C# Class wpf_player.ObservableStream

This class extends memory stream to allow waiting state management and position change notify. Using the WaitForMore method, a event will be launched when the needed data has been read. Position Changed event will be launched when more data has been written on the stream: the maximum resolution for this events is 1024 byte; if the position changed for less than 1024 byte the event won't be raised.

Inheritance: System.IO.MemoryStream

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Public Methods

Method	Description
ObservableStream ( ) : System	Default constructor
ObservableStream ( byte buffer ) : System	Byte-buffer constructor
ObservableStream ( byte buffer, bool writable ) : System	See MSDN Reference for Memory Stream for Details
ObservableStream ( byte buffer, int index, int count ) : System	See MSDN Reference for Memory Stream for Details
ObservableStream ( byte buffer, int index, int count, bool writable ) : System	See MSDN Reference for Memory Stream for Details
ObservableStream ( byte buffer, int index, int count, bool writable, bool isVisible ) : System	See MSDN Reference for Memory Stream for Details
ObservableStream ( int capacity ) : System	Capacity contructor. Create a buffer with the given capacity
WaitForMore ( int how_many = 15000 ) : void	Sets the waiting state for the stream and sets the position waited.
Write ( byte buffer, int offset, int count ) : void	This method after the call of the base class implementation uses the launchEvent method to raise the right event See MSDN Reference for Memory Stream for Details.
WriteByte ( byte value ) : void	This method after the call of the base class implementation uses the launchEvent method to raise the right event See MSDN Reference for Memory Stream for Details.

Protected Methods

Method	Description
OnPositionChanges ( EventArgs args ) : void	This method calls the event handler for the position changed event
OnWaitedPositionReached ( EventArgs args ) : void	This method calls the event handler for the waited position reached event

Private Methods

Method	Description
launchEvent ( ) : void	This method is used to launch stream events. This performs check for waiting state and last launched position and raise the right event in the right moment.

Method Details

ObservableStream() public method

Default constructor

public ObservableStream ( ) : System
return	System

ObservableStream() public method

Byte-buffer constructor

public ObservableStream ( byte buffer ) : System
buffer	byte	Byte buffer used by the stream
return	System

ObservableStream() public method

See MSDN Reference for Memory Stream for Details

public ObservableStream ( byte buffer, bool writable ) : System
buffer	byte
writable	bool
return	System

ObservableStream() public method

See MSDN Reference for Memory Stream for Details

public ObservableStream ( byte buffer, int index, int count ) : System
buffer	byte
index	int
count	int
return	System

ObservableStream() public method

See MSDN Reference for Memory Stream for Details

public ObservableStream ( byte buffer, int index, int count, bool writable ) : System
buffer	byte
index	int
count	int
writable	bool
return	System

ObservableStream() public method

See MSDN Reference for Memory Stream for Details

public ObservableStream ( byte buffer, int index, int count, bool writable, bool isVisible ) : System
buffer	byte
index	int
count	int
writable	bool
isVisible	bool
return	System

ObservableStream() public method

Capacity contructor. Create a buffer with the given capacity

public ObservableStream ( int capacity ) : System
capacity	int	Capacity of the stream buffer
return	System

OnPositionChanges() protected method

This method calls the event handler for the position changed event

protected OnPositionChanges ( EventArgs args ) : void
args	System.EventArgs	Arguments that will be passed to the handler
return	void

OnWaitedPositionReached() protected method

This method calls the event handler for the waited position reached event

protected OnWaitedPositionReached ( EventArgs args ) : void
args	System.EventArgs	Arguments that will be passed to the handler
return	void

WaitForMore() public method

Sets the waiting state for the stream and sets the position waited.

public WaitForMore ( int how_many = 15000 ) : void
how_many	int	Number of bytes needed. Default is 15000
return	void

Write() public method

This method after the call of the base class implementation uses the launchEvent method to raise the right event See MSDN Reference for Memory Stream for Details.

public Write ( byte buffer, int offset, int count ) : void
buffer	byte
offset	int
count	int
return	void

WriteByte() public method

This method after the call of the base class implementation uses the launchEvent method to raise the right event See MSDN Reference for Memory Stream for Details.

public WriteByte ( byte value ) : void
value	byte
return	void