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cLiveReceiver Class Reference

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-Inheritance diagram for cLiveReceiver:

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-Collaboration diagram for cLiveReceiver:

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Public Member Functions
virtual void open (UpnpOpenFileMode mode)
virtual int read (char *buf, size_t buflen)
virtual int write (char *buf, size_t buflen)
virtual int seek (off_t offset, int whence)
virtual void close ()

Static Public Member Functions
static cLiveReceiver * newInstance (cChannel *Channel, int Priority)

Protected Member Functions
virtual void Receive (uchar *Data, int Length)
virtual void Activate (bool On)
virtual void Action (void)
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Detailed Description

-A receiver for live TV

-This is a receiver object which is attached to a VDR tv card device. It is receiving transport stream packages and generates a single MPEG2 transport stream which can be distributed through the network.

Member Function Documentation

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void cLiveReceiver::Action ( void ) [protected, virtual]

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-The receiver thread action

-This actually is the receiver thread, which runs consequitivelly and buffers any received video data from the interal incoming buffer to the internal outgoing buffer.

-While doing so, it tries to syncronize with the stream and creates new MPEG2-TS PATs and PMTs for a single MPEG2-TS stream -

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void cLiveReceiver::Activate ( bool On ) [protected, virtual]

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-Activates the receiver

-This activates the receiver which initializes internal data structures to be prepared for receiving data from the VDR

-If the parameter is true, the receiver will be activated. If it is false, the receiver will be deactivated and stops its threads.

Parameters:

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On

Activates the receiver thread

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void cLiveReceiver::close ( ) [virtual]

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-Closes the open file

-This will close open file handles and frees the memory obtained by it. -

Implements cFileHandle.

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cLiveReceiver * cLiveReceiver::newInstance	(	cChannel *	Channel,
		int	Priority
	)			`[static]`

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-Creates a new receiver instance

-This will create a new instance of a live receiver for the specified channel at the specified priority level.

-A negativ priority means that the receiver may being detached from a device.

-The receiver must be free'd with delete after it is not used anylonger.

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Returns:: returns a new liveReceiver instance

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Parameters:

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	Channel	the channel which shall be tuned
	Priority	the priority level

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void cLiveReceiver::open ( UpnpOpenFileMode mode ) [virtual]

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-Opens the file

-Opens the file at the given mode. These can be:

UPNP_READ, to read from the file
UPNP_WRITE, to write to the file

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Parameters:

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mode

The file mode, i.e. one of the following

UPNP_READ
UPNP_WRITE

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Implements cFileHandle.

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int cLiveReceiver::read	(	char *	buf,
		size_t	buflen
	)			`[virtual]`

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-Reads from the file

-Reads from the file a certain amount of bytes and stores them in a buffer

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Returns:

returns

<0, in case of an error
0, when reading was successful

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Parameters:

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	buf	The char buffer
	buflen	The size of the buffer

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Implements cFileHandle.

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void cLiveReceiver::Receive	(	uchar *	Data,
		int	Length
	)			`[protected, virtual]`

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-Receives data from VDR

-This is the interface for receiving packet data from the VDR. It buffers the incoming transport stream packets in a linear ringbuffer and returns immediatelly

Parameters:

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	Data	The data received from VDR
	Length	The length of the data packet, usually 188 bytes

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int cLiveReceiver::seek	(	off_t	offset,
		int	whence
	)			`[virtual]`

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-Seeks in the file

-Seeks in the file where the offset is the relativ position depending on the second parameter. This means, in case of

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SEEK_SET, the offset is relative to the beginning of the file
SEEK_CUR, it is relative to the current position or
SEEK_END, relative to the end of the file.

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Returns:

returns

<0, in case of an error
0, when reading was successful

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Parameters:

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	offset	The byte offset in the file
	whence	one of the following - SEEK_SET, SEEK_CUR, SEEK_END -

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Implements cFileHandle.

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int cLiveReceiver::write	(	char *	buf,
		size_t	buflen
	)			`[virtual]`

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-Writes to the file

-Writes to the file a certain amount of bytes which are stored in a buffer

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Returns:

returns

<0, in case of an error
0, when reading was successful

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Parameters:

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	buf	The char buffer
	buflen	The size of the buffer

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Implements cFileHandle.

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The documentation for this class was generated from the following files:

receiver/livereceiver.h
receiver/livereceiver.cpp

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Public Member Functions
virtual void	open (UpnpOpenFileMode mode)
virtual int	read (char *buf, size_t buflen)
virtual int	write (char *buf, size_t buflen)
virtual int	seek (off_t offset, int whence)
virtual void	close ()
Static Public Member Functions
static cLiveReceiver *	newInstance (cChannel *Channel, int Priority)
Protected Member Functions
virtual void	Receive (uchar *Data, int Length)
virtual void	Activate (bool On)
virtual void	Action (void)