number
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currentBitrate_ :number

Type:
  • number
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currentVariant_ :shaka.extern.Variant

Type:
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decreaseBitrateTimer_ :shaka.util.Timer

Type:
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enabled_ :boolean

Type:
  • boolean
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increaseBitrateTimer_ :shaka.util.Timer

Type:
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increaseVideoBitrateDelay_ :number

Type:
  • number
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isBuffering_ :boolean

Type:
  • boolean
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isPreviousSwitchIncrease_ :boolean

Type:
  • boolean
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isSwitchIncrease_ :boolean

Type:
  • boolean
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lastTimeChosenMs_ :number

The last wall-clock time, in milliseconds, when streams were chosen.
Type:
  • number
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maxProcessedUriCount_ :number

Type:
  • number
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playbackRate_ :number

Type:
  • number
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playerInterface_ :shaka.abr.SimpleLLAbrManager.PlayerInterface

Type:
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processedUris_ :Array.<string>

Type:
  • Array.<string>
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processedUriSet_ :Set.<string>

Type:
  • Set.<string>
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resetStallCountDelay_ :number

Type:
  • number
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resetStallCountTimer_ :shaka.util.Timer

Type:
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stallCount_ :number

Type:
  • number
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startupComplete_ :boolean

Type:
  • boolean
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suggestStreamTimer_ :shaka.util.Timer

Type:
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switch_ :shaka.extern.AbrManager.SwitchCallback

Type:
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variants_ :Array.<!shaka.extern.Variant>

A filtered list of Variants to choose from.
Type:
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Methods

filterAndSortVariants_(restrictionsnullable, variantsnon-null) → {Array.<shaka.extern.Variant>}

Parameters:
Name Type Attributes Description
restrictions shaka.extern.Restrictions <nullable>
variants Array.<shaka.extern.Variant>
Source:
Returns:
variants filtered according to |restrictions| and sorted in ascending order of bandwidth.
Type
Array.<shaka.extern.Variant>

chooseNextHigherBandwidthVariant_(sortedVariantsnon-null)

Find the first variant that greater than current bitrate
Parameters:
Name Type Description
sortedVariants Array.<shaka.extern.Variant>
Source:

chooseNextLowerBandwidthVariant_(sortedVariantsnon-null)

Find the first variant that smaller than current bitrate
Parameters:
Name Type Description
sortedVariants Array.<shaka.extern.Variant>
Source:

chooseVariant() → {shaka.extern.Variant}

Chooses one variant to switch to. Called by the Player.
Implements:
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Returns:
Type
shaka.extern.Variant

chooseVariantByBandwidth_(sortedVariantsnon-null)

Parameters:
Name Type Description
sortedVariants Array.<shaka.extern.Variant>
Source:

configure(config)

Sets the ABR configuration. It is the responsibility of the AbrManager implementation to implement the restrictions behavior described in shaka.extern.AbrConfiguration.
Parameters:
Name Type Description
config shaka.extern.AbrConfiguration
Implements:
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decreaseVideoBitrate_()

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disable()

Disables automatic Stream suggestions. After this, the AbrManager may not call switchCallback().
Implements:
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enable()

Enables automatic Variant choices from the last ones passed to setVariants. After this, the AbrManager may call switchCallback() at any time.
Implements:
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getBandwidthEstimate() → {number}

Gets an estimate of the current bandwidth in bit/sec. This is used by the Player to generate stats.
Implements:
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Returns:
Type
number

getCurrentVariant() → {shaka.extern.Variant}

Source:
Returns:
Type
shaka.extern.Variant

getDefaultBandwidth_()

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getIncreaseVideoBitrateDelay() → {number}

Source:
Returns:
Type
number

getProcessedUri(index) → {string}

Parameters:
Name Type Description
index number
Source:
Returns:
Type
string

getProcessedUriCount() → {number}

Source:
Returns:
Type
number

increaseVideoBitrate_()

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init(switchCallback)

Initializes the AbrManager.
Parameters:
Name Type Description
switchCallback shaka.extern.AbrManager.SwitchCallback
Implements:
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onBuffering()

Called when enter buffering state
Implements:
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onBufferingEnd()

Called when exit buffering state
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playbackRateChanged(rate)

Updates manager playback rate.
Parameters:
Name Type Description
rate number
Implements:
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resetStallCount_()

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scheduleIncreaseVideoBitrate_()

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scheduleResetStallCount_()

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scheduleSuggestStream_()

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segmentDownloadCompleted(deltaTimeMs, numBytes, urisnon-null, isFullSpeed)

Notifies the AbrManager that a segment download has been completed (includes MP4 SIDX data, WebM Cues data, initialization segments, and media segments).
Parameters:
Name Type Description
deltaTimeMs number The duration, in milliseconds, that the request took to complete.
numBytes number The total number of bytes transferred.
uris Array.<string>
isFullSpeed boolean
Implements:
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segmentDownloaded(deltaTimeMs, numBytes, uri)

Notifies the AbrManager that a segment has been downloaded (includes MP4 SIDX data, WebM Cues data, initialization segments, and media segments).
Parameters:
Name Type Description
deltaTimeMs number The duration, in milliseconds, that the request took to complete.
numBytes number The total number of bytes transferred.
uri string
Implements:
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setPlayerInterface(playerInterfacenullable)

Parameters:
Name Type Attributes Description
playerInterface shaka.abr.SimpleLLAbrManager.PlayerInterface <nullable>
Source:

setVariants(variantsnon-null)

Updates manager's variants collection.
Parameters:
Name Type Description
variants Array.<!shaka.extern.Variant>
Implements:
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stop()

Stops any background timers and frees any objects held by this instance. This will only be called after a call to init.
Implements:
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suggestStreams_()

Calls switch_() with the variant chosen by chooseVariant().
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Type Definitions

PlayerInterface

Type:
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