DefaultHTTPStreamingSwitchManager

套件	org.osmf.net.httpstreaming
類別	public class DefaultHTTPStreamingSwitchManager
繼承	DefaultHTTPStreamingSwitchManager RuleSwitchManagerBase NetStreamSwitchManagerBase EventDispatcher Object

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

Default implementation of SwitchManagerBase

相關 API 元素

org.osmf.net.abr.MetricBase
org.osmf.net.abr.RuleBase

公用屬性

隱藏繼承公用屬性

顯示繼承公用屬性

	屬性		定義自
		actualIndex : int [唯讀] The index of the currently downloading quality level	RuleSwitchManagerBase
		autoSwitch : Boolean [覆寫]	RuleSwitchManagerBase
		climbFactor : Number A factor to be applied when switching up.	DefaultHTTPStreamingSwitchManager
		constructor : Object 類別物件的參照或是特定物件實體的建構函數。	Object
		currentIndex : uint [覆寫] [唯讀]	RuleSwitchManagerBase
		emergencyRules : Vector.<RuleBase> [唯讀] Array of normal rules to be used in the algorithm.	RuleSwitchManagerBase
		maxAllowedIndex : int The highest stream index that the switching manager is allowed to switch to.	NetStreamSwitchManagerBase
		maxDownSwitchLimit : int The maximum difference between the indices of the old and new quality level when switching down.	DefaultHTTPStreamingSwitchManager
		maxReliabilityRecordSize : uint The maximum length of the reliability record (how many switches to remember)	DefaultHTTPStreamingSwitchManager
		maxUpSwitchLimit : int The maximum difference between the indices of the old and new quality level when switching up.	DefaultHTTPStreamingSwitchManager
		metricRepository : MetricRepository [唯讀] The metric repository responsible with providing the metrics	RuleSwitchManagerBase
		minReliability : Number The minimum reliability for a quality level to be used.	DefaultHTTPStreamingSwitchManager
		minReliabilityRecordSize : uint The minimum length of the reliability record below which reliability is not an issue	DefaultHTTPStreamingSwitchManager
		normalRules : Vector.<RuleBase> [唯讀] Array of normal rules to be used in the algorithm.	DefaultHTTPStreamingSwitchManager
		normalRuleWeights : Vector.<Number> The weights of the normal rules (their importance in the algorithm). Valid values must obey the following rules: same number of weights as there are rules all rules must be equal or greater than zero at least one weight must be non-zero	DefaultHTTPStreamingSwitchManager

保護屬性

隱藏繼承保護屬性

顯示繼承保護屬性

	屬性		定義自
		_autoSwitch : Boolean	NetStreamSwitchManagerBase
		_maxAllowedIndex : int	NetStreamSwitchManagerBase

公用方法

隱藏繼承公用方法

顯示繼承公用方法

	方法		定義自
		DefaultHTTPStreamingSwitchManager(notifier:EventDispatcher, switcher:NetStreamSwitcher, metricRepository:MetricRepository, emergencyRules:Vector.<RuleBase> = null, autoSwitch:Boolean = true, normalRules:Vector.<RuleBase> = null, normalRuleWeights:Vector.<Number> = null, minReliability:Number = 0.85, minReliabilityRecordSize:uint = 5, maxReliabilityRecordSize:uint = 30, climbFactor:Number = 0.9, maxUpSwitchLimit:int = 1, maxDownSwitchLimit:int = 2) Constructor.	DefaultHTTPStreamingSwitchManager
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void 會在 EventDispatcher 物件註冊事件偵聽程式，以便讓偵聽程式收到事件的通知。	EventDispatcher
		dispatchEvent(event:Event):Boolean 會將事件傳送到事件流程。	EventDispatcher
		getCurrentReliability(index:uint):Number The current reliability of the specified index.	DefaultHTTPStreamingSwitchManager
		getNewEmergencyIndex(maxBitrate:Number):uint [覆寫] Returns an index that satisfies the maxBitrate constraint	DefaultHTTPStreamingSwitchManager
		getNewIndex():uint [覆寫] Computes the necessary rules and metrics and determines the index to switch to.	DefaultHTTPStreamingSwitchManager
		hasEventListener(type:String):Boolean 會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。	EventDispatcher
		hasOwnProperty(name:String):Boolean 指出物件是否有已定義的指定屬性。	Object
		isPrototypeOf(theClass:Object):Boolean 指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。	Object
		propertyIsEnumerable(name:String):Boolean 指出指定的屬性是否存在，以及是否可列舉。	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void 會從 EventDispatcher 物件移除偵聽程式。	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void 為迴圈作業設定動態屬性的可用性。	Object
		switchTo(index:int):void [覆寫]	RuleSwitchManagerBase
		toLocaleString():String 傳回代表此物件的字串，根據地區特定慣例進行格式化。	Object
		toString():String 會傳回指定之物件的字串形式。	Object
		valueOf():Object 會傳回指定之物件的基本值。	Object
		willTrigger(type:String):Boolean 檢查此 EventDispatcher 物件是否已註冊事件偵聽程式，或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。	EventDispatcher

保護方法

	方法		定義自
		getMaxIndex(maxBitrate:Number, emergencyFlag:Boolean = false):uint Determines maximum available index whose declared bitrate is smaller than maxBitrate.	DefaultHTTPStreamingSwitchManager
		isReliable(index:uint):Boolean Determines whether an index is reliable. This is achieved by comparing the index's reliability with the minimumReliability	DefaultHTTPStreamingSwitchManager
		setNormalRules(value:Vector.<RuleBase>):void Array of normal rules to be used in the algorithm.	DefaultHTTPStreamingSwitchManager

事件

按一下以瞭解事件的詳細資訊

隱藏繼承事件

顯示繼承事件

	事件		摘要	定義自
		activate	[廣播事件] 當 Flash Player 或 AIR 應用程式取得作業系統焦點並成為作用中時傳送。	EventDispatcher
		deactivate	[廣播事件] 當 Flash Player 或 AIR 應用程式失去作業系統焦點並成為非作用中時傳送。	EventDispatcher

屬性詳細資訊

climbFactor

屬性

climbFactor:Number

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

A factor to be applied when switching up. For example: currently playing 300kbps; new ideal bitrate = 1000kbps This means that: max bitrate = 300 + climbFactor x (1000 - 300)

It must be equal or greater than 0

實作
public function get climbFactor():Number
public function set climbFactor(value:Number):void

擲回值

ArgumentError — If it is set to a negative value

maxDownSwitchLimit

屬性

maxDownSwitchLimit:int

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

The maximum difference between the indices of the old and new quality level when switching down. Set this to a -1 to disable the constraint.

This works in conjunction with the reliability constraint. If no reliable stream is available inside the maxDownSwitchLimit, no switch will be performed. The maxDownSwitchLimit constraint does not apply to emergency switches.

實作
public function get maxDownSwitchLimit():int
public function set maxDownSwitchLimit(value:int):void

maxReliabilityRecordSize

屬性

maxReliabilityRecordSize:uint

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

The maximum length of the reliability record (how many switches to remember)

實作
public function get maxReliabilityRecordSize():uint
public function set maxReliabilityRecordSize(value:uint):void

maxUpSwitchLimit

屬性

maxUpSwitchLimit:int

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

The maximum difference between the indices of the old and new quality level when switching up. Set this to a -1 to disable the constraint.

This works in conjunction with the reliability constraint. If no reliable stream is available inside the maxUpSwitchLlimit, no switch will be performed.

實作
public function get maxUpSwitchLimit():int
public function set maxUpSwitchLimit(value:int):void

minReliability

屬性

minReliability:Number

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

The minimum reliability for a quality level to be used. This value must be a number in the [0-1] interval (inclusive)

實作
public function get minReliability():Number
public function set minReliability(value:Number):void

擲回值

ArgumentError — If it is set to an invalid value

minReliabilityRecordSize

屬性

minReliabilityRecordSize:uint

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

The minimum length of the reliability record below which reliability is not an issue

實作
public function get minReliabilityRecordSize():uint
public function set minReliabilityRecordSize(value:uint):void

normalRules

屬性

normalRules:Vector.<RuleBase> [唯讀]

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

Array of normal rules to be used in the algorithm. A normal rule can recommend both lower and higher bitrates than the current one

實作
public function get normalRules():Vector.<RuleBase>

normalRuleWeights

屬性

normalRuleWeights:Vector.<Number>

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

The weights of the normal rules (their importance in the algorithm). Valid values must obey the following rules:

same number of weights as there are rules
all rules must be equal or greater than zero
at least one weight must be non-zero

實作
public function get normalRuleWeights():Vector.<Number>
public function set normalRuleWeights(value:Vector.<Number>):void

擲回值

ArgumentError — If the weights are not valid, by breaking at least one of the above criteria

建構函式詳細資料

()

建構函式

public function DefaultHTTPStreamingSwitchManager(notifier:EventDispatcher, switcher:NetStreamSwitcher, metricRepository:MetricRepository, emergencyRules:Vector.<RuleBase> = null, autoSwitch:Boolean = true, normalRules:Vector.<RuleBase> = null, normalRuleWeights:Vector.<Number> = null, minReliability:Number = 0.85, minReliabilityRecordSize:uint = 5, maxReliabilityRecordSize:uint = 30, climbFactor:Number = 0.9, maxUpSwitchLimit:int = 1, maxDownSwitchLimit:int = 2)

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

Constructor.

參數

	`notifier:EventDispatcher` — An object that dispatches the HTTPStreamingEvent.RUN_ALGORITHM event

	`switcher:NetStreamSwitcher` — The NetStreamSwitcher to use for switching

	`metricRepository:MetricRepository` — The repository responsible with providing metrics

	`emergencyRules:Vector.<RuleBase>` (default = `null`) — Array of rules to be used in the algorithm. An emergency rule can only recommend lower bitrates than the current one.

	`autoSwitch:Boolean` (default = `true`) — Flag deciding whether autoSwitch should be enabled

	`normalRules:Vector.<RuleBase>` (default = `null`) — Array of normal rules to be used in the algorithm. A normal rule can recommend both lower and higher bitrates than the current one.

	`normalRuleWeights:Vector.<Number>` (default = `null`) — The weights of the normal rules (their importance in the algorithm)

	`minReliability:Number` (default = `0.85`) — The minimum reliability for a quality level to be used

	`minReliabilityRecordSize:uint` (default = `5`) — The maximum length of the reliability record (how many switches to remember)

	`maxReliabilityRecordSize:uint` (default = `30`) — The minimum length of the reliability record below which reliability is not an issue

	`climbFactor:Number` (default = `0.9`) — A factor to be applied when switching up. For example: currently playing 300kbps; new ideal bitrate = 1000kbps This means that: max bitrate = 300 + climbFactor x (1000 - 300)

	`maxUpSwitchLimit:int` (default = `1`) — The maximum difference between the indices of the old and new quality level when switching up. Set this to -1 to disable the constraint. This works in conjunction with the reliability constraint. If no reliable stream is available inside the maxUpSwitchLimit, no switch will be performed.

	`maxDownSwitchLimit:int` (default = `2`) — The maximum difference between the indices of the old and new quality level when switching down. Set this to -1 value to disable the constraint. This works in conjunction with the reliability constraint. If no reliable stream is available inside the maxDownSwitchLimit, no switch will be performed. The maxDownSwitchLimit constraint does not apply to emergency switches.

方法詳細資訊

getCurrentReliability

()

方法

public function getCurrentReliability(index:uint):Number

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

The current reliability of the specified index.

參數

index:uint

傳回值

Number — A number between 0 (most unreliable) and 1 (most reliable)

getMaxIndex

()

方法

protected function getMaxIndex(maxBitrate:Number, emergencyFlag:Boolean = false):uint

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

Determines maximum available index whose declared bitrate is smaller than maxBitrate. Only reliable indices (indices that pass the isReliable() function) are taken into consideration.

參數

	`maxBitrate:Number` — The maximum bitrate to which the index must comply

	`emergencyFlag:Boolean` (default = `false`)

傳回值

uint — The index satisfying the aforementioned condition

相關 API 元素

isReliable()

getNewEmergencyIndex

()

方法

override public function getNewEmergencyIndex(maxBitrate:Number):uint

Returns an index that satisfies the maxBitrate constraint

參數

maxBitrate:Number

傳回值

uint

getNewIndex

()

方法

override public function getNewIndex():uint

Computes the necessary rules and metrics and determines the index to switch to. The index must be a valid one (it can be higher than maxAllowedIndex, but it should be a real index that is available)

傳回值

uint

isReliable

()

方法

protected function isReliable(index:uint):Boolean

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

Determines whether an index is reliable. This is achieved by comparing the index's reliability with the minimumReliability

參數

index:uint

傳回值

Boolean

setNormalRules

()

方法

protected function setNormalRules(value:Vector.<RuleBase>):void

語言版本:

ActionScript 3.0

產品版本:

OSMF 2.0

執行階段版本:

Flash Player 10, AIR 1.5

Array of normal rules to be used in the algorithm. A normal rule can recommend both lower and higher bitrates than the current one.

參數

value:Vector.<RuleBase>

相關 API 元素

normalRules

法律聲明 | 線上隱私權政策

DefaultHTTPStreamingSwitchManager - AS3 OSMF

類別 x

climbFactor

maxDownSwitchLimit

maxReliabilityRecordSize

maxUpSwitchLimit

minReliability

minReliabilityRecordSize

normalRules

normalRuleWeights