NetStreamSwitchManager

Package	org.osmf.net
Class	public class NetStreamSwitchManager
Inheritance	NetStreamSwitchManager NetStreamSwitchManagerBase EventDispatcher Object

Language Version:

ActionScript 3.0

Product Version:

OSMF 1.0

Runtime Versions:

Flash Player 10, AIR 1.5

NetStreamSwitchManager is a default implementation of NetStreamSwitchManagerBase. It manages transitions between multi-bitrate (MBR) streams using configurable switching rules.

Public Properties

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	Property		Defined By
		autoSwitch : Boolean Indicates whether the switching manager should automatically switch between streams.	NetStreamSwitchManagerBase
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		currentIndex : uint [read-only] Returns the current stream index that is rendering on the client.	NetStreamSwitchManagerBase
		maxAllowedIndex : int The highest stream index that the switching manager is allowed to switch to.	NetStreamSwitchManagerBase

Protected Properties

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	Property		Defined By
		_autoSwitch : Boolean	NetStreamSwitchManagerBase
		bandwidthLimit : Number The multiplier to apply to the maximum bandwidth for the client.	NetStreamSwitchManager
		_maxAllowedIndex : int	NetStreamSwitchManagerBase

Public Methods

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	Method		Defined By
		NetStreamSwitchManager(connection:NetConnection, netStream:NetStream, resource:DynamicStreamingResource, metrics:NetStreamMetricsBase, switchingRules:Vector.<SwitchingRuleBase>, autoSwitch:Boolean = true) Constructor.	NetStreamSwitchManager
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.	EventDispatcher
		dispatchEvent(event:Event):Boolean Dispatches an event into the event flow.	EventDispatcher
		hasEventListener(type:String):Boolean Checks whether the EventDispatcher object has any listeners registered for a specific type of event.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Removes a listener from the EventDispatcher object.	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		switchTo(index:int):void Initiate a switch to the stream with the given index.	NetStreamSwitchManagerBase
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object
		willTrigger(type:String):Boolean Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.	EventDispatcher

Protected Methods

	Method		Defined By
		canAutoSwitchNow(newIndex:int):Boolean Override this method to provide additional decisioning around allowing automatic switches to occur.	NetStreamSwitchManager

Events

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	Event		Summary	Defined By
		activate	[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.	EventDispatcher
		deactivate	[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.	EventDispatcher

Property Detail

bandwidthLimit

property

bandwidthLimit:Number

The multiplier to apply to the maximum bandwidth for the client. The default is 140% of the highest bitrate stream.

Implementation
protected function get bandwidthLimit():Number
protected function set bandwidthLimit(value:Number):void

Constructor Detail

()

Constructor

public function NetStreamSwitchManager(connection:NetConnection, netStream:NetStream, resource:DynamicStreamingResource, metrics:NetStreamMetricsBase, switchingRules:Vector.<SwitchingRuleBase>, autoSwitch:Boolean = true)

Language Version:

ActionScript 3.0

Product Version:

OSMF 1.0

Runtime Versions:

Flash Player 10, AIR 1.5

Constructor.

Parameters

	`connection:NetConnection` — The NetConnection for the NetStream that will be managed.

	`netStream:NetStream` — The NetStream to manage.

	`resource:DynamicStreamingResource` — The DynamicStreamingResource that is playing in the NetStream.

	`metrics:NetStreamMetricsBase` — The provider of runtime metrics.

	`switchingRules:Vector.<SwitchingRuleBase>` — The switching rules that this manager will use.

	`autoSwitch:Boolean` (default = `true`)

Method Detail

canAutoSwitchNow

()

method

protected function canAutoSwitchNow(newIndex:int):Boolean

Override this method to provide additional decisioning around allowing automatic switches to occur. This method will be invoked just prior to a switch request. If false is returned, that switch request will not take place.

By default, the implementation does the following:

1) When a switch down occurs, the stream being switched from has its failed count incremented. If, when the switching rules are evaluated again, a rule suggests switching up, since the stream previously failed, it won't be tried again until a duration (30s) elapses. This provides a better user experience by preventing a situation where the switch up is attempted but then fails almost immediately.

2) Once a stream item has 3 failures, there will be no more attempts to switch to it until an interval (5m) has expired. At the end of this interval, all failed counts are reset to zero.

Parameters

newIndex:int — The new index to switch to.

Returns

Boolean

NetStreamSwitchManager - AS3 OSMF

Classes x

bandwidthLimit

NetStreamSwitchManager

canAutoSwitchNow

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