Constructor
new SimpleLLAbrManager()
This defines the default Low Latency ABR manager for the Player
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Members
bufferingTimeToDecreaseBitrate_ :number
Type:
- number
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bufferLevelDropToDecreaseBitrate_ :number
Buffer level drop to decrease bitrate, range 0.0 to 1.0
Type:
- number
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bufferLevelHistory_ :Array.<number>
Type:
- Array.<number>
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consecutiveFailedIncreaseVideoBitrateCount_ :number
Type:
- number
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lastTimeChosenMs_ :number
The last wall-clock time, in milliseconds, when streams were chosen.
Type:
- number
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variants_ :Array.<!shaka.extern.Variant>
A filtered list of Variants to choose from.
Type:
- Array.<!shaka.extern.Variant>
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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> |
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Returns:
variants filtered according to
|restrictions| and sorted in ascending order of bandwidth.
- Type
- Array.<shaka.extern.Variant>
chooseVariant() → {shaka.extern.Variant}
Chooses one variant to switch to. Called by the Player.
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Returns:
- Type
- shaka.extern.Variant
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 |
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decreaseVideoBitrate_()
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disable()
Disables automatic Stream suggestions. After this, the AbrManager may not
call switchCallback().
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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.
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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.
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Returns:
- Type
- number
getDefaultBandwidth_()
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getIncreaseVideoBitrateDelay() → {number}
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Returns:
- Type
- number
increaseVideoBitrate_()
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init(switchCallback)
Initializes the AbrManager.
Parameters:
| Name | Type | Description |
|---|---|---|
switchCallback |
shaka.extern.AbrManager.SwitchCallback |
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monitorBuffer_()
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onBuffering()
Called when enter buffering state
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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 |
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resetStallCount_()
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scheduleIncreaseVideoBitrate_()
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scheduleResetStallCount_()
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segmentDownloaded(deltaTimeMs, numBytes)
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. |
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setPlayerInterface(playerInterfacenullable)
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
playerInterface |
shaka.abr.SimpleLLAbrManager.PlayerInterface |
<nullable> |
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setVariants(variantsnon-null)
Updates manager's variants collection.
Parameters:
| Name | Type | Description |
|---|---|---|
variants |
Array.<!shaka.extern.Variant> |
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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.
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suggestStreams_()
Calls switch_() with the variant chosen by chooseVariant().
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Type Definitions
PlayerInterface
Type:
- {getBufferLevel: function(): number, getPresentationLatency: function(): Array.<Object>, getServiceDescription: (function(): shaka.extern.ServiceDescription|undefined)}
Properties:
| Name | Type | Description |
|---|---|---|
getBufferLevel |
function | Get the buffer level in seconds |
getPresentationLatency |
function | Get the presentation latency |
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